A battery management system according to the present invention comprises: a sensing unit for generating a sensing signal representative of a battery voltage and a battery current of a battery; a storage unit for storing a charging map in which first to n-th reference currents (n is a natural number equal to or greater than 2), first to n-th reference voltage ranges, first to n-th reference SOCs, and first to n-th reference voltage curves for multi-stage constant current charging are recorded; and a control unit that, in response to the charging start command, instructs the charging circuit to perform constant current charging by using a kth reference current corresponding to a kth reference voltage range (k is a natural number of n or less) to which the battery voltage belongs. In response to the battery voltage reaching an upper limit of a kth reference voltage range, the control unit updates the charging map by comparing a kth measured voltage curve indicating a correlation between the battery voltage of the battery and the SOC during a charging period of the constant current charging with a kth reference voltage curve.
根据本发明的电池管理系统包括:感测单元,其用于生成代表电池的电池电压和电池电流的感测信号;存储单元,其用于存储充电图,在充电图中记录了用于多级恒流充电的第一至第n参考电流(n为等于或大于2的自然数)、第一至第n参考电压范围、第一至第n参考SOC、以及第一至第n参考电压曲线;以及控制单元,其响应于充电开始命令,指示充电电路通过使用与电池电压所属的第k参考电压范围(k为n以下的自然数)相对应的第k参考电流进行恒流充电。响应于电池电压达到第k参考电压范围的上限,控制单元通过将指示在恒流充电的充电时段内电池的电池电压和SOC之间的相关性的第k测量电压曲线与第k参考电压曲线进行比较,来更新充电图。
Battery management system, battery management method, battery pack, and electric vehicle
电池管理系统、电池管理方法、电池组以及电动车辆
2023-04-04
Patent
Electronic Resource
Chinese
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / 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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