An air-cooled module for heat transfer temperature uniformization of a fuel cell

Abstract

The invention discloses an air-cooled module for heat transfer temperature uniformization of a fuel cell. The air-cooled module mainly consists of a fuel cell module, fins and a fan system; the fuel cell module comprises an end cap, a membrane electrode, an ultra-thin temperature uniformization plate, a plurality of membrane electrodes and a plurality of ultra-thin uniform temperature plates are alternately arranged, the two sides of each membrane electrode are respectively provided with an ultra-thin uniform temperature plate, and the ultra-thin uniform temperature plate comprises a shell, acavity, a liquid suction core and a working medium; The hollow cavity is arranged in the housing, the hollow cavity is at least protruded from one end of the housing, and the hollow cavity is providedwith a liquid suction core and a working medium; The upper surface or the lower surface of the shell is respectively provided with an air flow channel or a hydrogen flow channel; The overall thickness of the ultra-thin homogeneous temperature plate shall not exceed 3mm; A plurality of fins are installed on the condensing end of the ultra-thin uniform temperature plate. The evaporation end of theultra-thin uniform temperature plate of the invention can separate the reaction gas, collect and conduct the electric current; The heat flux concentrated on the surface of the bipolar plate is rapidlytransferred and diffused to the large area of the condensation surface, which has the effect of uniform temperature and heat dissipation.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an air-cooled module for heat transfer and temperature uniformity of fuel cells. Background technique [0002] Fuel cell is known as the fourth continuous power generation method that can continuously generate electricity after hydropower, thermal power and nuclear power. It has many technical advantages that are incomparable to traditional thermal power generation. The chemical energy of the fuel is converted into electrical energy, and then the vehicle is driven by the motor. When the generator is driven by an internal combustion engine, its efficiency is only 30% to 40%; while the efficiency of the fuel cell can reach 50% to 60%, its outstanding advantages are Reduce pollution emissions. For hydrogen fuel cells, the only product after power generation is water, which can achieve zero pollution. Therefore, the advantages of fuel cell power devices in both environmental prot...

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Problems solved by technology

However, in the above-mentioned existing patent technology, a copper working plate is inserted and installed in each battery unit, and ordinary circular heat pipes are installed in the working plate to achieve heat dissipation, which will greatly increase the overall size of the stack.

[0007] 2. The heat pipe in the above-mentioned existing patented technology adopts an ordinary round pipe. The contact area between the ordinary round heat pipe and the working plate is small, the heat exchange efficiency is not high, and a large amount of heat cannot be discharged from the inside of the fuel cell in time, which seriously affects the electric stack. normal work

[0008] 3. The heat pipes in the above-mentioned existing patent technology are independently dissipating heat, and each heat pipe cannot be kept at the same temperature, and there is a certain distance between the heat pipes, which will cause uneven temperature distribution on the bipolar plate surface and a temperature gradient Larger, affecting the working condition of the electric stack, and in severe cases, it will damage the service life of the electric stack

[0009] 4. In the above-mentioned existing patented technology, the evaporating end of the heat pipe and the condensing end form an angle of 90° to 120°, which will increase the flow resistance of the internal phase working medium of the heat pipe and seriously affect the heat exchange efficiency of the heat pipe, so the feasibility is not high

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