US 12,255,026 B2
Electrolytic capacitor
Yuji Miyachi, Saga Ken (JP); and Takayuki Matsumoto, Saga Ken (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/914,234
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Mar. 25, 2021, PCT No. PCT/JP2021/012711
§ 371(c)(1), (2) Date Sep. 23, 2022,
PCT Pub. No. WO2021/193866, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-058655 (JP), filed on Mar. 27, 2020; and application No. 2020-058659 (JP), filed on Mar. 27, 2020.
Prior Publication US 2023/0113070 A1, Apr. 13, 2023
Int. Cl. H01G 9/012 (2006.01); H01G 9/052 (2006.01)
CPC H01G 9/012 (2013.01) [H01G 9/052 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electrolytic capacitor comprising:
a capacitor element;
an anode lead terminal and a cathode lead terminal that are electrically connected to the capacitor element;
a conductive member; and
an exterior resin disposed around the capacitor element,
wherein the capacitor element includes an anode body that is a porous sintered body having a dielectric layer formed on a surface thereof, an anode wire projecting from an end face of the anode body, and a cathode part disposed adjacent to the dielectric layer,
the cathode part has first and second side surfaces, and a bottom surface and a top surface that join the first and second side surfaces,
the cathode lead terminal includes a connection part that is connected to the cathode part via the conductive member,
the connection part includes a plate-shaped part facing one surface selected from the bottom surface and the top surface with the conductive member interposed between the plate-shaped part and the one surface, and first and second side walls standing from the plate-shaped part and respectively facing the first and second side surfaces,
a plurality of grooves are formed in a surface, located on the cathode part side, of each of the plate-shaped part and the first and second side walls,
the plurality of grooves include a plurality of first grooves formed so as to extend continuously from the plate-shaped part across the first side wall, and a plurality of second grooves formed so as to extend continuously from the plate-shaped part across the second side wall,
the conductive member is disposed between the one surface and the plate-shaped part, between the first side surface and the first side wall, and between the second side surface and the second side wall, and
of the plurality of grooves, grooves that are formed in the first and second side walls are each formed so as to be away from the end face in a direction away from the plate-shaped part.