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BQ40Z80: 关于电芯损坏的问题,触发SOV

Part Number: BQ40Z80
Other Parts Discussed in Thread: BQSTUDIO

我们对电池进行过放操作,过放到不能放电后。我们再对它进行充电,然后发现电池触发了SOV,电芯5的电压达到了6V,过阵子电芯5电压变为0V。请问这个可能是什么原因造成的?我们电路设计是参考手册设计的?有可能是电路设计的问题吗?