A thermal management method for a proton exchange membrane fuel cell
A proton exchange membrane and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of increasing process cost, success rate, and efficiency, and achieve the effects of reducing thickness, increasing specific power, and improving cooling efficiency
Active Publication Date: 2021-05-28
中能源工程集团氢能科技有限公司 +1
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Problems solved by technology
Because of the existence of the liquid flow field, on the one hand, it is necessary to increase the thickness of the bipolar plate so that there is a thickness space for the processing of the liquid cooling flow field; on the other hand, there is a key and complicated The process is how to reliably bond and seal the hydrogen flow field plate and the air flow field plate, which greatly increases the process cost, success rate and efficiency.
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[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0023] A heat management method for a proton exchange membrane fuel cell, comprising the steps of:
[0024] 1) Process a bipolar plate, the bipolar plate is processed by only one plate, not two unipolar plates spliced together. For a graphite light plate or metal sheet, the light plate is made into a bipolar plate with flow fields and inlet and outlet channels on both sides by engraving or stamping. The bipolar plate has only two import and export channels. Such as figure 1 with 2 as shown, figure 1 with figure 2 Shown are the front and back sides of a typical bipolar plate, which are hydrogen / coolant flow field channels and air flow field channels, respectively.
[0025] 2) The bipolar plate is matched with the membrane electrode and the corresponding seal, and assembled into a fuel cell stack in the way that the bipolar plate and the membrane elect...
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The invention discloses a thermal management method of a proton exchange membrane fuel cell, which comprises the following steps: 1) processing a hydrogen / coolant flow field channel and an air flow field channel on both sides of a graphite light plate or a metal sheet to form a bipolar 2) assemble the bipolar plates and membrane electrodes made in step 1) into a fuel cell stack in a cross-overlapping manner; 3) connect the fuel cell stack assembled in step 2) to the fuel cell system; 4) Hydrogen and coolant flow into the hydrogen / coolant inlet of the stack through the decompression device of the hydrogen subsystem and the water pump of the cooling subsystem respectively, and flow into the anode flow field of the stack; the excess hydrogen 1. The cooling liquid for heat dissipation and the water produced by the reaction flow out of the stack through the hydrogen / coolant outlet of the stack; 5) The air is transported to the air inlet of the fuel cell stack through the air compressor, and flows into the cathode flow field of the fuel cell , the remaining air and water produced by the reaction flow out through the air outlet of the stack.
Description
technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a thermal management method of a proton exchange membrane fuel cell. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy of fuel into electrical energy, among which the proton exchange membrane fuel cell (PEMFC) is the most widely used. It has the characteristics of high efficiency, cleanliness, and environmental friendliness, and can be used in various fields such as electric vehicles, distributed power stations, aviation, military industry, and civil use, and has very broad application prospects. PEMFC will generate heat energy equivalent to electric energy during the power generation process. If the heat energy generated cannot be removed in time and effectively, the temperature of the stack will increase. Although high temperature can improve the electrode reaction and catalytic activity, excessive t...
Claims
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IPC IPC(8): H01M8/0258H01M8/0263H01M8/0267H01M8/0273
CPCH01M8/0258H01M8/0263H01M8/0267H01M8/0273Y02E60/50
Inventor 刘畅王诚穆怀萍张向东王建龙
Owner 中能源工程集团氢能科技有限公司