Battery charging control method and device, electronic equipment and storage medium

Abstract

The application provides a battery charging control method and device, electronic equipment and a storage medium. The method comprises the following steps: determining a first charging rate of a battery according to a first correlation between a negative plate surface density of the battery and a charging rate, and an actually measured negative plate surface density of the battery; determining a first charging time of the battery according to a second correlation between the charging rate and a charging time, and the first charging rate; determining a second charging rate of the battery according to a third correlation between a first stage charging rate and a second stage charging rate in a constant current charging stage, and the first charging rate; controlling the battery to perform first stage constant current charging at the first charging rate and the first charging time, and controlling the battery to perform second stage constant current charging at the second charging rate until a charging end condition is reached, and the charging is ended. The method can solve the problem of how to control the battery to be quickly charged and not to be lithiumized.

Description

Battery charging control methods, devices and electronic equipment, and storage media Technical Field

[0001] This application relates to battery charging control technology, and more particularly to a battery charging control method, device, electronic device, and storage medium. Background Technology

[0002] Lithium-ion batteries have advantages such as high battery voltage, large specific capacity, low self-discharge effect, long cycle life and no memory effect among rechargeable batteries, making them the best type of rechargeable battery for portable electronic devices and electric vehicles.

[0003] Currently, the charging method for lithium-ion batteries is determined based on the cell's voltage and state of charge (SOC). Specifically, a higher current rate is used at a lower SOC, and a lower current rate is used at a higher SOC. In practical applications, the SOC of a cell during charging is often not zero, or is extremely low. If a low charging current is used in this case, the charging speed will be too slow, resulting in a poor user charging experience. However, blindly using a high current rate for cell charging may lead to lithium plating in the battery.

[0004] How to control the battery to charge quickly while preventing lithium plating remains a question that needs to be considered. Summary of the Invention

[0005] This application provides a battery charging control method, device, electronic device, and storage medium to solve the problem of how to control the battery to charge quickly while preventing lithium deposition.

[0006] On one hand, this application provides a battery charging control method, including:

[0007] Based on the first correlation between the negative electrode surface density and the charging rate of the battery, and the actual measured negative electrode surface density of the battery, the first charging rate of the battery is determined; and,

[0008] Based on the second correlation between charging rate and charging time, and the first charging rate, the first charging time of the battery is determined; and,

[0009] Based on the third correlation between the first stage charging rate and the second stage charging rate in the constant current charging stage, and the first charging rate, the second charging rate of the battery is determined, wherein the first charging rate is greater than the second charging rate.

[0010] The battery is controlled to perform a first-stage constant current charging at the first charging rate and the first charging duration, and the battery is controlled to perform a second-stage constant current charging at the second charging rate, until the charging end condition is met, at which point the charging ends.

[0011] In one embodiment, determining the first charging rate of the battery based on a first correlation between the negative electrode surface density and the charging rate, and the actually measured negative electrode surface density of the battery, includes:

[0012] Obtain the first coefficient and first exponent of the charging rate in the first association relationship, as well as the first value;

[0013] The first charge rate of the battery is determined based on the first coefficient, the first index, the first value, and the actual measured surface density of the negative electrode of the battery.

[0014] In one embodiment, determining the first charging time of the battery based on the second correlation between the charging rate and the charging time, and the first charging rate, includes:

[0015] Obtain the second coefficient and second exponent of the charging rate in the second association relationship, as well as the second value;

[0016] The first charging time of the battery is determined based on the second coefficient, the second exponent, the second value, and the first charging rate.

[0017] In one embodiment, determining the second charging rate of the battery based on the third correlation between the first charging rate and the second charging rate, and the first charging rate, includes:

[0018] Obtain the range of values ​​for the ratio between the second charging rate and the first charging rate in the third association relationship;

[0019] The second charging rate of the battery is determined based on the range of values ​​and the first charging rate.

[0020] In one embodiment, in the first association relationship, the first coefficient is 14.7, the first exponent is -0.68, and the first value is 1;

[0021] In the second correlation, the second coefficient is 15, the second exponent is -1, and the second value is 1;

[0022] In the third association relationship, the value range is greater than or equal to 0.4 and less than or equal to 1.

[0023] In one embodiment, controlling the battery to perform a second-stage constant current charging at the second charging rate until the charging termination condition is met, and then ending the charging process, includes:

[0024] The battery is controlled to undergo a second stage of constant current charging at the second charging rate. When the real-time voltage of the battery reaches the cutoff voltage, the battery is controlled to undergo constant voltage charging.

[0025] When the charging current of the battery reaches the cutoff current, the charging end condition is met, and charging ends.

[0026] In one embodiment, the ratio of the reversible surface capacity of the negative electrode to the reversible surface capacity of the positive electrode of the battery ranges from 1 to 1.2.

[0027] On the other hand, this application provides a battery charging control device, including:

[0028] The processing module is configured to determine a first charging rate of the battery based on a first correlation between the negative electrode surface density and the charging rate, and the actually measured negative electrode surface density of the battery; and,

[0029] The processing module is further configured to determine the first charging time of the battery based on a second correlation between the charging rate and the charging time, and the first charging rate; and,

[0030] The processing module is further configured to determine the second charging rate of the battery based on a third correlation between the first charging rate and the second charging rate, and the first charging rate.

[0031] The charging control module is used to control the battery to perform a first-stage constant current charging at the first charging rate and the first charging duration, and to control the battery to perform a second-stage constant current charging at the second charging rate, until the charging end condition is met, and then the charging ends.

[0032] On the other hand, this application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0033] The memory stores computer-executed instructions;

[0034] The processor executes computer execution instructions stored in the memory to implement the battery charging control method as described in the first aspect.

[0035] On the other hand, this application provides a computer-readable storage medium storing computer-executable instructions that, when executed, cause a computer to perform the battery charging control method as described in the first aspect.

[0036] On the other hand, this application provides a computer program product, including a computer program that, when executed by a processor, implements the battery charging control method as described in the first aspect.

[0037] In summary, the battery charging control method provided in the embodiments of this application includes: determining a first charging rate of the battery based on a first correlation between the negative electrode surface density and the charging rate, and the actual measured negative electrode surface density of the battery; determining a first charging time of the battery based on a second correlation between the charging rate and the charging duration, and the first charging rate; determining a second charging rate of the battery based on a third correlation between the first stage charging rate and the second stage charging rate in the constant current charging stage, and the first charging rate, wherein the first charging rate is greater than the second charging rate; controlling the battery to perform a first stage of constant current charging at the first charging rate and the first charging time, and controlling the battery to perform a second stage of constant current charging at the second charging rate, until the charging termination condition is met, and then ending the charging process.

[0038] That is, based on the actual measured negative electrode surface density of the battery, the first charging rate of the first charging stage in the constant current charging phase is first determined, which is a larger charging rate, to ensure that lithium plating does not occur during charging at this first charging rate. Then, the first charging duration of the first charging stage is determined based on the first charging rate. Next, the second charging rate of the second charging stage is determined based on the pre-set third correlation, and the determined second charging rate is less than the first charging rate. When controlling battery charging, the battery is controlled to perform the first stage of constant current charging using the first charging rate (the larger charging rate) and the first charging duration, and then controlled to perform the second stage of constant current charging using the second charging rate (the smaller charging rate). Unlike existing solutions that use a smaller charging current, the battery charging control method provided in this application starts charging with a large current rate, improving the battery charging speed. Therefore, the battery charging control method provided in this application can both control the battery to charge quickly and ensure that lithium plating does not occur during the charging process. Attached Figure Description

[0039] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0040] Figure 1 is a schematic diagram of an application scenario of the battery charging control method provided in this application;

[0041] Figure 2 is a schematic flowchart of a battery charging control method provided in an embodiment of this application;

[0042] Figure 3 is a schematic diagram of a battery charging control device provided in an embodiment of this application;

[0043] Figure 4 is a schematic diagram of an electronic device provided in one embodiment of this application.

[0044] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0046] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0047] Currently, the charging method for lithium-ion batteries is determined based on the cell's voltage and state of charge (SOC). Specifically, a higher current rate is used at a lower SOC, and a lower current rate is used at a higher SOC. In practical applications, the SOC of a cell during charging is often not zero, or is extremely low. If a low charging current is used in this case, the charging speed will be too slow, resulting in a poor user charging experience. However, blindly using a high current rate for cell charging may lead to lithium plating in the battery.

[0048] Based on this, this application provides a battery charging control method, apparatus, electronic device, and storage medium. The battery charging control method is used to determine the battery charging mechanism based on the negative electrode surface density of the battery to avoid lithium plating during battery charging. Specifically, a first charging rate of the battery is determined based on a first correlation between the negative electrode surface density and the charging rate, and the actually measured negative electrode surface density of the battery; a first charging time of the battery is determined based on a second correlation between the charging rate and the charging duration, and the first charging rate; and a second charging rate of the battery is determined based on a third correlation between the first-stage charging rate and the second-stage charging rate in the constant current charging phase, and the first charging rate, wherein the first charging rate is greater than the second charging rate; the battery is controlled to perform a first-stage constant current charging at the first charging rate and the first charging time, and the battery is controlled to perform a second-stage constant current charging at the second charging rate, until the charging termination condition is met, at which point charging ends.

[0049] That is, based on the actual measured negative electrode surface density of the battery, the first charging rate of the first charging stage in the constant current charging phase is first determined, which is a larger charging rate, to ensure that lithium plating does not occur during charging at this first charging rate. Then, the first charging duration of the first charging stage is determined based on the first charging rate. Next, the second charging rate of the second charging stage is determined based on the pre-set third correlation, and the determined second charging rate is less than the first charging rate. When controlling battery charging, the battery is controlled to perform the first stage of constant current charging using the first charging rate (the larger charging rate) and the first charging duration, and then controlled to perform the second stage of constant current charging using the second charging rate (the smaller charging rate). Unlike existing solutions that use a smaller charging current, the battery charging control method provided in this application starts charging with a large current rate, improving the battery charging speed. Therefore, the battery charging control method provided in this application can both control the battery to charge quickly and ensure that lithium plating does not occur during the charging process.

[0050] The battery charging control method provided in this application is applied to electronic devices, such as controllers installed in terminal devices, controllers for remotely controlling terminal devices, etc., where the terminal device includes a lithium-ion battery. Figure 1 is a schematic diagram of the application of the charging data determination method provided in this application. In the figure, a first charging rate of the battery is determined based on the actual measured negative electrode surface density of the battery and a first correlation between the negative electrode surface density and the charging rate; a first charging time is determined based on the first charging rate and a second correlation between the charging rate and the charging duration; and a second charging rate is determined based on the first charging rate and a third correlation between the first stage charging rate and the second stage charging rate in the constant current charging stage. Finally, the battery is controlled to perform a first stage of constant current charging at the first charging rate and the first charging duration, and the battery is controlled to perform a second stage of constant current charging at the second charging rate, until the charging termination condition is met, at which point the charging ends.

[0051] Please refer to Figure 2. One embodiment of this application provides a battery charging control method, including:

[0052] S210, based on the first correlation between the negative electrode surface density and the charging rate of the battery, and the actual measured negative electrode surface density of the battery, determine the first charging rate of the battery.

[0053] Optionally, in the battery described in this embodiment, the ratio of the reversible surface capacity of the negative electrode to the reversible surface capacity of the positive electrode, i.e., the N / P ratio, ranges from 1 to 1.2. The positive electrode material of this battery can be one or more of lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, lithium nickel oxide, lithium manganese oxide, and lithium iron phosphate. The negative electrode material of this battery can be one or more of graphite, carbon, silicon oxide, silicon carbide, lithium titanate, and tin-based negative electrode materials.

[0054] The surface density of the negative electrode of the battery (mg / cm³) 2 The areal density of the battery's negative electrode coating can be obtained through measurement, for example, by simultaneously tracking and measuring the coating with multiple scanning devices. This yields the areal density of the net coating on the negative electrode, i.e., the areal density of the battery's negative electrode sheet. During battery charging, if the areal density of the battery's negative electrode exceeds a preset value, it indicates that lithium plating has occurred. Based on this consideration, a first correlation is established between the battery's negative electrode areal density and the charging rate to control the charging rate setting so that the battery's negative electrode areal density does not exceed the preset value, thus preventing lithium plating.

[0055] The first correlation between the negative electrode areal density and the charging rate of the battery is preset. This first correlation includes a first coefficient, a first exponent, and a first value for the charging rate. First, the first coefficient, the first exponent, and the first value for the charging rate in the first correlation are obtained. Then, based on the first coefficient, the first exponent, the first value, and the actually measured negative electrode areal density of the battery, the first charging rate of the battery is determined. Optionally, the first coefficient is 14.7, the first exponent is -0.68, and the first value is 1. Assuming that the charging rate is represented by 'a' and the negative electrode areal density of the battery is represented by 'c' in the first correlation, then the first correlation is c = 14.7a. -0.68 ±1. Substituting the actual measured negative electrode surface density of the battery into c in the first correlation, a can be calculated, and the calculated value of a is the first charging rate of the battery.

[0056] S220, based on the second correlation between the charging rate and the charging time, and the first charging rate, determine the first charging time of the battery.

[0057] To avoid lithium plating in the battery, this embodiment controls the battery to undergo stepped constant current charging, that is, charging is first performed with a higher current rate, followed by charging with a lower current rate. Therefore, after determining the first charging rate for the first stage of constant current charging, it is also necessary to determine the charging duration of the first stage of constant current charging, i.e., the first charging duration. After controlling the battery to be charged at the first charging rate for the first charging duration, the battery is controlled to enter the second stage of constant current charging.

[0058] The second correlation is preset and includes a second coefficient and a second exponent of the charging rate, as well as a second value. First, the second coefficient, the second exponent, and the second value of the charging rate in the second correlation are obtained. Then, based on the second coefficient, the second exponent, the second value, and the first charging rate, the first charging duration of the battery is determined. Optionally, the second coefficient is 15, the second exponent is -1, and the second value is 1. Assuming the charging rate is represented by 'a' and the charging duration by 't' in the second correlation, then the second correlation is t = 15a. -1 ±1. Substituting the first charging rate determined in step S210 into a in the second correlation, t can be calculated, and the calculated t value is the first charging time of the battery.

[0059] S230, based on the third correlation between the first stage charging rate and the second stage charging rate in the constant current charging stage, and the first charging rate, determine the second charging rate of the battery, wherein the first charging rate is greater than the second charging rate.

[0060] The third correlation is preset and includes the range of values ​​for the ratio between the second charging rate and the first charging rate. Specifically, the range of values ​​for the ratio between the second charging rate and the first charging rate in the third correlation is obtained. Based on this range and the first charging rate, the second charging rate of the battery is determined. Optionally, this range is greater than or equal to 0.4 and less than or equal to 1. If 'a' represents the first charging rate and 'b' represents the second charging rate, then 0.4 ≤ b / a ≤ 1.

[0061] As can be seen from this third correlation, the first charging rate is greater than the second charging rate.

[0062] S240, control the battery to perform a first stage of constant current charging at the first charging rate and the first charging duration, and control the battery to perform a second stage of constant current charging at the second charging rate, until the charging end condition is met, and then end the charging.

[0063] Specifically, the battery is controlled to undergo a second stage of constant current charging at the second charging rate. When the real-time voltage of the battery reaches the cutoff voltage, the battery is controlled to undergo constant voltage charging. When the charging current of the battery reaches the cutoff current, the charging termination condition is met, and charging ends.

[0064] The following examples illustrate the method for controlling the charging of the battery, and experiments verify the effectiveness of the method provided in this embodiment in controlling the charging of the battery.

[0065] Example 1: The areal density of the negative electrode of this battery is 11 mg / cm³. 2 The N / P ratio is 1.07. Step S210 determines the first charging rate to be 1.5C, step S220 determines the first charging duration to be 10 minutes, and step S230 determines the second charging rate to be 0.7C. Therefore, the battery is charged at 1.5C for 10 minutes, then at 0.7C until the cutoff voltage of 4.45V is reached, at which point constant voltage charging is initiated. During constant voltage charging, the charging current continuously decreases, and charging ends when the charging current reaches the cutoff current of 0.05C.

[0066] Table 1 shows the total charging time from the start of charging the battery at four different initial states of charge (SOC) to the end of charging.

[0067] Table 1:

[0068]

[0069] Table 2 shows four comparative examples of data when charging batteries of the same specification under different battery voltages.

[0070] Table 2:

[0071]

[0072] By comparing Tables 1 and 2, it can be seen that the battery charging control method provided in this embodiment can effectively shorten the time required for battery charging. Moreover, the larger the initial SOC of the battery, the better the effect of shortening the total battery charging time.

[0073] Example 2: The areal density of the negative electrode of this battery is 7 mg / cm³. 2 The N / P ratio is 1.07. Step S210 determines the first charging rate to be 3C, step S220 determines the first charging duration to be 5 minutes, and step S230 determines the second charging rate to be 2C. Therefore, the battery is charged at 3C for 5 minutes, then at 2C until the cutoff voltage of 4.45V is reached, at which point constant voltage charging is initiated. During constant voltage charging, the charging current continuously decreases, and charging ends when the charging current reaches the cutoff current of 0.05C.

[0074] Table 3 shows the total charging time from the start of charging the battery at four different initial states of charge (SOC) to the end of charging.

[0075] Table 3:

[0076]

[0077] Table 4 shows four comparative examples of data when charging batteries of the same specification under different battery voltages.

[0078] Table 4:

[0079]

[0080] By comparing Tables 3 and 4, it can be seen that the battery charging control method provided in this embodiment can effectively shorten the time required for battery charging. Moreover, the larger the initial SOC of the battery, the better the effect of shortening the total battery charging time.

[0081] Example 3: The areal density of the negative electrode of this battery is 5 mg / cm³. 2The N / P ratio is 1.07. Step S210 determines the first charging rate to be 5C, step S220 determines the first charging duration to be 3 minutes, and step S230 determines the second charging rate to be 3C. Therefore, the battery is charged at 5C for 3 minutes, then at 3C until the cutoff voltage of 4.45V is reached, at which point constant voltage charging is initiated. During constant voltage charging, the charging current continuously decreases, and charging ends when the charging current reaches the cutoff current of 0.05C.

[0082] Table 5 shows the total charging time from the start of charging the battery at four different initial states of charge (SOC) to the end of charging.

[0083] Table 5:

[0084]

[0085] Table 6 shows four comparative examples of data when charging batteries of the same specification under different battery voltages.

[0086] Table 6:

[0087]

[0088] By comparing Tables 5 and 6, it can be seen that the battery charging control method provided in this embodiment can effectively shorten the battery charging time, and the larger the initial SOC of the battery, the better the effect of shortening the total battery charging time.

[0089] Example 4: The areal density of the negative electrode of this battery is 3 mg / cm³. 2 The N / P ratio is 1.07. Step S210 determines the first charging rate to be 10C, step S220 determines the first charging duration to be 1.5 minutes, and step S230 determines the second charging rate to be 7C. Therefore, the battery is charged at 10C for 1.5 minutes, then at 7C until the cutoff voltage of 4.45V is reached, at which point constant voltage charging is initiated. During constant voltage charging, the charging current continuously decreases, and charging ends when the charging current reaches the cutoff current of 0.05C.

[0090] Table 7 shows the total charging time from the start of charging the battery at four different initial states of charge (SOC) to the end of charging.

[0091] Table 7:

[0092]

[0093] Table 8 shows four comparative examples of data when charging batteries of the same specification under different battery voltages.

[0094] Table 8:

[0095]

[0096] By comparing Tables 7 and 8, it can be seen that the battery charging control method provided in this embodiment can effectively shorten the battery charging time, and the larger the initial SOC of the battery, the better the effect of shortening the total battery charging time.

[0097] Combining Examples 1 to 4, the battery charging control method provided in this embodiment can effectively shorten the total charging time required for the battery.

[0098] In summary, the battery charging control method provided in this embodiment includes: determining a first charging rate of the battery based on a first correlation between the negative electrode surface density and the charging rate, and the actual measured negative electrode surface density of the battery; determining a first charging time of the battery based on a second correlation between the charging rate and the charging duration, and the first charging rate; determining a second charging rate of the battery based on a third correlation between the first stage charging rate and the second stage charging rate in the constant current charging stage, and the first charging rate, wherein the first charging rate is greater than the second charging rate; controlling the battery to perform a first stage of constant current charging at the first charging rate and the first charging duration, and controlling the battery to perform a second stage of constant current charging at the second charging rate, until the charging termination condition is met, and then ending the charging process.

[0099] That is, based on the actual measured negative electrode surface density of the battery, the first charging rate of the first charging stage in the constant current charging phase is first determined, which is a larger charging rate, to ensure that lithium plating does not occur during charging at this first charging rate. Then, the first charging duration of the first charging stage is determined based on the first charging rate. Next, the second charging rate of the second charging stage is determined based on the pre-set third correlation, and the determined second charging rate is less than the first charging rate. When controlling battery charging, the battery is controlled to perform the first stage of constant current charging using the first charging rate (the larger charging rate) and the first charging duration, and then controlled to perform the second stage of constant current charging using the second charging rate (the smaller charging rate). Unlike existing solutions that use a smaller charging current, the battery charging control method provided in this application starts charging with a large current rate, improving the battery charging speed. Therefore, the battery charging control method provided in this application can both control the battery to charge quickly and ensure that lithium plating does not occur during the charging process.

[0100] Please refer to Figure 3. One embodiment of this application also provides a battery charging control device 10, including:

[0101] The processing module 11 is used to determine the first charging rate of the battery based on the first correlation between the negative electrode surface density and the charging rate, and the actual measured negative electrode surface density of the battery.

[0102] The processing module 11 is also used to determine the first charging time of the battery based on the second correlation between the charging rate and the charging time, and the first charging rate.

[0103] The processing module 11 is also used to determine the second charging rate of the battery based on the third correlation between the first charging rate and the second charging rate, and the first charging rate.

[0104] The charging control module 12 is used to control the battery to perform a first stage of constant current charging at the first charging rate and the first charging duration, and to control the battery to perform a second stage of constant current charging at the second charging rate, until the charging end condition is met, and then the charging ends.

[0105] The processing module 11 is specifically used to obtain the first coefficient and the first exponent of the charging rate in the first correlation relationship, as well as the first value; and to determine the first charging rate of the battery based on the first coefficient, the first exponent, the first value and the actual measured surface density of the negative electrode of the battery.

[0106] The processing module 11 is specifically used to obtain the first coefficient and the first exponent of the charging rate in the first correlation relationship, as well as the first value; and to determine the first charging rate of the battery based on the first coefficient, the first exponent, the first value and the actual measured surface density of the negative electrode of the battery.

[0107] The processing module 11 is specifically used to obtain the range of values ​​for the ratio between the second charging rate and the first charging rate in the third association relationship; and to determine the second charging rate of the battery based on the range of values ​​and the first charging rate.

[0108] In the first association relationship, the first coefficient is 14.7, the first index is -0.68, and the first value is 1; in the second association relationship, the second coefficient is 15, the second index is -1, and the second value is 1; in the third association relationship, the value range is greater than or equal to 0.4 and less than or equal to 1.

[0109] The charging control module 12 is specifically used to control the battery to perform a second-stage constant current charging at the second charging rate. When the real-time voltage of the battery reaches the cutoff voltage, the battery is controlled to be charged at a constant voltage. When the charging current of the battery reaches the cutoff current, the charging end condition is met, and the charging ends.

[0110] The ratio of the reversible surface capacity of the negative electrode to the reversible surface capacity of the positive electrode of this battery ranges from 1 to 1.2.

[0111] Referring to Figure 4, one embodiment of this application also provides an electronic device 20, including a processor 21 and a memory 22 communicatively connected to the processor 21. The memory 21 stores computer-executable instructions, and the processor 21 executes the computer-executable instructions stored in the memory 22 to implement the battery charging control method provided in any of the preceding embodiments.

[0112] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed, cause the computer-executable instructions to be executed by a processor to implement the battery charging control method provided in any of the preceding embodiments.

[0113] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the battery charging control method as provided in any of the preceding embodiments.

[0114] It should be noted that the aforementioned computer-readable storage media can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disc, or compact disc read-only memory (CD-ROM), etc. It can also be various electronic devices that include one or any combination of the above-mentioned memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc.

[0115] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0116] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0117] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0118] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more flowchart illustrations and / or one or more block diagrams.

[0119] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0120] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0121] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A battery charging control method, characterized in that, include: Obtain a first coefficient, a first exponent, and a first value for the charging rate in a first correlation relationship between the negative electrode surface density and the charging rate of the battery; determine the first charging rate of the battery based on the first coefficient, the first exponent, the first value, and the actually measured negative electrode surface density of the battery; wherein, the first correlation relationship is: negative electrode surface density of the battery = first coefficient The first charging rate of the battery 所述第一指数 + the first value; and, obtain the second coefficient and the second exponent of the charging rate in the second correlation relationship between the charging rate and the charging time, as well as the second value; determine the first charging time of the battery based on the second coefficient, the second exponent, the second value, and the first charging rate; wherein, the second correlation relationship is that the first charging time of the battery = the second coefficient The first charging rate of the battery 所述第二指数 + the second value; and, obtain a third correlation between the first stage charging rate and the second stage charging rate in the constant current charging stage; the third correlation is the ratio between the second charging rate and the first charging rate; the ratio has a preset value range; determine the second charging rate of the battery according to the value range and the first charging rate, wherein the first charging rate is greater than the second charging rate; control the battery to perform the first stage constant current charging at the first charging rate and the first charging duration, and after controlling the battery to perform constant current charging at the first charging rate to reach the first charging duration, control the battery to perform the second stage constant current charging at the second charging rate until the charging end condition is met, and then end the charging.

2. The method according to claim 1, characterized in that, In the first association relationship, the first coefficient is 14.7, the first exponent is -0.68, and the first value is 1; in the second association relationship, the second coefficient is 15, the second exponent is -1, and the second value is 1; in the third association relationship, the value range is greater than or equal to 0.4 and less than or equal to 1.

3. The method according to any one of claims 1-2, characterized in that, The step of controlling the battery to perform a second-stage constant current charging at the second charging rate until the charging end condition is met, and ending the charging, includes: controlling the battery to perform a second-stage constant current charging at the second charging rate; when the real-time voltage of the battery reaches the cutoff voltage, controlling the battery to perform constant voltage charging; and when the charging current of the battery reaches the cutoff current, the charging end condition is met, and the charging ends.

4. The method according to any one of claims 1-2, characterized in that, The ratio of the reversible surface capacity of the negative electrode to the reversible surface capacity of the positive electrode of the battery ranges from 1 to 1.

2.

5. A battery charging control device, characterized in that, include: The processing module is configured to obtain a first coefficient, a first exponent, and a first value of the charging rate in a first correlation relationship between the negative electrode surface density and the charging rate of the battery; and to determine the first charging rate of the battery based on the first coefficient, the first exponent, the first value, and the actually measured negative electrode surface density of the battery; wherein, the first correlation relationship is that the negative electrode surface density of the battery = the first coefficient. The first charging rate of the battery 所述第一指数 + the first value; and, the processing module is further configured to obtain the second coefficient and the second exponent of the charging rate in the second correlation relationship between the charging rate and the charging time, as well as the second value; determine the first charging time of the battery based on the second coefficient, the second exponent, the second value and the first charging rate; wherein, the second correlation relationship is that the first charging time of the battery = the second coefficient The first charging rate of the battery 所述第二指数 + the second value; and, the processing module is further configured to obtain a third correlation between the first stage charging rate and the second stage charging rate in the constant current charging stage; the third correlation is the ratio between the second charging rate and the first charging rate; the ratio has a preset value range; the second charging rate of the battery is determined according to the value range and the first charging rate; wherein, the first charging rate is greater than the second charging rate; the charging control module is configured to control the battery to perform a first stage of constant current charging at the first charging rate and the first charging duration, and after the battery is controlled to perform constant current charging at the first charging rate to reach the first charging duration, control the battery to perform a second stage of constant current charging at the second charging rate, until the charging end condition is reached, and then end the charging.

6. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the battery charging control method as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions that, when executed, cause the computer to perform the battery charging control method as described in any one of claims 1-4.

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