Thermal Management Of Cylindrical Lithium-Ion Battery Using A Wavy Tube

Abstract

To maintain a proper temperature range and eliminate local temperature disparities, thermal management is required for lithium-ion batteries in electric vehicles. A wavy tube is presented for a liquid cooling cylindrical lithium-ion battery module in this research. On the suggested battery module, three-dimensional transient simulations were run, and numerical improvements were made by changing the wavy contact angle of the wavy tube.

 The heat dissipation efficiency and temperature field homogeneity of the battery module improve when the wavy contact angle and mass flow rate rise. However, if the wavy contact angle or mass flow rate is raised, the favourable effects decrease because the wavy tube hits its limit in cooling the battery module.

 Experiments were conducted under simulated working settings to verify the battery module's heat transfer capability. The simulation results will provide particular reference values for cylindrical lithium-ion battery module thermal management.

 The circumferential contact area between the wavy tube and the batteries is determined by the wavy contact angle, which has a direct impact on the heat transfer rate from the batteries to the wavy tube and temperature homogeneity inside the battery monomer. A 60-degree contactsfer angle with the battery module has proved to improve working conditions.

At temperatures ranging from 25°C to 50°C, lithium-ion batteries may work efficiently and achieve a good mix of service performance and cycle life. Because of its excellent heat transfer efficiency, liquid cooling has gotten a lot of interest in BTM system research, especially for battery packs that operate at a fast discharge rate. Water is a better coolant than ethylene glycol, according to the results of both the steady state and transient analyses. However, in practice, a mixture of water and ethylene glycol is employed since it has superior characteristic