Battery open-circuit voltage adjusting method, adjusting device and storage medium

Abstract

The invention relates to the technical field of batteries, in particular to a battery open-circuit voltage adjusting method and device and a storage medium. Firstly, the current open-circuit voltage of a target battery is obtained; and then determining whether the current open-circuit voltage of the target battery reaches a preset target open-circuit voltage, and if not, carrying out at least one voltage regulation process on the target battery. Wherein the single voltage regulation process comprises the following steps: determining a first to-be-regulated voltage corresponding to a target battery; determining a first to-be-adjusted charge quantity of the target battery according to the first to-be-adjusted voltage and the electric quantity-to-voltage ratio; determining a first duration of charging or discharging corresponding to the target battery according to the first charge quantity to be adjusted and the first current of the target battery; and controlling a target battery to charge or discharge according to the first current and the first duration. By controlling the charging and discharging current and the charging and discharging time, the open-circuit voltage of the battery can be adjusted to the target open-circuit voltage, and it can be guaranteed that the precision of open-circuit voltage adjustment is high.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery open circuit voltage regulation method, a regulation device and a storage medium. Background Art

[0002] In the battery field, in some battery testing and application scenarios, the open circuit voltage (OCV) of multiple batteries is required to have extremely high consistency. For example, the difference in the open circuit voltage of multiple batteries is required to reach the uV level, so the open circuit voltage of the voltage needs to be precisely adjusted.

[0003] In order to adjust the open circuit voltage of the voltage, in the related art, for multiple batteries, first use a constant current signal to charge the multiple batteries to a first voltage value, and then enter the constant voltage charging stage; after a period of rest, the multiple batteries are discharged at a constant current, and after the batteries are discharged to the voltage limit value, they are left to rest again, and then a constant voltage and constant current electrical signal is used to charge the batteries, and finally the open circuit voltage of the batteries is adjusted after resting again. Then, although the battery open circuit voltage adjustment method in the related art can achieve a certain degree of adjustment of the battery open circuit voltage, the adjustment accuracy is poor. Usually, the accuracy of the adjusted battery open circuit voltage is at the mV level, which cannot be applied to some scenarios with high requirements for the accuracy of the battery open circuit voltage. Therefore, the battery open circuit voltage adjustment method in the related art still has room for improvement. Summary of the invention

[0004] The present application provides a battery open circuit voltage regulation method, a regulation device and a storage medium to solve the technical problem of poor regulation accuracy of the battery open circuit voltage regulation method in the related art.

[0005] In a first aspect, the present application provides a method for regulating an open circuit voltage of a battery, the method comprising:

[0006] Get the current open circuit voltage of the target battery;

[0007] Determining whether the current open circuit voltage of the target battery reaches a preset target open circuit voltage, and if not, performing at least one voltage regulation process on the target battery;

[0008] Wherein, the voltage regulation process includes:

[0009] Determine a first voltage to be adjusted corresponding to the target battery according to the current open circuit voltage and the target open circuit voltage;

[0010] Obtaining the charge-to-voltage ratio of the target battery, and determining the first charge to be adjusted of the target battery according to the first voltage to be adjusted and the charge-to-voltage ratio; the charge-to-voltage ratio is the charge required to be charged or discharged when the voltage change of the battery is 1V;

[0011] Acquire a first current corresponding to the target battery during charging or discharging, and determine a first duration of charging or discharging corresponding to the target battery according to a first charge amount to be adjusted of the target battery and the first current;

[0012] The target battery is controlled to be charged or discharged according to the first current and the first duration.

[0013] In one possible design, after each completion of the voltage regulation process, it is determined again whether the open circuit voltage of the target battery after adjustment reaches the target open circuit voltage. If so, the voltage regulation is terminated; if not, the voltage regulation process is returned until the open circuit voltage of the target battery after adjustment reaches the target open circuit voltage.

[0014] If the difference between the current open circuit voltage and the target open circuit voltage is less than a preset target difference, it is determined that the adjusted open circuit voltage of the target battery reaches the target open circuit voltage; wherein the target difference is 1uV to 500uV.

[0015] In a possible design, after each voltage regulation process is completed, the target battery is left to rest for a second period of time;

[0016] The second time period of standing still after the next voltage regulation process is completed is shorter than the time period of standing still after the last voltage regulation process is completed.

[0017] In a possible design, the battery open circuit voltage regulation method further includes:

[0018] After the target battery is left to stand for a second period of time, determining whether the current open circuit voltage of the target battery reaches the target open circuit voltage, and if not, determining a second voltage to be adjusted corresponding to the target battery according to the current open circuit voltage and the target open circuit voltage;

[0019] Determining a second charge to be adjusted of the target battery according to the second voltage to be adjusted and the charge-to-voltage ratio;

[0020] Acquire a second current corresponding to the target battery during charging or discharging, and determine a third duration corresponding to the charging or discharging of the target battery according to the first charge to be adjusted of the target battery and the second current;

[0021] Controlling the target battery to charge or discharge according to the second current and the third duration;

[0022] Wherein, a current value of the second current is smaller than a current value of the first current.

[0023] In a possible design, the battery open circuit voltage regulation method further includes, after the last charge or discharge is completed, if it is determined that the current open circuit voltage of the target battery does not reach the target open circuit voltage, obtaining the voltage change amount and the charge amount of the target battery in the last regulation process;

[0024] Recalculate the power-to-voltage ratio and update the power-to-voltage ratio according to the voltage change of the target battery and the charge amount of charging or discharging in the last adjustment process;

[0025] A second charge to be adjusted of the target battery is determined according to the second voltage to be adjusted and the updated charge-to-voltage ratio.

[0026] In a possible design, the battery open circuit voltage regulation method also includes that the first current and / or the second current is a ramp current with a decreasing current value.

[0027] In a possible design, the first current and / or the second current is an alternating current whose current value alternates between positive and negative values, wherein the target battery is charged when the current value is positive, and the target battery is discharged when the current value is negative.

[0028] In one possible design, the battery open circuit voltage regulation method further includes, when the current open circuit voltage of the target battery is greater than the target open circuit voltage, controlling the target battery to discharge;

[0029] When the current open circuit voltage of the target battery is less than the target open circuit voltage, the target battery is controlled to be charged.

[0030] In a second aspect, the present application further provides a method for batch regulating the open circuit voltage of batteries, the method for batch regulating the open circuit voltage of batteries comprising:

[0031] Select any battery to be adjusted as a reference battery, and obtain the charge-to-voltage ratio of the reference battery; the charge-to-voltage ratio is the amount of charge that needs to be charged or discharged when the voltage change of the battery is 1V;

[0032] For any target battery in the batch of batteries, determine whether the current open circuit voltage of the target battery reaches a preset target open circuit voltage, and if not, perform at least one voltage regulation process on the target battery;

[0033] Wherein, the voltage regulation process includes:

[0034] Determine a first voltage to be adjusted corresponding to the target battery according to the current open circuit voltage and the target open circuit voltage;

[0035] Determining a first charge to be adjusted of the target battery according to the first voltage to be adjusted and the charge-to-voltage ratio;

[0036] Acquire a first current corresponding to the target battery during charging or discharging, and determine a first duration of charging or discharging corresponding to the target battery according to a first charge amount to be adjusted of the target battery and the first current;

[0037] The target battery is controlled to be charged or discharged according to the first current and the first duration.

[0038] In a third aspect, the present application also provides a battery open circuit voltage regulating device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement the steps of the battery open circuit voltage regulating method as described above; or, the processor is used to execute the computer program to implement the steps of the battery open circuit voltage batch regulating method as described above.

[0039] In a fourth aspect, the present application further provides a storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the battery open circuit voltage regulation method as described above; or implements the steps of the battery open circuit voltage batch regulation method as described above.

[0040] According to the battery open circuit voltage regulation method provided in the first aspect above, first obtain the current open circuit voltage of the target battery; then determine whether the current open circuit voltage of the target battery reaches the preset target open circuit voltage, if not, perform at least one voltage regulation process on the target battery. Among them, the single voltage regulation process includes: determining the first voltage to be adjusted corresponding to the target battery according to the current open circuit voltage and the target open circuit voltage; obtaining the target battery's power voltage ratio, and determining the first charge to be adjusted of the target battery according to the first voltage to be adjusted and the power voltage ratio; obtaining the first current corresponding to the target battery during charging or discharging, and determining the first duration of charging or discharging corresponding to the target battery according to the first charge to be adjusted and the first current of the target battery; and controlling the target battery to charge or discharge according to the first current and the first duration. It can be seen that the present application converts the open circuit voltage regulation of the battery into the regulation of the charge amount of the battery for charging or discharging. By controlling the charge and discharge current and the charge and discharge time, the open circuit voltage of the battery can be adjusted to the target open circuit voltage, and the accuracy of the open circuit voltage regulation can be ensured to reach the uV level, so that the battery can be used in scenarios with high requirements for the accuracy of the battery open circuit voltage.

[0041] The beneficial effects provided in the above-mentioned other aspects and the possible designs of the above-mentioned other aspects can be referred to the beneficial effects brought about by the above-mentioned first aspect and the possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0043] Figure 1 A schematic diagram of a flow chart of a method for regulating the open circuit voltage of a battery provided in an embodiment of the present application;

[0044] Figure 2 A schematic diagram of a primary voltage regulation process provided in an embodiment of the present application;

[0045] Figure 3 A flow chart of a method for batch regulating the open circuit voltage of batteries provided in this embodiment;

[0046] Figure 4 This is a schematic diagram of the voltage regulation process for any battery in a batch of batteries in an embodiment of the present application;

[0047] Figure 5 A schematic diagram of the structure of a battery open circuit voltage regulating device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] In the present application, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a alone, b alone, or c alone can mean: a alone, b alone, c alone, a and b in combination, a and c in combination, b and c in combination, or a, b, and c in combination, where a, b, and c can be single or multiple.

[0049] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "plurality" means two or more.

[0050] In order to achieve precise regulation of the open circuit voltage of the battery, the related art usually samples the constant voltage and constant current method to charge and discharge the battery, and then leaves it alone for a period of time to ensure that the open circuit voltages of multiple batteries are consistent. Although this method can regulate the open circuit voltage of the battery to a certain extent, the regulation accuracy is low. At present, the regulation method provided by the related art can only adjust the open circuit voltage of the battery to the mV level. Due to the low regulation accuracy, it cannot be used in some scenarios with high requirements on the accuracy of the battery voltage.

[0051] In order to overcome the deficiencies in the above-mentioned related technologies, the present application provides a method for regulating the open circuit voltage of a battery. The inventive concept of the method for regulating the open circuit voltage of a battery in the present application is: according to the changing relationship between the open circuit voltage of the battery and the amount of charge in the battery, the regulation of the open circuit voltage of the battery is converted into the regulation of the amount of charge of the battery, so that the amount of charge of the battery is regulated by charging and discharging, thereby achieving the purpose of regulating the open circuit voltage of the battery.

[0052] Specifically, in order to realize the above-mentioned inventive concept, the present application first obtains the current open circuit voltage of the target battery; determines whether the current open circuit voltage of the target battery reaches the preset target open circuit voltage, and if not, performs at least one voltage regulation process on the target battery. In each voltage regulation process, first determine the first voltage to be adjusted corresponding to the target battery according to the current open circuit voltage and the target open circuit voltage, then obtain the power voltage ratio of the target battery, and determine the first charge to be adjusted of the target battery according to the first voltage to be adjusted and the power voltage ratio; the power voltage ratio is the charge amount that needs to be charged or discharged when the voltage change of the battery is 1V; obtain the first current corresponding to the target battery during charging or discharging, and determine the first duration of charging or discharging corresponding to the target battery according to the first charge to be adjusted and the first current of the target battery; and control the target battery to charge or discharge according to the first current and the first duration. In this way, the open circuit voltage of the battery can be adjusted to the target open circuit voltage through one or more voltage regulation processes, and the regulation accuracy can reach the uV level, so that the battery can be used in scenarios with high requirements for the accuracy of the battery open circuit voltage.

[0053] It can be understood that the battery open circuit voltage regulation method provided in the present application can perform open circuit voltage regulation on one battery at a time, or can also perform open circuit voltage regulation on multiple batteries at the same time. The following embodiment takes the open circuit voltage regulation on one battery as an example to further illustrate the battery open circuit voltage regulation method of the present application.

[0054] Figure 1 For a flow chart of the battery open circuit voltage regulation method provided in the embodiment of the present application, please refer to Figure 1 As shown, the battery open circuit voltage regulation method includes:

[0055] S101. Obtain the current open circuit voltage of the target battery.

[0056] In some embodiments, a battery that needs to be regulated for open circuit voltage can be used as a target battery, and a voltmeter can be set between the two poles of the target battery. In this way, the target battery can be regarded as having a voltmeter connected to the open circuit, and the voltmeter reading is the open circuit voltage of the target battery.

[0057] S102: Determine whether the current open circuit voltage of the target battery reaches a preset target open circuit voltage; if not, perform at least one voltage regulation process on the target battery.

[0058] In this embodiment, after obtaining the current open circuit voltage of the target battery, it is first determined whether the current open circuit voltage of the target battery is equal to the target open circuit voltage. If not, it is determined that the current open circuit voltage of the target battery does not reach the preset target open circuit voltage, and the target battery needs to be subjected to at least one voltage regulation process.

[0059] The number of times the voltage regulation process is performed on the target battery can be determined based on the actual required accuracy and the result after adjustment. For example, if the accuracy of the open circuit voltage of the target battery is required to be high, the voltage regulation process can be performed twice or three times to cyclically adjust the open circuit voltage of the battery so that the open circuit voltage regulation accuracy of the battery is higher. In some embodiments, if after one adjustment process, it is detected that the open circuit voltage of the battery is still slightly different from the target open circuit voltage, the voltage regulation process can be performed once or twice more to make the open circuit voltage of the battery reach the target open circuit voltage.

[0060] Figure 2 For a schematic diagram of a primary voltage regulation process provided in the embodiment of the present application, see Figure 2 As shown, in this embodiment, a voltage regulation process includes:

[0061] S201. Determine a first voltage to be adjusted corresponding to a target battery according to a current open circuit voltage and a target open circuit voltage.

[0062] In one embodiment, the first voltage to be adjusted corresponding to the target battery can be determined according to the current open circuit voltage and the target open circuit voltage. In other words, the first voltage to be adjusted is the voltage difference between the current open circuit voltage and the target open circuit voltage of the target battery.

[0063] It can be understood that when the current open circuit voltage is greater than the target open circuit voltage, the first voltage to be adjusted corresponding to the current open circuit voltage and the target open circuit voltage is a positive value, which indicates that the current target battery needs to be discharged; when the current open circuit voltage is greater than the target open circuit voltage, the first voltage to be adjusted corresponding to the current open circuit voltage and the target open circuit voltage is a negative value, which indicates that the current target battery needs to be charged.

[0064] S202, obtaining the charge-to-voltage ratio of the target battery, and determining a first charge to be adjusted of the target battery according to the first voltage to be adjusted and the charge-to-voltage ratio; the charge-to-voltage ratio is the charge required to be charged or discharged when the voltage change of the battery is 1V.

[0065] In some embodiments, before adjusting the open circuit voltage of the target battery, the target battery can be charged or discharged to record the change in open circuit voltage and charge during the charging or discharging process, and then the charge-to-voltage ratio can be calculated based on the change in open circuit voltage and charge.

[0066] In some embodiments, before adjusting the open circuit voltage of the target battery, the charge-to-voltage ratio may be first obtained by looking up a table.

[0067] Through the above method of obtaining the target battery's charge-to-voltage ratio, it can be known that the charge-to-voltage ratio is the amount of charge that needs to be charged or discharged when the battery's voltage changes by 1 V. The charge-to-voltage ratio can be expressed as dQ / dV, where V represents the change in the battery's open circuit voltage and Q represents the change in the battery's charge. Therefore, the unit of the charge-to-voltage ratio is Ah / V.

[0068] Based on the charge-to-voltage ratio of the target battery and the first voltage to be adjusted, the first charge to be adjusted of the target battery can be calculated, that is, the first charge to be adjusted can be obtained by multiplying the first voltage to be adjusted by the charge-to-voltage ratio.

[0069] S203, obtaining a first current corresponding to charging or discharging of the target battery, and determining a first duration corresponding to charging or discharging of the target battery according to a first charge to be adjusted and the first current of the target battery.

[0070] In some embodiments, after obtaining the first charge amount to be adjusted that needs to be adjusted for the target battery, the first duration of charging or discharging corresponding to the target battery can be determined according to the preset first current for charging or discharging the target battery. Specifically, the first charge amount to be adjusted divided by the first current can obtain the first duration of charging or discharging.

[0071] S204: Control the target battery to charge or discharge according to the first current and the first duration.

[0072] Specifically, the target battery is charged or discharged using the first current, and the charging or discharging time is the calculated first time, so that the open circuit voltage of the target battery can be adjusted to the target open circuit voltage.

[0073] It can be seen that according to the battery open circuit voltage regulation method provided in this embodiment, the charge-to-voltage ratio of the target battery can be obtained according to the characteristics of the battery, and then the open circuit voltage regulation is converted into the battery charge regulation, and then the target battery is charged and discharged to adjust the open circuit voltage of the target battery to the target open circuit voltage, and the regulation accuracy can reach the uV level, so that the regulation accuracy is relatively high.

[0074] In some embodiments, after each voltage regulation process is completed, it is determined again whether the adjusted open circuit voltage of the target battery reaches the target open circuit voltage. If so, the voltage regulation is terminated; if not, the voltage regulation process is returned until the adjusted open circuit voltage of the target battery reaches the target open circuit voltage. For example, for battery A, after the first voltage regulation process, it is determined that there is still a small gap between the open circuit voltage of battery A and the target open circuit voltage, then the second voltage regulation process can be controlled to be performed on battery A so that the open circuit voltage of battery A reaches the target open circuit voltage.

[0075] If the difference between the current open circuit voltage and the target open circuit voltage is less than a preset target difference, it is determined that the adjusted open circuit voltage of the target battery reaches the target open circuit voltage; wherein the target difference can be set to any value between 1uV and 500uV.

[0076] For example, the target difference may be set to 100 uV, that is, when the difference between the current open circuit voltage and the target open circuit voltage is less than 100 uV, it is determined that the adjusted open circuit voltage of the target battery reaches the target open circuit voltage.

[0077] It can be understood that the smaller the target difference is set, the higher the accuracy of the adjusted open circuit voltage of the battery will be when the adjusted open circuit voltage of the target battery reaches the target open circuit voltage.

[0078] It should be noted that for batteries that require multiple adjustments, the charge and discharge current used in each subsequent adjustment process is smaller than the charge and discharge current in the previous adjustment. Since the open circuit voltage of the battery is closer to the target open circuit voltage after each adjustment, the charge and discharge current used in each subsequent adjustment process is smaller than the charge and discharge current in the previous adjustment, which can improve the adjustment accuracy and make the open circuit voltage of the battery reach the target open circuit voltage.

[0079] It should be noted that after each voltage regulation process is completed, the target battery is left to stand for a second period of time to depolarize the target battery; wherein the second period of time after the next voltage regulation process is completed is less than the period of time after the previous voltage regulation process is completed. Since the current value used in each subsequent regulation is smaller and the polarization generated is smaller, the time required to stand is gradually shortened. For example, after the first voltage regulation process is performed on the target battery, it is left to stand for thirty minutes, and then after the second voltage regulation process is performed on the target battery, it is left to stand for twenty minutes, and the standing time is shortened successively to improve the voltage regulation efficiency.

[0080] In some embodiments, for example, if the target battery needs to be voltage regulated twice, after the first voltage regulation is completed, after the target battery is left to stand for a second period of time, determine whether the current open circuit voltage of the target battery reaches the target open circuit voltage. If not, determine the second voltage to be regulated corresponding to the target battery according to the current open circuit voltage and the target open circuit voltage; determine the second charge to be regulated of the target battery according to the second voltage to be regulated and the power voltage ratio; obtain the second current corresponding to the target battery during charging or discharging, and determine the third charging or discharging time corresponding to the target battery according to the first charge to be regulated and the second current of the target battery; control the target battery to charge or discharge according to the second current and the third time; wherein the current value of the second current is less than the current value of the first current. In this way, after two voltage regulation processes, the open circuit voltage of the battery reaches the target open circuit voltage.

[0081] In some embodiments, when multiple voltage regulation processes are required for the target battery, the charge-to-voltage ratio in each subsequent regulation process can be calculated based on the charge and voltage change collected in the previous regulation process. This is equivalent to updating the charge-to-voltage ratio in each regulation process, so that the regulation accuracy of each subsequent voltage regulation process is higher, thereby allowing the open circuit voltage of the battery to be accurately adjusted to the target open circuit voltage.

[0082] In some embodiments, after the last charge or discharge is completed, if it is determined that the current open circuit voltage of the target battery has not reached the target open circuit voltage, the voltage change of the target battery in the last adjustment process and the charge or discharge amount are obtained; based on the voltage change of the target battery in the last adjustment process and the charge or discharge amount, the charge-to-voltage ratio is recalculated and updated; and the second charge to be adjusted of the target battery is determined based on the second voltage to be adjusted and the updated charge-to-voltage ratio.

[0083] In some embodiments, the first current and the second current may be fixed current values, that is, the charge amount of the battery is adjusted by constant current charging or discharging.

[0084] In another embodiment, the first current and the second current are current values ​​that can be set to a decreasing ramp current, so that as the charge and discharge time passes, the current value gradually decreases. At the initial moment, the current value is large, which can ensure rapid charge and discharge to increase the adjustment speed, and at the moment when the adjustment is about to end, the current value is small, which can ensure the accuracy of the adjustment.

[0085] It is understandable that when the first current or the second current is a ramp current with a decreasing current value, the charge amount in the adjustment process is also the integral of the current over time. In actual application scenarios, technicians can choose to use a constant current charging and discharging method or set the current to a decreasing ramp current according to needs, which is not limited here.

[0086] In some embodiments, the first current and the second current can be alternating current values ​​that alternate between positive and negative, that is, the battery is charged when the current value is positive, and the target battery is discharged when the current value is negative, thereby realizing a charging and discharging cycle of the target battery, thereby adjusting the charge of the target battery.

[0087] For example, in one embodiment, for example, in a charging process, the battery is cyclically charged and discharged in a charge-discharge-charge cycle, and only the charge amount required to charge or discharge the battery is required. Specifically, for example, 0-10s discharge, 10-20s charging, 20-30s discharge, 30-40s charging, and so on, the total time is 200s; the discharge current is greater than the charging current, so that the battery discharges the required amount of charge, thereby completing the open circuit voltage adjustment. It is also possible: for example, 0-20s discharge, 20-30s charging, 30-50s discharge, 50-60s charging, and so on, the total time is 300s; the discharge current is equal to the charging current, and each cycle discharges more than 10s, so that the battery discharges the required amount of charge, thereby completing the open circuit voltage adjustment. It is also possible: increase the frequency, 0-10ms discharge, 10-20ms charging, 20-30ms discharge, 30-40ms charging and so on, the total time is 200s. Alternatively, a current value with a certain waveform may be used, where current value = 2*sin(10*time)+0.5. A certain amount of electricity is charged in each cycle. By controlling the total time, the battery is charged with the required amount of charge, thereby completing the open circuit voltage adjustment.

[0088] It can be understood that when the current open circuit voltage of the target battery is greater than the target open circuit voltage, the target battery is controlled to discharge, and when the current open circuit voltage of the target battery is less than the target open circuit voltage, the target battery is controlled to charge, so that the open circuit voltage of the battery can be adjusted to the target open circuit voltage. Charging and discharging in this embodiment refer to the results after integration.

[0089] The following describes the battery open circuit voltage regulation method of the present application by taking batch batteries as an example. The battery open circuit voltage regulation method can regulate the open circuit voltages of multiple batteries so that the open circuit voltages of the multiple batteries reach consistency.

[0090] Figure 3 For the flow chart of the battery open circuit voltage batch adjustment method provided in this embodiment, please refer to Figure 3 As shown, the battery open circuit voltage batch regulation method includes:

[0091] S301. Select any battery to be adjusted as a reference battery, and obtain the charge-to-voltage ratio of the reference battery; the charge-to-voltage ratio is the amount of charge that needs to be charged or discharged when the voltage change of the battery is 1V.

[0092] It can be understood that, in general, for a batch of batteries, the various parameters of its multiple batteries are basically the same or close. Therefore, a certain battery can be selected as a reference battery, and the charge-to-voltage ratio of the reference battery can be obtained as a basis for adjusting the charge of other batteries in the batch battery. In this way, there is no need to obtain the charge-to-voltage ratio of each battery, which can improve the regulation efficiency of the open circuit voltage of the batch battery.

[0093] S302: for any target battery in the batch of batteries, determine whether the current open circuit voltage of the target battery reaches a preset target open circuit voltage; if not, perform at least one voltage regulation process on the target battery.

[0094] In other words, at least one voltage regulation process is performed for each battery in the annotated battery that does not meet the target open circuit voltage, so that the open circuit voltage of each battery in the annotated battery reaches the target open circuit voltage.

[0095] Figure 4 This is a schematic diagram of the voltage regulation process for any battery in a batch of batteries in the embodiment of this application, please refer to Figure 4 As shown in FIG. 1 , the voltage regulation process includes:

[0096] S401. Determine a first voltage to be adjusted corresponding to a target battery according to a current open circuit voltage and a target open circuit voltage.

[0097] S402: Determine a first charge to be adjusted of a target battery according to the first voltage to be adjusted and the charge-to-voltage ratio.

[0098] S403: Obtain a first current corresponding to charging or discharging of the target battery, and determine a first duration corresponding to charging or discharging of the target battery according to a first charge to be adjusted and the first current of the target battery.

[0099] S404: Control the target battery to charge or discharge according to the first current and the first duration.

[0100] In some embodiments, after each voltage regulation process is completed, it is determined again whether the open circuit voltage of the target battery after adjustment reaches the target open circuit voltage. If so, the voltage regulation is terminated; if not, the voltage regulation process is returned until the open circuit voltage of the target battery after adjustment reaches the target open circuit voltage.

[0101] For batteries that need multiple adjustments, the charge and discharge current used in each subsequent adjustment process is smaller than the charge and discharge current in the previous adjustment. Since the open circuit voltage of the battery is closer to the target open circuit voltage after each adjustment, the charge and discharge current used in each subsequent adjustment process is smaller than the charge and discharge current in the previous adjustment, which can improve the adjustment accuracy and make the open circuit voltage of the battery reach the target open circuit voltage.

[0102] It should be noted that after each voltage regulation process is completed, the target battery is left to stand for a second time period to depolarize the target battery; wherein the second time period after the next voltage regulation process is completed is less than the time period after the last voltage regulation process is completed. Since the current value used in each subsequent regulation is smaller and the polarization generated is smaller, the time required for standing is gradually shortened.

[0103] In some embodiments, when multiple voltage regulation processes are required for the target battery, the charge-to-voltage ratio in each subsequent regulation process can be calculated based on the charge and voltage change collected in the previous regulation process. This is equivalent to updating the charge-to-voltage ratio in each regulation process, so that the regulation accuracy of each subsequent voltage regulation process is higher, thereby allowing the open circuit voltage of the battery to be accurately adjusted to the target open circuit voltage.

[0104] In some embodiments, the first current and the second current can be fixed current values, that is, the charge of the battery is adjusted by constant current charging or discharging. In another embodiment, the first current and the second current are current values ​​that can be set to decreasing ramp currents, so that the current value gradually decreases as the charging and discharging time passes. At the initial moment, the current value is large, which can ensure rapid charging and discharging to increase the adjustment speed. At the moment when the adjustment is about to end, the current value is small, which can ensure the accuracy of the adjustment.

[0105] It can be understood that the method for regulating the open circuit voltage of a single battery in the above embodiment is also applicable to the open circuit voltage regulation process of batch batteries in this embodiment, and has the same technical effect, which will not be repeated here.

[0106] A battery open circuit voltage regulating device is provided below. The voltage regulating device can correspond to the above-mentioned voltage regulating method and will not be described in detail here.

[0107] Figure 5 For a schematic diagram of the structure of the battery open circuit voltage regulating device provided in the embodiment of the present application, please refer to Figure 5 As shown, this embodiment provides a battery open circuit voltage regulating device including a memory 501 and a processor 502, the memory 501 stores a computer program, and the processor 502 is used to execute the computer program to implement the steps of the battery open circuit voltage regulating method provided in the above embodiment; or, the processor 502 is used to execute the computer program to implement the steps of the battery open circuit voltage batch regulating method provided in the above embodiment.

[0108] This embodiment provides a storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the battery open circuit voltage regulation method provided in the above embodiment are implemented; or the steps of the battery open circuit voltage batch regulation method provided in the above embodiment are implemented.

[0109] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0110] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0111] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for regulating the open circuit voltage of a battery, characterized in that: include: Get the current open circuit voltage of the target battery; Determining whether the current open circuit voltage of the target battery reaches a preset target open circuit voltage, and if not, performing at least one voltage regulation process on the target battery; Wherein, the voltage regulation process includes: Determine a first voltage to be adjusted corresponding to the target battery according to the current open circuit voltage and the target open circuit voltage; Obtaining the charge-to-voltage ratio of the target battery, and determining the first charge to be adjusted of the target battery according to the first voltage to be adjusted and the charge-to-voltage ratio; the charge-to-voltage ratio is the charge required to be charged or discharged when the voltage change of the battery is 1V; Acquire a first current corresponding to the target battery during charging or discharging, and determine a first duration of charging or discharging corresponding to the target battery according to a first charge amount to be adjusted of the target battery and the first current; The target battery is controlled to be charged or discharged according to the first current and the first duration.

2. The method for regulating the open circuit voltage of a battery according to claim 1, characterized in that: After each completion of the voltage regulation process, determining again whether the adjusted open circuit voltage of the target battery reaches the target open circuit voltage, if so, ending the voltage regulation; if not, returning to the voltage regulation process until the adjusted open circuit voltage of the target battery reaches the target open circuit voltage; If the difference between the current open circuit voltage and the target open circuit voltage is less than a preset target difference, it is determined that the adjusted open circuit voltage of the target battery reaches the target open circuit voltage; wherein the target difference is 1uV to 500uV.

3. The method for regulating the open circuit voltage of a battery according to claim 1 or 2, characterized in that: After each voltage regulation process is completed, the target battery is left to stand for a second period of time; The second time period of standing still after the next voltage regulation process is completed is shorter than the time period of standing still after the last voltage regulation process is completed.

4. The method for regulating the open circuit voltage of a battery according to claim 1 or 2, characterized in that: Also includes: After the target battery is left to stand for a second period of time, determining whether the current open circuit voltage of the target battery reaches the target open circuit voltage, and if not, determining a second voltage to be adjusted corresponding to the target battery according to the current open circuit voltage and the target open circuit voltage; Determining a second charge to be adjusted of the target battery according to the second voltage to be adjusted and the charge-to-voltage ratio; Acquire a second current corresponding to the target battery during charging or discharging, and determine a third duration corresponding to the charging or discharging of the target battery according to the first charge to be adjusted of the target battery and the second current; Controlling the target battery to charge or discharge according to the second current and the third duration; Wherein, a current value of the second current is smaller than a current value of the first current.

5. The method for regulating the open circuit voltage of a battery according to claim 4, characterized in that: After the last charge or discharge is completed, if it is determined that the current open circuit voltage of the target battery does not reach the target open circuit voltage, then obtaining the voltage change amount and the charge amount of the target battery in the last adjustment process; Recalculate the power-to-voltage ratio and update the power-to-voltage ratio according to the voltage change of the target battery and the charge amount of charging or discharging in the last adjustment process; A second charge to be adjusted of the target battery is determined according to the second voltage to be adjusted and the updated charge-to-voltage ratio.

6. The method for regulating the open circuit voltage of a battery according to claim 5, characterized in that: The first current and / or the second current is a ramp current with a decreasing current value.

7. The method for regulating the open circuit voltage of a battery according to claim 1 or 2, characterized in that: The first current and / or the second current is an alternating current whose current value alternates between positive and negative values; wherein the target battery is charged when the current value is positive, and the target battery is discharged when the current value is negative.

8. A method for batch regulating battery open circuit voltage, characterized in that: include: Select any battery to be adjusted as a reference battery, and obtain the charge-to-voltage ratio of the reference battery; the charge-to-voltage ratio is the amount of charge that needs to be charged or discharged when the voltage change of the battery is 1V; For any target battery in the batch of batteries, determine whether the current open circuit voltage of the target battery reaches a preset target open circuit voltage, and if not, perform at least one voltage regulation process on the target battery; Wherein, the voltage regulation process includes: Determine a first voltage to be adjusted corresponding to the target battery according to the current open circuit voltage and the target open circuit voltage; Determining a first charge to be adjusted of the target battery according to the first voltage to be adjusted and the charge-to-voltage ratio; Acquire a first current corresponding to the target battery during charging or discharging, and determine a first duration of charging or discharging corresponding to the target battery according to a first charge amount to be adjusted of the target battery and the first current; The target battery is controlled to be charged or discharged according to the first current and the first duration.

9. A battery open circuit voltage regulating device, characterized in that: It comprises a memory and a processor, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement the steps of the battery open circuit voltage regulation method as described in any one of claims 1 to 7; or, the processor is used to execute the computer program to implement the steps of the battery open circuit voltage batch regulation method as described in claim 8.

10. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the method for regulating the open circuit voltage of a battery as claimed in any one of claims 1 to 7 is implemented; or the steps of the method for batch regulating the open circuit voltage of a battery as claimed in claim 8 are implemented.

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