Fast and ultra-fast charging can create tremendous thermal stresses on a battery pack and may cause battery failure or a reduction in its service life. To tackle this issue a new and efficient battery thermal system is proposed. The originality of this system lies in the use of a highly advanced fluid that allows excellent thermal performance by direct contact with the electrochemical cells. A bench test was designed to measure the cooling properties of this system at the cell level and then demonstrate its efficiency. Numerical show an excellent agreement with the experimental data. These results allow the simulation at the battery pack level to be scaled up. An ultra-fast charging scenario (350 kW) was simulated for a 60 kWh battery pack: temperature inhomogeneity or maximal temperature appears to be under control. Lastly, to assess the performance of this battery thermal management system a holistic approach is made by considering parameters for the pumps required for this system (weight and consumption), but also parameters concerning the types and sizes of heat exchangers. Ultimately this enables a global view of the system (performance, weight, power consumption) in order to compare it easily with current solutions.
Thermal Management System for High Performance Battery Based on an Innovative Dielectric Fluid
Proceedings
2021-04-14
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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