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FCC 变小的问题



请教个问题,电池充电到80%后静置5小时,电池进入了sleep 模式, 再接负载用EV2300读取发现FCC变小20%,QMAX值也变小了5%,RA_table变化不大.

后续再进行完整充放电两次,FCC还是偏小20%。Gauge用的是BQ20Z75

请问什么造成了FCC和QMAX的变小?为什么完整的充放电后FCC不能变正确?