# US 11,908,622 B2 · Capacitor

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- Number: US 11,908,622 B2
- Document ID: US11908622B2
- Status: Granted
- Kind: B2
- Application number: 17/373,581
- Filed: 2021-07-12
- Published: 2021-11-04
- Granted: 2024-02-20
- Earliest claimed: 2019-02-05
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Motohiro Kawahata; Eiji Koba
- Web page: https://patentgrep.com/patent/US11908622B2

## CPC

- H01G 2/04: specially adapted for mounting on a chassis
- H01F 27/06: Mounting, supporting, or suspending transformers, reactors, or choke coils {not being of the signal type}
- H01F 27/24: Magnetic cores
- H01F 27/28: Coils; Windings; Conductive connections
- H01F 27/30: Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01G 2/08: Cooling arrangements; Heating arrangements; Ventilating arrangements
- H01G 4/224: Housing; Encapsulation
- H01G 4/228: Terminals
- H01G 4/38: Multiple capacitors, i.e. structural combinations of fixed capacitors
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Capacitor includes a capacitor element unit and a case that is made of a metal and houses the capacitor element unit. The capacitor element unit includes a capacitor element, a first bus bar and a second bus bar that are connected to the capacitor element, and an insulating member disposed between the first bus bar and the second bus bar. The insulating member includes a first mounting portion, and the case includes a second mounting portion to which the first mounting portion is attached so that the capacitor element unit is located at a predetermined position with respect to the case while the first bus bar and the second bus bar are not in contact with the case.

## Claims

### Claim 1

A capacitor comprising:
a capacitor element unit; and
a case that is made of a metal and houses the capacitor element unit,
the capacitor element unit including:
a capacitor element;
a first electrode disposed on one of both end faces of the capacitor element;
a second electrode disposed on another one of the both end faces of the capacitor element;
a first bus bar connected to the first electrode, the first bus bar including a first region;
a second bus bar connected to the second electrode, the second bus bar including a second region facing the first region; and
a first insulating member that has an insulation property and is disposed between the first region and the second region, wherein:
the first insulating member includes a first mounting portion,
the case includes a second mounting portion to which the first mounting portion is attached so that the capacitor element unit is located at a predetermined position with respect to the case while the first bus bar and the second bus bar are not in contact with the case,
the capacitor element is disposed in the case so that the second electrode faces an inner bottom surface of the case,
the second bus bar includes an electrode connection portion connected to the second electrode, the electrode connection portion being disposed between the second electrode and the inner bottom surface of the case,
the first mounting portion is attached to the second mounting portion so that the electrode connection portion is not in contact with the inner bottom surface of the case,
the second mounting portion has a mounting surface that is parallel to the inner bottom surface of the case,
the first mounting portion has a mounting surface that is in contact with the mounting surface of the second mounting portion, and
a distance between the mounting surface of the second mounting portion and the inner bottom surface of the case is greater than a distance between the mounting surface of the first mounting portion and a surface of the electrode connection portion, the surface of the electrode connection portion facing the inner bottom surface of the case.

### Claim 2 (depends on 1)

The capacitor according to claim 1, further comprising a second insulating member disposed between the electrode connection portion and the inner bottom surface of the case, the second insulating member having an insulation property.

### Claim 3 (depends on 1)

The capacitor according to claim 1, wherein the first mounting portion is attached to the second mounting portion with a screw.

### Claim 4 (depends on 1)

The capacitor according to claim 1, wherein:
one of the first mounting portion and the second mounting portion has a protrusion,
another one of the first mounting portion and the second mounting portion has a hole, and
the first mounting portion is attached to the second mounting portion by fitting the protrusion to the hole.

### Claim 5

A capacitor comprising:
a capacitor element unit; and
a case that is made of a metal and houses the capacitor element unit,
the capacitor element unit including:
a capacitor element;
a first electrode disposed on one of both end faces of the capacitor element;
a second electrode disposed on another one of the both end faces of the capacitor element;
a first bus bar connected to the first electrode, the first bus bar including a first region;
a second bus bar connected to the second electrode, the second bus bar including a second region facing the first region; and
a first insulating member that has an insulation property and is disposed between the first region and the second region, wherein:
the first insulating member includes a first mounting portion,
the case includes a second mounting portion to which the first mounting portion is attached so that the capacitor element unit is located at a predetermined position with respect to the case while the first bus bar and the second bus bar are not in contact with the case, and
the first mounting portion is attached to the second mounting portion with a screw.

### Claim 6 (depends on 5)

The capacitor according to claim 5, wherein:
the capacitor element is disposed in the case so that the second electrode faces an inner bottom surface of the case,
the second bus bar includes an electrode connection portion connected to the second electrode, the electrode connection portion being disposed between the second electrode and the inner bottom surface of the case, and
the first mounting portion is attached to the second mounting portion so that the electrode connection portion is not in contact with the inner bottom surface of the case.

### Claim 7 (depends on 6)

The capacitor according to claim 6, wherein:
the second mounting portion has a mounting surface that is parallel to the inner bottom surface of the case,
the first mounting portion has a mounting surface that is in contact with the mounting surface of the second mounting portion, and
a distance between the mounting surface of the second mounting portion and the inner bottom surface of the case is greater than a distance between the mounting surface of the first mounting portion and a surface of the electrode connection portion, the surface of the electrode connection portion facing the inner bottom surface of the case.

### Claim 8 (depends on 6)

The capacitor according to claim 6, further comprising a second insulating member disposed between the electrode connection portion and the inner bottom surface of the case, the second insulating member having an insulation property.

### Claim 9 (depends on 5)

The capacitor according to claim 5, wherein:
one of the first mounting portion and the second mounting portion has a protrusion,
another one of the first mounting portion and the second mounting portion has a hole, and
the first mounting portion is attached to the second mounting portion by fitting the protrusion to the hole.

### Claim 10

A capacitor comprising:
a capacitor element unit; and
a case that is made of a metal and houses the capacitor element unit,
the capacitor element unit including:
a capacitor element;
a first electrode disposed on one of both end faces of the capacitor element;
a second electrode disposed on another one of the both end faces of the capacitor element;
a first bus bar connected to the first electrode, the first bus bar including a first region;
a second bus bar connected to the second electrode, the second bus bar including a second region facing the first region; and
a first insulating member that has an insulation property and is disposed between the first region and the second region, wherein:
the first insulating member includes a first mounting portion,
the case includes a second mounting portion to which the first mounting portion of the first insulating member is attached so that the capacitor element unit is located at a predetermined position with respect to the case while the first bus bar and the second bus bar are not in contact with the case,
the case has an opening and an inner bottom surface facing the opening,
a part of the first bus bar and a part of the second bus bar are led out from the opening to an outside of the case,
the second mounting portion has a mounting surface that is parallel to the inner bottom surface of the case, and
the first mounting portion has a mounting surface that is in contact with the mounting surface of the second mounting portion.

### Claim 11 (depends on 10)

The capacitor according to claim 10, wherein:
the capacitor element is disposed in the case so that the second electrode faces the inner bottom surface of the case,
the second bus bar includes an electrode connection portion connected to the second electrode, the electrode connection portion being disposed between the second electrode and the inner bottom surface of the case, and
the first mounting portion is attached to the second mounting portion so that the electrode connection portion is not in contact with the inner bottom surface of the case.

### Claim 12 (depends on 11)

The capacitor according to claim 11, further comprising a second insulating member disposed between the electrode connection portion and the inner bottom surface of the case, the second insulating member having an insulation property.

### Claim 13 (depends on 10)

The capacitor according to claim 10, wherein the first mounting portion is attached to the second mounting portion with a screw.

### Claim 14 (depends on 10)

The capacitor according to claim 10, wherein:
one of the first mounting portion and the second mounting portion has a protrusion,
another one of the first mounting portion and the second mounting portion has a hole, and
the first mounting portion is attached to the second mounting portion by fitting the protrusion to the hole.