Patent ID: 11923515
Assignee: TECHTRONIC POWER TOOLS TECHNOLOGY LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC H

Claim 0:
1. A lithium-polymer based battery pack for powering a hand held power tool or a garden tool, the battery pack comprising:
a housing selectively connectable to and supportable by a hand held power tool or a garden tool; and
a plurality of battery cells located within the housing, the plurality of cells being interconnected to have a combined nominal output voltage of at least 4 volts and being capable to produce an average discharge current of greater than 10 amps, wherein each battery cell has a lithium-polymer based chemistry and a nominal charged internal impedance of less than or equal to approximately 10 milliohms,
wherein each of the plurality of battery cells is supported within the housing in a resiliently deformable cradle surrounding at least a part of each battery cell, wherein each resiliently deformable cradle includes side edges so as to provide mechanical protection for sides of each of the plurality of battery cells,
wherein a cradle frame fitted with a cover is arranged to hold a stack of the plurality of battery cells, each of the plurality of battery cells held within its own respective resiliently deformable cradle,
wherein the cradle frame fits within the housing,
wherein the cradle frame is a case enclosure having a base and four surrounding side walls defining a cavity for holding the stack of the plurality of battery cells,
wherein an opening is provided in each of two opposed side walls of the four surrounding side walls of the case enclosure to allow space for and accommodate connection access to a plurality of terminal tabs connecting the plurality of battery cells within the case enclosure, and
wherein each of the plurality of terminal tabs are provided with an exposed connection terminal disposed on a surface of the cover.