ELECTROCHEMICAL SYSTEM WITH FLUID BYPASSING LIMITATION ELEMENTS

摘要

An electrochemical system (1) consists of a layering of several cells separated from one another by bipolar plates (3). At least one cell comprises an electrochemically active region (6) 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 microdistribution of media. Limitation elements (10) are provided in the border region between the channel structure and the boundary wall, for avoiding fluid from bypassing between the channel structure and the boundary wall. The gas diffusion layer covers the channel structure and/or at least parts of the limitation elements. The reliability and the efficiency of electrochemical system are increased by preventing the bypass in the border region of the electrochemically active field.