A fuel cell thermal management system control device, method and system

Abstract

The invention provides a control device for a fuel cell thermal management system, including a fuel cell stack, a stack discharge temperature sensor, a water pump, a three-way valve, a vehicle radiator, an external circulation temperature sensor, a heater, a stack discharge temperature sensor and a controller ; The fuel cell stack is connected with the stack temperature sensor and the stack temperature sensor respectively; the stack temperature sensor is connected with the water pump; the water pump is connected with the three-way valve; The heater is connected; the vehicle radiator is connected with the external circulation temperature sensor; the external circulation temperature sensor is connected with the heater; the heater is connected with the stack temperature sensor; the controller receives and sends all signals, and executes the control software embedded in the control software The control logic controls all executable devices. The invention has fast response speed, high control precision and high stability, greatly improves the working efficiency of the fuel cell and prolongs the working life of the fuel cell.

Description

technical field [0001] The present invention relates to the technical field of fuel cells, and in particular, to a control device, method and system for a fuel cell thermal management system. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy of the fuel into electrical energy through the electrochemical reaction of a fuel (such as hydrogen) and an oxidant. 100% of the energy that cannot be converted into electrical energy will be dissipated in the form of heat. Therefore, during the operation of the fuel cell stack, it is a heat generating body, so the thermal management subsystem is an important component of the fuel cell system. However, due to the complex and changeable operating conditions of the fuel cell vehicle, the power of the fuel cell system also fluctuates violently. In this case, it is very difficult to maintain a stable temperature of the fuel cell stack. [0003] The life of the fuel cell stack i...

AI Technical Summary

Problems solved by technology

[0002] A fuel cell is a power generation device that directly converts the chemical energy of the fuel into electrical energy by electrochemically reacting fuel (such as hydrogen) with an oxidant. The power generation efficiency is high, and the pollution is very small compared with the traditional internal combustion engine. 100%, part of the energy that cannot be converted into electrical energy will be dissipated in the form of heat. Therefore, during the operation of the fuel cell stack, it is a heat generating body, so the thermal management subsystem is an important component of the fuel cell system Due to the complex and changeable operating conditions of fuel cell vehicles, the power of the fuel cell system also fluctuates violently. In this case, it is very difficult to maintain a stable temperature of the fuel cell stack

[0003] The life of the fuel cell stack is crucial to its commercialization, and the temperature of the fuel cell that does not meet the operating requirements will directly reduce the durability and life of the fuel cell. Too high a fuel cell temperature will lead to a decrease in the life of the stack material. It directly affects the life of the fuel cell stack. If the temperature is too low, the output efficiency of the fuel cell will decrease, and if the temperature fluctuates too much, it will directly lead to a decrease in the life of the fuel cell stack. Therefore, the temperature of the fuel cell should be controlled within the requirements of the stack. The operating temperature should also minimize temperature fluctuations during operation

[0004] The existing technology usually only simply controls the temperature of the stack to reach the operating temperature, but due to the lag of the temperature reading speed of the temperature sensor, and the hysteresis of the influence of the heat dissipation of the water pump and cooling fan on the temperature in the stack, when dealing with complex and changeable operating conditions ,like figure 1 , there are usually problems such as large temperature fluctuations and inability to stabilize at the required operating temperature

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