开放电路电压模型应该是热力学一致的
Archie Mingze Yao1, Venkatasubramanian Viswanathan1,2
1Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.
The journal of physical chemistry letters
|January 24, 2024
概括
本研究介绍了电池的热力学上一致的开放电路电压 (OCV) 模型,确保遵守热力学第二定律. 这种新型号与电池建模软件无集成,提高了离子电池性能预测的准确性.
科学领域:
- 电池技术 电池技术
- 热力学是一种热力学.
- 计算材料科学科学 计算材料科学
背景情况:
- 开放电路电压 (OCV) 模型对于电池性能模拟至关重要.
- 当前的经验OCV模型往往忽视了适配灵活性的热力学原理.
- 热力学第二定律要求具有充电状态 (SOC) 的单调OCV行为.
研究的目的:
- 开发一个符合热力学第二定律的热力学一致的OCV模型.
- 为了使高效的参数优化OCV模型使用梯度基于的方法.
- 将新的OCV模型集成到开源电池建模软件中.
主要方法:
- 提出了使用可微分热力学建模的热力学一致的OCV模型.
- 制定了共同触角条件作为一个固定点问题.
- 应用隐式函数定理用于基于梯度的参数优化.
- 将模型与PyBaMM集成为伪2D放电模拟.
主要成果:
- 证明了该模型对12种流行电极材料的适用性.
- 展示了与PyBaMM电池建模软件的无集成.
- 验证了模型的热力学一致性和参数优化的效率.
结论:
- 热力学一致的OCV模型对于准确的离子电池建模至关重要.
- 拟议的模型为OCV建模提供了一种简单而有效的方法.
- 这项工作倡导在未来的电池研究中强制使用热力学一致的OCV模型.
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