US 12,394,801 B2
Collector foil and method for producing a collector foil
Bjoern-Ingo Hieronymus Hogg, Munich (DE); and Katja Tenhaeff, Munich (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/417,540
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Dec. 10, 2019, PCT No. PCT/EP2019/084351
§ 371(c)(1), (2) Date Jun. 23, 2021,
PCT Pub. No. WO2020/143971, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. 10 2019 100 476.4 (DE), filed on Jan. 10, 2019.
Prior Publication US 2022/0059847 A1, Feb. 24, 2022
Int. Cl. H01M 4/70 (2006.01); H01M 4/04 (2006.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/70 (2013.01) [H01M 4/0435 (2013.01); H01M 4/667 (2013.01); H01M 10/0525 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A collector foil comprising:
a base material comprising at least one coating region on at least one side of the base material, wherein:
an uncoated region of the base material comprises at least one expanding region that is configured to mechanically decouple the at least one coating region from the uncoated region,
the expanding region is formed in a transition region between the at least one coating region and the uncoated region,
the expanding region is in a form of an edge or a strip which runs around an entire periphery of the at least one coating region,
the base material in the expanding region has at least one slit or cut, and
the at least one slit or cut is oriented in a non-parallel direction with respect to a longitudinal sheet direction.