WO2024120034A1

WO2024120034A1 - Charging control method and apparatus

Info

Publication number: WO2024120034A1
Application number: PCT/CN2023/126555
Authority: WO
Inventors: 寇卫萍; 龚勇; 肖建华
Original assignee: 中兴通讯股份有限公司
Priority date: 2022-12-09
Filing date: 2023-10-25
Publication date: 2024-06-13
Also published as: CN118174392A

Abstract

Provided in the embodiments of the present disclosure are a charging control method and apparatus. The method comprises: according to a preset target temperature, determining a heat balance current corresponding to a device to be charged; acquiring a device temperature of said device during a charging process; and according to the device temperature, the target temperature and the heat balance current, adjusting a charging current of said device.

Description

A charging control method and device

CROSS-REFERENCE TO RELATED APPLICATIONS

This disclosure is based on Chinese patent application CN202211581994.1, filed on December 9, 2022, with the invention name “A Charging Control Method and Device”, and claims the priority of the patent application, and all the contents disclosed therein are incorporated into this disclosure by reference.

Technical Field

The present disclosure relates to the field of rechargeable batteries, and in particular to a charging control method and device.

Background technique

In order to meet market demand, fast charging technologies and products for various terminals are constantly updated to achieve high-power fast charging. At present, the fast charging power of mobile phones has reached 120W and above. The charging current of fast charging batteries is 6 to 10 times that of ordinary batteries, which significantly shortens the charging time. With the increase of charging current, the heat generated by batteries and chips during charging increases. The heating rate of fast charging is much higher than that of ordinary charging. The high temperature caused by fast charging will also affect the user experience and accelerate the aging of electronic components.

There are mainly the following charging current solutions for regulating temperature in related technologies:

1. Divide into different temperature zones, and adjust the charging voltage and charging current in different temperature zones until the battery is fully charged;

Second, use multiple parameters such as the phone temperature to adjust the charging voltage and charging current until the battery is fully charged. For example, according to the two parameters of temperature and temperature change rate, switch between two constant current charging and constant voltage charging modes;

3. By establishing a battery charging model, the charging curve is simulated and the simulation results are run to calibrate the charging process.

However, the above methods still have the following problems: Method 1. It cannot achieve continuous control of any temperature, and the temperature change is not real-time. The reduction or increase of the charging current cannot control the temperature in real time. Method 2. It only switches between constant voltage charging and constant current charging modes, and cannot achieve continuous and fine control of the charging voltage and charging current at any temperature. Method 3. For other hardware models, it is necessary to re-test multiple times and re-simulate and predict the fast charging curve, which cannot be applied to various models of charging terminals.

In summary, there is no good solution to the charging heating problem caused by shortening the charging time by increasing the charging power in the related art.

Summary of the invention

According to one embodiment of the present disclosure, a charging control method is provided, the method comprising: determining a thermal balance current corresponding to a device to be charged according to a preset target temperature; obtaining a device temperature of the device to be charged during the charging process; and adjusting the charging current of the device to be charged according to the device temperature, the target temperature and the thermal balance current.

According to another embodiment of the present disclosure, a charging device is provided, which includes: a determination module, used to determine a thermal balance current corresponding to a device to be charged according to a preset target temperature; a detection module, used to obtain a device temperature of the device to be charged during the charging process; and an adjustment module, used to adjust the charging current of the device to be charged according to the device temperature, the target temperature and the thermal balance current.

According to another embodiment of the present disclosure, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program executes the steps of any of the above method embodiments when executed by a processor.

According to another embodiment of the present disclosure, an electronic device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a hardware structure block diagram of a charging control method according to an embodiment of the present disclosure;

FIG2 is a flow chart of a charging control method according to an embodiment of the present disclosure;

FIG3 is a flow chart of a thermal balance current debugging method according to an embodiment of the present disclosure;

FIG4 is a schematic diagram of temperature variation characteristics corresponding to different initial thermal equilibrium currents in an embodiment of the present disclosure;

FIG. 5 is a block diagram of a charging control device according to an embodiment of the present disclosure.

Detailed ways

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and in combination with the embodiments.

It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

The method embodiments provided in the embodiments of the present disclosure can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a computer terminal as an example, FIG1 is a hardware structure block diagram of the charging control method of the embodiment of the present disclosure. As shown in FIG1, the hardware board may include one or more (only one is shown in FIG1) processors 12 (the processor 12 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device) and a memory 14 for storing data, wherein the above-mentioned mobile terminal may also include a transmission device 16 and an input and output device 18 for communication functions. It can be understood by those skilled in the art that the structure shown in FIG1 is only for illustration and does not limit the structure of the above-mentioned mobile terminal. For example, the mobile terminal may also include more or fewer components than those shown in FIG1, or have a configuration different from that shown in FIG1.

The memory 14 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the charging control method in the embodiment of the present disclosure. The processor 12 executes various functional applications and charging control methods by running the computer programs stored in the memory 14, that is, the above-mentioned method is implemented. The memory 14 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 14 may further include a memory remotely arranged relative to the processor 12, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

The transmission device 16 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider. In one example, the transmission device 16 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 16 can be a radio frequency (Radio Frequency, referred to as RF) module, which is used to communicate with the Internet wirelessly.

In this embodiment, a charging control method is provided. FIG. 2 is a flow chart of the charging control method according to the embodiment of the present disclosure. As shown in FIG. 2 , the flow chart includes the following steps:

Step S202, determining a thermal balance current corresponding to the device to be charged according to a preset target temperature;

Step S204, obtaining the device temperature of the device to be charged during the charging process;

Step S206: adjusting the charging current of the device to be charged according to the device temperature, the target temperature and the thermal balance current.

In this embodiment, a thermal balance current is used as a control target for fast charging. The thermal balance current is a charging current that can make the heat generation and heat dissipation of the device to be charged reach a thermal balance state, thereby keeping the temperature of the device to be charged unchanged during the charging process.

Through the embodiments of the present disclosure, the thermal equilibrium state is used as the control target of fast charging, and precise control of the temperature is achieved, which not only ensures that the charging current will not be significantly reduced during the charging process, thereby improving the charging efficiency, but also enables the charging temperature to be stabilized within an appropriate range, thereby extending the battery life. It can also be applicable to terminal devices of different models, and solves the charging heating problem caused by shortening the charging time by increasing the charging power in the related technology. It can effectively suppress the heating phenomenon of devices during the fast charging process and improve the user experience.

In this embodiment, step S206 may specifically include:

Step S2061, determining a corresponding relationship between a charging current and a device temperature of the device to be charged according to the target temperature and the thermal balance current;

Step S2062, when the device temperature is less than or equal to a preset reference temperature, setting the charging current to a maximum charging current supported by the device to be charged;

Step S2063: when the device temperature is greater than the reference temperature, determine the charging current corresponding to the device temperature according to the corresponding relationship between the charging current and the device temperature.

In this embodiment, the corresponding relationship between the charging current and the device temperature in step S2061 is:

In this embodiment, the reference temperature in steps S2062 and S2063 can be adjusted as needed, thereby achieving the effect of early adjustment or delayed adjustment of the charging current.

In this embodiment, step S2063 may specifically include: determining the charging current corresponding to the device temperature according to the following formula:

In this embodiment, step S206 may further specifically include: when the device temperature is equal to the target temperature, setting the charging current to the thermal balance current.

Furthermore, the charging device will continue to charge with a thermal balance current, and the device temperature will be maintained at a target temperature until charging is completed.

In this embodiment, before step S202, the method further includes: step S201, determining the thermal equilibrium current corresponding to the target temperature of the device to be charged in a thermal equilibrium state through charging debugging.

In this embodiment, due to the different device models and battery models of the charging devices, the corresponding thermal balance currents at the same temperature may be different. Therefore, different charging devices can perform charging debugging through step S201 during the initial charging process or during the device initialization process to obtain a more accurate thermal balance current.

In this embodiment, step S201 may specifically include:

Step S2011, setting a debugging current corresponding to the target temperature;

Step S2012, using the debugging current as the charging current of the device to be charged to perform constant current charging;

Step S2013, obtaining the device temperature of the device to be charged after a preset charging time;

Step S2014, when the device temperature is not equal to the target temperature, adjusting the debugging current according to the device temperature;

Step S2015: when the device temperature is equal to the target temperature, determining that the debugging current is the thermal balance current.

In this embodiment, step S2014 specifically includes:

Determining a debugging relationship between a charging current and a device temperature of the device to be charged according to the target temperature and the debugging current;

When the device temperature is greater than the target temperature, reducing the debugging current according to the debugging relationship;

When the device temperature is lower than the target temperature, the debugging current is increased according to the debugging relationship.

In this embodiment, the debugging relationship between the charging current and the device temperature is:

Among them, I is the charging current of the device to be charged, I _max is the maximum charging current, I _test is the debugging current, t is the device temperature, t _end is the target temperature, and t _base is the reference temperature.

In this embodiment, when the device temperature is greater than the target temperature, reducing the debugging current according to the debugging relationship specifically includes:

The first current corresponding to the first temperature is determined according to the following formula:

Wherein, I(t _end +1) is the first current, and t _end +1 is the first temperature;

When the device temperature is greater than the first temperature, adjusting the debugging current to a value of the first current;

When the device temperature is lower than the first temperature, the debugging current is adjusted to a value between the debugging current and the first current according to a weight ratio between the target temperature and the first temperature.

In this embodiment, if the device temperature is continuously greater than the first temperature, it means that the current debugging current is much greater than the thermal equilibrium current corresponding to the target temperature. If the device temperature is greater than the target temperature and less than the first temperature, or the device temperature oscillates between the target temperature and the first temperature, it means that the current debugging current is close to the thermal equilibrium current and can be slightly reduced.

In this embodiment, when the device temperature is lower than the target temperature, increasing the debugging current according to the debugging relationship specifically includes:

The second current corresponding to the second temperature is determined according to the following formula:

Wherein, I(t _end -1) is the second current, and t _end -1 is the second temperature;

When the device temperature is lower than the second temperature, adjusting the debugging current to a value of the second current;

When the device temperature is greater than the second temperature, the debugging current is adjusted to a value between the debugging current and the second current according to a weight ratio between the target temperature and the second temperature.

In this embodiment, if the device temperature is continuously lower than the second temperature, it means that the current debugging current is much lower than the target temperature. If the device temperature is greater than the second temperature and less than the target temperature, or the device temperature oscillates between the second temperature and the target temperature, it means that the current debugging current is close to the thermal equilibrium current and can be slightly increased.

In this embodiment, increasing the target temperature by a preset temperature threshold value may obtain a first temperature, and decreasing the target temperature by a preset temperature threshold value may obtain a second temperature. The preset temperature threshold value is not limited to 1.

In this embodiment, the debugging relationship between the charging current and the device temperature of the device to be charged in step S2014 will change with the adjustment of the debugging current, and the debugging current needs to be adjusted according to the updated debugging relationship until the device temperature detected in real time continues to be equal to the target temperature.

In this embodiment, through the above steps S202 to S206, the target temperature and the thermal balance current corresponding to the device to be charged are used as the charging control target, which ensures that the device temperature during the charging process is not higher than the target temperature, and realizes the precise control of the charging temperature. The disclosed embodiment can also obtain the corresponding thermal balance current according to different target temperatures and different device models, and has a wider range of applications.

FIG3 is a flow chart of a thermal balance current debugging method according to an embodiment of the present disclosure. As shown in FIG3 , the method includes the following steps:

Step S301, setting the current value in thermal equilibrium state to M;

Step S302, substituting the detected temperature t into the relationship, calculating the charging current and starting charging;

Step S303, determining whether the temperature is stable at t _end ;

Step S304: if the result of the judgment is no, a new thermal equilibrium state current value M' is calculated according to the temperature change characteristics, and M=M';

Step S305: if the result of the judgment is yes, the current value in the thermal equilibrium state is determined to be I _end ;

In this embodiment, the thermal equilibrium current value (debugging current) M is first assumed. During the charging process of the mobile phone, M is firstly used as the control target, that is, I _end =M, and then the detected temperature (device temperature) t of the mobile phone is obtained in real time.

In this embodiment, step S302 can specifically calculate the charging current I by the following relationship:

In this embodiment, I _max is the maximum charging current, I _end is the thermal balance current, t is the current device temperature, t _end is the target temperature, t _base is the reference temperature of temperature control, and during the thermal balance current debugging process, the debugging current I _test can be used to replace the actual thermal balance current I _end .

In this embodiment, the maximum charging current I _max can be set according to the maximum charging current of the battery charging specification, and the temperature control reference temperature t _base can be set according to demand. The debugging process can achieve the effect of early or delayed adjustment of the charging current by modifying t _base .

In this embodiment, the charging current corresponding to any temperature parameter can be calculated through the relationship between the charging current and the device temperature in step S302, thereby achieving continuous linear regulation of the charging current.

In this embodiment, step S302 may specifically include the following situations:

Case 1: If the temperature of the mobile phone is lower than the target temperature, before the temperature of the mobile phone reaches the temperature control reference temperature, the charging current of the mobile phone is I=I _max .

In case 2, when the temperature of the mobile phone exceeds the reference temperature, regulation begins. When the temperature of the mobile phone rises from the current temperature to the target temperature, the current is regulated from the maximum charging current to the thermal balance current.

Case 3: If the initial charging temperature is higher than the target temperature, according to the calculation result of the relationship, the charging current I is lower than the thermal equilibrium current. At this time, the temperature of the mobile phone will decrease. When the temperature of the mobile phone drops from the current temperature to the target temperature t _end , the current is regulated to the thermal equilibrium state. Then, the charging current is maintained at I _end _and the charging temperature is maintained at the target temperature until the mobile phone is fully charged.

In this embodiment, it is assumed that the actual thermal equilibrium current value is N. Since the corresponding thermal equilibrium currents of different device models, different battery models, and different ambient temperatures are different, the initially set thermal equilibrium state current value M may be different from N and needs to be adjusted during the charging process.

FIG4 is a schematic diagram of temperature change characteristics corresponding to different initial thermal equilibrium currents in an embodiment of the present disclosure. As shown in FIG4 , the temperature change in step S303 can be specifically divided into the following three types:

The first one is M=N, that is, the initial thermal equilibrium current value is equal to the actual thermal equilibrium current value. Then, when the charging current is adjusted to M, the temperature of the mobile phone is stabilized at t _end .

The second type is M>N, that is, the initial thermal equilibrium current value is higher than the actual thermal equilibrium current value. Then, when the charging current is adjusted to M, the temperature of the mobile phone is higher than t _end .

Specifically, if the temperature oscillates between t _end and t _end +1, it means that M is slightly higher than N. Substitute t _end and t _end +1 into the relationship in step S302, calculate the charging currents I(t _end ) and I(t _{end +1) corresponding to t end and t end} ₊₁ _, and calculate a value between I(t _end ) and I(t _end +1) as the thermal balance current M' according to the statistical weight ratios of t _end and t _end +1; if the temperature is continuously greater than or equal to t _end +1, it means that M is much higher than N, and calculate the charging current I(t _end +1) corresponding to t _end +1 as the thermal balance current M'.

The third type is M＜N, that is, the initial thermal equilibrium current value is lower than the actual thermal equilibrium current value, then when the charging current is adjusted to M, the temperature of the mobile phone is lower than t _end .

In this embodiment, the temperature change characteristics in step S304 correspond to the second and third temperature change conditions described above, and step S305 corresponds to the first temperature change condition.

In this embodiment, t _end +1 is equivalent to the first temperature, t _end -1 is equivalent to the second temperature, the corresponding I(t _end ) is the debugging current, I(t _end +1) is the first current, and I(t _end -1) is the second current.

Specifically, the debugging current is I(t _end )=I _test ; the first current is The second current is

Further, when the initial thermal equilibrium current value (debugging current) I _test =M, the first current is The second current is

In this embodiment, after step S304, the debugging current I _test =M' is substituted into the relational expression in step S302 and the calculation is repeated until M=N is satisfied, and step S305 is executed.

In this embodiment, the current-temperature relationship in the thermal equilibrium state in step S302 can be used to calculate the charging current corresponding to any temperature parameter, thereby achieving continuous linear regulation of the charging current. Through steps S301 to S305, the thermal equilibrium current corresponding to any device to be charged and any target temperature can be determined, thereby expanding the scope of application of the disclosed embodiment.

In another embodiment of the present disclosure, taking the target temperature t _end = 40°C and the initial input debugging current as 8000mA as an example, assuming that the actual thermal balance current I _end is 6000mA, the current room temperature is 25°C, the initial temperature of the mobile phone is 25°C, the maximum charging current of the battery I _max = 12000mA, and the reference temperature t _base = 32°C.

In this embodiment, charging the device for the first time specifically includes the following steps:

Step S1, firstly calculate the thermal equilibrium current at 40°C;

In this embodiment, step S1 may specifically include:

Step S1a, start charging, obtain the mobile phone temperature t in real time, and calculate the charging current I (first take I _test =8000mA as the control target) through the relationship between the charging current and the mobile phone temperature.

Specifically, when the phone temperature t≤32℃, the charging current I＝12000mA; when the phone temperature 32℃＜t≤40℃, the charging current If the mobile phone temperature t＝35℃, the calculated charging current I＝10500mA. When the charging current I decreases to I _test ＝8000mA, the mobile phone temperature t＝40℃.

Step S1b, since the debugging current 8000mA is higher than the actual thermal balance current 6000mA, the heat generated by the mobile phone during charging is higher than the heat dissipation, and the temperature of the mobile phone will continue to rise, that is, the temperature of the mobile phone t＞40℃. And since 8000mA is much higher than 6000mA, the temperature of the mobile phone t will continue to be ≥41℃, and it is necessary to calculate the charging current I＝7500mA corresponding to 41℃ as the thermal balance current M', and use the calculated M'＝7500mA as I _test input, and repeat steps S1a to S1b.

Repeat steps S1a to S1b for many times until the thermal equilibrium current I _end approaches the actual value of the thermal equilibrium current 6000 mA and the temperature of the mobile phone is stabilized at 40° C. The I _test value is used as the input of step S2.

Step S2, control the charging temperature with the thermal balance current of 6000mA as the target, detect the temperature t of the mobile phone, and substitute the following relationship to calculate the charging current:

Specifically, during the charging process of the mobile phone, if the temperature t of the mobile phone does not reach 32°C, the charging current I of the mobile phone is 12000mA. When the temperature t of the mobile phone exceeds 32°C, the regulation begins. When the temperature of the mobile phone rises from the current temperature t to 40°C, the current is continuously regulated from 12000mA to 6000mA. If the temperature of the mobile phone is higher than 40°C, the charging current I is lower than 6000mA. At this time, the temperature of the mobile phone will decrease. When the temperature of the mobile phone drops from the current temperature t to 40°C, the current is regulated to 6000mA. Subsequently, the charging current is maintained at 6000mA, and the charging temperature is maintained at the target temperature of 40°C until the mobile phone is fully charged.

Through the embodiments of the present disclosure, the temperature change characteristics can be counted during the initial charging of the device, and then the thermal balance current corresponding to any target temperature can be calculated, and the charging temperature can be controlled below any target temperature, thereby solving the problem of heat generation during fast charging of the device.

Through the embodiments of the present disclosure, linear regulation of charging temperature and charging current can be achieved, ensuring that the charging current is always greater than or equal to the thermal equilibrium current, thereby shortening the charging time while ensuring the charging efficiency of the mobile phone.

According to another aspect of the embodiments of the present disclosure, a charging device is also provided.

FIG. 5 is a block diagram of a charging control device according to an embodiment of the present disclosure. As shown in FIG. 5 , the device includes:

A determination module 502, configured to determine a thermal balance current corresponding to the device to be charged according to a preset target temperature;

A detection module 504 is used to obtain the device temperature of the device to be charged during the charging process;

The adjustment module 506 is configured to adjust the charging current of the device to be charged according to the device temperature, the target temperature and the thermal balance current.

In this embodiment, the adjustment module 506 may specifically include:

a relationship determination unit, configured to determine a corresponding relationship between a charging current and a device temperature of the device to be charged according to the target temperature and the thermal balance current;

A first adjustment unit, configured to set the charging current to a maximum charging current supported by the device to be charged when the device temperature is less than or equal to a preset reference temperature;

The second adjustment unit is configured to determine the charging current corresponding to the device temperature according to a corresponding relationship between the charging current and the device temperature when the device temperature is greater than the reference temperature.

In this embodiment, the relationship determination unit is further used to determine the corresponding relationship between the charging current and the device temperature as follows:

Among them, I is the charging current of the device to be charged, I _max is the maximum charging current, I _end is the thermal balance current, t is the device temperature, t _end is the target temperature, and t _base is the reference temperature.

In this embodiment, the second adjustment unit is further configured to determine the charging current corresponding to the device temperature according to the following formula:

In this embodiment, the adjustment module 506 further includes a third adjustment module, which is used to set the charging current to the thermal balance current when the device temperature is equal to the target temperature.

In this embodiment, the charging device also includes: a current debugging module, which is used to set a debugging current corresponding to the target temperature; use the debugging current as the charging current of the device to be charged for constant current charging; obtain the device temperature of the device to be charged after a preset charging time; when the device temperature is not equal to the target temperature, adjust the debugging current according to the device temperature; when the device temperature is equal to the target temperature, determine that the debugging current is the thermal balance current.

In this embodiment, the current debugging module is further used to determine the debugging relationship between the charging current and the device temperature as follows:

In this embodiment, the current debugging module is further used to determine the first current corresponding to the first temperature according to the following formula:

In this embodiment, the current debugging module is further used to determine the second current corresponding to the second temperature according to the following formula:

An embodiment of the present disclosure further provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above method embodiments are executed.

In an exemplary embodiment, the computer-readable storage medium may include but is not limited to: a USB flash drive, a read-only storage medium, Various media that can store computer programs include Read-Only Memory (ROM), Random Access Memory (RAM), mobile hard disk, magnetic disk or CD, etc.

An embodiment of the present disclosure further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

In an exemplary embodiment, the electronic device may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.

For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present disclosure can be implemented by a general-purpose computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present disclosure is not limited to any specific combination of hardware and software.

The above description is only an exemplary embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

A charging control method, the method comprising:

Determine the thermal balance current corresponding to the device to be charged according to the preset target temperature;

Acquiring the device temperature of the device to be charged during the charging process;

The charging current of the device to be charged is adjusted according to the device temperature, the target temperature and the thermal balance current.
The method according to claim 1, wherein adjusting the charging current of the device to be charged according to the device temperature, the target temperature and the thermal balance current comprises:

Determining a corresponding relationship between a charging current and a device temperature of the device to be charged according to the target temperature and the thermal balance current;

When the device temperature is less than or equal to a preset reference temperature, setting the charging current to a maximum charging current supported by the device to be charged;

When the device temperature is greater than the reference temperature, the charging current corresponding to the device temperature is determined according to the corresponding relationship between the charging current and the device temperature.
The method according to claim 2, wherein

The corresponding relationship between the charging current and the device temperature is:

Among them, I is the charging current of the device to be charged, I max is the maximum charging current, I end is the thermal equilibrium current, t is the device temperature, t end is the target temperature, and t base is the reference temperature.
The method according to claim 3, wherein determining the charging current corresponding to the device temperature according to the corresponding relationship between the charging current and the device temperature comprises:

The charging current corresponding to the device temperature is determined according to the following formula:
The method according to claim 2, wherein adjusting the charging current of the device to be charged according to the device temperature, the target temperature and the thermal balance current, further comprises:

When the device temperature is equal to the target temperature, the charging current is set to the thermal equilibrium current.
The method according to claim 1, wherein, before determining the thermal balance current corresponding to the device to be charged according to the preset target temperature, the method further comprises:

Setting the debugging current corresponding to the target temperature;

Using the debugging current as the charging current of the device to be charged to perform constant current charging;

Obtaining the device temperature of the device to be charged after a preset charging time;

When the device temperature is not equal to the target temperature, adjusting the debugging current according to the device temperature;

When the device temperature is equal to the target temperature, the debugging current is determined to be the thermal balance current.
The method according to claim 6, wherein the debugging current is adjusted according to the device temperature, include:

Determining a debugging relationship between a charging current and a device temperature of the device to be charged according to the target temperature and the debugging current;

When the device temperature is greater than the target temperature, reducing the debugging current according to the debugging relationship;

When the device temperature is lower than the target temperature, the debugging current is increased according to the debugging relationship.
The method according to claim 7, wherein:

The debugging relationship between the charging current and the device temperature is:

Among them, I is the charging current of the device to be charged, I max is the maximum charging current supported by the device to be charged, I test is the debugging current, t is the device temperature, t end is the target temperature, and t base is a preset reference temperature.
The method according to claim 8, wherein, when the device temperature is greater than the target temperature, reducing the debugging current according to the debugging relationship comprises:

The first current corresponding to the first temperature is determined according to the following formula:

Wherein, I(t end +1) is the first current, and t end +1 is the first temperature;

When the device temperature is greater than the first temperature, adjusting the debugging current to a value of the first current;

When the device temperature is lower than the first temperature, the debugging current is adjusted to a value between the debugging current and the first current according to a weight ratio between the target temperature and the first temperature.
The method according to claim 8, wherein, when the device temperature is less than the target temperature, increasing the debugging current according to the debugging relationship comprises:

The second current corresponding to the second temperature is determined according to the following formula:

Wherein, I(t end -1) is the second current, and t end -1 is the second temperature;

When the device temperature is lower than the second temperature, adjusting the debugging current to a value of the second current;

When the device temperature is greater than the second temperature, the debugging current is adjusted to a value between the debugging current and the second current according to a weight ratio between the target temperature and the second temperature.
A charging control device, comprising:

A determination module, used to determine the thermal balance current corresponding to the device to be charged according to a preset target temperature;

A detection module, used to obtain the device temperature of the device to be charged during the charging process;

The adjustment module is used to adjust the charging current of the device to be charged according to the device temperature, the target temperature and the thermal balance current.
A computer-readable storage medium having a computer program stored therein, wherein the computer program executes the method described in any one of claims 1 to 10 when executed by a processor.
An electronic device comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the method according to any one of claims 1 to 10.