Fuel cell low-temperature quick-starting system and method adopting staged temperature control

Abstract

The invention discloses a fuel cell low-temperature quick-starting system and method adopting staged temperature control. The system comprises an electric pile of a PEMFC (Proton Exchange Membrane Fuel Cell) and a coolant storage tank, wherein an air heater is mounted on an air inlet pipeline of the electric pile; a coolant heater is mounted on a water inlet pipeline between the electric pile and the coolant storage tank; an electric pile heater is further arranged on the electric pile and used for pre-heating an end plate, an insulating plate and a current collector of the PEMFC; a temperature sensor used for measuring the temperature of the electric pile is further arranged in the system. According to the invention, the temperature of a fuel cell pile can be detected, and different parts of the fuel cell pile can be pre-heated for temperature rising according to the different working medium heat capacities and the different temperature requirements for starting of different parts of a fuel cell system, so that the fuel cell can be pre-heated quickly, the phenomenon that the fuel cell pile is damaged due to the excessively high temperature gradient is avoided, and the fuel cell system can be quickly started in the environment below zero.

Description

technical field [0001] The invention relates to the field of proton exchange membrane fuel cells, in particular to a fuel cell low-temperature quick start system and method with hierarchical temperature control. Background technique [0002] A fuel cell is an energy conversion device that converts chemical energy stored in fuel and oxidant directly into electrical energy without combustion. The proton exchange membrane fuel cell (PEMFC) reactants are hydrogen and oxygen, and the reaction product is only water. It has high energy conversion efficiency, environmental friendliness, no noise, high reliability, fast start-up at room temperature, and various fuel (hydrogen) preparation methods. And other advantages, it has become the preferred vehicle power source to solve the problems of environmental pollution and energy depletion. [0003] Proton exchange membrane fuel cells (PEMFC) are very suitable for portable power sources and transportation tools, and are actively support...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a hierarchical system that can quickly and safely start the stack of the proton exchange membrane fuel cell for the defects of the prior art that the fuel cell stack is heated unevenly or the fuel cell stack is slow to start. Temperature-controlled fuel cell low-temperature quick-start system

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