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请教bq78350的问题

Other Parts Discussed in Thread: BQ78350

附件中是按照bq78350数据手册电路修改而来,现在出现长时间闲置之后,电池放电问题,能把电池电量放到0,电池电压为0v。先问一下,bq78350 12引脚的功能,是不是附件中电路把电池放电的?