TY - JOUR
TI - Experimental exploration of finned cooling structure for the thermal management of lithium batteries with different discharge rate and materials
AU - Wang Shixue
AU - Li Kaixiang
AU - Gao Ming
AU - Wang Junyao
JN - Thermal Science
PY - 2020
VL - 24
IS - 2
SP - 879
EP - 891
PT - Article
AB - Lithium-ion batteries (LIBs) in electric vehicles (EV) generate heat  continuously, leading to high temperature of the battery packs and  significant temperature differences between the battery cells, which  eventually deteriorate the performance and lifespan of LIBs. Therefore, a  novel battery thermal management system (BTMS) that equipped the battery  pack with fins was proposed and experimentally studied in this paper. The  thermal behavior of LIBs with different discharge rates and fin thicknesses  was investigated. The results show that under natural convection conditions,  the addition of fins restricted the significant increase of the battery pack  temperature and improved the uniformity of temperature distribution in the  battery pack. Additionally, thicker fins satisfied the temperature  requirements at higher discharge rates and greater discharge depths. Under  condition of 2C discharge at 80% DOD, compared to no clearance structure the  1mm and 3mm aluminum finned structure decreased the maximum temperature rise  and the maximum temperature difference by 26.5%, 40.8% and 9.5%, 33.3%  respectively. However, the trade-offs and optimization between the thermal  load, weight, and volume increase caused by the addition of fins should be  further investigated.