Rechargeable battery pack and charging stand for charging the rechargeable battery pack by electromagnetic induction
First Claim
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1. A battery pack comprising:
- a rectangular-shaped casing having a rectangular bottom face;
at least one rectangular rechargeable battery disposed within said casing,wherein a width of said casing is greater than a width of said rectangular rechargeable battery such that a gap is defined between a side face of said casing and an opposing side face of said rectangular rechargeable battery;
a secondary coil disposed in said gap and in close proximity to said bottom face of said casing, said secondary coil having a central axis that is oriented in an elongated direction of said casing; and
a control circuit for controlling electric power induced in said secondary coil for charging said rectangular rechargeable battery contained in said casing.
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Abstract
A battery pack having at least one rechargeable battery and a secondary coil, which is electromagnetically coupled to a primary coil contained inside of a charging stand. The battery pack also includes a control circuit which controls electric power induced in the secondary coil for charging the rechargeable batteries. The secondary coil of the battery pack is positioned close to the bottom of a battery pack case with its center axis oriented along the elongated direction of the case. The charging stand contains the primary coil, which is located so as to be close to the secondary coil when the battery pack is mounted on the charging stand.
218 Citations
15 Claims
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1. A battery pack comprising:
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a rectangular-shaped casing having a rectangular bottom face; at least one rectangular rechargeable battery disposed within said casing, wherein a width of said casing is greater than a width of said rectangular rechargeable battery such that a gap is defined between a side face of said casing and an opposing side face of said rectangular rechargeable battery; a secondary coil disposed in said gap and in close proximity to said bottom face of said casing, said secondary coil having a central axis that is oriented in an elongated direction of said casing; and a control circuit for controlling electric power induced in said secondary coil for charging said rectangular rechargeable battery contained in said casing. - View Dependent Claims (2)
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3. A battery pack comprising:
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a rectangular-shaped casing having a bottom face; at least one rectangular rechargeable battery disposed within said casing, wherein a length of said casing is greater than a length of said rectangular rechargeable battery in order to define a gap between the bottom face of said casing and an opposing lower face of said rectangular rechargeable battery; a secondary coil disposed in said gap and in close proximity to said bottom face of said casing, said secondary coil having a central axis that is oriented in an elongated direction of said casing; and a control circuit for controlling electric power induced in said secondary coil for charging said rectangular rechargeable battery contained in said casing. - View Dependent Claims (4)
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5. A battery pack comprising:
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a rectangular casing having a bottom face; at least one rectangular rechargeable battery disposed within said casing, said rechargeable battery being sized so that a peripheral gap is defined between the periphery of said battery and an inner peripheral surface of said casing and a lower gap is defined between a lower surface of said battery and the bottom face of said casing; a secondary coil disposed in said peripheral gap around a lower portion of said battery, said second coil extending below said rechargeable battery in close proximity to said bottom face of said casing, and said secondary coil having a central axis that is oriented in an elongated direction of said casing; and a control circuit disposed in said casing for controlling electric power induced in said secondary coil for charging said rechargeable battery contained in said casing. - View Dependent Claims (6)
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7. A combination of a battery pack and a charging stand for charging said battery pack, wherein:
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a) said battery pack comprises; an elongated rectangular casing having a bottom face; at least one rectangular rechargeable battery disposed in said casing, wherein a width of said casing is greater than a width of said rectangular rechargeable battery such that a gap is defined between a side face of said casing and an opposing side face of said rectangular rechargeable battery; a secondary coil located in said gap in close proximity to the bottom face of said casing, said secondary coil having a central axis which is oriented in the same direction as a longitudinal direction of said casing; and a control circuit for controlling electric power induced in said secondary coil for charging said rectangular rechargeable battery, and b) said charging stand comprises; a charging stand case; and a primary coil positioned in said charging stand case so as to be close to said secondary coil when said battery pack is placed in said charging stand, wherein said primary coil is excitable by alternating current so as to induce alternating current in said secondary coil due to electromagnetic induction. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A combination of a battery pack and a charging stand, wherein:
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a) said battery pack comprises; an elongated rectangular casing having a bottom face and a length; at least one rectangular rechargeable battery disposed in said casing, wherein the length of said casing is greater than a length of said rectangular rechargeable battery such that a gap is defined between the bottom face of said casing and an opposing lower face of said rectangular rechargeable battery; a secondary coil located in said gap in close proximity to the bottom face of said casing, said secondary coil having a central axis which is oriented in the same direction as a longitudinal direction of said casing; and a control circuit for controlling electric power induced in said secondary coil for charging said rectangular rechargeable battery, and b) said charging stand comprises; a charging stand case; and a primary coil positioned in said charging stand case so as to be close to said secondary coil when said battery pack is placed in said charging stand, wherein said primary coil is excitable by alternating current so as to induce alternating current in said secondary coil due to electromagnetic induction. - View Dependent Claims (14)
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15. A combination of a battery pack and a charging stand, wherein:
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a) said battery pack comprises; an elongated rectangular casing having a bottom face and a length; at least one rectangular rechargeable battery disposed in said casing, said battery being sized so that a peripheral gap is defined about the periphery of said battery and an inner peripheral surface of said casing, and a lower gap is defined between a lower surface of said battery and the bottom face of said casing; a secondary coil surrounding a lower portion of said battery and being located in said peripheral gap in close proximity to the bottom face of said casing, said secondary coil having a central axis which is oriented in the same direction as a longitudinal direction of said casing; and a control circuit for controlling electric power induced in said secondary coil for charging said rectangular rechargeable battery, and b) said charging stand comprises; a charging stand case; and a primary coil positioned in said charging stand case so as to be close to said secondary coil when said battery pack is placed in said charging stand, wherein said primary coil is excitable by alternating current so as to induce alternating current in said secondary coil due to electromagnetic induction.
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Specification