Correction device and correction method for secondary batteries connected in series
First Claim
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1. A correction device for secondary batteries for correcting a difference among the secondary batteries during a charge operation, comprising:
- a voltage difference detection circuit for detecting variation in terminal voltages of at least two secondary batteries connected in series; and
a discharge circuit for discharging one of the at least two secondary batteries which has a maximum terminal voltage, when the variation in the terminal voltages exceeds a preset value.
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Abstract
A correction device for secondary batteries comprises a voltage difference detection circuit for detecting variation in terminal voltages of at least two secondary batteries connected in series, and a discharge circuit for discharging one of the at least two secondary batteries which has a maximum terminal voltage, when the variation in the terminal voltages exceeds a preset value. The discharge circuit stops discharging when the terminal voltage of the one of the secondary batteries which is discharged becomes lower than a reference value.
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Citations
24 Claims
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1. A correction device for secondary batteries for correcting a difference among the secondary batteries during a charge operation, comprising:
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a voltage difference detection circuit for detecting variation in terminal voltages of at least two secondary batteries connected in series; and a discharge circuit for discharging one of the at least two secondary batteries which has a maximum terminal voltage, when the variation in the terminal voltages exceeds a preset value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 18, 19)
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13. A correction method of correcting a difference among secondary batteries connected in series during a charge operation, comprising the steps of:
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detecting variation in terminal voltages of at least two secondary batteries connected in series; and discharging one of the at least two secondary batteries which has a maximum terminal voltage, when the variation exceeds a preset value. - View Dependent Claims (14)
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20. A correction device for secondary batteries for correcting a difference among the secondary batteries during a charge operation, comprising:
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a direct voltage detection circuit for directly detecting a terminal voltage of each of at least two secondary batteries connected in series; a voltage difference detection circuit for detecting variation in said terminal voltages of said at least two secondary batteries; and a discharge circuit for discharging one of the at least two secondary batteries which has a maximum terminal voltage, when the variation in the terminal voltages exceeds a preset value. - View Dependent Claims (21, 22, 23)
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24. A correction method of correcting a difference among secondary batteries connected in series during a charge operation, comprising the steps of:
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directly detecting a terminal voltage of each of at least two secondary batteries connected in series; detecting a variation in said terminal voltages of said at least two secondary batteries; and discharging one of the at least two secondary batteries which has a maximum terminal voltage, when the variation exceeds a preset value.
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Specification