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Development of the inorganic composite phase change materials for passive thermal management of Li-ion batteries: Application
Journal of Power Sources ( IF 8.1 ) Pub Date : 2021-02-11 , DOI: 10.1016/j.jpowsour.2021.229624
Yana Galazutdinova , Svetlana Ushak , Mohammed Farid , Said Al-Hallaj , Mario Grágeda

In this study, two inorganic phase change materials (PCM) were tested to be used for thermal control of lithium-ion batteries. Paraffin wax was used as a reference material. To increase thermal conductivity, the PCMs were impregnated into the expanded graphite matrix, forming composite PCM (CPCM). Four types of Li-ion battery packs were manufactured to show the difference in performance between the packs with various CPCMs and No-CPCM.

Electrical cycling studies at ambient temperature showed that at C/2 discharge the No-CPCM pack surpasses 35 °C, while all CPCM packs remain around 30 °C, demonstrating similar behavior. At 1C discharge, No-CPCM pack reaches 49 °C, whereas the CPCM packs do not exceed 40 °C. At 2C discharge, the No-CPCM pack overpassed the safety limit of 65 °C and was stopped before completing the first discharge. The CPCM packs successfully completed the cycling. Studies performed at 45 °C demonstrate a similar trend, but with higher peak temperatures. Nail penetration testing proved that the inorganic CPCMс inhibited the pack from self-accelerated degradation, successfully prevented thermal runaway propagation and potential explosion. Low cost and incombustibility make inorganic PCMs а viable alternative to the organic PCMs, with a positive impact on environmental and economic issues.



中文翻译:

用于锂离子电池被动热管理的无机复合相变材料的开发:应用

在这项研究中,测试了两种无机相变材料(PCM)用于锂离子电池的热控制。石蜡用作参考材料。为了提高导热率,将PCM浸入膨胀的石墨基体中,形成复合PCM(CPCM)。制造了四种类型的锂离子电池组,以显示具有各种CPCM和No-CPCM的电池组之间的性能差异。

在环境温度下进行的电循环研究表明,在C / 2放电时,No-CPCM电池组的温度超过35°C,而所有CPCM电池组的温度都保持在30°C左右,这表现出相似的行为。在1C放电时,No-CPCM电池组温度达到49°C,而CPCM电池组温度不超过40°C。在2C放电时,No-CPCM电池组超过了65°C的安全极限,并在完成第一次放电之前停止运行。CPCM包成功完成了循环。在45°C下进行的研究表明了类似的趋势,但峰值温度更高。钉子渗透测试证明,无机CPCM®抑制了包装的自加速降解,成功地防止了热失控扩散和潜在爆炸。低成本和不燃性使无机PCM成为有机PCM的可行替代品,

更新日期:2021-02-12
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