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US 2011/0215767 A1Published application
Battery pack
AssigneeMilwaukee Electric Tool Corporation
InventorsTodd W. Johnson, Dennis J. Grzybowski, Mark A. Kubale, Jay J. Rosenbecker, Karl F. Scheucher, Gary D. Meyer, Jeffrey M. Zeiler, Kevin L. Glasgow
Life of this patent
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Abstract
A system and method for battery protection. In some aspects, a battery pack includes a housing, a cell supported by the housing, a circuit supported by a flexible circuit board. The circuit is operable to control a function of the battery pack.
Claims15
A lithium-ion battery pack configured to be interfaced with a handheld power tool, the battery pack comprising:
- a battery pack housing;
- a plurality of terminals configured to be interfaced with corresponding terminals of the handheld power tool;
- and
- a plurality of rechargeable lithium-ion battery cells arranged within and supported by the housing, each of the plurality of battery cells having a respective state of charge, the battery pack having a battery pack state of charge, power being transferable from the plurality of battery cells to the handheld power tool;
- wherein the transfer of power from the battery pack is controlled by a control component and a semiconducting switch based on a state of charge of the battery pack, the semiconducting switch electrically connected to at least one of the plurality of terminals, and
- wherein a discharge current from the battery pack is regulated based on the semiconducting switch being controlled into one of a first state and a second state by the control component to selectively enable the transfer power from the plurality of battery cells to the handheld power tool.
3 more elements
Dependencies are inferred from the claim text.