Passive protection containment of high temperature and impact hazards from thermal runaway in aviation power lithium batteries

YANG Juan; LIANG Yanpeng; LIU Yuan; LIU Tiantian; ZHANG Qingsong

doi:10.11883/bzycj-2024-0240

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YANG Juan, LIANG Yanpeng, LIU Yuan, LIU Tiantian, ZHANG Qingsong. Passive protection containment of high temperature and impact hazards from thermal runaway in aviation power lithium batteries[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0240

Citation:

YANG Juan, LIANG Yanpeng, LIU Yuan, LIU Tiantian, ZHANG Qingsong. Passive protection containment of high temperature and impact hazards from thermal runaway in aviation power lithium batteries[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0240

Citation:

YANG Juan, LIANG Yanpeng, LIU Yuan, LIU Tiantian, ZHANG Qingsong. Passive protection containment of high temperature and impact hazards from thermal runaway in aviation power lithium batteries[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0240

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Passive protection containment of high temperature and impact hazards from thermal runaway in aviation power lithium batteries

doi: 10.11883/bzycj-2024-0240

YANG Juan^{1, 2
,},
LIANG Yanpeng³,
LIU Yuan³,
LIU Tiantian⁴,
ZHANG Qingsong^{1, 3
,
,}

1.
Key Laboratory of Technology and Equipment of Tianjin Urban Air Transportation System, Civil Aviation University of China, Tianjin 300300, China
2.
Engineering Techniques Training Center, Civil Aviation University of China, Tianjin 300300, China
3.
College of Safety Science and Engineering, Civil Aviation University of China, Tianjin 300300, China
4.
Shanghai Neothrust Company Limited, Shanghai 200000, China

Received Date: 2024-07-16
Rev Recd Date: 2024-09-22

Available Online: 2024-09-23

Abstract

Abstract

The thermal shock caused by thermal runaway of lithium batteries will damage the installation structure and pose a threat to the safety of surrounding personnel and equipment, which is a key issue limiting their aviation applications. Through a self-built high-temperature impact experimental platform for lithium battery thermal runaway, it was found that the impact pressure on the battery pack top plate from single-cell thermal shock can reach up to 13.23 kPa, causing the external surface temperature to exceed 274 ℃. The combined effect of high temperature and impact pressure increases the risk of the casing undergoing plastic deformation, buckling, or even failure. To effectively mitigate such risks, a passive protection method of coating the top plate of the battery pack with fireproof coating is proposed. Through large panel combustion experiments and cone calorimeter tests, it was found that the epoxy resin-based intumescent fireproof coatings can effectively block the impact pressure of lithium battery thermal runaway by expanding, and they absorb heat, reducing and delaying the temperature rise of the battery pack top plate, demonstrating excellent thermal shock resistance. By comparing the containment effects of fireproof coatings of different thicknesses, it was found that the 1mm coating is more suitable for practical application needs. Referring to relevant airworthiness regulations, verification tests were conducted on the containment of lithium battery thermal runaway. The analysis of the experiment results shows that the 1.0 mm thick E80S20 coating and E85S15B3 coating reduced the maximum temperature of the battery pack top plate by 52.16% and 55.80%, respectively. Additionally, the maximum structural deformation decreased by 72.2% and 44.4%, respectively. The study indicates that passive protection technology of fireproof coating can effectively enhance the containment of high temperatures and impact hazards caused by thermal runaway. This approach can serve as an effective measure in the safety design of aviation power lithium battery systems.
- lithium batteries thermal runaway,
- thermal shock,
- fire retardant coatings,
- passive protection,
- thermal runaway containment

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References(29)

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