Varta Microbattery Gmbh

Nils Barenthin

An energy storage element includes a housing enclosing an interior space, which housing is formed of a first metal housing part and a second metal housing part and has a substantially circular upper side and a substantially circular lower side spaced from one another and parallel to one another, and an annular housing side that connects the upper side and the lower side; a winding arranged in the interior, which winding includes a strip-shaped positive and a strip-shaped negative electrode and a strip-shaped separator arranged between the electrodes that are wound in a spiral around a winding axis; wherein the winding has a first end face and a second end face and an annularly circumferential winding outer side, the first and second end faces face in the direction of the circular and mutually parallel upper side and lower side such that the winding axis is oriented perpendicular or at least substantially perpendicular to the upper side and the lower side, and the winding has an axial cavity through which the winding axis runs; and an electrically conductive pin arranged in the cavity and electrically connects one of the electrodes of the winding to one of the housing parts, wherein the first and the second housing part are designed such that they are able moveable against each other along an axis running vertically through the circular upper side and the circular lower side of the housing, and the pin is configured such that the electrical contact to one of the electrodes of the winding is broken when the housing parts move away from one another along the axis.

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Ellwangen, Germany

Nils Barenthin