• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>IEEE Vehicle Power and Propulsion Conference >Preliminary Study on the Influence of Internal Temperature Gradient on EIS Measurement and Characterization for Li-Ion Batteries
【24h】

Preliminary Study on the Influence of Internal Temperature Gradient on EIS Measurement and Characterization for Li-Ion Batteries

机译：内部温度梯度对锂离子电池EIS测量和表征的影响的初步研究

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Battery characteristics in the conditions with/without internal temperature gradient are believed to be different, which imposes difficulty in characterization and modeling of the performance of battery cells, and relatively few studies have conducted the investigation of the effects of thermal gradients on battery characteristics. This paper makes a preliminary study on the influence of internal temperature gradient on EIS (electrochemical impedance spectroscopy) measurement and characterization. Several experiments are designed and implemented to facilitate the investigation. Experimental results and analysis show that the dependence of cell impedance on temperature can be fitted with the Arrhneius law, and the effect of SOC on the impedance is not as much as that of temperature. Moreover, the presence of the temperature gradients decreases the cell impedance when compared to the conditions without temperature gradients, and the higher the gradient, the smaller the amplitude of the measured impedance. With the equivalent circuit model fitting of the EIS measurements, it is found that the temperature gradient mainly influences Rsei and Rct. Based on analysis, a method to use the identified Rsei and Rct under different temperature gradients to re- construct the possible internal temperature distribution of the battery cell is also proposed.
机译：据信在具有/不具有内部温度梯度的条件下的电池特性是不同的，这给电池单元的性能表征和建模带来了困难，并且相对较少的研究已经进行了关于温度梯度对电池特性的影响的研究。本文对内部温度梯度对EIS（电化学阻抗谱）测量和表征的影响进行了初步研究。设计并实施了一些实验以方便调查。实验结果和分析表明，电池阻抗对温度的依赖性可以符合阿伦尼乌斯定律，SOC对阻抗的影响不如温度大。而且，与没有温度梯度的条件相比，温度梯度的存在降低了电池单元的阻抗，并且梯度越高，测得的阻抗的幅度越小。通过EIS测量的等效电路模型拟合，发现温度梯度主要影响Rsei和Rct。基于分析，还提出了一种在不同温度梯度下使用识别出的Rsei和Rct来重建电池单元内部温度分布的方法。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号