Battery open-circuit voltage regulation method and regulation apparatus, and storage medium
By using a battery open-circuit voltage regulation method, voltage regulation is converted into charge regulation. By controlling charging and discharging using current and time, the problem of insufficient accuracy in battery open-circuit voltage regulation in existing technologies is solved, and high-precision regulation at the μV level is achieved.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- VTA TECHNOLOGY PTE LTD
- Filing Date
- 2024-12-31
- Publication Date
- 2026-05-21
Smart Images
Figure CN2024144428_21052026_PF_FP_ABST
Abstract
Description
Battery open-circuit voltage regulation method, regulation device and storage medium
[0001] This application claims priority to Chinese Patent Application No. 202411623010.0, filed on November 14, 2024, entitled "Method, Device and Storage Medium for Regulating Open Circuit Voltage of Battery", the entire contents of which are incorporated herein by reference. Technical Field
[0002] This application relates to the field of battery technology, and in particular to a method, device and storage medium for regulating the open-circuit voltage of a battery. Background Technology
[0003] In the battery field, some battery testing and application scenarios require extremely high consistency of the open circuit voltage (OCV) of multiple batteries. For example, the difference in open circuit voltage of multiple batteries needs to reach the μV level, which requires precise adjustment of the open circuit voltage.
[0004] To regulate the open-circuit voltage of multiple batteries, related technologies first charge them with a constant current signal to a first voltage value, then switch to a constant voltage charging stage. After a period of rest, the batteries are then discharged with a constant current until they reach a voltage limit, followed by another rest period. Then, a constant voltage and constant current signal is used to charge the batteries, and finally, the process is repeated to complete the open-circuit voltage regulation. While this method can regulate the open-circuit voltage to some extent, the accuracy is poor, typically only at the mV level. This makes it unsuitable for scenarios requiring high open-circuit voltage accuracy. Therefore, the open-circuit voltage regulation method in these technologies still has room for improvement. Summary of the Invention
[0005] This application provides a battery open-circuit voltage regulation method, regulation device, and storage medium to solve the technical problem of poor regulation accuracy in related technologies.
[0006] In a first aspect, this application provides a method for regulating the open-circuit voltage of a battery, the method comprising:
[0007] Obtain the current open-circuit voltage of the target battery;
[0008] 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 adjustment process on the target battery.
[0009] The voltage regulation process includes:
[0010] The first adjustable voltage corresponding to the target battery is determined based on the current open-circuit voltage and the target open-circuit voltage;
[0011] Obtain the charge-to-voltage ratio of the target battery, and determine the first charge amount to be adjusted of the target battery based on the first voltage to be adjusted and the charge-to-voltage ratio; the charge-to-voltage ratio is the amount of charge that needs to be charged or discharged when the battery voltage change is 1V;
[0012] Obtain the first current during charging or discharging of the target battery, and determine the first charging or discharging duration of the target battery based on the first adjustable charge amount of the target battery and the first current;
[0013] The target battery is controlled to charge or discharge based on the first current and the first duration.
[0014] In one possible design, after each voltage regulation process is completed, it is determined again whether the regulated open-circuit voltage of the target battery has reached the target open-circuit voltage. If yes, the voltage regulation ends; if not, the voltage regulation process returns until the regulated open-circuit voltage of the target battery reaches the target open-circuit voltage.
[0015] If the difference between the current open-circuit voltage and the target open-circuit voltage is less than a preset target difference, then the adjusted open-circuit voltage of the target battery is determined to have reached the target open-circuit voltage; wherein the target difference is 1uV to 500uV.
[0016] In one possible design, after each voltage regulation process is completed, the target battery is left to rest for a second period of time.
[0017] The second settling time after the next voltage regulation process is completed is shorter than the settling time after the previous voltage regulation process is completed.
[0018] In one possible design, the battery open-circuit voltage regulation method further includes:
[0019] After the target battery is left to stand for a second period of time, it is determined whether the current open circuit voltage of the target battery reaches the target open circuit voltage. If not, the second voltage to be adjusted for the target battery is determined based on the current open circuit voltage and the target open circuit voltage.
[0020] The second charge quantity to be adjusted of the target battery is determined based on the second voltage to be adjusted and the charge-to-voltage ratio.
[0021] Obtain the second current corresponding to the target battery during charging or discharging, and determine the third duration of charging or discharging corresponding to the target battery based on the first adjustable charge amount of the target battery and the second current;
[0022] Based on the second current and the third duration, the target battery is controlled to charge or discharge.
[0023] The value of the second current is less than the value of the first current.
[0024] In one possible design, the battery open-circuit voltage regulation method further includes, after the previous charging or discharging cycle has ended, if it is determined that the current open-circuit voltage of the target battery has not reached the target open-circuit voltage, then obtaining the voltage change of the target battery and the charge amount during the previous regulation process.
[0025] Based on the voltage change of the target battery and the amount of charge or discharge in the previous adjustment process, the charge-to-voltage ratio is recalculated and updated.
[0026] The second regulated charge of the target battery is determined based on the second regulated voltage and the updated charge-to-voltage ratio.
[0027] In one possible design, the battery open-circuit voltage regulation method further includes the first current and / or the second current being a ramp current with decreasing current values.
[0028] In one possible design, the first current and / or the second current are alternating currents with alternating positive and negative values, wherein the target battery is charged when the current value is positive and discharged when the current value is negative.
[0029] In one possible design, the battery open-circuit voltage regulation method further includes controlling the target battery to discharge when the current open-circuit voltage of the target battery is greater than the target open-circuit voltage;
[0030] 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.
[0031] Secondly, this application also provides a method for batch adjustment of battery open-circuit voltage, the method comprising:
[0032] 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.
[0033] For any target battery in the batch of batteries, 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 adjustment process on the target battery.
[0034] The voltage regulation process includes:
[0035] The first adjustable voltage corresponding to the target battery is determined based on the current open-circuit voltage and the target open-circuit voltage;
[0036] The first regulated charge of the target battery is determined based on the first adjustable voltage and the charge-to-voltage ratio.
[0037] Obtain the first current during charging or discharging of the target battery, and determine the first charging or discharging duration of the target battery based on the first adjustable charge amount of the target battery and the first current;
[0038] The target battery is controlled to charge or discharge based on the first current and the first duration.
[0039] Thirdly, this application also provides a battery open-circuit voltage regulation device, including a memory and a processor. The memory stores a stored 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 above; 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 above.
[0040] Fourthly, this application also provides a storage medium storing a computer program, which, 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.
[0041] According to the battery open-circuit voltage regulation method provided in the first aspect above, the current open-circuit voltage of the target battery is first obtained; then, it is determined whether the current open-circuit voltage of the target battery reaches the preset target open-circuit voltage. If not, the target battery is subjected to at least one voltage regulation process. The single voltage regulation process includes: determining the first voltage to be regulated corresponding to the target battery based on 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 regulated of the target battery based on the first voltage to be regulated and the charge-to-voltage ratio; obtaining the first current during charging or discharging of the target battery, and determining the first charging or discharging duration of the target battery based on the first charge to be regulated and the first current; and controlling the target battery to charge or discharge based on the first current and the first duration. It can be seen that this application converts the regulation of the battery's open-circuit voltage into the regulation of the charge during charging or discharging. By controlling the charging / discharging current and charging / discharging time, the battery's open-circuit voltage can be regulated to the target open-circuit voltage, and the accuracy of the open-circuit voltage regulation can be guaranteed to reach the μV level, so that the battery can be used in scenarios with high requirements for the accuracy of the battery's open-circuit voltage.
[0042] The beneficial effects provided by the other aspects and the various possible designs of the other aspects can be found in the beneficial effects of the first aspect and the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description
[0043] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these accompanying drawings.
[0044] Figure 1 is a schematic flowchart of the battery open-circuit voltage regulation method provided in an embodiment of this application;
[0045] Figure 2 is a schematic diagram of the primary voltage regulation process provided in an embodiment of this application;
[0046] Figure 3 is a flowchart of the battery open-circuit voltage batch adjustment method provided in this embodiment;
[0047] Figure 4 is a schematic diagram of the voltage adjustment process for any one battery in a batch of batteries in an embodiment of this application;
[0048] Figure 5 is a schematic diagram of the battery open-circuit voltage regulation device provided in the embodiment of this application. Detailed Implementation
[0049] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c alone can mean: a alone, b alone, c alone, a combination of a and b, a combination of a and c, a combination of b and c, or a, b, and c, where a, b, and c can be single or multiple.
[0050] Hereinafter, 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this embodiment, unless otherwise stated, "a plurality of" means two or more.
[0051] To achieve precise regulation of the battery's open-circuit voltage, related technologies typically use a constant voltage and constant current sampling method to charge and discharge the battery, followed by a period of rest to ensure consistency in the open-circuit voltage of multiple batteries. While this method can regulate the battery's open-circuit voltage to some extent, the regulation accuracy is low. Currently, the regulation methods provided by related technologies can only regulate the battery's open-circuit voltage to the mV level. Due to the low regulation accuracy, it cannot be used in scenarios where high precision of battery voltage is required.
[0052] To overcome the shortcomings of the aforementioned related technologies, this application provides a method for regulating the open-circuit voltage of a battery. The inventive concept of this method is as follows: based on the relationship between the open-circuit voltage of the battery and the change in 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 in the battery. In this way, the amount of charge in the battery is regulated by charging and discharging, thereby achieving the purpose of regulating the open-circuit voltage of the battery.
[0053] Specifically, to achieve the above-mentioned inventive concept, this 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; if not, performs at least one voltage adjustment process on the target battery. In each voltage adjustment process, firstly, a first voltage to be adjusted corresponding to the target battery is determined based on the current open-circuit voltage and the target open-circuit voltage; then, the charge-to-voltage ratio of the target battery is obtained; and a first charge to be adjusted of the target battery is determined based on the first voltage to be adjusted and the charge-to-voltage ratio. The charge-to-voltage ratio is the amount of charge required to charge or discharge the battery when the voltage change is 1V. A first current is obtained for charging or discharging the target battery; and a first charging or discharging duration is determined based on the first charge to be adjusted and the first current. Based on the first current and the first duration, the target battery is controlled to charge or discharge. In this way, the open-circuit voltage of the battery can be adjusted to the target open-circuit voltage through one or more voltage adjustment processes, and the adjustment accuracy can reach the μV level, enabling the battery to be used in scenarios where high accuracy of the battery's open-circuit voltage is required.
[0054] It is understood that the battery open-circuit voltage regulation method provided in this application can regulate the open-circuit voltage of one battery at the same time, or it can regulate the open-circuit voltage of multiple batteries at the same time. The following embodiments take regulating the open-circuit voltage of one battery as an example to further illustrate the battery open-circuit voltage regulation method of this application.
[0055] Figure 1 is a schematic flowchart of a battery open-circuit voltage regulation method provided in an embodiment of this application. As shown in Figure 1, the battery open-circuit voltage regulation method includes:
[0056] S101. Obtain the current open-circuit voltage of the target battery.
[0057] In some embodiments, the battery that requires open-circuit voltage regulation can be used as the target battery. A voltmeter can be placed between the two poles of the target battery. In this way, the target battery can be regarded as having a voltmeter connected at the open circuit. The voltmeter reading is the open-circuit voltage of the target battery.
[0058] S102. Determine whether the current open-circuit voltage of the target battery has reached the preset target open-circuit voltage. If not, perform at least one voltage adjustment process on the target battery.
[0059] 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 has not reached the preset target open-circuit voltage, and the target battery needs to be regulated at least once.
[0060] The number of voltage regulation cycles performed on the target battery can be determined based on the required accuracy and the results of the regulation. For example, if a high accuracy is required for the open-circuit voltage of the target battery, two or three voltage regulation cycles can be performed to cyclically adjust the battery's open-circuit voltage, thereby achieving higher regulation accuracy. In some embodiments, if after one regulation cycle, a difference is still detected between the battery's open-circuit voltage and the target open-circuit voltage, one or two more voltage regulation cycles can be performed to bring the battery's open-circuit voltage to the target open-circuit voltage.
[0061] Figure 2 is a schematic diagram of the primary voltage regulation process provided in an embodiment of this application. As shown in Figure 2, the primary voltage regulation process in this embodiment includes:
[0062] S201. Determine the first adjustable voltage corresponding to the target battery based on the current open circuit voltage and the target open circuit voltage.
[0063] In one embodiment, the first voltage to be adjusted corresponding to the target battery can be determined based on 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.
[0064] It is understandable 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 positive, which indicates that the 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 negative, which indicates that the target battery needs to be charged.
[0065] S202. Obtain the charge-to-voltage ratio of the target battery, and determine the first charge amount to be adjusted of the target battery based on the first voltage to be adjusted and the charge-to-voltage ratio; the charge-to-voltage ratio is the amount of charge that needs to be charged or discharged when the battery voltage change is 1V.
[0066] In some embodiments, before adjusting the open-circuit voltage of the target battery, the change in open-circuit voltage and the change in charge of the target battery can be recorded during the charging or discharging process. Then, the charge-to-voltage ratio can be calculated based on the change in open-circuit voltage and the change in charge.
[0067] In some embodiments, the charge-to-voltage ratio can be obtained by looking up a table before adjusting the open-circuit voltage of the target battery.
[0068] As described above, the charge-to-voltage ratio of a target battery represents the amount of charge required to charge or discharge the battery when its voltage changes by 1V. 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.
[0069] Based on the obtained charge-to-voltage ratio of the target battery and the first voltage to be adjusted, the first amount of charge to be adjusted that the target battery needs to be calculated can be obtained by multiplying the first voltage to be adjusted by the charge-to-voltage ratio.
[0070] S203. Obtain the first current during charging or discharging of the target battery, and determine the first charging or discharging duration of the target battery based on the first adjustable charge and the first current of the target battery.
[0071] In some embodiments, after obtaining the first amount of charge to be adjusted for the target battery, the first charging or discharging duration corresponding to the target battery can be determined based on a preset first charging or discharging current for the target battery. Specifically, the first charging or discharging duration can be obtained by dividing the first amount of charge to be adjusted by the first current.
[0072] S204. Based on the first current and the first duration, control the target battery to charge or discharge.
[0073] Specifically, the target battery is charged or discharged using a first current, and the charging or discharging time is the calculated first time, which can adjust the open-circuit voltage of the target battery to the target open-circuit voltage.
[0074] As can be seen, according to the battery open-circuit voltage adjustment method provided in this embodiment, the charge-to-voltage ratio of the target battery can be obtained based on the characteristics of the battery, and then the open-circuit voltage adjustment is converted into the charge adjustment of the battery. In turn, the open-circuit voltage of the target battery is adjusted to the target open-circuit voltage by charging and discharging the target battery, and the adjustment accuracy can reach the μV level, resulting in high adjustment accuracy.
[0075] In some embodiments, after each voltage regulation process, it is determined again whether the regulated open-circuit voltage of the target battery has reached the target open-circuit voltage. If yes, the voltage regulation ends; otherwise, the voltage regulation process returns until the regulated open-circuit voltage of the target battery reaches the target open-circuit voltage. For example, for battery A, after the first voltage regulation process, if it is determined that there is still a slight difference between the open-circuit voltage of battery A and the target open-circuit voltage, a second voltage regulation process can be controlled to make the open-circuit voltage of battery A reach the target open-circuit voltage.
[0076] If the difference between the current open-circuit voltage and the target open-circuit voltage is less than the preset target difference, then the target battery's adjusted open-circuit voltage is determined to have reached the target open-circuit voltage; the target difference can be set to any value between 1uV and 500uV.
[0077] For example, the target difference can be set to 100uV. That is, when the difference between the current open-circuit voltage and the target open-circuit voltage is less than 100uV, the target battery's adjusted open-circuit voltage is determined to reach the target open-circuit voltage.
[0078] Understandably, the smaller the target difference setting, the higher the accuracy of the open-circuit voltage of the adjusted battery when the adjusted open-circuit voltage reaches the target open-circuit voltage.
[0079] It should be noted that for batteries requiring multiple adjustments, the charging / discharging current used in each subsequent adjustment cycle is less than that in the previous adjustment. Since the battery's open-circuit voltage gets closer to the target open-circuit voltage with each adjustment, using a smaller charging / discharging current in each subsequent adjustment cycle improves adjustment accuracy and ensures the battery's open-circuit voltage reaches the target voltage.
[0080] It should be noted that after each voltage regulation cycle, the target battery is allowed to rest for a second period of time to allow for depolarization. The second resting period after each subsequent voltage regulation cycle is shorter than the resting period after the previous cycle. Since subsequent cycles use smaller current values, resulting in less polarization, the required resting time gradually decreases. For example, after the first voltage regulation cycle, the target battery is allowed to rest for 30 minutes; after the second cycle, it is allowed to rest for 20 minutes, with the resting time decreasing sequentially to improve voltage regulation efficiency.
[0081] In some embodiments, for example, if the target battery needs to undergo two voltage adjustments, after the first voltage adjustment is completed and the target battery is left to rest for a second duration, it is determined whether the current open-circuit voltage of the target battery has reached the target open-circuit voltage. If not, a second voltage to be adjusted is determined based on the current open-circuit voltage and the target open-circuit voltage; a second charge to be adjusted is determined based on the second voltage to be adjusted and the charge-to-voltage ratio; a second current is acquired for charging or discharging the target battery; a third duration for charging or discharging the target battery is determined based on the first charge to be adjusted and the second current; and the target battery is controlled to charge or discharge based on the second current and the third duration; wherein the value of the second current is less than the value of the first current. Thus, through two voltage adjustment processes, the open-circuit voltage of the battery reaches the target open-circuit voltage.
[0082] 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 enabling the battery's open-circuit voltage to be accurately adjusted to the target open-circuit voltage.
[0083] In some embodiments, after the previous charging or discharging cycle ends, 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 and the charge amount during the previous adjustment process are obtained; the charge-to-voltage ratio is recalculated and updated based on the voltage change of the target battery and the charge amount during the previous adjustment process; and the second charge amount to be adjusted of the target battery is determined based on the second voltage to be adjusted and the updated charge-to-voltage ratio.
[0084] In some embodiments, the first current and the second current can be fixed current values, that is, the amount of charge in the battery can be adjusted by constant current charging or discharging.
[0085] In another embodiment, the first and second currents can be set as decreasing ramp currents, so that the current values gradually decrease as the charging and discharging time progresses. The larger current value at the initial moment ensures rapid charging and discharging, thereby improving the adjustment speed; the smaller current value near the end of the adjustment process ensures the accuracy of the adjustment.
[0086] It is understandable that when the first or second current is a decreasing ramp current, the amount of charge during the adjustment process is also the integral of the current over time. In practical applications, technicians can choose to use constant current charging and discharging or set the current to a decreasing ramp current, depending on the requirements; no restrictions are imposed here.
[0087] In some embodiments, the first current and the second current can be alternating current values that alternate between positive and negative. That is, when the current value is positive, the battery is charged, and when the current value is negative, the target battery is discharged, thereby realizing the charging and discharging cycle of the target battery and adjusting the charge of the target battery.
[0088] For example, in one embodiment, during a single charge cycle, the battery is cyclically charged and discharged, only needing to ultimately satisfy the charge required for charging or discharging. Specifically, for example, discharging for 0-10 seconds, charging for 10-20 seconds, discharging for 20-30 seconds, and charging for 30-40 seconds, repeating this cycle for a total time of 200 seconds; the discharge current is greater than the charging current, causing the battery to discharge the required amount of charge, thus completing the open-circuit voltage adjustment. Alternatively, for example, discharging for 0-20 seconds, charging for 20-30 seconds, discharging for 30-50 seconds, and charging for 50-60 seconds, repeating this cycle for a total time of 300 seconds; the discharge current equals the charging current, with each cycle discharging for an additional 10 seconds, causing the battery to discharge the required amount of charge, thus completing the open-circuit voltage adjustment. Furthermore, the frequency can be increased, with discharging for 0-10 ms, charging for 10-20 ms, discharging for 20-30 ms, and charging for 30-40 ms, repeating this cycle for a total time of 200 seconds. Alternatively, a current value with a certain waveform can be used, where the current value = 2*sin(10*time) + 0.5. Each cycle charges a certain amount of electricity. By controlling the total duration, the battery can be charged to the required amount of charge, thereby completing the open-circuit voltage adjustment.
[0089] It is 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; 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. In this embodiment, charging and discharging refer to the integrated results.
[0090] The following describes the battery open-circuit voltage adjustment method of this application using batch batteries as an example. This battery open-circuit voltage adjustment method can adjust the open-circuit voltage of multiple batteries so that the open-circuit voltage of multiple batteries reaches consistency.
[0091] Figure 3 is a flowchart of the battery open-circuit voltage batch adjustment method provided in this embodiment. As shown in Figure 3, the battery open-circuit voltage batch adjustment method includes:
[0092] 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 battery voltage changes by 1V.
[0093] Understandably, for a batch of batteries, the parameters of 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 the basis for adjusting the charge of other batteries in the batch. This eliminates the need to obtain the charge-to-voltage ratio of each battery, which can improve the efficiency of adjusting the open-circuit voltage of the batch of batteries.
[0094] S302. For any target battery in the batch of batteries, 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 adjustment process on the target battery.
[0095] In other words, for each battery in the batch that does not meet the target open-circuit voltage, at least one voltage regulation process is performed so that the open-circuit voltage of each battery in the batch reaches the target open-circuit voltage.
[0096] Figure 4 is a schematic diagram of the voltage regulation process for any one battery in a batch of batteries in an embodiment of this application. As shown in Figure 4, the voltage regulation process includes:
[0097] S401. Determine the first voltage to be adjusted corresponding to the target battery based on the current open circuit voltage and the target open circuit voltage.
[0098] S402. Determine the first regulated charge of the target battery based on the first regulated voltage and the charge-to-voltage ratio.
[0099] S403. Obtain the first current during charging or discharging of the target battery, and determine the first charging or discharging duration of the target battery based on the first adjustable charge and the first current of the target battery.
[0100] S404. Based on the first current and the first duration, control the target battery to charge or discharge.
[0101] In some embodiments, after each voltage regulation process is completed, it is determined again whether the regulated open-circuit voltage of the target battery has reached the target open-circuit voltage. If yes, the voltage regulation ends; if no, the voltage regulation process returns until the regulated open-circuit voltage of the target battery reaches the target open-circuit voltage.
[0102] For batteries that require multiple adjustments, the charging and discharging current used in each subsequent adjustment cycle is less than that in the previous adjustment. Since the battery's open-circuit voltage gets closer to the target open-circuit voltage with each adjustment, using a smaller charging and discharging current in each subsequent adjustment cycle improves adjustment accuracy and ensures the battery's open-circuit voltage reaches the target voltage.
[0103] It should be noted that after each voltage regulation cycle is completed, the target battery is left to rest for a second period of time to allow it to depolarize. The second resting period after each subsequent voltage regulation cycle is shorter than the resting period after the previous cycle. Since subsequent cycles use smaller current values, resulting in less polarization, the required resting time gradually decreases.
[0104] 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 enabling the battery's open-circuit voltage to be accurately adjusted to the target open-circuit voltage.
[0105] In some embodiments, the first current and the second current can be fixed current values, i.e., the battery charge is adjusted by constant current charging or discharging. In another embodiment, the first current and the second current can be set as a decreasing ramp current, so that the current value gradually decreases as the charging and discharging time progresses. The current value is larger at the initial moment to ensure rapid charging and discharging, thereby improving the adjustment speed, while the current value is smaller near the end of the adjustment to ensure the accuracy of the adjustment.
[0106] It is understood that the method for adjusting the open-circuit voltage of a single battery in the above embodiments is also applicable to the open-circuit voltage adjustment process of batch batteries in this embodiment, and has the same technical effect, so it will not be described again here.
[0107] The following provides a battery open-circuit voltage regulating device, which corresponds to the voltage regulating method described above, and will not be repeated here.
[0108] Figure 5 is a schematic diagram of the battery open-circuit voltage regulating device provided in the embodiment of this application. As shown in Figure 5, this embodiment provides a battery open-circuit voltage regulating device including a memory 501 and a processor 502. The memory 501 stores a stored 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.
[0109] This embodiment provides a storage medium storing a computer program. When the computer program is executed by a processor, it implements the steps of the battery open-circuit voltage regulation method provided in the above embodiment; or it implements the steps of the battery open-circuit voltage batch regulation method provided in the above embodiment.
[0110] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.
[0111] 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 the present invention, 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) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.
[0112] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.
Claims
1. A method of regulating open circuit voltage of a battery, characterized by, include: Obtain the current open-circuit voltage of the target battery; 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 adjustment process on the target battery. The voltage regulation process includes: The first adjustable voltage corresponding to the target battery is determined based on the current open-circuit voltage and the target open-circuit voltage; Obtain the charge-to-voltage ratio of the target battery, and determine the first charge amount to be adjusted of the target battery based on the first voltage to be adjusted and the charge-to-voltage ratio; the charge-to-voltage ratio is the amount of charge that needs to be charged or discharged when the battery voltage change is 1V; Obtain the first current during charging or discharging of the target battery, and determine the first charging or discharging duration of the target battery based on the first adjustable charge amount of the target battery and the first current; The target battery is controlled to charge or discharge based on the first current and the first duration.
2. The battery open-circuit voltage adjustment method of claim 1, wherein, After each voltage regulation process is completed, it is determined again whether the adjusted open-circuit voltage of the target battery has reached the target open-circuit voltage. If yes, the voltage regulation ends; if no, the voltage regulation process is returned 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, then the target battery's adjusted open-circuit voltage is determined to have reached the target open-circuit voltage; wherein the target difference is 1uV to 500uV.
3. The battery open-circuit voltage adjusting method according to claim 1 or 2, characterized by, After each voltage regulation process is completed, the target battery is left to stand for a second period of time. The second settling time after the next voltage regulation process is completed is shorter than the settling time after the previous voltage regulation process is completed.
4. The battery open-circuit voltage adjusting method according to claim 1 or 2, characterized by, Also includes: After the target battery is left to stand for a second period of time, it is determined whether the current open circuit voltage of the target battery reaches the target open circuit voltage. If not, the second voltage to be adjusted for the target battery is determined based on the current open circuit voltage and the target open circuit voltage. The second charge quantity to be adjusted of the target battery is determined based on the second voltage to be adjusted and the charge-to-voltage ratio. Obtain the second current corresponding to the target battery during charging or discharging, and determine the third duration of charging or discharging corresponding to the target battery based on the first adjustable charge amount of the target battery and the second current; Based on the second current and the third duration, the target battery is controlled to charge or discharge. The value of the second current is less than the value of the first current.
5. The battery open-circuit voltage adjustment method of claim 4, wherein, After the previous charging or discharging cycle ends, if it is determined that the current open-circuit voltage of the target battery has not reached the target open-circuit voltage, then the voltage change of the target battery and the amount of charge charged or discharged in the previous adjustment process are obtained. Based on the voltage change of the target battery and the amount of charge or discharge in the previous adjustment process, the charge-to-voltage ratio is recalculated and updated. The second regulated charge of the target battery is determined based on the second regulated voltage and the updated charge-to-voltage ratio.
6. The battery open-circuit voltage adjustment method of claim 5, wherein, The first current and / or the second current are ramp currents with decreasing current values.
7. The battery open-circuit voltage adjusting method according to claim 1 or 2, characterized by, The first current and / or the second current are alternating currents with alternating positive and negative values; wherein the target battery is charged when the current value is positive and discharged when the current value is negative.
8. A method of bulk adjustment of open circuit voltage of a battery, characterized by, 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 the preset target open circuit voltage. If not, perform at least one voltage adjustment process on the target battery. The voltage regulation process includes: The first adjustable voltage corresponding to the target battery is determined based on the current open-circuit voltage and the target open-circuit voltage; The first regulated charge of the target battery is determined based on the first regulated voltage and the charge-to-voltage ratio. Obtain the first current during charging or discharging of the target battery, and determine the first charging or discharging duration of the target battery based on the first adjustable charge amount of the target battery and the first current; The target battery is controlled to charge or discharge based on the first current and the first duration.
9. A battery open circuit voltage regulating device, characterized by, The method includes a memory and a processor, wherein the memory stores a stored computer program, and the processor is configured 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 configured 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 by The storage medium stores a computer program, which, when executed by a processor, implements the battery open-circuit voltage regulation method as described in any one of claims 1 to 7; or implements the steps of the battery open-circuit voltage batch regulation method as described in claim 8.