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求解,BQ20Z45采集电池电压为0



我按照bqeasy的学习步骤对电池学习完成之后,也正确生成了.dfi文件,但是后来软件显示的电池电压为0,开始以为是板子换了,重新焊了一块板子连接后仍然显示电池电压为0,也无法充放电,无法校准。请问,这个是怎么回事呢?是哪没设置好吗?