US 12,272,829 B2
Battery
Kazutoshi Kohira, Hyogo (JP); Keisuke Naito, Osaka (JP); Shinya Geshi, Osaka (JP); Hiroshi Takasaki, Osaka (JP); and Kazumichi Shimizu, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/298,412
Filed by PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
PCT Filed Nov. 29, 2019, PCT No. PCT/JP2019/046918
§ 371(c)(1), (2) Date May 28, 2021,
PCT Pub. No. WO2020/111275, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 2018-225881 (JP), filed on Nov. 30, 2018; application No. 2018-225882 (JP), filed on Nov. 30, 2018; application No. 2018-225883 (JP), filed on Nov. 30, 2018; and application No. 2018-225885 (JP), filed on Nov. 30, 2018.
Prior Publication US 2022/0123395 A1, Apr. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 50/107 (2021.01); H01M 50/147 (2021.01); H01M 50/152 (2021.01); H01M 50/184 (2021.01); H01M 50/186 (2021.01); H01M 50/593 (2021.01); H01M 6/02 (2006.01); H01M 10/02 (2006.01)
CPC H01M 50/107 (2021.01) [H01M 50/147 (2021.01); H01M 50/152 (2021.01); H01M 50/184 (2021.01); H01M 50/186 (2021.01); H01M 50/593 (2021.01); H01M 6/02 (2013.01); H01M 10/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A battery comprising:
a battery can that includes a cylinder portion and a bottom portion, the cylinder portion having an opening edge portion at one of end portions of the cylinder portion, the other one of the end portions of the cylinder portion being closed by the bottom portion;
an electrode body that is housed in the cylinder portion; and
a sealing member that is fixed to the cylinder portion to seal an opening of the opening edge portion,
wherein the sealing member includes: a sealing plate; a cap that has a through hole corresponding to the sealing plate and is connected to the sealing plate while being electrically insulated from the sealing plate; and a sealing portion that seals a space between the cylinder portion and the cap,
with a direction in which the two end portions of the cylinder portion face each other being defined as an axial direction,
the cap includes: a ring-shaped top plate portion that is disposed to oppose the opening edge portion in the axial direction and lies along a circumferential edge of the sealing plate; and a side wall portion that extends from a circumferential edge of the top plate portion toward the bottom portion and covers an outer circumferential surface of the cylinder portion,
the battery can is electrically connected to one of electrodes included in the electrode body,
the sealing plate is electrically connected to the other one of the electrodes included in the electrode body,
the cap is electrically connected to the cylinder portion,
the sealing portion includes a first gasket that seals a space between the opening edge portion and the cap,
the first gasket is provided between the opening edge portion and the top plate portion, is in contact with the top plate portion, and covers an inner circumferential surface of the cylinder portion at the opening edge portion,
the opening edge portion is pressed in the axial direction by the first gasket,
the sealing member further includes a second gasket that seals a space between the sealing plate and the cap,
the second gasket is provided spaced apart from a fifth gasket,
the cap includes a supporting portion that extends to stand from the top plate portion toward the bottom portion in the axial direction on an inner circumferential side of the top plate portion relative to a position of the side wall portion,
the second gasket is provided between an inner circumferential surface of the supporting portion and at least an outer circumferential edge portion of the sealing plate, and
the first gasket is provided in an outer circumferential region that is located on an outer circumferential side of the supporting portion and includes an outer circumferential end portion of the top plate portion.