Energy storage systems
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United States of America Patent
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Jul 16, 2013
Grant Date -
Aug 25, 2011
app pub date -
Feb 17, 2011
filing date -
Feb 19, 2010
priority date (Note) -
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Abstract
The present invention provides an energy storage device that utilizes a cold sink that undergoes cycles of freezing and thawing. The device converts electrical energy to stored thermal energy, and then re-converts the stored thermal energy to electrical energy, as needed or desired. The device can store energy on a large scale (e.g., on the order of megawatts or greater) and for an extended period of time (e.g., for at least 12 hours, or longer, as needed).
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