US 7,944,173 B2
Lithium-based battery pack for a high current draw, hand held power toolGeneral
US 7,944,173 B2
Lithium-based battery pack for a high current draw, hand held power tool
Tech Center:
2800 Semiconductors/Memory, Circuits/Measuring and Testing, Optics/Photocopying, Printing/Measuring and Testing
Examiner:
Edward Tso
Art Unit:
2858 Printing/Measuring and Testing
Inventors:
Todd W. Johnson; Dennis J. Grzybowski; Mark A. Kubale; Jay J. Rosenbecker; Karl F. Scheucher; Gary D. Meyer; Jeffrey M. Zeiler; Kevin L. Glasgow
Assignee:
Priority:
11/22/02
Filed:
12/09/08
Granted:
05/17/11
Expiration:
11/22/22
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.
Cooperative Patent Classification (CPC)
H01H01M10/4257H01MH02J7/00038H02JY02E60/10Y02E