WO2024093587A1

WO2024093587A1 - Charging circuit, charging method, charging system, storage medium and chip system

Info

Publication number: WO2024093587A1
Application number: PCT/CN2023/121685
Authority: WO
Inventors: 吴彪; 陈泽曦
Original assignee: 华为技术有限公司
Priority date: 2022-10-31
Filing date: 2023-09-26
Publication date: 2024-05-10
Also published as: CN117996882A

Abstract

The present application is applicable to the technical field of terminals. Provided are a charging circuit, a charging method, a charging system, a storage medium and a chip system. The charging circuit comprises: a control module, a charging module, a first fast-charging module, a second fast-charging module, a first detection module, a second detection module and a first switch device, wherein the first fast-charging module and the first detection module are both connected to a first battery in a battery pack, and the first detection module is further connected to the control module; the second fast-charging module and the second detection module are both connected to a second battery in the battery pack, and the second detection module is further connected to the control module; and the first switch device is connected in series between the charging module and the first battery, and each battery can be charged by means of the fast-charging modules by adjusting the state of the first switch device, such that the battery can be charged by using a larger current, the time spent charging a terminal device is shortened, and thus the charging efficiency of the terminal device can be improved.

Description

Charging circuit, charging method, charging system, storage medium and chip system

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on October 31, 2022, with application number 202211351542.4 and application name “Charging circuit, charging method, charging system, storage medium and chip system”, the entire contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the technical field of terminal equipment, and in particular to a charging circuit, a charging method, a charging system, a storage medium and a chip system.

Background technique

As terminal devices continue to develop, the battery capacity of terminal devices is also increasing to improve the endurance of terminal devices. For example, the terminal device can be provided with multiple batteries or multiple cells connected in parallel to increase the battery capacity.

Since multiple batteries or multiple cells are connected in parallel, the terminal device needs to be charged in a derating manner. That is, the terminal device can adjust the charging current of each battery or each cell according to the maximum charging current of the battery or cell, so that the current input to each battery or each cell is less than the maximum charging current of the battery or cell (such as charging at 80% of the maximum charging current), thereby preventing the battery from swelling due to fast charging and causing safety hazards.

However, it takes more time for the terminal device to charge by reducing the charging current, resulting in low charging efficiency.

Summary of the invention

The present application provides a charging circuit, a charging method, a charging system, a storage medium and a chip system, which solve the problem in the prior art that the terminal device is charged by reducing the charging current, resulting in low charging efficiency.

In order to achieve the above objectives, this application adopts the following technical solutions:

In a first aspect, a charging circuit is provided, the charging circuit comprising: a control module, a charging module, a first fast charging module, a second fast charging module, a first detection module, a second detection module and a first switch device;

The first fast charging module and the first detection module are both connected to the first battery in the battery pack, and the first detection module is also connected to the control module;

The second fast charging module and the second detection module are both connected to the second battery in the battery pack, and the second detection module is also connected to the control module;

The first switch device is connected between the charging module and the first battery, and the charging module is connected to the second battery;

The control module is also respectively connected to the charging module, the first fast charging module, the second fast charging module and the first switching device, and is used to control the on or off of the charging module, the first fast charging module, the second fast charging module and the first switching device according to the voltage across the first battery detected by the first detection module and the voltage across the second battery detected by the second detection module.

The charging circuit provided in the embodiment of the present application, without affecting the safety of the battery, sets multiple fast charging modules and switching devices corresponding to each fast charging module in the charging circuit, and by adjusting the state of each switching device during the fast charging stage of charging the terminal device, each battery can be fast charged separately through the fast charging module, so that a larger current can be used to charge the battery during the fast charging stage, thereby reducing the time spent on charging the terminal device and improving the charging efficiency of the terminal device.

In a first possible implementation manner of the first aspect, the charging circuit further includes: a second switching device;

The second switch device is connected between the charging module and the second battery.

By setting the second switching device, the state of the first switching device or the second switching device can be adjusted, thereby improving the flexibility and reliability of charging of the terminal device.

Based on the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the first switching device is integrated in the charging module.

Based on the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the first switching device and the second switching device are both integrated in the charging module.

By integrating various switch devices in the charging module, there is no need to additionally provide switch devices in the charging circuit, thereby reducing the area of the charging circuit and improving the flexibility of the charging circuit.

Based on the second or third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the first detection module and the second detection module are both integrated in the charging module;

The first detection module is used to send the detected voltage across the first battery to the control module;

The second detection module is used to send the detected voltage across the second battery to the control module.

By integrating the first detection module and the second detection module in the charging module, there is no need to additionally provide a detection module in the charging circuit, thereby reducing the area of the charging circuit and improving the flexibility of the charging circuit.

Based on any other possible implementation manner of the first aspect except the fourth, in a fifth possible implementation manner of the first aspect, the first detection module is integrated in the first fast charging module, and the second detection module is integrated in the second fast charging module.

By integrating the first detection module in the first fast charging module and integrating the second detection module in the second fast charging module, there is no need to additionally set up a detection module in the charging circuit, thereby reducing the area of the charging circuit and improving the flexibility of the charging circuit.

Based on any possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the charging circuit further includes: a third fast charging module, a third detection module, and a third switching device;

The third fast charging module and the third detection module are both connected to the third battery in the battery pack, and the third detection module is also connected to the control module;

The third switch device is connected between the charging module and the third battery.

By providing a third fast charging module, a third detection module and a third switching device, the charging circuit can continue to be connected to the third battery on the basis of being connected to the first battery and the second battery, thereby improving the flexibility and expansibility of the charging circuit.

In a second aspect, a charging method is provided, which is applied to a charging circuit, wherein the charging circuit includes: a charging module, a first fast charging module, a second fast charging module, and a first switching device, wherein the charging module is used to charge a first battery and a second battery in a battery pack, wherein the first switching device is connected in series between the charging module and the first battery, the first fast charging module is connected to the first battery, and the second fast charging module is connected to the second battery;

The charging method comprises:

Acquire a first voltage across the first battery and a second voltage across the second battery;

According to the first voltage and the second voltage, the state of the first switching device is adjusted so that the circuit structure of the charging circuit changes, and the first battery is charged through the first fast charging module and the second battery is charged through the second fast charging module.

In a first possible implementation manner of the second aspect, adjusting the state of the first switching device according to the first voltage and the second voltage includes:

Comparing the first voltage and the second voltage with a preset first voltage threshold respectively;

If the first voltage and the second voltage are both greater than the first voltage threshold, adjusting the state of the first switch device;

If at least one of the first voltage and the second voltage is less than or equal to the first voltage threshold, the state of the first switching device is maintained unchanged.

In a second possible implementation manner of the second aspect, after charging the first battery through the first fast charging module and charging the second battery through the second fast charging module, the method further includes:

Acquire the first voltage across the first battery and the second voltage across the second battery to obtain a voltage difference between the first voltage and the second voltage;

According to the magnitude relationship between the voltage difference and a preset second voltage threshold, the current output by the first fast charging module and/or the second fast charging module is adjusted.

Based on the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, adjusting the current output by the first fast charging module and/or the second fast charging module according to the magnitude relationship between the voltage difference and a preset second voltage threshold includes:

If the voltage difference is less than or equal to the second voltage threshold, the current output by the first fast charging module and/or the second fast charging module remains unchanged;

If the voltage difference is greater than the second voltage threshold and the first voltage is greater than the second voltage, reducing the current output by the first fast charging module and/or increasing the current output by the second fast charging module;

If the voltage difference is greater than the second voltage threshold and the first voltage is less than the second voltage, increasing the current output by the first fast charging module and/or reducing the current output by the second fast charging module;

The magnitude relationship between the first voltage and the second voltage is determined when calculating the voltage difference.

In a fourth possible implementation manner of the second aspect, after charging the first battery through the first fast charging module and charging the second battery through the second fast charging module, the method further includes:

Obtain the first voltage across the first battery and the second voltage across the second battery, and convert the first voltage and the The second voltage is compared with a preset third voltage threshold value respectively;

If the first voltage and the second voltage are both greater than or equal to a preset third voltage threshold, the first battery is charged by the first fast charging module using a constant voltage charging method, and the second battery is charged by the second fast charging module using a constant voltage charging method.

Based on the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, after the first battery is charged by the first fast charging module in a constant voltage charging manner, and the second battery is charged by the second fast charging module in a constant voltage charging manner, the method further includes:

Acquire a first charging current corresponding to the first battery and a second charging current corresponding to the second battery;

According to the first charging current and the second charging current, combined with a preset current threshold, the state of the first switching device is adjusted again, and the first battery and the second battery are charged simultaneously through the charging module until charging is completed.

Based on the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, adjusting the state of the first switching device again according to the first charging current and the second charging current in combination with a preset current threshold includes:

Calculate the total charging current according to the first charging current and the second charging current;

Comparing the total charging current with the current threshold;

If the total charging current is greater than the current threshold, the first battery and the second battery are charged respectively by the first fast charging module and the second fast charging module in a constant voltage charging manner;

If the total charging current is less than or equal to the current threshold, the state of the first switching device is adjusted again.

In a third aspect, a charging system is provided, the charging system comprising: a terminal device and an adapter, the terminal device comprising the charging circuit as described in any one of the first aspects;

The adapter is connected to the charging circuit of the terminal device through the charging port of the terminal device;

The terminal device or the charging circuit adopts the charging method described in any one of the second aspects to charge the battery pack of the terminal device.

In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the charging method as described in any one of the second aspects is implemented.

In a fifth aspect, a chip system is provided, comprising a memory and a processor, wherein the processor executes a computer program stored in the memory to implement a charging method as described in any one of the second aspects.

It can be understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1A is a schematic diagram of the structure of a charging circuit;

FIG1B is a schematic diagram of the structure of another charging circuit;

FIG2 is a schematic diagram of a charging scenario based on a charging circuit according to an embodiment of the present application;

FIG3 is a circuit topology diagram of a charging circuit provided in an embodiment of the present application;

FIG4 is a circuit topology diagram of another charging circuit provided in an embodiment of the present application;

FIG5 is a circuit topology diagram of another charging circuit provided in an embodiment of the present application;

FIG6 is a circuit topology diagram of another charging circuit provided in an embodiment of the present application;

FIG7 is a circuit topology diagram of another charging circuit provided in an embodiment of the present application;

FIG8 is a circuit topology diagram of another charging circuit provided in an embodiment of the present application;

FIG9 is a circuit topology diagram of another charging circuit provided in an embodiment of the present application;

FIG10 is a schematic flow chart of a charging method provided in an embodiment of the present application;

FIG. 11 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application.

Detailed ways

In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known charging methods, voltage and current adjustment methods, switch state switching methods, and terminal devices are omitted to avoid unnecessary details that hinder the description of the present application.

The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "said", "above", and "the" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context.

With the continuous development of terminal devices, in order to improve the endurance of terminal devices, the battery capacity of terminal devices can be increased by setting multiple batteries or multiple cells. Accordingly, on the basis of increasing the battery capacity, the terminal device can also use a fast charging method to charge multiple batteries or multiple cells to reduce the time spent on charging the terminal device.

During fast charging, multiple batteries or multiple cells can be connected in series or in parallel, and the terminal device can also use different methods to charge multiple batteries or multiple cells using different connection methods.

Referring to FIG. 1A , FIG. 1A is a schematic diagram of the structure of a charging circuit. As shown in FIG. 1A , the charging circuit comprises: a charging module, a battery 1 and a battery 2, wherein the charging module, the battery 1 and the battery 2 are connected in series in sequence.

Accordingly, in the process of charging through the charging circuit shown in FIG1A , the terminal device can input the maximum charging current to battery 1 and battery 2 to charge battery 1 and battery 2, thereby reducing the time spent on charging. The maximum charging current is the maximum charging current of battery 1 and battery 2.

Moreover, when battery 1 and battery 2 are connected in series, since the voltages output by battery 1 and battery 2 are relatively high, a step-down module is required to step down the voltages output by battery 1 and battery 2, and then the stepped-down voltage is used to power various modules in the terminal device system, thereby achieving normal operation of the terminal device.

However, the step-down module will cause a certain amount of energy loss during the step-down process, thus affecting the endurance of the terminal device. Moreover, based on the higher voltage output by the battery, it is necessary to improve the voltage resistance of each component in the terminal device, resulting in an increase in the cost of the terminal device.

Based on this, refer to Figure 1B, which is a structural diagram of another charging circuit. As shown in Figure 1B, the charging circuit includes: a charging module, a battery 1 and a battery 2, wherein the battery 1 and the battery 2 are connected in parallel, and the charging module is connected in series with the parallel-connected battery 1 and the battery 2.

Since the charging link impedance between the parallel-connected battery 1 and battery 2 cannot be completely consistent, the currents input to battery 1 and battery 2 may be inconsistent. For example, the current input to battery 1 is greater than the maximum charging current of battery 1, while the current input to battery 2 is less than the maximum charging current of battery 2. Accordingly, after multiple fast charging of battery 1 and battery 2, if a battery is charged with a charging current greater than the maximum charging current for a long time, it may cause the battery to swell and cause safety problems. Therefore, it is necessary to use a derating charging method for charging.

Specifically, during the charging process, the terminal device can first determine the maximum charging current of battery 1 and battery 2, and then adjust the current output by the charging module according to the maximum charging current, thereby simultaneously performing derating charging on battery 1 and battery 2.

For example, the maximum charging current of battery 1 and battery 2 is both 2 amperes (A), and the battery is charged at 80% of the maximum charging current, so the current input to each battery is 1.6A.

Although derating can reduce the probability of safety issues caused by battery expansion, it will increase the time spent charging the terminal device, thereby reducing the charging efficiency of the terminal device.

It should be noted that, for the sake of simplicity, the above only takes two batteries as an example to illustrate the circuit structure of charging two batteries connected in series or in parallel. In actual applications, other numbers of batteries can be set in series or in parallel in the terminal device. For example, three batteries, five batteries or more batteries can be set in the terminal device. The embodiment of the present application does not specifically limit the number of batteries in the terminal device.

Therefore, the embodiments of the present application propose a charging circuit and a charging method. On the basis of not affecting the safety of the battery, multiple fast charging modules and switching devices corresponding to each fast charging module are arranged in the charging circuit. By adjusting the state of each switching device during the fast charging stage of charging the terminal device, each battery can be fast charged separately through the corresponding fast charging module, so that a larger current can be used to charge the battery during the fast charging stage, thereby reducing the time spent on charging the terminal device and improving the charging efficiency of the terminal device.

The following is an introduction to a charging scenario involved in a charging circuit and a charging method provided in an embodiment of the present application. Referring to FIG. 2 , FIG. 2 is a schematic diagram of a charging scenario involved in a charging circuit provided in an embodiment of the present application, the charging scenario including: a terminal device 210 and an adapter 220, the terminal device 210 can be connected to the adapter 220 through a pre-set charging port.

The terminal device 210 may include: a charging circuit 2101 and a battery pack 2102 , and a plurality of batteries in the battery pack 2102 are all connected to the charging circuit 2101 .

Specifically, after the terminal device 210 is connected to the adapter 220, the adapter 220 can communicate with the terminal device 210 through a preset charging protocol. The terminal device 210 exchanges data with the adapter 220 to determine the charging method supported by the terminal device 210. If the terminal device 210 exchanges data with the adapter 220 using the charging protocol corresponding to fast charging, it means that the terminal device 210 supports fast charging, and the adapter 220 can charge the terminal device 210 using the fast charging method. If the terminal device 210 exchanges data with the adapter 220 using the charging protocol corresponding to conventional charging, it means that the terminal device 210 does not support fast charging, and the adapter 220 can charge the terminal device 210 using the conventional charging method.

Among them, both conventional charging and fast charging can be charging methods for terminal devices. The current input to the battery during conventional charging is less than the current input to the battery during fast charging. For example, during conventional charging, the charging current input to the terminal device by the adapter is 1A; while during fast charging, the charging current input to the terminal device by the adapter is 2.4A. The embodiment of the present application does not limit the current output by the adapter during conventional charging and fast charging.

The following is an example of a terminal device supporting fast charging. When the terminal device is charged in a fast charging manner, the terminal device can be charged through multiple charging stages such as a trickle charging stage, a fast charging stage, and a constant voltage charging stage.

Among them, the trickle charging stage is a stage in which a small current is used for charging to prevent damage to the battery; the fast charging stage (hereinafter referred to as the fast charging stage) is a stage in which a large current is used for charging to reduce the charging time; the constant voltage charging stage is a stage in which the output voltage remains unchanged after the battery has a certain amount of power, and the output current decreases as the battery power increases.

Of course, during the fast charging process, the terminal device may also be charged in a manner including other charging stages, and the various charging stages included in the fast charging in the embodiment of the present application are not specifically limited.

Accordingly, during the charging process, if the current power level of the terminal device 210 is low, the adapter 220 can first use trickle charging to charge the terminal device 210 with a small current through the charging module in the charging circuit 2101. When the battery power of the terminal device 210 reaches a certain level, the adapter 220 can enter the fast charging stage for charging, that is, high current charging.

Accordingly, when the terminal device 210 enters the fast charging stage, it can first adjust the various switching devices in the charging circuit 2101 so that each battery in the battery pack 2102 is separately connected to the corresponding fast charging modules in the charging circuit 2101, so that each battery can be charged with a large current individually through each fast charging module, thereby reducing the time spent on charging the terminal device.

Among them, the switching device can be a device, circuit or a combination of a device and a circuit with a turn-on or turn-off function. For example, the switching device can be a triode, a metal-oxide-semiconductor field-effect transistor (MOSFET) (hereinafter referred to as MOS tube) or a relay. The embodiments of the present application do not specifically limit the switching device.

After a period of fast charging, the battery power of the terminal device is further improved, so that it can enter the constant voltage charging stage for charging. Correspondingly, the adapter 220 can continue to keep the output voltage unchanged through each fast charging module and charge by constant voltage charging. When the charging current input to each battery gradually decreases, each switching device can be adjusted again to stop charging through the fast charging module, and instead charge each battery through the charging module in the charging circuit 2101. When the current input to the battery is less than a certain threshold, it can be considered that the terminal device is fully charged.

It should be noted that during the above-mentioned charging process, when the terminal device 210 is charged through the fast charging module of the charging circuit 2101, the states of the various switching devices in the charging circuit 2101 can be adjusted so that each battery of the battery pack 2102 can be charged individually through the corresponding fast charging module, thereby being able to charge according to the maximum charging current of the battery, thereby reducing the time required for charging the terminal device.

Moreover, in actual applications, the charging circuit may include multiple fast charging modules, each fast charging module corresponds one-to-one to each battery in the battery pack 2102, and each switching device in the charging circuit may also correspond one-to-one to each fast charging module. The embodiment of the present application does not specifically limit the number of fast charging modules, the number of switching devices, and the number of each battery in the battery pack 2102.

The following further describes the charging circuit 2101 of the terminal device by taking a battery pack including two batteries (a first battery and a second battery) as an example.

Refer to Figure 3, which is a circuit topology diagram of a charging circuit provided in an embodiment of the present application. As shown in Figure 3, the charging circuit may include: a control module 301, a first fast charging module 302, a second fast charging module 303, a first switching device 304, a second switching device 305, a first detection module 306, a second detection module 307 and a charging module 308.

As shown by the dotted lines in FIG3 , the control module 301 is respectively connected to the first detection module 306 and the second detection module 307. As shown by the dotted lines in FIG3 , the control module 301 is used to adjust the charging mode of the terminal device according to the information collected by the first detection module 306 and the second detection module 307.

For example, the first detection module 306 may be connected to the first battery, and the second detection module 307 may be connected to the second battery. The first detection module 306 can send a first voltage across the first battery to the control module 301, and the second detection module 307 can send a second voltage across the second battery to the control module 301. Accordingly, the control module 301 can output and control the first fast charging module 302, the second fast charging module 303, the first switch device 304, the second switch device 305 and the charging module 308 according to the first voltage and the second voltage.

Moreover, as shown by the solid line in Figure 3, both the first fast charging module 302 and the second fast charging module 303 can be connected to the charging port of the terminal device, thereby connecting to the adapter. The first fast charging module 302 can also be connected to the first battery, and the second fast charging module 303 can also be connected to the second battery.

In addition, as shown by the solid line in FIG3 , the charging module 308 can also be connected to the charging port of the terminal device, thereby connecting to the adapter. The charging module 308 can also be connected to the first switch device 304 and the second switch device 305 respectively, and the first switch device 304 can also be connected to the first fast charging module 302, and the second switch device 305 can also be connected to the second fast charging module 303.

In addition, the charging module 308 can also be connected to other components of the terminal device (such as a processor) so that the charging module 308 can power various components of the terminal device based on the power provided by the battery pack to maintain the normal operation of the terminal device.

It should be noted that when the above-mentioned first fast charging module 302, the second fast charging module 303 and the charging module 308 are connected to the charging port of the terminal device, they can be directly connected to the charging port or connected to the charging port through the protection module of the terminal device. The embodiment of the present application does not specifically limit the connection method between the first fast charging module 302, the second fast charging module 303 and the charging module 308 and the charging port.

It should also be noted that, in actual applications, the control module 301 may be a micro control unit (MCU) or other components with data processing functions. The embodiment of the present application does not specifically limit the control module 301.

Moreover, the above-mentioned first fast charging module 302 and the second fast charging module 303 can be charge pump circuit modules or switching power supply circuit modules. The embodiment of the present application does not specifically limit the first fast charging module 302 and the second fast charging module 303.

For example, components with switching functions (such as MOS) can be set in the first fast charging module 302 and the second fast charging module 303. When the components are turned on, the first fast charging module 302 and the second fast charging module 303 can charge the battery of the terminal device. When the components are turned off, the first fast charging module 302 and the second fast charging module 303 stop charging the battery of the terminal device.

In addition, the above-mentioned first detection module 306 and second detection module 307 can be different components, or they can be the same components, or they can be the same component, that is, the first detection module 306 and the second detection module 307 can be integrated in the component to complete the detection of the voltage at both ends of the battery. The embodiment of the present application does not specifically limit the first detection module 306 and the second detection module 307.

Based on the various charging stages that the terminal device goes through during fast charging, the following circuit topology diagram based on the charging circuit shown in Figure 3 further introduces the above-mentioned various charging stages.

Trickle charge stage:

After the terminal device is connected to the adapter, the adapter determines based on the charging protocol that the terminal device supports fast charging. If the battery power of the terminal device is low, the control module 301 of the charging circuit can instruct the adapter to use trickle charging first, and charge the first battery and the second battery simultaneously through the charging module 308.

Moreover, during the charging process, the control module 301 of the charging circuit can also determine the power of the first battery and the power of the second battery respectively through the first detection module 306 and the second detection module 307. Of course, the terminal device can also determine the power of the first battery and the second battery respectively through the first voltage at both ends of the first battery and the second voltage at both ends of the second battery. The embodiment of the present application does not limit the method of determining the power corresponding to the first battery and the second battery respectively.

Specifically, the first detection module 306 and the second detection module 307 can respectively continuously detect the power levels of the first battery and the second battery, that is, detect the first voltage across the first battery and the second voltage across the second battery, and send the detection results to the control module 301.

The control module 301 can compare the received detection result with a preset first voltage threshold. If both the first voltage and the second voltage are greater than the first voltage threshold, it means that both the first battery and the second battery can start fast charging.

The first voltage threshold is a preset voltage parameter used to determine whether the battery can be charged using a high current charging method.

Correspondingly, if the control module 301 determines that both the first battery and the second battery can start charging using the fast charging method, the control module 301 can adjust the state of the first switch device 304 or the second switch device 305, so that the first switch device 304 or the second switch device 305 switches from a closed state to an open state, thereby changing the circuit structure of the charging circuit.

Fast charging stage:

Corresponding to the trickle charging stage, after the circuit structure of the charging circuit changes, the first battery is connected to the first fast charging module 302 alone, and the second battery is connected to the second fast charging module 303 alone, so that the first battery and the second battery can be charged separately, without limiting the current input to the first battery and the second battery, and the maximum charging current of the first battery and the second battery can be used. Charging can be carried out to improve the charging efficiency of the terminal equipment.

Specifically, referring to Figure 4, the control module 301 can send instructions to the first switch device 304 or the second switch device 305 to control the first switch device 304 or the second switch device 305 (indicated by disconnecting the first switch device 304 in Figure 4) to switch from a closed state to an open state. When the first switch device 304 and the second switch device 305 are both in the closed state, the first battery and the second battery are respectively connected to the corresponding fast charging modules separately, so that the first battery can be charged separately through the first fast charging module 302, and the second battery can also be charged separately through the second fast charging module 303.

Furthermore, in the fast charging stage, the first detection module 306 and the second detection module 307 may continue to detect the first voltage of the first battery and the second voltage of the second battery respectively, and send the detection results to the control module 301. The control module 301 may compare the first voltage and the second voltage to obtain the voltage difference between the two.

If the voltage difference between the first voltage and the second voltage is greater than a preset second voltage threshold, indicating that the voltage difference between the first voltage and the second voltage is large, the control module 301 may adjust the first fast charging module 302 and/or the second fast charging module 303 (such as adjusting the duty cycle of the first fast charging module 302 and/or the second fast charging module 303) in order to maintain voltage balance, so that the current output by the first fast charging module 302 and/or the second fast charging module 303 changes, thereby gradually reducing the voltage difference between the first voltage at both ends of the first battery and the second voltage at both ends of the second battery.

The second voltage threshold is a preset voltage parameter used to determine whether the voltage difference between the first battery and the second battery needs to be adjusted.

If the difference between the first voltage and the second voltage is less than or equal to the preset second voltage threshold, it means that the voltage difference between the first voltage and the second voltage is small, and there is no need to adjust the first fast charging module 302 and the second fast charging module 303. The first battery and the second battery can continue to be charged through the first fast charging module 302 and the second fast charging module 303 respectively until the voltage of at least one of the first battery and the second battery reaches the third voltage threshold.

The third voltage threshold is a preset voltage parameter used to determine whether the battery needs to be charged in a constant voltage mode.

Correspondingly, after the control module 301 determines that the voltage of at least one battery reaches the third voltage threshold based on the detection results sent by the first detection module 306 and the second detection module 307, the control module 301 can control the first fast charging module 302 and the second fast charging module 303 to adopt a constant voltage charging method to charge the first battery and the second battery respectively.

Furthermore, the control module 301 may continue to detect the first current input to the first battery and the second current input to the second battery through the first detection module 306 and the second detection module 307, and calculate the sum of the first current and the second current to obtain the total charging current.

Constant voltage charging stage:

As the battery power continues to increase, the first voltage and the second voltage continue to increase, and the first current and the second current also decrease accordingly. When the total charging current obtained according to the first current and the second current is less than or equal to the preset current threshold, the control module 301 can adjust the first switch device 304 or the second switch device 305 again, and the control module 301 can also control the first fast charging module 302 and the second fast charging module 303 to stop working, and control the charging module 308 to charge the first battery and the second battery at the same time until the terminal device is fully charged.

The current threshold is a preset current parameter used to determine whether the constant voltage charging mode needs to be terminated, that is, to determine whether each battery of the battery pack can be charged by the charging module 308. Moreover, the current threshold can be determined according to the characteristics of the charging current of the first battery and the second battery during the charging process, and the embodiment of the present application does not specifically limit the parameters of the current threshold.

It should be noted that the above description uses two fast charging modules and two switching devices as an example. In actual applications, the components of the charging circuit can be reduced to reduce the cost of the charging circuit. For example, any one of the two switching devices can be retained and the other switching device can be removed, so that the circuit structure of the charging circuit can be adjusted through the retained switching device. As shown in Figure 5, Figure 5 takes the example of removing the first switching device 304 and retaining the second switching device 305.

In addition, the detection module and/or switch device provided in the embodiments of the present application can be integrated with other components in the charging circuit in a variety of ways to reduce the area occupied by the charging circuit and improve the flexibility of the charging circuit.

method one

Refer to Figure 6, which is a circuit topology diagram of another charging circuit provided in an embodiment of the present application. As shown in Figure 6, the first detection module 306 is integrated in the first fast charging module 302, and the second detection module 307 is integrated in the second fast charging module 303. There is no need to additionally set a detection module in the charging circuit, thereby reducing the area of the charging circuit and improving the flexibility of the charging circuit.

Method 2

Referring to FIG. 7 , FIG. 7 is a circuit topology diagram of another charging circuit provided in an embodiment of the present application. As shown in FIG. 7 , the first switch device 304 and the second switch device 305 are both integrated in the charging module 308, and there is no need to set additional switch devices in the charging circuit, thereby The area of the charging circuit can be reduced and the flexibility of the charging circuit can be improved.

Method 3

Referring to FIG8 , FIG8 is a circuit topology diagram of another charging circuit provided in an embodiment of the present application. As shown in FIG8 , the first switch device 304, the second switch device 305, the first detection module 306 and the second detection module 307 are all integrated in the charging module 308. Accordingly, the detection points for detecting the voltage of the first detection module 306 and the second detection module 307 can be built into the charging module 308, or can be sampled at the positive and negative electrodes of the first battery and the second battery through the external signal pin of the charging module 308. The embodiment of the present application does not specifically limit the detection points of the first detection module 306 and the second detection module 307.

Moreover, the first detection module 306 and the second detection module 307 can exchange data with the control module 301 through the communication interface of the charging module 308, without the need to additionally set up switching devices and detection modules in the charging circuit, thereby reducing the area of the charging circuit and improving the flexibility of the charging circuit.

It should be noted that three integration methods are shown above, and in actual applications, other integration methods can also be used to integrate the various components in the charging circuit. The embodiment of the present application does not specifically limit the integration method of the various components in the charging circuit.

Furthermore, the above description uses the example of connecting a charging circuit to two batteries to explain the connection relationship and working principle of the charging circuit. In actual applications, the battery pack of the terminal device may include multiple batteries. The following describes the case where the charging circuit is connected to multiple batteries.

Referring to Figure 9, Figure 9 is a circuit topology diagram of another charging circuit provided in an embodiment of the present application. As shown in Figure 9, the charging circuit may include N fast charging modules, each of which is connected to a corresponding battery in the terminal device. Moreover, the charging circuit may also include N detection modules, each of which is used to detect parameters such as current and voltage of the corresponding battery. Similarly, the charging circuit may also include N switching devices, each of which is used to control whether the corresponding battery is connected in parallel with other batteries. Wherein N is a positive integer.

To summarize, the charging circuit provided in the embodiment of the present application, without affecting the safety of the battery, sets multiple fast charging modules and switching devices corresponding to each fast charging module in the charging circuit, and by adjusting the state of each switching device during the fast charging stage of charging the terminal device, each battery can be fast charged separately through the fast charging module, so that a larger current can be used to charge the battery during the fast charging stage, thereby reducing the time spent on charging the terminal device and improving the charging efficiency of the terminal device.

FIG10 is a schematic flow chart of a charging method provided in an embodiment of the present application. As an example but not a limitation, the method can be applied to the charging circuit of the above-mentioned terminal device. Referring to FIG10 , the method includes:

Step 1001: Obtain a first voltage across two terminals of a first battery and a second voltage across two terminals of a second battery.

Among them, the first battery and the second battery can both be batteries included in the battery pack in the terminal device, as shown in Figure 3, Figure 6, Figure 7 or Figure 8, the first battery corresponds to the first fast charging module and the first detection module respectively, and the second battery corresponds to the second fast charging module and the second detection module respectively.

After the terminal device is connected to the adapter, the adapter can provide the terminal device with a voltage and current for charging. Correspondingly, the terminal device can adjust the voltage and current output by the adapter through a pre-set charging circuit so that the adjusted voltage and current meet the voltage and current required by the terminal device, thereby charging the terminal device.

During the charging process, the terminal device can detect the voltage across each battery through a pre-set detection module corresponding to each battery to obtain a detection result, so that the corresponding power of each battery can be determined according to the detection result, so that in the subsequent steps, the terminal device can charge each battery separately by fast charging according to the corresponding power of each battery.

Specifically, after the terminal device starts charging, the first detection module shown in FIG. 3, FIG. 6, FIG. 7 or FIG. 8 can start to detect the voltage across the first battery and transmit the detection result to the control module in the charging circuit. The control module can receive the detection result sent by the first detection module, and determine the first voltage across the first battery according to the detection result, thereby determining the current power of the first battery, so that in subsequent steps, the terminal device can determine whether the first battery can be quickly charged according to the power of the first battery.

Similarly, the second detection module can also detect the second voltage at both ends of the second battery in a manner similar to the first detection module mentioned above, and the charging circuit can also determine the second voltage at both ends of the second battery based on the detection result transmitted by the second detection module, thereby determining the power of the second battery.

It should be noted that the first detection module and the second detection module can detect the first voltage and the second voltage in real time. The first voltage and the second voltage may be collected, or the first voltage and the second voltage may be collected periodically. The embodiment of the present application does not specifically limit the manner of obtaining the first voltage and the second voltage.

Step 1002: According to the first voltage threshold, in combination with the first voltage and the second voltage, adjust the state of the first switch device or the second switch device.

The first voltage threshold is a preset parameter used to determine whether the battery can be charged by high current, that is, whether the battery can be charged by fast charging. When the voltage across any battery is greater than the first voltage threshold, it means that the battery can be charged by fast charging with high current.

Specifically, after the first battery and the second battery are detected and the detection results are obtained, the terminal device can determine the first voltage and the second voltage based on the detection results through the control module. Afterwards, the control module can compare the two detected voltages with the preset first voltage threshold to obtain a comparison result.

If the comparison result indicates that both the first voltage and the second voltage are greater than the first voltage threshold, it means that the first battery and the second battery do not need to continue to be charged with a small current, but can be charged with a large current to increase the charging speed of the terminal device.

Correspondingly, the terminal device can send instructions to the first switch device or the second switch device through the control module, so that the first switch device or the second switch device switches from a closed state to an open state, thereby adjusting the circuit structure of the charging circuit to obtain a charging circuit as shown in Figure 4 or 5, in which the first battery is separately connected to the first fast charging module, and the second battery is separately connected to the second fast charging module, so that in subsequent steps, the first battery and the second battery can be separately charged with high current through the corresponding fast charging modules.

Step 1003: Charge the first battery and the second battery separately.

Corresponding to step 1002, after the terminal device adjusts the circuit structure of the charging circuit through the control module, the terminal device can adopt a fast charging method, that is, a large current charging method, to quickly charge the first battery and the second battery respectively.

Specifically, as shown in Figure 4 or Figure 5, the terminal device can send an instruction to the charging module through the control module, instructing the charging module to stop charging the first battery and the second battery, and power the terminal device based on the power provided by the first battery and the second battery through the charging module.

At the same time, the terminal device can also send instructions to the first fast charging module and the second fast charging module through the control module, instructing the switching components in the first fast charging module and the second fast charging module to turn on, so that the first fast charging module and the second fast charging module start to output current, so that the first battery and the second battery can be charged separately through the first fast charging module and the second fast charging module.

Step 1004: adjust the first voltage and the second voltage according to the second voltage threshold.

The second voltage threshold is a preset voltage parameter used to determine whether the first voltage and the second voltage are balanced. For example, if the voltage difference between the first voltage and the second voltage is greater than the second voltage threshold, it means that the voltage difference between the first battery and the second battery is large, and the first voltage and the second voltage need to be adjusted to ensure the balance between the two.

During the process of charging the first battery and the second battery separately, the terminal device can continue to detect the first voltage and the second voltage, and can adjust the two voltages in real time so that the voltage balance can be maintained between the first battery and the second battery.

Similar to step 1001, after the terminal device uses fast charging to charge the first battery and the second battery with a large current respectively, the terminal device can continue to detect the first voltage and the second voltage through the first detection module and the second detection module.

Accordingly, the terminal device can calculate according to the detection result obtained by the control module, that is, calculate according to the first voltage and the second voltage to obtain the voltage difference between the two. Afterwards, the control module can compare the calculated voltage difference with the preset second voltage threshold to obtain the magnitude relationship between the voltage difference and the second voltage threshold.

If the calculated voltage difference is less than or equal to the second voltage threshold, it means that the difference between the first voltage and the second voltage is small, and the control module does not need to adjust the voltage across the first battery and the voltage across the second battery. Accordingly, the control module does not need to adjust the voltage and current output by the first fast charging module and the second fast charging module.

If the calculated voltage difference is greater than the second voltage threshold, it means that the voltage difference between the first voltage and the second voltage is large, which will cause voltage imbalance between the first battery and the second battery. Therefore, the control module needs to adjust the first voltage and the second voltage so that the calculated voltage difference is less than or equal to the second voltage threshold.

Furthermore, in the process of adjusting the first voltage and the second voltage, the control module can increase the voltage and current output by a certain fast charging module, or reduce the voltage and current output by a certain fast charging module. It can also simultaneously control one fast charging module to increase the output voltage and current, and control another fast charging module to reduce the output voltage and current. In addition, it can also send instructions to the adapter to instruct the adapter to adjust the output voltage and current through the sent instructions, so as to cooperate with each fast charging module to achieve the adjustment of the first voltage and the second voltage. The embodiment of the present application does not limit the way in which the control module adjusts the first voltage and the second voltage.

In the following, the first voltage is higher than the second voltage, and the voltage difference between the two is greater than the second voltage threshold. The process of adjusting each fast charging module is explained below.

Specifically, since the voltage across the first battery is higher, the control module can send instructions to the first fast charging module to control the first fast charging module to reduce the output voltage and current, thereby charging the first battery with a smaller current to reduce the rate at which the first voltage gradually increases, so that after a period of time, the first voltage and the second voltage can be balanced.

Alternatively, the control module can send instructions to the second fast charging module to control the second fast charging module to increase the output voltage and current, thereby charging the second battery with a larger current, thereby quickly increasing the second voltage, and thereby maintaining a balance between the first voltage and the second voltage.

Alternatively, the control module can send instructions to the first fast charging module and the second fast charging module at the same time, so that the first fast charging module reduces the output voltage and current and the second fast charging module increases the low output voltage and current, thereby further accelerating the realization of voltage balance between the first voltage and the second voltage.

Alternatively, the control module may also send a communication instruction to the adapter through the terminal device, and the communication instruction is used to instruct the adapter to adjust the output voltage and current. Accordingly, the adapter can adjust the output voltage and current according to the communication instruction. When the adapter adjusts the output voltage and current, the voltage and current input to the first fast charging module and the second fast charging module also change accordingly, and the current output by the first fast charging module and the second fast charging module also changes, thereby achieving voltage balance between the first voltage and the second voltage.

Correspondingly, through the detection of the first battery and the second battery by the first detection module and the second detection module respectively, when the control module again determines that the voltage difference between the first voltage at both ends of the first battery and the second voltage at both ends of the second battery is less than or equal to the preset second voltage threshold, the control module can again send instructions to the first fast charging module and/or the second fast charging module, so that the first fast charging module and/or the second fast charging module can restore the voltage and current output by the first fast charging module and/or the second fast charging module according to the received instructions.

Step 1005: Charge the first battery and the second battery in a constant voltage charging manner according to the third voltage threshold in combination with the first voltage and the second voltage.

The third voltage threshold is a preset voltage parameter used to determine whether the battery needs to be charged in constant voltage mode. For example, when the battery voltage is greater than or equal to the third voltage threshold, the terminal device can charge the battery in constant voltage mode, that is, the terminal device controls the module so that the fast charging module maintains the output voltage unchanged to output current to charge the battery.

The control module of the terminal device can not only determine whether the voltage between the first battery and the second battery is balanced through the first detection module and the second detection module, but also determine whether the first battery and the second battery need to be charged in a constant voltage mode through the first detection module and the second detection module.

It should be noted that the process of step 1005 is similar to the process of step 1001 to step 1002, that is, the control module first obtains the first voltage and the second voltage through the first detection module and the second detection module, and then compares the obtained first voltage and the second voltage with the third voltage threshold. When the first voltage and the second voltage both reach the third voltage threshold, the control module can control the first fast charging module and the second fast charging module to charge the first battery and the second battery respectively by constant voltage charging.

Step 1006: According to the current threshold, in combination with the first voltage and the second voltage, and the first charging current input to the first battery and the second charging current input to the second battery, the state of the first switch device or the second switch device is adjusted again.

The current threshold is a preset current parameter used to determine whether the constant voltage charging mode needs to be terminated, that is, used to determine whether each battery of the battery pack can be charged through the charging module.

After the terminal device charges the first battery and the second battery in constant voltage mode, the first charging current input to the first battery and the second charging current input to the second battery will gradually decrease as the voltage across the batteries increases. When the first charging current and the second charging current decrease to a certain extent, the charging requirements of the first battery and the second battery can be met by the charging module, without the need to charge the first battery and the second battery separately through the fast charging module.

Correspondingly, the terminal device can adjust the first switching device or the second switching device through the control module to obtain a charging circuit as shown in Figure 3, Figure 6, Figure 7 or Figure 8, so that the switching device in the open state of the first switching device and the second switching device is switched to a closed state, so that in subsequent steps, the first battery and the second battery can be charged together through the charging module.

Specifically, after the terminal device is charged in constant voltage mode, the control module of the terminal device can obtain the first charging current input to the first battery and the second charging current input to the second battery, and calculate based on the first charging current and the second charging current to obtain the sum of the two, which is the total charging current.

After that, the control module can compare the total charging current with the preset current threshold to obtain the magnitude relationship between the two. If the total charging current is greater than the current threshold, it means that the charging module cannot provide a charging current that matches the total charging current, and you can continue The first battery and the second battery are charged separately by the first fast charging module and the second fast charging module respectively.

If the total charging current is less than or equal to the current threshold, it means that the charging module can independently provide a charging current that matches the total charging current. The control module can send an instruction to the switch device in the first switching device and the second switching device that is in the disconnected state, instructing the switch device to switch from the disconnected state to the closed state, thereby adjusting the circuit structure of the charging circuit so that the first battery is connected in parallel with the second battery and then connected in series with the charging module.

It should be noted that, in the process of obtaining the first charging current and the second charging current, the control module can feedback the magnitude of the currently output charging current to the control module through each fast charging module, and can also feedback the magnitude of the charging current input to each battery to the control module through each detection module. The embodiment of the present application does not specifically limit the way in which the control module obtains the charging current.

Step 1007: Charge the first battery and the second battery through the charging module until charging is completed.

Corresponding to step 1006, after the terminal device adjusts the charging circuit, the control module of the terminal device can send instructions to the first fast charging module, the second fast charging module and the charging module to control the first fast charging module and the second fast charging module to stop output, and control the charging module to charge the first battery and the second battery.

Specifically, the terminal device can first send instructions to the first fast charging module, the second fast charging module and the charging module respectively, so that the switch components in the first fast charging module and the second fast charging module can be turned off according to the instructions, thereby controlling the first fast charging module and the second fast charging module to stop charging the first battery and the second battery. At the same time, the charging module can control the switch components in the charging module to turn on according to the received instructions, so that the first battery and the second battery can be charged at the same time through the charging module until the first battery and the second battery are fully charged. Moreover, in the process of charging the first battery and the second battery through the charging module, the terminal device can be powered by the charging module.

To summarize, in the charging method provided in the embodiment of the present application, the control module adjusts the states of the first switching device and the second switching device according to the first voltage of the first battery and the second voltage of the second battery, so that the circuit structure of the charging circuit changes, and the first battery and the second battery can be fast charged separately through the first fast charging module and the second fast charging module, so that a larger current can be used to charge the battery in the fast charging stage, thereby reducing the time spent on charging the terminal device and improving the charging efficiency of the terminal device.

Moreover, in the process of fast charging the first battery and the second battery respectively, the control module can adjust the voltage and current output by the first fast charging module and/or the second fast charging module in real time according to the first voltage and the second voltage, so as to timely maintain the voltage balance between the first voltage and the second voltage, and avoid the situation where one battery discharges to another battery when the first battery and the second battery are charged again through the charging module, thereby improving the charging safety of the terminal device.

In addition, by detecting the first charging current and the second charging current, the terminal device can charge the first battery and the second battery again through the charging module after the first charging current and the second charging current are reduced to a certain level, so that the first battery and the second battery in parallel can be charged at the same time through the charging module, which can reduce the power consumption of the terminal device for charging.

It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The following introduces the terminal device involved in the embodiment of the present application. Please refer to Figure 11, which is a structural diagram of a terminal device provided in the embodiment of the present application.

The terminal device may include a processor 1110, an external memory interface 1120, an internal memory 1121, a universal serial bus (USB) interface 1130, a charging management module 1140, a power management module 1141, a battery 1142, an antenna 1, an antenna 2, a mobile communication module 1150, a wireless communication module 1160, an audio module 1170, a speaker 1170A, a receiver 1170B, a microphone 1170C, an earphone interface 1170D, a sensor module 1180, a button 1190, a motor 1191, an indicator 1192, a camera 1193, a display screen 1194, and a subscriber identification module (SIM) card interface 1195, etc. The sensor module 1180 may include a pressure sensor 1180A, a gyroscope sensor 1180B, an air pressure sensor 1180C, a magnetic sensor 1180D, an acceleration sensor 1180E, a distance sensor 1180F, a proximity light sensor 1180G, a fingerprint sensor 1180H, a temperature sensor 1180J, a touch sensor 1180K, an ambient light sensor 1180L, a bone conduction sensor 1180M, and the like.

Among them, the charging management module 1140 can be the charging circuit shown in Figures 3 to 9 above, the power management module 1141 can be a control module in the charging circuit, and the battery 1142 can be the battery pack shown in Figures 3 to 9 above, and the battery pack can include a first battery and a second battery. The following takes the charging management module 1140, the power management module 1141 and the battery 1142 as an example to continue to introduce the charging circuit provided in the embodiment of the present application.

It is to be understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the terminal device. In other embodiments of the present application, the terminal device may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

The processor 1110 may include one or more processing units, for example, the processor 1110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a memory, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and/or a neural-network processing unit (neural-network processing unit, NPU), etc. Among them, different processing units may be independent devices or integrated in one or more processors.

The controller can be the nerve center and command center of the terminal device. The controller can generate operation control signals according to the instruction operation code and timing signal to complete the control of fetching and executing instructions.

The processor 1110 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 1110 is a cache memory. The memory may store instructions or data that the processor 1110 has just used or cyclically used. If the processor 1110 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 1110, and thus improves the efficiency of the system.

In some embodiments, the processor 1110 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (SIM) interface, and/or a universal serial bus (USB) interface, etc.

The I2C interface is a bidirectional synchronous serial bus, including a serial data line (SDA) and a serial clock line (SCL). In some embodiments, the processor 1110 may include multiple groups of I2C buses. The processor 1110 may be coupled to the touch sensor 1180K, the charger, the flash, the camera 1193, etc. through different I2C bus interfaces. For example, the processor 1110 may be coupled to the touch sensor 1180K through the I2C interface, so that the processor 1110 communicates with the touch sensor 1180K through the I2C bus interface to realize the touch function of the terminal device.

The I2S interface can be used for audio communication. In some embodiments, the processor 1110 can include multiple groups of I2S buses. The processor 1110 can be coupled to the audio module 1170 via the I2S bus to achieve communication between the processor 1110 and the audio module 1170. In some embodiments, the audio module 1170 can transmit an audio signal to the wireless communication module 1160 via the I2S interface to achieve the function of answering a call through a Bluetooth headset.

The PCM interface can also be used for audio communication, sampling, quantizing and encoding analog signals. In some embodiments, the audio module 1170 and the wireless communication module 1160 can be coupled via a PCM bus interface. In some embodiments, the audio module 1170 can also transmit audio signals to the wireless communication module 1160 via the PCM interface to realize the function of answering calls via a Bluetooth headset. Both the I2S interface and the PCM interface can be used for audio communication.

The UART interface is a universal serial data bus for asynchronous communication. The bus can be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, the UART interface is generally used to connect the processor 1110 and the wireless communication module 1160. For example, the processor 1110 communicates with the Bluetooth module in the wireless communication module 1160 through the UART interface to implement the Bluetooth function. In some embodiments, the audio module 1170 can transmit an audio signal to the wireless communication module 1160 through the UART interface to implement the function of playing music through a Bluetooth headset.

The MIPI interface can be used to connect the processor 1110 with peripheral devices such as the display screen 1194 and the camera 1193. The MIPI interface includes a camera serial interface (CSI), a display serial interface (DSI), etc. In some embodiments, the processor 1110 and the camera 1193 communicate via the CSI interface to implement the shooting function of the terminal device. The processor 1110 and the display screen 1194 communicate via the DSI interface to implement the display function of the terminal device.

The GPIO interface can be configured by software. The GPIO interface can be configured as a control signal or as a data signal. In some embodiments, the GPIO interface can be used to connect the processor 1110 with the camera 1193, the display 1194, the wireless communication module 1160, the audio module 1170, the sensor module 1180, etc. The GPIO interface can also be configured as an I2C interface, an I2S interface, a UART interface, a MIPI interface, etc.

The USB interface 1130 is an interface that complies with USB standard specifications, and may be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface 1130 may be used to connect a charger to charge the terminal device, or may be used to connect the terminal device to peripheral devices. It can also be used to connect headphones and play audio through them. This interface can also be used to connect other terminal devices, such as AR devices.

It is understandable that the interface connection relationship between the modules illustrated in the embodiment of the present invention is only a schematic illustration and does not constitute a structural limitation on the terminal device. In other embodiments of the present application, the terminal device may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

The charging management module 1140 is used to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 1140 may receive charging input from a wired charger through the USB interface 1130. In some wireless charging embodiments, the charging management module 1140 may receive wireless charging input through a wireless charging coil of a terminal device. While the charging management module 1140 is charging the battery 1142, it may also power the terminal device through the power management module 1141.

The power management module 1141 is used to connect the battery 1142, the charging management module 1140 and the processor 1110. The power management module 1141 receives input from the battery 1142 and/or the charging management module 1140, and supplies power to the processor 1110, the internal memory 1121, the external memory, the display screen 1194, the camera 1193, and the wireless communication module 1160. The power management module 1141 can also be used to monitor parameters such as battery capacity, battery cycle number, battery health status (leakage, impedance), etc. In some other embodiments, the power management module 1141 can also be set in the processor 1110. In other embodiments, the power management module 1141 and the charging management module 1140 can also be set in the same device.

The internal memory 1121 can be used to store computer executable program codes, which include instructions. The processor 1110 executes various functional applications and data processing of the terminal device by running the instructions stored in the internal memory 1121. The internal memory 1121 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area may store data created during the use of the terminal device (such as audio data, a phone book, etc.), etc. In addition, the internal memory 1121 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc.

The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the system embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may be a separate unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device that can carry the computer program code to the terminal device or the control module of the terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. For example, USB flash drive, mobile hard disk, disk or optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

Finally, it should be noted that the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A charging circuit, characterized in that the charging circuit comprises: a control module, a charging module, a first fast charging module, a second fast charging module, a first detection module, a second detection module and a first switch device;

The first fast charging module and the first detection module are both connected to the first battery in the battery pack, and the first detection module is also connected to the control module;

The second fast charging module and the second detection module are both connected to the second battery in the battery pack, and the second detection module is also connected to the control module;

The first switch device is connected between the charging module and the first battery, and the charging module is connected to the second battery;

The control module is also respectively connected to the charging module, the first fast charging module, the second fast charging module and the first switching device, and is used to control the on or off of the charging module, the first fast charging module, the second fast charging module and the first switching device according to the voltage across the first battery detected by the first detection module and the voltage across the second battery detected by the second detection module.
The charging circuit according to claim 1, characterized in that the charging circuit further comprises: a second switching device;

The second switch device is connected between the charging module and the second battery.
The charging circuit according to claim 1 or 2, characterized in that the first switching device is integrated in the charging module.
The charging circuit according to claim 2, characterized in that the first switching device and the second switching device are both integrated in the charging module.
The charging circuit according to claim 3 or 4, characterized in that the first detection module and the second detection module are both integrated in the charging module;

The first detection module is used to send the detected voltage across the first battery to the control module;

The second detection module is used to send the detected voltage across the second battery to the control module.
The charging circuit according to any one of claims 1 to 4 is characterized in that the first detection module is integrated in the first fast charging module, and the second detection module is integrated in the second fast charging module.
The charging circuit according to any one of claims 1 to 6, characterized in that the charging circuit further comprises: a third fast charging module, a third detection module and a third switch device;

The third fast charging module and the third detection module are both connected to the third battery in the battery pack, and the third detection module is also connected to the control module;

The third switch device is connected between the charging module and the third battery.
A charging method, characterized in that it is applied to a charging circuit, the charging circuit comprising: a charging module, a first fast charging module, a second fast charging module and a first switching device, the charging module is used to charge a first battery and a second battery in a battery pack, the first switching device is connected in series between the charging module and the first battery, the first fast charging module is connected to the first battery, and the second fast charging module is connected to the second battery;

The charging method comprises:

Acquire a first voltage across the first battery and a second voltage across the second battery;

According to the first voltage and the second voltage, the state of the first switching device is adjusted so that the circuit structure of the charging circuit changes, and the first battery is charged through the first fast charging module and the second battery is charged through the second fast charging module.
The method according to claim 8, characterized in that adjusting the state of the first switching device according to the first voltage and the second voltage comprises:

Comparing the first voltage and the second voltage with a preset first voltage threshold respectively;

If the first voltage and the second voltage are both greater than the first voltage threshold, adjusting the state of the first switch device;

If at least one of the first voltage and the second voltage is less than or equal to the first voltage threshold, the state of the first switching device is maintained unchanged.
The method according to claim 8, characterized in that after charging the first battery through the first fast charging module and charging the second battery through the second fast charging module, the method further comprises:

Acquire the first voltage across the first battery and the second voltage across the second battery to obtain a voltage difference between the first voltage and the second voltage;

According to the magnitude relationship between the voltage difference and the preset second voltage threshold, the first fast charging module and/or the first fast charging module are Second, adjust the current output by the fast charging module.
The method according to claim 10, characterized in that the adjusting the current output by the first fast charging module and/or the second fast charging module according to the magnitude relationship between the voltage difference and a preset second voltage threshold comprises:

If the voltage difference is less than or equal to the second voltage threshold, the current output by the first fast charging module and/or the second fast charging module remains unchanged;

If the voltage difference is greater than the second voltage threshold and the first voltage is greater than the second voltage, reducing the current output by the first fast charging module and/or increasing the current output by the second fast charging module;

If the voltage difference is greater than the second voltage threshold and the first voltage is less than the second voltage, increasing the current output by the first fast charging module and/or reducing the current output by the second fast charging module;

The magnitude relationship between the first voltage and the second voltage is determined when calculating the voltage difference.
The method according to claim 8, characterized in that after charging the first battery through the first fast charging module and charging the second battery through the second fast charging module, the method further comprises:

Acquire the first voltage across the first battery and the second voltage across the second battery, and compare the first voltage and the second voltage with a preset third voltage threshold, respectively;

If the first voltage and the second voltage are both greater than or equal to a preset third voltage threshold, the first battery is charged by the first fast charging module using a constant voltage charging method, and the second battery is charged by the second fast charging module using a constant voltage charging method.
The method according to claim 12 is characterized in that after charging the first battery by constant voltage charging through the first fast charging module and charging the second battery by constant voltage charging through the second fast charging module, the method further comprises:

Acquire a first charging current corresponding to the first battery and a second charging current corresponding to the second battery;

According to the first charging current and the second charging current, combined with a preset current threshold, the state of the first switching device is adjusted again, and the first battery and the second battery are charged simultaneously through the charging module until charging is completed.
The method according to claim 13, characterized in that the step of adjusting the state of the first switching device again according to the first charging current and the second charging current in combination with a preset current threshold comprises:

Calculate the total charging current according to the first charging current and the second charging current;

Comparing the total charging current with the current threshold;

If the total charging current is greater than the current threshold, the first battery and the second battery are charged respectively by the first fast charging module and the second fast charging module in a constant voltage charging manner;

If the total charging current is less than or equal to the current threshold, the state of the first switching device is adjusted again.
A charging system, characterized in that the charging system comprises: a terminal device and an adapter, wherein the terminal device comprises the charging circuit according to any one of claims 1 to 7;

The adapter is connected to the charging circuit of the terminal device through the charging port of the terminal device;

The terminal device or the charging circuit adopts the charging method according to any one of claims 8 to 14 to charge the battery pack of the terminal device.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the charging method according to any one of claims 8 to 14 is implemented.
A chip system, characterized in that the chip system includes a memory and a processor, and the processor executes a computer program stored in the memory to implement the charging method as described in any one of claims 8 to 14.