POWER SUPPLIES AND ULTRACAPACITOR BASED BATTERY SIMULATOR
First Claim
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1. An electrical circuit for use in a power system, comprising:
- a number of ultracapacitors electrically coupled in series;
a charging current limiter electrically coupled in series with the ultracapacitors; and
a bypass element electrically coupled across the charging current limiter and operable to provide a path bypassing the charging current limiter.
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Abstract
An ultracapacitor based power storage device suitable for use in hybrid fuel cell systems and other power systems includes circuitry for simulating the response of a battery. A voltage current limiting circuit may be employed with a variety of electrical storage devices, for example, ultracapacitors and batteries.
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Citations
31 Claims
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1. An electrical circuit for use in a power system, comprising:
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a number of ultracapacitors electrically coupled in series;
a charging current limiter electrically coupled in series with the ultracapacitors; and
a bypass element electrically coupled across the charging current limiter and operable to provide a path bypassing the charging current limiter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electrical circuit for use in a power system, comprising:
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a number of ultracapacitors electrically coupled in series;
a linear mode charging current limiter electrically coupled in series with the ultracapacitors; and
a bypass element electrically coupled across the charging current limiter and to selectively provide a bypass of the charging current limiter. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of operating a power system comprising a power bus and a plurality of ultracapacitors electrically coupled to one another in series, the method comprising:
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during a first period, supplying a charging current via a charging current limiter to the plurality of ultracapacitors, the current limiter limiting the charging current supplied to the plurality of ultracapacitors below a charging current limit threshold; and
during a second period, discharging the plurality of ultracapacitors via a discharge element that bypasses the charging current limiter. - View Dependent Claims (19, 20, 21, 22, 23)
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24. An apparatus to use in a power system, the apparatus comprising:
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electrical power storing means for storing electrical power;
charging current limiting means for limiting a charging current supplied to the electrical power storing means below a charging current limit threshold; and
discharging means for discharging electrical power stored by the electrical power storing means that bypasses the charging current limiting means. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification