Multi-Electrode Resistivity Probe for Investigation of Local Temperature Inside Metal Shell Battery Cells via Resistivity: Experiments and Evaluation of Electrical Resistance Tomography

Energies

Xiaobin Hong¹  Nianzhi Li¹  Jinheng Feng¹  Qingzhao Kong²  Guixiong Liu¹ 

[1] School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; E-Mails:;Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA; E-Mail:

关键词: local temperature;    electrical resistance tomography;    metal shell battery;    resistivity;    thermal safety;   

DOI  :  10.3390/en8020742

来源: mdpi

【 摘 要 】

Direct Current (DC) electrical resistivity is a material property that is sensitive to temperature changes. In this paper, the relationship between resistivity and local temperature inside steel shell battery cells (two commercial 10 Ah and 4.5 Ah lithium-ion cells) is innovatively studied by Electrical Resistance Tomography (ERT). The Schlumberger configuration in ERT is applied to divide the cell body into several blocks distributed in different levels, where the apparent resistivities are measured by multi-electrode surface probes. The investigated temperature ranges from −20 to 80 °C. Experimental results have shown that the resistivities mainly depend on temperature changes in each block of the two cells used and the function of the resistivity and temperature can be fitted to the ERT-measurement results in the logistical-plot. Subsequently, the dependence of resistivity on the state of charge (SOC) is investigated, and the SOC range of 70%–100% has a remarkable impact on the resistivity at low temperatures. The proposed approach under a thermal cool down regime is demonstrated to monitor the local transient temperature.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.