Power pack and cordless power tool having the same

Details Power pack and cordless power tool having the same Power pack and cordless power tool having the same

2011-06-28

2011-06-28

Koval, Melissa J (Department: 2858)

Electricity: battery or capacitor charging or discharging

Cell or battery charger structure

For handheld device

C320S112000

Reexamination Certificate

active

07969116

ABSTRACT:
A compact battery pack with high handling ability and restraining degradation of battery cells. The battery pack includes an insertion portion to be inserted into a handle portion of a cordless power tool and an accommodation portion in which all battery cells are accommodatable. A protection board with a protection circuit that protects batteries against overcharge and over-discharge is installed in the insertion portion. A switching element is connected between the battery cells and a drive motor of the power tool. An air passage in communication with the battery pack is formed within the handle and a main housing of the cordless power tool. The switching element is positioned at the air passage.

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