Through-connector providing an electrical connection through a single or double plastic wall and application thereof to an electrical battery

A sealed electrical through-connector assembly including a barrier of predetermined thickness;

• a connecting member extending through a hole in the barrier;
• a resilient annular seal ring surrounding the connecting member, the seal ring having an uncompressed thickness greater than the thickness of the barrier and an outer perimetral surface making sealing contact with the inner surface of the hole through the barrier;
• a first metal part mounted on said connecting member and positioned on one side of said seal ring;
• a second metal part mounted on the connecting member and positioned on the other side of the seal ring;
• and means for applying a releasable clamping force against said metal parts for axially compressing said seal ring, wherein the improvement comprises:
• rigid spacer means defining the positions of said parts relative to each other, thereby determining a fixed compression of the seal ring for any clamping force above a predetermined minimum valve.