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基于等效热模型的锂电池容量衰减特性研究
Research on capacity fading characteristics of Li-ion battery based on Equivalent Thermal Model
投稿时间:2018-09-10  修订日期:2018-10-10
DOI:
中文关键词:  动力锂电池  内部温度  等效热模型  容量衰减  ETM-Arrhenius模型
英文关键词:power Li-ion battery  inner temperature  Equivalent Thermal Model  capacity fading  ETM-Arrhenius model
基金项目:广西电网有限责任公司科技资助项目(GXKJQQ20152008)
作者单位E-mail
钟国彬 广东电网有限责任公司电力科学研究院 zhongguobin001@163.com 
曾国建 合肥工业大学汽车工程技术研究院 guojian.zeng@hfut.edu.cn 
刘新天 合肥工业大学汽车工程技术研究院 xintian.liu@hfut.edu.cn 
何耀 合肥工业大学汽车工程技术研究院 yao.he@hfut.edu.cn 
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中文摘要:
      在动力锂电池的循环使用过程中,温度对其容量衰减有直接影响,而电池结构的密封性导致其内部真实温度无法直接测量。针对此问题,通过测量电池表面及环境温度并运用等效热模型估计其内部的真实温度,构建电池容量衰减与内部温度的ETM-Arrhenius模型,预测锂电池在循环使用中的容量衰减特性。对锂电池进行不同温度下的循环寿命试验,结果表明,该模型能在长期循环中准确预测锂电池容量的衰减程度。
英文摘要:
      Temperature has a direct impact on capacity fading of power Li-ion battery during its lifecycle, but the inner temperature of Li-ion battery cannot be measured directly because of the sealed structure. Aiming at this problem, firstly, we estimated the inner temperature of Li-ion battery by measuring the surface and ambient temperature with the use of Equivalent Thermal Model, then build the ETM-Arrhenius (Equivalent Thermal Model-Arrhenius) model based on the inner temperature. So the capacity fading characteristics of Li-ion battery can be predicted accurately during its lifecycle. We conducted cycle life test on Li-ion battery under different temperature,and the result shows that, the ETM-Arrhenius model can predict the capacity fading characteristics of Li-ion battery accurately during its lifecycle.
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