Development and Research of the Traction Battery Cooling System for the FDR12 Hybrid-Racing Car

Currently, motorsport is one of the most important directions of development in the automotive industry. Vehicle manufacturers (VMs) at such competitions conduct tests of new technical solutions and technologies. To meet increasingly stringent environmental emission requirements, automakers are intensively transitioning to electrified vehicles, which include both pure electric vehicles and vehicles with combined power plants or hybrid vehicles. Hybrid vehicles, in addition to being more environmentally friendly compared to traditional internal combustion engine vehicles, allow increasing the power of the vehicle's power plant through the use of an electric motor, and also have lower fuel consumption due to the use of regenerative braking. This article investigates a hybrid racing car. Its design includes a traction battery (TB), which under severe operating conditions has increased requirements for the cooling system. The cooling system is one of the most important systems of a hybrid vehicle. The purpose of this work is the development and investigation of an immersion cooling system for the traction battery of a hybrid racing car. To achieve this goal, a methodology for mathematical modeling of the traction battery cooling system was developed, the thermal power of the TB was determined, and an effective coolant for the TB cooling system was selected, the TB design was optimized, experimental studies of the TB separately and as part of a hybrid racing car were conducted. The results of experimental studies of the hybrid racing car showed that the temperature of the battery cells of the developed TB with an immersion cooling system does not exceed the maximum permissible values.