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US 6,537,694 B1Granted
Battery pack with improved heat radiation and sealing
AssigneeMakita Corporation
InventorsMasatoshi Sugiura, Youichi Kato, Kazuyuki Sakakibara
Life of this patent
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Abstract
A battery pack (1) has a double casing structure, including an inner case (2) disposed inside an outer case (3). The inner case (2) includes a radiator plate (9) that is in contact with the side walls of battery cells (4) disposed within the battery pack (1). A forked air passage (32) extends from an air inlet (27) and is defined between the inner case (2) and the outer case (3) and along the outer surface of the radiator plate (9) until reaching a pair of air outlets (31).
Claims16
A battery pack comprising:
- a first case;
- a second case smaller than the first case, the second case containing a plurality of battery cells and being disposed within the first case;
- a radiator disposed in contact with the cells, the radiator having at least one surface for radiating heat conducted from the battery cells,
- a first air passage formed between the first and second cases and defined at least partially by said at least one surface of the radiator, the first air passage being separated from the battery cells, and
- at least one air outlet formed in the first case and in communication with the first air passage.
2 more elements
Dependencies are inferred from the claim text.