汽车工程 ›› 2020, Vol. 42 ›› Issue (1): 59-65.doi: 10.19562/j.chinasae.qcgc.2020.01.009

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校准量热法测量锂电池比热容和生热率*

吴青余, 张恒运, 李俊伟   

  1. 上海工程技术大学机械与汽车工程学院,上海 201620
  • 收稿日期:2018-12-10 发布日期:2020-01-21
  • 通讯作者: 张恒运,教授,E-mail:zhanghengyun@sues.edu.cn
  • 基金资助:
    *上海市科委重点项目(14520501100)和国家自然科学基金(51876113)资助

Calibrated Calorimetry for Measuring the Specific Heat Capacityand Heat Generation Rate of Lithium-ion Battery

Wu Qingyu, Zhang Hengyun, Li Junwei   

  1. College of Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620
  • Received:2018-12-10 Published:2020-01-21

摘要: 本文中对利用校准量热法测量18650圆柱电池的比热和生热率进行了研究,它根据电池的温度变化和热损标定,确定锂离子电池的比热容,并测定大倍率放电时的生热率。实验结果表明:电池的比热容随环境温度的升高而增大,两者呈线性正相关。电池在放电过程中的生热具有时变瞬态的特点,电池平均生热率与放电倍率的平方正相关。此外,通过恒定功率生热实验证明了采用校准量热法测量电池比热容和生热率的准确性,方法简单,且实验过程不损坏电池。

关键词: 锂离子电池, 校准量热法, 比热容, 生热率

Abstract: The measurement of the specific heat capacity and heat generation rate of lithium ion battery by using calibrated calorimetry is studied in this paper, in which the specific heat capacity of lithium ion battery is determined and its heat generation rate in high rate discharge is measured based on temperature change and heat loss calibration of battery. The results of experiment show that the specific heat capacity of lithium ion battery increases with the rise of ambient temperature, exhibiting a linear positive correlation. The heat generation of battery in discharge process has time varying and transient features and the average heat generation rate of battery is positively correlated with the square of discharge rate. In addition, the heat generation experiment with constant power demonstrates that using calibrated calorimetry to measure the specific heat capacity and heat generation rate of battery is accurate, simple and nondestructive

Key words: lithium ion battery, calibrated calorimetry, specific heat capacity, heat generation rate