The invention discloses an electric quantity balancing method and device for a battery pack. The method comprises the following steps: acquiring a first corresponding relation of a battery pack under the condition that the charging of the battery pack is finished, and acquiring a first temperature and a first voltage of each single battery when the charging is finished; according to the first temperature, the first voltage and a first corresponding relation, determining a first residual charging electric quantity of each single battery; determining the maximum first residual charging electric quantity in the plurality of first residual charging electric quantities as a target residual charging electric quantity; for each single battery, calculating a difference value between the target residual charging electric quantity and a first residual charging electric quantity corresponding to the single battery to obtain a first to-be-balanced electric quantity of the single battery; and under the condition that the first to-be-balanced electric quantity is greater than a preset threshold value, balancing the electric quantity of the single battery based on the first to-be-balanced electric quantity in the next discharging process of the single battery. Therefore, the electric quantity of the single battery can be accurately balanced.
本申请公开了一种电池组的电量均衡方法及装置。该方法包括:在电池组充电结束的情况下,获取电池组的第一对应关系,获取每个电池单体在充电结束时的第一温度和第一电压;根据第一温度、第一电压和第一对应关系确定每个电池单体的第一剩余充电电量;确定多个第一剩余充电电量中最大的为目标剩余充电电量;针对每个电池单体:计算目标剩余充电电量与电池单体对应的第一剩余充电电量的差值,得到电池单体的第一待均衡电量;在第一待均衡电量大于预设阈值的情况下,在电池单体下一次放电过程中,基于第一待均衡电量对电池单体的电量进行均衡。这样可以准确地对电池单体进行电量均衡。
Method and device for balancing electric quantity of battery pack
电池组的电量均衡方法及装置
2024-10-29
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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