Abstract: A battery pack includes a housing defining an interior volume, a cell pack assembly positioned within the interior, a printed circuit board electrically connected to battery cells, electrical contacts in communication with the battery cells via the printed circuit board and providing electrical power to an external device and a detector in electrical communication with the printed circuit board. The cell pack assembly includes battery cells that collectively define a volume, wherein each battery cell includes a body, an anode extending from the body, and a cathode extending from the body. The body of each cell is configured to expand and contract. When the detector determines that the volume of the battery cells meets or exceeds a threshold volume, the detector is configured to generate a signal configured to warn the operator of a status of the stack or stop current from flowing to and from the battery cells.

Abstract: A battery pack includes a housing, a flexible button, and a switch. The housing includes an opening and a groove. The groove is disposed at least partially about the opening. The flexible button is molded onto the housing in the opening. The flexible button includes a user engagement portion, a sidewall, a lip, and a post. The sidewall extends from the user engagement portion into the housing. The lip extends laterally from the sidewall. The lip includes a ridge protruding into the groove of the housing. The post extends from the user engagement portion. The switch is disposed in the housing. The switch is positioned to be engaged by the post.

Abstract: A battery pack is disclosed and includes a battery housing, a core housing disposed within the battery housing, at least one pouch cell disposed within the core housing, a flexible circuit extending along an inner surface of the core housing, and a temperature sensor operably coupled to the flexible circuit.

Abstract: A device including a conductive path for passing electric current. The device including a terminal and a spring fuse. The spring fuse is connected in the conductive path and is electrically connected to the terminal. The spring fuse includes a fixed base, an extension spring connected to the fixed base at a first end, a power path connection connected to the extension spring at a second end, a plurality of fuse pads, and one or more solder joints configured to connect the power path connection to the plurality of fuse pads. The one or more solder joints are configured to melt when a temperature of the one or more solder joints exceeds a threshold value. The power path connection is configured to retract toward the fixed base when the temperature of the one or more solder joints exceeds a threshold value.

Abstract: An apparatus including a first gas chamber, a second gas chamber, and a coupler. The first gas chamber can include a sleeve including a first mounting point and a cylinder including a second mounting point. In a first mode, the coupler can isolate the first gas chamber and the second gas chamber during a first translation range of the cylinder into the sleeve, and fluidly couple the first gas chamber to the second gas chamber during a second translation range of the cylinder into the sleeve. In a second mode, the coupler can fluidly couple the first gas chamber to the second gas chamber during at least the first translation range and the second translation range of the cylinder into the sleeve.