Back to results
US 2010/0148729 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
Estimating the term…
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 the housing and operable to control a function of the battery pack, and a heat sink in heat transfer relationship with the circuit and operable to dissipate heat from the circuit.
Claims14
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 power tool;
- a plurality of rechargeable Lithium-ion battery cells arranged within and supported by the housing, each of the battery cells having a respective state of charge, the battery pack having a state of charge, power being transferable between the battery cells and the power tool;
- a control circuit supported by the housing and operable to control a plurality of functions of the battery pack including discharging functions, the control circuit including a controller, the control circuit configured to control at least one function of the battery pack based on a monitored state of charge;
- a switch configured, when open, to disable transfer of power between the battery cells and the power tool, the switch further configured, when closed, to enable transfer of power between the battery cells and the power tool, the switch including at least one field effect transistor (FET);
- and
- a heat sink in heat transfer relationship with the switch and operable to dissipate heat from the switch,
- wherein the battery pack and the power tool can be selectively separated from one another, and
- wherein the switch and the heat sink are components of the battery pack.
6 more elements
Dependencies are inferred from the claim text.