Deutsche Automobilgesellschaft Mbh

Daug-Hoppecke Gesellschaft Fur Batteriesysteme Mbh

Willi Kitzhofer

Otwin Imhof

An electrode matrix with hollow or fibrous structure made of metallized and, optionally, subsequently removed plastic fibers, and a current-collector lug welded-on on one side for electrochemical storage cells. The current-collector lug overlaps the electrode matrix at the periphery on one side, the latter being compressed in the vicinity of the overlap in such a way that the current-collector lug remains within the nominal thickness of the electrode matrix. The current-collector lug has, in the overlap region, a plurality of material projections which project in the direction of the electrode matrix, whose diameters correspond at least approximately to the material thickness of the current-collector lug and which are pressed into the electrode matrix, each material projection pressed into the electrode matrix still remaining, however, completely inside the electrode matrix even at the point of its highest elevation. Each material projection is formed as a collar of a plurality of projecting material tabs which are twisted out of their projecting position and are keyed into the compressed electrode matrix.

Growing community of inventors

Munich, Georgia

Willi Kitzhofer