在微型过充电时在不同温度下衰老的电池中的故障机制和热逃逸
Zhizu Zhang1, Changwei Ji1, Yanan Wang1
1College of Mechanical and Energy Engineering, Beijing Lab of New Energy Vehicles, Key Lab of Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China.
在微型过充循环期间,电池的老化受到温度的影响,导致材料故障和树突形成. 温度是电池安全和管理系统的最关键因素.
科学领域:
- 电池技术是电池的技术.
- 材料科学是一种材料科学.
- 电化学 电化学 电化学
背景情况:
- 微型过充电周期加速电池的老化.
- 温度显著影响电池性能和安全.
研究的目的:
- 研究在不同温度下微型过充电下的电池衰老机制.
- 分析热稳定性和故障模式的变化.
- 确定温度对电池安全性的影响.
主要方法:
- 扫描电子显微镜 (SEM) 用于材料分析.
- 能量分散光谱 (EDS) 用于元素组成.
- 在不同温度下控制微型过充电循环.
主要成果:
- 电池故障与阴极破裂,阳极材料粉碎和树生长有关.
- 失败的电池显示热稳定性降低,质量损失增加.
- 在同热条件下,微型过充会导致在没有热失控的情况下发生故障.
结论:
- 温度是影响微型过充电期间电池安全的主要因素.
- 了解这些故障机制对于开发先进电池管理系统至关重要.
- 洞察力支持设计更可靠,更安全的电池技术.
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