	US 12,394,870 B2
	Connecting a cell stack to at least one contact element in a vacuum using a laser
Alexander Breuer, Celle (DE); Dennis Böhm, Wolfenbüttel (DE); Frederik Grau, Braunschweig (DE); and Markus Ramm, Braunschweig (DE)
Assigned to VOLKSWAGEN AKTIENGESELLSCHAFT, Wolfsburg (DE)
Appl. No. 17/800,497
Filed by VOLKSWAGEN AKTIENGESELLSCHAFT, Wolfsburg (DE)
PCT Filed Jan. 29, 2021, PCT No. PCT/EP2021/052090 § 371(c)(1), (2) Date Aug. 17, 2022, PCT Pub. No. WO2021/152080, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 10 2020 102 317.0 (DE), filed on Jan. 30, 2020.
Prior Publication US 2023/0078332 A1, Mar. 16, 2023
Int. Cl. H01M 50/536 (2021.01); B23K 26/26 (2014.01); H01M 10/0525 (2010.01); H01M 10/058 (2010.01)

CPC H01M 50/536 (2021.01) [B23K 26/26 (2013.01); H01M 10/0525 (2013.01); H01M 10/058 (2013.01); H01M 2220/20 (2013.01)]

8 Claims

1. A method for producing a component for storing electrical energy, said component comprising at least one cell stack for storing electrical energy and at least one contact element for making electrical contact with the at least one cell stack, the method comprising the following steps:

a) arranging at least part of the at least one cell stack and the at least one contact element in a defined arrangement relative to one another in or against a chamber that can be evacuated, wherein the chamber is arranged like a bell over an area in which the connection between the at least one cell stack and the at least one contact element is to be made, wherein at least part of the at least one cell stack or of the at least one contact element form one of the chamber walls;

b) evacuating at least some gas in the chamber; and

c) connecting the at least one cell stack and the at least one contact element together to form an electrically conductive connection by means of a laser beam introduced into the chamber.