Direct alcohol type fuel cell system

Abstract

The invention provides a direct alcohol type fuel cell system, comprising a fuel tank, a cathode oxidizing agent feed subsystem, an anode fuel cycle subsystem and a galvanic pile, wherein the fuel tank is a close fuel tank, a high-concentration fuel is arranged in the fuel tank, and the fuel tank is communicated with the cathode oxidizing agent feed subsystem by a pipeline. The cathode oxidizing agent feed subsystem comprises a gas pump, the pipeline, and the like. When the air pump is in working, a cathode gas circuit has higher pressure. If the fuel tank is communicated with the cathode gascircuit, the cathode gas circuit can inflate the fuel tank to cause the gas in the tank to have higher pressure. The relatively high pressure and the pressure in an anode fuel mixing subsystem form pressure difference, the high-concentration fuel in the tank is controlled to be supplied to the anode fuel mixing subsystem by a valve under the action of the pressure difference, and the high-concentration fuel forms a low-concentration fuel after mixing and then enters the galvanic pile.

Description

technical field [0001] The invention relates to a fuel cell system, in particular to a direct alcohol fuel cell system in the fuel cell system. Background technique [0002] A fuel cell is a device that generates electricity through electrochemical reactions. According to different fuel cell principles, fuel cells can be divided into many types, such as proton exchange membrane fuel cells, solid oxide fuel cells, molten carbonate fuel cells, alkaline fuel cells, etc. The invention relates to a direct alcohol fuel cell using liquid organic hydrocarbons such as methanol and ethanol as fuel in a proton exchange membrane fuel cell. The methanol, ethanol and other liquid organic hydrocarbon fuels of the present invention have the advantages of wide sources, high energy density, safe use, easy storage, convenient transportation and the like. Therefore, direct alcohol fuel cells are particularly suitable for use as a power source for portable devices such as notebooks and mobile ...

AI Technical Summary

Problems solved by technology

[0004] (1) The fuel pump uses its own power generated by the fuel cell as its power source, which has a certain power consumption and will reduce the net output power of the system;

[0005] (2) The noise generated during the operation of the fuel pump may limit the use of fuel cell systems on certain equipment;

[0006] (3) The existence of the fuel pump and its control link increases the probability of failure of the fuel cell system;

[0007] (4) In some systems that require high volume-specific energy, it is necessary to use a micro-fuel pump with a small enough volume, and the production of a micro-fuel pump belongs to the high-tech field (there is no domestic product at present), and the cost is relatively high, resulting in fuel The increase in the total cost of the battery system is not conducive to the promotion and application of fuel cells

The structure of the direct alcohol fuel cell system of the above two fuel supply methods is relatively complex, and the requirements for design and preparation are relatively high. For the fuel cell used as a power source for portable equipment, it cannot meet the needs of reducing costs and simplifying the process.

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