检测并比较了不同过充电电流对AA型MH-Ni电池电化学性能的影响,实验结果表明,电池按国标以0.4C充至标称容量后,继续以0.4C过充,电池内压继续呈缓慢上升,其升高速度在电池容量达到2000mAh之前基本不变;当以1C过充时,电池内压上升速度明显加快;当以0.1C过充时,电池内压的升高速度下降,在电池容量达到1 600mAh之后,其速度变化趋于平稳.不同电流的过充电,对电池循环表退速度和电池放电电压下降速度的影响与电池内压升高速度的变化成正比.
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