Battery set structure and charge/discharge control apparatus for lithium-ion battery
First Claim
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1. A charge circuit capable of simultaneously mounting a plurality of battery packs each using a lithium secondary battery cell or a battery set thereof, comprising:
- a constant voltage/constant current power supply for applying a charge power supply voltage to the battery pack;
a current detection circuit for detecting a charge current of the battery pack;
a regulation circuit for controlling the charge current to a predetermined value; and
control means for shifting a charge mode of the battery pack to a constant voltage charge mode when the charge current of the battery pack, which is supplied from the constant voltage/constant current power supply during a constant charge operation, becomes smaller than a set value, and charging remaining battery packs with a constant current within a charge current control range by the regulation circuit, thereby, before the battery pack during the charge operation is set in a full charge state, charging the remaining battery packs within the charge current control range by the regulation circuit.
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Abstract
A battery charge circuit using a constant voltage/constant current to power charge a plurality of battery packs, a current detection circuit to detect a charge current according to a predetermined value, and control mechanisms to maintain a constant voltage charge mode when the charge current value drops below a set value within the battery pack.
134 Citations
6 Claims
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1. A charge circuit capable of simultaneously mounting a plurality of battery packs each using a lithium secondary battery cell or a battery set thereof, comprising:
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a constant voltage/constant current power supply for applying a charge power supply voltage to the battery pack; a current detection circuit for detecting a charge current of the battery pack; a regulation circuit for controlling the charge current to a predetermined value; and control means for shifting a charge mode of the battery pack to a constant voltage charge mode when the charge current of the battery pack, which is supplied from the constant voltage/constant current power supply during a constant charge operation, becomes smaller than a set value, and charging remaining battery packs with a constant current within a charge current control range by the regulation circuit, thereby, before the battery pack during the charge operation is set in a full charge state, charging the remaining battery packs within the charge current control range by the regulation circuit. - View Dependent Claims (2, 3, 4)
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5. A charge circuit capable of simultaneously mounting a plurality of battery packs each using a lithium secondary battery cell or a battery set thereof, comprising:
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means for setting a charge priority of the battery packs; a constant voltage/constant current power supply for applying a charge power supply voltage to the battery pack selected in accordance with the priority; a current detection circuit for detecting a charge current of the battery pack; a series regulation circuit for controlling the charge current to a predetermined value; and control means for shifting a charge mode of the battery pack to a constant voltage charge mode when the charge current of the battery pack, which is supplied from the constant voltage/constant current power supply during a constant charge operation, becomes smaller than a set value, and charging a next battery pack according to the charge priority with a constant current within a charge current control range by the series regulation circuit, wherein, before the battery pack during the charge operation is set in a full charge state, the next battery pack according to the set priority is charged within the charge current control range by the series regulation circuit.
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6. A charge circuit capable of simultaneously mounting a plurality of battery packs each using a lithium secondary battery cell or a battery set thereof, comprising:
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means for setting a charge priority of the battery packs; a constant voltage/constant current power supply for applying a charge power supply voltage to the battery pack selected in accordance with the priority; a current detection circuit for detecting a charge current of the battery pack; a switching regulation circuit for controlling the charge current to a predetermined value; and control means for shifting a charge mode of the battery pack to a constant voltage charge mode when the charge current of the battery pack, which is supplied from the constant voltage/constant current power supply during a constant charge operation, becomes smaller than a set value, and charging a next battery pack according to the charge priority with a constant current within a charge current control range by the switching regulation circuit, wherein, before the battery pack during the charge operation is set in a full charge state, the next battery pack according to the set priority is charged within the charge current control range by the switching regulation circuit.
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Specification