A hybrid thermal management system for lithium ion batteries combining phase change materials with forced-air cooling
A hybrid thermal management system for lithium ion batteries combining phase change materials with forced-air cooling
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DOI：
10.1016/j.apenergy.2015.03.080
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发表时间：
2015-06-15
期刊：
影响因子：
11.2
通讯作者：
Zhang, Zhengguo
中科院分区：
文献类型：
--
作者：
Ling, Ziye;Wang, Fangxian;Zhang, Zhengguo
采用相变材料的被动式热管理系统为解决锂离子电池的过热问题提供了有效的解决方案。但这项研究表明，空气自然对流的无效冷却导致相变材料中的热量积累导致了热管理系统的故障：在1.5℃和2℃放电率的两个循环后，连续运行的电池组中的温度超过了60℃的安全限值。这一组合系统成功地防止了热量积累，并在所有循环中将最高温度保持在50摄氏度以下。对空速效应的研究表明，相变材料的热物性决定了电池组的最大温升和温度均匀性，而强迫空气对流对相变材料的储热能力的恢复起着关键作用。文中还进行了数值研究，并用实验数据进行了验证，为研究这种混合电池热管理系统的热物性变化提供了理论依据。(C)2015爱思唯尔有限公司。保留所有权利。
Passive thermal management systems using phase change materials (PCMs) provides an effective solution to the overheating of lithium ion batteries. But this study shows heat accumulation in PCMs caused by the inefficient cooling of air natural convection leads to thermal management system failures: The temperature in a battery pack operating continuously outranges the safety limit of 60 degrees C after two cycles with discharge rate of 1.5 C and 2 C. Here a hybrid system that integrates PCMs with forced air convection is presented. This combined system successfully prevents heat accumulation and maintains the maximum temperature under 50 degrees C in all cycles. Study on airspeed effects reveals that thermo-physical properties of PCMs dictate the maximum temperature rise and temperature uniformity in the battery pack, while forced air convection plays a critical role in recovering thermal energy storage capacity of PCMs. A numerical study is also carried out and validated with experiment data, which gives theoretic insights on thermo-physical changes in this hybrid battery thermal management system. (C) 2015 Elsevier Ltd. All rights reserved.