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BQ76930: bq76930充电和放电过流保护问题

Part Number: BQ76930


1、平台描述:

通过两个bq76930实现20s电芯保护,检测电阻为1mΩ,通过BMS综合测试仪测试,库仑计寄存器算出的实时电流值较为准确。

2、咨询问题:

目前已对放电过流保护功能测试,感觉低电流放电过流保护偏差有点大:

读取的电流值为负值,当设置保护电流较低时如8A,读取到实际保护值为12A,感觉偏差有点大,当设置保护电流较高时如17A,是正常的吗?

芯片是否有对充电过流保护的控制功能?是通过CHG控制吗?也是通过OCD寄存器控制吗?

  • 您好,The BQ76930 does not have an overcurrent charge (OCC) protection feature.  The hardware supported overcurrent protection is for discharge (OCD).  In a system with the BQ769x0 family devices a OCC protection can be implemented with the MCU or gauge using the values read from the coulomb counter, it is a slower average value type limit.