Patent ID: 11929465
Assignee: VARTA MICROBATTERY GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An energy storage element comprising:
a housing enclosing an interior space, which housing is formed of a first metal housing part having a substantially circular upper side and a second metal housing part having a substantially circular lower side spaced from and parallel to the substantially circular upper side, and an annular housing side that connects the upper side and the lower side;
a winding arranged in the interior space, which winding comprises 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 the circular upper side and the circular lower side of the housing parts are able movable away from each other along an axis running vertically through the circular upper side and the circular lower side of the housing when a pressure in the interior space of the housing exceeds a threshold value, and
the pin is configured such that the electrical contact to one of the electrodes of the winding is broken when the circular upper side and the circular lower side of the housing parts move away from one another along the axis.