Sealing system for a terminal feed-through
A battery includes an outer wall having a through-hole defined by a peripheral opening edge, at least one cell having a positive electrode and a negative electrode, an electrically conductive terminal stud connected to the positive electrode or the negative electrode, including a shaft extending through the through-hole, and at least one clamping element sitting on the shaft and covering the through-hole, and forming an annular gap together with the outer wall, an electrically insulating and annular support element surrounding the shaft of the terminal stud in a sleeve-like manner, and having an outward-facing peripheral contact surface against which the opening edge of the through-hole lies, wherein the support element includes a glass or a ceramic, or a glass- or ceramic-based composite material, and a sealing element arranged concentrically around the support element in the gap between the clamping element and the outer wall.
1. A battery comprising:
a metal housing having a housing outer wall having a through-hole defined by a peripheral opening edge,
at least one individual cell having at least one positive electrode and at least one negative electrode arranged in an interior of the housing,
an electrically conductive terminal stud connected to the at least one positive electrode or to the at least one negative electrode, comprising a shaft extending through the through-hole, and at least one clamping element sitting on the shaft and covering the through-hole, and forming an annular gap together with the housing outer wall,
an electrically insulating and annular support element surrounding the shaft of the terminal stud in a sleeve-like manner, and having an outward-facing peripheral contact surface against which the opening edge of the through-hole lies, wherein the support element comprises a glass, a ceramic, or a glass- or ceramic-based composite material, and
a sealing element comprising a plastic and arranged concentrically around the support element in the gap between the clamping element and the housing outer wall.
2. The battery as claimed in claim 1 , wherein the sealing element is formed in the gap and/or by injection-molding.
3. The battery as claimed in claim 1 , wherein the support element incorporates an annular groove in which the opening edge of the through-hole is accommodated.
4. The battery as claimed in claim 1 , wherein the support element comprises two annular half-sections.
5. The battery as claimed in claim 1 , wherein the terminal stud comprises metal.
6. A terminal feed-through for the battery according to claim 1 , comprising:
a housing panel having a peripheral outer edge and a through-hole with a peripheral opening edge,
an electrically conductive terminal stud having a shaft extending through the through-hole, and at least one clamping element sitting on the shaft, covering the through-hole and, in combination with the housing panel, forming an annular gap, and
an electrically insulating and annular support element surrounding the shaft of the terminal stud in a sleeve-like manner, and having an outward-facing peripheral contact surface against which the opening edge of the through-hole lies directly.
7. The terminal feed-through as claimed in claim 6 , further comprising a sealing element arranged concentrically around the support element in the gap between the clamping element and the housing panel.
8. A method of producing the battery, comprising:
providing a terminal feed-through as claimed in claim 6 , and
injecting a liquid polymer compound into the gap between the housing panel and the clamping element to form a sealing element in the gap.
9. The method as claimed in claim 8 , further comprising:
providing a housing wall having a through-hole, and
closing the through-hole by insertion of the terminal feed-through in the through-hole, and
bonding the housing panel with the housing wall.