Abstract: This invention includes a tapered electrode assembly for providing a crumple zone in a rechargeable cell. The taper, which may be curvilinear, angular or piecewise linear, allows a void to exist between the corner of the metal can and the electrode assembly. This “crumple zone” prevents any external damage to the can from damaging the internal electrode assembly. The invention facilitates passage of common OEM drop testing without compromising cell performance or energy storage capacity. The invention increases the reliability of the cell by allowing the cell to resist external impacts.

Abstract: A machine for removing debris from an object, like a battery cell for example, is provided. The machine includes a means for holding the object, and a movable cutting member. The means for holding includes a fixed base and an adjustable, spring loaded loop or belt. One opens the belt by pulling a lever. The object is inserted until one side contacts a leveling plane. Once the object is inserted, another lever actuates a sliding block that causes the blade of the cutting member to slide across the side of the object, thereby shaving off any debris that may be on the object. Once the object is removed from the machine, the newly clean, shaven side is prepared so as to be suitable for manufacturing processes like welding.