Electrolytic capacitor and seat plate

Patent metadata

Field	Value
Publication number	US-11664170-B2
Application number	US-202016735518-A
Country	US
Kind code	B2
Filing date	Jan 6, 2020
Priority date	Jan 31, 2019
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

An electrolytic capacitor includes a capacitor main body. The capacitor main body includes an exterior member and a pair of lead members. The exterior member includes a case and a closing part. The case has a hollow column shape. The case includes an opening part at an end in an axial direction of the hollow column shape. The closing part closes the opening part. The pair of lead members each include a drawn part exposed from the closing part. The drawn part has a bar shape. When viewed in the axial direction, a width of the drawn part is 0.1 times or more of a diameter of the exterior member.

First claim

What is claimed is:

1. An electrolytic capacitor comprising:
a capacitor main body; and
a seat plate attached to the capacitor main body, wherein:
the capacitor main body including:
an exterior member including a case and a closing part, the case having a hollow column shape and including an opening part at an end in an axial direction of the hollow column shape, the closing part closing the opening part, and
a pair of lead members each including a drawn part exposed from the closing part, the drawn part having a bar shape,

when viewed in the axial direction, a width of the drawn part is 0.1 times or more of a diameter of the exterior member,
the pair of lead members each further include an extended part connected to the drawn part, the extended part having a thickness smaller than the width of the drawn part,
when viewed in the axial direction, a center of the extended part in a thickness direction is located at a position that is away from a center of the drawn part and is closer to a center of the case than the center of the drawn part is,
the seat plate has a pair of through holes respectively allowing the pair of lead members to pass through, and
when viewed in the axial direction, a distance between the pair of through holes is equal to or shorter than a radius of a virtual circle, the virtual circle having a center identical to the center of the drawn part and a diameter having same length as the width of the extended part.

2. The electrolytic capacitor according to claim 1 , wherein a width of the extended part is two times or more of the width of the drawn part.

3. The electrolytic capacitor according to claim 1 , wherein:
the seat plate includes a partition wall including a part of an inner surface of each of the pair of through holes and being located between the pair of through holes, and
when viewed in the axial direction, the virtual circle partially overlaps with the partition wall.

4. The electrolytic capacitor according to claim 1 , wherein:
the extended part includes a portion passing through a corresponding one of the pair of through holes, and
in a cross section taken along a plane perpendicular to the axial direction, an opening area of each of the pair of through holes is three times or more of a cross sectional area of the drawn part.

5. The electrolytic capacitor according to claim 1 , wherein:
the seat plate includes a partition wall including a part of an inner surface of each of the pair of through holes and being located between the pair of through holes, and
a first distance is shorter than a second distance, the first distance being a distance between the partition wall and the center of the drawn part in an alignment direction in which the pair of through holes are aligned, the second distance being a distance between the inner surface of a corresponding one of the pair of through holes and the center of the drawn part in a direction orthogonal to the alignment direction when viewed in the axial direction.

6. The electrolytic capacitor according to claim 1 , wherein:
the seat plate includes a partition wall including a part of an inner surface of each of the pair of through holes and being located between the pair of through holes, and
the partition wall includes a flat surface having a planar shape, the flat surface being provided as a part of the inner surface of one of the pair of through holes.

7. The electrolytic capacitor according to claim 1 , wherein:
the seat plate includes a rotation regulation structure, the rotation regulation structure being provided in a region facing a corresponding one of the pair of lead members to regulate the capacitor main body from rotating.

8. The electrolytic capacitor according to claim 1 , wherein a length of the case in the axial direction is 1.4 times or more of a diameter of the case.

9. A seat plate provided to an electrolytic capacitor, the electrolytic capacitor including a capacitor main body, the capacitor main body including:
an exterior member including a case and a closing part, the case having a hollow column shape and including an opening part at an end in an axial direction of the hollow column shape, the closing part closing the opening part, and
a pair of lead members each including a drawn part exposed from the closing part, the drawn part having a bar shape, wherein:
when viewed in the axial direction, a width of the drawn part is 0.1 times or more of a diameter of the exterior member,
the pair of lead members further each include an extended part connected to the drawn part, the extended part having a thickness smaller than the width of the drawn part,
when viewed in the axial direction, a center of the extended part in a thickness direction is located at a position that is away from a center of the drawn part and is closer to a center of the case than the center of the drawn part is,
the seat plate has a pair of through holes respectively allowing the pair of lead members to pass through, and
when viewed in the axial direction, a distance between the pair of through holes is equal to or shorter than a radius of a virtual circle, the virtual circle having a center identical to the center of the drawn part and a diameter having same length as the width of the extended part.

10. The seat plate according to claim 9 , further comprising a partition wall including a part of an inner surface of each of the pair of through holes and being located between the pair of through holes, and
the seat plate is attached to the capacitor main body so that, when viewed in the axial direction, the virtual circle partially overlaps with the partition wall.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Koyanagi kentaro

Classifications

• H01G9/10

  Sealing, e.g. of lead-in wires · CPC title

• H01G9/008

  Terminals · CPC title

• H01G9/08 Primary

  Housing; Encapsulation · CPC title

• H01G9/151

  with wound foil electrodes · CPC title

• H01G9/145

  Liquid electrolytic capacitors (H01G11/00 takes precedence) · CPC title