Fuel cell

Abstract

A fuel cell which comprises at least one battery unit. The battery unit comprises positive and negative electrode fluid guide plates and membrane electrodes. The membrane electrodes are disposed between the positive and negative electrode fluid guide plates, wherein a bolt hole is disposed on the non-periphery area of the positive and negative electrode fluid guide plates correspondingly. A fastening bolt is disposed in the bolt hole. A positive conductive plate is interposed between the positive fluid guide and the membrane electrode of the battery unit and a negative conductive plate is interposed between the negative fluid guide and the membrane electrode of the battery unit. A bolt hole is disposed on the positive and negative conductive plates and membrane electrodes correspondingly.A fastening bolt is disposed in the bolt hole. A fluid guide hole is provided on the positive fluid guide plate and the positive conductive plate respectively to connect the air. A fluid guide hole is provided on the negative fluid guide plate and the negative conductive plate respectively to connect the fuel room. The structure of the fuel cell of the invention is simple, the inner resistance islittle, the output power is large, the disassembly and maintenance is convenient, the miniaturization is easy, multi-type voltage and current can be outputted and the operation is convenient.

Description

technical field [0001] The invention belongs to fuel cells, in particular to proton exchange membrane fuel cells. Background technique [0002] Fuel cells are high-efficiency clean and quiet power generation devices that directly convert the chemical energy of fuels such as hydrogen and oxidants such as oxygen in the air into electrical energy through electrochemical reactions, and have extremely broad application prospects. The fuel cell includes at least one battery unit, the battery unit has positive and negative deflectors and membrane electrodes, the membrane electrodes are located between the positive and negative deflectors, and the membrane electrodes are composed of proton exchange membranes and positive and negative electrodes attached to their two sides , which works like this: [0003] Hydrogen passes through the negative deflector to the negative electrode of the membrane electrode and dissociates into protons and electrons; protons pass through the proton exch...

AI Technical Summary

Problems solved by technology

Since the outer frame is located on the periphery of the battery unit and the end pressure plates are located at both ends of the fuel cell, not only the structure is complicated, it is inconvenient to disassemble and assemble, it is difficult to replace parts, and it is not conducive to battery maintenance, but also the outer frame and the end pressure plate occupy a large space in the fuel cell. Under the same battery size, the catalytically active area of ​​the membrane electrode is relatively small, and the middle area of ​​the fuel cell is not easy to compress, the internal resistance of the fuel cell is large, and the output power is small; because the end pressure plate prevents the oxygen in the air from directly diffusing to the membrane The electrode participates in the positive electrode reaction of the battery and the reaction heat of the fuel cell is directly dissipated into the air, requiring various auxiliary devices such as air pumps, fans, fans, water pumps, and cooling water plates, which makes it difficult to miniaturize the fuel cell; , the output voltage and current of the fuel cell are single, and it is inconvenient to use

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