往复流散热方式的锂离子电池热管理  

Thermal Management of Lithium-ion Battery with Reciprocating Air-flow Cooling Mode

作　　者：梁波[1,2,3] 欧阳陈志 刘燕平[1] 毛聪[1] 唐思绮 江清柏 

机构地区：[1]长沙理工大学,工程车辆安全性设计与可靠性技术湖南省重点实验室,长沙410114 [2]长沙理工大学,工程车辆轻量化技术与可靠性技术湖南省高校重点实验室,长沙410114 [3]中南大学冶金与环境学院,长沙410083

出　　处：《汽车工程》2014年第12期1449-1454,共6页Automotive Engineering

基　　金：国家自然科学基金(50803008和51005024);中国博士后资助项目(201104508和20100480946)资助

摘　　要：为解决电池模块内部单体电池间的温度不均匀性而影响电池的使用性能和寿命的问题,本文中采用了一种往复流冷却方式,使冷却空气流动方向周期性逆转,以降低单向流空气冷却方式时单体电池沿空气流方向的温度梯度。结果表明,采用往复流冷却方式后,在1C和13.33C放电倍率下,电池温度均匀性分别提高了12.1%和62.4%,电池模块的使用性能和安全性得到改善,电池使用寿命得以提高。同时,文中还利用计算流体动力学虚拟试验与正交优化相结合,对影响往复流散热性能的往复流入口的速度与温度和往复周期3个参数进行了优化,并揭示了它们对电池最高温度和温差的影响规律。For solving the problem of the temperature unevenness among individual cells in battery module affecting service performance and lifespan of battery,a reciprocating air-flow cooling mode is adopted in this paper,with which the direction of cooling air flow is reversed periodically to reduce the temperature gradient in battery along air-flow direction in conventional cooling mode with unidirectional air flow. The results show that with reciprocating flow cooling mode,the temperature evenness of battery increases by 12. 1% and 62. 4% respectively under1 C and 13. 33 C discharge current rates,so the service performance and safety of battery greatly improved with its service life extended. In addition,an optimization is also carried out on three parameters affecting heat dissipation performance,i. e. the velocity and temperature of air flow at inlet and reversal frequency,with the law of their influence on the highest temperature and temperature difference of battery revealed.

关 键 词：锂离子电池 热管理 温度差 往复流 正交优化 仿真 

分 类 号：U469.72[机械工程—车辆工程] U463.633[交通运输工程—载运工具运用工程]