电动汽车动力电池组在低温环境中的高频交流加热策略
1College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China.
ACS omega
|March 25, 2024
概括
本研究介绍了一种高频交流电 (AC) 加热方法,用于在寒冷条件下快速加热离子电池 (LIB). 这种新的方法有效地加热LIB,而不损害其寿命,为电池技术提供了显著的进步.
科学领域:
- 电池技术 电池技术
- 电化学工程 电化学工程
- 热管理 热管理
背景情况:
- 低温显著降低了离子电池的性能和寿命.
- 现有的电池加热方法通常需要额外的电源,或者可能会损坏电池.
- 高效的内部加热对于在寒冷环境中扩展电池应用至关重要.
研究的目的:
- 为内部离子电池 (LIB) 在低温下加热提出和验证高频交流电 (AC) 加热策略.
- 为了平衡快速加热,对电池寿命的影响最小.
- 开发一种电化学热合模型,用于预测电池温度动态.
主要方法:
- 为LiFePO4电池开发一种电化学热合模型.
- 模拟不同C级下的温度上升和分布,使用高频交流.
- 模拟模型和加热策略的实验验证.
- 分析高频交流对电池寿命的影响.
主要成果:
- 拟议的交流加热策略有效地提高了电池的温度,并改善了温度的一致性.
- 模拟和实验证实了该策略能够快速加热电池,而不会影响寿命.
- 在500Hz (4.2C) 观察到最佳加热,在365秒 (3.29K/分钟) 中将电池温度从253.15K提高到278.15K.
结论:
- 高频交流加热是一种可行且高效的低温LIB加热方法.
- 开发的模型准确地预测了电池对交流加热的温度反应.
- 这项技术提供了节能优势,并扩大了LIBs在各种热条件下的潜在应用.
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