Hanning Fan, Yong Zhao
As a widely used energy storage device today, precise characterization of the internal temperature distribution within lithium-ion batteries is imperative for enhancing battery efficacy and guaranteeing safety.In this paper, the research status of internal temperature field estimation of lithium batteries is introduced and summarized. First, different types of temperature sensors, are discussed and their advantages and disadvantages are compared. Secondly, the thermal characteristics of the lithium battery and the impact of pertinent parameters on the temperature field was systematically examined and analyzed. Then, the modeling methods of temperature field of lithium battery are described in detail, including electrochemical-thermal coupling model, electric-thermal coupling model and thermal abuse model. Finally, different algorithms for the estimation of internal temperature field of lithium battery are discussed, such as extended Kalman filter, recursive least square method, unscented Kalman filter, etc., and their application in the estimation of internal temperature of lithium battery is analyzed with examples. In general, in-depth understanding of the internal temperature distribution of lithium batteries helps to predict the temperature change during charging and discharging, and improve the performance and safety of the battery.
Lithium-ion batteries; temperature monitoring; thermal models; internal temperature estimation