Fuel cell system

Abstract

In a fuel cell system which dilutes a liquid fuel to supply the diluted liquid fuel to an anode, it is intended to achieve stable electricity generation capacity. The fuel cell system generates electricity by an electrochemical reaction between the liquid fuel and an oxidant, and this system comprises a cell which generates electricity by the electrochemical reaction; a fuel container containing the liquid fuel of high concentration; and a buffer tank which dilutes the liquid fuel in the fuel container to supply the diluted liquid fuel to the anode of the cell, wherein an electromagnetic valve is provided in a fuel supply path between the fuel container and the buffer tank to prevent the liquid fuel from flowing back from the buffer tank to the fuel container.

Description

technical field [0001] The present invention relates to a fuel cell system that supplies liquid fuel to fuel cell cells to generate electricity. Background technique [0002] In recent years, from the viewpoint of environmental problems and energy saving, the development of fuel cells that generate electricity by utilizing the electrochemical reaction of fuel and oxidant has been actively carried out. The fuel cell is a device that generates electric energy from fuel and an oxidant, and can obtain high power generation efficiency. In addition, the main features of the fuel cell include the following features, that is, since it does not directly generate electricity through the process of thermal energy or kinetic energy like conventional power generation methods, high power generation can be expected even if it is small-scale. Efficiency, and since there is little discharge of nitrogen compounds, etc., there is little noise or vibration, so the environment is good. [0003...

AI Technical Summary

Problems solved by technology

In this way, when the methanol aqueous solution flows back into the fuel supply path, even if the pump is operated next time, the diluted methanol aqueous solution will return to the buffer tank, resulting in a sharp drop in concentration and a decrease in power generation capacity.

[0008] In addition, this kind of problem also occurs when air bubbles are mixed into the fuel supply path.

However, when handling is facilitated by making the fuel container a detachable bunker, no matter what you do, air bubbles will enter the fuel supply path when the fuel container is replaced, etc.

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