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BQ76930 前后采样电压出现压差台阶



       量产项目,升级库存电池包时,发,1000台电池包中会出现约5台电池包存在前5串电池电压低,后5串电池电压高的情况,拆解电池包,实测AFE采样引脚滤波电容上的电压发现,前5串AFE读出的电压很精准,后5串AFE读出的电压比实际值高出15mV左右,想知道这是什么问题?是否正常?