纯电动车用18650电池的一致性研究
发布时间：2019-05-28 16:10
【摘要】：通过对国内外五款纯电动车用18650电池进行电化学性能测试、变异系数分析和相关性分析,评估电池在初始阶段和老化过程中的一致性,并系统分析电流、温度及电压范围对电池一致性的影响.结果表明:为了提高纯电动车用18650电池全寿命周期内的一致性,必须控制充电倍率小于0.3C,放电倍率小于0.5C,使用温度高于0℃.此外,优化电池筛选工艺也是改善电池一致性的一个重要方法.初始筛选时加入能够表征寿命因素的特征参数k值,即静置时开路电压的下降速率,是非常有效的.
[Abstract]:Through the electrochemical performance test, coefficient of variation analysis and correlation analysis of 18650 batteries for five pure electric vehicles at home and abroad, the consistency between the initial stage and the aging process of the batteries was evaluated, and the current was systematically analyzed. Effect of temperature and voltage range on battery consistency. The results show that in order to improve the consistency of the whole life cycle of 18650 battery for pure electric vehicle, it is necessary to control the charging rate less than 0.3C, the discharge rate less than 0.5C, and the service temperature higher than 0 鈩，
本文编号：2487188
[Abstract]:Through the electrochemical performance test, coefficient of variation analysis and correlation analysis of 18650 batteries for five pure electric vehicles at home and abroad, the consistency between the initial stage and the aging process of the batteries was evaluated, and the current was systematically analyzed. Effect of temperature and voltage range on battery consistency. The results show that in order to improve the consistency of the whole life cycle of 18650 battery for pure electric vehicle, it is necessary to control the charging rate less than 0.3C, the discharge rate less than 0.5C, and the service temperature higher than 0 鈩，
本文编号：2487188
本文链接：https://www.wllwen.com/kejilunwen/dianlidianqilunwen/2487188.html
