Abstract: Disclosed is a cold-rolled strip, at least one face of which is provided with an electrolytically applied coating, preferably to be used for producing battery shells by means of deep drawing and/or ironing. The electrolytically applied coating comprises two layers, i.e. a hard and brittle bright nickel layer and a cobalt-containing layer that is applied thereupon. The aim of the invention is to be able to produce such a cold-rolled strip in a more economic manner while a battery shell produced by reshaping said cold-rolled strip is to have good contact resistance to the electrolyte and good storage stability. Said aim is achieved by using a matte cobalt layer which is removed from an electrolyte bath without adding brighteners, or a matte cobalt alloy layer as the cobalt-containing layer. Also disclosed are a method for electrolytically coating a cold-rolled strip and a battery shell which is produced from such a cold-rolled strip by means of a reshaping process.

Abstract: A battery sheath made of formed and cold-rolled sheet metal as well as a process for manufacturing the battery sheath are proposed. In the process, cold-rolled strip stock is provided on at least one side with a coating of Ni, Co, Fe, Sn, In, Pd, Bi or their alloys in an electroplating bath, e.g., a Watts-type bath. As an additional component, the electroplating bath contains electrically conductive particles such as carbon, carbon black, graphite, TiS2, TaS2, MoSi2. These particles are deposited on the base material during electroplating together with Ni, Co, Fe, Sn, In, Pd, Bi or their alloys. The sheet metal side with, for example, the carbon-containing electroplated coating faces preferably inwardly when the sheet is formed into a battery sheath. Batteries with battery sheaths produced in this manner exhibit reduced increase in internal resistance, even with prolonged storage, as compared to known batteries.