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BQ40Z50-R1初始状态下 ,CELL4电压为0V

Other Parts Discussed in Thread: BQ40Z50-R1, EV2400, BQSTUDIO

做4串的电池,按照官网上BQ40Z50-R1的原理图 做的板,通讯后发现第4个电芯的电压为0V,换了个板还是一样的,怎么回事。