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BQ40Z50R1 SOC跳变问题

各位好,4串铁锂电池,已经制作了chem_ID,跑循环SOC基本是准的了,但是电池在搁置期间电量有跳变的现象。

电池搁置3天,电量从45%掉到了37%,昨天待电40%的电池今天通信看变成41%了,这两种情况都是同一个电池,用的是EVM板。

查看RELAX_JUMP_OK的设置是0,请问会是哪些原因引起的SOC跳变呢?