Heating devices in proton exchange membrane fuel cell stacks

Abstract

The invention discloses a heating device in a proton exchange membrane fuel cell stack. The device includes a heating body, An air collecting and distributing cavity, a collecting cavity, a hydrogen collection and distribution chamber, a plurality of air passages and a plurality of hydrogen passages are arranged in the heating body. An inlet end and an outlet end of the air flow passage are respectively communicated with an air collecting and distributing cavity and a collecting cavity, The inlet end of the hydrogen gas flow passage is communicated with the hydrogen gas collecting and distributing cavity, and a combustion port communicated with the corresponding hydrogen gas flow passage is arranged on the flow passage wall of each air flow passage, the hydrogen gas in each hydrogen gas flow passage can enter into the corresponding air flow passage through the combustion port, and an igniter is arranged at the combustion port of each air flow passage; The air collecting and distributing cavity is communicated with the heating air channel; The hydrogen gas collecting and distributing cavity is communicated with the heating hydrogen gas channel; The collecting chamber is communicatedwith the exhaust passage and the drain passage. The invention has the advantages that the heating effect is good, and the proton exchange membrane fuel cell can be reliably started under the ultra-low temperature condition.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, in particular to a stack of proton exchange membrane fuel cells. Background technique [0002] The structure of the proton exchange membrane fuel cell mainly includes: several single cells arranged between a pair of end plates. Proton exchange membrane fuel cell is an electrochemical power generation device that uses hydrogen and oxygen as raw materials to electrochemically react to generate water and convert chemical energy into electrical energy at the same time. It has the characteristics of cleanness, high efficiency, energy saving and environmental protection, and high energy conversion rate. Because the water produced by the chemical reaction will remain inside the proton exchange membrane fuel cell stack, in the low-temperature environment below the freezing point, the liquid water inside the fuel cell will freeze, and the reaction heat generated when the fuel c...

AI Technical Summary

Problems solved by technology

Because the water produced by the chemical reaction will remain inside the proton exchange membrane fuel cell stack, in the low-temperature environment below the freezing point, the liquid water inside the fuel cell will freeze, and the reaction heat generated when the fuel cell is started is not enough to dissolve the ice. As far as the start-up of the fuel cell is affected, the proton exchange membrane fuel cell may have problems such as slow start-up, difficult start-up or start-up failure in harsh low-temperature environments

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