CN113675901A

CN113675901A - Charging circuit, electronic device control method, charging control device, and storage medium

Info

Publication number: CN113675901A
Application number: CN202010410771.3A
Authority: CN
Inventors: 孙长宇; 王彦腾; 范杰
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-11-19

Abstract

The present disclosure relates to a charging circuit, a control method, an apparatus, and a storage medium, the circuit including: a first switch assembly having a first switch state and a second switch state; the charging control assembly is connected with the first switch assembly and is used for controlling the first switch assembly to switch between a first switch state and a second switch state; the charging control assembly comprises two current conversion units; the first battery cell is electrically connected with the charging management assembly through the first switch assembly; the second battery cell is electrically connected with the charging management assembly through the first switch assembly; when the first switch assembly is in a first switch state, the first battery cell and the second battery cell are synchronously charged through the same current conversion unit; and when the first switch assembly is in a second switch state, the first battery cell and the second battery cell are asynchronously charged through different current conversion units.

Description

Charging circuit, electronic device control method, charging control device, and storage medium

Technical Field

The present disclosure relates to the field of electronic technologies, and in particular, to a charging circuit, an electronic device control method, a charging control apparatus, and a storage medium.

Background

With the continuous development and maturation of electronic technology, electronic devices such as mobile phones, tablet computers, portable computers and the like also become essential tools for people to live and work. As the number of uses of the electronic device by the user increases, the electronic device needs to be charged frequently to ensure the electronic device can work normally due to the limited storage capacity of the battery in the electronic device.

In order to improve the cruising ability of a battery of electronic equipment, in the related art, a plurality of battery cells can be assembled in the battery of the electronic equipment, and the flexibility of charging the battery cells is poor, so that the user requirements are difficult to meet. Moreover, the safety problem caused by overhigh heat of the battery is easy to occur during charging, thereby causing potential safety hazard.

Disclosure of Invention

In view of the above, the present disclosure provides a charging circuit, an electronic device control method, a charging control apparatus, and a storage medium.

According to a first aspect of the embodiments of the present disclosure, there is provided a charging circuit, including:

a first switching assembly having a first switching state and a second switching state;

the charging control assembly is connected with the first switch assembly and is used for controlling the first switch assembly to switch between the first switch state and the second switch state; the charging control assembly comprises two current conversion units;

the first battery cell is electrically connected with the charging management assembly through the first switch assembly;

the second battery cell is electrically connected with the charging management assembly through the first switch assembly;

when the first switch assembly is in the first switch state, the first battery cell and the second battery cell are synchronously charged through the same current conversion unit;

and when the first switch assembly is in the second switch state, asynchronously charging the first battery cell and the second battery cell through different current conversion units.

According to a second aspect of the embodiments of the present disclosure, there is provided an electronic device control method, the electronic device including the charging circuit according to the first aspect of the embodiments of the present disclosure, the method including:

determining a current charging mode;

when the current charging mode is a synchronous charging mode, controlling a first switch component in the charging circuit to be switched to a first switch state;

and when the current charging mode is the asynchronous charging mode, controlling a first switch component in the charging circuit to be switched to a second switch state.

According to a third aspect of the embodiments of the present disclosure, there is provided a charge control device including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to: the executable instructions, when executed, implement the steps in the method according to the second aspect of the embodiments of the present disclosure.

According to a fourth aspect of embodiments of the present disclosure, there is provided a non-transitory computer readable storage medium having instructions which, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the steps of the method according to the second aspect of embodiments of the present disclosure.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the first switch assembly is controlled by the charging control assembly to be switched between the first switch state and the second switch state, the first battery cell and the second battery cell can be synchronously charged through the same current conversion unit, or the first battery cell and the second battery cell are asynchronously charged through different current conversion units, so that the flexibility of charging control over the first battery cell and the second battery cell is improved, and different charging requirements under different charging scenes are met.

When the first battery cell and the second battery cell are asynchronously charged through different current conversion units, the charging processes of the first battery cell and the second battery cell can be respectively controlled. Compared with the synchronous charging of the first battery cell and the second battery cell through the same current conversion unit, the asynchronous charging of the first battery cell and the second battery cell through different current conversion units can reduce the maximum temperature value of the charging circuit in the charging process, is beneficial to reducing the safety problem of the charging circuit caused by the high temperature generated in the charging process, and ensures the charging safety.

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

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a block diagram illustrating a charging circuit in accordance with an exemplary embodiment.

Fig. 2 is a block diagram illustrating another charging circuit in accordance with an example embodiment.

Fig. 3 is a block diagram illustrating yet another charging circuit in accordance with an example embodiment.

Fig. 4a is a schematic diagram illustrating a charging circuit according to an exemplary embodiment.

Fig. 4b is a schematic diagram illustrating another charging circuit according to an example embodiment.

Fig. 4c is a schematic diagram illustrating yet another charging circuit in accordance with an example embodiment.

Fig. 4d is a schematic diagram illustrating yet another charging circuit according to an example embodiment.

Fig. 4e is a schematic diagram illustrating yet another charging circuit according to an example embodiment.

Fig. 4f is a schematic diagram illustrating yet another charging circuit according to an example embodiment.

Fig. 5 is a schematic diagram illustrating an electronic device control method according to an example embodiment.

Fig. 6 is a block diagram illustrating a charge control device according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the related art, a plurality of battery cells are usually connected in series or in parallel, and the connection relationship between the plurality of battery cells cannot be switched. Taking an electronic device with two battery cells as an example, in the related art, the two battery cells cannot be switched between the synchronous charging mode and the asynchronous charging mode, and therefore, it is not beneficial to improve the control flexibility of the two battery cells.

Fig. 1 is a block diagram illustrating a charging circuit 100 according to an example embodiment. Referring to fig. 1, the charging circuit 100 includes:

a first switch assembly 110 having a first switch state and a second switch state;

a charging control assembly 120 connected to the first switch assembly 110 for controlling the first switch assembly 110 to switch between a first switch state and a second switch state; the charging control assembly 120 includes two current conversion units;

a first battery cell 130 electrically connected to the charge management assembly 120 through the first switch assembly 110;

the second battery cell 140 is electrically connected with the charge management assembly 120 through the first switch assembly 110;

when the first switching assembly 110 is in the first switching state, the first battery cell 130 and the second battery cell 140 are synchronously charged through the same current conversion unit; in the second switching state of the first switching assembly 110, the first battery cell 130 and the second battery cell 140 are asynchronously charged via different current conversion units.

Illustratively, when the first switching assembly 110 is in the first switching state, the first battery cell 130 and the second battery cell 140 are synchronously charged by the same current conversion unit, that is, the first battery cell 130 and the second battery cell 140 are in a synchronous charging mode. When the first battery cell 130 and the second battery cell 140 are charged synchronously, the charging start time of the first battery cell 130 and the charging stop time of the second battery cell 140 are the same, and the charging stop time of the first battery cell 130 and the charging stop time of the second battery cell 140 are the same.

When the first battery cell 130 and the second battery cell 140 are charged by the same current converting unit, two current converting units in the charge control assembly 120 may simultaneously charge the first battery cell 130 and the second battery cell 140. Alternatively, the first battery cell 130 and the second battery cell 140 are charged simultaneously by the same current conversion unit in the charging control assembly 120.

In the second switching state of the first switching assembly 110, the first battery cell 130 and the second battery cell 140 are asynchronously charged through different current conversion units, that is, the first battery cell 130 and the second battery cell 140 are in an asynchronous charging mode. When the first battery cell 130 and the second battery cell 140 are asynchronously charged, the charging start time of the first battery cell 130 and the charging stop time of the second battery cell 140 are different, and/or the charging stop time of the first battery cell 130 and the charging stop time of the second battery cell 140 are different.

Illustratively, the first switch assembly 110 may include: one or more switches. The switch may comprise an electromagnetic switch or a mechanical switch, etc.

Specifically, the first switch assembly 110 may include one single pole, double throw mechanical switch, or the first switch assembly 110 may include two single pole, single throw mechanical switches.

The charging control assembly 120 may change the switching state of the first switching assembly 110 by controlling the closing or opening of a switch included in the first switching assembly 110.

Specifically, taking the example that the first switch assembly 110 includes two single-pole single-throw mechanical switches, a control terminal of the first single-pole single-throw mechanical switch is connected to the charging control assembly 120, an output terminal of the first single-pole single-throw mechanical switch is connected to the first electrical core 130, a control terminal of the second single-pole single-throw mechanical switch is connected to the charging control assembly 120, and an output terminal of the second single-pole single-throw mechanical switch is connected to the second electrical core 140.

The charging control assembly 120 can control the first single-pole single-throw switch and the second single-pole single-throw switch to be closed simultaneously, and control the first single-pole single-throw switch and the second single-pole single-throw switch to be opened simultaneously, so that the first battery cell 130 and the second battery cell 140 are in a synchronous charging mode.

The charging control assembly 120 can control the closing time of the first single-pole single-throw switch to be different from the closing time of the second single-pole single-throw switch, and/or the charging control assembly 120 can control the opening time of the first single-pole single-throw switch to be different from the opening time of the second single-pole single-throw switch, so that the first battery cell 130 and the second battery cell 140 are in an asynchronous charging mode.

The first cell 130 and the second cell 140 may each include a cell for electrical energy storage. It should be noted that the first battery cell 130 may include a plurality of sub-battery cells for storing electrical energy, and the plurality of sub-battery cells may be connected in series or in parallel to form the first battery cell 130.

Similarly, the second cell 140 may also include a plurality of sub-cells for electrical energy storage, and the plurality of sub-cells may be connected in series or in parallel to form the second cell 140.

According to the embodiment of the disclosure, the charging control assembly 120 controls the first switch assembly 110 to switch between the first switch state and the second switch state, and the first battery cell 130 and the second battery cell 140 can be controlled to switch between the synchronous charging mode and the asynchronous charging mode, so that the flexibility of charging control over the first battery cell 130 and the second battery cell 140 is improved, and different charging requirements under different charging scenes are met.

In the asynchronous charging mode, the charging processes of the first cell 130 and the second cell 140 may be independently controlled. In addition, compared with the case that the first battery cell 130 and the second battery cell 140 are in the synchronous charging mode, the first battery cell 130 and the second battery cell 140 in the asynchronous charging mode can reduce the maximum heating temperature of the charging circuit in the charging process, thereby being beneficial to reducing the safety problem of the charging circuit caused by the high heating temperature and ensuring the charging safety.

In some embodiments, referring to fig. 2, the charging circuit 100 further includes:

a second switching assembly 150 connected to the first switching assembly 110, the second switching assembly 150 having a third switching state and a fourth switching state;

the charging control assembly 120 is connected with the second switch assembly 150 through the first switch assembly 110, and the charging control assembly 120 is used for controlling the second switch assembly 150 to switch between a third switch state and a fourth switch state;

a first cell 130 connected to the first switch assembly 110 via a second switch assembly 150;

a second cell 140 connected to the first switch assembly 110 via a second switch assembly 150;

in the third switching state of the second switching assembly 150, the first cell 130 and the second cell 140 are connected in series;

in a fourth switching state of the second switching assembly 150, the first cell 130 and the second cell 140 are connected in parallel.

The second switching assembly 150 may include: a plurality of switches. The switch may comprise an electromagnetic switch or a mechanical switch, etc.

Illustratively, when the first cell 130 and the second cell 140 are connected in series, the positive electrode of the first cell 130 is electrically connected to the negative electrode of the second cell 140, or the negative electrode of the first cell 130 is electrically connected to the positive electrode of the second cell 140.

When the first cell 130 and the second cell 140 are connected in parallel, the positive electrode of the first cell 130 is electrically connected to the positive electrode of the second cell 140, and the negative electrode of the first cell 130 is electrically connected to the negative electrode of the second cell 140.

When the external power source charges the first battery cell 130 and the second battery cell 140 in the charging circuit, under the condition that the charging power provided by the external power source is the same, compared with the case that the first battery cell 130 and the second battery cell 140 are connected in parallel, when the first battery cell 130 and the second battery cell 140 are connected in series, the current flowing through at least part of the transmission lines for transmitting the current in the charging circuit is smaller, so that the heating loss of at least part of the transmission lines can be reduced, the conversion rate of the electric energy provided by the external power source to the electric energy stored in the first battery cell 130 and the second battery cell 140 can be improved, the heat generated by the transmission lines can be reduced, and the charging safety accidents caused by the higher temperature of the transmission lines can be reduced.

When the first battery cell 130 and the second battery cell 140 are discharged, the whole of the first battery cell 130 and the second battery cell 140 may be used as a power supply assembly, and the power supply assembly may be used to supply power to an electronic device. When the first cell 130 and the second cell 140 are connected in series, the internal resistance of the power supply assembly is the sum of the internal resistance of the first cell 130 and the internal resistance of the second cell 140. When the first battery cell 130 and the second battery cell 140 are connected in parallel, the internal resistance of the power supply assembly is smaller than the sum of the internal resistance of the first battery cell 130 and the internal resistance of the second battery cell 140, so that compared with the series connection of the first battery cell 130 and the second battery cell 140, the discharge current of the parallel connection of the first battery cell 130 and the second battery cell 140 is larger, which is beneficial to meeting the requirement of a user for larger discharge current.

In addition, compared with the first battery cell 130 and the second battery cell 140 which are connected in series, the difference between the voltage at the two ends of the first battery cell 130 and the second battery cell 140 which are connected in parallel and the voltage of the electronic device receiving power supply is small, which is beneficial to reducing the self power consumption and heat productivity of the first battery cell 130 and the second battery cell 140 during discharging, and improving the discharging efficiency of the power supply assembly composed of the first battery cell 130 and the second battery cell 140.

Through the charging circuit 100 provided by the embodiment of the present disclosure, the first battery cell 130 and the second battery cell 140 can be controlled to be switched between series connection and parallel connection, so that the flexibility of controlling the first battery cell 130 and the second battery cell 140 is improved, the charging efficiency of the first battery cell 130 and the second battery cell 140 is further improved, and the discharging efficiency of discharging by using the first battery cell 130 and the second battery cell 140 is improved.

In some embodiments, referring to fig. 3, the charging circuit 100 includes:

a charging interface 160 for connecting an external power source and the charging control assembly 120; a charging interface 160 for transmitting a charging current provided by an external power supply to the charging control assembly 120;

the charging control assembly 120 includes:

a first current converting unit 121 for converting at least part of the charging current into a first charging current;

a second current converting unit 122 for converting at least part of the charging current into a second charging current having a current value different from the first charging current;

the distribution unit 123 is connected to the first current conversion unit 121 and the second current conversion unit 122, respectively, and is configured to distribute the first charging current and the second charging current to the first battery cell 130 and the second battery cell 140 according to at least a first switching state or a second switching state in which the first switching assembly 110 is currently located.

The charging interface 160 may include: a Universal Serial Bus (USB) interface, an Inter-Integrated Circuit Bus (I2C) interface, or the like.

When the external power source is connected to the first current converting unit 121 through the charging interface 160 and connected to the second current converting unit 121 through the charging interface 160, a first current value to which the charging current supplied from the external power source is distributed to the first current converting unit and a second current value to which the charging current supplied from the external power source is distributed to the second current converting unit are related to the current charging mode. It is noted that the first current converting unit 121 and the second current converting unit 122 are connected to the same charging interface.

Specifically, when the current charging mode is the synchronous charging mode, that is, when the first battery cell 130 and the second battery cell 140 are charged synchronously, the first current converting unit 121 and the second current converting unit 122 are connected in parallel, and a ratio of a first current value distributed to the first current converting unit 121 and a second current value distributed to the second current converting unit 122 by the charging current provided by the external power supply is approximately equal to a ratio of an internal resistance of the second current converting unit 122 and an internal resistance of the first current converting unit 121.

When the current charging mode is the synchronous charging mode, the distribution unit 123 may simultaneously distribute the first charging current and the second charging current to the first battery cell 130 and the second battery cell 140.

It can be understood that, in the synchronous charging mode, since the transmission line for transmitting the current in the charging circuit also has an internal resistance, the internal resistance of the transmission line also affects the ratio of the first current value and the second current value. Therefore, when the internal resistance of the transmission line is ignored, the ratio of the first current value and the second current value is equal to the ratio of the internal resistance of the second current converting unit 122 to the internal resistance of the first current converting unit 121 in the case where the current charging mode is the synchronous charging mode.

The distribution unit 123 may include: an Application Processor (AP), or a central processing or Application specific integrated chip, etc.

When the current charging mode is the asynchronous charging mode, the distribution unit 123 may start to distribute the first charging current to the first battery cell 130 at a first time, distribute the first charging current and the second charging current to the first battery cell 130 at a second time after a preset time period elapses since the first time, and distribute the second charging current to the second battery cell 140 at the second time.

Alternatively, when the current charging mode is the asynchronous charging mode, the distribution unit 123 may start to distribute the first charging current to the second battery cell 140 at the first time, distribute the first charging current and the second charging current to the second battery cell 140 at the second time, and distribute the second charging current to the first battery cell 130 at the second time.

During the above-mentioned preset time period from the first time, the charging current provided by the external power source may be fully distributed to the first current converting unit 121, i.e., the first current value is equal to the charging current provided by the external power source.

From the second time, it can be regarded as that the second current conversion unit 122 is connected in series with the second battery cell 140 and then connected in parallel with the first current conversion unit 121, so that the ratio of the first current value to the second current value positively correlates to the ratio of the sum of the internal resistance of the second current conversion unit 122 and the internal resistance of the second battery cell 140 to the internal resistance of the first battery cell 130.

It is to be noted that, during the preset time period from the first time, it may be considered that no current is distributed to the second battery cell 140, that is, the second battery cell 140 is not charged during the preset time period from the first time.

Alternatively, when the current charging mode is the asynchronous charging mode, the distribution unit 123 may distribute the first charging current to the second battery cell 140 at a first time, and distribute the second charging current to the first battery cell 130 at the second time.

When the current charging mode is the asynchronous charging mode and the first cell and the second cell are connected in series, the first charging current is distributed to the first cell 130 from the first time, the first charging current and the second charging current are distributed to the first cell 130 from the second time, and the second charging current is distributed to the second cell 140 from the second time.

Specifically, when the asynchronous charging mode is performed and the charging start time of the first battery cell is different from that of the second battery cell, the time when the first battery cell enters the constant current charging mode is different from that when the second battery cell enters the constant current charging mode, and therefore, the maximum value of the charging power of the external power supply for charging the first battery cell is different from the occurrence time of the maximum value of the charging power of the external power supply for charging the second battery cell.

It should be noted that, when the first battery cell and the second battery cell are charged, the charging power that can be supported by the charging adapter unit connected to the external power supply and the charging interface needs to be greater than or equal to the sum of the maximum charging power for charging the first battery cell and the maximum charging power for charging the second battery cell.

Therefore, by adopting the asynchronous charging mode, the occurrence time of the maximum charging power value for charging the first battery cell and the occurrence time of the maximum charging power value for charging the second battery cell can be staggered, so that the charging power supported by the charging adapter unit required to be used can be reduced, the charging adapter unit supporting the reduced charging power can be used for connecting an external power supply and a charging circuit while the charging speed is ensured, and the application range of the charging circuit is favorably widened.

The first current conversion unit 121 may convert the first current value into the first charging current according to a first conversion ratio, i.e., a ratio of the first current value to the first charging current is the first conversion ratio. The value of the first conversion ratio may include: 1: 1. 1: 2 or 2: 1.

the second current converting unit 122 may convert the second current value into the second charging current according to a second conversion ratio, i.e., a ratio of the second current value to the second charging current is the second conversion ratio. The values of the second conversion ratio may include: 1: 1. 1: 2 or 2: 1. it will be appreciated that the second conversion ratio may be different in value from the first conversion ratio.

The distribution unit 123 may be configured to determine the first and second conversion ratios at least according to the charging mode supported by the charging adapter unit connected to the charging interface 160 and the charging modes of the first and

second battery cells

130 and 140. Here, the charging adaptor unit serves to connect the charging interface 160 and an external power source.

Specifically, when the output voltage is less than or equal to the first voltage in the charging mode supported by the charging adaptation unit, and the first battery cell and the second battery cell are in the asynchronous charging mode, the first conversion ratio may be 1: 1, the second conversion ratio may be 1: 2. here, the first voltage may be 3 volts or 5 volts, etc.

When the output voltage is greater than the first voltage in the charging mode supported by the charging adaptation unit, and the first battery cell and the second battery cell are in the asynchronous charging mode, the first conversion ratio may be 2: 1, the second conversion ratio may be 1: 1.

it should be noted that, when the output voltage in the charging mode supported by the charging adaptor unit is greater than the first voltage, the charging adaptor unit may be considered to support high-voltage output charging, and in this case, the charging mode supported by the charging adaptor unit may include a Power Delivery (PD) fast charging mode.

In the embodiment of the present disclosure, the first current conversion unit 121 converts the charging current into the first charging current, and the second current conversion unit 122 converts the charging current into the second charging current having a current value different from the first charging current, and then the first charging current and the second charging current are distributed in the first battery cell 130 and the second battery cell 140 according to at least the synchronous charging mode or the asynchronous charging mode in which the first battery cell 130 and the second battery cell 140 are currently located, and the current value for charging the first battery cell 130 and the second battery cell 140 can be selected according to the current charging mode, so that the flexibility of charging control is improved, and the user experience is favorably satisfied.

In addition, the first conversion ratio and the second conversion ratio can be selected, the magnitudes of the first charging current and the second charging current can be changed, and the distribution unit 123 can be used for charging the first battery cell 130 and the second battery cell 140 with different currents, so that the charging speed is ensured to be high.

In some embodiments, the distribution unit 123 is specifically configured to transmit the first charging current and the second charging current to the first battery cell 130 and transmit the first charging current and the second charging current to the second battery cell 140 when the first switching assembly 110 is in the first switching state and the first battery cell 130 and the second battery cell 140 are connected in series.

For the first cell 130 and the second cell 140 in the synchronous charging mode and connected in series, the current value for charging the first cell 130 may be equal to the current value for charging the second cell 140. For example, the current value of charging the first cell 130 and the current value of charging the second cell 140 may both be equal to the sum of the first charging current and the second charging current.

In the embodiment of the present disclosure, by enabling the first battery cell 130 and the second battery cell 140 to be in a synchronous charging mode through the first switch assembly 110, and connecting the first battery cell 130 and the second battery cell 140 in series, the first charging current and the second charging current may be distributed to the second battery cell 140 while the first charging current and the second charging current are distributed to the first battery cell 130.

It can be appreciated that, compared to charging the first battery cell 130 and the second battery cell 140 only by the first charging current or the second charging current, the embodiments of the present disclosure are beneficial to increase the current value for charging the first battery cell 130 and the second battery cell 140, and thus increase the charging efficiency.

In some embodiments, the distribution unit 123 is further specifically configured to distribute, when the first switch assembly 110 is in the first switch state and the first battery cell 130 and the second battery cell 140 are connected in parallel, one half of the sum of the first charging current and the second charging current to the first battery cell 130, and one half of the sum of the first charging current and the second charging current to the second battery cell 140.

In the embodiment of the present disclosure, when the first battery cell 130 and the second battery cell 140 are in the synchronous charging mode, and the first battery cell 130 and the second battery cell 140 are connected in parallel, one half of the sum of the first charging current and the second charging current is allocated to the first battery cell 130, and one half of the sum of the first charging current and the second charging current is allocated to the second battery cell 140, compared with the first battery cell 130 and the second battery cell 140 which are in the synchronous charging mode and connected in series, the magnitude of current in the charging circuit can be reduced, heat generated in the charging circuit is reduced, and safety of the charging process is improved.

In some embodiments, the distribution unit 123 is further configured to obtain the cycle count of the first battery cell 130 and the cycle count of the second battery cell 140, and distribute the first charging current and the second charging current according to at least the cycle count of the first battery cell 130 and the cycle count of the second battery cell 140, and the switching state of the first switching assembly 110.

In practical applications, when the first battery cell 130 and the second battery cell 140 are charged, if the external power supply charges the first battery cell 130 and the second battery cell 140 at the same time, it may take a long time to complete the charging of the first battery cell 130 and the second battery cell 140. Therefore, one of the first battery cell 130 and the second battery cell 140 may be selected as a key charging target, and a larger current is distributed to the key charging target for charging, or the key charging target is charged first, so as to achieve the purpose of quickly charging the key charging target.

It can be understood that, while the quick charge is completed, the time for powering the electronic device by using the battery cell is longer after the user wants to complete the charging of the battery cell once. Namely, it is desirable that the interpolation between the actual capacity and the rated capacity of the battery cell after one-time charging is small. The actual capacity of the battery cell after one-time charging is related to the aging degree of the battery cell, and the aging degree of the battery cell can be represented by the cycle number of the battery cell or the internal resistance of the battery cell.

Therefore, the embodiment of the disclosure may compare the aging degree of the first battery cell 130 with the aging degree of the second battery cell 140 by using the acquired cycle number of the first battery cell 130 and the cycle number of the second battery cell 140, select a key charging target, and set a charging mode.

Specifically, the distribution unit 123 is configured to distribute the first charging current and the second charging current to the first battery cell 130 and distribute the second charging current to the second battery cell 140 when the first switch assembly 110 is in the second switch state, the first battery cell 130 and the second battery cell 140 are connected in series, and the cycle number of the first battery cell 130 is less than or equal to the cycle number of the second battery cell 140;

the distribution unit 123 is further configured to distribute a second charging current to the first battery cell 130 and distribute the first charging current and the second charging current to the second battery cell 140 when the first switch assembly 110 is in the second switch state, the first battery cell 130 and the second battery cell 140 are connected in series, and the cycle number of the first battery cell 130 is greater than that of the second battery cell 140.

When the cycle number of the first battery cell 130 is less than the cycle number of the second battery cell 140, it may be considered that the aging degree of the first battery cell 130 is less than the aging degree of the second battery cell 140, and therefore, when the rated capacity of the first battery cell 130 is the same as the rated capacity of the second battery cell 140, the actual capacity of the first battery cell 130 when the charging of the first battery cell 130 is completed is greater than the actual capacity of the second battery cell 140 when the charging of the second battery cell 140 is completed, so that the duration of the first battery cell 130 after the charging of the first battery cell 130 is completed is greater than the duration of the second battery cell 140 after the charging of the second battery cell 140 is completed, and the first battery cell may be selected as a key charging target.

In the embodiment of the present disclosure, by acquiring the cycle number of the first battery cell 130 and the cycle number of the second battery cell 140, the charge capacity actually stored when the first battery cell 130 completes charging and the charge capacity actually stored when the second battery cell 140 completes charging can be determined, and the charging scheme for the first battery cell 130 and the second battery cell 140 is set according to the acquired cycle number, so that while the charging speed is ensured, the sum of the duration of the first battery cell 130 and the duration of the second battery cell 140 after charging is ensured to meet the user demand.

In some embodiments, the distribution unit 123 is further specifically configured to distribute the first charging current to the first battery cell 130 and distribute the second charging current to the second battery cell 140 when the first switch assembly 110 is in the second switch state and the first battery cell 130 and the second battery cell 140 are connected in parallel.

When the first battery cell 130 and the second battery cell 140 are in the second switching state of the first switching assembly 110, and the first battery cell 130 and the second battery cell 140 are connected in parallel, the charging process of the first battery cell 130 and the charging process of the second battery cell 140 can be controlled respectively, which is beneficial to improving the flexibility of the charging control of the first battery cell 130 and the second battery cell 140.

In some embodiments, the allocating unit 123 is configured to, in the second switching state of the first switching assembly 110, determine a charging sequence for allocating the first charging current to the first battery cell 130 and allocating the second charging current to the second battery cell 140 according to the cycle number of the first battery cell 130 and the cycle number of the second battery cell 140; and sequentially distributes the first charging current to the first cell 130 and the second charging current to the second cell 140 according to the charging sequence.

The charging sequence is a chronological sequence of the start of the distribution of the first charging current to the first cell 130 and the start of the distribution of the second charging current to the second cell 140.

Specifically, the charging sequence may include: a first order and a second order.

When the charging sequence is the first sequence, the first charging current is first distributed to the first cell 130, and after the first cell 130 is charged with the first charging current for a period of time, the distribution of the second charging current to the second cell 140 is started. It is to be noted that, when the second battery cell 140 is charged with the allocated second charging current, the first charging current may still be allocated to the first battery cell 130, or the allocation of the first charging current to the first battery cell 130 may be stopped.

When the charging sequence is the second sequence, the second charging current is first distributed to the second battery cell 140, and after the second battery cell 140 is charged with the second charging current for a period of time, the distribution of the first charging current to the first battery cell 130 is started. It is to be noted that, when starting to charge the first battery cell 130 with the allocated first charging current, the second charging current may still be allocated to the second battery cell 140, or the allocation of the second charging current to the second battery cell 140 may be stopped.

Exemplarily, the allocating unit 123 is configured to determine the charging sequence according to the cycle count of the first battery cell 130 and the cycle count of the second battery cell 140 in the second switching state of the first switching assembly 110, where the cycle count is inversely related to the charging sequence.

The cycle number of the battery cell is positively correlated with the aging degree of the battery cell. Along with the increase of the cycle number of the battery cell, the aging degree of the battery cell is increased, the difference value between the actual capacity and the rated capacity of the battery cell is increased when the battery cell is charged, and the endurance time of the battery cell after the charging is finished is shortened.

When the cycle number of the first cell 130 is less than or equal to the cycle number of the second cell 140, the charging sequence may be a first sequence indicating that the first cell is a previously charged cell and the second cell is a subsequently charged cell.

When the cycle number of the first cell 130 is greater than or equal to the cycle number of the second cell 140, the charging sequence may be a second sequence indicating that the first cell is a later-charged cell and the second cell is a former-charged cell.

Specifically, when the cycle number of the first battery cell 130 is less than the cycle number of the second battery cell 140, it may be considered that the aging degree of the first battery cell 130 is less than the aging degree of the second battery cell 140, so that the endurance time of the first battery cell 130 after the charging is completed is longer than the endurance time of the second battery cell 140 after the charging is completed. At this time, it is optional to charge the first battery cell 130 first and then charge the second battery cell 140. I.e., the charging sequence is first cell 130 in front and second cell 140 in back.

When the number of cycles of the first cell 130 is equal to the number of cycles of the second cell 140, the degree of aging of the first cell 130 may be considered to be equal to the degree of aging of the second cell 140. At this time, the first cell 130 may be charged first, and then the second cell 140 may be charged. I.e., the charging sequence is first cell 130 in front and second cell 140 in back.

When the cycle number of the first battery cell 130 is greater than the cycle number of the second battery cell 140, it can be considered that the aging degree of the first battery cell 130 is greater than the aging degree of the second battery cell 140, so that the endurance time of the first battery cell 130 after the first battery cell 130 completes charging is shorter than the endurance time of the second battery cell 140 after the second battery cell 140 completes charging. At this time, it is optional to charge the second battery cell 140 first and then charge the first battery cell 130. I.e., the charging sequence is first cell 130 after and second cell 140 before.

The charging circuit of the embodiment of the disclosure determines the charging sequence through the cycle times of the battery cells, and can set different charging sequences for the battery cells with different cycle times, so that a time delay exists between the time of starting charging of the first battery cell and the time of starting charging of the second battery cell, and then the time of occurrence of the maximum charging power value when the external power source charges the first battery cell and the time of occurrence of the maximum charging power value when the external power source charges the second battery cell are staggered, and the temperature of the charging circuit is reduced.

In some embodiments, the distribution unit 123 is configured to, when distributing the first charging current to the first cell 130 and distributing the second charging current to the second cell 140 according to the charging sequence, detect a voltage of a cell to which the charging current is distributed first; and distributing charging current to the cells charged later when the detected voltage reaches a preset voltage.

Taking the charging sequence as a phenomenon that the first battery cell 130 distributes the first charging current and then distributes the second charging current to the second battery cell 140 as an example, the first current conversion unit 121 may output the first charging current to the first battery cell 130 at a first time to perform trickle charging on the first battery cell 130, and the distribution unit 123 detects the voltage of the first battery cell 130.

When the voltage of the first battery cell 130 reaches the preset voltage, the first battery cell 130 may enter a state of being charged with a constant current, and the second current conversion unit 122 outputs a reduced second charging current to the second battery cell 140, so as to pre-charge the second battery cell 140 in a trickle charge mode.

For example, the preset voltage may be set according to the property of the cell to which the charging current is first distributed. For example, when the cell to which the charging current is first distributed is a first cell and the first cell is a lithium ion cell, the preset voltage may be 2.5 volts, 3 volts, 3.5 volts, or the like.

When the first charging current is continuously distributed to the first battery cell 130, so that the first battery cell 130 enters a state of being charged at a constant voltage, the second current conversion unit 122 may output a second charging current with a constant current magnitude to charge the second battery cell 140, so that the second battery cell 140 enters a state of being charged at a constant current.

It is noted that the first current converting unit 121 may communicate with the second current converting unit 122. For example, the first current converting unit 121 and the second current converting unit 122 may communicate through a two-wire serial bus (I2C). Also, the first current converting unit 121 may be set as a master, and the second current converting unit 122 may be set as a slave. In this way, the first current conversion unit 121 may transmit instruction information to start charging the second battery cell 140 to the second current conversion unit 122, and the second current conversion unit 122 starts distributing the second charging current to the second battery cell 140 upon receiving the instruction information.

In the embodiment of the disclosure, the voltage of the battery cell to which the charging current is firstly distributed is detected, and the charging current is distributed to the battery cell to be charged later when the detected voltage reaches the preset voltage, so that the method is simple, the time for distributing the charging current to the battery cell to be charged later can be accurately controlled, the occurrence time of the maximum heating temperature of the battery cell to which the charging current is firstly distributed and the occurrence time of the maximum heating temperature of the battery cell to be charged later can be staggered, and the temperature of the charging circuit can be reduced.

In some embodiments, as shown with reference to fig. 4a, the first switch assembly 110 includes: a first end 111, a second end 112 and a third end 113;

the first end 111 is electrically connected to the first current converting unit 121;

the second end 112 is electrically connected to the second current converting unit 122, and the second end 112 is electrically connected to the distributing unit 123;

the third terminal 113 is electrically connected with the distribution unit 123;

wherein, in a first switching state of the first switching assembly 110, the first end 111 and the second end 112 are connected;

in the second switching state of the first switching assembly 110, the first terminal 111 and the third terminal 113 are connected.

Illustratively, the first switch assembly 110 may comprise a single pole, double throw switch.

In the first switching state of the first switching assembly, as shown with reference to fig. 4a, the first end 111 and the second end 112 are connected, and the first battery cell 130 and the second battery cell 140 are in the synchronous charging mode.

In the second switching state of the first switching assembly 110, referring to fig. 4b, the first terminal 111 and the third terminal 113 are connected, and the first battery cell 130 and the second battery cell 140 are in the asynchronous charging mode.

In some embodiments, referring to fig. 4a, when the charging circuit 100 includes the second switching component, the second switching component 150 electrically connected to the distribution unit 123 may include: a first switching unit 151, a second switching unit 152, a third switching unit 153, a fourth switching unit 154, and a fifth switching unit 155;

the first switching unit 151 includes: a first control terminal 1511, a first output terminal 1512, a second control terminal 1513, and a second output terminal 1514; the first control end 1511 is connected to the third end 113 of the first switch assembly 110, the first output end 1512 is connected to the positive electrode of the first battery cell 130, the second control end 1513 is connected to the second current conversion unit 122, and the second output end 1514 is connected to the positive electrode of the second battery cell 140;

the control end of the second switch unit 152 is electrically connected with the positive electrode of the first battery cell 130, and the output end of the second switch unit 152 is electrically connected with the negative electrode of the second battery cell 140;

a control end of the third switching unit 153 is electrically connected with a negative electrode of the first battery cell 130, and an output end of the third switching unit 153 is electrically connected with a positive electrode of the second battery cell 140;

the control end of the fourth switching unit 154 is connected to the negative electrode of the first battery cell 130, and the output end of the fourth switching unit 154 is grounded;

the control end of the fifth switching unit 155 is connected to the negative electrode of the second electric core 140, and the output end of the fifth switching unit 155 is grounded.

The first switching unit 151 may include two single-pole double-throw switches. The second, third, fourth, and

fifth switching units

152, 153, 154, and 155 may each include: single pole single throw switch. The single pole double throw switch and the single pole single throw switch may include: a mechanical switch or an electromagnetic switch, etc.

In some embodiments, referring to fig. 4a, in the synchronous charging mode, when the first battery cell 130 and the second battery cell 140 are connected in series, the first terminal 111 of the first switch assembly 110 is connected to the second terminal 112, the first control terminal 1511 is connected to the first output terminal 1512, the second control terminal 1513 is connected to the second output terminal 1514, the second switch unit 152 is closed, the third switch unit 153 is opened, the fourth switch unit 154 is closed, and the fifth switch unit 155 is opened.

For example, referring to fig. 4a, the distribution unit 123 distributes a first charging current and a second charging current to the first battery cell 130, and the distribution unit 123 distributes the first charging current and the second charging current to the second battery cell 140.

At this time, for a power supply assembly composed of the first battery cell 130 and the second battery cell 140 connected in series, the first battery cell 130 is located at the cathode of the power supply assembly, and the second battery cell 140 is located at the anode of the power supply assembly.

When the first battery cell 130 and the second battery cell 140 are in the synchronous charging mode, and the first battery cell 130 and the second battery cell 140 are connected in series, the first battery cell 130 and the second battery cell 140 connected in series may be simultaneously charged in a synchronous manner through the first current converting unit 121 and the second current converting unit 122 connected in parallel.

In some embodiments, referring to fig. 4b, in the asynchronous charging mode, when the first battery cell 130 and the second battery cell 140 are connected in series, the first terminal 111 of the first switch assembly 110 is connected to the third terminal 113, the first control terminal 1511 is connected to the first output terminal 1512, the second control terminal 1513 is connected to the second output terminal 1514, the second switch unit 152 is closed, the third switch unit 153 is opened, the fourth switch unit 154 is closed, and the fifth switch unit 155 is opened.

For example, referring to fig. 4b, the distribution unit 123 distributes the first and second charging currents to the first battery cell 130, and the distribution unit 123 distributes the second charging current to the second battery cell 140. For a power supply assembly consisting of a first cell 130 and a second cell 140 connected in series, the first cell 130 is located at the cathode of the power supply assembly, and the second cell 140 is located at the anode of the power supply assembly.

Referring to fig. 4b, when the first switch assembly 110 is in the second switch state and the second switch assembly 150 is in the third switch state, the first charging current converted by the first current conversion unit 121 may be distributed to only the first battery cell 130 through the distribution unit 123, so as to implement asynchronous charging control of the first battery cell 130 by the first current conversion unit 121.

Specifically, referring to fig. 4b, when the first charging current is greater than 0 and the second charging current is 0, the external power supply charges only the first battery cell 130, but does not charge the second battery cell 140, so that asynchronous charging control of the first battery cell 130 by the first current conversion unit 121 is realized.

When performing asynchronous charge control on the first battery cell 130 and the second battery cell 140, the first current conversion unit 121 may control the speed of charging the first battery cell 130 by changing the value of the first charging current, without affecting the current value of charging the second battery cell 140.

It can be understood that, since the input terminal of the first current converting unit 121 and the input terminal of the second current converting unit 122 are both electrically connected to the charging interface 150, the input terminal voltage of the first current converting unit 121 is the same as the input terminal voltage of the second current converting unit 122.

It is to be noted that, when the distribution unit 123 distributes the first charging current and the second charging current to the first battery cell 130 and the distribution unit 123 distributes the second charging current to the second battery cell 140, the negative electrode voltage of the second battery cell 140 is correlated with the output terminal voltage of the first current conversion unit 121 and the positive electrode voltage of the first battery cell 130 is correlated with the output terminal voltage of the first current conversion unit 121. Since the negative electrode of the second battery cell 140 is connected to the positive electrode of the first battery cell 130, in order to ensure the formation of the charging loop, the voltage of the positive electrode of the first battery cell 130 may be equal to the voltage of the negative electrode of the second battery cell 140 by adjusting the first conversion ratio of the first current conversion unit 121 and the second conversion ratio of the second current conversion unit 122.

For example, the first conversion ratio of the first current conversion unit 121 may be controlled to be 2: 1, and controls the second conversion ratio of the second current converting unit 122 to be 1: 1, so that the voltage of the positive electrode of the first battery cell 130 is equal to the voltage of the negative electrode of the second battery cell 140, to ensure that the distribution unit 123 can distribute the first charging current and the second charging current to the first battery cell 130 and distribute the second charging current to the second battery cell 140.

In some embodiments, referring to fig. 4c, in the asynchronous charging mode, when the first battery cell 130 and the second battery cell 140 are connected in series, the first terminal 111 of the first switch assembly is connected to the third terminal 113, the first control terminal 1511 is connected to the second output terminal 1514, the second control terminal 1513 is connected to the first output terminal 1512, the second switch unit 152 is opened, the third switch unit 153 is closed, the fourth switch unit 154 is opened, and the fifth switch unit 155 is closed.

For example, referring to fig. 4c, the distribution unit 123 distributes the second charging current to the first battery cell 130, and the distribution unit 123 distributes the first charging current and the second charging current to the second battery cell 140. At this time, for a power supply assembly composed of the first battery cell 130 and the second battery cell 140 connected in series, the first battery cell 130 is located at an anode of the power supply assembly, and the second battery cell 140 is located at a cathode of the power supply assembly.

Referring to fig. 4c, when the first switch assembly 110 is in the second switch state and the second switch assembly 150 is in the third switch state, the asynchronous charging control of the second battery cell 140 by the first current conversion unit 121 is implemented.

Specifically, referring to fig. 4c, when the first charging current is equal to 0 and the second charging current is greater than 0, the external power supply charges only the second battery cell 140 without charging the first battery cell 130, so that asynchronous charging control of the first current conversion unit 121 on the second battery cell 140 is realized.

In some embodiments, referring to fig. 4d, in the synchronous charging mode, when the first battery cell 130 and the second battery cell 140 are connected in parallel, the first terminal 111 of the first switch assembly is connected to the second terminal 112, the second control terminal 1513 is connected to the first output terminal 1512, the second control terminal 1513 is connected to the second output terminal 1514, the second switch unit 152 is open, the third switch unit 153 is open, the fourth switch unit 154 is closed, and the fifth switch unit 155 is closed.

For example, referring to fig. 4d, the distribution unit 123 distributes one-half of the sum of the first charging current and the second charging current to the first battery cell 130, and the distribution unit 123 distributes one-half of the sum of the first charging current and the second charging current to the second battery cell 140. In this manner, the 4d can synchronously charge the first battery cell 130 and the second battery cell 140 connected in parallel through the first current converting unit 121 and the second current converting unit 122 connected in parallel.

In some embodiments, referring to fig. 4e, in the asynchronous charging mode, when the first cell 130 and the second cell 140 are connected in parallel, the first terminal 111 of the first switch assembly is connected to the third terminal 113, the first control terminal 1511 is connected to the first output terminal 1512, the second control terminal 1513 is connected to the second output terminal 1514, the second switch unit 152 is open, the third switch unit 153 is open, the fourth switch unit 154 is closed, and the fifth switch unit 155 is closed.

For example, referring to fig. 4e, the distribution unit 123 distributes a first charging current to the first battery cell 130, and the distribution unit 123 distributes a second charging current to the second battery cell 140. In this way, the first current conversion unit 121 can independently charge the first battery cell 130, and the second current conversion unit 122 can independently charge the second battery cell 140.

Referring to fig. 4e, when the distribution unit 123 distributes the first charging current to the first battery cell 130 and the distribution unit 123 distributes the second charging current to the second battery cell 140, the charging process of the first battery cell 130 may be controlled by controlling the magnitude or output time of the first charging current converted by the first current conversion unit 121.

In addition, the charging process of the second battery cell 140 may also be controlled by controlling the magnitude or the output time of the second charging current converted by the second current conversion unit 122. It is noted that the magnitudes of the first charging current and the second charging current may vary.

In some embodiments, referring to fig. 4f, in the asynchronous charging mode, when the first cell 130 and the second cell 140 are connected in parallel, the first terminal 111 of the first switch assembly is connected to the third terminal 113, the first control terminal 1511 is connected to the second output terminal 1514, the second control terminal 1513 is connected to the first output terminal 1512, the second switch unit 152 is open, the third switch unit 153 is open, the fourth switch unit 154 is closed, and the fifth switch unit 155 is closed.

For example, referring to fig. 4f, the distribution unit 123 distributes the second charging current to the first battery cell 130, and the distribution unit 123 distributes the first charging current to the second battery cell 140. In this way, the first current conversion unit 121 can independently charge the second battery cell 140, and the second current conversion unit 122 can independently charge the first battery cell 130.

Through the charging circuit 100 provided by the embodiment of the disclosure, the switching between the synchronous charging mode and the asynchronous charging mode of the first battery cell 130 and the second battery cell 140 can be realized, and the switching between the series connection and the parallel connection of the first battery cell 130 and the second battery cell 140 can also be realized, so that the manner of charging the electronic device including the charging circuit provided by the embodiment of the disclosure is more flexible.

For example, when the first battery cell 130 and the second battery cell 140 need to be rapidly charged, the first battery cell 130 and the second battery cell 140 may be connected in series, and the first battery cell 130 and the second battery cell 140 are charged in a synchronous charging mode.

It should be noted that, when the first battery cell 130 and the second battery cell 140 are in the synchronous charging mode, the time when the first battery cell 130 and the second battery cell 140 start to be charged with a constant current may be the same, and the time when the first battery cell 130 and the second battery cell 140 start to be charged with a constant voltage may also be the same, so that the time when the first battery cell 130 and the second battery cell 140 reach the maximum charging power and the time when the heating temperature is the highest are also the same, and the thermal power consumption of the first battery cell 130 and the thermal power consumption of the second battery cell 140 in the charging circuit are overlapped, which easily causes a safety problem in the charging circuit.

Therefore, the first battery cell 130 and the second battery cell 140 may be in an asynchronous charging mode in the embodiment of the present disclosure, for example, the first battery cell 130 may be charged first, the second battery cell 140 may be charged after a time delay from the time when the first battery cell 130 starts to be charged, the time when the first battery cell 130 reaches the maximum charging power and the time when the first battery cell 140 reaches the maximum charging power point may be staggered, which is beneficial to reducing the maximum value of the thermal power consumption in the charging circuit, and further reduces the maximum value of the heating temperature in the charging process, reduces the requirement for the heat dissipation capability of the charging circuit and the difficulty of the thermal stack design of the first battery cell 130 and the second battery cell 140, and ensures the charging safety and the charging effect.

Fig. 5 is a flowchart illustrating a method for controlling an electronic device that may include a charging circuit provided according to an exemplary embodiment of the present disclosure. Referring to fig. 5, the method includes the steps of:

s100: determining a current charging mode;

s210: when the current charging mode is the synchronous charging mode, controlling a first switch component in the charging circuit to be switched to a first switch state;

s220: and when the current charging mode is the asynchronous charging mode, controlling a first switch component in the charging circuit to be switched into a second switch state.

The electronic device may include: smart phones, tablet computers, smart bracelets, notebook computers or desktop computers, and the like.

In S100, the current charging mode may be determined according to the ambient temperatures of the first battery cell and the second battery cell.

Specifically, when the ambient temperature is less than or equal to the preset temperature, it may be determined that the current charging mode is a synchronous charging mode, so as to simultaneously charge the first electric core and the second electric core, and compared with the asynchronous charging mode, the amount of charge stored in the first electric core and the amount of charge stored in the second electric core may be increased by using the synchronous charging mode under the condition of the same charging duration. Here, the preset temperature may be equal to 15 degrees celsius, or 20 degrees celsius, or the like.

When the ambient temperature is higher than the preset temperature, the current charging mode can be determined to be the asynchronous charging mode, so that the time when the first battery cell reaches the maximum heat power consumption and the time when the second battery cell reaches the maximum heat power consumption are staggered, safety accidents caused by overhigh heating temperature are reduced, and the charging safety is ensured.

Alternatively, in S100, the current charging mode may also be determined according to a charging mode supported by a charging adaptor unit connected to the charging circuit.

Specifically, when the output voltage of the charging mode supported by the charging adaptor unit is less than or equal to the first voltage, the charging mode supported by the charging adaptor unit may be considered to not include the fast charging mode, and in order to implement fast charging of the first battery cell and the second battery cell, the first battery cell and the second battery cell may be charged in the asynchronous charging mode, that is, the current charging mode is determined to be the asynchronous charging mode. The first voltage may comprise 3 volts or 5 volts, etc.

When the output voltage of the charging mode supported by the charging adapter unit is greater than the first voltage, the charging mode supported by the charging adapter unit may be considered to include a fast charging mode, and at this time, the first battery cell and the second battery cell may be simultaneously charged in a synchronous charging mode. The fast charge mode may include: PD fast charge mode or QC fast charge mode, etc.

Compared with the method for fixedly charging the first battery cell and the second battery cell in the synchronous charging mode or the method for fixedly charging the first battery cell and the second battery cell in the asynchronous charging mode, in the embodiment of the disclosure, the current charging mode is determined, the first switch assembly is controlled to be in the first switch state when the current charging mode is the synchronous charging mode, and the first switch assembly is controlled to be in the second switch state when the current charging mode is the asynchronous charging mode, so that the first switch assembly is controlled to be switched between the first switch state and the second switch state, thereby being beneficial to improving the flexibility of charging control over the first battery cell and the second battery cell and meeting different charging requirements under different charging scenes.

In some embodiments, the method further comprises:

and controlling a first charging current obtained by converting the first current conversion unit and a second charging current obtained by converting the second current conversion unit in the charging circuit to be distributed to the first battery cell and the second battery cell according to the current charging mode, the cycle frequency of the first battery cell and the cycle frequency of the second battery cell.

The cycle number of the first cell may be used to reflect the aging degree of the first cell, and the cycle number of the second cell may be used to reflect the aging degree of the first cell and the aging degree of the second cell. It can be understood that, as the degree of aging of the cell increases, the difference between the actual capacity and the rated capacity of the cell after the cell is charged increases, and the endurance time of the cell after the cell is charged decreases.

Therefore, the aging degree of the first battery cell and the aging degree of the second battery cell can be judged according to the cycle number of the first battery cell and the cycle number of the second battery cell, and then the charging scheme is set, so that the duration of the charging after the charging is finished can be ensured to meet the user demand.

Specifically, when the current charging mode is a synchronous charging mode, the first battery cell and the second battery cell are connected in series, and the cycle number of the first battery cell is less than or equal to the cycle number of the second battery cell, the first charging current and the second charging current are distributed to the first battery cell, and the second charging current is distributed to the second battery cell.

And when the current charging mode is a synchronous charging mode, the first battery cell and the second battery cell are connected in series, and the cycle number of the first battery cell is greater than that of the second battery cell, distributing the second charging current to the first battery cell, and distributing the first charging current and the second charging current to the second battery cell.

When the cycle number of the first battery cell is less than that of the second battery cell, it can be considered that the aging degree of the first battery cell is less than that of the second battery cell, and therefore, when the rated capacity of the first battery cell is the same as that of the second battery cell 140, the actual capacity of the first battery cell after charging is greater than that of the second battery cell after charging is completed, so that the endurance time of the first battery cell 130 after charging is longer than that of the second battery cell after charging is completed.

Therefore, when the cycle number of the first battery cell is smaller than that of the second battery cell, the first charging current and the second charging current are distributed to the first battery cell, and the second charging current is distributed to the second battery cell, so that the charging speed of the first battery cell is improved. And compared with the method that the first charging current and the second charging current are distributed to the second electric core, the method that the second charging current is distributed to the first electric core is beneficial to improving the actual charge capacity stored in the first electric core and the second electric core in the same charging time period and prolonging the endurance time period.

In some embodiments, the controlling, according to the current charging mode, the cycle number of the first battery cell and the cycle number of the second battery cell, a first charging current converted by a first current conversion unit in the charging circuit and a second charging current converted by a second current conversion unit to be allocated to the first battery cell and the second battery cell includes:

when the current charging mode is an asynchronous charging mode, determining a charging sequence for distributing a first charging current to the first battery cell and distributing a second charging current to the second battery cell according to the cycle times of the first battery cell and the cycle times of the second battery cell;

and according to the charging sequence, sequentially distributing a first charging current to the first battery cell and distributing a second charging current to the second battery cell.

The charging sequence may include: a first order and a second order.

When the charging sequence is the first sequence, the first charging current is first distributed to the first cell, and after the first cell is charged with the first charging current for a period of time, the second charging current is distributed to the second cell. It is to be noted that, when the second cell is charged with the allocated second charge current, the first charge current may still be allocated to the first cell, or the allocation of the first charge current to the first cell may be stopped.

When the charging sequence is the second sequence, the second charging current is first distributed to the second cell, and after the second cell is charged with the second charging current for a period of time, the first charging current is distributed to the first cell. It is to be noted that, when starting charging of the first cell with the allocated first charging current, the second charging current may still be allocated to the second cell, or the allocation of the second charging current to the second cell may be stopped.

Illustratively, the magnitude of the number of cycles is inversely related to the charging sequence.

Because the aging degree of the battery cell is increased along with the increase of the cycle times of the battery cell, when the aging degree of the battery cell is gradually increased, the difference value between the actual capacity and the rated capacity of the battery cell is increased when the battery cell is charged, and the endurance time of the battery cell after the charging is finished is shortened.

When the cycle number of the first battery cell is smaller than that of the second battery cell, the aging degree of the first battery cell can be considered to be smaller than that of the second battery cell, so that the endurance time of the first battery cell after the charging is completed is longer than that of the second battery cell after the charging is completed. At this time, the first battery cell can be charged first, and then the second battery cell can be charged. That is, the charging sequence is first cell before the second cell after the first cell.

When the cycle number of the first cell is equal to that of the second cell, the aging degree of the first cell may be considered to be equal to that of the second cell. At this time, the first battery 0 may be charged first, and then the second battery cell may be charged. That is, the charging sequence is first cell before the second cell after the first cell.

When the cycle number of the first battery cell is greater than that of the second battery cell, the aging degree of the first battery cell 130 may be considered to be greater than that of the second battery cell, so that the endurance time of the first battery cell after the charging is completed is shorter than that of the second battery cell 140 after the charging is completed. At this time, the second battery cell can be charged first, and then the first battery cell is charged. That is, the charging sequence is with the first cell at the back and the second cell at the front.

The charging sequence is determined according to the cycle times of the battery cores, different charging sequences can be set for the battery cores with different cycle times, time delay exists between the time of starting charging of the first battery core and the time of starting charging of the second battery core, the time of occurrence of the maximum charging power value of the first battery core charged by the external power source and the time of occurrence of the maximum charging power value of the second battery core charged by the external power source are staggered, and the temperature of the charging circuit is reduced.

In some embodiments, the sequentially distributing the first charging current to the first cell and the second charging current to the second cell according to a charging sequence includes:

detecting the voltage of a battery cell to which charging current is distributed first;

and when the detected voltage of the battery cell to which the charging current is distributed first reaches a preset voltage, distributing the charging current to the battery cell to be charged later.

In some embodiments, the method further comprises: when the external power supply is detected to be connected with the charging circuit, controlling a first battery cell and a second battery cell in the charging circuit to be connected in series;

and when the external power supply is not detected to be connected with the charging circuit, controlling the first battery cell and the second battery cell in the charging circuit to be connected in parallel.

For example, the first cell and the second cell in the charging circuit may be connected in series by controlling the second switch assembly to be in the third switch state. The first cell and the second cell in the charging circuit may be connected in parallel by controlling the second switch assembly to be in the fourth switch state.

When the external power supply charges the first electric core and the second electric core in the charging circuit, under the condition that the charging power provided by the external power supply is the same, compared with the case that the first electric core and the second electric core are connected in parallel, when the first electric core and the second electric core are connected in series, the current flowing through at least part of the transmission line for transmitting the current in the charging circuit is smaller, the heating loss of at least part of the transmission line can be reduced, the conversion rate of the electric energy provided by the external power supply to the electric energy stored in the first electric core and the second electric core can be improved, the heat generated by the transmission line can be reduced, and the charging safety accident caused by the higher temperature of the transmission line can be reduced.

When the first battery cell and the second battery cell are discharged, the whole body formed by the first battery cell and the second battery cell can be used as a power supply assembly, and the power supply assembly is used for supplying power to the electronic equipment.

When the first battery cell and the second battery cell are connected in series, the internal resistance of the power supply assembly is the sum of the internal resistance of the first battery cell and the internal resistance of the second battery cell. When first electric core and second electricity core are parallelly connected, this power supply unit's internal resistance is less than the internal resistance of first electric core and the internal resistance sum of second electricity core, consequently, compare in the first electric core and the second electricity core of establishing ties and discharge, the discharge current when parallelly connected first electric core and second electricity core discharge is great, is favorable to satisfying the user to great discharge current's demand.

In addition, the voltage difference between the parallel first battery cell and the parallel second battery cell and the electronic equipment for receiving and supplying power is small, so that the self power consumption and the heat productivity of the first battery cell and the second battery cell during discharging are reduced, and the discharging efficiency of a power supply assembly consisting of the first battery cell and the second battery cell is improved.

Through the charging circuit that this disclosed embodiment provided, steerable first electric core and second electric core are established ties and are parallelly connected switching between, have improved the flexibility ratio to first electric core and second electric core control, and then improve the charge efficiency to first electric core and second electric core to and utilize first electric core and second electric core to carry out the discharge efficiency who discharges.

In this embodiment of the disclosure, when the external power source is disconnected from the charging circuit, that is, when the external power source stops charging the charging circuit, the first battery cell and the second battery cell are switched from being connected in series to being connected in parallel, and at this time, the power supply assembly formed by the first battery cell and the second battery cell can supply power to the electronic device.

Compared with the series connection of the first battery cell and the second battery cell, the power supply assembly of the electric vehicle has the advantages that the first battery cell and the second battery cell which are connected in parallel are adopted to supply power to the electronic equipment as the power supply assembly, the discharging current of the power supply assembly formed by the first battery cell and the second battery cell is favorably improved, the requirement of a user for large discharging current is further met, the self power consumption and the heat productivity of the first battery cell and the second battery cell during discharging can be reduced, and the discharging efficiency of the power supply assembly formed by the first battery cell and the second battery cell is improved.

It should be noted that, when the first cell and the second cell are connected in parallel and are discharged simultaneously, the voltage across the first cell is the same as the voltage across the second cell.

Taking the example that the electronic device is a mobile phone, and the time for starting charging of the first electric core is earlier than the time for starting charging of the second electric core, when a user charges the mobile phone in the power-off state and switches the mobile phone from the power-off state to the power-on state in the charging process, because the current voltage of the first electric core is different from the current voltage of the second electric core in the power-on process, the first electric core and the second electric core are unbalanced, and the mobile phone can be supplied with power through the first electric core which starts charging first.

When the first battery cell completes charging and the second battery cell is still in a charging state, the second battery cell can be used for supplying power to the mobile phone.

When the first battery cell and the second battery cell are both charged, the voltage of the first battery cell is the same as the voltage of the second battery cell. At this moment, the first battery cell and the second battery cell reach a balanced state, and the first battery cell and the second battery cell can supply power to the mobile phone at the same time.

In some embodiments, the method further comprises: when it is not detected that the external power supply is connected with the charging circuit and the cycle number of the first battery cell is less than or equal to that of the second battery cell, controlling the first battery cell to discharge to the electronic equipment;

and when it is not detected that the external power supply is connected with the charging circuit and the cycle number of the first battery cell is greater than that of the second battery cell, controlling the second battery cell to discharge to the electronic equipment.

When the cycle number of the first battery cell is less than that of the second battery cell, the aging degree of the first battery cell can be considered to be less than that of the second battery cell, at the moment, the endurance time of the first battery cell is longer than that of the second battery cell, the discharge is carried out on the electronic equipment through the first battery cell, the reduction of the number of times for reminding a user to charge is facilitated, and the user experience is guaranteed.

Fig. 6 is a block diagram illustrating an apparatus 800 for charge control according to an example embodiment. For example, the apparatus 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and so forth.

Referring to fig. 6, the apparatus 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communications component 816.

The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can also include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile storage devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power component 806 provides power to the various components of device 800. The power assembly 806 may include: a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 800.

The multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and/or rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed status of the device 800, the relative positioning of components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in the position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration/deceleration of the device 800, and a change in the temperature of the device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The apparatus 800 may access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, communications component 816 further includes a Near Field Communications (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, or other technologies.

In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the device 800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

A non-transitory computer readable storage medium, wherein instructions, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the steps of the electronic device control method as provided by an embodiment of the present disclosure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A charging circuit, comprising:

the first battery cell is electrically connected with the charging control assembly through the first switch assembly;

the second battery cell is electrically connected with the charging control assembly through the first switch assembly; when the first switch assembly is in the first switch state, the first battery cell and the second battery cell are synchronously charged through the same current conversion unit;

2. The circuit of claim 1, further comprising:

a second switch assembly connected with the first switch assembly, the second switch assembly having a third switch state and a fourth switch state;

the charging control assembly is connected with the second switch assembly through the first switch assembly and is used for controlling the second switch assembly to switch between the third switch state and the fourth switch state;

the first battery cell is connected with the first switch assembly through the second switch assembly;

the second battery cell is connected with the first switch assembly through the second switch assembly;

in the third switching state of the second switching assembly, the first cell and the second cell are in series;

when the second switch assembly is in the fourth switch state, the first cell and the second cell are connected in parallel.

3. A circuit according to claim 1 or 2, characterized in that the circuit comprises:

the charging interface is connected with an external power supply and the charging control assembly; the charging interface is used for transmitting the charging current provided by the external power supply to the charging control assembly;

the charging control assembly includes:

a first current converting unit for converting at least part of the charging current into a first charging current;

a second current converting unit for converting at least part of the charging current into a second charging current having a current value different from the first charging current;

a distribution unit, connected to the first current conversion unit and the second current conversion unit, respectively, and configured to distribute the first charging current and the second charging current to the first battery cell and the second battery cell according to at least the first switch state or the second switch state in which the first switch assembly is currently located.

4. The circuit of claim 3,

the distribution unit is specifically configured to transmit the first charging current and the second charging current to the first battery cell and transmit the first charging current and the second charging current to the second battery cell when the first switch assembly is in the first switch state and the first battery cell and the second battery cell are connected in series;

the distribution unit is further specifically configured to distribute, when the first switch assembly is in the first switch state and the first battery cell and the second battery cell are connected in parallel, one half of a sum of the first charging current and the second charging current to the first battery cell, and one half of the sum of the first charging current and the second charging current to the second battery cell.

5. The circuit of claim 3,

the distribution unit is further configured to obtain the cycle number of the first battery cell and the cycle number of the second battery cell;

the distribution unit is specifically configured to distribute the first charging current and the second charging current to the first battery cell and distribute the second charging current to the second battery cell when the first switch assembly is in the second switch state, the first battery cell and the second battery cell are connected in series, and the cycle number of the first battery cell is less than or equal to the cycle number of the second battery cell;

the distribution unit is specifically configured to distribute the second charging current to the first battery cell and distribute the first charging current and the second charging current to the second battery cell when the first switch assembly is in the second switch state, the first battery cell and the second battery cell are connected in series, and the cycle number of the first battery cell is greater than the cycle number of the second battery cell.

6. The circuit of claim 3, wherein the distribution unit is further configured to distribute the first charging current to the first battery cell and distribute the second charging current to the second battery cell when the first switch assembly is in the second switch state and the first battery cell and the second battery cell are connected in parallel.

7. The circuit of claim 6,

the distribution unit is specifically configured to determine, when the first switch assembly is in the second switch state, a charging sequence for distributing the first charging current to the first battery cell and distributing the second charging current to the second battery cell according to the cycle number of the first battery cell and the cycle number of the second battery cell; and distributing the first charging current to the first battery cell and distributing the second charging current to the second battery cell in sequence according to the charging sequence.

8. The circuit of claim 7,

the distribution unit is specifically configured to determine the charging sequence according to the cycle count of the first battery cell and the cycle count of the second battery cell in the second switching state of the first switching assembly, where the cycle count is inversely related to the charging sequence.

9. The circuit of claim 8,

the distribution unit is configured to detect a voltage of a cell to which a charging current is first distributed, when distributing the first charging current to the first cell and distributing the second charging current to the second cell according to the charging order; and distributing charging current to the cells charged later when the detected voltage reaches a preset voltage.

10. The circuit of claim 3, wherein the first switching component comprises: a first end, a second end and a third end;

the first end is electrically connected with the first current conversion unit;

the second end is electrically connected with the second current conversion unit, and the second end is electrically connected with the distribution unit;

the third end is electrically connected with the distribution unit;

wherein the first terminal and the second terminal are connected when the first switch assembly is in the first switch state;

the first terminal and the third terminal are connected when the first switching component is in the second switching state.

11. The circuit of claim 10, wherein when the circuit includes a second switching component, the second switching component electrically connected to the distribution unit includes: a first switch unit, a second switch unit, a third switch unit, a fourth switch unit and a fifth switch unit;

the first switching unit includes: the first control end, the first output end, the second control end and the second output end; the first control end is connected with the third end of the first switch assembly, the first output end is connected with the anode of a first battery cell, the second control end is connected with the second current conversion unit, and the second output end is connected with the anode of a second battery cell;

the control end of the second switch unit is electrically connected with the positive electrode of the first battery cell, and the output end of the second switch unit is electrically connected with the negative electrode of the second battery cell;

a control end of the third switching unit is electrically connected with the negative electrode of the first battery cell, and an output end of the third switching unit is electrically connected with the positive electrode of the second battery cell;

the control end of the fourth switching unit is connected with the negative electrode of the first battery cell, and the output end of the fourth switching unit is grounded;

and the control end of the fifth switch unit is connected with the negative electrode of the second battery cell, and the output end of the fifth switch unit is grounded.

12. The circuit of claim 11,

when the first battery cell and the second battery cell are connected in series, the first control end is connected with the first output end, the second control end is connected with the second output end, the second switch unit is closed, the third switch unit is opened, the fourth switch unit is closed, and the fifth switch unit is opened;

alternatively, the first and second electrodes may be,

when the first battery cell and the second battery cell are connected in series, the first control end is connected with the second output end, the second control end is connected with the first output end, the second switch unit is disconnected, the third switch unit is closed, the fourth switch unit is disconnected, and the fifth switch unit is closed.

13. The circuit of claim 11, wherein when the first cell and the second cell are connected in parallel, the second switching unit is open, the third switching unit is open, the fourth switching unit is closed, and the fifth switching unit is closed.

14. The circuit of claim 13,

in the synchronous charging mode, the second control terminal is connected with the first output terminal, and the second control terminal is connected with the second output terminal;

in the asynchronous charging mode, the first control terminal is connected with the first output terminal, and the second control terminal is connected with the second output terminal;

alternatively, the first and second electrodes may be,

in the asynchronous charging mode, the first control terminal is connected to the second output terminal, and the second control terminal is connected to the first output terminal.

15. An electronic device control method characterized in that the electronic device includes the charging circuit according to any one of claims 1 to 14, the method comprising:

determining a current charging mode;

16. The method of claim 15, further comprising:

and controlling a first charging current obtained by conversion of a first current conversion unit in the charging circuit and a second charging current obtained by conversion of a second current conversion unit to be distributed to the first battery cell and the second battery cell according to the current charging mode, the cycle number of the first battery cell and the cycle number of the second battery cell.

17. The method of claim 16, wherein the controlling, according to the current charging mode and the cycle count of the first cell and the cycle count of the second cell, the distribution of a first charging current converted by a first current conversion unit and a second charging current converted by a second current conversion unit in the charging circuit to the first cell and the second cell comprises:

when the current charging mode is the synchronous charging mode, the first battery cell and the second battery cell are connected in series, and the cycle number of the first battery cell is less than or equal to that of the second battery cell, allocating the first charging current and the second charging current to the first battery cell, and allocating the second charging current to the second battery cell;

alternatively, the first and second electrodes may be,

when the current charging mode is the synchronous charging mode, the first battery cell and the second battery cell are connected in series, and the cycle number of the first battery cell is greater than that of the second battery cell, the second charging current is distributed to the first battery cell, and the first charging current and the second charging current are distributed to the second battery cell.

18. The method of claim 16, wherein the controlling, according to the current charging mode and the cycle count of the first cell and the cycle count of the second cell, the distribution of a first charging current converted by a first current conversion unit and a second charging current converted by a second current conversion unit in the charging circuit to the first cell and the second cell comprises:

when the current charging mode is the asynchronous charging mode, determining a charging sequence for distributing the first charging current to the first battery cell and distributing the second charging current to the second battery cell according to the cycle number of the first battery cell and the cycle number of the second battery cell;

and according to the charging sequence, sequentially distributing the first charging current to the first battery cell and distributing the second charging current to the second battery cell.

19. The method of claim 18,

the cycle number is inversely related to the charging sequence.

20. The method of claim 19, wherein sequentially allocating the first charging current to the first cell and the second charging current to the second cell according to the charging sequence comprises:

21. The method of claim 15,

when it is detected that an external power supply is connected with the charging circuit, controlling the first battery cell and the second battery cell in the charging circuit to be connected in series;

when it is not detected that an external power supply is connected with the charging circuit, controlling the first battery cell and the second battery cell in the charging circuit to be connected in parallel.

22. The method of claim 21, further comprising:

when it is not detected that an external power supply is connected with the charging circuit and the cycle number of the first battery cell is smaller than or equal to that of the second battery cell, controlling the first battery cell to discharge to the electronic equipment;

and when it is not detected that an external power supply is connected with the charging circuit and the cycle number of the first battery cell is greater than that of the second battery cell, controlling the second battery cell to discharge to the electronic equipment.

23. A charge control device, characterized by comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to: the executable instructions, when executed, implement the steps in the method of any one of claims 15 to 22.

24. A non-transitory computer readable storage medium having instructions which, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the steps of the method of any one of claims 15 to 22.