Fuel cell closing system
AssigneeRobert Bosch GmbH
InventorAndreas Knoop
Life of this patent
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Abstract
The invention relates to a fuel cell closing valve (36) having a valve closing body (5), which is electromagnetically movable from a first position to a second position by the energizing of an electrical coil (10) in order to close or open at least one medium passage of a fuel cell. In order to optimize the operation of the fuel cell system, the fuel cell closing valve (36) comprises two permanent magnets (13, 14), by means of which the valve closing body (5) can be held both in the first position and in the second position when the electrical coil (10) is in a currentless state.
Claims8
A fuel cell closing valve (36;
- 37;
- 38) having a valve closing body (5) which, by electrical energization of an electrical coil (10), can be moved electromagnetically from a first position into a second position in order to close or open at least one medium passage of a fuel cell (30), wherein the fuel cell closing valve (36;
- 37;
- 38) comprises two permanent magnets (13, 14) configured to, in an electrically deenergized state of the electrical coil (10), hold the valve closing body (5) in the first position or in the second position, and wherein the valve closing body (5) is combined with a guide rod (7) to which the permanent magnets (13,14) are attached.
A fuel cell system having at least two fuel cell closing valves (36, 37), each of the at least two fuel cell closing valves having a valve closing body (5) which, by electrical energization of an electrical coil (10), can be moved electromagnetically from a first position into a second position in order to close or open at least one medium passage of a fuel cell (30), wherein the at least two fuel cell closing valves (36, 37) each comprise two permanent magnets (13, 14) configured to, in an electrically deenergized state of the electrical coil (10), hold the respective valve closing body (5) in the first position or in the second position, and wherein the fuel cell system (26) comprises two cathode paths (41-46, 51-57;
- 61-66, 71-77) each having therein a respective one of the at least two fuel cell closing valves (36, 37), each configured as a 3/2 directional cathode valve.
Dependencies are inferred from the claim text.