US 11,715,605 B2
Electrolytic capacitor
Kazuyo Saito, Osaka (JP); Yuichiro Tsubaki, Kyoto (JP); and Tatsuji Aoyama, Kyoto (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Nov. 4, 2021, as Appl. No. 17/518,849.
Application 17/518,849 is a continuation of application No. 16/810,105, filed on Mar. 5, 2020, granted, now 11,195,664.
Application 16/810,105 is a continuation of application No. PCT/JP2018/036209, filed on Sep. 28, 2018.
Claims priority of application No. 2017-191961 (JP), filed on Sep. 29, 2017.
Prior Publication US 2022/0059292 A1, Feb. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01G 9/035 (2006.01); H01G 9/028 (2006.01); H01G 9/145 (2006.01); H01G 9/15 (2006.01); H01G 9/042 (2006.01)
CPC H01G 9/035 (2013.01) [H01G 9/028 (2013.01); H01G 9/145 (2013.01); H01G 9/151 (2013.01); H01G 9/042 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electrolytic capacitor comprising:
a capacitor element; and
an electrolytic solution, wherein:
the capacitor element includes an anode body with an oxide film and a solid electrolyte in contact with the oxide film,
the electrolytic solution contains a solvent and a solute,
the solvent contains at least one selected from a group consisting of a lactone compound, a glycol compound, and a sulfone compound,
the solute includes a first acid component and a base component, the first acid component including at least one of a benzenedicarboxylic acid and a derivative of the benzenedicarboxylic acid, the base component including at least one of an amine and an amidine,
a concentration of the solute in the electrolytic solution ranges from 15% by mass to 40% by mass, inclusive, and
a ratio V/Vw of a formation voltage V of the oxide film to a rated voltage Vw of the electrolytic capacitor is more than or equal to 1.5 and less than or equal to 1.7.