CN112290652A - Device to be charged, wireless charging method and system - Google Patents
Device to be charged, wireless charging method and system Download PDFInfo
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- CN112290652A CN112290652A CN201910676046.8A CN201910676046A CN112290652A CN 112290652 A CN112290652 A CN 112290652A CN 201910676046 A CN201910676046 A CN 201910676046A CN 112290652 A CN112290652 A CN 112290652A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
- H02J7/04—Regulation of charging current or voltage
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- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
本发明公开一种待充电设备、无线充电方法及系统。待充电设备包括：电池；无线接收电路，用于接收无线充电装置发射的电磁信号，并将电磁信号转换成输出电流，以为电池充电；以及控制模块，与无线接收电路电连接，用于根据获取的电池的信息，判断电池是否满足预设的充电截止条件；当电池满足充电截止条件时，截止对电池的充电；其中，充电截止条件包括下述条件的至少其中之一：电池的电量达到预设的截止电量、电池的电压大于预设的截止电压、电池的充电电流小于预设的截止电流；截止电压和截止电流均是根据电池的温度及当前的无线充电模式确定。
The present invention discloses a device to be charged, a wireless charging method and a system. The device to be charged includes: a battery; a wireless receiving circuit for receiving an electromagnetic signal emitted by a wireless charging device and converting the electromagnetic signal into an output current to charge the battery; and a control module, electrically connected to the wireless receiving circuit, for judging whether the battery meets a preset charging cut-off condition based on the acquired battery information; when the battery meets the charging cut-off condition, the charging of the battery is cut off; wherein the charging cut-off condition includes at least one of the following conditions: the battery power reaches a preset cut-off power, the battery voltage is greater than a preset cut-off voltage, and the battery charging current is less than a preset cut-off current; the cut-off voltage and the cut-off current are both determined according to the battery temperature and the current wireless charging mode.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a device to be charged, a wireless charging method and a wireless charging system.
Background
With the popularization of wireless charging technology, more and more electronic devices support wireless charging or wireless transmission functions. At present, the cutoff voltage of the battery is generally used only as the cutoff condition of the battery charging, and the influence of the temperature of the battery, the current charging mode, on the charging cutoff voltage is not considered when the cutoff voltage of the charging is set. In order to prevent the battery from being overcharged, the cut-off voltage is usually set to be low, which may cause the battery to be not fully charged under certain conditions, resulting in low utilization rate of the battery power.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
In view of the above, the present invention provides a device to be charged, a wireless charging method and a wireless charging system.
Additional features and advantages of the invention will be set forth in the detailed description which follows, or may be learned by practice of the invention.
According to an aspect of the present invention, there is provided an apparatus to be charged, including: a battery; the wireless receiving circuit is used for receiving an electromagnetic signal transmitted by a wireless charging device and converting the electromagnetic signal into output current to charge the battery; the control module is electrically connected with the wireless receiving circuit and used for judging whether the battery meets a preset charging cut-off condition or not according to the acquired information of the battery; when the battery meets the charge cut-off condition, cutting off the charge of the battery; wherein the charge cutoff condition includes at least one of: the electric quantity of the battery reaches a preset cut-off electric quantity, the voltage of the battery is greater than a preset cut-off voltage, and the charging current of the battery is less than a preset cut-off current; wherein the cutoff voltage and the cutoff current are both determined according to the temperature of the battery and the current wireless charging mode; wherein the wireless charging mode comprises: the wireless charging device comprises a first wireless charging mode and a second wireless charging mode, wherein the output power of the wireless charging device in the first wireless charging mode is larger than the output power in the second wireless charging mode.
According to an embodiment of the present invention, the control module is configured to determine whether the electric quantity of the battery reaches the cut-off electric quantity, whether the voltage of the battery is greater than the cut-off voltage, and whether the charging current of the battery is less than the cut-off current; and when the electric quantity of the battery reaches the cut-off electric quantity, the voltage of the battery is greater than the cut-off voltage and the charging current of the battery is less than the cut-off current, determining that the battery meets the charge cut-off condition, and cutting off the charging of the battery.
According to an embodiment of the present invention, the control module is further configured to periodically start a wireless charging process according to a preset cycle time when receiving a first indication signal sent by the wireless receiving circuit; and in the wireless charging process, periodically judging whether the battery meets the charging cut-off condition according to the acquired information of the battery according to the preset cycle time.
According to an embodiment of the present invention, in the wireless charging process, after the battery is charged, the control module is further configured to determine whether a difference between the cut-off voltage and the voltage of the battery is greater than a preset recharging threshold; and when the difference value of the cut-off voltage and the voltage of the battery is larger than the recharging threshold value, restarting the charging of the battery.
According to an embodiment of the present invention, the apparatus to be charged further includes: the voltage conversion module is connected with the control module and the battery; the control module is used for controlling the voltage conversion module so that the voltage conversion module stops outputting the charging voltage and the charging current to the battery.
According to another aspect of the present invention, there is provided a wireless charging method applied to a device to be charged, including: judging whether the battery meets a preset charge cut-off condition or not according to the acquired information of the battery in the equipment to be charged; and when the battery satisfies the charge cutoff condition, cutting off the charge of the battery; wherein the charge cutoff condition includes at least one of: the electric quantity of the battery reaches a preset cut-off electric quantity, the voltage of the battery is greater than a preset cut-off voltage, and the charging current of the battery is less than a preset cut-off current; wherein the cutoff voltage and the cutoff current are both determined according to the temperature of the battery and the current wireless charging mode; wherein the wireless charging mode comprises: the wireless charging device comprises a first wireless charging mode and a second wireless charging mode, wherein the output power of the wireless charging device for wirelessly charging the equipment to be charged in the first wireless charging mode is larger than the output power of the wireless charging device in the second wireless charging mode.
According to an embodiment of the present invention, determining whether the battery meets a preset charge cutoff condition according to the acquired information of the battery in the device to be charged includes: judging whether the electric quantity of the battery reaches the cut-off electric quantity, whether the voltage of the battery is larger than the cut-off voltage and whether the charging current of the battery is smaller than the cut-off current; and when the electric quantity of the battery reaches the cut-off electric quantity, the voltage of the battery is greater than the cut-off voltage, and the charging current of the battery is less than the cut-off current, determining that the battery meets the charging cut-off condition.
According to an embodiment of the present invention, before determining whether the battery meets a charge cutoff condition determined according to a preset cutoff charge, a cutoff voltage, and a cutoff current, the method further includes: when a first indication signal sent by the wireless receiving circuit is received, periodically starting a wireless charging process according to preset cycle time; according to the acquired information of the battery in the device to be charged, judging whether the battery meets a preset charge cut-off condition comprises the following steps: and in the wireless charging process, periodically judging whether the battery meets the charging cut-off condition according to the acquired information of the battery according to the preset cycle time.
According to an embodiment of the invention, the method further comprises: in the wireless charging process, after the battery is charged, judging whether the difference value of the cut-off voltage and the voltage of the battery is greater than a preset recharging threshold value; and when the difference value of the cut-off voltage and the voltage of the battery is larger than the recharging threshold value, restarting the charging of the battery.
According to an embodiment of the present invention, the blocking of the charging of the battery comprises: and controlling a voltage conversion module in the equipment to be charged so as to enable the voltage conversion module to stop outputting charging voltage and charging current to the battery.
According to still another aspect of the present invention, there is provided a wireless charging system including: according to any one of the above devices to be charged, the wireless charging device and the power supply device; the wireless charging device is used for converting input electric energy into an electromagnetic signal to be transmitted and wirelessly charging the equipment to be charged; the power supply device is used for providing the input electric energy for the wireless charging device.
According to the device to be charged provided by the embodiment of the invention, when the battery charging cut-off condition is determined, the judgment is carried out according to the voltage of the battery, whether the electric quantity of the battery reaches the preset cut-off electric quantity or not and whether the charging current meets the cut-off condition of the current or not need to be considered, so that a more accurate judgment result can be provided. In addition, the cut-off voltage and the cut-off current of the battery can be set to different values according to different temperature intervals and different wireless charging modes, and the utilization efficiency of the electric quantity of the battery can be further improved.
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 invention, as claimed.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a block diagram illustrating a device to be charged according to an exemplary embodiment.
Fig. 2 is a schematic diagram illustrating a wireless charging system according to an exemplary embodiment.
Fig. 3 is a block diagram illustrating another device to be charged according to an example embodiment.
Fig. 4 is a flow chart illustrating a wireless charging method according to an example embodiment.
Fig. 5 is a flow chart illustrating another wireless charging method according to an example embodiment.
Fig. 6 is a flow chart illustrating yet another wireless charging method according to an example embodiment.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; can be electrically connected and also can be connected in communication; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the wireless charging process, a power supply device (e.g., an adapter) is generally connected to a wireless charging device (e.g., a wireless charging base), and the output power of the power supply device is wirelessly transmitted (e.g., electromagnetic signals or electromagnetic waves) to the device to be charged by the wireless charging device, so as to wirelessly charge the device to be charged.
According to different wireless charging principles, wireless charging methods are mainly classified into three methods, namely magnetic coupling (or electromagnetic induction), magnetic resonance and radio wave. Currently, the mainstream Wireless charging standards include QI standard, Power association (PMA) standard, and Wireless Power association (A4 WP). The QI standard and the PMA standard both adopt a magnetic coupling mode for wireless charging. The A4WP standard uses magnetic resonance for wireless charging.
Fig. 1 is a block diagram illustrating a device to be charged according to an exemplary embodiment.
The device to be charged 10 as shown in fig. 1 may be, for example, a terminal or a communication terminal, including but not limited to a terminal arranged to be connected via a wire line, such as via a Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection, and/or another data connection/network and/or via, for example, a digital television network such as a digital video broadcasting-handheld (DVB-H) network, a satellite network, an amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and/or a wireless interface of another communication terminal. Communication terminals arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals", and/or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communication System (PCS) terminals that may combine a cellular radiotelephone with data processing, facsimile and data communication capabilities; personal Digital Assistants (PDAs) that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. In addition, the terminal may further include, but is not limited to, a rechargeable electronic device having a charging function, such as an electronic book reader, a smart wearable device, a mobile power source (e.g., a charger, a travel charger), an electronic cigarette, a wireless mouse, a wireless keyboard, a wireless headset, a bluetooth speaker, and the like.
Referring to fig. 1, the device to be charged 10 includes: a wireless receiving circuit 102, a control module 104, a voltage conversion module 106 and a battery 108.
Fig. 2 is a schematic diagram illustrating a wireless charging system according to an exemplary embodiment. As shown in fig. 2, the wireless charging system 1 includes: a power supply device 11, a wireless charging device 12 and a device to be charged 10. It should be noted that, to simplify the drawing, the device to be charged 10 in fig. 2 does not show a specific structure. As to the specific structure of the device to be charged 10, see fig. 1.
Referring to fig. 1 and 2 in conjunction, the device to be charged 10 is described in detail.
The Power supply device 11 may be a Power adapter, a portable Power supply (Power Bank), or the like. The wireless charging device 12 may be, for example, a wireless charging cradle.
After the power supply device 11 is connected to the wireless charging device 12, the output current is transmitted to the wireless charging device 12.
The wireless charging device 12 includes: a wireless transmitting circuit 121 and a first control module 122.
The wireless transmitting circuit 121 is configured to convert the electric energy output by the power supply device 11 into an electromagnetic signal (or an electromagnetic wave) for transmission, so as to wirelessly charge the device to be charged 10. For example, the wireless transmission circuit 121 may include: a wireless transmission drive circuit and a transmission coil (or transmission antenna). The wireless transmission driving circuit is used for converting the direct current output by the power supply device 11 into high-frequency alternating current, and converting the high-frequency alternating current into an electromagnetic signal (or electromagnetic wave) through a transmitting coil or a transmitting antenna to be transmitted.
The first Control module 122 can be implemented by a Micro Control Unit (MCU), for example. The first control module 122 may be configured to wirelessly communicate with the device to be charged 10 during the wireless charging of the device to be charged 10 by the wireless charging apparatus 12. Specifically, the first control module 122 may wirelessly communicate with the control module 104 in the device to be charged 10.
Further, the wireless charging device 12 may further include: a charging interface 123. The wireless transmitting circuit 121 is further configured to receive the power output by the power supply device 11 through the charging interface 123, and generate an electromagnetic signal (or electromagnetic wave) according to the power output by the voltage supply device 11.
The charging interface 123 may be, for example, a USB 2.0 interface, a Micro USB interface, or a USB TYPE-C interface. In some embodiments, the charging interface 123 may also be a lightning interface, or any other type of parallel or serial interface capable of being used for charging.
The wireless receiving circuit 102 in the device to be charged 10 is configured to receive the electromagnetic signal (or electromagnetic wave) transmitted by the wireless transmitting circuit 121 and convert the electromagnetic signal (or electromagnetic wave) into the direct current output by the wireless receiving circuit 102. For example, the wireless receiving circuit 102 may include: a receiving coil or a receiving antenna, and a shaping circuit such as a rectifying circuit and/or a filter circuit connected to the receiving coil or the receiving antenna. The wireless receiving circuit 102 converts an electromagnetic signal (or an electromagnetic wave) transmitted by the wireless transmitting circuit 121 into an alternating current by a receiving coil or a receiving antenna, and rectifies and/or filters the alternating current by a shaping circuit, thereby converting the alternating current into a stable direct current to charge the battery 108.
It should be noted that the embodiment of the present invention does not specifically limit the specific form of the shaping circuit and the form of the output voltage and the output current of the wireless receiving circuit 102 obtained after shaping by the shaping circuit.
When the output voltage of the wireless receiving circuit 102 cannot satisfy the requirement of the charging voltage expected by the battery 108 and/or the output current of the wireless receiving circuit 102 cannot satisfy the requirement of the charging current expected by the battery 108, the output voltage of the wireless receiving circuit 102 may be converted by the voltage converting module 106 disposed on the first charging channel 110 (e.g., a conducting wire) to obtain the charging voltage and/or the charging current expected by the battery 108. For example, the output voltage and the output current of the wireless receiving circuit 102 are input into the voltage conversion module 106 through the first charging channel 110; after the voltage conversion module 106 converts the input voltage, the output voltage and current are applied to two ends of the battery 108 through the first charging channel 110, so as to meet the requirement of the battery 108 for expected charging voltage and/or charging current.
For example, taking the device to be charged 10 as a mobile phone as an example, when the battery 108 of the device to be charged 10 includes a single cell, the voltage of the internal single cell is generally between 3.0V and 4.35V. And when the battery 108 of the device to be charged 10 includes two cells connected in series, the total voltage of the two cells connected in series is 6.0V to 8.7V. Therefore, compared with a single battery cell, when a plurality of battery cells are connected in series, the output voltage of the wireless receiving circuit 102 can be increased. Compared with a single battery cell, the charging speed is equivalent, and the charging current required by multiple battery cells is about 1/N (N is the number of the battery cells connected in series in the device to be charged 10) of the charging current required by the single battery cell. In other words, on the premise of ensuring the same charging speed (the same charging power), the scheme of multiple cell segments can reduce the magnitude of the charging current, thereby reducing the heat productivity of the device to be charged 10 in the charging process. On the other hand, compared with the single-cell scheme, the charging voltage can be increased by adopting the multi-cell series scheme under the condition that the charging current is kept the same, so that the charging speed is increased.
The control module 104 may be implemented by, for example, a separate MCU, or may also be implemented by an Application Processor (AP) inside the device to be charged 13. The control module 104 is used to communicate with a first control module 122 in the wireless charging device 12.
The control module 104 communicates with the wireless charging device 12 in a wireless manner, and the present invention does not limit the communication manner and the communication sequence between the wireless charging device 12 and the device to be charged 10 (control module 104).
For example, the radio communication may be unidirectional radio communication or bidirectional radio communication. May be a communication initiated by the device to be charged 10 or may be a communication initiated by the wireless charging apparatus 12. In the wireless communication process, the device to be charged 10 may couple information to be transmitted to the receiving coil of the wireless receiving circuit 102, so as to transmit the information to the transmitting coil of the wireless transmitting circuit 121, and then the wireless transmitting circuit 121 transmits the decoupled information to the first control module 122. Conversely, in the two-way communication, the wireless charging apparatus 12 may couple the information to be transmitted to the transmitting coil of the wireless transmitting circuit 121, to be transmitted to the receiving coil of the wireless receiving circuit 102 of the device 10 to be charged, and to be decoupled by the receiving coil of the wireless receiving circuit 102 of the device 10 to be charged.
Alternatively, the device to be charged 10 may also communicate with the wireless charging device 12 through at least one of bluetooth, WiFi, mobile cellular network communication (e.g., 2G, 3G, 4G, or 5G), wireless communication (e.g., ieee 802.11, 802.15(WPANs), 802.16(WiMAX), 802.20, etc.), short-range wireless communication based on a high-frequency antenna (e.g., 60GHz), optical communication (e.g., infrared communication), ultrasonic communication, ultra-wideband (UMB) communication, and other communication methods. It can be understood that, when the communication is performed by the above-mentioned communication method, the device to be charged 10 and the wireless charging device 12 further include corresponding communication modules, such as a bluetooth communication module, a WiFi communication module, a 2G/3G/4G/5G mobile communication module, a high-frequency antenna, and an optical communication module. At least one of an ultrasonic communication module, an ultra-wideband communication module, and the like. It should be understood that the standards that may be employed for wireless communication as described above include past and existing standards, as well as future versions and standards that employ such standards without departing from the scope of this disclosure. By performing communication by the above-described wireless communication method, the reliability of communication can be improved, thereby improving charging safety. Compared with the method of coupling the feedback information to the receiving coil of the wireless receiving circuit 102 for communication through signal modulation in the related art (for example, the Qi standard), the reliability of communication can be improved, and voltage ripples caused by signal coupling communication can be avoided from affecting the voltage processing process of the voltage conversion module 106 of the device to be charged 10. In addition, for the voltage ripple when the wireless receiving coil outputs, if the ripple is not effectively processed, the wireless charging safety problem may be caused, and certain potential safety hazard exists. By the above wireless communication method, the voltage ripple can be eliminated, so that a circuit for processing the voltage ripple can be omitted, the complexity of the charging circuit of the device to be charged 10 is reduced, the charging efficiency is improved, the circuit setting space is saved, and the cost is reduced.
Fig. 3 is a block diagram illustrating a device to be charged according to an example embodiment. As shown in fig. 3, the wireless receiving circuit 102 may be implemented as a transmitting/receiving chip, the control module 104 may be an Application Processor (AP) in the device to be charged, and the voltage converting module 106 may be implemented as a charging chip, specifically, a charge pump (charge pump).
The control module 104 and the wireless receiving circuit 102 communicate with each other through a plurality of pins. These pins may include: a pin for transmitting a clock signal (e.g., pin 1 in fig. 3), a pin for transmitting data (e.g., pin 2 in fig. 3), and a pin for transmitting a signal (e.g., pins 3, 4, and 5 in fig. 3). The control module 104 and the voltage conversion module 106 are connected via a pin (e.g., pin 6 in fig. 3) for transmitting a clock signal and a pin (e.g., pin 7 in fig. 3) for transmitting data.
How the control module 104 in the device to be charged 10 performs wireless charging flow control will be described below with reference to fig. 1 to 3.
The control module 104 is configured to determine whether the battery 108 meets a preset charge cut-off condition according to the acquired information of the battery 108; when the battery 108 satisfies the charge cutoff condition, the charge to the battery 108 is cut off. For example, the control module 104 may cause the voltage conversion module 106 to stop outputting the charging voltage and the charging current to the battery 108 by controlling the voltage conversion module 106.
Wherein the charge cutoff condition includes at least one of the following conditions: the electric quantity of the battery reaches the preset cut-off electric quantity, the voltage of the battery is larger than the preset cut-off voltage, and the charging current of the battery is smaller than the preset cut-off current.
Accordingly, the information of the battery 108 includes at least one of the following information: the charge, voltage, and charging current of the battery 108.
Wherein, the cut-off voltage and the cut-off current are determined according to the temperature of the battery and the current wireless charging mode.
The wireless charging mode may include, for example, a first wireless charging mode and a second wireless charging mode. The first wireless charging mode may be a fast wireless charging mode. The second wireless charging mode may be referred to as a normal wireless charging mode. In the first wireless charging mode, the charging speed of the device to be charged 10 is faster than that in the second wireless charging mode. In other words, the time taken for the device to be charged 10 operating in the first wireless charging mode to fully charge the battery of the same capacity is shorter than the time taken for the device to be charged 10 operating in the second wireless charging mode.
The normal wireless charging mode may refer to a wireless charging mode in which the transmission power of the wireless charging device 12 is small (typically less than 15W, and the common transmission power is 5W or 10W). For example, a conventional wireless charging mode based on QI standard, PMA standard or A4WP standard. It usually takes several hours to fully charge a larger battery (e.g., 3000 ma-hour capacity battery) in the normal wireless charging mode.
In the fast wireless charging mode, the transmission power of the wireless charging device 12 is relatively large (usually greater than or equal to 15W, such as 15-25W). Compared with the normal wireless charging mode, the charging time required by the wireless charging device 12 to fully charge the battery with the same capacity in the fast wireless charging mode can be significantly shortened and the charging speed is faster.
Table 1 shows the cutoff voltage and cutoff current at different temperatures and in different wireless charging modes according to an example embodiment.
TABLE 1
Where T denotes a temperature of the battery, BPP denotes the second wireless charging mode, EPP denotes the first wireless charging mode, Vbat denotes a voltage of the battery, and Icharge denotes a charging current of the battery.
As shown in table 1, the cut-off voltage is reduced when the temperature of the battery is too high or too low, and the most suitable temperature is approximately 16.5 ℃ ≦ T <41 ℃, and in this temperature range, the cut-off voltage can be set higher, so that a higher utilization rate of the battery capacity can be obtained.
It should be noted that table 1 is only an example and not a limitation of the present invention.
The amount of electricity, voltage, and charging current of the battery 108 may be obtained by, for example, a detection device built in the battery 108, and the amount of electricity of the battery 108 may be measured by, for example, an electricity meter.
Alternatively, the charging current of the battery 108 may be measured by the detection circuit 112 as shown in FIG. 1. The detection circuit 112 may include, for example, a current detection circuit for detecting the charging current output by the voltage conversion module 106. The current detection circuit may sample the charging current output by the voltage conversion module 106, for example, by a current sensing resistor and a current sensing meter.
In some embodiments, the control module 104 is configured to determine whether the charge of the battery 108 reaches a cutoff charge, whether the voltage of the battery 108 is greater than a cutoff voltage, and whether the charging current of the battery 108 is less than a cutoff current. When the amount of charge of the battery 108 reaches the cutoff charge amount, the voltage of the battery 108 is greater than the cutoff voltage, and the charging current of the battery 108 is less than the cutoff current, it is determined that the battery 108 satisfies the charge cutoff condition, thereby cutting off the charging of the battery 108.
The cutoff charge may be expressed, for example, as a percentage, e.g., 100%, i.e., the cutoff charge represents the charge at which the battery 108 is fully charged. Alternatively, it may be 80%, and the cutoff charge is expressed as eighty percent of the charge when the battery 108 is fully charged.
As will be understood by those skilled in the art, if the battery 108 includes a plurality of cells and the plurality of cells are connected in series, in order to prevent some of the cells from being overcharged, when one of the cells satisfies the charge cut-off condition, the charging of all the cells is cut off, that is, the charging of the battery 108 is stopped.
After the device to be charged 10 is turned on, the control module 104 starts the wireless receiving circuit 102 by sending a first enable signal (for example, an enable signal sent through the pin 5 shown in fig. 3) to the wireless receiving circuit 102. When receiving a first indication signal (for example, a signal sent by the wireless receiving circuit 102 through the pin 4 shown in fig. 3 and set to a high level) sent by the wireless receiving circuit 102, the control module 104 periodically starts the wireless charging process according to a preset cycle time (for example, the preset cycle time may be 500ms, but the invention is not limited thereto). When receiving a second indication signal (e.g., a signal sent by the wireless receiving circuit 102 through the pin 4 shown in fig. 3 and set to a low level) sent by the wireless receiving circuit 102, the control module 104 exits the wireless charging process.
In some embodiments, in the wireless charging process, the control module 104 periodically determines whether the battery 108 meets the charge-off condition according to the information of the battery 108 according to the preset cycle time (e.g. 500 ms). As described above, the control module 104 periodically determines whether the charge of the battery 108 reaches the cutoff charge, whether the voltage of the battery 108 is greater than the cutoff voltage, and whether the charging current of the battery 108 is less than the cutoff current. When the amount of charge of the battery 108 reaches the cutoff charge amount, the voltage of the battery 108 is greater than the cutoff voltage, and the charging current of the battery 108 is less than the cutoff current, it is determined that the battery 108 satisfies the charge cutoff condition, thereby cutting off the charging of the battery 108.
In addition, in the wireless charging process, after the battery 108 is charged, the control module 104 also periodically determines whether the battery 108 meets the recharging condition according to the acquired voltage of the battery 108 according to the preset cycle time. For example, the control module 108 determines whether the difference between the cut-off voltage and the voltage of the battery 108 is greater than a preset recharging threshold (e.g., 200mV may be set), and restarts charging the battery 108 when the difference is greater than the recharging threshold. For example, the charging of the battery 108 may be restarted by controlling the voltage conversion module 106.
Further, as shown in fig. 3, the device to be charged 10 may further include: a load switching module 114 and a charging interface 116.
The charging interface 116 may be, for example, a USB 2.0 interface, a Micro USB interface, or a USB TYPE-C interface. In some embodiments, the charging interface 123 may also be a lightning interface, or any other type of parallel or serial interface capable of being used for charging.
The device to be charged 10 may also perform wired charging through the charging interface 116 based on the switching control of the load switching module 114, that is, the device to be charged is directly connected to a power supply device (such as a power adapter) through the charging interface 116, and directly receives the electric energy provided by the power supply device.
According to the device to be charged provided by the embodiment of the invention, when the battery charging cut-off condition is determined, the judgment is carried out according to the voltage of the battery, whether the electric quantity of the battery reaches the preset cut-off electric quantity or not and whether the charging current meets the cut-off condition of the current or not need to be considered, so that a more accurate judgment result can be provided. In addition, the cut-off voltage and the cut-off current of the battery can be set to different values according to different temperature intervals and different wireless charging modes, and the utilization efficiency of the electric quantity of the battery can be further improved.
It should be clearly understood that the present disclosure describes how to make and use particular examples, but the principles of the present disclosure are not limited to any details of these examples. Rather, these principles can be applied to many other embodiments based on the teachings of the present disclosure.
It is noted that the block diagrams shown in the above figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The following are embodiments of the method of the present invention, which may be applied to the above-described embodiments of the apparatus. For details which are not disclosed in the method embodiments of the present invention, reference is made to the apparatus embodiments of the present invention.
Fig. 4 is a flow chart illustrating a wireless charging method according to an example embodiment.
The wireless charging method 20 shown in fig. 4, as may be applied to the above-mentioned device to be charged 10, may be specifically executed by the control module 104 in the device to be charged 10.
Referring to fig. 4, the wireless charging method 20 includes:
in step S202, it is determined whether the battery meets a preset charge cut-off condition according to the acquired information of the battery in the device to be charged.
Wherein the charge cutoff condition includes at least one of the following conditions: the electric quantity of the battery reaches the preset cut-off electric quantity, the voltage of the battery is larger than the preset cut-off voltage, and the charging current of the battery is smaller than the preset cut-off current.
Accordingly, the information of the battery includes at least one of the following information: the charge, voltage and charging current of the battery.
The cut-off voltage and the cut-off electric quantity are determined according to the temperature of the battery and the current wireless charging mode.
Wherein, wireless charging mode includes: the wireless charging device comprises a first wireless charging mode and a second wireless charging mode, wherein the output power of the wireless charging device for wirelessly charging the equipment to be charged in the first wireless charging mode is larger than the output power of the wireless charging device in the second wireless charging mode.
In some embodiments, the wireless charging method shown in fig. 5 further provides an embodiment of how to determine whether the battery meets a preset charge cutoff condition according to the acquired information of the battery in the device to be charged, and referring to fig. 5, step S202 may further include:
in step S2022, it is determined whether the amount of electricity of the battery reaches a cutoff amount of electricity, whether the voltage of the battery is greater than the cutoff voltage, and whether the charging current of the battery is less than the cutoff current.
In step S2024, when the amount of charge of the battery reaches the cutoff charge amount, the voltage of the battery is greater than the cutoff voltage, and the charging current of the battery is less than the cutoff current, it is determined that the battery satisfies the charge cutoff condition.
In step S204, when the battery satisfies the charge cutoff condition, the charge to the battery is cut off.
In some embodiments, shutting off charging of the battery comprises: and controlling a voltage conversion module in the equipment to be charged so that the voltage conversion module stops outputting the charging voltage and the charging current to the battery.
According to the wireless charging method provided by the embodiment of the invention, when the battery charging cut-off condition is determined, the judgment is carried out according to the voltage of the battery, whether the electric quantity of the battery reaches the preset cut-off electric quantity or not and whether the charging current meets the cut-off condition of the current or not need to be considered, so that a more accurate judgment result can be provided. In addition, the cut-off voltage and the cut-off current of the battery can be set to different values according to different temperature intervals and different wireless charging modes, and the utilization efficiency of the electric quantity of the battery can be further improved.
Fig. 6 is a flow chart illustrating yet another wireless charging method according to an example embodiment. Likewise, the wireless charging method 30 shown in fig. 6 may be applied to the control module 104 of the device to be charged 10.
Referring to fig. 6, the wireless charging method 30 includes:
in step S302, when the first indication signal sent by the wireless receiving circuit is received, the wireless charging process is periodically started according to a preset cycle time.
In step S304, in the wireless charging process, it is periodically determined whether the battery meets the charge cut-off condition according to the acquired information of the battery according to a preset cycle time.
As described above, the charge cutoff condition includes at least one of the following conditions: the electric quantity of the battery reaches the preset cut-off electric quantity, the voltage of the battery is larger than the preset cut-off voltage, and the charging current of the battery is smaller than the preset cut-off current.
Accordingly, the information of the battery includes at least one of the following information: the charge, voltage and charging current of the battery.
In some embodiments, step S304 may also periodically execute step S2022 and step S2024 as shown in fig. 5, so as to determine whether the battery satisfies the charge cut-off condition.
In step S306, when the battery satisfies the charge cutoff condition, the charge to the battery is cut off.
In some embodiments, shutting off charging of the battery comprises: and controlling a voltage conversion module in the equipment to be charged so that the voltage conversion module stops outputting the charging voltage and the charging current to the battery.
Further, the wireless charging method 30 may further include:
in step S308, in the wireless charging process, after the battery is charged, it is determined whether a difference between a cut-off voltage and a voltage of the battery is greater than a preset recharging threshold; and when the difference value of the cut-off voltage and the voltage of the battery is larger than the recharging threshold value, the battery is restarted.
In some embodiments, restarting charging of the battery comprises: and controlling a voltage conversion module in the equipment to be charged so that the voltage conversion module restarts charging the battery.
Those skilled in the art will appreciate that all or part of the steps implementing the above embodiments are implemented as computer programs executed by a processor. Which when executed by a processor performs the functions defined by the method as provided by the invention. The program may be stored in a computer readable storage medium, which may be a read-only memory, a magnetic or optical disk, or the like.
Furthermore, it should be noted that the above-mentioned figures are only schematic illustrations of the processes involved in the method according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
Exemplary embodiments of the present invention are specifically illustrated and described above. It is to be understood that the invention is not limited to the precise construction, arrangements, or instrumentalities described herein; on the contrary, the invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (11)
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| CN201910676046.8A CN112290652B (en) | 2019-07-25 | 2019-07-25 | To-be-charged device, wireless charging method and system |
| PCT/CN2020/104606 WO2021013258A1 (en) | 2019-07-25 | 2020-07-24 | Device to be charged, wireless charging method and system |
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| CN201910676046.8A CN112290652B (en) | 2019-07-25 | 2019-07-25 | To-be-charged device, wireless charging method and system |
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| CN113364138A (en) * | 2021-05-19 | 2021-09-07 | 宁波微鹅电子科技有限公司 | Wireless charging control method, wireless charger and wireless charging system |
| CN114069768A (en) * | 2021-09-17 | 2022-02-18 | 荣耀终端有限公司 | Charging circuit, charging control method, device and electronic device |
| CN116094082A (en) * | 2022-06-21 | 2023-05-09 | 荣耀终端有限公司 | A charging control method and related device |
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| CN112290652B (en) | 2023-01-24 |
| WO2021013258A1 (en) | 2021-01-28 |
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