A thermal-optimal design of lithium-ion battery for the container storage system

Abstract

In this paper, the permitted temperature value of the battery cell and DC-DC converter is proposed. The flow and temperature field of the lithium-ion batteries is obtained by the computational fluid dynamic method. Thus, the package structure of the battery pack is optimized based on four influencing factors. The results indicate that (1) setting a new inlet on the wall, I can improve ventilation and the inlet is better located below the waist of the battery pack. (2) Air inlet location close to the fan is easy to generate short air circuit, which leads to DC-DC converter in poor condition of heat dissipation. (3) Adjusting the size of the air inlet mainly affects the temperature distribution of the cells but has little effect on the temperature of the DC-DC converter. (4) Regulating the gap size can enhance the cell temperature uniformity. (5) The optimized battery pack structure is obtained, where the maximum cell surface temperature is 297.51 K, and the maximum surface temperature of the DC-DC converter is 339.93 K. The above results provide an approach to exploring the optimal design method of lithium-ion batteries for the container storage system with better thermal performance.