工作温度对磷酸铁锂电池SOC影响及研究进展
收稿日期: 2014-11-06
修回日期: 2014-12-31
网络出版日期: 2015-02-13
基金资助
国家自然科学基金（51206175；51477171）
Research Progress on Effects of Temperature on SOC and Its Estimation for LFP Battery
Received date: 2014-11-06
Revised date: 2014-12-31
Online published: 2015-02-13
储能电池在新能源并网、新能源汽车等产业领域发挥着重要作用，为了对电池进行有效地控制与管理，需要配备必要的电池管理系统，电池荷电状态（SOC）是其中最为重要的一环。磷酸铁锂（LiFePO4，LFP）电池SOC与多个影响因素密切相关，呈强非线性，本文重点归纳温度对磷酸铁锂电池SOC的影响。首先将工作温度对开路电压、实际容量、充放电效率、自放电率及电池老化等电池特性的影响进行归纳总结，随后通过对工作温度的影响规律进行分析、总结和归纳，基于经典“开路电压 + 安时积分”法将温度参数直接或间接引入到SOC的实时估算模型中，得到考虑温度参数的新模型，进而提高电池SOC的估算精度。
罗 玲 , 宋文吉 , 林仕立 , 吕 杰 , 陈永珍 , 冯自平 . 工作温度对磷酸铁锂电池SOC影响及研究进展[J]. 新能源进展, 2015 , 3(1) : 59 -69 . DOI: 10.3969/j.issn.2095-560X.2015.01.010
In order to effectively control and manage the battery energy storage system (BESS), which plays more and more important roles in new energy integration and reducing environmental pollution, it is necessary to develop battery management system (BMS) to achieve a high performance of BESS. As an important parameter, the state of charge (SOC) of Li-ion battery has been researched widely nowadays, aiming to improve the estimation accuracy. LiFePO4 (LFP) battery has a prospective value in various applications and its SOC is closely related to multiple factors. The relationships between temperature and several characteristics of battery, such as the open circuit voltage, charge-discharge efficiency, nominal capacity and self-discharge rate, are introduced in this paper. Based on the conclusions and summaries above, the temperature parameters were introduced to the SOC estimation model directly or indirectly in real time, the estimation accuracy of SOC would be improved significantly by considering the effects of temperature.
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