一款电动汽车用锂离子电池循环过程中的性能研究

Study on the Performance of Lithium-ion Battery in Electric Vehicle during Cycling Test

以一款市售的40Ah三元离子电池为研究对象,研究其在充放电循环过程一致性的变化、高低温放电性能以及倍率充放电性能。结果表明,随着循环次数的增加,样品的容量一致性变差,低温特性和倍率充电性能变差,而高温放电特性和倍率放电性能基本无衰减。

A 40Ah ternary lithium-ion battery was used as the research object to study its consistency change,high and low temperature discharge performance and rate charge and discharge performance during the charging and discharging cycle.The results show that with the increase of the number of cycles,the consistency of the sample capacity becomes worse,the low temperature characteristic and the rate charge performance become worse,while the high temperature discharge characteristic and the rate discharge performance are basically not attenuated.