Battery container with surface treated steel sheet
AssigneeToyo Kohan Co., Ltd.
InventorsHitoshi Ohmura, Tatsuo Tomomori, Hideo Ohmura
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Abstract
A battery container is manufactured by forming, by the DI or DTR forming method, a surface-treated steel sheet obtained by plating the external and internal surfaces of an original steel sheet with a nickel-cobalt alloy. The nickel-cobalt alloy coating the punching load in a cupping process, because the powdering property is remarkably reduced. Therefore, the scratching of a die and a punch caused by metallic contact is suppressed and the service lives of the die and the punch are prolonged, thus providing improved continuous productivity of the battery case which has a good stripping property in the DI or DTR forming operations.
Claims3
A battery container obtained by forming a surface treated steel sheet of which both inside and outside surfaces are plated with nickel-iron alloy, using DI forming method or DTR forming method, wherein the iron content of the said nickel-iron alloy plating is from 0.5 to 5 percent by weight.
A battery container comprising a steel substrate and an electroplated layer on an inner surface thereof and on an outer surface thereof, said electroplated layer consisting of a NiFe alloy, and wherein the iron content of the said nickel-iron alloy electroplated layer is from 0.5 to 5 percent by weight.
Dependencies are inferred from the claim text.