	US 12,134,259 B2
	Laminated multilayer membranes, separators, batteries, and methods
Xiaomin Zhang, Charlotte, NC (US); Eric Robert White, Fort Mill, SC (US); Kang Karen Xiao, Mississauga (CA); Robert A Nark, Charlotte, NC (US); Insik Jeon, Tega Cay, SC (US); Kristoffer K. Stokes, Lunenburg, MA (US); Paul Vido, Rock Hill, SC (US); and Zhengming Zhang, Rock Hill, SC (US)
Assigned to Celgard, LLC, Charlotte, NC (US)
Filed by Celgard, LLC, Charlotte, NC (US)
Filed on Aug. 23, 2021, as Appl. No. 17/409,363.
Application 17/409,363 is a division of application No. 16/505,502, filed on Jul. 8, 2019, granted, now 11,101,525.
Application 16/505,502 is a division of application No. 15/223,032, filed on Jul. 29, 2016, granted, now 10,347,890, issued on Jul. 9, 2019.
Claims priority of provisional application 62/199,385, filed on Jul. 31, 2015.
Prior Publication US 2021/0384587 A1, Dec. 9, 2021
Int. Cl. H01M 50/449 (2021.01); B32B 3/26 (2006.01); B32B 5/16 (2006.01); B32B 27/32 (2006.01); H01M 10/42 (2006.01); H01M 50/403 (2021.01); H01M 50/406 (2021.01); H01M 50/411 (2021.01); H01M 50/417 (2021.01); H01M 50/431 (2021.01); H01M 50/434 (2021.01); H01M 50/44 (2021.01); H01M 50/446 (2021.01); H01M 50/457 (2021.01); H01M 50/491 (2021.01); H01M 50/494 (2021.01); H01M 50/581 (2021.01); B29K 105/04 (2006.01); B32B 38/00 (2006.01); H01M 10/052 (2010.01)

CPC B32B 5/16 (2013.01) [B32B 3/26 (2013.01); B32B 27/32 (2013.01); H01M 10/4235 (2013.01); H01M 50/406 (2021.01); H01M 50/417 (2021.01); H01M 50/434 (2021.01); H01M 50/44 (2021.01); H01M 50/446 (2021.01); H01M 50/449 (2021.01); H01M 50/457 (2021.01); H01M 50/491 (2021.01); H01M 50/494 (2021.01); H01M 50/581 (2021.01); B29K 2105/041 (2013.01); B32B 2038/0028 (2013.01); B32B 2250/03 (2013.01); B32B 2255/10 (2013.01); B32B 2255/20 (2013.01); B32B 2255/26 (2013.01); B32B 2264/00 (2013.01); B32B 2270/00 (2013.01); B32B 2305/026 (2013.01); B32B 2307/30 (2013.01); B32B 2307/50 (2013.01); B32B 2307/516 (2013.01); B32B 2307/54 (2013.01); B32B 2307/582 (2013.01); B32B 2307/5825 (2013.01); B32B 2307/732 (2013.01); B32B 2457/10 (2013.01); H01M 10/052 (2013.01); H01M 2200/10 (2013.01)]

16 Claims

1. A dry process membrane comprising:

two exterior layers each comprising polyethylene; and

at least one interior layer that comprises polypropylene, wherein the membrane may be formed by at least one of lamination or co-extrusion,

wherein the membrane has a pin removal compared force which is at least 15% less than the pin removal force of a known membrane having an assigned pin removal force of 0%,

wherein the at least one inner layer has a pore size that is half of or less than half of a pore size of at least one of the two exterior layers, and

wherein a coating is applied to one or both of the two exterior layers.