Sulzer Hexis Ag

Hexis Ag

Martin Keller

Bruno Doggwiler

Andreas Ruegge

Andreas Rüegge

The method for operating a fuel cell battery (1) comprises an analysis of an integrity state of the battery. This integrity state is determined by means of measurement of operating parameters and a programmed evaluation of the measurement data. The battery is controlled for the purpose of reliable operation in such a manner that the maximum electrical output power is subjected to a limitation which is dependent on the integrity state or an interruption of the operation is initiated. The integrity state can be characterized by at least two parameters, in particular a parameter pair C, d. From a relationship which contains the parameters an internal electrical resistance (R) of the battery can be calculated on the one hand and a statement on the quality of the battery can be derived on the other hand.

Method for operating a fuel cell battery

A fuel cell battery is operated with an afterburning at the periphery of a cell stack. Each cell of the battery has at least one entry point for air or another gas containing oxygen. The afterburning is provided inside a ring-shaped space about the cell stack. The named entry points are communicatingly connected as a totality or in each case group-wise via at least one air space, which extends axially along the cell stack and which stands in direct contact with the latter. Each air space is separated from an afterburner chamber, which likewise forms a space which communicates axially along the cell stack, by at least one wall.

Growing community of inventors

Winterthur, Switzerland

Martin Keller