Managing service life of a battery
First Claim
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1. Method for limiting battery power comprising:
- providing an amp-hour threshold;
monitoring amp-hour throughput;
determining a moving average amp-hour throughput from said monitored amp-hour throughput;
when the moving average amp-hour throughput exceeds said amp-hour threshold, establishing a battery power limit as a function of the moving average amp-hour throughput; and
limiting battery power in accordance with said established battery power limit.
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Abstract
A hybrid electric vehicle has an energy storage system including one or more batteries. Battery service life is managed by establishing an amp-hour throughput budget and limiting battery current substantially to the budget.
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Citations
23 Claims
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1. Method for limiting battery power comprising:
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providing an amp-hour threshold;
monitoring amp-hour throughput;
determining a moving average amp-hour throughput from said monitored amp-hour throughput;
when the moving average amp-hour throughput exceeds said amp-hour threshold, establishing a battery power limit as a function of the moving average amp-hour throughput; and
limiting battery power in accordance with said established battery power limit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Method for establishing limits on battery power, comprising:
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determining battery current throughput;
comparing battery current throughput to a predetermined threshold related to a battery life target; and
when the battery current throughput exceeds said threshold, providing a battery power limit effective to reduce the battery current throughput. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. Article of manufacture having program instructions therein for establishing limits on battery power, the program instructions comprising:
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said program instructions comprising;
code for determining battery current throughput;
code for comparing battery current throughput to a predetermined threshold related to a battery life target;
code for providing a battery power limit effective to reduce the battery current throughput when the battery current throughput exceeds said threshold; and
a computer readable medium that stores the code. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. Method for achieving a predetermined service life of a battery comprising:
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monitoring battery current; and
limiting a temporal average of absolute value of said monitored battery current to a threshold that is related to said predetermined service life.
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Specification