The present invention disclosure relates to a method of welding a tab to a terminal of an electrical cell using an infra-red laser welding system. A first surface of the tab is placed in contact with the terminal of the electrical cell, and an infra-red laser is directed through at least one lens towards a second surface of the tab opposite the first surface. The laser welding system is controlled to produce a weld by directing the beam to follow a predetermined path. During welding, the beam is focussed in a plane between the first surface and the lens. In some embodiments, the beam may be focussed between the second surface and the lens. Advantageously, focussing the beam in this way has been found to reduce undesirable phenomena such as spatter and to produce more reliable welds than prior art methods.


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    Title :

    METHODS FOR WELDING COMPONENTS OF BATTERY MODULES


    Contributors:
    AL-BADANI MO (author) / BAILEY OLIVER (author) / HANEY PAUL (author)

    Publication date :

    2024-05-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B23K Löten , SOLDERING OR UNSOLDERING



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