CN115133616A

CN115133616A - Charging control method and device, electronic equipment, readable storage medium and product

Info

Publication number: CN115133616A
Application number: CN202210743717.XA
Authority: CN
Inventors: 谢红斌; 纪策; 田晨; 张加亮
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2022-09-30

Abstract

The application discloses a charging control method, a charging control device, an electronic device, a readable storage medium and a readable storage product, which are applied to a main control module of the electronic device, wherein the electronic device further comprises a charging module and a battery, the charging module is respectively connected with the battery and the main control module, and the method comprises the following steps: detecting the temperature of the battery as a first temperature in the process that the charging module charges the battery by using a first current value; if the first temperature is larger than or equal to the temperature threshold value, controlling the charging module to charge the battery by using a second current value, wherein the second current value is smaller than the first current value; detecting the temperature of the battery as a second temperature in the process that the charging module charges the battery by using a second current value; adjusting a current value for charging the battery based on the second temperature such that the temperature of the battery is not higher than the temperature threshold. The charging temperature rise experience is guaranteed, meanwhile, the charging speed of the battery is improved, and the use experience of a user is improved.

Description

Charging control method and device, electronic equipment, readable storage medium and product

Technical Field

The present application relates to the field of fast charging technologies, and in particular, to a charging control method and apparatus, an electronic device, a readable storage medium, and a readable storage product.

Background

At present, with the rapid development of electronic information technology, people expect that the charging time of electronic equipment is as short as possible. Although, the charging time can be shortened by increasing the current value at the time of charging the electronic device. However, the temperature of the electronic device is too high due to the large charging current value, which affects the user experience.

Disclosure of Invention

The application provides a charging control method, a charging control device, an electronic device, a readable storage medium and a product, so as to overcome the defects.

In a first aspect, an embodiment of the present application provides a charging control method, which is applied to a main control module of an electronic device, where the electronic device further includes a charging module and a battery, the charging module is respectively connected to the battery and the main control module, and the method includes: detecting the temperature of the battery as a first temperature in the process that the charging module charges the battery by a first current value; if the first temperature is greater than or equal to a temperature threshold value, controlling the charging module to charge the battery by using a second current value, wherein the second current value is smaller than the first current value; detecting the temperature of the battery as a second temperature in the process that the charging module charges the battery by using the second current value; adjusting a current value for charging the battery based on the second temperature such that the temperature of the battery is not higher than the temperature threshold.

In a second aspect, a main control module is applied to an electronic device, the electronic device further includes a charging module and a battery, the charging module is respectively connected to the battery and the main control module, and the main control module is configured to execute the method of the first aspect.

In a third aspect, an embodiment of the present application further provides an electronic device, including: the second aspect of the present invention relates to a main control module, a charging module and a battery, wherein the charging module is connected to the battery and the main control module respectively.

In a fourth aspect, the present application also provides a computer-readable storage medium, in which program code executable by a processor is stored, and when executed by the processor, the program code causes the processor to execute the above method.

In a fifth aspect, the present application also provides a computer program product, which includes a computer program/instruction, and when executed by a processor, the computer program/instruction implements the above method.

According to the charging control method, the charging control device, the electronic equipment, the readable storage medium and the product, the charging module uses a first current value as the battery charging process, whether the temperature of the battery is greater than a temperature threshold value is detected, if yes, the charging module is controlled to use a second current value as the battery charging process, wherein the second current value is smaller than the first current value, and the charging module uses the second current value as the battery charging process, the current value of the battery charging process is adjusted based on the second temperature, so that the temperature of the battery is not higher than the temperature threshold value. The embodiment that this application provided is when charging the battery, at first based on great first current value for battery charging, can realize charging with the very fast before the battery temperature reaches the temperature threshold value to improve the charge rate of battery, then charge for the battery based on the second current value, can guarantee that the temperature of battery is not higher than the temperature threshold value, avoid electronic equipment high temperature and influence user's use experience.

Additional features and advantages of embodiments of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of embodiments of the present application. The objectives and other advantages of the embodiments of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 shows a block diagram of an electronic device according to an embodiment of the present application;

fig. 2 shows a method flowchart of a charging control method provided in an embodiment of the present application;

fig. 3 is a graph illustrating internal resistance and state of charge of a battery according to an embodiment of the present disclosure;

fig. 4 is a flowchart illustrating a method of a charging control method according to another embodiment of the present application;

FIG. 5 is a diagram illustrating an embodiment of step S220 in FIG. 4;

FIG. 6 is a diagram illustrating one embodiment of steps S221 and S222 of FIG. 5;

FIG. 7 is a diagram illustrating an embodiment of determining a relationship between a state of charge of the battery and an open circuit voltage of the battery according to an embodiment of the present disclosure;

FIG. 8 is a graph illustrating a remaining capacity and an open circuit voltage provided by an embodiment of the present application;

FIG. 9 is a graph illustrating a depth of discharge and an open circuit voltage provided by an embodiment of the present application;

fig. 10 is a graph illustrating an open circuit voltage versus a state of charge of a battery according to an embodiment of the present disclosure;

FIG. 11 is a flow chart illustrating a method of controlling charging according to another embodiment of the present application;

fig. 12 is a graph illustrating a negative electrode potential value versus a charging time according to an embodiment of the present disclosure;

FIG. 13 is a block diagram illustrating a structure of a computer-readable storage medium provided by an embodiment of the present application;

fig. 14 shows a block diagram of a computer program product provided in an embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

At present, with the rapid development of electronic information technology, people expect that the charging time of electronic equipment is as short as possible. However, one can shorten the charging time by increasing the current value at the time of charging the electronic device. However, the temperature of the electronic device is too high due to the large charging current value, which affects the user experience. How to guarantee faster charging speed, the temperature of the control electronic equipment is not too high to guarantee the use experience of users, and the problem to be solved urgently is formed.

It is readily understood that the charging of the electronic device is essentially the charging of a battery in the electronic device. In the current charging scheme, a Constant Current and Constant Voltage (CCCV) charging mode is generally adopted, i.e., a large constant current is used for constant current charging, and then the constant voltage charging is performed at the end voltage value after the voltage of the battery reaches the end current value, until the charging current reaches the end current, the charging is stopped. When the battery is charged to the end voltage value, the battery is nearly fully charged, so that the charging current with a smaller current value can be adjusted for charging. The end current is a current magnitude at which the battery is charged with the end voltage value when the battery is fully charged, and generally, when the battery is charged with the end voltage value, if the charging current is less than or equal to the end current, the battery is considered to be fully charged. It should be noted that the termination voltage may be the same or different for batteries of different specifications, different materials, or different applications.

However, when charging is performed by a large current value, the current with the large current value generates a large amount of heat through the internal resistance of the battery, so that the temperature of the battery rises rapidly, and therefore, in order to ensure that the temperature of the battery is in a safe range, the battery can be charged with a constant current by using a small current value, but the charging speed is reduced, and the charging time is increased.

Accordingly, in order to overcome or partially overcome the above-mentioned disadvantages, the present application provides a charging control method, apparatus, electronic device, readable storage medium and product.

Referring to fig. 1, fig. 1 illustrates an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 includes a main control module 110, a charging module 120, and a battery 130. The charging module 120 is connected to the battery 130 and the main control module 110, respectively.

For some embodiments, the main control module 110 may be configured to obtain parameter information when the charging module 120 charges the battery 130, for example, parameter information such as a charging current value and a charging voltage value, and the main control module 110 may also obtain state information of the battery 130, for example, may obtain an internal resistance, a negative electrode potential value, a state of charge, and the like of the battery 130. The main control module 110 may also adjust a charging current value for charging the battery 130 through the charging module 120. For example, the main control module 110 may control the charging module 120 to charge the battery 130 at a first current value; the charging module 120 may also be controlled to charge the battery 130 at a second current value. The main control module 110 may also control to adjust a charging current value of the charging module 120 for charging the battery 130 based on the state information of the battery 130. Specifically, the specific functions of the main control module 110 may refer to the following method embodiments.

The main control module 110 may be a processor, and the processor may include one or more processing cores. The main control module 110 is connected to various parts in the whole electronic device 100 by various interfaces and lines, and controls the charging current value of the charging module 120 for charging the battery by controlling the charging module 120. Alternatively, the main control module 110 may be implemented in at least one hardware form of a Micro Control Unit (MCU), a Digital Signal Processing (DSP), a Field-Programmable Gate Array (FPGA), and a Programmable Logic Array (PLA).

The charging module 120 may be used to charge the battery 130. Specifically, the charging module 120 may provide a charging voltage and a charging current to the battery 130, thereby charging the battery 130. The charging module 120 may charge the battery 130 when the user uses the electronic device 100, for example, the user is using the electronic device 100 to make and receive calls, and the charging module 120 may charge the battery 130; charging module 120 may also charge battery 130 when electronic device 100 is not being used by a user, for example, charging module 120 may charge battery 130 when electronic device 100 is in a low power state. The charging module 120 may also be configured to obtain parameter information and send the parameter information to the main control module 110. Further, the charging module 120 may be a module having a wired charging function, and the electronic device 100 may be connected to a charging cable, and the main control module 110 controls the charging module 120 to charge the battery 130; the charging module 120 may also be a module with a wireless charging function, and the electronic device 100 may be placed on a wireless charger, and the main control module 110 controls the charging module 120 to charge the battery 130. For example, the charging module 120 may be an integrated circuit chip having a wired or wireless charging function.

The battery 130 may provide power to the electronic device 100 to enable the electronic device 100 to operate normally. The battery 130 may also obtain a charging voltage and a charging current from the charging module 120, thereby implementing charging. For example, the battery 130 may be a lithium ion battery, such as a lithium terpolymer battery.

It should be noted that the electronic device 100 may be a smart phone, a notebook computer, a smart tablet, or the like.

Referring to fig. 2, fig. 2 shows a charging control method provided in an embodiment of the present application, which can be applied to the main control module 110 in the electronic device 100 in the foregoing embodiment, the electronic device further includes a charging module 120 and a battery 130, wherein the charging module 120 is connected to the battery 130 and the main control module 110, respectively. Specifically, the method includes step S110 and step S140.

Step S110: and detecting the temperature of the battery as a first temperature in the process that the charging module charges the battery by using a first current value.

For some embodiments, the temperature of the battery is generally low when the battery is initially charged, so that the battery can be charged at a first current value with a larger current value, and the battery can be charged at a faster speed before the temperature of the battery reaches the temperature threshold, thereby increasing the charging speed of the battery. For example, the larger first current value may be a maximum charging current value supported by a battery in the electronic device; for another example, the first current value may be a maximum charging current value that is experimentally measured in advance and that is set to satisfy a lifetime requirement of a battery in the electronic device.

It is easily understood that, when the battery is charged, the temperature of the battery increases as the charging progresses. Specifically, the rate of rise in the battery temperature is correlated with the charging current value. The larger the current value at the time of charging, the faster the temperature rise speed of the battery; the smaller the current value at the time of charging, the slower the battery temperature rises. Therefore, in the process of charging the battery by the charging module at the first current value, the temperature of the battery can be detected, the detected temperature of the battery is used as the first temperature, whether the charging of the battery at the first current value needs to be stopped can be judged by judging whether the first temperature exceeds a preset temperature threshold value, and then the charging of the battery is continued at other current values.

For some embodiments, a user may charge a battery of an electronic device when the power of the electronic device is low. Specifically, the battery may be charged at a plurality of different current values, for example, the battery may be charged at a current value of 3A; the battery may be charged at a current value of 5A. Therefore, when charging the battery of the electronic device, the magnitude of the current value for charging the battery may be determined first, that is, the magnitude of the first current value may be determined first.

As can be seen from the above analysis, a large first current value can be set, and the overall charging speed can be improved. However, an excessive charging current value may have an influence on the life of the battery, and may cause a battery failure when severe. Therefore, it is necessary to determine the first current value to be larger on the basis of ensuring the stable operation of the battery. Further, since the magnitude of the charging current is also related to the negative electrode potential of the battery, the larger the charging current value is, the smaller the negative electrode potential of the battery is; the smaller the charge current value, the larger the negative electrode potential of the battery. The negative electrode potential is related to the life and stability of the battery, i.e. the smaller the negative electrode potential of the battery is, the shorter the life of the battery is and the worse the stability is; the greater the negative electrode potential of the battery during charging, the longer the life of the battery and the better the stability. Therefore, the first current value can be determined through the negative electrode potential of the battery, so that the larger first current value is determined on the premise of ensuring that the battery charged by the first current value has better service life and higher stability. Specific determination methods can be described with reference to the following embodiments.

Further, after determining the first current value for charging the battery, the battery may be charged at the first current value. Specifically, the main control module may control the charging module to output a charging current of a first current value to the battery. The first current value may be a constant current value or a variable current value, where the first current value may be determined based on a negative electrode potential value of the battery, or may be adjusted based on the negative electrode potential value after the determination. Specific methods of determining the first current value may be referred to in the following embodiments.

In a process that the charging module charges the battery with a first current value, the temperature of the battery may be detected as a first temperature. Alternatively, the current temperature of the battery may be acquired at intervals as the first temperature. It is easily understood that the first temperature may correspond to a temperature value at a plurality of detections, i.e. the first temperature may comprise a plurality. For example, the first temperature of the battery is detected to be T1 at time T1, T2 at time T2, and T3 at time T3. It should be noted that the temperature of the battery is a detected value, not an actual value of the temperature of the battery, and there may be a certain error between the detected value and the actual value.

For example, a temperature sensing element may be disposed around the battery, the temperature sensing element is used for detecting the temperature of the battery, and the temperature sensing element is connected to the main control module. The main control module can acquire the temperature of the battery detected by the temperature sensing element. For example, the Temperature sensing element may be a Negative Temperature Coefficient (NTC) thermistor or a thermocouple (thermocouple).

Step S120: and if the first temperature is greater than or equal to a temperature threshold value, controlling the charging module to charge the battery by using a second current value, wherein the second current value is smaller than the first current value.

During the charging of the battery, the temperature of the battery may change, and generally, the temperature of the battery may increase. Further, the internal resistance of the battery is affected by the temperature of the battery, and tends to decrease as the temperature increases. The internal resistance of the battery is also affected by the State of Charge (SOC) of the battery, and tends to decrease first and then increase as the SOC increases. Therefore, the battery is charged through the first current with the larger current value in the steps, the battery quickly reaches a preset temperature value, then the charging current value is adjusted, the temperature of the battery is kept near the temperature value, and charging is continued, so that the charging speed can be increased, and meanwhile, the influence of the overhigh temperature of the electronic equipment on the use experience of a user is avoided.

It is understood that, when the battery is charged, if the temperature of the battery is too high, the service life of the battery may be affected, and even a battery failure may be caused, so that the electronic device may not work normally. Therefore, the allowable battery temperature value, that is, the temperature threshold value, can be set in advance so that the life of the battery is not greatly affected when the battery temperature is maintained near the temperature value, and the electronic device can be stably operated. For example, a temperature threshold of 40 ℃ may be set; the temperature threshold value can also be set to 55 ℃, and the specific numerical value of the temperature threshold value is not limited in the embodiment of the application and can be flexibly set according to the requirement.

For some embodiments, after the first temperature is obtained, the magnitude relationship between the first temperature and the temperature threshold may be determined. If the first temperature is smaller than the temperature threshold, it indicates that the battery temperature has not risen to the temperature threshold, and the battery can be continuously charged by the first current value. If the first temperature is greater than or equal to the temperature threshold, it indicates that the battery temperature is greater than or equal to the temperature threshold, and at this time, the charging module may be controlled to charge the battery with a current value less than the first current, so that the battery temperature may be controlled not to rise any more, that is, the charging module may be controlled to charge the battery with the second current value. However, since the battery temperature is positively correlated to the current value of the charging module for charging the battery, it is easy to know that the second current value used may be smaller than the first current value in order to prevent the battery temperature from increasing.

Step S130: and detecting the temperature of the battery as a second temperature in the process that the charging module charges the battery by using the second current value.

For some embodiments, the battery temperature may shift during charging of the battery by the second current value. Specifically, the battery temperature is affected by the charging current and the internal resistance of the battery, which is related to the state of charge (SOC) of the battery. The state of charge of the battery is used to represent the state of the remaining charge in the battery, and is generally expressed as a percentage, for example, the remaining available charge of the battery is a percentage of the total capacity. Referring to fig. 3, fig. 3 shows a graph of the internal resistance of the battery and the state of charge of the battery, wherein the abscissa is the state of charge, the unit is% and the ordinate is the internal resistance of the battery, the unit is Ω, wherein the curve 7 is the relationship between the internal resistance of the battery and the state of charge when the temperature of the battery is 25 ℃, and the curve 8 is the relationship between the internal resistance of the battery and the state of charge when the temperature of the battery is 45 ℃. Therefore, during the charging process of the battery, the state of charge of the battery is increased with time, and at the time, the internal resistance of the battery changes along with the change of the state of charge, the temperature of the battery is further influenced, and the change of the temperature of the battery simultaneously influences the internal resistance of the battery. Even if the same second current value is kept for charging the battery, the temperature of the battery can still change, so that the temperature of the battery can be maintained near a temperature threshold value by detecting the temperature of the battery in the process that the charging module charges the battery by using the second current value, and the size of the second current value can be adjusted according to the temperature, so that the charging speed can be as fast as possible under the condition that the temperature of the battery is not too high, wherein the temperature of the battery in the process that the charging module charges the battery by using the second current value is the second temperature.

The manner of obtaining the second temperature may refer to the manner of obtaining the first temperature, and is not described herein again.

Step S140: adjusting a current value for charging the battery based on the second temperature such that the temperature of the battery is not higher than the temperature threshold.

For some embodiments, after the second temperature is obtained, the current value for charging the battery may be adjusted based on the second temperature so that the temperature of the battery is not higher than the temperature threshold. Specifically, the current value for charging the battery may be adjusted based on a difference between the second temperature and the temperature threshold, and when the second temperature is greater than the temperature threshold, the current value for charging the battery may be decreased, so as to decrease the temperature of the battery; when the second temperature is lower than the temperature threshold, the current value for charging the battery can be increased, so that the charging speed of the battery is increased within the temperature threshold; when the second temperature is equal to the temperature threshold, the current value to charge the battery may not be adjusted.

For example, after the second temperature is obtained, the temperature difference T between the second temperature and the temperature threshold value can be obtained _x At this time, the temperature difference T can be used as the basis _x The current value for charging the battery is adjusted. When temperature difference T _x When greater than 0, the current value to charge the battery may be reduced; when the temperature difference T _x When less than 0, the current value for charging the battery may be increased.

Further, a value m for adjusting the current value for charging the battery may be set, and the value m may be a constant value, for example, 50 mA. Then, after determining the magnitude relationship between the second temperature and the temperature threshold, the current value for charging the battery may be increased by 50mA or decreased by 50mA as a new current value for charging the battery. A weight may be added on the basis of the value, wherein the weight is used for representing the temperature difference value between the second temperature and the temperature threshold value, the larger the temperature difference value is, the larger the deviation of the second temperature from the temperature threshold value is, the larger the weight should be, so as to adjust the current value for charging the battery as soon as possible. For example, the temperature difference may be set as a weight, and the value of the current for charging the battery may be adjusted by the temperature difference x. For example, the temperature difference T between the second temperature and the temperature threshold _x At 1.5 deg.c and a value of m of 50mA, the current value for charging the battery can be reduced to 1.5x 50-75 mA.

It is easily understood that, when the current value for charging the battery is adjusted based on the second temperature for the first time, the current value for charging the battery is the second current value. Further, since some parameters of the battery, such as the internal resistance of the battery or the state of charge of the battery, change during the charging of the battery, the temperature of the battery changes as the charging proceeds even if the battery is charged at the same current. Therefore, optionally, after the current value for charging the battery is adjusted based on the second temperature, the second temperature of the battery may be obtained again in the process of charging the battery with the adjusted current value, and then the current value for charging the battery is adjusted based on the second temperature, so that the temperature of the battery is not higher than the temperature threshold. For example, a second temperature of the battery may be obtained at a specified interval, e.g., 1min, and then the current value for charging the battery may be adjusted based on the second temperature. Therefore, the current value for charging the battery may also be an adjusted current value. The specific adjustment method is similar to that described above, and will not be described herein again.

The setting method of the numerical values and the weights is only for explaining the embodiments of the present application, and is not limited to the present application, and can be flexibly set according to actual requirements.

According to the charging control method, the charging control device, the electronic equipment, the readable storage medium and the product, the charging module uses a first current value as the battery charging process, whether the temperature of the battery is greater than a temperature threshold value is detected, if yes, the charging module is controlled to use a second current value as the battery charging process, wherein the second current value is smaller than the first current value, and the charging module uses the second current value as the battery charging process, the current value of the battery charging process is adjusted based on the second temperature, so that the temperature of the battery is not higher than the temperature threshold value. The embodiment that this application provided can be based on great first current value at first for battery charging when charging the battery, improves the charge speed of battery, then charges for the battery based on the second current value, can guarantee that the temperature of battery is not higher than the temperature threshold, avoids electronic equipment high temperature and influence user's use and experience.

Referring to fig. 4, fig. 4 shows a charging control method provided in an embodiment of the present application, which can be applied to the main control module 110 in the electronic device 100 in the foregoing embodiment, the electronic device further includes a charging module 120 and a battery 130, wherein the charging module 120 is connected to the battery 130 and the main control module 110, respectively. Specifically, the method includes step S210 and step S260.

Step S210: and detecting the temperature of the battery as a first temperature in the process that the charging module charges the battery by using a first current value.

Step S210 is described in detail in the foregoing embodiments, and is not described herein again.

Step S220: and if the first temperature is greater than or equal to the temperature threshold, acquiring the internal resistance of the battery at the first temperature and the heat dissipation power of the battery.

Step S230: and determining a second current value according to the internal resistance and the heat dissipation power.

Step S240: and controlling the charging module to charge the battery by using the second current value.

For some embodiments, it is known from the foregoing examples that battery temperature is related to battery internal resistance. Furthermore, the battery can generate heat convection with the environment, namely, the heat of the battery can be transferred to the air through the heat transfer of the air in the environment, so that the temperature of the battery is reduced. Specifically, the degree of temperature drop of the battery in unit time can be measured by the heat dissipation power of the battery, that is, the higher the heat dissipation power is, the higher the degree of temperature drop of the battery in unit time is; the lower the heat dissipation power, the lower the degree of decrease in the battery temperature per unit time. Therefore, it can be easily known that, in the case where the heat dissipation power is high, when the batteries having the same internal resistance of the batteries are charged with the same current value, a lower battery temperature can be obtained; and under the condition of lower heat dissipation power, when the batteries with the same battery internal resistance are charged by using the same current value, higher battery temperature can be obtained. Therefore, further, the internal resistance of the battery at the first temperature and the heat dissipation power of the battery may be obtained, and then the second current value may be determined according to the internal resistance and the heat dissipation power. The first current value is larger, the battery temperature will be increased faster through the first current value, and the second current value is used for keeping the battery temperature at the temperature threshold value, so it is not difficult to know that the second current value should be smaller than the first current value.

Because the first current value is relatively large, when the temperature of the battery is greater than or equal to the temperature threshold value, if the battery is charged based on the first current value, the first current value is gradually reduced, so that the temperature of the battery is equal to the temperature threshold value, the temperature of the battery may be far away from the temperature threshold value, and then the temperature of the battery is slowly restored to the temperature threshold value, so that the temperature rise experience during charging is reduced. The temperature of the battery charged based on the second current value can not deviate from the threshold current greatly, namely can be kept near the temperature threshold, and therefore temperature rise experience during charging is improved.

Specifically, since the first temperature is greater than or equal to the temperature threshold, the second current value may be determined, so that the rate of heat generated by the battery is equivalent to the heat dissipation power in the process of charging the battery by the charging module through the second current value. For example, if the heat dissipation power is P, the second current value is I, and the internal resistance of the battery is R, the formula P is I ² R, a second current value corresponding to this time may be obtained, that is, a square root of a ratio of the heat dissipation power to the internal resistance may be taken as the second current value.

For other embodiments, a plurality of second current values corresponding to a plurality of temperature thresholds may be obtained multiple times based on the above method for obtaining the second current values, and then the second current value corresponding to each temperature threshold may be determined based on algorithmic analysis. For example, the algorithm may be an algorithm based on an artificial intelligence algorithm. The second current value with larger error in the plurality of second current values corresponding to the temperature threshold can be removed through an algorithm, and then the more accurate second current value is determined based on the remaining second current values. For example, the plurality of second current values obtained for the temperature threshold value of 40 ℃ for a plurality of times include 10A, 10.5A, 5A, and 10.3A. Based on the artificial intelligence algorithm, it can be known that 5A is significantly lower than the remaining second current value, so that 5A is removed, and then a more accurate second current value is determined based on the remaining 10A, 10.5A, and 10.3A, for example, an arithmetic average value of 10A, 10.5A, and 10.3A can be used as the more accurate second current value; the minimum value among 10A, 10.5A, and 10.3A may be set as the second current value.

Further, each temperature threshold value and a second current value corresponding to the temperature threshold value may be stored, and when the second current value needs to be determined, a temperature threshold value closest to the first temperature may be determined based on a plurality of temperature threshold values stored in advance and the second current value corresponding to the temperature threshold value, and then the corresponding second current value may be determined based on the closest temperature threshold value. For example, the plurality of temperature thresholds obtained in advance and the second current value corresponding to the temperature threshold may be stored in a storage unit of the electronic device in the form of a lookup table, for example, a flash memory of the electronic device, and when the second current value needs to be determined, the lookup table is directly obtained from the storage unit of the electronic device. Therefore, the second current value can be directly and simply obtained without calculation by electronic equipment, and the efficiency of obtaining the second current value is improved.

Specifically, for some embodiments, when the first temperature is greater than or equal to the temperature threshold, the temperature Ta of the battery at the time Ta may be obtained, at which time the charging of the battery is stopped, and after waiting for a certain time interval, the temperature Tb of the battery is obtained at the time Tb. In this case, the heat dissipation power P of the battery can be obtained from the formula P ═ Cm (Tb-Ta)/(Tb-Ta). Wherein C is the specific heat capacity by weight of the battery, and m is the weight of the battery.

Since the heat dissipation power of the battery describes a heat dissipation capability of the battery, the current battery temperature has little influence on the heat dissipation power of the battery. Therefore, for other embodiments, the heat dissipation power of the battery may be obtained in advance, the obtained heat dissipation power may be stored, and the heat dissipation power may be directly obtained when the battery needs to be used. For example, the heat dissipation power obtained in advance may be stored in a storage unit of the electronic device, for example, a flash memory of the electronic device, and when the use is required, the heat dissipation power is directly obtained from the storage unit of the electronic device. The method for obtaining the heat dissipation power of the battery in advance may be similar to the above method, and will not be described herein again.

It will be readily appreciated that the power dissipated by a battery is related to the ambient temperature, and in particular, the lower the ambient temperature, the greater the degree to which the temperature decreases over the same time interval for the same battery. Therefore, for other embodiments, multiple heat dissipation powers corresponding to multiple environmental temperatures may be obtained in advance and stored, and when the heat dissipation power needs to be used, the current environmental temperature may be obtained first, and then the heat dissipation power corresponding to the current environmental temperature is obtained based on the current environmental temperature, where a storage manner is similar to that described in the foregoing embodiment, and is not described here again. For example, the heat dissipation power P1 corresponding to an ambient temperature of 5 ℃, the heat dissipation power P2 corresponding to an ambient temperature of 15 ℃, the heat dissipation power P3 corresponding to an ambient temperature of 25 ℃, and the heat dissipation power P4 corresponding to an ambient temperature of 35 ℃ may be obtained. And storing each heat dissipation power and the environment temperature corresponding to the heat dissipation power. When the second current value is determined according to the internal resistance and the heat dissipation power, the current ambient temperature of the battery can be obtained first, and then the corresponding heat dissipation power is determined according to the current ambient temperature. Specifically, the ambient temperature closest to the current ambient temperature may be determined from a plurality of pre-stored ambient temperatures, and then the heat dissipation power corresponding to the closest ambient temperature may be determined. The specific method for determining the heat dissipation power corresponding to different environmental temperatures is similar to the above method, and is not described here again.

Optionally, the internal resistance of the battery may be obtained according to the charging voltage value of the charging module, the open-circuit voltage of the battery, and the first current value, and a specific determination method may refer to fig. 5, where fig. 5 shows a specific implementation manner of step S220, and fig. 5 includes step S221 and step S222.

Step S221: if the first temperature is greater than or equal to a temperature threshold, acquiring a charging voltage value of the charging module and a current open-circuit voltage of the battery, wherein the current open-circuit voltage is determined based on the current state of charge of the battery.

Step S222: and acquiring the internal resistance of the battery based on the charging voltage value of the charging module, the current open-circuit voltage of the battery and the first current value.

For some embodiments, as known from ohm's theorem, the internal resistance of the battery can be determined by the ratio of the current voltage value to the current value applied to the internal resistance of the battery. Therefore, in order to obtain the internal resistance of the battery, the voltage value and the current value acting on the internal resistance of the battery can be obtained firstly. The voltage value of the battery internal resistance may be a difference between a charging voltage value output by the current charging module and a current open-circuit voltage of the battery, where the current open-circuit voltage of the battery is a potential difference between the positive electrode and the negative electrode of the battery. For example, the open circuit voltage of the lithium battery may be about 4.1-4.2V when the battery is full, and the open circuit voltage may be about 3.0V when the battery is low. And when the first temperature is greater than or equal to the temperature threshold value, the current value acting on the internal resistance of the battery is the current value for charging the battery through the charging module, namely the first current value.

After the charging voltage value of the charging module, the current open-circuit voltage of the battery and the first current value are obtained, the internal resistance of the battery can be determined. Specifically, referring to fig. 6, fig. 6 is a diagram illustrating an embodiment of steps S221 and S222, wherein steps S223 to S225 in fig. 6 are an embodiment of step S221; step S226 and step S227 are an embodiment of step S222.

Step S223: and if the first temperature is greater than or equal to the temperature threshold value, acquiring a charging voltage value of the charging module.

Step S224: and acquiring the current state of charge of the battery.

Step S225: and determining the current open-circuit voltage of the battery corresponding to the current state of charge of the battery based on the relationship between the predetermined state of charge of the battery and the open-circuit voltage of the battery.

For some embodiments, when the first temperature is greater than or equal to the temperature threshold, a charging voltage value of the charging module may be obtained, the charging voltage value being a voltage value output by the charging module and applied to the battery. For example, the charging module may report the output charging voltage value to the main control module, so that the main control module may obtain the charging voltage value of the current charging module. For another example, the charging voltage value of the charging module may be further obtained by setting a sampling module and obtaining a parameter value of the sampling module. For example, the sampling module may be a sampling resistor, the parameter value may be a sampling voltage value, and the charging voltage value of the charging module may be calculated by obtaining the sampling voltage value of the sampling resistor.

Further, since the open circuit voltage of the battery is related to the state of charge of the battery, generally, the larger the state of charge of the battery, the larger the open circuit voltage of the battery; the smaller the state of charge of the battery, the smaller the open circuit voltage of the battery. Therefore, in order to obtain the current open-circuit voltage of the battery, the current state of charge of the battery may be obtained first, and then the current open-circuit voltage of the battery corresponding to the current state of charge of the battery may be determined based on the predetermined relationship between the state of charge of the battery and the open-circuit voltage of the battery.

For example, the main control module may directly obtain the current state of charge of the battery, for example, the main control module sends a request for obtaining the current state of charge to the battery, and the battery sends the current state of charge to the main control module based on the request for obtaining the current state of charge. And then determining the current open-circuit voltage of the battery based on the acquired current state of charge. For some embodiments, if the predetermined relationship between the state of charge of the battery and the open-circuit voltage of the battery includes a coordinate relationship between the state of charge and the open-circuit voltage of the battery, the obtained current state of charge may be substituted into the coordinate relationship, so as to determine the current open-circuit voltage. For other embodiments, if the predetermined relationship between the state of charge of the battery and the open-circuit voltage of the battery includes a functional relationship between the state of charge and the open-circuit voltage of the battery, the obtained current state of charge may be substituted into the functional relationship, so as to determine the current open-circuit voltage.

Referring to fig. 7, fig. 7 is a diagram illustrating an embodiment of determining a relationship between a state of charge of the battery and an open circuit voltage of the battery, and in particular, fig. 7 includes steps S2251 to S2253.

Step S2251: determining a depth of discharge of the battery corresponding to each of the remaining capacities based on the remaining capacity of the battery and a maximum capacity of the battery.

Step S2252: and acquiring the charge state corresponding to each discharge depth based on each discharge depth.

Step S2253: determining a relationship between a state of charge of the battery and an open circuit voltage of the battery based on a predetermined relationship between a remaining capacity of the battery and the open circuit voltage of the battery.

For some embodiments, the state of charge of the battery and the remaining capacity of the battery are correlated because the state of charge of the battery is used to characterize how much of the remaining capacity of the battery. The remaining capacity of the battery may be the total capacity of the battery after being fully charged, and after a certain period of use, a part of the capacity is consumed, and the rest of the capacity is left. The remaining capacity of the battery may be in units of milliampere hours mAh.

Further, the depth of discharge of the battery can also be determined by the remaining capacity of the battery, and therefore the relationship between the open-circuit voltage and the depth of discharge can be used as an intermediate variable relationship for determining the relationship between the open-circuit voltage and the state of charge of the battery by the relationship between the open-circuit voltage and the remaining capacity of the battery. The discharge depth of the battery can be used to represent a percentage of a used capacity of the battery to a maximum capacity of the battery, and the used capacity of the battery can be a part of a capacity consumed by the battery during operation, for example, the battery has a total capacity of 5000mAh after being fully charged, and after being used for a certain time, the remaining capacity is 4000mAh, where the used capacity is a difference between the total capacity and the remaining capacity of 1000 mAh. For example, the maximum capacity of the battery may be a design capacity of the battery, or may be a total capacity calculated when the battery is fully charged, and is not limited herein.

The open circuit voltage of the battery corresponding to the remaining battery capacity may be first determined. Specifically, there may be a plurality of remaining capacities of the battery, and an open-circuit voltage corresponding to each remaining capacity may be obtained. For example, a fully charged battery may be discharged through a smaller current value, and then the current remaining capacity and the open-circuit voltage may be obtained at regular intervals, that is, multiple sets of remaining capacities and corresponding open-circuit voltages may be obtained. For example, the total capacity of the fully charged battery is 5000mAh, and when the fully charged battery starts to be discharged, the current residual capacity is 5000mAh and the open-circuit voltage is 4.4V; then, the current remaining capacity and the open-circuit voltage are obtained once at intervals of time t until the remaining capacity is 0mAh, the open-circuit voltage is 3.0V, and then the relationship between the remaining capacity of the battery and the open-circuit voltage of the battery can be obtained based on the obtained multiple groups of remaining capacities and open-circuit voltages. For example, the remaining capacity and the open-circuit voltage may be fitted to generate a coordinate curve of the remaining capacity and the open-circuit voltage, where the fitting method may include least squares curve fitting, polynomial curve fitting, custom function fitting, and the like. Specifically, referring to fig. 8, fig. 8 shows a graph of a fitted residual capacity and open circuit voltage. Where the abscissa is the remaining capacity in mAh, and the ordinate is the open circuit voltage of the battery in V. It can be seen that the open circuit voltage of the battery gradually decreases as the remaining capacity decreases.

Further, based on the obtained plurality of residual capacities, a discharge depth corresponding to each residual capacity may also be determined. Specifically, the used capacity corresponding to each remaining capacity may be obtained first, and then the depth of discharge of the battery may be obtained based on the used capacity, that is, the depth of discharge of the battery corresponding to each remaining capacity. Specifically, the ratio of the used capacity to the maximum capacity of the battery may be used as the depth of discharge corresponding to the used capacity. For example, when the maximum capacity of the battery is the total capacity calculated when the battery is fully charged, based on the above example in which the total capacity after the battery is fully charged is 5000mAh, the used capacity of the battery when the battery is fully charged is 0mAh, and then the current depth of discharge of the battery is 0/5000 — 0%; the used capacity of the battery is 5000mAh when the residual capacity of the battery is 0mAh, and the current discharge depth of the battery is 5000/5000-100%. Further, after the discharge depth of the battery corresponding to each remaining capacity is obtained, the relationship between the discharge depth and the open-circuit voltage can be obtained based on the determined relationship between the remaining capacity and the open-circuit voltage. Specifically, the open-circuit voltage and the depth of discharge may be fitted to obtain a relationship curve between the open-circuit voltage and the depth of discharge, where the specific method for fitting may refer to the method for fitting the residual capacity and the open-circuit voltage, and details thereof are not repeated here. Referring to fig. 9, fig. 9 shows a graph of a depth of discharge and open circuit voltage fit. Wherein the abscissa is depth of discharge in%, and the ordinate is open circuit voltage of the battery in V. It can be seen that the open circuit voltage of the battery gradually decreases as the depth of discharge increases.

Therefore, determining the relationship between the state of charge of the battery and the open circuit voltage of the battery based on the predetermined relationship between the remaining capacity of the battery and the open circuit voltage of the battery may include first determining the relationship between the depth of discharge of the battery and the open circuit voltage of the battery from the relationship between the remaining capacity of the battery and the open circuit voltage of the battery; and determining the relation between the state of charge of the battery and the open-circuit voltage of the battery based on the relation between the discharge depth of the battery and the open-circuit voltage of the battery. Therefore, it is necessary to obtain the relationship between the state of charge and the depth of discharge. The state of charge can be used for representing the ratio of the remaining capacity of the battery to the total capacity of the battery, the depth of discharge can be used for representing the ratio of the used capacity of the battery to the total capacity of the battery, and the sum of the remaining capacity of the battery and the used capacity of the battery is the total capacity of the battery. Therefore, it is known that the sum of the state of charge and the depth of discharge of the battery is 1. Therefore, on the basis of the relationship between the depth of discharge of the battery and the open circuit voltage of the battery, the relationship between the state of charge of the battery and the open circuit voltage of the battery can be determined by the relationship that the sum of the state of charge and the depth of discharge is 1. Specifically, referring to fig. 10, fig. 10 shows a graph of the open-circuit voltage and the state of charge of the battery. Wherein the abscissa is the state of charge in%, and the ordinate is the open circuit voltage of the battery in V. It can be seen that the open circuit voltage of the battery gradually becomes larger as the state of charge increases.

Further, after the current state of charge of the battery is obtained, the current state of charge may be substituted into the relationship between the state of charge and the open-circuit voltage of the battery, so as to obtain the current open-circuit voltage of the battery corresponding to the current state of charge.

Step S226: and taking the difference value of the charging voltage value of the charging module and the current open-circuit voltage of the battery as a voltage difference value.

Step S227: and taking the ratio of the voltage difference value to the first current value as the current internal resistance of the battery.

For some embodiments, the obtaining of the internal resistance of the battery based on the charging voltage value of the charging module, the current open-circuit voltage of the battery, and the first current value may include first obtaining a difference value between the charging voltage value of the charging module and the current open-circuit voltage of the battery, and taking the difference value as a voltage difference value. For example, if the charging voltage value of the charging module is X and the current open-circuit voltage of the battery is Y, X-Y may be used as the voltage difference value corresponding to the internal resistance of the battery.

Further, when the current flowing through the internal resistance of the battery is the first current value, the internal resistance of the battery can be a ratio of the voltage difference value to the first current value according to ohm's law of the circuit. For example, if the first current value is I, the internal resistance of the battery may be expressed as (X-Y)/I.

Step S250: and detecting the temperature of the battery as a second temperature in the process that the charging module charges the battery by using the second current value.

Step S260: adjusting a current value for charging the battery based on the second temperature such that the temperature of the battery is not higher than the temperature threshold.

Step S250 and step S260 have already been described in detail in the foregoing embodiments, and are not described herein again.

According to the charging control method, the charging control device, the electronic equipment, the readable storage medium and the product, the charging module uses a first current value as the battery charging process, whether the temperature of the battery is larger than a temperature threshold value is detected, if yes, the charging module is controlled to use a second current value as the battery charging process, the second current value is determined through the internal resistance and the heat dissipation power, and the charging module uses the second current value as the battery charging process, the current value of the battery charging process is adjusted based on the second temperature, so that the temperature of the battery is not higher than the temperature threshold value. According to the embodiment of the application, the second current value is determined through the internal resistance and the heat dissipation power, so that when the battery is charged through the second current value, the temperature of the battery cannot deviate greatly from the temperature threshold value, and the influence of the overhigh temperature of the electronic equipment on the use experience of a user is avoided.

Referring to fig. 11, fig. 11 shows a charging control method provided in this embodiment, which may be applied to the main control module 110 in the electronic device 100 in the foregoing embodiment, and the electronic device further includes a charging module 120 and a battery 130, where the charging module 120 is connected to the battery 130 and the main control module 110 respectively. Specifically, the method includes step S310 and step S370.

Step S310: and acquiring a preset target negative electrode potential value of the battery.

Step S320: and determining a target current value corresponding to the target negative electrode potential value based on a pre-acquired negative electrode potential charging current comparison table.

Step S330: the target current value is taken as the first current value.

For some embodiments, the temperature of the battery is generally low when the battery is initially charged, so that the battery can be charged at this time by a first current value of a larger current value to increase the overall charging speed. However, if the charging current value is too large, the battery may be damaged, for example, the battery may have a lithium precipitation reaction.

Further, as understood from the foregoing embodiment, the charging current value is related to the negative electrode potential value of the battery, and thus the first current value may be determined based on the negative electrode potential of the battery. Specifically, a preset target negative potential value of the battery may be obtained, where the target negative potential value is a negative potential value of the battery when the battery is charged by the first current. It is easy to know that the smaller the negative electrode potential value, i.e. the smaller the negative electrode potential value representing the battery when charged by the first current, i.e. the larger the first current value, the faster the charging speed can be obtained, but the larger the effect on the lifetime of the battery.

For example, the target negative electrode potential value during charging may be set in advance, for example, the target negative electrode potential value is set to 10 mV; alternatively, the user may select the target cathode potential value through an application program running on the electronic device during charging, for example, the target cathode potential value may be selected to be 0mV or-5 mV.

Further, after the target negative electrode potential value is obtained, a target current value corresponding to the target negative electrode potential value may be determined based on a negative electrode potential charging current comparison table obtained in advance. The negative electrode potential charging current comparison table may include a plurality of negative electrode potential values and a charging current value corresponding to each negative electrode potential value. Specifically, when the battery is charged by measuring different charging current values in advance, the negative electrode potential value of the battery is measured, and each group of negative electrode potential values and the corresponding charging current value are arranged into a negative electrode potential charging current comparison table. For example, the negative electrode potential charging current map may include a negative electrode potential value of 10mV for a charging current of 5A; the potential value of the negative electrode is 5mV corresponding to the charging current of 5.5A; the potential value of the negative electrode is 0mV corresponding to the charging current 6A; the potential value of the negative electrode is-5 mV corresponding to the charging current of 6.5A; negative electrode potential-10 mV corresponds to a charging current of 7A. The method for determining the target current value corresponding to the target negative electrode potential value based on the pre-obtained negative electrode potential charging current comparison table may be to find the negative electrode potential value closest to the target negative electrode potential value from the negative electrode potential charging current comparison table, and use the charging current corresponding to the negative electrode potential value as the target current value. The negative electrode potential charging current map shown above is merely an example, and is not intended to limit the embodiments of the present application.

Further, for some embodiments, the target current value may be taken as the first current value. For other embodiments, the first current value may be set after the specified current value is reduced based on the target current value, so as to improve the service life and stability of the battery during charging. For example, if the target current value is 5A and the specified current value may be 100mA, 5-0.1 or 4.9A may be set as the first current value.

Step S340: and detecting the temperature of the battery as a first temperature in the process that the charging module charges the battery by using a first current value.

For some embodiments, after the first current value is determined through the above steps, the battery may be charged at the first current value through a charging module.

Optionally, in a process of charging the battery with the first current value, a current negative electrode potential value of the battery may be detected, and if the current negative electrode potential value deviates from a set target negative electrode potential value, the first current value may be adjusted to reduce the deviation. Specifically, if the current negative electrode potential value is smaller than the set target negative electrode potential value, the first current value can be reduced, and the battery is charged through the reduced first current value, so that the service life and the stability of the battery are improved; if the current negative electrode potential value is larger than the set target negative electrode potential value, the first current value can be increased, and the battery is charged through the increased first current value, so that the charging speed of the battery is increased; if the current cathode potential value is equal to the set target cathode potential value, the first current value may not be changed.

For example, the value of the first current value increasing or decreasing may be a constant value, such as the value n. For example, if n is 50mA, the first current value 50mA may be decreased when detecting that the current cathode potential value is smaller than the set target cathode potential value; if the current negative electrode potential value is larger than the set target negative electrode potential value, the first current value 50mA can be increased.

For another example, the value of the first current increase or decrease may also be determined based on a deviation of the present negative electrode potential value from a set target negative electrode potential value. For example, the value may be the sum of the deviation value and the constant value n. For example, if n is 50mA and the difference between the current negative electrode potential value and the set target negative electrode potential value is-5 mV, the sum of the values of 50mA and-5 mV can be obtained, that is, 45mA is used as the first current value after the current value is reduced; if the difference between the current negative electrode potential value and the set target negative electrode potential value is 5mV, the sum of the values of 50mA and 5mV, that is, 55mA may be determined as the first increased current value. Therefore, under the condition that the deviation between the current negative electrode potential value and the set target negative electrode potential value is larger, the first current value is adjusted through a larger variable, and the deviation between the current negative electrode potential value and the set target negative electrode potential value is reduced as soon as possible.

Referring to fig. 12, fig. 12 is a graph of negative electrode potential versus charge time, wherein the abscissa is charge time in min and the ordinate is negative electrode potential in mV. It can be seen that the negative electrode potential value is large at the start of charging, and the negative electrode potential value shows a steep drop as the charging time becomes longer, and then the negative electrode potential value is maintained around the target negative electrode potential value by adjusting the first current value. When the voltage reaches the point a in fig. 12, the battery is charged by the second current value, the positive electrode potential of the battery increases, and the negative electrode potential also tends to increase.

For some embodiments, the current negative electrode potential value may be obtained by setting a reference electrode (reference electrode). The reference electrode can be regarded as a reference electrode with a known potential value, and the potential value of the electrode to be measured can be determined by acquiring the potential difference between the electrode to be measured and the reference electrode. For example, the electrode to be measured may be the current negative electrode potential value, if the potential value of the reference electrode is 0mV, and the obtained potential difference between the current negative electrode potential value and the reference electrode is 5mV, it may be determined that the current negative electrode potential value is 5mV-0 mV-5 mV.

Optionally, during the process of charging the battery, whether the battery separates lithium may be detected, and if the battery separates lithium, the negative electrode potential representing the battery is already low, which may cause damage to the battery, and at this time, the charging of the battery may be stopped. The step of lithium precipitation is that after the potential value of the negative electrode of the battery is reduced to a specified value, a lithium metal simple substance begins to precipitate, and the specified value can be a smaller value. For example, it can be determined whether to analyze lithium by acquiring the change of the charged capacity under the unit voltage, for example, if the unit voltage is V and the capacity is Q, it can be determined whether to decrease dQ/dV, and if so, lithium analysis may occur. For another example, the difference between the solid-phase potential and the liquid-phase potential on the surface of the negative electrode of the battery can be used as a boundary condition of the lithium evolution reaction by establishing a battery model in advance, that is, when the potential value of the negative electrode reaches the boundary condition, the lithium evolution may occur. The method for determining whether or not to deposit lithium in the battery is described above only for illustration, and is not limited to the embodiment of the present application, and can be flexibly set as needed.

Step S350: and if the first temperature is greater than or equal to a temperature threshold value, controlling the charging module to charge the battery by using a second current value, wherein the second current value is smaller than the first current value.

Step S360: and detecting the temperature of the battery as a second temperature in the process that the charging module charges the battery by using the second current value.

Step S370: adjusting a current value to charge the battery based on the second temperature such that the temperature of the battery is not higher than the temperature threshold.

For example, if the battery has a capacity of 5000mAh when fully charged, the battery has a weight m of 60g, and the target negative electrode potential value is set to-5 mV, a first current value may be determined based on phi at which the battery is charged. If the temperature threshold is set to 40 ℃, when the first temperature is detected to be greater than or equal to 40 ℃ in the process of charging the battery by using the first current value, the current state of charge is 30% and the current internal resistance is 50m Ω, if the ambient temperature is 25 ℃, the specific heat capacity of the battery is 1J/g.DELTA.t, the temperature of the battery is reduced by 0.3 ℃ after the charging is stopped for 10s, and the current heat dissipation power is calculated to be 1J/g.DELTA.t 60g 0.3 ℃/10s 1.8W, then the second current value of 40 ℃ is required to be maintained as I (1.8/0.05) ^1/ 2＝6A。

According to the charging control method, the charging control device, the electronic equipment, the readable storage medium and the product, the first current value can be determined based on the target negative electrode potential value, the charging module can charge the battery through the first current value, and the current negative electrode potential value can be kept near the target negative electrode potential value when the battery is charged at the first current value, so that the service life and the stability of the battery are prolonged, and the charging safety is ensured.

Referring to fig. 1, a main control module 110 provided in an embodiment of the present application is shown, where the main control module 110 is applied to an electronic device 100, the electronic device 100 further includes a charging module 120 and a battery 130, and the charging module 120 is connected to the battery 130 and the main control module 110 respectively. Alternatively, the main control module 110 may be implemented in the form of at least one hardware of a micro control unit MCU, a digital signal processing DSP, a field programmable gate array FPGA, and a programmable logic array PLA.

The main control module 110 is configured to detect a temperature of the battery as a first temperature in a process that the charging module charges the battery with a first current value; if the first temperature is larger than or equal to a temperature threshold value, controlling the charging module to charge the battery by a second current value, wherein the second current value is smaller than the first current value; detecting the temperature of the battery as a second temperature in the process that the charging module charges the battery by the second current value; adjusting a current value for charging the battery based on the second temperature such that the temperature of the battery is not higher than the temperature threshold.

Further, the main control module 110 is further configured to, if the first temperature is greater than or equal to a temperature threshold, obtain an internal resistance of the battery at the first temperature and a heat dissipation power of the battery; determining a second current value according to the internal resistance and the heat dissipation power; and controlling the charging module to charge the battery by using the second current value.

Further, the main control module 110 is further configured to use a square root of a ratio of the heat dissipation power to the internal resistance as the second current value.

Further, the main control module 110 is further configured to, if the first temperature is greater than or equal to a temperature threshold, obtain a charging voltage value of the charging module and a current open-circuit voltage of the battery, where the current open-circuit voltage is determined based on the current state of charge of the battery; and acquiring the internal resistance of the battery based on the charging voltage value of the charging module, the current open-circuit voltage of the battery and the first current value.

Further, the main control module 110 is further configured to use a difference between the charging voltage value of the charging module and the current open-circuit voltage of the battery as a voltage difference; and taking the ratio of the voltage difference value to the first current value as the current internal resistance of the battery.

Further, the main control module 110 is further configured to obtain a charging voltage value of the charging module if the first temperature is greater than or equal to a temperature threshold; acquiring the current state of charge of the battery; and determining the current open-circuit voltage of the battery corresponding to the current state of charge of the battery based on the relationship between the predetermined state of charge of the battery and the open-circuit voltage of the battery.

Further, the main control module 110 is further configured to determine a discharge depth of the battery corresponding to each remaining capacity based on the remaining capacity of the battery and the maximum capacity of the battery; acquiring the state of charge corresponding to each depth of discharge based on each depth of discharge; determining a relationship between a state of charge of the battery and an open circuit voltage of the battery based on a predetermined relationship between a remaining capacity of the battery and the open circuit voltage of the battery.

Further, the main control module 110 is further configured to obtain a preset target negative electrode potential value of the battery; determining a target current value corresponding to the target negative electrode potential value based on a pre-obtained negative electrode potential charging current comparison table; the target current value is taken as the first current value.

It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working process of the main control module 110 described above may refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

Referring to fig. 13, a block diagram of a computer-readable storage medium according to an embodiment of the present application is shown. The computer-readable medium 1300 has stored therein program code that can be called by a processor to execute the method described in the above-described method embodiments.

The computer-readable storage medium 1300 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. Optionally, the computer-readable storage medium 1300 includes a non-volatile computer-readable storage medium. The computer readable storage medium 1300 has storage space for program code 1310 for performing any of the method steps of the method described above. The program code can be read from and written to one or more computer program products. The program code 1310 may be compressed, for example, in a suitable form.

Referring to fig. 14, a block diagram of a computer program product 1400 according to an embodiment of the present application is shown. Included in the computer program product 1400 is a computer program/instructions 1410, which computer program/instructions 1410, when executed by a processor, implement the steps of the method described above.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A charging control method is applied to a main control module of an electronic device, the electronic device further comprises a charging module and a battery, the charging module is respectively connected with the battery and the main control module, and the method comprises the following steps:

detecting the temperature of the battery as a first temperature in the process that the charging module charges the battery by a first current value;

if the first temperature is greater than or equal to a temperature threshold value, controlling the charging module to charge the battery by using a second current value, wherein the second current value is smaller than the first current value;

detecting the temperature of the battery as a second temperature in the process that the charging module charges the battery by the second current value;

adjusting a current value to charge the battery based on the second temperature such that the temperature of the battery is not higher than the temperature threshold.

2. The method of claim 1, wherein the controlling the charging module to charge the battery at a second current value if the first temperature is greater than or equal to a temperature threshold comprises:

if the first temperature is greater than or equal to a temperature threshold value, acquiring the internal resistance of the battery at the first temperature and the heat dissipation power of the battery;

determining a second current value according to the internal resistance and the heat dissipation power;

and controlling the charging module to charge the battery by using the second current value.

3. The method of claim 2, wherein determining a second current value based on the internal resistance and a heat dissipation power comprises:

and taking the square root of the ratio of the heat dissipation power to the internal resistance as the second current value.

4. The method of claim 2, wherein the obtaining the internal resistance of the battery at the first temperature and the heat dissipation power of the battery if the first temperature is greater than or equal to a temperature threshold comprises:

if the first temperature is greater than or equal to a temperature threshold, acquiring a charging voltage value of the charging module and a current open-circuit voltage of the battery, wherein the current open-circuit voltage is determined based on a current state of charge of the battery;

and acquiring the internal resistance of the battery based on the charging voltage value of the charging module, the current open-circuit voltage of the battery and the first current value.

5. The method of claim 4, wherein obtaining the internal resistance of the battery based on the charging voltage value of the charging module, the open-circuit voltage of the battery, and the first current value comprises:

taking the difference value between the charging voltage value of the charging module and the current open-circuit voltage of the battery as a voltage difference value;

and taking the ratio of the voltage difference value to the first current value as the current internal resistance of the battery.

6. The method of claim 4, wherein the obtaining the charging voltage value of the charging module and the current open-circuit voltage of the battery if the first temperature is greater than or equal to a temperature threshold comprises:

if the first temperature is greater than or equal to a temperature threshold, acquiring a charging voltage value of the charging module;

acquiring the current state of charge of the battery;

and determining the current open-circuit voltage of the battery corresponding to the current state of charge of the battery based on the relationship between the predetermined state of charge of the battery and the open-circuit voltage of the battery.

7. The method of claim 6, wherein said determining said current open circuit voltage corresponding to said current state of charge based on a predetermined relationship between said state of charge and said open circuit voltage further comprises:

determining a depth of discharge of the battery corresponding to each of the remaining capacities based on the remaining capacity of the battery and a maximum capacity of the battery;

acquiring the state of charge corresponding to each depth of discharge based on each depth of discharge;

determining a relationship between a state of charge of the battery and an open circuit voltage of the battery based on a predetermined relationship between a remaining capacity of the battery and the open circuit voltage of the battery.

8. The method of claim 1, wherein before detecting the temperature of the battery as the first temperature during the charging of the battery by the charging module at the first current value, the method further comprises:

acquiring a preset target negative electrode potential value of the battery;

determining a target current value corresponding to the target negative electrode potential value based on a pre-obtained negative electrode potential charging current comparison table;

the target current value is taken as the first current value.

9. A main control module applied to an electronic device, wherein the electronic device further includes a charging module and a battery, the charging module is respectively connected to the battery and the main control module, and the main control module is configured to perform the method according to any one of claims 1 to 8.

10. An electronic device, comprising: the host module, charging module and battery of claim 9, the charging module being connected to the battery and the host module, respectively.

11. A computer-readable storage medium, having stored thereon program code that can be invoked by a processor to perform the method according to any one of claims 1 to 8.

12. A computer program product comprising computer programs/instructions which, when executed by a processor, implement the method of any one of claims 1 to 8.