Heat transfer principle of lithium battery

What is a lithium ion battery heat transfer model?

Battery Heat Transfer Model Heat conduction and heat convection are the primary modes of heat transfer for lithium-ion batteries during typical operation. However, heat radiation is typically negligible due to the low temperatures involved.

How does a lithium battery produce heat?

Heat is generated in the battery through the movement of lithium ions from the cathode to the anode, resulting in a sequence of chemical reactions within the battery that produce heat.

Are lithium-ion batteries a heat source or a thermal transport system?

Heat Generation and Thermal Transport in Lithium-Ion Batteries: A Scale-Bridging Perspective Lithium-ion batteries (LIBs) are complex, heterogeneous systems with coupled electrochemical and thermal phenomena that lead to elevated temperatures, which, in turn, limit safety, reliability, and performance.

Why does lithium ion deficiency affect battery heat generation?

It is difficult for lithium-ions to diffuse to the particle surface and react with the electrolyte at subzero temperature. As a result, the SOC on the NE surface decreases rapidly, causing the deficiency of lithium-ions and increasing the resistance and thus the battery heat generation significantly.

Do lithium-ion batteries need thermal simulations?

Building upon advancements in the numerical simulations of lithium-ion batteries (LIBs), researchers have recognized the importance of accurately modeling the internal thermal behavior of these cells to ensure their protection and prevent thermal failures [11, 12].

How to improve the thermal safety of lithium ion batteries?

It is therefore significant to improve the safety, firstly by preventing overheat of individual battery, and secondly by avoiding thermal propagation to mitigate the failure of adjacent batteries. Alternatively, the thermal safety of LIBs can be enhanced by equipping effective cooling and fire-extinguishing approach.