锂离子电池冷却固定一体化冷板散热研究  

Research on cooling and fixing of lithium-ion battery cooling and fixed integrated cold plate heat dissipation

作　　者：孙广强 李志强[1] 王方[1] 邓虹 巴义春 SUN Guangqiang;LI Zhiqiang;WANG Fang;DENG Hong;BA Yichun(School of Energy and Environment,Zhongyuan University of Technology,Zhengzhou 450007,Henan,China)

机构地区：[1]中原工学院能源与环境学院,河南郑州450007

出　　处：《储能科学与技术》2023年第11期3352-3360,共9页Energy Storage Science and Technology

基　　金：动力电池组紧致空间冷却系统强化传热技术与应用(21A470009);中原工学院研究生科研创新计划(YKY2023ZK12)。

摘　　要：基于圆柱状锂离子电池产热特点,设计了一种冷却固定一体化冷板,采用数值模拟方法探究了冷却液入口流量、环境温度和冷却固定孔深度等参数对一体化冷板冷却性能的影响,并与蜂窝状冷板进行了性能比较。结果表明:与蜂窝状冷板相比,冷却固定一体化冷板可以进一步降低锂离子电池组最高温度,并且采用一体化冷板冷却的锂离子电池组最低温度高于同一工况下蜂窝状冷板冷却的电池组最低温度,电池组组内最大温差平均可下降13.3%;一体化冷板的质量较蜂窝状冷板下降9.7%;一体化冷板入口流量从30 mL/min增大到60 mL/min,冷板进出口压损从352 Pa增大到832 Pa,锂离子电池组最高温度、最低温度均明显下降,组内最大温差降低了0.458 K;一体化冷板的冷却固定孔孔深从7 mm增大到13 mm的过程中,锂离子电池组最高温度逐渐下降,最低温度则逐渐上升,电池组组内最大温差下降了20.8%,冷却固定结构重量增加了46.2%;在296.15 K、298.15 K、300.15 K及302.15 K的环境温度下,一个充放电周期结束后,电池组最高、最低温度十分接近,环境温度302.15 K时,电池组最大温差明显高于其他环境温度下电池组最大温差。The study presents the design of an integrated liquid-cooled plate based on the heat generation characteristics of cylindrical lithium-ion batteries.The effects of inlet flow rate,ambient temperature,and depth of cooling fixed hole on the cooling performance of the integrated liquid-cooled plate were investigated through numerical simulations,and the performance was compared with that of the honeycomb liquid-cooled plate.The results showed that the integrated liquid-cooled plate outperforms its honeycomb counterpart in reducing the maximum temperature of the lithium-ion battery pack.Although the minimum temperature of the battery pack remains higher in the integrated system than that in the honeycomb system under similar ambient conditions,the maximum temperature variation within the battery pack diminishes by an average of 13.3%in the integrated system.Additionally,the integrated plate weighs 9.7%less than the honeycomb plate.As the inlet flow rate of the integrated liquid-cooled plate increased from 30 ml/min to 60 ml/min,the maximum and minimum temperatures of the battery pack decreased considerably,accompanied by a reduction in the maximum temperature difference by 0.458 K and an increase in pressure loss from 352 Pa to 832 Pa.Increasing the depth of the cooling fixed hole led to a gradual decline in the maximum temperature and a corresponding increase in the minimum temperature;both lied within the optimal operating range of lithium-ion batteries.As the hole depth increased from 7 mm to 13 mm,the maximum temperature difference in the battery pack decreased by 20.8%and the weight of the cooling fixed structure increased by 46.2%.At the ambient temperatures of 296.15 K,298.15 K,300.15 K,and 302.15 K,the maximum and minimum temperatures of the battery pack were very close to each other after a charge-discharge cycle,with the maximum temperature difference of the battery pack exhibiting a peak at 302.15 K,which is higher than that at other temperatures.

关 键 词：电池热管理 动力锂电池 液体冷却 

分 类 号：TM911[电气工程—电力电子与电力传动]