公开(公告)号：US20240177941A1

公开(公告)日：2024-05-30

申请号：US18502118

申请日：2023-11-06

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YUICHIRO TSUBAKI ,  KENTA CHASHIRO ,  HIROYUKI ARIMA

IPC: H01G9/035 ,  C08K5/053 ,  C08K5/1539 ,  C08K5/45 ,  H01G9/025 ,  H01G9/145 ,  H01G9/15

CPC classification number: H01G9/035 ,  C08K5/053 ,  C08K5/1539 ,  C08K5/45 ,  H01G9/025 ,  H01G9/145 ,  H01G9/15

Abstract: An electrolytic capacitor includes a capacitor element and a liquid component. The capacitor element includes an anode body including a dielectric layer on a surface of the anode body, and a solid electrolyte layer covering at least a part of a surface of the dielectric layer. The solid electrolyte layer contains a conductive polymer component, and the liquid component contains a first polymer component. The first polymer component includes a carbon chain whose main chain does not contain a heteroatom at a position other than a terminal of the main chain. Units constituting the first polymer component include at least one first unit selected from the group consisting of a (meth)acrylic acid-based unit having a carboxy group and a vinyl alcohol-based unit having a hydroxy group. A proportion of the at least one first unit in an entirety of the units constituting the first polymer component is more than 50 mass %.

公开(公告)号：US20220093342A1

公开(公告)日：2022-03-24

申请号：US17540762

申请日：2021-12-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHUMPEI MATSUSHITA ,  TOMOYUKI TASHIRO ,  KENTA CHASHIRO

IPC: H01G9/048 ,  H01G9/08 ,  H01G9/145 ,  H01G9/00

Abstract: An electrolytic capacitor includes a capacitor element, a first current collector, and a case. The capacitor element includes a wound body in which a first electrode foil and a second electrode foil are wound. The first electrode foil and the second electrode foil face each other. The first current collector is connected to the first electrode foil. The case houses the capacitor element and the first current collector. The first electrode foil includes a first facing portion that faces the second electrode foil and a first non-facing portion that does not face the second electrode foil. The first non-facing portion is located at a first end portion in a winding axis of the wound body. The first current collector is disposed in a vicinity of the first end portion of the wound body to be connected to the first non-facing portion of the first electrode foil.

公开(公告)号：US20220359127A1

公开(公告)日：2022-11-10

申请号：US17813940

申请日：2022-07-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TATSUJI AOYAMA ,  YUJI OTSUKA ,  TOMOYUKI TASHIRO ,  KENTA CHASHIRO ,  YUICHIRO TSUBAKI

IPC: H01G9/00 ,  H01G9/025 ,  H01G9/035

Abstract: A method for producing an electrolytic capacitor includes: preparing an anode foil, a cathode foil, and a fibrous structure, the anode foil having a porous portion including a dielectric layer; preparing a conductive polymer-containing liquid, the conductive polymer-containing liquid containing a conductive polymer component and a first solvent;
forming a separator by removing at least a part of the first solvent after applying the conductive polymer-containing liquid to the fibrous structure; forming a capacitor element from the anode foil, the separator, and the cathode foil; and impregnating the capacitor element with an electrolytic solution. An electrical conductivity of the electrolytic solution at 30° C. is 3.0 mS/cm or more.

公开(公告)号：US20220359125A1

公开(公告)日：2022-11-10

申请号：US17815259

申请日：2022-07-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YUICHIRO TSUBAKI ,  KAZUHIRO TAKATANI ,  MIYOKO MASUDA ,  KENTA CHASHIRO ,  SHUMPEI MATSUSHITA

IPC: H01G9/008 ,  H01G9/10 ,  H01G9/055 ,  H01G13/04

Abstract: A method for manufacturing an electrolytic capacitor includes a first connection step, a second connection step, a first insertion step, a housing step, and a sealing step. In the first connection step, a first internal lead having a foil shape is connected to a first electrode foil. In the second connection step, after the first connection step, a first external lead having a rod shape is connected to the first internal lead to obtain the first electrode. In the first insertion step, the first external lead is inserted into an insertion port of a sealing plate after the second connection step. In the housing step, the first electrode is housed in a container after the first insertion step. In the sealing step, an opening of the container is closed with the sealing plate after the housing step.