基于半导体制冷-相变材料的电池热管理  

Thermal management of battery based on thermoelectric cooler-phase change material

作　　者：吴启超 黄瑞[1] 陈芬放 俞小莉[1] WU Qi-chao;HUANG Rui;CHEN Fen-fang;YU Xiao-li(College of Energy Engineering,Zhejiang University,Hangzhou,Zhejiang 310027,China)

机构地区：[1]浙江大学能源工程学院,浙江杭州310027

出　　处：《电池》2022年第2期148-152,共5页Battery Bimonthly

基　　金：中央高校基本科研业务费专项(2020QNA4008);浙江省自然科学基金(LQ20E060008)。

摘　　要：相变材料用于锂离子电池冷却时,可能会受环境温度的影响;半导体制冷片用于电池冷却时,通常要对发热端进行液冷,结构较复杂。为解决上述问题并实现优势互补,提出一种半导体制冷片结合相变材料的锂离子电池热管理思路。建立三维传热模型,进行仿真计算。在散热工况下,环境温度分别为25℃、35℃和45℃时,5 C恒流放电的方形(70 mm×27 mm×90 mm)磷酸铁锂锂离子电池的最高温度始终都在60℃以下;在加热工况下,环境温度为-10℃、-20℃时,使本身不产热的电池的最低温度达到0℃,分别需加热223 s、479 s。该热管理结构既可满足电池在不同环境温度下的散热需求,也可实现低温下较好的加热效果。Phase change materials for Li-ion battery cooling might be affected by ambient temperature.Thermoelectric coolers for battery cooling normally needed liquid-cooling at the hot side, which led to complex structure.In order to solve these problems and achieve complementary advantages, an idea of thermoelectric coolers combined with phase change materials for battery thermal management was proposed.A three-dimensional heat transfer model was established and simulated.In battery cooling condition, when the ambient temperature was 25 ℃,35 ℃ and 45 ℃,the maximum temperature of the square lithium iron phosphate Li-ion battery(70 mm×27 mm×90 mm) with galvanostatic discharge at 5 C was controlled below 60 ℃ all the time.In battery heating condition, when the ambient temperature was-10 ℃ and-20 ℃,it took 223 s or 479 s respectively for heating to make the minimum temperature of the battery reached 0 ℃ without self-generated heat.The structure of thermal management could not only meet the heat dissipation requirements of battery at different ambient temperatures, but also could achieve good heating effect at low temperature.

关 键 词：半导体制冷片(TEC) 相变材料(PCM) 锂离子电池 热管理 仿真 

分 类 号：TM912.9[电气工程—电力电子与电力传动]