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Battery pack with heat sink

  • US 9,912,020 B2
  • Filed: 03/12/2014
  • Issued: 03/06/2018
  • Est. Priority Date: 03/12/2013
  • Status: Active Grant
First Claim
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1. A battery pack comprising:

  • a housing including a plurality of walls, an inner cavity and an interface for receiving a power tool, the interface including electrical terminals operable to interface with the power tool;

    battery cells positioned within the inner cavity and electrically coupled to the electrical terminals; and

    a heat sink forming at least a portion of one of the plurality of walls of the housing to at least partially define the inner cavity;

    wherein the heat sink includes a first surface exposed to the inner cavity and second surface exposed to an external environment of the battery pack,wherein the first surface comprises a plurality of rounded grooves, each of the rounded grooves curved with an internal radius conforming to a shape of the battery cells,wherein the second surface comprises a plurality of projections oriented opposite the power tool with respect to the battery cells and extending out from the second surface,the first surface and the second surface are surfaces of a single metal component for conducting heat from the first surface to the second surface, andwherein the plurality of projections occupy a first area on the second surface, and the second surface further includes a second area including the first area and a space surrounding the first area and the plurality of projections.

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