US 12,469,904 B2
Flat secondary battery
Yoshiichi Horikoshi, Kyoto (JP); and Taichi Katsumoto, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed on Mar. 24, 2022, as Appl. No. 17/703,317.
Application 17/703,317 is a continuation of application No. PCT/JP2020/033535, filed on Sep. 4, 2020.
Claims priority of application No. 2019-179466 (JP), filed on Sep. 30, 2019.
Prior Publication US 2022/0216545 A1, Jul. 7, 2022
Int. Cl. H01M 50/109 (2021.01); H01M 50/181 (2021.01)
CPC H01M 50/109 (2021.01) [H01M 50/181 (2021.01)] 10 Claims
OG exemplary drawing
 
1. A flat secondary battery comprising:
an outer package member having a flat and columnar shape, the outer package member including a pair of bottom parts and a sidewall part, the bottom parts being opposed to each other, the sidewall part lying between the bottom parts, wherein a first surface of the sidewall part is a curved surface and a second surface of the sidewall part is a flat plane surface, the flat plane surface having a first side and a second side opposite the first side, wherein when viewed from above, the curved surface intersects the flat plane surface at two points and, on that plane, there is a recess for an electrode terminal;
a battery device contained inside the outer package member and including a positive electrode and a negative electrode;
the electrode terminal, which is provided to be exposed at the sidewall part and coupled to one of the positive electrode and the negative electrode; and
a gasket extending through the flat plane surface, arranged in direct contact with the electrode terminal, arranged in direct contact with the first side of the flat plane surface, and arranged in direct contact with the second side of the flat plane surface.