# US 2018/0026252 A1 · Welded metal component and battery including the same

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- Number: US 2018/0026252 A1
- Document ID: US20180026252A1
- Status: Published application
- Kind: A1
- Application number: 15/642,866
- Filed: 2017-07-06
- Published: 2018-01-25
- Earliest claimed: 2016-07-21
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: SEIJI KUMAZAWA; TAKAYUKI ASHIDA; SHINYA MORI; HIROAKI TAKANO
- Web page: https://patentgrep.com/patent/US20180026252A1

## CPC

- C22C 9/01: with aluminium as the next major constituent
- B23K 9/232: {of different metals}
- B23K 11/20: of different metals
- B23K 26/244: Overlap seam welding
- B23K 26/282: of tube sections
- B23K 26/323: involving parts made of dissimilar metallic material
- B23K 35/0255: {for use in welding (B23K35/0205 takes precedence)}
- B23K 35/286: {Al as the principal constituent}
- B23K 35/302: {Cu as the principal constituent}
- B32B 15/017: {one layer being formed of aluminium or an aluminium alloy, another layer being formed of an alloy based on a non ferrous metal other than aluminium}
- H01M 50/507: comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
- H01M 50/516: by welding, soldering or brazing
- H01M 50/522: Inorganic material
- B23K 2101/36: Electric or electronic devices
- B23K 2103/18: Dissimilar materials
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A welded metal component, includes: a first component; a second component that is stacked on the first component and that is made of a material different from the first component; and at least one welded part that passes through the second component so as to reach the first component, wherein a proportion of an intermetallic compound present in the at least one welded part is from 15% to 60%, and the intermetallic compound includes a metal element that constitutes the first component, and a metal element that constitutes the second component. Further disclosed is a battery comprising the above welded metal component, wherein the second component serves as a bus bar, and the first component serves as an electrode for the battery.

## Claims

### Claim 1

A welded metal component, comprising:
a first component;
a second component that is stacked on the first component and that is made of a material different from the first component; and
at least one welded part that passes through the second component to reach the first component, wherein
a proportion of an intermetallic compound present in the at least one welded part is from 15% to 60%, and the intermetallic compound includes a metal element that constitutes the first component, and a metal element that constitutes the second component.

### Claim 2 (depends on 1)

The welded metal component according to claim 1, wherein the proportion is from 25% to 45%.

### Claim 3 (depends on 1)

The welded metal component according to claim 1, wherein the intermetallic compound is scattered over the at least one welded part.

### Claim 4 (depends on 1)

The welded metal component according to claim 1, wherein the proportion is a proportion of an area of a compositional region, including the intermetallic compound, to an area of the at least one welded part.

### Claim 5 (depends on 1)

The welded metal component according to claim 1, wherein the at least one welded part on a surface of the second component is ring-shaped in plan view.

### Claim 6 (depends on 1)

The welded metal component according to claim 1, wherein the at least one welded part includes at least two welded parts each including a linear part in plan view.

### Claim 7 (depends on 1)

The welded metal component according to claim 1, wherein the first component is made of copper, and the second component is made of aluminum.

### Claim 8 (depends on 1)

The welded metal component according to claim 1, wherein those having an intermetallic-compound composition falling within a range from ±10% to ±6% of the compositional proportion of the intermetallic compound is regarded as the intermetallic compound.

### Claim 9 (depends on 1)

A battery comprising the welded metal component according to claim 1, wherein the second component serves as a bus bar, and the first component serves as an electrode for the battery.