Abstract:

Effective thermal management is crucial for the efficient operation of fuel cell vehicles （FCVs）. Fuel cell vehicle thermal management often adopts independent management methods for each subsystem， but this independent method cannot effectively utilize its own waste heat to improve thermal management efficiency and range. In this regard， a vehicle integrated thermal management （VITM） system that utilizes fuel cell waste heat is developed in this paper. The VITM uses a heat exchanger to achieve waste heat recovery of fuel cells and efficient thermal management of various components. The flexible management of each circuit decoupling is achieved through the integrated design of six-way valves. And simulation research on thermal management is conducted on the AMESim simulation platform. The results show that the VITM system developed in this paper can maintain the stability of various components of fuel cell vehicles within the specified operating temperature range. At an ambient temperature of -10 ℃， compared with direct heating mode， a heat pump air conditioner using fuel cell waste heat as a heat source to heat the power battery， the heating time is reduced by 55%.The heating time for the passenger compartment is reduced by 85%， and the energy consumption ratio （COP） value is 4， resulting in a 75% reduction in energy consumption.

Key words: fuel cell vehicles, integrated thermal management, waste heat recovery