SYSTEM AND METHOD FOR RECHARGEABLE BATTERY
First Claim
1. A rechargeable battery comprising:
- a plurality of cell strings, each cell string having a plurality of rechargeable electrochemical cells connected in series; and
a plurality of charge regulators, each charge regulator connected in series with one of the plurality of cell strings, wherein each charge regulator is adapted to limit at least one of a charge voltage or a charge current applied to the cell string based on a determined top-of-charge voltage for each cell string.
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Abstract
A rechargeable battery has a plurality of cell strings each having a plurality of rechargeable electrochemical cells connected in series, and a plurality of charge regulators each connected in series with one of the cell strings. Each charge regulator is adapted to limit a charge voltage or current applied to the cell string based on a determined top-of-charge voltage for each cell string. In an embodiment, the rechargeable battery has a monitoring system to sense an operating parameter of the cell string and determine the top-of-charge voltage, and each of the charge regulators includes a charge voltage controller in communication with the monitoring system. In another embodiment, the rechargeable battery has discharge regulators each connected in series with one of the cell strings, and adapted to limit a discharge voltage or current from a given cell string based upon at least one monitored parameter of the cell string.
59 Citations
30 Claims
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1. A rechargeable battery comprising:
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a plurality of cell strings, each cell string having a plurality of rechargeable electrochemical cells connected in series; and a plurality of charge regulators, each charge regulator connected in series with one of the plurality of cell strings, wherein each charge regulator is adapted to limit at least one of a charge voltage or a charge current applied to the cell string based on a determined top-of-charge voltage for each cell string. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of operating a rechargeable battery system comprising:
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determining a top-of-charge voltage for each of a plurality of cell strings of a rechargeable battery, each cell string having a plurality of electrochemical cells and a charge regulator and a discharge regulator in series with the electrochemical cells, wherein the top-of-charge voltage is determined based on at least one first monitored parameter of the cell string; operating the charge regulator of each cell string to limit at least one of a charge voltage or a charge current applied to the cell string based on the determined top-of-charge voltage for the cell string; and operating the discharge regulator of each cell string to limit at least one of a discharge voltage or a discharge current from the cell string based upon the at least one first monitored parameter of the cell string or based upon at least one second monitored parameter of the cell string. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A rechargeable battery comprising:
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a plurality of cell strings, each cell string having a plurality of rechargeable electrochemical cells connected in series; and for each cell string; a respective charge regulator connected in series with the cell string, wherein the charge regulator is adapted to limit at least one of a charge voltage or a charge current applied to the cell string based on at least one first monitored parameter of the cell string; and a respective discharge regulator connected in series with the cell string, wherein the discharge regulator is adapted to limit at least one of a discharge voltage or a discharge current from the cell string based on the at least one first monitored parameter of the cell string or at least one second monitored parameter of the cell string. - View Dependent Claims (28, 29, 30)
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Specification