Battery pack comprising hollow portion and power tool using the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 6, 2002
Grant Date -
N/A
app pub date -
Mar 10, 2000
filing date -
Mar 12, 1999
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A battery pack having a plurality of battery cells stored side by side in a case. The case, in particular, includes a bottomed trough and a lid, the trough having a space as a cell storage portion defined between inner and outer wall portions paired to form a loop and a space as a hollow surrounded by the inner wall portion and penetrating the trough from top to bottom, the lid closing a top opening of the cell storage portion. The battery cells are arranged in a loop along the inner and outer wall portions, whereby a rise and variation in their temperature can be restrained.
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