(58m) Safety Improvement and Thermal Management of Cylindrical Lithium-Ion Batteries Using Phase Change Materials (PCMs)

1. M. Sadrameli^*, Y. Azizi,

Process Engineering Department, Faculty of Chemical Enginering,

Tarbiat Modares University (TMU), Tehran, Iran.

Abstract

Lithium-ion batteries (LIBs) have shown to be one of the most reliable energy storage systems for the electric cars and motorcycles in the recent years. Ambient temperature has a significant impact on the performance, life time, safety and cost of such batteries. Increasing the surface temperature during the charging and discharging degrades the lithium batteries more quickly while working at low temperature environment results reducing the power and energy capability of the system. A thermal management system has been designed and setup in laboratory scale for controlling the temperature at optimum conditions using PEG-1000 with melting point in the range of 33-40 ^oC as a phase change material. Aluminum plates have been installed in the PCM to increase the thermal conductivity and increasing the heat transfer rate. Experimental tests have been run at different discharge rates and ambient temperatures to investigate the effects of temperature on the efficiency of the batteries. The comparison has been made between the system of 6 batteries with and without PCM and the results show that PCM with aluminum plates decrease the surface temperature of the batteries by 19%, 21%, and 26% for the rates of 1 C, 2C, and 3 C respectively that would results better performance and longer life time of the batteries.

Keywords: Lithium-ion batteries; thermal management; temperature control, phase change materials

• Corresponding author, Email:sadrameli@modares.ac.ir