Battery charging based on cost and life
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United States of America Patent
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Aug 24, 2010
Grant Date -
Jan 22, 2009
app pub date -
Jul 18, 2007
filing date -
Jul 18, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
One embodiment of the present subject matter includes a system that includes a battery, an electric vehicle, the battery coupled to the electric vehicle to propel the electric vehicle, and a charging circuit to charge the battery. The embodiment includes a charging cost circuit to estimate a charging cost rate and to turn on the charging circuit. The embodiment also includes a timer circuit to provide a time signal to the charging cost circuit. The embodiment is configured such that the charging cost circuit is to turn on the charging circuit during a first time period in which the charging cost rate is below a first threshold until the battery reaches a first energy stored level, and to turn on the charging circuit during a second time period in which the charging cost rate is above the first threshold.
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