System and method for monitoring battery aging
First Claim
1. A system for monitoring aging of a battery which comprises a plurality of cells connected in series and able to be fully discharged, said system comprising:
- discharger means for discharging a previously-charged one of said plurality of cells at a time, to an end of discharge value;
measuring means for measuring a respective quantity of electricity supplied by said previously-charged one of said plurality of cells during discharging thereof; and
processor means for processing said respective quantity of electricity to detect excessive aging of said battery.
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Abstract
A system for monitoring aging of a battery comprising a plurality of cells connected in series and able to be fully discharged comprises a discharger which discharges one of the previously charged cells at a time to an end of discharge value. The quantity of electricity supplied by each discharged cell during discharging is measured. The quantity of electricity supplied by at least one discharged cell is processed to detect excessive aging of the battery. Excessive aging of the battery results in a residual capacity which is less than a fraction of the nominal capacity of the battery.
144 Citations
32 Claims
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1. A system for monitoring aging of a battery which comprises a plurality of cells connected in series and able to be fully discharged, said system comprising:
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discharger means for discharging a previously-charged one of said plurality of cells at a time, to an end of discharge value; measuring means for measuring a respective quantity of electricity supplied by said previously-charged one of said plurality of cells during discharging thereof; and processor means for processing said respective quantity of electricity to detect excessive aging of said battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of monitoring aging of a battery which comprises a plurality of cells connected in series, said method comprising the steps of:
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discharging one of said plurality of cells at a time to a preselected end of discharge value; measuring a respective quantity of electricity supplied a respective one of said plurality of cells during discharging thereof; and processing said respective quantity of electricity to detect excessive aging of said battery, and generating an alarm message when said excessive aging of said battery is detected. - View Dependent Claims (14, 15, 16)
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17. A system for monitoring the aging of a fully dischargeable battery that has series-connected cells, said system comprising:
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a discharger for discharging, one at a time, a respective cell of said battery; means for measuring a respective quantity of electricity supplied by said respective cell, and a processor; wherein each of said series-connected cells has a respective nominal cell capacity, and a respective cell charging range of 0% to 100% of said respective nominal cell capacity; wherein said discharger discharges said respective cell to a preselected end of discharge value, which is within said respective cell charging range; wherein said measuring means provides a measurement of said respective quantity of electricity of said respective cell at said preselected end of discharge value; and wherein said processor detects excessive aging of said battery by processing said measurement of said respective quantity of electricity. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of monitoring the aging of a battery comprising series-connected cells, said method comprising the steps of:
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discharging, one at a time, a respective cell of said battery to a preselected end of discharge value, wherein said preselected end of discharge value is within a respective cell charging range of 0% to 100% of a respective nominal cell capacity of said respective cell; measuring a respective quantity of electricity supplied by said respective cell during discharging thereof to provide a measurement of said respective quantity of electricity; processing said measurement of said respective quantity of electricity to detect excessive aging of said battery; and generating an alarm message in response when said excessive aging is detected. - View Dependent Claims (30, 31, 32)
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Specification