Schuler Pressen Gmbh

Ball Europe Gmbh

Mall + Herlan Gmbh

Bernd Ullmann

Rainer Berkefeld

Matthias Braun

Torsten Becker

A forming tool and a forming method for producing an overpressure predetermined breaking point in a battery cover by deformation. The forming tool has a stamping tool and a die tool and an optional hold-down arrangement. On the die tool a support surface is provided for the battery cover to be deformed to form a forming cavity in the die tool in a depressed manner. On the stamping tool a stamp part and a ring-shaped stamp part is provided corresponding to a bead to be created in the battery cover in the cross-section. During deformation of the battery cover the stamping tool is pressed in the battery cover, whereby material of the battery cover flows into the forming cavity. Thereby the stamping tool is approached to the forming cavity in a manner such that the remaining distance corresponds to a minimum wall thickness at the overpressure predetermined breaking point.

Forming tool and forming method for producing an overpressure predetermined breaking point in a battery cover

A battery cell housing includes a housing shell and a housing cover. A bearing surface and a first connecting surface separate thereto are present on the housing shell () on at least two mutually facing side walls or on all side. A contact surface on the housing cover is associated with each bearing surface and a second connecting surface on the housing cover is associated with the first connecting surface. The relative position of the second connecting surface and of the contact surface is adapted to the relative position of the bearing surface and of the first connecting surface. The contact surface and the second connecting surface can thus be spaced apart in the vertical direction (H) and/or the second connecting surface is present on an edge side strip extending downwards in the vertical direction (H) to a bottom of the housing shell.

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Pfinztal, Germany

Bernd Ullmann