US 12,283,652 B2
Battery
Masaharu Senoue, Seto (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Mar. 15, 2024, as Appl. No. 18/606,425.
Application 18/606,425 is a continuation of application No. 17/362,160, filed on Jun. 29, 2021, granted, now 11,961,953.
Claims priority of application No. 2020-116211 (JP), filed on Jul. 6, 2020.
Prior Publication US 2024/0222679 A1, Jul. 4, 2024
Int. Cl. H01M 10/04 (2006.01); H01M 4/13 (2010.01); H01M 50/431 (2021.01); H01M 50/434 (2021.01); H01M 50/449 (2021.01); H01M 4/02 (2006.01)
CPC H01M 10/04 (2013.01) [H01M 4/13 (2013.01); H01M 50/431 (2021.01); H01M 50/434 (2021.01); H01M 50/449 (2021.01); H01M 2004/025 (2013.01); H01M 2004/027 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A lithium-ion battery comprising:
a positive electrode;
a negative electrode;
a separator;
a positive electrode current-collecting member;
a negative electrode current-colleting member; and
an electrolyte solution,
the positive electrode is solid,
the negative electrode is solid,
the negative electrode forming a honeycomb core,
the honeycomb core including a first face, a second face, a partition, and a circumferential wall,
the second face facing away from the first face,
the partition being formed between the first face and the second face,
in a cross section parallel to the first face, the partition extending in a grid pattern to separate a plurality of hollow cells,
in the cross section parallel to the first face, the circumferential wall surrounding a circumference of the partition,
each of the hollow cells penetrating the honeycomb core in a direction from the first face toward the second face,
the separator spatially separating the positive electrode from the negative electrode,
the separator including a first layer and a second layer,
the first layer covering at least part of the partition,
the second layer covering at least part of the first face and at least part of the second face,
the positive electrode including a first region and a second region,
the first region being inserted in the hollow cells,
in a cross section perpendicular to the first face, the second region extending outwardly beyond the second layer of the separator,
the cross section parallel to the first face including a central part and an inner circumferential part,
the inner circumferential part being formed adjacent to the circumferential wall and being formed along the circumferential wall,
the central part being surrounded by the inner circumferential part,
in the central part, the hollow cells having a first average filling factor,
the first average filling factor being an average proportion of a cross-sectional area of the first layer in a cross-sectional area of the hollow cells in the central part,
in the inner circumferential part, the hollow cells having a second average filling factor,
the second average filling factor being an average proportion of a cross-sectional area of the first layer in a cross-sectional area of the hollow cells in the inner circumferential part,
the second average filling factor being 2.1 times or more the first average filling factor,
carrier ions of the lithium-ion battery are lithium ions,
the positive electrode current-collecting member being connected to the positive electrode,
the positive electrode current-collecting member being layered on the first face and/or the second face,
the negative electrode current-collecting member being connected to the negative electrode, and
the negative electrode current-collecting member being layered on the circumferential wall of the honeycomb core.