A battery equalization method, system, and vehicle
Patent Information
- Application Number
- CN202511766985.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-08-21
AI Technical Summary
[0003]利用拐点均衡法启动均衡保养时，因客观存在的干扰因素，会出现策略无效或过度均衡等问题
[0040]上述说明仅是本公开技术方案的概述，为了能够更清楚了解本公开的技术手段，而可依照说明书的内容予以实施，并且为了让本公开的上述和其它目的、特征和优点能够更明显易懂，以下特举本公开的具体实施方式。
Smart Images
Figure CN122607181A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to a battery balancing method, system, and vehicle. Background Technology
[0002] In related technologies, characteristic inflection points (the points where voltage changes the fastest) can be found by analyzing the differential of the voltage-capacity curve during battery charging, and cell alignment can be performed based on these inflection points, i.e., inflection point balancing. Inflection point balancing requires a low-current mode, so current reduction processing of the battery is needed during charging to find the inflection point.
[0003] When using the inflection point balancing method to initiate balancing maintenance, problems such as strategy ineffectiveness or over-balancing may occur due to objective interference factors. Summary of the Invention
[0004] This disclosure provides a battery balancing method, system, and vehicle to at least partially solve the above-mentioned problems.
[0005] The first aspect of this disclosure provides a battery balancing method, comprising:
[0006] When the current reduction charging identification characteristic inflection point is reached, if interference is confirmed, at least one of the following controls will be implemented:
[0007] The current reduction charging is stopped based on the remaining time of the current reduction charging;
[0008] The system controls whether to continue or stop current reduction charging based on the number of characteristic inflection points identified before the interference occurs.
[0009] In some embodiments, controlling the cessation of slash charging based on the remaining time of slash charging includes: controlling the cessation of slash charging when it is determined that a characteristic inflection point cannot be identified within the remaining time of slash charging.
[0010] In some embodiments, if interference is confirmed, the following controls are implemented:
[0011] If, during the remaining time of the current-reducing charging period, it is determined that no characteristic inflection point can be identified, the current-reducing charging is stopped; and / or
[0012] If a characteristic inflection point can be identified during the remaining time of the current reduction charging, the following control measures are implemented:
[0013] If no characteristic inflection point is identified before the interference occurs, control continues to reduce current charging; and / or
[0014] When at least one characteristic inflection point is identified before the interference occurs, the current reduction charging is stopped.
[0015] In some embodiments, controlling continued current reduction charging when no characteristic inflection point is identified before the interference occurs includes: taking the moment when the interference occurs as the start moment of current reduction charging and controlling continued current reduction charging when no characteristic inflection point is identified before the interference occurs.
[0016] In some embodiments, the type of interference includes at least one of the following: current fluctuation, voltage fluctuation, sampling disconnection, temperature anomaly, and thermal management activation.
[0017] In some embodiments, the current fluctuation is determined based on the current fluctuation value; and / or
[0018] The voltage fluctuation is determined based on the voltage fluctuation value; and / or
[0019] The sampling disconnection is determined based on the disconnection signal; and / or
[0020] The temperature anomaly was determined based on the temperature of the battery pack.
[0021] In some embodiments, the current fluctuation is determined based on the fact that the maximum difference between three consecutive detected current values is greater than or equal to a first current value; and / or
[0022] The voltage fluctuation is determined based on two consecutive detected voltage readings indicating a voltage drop; and / or
[0023] The sampling disconnection is determined based on the duration of the current sampling disconnection signal for a first duration and / or the duration of the voltage sampling disconnection signal for a second duration; and / or
[0024] The temperature anomaly is determined based on the battery pack temperature being greater than a first temperature or the battery pack temperature being lower than a second temperature.
[0025] In some embodiments, the method further includes controlling battery balancing based on identified feature inflection points.
[0026] In some embodiments, controlling battery equalization based on identified feature inflection points includes controlling battery equalization based on at least one feature inflection point identified before the interference occurs.
[0027] In some embodiments, controlling battery equalization based on at least one characteristic inflection point identified before the interference occurs includes:
[0028] When the identified feature inflection points include the feature inflection point of the battery cell with the highest voltage but not the feature inflection point of the battery cell with the lowest voltage, control all battery cells with identified feature inflection points to be equalized to a first equalization point. The first equalization point is the point where the interference occurred or the point corresponding to the capacity value at the point where the interference occurred minus the first capacity value; and / or
[0029] When the identified feature inflection point includes the feature inflection point of the battery cell with the lowest voltage but does not include the feature inflection point of the battery cell with the highest voltage, control all battery cells whose feature inflection points have not been identified to be equalized from the first point to the second equalization point. The first point is the point when the interference occurs, and the second equalization point is the feature inflection point of the battery cell with the lowest voltage.
[0030] In some embodiments, the method further includes:
[0031] When the identified characteristic inflection points include the characteristic inflection point of the battery cell with the highest voltage but not the characteristic inflection point of the battery cell with the lowest voltage, control the imbalance of all battery cells whose characteristic inflection points were not identified; and / or
[0032] When the identified characteristic inflection point includes the characteristic inflection point of the battery cell with the lowest voltage but not the characteristic inflection point of the battery cell with the highest voltage, control all battery cells with identified characteristic inflection points to be balanced from the characteristic inflection point to the second balance point.
[0033] In some embodiments, the first capacity value is 4%-7% of the battery capacity.
[0034] The battery balancing method provided in this disclosure can control the stopping of current reduction charging based on the remaining time of current reduction charging when interference is confirmed, so as to avoid ineffective current reduction; it can also control the continuation or cessation of current reduction charging based on the number of characteristic inflection points identified before the interference occurs, so as to avoid over-balancing and thereby improve the accuracy and reliability of battery balancing.
[0035] This disclosure also provides a battery balancing system, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any of the methods described above.
[0036] This disclosure also provides an electrical device including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any of the methods described above.
[0037] This disclosure also provides a computer-readable storage medium having a computer program / instructions stored thereon, which, when executed by a processor, implement the steps of any of the methods described above.
[0038] This disclosure also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of any of the methods described above.
[0039] This disclosure also provides a vehicle that includes the battery balancing system described in any of the preceding claims.
[0040] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below. Attached Figure Description
[0041] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this disclosure. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.
[0042] To gain a more complete understanding of this disclosure and its beneficial effects, the following description will be made in conjunction with the accompanying drawings, wherein the same reference numerals denote the same parts in the following description.
[0043] Figure 1 This is a flowchart illustrating a battery balancing method according to some embodiments;
[0044] Figure 2 This is a schematic diagram of an equalization strategy when interference occurs in a related technology.
[0045] Figure 3 This is a schematic diagram of an equalization strategy when interference occurs in another related technology.
[0046] Figure 4 This is a flowchart illustrating a battery balancing method according to some other embodiments;
[0047] Figure 5 This is a schematic diagram of an equalization strategy when interference occurs according to some embodiments;
[0048] Figure 6 This is a schematic diagram of the equalization strategy when interference occurs according to some other embodiments. Detailed Implementation
[0049] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the protection scope of this disclosure.
[0050] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.
[0051] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.
[0052] Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following related objects are in an "or" relationship.
[0053] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "electrical connection," and "communication" should be interpreted broadly. For example, they can refer to fixed electrical connections, detachable electrical connections, or integral electrical connections. Connections can be direct or indirect through an intermediate medium, and can be internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.
[0054] In embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in embodiments of this disclosure is not limited. Functions may be performed in the order shown or discussed, or may be performed substantially simultaneously or in reverse order depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
[0055] In this disclosure, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.
[0056] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0057] During actual charging, external interference can cause instability in the charging station, resulting in occasional current fluctuations. These fluctuations occur randomly and can happen during both segmented and full-cycle maintenance, thus affecting the maintenance functionality. For example... Figure 2 As shown, when current fluctuations occur, the processing strategy of relevant technologies does not consider the impact of current fluctuations on equalization. The equalization alignment target is the end of charging (i.e., the moment of full charge). The dotted lines in the figure represent the start and end points of equalization for a certain battery cell. The difference between the two dotted lines corresponds to the capacity of equalization, which can represent the amount of equalization. At this time, there is a risk of over-equalization. Figure 3 As shown, after a current fluctuation occurs, the current continues to be reduced in order to identify the characteristic inflection point. At this time, the effective window width becomes shorter, so even if the current is reduced in the future, the characteristic inflection point cannot be found. This results in the problem of invalid current reduction.
[0058] In some embodiments, such as Figure 1 , 4 As shown in Figure 6, this disclosure provides a battery balancing method, including:
[0059] When the current reduction charging identification characteristic inflection point is reached, if interference is confirmed, at least one of the following controls will be implemented:
[0060] The current reduction charging is stopped based on the remaining time of the current reduction charging;
[0061] The system controls whether to continue or stop current reduction charging based on the number of characteristic inflection points identified before the interference occurs.
[0062] The battery balancing method provided in this disclosure embodiment, such as Figure 6 As shown, when interference is confirmed, the current reduction charging can be stopped based on the remaining time of the current reduction charging to avoid ineffective current reduction; the current reduction charging can be continued or stopped based on the number of characteristic inflection points identified before the interference occurred, such as... Figure 5 As shown, over-balancing can be avoided, thereby improving the accuracy and reliability of battery balancing.
[0063] In the above embodiments, by coordinating the interference identification results with the remaining time of current reduction charging and the historical inflection point status, dynamic intervention of the current reduction strategy is achieved, avoiding ineffective current reduction or over-balancing caused by interference, significantly improving charging efficiency and balancing accuracy, and maintaining high reliability even under complex environmental interference.
[0064] In some embodiments, controlling the shaving charge to stop based on the remaining time of the shaving charge includes: controlling the shaving charge to stop when it is determined that a characteristic inflection point cannot be identified during the remaining time of the shaving charge.
[0065] This strategy is designed based on the correlation between the remaining time window and the success rate of inflection point identification: when the remaining time of the current reduction phase is less than the preset minimum inflection point identification window (e.g., 30 seconds), it can be determined that there is no possibility of a valid inflection point appearing in the current phase, and the current reduction can be terminated immediately to prevent ineffective extension of the charging cycle. This mechanism effectively avoids the energy waste and time loss caused by blindly waiting for the inflection point to appear after interference occurs.
[0066] In some embodiments, such as Figure 4 As shown, if interference is confirmed, the following controls will be implemented:
[0067] If, during the remaining time of the current-reducing charging period, it is determined that no characteristic inflection point can be identified, the current-reducing charging is stopped; and / or
[0068] If a characteristic inflection point can be identified during the remaining time of the current reduction charging, the following control measures are implemented:
[0069] If no characteristic inflection point is identified before the interference occurs, control continues to reduce current charging; and / or
[0070] When at least one characteristic inflection point is identified before the interference occurs, the current reduction charging is stopped.
[0071] If it is determined that the characteristic inflection point cannot be identified within the remaining time of current reduction charging, the current reduction charging can be stopped, that is, the current reduction will no longer be used to identify the characteristic inflection point, thereby avoiding ineffective current reduction and shortening the charging time.
[0072] If a characteristic inflection point can be identified within the remaining time, the current reduction charging will stop when at least one characteristic inflection point is identified, thereby avoiding over-equalization and shortening the charging time. If no characteristic inflection point is identified before the interference, the current reduction will continue to gain opportunities for subsequent inflection point identification and ensure the integrity of the equalization coverage.
[0073] In some embodiments, when no characteristic inflection point is identified before the interference occurs, controlling the continued current reduction charging includes: when no characteristic inflection point is identified before the interference occurs, taking the moment when the interference occurs as the start moment of the current reduction charging and controlling the continued current reduction charging.
[0074] This mechanism eliminates interference contamination of the time window through a "reset time base" strategy: when interference (such as current fluctuation) occurs at the 10th minute and there are no inflection point records before, the system resets the current reduction start time to the 10th minute, recalculates the remaining time window, and ensures that subsequent inflection point identification is based on a clean, interference-free charging phase, avoiding cumulative errors in inflection point determination caused by historical interference data.
[0075] In some embodiments, the type of interference includes at least one of the following: current fluctuation, voltage fluctuation, sampling disconnection, temperature anomaly, and thermal management activation.
[0076] The type of interference can be determined based on the interference situation during the charging process, such as current fluctuations, voltage fluctuations, current sampling disconnection, voltage sampling disconnection, abnormal temperature of the battery pack or individual battery cells, and the activation of thermal management of the battery pack. By identifying interference and further controlling it, the accuracy of battery balancing can be ensured.
[0077] In some embodiments, current fluctuations are determined based on current fluctuation values; and / or
[0078] Voltage fluctuations are determined based on the voltage fluctuation value; and / or
[0079] The sampling disconnection is determined based on the disconnection signal; and / or
[0080] Temperature anomalies are determined based on the temperature of the battery pack.
[0081] The above method can easily and accurately identify the corresponding interference type, thereby ensuring the accuracy of battery balancing.
[0082] In some embodiments, current fluctuations are determined based on the fact that the maximum difference between three consecutive detected current values is greater than or equal to a first current value; and / or
[0083] Voltage fluctuations are determined based on two consecutive detected voltage readings indicating a voltage drop; and / or
[0084] The sampling disconnection is determined based on the duration of the current sampling disconnection signal for a first duration and / or the duration of the voltage sampling disconnection signal for a second duration; and / or
[0085] Temperature anomalies are determined based on whether the battery pack temperature is higher than the first temperature or lower than the second temperature.
[0086] The specific type of interference can be determined through various appropriate methods. The above scheme can easily identify the corresponding type of interference, thereby ensuring the accuracy of battery equalization.
[0087] The first current value can be any suitable value, such as 0.8A-1.3A. The maximum value among the differences between the three current values is used for judgment, which can easily and accurately identify current fluctuations, so as to avoid the waveform being unstable when the current fluctuates, which would affect the identification of the inflection point.
[0088] A voltage drop should not occur during charging; a voltage drop indicates an abnormality. The difference between two detected voltage readings can be used to determine if a voltage drop has occurred, thus identifying any abnormal voltage fluctuations.
[0089] If the sampling of current and / or voltage is interrupted, it indicates that the current and / or voltage data is missing, which affects the algorithm function. The anomaly can be determined by sampling the duration of the interrupted signal. The first duration and the second duration can be various suitable values, such as 0.8S-1.3S. The first duration and the second duration can be the same or different.
[0090] The first and second temperatures can be various suitable values, such as the endpoint values of the normal temperature of the battery pack. This can help determine whether there is a temperature anomaly, so as to prevent the inflection point algorithm from failing under extreme temperatures, thereby improving the accuracy of inflection point identification.
[0091] Thermal management startup can be determined by changes in the start / stop flag output by the thermal management system status signal interface, so as to avoid unstable charging current during thermal management startup, which could lead to unreasonable algorithms.
[0092] In some embodiments, the method further includes controlling battery balancing based on identified feature inflection points.
[0093] When a feature inflection point is identified, battery balancing can be controlled based on the feature inflection point, thereby improving the accuracy of battery balancing.
[0094] In some embodiments, controlling battery equalization based on identified feature inflection points includes: controlling battery equalization based on at least one feature inflection point identified before the interference occurs.
[0095] When at least one characteristic inflection point is identified before interference occurs, battery balancing can be controlled, thereby avoiding over-balancing of the battery.
[0096] In some embodiments, controlling battery equalization based on at least one characteristic inflection point identified before the interference occurs includes:
[0097] When the identified characteristic inflection points include the characteristic inflection point of the battery cell with the highest voltage but not the characteristic inflection point of the battery cell with the lowest voltage, control all battery cells with identified characteristic inflection points to be equalized to a first equalization point. The first equalization point is the point where the interference occurred, or the point corresponding to the capacity value of the point where the interference occurred minus the first capacity value; and / or
[0098] When the identified characteristic inflection point includes the characteristic inflection point of the battery cell with the lowest voltage but not the characteristic inflection point of the battery cell with the highest voltage, control all battery cells whose characteristic inflection points have not been identified to be equalized from the first point to the second equalization point. The first point is the point when the interference occurs, and the second equalization point is the characteristic inflection point of the battery cell with the lowest voltage.
[0099] If the identified inflection points include the inflection point of the battery cell with the highest voltage but not the inflection point of the battery cell with the lowest voltage, it indicates that the target point for battery balancing (such as the inflection point of the battery cell with the lowest voltage) has not been identified. Figure 5 As shown in the figure, the dashed lines can represent the starting and ending points of balancing a single battery cell. The difference between two dashed lines corresponds to the capacity of the balancing value. In this case, the balancing point can be the point where the interference occurs, or the point corresponding to the capacity value at the point where the interference occurs minus the first capacity value, as the balancing point. This is in contrast to... Figure 2 The related technologies shown in this disclosure and the solutions of the embodiments can avoid over-balancing.
[0100] When the identified characteristic inflection points include the characteristic inflection point of the battery cell with the lowest voltage but not the characteristic inflection point of the battery cell with the highest voltage, it indicates that the target point for battery balancing (such as the characteristic inflection point of the battery cell with the lowest voltage) has been identified. For battery cells whose characteristic inflection points have not been identified, such as the battery cell with the highest voltage, the battery cell can be balanced at the point where the interference occurred, so as to balance as much as possible, avoid the adverse effects of interference on battery balancing, and ensure the comprehensiveness of battery balancing.
[0101] In some embodiments, the method further includes:
[0102] When the identified characteristic inflection points include the characteristic inflection point of the battery cell with the highest voltage but not the characteristic inflection point of the battery cell with the lowest voltage, control the imbalance of all battery cells whose characteristic inflection points were not identified; and / or
[0103] When the identified characteristic inflection point includes the characteristic inflection point of the battery cell with the lowest voltage but not the characteristic inflection point of the battery cell with the highest voltage, control all battery cells with identified characteristic inflection points to be balanced from the characteristic inflection point to the second balance point.
[0104] When the identified feature inflection points include the feature inflection points of the battery cells with the highest voltage but not the feature inflection points of the battery cells with the lowest voltage, the battery cells for which no feature inflection points were identified may not be balanced, thereby improving the accuracy of battery balancing.
[0105] When the identified feature inflection points include the feature inflection points of the battery cells with the lowest voltage but not the feature inflection points of the battery cells with the highest voltage, the battery cells with identified feature inflection points can be directly balanced based on the feature inflection points and the feature inflection points of the battery cells with the lowest voltage, thereby ensuring the comprehensiveness and accuracy of battery balancing.
[0106] In some embodiments, the first capacity value is 4%-7% of the battery capacity.
[0107] The first capacity value can be any suitable capacity value. By setting the first capacity value, the adverse effects of interference can be eliminated, thereby making the battery balancing more accurate.
[0108] The battery balancing method provided in this disclosure can control the stopping of current reduction charging based on the remaining time of current reduction charging when interference is confirmed, so as to avoid ineffective current reduction; it can also control the continuation or cessation of current reduction charging based on the number of characteristic inflection points identified before the interference occurs, so as to avoid over-balancing and thereby improve the accuracy and reliability of battery balancing.
[0109] This disclosure also provides a battery balancing system, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any of the above methods.
[0110] This disclosure also provides an electrical device including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any of the above methods.
[0111] This disclosure also provides a computer-readable storage medium having a computer program / instructions stored thereon, which, when executed by a processor, implement the steps of any of the above methods.
[0112] This disclosure also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of any of the above methods.
[0113] This disclosure also provides a vehicle that includes the battery balancing system described above.
[0114] It should be noted that the aforementioned electrical equipment can be any conventionally power-consuming equipment, such as, but not limited to, controllers, vehicles, skateboard chassis, ships, drones, mobile phones, computers, air conditioners, refrigerators, washing machines, microwave ovens, printers, fax machines, etc.
[0115] The embodiments of this disclosure have been described above with reference to the accompanying drawings. However, this disclosure is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this disclosure without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this disclosure.
Claims
1. A battery balancing method, characterized in that, include: When the current reduction charging identification characteristic inflection point is reached, if interference is confirmed, at least one of the following controls will be implemented: The current reduction charging is stopped based on the remaining time of the current reduction charging; The system controls whether to continue or stop current reduction charging based on the number of characteristic inflection points identified before the interference occurs.
2. The battery balancing method according to claim 1, characterized in that, The step of controlling the cessation of cessation charging based on the remaining time of cessation charging includes: controlling the cessation of cessation charging when it is determined that a characteristic inflection point cannot be identified within the remaining time of cessation charging.
3. The battery balancing method according to claim 1, characterized in that, If interference is confirmed, the following controls will be implemented: If, during the remaining time of the current-reducing charging period, it is determined that no characteristic inflection point can be identified, the current-reducing charging is stopped; and / or If a characteristic inflection point can be identified during the remaining time of the current reduction charging, the following control measures are implemented: If no characteristic inflection point is identified before the interference occurs, control continues to reduce current charging; and / or When at least one characteristic inflection point is identified before the interference occurs, the current reduction charging is stopped.
4. The battery balancing method according to claim 3, characterized in that, The step of controlling continued current reduction charging when no characteristic inflection point is identified before the interference occurs includes: when no characteristic inflection point is identified before the interference occurs, taking the moment when the interference occurs as the start moment of current reduction charging and controlling continued current reduction charging.
5. The battery balancing method according to claim 1, characterized in that, The types of interference include at least one of the following: current fluctuations, voltage fluctuations, sampling disconnection, temperature anomalies, and thermal management activation.
6. The battery balancing method according to claim 5, characterized in that, The current fluctuation is determined based on the current fluctuation value; and / or The voltage fluctuation is determined based on the voltage fluctuation value; and / or The sampling disconnection is determined based on the disconnection signal; and / or The temperature anomaly was determined based on the temperature of the battery pack.
7. The battery balancing method according to claim 6, characterized in that, The current fluctuation is determined based on the fact that the maximum difference between three consecutive detected current values is greater than or equal to a first current value; and / or The voltage fluctuation is determined based on two consecutive detected voltage readings indicating a voltage drop; and / or The sampling disconnection is determined based on the duration of the current sampling disconnection signal for a first duration and / or the duration of the voltage sampling disconnection signal for a second duration; and / or The temperature anomaly is determined based on the battery pack temperature being greater than a first temperature or the battery pack temperature being lower than a second temperature.
8. The battery balancing method according to claim 1, characterized in that, The method also includes controlling battery balancing based on the identified feature inflection points.
9. The battery balancing method according to claim 8, characterized in that, The method of controlling battery equalization based on the identified feature inflection point includes: controlling battery equalization based on at least one feature inflection point identified before the interference occurs.
10. The battery balancing method according to claim 9, characterized in that, The method of controlling battery equalization based on at least one characteristic inflection point identified before the interference occurs includes: When the identified feature inflection points include the feature inflection point of the battery cell with the highest voltage but not the feature inflection point of the battery cell with the lowest voltage, control all battery cells with identified feature inflection points to be equalized to a first equalization point. The first equalization point is the point where the interference occurred or the point corresponding to the capacity value at the point where the interference occurred minus the first capacity value; and / or When the identified feature inflection point includes the feature inflection point of the battery cell with the lowest voltage but does not include the feature inflection point of the battery cell with the highest voltage, control all battery cells whose feature inflection points have not been identified to be equalized from the first point to the second equalization point. The first point is the point when the interference occurs, and the second equalization point is the feature inflection point of the battery cell with the lowest voltage.
11. The battery balancing method according to claim 10, characterized in that, The method further includes: When the identified characteristic inflection points include the characteristic inflection point of the battery cell with the highest voltage but not the characteristic inflection point of the battery cell with the lowest voltage, control the imbalance of all battery cells whose characteristic inflection points were not identified; and / or When the identified characteristic inflection point includes the characteristic inflection point of the battery cell with the lowest voltage but not the characteristic inflection point of the battery cell with the highest voltage, control all battery cells with identified characteristic inflection points to be balanced from the characteristic inflection point to the second balance point.
12. The battery balancing method according to claim 10, characterized in that, The first capacity value is 4%-7% of the battery capacity.
13. A battery balancing system, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1-12.
14. A computer-readable storage medium having a computer program / instructions stored thereon, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method according to any one of claims 1-12.
15. A vehicle, characterized in that, include: The battery balancing system as described in claim 13.