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因电池组已经封装好了不能使用BQ76940之类的模拟前端，不知能否用单节电池的电量计把电池电压分压，减小电流取样电阻的方法实现，最后软件算出实际容量，不清楚这样对容量，充电时间，放电时间的精度有多大影响。
推荐bq34z100G1.
容量和电流达不到啊
