电动汽车锂离子电池散热加热设计

Design of Cooling and Heating of Lithium-ion Battery Used in Electric Vehicle

锂离子电池热管理已成为制约电动汽车商业化的瓶颈,为解决此问题,将微热管阵列应用于锂离子电池散热和加热系统.通过测量布置热管前后电池表面温度可知:在1C充放电倍率下,散热系统能有效降低电池模组的温度及电池间温度差异,将温度和温度差值分别控制在40℃与5℃之内;通过加热片加热热管,有效提高电池低温放电性能,从而提高电池持续充放电过程的稳定性和安全性.

Thermal management of lithium-ion( Li-ion) battery remains a challenge before widespread commercialization occurs. To solve this problem,the micro heat pipe arrays( MHPAs) were used in cooling and heating system. Temperatures were measured with and without MHPAs during the chargedischarge cycle at 1C rate. The temperature of the battery pack and temperature differences were effectively reduced by the system, and the temperature and the temperature difference value were controlled within 40 ℃ and 5 ℃,respectively. The battery performance at low temperature was improved by heating sheet. The results of the experiments reveal the enhanced stability and safety during the continuous charge-discharge cycle.