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US 2006/0051640 A1Published application
PEM fuel cell system
AssigneeSiemens Aktiengesellschaft
InventorsRolf Bruck, Joachim Grosse, Jorg-Roman Konieczny, Meike Reizig
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Abstract
A PEM fuel cell with a heating element, a method for operating the PEM fuel cell system, and a PEM fuel cell system includes the heating element having an integrated thermosensor that, substantially, can prevent the temperature of the cell/system from dropping below the freezing point of the electrolyte.
Claims14
A PEM fuel cell system, comprising:
- at least one PEM fuel cell having a membrane electrode unit;
- and
- at least one heating element with an integrated thermal sensor, at least said thermal sensor being disposed in said membrane electrode unit of said at least one PEM fuel cell.
A PEM fuel cell system having a rest phase, comprising:
- at least one fuel cell module formed as a stack of individual PEM fuel cells having an electrolyte, said module having a membrane electrode unit;
- at least one heating element with an integrated thermal sensor, at least said thermal sensor being disposed at least in one of:
- said membrane electrode unit;
- each of said fuel cells;
- and
- said stack;
- and
- said at least one heating element maintaining a temperature at least one of in said fuel cells and in said stack substantially above a freezing point of said electrolyte.
5 more elements
A PEM fuel cell system having a rest phase, comprising:
- at least one fuel cell module formed as a stack of individual PEM fuel cells having an electrolyte, said module having a membrane electrode unit;
- at least one heating element with an integrated thermal sensor, at least said thermal sensor being disposed at least in one of:
- said membrane electrode unit;
- each of said fuel cells;
- and
- said stack;
- and
- said at least one heating element maintaining a temperature at least one of in said fuel cells and in said stack substantially above a freezing point of said electrolyte one of during and after the rest phase.
5 more elements
A PEM fuel cell system having a rest phase, comprising:
- at least one fuel cell module formed as a stack of individual PEM fuel cells having an electrolyte, said module having a membrane electrode unit;
- at least one heating element with an integrated thermal sensor, at least said thermal sensor being disposed at least in one of:
- said membrane electrode unit;
- each of said fuel cells;
- and
- said stack;
- and
- said at least one heating element maintaining a temperature at least one of in said fuel cells and in said stack substantially above a freezing point of said electrolyte one of during and after the rest phase at operating temperatures between 80° C. and 250° C.
5 more elements
Dependencies are inferred from the claim text.