A connection pole, having a longitudinal direction and a radial direction, for a rechargeable battery, the connection pole comprising:
- a connection region for securing a pole terminal to the connection pole;
- a securing region for securing the connection pole to a housing part of the rechargeable battery, the securing region having an end region facing the connection region, the end region comprising:
- a circumferential projection, the circumferential projection having at least substantially an annular shape, a respective upper circular ring surface of the circumferential projection facing the connection region, and a tooth system projecting from an outer circumference of the circumferential projection as a connection pole rotation limiter, wherein the tooth system has toothing in which regularly radially projecting regions are formed, the radially projecting regions extending radially from the outer circumference of the circumferential projection
- a circumferential sealing projection, the circumferential sealing projection having an at least substantially circular-ring shape, a respective upper circular ring surface of the circumferential sealing projection facing the connection region, and a lower circular ring surface facing away from the connection region, the circumferential sealing projection positioned in the end region between the circumferential projection and the connection region;
- a circular-ring-shaped undercut region provided between the circumferential projection and the circumferential sealing projection;
- and
- a labyrinth region formed in the end region, wherein an outer wall of the connection pole, having a circumference, has at least one additional circumferential projection in the labyrinth region, wherein the lower circular ring surface of the circumferential sealing projection faces the at least one additional circumferential projection in the labyrinth region,
- wherein the respective upper circular ring surface of the circumferential sealing projection is covered from an external environment by the housing part where the connection region is positioned proximate to the housing part, each of the housing part and the upper circular ring surface of the circumferential sealing projection extending coplanar along a first plane which is below a section plane between the connection region and the securing region;
- wherein the respective upper circular ring surface of the circumferential projection extends along a second plane that extends parallel to the first plane;
- wherein the lower circular ring surface of the circumferential sealing projection extends along a third plane that extends parallel to and at a distance from the second plane;
- wherein the circular-ring-shaped undercut region is provided between the second plane and the third plane and beneath the first plane;
- wherein the circular-ring-shaped undercut region has a length of 0.3 mm to 0.5 mm, when viewed in the longitudinal direction of the connection pole;
- wherein the circumferential projection and the tooth system together have a length of 0.4 mm to 2.4 mm, when viewed in the longitudinal direction of the connection pole;
- and
- wherein the circumference of the outer wall of the connection pole increases in a direction away from the connection region in at least one region of the labyrinth region which is not provided with the at least one additional circumferential projection.