Method of short-circuiting a malfunctioning elementary...

H - Electricity – 01 – M

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H01M 8/24 (2006.01) C25B 15/00 (2006.01) H01M 8/04 (2006.01)

Patent

CA 2438344

It is described a method of electrical by-passing of an elementary electrochemical cell, for instance a fuel cell, inserted in a filter-press structure delimited by electrically conducting bipolar sheets and provided with perimetral sealing gaskets, comprising short-circuiting the cell by insertion of a conductive material within recesses realised by perforation of materials interposed between the bipolar sheets. The gaskets and the bipolar sheets may be provided with sites predisposed to the perforation, for instance notches for a drilling tip, or gasket regions of decreased hardness.

L'invention concerne un procédé de dérivation électrique d'une cellule électrochimique élémentaire, par exemple d'une pile à combustible, insérée dans une structure de filtre-presse délimitée par des feuilles bipolaires électroconductrices et pourvue de joints d'étanchéité périphériques. Ledit procédé consiste à court-circuiter la cellule par insertion d'un matériau conducteur dans des cavités créées par perforation de matériaux interposés entre les feuilles bipolaires. Les joints et les feuilles bipolaires peuvent être pourvues de zones prévues pour la perforation, par exemple d'encoches destinées à une pointe de forage, ou de zones de joint présentant une dureté réduite.

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