Volkswagen Ag

Powerco Se

Kartik Jamadar

Christian Theuerkauf

Frederik Grau

Priyanka Gangurde

Bastian Westphal

Sven Schopf

A method for producing a cell stack () for battery cells () comprises at least the following steps: a) feeding in at least a first material strip () comprising a first material; b) making a first cut into at least the first material strip (), thereby forming at least one strip-like transport section () having tensile strength; c) combining the first material strip () with at least a second material strip () comprising a second material, in order to form a partial stack (); d) attaching the partial stack () thus formed at a first attachment site by means of a first movable clamping apparatus (); e) replenishing at least one material strip () and attaching the partial stack () thus formed at a second attachment site by means of a second movable clamping apparatus; f) making a second cut of the attached partial stack (), whereby the transport section () is cut off; g) opening the clamping apparatuses (); and h) arranging at least two partial stacks () to form a cell stack ().

Method and device for producing a cell stack for battery cells

A method for producing a cell stack for battery cells comprises at least the following steps: feeding in at least a first material strip consisting of a first material; making a first cut into at least the first material strip while forming at least one transport section having tensile strength; combining the first material strip with at least a second material strip consisting of a second material, so as to form a partial stack; making a second cut of the partial stack, whereby the transport section is cut open; and arranging at least two partial stacks so as to form a cell stack.

Method and apparatus for manufacturing a cell stack for battery cells

A method for cutting electrode foils and a device for cutting electrode foils that are intended for use in a battery cell are proposed. The cutting device comprises a cutting tool, a vibration device for exciting at least the cutting tool to vibration, and a particle feed line for feeding at least particles. The cutting tool can be arranged above the electrode foil with a separation from a surface of the electrode foil, and the electrode foil can be cut at least as a result of the vibrations of the cutting tool that are transmitted to at least one particle.

Method and device for cutting electrode foils

A method for cutting electrode foils () by means of a particle stream () is proposed. A cutting device () for cutting electrode foils () that are intended for use in a battery cell is also specified which comprises at least one nozzle () with an outlet (), one cutting tool (), one vibration device () for exciting at least the cutting tool () to vibration (), one particle feed line () for supplying at least particles (), and one gas feed line () for supplying a first gas stream (), wherein the particles () and the first gas stream () can be mixed in the cutting device () to form a particle stream () and fed via the nozzle () to the outlet (), wherein the cutting tool () and the outlet () can be arranged above the electrode foil () with separation () from a surface () of the electrode foil (), and wherein the electrode foil () can be cut at least as a result of the particle stream () and the vibrations () of the cutting tool ().

A method for forming a metal composite film for battery cells includes at least the following steps: (a) inserting the metal composite film into a forming apparatus having a recess; (b) fixing the metal composite film in place by closing a film holder; (c) preforming the metal composite film within the recess in a first direction; and (d) final forming of the metal composite film within the recess in a second direction.

Method for forming metal composite films for battery cells

A device and method for producing a thin-walled component, in particular a housing film for a pouch cell, from an initial part, comprising a first coil body, an electrical circuit for providing a pulsed electrical current, a die with a support facing the first coil body for the initial part to be reshaped, the support having the shape of the component to be produced, and a first separating device by which a first partial area can be at least partially separated from a second partial area of the initial part, it being possible for the initial part to be arranged between the first coil body and the die, to be accelerated by an electromagnetic force acting between the first coil body and the initial part towards the die and thereby to be deformed by the support and to be at least partially separated by the first separating device.

Device and method for producing a thin-walled component

A method for connecting a pre-sealing tape to a composite metal foil for pouch cells comprises at least the following steps: (a) creating a texture in at least a partial area of the composite metal foil; (b) applying a pre-sealing tape onto the composite metal foil, whereby the texture is at least partially covered by the pre-sealing tape; (c) connecting the pre-sealing tape to the composite metal foil to form a composite body; and (d) cutting the composite body to the predefined finished contour.

Method and device for connecting composite metal foils for pouch cells with a pre-sealing tape

A process for coating a carrier material with an active material for production of an electrode foil of a battery cell with a Laval nozzle, wherein the Laval nozzle has at least one converging first portion, one second portion having a smallest flow cross section, and one diverging third portion arranged one after the other along a flow direction.

Process for coating a carrier material with an active material for the production of an electrode foil of a battery cell

A method for producing a battery cell includes at least the following steps: a) reshaping a first pouch foil into a first pouch half by means of a first molding device with a first recess; b) reshaping a second pouch foil into a second pouch foil by means of a second molding device with a second recess; c) inserting a cell stack into the first molding device and the first pouch half located therein; d) bringing together the first molding device and the second molding device with the second pouch half located therein; and e) at least partially connecting the first and second pouch halves to form a battery cell.

Method and device for the production of metal composite foils for battery cells

A method for processing an electrode sheet, wherein the electrode sheet has a carrier layer and an electrode material that is applied to the carrier layer only in a material region of the electrode sheet, so that a free region, which is free of electrode material, remains for the formation of diverters, wherein the electrode sheet is guided in a conveying direction by a processing device, so that the material region and the free region (run side by side, wherein the processing device has a calender through which the electrode sheet is guided and with which the material region is calendered, wherein the processing device additionally has at least one roller that is designed in such a way that it exerts a transverse tensile stress on the electrode sheet. A corresponding processing device is also specified.

Growing community of inventors

Wolfsburg, Germany

Kartik Jamadar