Fuel cell stack operation temperature control method, device and system

Abstract

The invention provides a fuel cell stack operation temperature control method, device and system. The method comprises the steps of receiving a first temperature regulation and control instruction of a user in a stack temperature change regulation and control process, according to the first temperature regulation and control instruction, executing a temperature regulation step corresponding to the theoretical temperature value feedback mode, acquiring a second actually measured temperature value of the stack cooling liquid inlet, calculating a theoretical temperature value of a stack cooling liquid outlet according to the second actually measured temperature value of the stack cooling liquid inlet, adjusting the operating temperature of the fuel cell stack based on the theoretical temperature value, circularly executing the temperature adjusting step until the operating temperature of the fuel cell stack is stabilized at the target temperature value, and receiving a second temperature regulation and control instruction of the user, and adjusting the operating temperature of the fuel cell stack based on an operating temperature feedback mode in the second temperature regulation and control instruction. The regulation efficiency of the operating temperature of the fuel cell stack can be improved, the accuracy of temperature control is improved, and fluctuation is eliminated.

Description

technical field [0001] The present application relates to the technical field of fuel cells, and in particular, to a method, device and system for controlling the operating temperature of a fuel cell stack. Background technique [0002] A fuel cell is an electrochemical power generation device that directly converts chemical energy into electrical energy, which is not limited by the Carnot cycle, has high energy conversion efficiency, and is pollution-free and noise-free. It is becoming an ideal energy utilization method for a new generation. The battery technology is gradually maturing, and the commercial application of fuel cells has broad prospects for development. [0003] The fuel cell stack is formed by stacking several single cells, and the working voltage of each single cell is generally between 0.6V-0.95V. In addition to the parameters of the fuel cell stack itself, the factors affecting the performance of the fuel cell mainly include the fuel and oxide inlet press...

AI Technical Summary

Problems solved by technology

[0005] Using the stack coolant outlet temperature value as a feedback value will cause a lag in temperature regulation when the stack heats up or cools down

The actual controlled temperature is the temperature of the water in the water tank. When adjusting the temperature, because the coolant at the outlet of the stack will be reheated by the stack, the temperature change will be delayed. The temperature adjustment and the feedback temperature are not synchronized, causing the stack Continuous fluctuation of temperature; using the inlet temperature value of the stack coolant as the feedback value, the temperature setting value can only be the inlet temperature of the stack, and cannot directly monitor and control the operating temperature of the stack

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