Double Head synchronous ultrasonic metal welding device according to the invention is provided in the second set of intermediate frame 18 comprise the ultrasonic welding , and the middle frame 18 is composed of assembly flanges 19 and the other two parallel sliding stop rod 11 , the assembling flange 19 is the driving device (3) are connected with each . Drive device (3) is a synchronous drive the ultrasonic welding mechanism to be able to move to face each other by the synchronous welding . Allows welding device according to the invention can be welded on both sides at the same time by the multi-layer metal pieces are spot welded and roll welding power battery , and also improve the working efficiency , with one single welding allows the welding layer to be stronger . ;
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