Nemak, S.a.b. De C.v.

Jan Scheil

Friedrich Bleicher

Udo Kreutzarek

Stefan Heueis

Andreas Müller

Sascha Florian List

Lucjan Czorny

Christoph Lechner

Christoph Viechtbauer

Sven Schüddekopf

Ugis Groza

Richard Franzmann

A battery carrier for receiving at least one battery module serving as a drive energy storage device for an electrically driven vehicle. The battery carrier can be connected to a body of the vehicle, including a substantially circumferential frame structure having longitudinal sides and transverse sides for forming a receiving area for the at least one battery module, wherein the battery carrier is integrally molded from a light metal material, in particular integrally cast from a light metal material. The receiving area encloses an area of at least 0.5 m2, in particular of at least 0.75 m2, particularly preferably of at least 1 m2. The present invention also relates to methods for die casting a substantially one-piece battery carrier from a light metal melt, in particular from an aluminum alloy melt.

One-piece battery carrier and method for die casting a one-piece battery carrier

The invention provides a battery carrier which is provided for being fastened in a floor region of a supporting structure of an electrically driven motor vehicle. The battery carrier with a floor section and a side wall running around the floor section delimits a receiving space for at least one battery element to be positioned there. The side wall includes at least two side wall sections which are aligned at an angle β of more than 0° relative to the floor section and meet in a corner region. In a such a battery carrier, the floor section is formed in one piece from a first aluminum material and side wall sections of the side wall meeting at least in one of the corner regions in each case, including the respective corner region, are formed in one piece from a second aluminum material which has a higher elongation at break A than the first aluminum material. The invention further discloses a method of manufacturing a battery carrier of the type according to the disclosure.

Battery carrier for an electrically driven vehicle and method of manufacturing such a battery carrier

With the method according to the invention, mould parts for casting moulds for light metal casting can be treated such that the danger of crack formation in the region of the surface sections of the mould part coming into contact with the light metal melt during casting is reduced to a minimum. This is achieved in that by means of nitriding treatment on the mould part a nitride-hardened edge layer adjoining its free surface is generated which is harder than the inner core region of the mould part and comprises a diffusion layer adjoining the core region and a compound layer located on the diffusion layer and adjoining the free surface of the mould part and in that at least one section of the surface of the mould part is mechanically processed by machine hammer peening, in the case of which a hammer tool, which, at a certain impact frequency, carries out an impact movement along a movement axis which is aligned in relation to the free surface at a certain acute angle, is guided continuously over the free surface of the mould part following a track determined in a preceding design step such that the compound layer is removed by the impacting stress in the impact region of the hammer tool.

Method of treating the surfaces of mould parts for casting moulds consisting of a steel material

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Darmstradt, Germany

Jan Scheil