CN118399558A - Charging control method and charging device - Google Patents

Abstract

The present application provides a charging control method and a charging device, which belong to the field of charging technology. The charging control method includes: determining the current device access status of multiple charging interfaces; at least one of the multiple charging interfaces is a dual-path charging interface, and the charging path for charging the device connected to the dual-path charging interface includes a power direct charging path and a power conversion charging path; when the device access status is a first state in which a single dual-path charging interface among the multiple charging interfaces is connected to the device, the power direct charging path corresponding to the single dual-path charging interface is selected to charge the device connected to the single dual-path charging interface. The charging device based on the charging control method has lower power consumption, and can realize simultaneous fast charging of two devices with only one power conversion circuit, which is low cost.

Description

Charging control method and charging device

Technical Field

The present application relates to the field of charging technology, and in particular to a charging control method and a charging device.

Background technique

As mobile phones, laptops and other electronic devices are used more and more frequently in people's lives, work and entertainment, ordinary single-port charging devices are increasingly unable to meet consumers' usage needs. In addition, the fast charging capability of charging devices is also generally valued by consumers. Therefore, charging devices with multi-port output and fast charging function are becoming more and more popular among consumers.

Currently, the existing multi-port output charging devices on the market, such as fast charging adapters, fast charging mobile power supplies or charging data cables, are usually designed by combining voltage conversion with fast charging protocol chips. This design method generally uses one fast charging output port with one fast charging protocol chip. If one more fast charging output port is added, one more fast charging protocol chip must be used, which increases the cost of the charging device.

Summary of the invention

In order to solve the existing technical problems, the present application provides a charging control method and a charging device that can reduce power consumption and achieve simultaneous fast charging of multiple devices at a relatively low cost.

According to a first aspect of an embodiment of the present application, a charging control method is provided, including:

Determine the current device access status of multiple charging interfaces; at least one of the multiple charging interfaces is a dual-path charging interface, and the charging path for charging the device connected to the dual-path charging interface includes a power direct charging path and a power conversion charging path;

When the device access state is a first state in which a single dual-path charging interface among the multiple charging interfaces is connected to the device, the power direct charging path corresponding to the single dual-path charging interface is selected to charge the device connected to the single dual-path charging interface. According to a second aspect of an embodiment of the present application, a charging device is provided, characterized in that it includes multiple charging interfaces and a charging circuit, at least one of the multiple charging interfaces is a dual-path charging interface, and the charging circuit includes a first power conversion circuit, a charging path selection circuit corresponding to the dual-path charging interface, and a charging control circuit connected to the selection circuit;

The first power conversion circuit is used to convert a first DC voltage output by a charging power supply into a second DC voltage for output; the charging path selection circuit is respectively connected to the charging power supply, the first power conversion circuit and the corresponding dual-path charging interface, and is used to select one of the first DC voltage and the second DC voltage to output to the corresponding dual-path charging interface;

The charging control circuit is respectively connected to each of the multiple charging interfaces, and is used to control the charging path selection circuit corresponding to the single dual-path charging interface to select the first DC power supply output in the first state according to the charging control method.

Charging power supply As can be seen from the above, at least one of the multiple charging interfaces of the charging device controlled by the charging control method provided in accordance with the embodiment of the present application is a dual-path charging interface having a power direct charging path and a power conversion charging path. When the charging control method determines that there is only a single dual-path charging interface in the first state, the corresponding power direct charging path is selected to charge the single dual-path charging interface, so that the power conversion circuit corresponding to the single dual-path charging interface can be placed in an inoperative state, effectively reducing the power consumption of the charging device. In addition, based on the charging device controlled by the charging control method provided in the present application, a power direct charging circuit can be selected to fast charge the device connected to the corresponding dual-path charging interface, and a power conversion charging path can be further selected to fast charge the device connected to the corresponding other dual-path charging interface. Therefore, the charging control method and charging device provided in the present application can realize simultaneous fast charging of multiple devices with only one power conversion circuit, effectively reducing the implementation cost of fast charging of multiple devices.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

FIG1 is a schematic diagram of a method flow chart of a charging control method provided according to some embodiments of the present application;

FIG2 is a schematic diagram of the structure of a charging device provided according to an embodiment of the present application;

FIG3 is a schematic diagram of a control flow in a dual-device access state in a charging control method provided according to some embodiments of the present application;

FIG4 is a schematic diagram of the structure of a charging device provided according to an embodiment of the present application;

FIG5 is a schematic diagram of the structure of a charging device provided according to an embodiment of the present application;

FIG6 is a schematic diagram of the structure of a charging device provided according to some embodiments of the present application;

FIG7 is a schematic diagram of the structure of a charging device provided according to an embodiment of the present application;

FIG8 is a schematic diagram of the structure of a first power conversion circuit in a charging circuit provided according to an embodiment of the present application;

FIG9 is a schematic diagram of the structure of a first charging path selection circuit provided according to an embodiment of the present application;

FIG10 is a schematic diagram of the structure of a second charging path selection circuit provided according to an embodiment of the present application;

FIG11 is a schematic diagram of the structure of a charging control circuit provided according to an embodiment of the present application;

FIG. 12 is a schematic diagram of the structure of a data transmission path selection circuit provided according to an embodiment of the present application.

Detailed ways

The technical solution of the present application is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the implementation of this application. The term "and/or" used herein includes any and all combinations of one or more of the related listed items.

Please refer to FIG. 1, which is a flow chart of a charging control method provided in accordance with some embodiments of the present application. The charging control method provided in some embodiments of the present application may be applied to, but not limited to, a charging device as shown in FIG. 2. The charging device provided in some embodiments of the present application includes a charging circuit 1 and a plurality of charging interfaces, at least one of the plurality of charging interfaces being a dual-path charging interface. A dual-path charging interface refers to a charging interface whose charging path for charging the connected device includes a power direct charging path and a power conversion charging path. The first charging interface 2 and the second charging interface 3 shown in FIG. 2 are dual-path charging interfaces having a power direct charging path and a power conversion charging path, respectively. Specifically, the power direct charging path refers to a charging path in which the first DC voltage VBUS output by the charging power source is used as the charging voltage of the corresponding connected device, and the power conversion charging path refers to a charging path in which the second DC voltage obtained after power conversion with the first DC voltage is used as the charging voltage of the corresponding connected device. As shown in FIG. 2, the first DC voltage VBUS output by the charging power source can be input to the charging device by the power input terminal VBUSIN of the charging device. For the first charging interface 2, the first charging path selection circuit 13 connected thereto can select one of the first DC voltage VBUS and the second DC voltage VDCA obtained after the first DC voltage VBUS is converted by the first power conversion circuit 12 to charge the device connected to the first charging interface 2, that is, based on the first charging path selection circuit 13, one of the power direct charging path and the power conversion charging path corresponding to the first charging interface 2 is selected to charge the device connected to the first charging interface 2. For the second charging interface 3, the first charging path selection circuit 14 connected thereto can select one of the first DC voltage VBUS and the second DC voltage VDCA to charge the device connected to the second charging interface 3, that is, based on the second charging path selection circuit 14, one of the power direct charging path and the power conversion charging path corresponding to the second charging interface 14 is selected to charge the device connected to the second charging interface 3. It should be noted that in the charging device provided in the embodiment of the present application, the dual-path charging interface in the multiple charging interfaces is not limited to including the first charging interface 2 and the second charging interface 3 shown in FIG. 2, and the multiple charging interfaces are not limited to only including the dual-path charging interface, and can further include a single-path charging interface that only charges by the power conversion charging path. The charging control device provided in the embodiment of the present application will be described below by taking the charging device shown in FIG. 2 as an optional application scenario of the charging control method provided in the embodiment of the present application, but the charging control method provided in the embodiment of the present application is not limited to the charging device shown in FIG. 2. Specifically, the charging control method provided in the embodiment of the present application can be applied to the charging control circuit 11 in the charging device provided in the present application, that is, the charging control circuit 11 determines the device access status of multiple charging interfaces according to the charging control method provided in the embodiment of the present application, and controls the charging path selection circuit (such as the first charging path selection circuit 13 and the second charging path selection circuit 14) in the charging device according to the determined device access status to select one of the power direct charging path and the power conversion charging path corresponding to the dual-path charging interface to charge the device connected to the dual-path charging interface.

The charging control method provided in some embodiments of the present application includes steps S02 and S04, and the specific description of each step is as follows.

S02: Determine the current device access status of multiple charging interfaces; at least one of the multiple charging interfaces is a dual-path charging interface, and the charging path for charging the access device of the dual-path charging interface includes a power direct charging path and a power conversion charging path.

Multiple charging interfaces refer to multiple charging interfaces in a charging device. The charging device may be, but is not limited to, the charging device provided in each embodiment of the present application. For example, in some embodiments, the multiple charging interfaces include a first charging interface 2 and a second charging interface 3 shown in FIG. 2, that is, the multiple charging interfaces 2 include two dual-path charging interfaces. In other embodiments, the multiple charging interfaces may also include only one dual-path charging interface or more dual-path charging interfaces.

The device access status refers to the status of the device currently connected to each of the multiple charging interfaces. The device access status is divided according to the number of dual-path charging interfaces that are connected to the device among the multiple charging interfaces. The number of dual-path charging interfaces connected to the device is different, and the corresponding device access status is also different. Access here means that the device to be charged is electrically connected to the corresponding charging interface, where the device to be charged includes but is not limited to mobile phones, laptops and tablets.

S04: When the device access state is a first state in which a single dual-path charging interface among multiple charging interfaces is connected to the device, a power direct charging path corresponding to the single dual-path charging interface is selected to charge the device connected to the single dual-path charging interface.

The first state is a device access state in which only one of the multiple charging interfaces is connected to the device. For example, taking the charging device shown in FIG2 as an example, when the charging control circuit 11 determines that one of the first charging interface 2 and the second charging interface 3 is connected to the device, and the other is in a state where the device is not connected, the device access state is determined to be the first state.

In the first state, a power direct charging path is selected to charge the device connected to the single dual-path charging interface currently connected to the device. The first power conversion circuit 12 corresponding to the single dual-path charging interface can be controlled to be in a standby state to reduce the power consumption of the charging device.

In addition, since the path for charging the device connected to the dual-path charging interface includes a power direct charging path and a power conversion charging path, when the first DC voltage VBUS output by the charging power source is used to directly charge the device connected to the corresponding dual-path charging interface (such as one of the first charging interface 2 and the second charging interface 3), the charging power can meet the fast charging requirements, and by controlling the output power of the first power conversion circuit 12, the power conversion charging path is used to charge the device connected to the corresponding other dual-path charging interface (such as the other of the first charging interface 2 and the second charging interface 3). The charging power can also meet the fast charging requirements. Therefore, based on the charging device controlled by the charging control method provided in the embodiment of the present application, only one first power conversion circuit 12 is required to quickly charge two connected devices at the same time, and the cost of realizing simultaneous fast charging of two devices is low. Further, when it is determined that the device access state is the first state, the control method provided in accordance with the embodiment of the present application also includes controlling the first power conversion circuit 12 to be in a standby state to reduce the power consumption of the charging device. The first DC voltage VBUS is not directly passed through the first power conversion circuit 12 to the single dual-path charging interface (such as one of the first charging interface 2 and the second charging interface 3) currently connected to the device, so as to charge the currently connected device. Controlling the first power conversion circuit 12 to be in standby mode can also make the output power of the charging power supply completely transparent to the single dual-path charging interface currently connected to the device. Therefore, the charging device based on the charging control method provided in the embodiment of the present application can effectively reduce power consumption while realizing the fast charging function of a single device.

As an optional implementation scheme, please continue to refer to FIG. 1 , the charging control method provided in the embodiment of the present application also includes S06, which is described as follows.

S06: When the device access state is the second state in which two dual-path charging interfaces among multiple charging interfaces are respectively connected to the device, a power direct charging path corresponding to the first dual-path charging interface is selected to charge the device connected to the first dual-path charging interface, and a power conversion charging path corresponding to the second dual-path charging interface is selected to charge the device connected to the second dual-path charging interface; wherein the first dual-path charging interface is one of the two dual-path charging interfaces whose power of the connected device meets the preset conditions, and the second dual-path charging interface is the other of the two dual-path charging interfaces.

The second state is the device access state in which two dual-path charging interfaces among the multiple charging interfaces are connected to the device. For example, taking the charging device shown in FIG2 as an example, when the charging control circuit 11 determines that both the first charging interface 2 and the second charging interface 3 are connected to the device, the device access state is determined to be the second state.

Specifically, in some embodiments, determining the device access status in S02 includes, when it is detected that a device is currently connected to a dual-path charging interface, determining whether there is another dual-path charging interface that is currently connected to a device; if so, determining that the device access status is the second state; if not, determining that the device access status is the first state. For example, when it is detected that a device is currently connected to the first charging interface 2, determining whether the second charging interface 3 is currently connected to a device, that is, determining whether the second charging interface 3 is currently in a state of being connected to a previously connected device, if so, determining that the device access status is the second state, otherwise determining that the device access status is the first state. Similarly, when it is detected that a device is currently connected to the second charging interface 3, determining whether the first charging interface 2 is currently connected to a device, that is, determining whether the first charging interface 2 is currently in a state of being connected to a previously connected device, if so, determining that the device access status is the second state, otherwise determining that the device access status is the first state.

In the second state, the charging control circuit 11 further determines that one of the two dual-path charging interfaces whose power of the connected device meets the preset conditions is the first dual-path charging interface, and the other is the second dual-path charging interface according to the power of the devices connected to the two dual-path charging interfaces currently connected to the device. For the first dual-path charging interface, select its corresponding power direct charging path to charge its corresponding connected device. For the second charging path, select its corresponding power conversion charging path to charge its corresponding connected device. It should be noted here that the power of the connected device refers to the charging power required for the device to be charged that is connected to the charging interface to be charged by the charged device.

Still taking the charging device shown in Figure 2 as an example, when the charging control circuit 11 determines that both the first charging interface 2 and the second charging interface 3 are connected to devices, if the charging power required by the first charging interface 2 meets the preset conditions, the first charging interface 2 is determined to be the first dual-path charging interface, and the second charging interface 3 is the second dual-path charging interface; if the charging power required by the device connected to the second charging interface 3 meets the preset conditions, the second charging interface 3 is determined to be the first dual-path charging interface, and the first charging interface 2 is the second dual-path charging interface.

Specifically, in some embodiments, the one whose power of the connected device meets the preset condition in S06 refers to the one with the largest power among the two devices connected to the two dual-path charging interfaces currently connected to the device, or the one with power greater than or equal to the preset power among the two devices. That is, in some embodiments, the first dual-path charging interface is the one with the largest power among the two dual-path charging interfaces connected to the device, while in other embodiments, the first dual-path charging interface may also be the one with the power of the connected device greater than or equal to the preset power among the two dual-path charging interfaces. It should be noted that in the embodiments of the present application, the power of the device specifically refers to the charging power required by the device.

If it is determined that the first charging interface 2 is the first dual-path charging interface and the second charging interface 3 is the second dual-path charging interface, the charging control circuit controls the first charging path selection circuit 13 corresponding to the first charging interface 2 to select the first DC voltage VBUS to output to the first charging interface 2, that is, select the power direct charging path corresponding to the first charging interface 2 to charge the device connected to the first charging interface 2 to meet the fast charging demand, and controls the second charging path selection circuit corresponding to the second charging interface 3 to select the second DC voltage VDCA to output to the second charging interface 3, that is, select the power conversion charging path corresponding to the second charging interface 3 to charge the device connected to the second charging interface 3. In addition, the charging control circuit 11 controls the first power conversion circuit 12 so that the power output by the first power conversion circuit 12 meets the fast charging demand of the device connected to the second charging interface 3. Obviously, based on the charging control method provided in the embodiment of the present application, when fast charging two devices at the same time, there is no need to use two power conversion circuits respectively connected to the power input terminal VBUSIN to realize the simultaneous fast charging of the two devices, and only one first power conversion circuit is needed to realize the fast charging function of the two devices at the same time. Therefore, the charging control method provided in the embodiment of the present application will not increase the number of power conversion circuits in the charging device while realizing simultaneous fast charging of two devices, thereby effectively reducing the implementation cost of dual-device fast charging.

Further, when it is determined that the device access state is the second state, the charging control method provided in accordance with some embodiments of the present application also includes allocating power to the charging interface of the currently connected device among the multiple charging interfaces according to a preset power allocation strategy. Wherein, the preset allocation strategy includes a strategy that gives priority to meeting the charging power requirements of the device connected to the first dual-path charging interface. Further, the charging control method provided in accordance with an embodiment of the present application also includes, after allocating power to the charging interface of the currently connected device among the multiple charging interfaces according to the preset power allocation strategy, according to the result of the power allocation, controlling the first power conversion circuit to output power corresponding to the power allocated to the second dual-path charging interface.

The output power of the charging power supply is the power at the power input terminal VBUSIN, and the charging control circuit 11 distributes the output power of the charging power supply according to the above power allocation strategy. In the first state, the first power conversion circuit 12 is controlled to be in standby state to reduce power consumption, and the output power of the charging power supply is transparently transmitted to a single dual-path charging interface currently connected to the device, so as to achieve single-port fast charging output with lower power consumption. In the second state, the charging control circuit 11 dynamically adjusts the power allocation result including multiple charging interfaces according to the output power of the charging power supply, and can adapt to charging power supplies with different rules. According to the output power of the charging power supply, according to the above power allocation strategy, it is possible to give priority to ensuring that the power meets the power requirements of the preset conditions, and on the premise of meeting the power requirements of the higher-power devices, the remaining power of the output power of the charging power supply after being allocated to the charging interface connected to the higher-power device is allocated to other charging interfaces.

For example, in some embodiments, the charging interface only includes the first charging interface 2 and the second charging interface 3, and the maximum output power of the charging power source is 100W. In the first state, the entire 100W power is allocated to the single dual-path charging interface of the currently connected device, and in the second state, if the power of the two devices connected to the two dual-path charging interfaces meets the preset condition and the required power is 82W, then 82W of power is allocated to the first dual-path charging interface, and 18W of power is allocated to the second dual-path charging interface. In other embodiments, if the output power of the charging power source is less than 36W, in the second state, the power output by the charging power source can also be directly and evenly allocated to the first dual-path charging interface and the second dual-path charging interface.

In some embodiments, the first dual-path charging interface is the one with the highest power of the two dual-path charging interfaces currently connected to the device, then S06 further includes: comparing the powers of the devices connected to the two dual-path charging interfaces; determining the one with the highest power of the two dual-path charging interfaces as the first dual-path charging interface, and the other of the two dual-path charging interfaces as the second dual-path charging interface. Using the power direct charging path to charge the one with the highest power of the two devices connected to the two dual-path charging interfaces can ensure fast charging of devices with higher power.

In other embodiments, in the second state, there is no need to compare the powers of the two devices connected to the two dual-path charging interfaces. It is only necessary to determine that one of the two devices has a power greater than or equal to a preset charging power to determine that the first dual-path charging interface needs to be charged directly from a power source.

The second state includes a state where two devices are connected simultaneously and a state where two devices are connected one after another. The state where two devices are connected one after another means that when a device is detected to be connected to a dual-path charging interface, the other dual-path charging interface is currently in a state where a device is connected. The state where two devices are connected one after another is such as when a device is detected to be connected to the first charging interface 2, the second charging interface 3 is currently in a state where a device is connected, and when a device is detected to be connected to the second charging interface 3, the first charging interface 2 is currently in a state where a device is connected.

In some embodiments, if the device connected to the first charging interface 2 is a high-power device, and the device connected to the second charging interface 3 is a low-power device, the charging control method provided by the present application also includes the following control process: in the second state in which it is currently detected that a device is connected to the first charging interface 2, the first power conversion circuit 12 is controlled to switch from the standby state to the working state to output the second DC voltage VDCA, and the first charging path selection circuit 13 is currently in the first selection state to select the first DC voltage VBUS to be output to the first charging interface 2 to charge the high-power device currently connected to the first charging interface 2, and the selection state of the second charging path selection circuit 14 is controlled to switch from the first selection state to the second selection state to electrically isolate the power input terminal VBUSIN from the second charging interface 3, and electrically connect the output terminal of the first power conversion circuit 12 to the second charging interface 3, so that the second charging path selection circuit 14 selects the second The DC voltage VDCA is output to the second charging interface 3 to charge the relatively low-power device previously connected to the second charging interface 3; in the second state in which it is currently detected that a device is connected to the second charging interface 3, the first power conversion circuit 12 is controlled to switch from the standby state to the working state to output the second DC voltage VDCA, and the first charging path selection circuit 13 is controlled to maintain the first selection state to continue to select the first DC voltage VBUS to be output to the first charging interface 2 to charge the relatively high-power device previously connected to the first charging interface 2, and the selection state of the second charging path selection circuit 14 is controlled to be the second selection state to electrically connect the power input terminal VBUSIN to the second charging interface 3, and electrically isolate the output terminal of the first power conversion circuit 12 from the second charging interface 3, so that the second charging path selection circuit 14 selects the second DC voltage VDCA to be output to the second charging interface 3 to charge the relatively low-power device currently connected to the second charging interface 3. If the device connected to the first charging interface 2 is a relatively low-power device, and the device connected to the second charging interface 3 is a relatively high-power device, the charging control method provided in the present application further includes the following control process: in the second state in which it is currently detected that a device is connected to the first charging interface 2, the first power conversion circuit 12 is controlled to switch from the standby state to the working state to output the second DC voltage VDCA, and the first charging path selection circuit 13 is controlled to be currently in the second selection state to select the second DC voltage VDCA to be output to the first charging interface 2 to charge the relatively low-power device currently connected to the first charging interface 2, and the selection state of the second charging path selection circuit 14 is controlled to continue to be maintained in the first selection state, so as to continue to electrically connect the power input terminal VBUSIN to the second charging interface 3, and continue to electrically isolate the output terminal of the first power conversion circuit 12 from the second charging interface 3, so that the second charging path selection circuit 14 continues to select the first DC voltage VB US is output to the second charging interface 3 to charge the higher power device previously connected to the second charging interface 3; when it is currently detected that a device is connected to the second charging interface 3 in the second state, the first power conversion circuit 12 is controlled to switch from the standby state to the working state to output the second DC voltage VDCA, and the first charging path selection circuit 13 is controlled to switch from the first selection state to the second selection state to select the second DC voltage VDCA to be output to the first charging interface 2 to charge the lower power device previously connected to the first charging interface 2, and the selection state of the second charging path selection circuit 14 is controlled to be the first selection state to electrically connect the power input terminal VBUSIN to the second charging interface 3, and electrically connect the output terminal of the first power conversion circuit 12 to the second charging interface 3, so that the second charging path selection circuit 14 selects the first DC voltage VBUS to be output to the second charging interface 3 to charge the higher power device currently connected to the second charging interface 3.

According to the charging control method provided in the embodiment of the present application, according to the device access state, in the first state, the first DC voltage VBUS output by the charging power supply is controlled to charge the corresponding device directly to the single dual-path charging interface of the currently connected device without passing through the first power conversion circuit 12, and in the second state, the first DC voltage VBUS output by the charging power supply is controlled to charge one of the two currently connected devices whose power meets the preset conditions without passing through the first power conversion circuit 12, and at the same time, the first power conversion circuit 12 is controlled to output the second DC voltage VDCA, and the second DC voltage VDCA is controlled to charge the other of the two devices, so that the second DC voltage VDCA can be controlled to reach the fast charging power required by the other device. Therefore, the charging device based on the charging control method provided in the embodiment of the present application can reduce the loss of the charging circuit, and can realize the simultaneous fast charging of two devices with only one power conversion circuit, which is low in cost.

Please refer to Figure 3. In some embodiments, if it is determined that the device access state is the second state, and the two devices connected to the two dual-path charging interfaces are connected one after another, S06 may specifically include S062, S064 and S066. The specific description of each step is as follows.

S062: Compare the power of the device that is connected later of the two devices with the power of the device that is connected earlier of the two devices.

The two devices in S062 refer to the devices connected to the two dual-path charging interfaces, such as the devices connected to the first charging interface 2 and the second charging interface 3. The later-connected device is the device that is connected later in the second state, and the earlier-connected device is the device that is connected earlier in the second state. For example, if the first charging interface 2 is connected to the first device and the second charging interface 3 is already connected to the second device, the first device is the later-connected device and the second device is the earlier-connected device; for another example, if the second charging interface 3 is connected to the second device and the first charging interface 2 is already connected to the first device, the second device is the later-connected device and the first device is the earlier-connected device.

The power of the device refers to the charging power required by the device, and the charging power of the device is the product of the charging voltage and the charging current of the device. Comparing the power of the later-connected device with the power of the earlier-connected device includes: when the later-connected device is detected to be connected, detecting the power of the later-connected device, and comparing the power of the later-connected device with the power of the earlier-connected device to determine whether the power of the later-connected device is greater than the power of the earlier-connected device.

S064: If the power of the later connected device is greater than the power of the earlier connected device, select the first DC voltage VBUS as the charging voltage of the later connected device, and switch the charging voltage of the earlier connected device from the first DC voltage VBUS to the second DC voltage VDCA.

Still taking the charging device shown in FIG. 2 as an example, when the first connected device is connected to one of the first charging interface 2 and the second charging interface 3, the charging control circuit 11 directly controls the first DC voltage VBUS to directly charge the first connected device. When the first connected device is connected to one of the first charging interface 2 and the second charging interface 3, if it is detected that the later connected device is connected to the other of the first charging interface 2 and the second charging interface 3, and it is compared that the power of the later connected device is greater than the power of the first connected device, then the one of the first charging path selection circuit 13 and the second charging path selection circuit 14 connected to the later connected device is controlled to be in the first selection state, so that the power input terminal VBUSIN is electrically connected to the later connected device, and the output terminal of the first power conversion circuit 12 is electrically isolated from the later connected device, so as to select the first DC voltage VBUS to be output to the later connected device, that is, the first DC voltage VBUS is used to directly charge the later connected device. The device is charged; at the same time, the first power conversion circuit 12 is controlled to enter the working state from the standby state to convert the first DC voltage VBUS into the second DC voltage VDCA for output, and the one of the first charging path selection circuit 13 and the second charging path selection circuit 14 connected to the previously connected device is controlled to be in the second selection state, so that the connection state between the power input terminal VBUSIN and the previously connected device is switched from the electrically connected state to the electrically isolated state, and the connection state between the output terminal of the first power conversion circuit 12 and the previously connected device is switched from the electrically isolated state to the electrically connected state, so as to switch the charging voltage of the previously connected device from the first DC voltage VBUS to the second DC voltage VDCA.

S066: If the power of the later connected device is less than or equal to the power of the earlier connected device, maintain the first DC voltage VBUS as the charging voltage of the earlier connected device, and use the second DC voltage VDCA as the charging voltage of the later connected device.

When it is detected that the power of the later-connected device is less than or equal to the power of the earlier-connected device, the charging voltage of the earlier-connected device continues to be maintained at the first DC voltage VBUS, and one of the first charging path selection circuit 13 and the second charging path selection circuit 14 connected to the later-connected device is controlled to be in the second selection state, so that the power input terminal VBUSIN is electrically isolated from the later-connected device, and the output terminal of the first power conversion circuit 12 is electrically connected to the later-connected device, so as to select the second DC voltage VDCA to charge the later-connected device.

When the first connected device is connected, the first DC voltage VBUS is controlled to directly charge the first connected device, which can effectively reduce the power consumption of the first power conversion circuit 12. When the first connected device is already connected, when the later connected device is detected to be connected, according to the power comparison result of the later connected device and the first connected device, the first DC voltage VBUS is used to charge the device with higher power among the later connected device and the first connected device, and the second DC voltage VBUS is used to charge the device with lower power among the later connected device and the first connected device, so as to realize the fast charging output of a single device without relying on the first power conversion circuit 12, and realize the fast charging output of two devices at the same time with only one first power conversion circuit 12. Therefore, the charging device based on the charging control method provided in the embodiment of the present application can realize the fast charging of two devices at the same time, with low power consumption and low implementation cost.

In some embodiments, the above S06 may further specifically include the charging control method further including the description of each step of S060 and S061 as follows.

S060: Determine whether the power of the subsequently connected device meets a preset condition.

In a dual-device access state where two devices are connected successively, if the power of the later-accessed device meets the preset conditions, the charging voltage of the later-accessed device can be directly determined to be the first DC voltage VBUS, without comparing the power of the later-accessed device with the power of the earlier-accessed device to determine the charging voltage of the later-accessed device. For example, when it is detected that the power of the later-accessed device meets the power of the notebook, it is determined that the later-accessed device meets the preset conditions. The preset conditions may mean that the power of the later-accessed device is greater than or equal to the preset power or that the power of the later-accessed device is within the preset power range. If the judgment result of S060 is yes, it is determined that the dual-path charging interface connected to the later-accessed device is the first dual-path charging interface, and S061 is executed. If the judgment result of S060 is no, the first dual-path charging interface and the second dual-path charging interface can be determined based on the power size of the later-accessed device and the earlier-accessed device, that is, S062 is subsequently executed.

S061: adopting the first DC voltage VBUS as the charging voltage of the device connected later, and switching the charging voltage of the device connected earlier of the two devices from the first DC voltage VBUS to the second DC voltage VDCA.

Taking the charging device shown in Figure 2 as an example, when the previously connected device has been connected to one of the first charging interface 2 and the second charging interface 3, if it is detected that a later connected device is currently connected to the other of the first charging interface 2 and the second charging interface 3, and the power of the later connected device meets the preset conditions, then the charging voltage of the later connected device is directly determined to be the first DC voltage VBUS, and the charging voltage of the previously connected device needs to be switched from the first DC voltage VBUS to the second DC voltage VDCA.

Furthermore, in some embodiments, the above S06 may also specifically include: controlling the power direct charging path corresponding to the first dual-path charging interface to be in an on state, and the power conversion charging path corresponding to the first dual-path charging interface to be in an off state; and controlling the power direct charging path corresponding to the second dual-path charging interface to be in an off state, and the power conversion charging path corresponding to the second dual-path charging interface to be in an on state.

Specifically, controlling the power direct charging path corresponding to the first dual-path charging interface to be in an on state and the power conversion charging path corresponding to the first dual-path charging interface to be in an off state means controlling the first charging path selection circuit to be in a first selection state to electrically connect the power input terminal VBUSIN to the first dual-path charging interface, and electrically isolate the output of the first power conversion circuit 12 from the first charging path selection circuit; controlling the power direct charging path corresponding to the second dual-path charging interface to be in an off state and the power conversion charging path corresponding to the second dual-path charging interface to be in an on state means controlling the second charging path selection circuit to be in a second selection state to electrically isolate the power input terminal VBUSIN from the second dual-path charging interface, and electrically connect the output of the first power conversion circuit 12 to the first charging path selection circuit.

Please refer to FIG. 1 . In some embodiments, the present application further provides a charging device, which includes a plurality of charging interfaces and a charging circuit 1. At least one of the plurality of charging interfaces is a dual-path charging interface. The charging circuit includes a first power conversion circuit 12, a charging path selection circuit corresponding to the dual-path charging interface, and a charging control circuit 11 connected to the charging path selection circuit. The first power conversion circuit 12 is used to convert a first DC voltage VBUS output by a charging power source into a second DC voltage VDCA for output. The charging path selection circuit is respectively connected to the charging power source, the first power conversion circuit 12, and the corresponding dual-path charging interface, and is used to select one of the first DC voltage VBUS and the second DC voltage VDCA to output to the corresponding dual-path charging interface. The charging control circuit 11 is respectively connected to each of the plurality of charging interfaces, and is used to control the charging path selection circuit corresponding to a single dual-path charging interface currently connected to the device to select the first DC power output in the first state according to the charging control method provided in any embodiment of the present application. The charging path selection circuit corresponding to the dual-path charging interface means that each dual-path charging interface has a correspondingly connected charging path selection circuit, and the correspondingly connected charging path selection circuit is used to select one of the power direct charging path and the power conversion charging path to charge the device connected thereto. The charging device provided in the embodiment of the present application and the charging control method provided in the embodiment of the present application can achieve the same technical effect, which will not be repeated here.

Please continue to refer to FIG. 1 . As an optional implementation scheme, the charging device provided in the embodiment of the present application also includes a power input terminal VBUSIN for receiving a first DC voltage VBUS output by a charging power source. The first power conversion circuit 12 is connected to the power input terminal VBUSIN, and is used to convert the first DC voltage VBUS output by the charging power source into a second DC voltage VDCA output. Specifically, in the present embodiment, the multiple charging interfaces include a first charging interface 2 and a second charging interface 3, wherein the first charging interface 2 and the second charging interface 3 are dual-path charging interfaces respectively. Therefore, in the present embodiment, the charging path selection circuit specifically includes a first charging path selection circuit 13 corresponding to the first charging interface 2 and a second charging path selection circuit corresponding to the second charging interface 3.

The first charging path selection circuit 13 is respectively connected to the power input terminal VBUSIN, the output terminal of the first power conversion circuit 12 and the first charging interface 2, and is used to select one of the first DC voltage VBUS and the second DC voltage VDCA to output to the first charging interface 2. The second charging path selection circuit 14 is respectively connected to the power input terminal VBUSIN, the output terminal of the first power conversion circuit 12 and the second charging interface 3, and is used to select one of the first DC voltage VBUS and the second DC voltage VDCA to output to the second charging interface 3. The charging control circuit 11 is respectively connected to the first charging interface 2 and the second charging interface 3, and is used to control one of the first charging path selection circuit 13 and the second charging path selection circuit 14 that is electrically connected to the connected device to select the first DC voltage VBUS to output according to the charging control method provided in any embodiment of the present application in the first state. In the second state, the charging control circuit 11 controls the first power conversion circuit 12 to convert the first DC voltage VBUS into the second DC voltage VDCA, and controls one of the first charging path selection circuit 13 and the second charging path selection circuit 14 connected to the first dual-path charging interface to select the first DC voltage VBUS output, so as to use the first DC power supply VBUS to charge the device whose power meets the preset conditions, and controls one of the first charging path selection circuit 13 and the second charging path selection circuit 14 connected to the second dual-path charging interface to select the second DC voltage VDCA output, so as to use the second DC voltage VDCA to charge the device connected to the second dual-path long charging interface.

In some embodiments, both the first charging interface 2 and the second charging interface 3 are USB Type-C interfaces, or one of the first charging interface 2 and the second charging interface 3 is a USB Type-C interface, and the other is a lightning interface.

If the currently connected device is a device connected to the first charging interface 2, the charging control circuit 11 controls the first charging path selection circuit 13 to be in the first selection state, so that the first charging path selection circuit 13 selects the power input terminal VBUSIN to be electrically connected to the first charging interface 2, and the output terminal of the first power conversion circuit 12 is electrically isolated from the first charging interface 2, thereby selecting the first DC voltage VBUS to be output to the first charging interface 2, so as to adopt the power direct charging path using the first DC voltage VBUS as the charging voltage to charge the device corresponding to the first charging interface 2. The first DC voltage VBUS does not need to pass through the first power conversion circuit 12, but is directly output to the first charging interface 2 by the first charging path selection circuit 13, so that the first power conversion circuit 12 can be controlled to be in a standby state at this time, so as to reduce the loss of the first power conversion circuit 12 and effectively improve the energy conversion efficiency.

Similarly, if the currently connected device is a device connected to the second charging interface 3, the charging control circuit 11 controls the second charging path selection circuit 14 to be in the first selection state, so that the second charging path selection circuit 14 selects the power input terminal VBUSIN to be electrically connected to the second charging interface 3, and the output terminal of the first power conversion circuit 12 is electrically isolated from the second charging interface 3, thereby selecting the first DC voltage VBUS to be output to the second charging interface 3, so as to use the power direct charging path with the first DC voltage VBUS as the charging voltage to charge the device connected to the second charging interface 3. The first DC voltage VBUS does not need to pass through the first power conversion circuit 12, but is directly output to the second charging interface 3 through the second charging path selection circuit 14, so that the first power conversion circuit 12 can be controlled to be in a standby state at this time, so as to reduce the loss of the first power conversion circuit 12 and effectively improve the energy conversion efficiency.

In some embodiments, the charging path selection circuit may be a switch circuit, which has two input terminals respectively connected to the charging input terminal and the output terminal of the first power conversion circuit, an output terminal connected to the corresponding dual-path charging interface, and a switch control terminal connected to the charging control circuit 11. The charging control circuit 11 is used to output a corresponding switch control signal to the switch control terminal of the switch circuit to control one of the two input terminals of the switch circuit to be electrically connected to the output terminal of the switch circuit, and the other to be disconnected from the output terminal of the switch circuit, thereby realizing the selection of the charging path corresponding to the dual-path charging interface.

Specifically, the first charging path selection circuit 13 includes a first switch circuit, and the second charging path selection circuit 14 includes a second switch circuit. The selection state of the first charging path selection circuit 13 corresponds to the switch state of the first switch circuit. When the first switch circuit is in a first switch state that electrically connects the power input terminal VBUSIN to the first charging interface 2 and electrically isolates the output terminal of the first power conversion circuit 12 from the first charging interface 2, the first charging path selection circuit 13 is in the first selection state; when the first switch circuit is in a second switch state that electrically isolates the power input terminal VBUSIN from the first charging interface 2 and electrically connects the output terminal of the first power conversion circuit 12 to the first charging interface 2, the first charging path selection circuit 13 is in the second selection state. Similarly, the selection state of the second charging path selection circuit 14 corresponds to the switch state of the second switch circuit. When the second switch circuit is in the first switch state of electrically connecting the power input terminal VBUSIN to the second charging interface 3 and electrically isolating the output terminal of the first power conversion circuit 12 from the second charging interface 3, the second charging path selection circuit 14 is in the first selection state; when the second switch circuit is in the second switch state of electrically isolating the power input terminal VBUSIN from the second charging interface 3 and electrically connecting the output terminal of the first power conversion circuit 12 to the second charging interface 3, the second charging path selection circuit 14 is in the second selection state. That is, in the charging device provided according to the present application, the first selection state of the charging path selection circuit refers to the state of selecting the first DC voltage VBUS to be output to the corresponding dual-path charging interface, and the second selection state refers to the state of selecting the second DC voltage VDCA to be output to the corresponding dual-path charging interface. In some embodiments, the multiple charging interfaces of the charging device also include at least one single-path charging interface, and the charging circuit 1 also includes a second power conversion circuit corresponding to the single-path charging interface. The input end of the second power conversion circuit is connected to the output end of the charging power supply, and the output end is connected to a corresponding single-path charging interface. Specifically, the first power conversion circuit 12 and the second power conversion circuit are connected to the output end of the charging power supply through the power input terminal VBUSIN respectively. A single-path charging interface means that the charging path for charging it is only a power conversion charging path, and its power conversion charging path refers to a charging path based on the second power conversion circuit converting the first DC voltage into a third DC voltage VDCB as a charging voltage.

Specifically, in the charging device provided in the embodiment of the present application, the dual-path charging interface is a fast charging interface with a fast charging function, and the single-path charging interface is a normal charging interface for normal charging (non-fast charging). Continuing to refer to FIG. 4 , in some embodiments, the multiple charging interfaces of the charging device also include a third charging interface 4 , wherein the third charging interface 4 is a single-path charging interface, which is charged based on the third DC voltage VDCB output by the corresponding second power conversion circuit 15 .

Specifically, the charging control circuit 11 is also used to determine the power allocated to the third charging interface 4 when a device is connected to the third charging interface 4, and control the second power conversion circuit 15 to output corresponding power to the third charging interface 4 according to the power allocated to the third charging interface 4. The third charging interface 4 can be a Micro USB interface or a DC socket interface.

In some embodiments, the charging control circuit 11 allocates the output power of the charging power source to the device connected to the first dual-path charging interface according to the charging power demand of the device connected to the first dual-path charging interface, and allocates the remaining power to the devices connected to the second dual-path charging interface and the third charging interface. For example, the maximum output power of the charging power source is 100W. If the charging power required by the device connected to the first dual-path charging interface is 72W, 72W of power is allocated to the first dual-path charging interface, 18W is allocated to the second dual-path charging interface 3, and 10W is allocated to the third charging interface 4. The power allocated to the third charging interface 4 is less than the power allocated to the first charging interface 2 and the second charging interface 3.

Specifically, in some embodiments, the first power conversion circuit 12 and/or the second power conversion circuit 15 may be, but is not limited to, a step-down DC-DC conversion circuit, such as a synchronous step-down DC-DC conversion circuit.

Please refer to FIG. 5 , which is a schematic diagram of the structure of the charging device provided according to other embodiments of the present application. In other embodiments, the charging device further includes a power interface 5 connected to the power input terminal VBUSIN (not shown in FIG. 5 ). The power interface 5 is used to connect to the charging power supply 6, and is used to input the first DC voltage VBUS output by the charging power supply to the power input terminal VBUSIN of the charging circuit 1. Specifically, the charging device provided in the embodiment of the present application may be, but is not limited to, a charging data cable, such as a one-to-many charging data cable. Among them, the first charging interface 2 and the second charging interface 3 may both be USB Type-C interfaces, or one of the first charging interface 2 and the second charging interface 3 may be a USB Type-C interface, the other may be a lightning interface, and the third charging interface 4 may be a Micro USB interface or a DC socket interface.

The charging power supply 6 that outputs the first DC voltage VBUS may be, but is not limited to, a power adapter, and the charging power supply 6 is used to convert AC power into the first DC voltage VBUS for output. The power input terminal VBUSIN in the charging circuit is connected to the charging power supply 6 through the power interface 5. Among them, the power interface 5 may be, but is not limited to, a USB interface. Taking the power interface 5 as an example of a USB interface, the charging power supply 6 converts AC power into a first DC voltage VBUS for output, and the first DC voltage VBUS is output to the power input terminal VBUSIN via the power lead of the USB interface. The first input terminal of the first charging path selection circuit 13 is connected to the power lead of the power interface 5, the second input terminal is connected to the voltage output terminal of the first power conversion circuit 12, and the output terminal is connected to the power lead of the first charging interface 2. The first input terminal of the second charging path selection circuit 14 is connected to the power lead of the power interface 5, the second input terminal is connected to the voltage output terminal of the first power conversion circuit 12, and the output terminal is connected to the power lead of the second charging interface 3. The switch control terminals of the first charging path selection circuit 13 and the second charging path circuit 14 are respectively connected to the charging control circuit 11. The charging control circuit 11 is a control circuit that can implement the fast charging protocol, which includes a fast charging protocol charging control chip.

As shown in FIG6 , in other embodiments, the charging device further includes a charging power supply 6 for outputting a first DC voltage VBUS. The power input terminal VBUSIN (not shown in FIG6 ) in the charging circuit 1 is directly connected to the DC voltage output terminal of the charging power supply 6 for receiving the first DC voltage VBUS. In other embodiments, the charging device may be specifically a charger with multiple charging ports, a mobile power supply, or a vehicle-mounted power supply.

Please refer to FIG. 7, which is a schematic diagram of the structure of the charging device provided according to some other embodiments of the present application. In some other embodiments, the charging circuit 1 further includes a data transmission path selection 16 connected to the power input terminal VBUSIN (not shown in FIG. 7), the first charging interface 2, and the second charging interface 3. The data transmission path selection circuit 16 is respectively connected to the power interface and each dual-path charging interface, and is used to select at least one of the two dual-path charging interfaces to transmit data with the power interface. Specifically, the charging control circuit 11 is also connected to the data transmission path selection circuit 16, and is used to control the selection state of the data transmission path selection circuit 16, so that the data transmission path selection circuit 16 selects one of the first charging interface 2 and the second charging interface 3 to connect to the power interface 5 for data transmission. Among them, the data transmission path selection circuit 16 can be a third switch circuit, and the charging control circuit 11 selects a corresponding dual-path charging interface to transmit data with the power interface 5 by controlling the switch state of the third switch circuit.

Specifically, the first end of the third switch circuit is connected to the output lead of the power interface 5, the second end is connected to the data lead of the first charging interface 2, and the third end is connected to the data lead of the second charging interface 3. When the charging control circuit 11 controls the third switch circuit to be in the first switch state, the first end of the third switch circuit is electrically connected to the second end, and the first end is electrically isolated from the third end. When the charging control circuit 11 controls the third switch circuit to be in the second switch state, the first end of the third switch circuit is electrically isolated from the second end, and the first end is electrically connected to the third end. Please refer to Figure 8, which is a structural schematic diagram of the first power conversion circuit 12 in the charging circuit provided according to some embodiments of the present application. The first power conversion circuit 12 specifically includes a power conversion chip U1 and a corresponding first peripheral circuit. Among them, the first peripheral circuit includes a first input filter circuit connected to the power pin VIN end of the power conversion chip U1, an inductor L1 connected to the switch node pin SW of the power conversion chip U1, and a first output circuit connected to the inductor L1, and a first resistor voltage divider circuit connected to the feedback pin FB of the power conversion chip U1 and the output end of the first power conversion circuit 12. The first input filter circuit includes, but is not limited to, a capacitor C1 and a capacitor C2 connected in parallel between the power pin VIN and the ground terminal. One end of the inductor L1 is connected to the switch node pin SW, and the second end is connected to the output end of the first power conversion circuit 12. The first output circuit includes an output filter capacitor connected between the output end and the ground end of the first power conversion circuit 11, such as capacitors C3 and C4. The first output circuit also includes a second resistor divider circuit connected to the output end of the first power conversion circuit 12 for collecting a signal of a second DC output voltage and inputting the collected signal OUT-DET into the charging control circuit 11. The second resistor divider circuit includes resistors R3 and R4 in FIG8, wherein the collected signal OUT-DET is output between resistors R3 and R4. Further, in order to improve the stability of the collected signal OUT-DET, the first output circuit also includes a capacitor C5 connected between the output end and the ground end of the collected signal.

The first resistor voltage divider circuit is used to feed back the voltage division signal OUT-FB of the second DC voltage VDCA to the charging control circuit 11, and includes the connection between the resistors R1 and R2 in FIG8 to output the voltage division signal OUT-FB. Further, the first resistor voltage divider circuit also includes at least one feedback adjustment resistor, and the first end of each feedback adjustment resistor is connected to the output end of the voltage division signal OUT-FB, and the second end receives a voltage division adjustment signal output by the charging control circuit 11. The charging control circuit 11 determines the allocated power of the charging interface corresponding to the first power conversion circuit 12 according to the output power of the charging power supply 6, the power of each charging interface connected to the device, and the corresponding power allocation strategy, and outputs the corresponding voltage division adjustment signal according to the allocated power to adjust the voltage division signal OUT-FB, and the power conversion chip U1 outputs the corresponding power according to the voltage division signal OUT-FB. Specifically, the feedback adjustment resistor includes the resistor R7, the resistor R8 and the resistor R9 in FIG8, and the voltage division adjustment signal includes V1-EN, V2-EN and V3-EN.

Please continue to refer to FIG8. In this embodiment, the power input terminal VBUSIN is connected to the power interface 5, and the power interface 5 is a USB interface. The power input terminal VBUSIN is specifically connected to the power lead CA-VBUS of the power interface 5, and is used to receive the first DC voltage VBUS output by the power lead CA-VBUS. The power interface 5 also includes: a positive lead CA-DP and a negative lead CA-DN in the differential data line, a configuration channel 1 lead CA-CC1, a configuration channel 2 lead CA-CC2, and a ground lead CA-GND. The power lead CA-VBUS, the negative lead CA-DN, the positive lead CA-DP, the configuration channel 1 lead CA-CC1, the configuration channel 2 lead CA-CC2, and the ground lead CA-GND are connected to the corresponding interface terminals of the charging power supply through pins TP11, TP12, TP13, TP14, TP15, and TP16, respectively. Further, the configuration channel 2 lead CA-CC2 is grounded through a resistor R6.

Please continue to refer to FIG8 . In some embodiments, the charging circuit 1 further includes a pull-down resistor R5 connected to the power input terminal VBUSIN. By setting the pull-down resistor R5, the charging circuit 1 can adapt to various types of charging power sources 6, and the discharge problem caused when the power interface 5 is connected to certain types of charging power sources 6 can be avoided.

Please refer to FIG. 9 , which is a schematic diagram of the structure of the first charging path selection circuit 13 provided according to some embodiments of the present application. In this embodiment, the first charging path selection circuit 13 includes a first switch circuit, and the first switch circuit specifically includes a transistor Q4 and a transistor Q1 connected to the power lead CB-VBUS of the first charging interface 2, a transistor Q5 connected to the transistor Q4, and a transistor Q2 and a transistor Q3 connected to the transistor Q1, respectively.

The current output end of the transistor Q4 is connected to the power lead CB-VBUS of the first charging interface 2, the current input end of the transistor Q4 receives the first DC voltage VBUS, the switch control end of the transistor Q4 is connected to the current input end of the transistor Q5, the current output end of the transistor Q5 is grounded, and the switch control end of the transistor Q5 receives the switch control signal BVBUS-EN1 (the first switch control signal of the first switch circuit) output by the charging control circuit 11.

The current output end of transistor Q1 is connected to the power lead CB-VBUS of the first charging interface 2, the current input end of transistor Q1 is connected to the current output end of transistor Q2, the current input end of transistor Q2 is connected to the output end of the first power conversion circuit 12, the switch control end of transistor Q1 is connected to the current input end of transistor Q3, the switch control end of transistor Q5 receives the switch control signal BVBUS-EN2 (the second switch control signal of the first switch circuit) output by the charging control circuit 11, and the switch control end of transistor Q2 is connected to the switch control end of transistor Q1.

When the switch control signal BVBUS-EN1 controls the transistor Q5 to be turned off and the switch control signal BVBUS-EN2 controls the transistor Q5 to be turned on, the first charging path selection circuit 13 selects the first DC voltage VBUS to be output to the first charging interface 2. When the switch control signal BVBUS-EN1 controls the transistor Q5 to be turned on and the switch control signal BVBUS-EN2 controls the transistor Q3 to be turned off, the first charging path selection circuit 13 selects the second DC voltage VDCA to be output to the first charging interface 2.

Further, please continue to refer to FIG. 9 , the first switch circuit also includes a capacitor C8 connected between the current input terminal and the switch control terminal of the transistor Q4, a resistor R13 connected between the current input terminal and the switch control terminal of the transistor Q4 and connected in parallel with the capacitor C8, and a resistor R12 connected between the switch control terminal of the transistor Q4 and the current input terminal of the transistor Q5. In addition, the first switch circuit also includes a resistor R14 connected between the current input terminal and the switch control terminal of the transistor Q1 and a voltage regulator diode D1 connected in parallel with the resistor R14.

Please continue to refer to FIG. 9 , the first charging interface 2 further includes: a positive lead CB-DP and a negative lead CB-DN in the differential data line, a configuration channel 1 lead CB-CC1, and a ground lead CB-GND. The power lead CB-VBUS, the negative lead CB-DN, the positive lead CB-DP, the configuration channel 1 lead CB-CC1, B and the ground lead CB-GND are connected to the corresponding interface terminals of the charging power source through pins TP21, TP22, TP23, TP24 and TP25 respectively.

Please refer to FIG. 10, which is a schematic diagram of the structure of the second charging path selection circuit 14 provided according to some embodiments of the present application. In this embodiment, the second charging path selection circuit 14 is a second switch circuit, and the second switch circuit specifically includes a transistor Q9 and a transistor Q6 respectively connected to the power lead CC-VBUS of the second charging interface 3, a transistor Q6 connected to the transistor Q9, and a transistor Q7 and a transistor Q8 respectively connected to the transistor Q6.

The current output end of the transistor Q9 is connected to the power lead CC-VBUS of the second charging interface 3, the current input end of the transistor Q9 receives the first DC voltage VBUS, the switch control end of the transistor Q9 is connected to the current input end of the transistor Q6, the current output end of the transistor Q6 is grounded, and the switch control end of the transistor Q6 receives the switch control signal CVBUS-EN1 (the first switch control signal of the second switch circuit) output by the charging control circuit 11.

The current output end of transistor Q6 is connected to the power lead CC-VBUS of the second charging interface 3, the current input end of transistor Q6 is connected to the current output end of transistor Q7, the current input end of transistor Q7 is connected to the output end of the first power conversion circuit 12, the switch control end of transistor Q6 is connected to the current input end of transistor Q8, the switch control end of transistor Q6 receives the second switch control signal CVBUS-EN2 (the second switch control signal of the second switch circuit) output by the charging control circuit 11, and the switch control end of transistor Q7 is connected to the switch control end of transistor Q6.

When the switch control signal CVBUS-EN1 controls the transistor Q6 to be turned off, and the switch control signal CVBUS-EN2 controls the transistor Q6 to be turned on, the second switch circuit selects the first DC voltage VBUS to be output to the second charging interface 3. When the switch control signal CVBUS-EN1 controls the transistor Q6 to be turned on, and the switch control signal CVBUS-EN2 controls the transistor Q8 to be turned off, the second switch circuit selects the second DC voltage VDCA to be output to the second charging interface 3.

Further, please continue to refer to FIG. 10 , the second switch circuit also includes a capacitor C9 connected between the current input terminal and the switch control terminal of the transistor Q9, a resistor R16 connected between the current input terminal and the switch control terminal of the transistor Q9 and connected in parallel with the capacitor C9, and a resistor R15 connected between the switch control terminal of the transistor Q9 and the current input terminal of the transistor Q6. In addition, the second switch circuit also includes a resistor R17 connected between the current input terminal and the switch control terminal of the transistor Q6 and a voltage regulator diode D2 connected in parallel with the resistor R17.

Please continue to refer to FIG. 10 , the second charging interface 3 also includes: a positive lead CC-DP and a negative lead CC-DN in the differential data line, a configuration channel 1 lead CC-CC1, and a ground lead CC-GND. The power lead CC-VBUS, the negative lead CC-DN, the positive lead CC-DP, the configuration channel 1 lead CC-CC1, B and the ground lead CC-GND are connected to the corresponding interface terminals of the charging power source through pins TP31, TP32, TP33, TP34 and TP35 respectively.

In each embodiment of the present application, the current input terminal of the transistor is one of the source terminal s and the drain terminal d, the current output terminal of the transistor is the other of the source terminal s and the drain terminal d, and the switch control terminal of the transistor is the gate terminal g. Specifically, it is determined according to the type of the transistor.

In some embodiments, one of the first charging interface 2 and the second charging interface 3 is a lightning interface. One of the first switch circuit and the second switch circuit electrically connected to the lightning interface further includes an output current detection circuit connected to the power lead of the lightning interface, and the output current detection circuit is used to detect the output current of the lightning interface and output the detection current to the charging control circuit 11. The charging control circuit 11 is used to control the current output by the first power conversion circuit 12 to the lightning interface according to the detection current of the output current detection circuit, so as to adjust the power of the lightning interface to the required power.

Please continue to refer to FIG. 10. In some embodiments of the present application, the second charging interface 3 is a lightning interface as an example. The output current detection circuit includes a diode D3 and a resistor R18. The cathode of the diode D3 is connected to the power lead CC-VBUS of the second charging interface 3, and the anode and the other end of the resistor R18 are connected to the output end of the power supply circuit of the charging control circuit 11 to receive the power supply voltage VCC-P. The detection current DET-MIC is output at the anode end of the diode D3 and sent to the charging control circuit 11.

Please refer to FIG. 11, which is a schematic diagram of the structure of a charging control circuit 11 provided according to some embodiments of the present application. The charging control circuit 11 includes a power supply circuit 111, a first signal detection circuit 112 configured for channel 1 of the first charging interface 2, a second signal detection circuit 113 configured for channel 1 of the second charging interface 3, and a charging control chip U3 and a corresponding second peripheral circuit.

The power supply circuit 111 can be a linear voltage regulator, whose input receives a first DC voltage VBUS and whose output outputs a power supply voltage VCC-P. Specifically, the power supply circuit 111 includes a linear voltage regulator chip U2, a third resistor divider circuit connected to the voltage input pin Vdd of the linear voltage regulator chip U2, and a second input filter circuit, and a filter capacitor C7 connected to the output end of the linear voltage regulator chip U2. The third resistor divider circuit is used to detect the first DC voltage VBUS and output an input detection signal IN-DET to the charging control circuit 11, which includes a resistor R10 and a resistor R11, and the connection between the resistor 10 and the resistor R11 outputs the input detection signal IN-DET. The second input filter circuit includes a capacitor C6. The output end of the power supply circuit 111 is connected to the power pin VDD of the charging control chip U3 through an RC filter circuit composed of resistors R19 and C10 in the second peripheral circuit.

The first signal detection circuit 112 includes a transistor Q11 and a resistor R22, the current input end of the transistor Q11 is connected to the configuration channel 1 lead CB-CC1 of the first charging interface 2, the current output end is used to output the first detection signal B-CC1 to the first detection pin PT3 of the charging control chip U3, and the switch control end is used to receive the first CC switch control signal CCB-CRTL output by the charging control chip U3, and is grounded through the resistor R22. Specifically, the current output end of the transistor Q11 is connected to the first detection pin PT3 of the charging control chip U3 through the RC filter circuit composed of the resistors R21 and C12 in the second peripheral circuit.

The second signal detection circuit 113 includes a transistor Q12 and a resistor R24, the current input end of the transistor Q12 is connected to the configuration channel 1 lead CC-CC1 of the second charging interface 3, the current output end is used to output the second detection signal C-CC1 to the second detection pin PT5 of the charging control chip U3, and the switch control end is used to receive the second CC switch control signal CCC-CRTL output by the charging control chip U3, and is grounded through the resistor R24. Specifically, the current output end of the transistor Q12 is connected to the second detection pin PT5 of the charging control chip U3 through the RC filter circuit composed of the resistors R23 and C13 in the second peripheral circuit.

The power lead CA-CC1 of the power interface 5 is connected to the third detection pin PT1 of the charging control chip U3 through the RC filter circuit composed of resistors R20 and C11 in the second peripheral circuit. In addition, the charging control chip U3 also includes suspended detection pins PT2, PT4 and PT6. Each detection pin (PT1, PT2, PT3, PT4, PT5 or PT6) of the charging control chip U3 is respectively connected to one end of an open-drain output resistor RD, and the other end of the open-drain output resistor RD is connected to the current input end of the open-drain output transistor QD, the current output end of the open-drain output transistor QD is grounded, and the switch control end is connected to the inverter for receiving the corresponding logic control signal. The drain output resistor RD and the open-drain output transistor QD corresponding to each detection pin are respectively integrated inside the charging control chip U3.

Further, in some embodiments, the charging control chip U3 is a fast charging control chip running a fast charging protocol. Pins PT7, PT8, PT9 and PT10 of the charging control chip U3 are respectively used to output switch control signals BVBUS-EN1, CVBUS-EN1, BVBUS-EN2 and CVBUS-EN2. Pins PT11, PT12 and PT13 of the charging control chip U3 are respectively used to receive input detection signals IN-DET, output detection signals DAC-OUT and detection current DET-MIC. Pins PT14 and PT15 of the charging control chip U3 are respectively used to output the first CC switch control signal CCB-CRTL and the second CC switch control signal CCC-CRTL. Pins PT16, PT17 and PT18 of the charging control chip U3 are respectively used to output voltage division adjustment signals V1-EN, V2-EN and V3-EN. Pins PT19 and PT20 of the charging control chip U3 are respectively used to output data selection signals SEL and enable signals OE to control the selection state of the first data transmission selection circuit 16.

Please refer to FIG. 12 . In some embodiments, the data transmission selection circuit 16 is specifically a third switch circuit. The third switch circuit includes an analog switch chip U4, a resistor R25, and a resistor R26. The connection relationship of each pin of the analog switch chip U4 is specifically shown in FIG. 12 . The third switch circuit is used to select a data lead of one of the first charging interface 2 and the second charging interface 3 to be connected to a data lead of the power interface according to the control of the charging control chip U3 .

The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (12)

1. A charging control method, comprising: Determine the current device access status of multiple charging interfaces; at least one of the multiple charging interfaces is a dual-path charging interface, and the charging path for charging the device connected to the dual-path charging interface includes a power direct charging path and a power conversion charging path; When the device access state is a first state in which a single dual-path charging interface among the multiple charging interfaces is connected to the device, the power direct charging path corresponding to the single dual-path charging interface is selected to charge the connected device of the single dual-path charging interface. 2. The charging control method according to claim 1, characterized in that the power direct charging path uses the first DC voltage output by the charging power source as the charging voltage of the connected device, and the power conversion charging path uses the second DC voltage as the charging voltage of the connected device; The second DC voltage is a voltage obtained by power conversion of the first DC voltage by the first power conversion circuit. 3. The charging control method according to claim 2, further comprising: When the device access state is the first state, the first power conversion circuit is controlled to be in a standby state. 4. The charging control method according to any one of claims 1 to 3, further comprising: When the device access state is a second state in which two dual-path charging interfaces among the multiple charging interfaces are respectively connected to the device, the power direct charging path corresponding to the first dual-path charging interface is selected to charge the access device of the first dual-path charging interface, and the power conversion charging path corresponding to the second dual-path charging interface is selected to charge the access device of the second dual-path charging interface; Among them, the first dual-path charging interface is one of the two dual-path charging interfaces whose power of the connected device meets the preset conditions, and the second dual-path charging interface is the other of the two dual-path charging interfaces. 5. The charging control method according to claim 4, characterized in that the determining the device access status of the plurality of charging interfaces comprises: When it is detected that a device is currently connected to one of the dual-path charging interfaces, determining whether another dual-path charging interface is currently connected to a device; If yes, determining that the device access state is the second state; If not, it is determined that the device access state is the first state. 6. The charging control method according to claim 4, further comprising: When the device access state is the second state, power is allocated to the charging interface currently connected to the device among the multiple charging interfaces according to a preset power allocation strategy; The preset power allocation strategy includes a strategy for giving priority to satisfying the charging power requirements of devices connected to the first dual-path charging interface. 7. The charging control method according to claim 4, characterized in that: the first dual-path charging interface is the one of the two dual-path charging interfaces with the largest power for connecting to a device; or The first dual-path charging interface is one of the two dual-path charging interfaces whose connected device has a power greater than or equal to a preset power. 8. The charging control method according to claim 7, characterized in that before selecting the power direct charging path corresponding to the first dual-path charging interface to charge the connected device of the first dual-path charging interface, it also includes: Comparing the powers of devices connected to the two dual-path charging interfaces; Determine the one of the two dual-path charging interfaces with the largest power of the connected device as the first dual-path charging interface, and determine the other of the two dual-path charging interfaces as the second dual-path charging interface. 9. The charging control method according to claim 7, characterized in that before selecting the power direct charging path corresponding to the first dual-path charging interface to charge the connected device of the first dual-path charging interface, it also includes: Determine whether the power of the access device of the two dual-path charging interfaces that is accessed later is greater than or equal to the preset power; If so, determine that the later-connected dual-path charging interface is the first dual-path charging interface, and determine that the earlier-connected dual-path charging interface of the two dual-path charging interfaces is the second dual-path charging interface. 10. The charging control method according to claim 4, characterized in that the selecting the power direct charging path corresponding to the first dual-path charging interface to charge the connected device of the first dual-path charging interface, and selecting the power conversion charging path corresponding to the second dual-path charging interface to charge the connected device of the second dual-path charging interface, comprises: Controlling the power charging path corresponding to the first dual-path charging interface to be in an on state, and the power conversion charging path corresponding to the first dual-path charging interface to be in an off state; and The power charging path corresponding to the second dual-path charging interface is controlled to be in a disconnected state, and the power conversion charging path corresponding to the second dual-path charging interface is controlled to be in a conductive state. 11. A charging device, characterized in that it comprises a plurality of charging interfaces and a charging circuit, at least one of the plurality of charging interfaces is a dual-path charging interface, and the charging circuit comprises a first power conversion circuit, a charging path selection circuit corresponding to the dual-path charging interface, and a charging control circuit connected to the selection circuit; The first power conversion circuit is used to convert a first DC voltage output by a charging power supply into a second DC voltage for output; the charging path selection circuit is respectively connected to the charging power supply, the first power conversion circuit and the corresponding dual-path charging interface, and is used to select one of the first DC voltage and the second DC voltage to output to the corresponding dual-path charging interface; The charging control circuit is respectively connected to each of the multiple charging interfaces, and is used to control the charging path selection circuit corresponding to the single dual-path charging interface to select the first DC power supply output in the first state according to the charging control method according to any one of claims 1 to 10. 12. The charging device according to claim 11, characterized in that the first charging interface and the second charging interface of the plurality of charging interfaces are respectively the dual-path charging interfaces; The charging path selection circuit corresponding to the first charging interface is a first charging path selection circuit, and the path selection circuit corresponding to the second charging interface is a second charging path selection circuit; The first charging selection circuit is connected to the charging power source, the first power conversion circuit, the first charging interface and the charging control circuit respectively, and is used to select one of the first DC voltage and the second DC voltage to be output to the first charging interface according to the control of the charging control circuit; The second charging selection circuit is respectively connected to the charging power supply, the second power conversion circuit, the second charging interface and the charging control circuit, and is used to select one of the first DC voltage and the second DC voltage to be output to the second charging interface according to the control of the charging control circuit.