一种基于内阻的电动汽车变电流充电方式

A variable current charging method of lithium-ion battery for electric vehicle base on resistance detection

电流、温度大小会影响电动汽车锂离子动力电池组充电的效率及电池组一致性;其本质是电池内阻受电流及温度的影响所呈现的特性所致。通过对锂离子动力电池组进行不同温度、不同充电电流下内阻变化进行研究,提出一种基于内阻检测的动力电池组变电流充电方式。通过不同充电方式下电动汽车续驶里程比较测试,验证所提方法的有效性,为电动汽车电池正确使用及能源效率提高提供一套新的方法。

The charging efficiency and consistency of electric vehicle lithium-ion battery can be affected by the current and temperature, the reason for the phenomenon is that the resistance of battery is affected by the current and temperature. The resistance change in different current and temperature was studied. A variable current charging method based on resistance detection was proposed. The electric vehicle driving range tests in different charging methods were used in the experiments, and the results show that the proposed method was effective and it can improve the energy efficiency and extend the battery life.