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Insulating sandwich housing structures for the thermal management of battery packs

机译：绝缘夹层外壳结构，用于电池组的热管理

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Modern electric vehicle battery thermal management systems provide sophisticated means to control the temperature of its battery cells within the optimal temperature range. This is crucial as Lithium-Ion battery cells result in reduced lifespans if exposed to temperatures above 50°C. On the other hand, temperatures below 10°C lead to a reduced capacity and with respect to electric vehicles in reduced driving ranges. The OPTEMUS project therefore develops a thermal insulating battery module housing that thermally disconnects the battery cells from the ambient temperature, providing a more stable temperature profile and more efficient thermal management of the battery. Different housing materials and designs have been developed to provide thermal insulating properties while also withstanding mechanical forces. Based on a concept module design of Fraunhofer LBF, two different fiber reinforced plastic sandwich structures have been manufactured with insulating foam cores and analyzed with respect to their cellular structures and resulting thermal properties. The cellular structure was detected three-dimensionally via computer tomography analysis. The manufactured sub-module housings were tested in a climatic chamber at -10°C and compared to a benchmark housing design based on aluminum as construction material. Results showed that the cell temperatures decrease 250 to 400 % slower using foam core sandwich structures as housing material compared to an aluminum housing while providing large scale manufacturability via the injection molding process.
机译：现代电动汽车电池热管理系统提供了复杂的方法，可将其电池单元的温度控制在最佳温度范围内。这一点至关重要，因为锂离子电池如果暴露在高于50°C的温度下会导致使用寿命缩短。另一方面，低于10℃的温度导致容量减小，并且对于电动汽车而言，导致行驶距离减小。因此，OPTEMUS项目开发了一种隔热电池模块外壳，该模块将电池单元与环境温度热断开，从而提供更稳定的温度曲线和更有效的电池热管理。已经开发了不同的外壳材料和设计以提供隔热性能，同时还承受机械力。基于Fraunhofer LBF的概念模块设计，已经制造出两种具有绝缘泡沫芯的不同纤维增强塑料夹芯结构，并对其泡沫结构和所产生的热性能进行了分析。通过计算机断层扫描分析法三维地检测了细胞结构。所制造的子模块外壳在-10°C的气候室内进行了测试，并与基于铝作为建筑材料的基准外壳设计进行了比较。结果表明，与铝制外壳相比，使用泡沫芯夹层结构作为外壳材料时，电池温度下降的速度降低了250至400％，同时可通过注塑工艺提供大规模的可制造性。

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