US 12,347,891 B2
Button cell comprising a direction determining member
Daeseop Lim, Yongin-si (KR); Ha-Dong Kim, Yongin-si (KR); Hyo-Bin Bang, Yongin-si (KR); and Yoojin Song, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Aug. 24, 2023, as Appl. No. 18/455,461.
Application 18/455,461 is a continuation of application No. 17/111,817, filed on Dec. 4, 2020, granted, now 11,784,379.
Claims priority of application No. 10-2020-0044714 (KR), filed on Apr. 13, 2020.
Prior Publication US 2023/0411809 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 50/559 (2021.01); H01M 50/109 (2021.01); H01M 50/531 (2021.01); H01M 50/593 (2021.01); H01M 50/597 (2021.01)
CPC H01M 50/559 (2021.01) [H01M 50/109 (2021.01); H01M 50/531 (2021.01); H01M 50/593 (2021.01); H01M 50/597 (2021.01); H01M 2200/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A button cell comprising:
a case accommodating an electrode assembly and having an opening;
a cap plate coupled to the case to cover the opening and having a terminal hole;
a terminal plate coupled to the cap plate to cover the terminal hole;
a direction determining member covering the cap plate and coupled to the case to define an extended part; and
an insulating member between the electrode assembly and the cap plate and having a through hole corresponding to the terminal hole,
wherein a diameter of the through hole is smaller than a diameter of the terminal hole, and
wherein the direction determining member comprises:
a plane portion covering a portion of the cap plate; and
a side portion extending from the plane portion along a side of the case so as to be in direct contact with the side of the case.
 
18. A button cell comprising:
a case accommodating an electrode assembly and having an opening;
a cap plate coupled to the case to cover the opening and having a terminal hole;
a terminal plate coupled to the cap plate to cover the terminal hole;
a direction determining member covering the cap plate and coupled to the case to define an extended part; and
an insulating member between the electrode assembly and the cap plate and having a through hole corresponding to the terminal hole,
wherein a diameter of the through hole is smaller than a diameter of the terminal hole,
wherein the electrode assembly comprises a first electrode, a second electrode, and a separator therebetween,
the case is connected to the first electrode via a first electrode tab, and
the terminal plate is connected to the second electrode via a second electrode tab,
wherein the terminal plate comprises:
a flange part outside the cap plate and electrically insulated from and attached to an outer surface of the cap plate; and
a tab connection portion protruded inside from the flange part to be inserted into the terminal hole of the cap plate and electrically connected to the second electrode tab via an inner surface of the terminal plate,
wherein, based on a bottom of the case, the outer surface of the cap plate is covered by the flange part, and a remaining exposed surface of the cap plate defines a plane surface,
wherein the direction determining member comprises:
a plane portion comprising a through hole corresponding to the flange part so as to cover the exposed surface of the cap plate while exposing the flange part; and
a side portion extending along a side of the case outside the plane portion so as to cover and be coupled to a part of the side of the case, and
wherein, based on the bottom of the case, a height of the plane portion is equal to or less than a height of the flange part.