Fuel cell having a relay provided between cells of different...

H - Electricity – 01 – M

Patent

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H01M 8/04 (2006.01)

Patent

CA 2626703

In a fuel cell which includes a plurality of stacks (3) in which a plurality of cells (2), which cause reaction gases to undergo electrochemical reaction and generate electricity, are stacked in layers; and an electrically conductive member (9) which electrically connects together end portions of the stacks (3), so that the stacks (3) constitute a series circuit, there is also provided a first relay (4) which electrically connects together some cell (2) other than one at an end portion of a stack (3), and a cell (2) of another stack (3). This first relay (4) can create a bypass for cutting out a cell (2) whose cell voltage value has become less than or equal to a predetermined value from the series circuit of the fuel cell.

L'invention concerne une pile à combustible comprenant : plusieurs empilements (3) qui comportent plusieurs cellules (2) empilées en couches, lesquelles soumettent des gaz réactionnels à une réaction électrochimique de façon à générer de l'électricité, et ; un élément électroconducteur (9) qui relie électriquement des parties terminales des empilements (3), de sorte que ces empilements (3) forment un circuit série. La pile à combustible selon l'invention comprend en outre un premier relais (4) qui relie électriquement une cellule (2) non disposée au niveau d'une partie terminale d'un empilement (3), avec une cellule (2) faisant partie d'un autre empilement (3). Ce premier relais (4) peut servir à former une dérivation qui permet de déconnecter du circuit série de la pile à combustible, une cellule (2) dont la tension est passée à une valeur inférieure ou égale à une valeur prédéterminée.

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