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Electrochemical system

An electrochemical and battery technology, applied in the field of electrochemical systems, can solve problems such as insufficient medium distribution and performance fluctuations of bipolar plates, and achieve the effects of eliminating performance fluctuations, preventing bypass flow, and uniform distribution

Active Publication Date: 2010-08-25
REINZ DICHTUNGS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has now been found in series tests that such bipolar plates exhibit large fluctuations in their performance, which appear to be caused by insufficient media distribution

Method used

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Embodiment Construction

[0038] 1 a to 1 c show the basic configuration of an electrochemical system in the form of a fuel cell stack 1 . It comprises several layers of fuel cell devices 12 (see FIG. 1 b ). The layers of the fuel cell arrangement 12 are held together by end plates which exert compressive stress on the layers of the fuel cell arrangement, for example via clamping bolts as shown in FIG. 1c.

[0039] The configuration of the fuel cell device 12 is explained in more detail below.

[0040]FIG. 1 a shows the internal construction of the fuel cell device 12 in an exploded view. Firstly there is a cell (for example a fuel cell) 2 which comprises a polymer membrane which is capable of conducting ions and which has catalytic layers on both sides at least in the electrochemically active region 6 . Furthermore, two bipolar plates 3 between which the fuel cell 2 is arranged are arranged in the fuel cell arrangement 12 . Furthermore, a gas diffusion layer 9 is arranged in the region between the ...

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Abstract

The present invention describes an electrochemical system as well as a bipolar plate for use in an electrochemical system. The electrochemical system (1), consists of a layering of several cells (2), which in each case are separated from one another by bipolar plates (3), wherein the bipolar plates comprise openings for the cooling (4) or for the removal and supply of operating media (5) to the cells, and the layering may be set under mechanical compressive stress, wherein at least one cell comprises an electrochemically active region (6) which is surrounded by a boundary wall (7) of the bipolar plate, and a channel structure (8) of the bipolar plate is provided within the electrochemically active region, for the uniform media distribution, wherein at least one gas diffusion layer (9) is provided for the micro-distribution of media. Limitation elements (10) are provided in the border region between the channel structure as well as the boundary wall, for avoiding fluid from bypassing between the channel structure and the boundary wall, wherein the gas diffusion layer covers the channel structure and / or at least parts of the limitation elements. The reliability and the efficiency of electrochemical systems are decisively increased by way of preventing the bypass in the border region of the electrochemically active field.

Description

technical field [0001] The present invention relates to an electrochemical system, and a bipolar plate for use in such a system. Background technique [0002] The electrochemical system can be, for example, a fuel cell system or an electrochemical compressor system, in particular an electrolyser, with which, by applying an electric potential, in addition to producing hydrogen and oxygen from water, these gases are simultaneously decomposed under pressure compression. In addition to this, electrochemical compressor systems such as electrochemical hydrogen compressors are known, to which gaseous molecular hydrogen is supplied and in which the Gaseous molecular hydrogen is compressed electrochemically. This electrochemical compression is especially suitable for compressing small amounts of hydrogen, where the mechanical compression of hydrogen would be much more laborious. [0003] Electrochemical systems are known in which an electrochemical cell stack is formed from layers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/24
CPCH01M2008/1095H01M8/0206H01M8/0202H01M8/04089C25B9/203Y02E60/50H01M8/0258C25B9/75C25B11/036H01M8/2483H01M8/0267H01M8/0263H01M8/026
Inventor 贝恩德·高格勒克里斯蒂安·施莱尔赖纳·格卢克克劳迪娅·孔茨约阿希姆·舍雷尔
Owner REINZ DICHTUNGS
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