摘要
电动汽车在低温地区工作运行,电池组的性能会下降,低温对电池组充放电容量的影响比较大。为了使电动汽车在低温地区能够正常工作,低温下准确的SOC估计是必不可少的条件。本文提出了一种改进安时计量法适用于不同温度条件的电池SOC估计算法,该算法主要考虑了不同温度下电池实际可用容量的变化对SOC估计的影响,并且可以对不同温度下估算的SOC进行换算。通过平台实验验证,该算法在不同的温度环境下具有较高的精度。
When the EVs work in the low temperature areas, the performance of battery pack will decline. Low temperature has a big impact on the charge/discharge capacity of battery pack. In order to ensure the EVs can work normally in low temperature areas, accurate SOC estimation is essential. In this paper, an improved ampere-hour counting method which is suitable for different temperature conditions is proposed. This algorithm mainly considers the available capacity variation of battery at different temperature impacts on SOC estimation. In addition, SOC can be converted at different temperatures. Through the platform experimental verification, this algorithm has high accuracy in different temperature environment.
出处
《电工技术学报》
EI
CSCD
北大核心
2014年第7期53-58,共6页
Transactions of China Electrotechnical Society
基金
国家高技术研究发展计划(863计划)(2012AA111003)资助项目
关键词
磷酸铁锂电池
SOC估算
低温
安时法
Lithium-ion battery,state of charge(SOC) estimation,low temperature,ampere-hour counting method
