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全固态电池的初步研究:在热失控过程中对爆炸形成的评估

Juliette Charbonnel^1,2, Sébastien Dubourg³, Etienne Testard³

¹University Grenoble Alpes, CEA, LITEN, DEHT, 38000 Grenoble, France.

|October 25, 2023

概括

全固态电池仅在5毫秒内表现出极快的热逃跑 (TR),比传统的离子电池快得多. 这种快速的事件产生了相当大的过压,需要对电池组设计进行进一步的安全调查.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
电池技术电池技术

背景情况:

全固态电池 (ASSB) 旨在通过使用金属阳极和固体电解质来提高能量密度和安全性.
尽管设计得到了改进,但ASSB的热安全性仍未得到充分研究.
传统的离子电池 (LIB) 存在热失控风险,需要进行比较安全研究.

研究的目的:

为了研究重新组装的全固态电池的热失控行为.
在ASSB中量化热事件期间的反应动力学和压力生成.
评估ASSB热失控对电池组的潜在安全影响.

主要方法:

重组一个完全固态电池进行受控测试.
在现场进行X射线放射,观察热应力期间的电池内部动态.
高速摄像机录制以捕捉事件的快速进展.
压电传感器测量在热失控过程中产生的空气过压.

主要成果:

在ASSB中观察到极快的热逃跑 (TR) 动力学,持续时间仅为5毫秒.
在热失控事件期间测量了 188 mbar 的显著空气过压.
计算出相当于2.7克TNT的爆炸潜力,尽管该电池本身并不具有爆炸性.
证明ASSB的热失控比传统的离子电池快数量级.

结论:

全固态电池表现出异常快速的热失控,产生显著的压力.
快速的动力学和过压表明电池组完整性和安全性的潜在风险.
进一步的详细研究至关重要,以了解和减轻这些非典型的热行为在ASSBs.

关键词:

癌症癌症癌症癌症计算生物信息学是指计算机生物信息学.医疗信息学医疗信息学病理学病理学病理学

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