# US 2014/0194015 A1 · Method for improving the transition resistance in an electrical connection between two contact elements and component having an electrical connection between two contact elements

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- Number: US 2014/0194015 A1
- Document ID: US20140194015A1
- Status: Published application
- Kind: A1
- Application number: 14/237,741
- Filed: 2012-08-06
- Published: 2014-07-10
- Earliest claimed: 2011-08-08
- Assignees: Tyco Electronics AMP GmbH
- Inventors: Helge Schmidt; Uwe Bluemmel
- Web page: https://patentgrep.com/patent/US20140194015A1

## CPC

- H01R 4/18: by crimping {(H01R4/01, H01R4/2495 take precedence; for coaxial cables H01R9/0518)}
- B23K 1/206: {Cleaning}
- H01H 1/5866: {characterised by the use of a plug and socket connector}
- H01R 4/183: {for cylindrical elongated bodies, e.g. cables having circular cross-section (H01R4/01 takes precedence)}
- H01R 43/048: Crimping apparatus or processes (H01R43/042 takes precedence)
- B23K 2101/38: Conductors
- Y10T 29/49185: of terminal
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- 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
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention relates to a method for improving the transition resistance in an electrical connection, in particular a pressure connection, between two contact elements. With repeated mechanical or thermal loads, such connections, in particular connections having a small cross-section or comprising soft material, have a transition resistance which increases over time. According to the invention, the transition resistance is improved by there being applied to at least one contact face of a contact element a chemically reducing substance which activates the contact face and consequently increases the conductivity and the cold welding density.

## Claims

### Claim at position 1

1-10. (canceled)

### Claim 11

A method for producing an electrical connection by means of plastic deformation between at least one contact face of a first contact element, and the contact face of a second contact element, wherein a chemically reducing substance is applied to at least one of the contact faces.

### Claim 12 (depends on 11)

A method according to claim 11, wherein the chemically reducing substance is an acid.

### Claim 13 (depends on 12)

A method according to claim 12, wherein the acid is an organic acid.

### Claim 14 (depends on 11)

A method according to claim 11, wherein the chemically reducing substance is a fluxing agent.

### Claim 15 (depends on 11)

A method according to claim 11, wherein the substance is encapsulated in submillimetre or submicrometre balls which are at least partially broken open in the plastically deformed state of one contact face.

### Claim 16 (depends on 11)

A method according to claim 11, wherein the first contact element is a wire or a strand.

### Claim 17

A component which contains at least two contact elements each having at least one contact face, respectively, at least one contact element having been plastically deformed, wherein a chemically reducing substance is present at least on a portion of a contact element.

### Claim 18 (depends on 17)

An electrical component according to claim 17, wherein the chemically reducing substance is an acid.

### Claim 19 (depends on 17)

An electrical component according to claim 17, wherein the chemically reducing substance is an organic acid.

### Claim 20 (depends on 17)

An electrical component according to claim 17, wherein the chemically reducing substance is a fluxing agent.

### Claim 21 (depends on 17)

An electrical component according to claim 17, wherein there are embedded in the chemically reducing substance submillimetre or submicrometre balls which break open under pressure.