Lithium-ion battery thermal management using heat pipe and phase change material during discharge-charge cycle: A comprehensive numerical study
Lithium-ion battery thermal management using heat pipe and phase change material during discharge-charge cycle: A comprehensive numerical study
复制标题
在放电-充电循环期间使用热管和相变材料的锂离子电池热管理：综合数值研究
DOI：
10.1016/j.apenergy.2019.03.043
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发表时间：
2019-05-15
期刊：
影响因子：
11.2
通讯作者：
Qu, Z. G.
中科院分区：
文献类型：
--
作者：
Jiang, Z. Y.;Qu, Z. G.
锂离子电池的热管理是近年来研究的热点问题。在这项研究中，热管理模块与三明治结构组成的电池，相变材料，热管组装。实验研究了电池、热管和相变材料复合材料在三次充放电循环下的温度响应。建立了一个集总热模型，考虑了电池发热、相变材料熔化和热管瞬态热响应的耦合。在不同环境温度、冷凝段传热系数、相变材料与电池厚度比的条件下，揭示了电池温度与相变过程耦合的内在机理。用一次充放电循环的实验数据对模型进行了验证。对于空气对流且仅有相变材料的电池，难以维持连续的安全循环。热管的使用可以在每次循环结束时回收具有适当熔点的相变材料的潜热，以确保长时间循环的低电池温度。四个阶段，即显热，潜热，凝固，和稳定阶段，发现在每个周期的建议冷却模块。然后，确定了电池发热与热管和相变材料传热的耦合机理。热管冷凝段可能运行在不可持续、可持续和不经济的区域。为了同时保证电池温度安全、低能耗、长时间循环时有足够的模块能量密度，建议相变材料熔点至少比环境温度高3 ℃，冷凝器的传热系数建议在30 W/m（2）·K~60 W/m（2）·K之间。. K，最佳厚度比为0.17，相变比约为0.55。
Thermal management of lithium ion battery has become a critical issue in recent years. In this study, a thermal management module with a sandwich structure consisting of a battery, phase change material, and heat pipe is assembled. The battery temperature response is experimentally investigated for battery, heat pipe and phase change material composite with three discharge and charge cycles. A lumped thermal model is built to consider the coupling of battery heat generation, phase change material melting, and transient thermal response of heat pipe. The underlying coupling mechanism of battery temperature and phase change process is revealed at different environmental temperatures, heat transfer coefficients at condensation section, and thickness ratios of phase change material and battery. The model is validated with the experimental data in one discharge/charge cycle. A continuous safe cycling is difficult to maintain for battery with the air convection and only phase change material. The utilization of heat pipe can recover the latent heat of phase change material with an appropriate melting point at the end of each cycle to ensure a low battery temperature for long-time cycling. Four stages, namely, sensible heat, latent heat, solidification, and steady stage, are found in each cycle for the proposed cooling module. Then, the coupling mechanism of battery heat generation and heat transfer in heat pipe and phase change material is identified. The condensation section for heat pipe may operate at the unsustainable, sustainable, and uneconomic regions. To guarantee safe battery temperature, low energy consumption, and sufficient module energy density in long-time cycling simultaneously, the phase change material melting point is recommend to be at least 3 degrees C higher than environmental temperature, and the heat transfer coefficient in the condenser is recommended to range from 30 W/m(2).K to 60 W/m(2).K with an optimum thickness ratio of 0.17 associated with a phase change ratio of approximately 0.55.