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BQ77910A加电池发烫

Other Parts Discussed in Thread: BQ77910A

BQ77910A写入EEPROM正常,校验正确

但加电池上电时发现从GND端依次插入电池至第三节时(VC8,VC9之间),芯片剧烈发热,3-5s后到烫手程度。

电池电压均在4.04V左右,检查均衡电阻没有发现短路等异常现象,请问BQ77910A发热还有什么可能原因?是不是在焊接时导致芯片损坏?