【摘要】：通過對國內(nèi)外五款純電動(dòng)車用18650電池進(jìn)行電化學(xué)性能測試、變異系數(shù)分析和相關(guān)性分析,評估電池在初始階段和老化過程中的一致性,并系統(tǒng)分析電流、溫度及電壓范圍對電池一致性的影響.結(jié)果表明:為了提高純電動(dòng)車用18650電池全壽命周期內(nèi)的一致性,必須控制充電倍率小于0.3C,放電倍率小于0.5C,使用溫度高于0℃.此外,優(yōu)化電池篩選工藝也是改善電池一致性的一個(gè)重要方法.初始篩選時(shí)加入能夠表征壽命因素的特征參數(shù)k值,即靜置時(shí)開路電壓的下降速率,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，

本文編號：2487188