Battery charging device method for charging battery pack and battery pack
First Claim
1. A battery charging device for charging a battery pack having a battery cell, said battery pack being capable of storing information indicative of a maximum charging current and a maximum charging voltage of the battery cell and being capable of communicating said information, said battery charging device comprising:
- communication means for receiving said information indicative of the maximum charging current and the maximum charging voltage of the battery cell transmitted from said battery pack;
a variable voltage source for supplying an output voltage;
a variable current source for supplying an output current; and
control means for controlling said variable voltage source and variable current source to supply said output current and voltage upon charging of said battery pack so as not to exceed said maximum charging current and said maximum charging voltage, said variable current source supplying the maximum current prior to said battery pack reaching a predetermined voltage which is less than said maximum charging voltage and said variable voltage source supplying said maximum charging voltage after said battery pack has reached said predetermined voltage.
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Abstract
There is disclosed a battery changing device for charging a battery pack having a battery cell, the battery pack being capable of storing an information for a maximum charging current and a maximum charging voltage of the battery cell and communicating the information with the battery charging device, which includes a communication means for receiving the information indicative of the maximum charging current and the information indicative of the maximum charging voltage of the battery cell which is transmitted from the battery pack, and a control means for controlling charging current and voltage upon charging so as not to exceed the maximum charging current and the maximum charging voltage of the battery cell. Further, in accordance with the present invention, there are disclosed a method for charging the battery pack, and the battery pack capable of being mounted to various electronic apparatuses.
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Citations
20 Claims
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1. A battery charging device for charging a battery pack having a battery cell, said battery pack being capable of storing information indicative of a maximum charging current and a maximum charging voltage of the battery cell and being capable of communicating said information, said battery charging device comprising:
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communication means for receiving said information indicative of the maximum charging current and the maximum charging voltage of the battery cell transmitted from said battery pack; a variable voltage source for supplying an output voltage; a variable current source for supplying an output current; and control means for controlling said variable voltage source and variable current source to supply said output current and voltage upon charging of said battery pack so as not to exceed said maximum charging current and said maximum charging voltage, said variable current source supplying the maximum current prior to said battery pack reaching a predetermined voltage which is less than said maximum charging voltage and said variable voltage source supplying said maximum charging voltage after said battery pack has reached said predetermined voltage. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12)
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6. The battery charging device according to clam 3, wherein a charged voltage of said battery pack does not exceed said maximum charging voltage when the constant-voltage charge is supplied.
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13. A method for charging a battery pack having a battery cell, said battery pack being capable of storing information for a maximum charging current and a maximum charging voltage of the battery cell and being capable of communicating said information, said method comprising the steps of:
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receiving said information for the maximum charging current and the maximum charging voltage of the battery cell transmitted from said battery pack; supplying an output voltage and an output current to said battery cell; and controlling the supplied output voltage and current such that the maximum charging current and the maximum charging voltage of the battery cell are not exceeded upon charging, the maximum current is supplied prior to said battery cell reaching a predetermined voltage which is less than the maximum charging voltage and the maximum voltage is supplied after said battery cell has reached said predetermined voltage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification