Abstract:
Methods for Welding Components of Battery Modules The present invention relates to a method of welding a tab to a terminal using a laser welding system (200). The laser welding system comprises a single-mode infra-red laser. The method comprises placing the tab (402) in contact with the terminal (100P) of the cell, and welding the tab to the terminal by controlling the laser beam to produce a weld path (404) having a predetermined shape. During welding, the system is configured to control the beam to oscillate elliptically about a centreline of the predetermined shape, wherein the oscillations comprise a first component in a direction tangential parallel to the weld path and a second component in a direction normal to the weld path. Advantageously, this results in an efficient and reliable method of welding tabs to cell terminals, especially when welding several tabs connected to a busbar component to respective cell terminals.
Abstract:
A method for making a joint between copper or copper alloys and austenitic steel alloys, in which method in between the junction surfaces of the objects to be joined together, there is arranged at least one intermediate layer, so that the junction surfaces in cluding their intermediate layers are pressed together, and at least the junction area is heated in order to create a diffusion joint. In the method, there is brought a first intermediate layer (3) on the junction surface of the steel object (2) or against said surface, mainly in order to prevent the nickel loss from the steel object (2), and at least a second intermediate layer (4) on the junction surface of the copper object (1) or against said surface in order to activate the creation of a diffusion joint.
Abstract:
A system and method of welding stainless steel to copper is provided. The method includes providing a first workpiece (WP1) composed of stainless steel and provid- ing a second workpiece (WP2) composed of copper. The method also includes heating by using a laser (110; 110') a root area of a joint created by the workpieces. The heating by the laser creates a keyhole in at least one of the first workpiece and the second workpiece. The method also includes providing a consumable electrode (140; 140') that is composed of nickel to the joint and creating an arc (112) between the consumable electrode and the joint using a welding current. The preheating of the arc using the keyhole eliminates the need to preheat the second workpiece.
Abstract:
A method for joining a highly electroconductive core part (2) to a jacket part of refined steel (1). In the method a highly electroconductive core part (2), such as a copper bar, and connection component (3) are placed inside a jacket (1) having poorer electroconductivity, and are heat treated at least where the join of the pieces to be connected is located, in such a way that a metallurgical bond is formed between the electroconductive core part (2) and the refined steel jacket.
Abstract:
Ein Verfahren zum Laserschweißen eines Werkstücks (17), wobei ein Laserstrahl (8) mittels einer Scanneroptik (13) auf das Werkstück (17) gerichtet wird, wobei mit dem Laserstrahl (8) in beliebiger Reihenfolge zumindest in einer ersten Schweißzone (31) eine erste Komponente (21) an ein Grundbauteil (20) geschweißt wird und in einer zweiten Schweißzone (32) eine zweite Komponente (22) an das Grundbauteil (20) geschweißt wird, und wobei die erste Komponente (21) und die zweite Komponente (22) zumindest im Bereich der ersten und zweiten Schweißzone (21, 22) aus unterschiedlichen Materialien bestehen, ist dadurch gekennzeichnet, dass eine Laserenergie des Laserstrahls (8) zumindest zwischen einem Kernanteil (KA), entsprechend einem Kernstrahl (9) des Laserstrahls, und einem Ringanteil, entsprechend einem Ringstrahl (10), der den Kernstrahl (9) umgibt, veränderlich aufteilbar ist, und dass die Aufteilung der Laserenergie auf den Kernanteil (KA) und den Ringanteil beim Schweißen der ersten Schweißzone (21) und beim Schweißen der zweiten Schweißzone (22) unterschiedlich gewählt wird. Mit der Erfindung kann die Fertigung von Werkstücken, wobei Komponenten aus unterschiedlichen Materialien auf ein Grundbauteil aufgeschweißt werden, beschleunigt werden.
Abstract:
A method for brazing an electrically conducting connecting piece, for example a cable shoe, of an electrically conducting material to a workpiece of electrically conducting material, by means of a temperature controlled brazing process in which the heat necessary for brazing is generated by striking an electric arc between a carbon electrode, and the electrically 5 conducting connecting piece, where the voltage and current is electronically controlled by control electronics to achieve a temperature development to result in a martensite free brazing, and wherein the DC voltage applied is using the carbon electrode as the negative pole, and using the electrically conducting connecting piece as the positive pole, and 0 wherein the carbon electrode is having a tapering, bevelled, or pointy end at the end facing the electric arc.
Abstract:
Disclosed is a new fully pre-alloyed brazing powder material. The pre-alloyed brazing powder contains specified amounts of iron, nickel, manganese silicon, boron and balanced with copper. The pre-alloyed brazing powder material can be mixed with up to 3% by weight of a powdered flux composition, or with a wax, and compacted into preforms to be used as a sinter-brazing material in a sinter-brazing process.