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AssigneesDeutsche Automobilgesellschaft mbH, Daug-Hoppecke Gesellschaft fuer Batteriesystems mbH
InventorsOtwin Imhof, Wilhelm Kitzhofer
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An electrode plate is formed from a porous electrode framework with welded-on current discharge lug for use in electrochemical storage cells. The electrode framework is formed from metallized plastic and has a current discharge lug welded on in a unilateral and overlapping manner on the weld-on edge of the electrode framework. The material thickness of the current discharge lug decreases in the weld-on end towards the weld-on edge. The material of the electrode framework assigned to the weld-on end of the current discharge lug is compressed in the region of the overlap. For greater stability of the welding, the weld-on end of the current discharge lug is formed by teeth spaced apart from one another by teeth interspaces. The teeth interspaces are at least wide enough that, when there is pressing during the welding on of the current discharge lug, the material of the electrode framework can swell between the teeth.
An electrode plate comprising a porous electrode framework with welded-on current discharge lug for use in electrochemical storage cells, the current discharge lug being welded on in an overlapping manner at a weld-on edge of the electrode framework, a weld-on end thereof being provided exclusively on only one flat side of the electrode framework, the current discharge lug having a material thickness decreasing in the weld-on end towards a lower edge thereof, and the electrode framework being compressed in a region of the overlapping with the weld-on end of the current discharge lug, wherein the weld-on end of the current discharge lug comprises teeth spaced apart from one another by teeth interspaces, the teeth interspaces being at least wide enough to receive swelling material of the electrode framework during pressing on the current discharge lug.
A process for the production of an electrode plate having a porous electrode framework from metallized plastic, with a current discharge lug welded on in an overlapping manner on a weld-on edge of the electrode framework for use in electrochemical storage cells, in which material thickness of the current discharge lug in the weld-on end is made to decrease towards the weld-on edge, comprising the steps of punching teeth from a weld-on end of the current discharge lug to define teeth interspaces, placing and securing the current discharge lug with the weld-on end exclusively on only one flat side of the electrode plate in a positionally defined manner over the assigned weld-on edge of the electrode plate, pressing the weld-on end into the weld-on edge, welding-on the weld-on edge of the electrode framework, and permanently compressing transversely to a flat side thereof the material of the electrode framework assigned to the weld-on end of the current discharge lug in a region of the overlapping during welding of respective edges and, during welding, the material of the electrode framework is pressed into the teeth interspaces and is also welded onto flanks of the teeth interspaces.
Dependencies are inferred from the claim text.