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BQ78350-R1+BQ76920 充电问题

各位大大好,我在充电的时候,在Pack端连接电源供应器给电,会影响到电池端的实际电压,如:

18350的电池组总电压是18.5V,提供21V电压后,电池侧的电压立即升高到20V左右,并且会影响到充电电流,使充电速度变慢。

中断充电后,原本电池测量的20V又会掉到18.19V

我把所有的保护都关闭了

请问大大們知道这个该怎么解决吗?  我个人是刚接触的新手还请见谅