Many governments mandate rapid electrification of cars to limit carbon dioxide emissions from the private transport sector. The performance requirements for batteries are increasing due to high currents arising from ultra-fast charging, dynamic driving, increasing energy density and more demanding system safety requirements. Conventional indirect battery cooling systems with glycol/water can not sufficiently control the battery temperatures which then in turn can lead to reduced battery life. It has been demonstrated that immersive battery design with new dielectric cooling fluids can significantly improve thermal management performance of batteries under fast charging conditions allowing high charging and discharging rates. Safety performance of immersive battery systems has been demonstrated with different cell form factors by successfully passing the abuse test requirements. Material compatibility of the new cooling fluids with typical construction materials and material impact on dielectric fluid properties have been evaluated. Accelerated aging tests demonstrated life-time performance of battery systems with the new cooling fluid types.
Thermal management of e-drivetrains through new cooling fluids
Proceedings
International ATZ Conference ; 2022 ; Wiesbaden, Deutschland April 05, 2022 - April 06, 2022
2024-06-30
14 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Deutsch