磷酸铁锂电池滥用试验及痕迹研究

Lithium-ion phosphate battery abuse experiments and patterns research

以电动汽车用磷酸铁锂电池作为研究对象,针对机械滥用、电滥用、热滥用几种常见滥用方式,对电池进行试验,探究电动汽车锂离子电池作为火场引火源和火场可燃物时,其电压和温度的变化,并总结其残留物痕迹特点。研究表明,电池荷电量越高,受损程度越重,铝塑包装的完整性越差,颜色变化越丰富,褶皱越明显。磷酸铁锂电池发生热失控,持续时间久,释放能量多。

Take the lithium-ion phosphate battery for electric vehicles as the research object,to explore the changes of voltage and temperature of lithium-ion battery of electric vehicle when it is used as ignition source and summarize its characteristics of residue patterns,the main abuse ways of mechanical damage,electrical damage and thermal damage were used in the experiment.The results show that the higher the SOC value is,the greater the damage is,the worse the integrity of the aluminumplastic packaging,the richer the color variation,and the more obvious the folds.When the lithium-ion phosphate battery has thermal runaway,it will release much energy for a long time.