考虑温度影响的锂电池功率状态估计

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摘要动力电池的功率状态(SOP)是电动汽车安全控制及能量回收的重要参数之一。现有针对常温的SOP估计方法并不准确,从而导致高温或低温下的锂电池工作电流过大,影响电池安全与循环寿命。通过测量不同温度下的锂电池容量及内阻,建立锂电池容量-温度模型以及内阻-温度模型,准确预测锂电池相关参数在不同温度下的变化情况,并采用基于EKF的多参数约束法进行SOP估计。该方法适用于不同温度下的锂电池,能实现较高的估计准确度,仿真和实验结果验证了其准确性。

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	刘新天
	何耀
	曾国建
	郑昕昕

关键词 ：动力锂电池, 功率状态, 容量-温度模型, 内阻-温度模型, 多参数约束

Abstract：The state-of-power (SOP) of Li-ion batteries is an important parameter for security control and energy recovery of electric vehicles.The current SOP estimation algorithm at room temperature is inaccurate, which may cause the excessive current at high or low temperature to affect the security and cycle life of the battery.Therefore, the capacity and resistance of the Li-ion battery are tested at different temperature to build the capacity-temperature model and resistance-temperature model for more accurate prediction of the Li-ion parameters.Then an algorithm with multi-parameters constrained based on extend Kalman filter (EKF) is used to estimate the SOP of the Li-ion battery at different temperatures.The method can adapt to different temperature conditions and realize high estimation accuracy.The simulation and experimental results verify the theoretical analysis.

Key words： Power Li-ion battery state-of-power (SOP) capacity-temperature model resistance-temperature model multi-parameters constrained

收稿日期: 2015-05-14 出版日期: 2016-07-15

PACS:

TM912

基金资助:国家自然科学基金 (21373074)和安徽省国际合作项目(1303063010)资助。

作者简介: 刘新天男,1981年生,副研究员,研究方向为电池管理系统及自动控制理论。E-mail:xintian.liu@hfut.edu.cn;何耀男,1984年生,副研究员,研究方向为动力锂电池及管理。E-mail:yao.he@hfut.edu.cn(通信作者)

引用本文:

刘新天,何耀,曾国建,郑昕昕. 考虑温度影响的锂电池功率状态估计[J]. 电工技术学报, 2016, 31(13): 155-163. Liu Xintian, He Yao ,Zeng Guojian ,Zheng Xinxin. State-of-Power Estimation for Li-ion Battery Considering the Effect of Temperature. Transactions of China Electrotechnical Society, 2016, 31(13): 155-163.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I13/155

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