US 12,126,032 B2
Method for forming metal composite films for battery cells
Frederik Grau, Braunschweig (DE); Kartik Jamadar, Wolfsburg (DE); and Christian Theuerkauf, Braunschweig (DE)
Assigned to VOLKSWAGEN AKTIENGESELLSCHAFT, Wolfsburg (DE)
Filed by VOLKSWAGEN AKTIENGESELLSCHAFT, Wolfsburg (DE)
Filed on Jan. 15, 2021, as Appl. No. 17/150,459.
Claims priority of application No. 10 2020 101 088.5 (DE), filed on Jan. 17, 2020.
Prior Publication US 2021/0226282 A1, Jul. 22, 2021
Int. Cl. B21D 26/14 (2006.01); H01M 50/102 (2021.01); H01M 50/119 (2021.01); H01M 50/124 (2021.01)
CPC H01M 50/102 (2021.01) [B21D 26/14 (2013.01); H01M 50/119 (2021.01); H01M 50/124 (2021.01); H01M 2220/20 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for forming a metal composite film for battery cells,
comprising at least the following steps:
a) inserting the metal composite film into a forming apparatus having a first section and a second section that together define a recess, wherein a part of the recess defines a final form, and wherein on at least one side of the recess is mounted an electrical coil configured to emit an electromagnetic pulse;
b) fixing the metal composite film in place within the recess by closing a film holder;
c) using at least a first electromagnetic pulse, preforming the metal composite film within the recess in a first direction; and
d) using at least a second electromagnetic pulse, final forming of the metal composite film within the recess in a second direction that is selected to be opposite to the first direction.