【摘要】 对一款磷酸铁锂软包电芯进行分别在带夹具和不带夹具下的不同电流倍率环境的过充电测试。经实验，发现过充电电压曲线存在好几个不同斜率的电压上升阶段，以此现象为出发点，并结合相关文献及电化学原理，分析出可能造成该现象的内在原因。电压曲线还表明，电芯在不同条件下过充时均会出现一个固定的电压平台，通过分析认为该平台值很大程度上受过充电位影响，在极端情况下还会受电芯鼓胀以及过充电流值的影响。更多还原

【Abstract】 A lithium iron phosphate soft-packed cell is tested for overcharge at different current rates with and without a clamp. Through experiments, it was found that there are several voltage rising stages with different slopes in the overcharge voltage curve. Taking this phenomenon as a starting point, combined with relevant literature and electrochemical principles, the internal reasons that may cause this phenomenon are analyzed. These voltage curves also show that a constant voltage plateau occurs when the cell is overcharged under different conditions. Through analysis, the plateau value is largely affected by overcharge voltage, and in extreme cases, it will also be affected by cell bulge and overcharge current value.更多还原