Fuel cell stack

Abstract

The invention relates to the technical field of a fuel cell and specifically relates to a fuel cell stack. The fuel cell stack comprises bipolar plates, membrane electrodes, a current collecting plate and an end plate, wherein one bipolar plate and one membrane electrode are formed into a monocell; a plurality of monocells are overlapped and then are combined with the current collecting plate and the end plate so as to form the fuel cell stack; each bipolar plate comprises an upper hydrogen flow guide layer and a lower air flow guide layer; a radiating channel is arranged between the hydrogen flow guide layer and the air flow guide layer; a vertical support main rod is arranged on the radiating channel; branches are respectively connected with the two sides of the support main rod; the two ends of the branches are respectively connected with the upper end of one support main rod and the lower end of the other support main rod; and spaces between the support main rods and the branches are arranged as cooling channels. The fuel cell stack provided by the invention has excellent heat radiation, high stability and capability of relieving the weight of the fuel cell stack.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell stack. Background technique [0002] The fuel cell stack includes a bipolar plate, a membrane electrode, a collector plate and an end plate. The bipolar plate and the membrane electrode form a single cell, and multiple single cells are stacked together with the current collector plate and the end plate to form a fuel cell stack. The two most critical components in the battery are the bipolar plate and the membrane electrode. The bipolar plate accounts for 60%-80% of the total weight of the fuel cell, and accounts for 30-45% of its cost, so the bipolar plate is greatly reduced. The processing cost is the premise that fuel cells can be applied to commercial production. [0003] The normal operating temperature of the fuel cell stack is 30-70°C. If the temperature is too low, the water generated by the reaction will condense, block the gas cooling channel, and the p...

AI Technical Summary

Problems solved by technology

[0004] Patent CN202308177U relates to an open air-cooled proton exchange membrane fuel cell stack. In this patent, the bipolar plate is composed of two bipolar half plates, that is, the anode plate and the cathode plate. A cooling air channel is provided to speed up the heat dissipation of the stack. Although the purpose of heat dissipation can be achieved, the weight of the fuel cell stack is relatively large, and the cooling and heat dissipation channels are directly set on the cathode and anode plates. The size of the cooling fan is used to adjust the heat dissipation area. Often due to the limited heat dissipation area and poor heat dissipation effect, the heat generated by the fuel cell cannot be completely dissipated, thereby affecting the performance of the fuel cell, or increasing the air volume of the cooling fan to achieve the purpose of heat dissipation. Added additional power consumption

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