Thermal and electrical performance evaluations of series connected Li-ion batteries in a pack with liquid cooling
Thermal and electrical performance evaluations of series connected Li-ion batteries in a pack with liquid cooling
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DOI：
10.1016/j.applthermaleng.2017.10.029
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发表时间：
2018-01-25
影响因子：
6.4
通讯作者：
Fowler, M.
中科院分区：
文献类型：
--
作者：
Malik, M.;Dincer, I.;Fowler, M.
锂离子电池因其标称续航里程宽、功率密度高而广泛应用于电动汽车和混合动力汽车。但是，工作温度对电池的热学性能和电学性能有明显的影响，需要保持在规定的范围内。在目前的研究中，锂离子电池组在恒流放电率（例如1C， 2C, 3C, 4C）和液体冷却的实际驱动循环下进行了测试。实验采用冷板，在10℃、20℃、30℃、40℃的冷却液温度下进行，获取热、电参数。为此，将三个20Ah的LiFePO4柱状电池串联起来，并设计和开发了用于液体冷却的电池热管理系统。为了测量温度变化，在所有三个电池的主表面上安装了18个热电偶：即每个电池上安装6个热电偶。结果表明，当冷却液温度为30℃时，在所有四种选择的放电速率下，电池组的温度都能保持在要求的范围内。随着冷却液温度的升高，电池组的放电容量增加，当冷却液温度为40℃时，放电速率为1C时，电池组的放电容量最大达到19.11 Ah。版权所有。
Lithium-ion batteries are widely used in electric and hybrid electric vehicles due to their wide nominal range and high power densities. However, operating temperature, which has a pronounced effect on battery thermal performance and electrical performance, needs to be maintained within a specified range. In the present study, a Li-ion battery pack has been tested under constant current discharge rates (e.g. 1C, 2C, 3C, 4C) and for a real drive cycle with liquid cooling. The experiments are performed using cold plates at 10 degrees C, 20 degrees C, 30 degrees C, and 40 degrees C coolant temperatures to obtain thermal and electrical parameters. For this, three 20Ah LiFePO4 prismatic cells are connected in series and a battery thermal management system is designed and developed for liquid cooling. To measure the temperature variation, 18 thermocouples are installed on the principal surface of all three cells: i.e., six on each cell. The results show that the battery pack temperature can be maintained within the required range at all four selected discharge rates with the coolant at 30 degrees C. The discharge capacity of the battery pack increases with increasing coolant temperature and is found to achieve a maximum of 19.11 Ah at a 1C discharge rate with the coolant at 40 degrees C. (C) 2017 Elsevier Ltd. All rights reserved.