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BQ40Z80 第7串电池电压 比其他高20mV

Other Parts Discussed in Thread: BQSTUDIO

电池每串实际电压 3597V,按照校准步骤,第一节电压,第6节到VSS电压,第7节到VSS电压。校准完后,第7节电压比其他大20mV。我很奇怪啊,就算按照第七节总电压 -第6节总电压,这样算出来的,也是跟实际一致啊。   已经搞了好几个电池,都是这样的,搞不懂 这个电压偏置校准 原理。