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BQ76930: BQ78350-R1+BQ76930组合

Part Number: BQ76930
Other Parts Discussed in Thread: BQ78350-R1, BQ76200, TIDA-00792, BQ78350,

你好 有几个问题想请教一下

1.BQ78350-R1+BQ76930芯片作为保护板用在8串的电芯上,现象就是好多台模组充放电多个循环后都出现第七串电压偏低的现象

工况:把芯片的供电总正也就是电池的总正断开后(相当于模组关机我们取的是放电MOS的电),电流表串进第7串电芯采集线中发现第七节功耗偏大至0.7136mA,其他串最大至0.15到0.2mA之间

为什么会出现七串电压偏低的现象呢,主要是什么原因导致,还是哪里的操作不当

原理图如下所示