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Method and apparatus for the disconnection of a fuel cell

A fuel cell and battery technology, applied in the direction of fuel cells, fuel cell additives, fuel cell grouping, etc., can solve the problems of fuel cell efficiency and service life degradation, battery damage, etc., to achieve high efficiency and fast shutdown, simple cost, and effective The effect of the component

Inactive Publication Date: 2011-02-23
FRONIUS INTERNATIONAL GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes the voltage on these gas-depleted cells to reverse phase, which in turn can cause serious damage to these localized cells
As a result, the efficiency and service life of the fuel cell will be degraded

Method used

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  • Method and apparatus for the disconnection of a fuel cell
  • Method and apparatus for the disconnection of a fuel cell
  • Method and apparatus for the disconnection of a fuel cell

Examples

Experimental program
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Embodiment Construction

[0029] At the outset it is pointed out that identical parts of the exemplary embodiment bear the same reference numerals.

[0030] figure 1 A fuel cell 1 is described which generates an electric current from at least two reaction gases, advantageously hydrogen 2 and oxygen 3 or air.

[0031] Typically, the fuel cell 1 is an electrochemical generator, which generates an electrical current directly from the chemical compounds. This is achieved by reversing the electrolysis of water, during which the reaction gases hydrogen 2 and oxygen 3 are formed by the flow of electric current.

[0032] The fuel cell 1 consists of several cells connected in series, which are called a cell stack 12 . In the cell 11 of the fuel cell 1, the reaction gases hydrogen 2 and oxygen 3 react with each other, thereby generating electric current. The battery 11 is formed of an anode 4 , a cathode 5 , an electrolytic solution 6 and a catalyst 7 .

[0033] In the fuel cell 1, hydrogen gas 2 reacts with...

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PUM

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Abstract

The invention relates to a method for the disconnection of a fuel cell (1) with a plurality of cells (11) connected in series, wherein at least two reaction gases are supplied during operation, and the supply of at least one reaction gas is interrupted after operation, and the reaction gas remaining at least in one of the cells (11) is consumed by the current generated by the reaction gases in the cell (11) being dissipated via at least one consumer (13), and to an apparatus for implementing the method. For the complete and controlled consumption of the reaction gases remaining in the individual cells (11), the invention provides that at least one consumer (13) is connected via at least one switching element (14) per cell (11) to each cell (11), with the result that the consumer (13) forms a dedicated circuit with each cell (11), and that at least one reaction gas of each individual cell (11) is completely consumed by the current generated by the reaction gases in the cell (11) being dissipated via the at least one consumer (13) connected to the cell (11).

Description

technical field [0001] The invention relates to a method for shutting down a fuel cell comprising several cells connected in series, wherein during operation at least two reaction gases are supplied and after operation the supply of at least one reaction gas is interrupted, And, the reactive gas remaining in the at least one cell is consumed by dissipating the current generated by the reactive gas in the cell via at least one consumer. [0002] Likewise, the invention relates to a device for shutting down a fuel cell comprising several cells connected in series and connecting lines for supplying at least two reaction gases, said device comprising at least one consumer for dissipating The current generated by the reactant gases present in each cell after operation. Background technique [0003] It is known from DE 10059393 A1 that, after operating a fuel cell, residues of reaction gases are removed which generate an electric current by chemical reactions. This is achieved b...

Claims

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Application Information

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IPC IPC(8): H01M8/04H01M8/24
CPCH01M8/2465H01M8/04925H01M8/04582H01M8/04955Y02E60/50H01M8/04238H01M8/04303
Inventor 克里斯汀·里费尔斯贝戈尔托马斯·施米特斯贝戈尔西蒙·沃尔夫泽格
Owner FRONIUS INTERNATIONAL GMBH