This paper proposes a hybrid cooling system which combines a commercial bottom liquid cooling system and a novel dielectric flexible composite phase change material (FCPCM). This hybrid cooling system ensures the safety and high performance of Lithium-ion battery under abuse conditions, such as a high-rate discharge of 6C and a high ambient temperature of 40 ℃. The cooling performances of different thermal management modes are compared to demonstrate the superiority of the hybrid cooling system. The results indicated that the single bottom liquid cooling system induced a large temperature difference over 7 °C, while the temperature difference decreased to 3.2 °C with the addition of FCPCM. Then, operating conditions such as inlet temperature, inlet flow rate, discharge rate, and ambient temperature on the cooling performance are investigated. Under a high ambient temperature of 38 °C, a charge–discharge cycle test is conducted to rank the effectiveness of the hybrid cooling system during long-term operation. The temperature and temperature difference of the battery pack were below 45 °C and 4 °C, respectively, in four charge–discharge cycles.

本文提出了一种混合冷却系统，它结合了商业底部液体冷却系统和新型介电柔性复合相变材料 (FCPCM)。这种混合冷却系统确保了锂离子电池在6C高倍率放电和40℃高环境温度等滥用条件下的安全性和高性能。比较不同热管理模式的冷却性能，以证明混合冷却系统的优越性。结果表明，单底液冷系统引起的温差超过 7°C，而加入 FCPCM 后温差降低到 3.2°C。然后，研究了诸如入口温度、入口流速、排放速率和环境温度等操作条件对冷却性能的影响。在 38 °C 的高环境温度下，进行充放电循环测试，以对混合冷却系统在长期运行期间的有效性进行排序。在四个充放电循环中，电池组的温度和温差分别低于 45°C 和 4°C。