# US 9,520,235 B2 · Clad metal bus bar for film capacitor and film capacitor comprising the same

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- Number: US 9,520,235 B2
- Document ID: US9520235B2
- Status: Granted
- Kind: B2
- Application number: 14/543,691
- Filed: 2014-11-17
- Published: 2015-12-31
- Granted: 2016-12-13
- Earliest claimed: 2014-06-30
- Assignees: Hyundai Mobis Co., Ltd.
- Applicants: Hyundai Mobis Co., Ltd.
- Inventors: Deuk Kyu Hwang; Yong Chun; Kee Yang Lee
- Web page: https://patentgrep.com/patent/US9520235B2

## CPC

- H01G 2/04: specially adapted for mounting on a chassis
- H01G 2/106: {Fixing the capacitor in a housing}
- H01G 4/224: Housing; Encapsulation
- H01G 4/2325: {characterised by the material of the terminals}
- H01G 4/33: Thin- or thick-film capacitors {(thin- or thick-film circuits; capacitors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof, multistep manufacturing processes therefor)}
- H05K 7/02: Arrangements of circuit components or wiring on supporting structure
- H05K 7/14329: {specially adapted for the configuration of power bus bars}
- H01G 4/32: Wound capacitors
- 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)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A clad metal bus bar for a film capacitor may include a clad metal layer including: an aluminum layer; a first copper layer stacked on one surface of the aluminum layer; and a second copper layer stacked on the other surface of the aluminum layer.

## Claims

### Claim 1

A clad metal bus bar for a film capacitor, comprising a clad metal layer comprising:
an aluminum layer;
a first copper layer stacked on one surface of the aluminum layer; and
a second copper layer stacked on the other surface of the aluminum layer,
wherein the thicknesses of the first and second copper layers are set in the range of about 10% to about 25% of the entire thickness of the clad metal layer, and the thickness of the aluminum layer is set in the range of about 50% to about 70% of the entire thickness of the clad metal layer, and
the clad metal layer has a percentage reduction in thickness of less than about 10% and an elongation percentage of about 25% or more, and the bond strength of the clad metal layer, measured on the basis of ISO 11339, is equal to or higher than about 10 kgf or more, based on a specimen width of 25 mm.

### Claim 2 (depends on 1)

The clad metal bus bar of claim 1, wherein the thickness ratio of the first copper layer to the second copper layer is set in the range of about 1:0.5 to about 1:1.5.

### Claim 3 (depends on 1)

The clad metal bus bar of claim 1, wherein the thicknesses of the first and second copper layers are set in the range of about 15% to about 25% of the entire thickness of the clad metal layer, and the cross-sectional thickness of the aluminum layer is set in the range of about 50% to about 65% of the entire thickness of the clad metal layer.

### Claim 4 (depends on 1)

The clad metal bus bar of claim 1, wherein the thickness ratio of the first or second copper layer to the aluminum layer is set in the range of about 1:3 to about 1:8.

### Claim 5 (depends on 1)

The clad metal bus bar of claim 1, wherein the first and second copper layers have a thickness of about 0.05 mm to about 0.5 mm, and the aluminum layer has a thickness of about 0.3 mm to about 2.0 mm.

### Claim 6 (depends on 1)

The clad metal bus bar of claim 1, wherein the clad metal bus bar has a thickness of about 0.5 mm to about 2.5 mm.

### Claim 7 (depends on 1)

The clad metal bus bar of claim 1, wherein the ratio of the percentage reduction in thickness to the elongation percentage of the clad metal layer is set in the range of about 1:2 to about 1:15.

### Claim 8 (depends on 1)

The clad metal bus bar of claim 1, wherein the clad metal bus bar has an electrical conductivity of about 60 IACS % or more.

### Claim 9 (depends on 1)

The clad metal bus bar of claim 1, wherein the clad metal layer has an elongation percentage of about 25% to about 35%.

### Claim 10 (depends on 1)

A film capacitor comprising the clad metal bus bar of claim 1.