Charge-discharge control circuit, over-charge prevention circuit, and over-discharge prevention circuit
First Claim
Patent Images
1. A charge-discharge control circuit for preventing over-charge and over-discharge of a plurality of series connected batteries comprising:
- (1) a detection circuit for determining the state of charge and discharge of the plurality of series connected batteries;
(2) at lease one bypass circuit connected in parallel with one of the series connected batteries, said at least one bypass circuit including a rechargeable auxiliary battery and associated over-charge protection components connected in parallel with the auxiliary battery; and
(3) a connection circuit which, in response to detection results from said detection circuit, selectively connects said at least one bypass circuit to one of said plurality of series connected batteries determined to be in an approximately fully charged state or approximately fully discharged state.
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Abstract
The charge-discharge control circuit prevents over-charge and over-discharge of a plurality of series connected batteries. It is provided with a detection circuit to determine the state of charge and discharge of the batteries, at least one bypass circuit connected in parallel with one of the batteries, and a connection circuit which, in response to results from the detection circuit, selectively connects the bypass circuit to a battery determined to be in an approximately fully charged state or approximately fully discharged state.
54 Citations
30 Claims
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1. A charge-discharge control circuit for preventing over-charge and over-discharge of a plurality of series connected batteries comprising:
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(1) a detection circuit for determining the state of charge and discharge of the plurality of series connected batteries; (2) at lease one bypass circuit connected in parallel with one of the series connected batteries, said at least one bypass circuit including a rechargeable auxiliary battery and associated over-charge protection components connected in parallel with the auxiliary battery; and (3) a connection circuit which, in response to detection results from said detection circuit, selectively connects said at least one bypass circuit to one of said plurality of series connected batteries determined to be in an approximately fully charged state or approximately fully discharged state. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An over-charge prevention circuit for preventing over-charge of a plurality of series connected batteries comprising:
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(1) a detection circuit for determining the state of charge of each of the plurality of series connected batteries being charged; (2) at least one bypass circuit connected in parallel with one of the series connected batteries, said at least one bypass circuit including a rechargeable auxiliary battery and associated over-charge protection components connected in parallel with the auxiliary battery; and (3) a connection circuit which, in response to detection results from said detection circuit, selectively connects said at least one bypass circuit to one of said plurality of series connected batteries determined to be in an approximately fully charged state. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An over-discharge prevention circuit for preventing over-discharge of a plurality of series connected batteries comprising:
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(1) a detection circuit for determining the state of discharge of each of the plurality of series connected batteries being charged; (2) at least one bypass circuit connected in parallel with one of the series connected batteries, said at least one bypass circuit including a rechargeable auxiliary battery and associated over-charge protection components connected in parallel with the auxiliary battery; and (3) a connection circuit which, in response to detection results from said detection circuit, selectively connects said at least one bypass circuit to one of said plurality of series connected batteries determined to be in an approximately fully discharged state. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A charge-discharge control circuit for preventing over-charge and over-discharge of a plurality of series connected batteries comprising:
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(1) a detection circuit for determining the state of charge and discharge of the plurality of series connected batteries; (2) at least one bypass circuit connected in parallel with one of the plurality of series connected batteries, and the number of bypass circuits is less than the number of series connected batteries; and (3) a connection circuit which, in response to detection results from the detection circuit, selectively connects said at least one bypass circuit to one of the plurality of series connected batteries determined to be in an approximately fully charged stated and in the most advancedly charged state when the batteries are being charged and to one of the plurality of series connected batteries determined to be in an approximately fully discharged state and in the most advancedly discharged state when the batteries are being discharged. - View Dependent Claims (20, 21, 22)
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23. An over-charge prevention circuit for preventing over-charge of a plurality of series connected batteries comprising:
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(1) a detection circuit for determining the state of charge of each of the plurality of series connected batteries being charged; (2) at least one bypass circuit connected in parallel with one of the plurality of series connected batteries, and the number of bypass circuits is less than the number of series connected batteries; and (3) a connection circuit which, in response to detection results from the detection circuit, selectively connects the at least one bypass circuit to one of the plurality of series connected batteries determined to be in an approximately fully charged state and in the most advancedly charged state. - View Dependent Claims (24, 25, 26)
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27. An over-discharge prevention circuit for preventing over-discharge of a plurality of series connected batteries comprising:
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(1) a detection circuit for determining the state of discharge of each of the plurality of series connected batteries being charged; (2) at least one bypass circuit connected in parallel with one of the plurality of series connected batteries, and the number of bypass circuits is less than the number of series connected batteries; and (3) a connection circuit which, in response to detection results from the detection circuit, selectively connects the at least one bypass circuit to one of the plurality of series connected batteries determined to be in an approximately fully discharged state and in the most advancedly discharged state. - View Dependent Claims (28, 29, 30)
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Specification