Lithium-based battery pack for a high current draw, hand held power tool
First Claim
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1. A battery pack for powering a hand held power tool, the battery pack comprising:
- a housing connectable to and supportable by the hand held power tool; and
a plurality of battery cells supported by the housing, the battery cells being capable of producing an average discharge current greater than or equal to approximately 20 amps, the battery cells having a lithium-based chemistry, the battery cells having a combined nominal voltage of approximately 18 volts,wherein each of the plurality of battery cells is cylindrical and has a cell diameter and a cell length, the cell length being at least twice the cell diameter.
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Abstract
A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell.
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Citations
24 Claims
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1. A battery pack for powering a hand held power tool, the battery pack comprising:
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a housing connectable to and supportable by the hand held power tool; and a plurality of battery cells supported by the housing, the battery cells being capable of producing an average discharge current greater than or equal to approximately 20 amps, the battery cells having a lithium-based chemistry, the battery cells having a combined nominal voltage of approximately 18 volts, wherein each of the plurality of battery cells is cylindrical and has a cell diameter and a cell length, the cell length being at least twice the cell diameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 19, 20, 21)
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9. A battery pack for powering a hand held power tool, the battery pack comprising:
a housing connectable to and supportable by the hand held power tool; and a plurality of battery cells supported by the housing, the battery cells being capable of producing an average discharge current greater than or equal to approximately 20 amps, the battery cells having a lithium-based chemistry, the battery cells having a combined nominal voltage of approximately 14.4 volts, wherein each of the plurality of battery cells is cylindrical and has a cell diameter and a cell length, the cell length being at least twice the cell diameter. - View Dependent Claims (10, 22, 23, 24)
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11. A battery pack for powering a hand held power tool, the battery pack comprising:
a housing connectable to and supportable by the hand held power tool; and a plurality of battery cells supported by the housing, the battery cells being capable of producing an average discharge current greater than or equal to approximately 20 amps, the battery cells having a lithium-based chemistry, the battery cells having a combined nominal voltage of approximately 12 volts, wherein each of the plurality of battery cells is cylindrical and has a cell diameter and a cell length, the cell diameter being less than half the cell length. - View Dependent Claims (12)
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13. A battery pack for powering a hand held power tool, the battery pack comprising:
a housing connectable to and supportable by the hand held power tool; and a plurality of battery cells supported by the housing, the battery cells being capable of producing an average discharge current greater than or equal to approximately 20 amps, the battery cells having a lithium-based chemistry, the battery cells having a combined nominal voltage of approximately 9.6 volts, wherein each of the plurality of battery cells is cylindrical and has a cell diameter and a cell length, the cell diameter being less than half the cell length. - View Dependent Claims (14)
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15. A battery pack for powering a hand held power tool, the battery pack comprising:
a housing connectable to and supportable by the hand held power tool; and a plurality of battery cells supported by the housing, the battery cells being capable of producing an average discharge current greater than or equal to approximately 20 amps, the battery cells having a lithium-based chemistry, the battery cells having a combined nominal voltage of approximately 21 volts, wherein each of the plurality of battery cells is cylindrical and has a cell diameter and a cell length, the cell length being at least twice the cell diameter. - View Dependent Claims (16)
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17. A battery pack for powering a hand held power tool, the battery pack comprising:
a housing connectable to and supportable by the hand held power tool; and a plurality of battery cells supported by the housing, the battery cells being capable of producing an average discharge current greater than or equal to approximately 20 amps, the battery cells having a lithium-based chemistry, the battery cells having a combined nominal voltage of approximately 24 volts, wherein each of the plurality of battery cells is cylindrical and has a cell diameter and a cell length, the cell length being at least twice the cell diameter. - View Dependent Claims (18)
Specification