Fuel cell system
First Claim
Patent Images
1. A fuel-cell system comprising:
- a fuel cell;
a device for supplying operating agents of the fuel cell; and
an electrical energy accumulator connected to the fuel cell via an electrical connection, the energy accumulator having a battery with a battery internal resistance and an intermediate charge store having a charge store internal resistance, the charge store internal resistance having a lower resistance than the battery internal resistance; and
a switch provided in the electrical connection between the energy accumulator and the fuel cell,wherein the intermediate charge store has a capacitor.
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Abstract
A fuel-cell system, in particular for a vehicle, has a device for supplying the operating agents for a fuel cell and an electrical energy accumulator. The energy accumulator is composed of a battery and of an intermediate charge store which has a lower internal resistance than the battery. A switch is provided in the electrical connection between the energy accumulator and the fuel cell.
16 Citations
20 Claims
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1. A fuel-cell system comprising:
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a fuel cell; a device for supplying operating agents of the fuel cell; and an electrical energy accumulator connected to the fuel cell via an electrical connection, the energy accumulator having a battery with a battery internal resistance and an intermediate charge store having a charge store internal resistance, the charge store internal resistance having a lower resistance than the battery internal resistance; and a switch provided in the electrical connection between the energy accumulator and the fuel cell, wherein the intermediate charge store has a capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 20)
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7. A fuel-cell system comprising:
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a fuel cell; a device for supplying operating agents of the fuel cell; and an electrical energy accumulator connected to the fuel cell via an electrical connection, the energy accumulator having a battery with a battery internal resistance and an intermediate charge store having a charge store internal resistance, the charge store internal resistance having a lower resistance than the battery internal resistance; and a switch provided in the electrical connection between the energy accumulator and the fuel cell, wherein the intermediate charge store has a supercap capacitor.
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8. A fuel-cell system comprising:
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a fuel cell; a device for supplying operating agents of the fuel cell; and an electrical energy accumulator connected to the fuel cell via an electrical connection, the energy accumulator having a battery with a battery internal resistance and an intermediate charge store having a charge store internal resistance, the charge store internal resistance having a lower resistance than the battery internal resistance; and a switch provided in the electrical connection between the energy accumulator and the fuel cell, wherein the intermediate charge store has a coil.
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9. A method for operating a fuel-cell system having a fuel cell, a device for supplying operating agents of the fuel cell, an electrical energy accumulator connected to the fuel cell via an electrical connection, the energy accumulator having a battery with a battery internal resistance and an intermediate charge store having a charge store internal resistance, the charge store internal resistance having a lower resistance than the battery internal resistance, and a switch provided in the electrical connection between the energy accumulator and the fuel cell, comprising the step of:
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regulating a system voltage of the fuel cell system in response to an opening or closing of the switch to charge the energy accumulator so as to maintain the system voltage within a predefined voltage range; wherein the battery is charged during the time periods in which the switch is open using the intermediate charge store. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification