期刊
JOURNAL OF POWER SOURCES
卷 491, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.229624
关键词
Inorganic composite phase change material and expanded graphite; Thermal management Li-Ion battery; Magnesium chloride/nitrate hexahydrate mixture; Paraffin wax; Electrical cycling; Thermal runaway propagation
资金
- AllCell Technologies, LLC (Chicago, IL-USA)
- CONICYT-PCHA/Doctorado Nacional para Estudiantes Extranjeros [2014/Folio 63140052]
- ANID/FONDAP [15110019 SERC-Chile]
- FONDECYT/REGULAR [1170675]
The study examined the use of inorganic phase change materials (PCM) in lithium-ion batteries for thermal control, demonstrating improved stability and safety compared to traditional materials. The use of inorganic PCMs offers a viable and cost-effective alternative with positive environmental and economic impacts.
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 degrees C, while all CPCM packs remain around 30 degrees C, demonstrating similar behavior. At 1C discharge, No-CPCM pack reaches 49 degrees C, whereas the CPCM packs do not exceed 40 degrees C. At 2C discharge, the No-CPCM pack over-passed the safety limit of 65 degrees C and was stopped before completing the first discharge. The CPCM packs successfully completed the cycling. Studies performed at 45 degrees C demonstrate a similar trend, but with higher peak temperatures. Nail penetration testing proved that the inorganic CPCM. inhibited the pack from self-accelerated degradation, successfully prevented thermal runaway propagation and potential explosion. Low cost and incombustibility make inorganic PCMs. viable alternative to the organic PCMs, with a positive impact on environmental and economic issues. [GRAPHICS]
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