Film capacitor and method for manufacturing film capacitor

Patent metadata

Field	Value
Publication number	US-10796852-B2
Application number	US-201815925935-A
Country	US
Kind code	B2
Filing date	Mar 20, 2018
Priority date	Oct 9, 2015
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A film capacitor includes a capacitor unit, and outer packaging resin covering the capacitor unit. The capacitor unit includes a capacitor group, a first bus bar, a second bus bar, and a fixation portion. The capacitor group includes a plurality of capacitor elements. The first bus bar extracts electricity from the capacitor group. The second bus bar extracts electricity from the capacitor group. The first bus bar and the second bus bar are fixed to the fixation portion. The first bus bar includes a connection terminal part formed at one end of the first bus bar, and the second bus bar includes a connection terminal part formed at one end of the second bus bar. At least one of the connection terminal part of the first bus bar and the connection terminal part of the second bus bar is coupled to the fixation portion.

First claim

What is claimed is:

1. A film capacitor comprising:
a capacitor unit; and
an outer packaging resin covering the capacitor unit,
wherein:
the capacitor unit includes:
a capacitor group including a plurality of capacitor elements;
a first bus bar that extracts electricity from the capacitor group;
a second bus bar that extracts electricity from the capacitor group, the second bus bar facing the first bus bar;
a first fixation portion to which the first bus bar is fixed; and
a second fixation portion to which the second bus bar is fixed, the second fixation portion being different from the first fixation portion,

the first bus bar includes a connection terminal part formed at one end of the first bus bar, the second bus bar includes a connection terminal part formed at one end of the second bus bar,
each of the connection terminal part of the first bus bar and the connection terminal part of the second bus bar is exposed from the outer packaging resin to be connected to an external terminal,
the connection terminal part of the first bus bar is coupled to the first fixation portion,
the connection terminal part of the second bus bar is coupled to the second fixation portion, the first fixation portion and the second fixation portion are spaced apart along a direction from the connection terminal part of the first bus bar to the connection terminal part of the second bus bar,
the first bus bar further includes a coupling part formed at the one end of the first bus bar, and the second bus bar further includes a coupling part formed at the one end of the second bus bar,
the first bus bar is connected to an end-face electrode formed on one end face of each of the capacitor elements,
the second bus bar is connected to an end-face electrode formed on another end face of each of the capacitor elements,
the connection terminal part of the first bus bar and the coupling part of the second bus bar are coupled to the first fixation portion, and
the connection terminal part of the second bus bar and the coupling part of the first bus bar are coupled to the second fixation portion.

2. The film capacitor according to claim 1 , wherein
each of the connection terminal part of the first bus bar and the connection terminal part of the second bus bar includes a first terminal part that has a flat plate shape, and a second terminal part that has a flat plate shape and bent with respect to the first terminal part, and
each of the first fixation portion and the second fixation portion has a contact face that is in contact with the first terminal part.

3. The film capacitor according to claim 2 , wherein:
the contact face has a protrusion, and
the first terminal part has a through-hole into which the protrusion is inserted.

4. The film capacitor according to claim 2 , wherein the each of the first fixation portion and the second fixation portion includes two ribs that are formed on both sides of the contact face and extend along sides of the first terminal part.

5. The film capacitor according to claim 2 , wherein the each of the first fixation portion and the second fixation portion has a recess on the contact face, the recess extending in a direction intersecting to a direction in which each of the connection terminal part of the first bus bar and the connection terminal part of the second bus bar is exposed from the outer packaging resin and being positioned higher than a region covered by the outer packaging resin.

6. The film capacitor according to claim 1 , wherein
each of the first fixation portion and the second fixation portion has a cuboid shape.

7. A film capacitor comprising:
a capacitor unit; and
an outer packaging resin covering the capacitor unit,
wherein:
the capacitor unit includes:
a capacitor group including a plurality of capacitor elements;
a first bus bar that extracts electricity from the capacitor group;
a second bus bar that extracts electricity from the capacitor group, the second bus bar facing the first bus bar;
a first fixation portion to which the first bus bar is fixed; and
a second fixation portion to which the second bus bar is fixed, the second fixation portion being different from the first fixation portion,

the first bus bar includes a connection terminal part formed at one end of the first bus bar, the second bus bar includes a connection terminal part formed at one end of the second bus bar,
each of the connection terminal part of the first bus bar and the connection terminal part of the second bus bar is exposed from the outer packaging resin to be connected to an external terminal,
the connection terminal part of the first bus bar is coupled to the first fixation portion,
the connection terminal part of the second bus bar is coupled to the second fixation portion,
the first fixation portion and the second fixation portion are spaced apart along a direction from the connection terminal part of the first bus bar to the connection terminal part of the second bus bar,
each of the connection terminal part of the first bus bar and the connection terminal part of the second bus bar includes a first terminal part that has a flat plate shape, and a second terminal part that has a flat plate shape and bent with respect to the first terminal part,
each of the first fixation portion and the second fixation portion has a contact face that is in contact with the first terminal part, and
the each of the first fixation portion and the second fixation portion includes two ribs that are formed on both sides of the contact face and extend along sides of the first terminal part.

8. The film capacitor according to claim 7 , wherein:
the contact face has a protrusion, and
the first terminal part has a through-hole into which the protrusion is inserted.

9. The film capacitor according to claim 7 , wherein the each of the first fixation portion and the second fixation portion has a recess on the contact face, the recess extending in a direction intersecting to a direction in which each of the connection terminal part of the first bus bar and the connection terminal part of the second bus bar is exposed from the outer packaging resin and being positioned higher than a region covered by the outer packaging resin.

10. A film capacitor comprising:
a capacitor unit; and
an outer packaging resin covering the capacitor unit, wherein:
the capacitor unit includes:
a capacitor group including a plurality of capacitor elements;
a first bus bar that extracts electricity from the capacitor group;

a second bus bar that extracts electricity from the capacitor group, the second bus bar facing the first bus bar;
a first fixation portion to which the first bus bar is fixed; and
a second fixation portion to which the second bus bar is fixed, the second fixation portion being different from the first fixation portion,

the capacitor group includes a first capacitor group and a second capacitor group,
the first bus bar includes a first pair of bus bars, one of the first pair of bus bars is connected to an end-face electrode formed on one end face of each of capacitor elements of the first capacitor group and another of the first pair of bus bars is connected to an end-face electrode formed on another end face of each of the capacitor elements of the first capacitor group,
the second bus bar includes a second pair of bus bars, one of the second pair of bus bars is connected to an end-face electrode formed on one end face of each of capacitor elements of the second capacitor group and another of the second pair of bus bars is connected to an end-face electrode formed on another end face of each of the capacitor elements of the second capacitor group,
the one of the first

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kadomura Manato
• Fujii Eizo

Classifications

• H01G4/18

  of synthetic material, e.g. derivatives of cellulose (H01G4/16 takes precedence) · CPC title

• H01G2/04

  specially adapted for mounting on a chassis · CPC title

• H01G13/00

  Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00 · CPC title

• H01G4/38

  Multiple capacitors, i.e. structural combinations of fixed capacitors · CPC title

• H02G5/02

  Open installations · CPC title