Fuel cell power system matching and heat exchange design
Power matching for fuel cell vehicles can ensure the power demand of the whole vehicle,while optimising the thermal management system can improve the performance of the battery and reduce the energy consumption of the thermal man-agement system.A system model using AMESim software was established and the characteristics of the thermal management sys-tem under NEDC operating conditions was analyzed.The results show that the average temperature of the stack in the single large-cycle loop is 67 ℃,and the average temperature of the stack in the large and small double-cycle loops is 61.5 ℃.The tem-perature of the fuel cell using the double-cycle loop is controlled to be within 61.5～78.5 ℃.Compared with the single large-circulation circuit,the dual-circulation circuit shows the advantages of stability in the control of coolant temperature difference,with the coolant temperature difference of about 5.5 ℃ in the single large-circulation circuit and about 3.5 ℃ in the dual-cir-culation circuit.In addition,the double-circulation loop can reduce the power consumption of the water pump,the average val-ue ofthe water pump speed is 12.4％lower than the single large-circulation loop.The dual-circulation heat transfer design proposed will provide a reference for temperature control and energy saving in fuel cell power systems for commercial vehicles.
PEMFCAMESim simulationTemperature control strategyPowertrain matching
NETL
NSTL
万方数据
