Thermal management system and control method for hydrogen fuel cell vehicle

Abstract

The invention relates to a thermal management system and control method for a hydrogen fuel cell vehicle. The method includes an expansion kettle, a water pump, an electronic thermostat, a fuel cell radiator, a solenoid valve, a fuel cell stack and an ion exchanger. In order to overcome the restriction that an existing fuel cell stack can not be started under the condition of too low ambient temperature, an auxiliary water heating scheme is designed in a small circulation branch to achieve the fast start-up of the fuel cell stack at low temperature and improve the adaptability of the fuel cellstack to the low temperature environment. The waste heat recovery and utilization of the fuel cell stack can be achieved by adding an auxiliary air-conditioning water heating and heat exchange systemin a water system. The electricity demand of an air heater is reduced, the electric energy of the whole vehicle is saved, and the endurance range of vehicles in winter is increased. Through the design improvement of a degassing device for the fuel cell stack, the degassing problem of the fuel cell stack water system in the process of filling and operation is solved, and the reliability of the fuel cell heat management system is improved.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, refers to the field of hydrogen energy vehicles, in particular to a thermal management system and a control method for a hydrogen fuel cell vehicle. Background technique [0002] Hydrogen fuel cell is a device that uses hydrogen as fuel and oxygen as oxidant, and converts chemical energy into electrical energy through electrochemical reaction. In the process of reaction, water and heat are generated. It is a clean and environmentally friendly new energy source. A fuel cell vehicle is a new energy vehicle with the advantages of energy saving, zero emission, no pollution, high efficiency, low noise, etc. It has developed rapidly in recent years and has good application prospects. [0003] The normal working temperature of the fuel cell is 60℃-80℃. If the temperature is too low, the working efficiency will decrease. If the temperature is too high, the membrane electrode will lose water ...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a hydrogen fuel cell vehicle thermal management system and control method to solve the problems in the prior art that do not have fuel cell waste heat utilization and degassing, and can not affect the low-temperature start-up effect while increasing waste heat utilization

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