Battery charging system with battery pack of different charging voltages using common a battery charger
First Claim
1. A battery charging system comprising a battery charger and a plurality of rechargeable battery packs each having a different predetermined charge voltage,each of the rechargeable battery packs comprising:
- a rechargeable battery having a predetermined charge voltage; and
a circuit for generating a control voltage depending on a battery voltage of the rechargeable battery so that the control voltage reaches a predetermined control voltage when the battery voltage reaches a predetermined charge voltage of the rechargeable battery,wherein the battery charger charges the rechargeable battery depending on the control voltage received from a rechargeable battery connected thereto.
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Abstract
A rechargeable battery pack includes a rechargeable battery having a predetermined charge voltage, and a circuit for generating a control voltage depending on a battery voltage of the rechargeable battery so that the control voltage reaches a predetermined control voltage when the battery voltage reaches a predetermined charge voltage of the rechargeable battery. A battery charger for the rechargeable battery changes the charging control from constant-current to constant-voltage depending on whether the control voltage reaches the predetermined control voltage.
29 Citations
20 Claims
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1. A battery charging system comprising a battery charger and a plurality of rechargeable battery packs each having a different predetermined charge voltage,
each of the rechargeable battery packs comprising: -
a rechargeable battery having a predetermined charge voltage; and a circuit for generating a control voltage depending on a battery voltage of the rechargeable battery so that the control voltage reaches a predetermined control voltage when the battery voltage reaches a predetermined charge voltage of the rechargeable battery, wherein the battery charger charges the rechargeable battery depending on the control voltage received from a rechargeable battery connected thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A rechargeable battery pack comprising:
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a rechargeable lithium-ion battery having a predetermined charge voltage; and a circuit for generating a control voltage depending on a battery voltage of the rechargeable lithium-ion battery so that the control voltage reaches a predetermined control voltage when the battery voltage reaches a predetermined charge voltage of the rechargeable battery, wherein the predetermined control voltage is set to a common voltage for another rechargeable battery. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A battery charging method for a rechargeable battery pack, comprising the steps of:
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a) generating a control voltage depending on a battery voltage of the rechargeable battery so that the control voltage reaches a predetermined control voltage when the battery voltage reaches a predetermined charge voltage of the rechargeable battery; and b) charging the rechargeable battery depending on the control voltage. - View Dependent Claims (17, 18, 19, 20)
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Specification