Methods for welding components of battery modules

A method of high speed welding a plurality of cell terminals to a plurality of tabs of one or more busbar components, using a laser welding system comprising a welding laser arranged to emit a laser beam for welding, and a scanning head comprising a plurality of movable mirrors arranged to direct the laser beam, the method comprising:

• positioning each of the plurality of tabs in contact with one or more of the plurality of cell terminals;
• positioning the scanning head at a first position relative to the plurality of tabs;
• welding a first group of tabs to respective terminals by moving the plurality of movable mirrors to sequentially direct the laser beam of the laser welding system towards each of the tabs in the first group, to produce a first group of welds, wherein the scanning head is held at the first position during production of the first group of welds;
• positioning the scanning head at a second position relative to the tabs;
• and
• welding a second group of tabs to respective terminals by moving the plurality of movable mirrors to sequentially direct the laser beam of the laser welding system towards each of the tabs in the second group, to produce a second group of welds, wherein the scanning head is held at the second position during production of the second group of welds.