Abstract: A water refilling plug for automatically filling battery cells has a cylindrical plug housing that includes a connector fitting for water delivery into a housing, as well as a valve, actuated by a float, having an annular valve body and a conical valve seat. The valve is arranged between an inflow channel and an outflow channel leading into the battery cell. In accordance with the invention, swirl-generating deflection channels are arranged between the annular inflow channel and the conical valve seat in a pattern distributed over a circumference in the plug.

Abstract: The invention relates to a water filling connector for automatically filling battery cells, having a cylindrical connector housing (12) comprising a connector fitting (26) for water inlet into the housing (12) and a valve actuated by a swimmer and having a ring-shaped valve body (38) and a conical valve seat (42) disposed between an inlet channel (34) and an outlet channel (68) leading into the battery cell. Swirl-generating deflection channels (64) are disposed around the circumference between the ring-shaped inlet channel (34) and the conical valve set (42).

Abstract: A filling plug for battery cells includes a cylindrical housing, a valve system contained in the housing and connected to at least two horizontally protruding feeding tubes. Further, the filling plug includes a float partially projecting downward from the lower portion of the housing for actuating the valve system, and an axially extending tubular snap ring element which is to be inserted into and fastened in a filling opening of the battery cell. The snap ring element has bayonet coupling elements at an outer wall.