Fuel cell vehicle thermal management system with cold start function and control method thereof

Abstract

The invention discloses a fuel cell automobile thermal management system with the cold start function. The system comprises a fuel cell stack, an electronic water pump, an electronic thermostat, a cold start heater, a first electromagnetic valve, a thermal management controller and an air inlet preheating heat exchanger. The electronic water pump, the electronic thermostat, the cold start heater and the first electromagnetic valve are all electrically connected with the thermal management controller. The cooling liquid outlet of the fuel cell stack is connected with the liquid inlet of the electronic water pump. The liquid outlet of the electronic water pump is connected with the liquid inlet of the electronic thermostat and the liquid inlet of the first electromagnetic valve. The first liquid outlet of the electronic thermostat is connected with the liquid inlet of the cold start heater. The liquid outlet of the cold start heater is connected with the liquid inlet of the fuel cell stack. The liquid outlet of the first electromagnetic valve is connected with the liquid inlet of the air inlet preheating heat exchanger. The liquid outlet of the air inlet preheating heat exchanger isconnected with the liquid inlet of the cold start heater. According to the invention, the problems of cold start of the fuel cell vehicle in a low-temperature environment and preheating before cold air enters a pile are solved.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a thermal management system of a fuel cell vehicle with a cold start function and a control method thereof. Background technique [0002] All countries in the world are actively developing new energy technologies. As a new energy vehicle with reduced oil consumption, high energy conversion rate, zero emission and low noise, fuel cell vehicles are considered to be an important way to solve the energy crisis and environmental degradation. The "Energy Technology Revolution Innovation Action Plan (2016-2030)" compiled by the National Development and Reform Commission and the National Energy Administration has deployed 15 key tasks including hydrogen energy and fuel cell technology innovation. [0003] At present, the use of pure electric vehicles is limited by the energy density of the power battery, and the driving range is limited. In winter, electric heating is used to...

AI Technical Summary

Problems solved by technology

[0004] The working characteristics of the fuel cell stack determine that the air into the stack cannot be lower than 0°C, because the low-temperature air entering the stack for a long time will cause the temperature of the monolithic membrane electrode at the inlet of the stack to blow down, so that the ice will puncture the membrane electrode and cause Membrane leakage

In addition, the temperature difference between the inlet and outlet of the single-piece membrane electrode is large, and long-term use will accelerate the performance decay of the stack and reduce the service life

Starting the fuel cell in an environment below 0°C, due to the formation of ice and the blockage of the reaction site, the operating performance and life of the fuel cell will be reduced, resulting in irreversible damage to the cell components

[0005] The utility model patent with the publication number CN207398272U and the publication date of May 22, 2018 discloses a thermal management system and a control pipeline of a hydrogen fuel cell, which controls the on-off of the three-way solenoid valve and the opening and closing of the water pump. The on-off and direction of the waterway in the road, and select the radiator and heating device to start and stop according to the temperature to realize heating, heat dissipation and heat preservation of the system. The preheating in front of the stack did not use the waste heat generated by the fuel cell to heat the passenger compartment and lithium battery, resulting in energy waste

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