Illustration of the thermal conductivity structure of new energy batteries

How to design a thermally optimized lithium-ion battery?

Knowledge of the thermal transport properties of the individual battery components and their combination is required for the design of thermally optimized lithium-ion batteries. Based on this, the limiting components can be identified and potentially improved.

How is thermal conductivity determined?

The effective thermal conductivity of the generated stacked structures is then determined by a numerical tool developed in-house based on the finite-volume method. The results are compared with an analytical model for fast accurate predictions which takes the morphological parameter sets and the geometry of the stacks into account.

Are csgp batteries thermally conductive?

To better explore the thermal management system of thermally conductive silica gel plate (CSGP) batteries, this study first summarizes the development status of thermal management systems of new energy vehicle power batteries to lay a foundation for subsequent research.

Do bulk materials have thermal conductivity?

In addition to the morphological parameter sets, an exact knowledge of the thermal transport properties of the individual bulk materials is necessary for a precise modeling of the effective thermal conductivity. For this purpose, an extensive literature study focusing on the thermal conductivity of the bulk materials was carried out.

What is the difference between numerical and Analytical thermal conductivities?

The effective thermal conductivities of the numerical model deviate by a maximum of 2% from the experimental values and 11% from the analytical model. The numerical and the analytical models show a maximum deviation of 12%. Finally, effective thermal conductivities of both KOKAM cell stacks perpendicular and parallel to the layers were determined.

How does polymerization affect a battery?

As the degree of polymerization increases, the polymer seals the surface of cathode and micropores of separator, disrupting electrode reactions and internal ion transport. This prevents the decomposition of the electrolyte and the onset of TR in the battery.