Large area melting carbonate fuel cell

Abstract

A large-area molten carbonate fuel cell comprises a heating end plate and a bipolar plate, wherein the heating end plate is a stainless steel half dipolar plate, one face of which preheats gas entering a cell stack while the other face performs electrochemical reaction, the heating end plate includes an anode end plate and a cathode end plate which are used for leading out as collectors of the whole cell stack and for measuring current and voltage values of the cell stack, the bipolar plate is a large-area stainless steel plate, a certain amount of air holes is distributed on the periphery ofthe large-area stainless steel plate, two sides of the bipolar plate are fabricated into gas channels in certain shape, electrodes are positioned on the gas channels, and the power is generated whilethe gas flows through the surface of the electrodes. The bipolar plate of the large-area molten carbonate fuel cell can be fabricated by numerical control machining or etching methods, and the bipolar plate and the heating end plate are shaped in one step, thereby greatly shortening the machining time, reducing the thickness of the bipolar plate through the controlling of machining technique, greatly reducing the weight of the bipolar plate, and guaranteeing to meet the sealing requirements during cell stack operation.

Description

technical field [0001] The invention belongs to the key technology of fuel cells in the field of energy technology, and in particular relates to a large-area molten carbonate fuel cell. technical background [0002] A fuel cell is a device that directly converts the chemical energy of hydrogen and oxygen into electrical energy through an electrode reaction. Its biggest feature is that the reaction process does not involve combustion, so the energy conversion efficiency is not limited by the "Carnot cycle", and the efficiency is as high as 50 % to 60%, the battery reaction product is only water, and there is no discharge of pollutants. Therefore, fuel cells represent a completely new energy conversion method that is completely different from traditional energy systems. It will not only replace the motor devices widely used in transportation and power plant systems in a cleaner and more sustainable way, but also gradually enter into portable power supply. systems and other e...

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Problems solved by technology

This processing method is cumbersome, and the material of the large holes removed in the process of making the mask cannot be fully utilized, resulting in waste of materials. The thickness of the bipolar plate processed according to the patented process will also reach 5-7mm. In addition, the patented center plate The four machined rectangular holes are actually detrimental to the sealing of the battery pack

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