System and method for extracting energy from an ultracapacitor

Details System and method for extracting energy from an ultracapacitor System and method for extracting energy from an ultracapacitor

2004-03-30

2009-06-02

Tso, Edward (Department: 2838)

Electricity: battery or capacitor charging or discharging

Capacitor charging or discharging

For large capacitance

C320S166000, C320S162000, C320S164000

Reexamination Certificate

active

07541782

ABSTRACT:
An extraction system detects a voltage stored in a capacitor and then extracts energy from the capacitor when the voltage falls below a predetermined value. The capacitor may be an ultracapacitor formed in silicon or another semiconductor material, and the predetermined value may equal or be based on a minimum operating voltage of a load driven by the ultracapacitor. Once the energy is extracted, the system converts the energy into a voltage sufficient to continue driving the load. Energy extraction may be performed by a variety of circuits including a linear regulator, a switched capacitor voltage converter, an adiabatic amplifier, and a DC-to-DC boost converter. The system may further include a monitoring circuit which detects dynamic changes in the converted ultracapacitor voltage over to maintain the operating voltage of the load.

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http://www.maxwell.com/ultracapacitors/index.html.
David Linden (editor), Thomas B. Reddy (editor),Handbook of Batteries, McGraw-Hill Professional, 3rd Edition, Chapters 42 and 43, Aug. 30, 2001.

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