Analysis of the Properties of Fractional Heat Conduction in Porous Electrodes of Lithium-Ion Batteries

Abstract

Research on the heat transfer characteristics of lithium-ion batteries is of great significance to the thermal management system of electric vehicles. The electrodes of lithium-ion batteries are composed of porous materials, and thus the heat conduction of the battery is not a standard form of diffusion. The traditional heat conduction model is not suitable for lithium-ion batteries. In this paper, a fractional heat conduction model is used to study the heat transfer properties of lithium-ion batteries. Firstly, the heat conduction model of the battery is established based on the fractional calculus theory. Then, the temperature characteristic test was carried out to collect the temperature of the battery in various operating environments. Finally, the temperature calculated by the fractional heat conduction model was compared with the measured temperature. The results show that the accuracy of fractional heat conduction model is higher than that of traditional heat conduction model. The fractional heat conduction model can well simulate the transient temperature field of the battery. The fractional heat conduction model can be used to monitor the temperature of the battery, so as to ensure the safety and stability of the battery performance.

Recent Advances on Materials for Lithium-Ion Batteries

“…Several issues can affect the performance and durability of the electrode materials, including volume expansion of the electrode during the charge-discharge process [52,53], mechanical failure of the electrodes due to external mechanical/thermal loadings [54,55], thermal failure caused by the battery overheating [56], and tortuosity/percolation limitations [57]. Some suggested solutions for these issues are presented in the following.…”

“…Figure 2 shows the voltage range vs. Li/Li + as a function of charge capacity of these anode active materials [59,60]. [52,53], mechanical failure of the electrodes due to external mechanical/ther [54,55], thermal failure caused by the battery overheating [56], and tortuosity limitations [57]. Some suggested solutions for these issues are presented in t…”

Simple Fabrication of Ti3C2/MnO2 Composites as Cathode Material for High Capacity and Long Cycle Lifespan Zn‐ion Batteries

“…[4][5][6] Lithium-ion batteries typically exhibit long cycle life and high power tolerance, while they have fatal defects such as spontaneous combustion and insufficient lithium storage. [7][8][9][10] Among the rechargeable ion batteries, aqueous rechargeable zinc ion batteries (ZIBs) have been regarded as one of the most valuable energy storage devices because of their superior bulk energy density (5851 mAh cm À3 ), low manufacturing cost, relatively large theoretical capacity (819 mAh g À1 ), and superior stability in air environment. [11][12][13] However, aqueous ZIBs suffer from narrow window voltage, low matchable capacity of cathode, and irreversible by-products of zinc anode during cycling.…”