US 12,080,843 B2
Battery cell with multiple separator layers that include adhesive and ceramic material
Mikyong Yoo, Palo Alto, CA (US); and Richard M. Mank, Los Altos, CA (US)
Assigned to APPLE INC., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Feb. 28, 2018, as Appl. No. 15/907,762.
Claims priority of provisional application 62/587,300, filed on Nov. 16, 2017.
Prior Publication US 2019/0148692 A1, May 16, 2019
Int. Cl. H01M 10/0525 (2010.01); H01M 4/04 (2006.01); H01M 50/403 (2021.01); H01M 50/414 (2021.01); H01M 50/434 (2021.01); H01M 50/449 (2021.01); H01M 50/46 (2021.01)
CPC H01M 10/0525 (2013.01) [H01M 4/0404 (2013.01); H01M 50/403 (2021.01); H01M 50/414 (2021.01); H01M 50/434 (2021.01); H01M 50/449 (2021.01); H01M 50/461 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A battery cell comprising:
a first current collector;
a cathode active material disposed along the first current collector;
a second current collector;
an anode active material disposed on the second current collector, wherein the anode active material includes a first end coupled to a first portion of the second current collector and a second end coupled to a second portion of the second current collector; and
a separator disposed between the cathode active material and the anode active material, wherein the separator comprises:
a first separator layer adjacent the anode active material, wherein:
the first separator layer comprises a ceramic material;
the first separator layer extends laterally beyond the first end of the anode active material to contact the first portion of the second current collector about a periphery of the anode active material; and
the second portion of the second current collector is free from contact with the first separator layer; and
a second separator layer adjacent the cathode active material, wherein:
the second separator layer comprises an adhesive material discontinuously patterned across the first separator layer; and
the second separator layer includes an end terminally aligned with the second end of the anode active material.