车用大尺寸软包锂离子电池在高低温升工况下的生热率测定  

Determination of heat generation rate for a large-size vehicle pouch lithium-ion battery under high and low temperature rise conditions

作　　者：王帅林 盛雷 苏林[1] 方奕栋[1] 李康 Wang Shuailin;Sheng Lei;Su Lin;Fang Yidong;Li Kang(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海理工大学机械工程学院,上海200093

出　　处：《仪器仪表学报》2021年第8期87-94,共8页Chinese Journal of Scientific Instrument

摘　　要：提出了一种电动汽车用大尺寸软包锂离子电池的生热率测量方法——热补偿法,研究了电池生热率与工作电流、温度之间的曲线关系,其有效性得到了常规热流计法的验证,最后结合这两种方法研究了电池在高、低温升工况下的生热特性。研究结果表明,基于热补偿法的电池生热率平均测算偏差低于5.6%;电池的生热率随工作电流的增大而增大,二者呈二次非线性关系;电池在高温升工况下的生热率随放电深度呈先降后升趋势,形似U型曲线;电池在低温升工况下的平均生热率较其在高温升工况下高约13.7%。提出的热补偿法具有精度高、成本低、简便灵活等优势,研究成果可为大尺寸软包锂离子电池的热模型建立和热管理系统设计给予指导。The paper proposes a heat generation rate measurement method for large-size pouch lithium-ion batteries used in electric vehicles(EV),namely,the thermal compensation method.The curve relationship between the battery heat generation rate and operating current,temperature was studied,the effectiveness of the thermal compensation method was verified with the conventional method using heat flow meter.Finally,combining these two methods,the heat generation characteristics of the battery under high and low temperature rise conditions were studied.The study results show that the average calculated deviation of battery heat generation rate based on thermal compensation method is less than 5.6%.The battery heat generation rate increases with the increase of operating current,and the relationship between the two shows quadratic nonlinear relationship.The heat generation rate of the battery under high temperature rise condition first decreases and then rises with the depth of discharge as a U-shaped curve.The average heat generation rate of the battery under low temperature rise condition is about 13.7%higher than that under high temperature rise condition.The thermal compensation method proposed in this paper has the advantages of high accuracy,low cost,simplicity and flexibility.The research results can provide a guidance for the establishment of thermal model and thermal management system design of large-size pouch lithium-ion batteries.

关 键 词：大尺寸软包锂离子电池 生热率 高低温升工况 热补偿法 实验测试 

分 类 号：TM911[电气工程—电力电子与电力传动] TH89[机械工程—仪器科学与技术]