基于可逆循环的电池变截面通道液冷仿真研究  

Simulation study of variable cross-section channel liquid cooling based on reversible circulation

作　　者：欧繁 李新 蒋维 李锦焙 董镝 Ou Fan;Li Xin;Jiang Wei;Li Jinpei;Dong Di(Guangdong Power Grid Corporation,Guangdong Foshan 528000,China)

机构地区：[1]广东电网有限责任公司佛山供电局,广东佛山528000

出　　处：《消防科学与技术》2024年第5期680-686,共7页Fire Science and Technology

基　　金：广东电网有限责任公司科技项目(GDKJXM20220255)。

摘　　要：以280 Ah方形磷酸铁锂电池为研究对象,设计了符合大容量电池组产热特点的变截面对称型流道液冷板,建立了锂离子电池组液冷仿真模型,采用可逆循环的液冷冷却方式,研究了电池组在不同冷却方式下的冷却效果及冷却液入口温度、可逆循环的转向发生时间对电池组散热性能的影响。结果表明:变截面对称型流道有助于提高位于电池组中心位置电池的散热性能,平衡由于位置不同引起的温度不均匀性;液冷板内的冷却液采用双向可逆循环方式比仅有自然对流条件下的电池组表面最高温度降低了17.8℃;研究提出的液冷板结构中,冷却液入口温度主要影响电池组表面的最高温度,而可逆循环的转向时间主要影响电池组的温度均匀性。Taking 280 Ah square lithium iron phosphate battery as the research object,this paper designed a variable section sym-metrical flow channel liquid cooling plate to conform the heat gen-eration characteristics of the large-capacity battery pack,estab-lished a liquid cooling simulation model of lithium-ion battery pack,and adopted a reversible liquid cooling method.The cooling effect of the battery pack under different cooling methods,the in-fluence of the inlet temperature of the coolant and the turning time of the reversible cycle on the heat dissipation performance of the battery pack were studied.The results show that the symmetrical flow channel with variable cross section can improve the heat dis-sipation performance of the battery located in the center of the bat-tery pack,so as to balance the temperature inconsistency caused by different positions.The bidirectional reversible circulation mode reduces the maximum surface temperature of the battery pack by 17.8℃compared with the condition of only natural con-vection.In addition,in the proposed liquid-cooled plate struc-ture,the inlet temperature of the coolant mainly affects the maxi-mum temperature of the battery pack surface,and the turning time of the reversible cycle mainly affects the temperature unifor-mity of the battery pack.

关 键 词：锂电池热管理 液冷板 流向控制 可逆循环液冷 

分 类 号：X913.4[环境科学与工程—安全科学] TM912[电气工程—电力电子与电力传动]