Abstract Traditional battery thermal management (BTM) with phase change material (PCM) is constrained by the problems of leakage, low thermal conductivity and high rigidity of PCM from the assembly perspective. Herein, we report an innovative and facile BTM with thermally induced flexible composite PCM (FCPCM). In this design, battery could be clinched to the FCPCM with an interference fit because of the thermally induced flexibility and shape recovery of FCPCM. Such an assembly is designed to be compact and efficient with no need for thermal grease. The steady-state measurement results show that different phase states of PCM have different thermal interface properties. The integration associated with the shape recovery of FCPCM could cause a low thermal contact resistance between battery and FCPCM. As a result, the constructed passive BTM exhibits an excellent thermal control performance. When the battery is discharged from 100% to 0% charge state, the maximum temperature of FCPCM based BTM is 43.4 °C during 2.5C discharge rate, which is 28.8 °C lower than No PCM. For the conditions of dynamic stress test and charge–discharge cycle, it shows lower temperature fluctuation within the acceptable range and the long-time function of latent heat of PCM could be recovered. With these prominent performances, the BTM performed here with respect to assembly methods and process flexibility will provide insights into the passive BTM system.

中文翻译：

---

具有热致柔性相变材料的创新电池热管理

摘要 传统的相变材料（PCM）电池热管理（BTM）在组装方面受到相变材料（PCM）泄漏、低导热性和高刚性等问题的制约。在此，我们报告了一种具有热致柔性复合 PCM (FCPCM) 的创新且简便的 BTM。在这种设计中，由于 FCPCM 的热致柔性和形状恢复，电池可以通过过盈配合固定到 FCPCM。这种组件设计紧凑且高效，无需导热油脂。稳态测量结果表明，不同相态的 PCM 具有不同的热界面特性。与 FCPCM 的形状恢复相关的集成可能会导致电池和 FCPCM 之间的热接触电阻较低。因此，构建的被动 BTM 表现出优异的热控制性能。当电池从 100% 放电到 0% 充电状态时，基于 FCPCM 的 BTM 在 2.5C 放电率期间的最高温度为 43.4°C，比 No PCM 低 28.8°C。在动态应力测试和充放电循环条件下，温度波动较小，在可接受的范围内，并且可以恢复PCM的长时间潜热功能。凭借这些突出的性能，这里在组装方法和工艺灵活性方面执行的 BTM 将提供对无源 BTM 系统的深入了解。在动态应力测试和充放电循环条件下，温度波动较小，在可接受的范围内，并且可以恢复PCM的长时间潜热功能。凭借这些突出的性能，这里在组装方法和工艺灵活性方面执行的 BTM 将提供对无源 BTM 系统的深入了解。在动态应力测试和充放电循环条件下，温度波动较小，在可接受的范围内，并且可以恢复PCM的长时间潜热功能。凭借这些突出的性能，这里在组装方法和工艺灵活性方面执行的 BTM 将提供对无源 BTM 系统的深入了解。