Block type end plate structure for measuring current distribution of PEMFC

Abstract

The invention relates to a block type end plate structure of a PEMFC (Proton Exchange Membrane Fuel Cell). The structure comprises an insulating motherboard and n sub collector blocks (n is a positive integer equal to or larger than 2); grooves are formed on the insulating motherboard, the sub collector blocks are embedded in the grooves on the insulating motherboard, and after the surface on oneside of the insulating motherboard, on which the sub collector blocks are embedded, is integrally flatten-milled, a normal reaction gas flow field is curved; conductive metal collector bars vertically penetrating through the insulating motherboard are arranged on the sub collector blocks; one end of each collector bar penetrating through the insulating motherboard is connected with a current output conducting wire of the PEMFC; and a current mutual induction element is arranged on the conducting wire. Compared with the prior art, the invention has the distinguished advantage that the cell temperature can be flexibly controlled through circulating water, and the flow field is curved after tensioning and flatten-milling are performed, so that a similarity to a normal flow field plate is guaranteed. Anyhow, the design of the end plate realizes the blocking structure while a flow field plate, a cooling plate and a collector plate are integrated, and is a novel block type end plate structure for measuring current distribution.

Description

technical field [0001] The invention relates to a fuel cell electrode structure, in particular to a segmented end plate structure for on-line monitoring of the current distribution of a proton exchange membrane fuel cell. Background technique [0002] Fuel cell is one of the new high-efficiency, energy-saving and environment-friendly power generation methods in the 21st century. It can directly convert the chemical energy in fuel cells and oxidants into electrical energy, and is not limited by the Carnot cycle. It has high energy conversion efficiency and is environmentally friendly. pollute. Among various fuel cells, the proton exchange membrane fuel cell (PEMFC) has broad application prospects, it has the advantages of low temperature start-up, no electrolyte corrosion and leakage, simple structure, convenient operation, etc. Among them, the high-power proton exchange membrane fuel cell has been It is recognized as the preferred energy source for electric vehicles, region...

AI Technical Summary

Problems solved by technology

However, in actual operation, it often occurs that a certain area receives a small fastening force, while a certain area receives a large fastening force, which leads to too large a contact resistance between the fuel cell electrode and the collector plate, or causes the plate to deform and MEA Fragmentation

[0007] (3) The randomness of fuel cell assembly is high, the repeatability is poor, and the similarity with the real battery flow field is poor

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