US 12,388,110 B2
Secondary battery and electronic device
Masaaki Hiroki, Kanagawa (JP); and Daisuke Furumatsu, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken (JP)
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
Filed on Apr. 19, 2023, as Appl. No. 18/136,511.
Application 18/136,511 is a continuation of application No. 17/511,170, filed on Oct. 26, 2021, granted, now 11,677,095.
Application 17/511,170 is a continuation of application No. 16/423,904, filed on May 28, 2019, granted, now 11,316,189, issued on Apr. 26, 2022.
Application 16/423,904 is a continuation of application No. 14/509,717, filed on Oct. 8, 2014, granted, now 10,320,025, issued on Jun. 11, 2019.
Claims priority of application No. 2013-219546 (JP), filed on Oct. 22, 2013; application No. 2014-095169 (JP), filed on May 2, 2014; application No. 2014-107474 (JP), filed on May 23, 2014; and application No. 2014-133062 (JP), filed on Jun. 27, 2014.
Prior Publication US 2023/0378514 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/04 (2006.01); H01M 4/70 (2006.01); H01M 50/105 (2021.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/124 (2021.01); H01M 50/133 (2021.01); H01M 50/46 (2021.01); H01M 50/466 (2021.01); H01M 50/533 (2021.01); H01M 50/55 (2021.01); H01M 50/557 (2021.01)
CPC H01M 10/0436 (2013.01) [H01M 4/70 (2013.01); H01M 50/105 (2021.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/124 (2021.01); H01M 50/133 (2021.01); H01M 50/46 (2021.01); H01M 50/466 (2021.01); H01M 50/533 (2021.01); H01M 50/55 (2021.01); H01M 50/557 (2021.01); H01M 2220/30 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A secondary battery comprising:
a positive electrode current collector;
a positive electrode active material layer; and
a film inside which the positive electrode current collector and the positive electrode active material layer are sandwiched,
wherein the film has a pattern including first depressions extending along a first direction and second depressions extending along a second direction intersecting the first direction in both a center portion of the film and an end portion of the film,
wherein the first direction and the second direction are not parallel to an edge in a width direction of the film,
wherein a depth of the first depressions in the center portion is larger than a depth of the first depressions in the end portion,
wherein a depth of the second depressions in the center portion is larger than a depth of the second depressions in the end portion,
wherein the positive electrode current collector comprises a protruding portion, and wherein the protruding portion has a curved shape.