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Welding process for Al/Cu electrodes

Référence

05200-01

Mots-clés

Current collector

Statut des brevets

French priority patent application n°FR1260984 filed in November 19, 2012 and  entitled ” Soudage hétérogène Aluminium Cuivre »

Inventeurs

Alexandre BENOIT
Donald SCHLEICH
Pascal PAILLARD
Thierry BAUDIN

Statut commercial

Exclusive or non-exclusive license

Laboratoire

Institut des Matériaux Jean Rouxel (IMN, UMR6502) in Nantes, France

Description

CONTEXT

When realizing battery pack, it is important to have mechanical contacts between current collectors. Welding of thin copper and aluminum electrode isn’t possible due to the large difference between their respective melting point (around 600°C).

TECHNICAL DESCRIPTION

The invention relates to a specific welding process (called MIG CMT) allowing the welding between two thin plates of copper and aluminum.

In the above figure, we can see the welding with (from left to right), aluminum electrode, welding zone and copper electrode

DEVELOPMENT STAGE
Over 30 tests were done with good reproductibility without specific optimization of the process. Analysis demonstrates the welding between Al/Cu.

In addition, preliminary tests demonstrate a good resistance to vibrations and a normal use of the welded cells.
Future development are ongoing for welding the electrode in end to end relation.

INDUSTRIAL APPLICATIONS
Pack manufacturing

For further information, please contact us (Ref 05200-01)

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