Electricity: battery or capacitor charging or discharging – Cell or battery charger structure
Reexamination Certificate
2006-11-13
2010-06-08
Assouad, Patrick J (Department: 2858)
Electricity: battery or capacitor charging or discharging
Cell or battery charger structure
C320S115000, C320S112000, C320S113000
Reexamination Certificate
active
07733054
ABSTRACT:
In a cordless power tool system, high temperature gases created in a battery pack by the battery cells during a charging or discharging operation can be routed into a housing of one of an attached power tool or charger to reduce the temperature of the gases, prior to venting the gases externally. In an example, a battery pack has at least one vent hole for relieving pressure and a movable device covering the vent hole and configured to expose the vent hole upon a pressure set-point within the pack housing being exceeded. In another example, the pack housing includes a thin-walled section designed to break if pressure within the pack housing exceeds a given pressure setpoint. In a further example, the pack housing includes a baffle having an S-shaped cross-section for providing a vent path for gases and for preventing external fluids from entering the pack housing.
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patent: 6903534 (2005-06-01), Minamiura
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Brotto Daniele C.
Casalena Adam M.
Phillips Steven J.
Rice Gregory A.
Trinh Danh T.
Assouad Patrick J
Black & Decker Inc.
Boateng Alexis
Harness & Dickey & Pierce P.L.C.
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