US 12,176,485 B2
Secondary battery
Yumiko Yoneda, Kanagawa (JP); Masaki Yamakaji, Kanagawa (JP); Ryota Tajima, Kanagawa (JP); and Masaaki Hiroki, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
Filed on Dec. 26, 2023, as Appl. No. 18/395,852.
Application 18/395,852 is a continuation of application No. 17/468,766, filed on Sep. 8, 2021, granted, now 11,888,113.
Application 17/468,766 is a continuation of application No. 15/818,814, filed on Nov. 21, 2017, granted, now 11,121,405, issued on Sep. 14, 2021.
Application 15/818,814 is a continuation of application No. 14/854,349, filed on Sep. 15, 2015, granted, now 9,843,073, issued on Dec. 12, 2017.
Claims priority of application No. 2014-190900 (JP), filed on Sep. 19, 2014.
Prior Publication US 2024/0356067 A1, Oct. 24, 2024
Int. Cl. H01M 10/0565 (2010.01); H01M 4/02 (2006.01); H01M 4/13 (2010.01); H01M 10/04 (2006.01); H01M 10/052 (2010.01); H01M 10/0585 (2010.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/122 (2021.01); H01M 50/124 (2021.01)
CPC H01M 10/0565 (2013.01) [H01M 4/02 (2013.01); H01M 4/13 (2013.01); H01M 10/0436 (2013.01); H01M 10/052 (2013.01); H01M 10/0585 (2013.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/122 (2021.01); H01M 50/124 (2021.01); H01M 2300/0085 (2013.01); Y02T 10/70 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A secondary battery comprising:
a first positive electrode current collector:
a first negative electrode current collector:
a second negative electrode current collector; and
a second positive electrode current collector,
wherein the first positive electrode current collector, the first negative electrode current collector, the second negative electrode current collector, and the second positive electrode current collector overlap one another,
wherein the first positive electrode current collector comprises a first surface and a second surface opposite to the first surface,
wherein the first negative electrode current collector comprises a third surface and a fourth surface opposite to the third surface,
wherein the second negative electrode current collector comprises a fifth surface and a sixth surface opposite to the fifth surface,
wherein the second positive electrode current collector comprises a seventh surface and an eighth surface opposite to the seventh surface,
wherein the third surface faces the second surface,
wherein the fourth surface faces the fifth surface,
wherein the sixth surface faces the seventh surface,
wherein each of the first surface and the second surface is covered with a positive electrode active material layer,
wherein the third surface is covered with a negative electrode active material layer while the fourth surface is exposed,
wherein the sixth surface is covered with a negative electrode active material layer while the fifth surface is exposed, and
wherein each of the seventh surface and the eighth surface is covered with a positive electrode active material layer,
wherein the secondary battery is configured to be curved, and
wherein a static friction coefficient between the fourth surface and the fifth surface is less than or equal to 0.80.
 
8. A secondary battery comprising:
a first negative electrode current collector:
a first positive electrode current collector:
a second positive electrode current collector; and
a second negative electrode current collector,
wherein the first positive electrode current collector, the first negative electrode current collector, the second negative electrode current collector, and the second positive electrode current collector overlap one another,
wherein the first negative electrode current collector comprises a first surface and a second surface opposite to the first surface,
wherein the first positive electrode current collector comprises a third surface and a fourth surface opposite to the third surface,
wherein the second positive electrode current collector comprises a fifth surface and a sixth surface opposite to the fifth surface,
wherein the second negative electrode current collector comprises a seventh surface and an eighth surface opposite to the seventh surface,
wherein the third surface faces the second surface,
wherein the fourth surface faces the fifth surface,
wherein the sixth surface faces the seventh surface,
wherein each of the first surface and the second surface is covered with a negative electrode active material layer,
wherein the third surface is covered with a positive electrode active material layer while the fourth surface is exposed,
wherein the sixth surface is covered with a positive electrode active material layer while the fifth surface is exposed, and
wherein each of the seventh surface and the eighth surface is covered with a negative electrode active material layer,
wherein the secondary battery is configured to be curved, and
wherein a static friction coefficient between the fourth surface and the fifth surface is less than or equal to 0.80.