US 12,340,941 B2
Power storage device, battery management unit, and electronic device
Junya Goto, Kanagawa (JP); Ai Nakagawa, Kanagawa (JP); and Yuika Sato, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken (JP)
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
Filed on Aug. 24, 2023, as Appl. No. 18/237,584.
Application 16/890,049 is a division of application No. 15/215,621, filed on Jul. 21, 2016, granted, now 10,686,167, issued on Jun. 16, 2020.
Application 18/237,584 is a continuation of application No. 17/840,658, filed on Jun. 15, 2022, granted, now 11,742,155.
Application 17/840,658 is a continuation of application No. 16/890,049, filed on Jun. 2, 2020, granted, now 11,380,951, issued on Jul. 5, 2022.
Claims priority of application No. 2015-152444 (JP), filed on Jul. 31, 2015.
Prior Publication US 2024/0087820 A1, Mar. 14, 2024
Int. Cl. H01M 50/119 (2021.01); H01G 11/78 (2013.01); H01G 11/80 (2013.01); H01G 11/82 (2013.01); H01M 50/133 (2021.01); H01M 10/0525 (2010.01); H01M 10/42 (2006.01)
CPC H01G 11/78 (2013.01) [H01G 11/80 (2013.01); H01G 11/82 (2013.01); H01M 50/119 (2021.01); H01M 50/133 (2021.01); H01M 10/0525 (2013.01); H01M 10/425 (2013.01); H01M 2010/4271 (2013.01); Y02E 60/13 (2013.01); Y02T 10/70 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A power storage device comprising:
a film;
a positive electrode; and
a negative electrode,
the film comprising:
a first projection and a second projection whose top portions are on a first surface; and
a third projection and a fourth projection whose top portions are on a second surface which is the other surface of the first surface,
wherein the first projection comprises a region adjacent to the third projection,
wherein the second projection comprises a region adjacent to the fourth projection,
wherein each depth of the first projection, the second projection, the third projection, and the fourth projection are larger than or equal to 0.15 mm and smaller than 0.8 mm,
wherein the depth of the first projection is larger than the depth of the second projection,
wherein the depth of the third projection is larger than the depth of the fourth projection,
wherein the film comprises a metal layer,
wherein a thickness of the metal layer is greater than or equal to 5 μm and less than or equal to 200 μm,
wherein the first projection and the third projection are arranged in a first region of the film, and the second projection and the fourth projection are arranged in a second region of the film, and
wherein the first region is curved, and the second region is flat.