CN113922434B

CN113922434B - Power supply device and charging control method

Info

Publication number: CN113922434B
Application number: CN202010665065.3A
Authority: CN
Inventors: 江森龙; 田晨; 林尚波
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2025-02-11
Anticipated expiration: 2040-07-10
Also published as: CN113922434A; WO2022007577A1

Abstract

The disclosure provides a power supply device and a charging control method, and relates to the technical field of charging. The power supply device comprises a first power supply module, a second power supply module, at least one second power supply module and a charging interface, wherein the first power supply module is used for converting received alternating voltage into first direct voltage, the second power supply module is connected with the output end of the first power supply module in series and used for converting the received alternating voltage into second direct voltage, the charging interface is respectively connected with the first power supply module and the second power supply module and used for providing output voltage with the voltage value being the sum of the voltage value of the first direct voltage and the voltage value of the second direct voltage, and the voltage value of the second voltage is determined by the first power supply module.

Description

Power supply device and charging control method

Technical Field

The disclosure relates to the field of charging technologies, and in particular, to a power supply device and a charging control method.

Background

With the wide application of electronic devices (such as smart terminal devices of smart phones, tablet computers, etc.), the functions of the electronic devices are more and more, but the power consumption is correspondingly increased, and frequent charging is required. In order to increase the charging speed, it is necessary that the corresponding power adapter is capable of outputting more electric power.

However, the power adapter capable of outputting larger power is larger in size, inconvenient to carry about and poor in user experience.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure provides a power supply device and a charging control method.

Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.

According to one aspect of the disclosure, a power supply device is provided, which comprises a first power supply module, a second power supply module, at least one charging interface and a power supply module, wherein the first power supply module is used for converting received alternating current voltage into first direct current voltage, the second power supply module is connected with the output end of the first power supply module in series and is used for converting the received alternating current voltage into second direct current voltage, the charging interface is respectively connected with the first power supply module and the second power supply module and is used for providing output voltage with the voltage value being the sum of the voltage value of the first direct current voltage and the voltage value of the second direct current voltage, and the voltage value of the second voltage is determined by the first power supply module.

According to another aspect of the present disclosure, there is provided a power supply apparatus including a first power supply module for converting a received ac voltage into a first dc voltage, a second power supply module having an output connected in series with the output of the first power supply module for converting the received ac voltage into a second dc voltage, at least one of the second power supply modules, a charging interface connected to the first power supply module and the second power supply module, respectively, for providing an output voltage having a voltage value that is a sum of a voltage value of the first dc voltage and a voltage value of the second dc voltage, and a control unit connected to the first power supply module and the second power supply module, respectively, for determining a voltage value of the first dc voltage and a voltage value of the second dc voltage.

According to still another aspect of the present disclosure, a charging control method is provided, and the charging control method is applied to a power supply device, and comprises the steps of converting a received alternating voltage into a first direct voltage through a first power supply module in the power supply device, converting the received alternating voltage into a second direct voltage through a second power supply module of the power supply device, and providing an output voltage with a voltage value being the sum of the voltage value of the first direct voltage and the voltage value of the second direct voltage through a charging interface of the power supply device, wherein the voltage value of the second voltage is determined by the first power supply module, and the number of the second power supply modules is at least one.

According to still another aspect of the present disclosure, a charging control method is provided, which is applied to a power supply device and includes converting a received ac voltage into a first dc voltage by a first power supply module in the power supply device, converting the received ac voltage into a second dc voltage by a second power supply module in the power supply device, determining a voltage value of the first dc voltage and a voltage value of the second dc voltage by a control unit in the power supply device, and providing an output voltage having a voltage value that is a sum of the voltage value of the first dc voltage and the voltage value of the second dc voltage through a charging interface of the power supply device, wherein the number of the second power supply modules is at least one.

According to the power supply device provided by the embodiment of the disclosure, a plurality of power supply modules connected in series are packaged, so that the power supply device can be miniaturized on the premise of improving output power. In addition, the power supply device determines the direct current voltage output by each power supply module by the main power supply module, so that the cooperation among the power supply modules can be ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic diagram of a charging system according to an exemplary embodiment.

Fig. 2 is a schematic diagram showing a structure of a power supply apparatus according to an exemplary embodiment.

Fig. 3 is a schematic structural view of another power supply apparatus according to an exemplary embodiment.

Fig. 4 is a schematic structural view of still another power supply apparatus according to an exemplary embodiment.

Fig. 5A is a schematic diagram of a power supply device according to an example.

Fig. 5B is a schematic diagram illustrating stacking of a first power module and a second power module according to an example.

Fig. 6A is a schematic diagram illustrating a structure of a first power supply module according to an exemplary embodiment.

Fig. 6B is a schematic diagram illustrating a structure of a second power supply module according to an exemplary embodiment.

Fig. 7A is a schematic structural view of another first power supply module according to an exemplary embodiment.

Fig. 7B is a schematic diagram illustrating a structure of another second power supply module according to an exemplary embodiment.

Fig. 7C is a schematic structural view of still another first power supply module according to an exemplary embodiment.

Fig. 7D is a schematic diagram illustrating a structure of still another second power supply module according to an exemplary embodiment.

Fig. 7E is a schematic structural view of still another first power supply module according to an exemplary embodiment.

Fig. 7F is a schematic structural view of still another second power supply module according to an exemplary embodiment.

Fig. 8 is a schematic structural view of still another power supply apparatus according to an exemplary embodiment.

Fig. 9A is a schematic structural view of still another first power supply module according to an exemplary embodiment.

Fig. 9B is a schematic diagram illustrating a structure of still another second power supply module according to an exemplary embodiment.

Fig. 10A is a schematic structural view of still another power supply device according to an exemplary embodiment.

Fig. 10B is a schematic structural view of still another power supply device according to an exemplary embodiment.

Fig. 11 is a flowchart illustrating a charge control method according to an exemplary embodiment.

Fig. 12 is a flowchart illustrating another charge control method according to an exemplary embodiment.

Fig. 13 is a flowchart illustrating yet another charge control method according to an exemplary embodiment.

Fig. 14 is a flowchart illustrating yet another charge control method according to an exemplary embodiment.

Fig. 15 is a flowchart illustrating yet another charge control method according to an exemplary embodiment.

Fig. 16 is a flowchart illustrating yet another charge control method according to an exemplary embodiment.

Fig. 17 is a flowchart illustrating yet another charge control method according to an exemplary embodiment.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software or in one or more hardware modules or integrated circuits or in different networks and/or processor devices and/or microcontroller devices.

In the present disclosure, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other, directly connected, indirectly connected via an intermediate medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless explicitly specified otherwise. "and/or" describes an association relationship of an associated object, meaning that there may be three relationships, e.g., a and/or B, and that there may be a alone, B alone, and both a and B.

Next, a power supply device and a charge control method in example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings and examples.

Referring to fig. 1, a charging system 1 includes a power supply device 11 and a device to be charged 12.

The Power supply device 11 is, for example, a Power adapter, a mobile Power source (Power Bank), or the like.

The power supply device 11 is connected with the device to be charged 12 through a cable, and supplies electric energy to the device to be charged 12 to charge the battery 122 in the device to be charged 12.

The device 12 to be charged may be, for example, a terminal or an electronic device, which may be a mobile phone, a game host, a tablet computer, an electronic book reader, a smart wearable device, an MP4 (MovingPicture Experts Group Audio Layer IV, dynamic image expert compression standard audio layer 4) player, a smart home device, an AR (Augmented Reality) device, a VR (Virtual Reality) device, or a mobile terminal, which may also be a mobile power source (such as a charger, a travel charger), an electronic cigarette, a wireless mouse, a wireless keyboard, a wireless headset, a bluetooth speaker, or a chargeable electronic device with a charging function, such as a laptop and a desktop computer, or may also be a personal computer (Personal Computer, PC).

The device to be charged 12 is connected to the charging interface 113 in the power supply 11 through the charging interface 121.

The charging interface 121 may be, for example, a USB interface satisfying the USB 2.0 specification, the USB3.0 specification, or the USB3.1 specification, including a Micro USB interface or a USB TYPE-C interface, etc. In some embodiments, the charging interface 121 may also be a lighting interface, or any other type of parallel or serial port that can be used for charging.

Accordingly, the charging interface 113 may be a male plug of a USB interface or a lighting interface adapted to the charging interface 121 and meeting the USB 2.0 specification, the USB3.0 specification or the USB3.1 specification.

The power supply device 11 can communicate with the device 12 to be charged through the charging interface 113 and the charging interface 121, for example, and both do not need to provide an additional communication interface or other wireless communication modules. If the charging interface 113 and the charging interface 121 are USB interfaces, the power supply device 11 and the device 12 to be charged may communicate based on data lines (e.g., d+ and/or D-lines) in the USB interfaces. As another example, the charging interface 113 and the charging interface 121 are USB interfaces (such as USB TYPE-C interfaces) supporting a power transmission (PD) communication protocol, the power supply apparatus 11 and the device to be charged 12 may communicate based on the PD communication protocol. In addition, the power supply device 11 and the to-be-charged apparatus 12 may also communicate by other communication means than the charging interface 113 and the charging interface 121. For example, the power supply device 11 and the to-be-charged apparatus 12 communicate by wireless means, such as Near Field Communication (NFC), or the like.

Taking the charging interface 121 and the charging interface 113 as USB interfaces as examples, when the device to be charged 12 is connected to the power supply device 11 through a cable, the device to be charged 12 identifies whether the connection Port provided by the power supply device 11 is a dedicated charging Port (DEDICATED CHARGING Port, DCP), which does not support data transmission, and can provide a charging current of 1.5A or more, and a short circuit is provided between the d+ and D-lines of the Port. This type of port can support higher charge capacity chargers and vehicle chargers. Specifically, the device to be charged 12 recognizes whether the connection port provided by the power supply device 11 is a DCP through the BC2.1 protocol. BC2.1 is a USB charging specification that specifies the detection, control, and reporting mechanisms for device charging through a USB port. The BC2.1 protocol is well known to those of ordinary skill in the art and is not described in detail herein to avoid obscuring the present disclosure.

The device to be charged 12 can further identify the type of the power supply device 11 by setting d+/D-to load different preset communication levels, respectively, upon identifying that the port provided by the power supply device 11 is the DCP.

The types of the power supply device 11 can be classified into, for example, a normal charge type and a quick charge type. The rapid charging type power supply device can provide a larger output power for the device to be charged than the normal charging type power supply device. The maximum output power of the normal charging type power supply device is, for example, 10W (5V/2A). The quick charge type may be further classified into a first quick charge type and a second quick charge type. The maximum output power of the first quick charge type power supply device is 20W (5V/4A), and the maximum output power of the second quick charge type power supply device is 50W (10V/5A).

When the device to be charged 12 is charged by the power supply device 11, a required charging voltage and/or charging current level may be requested to the power supply device 11 through a communication channel (e.g. through a data line d+/D-) in a USB interface) with the power supply device 11 to meet the charging requirement thereof.

In the related art, a power supply module in a power supply device generally includes a large-volume capacitor for storing energy, and the large-volume capacitor is generally a liquid electrolytic capacitor, and has a large volume, so that the power supply device has a large volume. In particular, the electrolytic capacitance included in the power supply module in the high-power supply device is generally much larger than that included in the power supply module in the low-power supply device. Therefore, the large-power supply device is larger in size, inconvenient to carry and poor in user experience.

Accordingly, the present disclosure provides a power supply device and a charging control method thereof, which can achieve miniaturization of the power supply device on the premise of improving output power.

The power supply device and the charging control method thereof in example embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings and examples.

Referring to fig. 2, the power supply device 11 includes a first power supply module 111, a second power supply module 112, and a charging interface 113.

The first power supply module 111 is configured to convert an alternating current voltage received from an AC port into a first direct current voltage. The first dc voltage may be a constant dc voltage, for example, or may be a pulsating dc voltage.

The output of the second power supply module 112 is connected in series with the output of the first power supply module 111. For example, as shown in fig. 2, the positive output terminal p1+ of the first power supply module 111 is connected to the negative output terminal P2-of the second power supply module 112, the negative output terminal P1-of the first power supply module 111 is connected to the negative output terminal P3-of the charging interface 113, and the positive output terminal p2+ of the second power supply module 112 is connected to the positive output terminal p3+ of the charging interface 113.

Taking a USB interface as an example, the positive output end and the positive input end are VBus in the USB interface, and the negative output end and the negative input end are GND in the USB interface.

It should be noted that the serial connection of the output terminal of the first power supply module 111 and the output terminal of the second power supply module 112 shown in fig. 2 is only an example, and not a limitation of the disclosure. For example, the negative electrode output terminal P1 of the first power supply module 111 may be connected to the positive electrode output terminal p2+ of the second power supply module 112, the positive electrode output terminal p1+ of the first power supply module 111 may be connected to the positive electrode output terminal p3+ of the charging interface 113, and the negative electrode output terminal P2 of the second power supply module 112 may be connected to the negative electrode output terminal P3 of the charging interface 113.

The second power supply module 112 is configured to convert an alternating current voltage received from the AC port into a second direct current voltage. The second dc voltage may also be a constant dc voltage or a pulsating dc voltage.

The charging interface 113 is connected to the first power supply module 111 and the second power supply module 112, respectively, and is configured to provide an output voltage having a voltage value that is a sum of a voltage value of the first dc voltage and a voltage value of the second dc voltage.

Taking the first power supply module 111 as the main power supply module, for example, the voltage value of the first dc voltage and the voltage value of the second dc voltage may be determined by the first power supply module 111, so as to ensure the cooperative work between the first power supply module 111 and the second power supply module 112.

As described above, the electrolytic capacitance included in the power supply module in the high-power supply device is generally much larger than that included in the power supply module in the low-power supply device. According to the power supply device provided by the embodiment of the disclosure, the power supply device can be miniaturized on the premise of improving output power (for example, two power supply modules of 50W are connected in series, and the maximum output power is 100W) by packaging a plurality of small-power supply modules (for example, the power supply modules are below 50W) in series. In addition, the power supply device determines the direct current voltage output by each power supply module by the main power supply module, so that the cooperation among the power supply modules can be ensured.

In addition, each power supply module in the embodiments of the present disclosure may multiplex the structure of an existing power supply module so that it does not require excessive modification in overall hardware performance. And the charging wire can be kept unchanged, reducing the replacement cost of the components/accessories required by the device upgrade.

In the embodiment of fig. 2, taking the power supply device 11 including one second power supply module as an example, for further increasing the output power of the power supply device 11, more second power supply modules, such as two second power supply modules, three power supply modules, and so on, may be packaged in the power supply device 11. The voltage values of the second direct current voltages output by the power supply modules are realized by the first power supply module serving as a main power supply module. The power supply device including the plurality of second power supply modules will be described in detail with reference to fig. 3.

Referring to fig. 3, the second power supply modules 112 in the power supply apparatus 11A include a second power supply module 112A and a second power supply module 112B, respectively.

The output end of the second power supply module 112A and the output end of the second power supply module 112B are respectively connected in series with the output end of the first power supply module 111. For example, as shown in fig. 3, the positive output terminal p1+ of the first power supply module 111 is connected to the negative output terminal P2A-of the second power supply module 112A, the negative output terminal P1-of the first power supply module 111 is connected to the negative output terminal P3-of the charging interface 113, the positive output terminal p2a+ of the second power supply module 112A is connected to the negative output terminal P2B-of the second power supply module 112B, and the positive output terminal p2b+ of the second power supply module 112B is connected to the positive output terminal p3+ of the charging interface 113.

As shown by the power supply device 11A shown in fig. 3, it will be understood by those skilled in the art that when a plurality of second power supply modules are included, it is necessary to connect the last second power supply module connected in series to the tail end with the charging interface so as to realize that the plurality of second power supply modules are connected in series with the first power supply module.

It should be noted that, the connection manner between the output end of the first power supply module 111 and the output end of the second power supply module 112A and the output end of the second power supply module 112B shown in fig. 3 is only an example, and not a limitation of the disclosure. For example, the negative electrode output terminal P1 of the first power supply module 111 may be connected to the positive electrode output terminal p2a+ of the second power supply module 112A, the positive electrode output terminal p1+ of the first power supply module 111 may be connected to the positive electrode output terminal p3+ of the charging interface 113, the negative electrode output terminal P2A of the second power supply module 112A may be connected to the positive electrode output terminal p2b+ of the second power supply module 112B, and the negative electrode output terminal P2B of the second power supply module 112B may be connected to the negative electrode output terminal P3 of the charging interface 113.

Fig. 4 shows another connection between the first power supply module 111 and the second power supply modules 112A and 112B.

In the power supply device 11B shown in fig. 4, the positive output terminal p2a+ of the second power supply module 112A is connected to the positive output terminal p3+ of the charging interface 113, the negative output terminal P2A-of the second power supply module 112A is connected to the positive output terminal p1+ of the first power supply module 111, the negative output terminal P1-of the first power supply module 111 is connected to the positive output terminal p2b+ of the second power supply module 112B, and the negative output terminal P2B-of the second power supply module 112B is connected to the negative output terminal P3-of the charging interface 113.

Referring to fig. 3 or 4, the second power supply module 112A and the second power supply module 112B are respectively configured to convert an alternating current voltage received from the AC port into a second direct current voltage. Each of the second dc voltages may be a constant dc voltage or may be a pulsating dc voltage.

The charging interface 113 is configured to provide an output voltage having a voltage value that is a sum of a voltage value of the first dc voltage and a voltage value of each of the second dc voltages.

The voltage value of the second dc voltage output by the second power supply module 112A and the voltage value of the second dc voltage output by the second power supply module 112B are determined by the first power supply module 111 so as to work in cooperation with the second power supply module 112A and the second power supply module 112B.

In some embodiments, in order to further reduce the volume of the power supply device 11 or 11A or 11B, the first power supply module 111 and the second power supply module 112 thereof may be stacked in the packaging space, or the first power supply module 111, the second power supply module 112A, and the second power supply module 112B thereof may be stacked in the packaging space. For example, taking the power supply device shown in fig. 5A as an example, the power supply device may be stacked in the direction H shown by the arrow to reduce the length in the direction L shown by the arrow, thereby reducing the volume of the power supply device. A specific stacking scheme is shown in fig. 5B. In fig. 5B, taking the first power supply module 111 and the second power supply module 112 as an example, the circuit boards of the first power supply module 111 and the second power supply module 112 are disposed in parallel along the direction H. It should be noted that the power supply device shown in fig. 5A and the above stacking arrangement description are only examples, and not limiting the disclosure. In practical applications, the design of the stacked arrangement may be determined according to practical needs, for example, according to the shape of the practical power supply device.

In some embodiments, the first power supply module 111 may receive a request message sent by the device to be charged 12, and determine the voltage value of the first dc voltage and the voltage value of each second dc voltage according to the request message.

The request message may include, for example, a charging voltage value requested by the device 12 to be charged. Or the request message may also include gear information to be selected by the charging device 12. The gear information may correspond to a charging voltage value, for example. Further, the gear information may be one of a plurality of gear information negotiated in the previous communication process between the device to be charged 12 and the power supply device 11. Each gear information may correspond to a different voltage value (or range) and current value (or range), respectively. For example, the PPS standard may include, for example, 5V/3A, 9V/3A, 3.3-21V/5.5A, etc.

The first power supply module 111 determines the voltage value of the first dc voltage and the voltage value of each second dc voltage from the charging voltage.

In order to realize communication with the device 12 to be charged, for example, taking the charging interface 113 as a USB interface, as shown in fig. 2, the data lines d+/D-and the lines CC1 and CC2 in the charging interface 113 are connected to the first power supply module 111.

Taking the power supply device 11 shown in fig. 2 as an example, it is assumed that the maximum output power of the first power supply module 111 and the second power supply module 111 is 50W (10V/5A).

When the power supply device 11 is connected to the to-be-charged apparatus 12 through a cable, and the to-be-charged apparatus 12 performs the type identification of the power supply device as described above, the power supply device 11 charges the to-be-charged apparatus 12.

If the device 12 to be charged is less than or equal to the first threshold value (for example, 10V) by communicating with the power supply device 11, the first power supply module 111 may determine that the device 12 to be charged is solely powered by the first power supply module, which may be equivalent to determining that the voltage value of the second direct current voltage is 0. At this time, the maximum output power of the power supply device 11 was 50W (10V/5A).

If the charging voltage value requested by the device to be charged 12 from the power supply 11 is greater than the first threshold (e.g. 10V) and less than or equal to the second threshold (e.g. 13.3V), for example, the charging voltage value requested by the device to be charged 12 is 10.1V, the first power supply module 111 may determine that the voltage value of the first dc voltage output by the first power supply module is 6.7V and the voltage value of the second dc voltage output by the second power supply module 112 is 3.4V according to the charging voltage value (the minimum value of the output voltage of the single adapter circuit is 3.3V according to PPS protocol). At this time, the maximum output power of the power supply device 11 is 13.3v×5a=66.5w.

If the charging voltage value requested by the device to be charged 12 from the power supply device 11 is greater than a second threshold (e.g., 13.3V), for example, the charging voltage value requested by the device to be charged 12 is 15V, the first power supply module 111 may determine that the voltage value of the first dc voltage output by the first power supply module is 10V and the voltage value of the second dc voltage output by the second power supply module 112 is 5V according to the charging voltage value. At this time, the maximum output power of the power supply device 11 is 20v×5a=100deg.W.

The battery 122 in the device 12 to be charged may be, for example, a single battery or a cell, or a lithium battery comprising a plurality of cells connected in series with each other. Alternatively, the battery 122 may comprise a plurality of battery cells connected in series, each battery cell being a lithium battery comprising a single cell or comprising a plurality of cells. When the battery 122 includes a plurality of battery cells or a plurality of battery cells, each battery cell or battery cell may be charged separately, or the plurality of battery cells may be charged as a whole.

The following uses the battery 122 as an example, where each battery unit includes a single cell, which illustrates how to use a plurality of battery units in series to increase the charging speed and reduce the heat productivity of the electronic device when charging with a large current.

For an electronic device including a single battery cell, when the single battery cell is charged using a large charging current, a heat generation phenomenon of the electronic device may be serious. In order to ensure the charging speed of the electronic equipment and relieve the heating phenomenon of the electronic equipment in the charging process, the battery structure can be modified, a plurality of battery units which are mutually connected in series are used, and the battery units are directly charged, namely, the voltage output by the adapter is directly loaded to the two ends of each battery unit in the battery units. Compared with a single battery cell scheme (i.e., the capacity of a single battery cell before improvement is considered to be the same as the total capacity of a plurality of battery cells connected in series after improvement), if the same charging speed is to be achieved, the charging current applied to each of the plurality of battery cells is about 1/N (N is the number of battery cells connected in series) of the charging current required by the single battery cell, in other words, the plurality of battery cells connected in series can greatly reduce the magnitude of the charging current on the premise of ensuring the same charging speed, thereby further reducing the heating value of the electronic device in the charging process. Therefore, in order to increase the charging speed and reduce the heat generation amount of the electronic device during the charging process, the electronic device may employ a plurality of battery cells connected in series.

Furthermore, the battery 122 may be, for example, a lithium battery including a plurality of cells connected in parallel with each other, or may include a plurality of battery cells connected in parallel, each of which is a lithium battery including a single or a plurality of cells.

In some embodiments, the first power supply module 111 may further determine the voltage value of the first dc voltage and the voltage value of the second dc voltage according to the cell condition fed back by the device to be charged 12. For example, when the battery 122 in the device to be charged 12 contains only a single battery cell, without requiring a large charging voltage and/or charging current, the first power supply module 111 may then determine to power the device to be charged 12 by itself only, i.e., set the voltage value of the second direct current voltage to 0. When the battery 122 in the device 12 to be charged includes a plurality of battery cells connected in series and requires a large current and/or a high voltage, the first power supply module 111 may supply power to the device 12 to be charged in combination with the second power supply module 112.

The battery may include a trickle charge phase, a constant current charge phase, and a constant voltage charge phase during charging.

In the trickle charge phase, the battery discharged to the preset voltage threshold is pre-charged (i.e. recovered charging), the trickle charge current is usually one tenth of the constant current charge current, and when the voltage of the battery rises above the trickle charge voltage threshold, the charging current is increased to enter the constant current charge phase.

In the constant current charging phase, the battery is charged with a constant current, the battery voltage rises rapidly, and when the battery voltage reaches the voltage threshold (or cut-off voltage) expected by the battery, the constant voltage charging phase is shifted.

In the constant voltage charging phase, the battery is charged at a constant voltage, the charging current gradually decreases, and when the charging current decreases to a set current threshold (the current threshold is typically a fraction of the value of the charging current in the constant current charging phase or less, alternatively, the current threshold may be several tens of milliamperes or less), the battery is fully charged.

In addition, when the battery is fully charged, partial current loss occurs due to the self-discharge effect of the battery, and the battery shifts to the charging phase. During the recharge phase, the charge current is small, simply to ensure that the battery is in a full charge state.

It should be noted that the constant current charging stage mentioned in the embodiments of the present disclosure does not require that the charging current is kept completely constant, and may, for example, refer to that the peak value or the average value of the charging current is kept constant for a period of time.

In practice, the constant current charging stage may also employ a segmented constant current charging (Multi-stage constant current charging) mode for charging.

The segmented constant current charging may have M constant current stages (M is an integer not less than 2), the segmented constant current charging starting the first stage charging at a predetermined charging current, the M constant current stages of the segmented constant current charging being sequentially performed from the first stage to the mth stage. When the voltage of the battery reaches the charging voltage threshold corresponding to the constant current stage, the current can be switched to the next constant current stage. The current conversion process between two adjacent constant current stages can be gradual, or can be stepwise jump.

As can be seen from the above, during the charging process, the charging current is maximum during the constant current charging phase, so that the battery voltage increases rapidly.

In some embodiments, the first power supply module 111 may further determine the voltage value of the first dc voltage and the voltage value of the second dc voltage according to the charging stage in which the device to be charged 12 is fed back. For example, during the trickle charge phase and/or the constant voltage charge phase, the charging voltage and/or the charging current required by the device to be charged is small, so the first power supply module 111 may choose to power the device to be charged 12 by itself only, i.e. determine that the voltage value of the second dc voltage is 0. In the constant current charging phase, however, it may be determined that power is supplied by the second power supply module 112 in combination with it, due to the required charging current and/or charging voltage being relatively large.

Fig. 6A is a schematic structural view of the first power supply module 111 according to an exemplary embodiment.

Referring to fig. 6A, the first power supply module 111 includes a first control unit C1 and a first voltage conversion unit S1.

The first control unit C1 is configured to receive a charging voltage value requested by the device to be charged 12, and determine a voltage value of the first dc voltage and a voltage value of each second dc voltage according to the charging voltage value.

The first control unit C1 may be realized, for example, by a separate micro control unit (Micro Control Unit, MCU).

The first voltage conversion unit S1 is connected to the first control unit C1, and is configured to adjust, according to control of the first control unit C1, a voltage value of the output voltage of the first power supply module 111 to a voltage value of the first dc voltage determined by the first control unit C1.

The first voltage converting unit S1 may comprise, for example, at least one of BUCK, boost, BUCK/Boost, charge pump, or CUK circuit.

It should be noted that the conversion ratio of the charge pump is not limited in the present disclosure, and in practical applications, the conversion ratio may be set according to practical requirements, for example, may be set to 1:1,2:1,3:1, and so on. In addition, when a higher voltage needs to be output, the conversion ratio of the charge pump may also be set to 1:2,1:3, etc. to perform the boosting operation.

Still alternatively, the first voltage converting unit S1 may further include a CUK circuit. The CUK circuit may implement both a boost operation and a buck operation.

Further, as shown in FIG. 6A, the first power supply module 111 may further include a first rectifying circuit R1. The first rectifier circuit R1 is configured to convert an AC voltage received from AC into a dc voltage, such as a pulsating dc voltage.

In addition, in order to obtain a stable dc voltage (e.g., a constant dc voltage), the first power supply module 111 may further include a first filter circuit F1 connected to an output terminal of the first rectifying circuit R1 for filtering the dc voltage output by the first rectifying circuit R1.

The present disclosure is not limited to the specific circuit configuration of the first rectifying circuit R1, and the first rectifying circuit R1 may be, for example, a commonly used rectifying bridge, or may be another circuit capable of performing the function of converting an ac voltage into a dc voltage.

Fig. 6B is a schematic diagram illustrating a structure of the second power supply module 112 according to an exemplary embodiment.

Referring to fig. 6B, the second power supply module 112 (or 112A or 112B) includes a second control unit C2 and a second voltage conversion unit S2.

The second control unit C2 is configured to communicate with the first control unit C1 in the first power supply module 111, and receive a voltage value of the second dc voltage sent by the first control unit C1.

The second control unit C2 may also be realized, for example, by a separate micro control unit (Micro Control Unit, MCU).

The second voltage conversion unit S2 is connected to the second control unit C2, and is configured to adjust, according to control of the second control unit C2, a voltage value of the output voltage of the second power supply module 112 (or 112A or 112B) to a voltage value of the second dc voltage determined by the first control unit C1.

The second voltage converting unit S2 may for example comprise at least one of BUCK, boost, BUCK/Boost, charge pump or CUK circuit.

Still alternatively, the second voltage converting unit S2 may further include a CUK circuit. The CUK circuit may implement both a boost operation and a buck operation.

In addition, as shown in FIG. 6B, the second power supply module 112 (or 112A or 112B) may further include a second rectifying circuit R2. The second rectifier circuit R2 is configured to convert an AC voltage received from the AC into a dc voltage, such as a pulsating dc voltage.

In addition, in order to obtain a stable dc voltage (e.g., a constant dc voltage), the second power supply module 112 (or 112A or 112B) may further include a second filter circuit F2 connected to the output end of the second rectifying circuit R2 for filtering the dc voltage output by the second rectifying circuit R2.

The present disclosure is not limited to the specific circuit configuration of the second rectifying circuit R2, and the second rectifying circuit R2 may be, for example, a rectifier bridge that is generally used, or may be another circuit that can realize the function of converting the ac voltage into the dc voltage.

Fig. 7A is a schematic diagram illustrating another first power supply module 211 according to an exemplary embodiment. Fig. 7B is a schematic diagram illustrating another configuration of the second power supply module 212 according to an exemplary embodiment.

Unlike the first power supply module 111 and the second power supply module 112 shown in fig. 6A and 6B, the first power supply module 211 and the second power supply module 212 shown in fig. 7A and 7B do not need to include the above-described large-volume liquid electrolytic capacitor, so that the volume of the power supply device can be further reduced.

As shown in fig. 7A, the first power supply module 211 includes a first transformation circuit 2111 and a second transformation circuit 2112.

The first conversion circuit 2111 may be, for example, a boost circuit, and is configured to convert a received ac voltage (e.g., a mains supply received from a power grid) into a pulsating dc voltage, where the voltage value of the pulsating dc voltage is higher than the voltage value of the ac voltage.

The voltage range of the pulsating direct current output from the first inverter circuit 2111 is, for example, 390v to 450 v.

The second conversion circuit 2112 is connected to the first conversion circuit 2111, and converts the pulsating dc voltage outputted from the first conversion circuit 2111 to output a constant dc voltage as the first dc voltage.

It will be appreciated by those skilled in the art that the first dc voltage output by the second transformation circuit 2112 is a constant dc voltage with no ripple waveform, but the voltage value of the first dc voltage is not fixed, and different voltage values may be output in different charging scenarios or charging phases.

The first power supply module 211 adopts a two-stage architecture composed of a first conversion circuit and a second conversion circuit. Because the first conversion circuit boosts the input alternating voltage, variable bus voltage exists between the two stages of architectures, and the energy storage function can be realized through the change of the bus voltage, so that a capacitor with a large volume is not required to be used as an energy storage element. Eliminating the bulk capacitance may reduce the volume of the first power module 211.

In some embodiments, the first transformation circuit 2111 may further include at least one capacitor 2113 with a smaller filtering capability (e.g. a capacitor with a capacitance smaller than a preset value or a capacitor with a volume smaller than a preset volume threshold value) for filtering burrs of the pulsating voltage outputted by the first transformation circuit 2111, so as to improve the quality of the output current of the first power supply module 211. The capacitor 2113 may be, for example, a thin film capacitor, a multilayer ceramic capacitor (MLCC), a patch capacitor, or an electrolytic capacitor having a capacity smaller than the above-mentioned predetermined value. The filter capacitor 2113 has a smaller volume and/or capacity, and thus does not have a larger effect on the volume of the first power supply module 211.

The second conversion circuit 2112 may further include a first switching unit 21121 and a transformer 21122.

The first power supply module 211 may further include a control unit 2114 and a first detection unit 2115. The first detection unit 2115 is connected to the transformer 21122 for detecting an output voltage and/or an output current of the transformer 21122. The control unit 2114 is connected to the first detection unit 2115 and the first switching unit 21121, and is configured to output a control signal according to the output voltage and/or the output current of the transformer 21122 detected by the first detection unit 2115, control the on or off of the first switching unit 21121, and adjust the output voltage of the transformer 21122, thereby adjusting the voltage value of the first dc voltage output by the first power supply module 211.

The detected output voltage and/or output current may be a sampled signal of the output voltage and/or output current of the transformer 21122.

The transformer 21122 may couple electrical energy from the primary side to the secondary side in an electromagnetically coupled manner. The electric energy coupled to the secondary side may be extracted from the electric energy output from the first conversion circuit 2111. The manner in which energy is drawn may be controlled by the control unit 2114 based on the detected output voltage and/or output current of the transformer 21122.

In some embodiments, the first detection unit 2115 may also directly detect the output voltage and/or the output current of the first power supply module 211. The control unit 2114 may output a control signal according to the output voltage and/or the output current of the first power supply module 211, control the on or off of the first switching unit 21121, and adjust the output voltage of the transformer 21122, thereby adjusting the voltage value of the first dc voltage output by the first power supply module 211. The output voltage and/or output current may be a sampled signal of the output voltage and/or output current of the first power supply module 211.

In some embodiments, the second transformation circuit 2112 may be implemented, for example, as an LLC resonant transformer.

The control unit 2114 may be implemented, for example, as a Micro Control Unit (MCU). In order for the first power supply module 211 to output the first dc voltage, the control signal output by the control unit 2114 to the first switching unit 21121 includes a pulse frequency modulation (Pulse Frequency Modulation, PFM) signal and a pulse width modulation (Pulse Width Modulation, PWM) signal, which control the on and off of the first switching unit 21121.

Wherein, when outputting the PFM signal, the duty ratio of the PFM signal is kept unchanged, and the PFM signal is controlled by adjusting the interval (i.e. frequency) of the PFM signal. When a PWM signal is output, the frequency of the PWM signal is kept unchanged, and the PWM signal is controlled by adjusting the duty ratio (namely the signal width) of the PWM signal.

The control unit 2114 may determine whether to output the PWM signal or the PFM signal, for example, according to the output voltage and/or the output current of the transformer 21122, or according to the output voltage and/or the output current of the first power supply module 211.

In addition, as shown in fig. 7A, the first power supply module 211 may further include a second detection unit 2116 for detecting an output voltage and/or an output current of the first conversion circuit 2111. The control unit 2114 controls on and off of the switching unit included in the first conversion circuit 2111 by outputting a control signal based on the output voltage and/or the output current detected by the second detection unit 2116, thereby adjusting the output voltage and/or the output current of the first conversion circuit 2111.

As shown in fig. 7B, the second power supply module 212 includes a first conversion circuit 2121 and a second conversion circuit 2122.

The first conversion circuit 2121 may be, for example, a boost circuit, and is configured to convert a received ac voltage (e.g., a mains supply received from a power grid) into a pulsating dc voltage, where the voltage value of the pulsating dc voltage is higher than the voltage value of the ac voltage.

The second conversion circuit 2122 is connected to the first conversion circuit 2121, and converts the pulsating dc voltage outputted from the first conversion circuit 2121 to output a constant dc voltage as the first dc voltage.

It will be appreciated by those skilled in the art that the second dc voltage output by the second conversion circuit 2122 is a constant dc voltage having no ripple waveform, but the voltage value of the second dc voltage is not fixed, and different voltage values may be output in different charging scenarios or charging phases.

The second power supply module 212 adopts a two-stage architecture including a first conversion circuit and a second conversion circuit. Because the first conversion circuit boosts the input alternating voltage, variable bus voltage exists between the two stages of architectures, and the energy storage function can be realized through the change of the bus voltage, so that a capacitor with a large volume is not required to be used as an energy storage element. Removing the bulk capacitance may reduce the volume of the second power module 212.

In some embodiments, the first transforming circuit 2121 may further include at least one capacitor 2123 with a smaller filtering capability (e.g. a capacitor with a capacitance smaller than a preset value or a capacitor with a volume smaller than a preset volume threshold), for filtering burrs of the pulsating voltage outputted by the first transforming circuit 2121, so as to improve the quality of the output current of the second power supply module 212. The capacitor 2123 may be, for example, a thin film capacitor, a multilayer ceramic capacitor (MLCC), a patch capacitor, or an electrolytic capacitor having a capacity smaller than the predetermined value. The filter capacitor 2123 has a smaller volume and/or capacity, and thus does not have a larger effect on the volume of the second power supply module 212.

The second conversion circuit 2122 may further include a first switching unit 21221 and a transformer 21222.

The second power supply module 212 may further include a control unit 2124 and a first detection unit 2125. The first detection unit 2125 is connected to the transformer 21222 for detecting an output voltage and/or an output current of the transformer 21222. The control unit 2124 is connected to the first detection unit 2125 and the first switching unit 21221, and is configured to output a control signal according to the output voltage and/or the output current of the transformer 21222 detected by the first detection unit 2125, control the first switching unit 21221 to turn on or off, and adjust the output voltage of the transformer 21222, so as to adjust the voltage value of the second dc voltage output by the second power supply module 211. Specifically, the control unit 2124 receives the voltage value of the second direct current voltage determined by the control unit 2114 by communicating with the control unit 2114. The control unit 2124 controls the first switching unit 21221 to turn on or off, and adjusts the output voltage of the transformer 21222 to the voltage value of the second dc voltage.

The detected output voltage and/or output current may be a sampled signal of the output voltage and/or output current of the transformer 21222.

The transformer 21222 may electromagnetically couple electrical energy from the primary side to the secondary side. The power coupled to the secondary side may be extracted from the power output by the first conversion circuit 2121. The manner in which energy is drawn may be controlled by the control unit 2124 based on the detected output voltage and/or output current of the transformer 21222.

In some embodiments, the first detection unit 2125 may also directly detect the output voltage and/or the output current of the second power supply module 212. The control unit 2124 may output a control signal according to the output voltage and/or the output current of the second power supply module 212, control the on or off of the first switch unit 21221, and adjust the output voltage of the transformer 21222, thereby adjusting the voltage value of the second dc voltage output by the second power supply module 212. The output voltage and/or output current may be a sampled signal of the output voltage and/or output current of the second power module 212.

In some embodiments, the second conversion circuit 2122 may be implemented, for example, as an LLC resonant converter.

The control unit 2124 may be implemented, for example, as a Micro Control Unit (MCU). In order for the second power supply module 212 to output the second dc voltage, the control signal output by the control unit 2124 to the first switching unit 21221 includes a pulse frequency modulation (Pulse Frequency Modulation, PFM) signal and a pulse width modulation (Pulse Width Modulation, PWM) signal, which control on and off of the first switching unit 21221.

The control unit 2124 may determine whether to output the PWM signal or the PFM signal, for example, according to an output voltage and/or an output current of the transformer 21222, or according to an output voltage and/or an output current of the second power supply module 212.

In addition, as shown in fig. 7B, the second power supply module 212 may further include a second detection unit 2126 for detecting an output voltage and/or an output current of the first conversion circuit 2121. The control unit 2124 controls the on/off of the switching unit included in the first conversion circuit 2121 by outputting a control signal based on the output voltage and/or the output current detected by the second detection unit 2126, thereby adjusting the output voltage and/or the output current of the first conversion circuit 2121.

Fig. 7C is a schematic structural view of still another first power supply module according to an exemplary embodiment. Fig. 7D is a schematic diagram illustrating a structure of still another second power supply module according to an exemplary embodiment.

Unlike the first power supply module 111 and the second power supply module 112 shown in fig. 6A and 6B, the first power supply module 411 and the second power supply module 412 shown in fig. 7C and 7D also do not need to include the above-described large-volume liquid electrolytic capacitor, so that the volume of the power supply device can be further reduced.

As shown in fig. 7C, the first power supply module 411 includes a rectifying module 4111, a filtering module 4112, a transforming module 4113, an operational amplifier module 4114, a first control module 4115, a second control module 4116, and a switching module 4117.

The filtering module 4112 in the embodiment of the disclosure may include a filter C1, where the filter C1 may be a filter capacitor with a capacity smaller than a preset threshold value, and is configured to filter the rectified ac power to obtain the pulsating dc current, the switching module 4117 may be, for example, a switching power supply, the transforming module 4113 may be a transformer as described above, and the first control module 4115 and the second control module 4116 may be implemented as MCUs. In addition, the second control module 4116 may be used as a control unit in the first control module for controlling the second power supply module 412.

Optionally, in some embodiments, the filter capacitor includes a patch capacitor or a film capacitor or an electrolytic capacitor having a capacity less than the preset threshold. The chip capacitor in the embodiment of the disclosure may refer to a multilayer ceramic chip capacitor (Multi-LAYER CERAMIC Capacitors, MLCC), wherein the MLCC is formed by stacking parallel ceramic materials and electrode materials, and the film capacitor may be a capacitor formed by stacking a metal foil as an electrode and a plastic film such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends and winding the stacked metal foil into a cylindrical structure. The filter capacitor in the embodiments of the present disclosure may also be other capacitors, for example, a super capacitor, etc., which is not specifically limited in this disclosure.

In the embodiment of the disclosure, the electrolytic capacitor with large volume used for filtering at the primary side of the traditional adapter is replaced by the filtering capacitor with smaller volume, such as MLLCC capacitor (patch capacitor) or film capacitor, so that the volume of the adapter can be reduced;

After replacing the large-volume electrolytic capacitor, the output of the power supply module is pulsating direct current, not constant direct current, so when the voltage (alternating current voltage input into the power supply module) drops to be very low, the lower the power output by the adapter is, and the conversion efficiency of the adapter is low.

Thus, as shown in fig. 7C, voltage/current sampling is set to sample the voltage after small capacitance filtering. The sampled voltage passes through the op-amp module 4114, where the coefficient of the op-amp module 4114 is K, and the voltage is converted into current. The first control unit 4115 adjusts the on time of the switch module 4117 according to the current fed back by k, so as to limit the power of the conversion module 4113 at low voltage, and reduce the influence on the overall efficiency.

Specifically, when the sampled voltage is lower than a preset value (for example, 100V), the second control module 4116 reduces the peak value of the current flowing through the switching module 4117, so that the on time of the switching tube is reduced, and the power of the power supply when the voltage is lower is reduced, so that the overall output efficiency of the adapter is improved.

As shown in fig. 7D, the second power supply module 412 includes a rectifying module 4121, a filtering module 4122, a transforming module 4123, an operational amplifier module 4124, a first control module 4125, a second control module 4126, and a switching module 4127.

The working principle of the second power supply module 412 is the same as that of the first power supply module 411, and will not be described here again. The second control module 4126 is used as a second control unit in the second power supply module 412, and is configured to communicate with the second control module 4116 in the first power supply module 411, receive the voltage value of the second dc voltage, and control the magnitude of the second dc voltage output by the second power supply module 412 according to the voltage value.

Fig. 7E is a schematic structural view of still another first power supply module according to an exemplary embodiment. Fig. 7F is a schematic structural view of still another second power supply module according to an exemplary embodiment.

Unlike the first power supply module 111 and the second power supply module 112 shown in fig. 6A and 6B, the first power supply module 511 and the second power supply module 512 shown in fig. 7E and 7F also do not need to include the above-described large-volume liquid electrolytic capacitor, so that the volume of the power supply device can be further reduced.

In comparison with the first power supply module 411 and the second power supply module 412 shown in fig. 7C and 7D, the first power supply module 511 and the second power supply module 512 shown in fig. 7E and 7F further include a clamp module 5118 and a clamp module 5128, respectively.

Taking the clamping module 5118 in the first power supply module 511 as an example, the clamping module 5118 may include a capacitor C2, and may absorb all or part of leakage inductance energy of the transformer in the case where the switching module 4117 is turned off. The energy processed by the clamping module 5118 may be input to the output of the transformer for charging the battery.

Due to the clamp module 5118, the hard force of the switching tube included in the switching module 4117 can be reduced, and a switching tube with lower conductivity can be used, so that the cost is reduced, and the conversion efficiency of the power supply module is improved.

It should be appreciated that the clamp module 580 and the switch module 4117 in embodiments of the present disclosure operate in complementary modes, i.e., the clamp module 5118 may be opened when the switch module 4117 is in the closed state, and the clamp module 5118 may be closed when the switch module 4117 is in the open state.

Specifically, when the switch module 4117 is in the closed state, the clamp module 5118 may be opened, in which case, the dc current output after the filter may be subjected to chopping processing by the switch module 4117 and then processed by the conversion module 4113 may be used to charge the battery, when the switch module 4117 is in the open state, the clamp module 5118 may be closed, in which case, part or all of the leakage inductance energy of the transformer may be absorbed by the clamp module 5118, and the clamp module 5118 may release the absorbed energy to the output end of the conversion module 4113 for charging the battery.

The ripple in the embodiments of the present disclosure may be caused by voltage fluctuation of the dc stabilized power supply, because the dc stabilized power supply is generally formed by rectifying and stabilizing the ac power supply, which inevitably carries some ac components in the dc stabilized amount, and such ac components superimposed on the dc stabilized amount are called ripple.

It will be appreciated that although electrolytic capacitors having a capacity less than the preset threshold may generate larger ripple, the adapter may generally be reduced in size and the direct current may be further filtered by a filter, and thus electrolytic capacitors having a capacity less than the preset threshold may also be applied to embodiments of the present disclosure.

Fig. 8 is a schematic structural view of still another power supply apparatus according to an exemplary embodiment. Unlike the power supply device 11 shown in fig. 2, the power supply device 11C shown in fig. 8 further includes a control unit 114.

The control unit 114 is connected to the first power supply module 311 and the second power supply module 312, respectively, and is configured to determine a voltage value of the first dc voltage output by the first power supply module 311 and a voltage value of the second dc voltage output by the second power supply module 312.

That is, unlike the power supply device 11 shown in fig. 2, the power supply device 11C determines the voltage value of the first direct-current voltage and the voltage value of the second direct-current voltage in a unified manner by the control unit 114. Rather than by the first power module 111.

For example, as described above, the control unit 114 may communicate with the device to be charged 12, receive a request message sent by it, which may contain, for example, the charging voltage requested by the device to be charged 12, or contain information of the gear selected by it. As described above, the gear information may correspond to a charging voltage requested by the device 12 to be charged. So that the control unit 114 can determine the voltage value of the first direct voltage and the voltage value of the second direct voltage according to the charging voltage requested by the device 12 to be charged.

If the device to be charged 12 requests the power supply device 11C to have a charging voltage value less than or equal to a first threshold value (for example, 10V) by communicating with the power supply device 11C, the control unit 114 may determine that the device to be charged 12 is individually powered by the first power supply module 311, which may correspond to determining that the voltage value of the second direct current voltage is 0. At this time, the maximum output power of the power supply device 11C was 50W (10V/5A).

If the charging voltage value requested by the device to be charged 12 from the power supply device 11C is greater than the first threshold (e.g., 10V) and less than or equal to the second threshold (e.g., 13.3V), for example, the charging voltage value requested by the device to be charged 12 is 10.1V, the control unit 114 may determine that the voltage value of the first dc voltage output by the first power supply module 311 is 6.7V and the voltage value of the second dc voltage output by the second power supply module 312 is 3.4V (the minimum value of the output voltage of the single adapter circuit is 3.3V according to PPS protocol). At this time, the maximum output power of the power supply device 11C is 13.3v×5a=66.5w.

If the charging voltage value requested by the device to be charged 12 from the power supply device 11C is greater than the second threshold (e.g., 13.3V), for example, the charging voltage value requested by the device to be charged 12 is 15V, the control unit 114 may determine that the voltage value of the first dc voltage output by the first power supply module 311 is 10V and the voltage value of the second dc voltage output by the second power supply module 312 is 5V according to the charging voltage value. At this time, the maximum output power of the power supply device 11C is 20v×5a=100deg.W.

For another example, the control unit 114 may determine the voltage value of the first dc voltage and the voltage value of the second dc voltage according to the information of the battery core condition of the battery of the device to be charged 12, the charging stage of the battery during charging, and the like.

Although one second power supply module 312 is illustrated as an example, a plurality of second power supply modules may be included.

Fig. 9A is a schematic structural view of the first power supply module 311 shown according to an exemplary embodiment. Fig. 9B is a schematic diagram illustrating a structure of the second power supply module 312 according to an exemplary embodiment.

Unlike the first power supply module 211 and the second power supply module 212 shown in fig. 7A and 7B, the control units in the first power supply module 311 and the second power supply module 312 shown in fig. 9A and 9B are the control units 114 described above. The control unit 114 may also be configured to perform the functions of the control unit 2114 and the control unit 2124, respectively, described above.

The same is true for the description of fig. 7A and 7B, and will not be repeated here.

Furthermore, it will be appreciated by those skilled in the art that the first power supply module 311 and the second power supply module 312 may also be implemented as the first power supply module 211 and the second power supply module 212 shown in fig. 7A and 7B, respectively. The control unit 2114 in the first power supply module 211 and the control unit 2124 in the second power supply module 212 control the respective second conversion circuits 2112 and 2122, and are respectively connected to the control unit 114, and respectively receive the voltage value of the first dc voltage and the voltage value of the second dc voltage, which are sent by the control unit 114 and determined by the control unit 114. The control unit 2114 thus controls the first power supply module 211 to output the voltage value of the first dc voltage, and the control unit 2124 controls the second power supply module 212 to output the voltage value of the second dc voltage.

The power supply device 11D shown in fig. 10A is exemplified as including two second power supply modules 112A and 112B. As shown in fig. 10A, the switching unit 114A and the switching unit 114B are connected to the positive output terminal and the negative output terminal of the second power supply module 112A and the second power supply module 112B, respectively.

The respective second control units C2 in the second power supply modules 112A and 112B may also be used to control on or off of the switching units 114A and 114B, respectively.

The switching units 114A and 114B may be implemented as MOS transistors, for example.

As shown in the figure, when the switch unit 114A is turned on, the positive output terminal and the negative output terminal of the second power supply module 112A are shorted, which may be equivalent to the voltage value of the second dc voltage provided by the second power supply module 112A being 0, and when the switch unit 114A is turned off, the second power supply module 112A is connected in series with the first power supply module 111 and the second power supply module 112B.

When the switch unit 114B is turned on, the positive output terminal and the negative output terminal of the second power supply module 112B are shorted, which is equivalent to the voltage value of the second dc voltage provided by the second power supply module 112B being 0, and when the switch unit 114B is turned off, the series connection between the second power supply module 112B and the first power supply module 111, the second power supply module 112A is realized.

The respective second control units C2 in the second power supply module 112A and the second power supply module 112B control on or off of the switching unit 114A or 114B based on the control of the first control unit C1 in the first power supply module 111.

For example, when the second control unit C2 in the second power supply module 112A and/or the second power supply module 112B receives the voltage value of the second dc voltage sent by the first control unit C1 as 0, the switch unit 114A and/or the switch unit 114B connected thereto is controlled to be turned on so as to short-circuit between the positive output terminal and the negative output terminal of the second power supply module 112A and/or the second power supply module 112B, thereby achieving the purpose of making the voltage value of the second dc voltage output by the second power supply module 112A and/or the second power supply module 112B as 0.

In addition, the first control unit C1 may directly send an instruction to turn on or off the switching unit to the second control unit C2.

Fig. 10B is a schematic structural view of still another power supply device according to an exemplary embodiment. Unlike the power supply device shown in fig. 10A, the power supply device 11E shown in fig. 10B controls on and off of each switching unit by the control unit 114. The control unit 114 may control on and off of each switching unit according to the determined voltage value of the first dc voltage and the determined voltage value of the second dc voltage.

For example, when the voltage value of the second dc voltage is determined to be 0, the control unit 114 controls the switching unit 314A and/or the switching unit 314B to be turned on so as to short-circuit between the positive output terminal and the negative output terminal of the second power supply module 312A and/or the second power supply module 312B, thereby achieving the purpose of making the voltage value of the second dc voltage output by the second power supply module 312A and/or the second power supply module 312B be 0.

Although fig. 10A and 10B illustrate an example in which two second power supply modules are included, the switching unit thereof may be correspondingly applied to a power supply apparatus including one second power supply module, three second power supply modules, four second power supply modules, and the like. The power supply modules are connected in series with the first power supply module and the other second power supply modules through the respective connected switch units.

In the embodiment of the disclosure, the switch unit is connected between the positive output end and the negative output end of the second power supply module, and the purpose of shorting the corresponding second power supply module can be achieved by controlling the on and off of the switch unit, so that the structure is simple.

The following is a method embodiment of the present disclosure, and may be applied to an embodiment of the apparatus of the present disclosure. For details not disclosed in the method embodiments of the present disclosure, please refer to the apparatus embodiments of the present disclosure.

Fig. 11 is a flowchart illustrating a charge control method according to an exemplary embodiment. The charge control method can be applied to the power supply device 11 (or 11A, 11B, 11D) described above, for example.

Referring to fig. 11, the charge control method 10 includes:

In step S102, the received ac voltage is converted into a first dc voltage by a first power supply module in the power supply device.

In step S104, the received ac voltage is converted into a second dc voltage by the second power supply module of the power supply device.

In step S106, an output voltage having a voltage value equal to a sum of the voltage value of the first dc voltage and the voltage value of the second dc voltage is provided through the charging interface of the power supply device.

The voltage value of the second voltage is determined by the first power supply module, and the number of the second power supply modules is at least one.

According to the charging control method provided by the embodiment of the disclosure, the power supply device packaged with the plurality of power supply modules connected in series is used for determining the direct-current voltage output by each power supply module by the main power supply module, so that the power supply module can work cooperatively to provide higher output power. Furthermore, the power supply device can be miniaturized on the premise of improving the output power.

Fig. 12 is a flowchart illustrating another charge control method according to an exemplary embodiment. Unlike the charge control method 10 shown in fig. 11, the charge control method 20 shown in fig. 12 further includes:

in step S202, a request message sent by an electronic device connected to a power supply apparatus is received by a first control unit in a first power supply module.

In step S204, the voltage value of the first dc voltage and the voltage value of each second dc voltage are determined by the first control unit according to the request message.

In some embodiments, the request message includes a charging voltage value requested by the electronic device, or the request message includes gear information selected by the electronic device, where the gear information is one of a plurality of gear information negotiated by the electronic device and the power supply device, and each of the gear information corresponds to a different voltage range and a different current range. The method for determining the voltage value of the first direct current voltage and the voltage value of each second direct current voltage through the first control unit according to the request message comprises the step of determining the voltage value of the first direct current voltage and the voltage value of the second direct current voltage through the first control unit according to the charging voltage value corresponding to the gear information.

In some embodiments, determining, by the first control unit, the voltage value of the first direct current voltage and the voltage value of the second direct current voltage from the charge voltage value includes determining, by the first control unit, the voltage value of the second direct current voltage to be 0 when the charge voltage value is less than or equal to a first threshold value, determining, by the first control unit, the voltage value of the first direct current voltage to be a first voltage value when the charge voltage value is greater than the first threshold value and less than or equal to a second threshold value, the voltage value of the second current voltage to be a difference between the charge voltage value and the first voltage value, and determining, by the first control unit, the voltage value of the first direct current voltage to be a second voltage value when the charge voltage value is greater than the second threshold value, the voltage value of the second current voltage to be a difference between the charge voltage value and the second voltage value, wherein the second voltage value is greater than the first voltage value.

Fig. 13 is a flowchart illustrating yet another charge control method according to an exemplary embodiment. Unlike the charge control method 20 shown in fig. 12, the charge control method shown in fig. 13 further provides one embodiment of step S102.

As shown in fig. 13, step S102 includes:

in step S1022, the voltage value of the output voltage of the first power supply module is adjusted to the voltage value of the first dc voltage by the first voltage conversion unit in the first power supply module according to the control of the first control unit.

In some embodiments, the step S102 may also include converting the received AC voltage into a first pulsating DC voltage by a first conversion circuit in the first power supply module, the first pulsating DC voltage having a voltage value higher than that of the AC voltage, and converting the first pulsating DC voltage by a second conversion circuit in the second power supply module to output the first DC voltage.

In some embodiments, the first pulsating direct current voltage is converted through a second conversion circuit in the second power supply module, and the first direct current voltage is output, wherein the first pulsating direct current voltage comprises an output voltage value and/or a current value of a first transformation unit in the second conversion circuit detected through a first detection unit in the first power supply module, and the first switching unit in the second conversion circuit is controlled to be turned on or off through an output control signal according to the output voltage value and/or the current value of the first transformation unit detected through a first control unit, so that the voltage value of the output voltage of the first transformation unit is adjusted to be the voltage value of the first direct current voltage.

Fig. 14 is a flowchart illustrating yet another charge control method according to an exemplary embodiment. Unlike the charge control method 20 shown in fig. 12, the charge control method shown in fig. 14 further provides one embodiment of step S104.

As shown in fig. 14, step S104 includes:

In step S1042, a voltage value of the second dc voltage sent by the first control unit is received by the second control unit in the second power supply module.

In step S1044, the output voltage of the second power supply module is adjusted to the voltage value of the second dc voltage by the second voltage conversion unit in the second power supply module according to the control of the second control unit.

In some embodiments, the step S104 may also include converting the received AC voltage into a second pulsating DC voltage by a third conversion circuit in the second power supply module, the second pulsating DC voltage having a voltage value higher than the AC voltage, and converting the second pulsating DC voltage by a fourth conversion circuit in the second power supply module to output the second DC voltage.

In some embodiments, the second pulsating direct current voltage is converted by a fourth conversion circuit in the second power supply module, and the second direct current voltage is output, wherein the second pulsating direct current voltage comprises an output voltage value and/or a current value of a second transformation unit in the fourth conversion circuit detected by a second detection circuit in the second power supply module, the voltage value of the second direct current voltage sent by the first control unit is received by the second control unit in the second power supply module, and the output control signal controls the second switch in the fourth conversion circuit to be turned on or off according to the output voltage value and/or the current value of the second transformation unit detected by the second detection unit, and the voltage value of the output voltage of the second transformation unit is adjusted to be the voltage value of the second direct current voltage.

Fig. 15 is a flowchart illustrating yet another charge control method according to an exemplary embodiment. The charge control method 30 shown in fig. 15 is applicable to the power supply device 11D described above. Unlike the charge control method 20 shown in fig. 12, the charge control method 30 shown in fig. 15 further includes:

In step S302, the on or off of the third switching unit connected between the positive output terminal and the negative output terminal of the second power supply module is controlled by the second control unit based on the control of the first power supply module.

Fig. 16 is a flowchart illustrating yet another charge control method according to an exemplary embodiment. Unlike the charge control method 30 shown in fig. 15, the charge control method shown in fig. 16 further provides one embodiment of step S302.

As shown in fig. 16, step S302 includes:

in step S3022, when the voltage value of the second dc voltage sent by the first control unit is 0 or when the first control instruction sent by the first control unit is received, the third switch unit connected is controlled to be turned on, so as to short-circuit between the positive output terminal and the negative output terminal of the second power supply module.

Fig. 17 is a flowchart illustrating yet another charge control method according to an exemplary embodiment. The charge control method can be applied to the power supply device 11C (or 11E) described above, for example.

Referring to fig. 11, the charge control method 40 includes:

In step S402, the received ac voltage is converted into a first dc voltage by a first power supply module in the power supply device.

In step S404, the received ac voltage is converted into a second dc voltage by a second power supply module in the power supply device.

In step S406, the voltage value of the first direct current voltage and the voltage value of the second direct current voltage are determined by a control unit in the power supply device.

In step S408, an output voltage having a voltage value equal to a sum of the voltage value of the first dc voltage and the voltage value of the second dc voltage is provided through the charging interface of the power supply device.

Wherein the number of the second power supply modules is at least one.

In some embodiments, the charging control method 40 may further include receiving, by the control unit, a request message transmitted by an electronic device connected to the power supply apparatus, and determining, by the control unit, a voltage value of the first direct current voltage and a voltage value of the second direct current voltage according to the request message.

In some embodiments, the request message includes a charging voltage value requested by the electronic device and determining, by the control unit, a voltage value of the first direct voltage and a voltage value of the second direct voltage from the request message includes determining, by the control unit, the voltage value of the first direct voltage and the voltage value of the second direct voltage from the charging voltage value.

In some embodiments, the request message comprises gear information selected by the electronic device, and the determination of the voltage value of the first direct current voltage and the voltage value of the second direct current voltage by the control unit according to the request message comprises the determination of the voltage value of the first direct current voltage and the voltage value of the second direct current voltage by the control unit according to the charging voltage value corresponding to the gear information, wherein the gear information is one of a plurality of gear information negotiated by the electronic device and the power supply device, and each gear information corresponds to a different voltage range and a different current range respectively.

In some embodiments, step S406 includes determining, by the control unit, that the voltage value of the second DC voltage is 0 when the charge voltage value is less than or equal to the first threshold value, determining, by the control unit, that the voltage value of the first DC voltage is a first voltage value when the charge voltage value is greater than the first threshold value and less than or equal to the second threshold value, that the voltage value of the second DC voltage is a difference between the charge voltage value and the first voltage value, and determining, by the control unit, that the voltage value of the first DC voltage is a second voltage value when the charge voltage value is greater than the second threshold value, that the voltage value of the second DC voltage is a difference between the charge voltage value and the second voltage value, wherein the second voltage value is greater than the first voltage value.

In some embodiments, step S402 includes converting, by a first conversion circuit in a first power supply module, the received AC voltage to a first pulsating DC voltage having a voltage value higher than a voltage value of the AC voltage, and converting, by a second conversion circuit in a second power supply module, the first pulsating DC voltage to output the first DC voltage.

In some embodiments, the first pulsating direct current voltage is converted by a second conversion circuit in the second power supply module, and the first direct current voltage is output, and the method comprises the steps of detecting an output voltage value and/or a current value of a first transformation unit in the second conversion circuit by a first detection unit in the first power supply module, controlling on or off of a first switch unit in the second conversion circuit by a control unit according to the output voltage value and/or the current value of the first transformation unit detected by the first detection unit, and adjusting the voltage value of the output voltage of the first transformation unit to be the voltage value of the first direct current voltage.

In some embodiments, step S404 includes converting the received AC voltage to a second pulsating DC voltage via a third conversion circuit in the second power supply module, the second pulsating DC voltage having a voltage value higher than the AC voltage, and converting the second pulsating DC voltage via a fourth conversion circuit in the second power supply module to output the second DC voltage.

In some embodiments, the second pulsating direct current voltage is converted by a fourth conversion circuit in the second power supply module, and the second direct current voltage is output, wherein the method comprises the steps of detecting an output voltage value and/or a current value of a second transformation unit in the fourth conversion circuit by a second detection circuit in the second power supply module, and controlling a second switch in the fourth conversion circuit to be turned on or off by an output control signal according to the output voltage value and/or the current value of the second transformation unit detected by the second detection unit through a control unit, so that the voltage value of the output voltage of the second transformation unit is adjusted to be the voltage value of the second direct current voltage.

In some embodiments, the charge control method 40 further includes controlling, by the control unit, on or off of a third switching unit connected between the positive output terminal and the negative output terminal of the second power supply module.

In some embodiments, controlling, by the control unit, on or off of a third switching unit connected between the positive output terminal and the negative output terminal of the second power supply module includes controlling, by the control unit, on of the connected third switching unit to short-circuit between the positive output terminal and the negative output terminal of the second power supply module when the voltage value of the second direct current voltage is determined to be 0.

It is noted that the above-described figures are merely schematic illustrations of processes involved in a method according to exemplary embodiments of the present disclosure, and are not intended to be limiting. It will be readily appreciated that the processes shown in the above figures do not indicate or limit the temporal order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, among a plurality of modules.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the disclosure is not to be limited to the details of construction, arrangement or method of implementation described herein, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A power supply device, comprising:

A first power supply module, used for converting the received AC voltage into a first DC voltage;

a second power supply module, the output end of which is connected in series with the output end of the first power supply module, and is used to convert the received AC voltage into a second DC voltage; the number of the second power supply module is at least one; and

a charging interface, connected to the first power supply module and the second power supply module respectively, and used to provide an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage value of the second DC voltage;

The voltage value of the second DC voltage is determined by the first power supply module; the second DC voltage is a constant DC voltage or a pulsating DC voltage;

The first power supply module is further used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the battery cell status fed back by the device to be charged, and to set the voltage value of the second DC voltage to 0 when the battery of the device to be charged contains only a single battery cell, and to charge the device to be charged in conjunction with the second power supply module when the battery of the device to be charged contains multiple batteries connected in series;

Alternatively, the first power supply module is also used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging stage fed back by the device to be charged, and to set the voltage value of the second DC voltage to 0 when the device to be charged is in the trickle charging stage and/or the constant voltage charging stage, and to charge the device to be charged in conjunction with the second power supply module when the device to be charged is in the constant current charging stage.

2. The power supply device according to claim 1 is characterized in that the first power supply module includes: a first control unit, used to receive a request message sent by an electronic device connected to the power supply device, and determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message.

3. The power supply device according to claim 2 is characterized in that the request message includes: a charging voltage value requested by the electronic device; and the first control unit is used to determine a voltage value of the first DC voltage and a voltage value of the second DC voltage according to the charging voltage value.

4. The power supply device according to claim 2 is characterized in that the request message includes: the gear information selected by the electronic device; the first control unit is used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value corresponding to the gear information; wherein the gear information is one of a plurality of gear information negotiated between the electronic device and the power supply device, and each gear information corresponds to a different voltage range and current range.

5 . The power supply device according to claim 3 , wherein the first control unit is configured to determine that the voltage value of the second DC voltage is 0 when the charging voltage value is less than or equal to a first threshold value.

6. The power supply device according to claim 5 is characterized in that the first control unit is also used to determine that the voltage value of the first DC voltage is a first voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the first voltage value when the charging voltage value is greater than the first threshold and less than or equal to a second threshold.

7. The power supply device according to claim 6 is characterized in that the first control unit is also used to determine that the voltage value of the first DC voltage is a second voltage value when the charging voltage value is greater than the second threshold value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the second voltage value; wherein the second voltage value is greater than the first voltage value.

8. The power supply device according to claim 2 is characterized in that the first power supply module also includes: a first voltage conversion unit, connected to the first control unit, and used to adjust the voltage value of the output voltage of the first power supply module to the voltage value of the first DC voltage according to the control of the first control unit.

9. The power supply device according to claim 8 is characterized in that the second power supply module includes: a second control unit and a second voltage conversion unit; wherein the second control unit is used to communicate with the first control unit and receive the voltage value of the second DC voltage sent by the first control unit; the second voltage conversion unit is connected to the second control unit and is used to adjust the output voltage of the second power supply module to the voltage value of the second DC voltage according to the control of the second control unit.

10. The power supply device according to claim 2 is characterized in that the first power supply module also includes: a first conversion circuit and a second conversion circuit; wherein the first conversion circuit is used to convert the received AC voltage into a first pulsating DC voltage, and the voltage value of the first pulsating DC voltage is higher than the voltage value of the AC voltage; the second conversion circuit is connected to the first conversion circuit, and is used to convert the first pulsating DC voltage and output the first DC voltage.

11. The power supply device according to claim 10 is characterized in that the second conversion circuit includes: a first switch unit and a first transformer unit; the first power supply module also includes: a first detection unit, connected to the first transformer unit, for detecting the output voltage value and/or current value of the first transformer unit; the first control unit is respectively connected to the first detection unit and the first switch unit, and is also used to control the first switch unit to be turned on or off by outputting a control signal according to the output voltage value and/or current value of the first transformer unit detected by the first detection unit, so as to adjust the voltage value of the output voltage of the first transformer unit to the voltage value of the first DC voltage.

12. The power supply device according to claim 11 is characterized in that the second power supply module includes: a third conversion circuit and a fourth conversion circuit; wherein the third conversion circuit is used to convert the received AC voltage into a second pulsating DC voltage, and the voltage value of the second pulsating DC voltage is higher than the voltage value of the AC voltage; the fourth conversion circuit is respectively connected to the second control unit and the third conversion circuit, and is used to convert the second pulsating DC voltage and output the second DC voltage.

13. The power supply device according to claim 12 is characterized in that the fourth conversion circuit includes: a second switch unit and a second transformer unit; the second power supply module also includes: a second control unit and a second detection unit; wherein the second detection unit is connected to the second transformer unit, and is used to detect the output voltage value and/or current value of the second transformer unit; the second control unit is respectively connected to the second detection unit and the second switch unit, and is used to communicate with the first control unit and receive the voltage value of the second DC voltage sent by the first control unit; and according to the output voltage value and/or current value of the second transformer unit detected by the second detection unit, the second switch unit is controlled to be turned on or off by outputting a control signal, and the voltage value of the output voltage of the second transformer unit is adjusted to the voltage value of the second DC voltage.

14. The power supply device according to claim 9 or 13 is characterized in that a third switch unit is connected between the positive output terminal and the negative output terminal of the second power supply module; the second control unit is also connected to the third switch unit, and the second control unit is also used to control the conduction or shutdown of the third switch unit based on the control of the first power supply module.

15. The power supply device according to claim 14 is characterized in that the second control unit of the second power supply module is also used to control the connected third switch unit to be turned on when the voltage value of the second DC voltage sent by the first control unit is 0, or when the first control instruction sent by the first control unit is received, so as to short-circuit the positive output terminal and the negative output terminal of the second power supply module.

16. The power supply device according to any one of claims 1 to 4, characterized in that the negative input terminal of the charging interface is connected to the negative output terminal of the first power supply module, and the positive input terminal of the charging interface is connected to the positive output terminal of the second power supply module;

Alternatively, the positive input terminal of the charging interface is connected to the positive output terminal of the first power supply module, and the negative input terminal of the charging interface is connected to the negative output terminal of the second power supply module.

17. The power supply device according to any one of claims 1 to 4, characterized in that when it includes multiple second power supply modules, the positive input terminal of the charging interface is connected to the positive output terminal of one of the multiple second power supply modules, and the negative input terminal of the charging interface is connected to the negative output terminal of another one of the multiple second power supply modules.

18 . The power supply device according to claim 1 , wherein the first power supply module and the second power supply module are stacked up and down in the power supply device.

19. A power supply device, comprising:

A second power supply module, wherein the output end of the second power supply module is connected in series with the output end of the first power supply module, and is used to convert the received AC voltage into a second DC voltage; the number of the second power supply module is at least one;

a charging interface, connected to the first power supply module and the second power supply module respectively, and configured to provide an output voltage having a voltage value that is a sum of a voltage value of the first DC voltage and a voltage value of the second DC voltage; and

a control unit, connected to the first power supply module and the second power supply module respectively, and used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage; the second DC voltage is a constant DC voltage or a pulsating DC voltage;

The control unit is further used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the battery cell status fed back by the device to be charged, and to set the voltage value of the second DC voltage to 0 when the battery of the device to be charged contains only a single battery cell, and to charge the device to be charged in conjunction with the second power supply module when the battery of the device to be charged contains multiple batteries connected in series;

Alternatively, the control unit is further used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging stage fed back by the device to be charged, set the voltage value of the second DC voltage to 0 when the device to be charged is in the trickle charging stage and/or the constant voltage charging stage, and charge the device to be charged in combination with the second power supply module when the device to be charged is in the constant current charging stage.

20. The power supply device according to claim 19, characterized in that the control unit is further used to receive a request message sent by an electronic device connected to the power supply device, and determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message.

21. The power supply device according to claim 20 is characterized in that the request message includes: a charging voltage value requested by the electronic device; and the control unit is used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value.

22. The power supply device according to claim 20 is characterized in that the request message includes: the gear information selected by the electronic device; the control unit is used to determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value corresponding to the gear information; wherein the gear information is one of a plurality of gear information negotiated between the electronic device and the power supply device, and each gear information corresponds to a different voltage range and current range.

23. The power supply device according to claim 21 or 22 is characterized in that the control unit is used to determine that the voltage value of the second DC voltage is 0 when the charging voltage value is less than or equal to a first threshold value; when the charging voltage value is greater than the first threshold value and less than or equal to a second threshold value, determine that the voltage value of the first DC voltage is a first voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the first voltage value; when the charging voltage value is greater than the second threshold value, determine that the voltage value of the first DC voltage is a second voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the second voltage value; wherein the second voltage value is greater than the first voltage value.

24. The power supply device according to claim 20 is characterized in that the first power supply module includes: a first conversion circuit and a second conversion circuit; wherein the first conversion circuit is used to convert the received AC voltage into a first pulsating DC voltage, and the voltage value of the first pulsating DC voltage is higher than the voltage value of the AC voltage; the second conversion circuit is connected to the first conversion circuit, and is used to convert the first pulsating DC voltage and output the first DC voltage.

25. The power supply device according to claim 24 is characterized in that the second conversion circuit includes: a first switch unit and a first transformer unit; the first power supply module also includes: a first detection unit, connected to the first transformer unit, and used to detect the output voltage value and/or current value of the first transformer unit; the control unit is respectively connected to the first detection unit and the first switch unit, and is also used to control the first switch unit to be turned on or off by outputting a control signal according to the output voltage value and/or current value of the first transformer unit detected by the first detection unit, so as to adjust the voltage value of the output voltage of the first transformer unit to the voltage value of the first DC voltage.

26. The power supply device according to claim 25 is characterized in that the second power supply module includes: a third conversion circuit and a fourth conversion circuit; wherein the third conversion circuit is used to convert the received AC voltage into a second pulsating DC voltage, and the voltage value of the second pulsating DC voltage is higher than the voltage value of the AC voltage; the fourth conversion circuit is respectively connected to the control unit and the third conversion circuit, and is used to convert the second pulsating DC voltage and output the second DC voltage.

27. The power supply device according to claim 26 is characterized in that the fourth conversion circuit includes: a second switch unit and a second transformer unit; the first power supply module also includes: a second detection unit; wherein the second detection unit is connected to the second transformer unit, and is used to detect the output voltage value and/or current value of the second transformer unit; the control unit is respectively connected to the second detection unit and the second switch unit, and is also used to control the second switch unit to be turned on or off by outputting a control signal according to the output voltage value and/or current value of the second transformer unit detected by the second detection unit, so as to adjust the voltage value of the output voltage of the second transformer unit to the voltage value of the second DC voltage.

28. The power supply device according to any one of claims 24-27 is characterized in that a third switch unit is connected between the positive output terminal and the negative output terminal of the second power supply module; the control unit is also connected to the third switch unit, and the control unit is also used to control the conduction or shutdown of the switch unit.

29. The power supply device according to claim 28 is characterized in that the control unit is also used to control the connected third switch unit to be turned on when it is determined that the voltage value of the second DC voltage is 0, so as to short-circuit the positive output terminal and the negative output terminal of the second power supply module.

30. The power supply device according to any one of claims 19 to 22, characterized in that the negative input terminal of the charging interface is connected to the negative output terminal of the first power supply module, and the positive input terminal of the charging interface is connected to the positive output terminal of the second power supply module;

31. A power supply device according to any one of claims 19-22, characterized in that, when it includes multiple second power supply modules, the positive input terminal of the charging interface is connected to the positive output terminal of one of the multiple second power supply modules, and the negative input terminal of the charging interface is connected to the negative output terminal of another one of the multiple second power supply modules.

32. The power supply device according to any one of claims 19 to 22, characterized in that the first power supply module and the second power supply module are stacked up and down in the power supply device.

33. A charging control method, applied to a power supply device, characterized by comprising:

The received AC voltage is converted into a first DC voltage by a first power supply module in the power supply device;

The received AC voltage is converted into a second DC voltage by a second power supply module of the power supply device; and

Providing, through the charging interface of the power supply device, an output voltage whose voltage value is the sum of the voltage value of the first DC voltage and the voltage value of the second DC voltage;

The voltage value of the second DC voltage is determined by the first power supply module; the number of the second power supply module is at least one; the second DC voltage is a constant DC voltage or a pulsating DC voltage;

Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage by the first power supply module in the power supply device includes:

Determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the battery cell status fed back by the device to be charged, set the voltage value of the second DC voltage to 0 when the battery of the device to be charged contains only a single battery cell, and charge the device to be charged in conjunction with the second power supply module when the battery of the device to be charged contains multiple battery cells connected in series;

Determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging stage fed back by the device to be charged, set the voltage value of the second DC voltage to 0 when the device to be charged is in the trickle charging stage and/or the constant voltage charging stage, and charge the device to be charged in combination with the second power supply module when the device to be charged is in the constant current charging stage.

34. The charging control method according to claim 33, further comprising:

Receiving, by a first control unit in the first power supply module, a request message sent by an electronic device connected to the power supply device; and

The first control unit determines a voltage value of the first DC voltage and a voltage value of the second DC voltage according to the request message.

35. The charging control method according to claim 34, characterized in that the request message comprises: a charging voltage value requested by the electronic device;

Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message by the first control unit includes: determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value by the first control unit.

36. The charging control method according to claim 34, characterized in that the request message includes: gear information selected by the electronic device;

Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message by the first control unit, including: determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value corresponding to the gear information by the first control unit;

The gear information is one of a plurality of gear information negotiated between the electronic device and the power supply device, and each gear information corresponds to a different voltage range and current range.

37. The charging control method according to claim 35 or 36, characterized in that determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value by the first control unit comprises:

When the charging voltage value is less than or equal to a first threshold value, determining, by the first control unit, that the voltage value of the second DC voltage is 0;

When the charging voltage value is greater than the first threshold value and less than or equal to the second threshold value, the first control unit determines that the voltage value of the first DC voltage is a first voltage value, and the voltage value of the second DC voltage is a difference between the charging voltage value and the first voltage value;

When the charging voltage value is greater than the second threshold value, the first control unit determines that the voltage value of the first DC voltage is a second voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the second voltage value;

Wherein, the second voltage value is greater than the first voltage value.

38. The charging control method according to claim 34, characterized in that the received AC voltage is converted into a first DC voltage by a first power supply module in the power supply device, comprising:

Through the first voltage conversion unit in the first power supply module, according to the control of the first control unit, the voltage value of the output voltage of the first power supply module is adjusted to the voltage value of the first DC voltage.

39. The charging control method according to claim 38, characterized in that the received AC voltage is converted into a second DC voltage by the second power supply module of the power supply device, comprising:

receiving, through a second control unit in the second power supply module, a voltage value of the second DC voltage sent by the first control unit;

Through the second voltage conversion unit in the second power supply module, according to the control of the second control unit, the output voltage of the second power supply module is adjusted to the voltage value of the second DC voltage.

40. The charging control method according to claim 34, characterized in that the received AC voltage is converted into a first DC voltage by a first power supply module in the power supply device, comprising:

The received AC voltage is converted into a first pulsating DC voltage by a first conversion circuit in the first power supply module, wherein a voltage value of the first pulsating DC voltage is higher than a voltage value of the AC voltage;

The first pulsating DC voltage is converted by a second conversion circuit in the second power supply module to output the first DC voltage.

41. The charging control method according to claim 40, characterized in that the first pulsating DC voltage is converted by a second conversion circuit in the second power supply module to output the first DC voltage, comprising:

Detecting an output voltage value and/or current value of a first voltage conversion unit in the second conversion circuit by a first detection unit in the first power supply module;

The first control unit controls the first switch unit in the second conversion circuit to be turned on or off by outputting a control signal based on the output voltage value and/or current value of the first transformer unit detected by the first detection unit, and adjusts the voltage value of the output voltage of the first transformer unit to the voltage value of the first DC voltage.

42. The charging control method according to claim 41, characterized in that the received AC voltage is converted into a second DC voltage by the second power supply module of the power supply device, comprising:

The received AC voltage is converted into a second pulsating DC voltage by a third conversion circuit in the second power supply module, wherein a voltage value of the second pulsating DC voltage is higher than a voltage value of the AC voltage;

The second pulsating DC voltage is converted by a fourth conversion circuit in the second power supply module to output the second DC voltage.

43. The charging control method according to claim 42, characterized in that the second pulsating DC voltage is converted by a fourth conversion circuit in the second power supply module to output the second DC voltage, comprising:

Detecting an output voltage value and/or current value of a second voltage conversion unit in the fourth conversion circuit by a second detection unit in the second power supply module;

The second control unit in the second power supply module communicates with the first control unit to receive the voltage value of the second DC voltage sent by the first control unit; and according to the output voltage value and/or current value of the second transformer unit detected by the second detection unit, an output control signal controls the second switch in the fourth conversion circuit to be turned on or off, and adjusts the voltage value of the output voltage of the second transformer unit to the voltage value of the second DC voltage.

44. The charging control method according to claim 39 or 43, further comprising:

The second control unit controls the on or off of the third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module based on the control of the first power supply module.

45. The charging control method according to claim 44, characterized in that the second control unit controls the on or off of the third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module based on the control of the first power supply module, comprising:

Through the second control unit, when the voltage value of the second DC voltage sent by the first control unit is 0, or when the first control instruction sent by the first control unit is received, the connected third switch unit is controlled to be turned on to short-circuit the positive output terminal and the negative output terminal of the second power supply module.

46. A charging control method, applied to a power supply device, characterized by comprising:

Converting the received AC voltage into a first DC voltage by a first power supply module in the power supply device;

The received AC voltage is converted into a second DC voltage by a second power supply module in the power supply device;

Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage by a control unit in the power supply device;

The number of the second power supply module is at least one; the second DC voltage is a constant DC voltage or a pulsating DC voltage;

Determine the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the battery cell status fed back by the device to be charged through the first power supply module in the power supply providing device, set the voltage value of the second DC voltage to 0 when the battery of the device to be charged contains only a single battery cell, and charge the device to be charged in conjunction with the second power supply module when the battery of the device to be charged contains multiple battery cells connected in series;

Or, through the first power supply module in the power supply providing device, the voltage value of the first DC voltage and the voltage value of the second DC voltage are determined according to the charging stage fed back by the device to be charged, and the voltage value of the second DC voltage is set to 0 when the device to be charged is in the trickle charging stage and/or the constant voltage charging stage, and when the device to be charged is in the constant current charging stage, the second power supply module is used together to charge the device to be charged.

47. The charging control method according to claim 46, further comprising:

Receiving, by the control unit, a request message sent by an electronic device connected to the power supply device;

The control unit determines a voltage value of the first DC voltage and a voltage value of the second DC voltage according to the request message.

48. The charging control method according to claim 47, wherein the request message comprises: a charging voltage value requested by the electronic device;

Determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message by the control unit includes: determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value by the control unit.

49. The charging control method according to claim 47, wherein the request message comprises: information on the gear selected by the electronic device;

The control unit determines the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the request message, including: the control unit determines the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value corresponding to the gear information; wherein the gear information is one of a plurality of gear information negotiated between the electronic device and the power supply device, and each gear information corresponds to a different voltage range and current range.

50. The charging control method according to claim 48 or 49, characterized in that determining the voltage value of the first DC voltage and the voltage value of the second DC voltage according to the charging voltage value by the control unit comprises:

When the charging voltage value is less than or equal to a first threshold value, determining, by the control unit, that the voltage value of the second DC voltage is 0;

When the charging voltage value is greater than the first threshold value and less than or equal to the second threshold value, the control unit determines that the voltage value of the first DC voltage is a first voltage value, and the voltage value of the second DC voltage is a difference between the charging voltage value and the first voltage value;

When the charging voltage value is greater than the second threshold value, the control unit determines that the voltage value of the first DC voltage is a second voltage value, and the voltage value of the second DC voltage is the difference between the charging voltage value and the second voltage value;

Wherein, the second voltage value is greater than the first voltage value.

51. The charging control method according to claim 47, characterized in that the received AC voltage is converted into a first DC voltage by a first power supply module in the power supply device, comprising:

52. The charging control method according to claim 51, characterized in that the first pulsating DC voltage is converted by a second conversion circuit in the second power supply module to output the first DC voltage, comprising:

The control unit controls the first switch unit in the second conversion circuit to be turned on or off by outputting a control signal based on the output voltage value and/or current value of the first transformer unit detected by the first detection unit, and adjusts the voltage value of the output voltage of the first transformer unit to the voltage value of the first DC voltage.

53. The charging control method according to claim 52, characterized in that the received AC voltage is converted into a second DC voltage by the second power supply module of the power supply device, comprising:

54. The charging control method according to claim 53, characterized in that the second pulsating DC voltage is converted by a fourth conversion circuit in the second power supply module to output the second DC voltage, comprising:

The control unit outputs a control signal to control the second switch in the fourth conversion circuit to be turned on or off based on the output voltage value and/or current value of the second transformer unit detected by the second detection unit, thereby adjusting the voltage value of the output voltage of the second transformer unit to the voltage value of the second DC voltage.

55. The charging control method according to any one of claims 51 to 54, further comprising:

The control unit controls the on or off of the third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module.

56. The charging control method according to claim 55 is characterized in that the conduction or shutdown of the third switch unit connected between the positive output terminal and the negative output terminal of the second power supply module is controlled by the control unit, including: when it is determined that the voltage value of the second DC voltage is 0, the third switch unit connected is controlled to be turned on by the control unit to short-circuit the positive output terminal and the negative output terminal of the second power supply module.