リチウムイオン電池の熱放射線耐性に関する研究
Mengbai Ma1,2, Shiqiang Wang1,2, Hui Jiang1,2
1State Key Laboratory of Chemical Safety Qingdao 266104 China mamb.qday@sinopec.com.
RSC advances
|August 27, 2025
まとめ
リチウムイオン電池 (LIB) は,熱脱出 (TR) の際に安全リスクをもたらします. この研究では,リチウム鉄リン酸 (LFP) バッテリーがニッケル・マンガネス・コバルト (NCM) バッテリーよりも熱放射線耐性が高く,安全なエネルギー貯蔵と電気自動車に不可欠であることが判明しました.
科学分野:
- 材料科学
- 電気化学
- エネルギー貯蔵
背景:
- リチウムイオン電池 (LIB) はエネルギー貯蔵と電気自動車に不可欠ですが,特に熱脱出 (TR) に関する安全性は重要な問題です.
- LIB の TR は危険な火災や爆発を引き起こすため,様々なトリガー条件下での耐性に関する研究が必要である.
- 外部熱放射線下でのTRを理解することは,より安全なLIBシステムと運用プロトコルの設計に不可欠です.
研究 の 目的:
- リチウム鉄リン酸 (LFP) とニッケルマンガネスコバルト (NCM) の電池の異なるレベルの外熱放射線下での熱脱出耐久性を調査する.
- LFPとNCMの電池の熱放射線耐性の値とゾーンを決定する.
- LFPとNCMの電池がTR前に耐える熱放射線被曝期間に関する予測モデルを開発する.
主な方法:
- LFPとNCM電池の実験試験は,外部の熱放射線の度合いが異なる.
- 異常気象の観測と記録
- 耐性期間を予測するための実験データに基づく数学的モデルの開発.
主要な成果:
- LFP電池は,NCM電池 (1.158kW m−2) に比べて,より高い熱放射線耐受性の値を示した.
- LFPとNCMの両方のバッテリー化学について,明確な熱脱出現象と許容領域が特定されました.
- 耐性期間を正確に予測するモデルが開発され,適合度が高い (NCMのR2 = 0. 96166,LFPのR2 = 0. 97698).
結論:
- LFP電池は,NCM電池と比較して,熱放射線耐久性に関して優れた安全性能を提供します.
- 開発された予測モデルは,特定の熱放射線条件下での熱脱出までの時間を正確に推定できます.
- この研究は,外部熱源にさらされるLIBシステムの安全設計と運用ガイドラインの強化に不可欠なデータを提供します.
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