This paper presents a study on the thermal management system of a 100 kW proton exchange membrane hy-drogen fuel cell(PEMFC).The system is designed with a size cycle structure,carries out the analysis of heat dissipation of the PEMFC stack and the selection of key components,and builds a one-dimensional model of the thermal management subsystem based on the Amesim platform.Additionally,a hydrogen fuel vehicle model and a driver model are introduced to reduce the difficulty of modelling.Based on this model,this paper designs a fuzzy controller and optimises its affiliation function using the whale optimisation algorithm to regulate the temperature of the PEMFC stack by controlling the speeds of the cooling fan and cooling water pump.At the same time,Amesim/Simulink co-simulation analysis is carried out under customised operating conditions and new European driving cycle(NEDC)conditions,and the simulation results show that the improved fuzzy controller has a better control performance,smoother temperature change,and a better stability of the thermal management system under the two operating conditions.Additionally,the temperature of the PEMFC stack also shows a small oscillation during the drastic change of the operating conditions.