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BQ76940EVM: bq76930EVM接线和均衡问题

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Prodigy 20 points
Part Number: BQ76940EVM
Other Parts Discussed in Thread: BQ76940

您好，我有几个疑问，如图所示，你们有4个引脚bat+,-。pack+，-。当我接直流电源给电池充电时，我的正负极应该接到pack+(bat+),pack-还是bat+和bat-。

当我直流电源接bat+-时，电流是感应不出来的，不经过R3。接到PACK+-，负极不通，就是pack+-间的电压变为0，（但是我接电源之前，pack+-是有电压的，接上电源或者负载瞬间，电压值就变为0了）。

均衡问题：我通过bq76940的上位机看寄存器的值，Cell Balance123都是0，我写进去一个值，瞬间又变成0了，不进行均衡。

就是瞬间又变成0了，不进行均衡。

  • 0
    TI__Guru*** 130456 points

    您好，B+B-是接电池端，P+P-是充放电接的端口。

    All cell balancing control bits in CELLBAL1, CELLBAL2, and CELLBAL3 are automatically cleared under the following events, and must be explicitly rewritten by the host microcontroller following clearing of the event:

    • DEVICE_XREADY is set

    • Enters NORMAL mode from SHIP mode