BATTERY MANUFACTURING
A method of manufacturing a battery is provided. A cathode assembly is provided, including a cathode and a cathode tab. The cathode tab is welded to a positive terminal of the battery. The welding is made in a circular movement.
1 . A method of manufacturing a battery, the method comprising:
providing a battery housing including a housing body and a portion defining a positive battery terminal;
providing an electrode assembly comprising a cathode and a cathode tab configured to allow the cathode to be connected to the positive battery terminal; and
welding together the cathode tab and the positive battery terminal, said welding being made in a circular movement.
2 . The method of claim 1 wherein the circular movement is repeated multiple times about the same diameter.
3 . The method of claim 1 wherein said welding is made in multiple circular movements each having different diameters.
4 . The method of claim 1 wherein said welding is made in a first circular movement having a first diameter and a second circular movement having a second diameter different from the first diameter.
5 . The method of claim 4 wherein the first circular movement is repeated multiple times about the first diameter before moving to the second circular movement.
6 . The method of claim 1 wherein welding comprises laser welding.
7 . The method of claim 6 wherein the laser beam comprises a fiber laser.
8 . The method of claim 7 wherein the laser beam emitted from the fiber laser has a diameter between 5 and 50 microns.
9 . The method of claim 1 wherein the cathode tab has a thickness between 0.05 mm and 0.2 mm.
10 . The method of claim 1 wherein the positive battery terminal has a thickness between 0.2 mm and 0.5 mm.
11 . The method of claim 1 wherein the circular welding movement is a made at a diameter between 100 and 1000 microns.
12 . The method of claim 1 wherein the cathode tab comprises aluminum.
13 . The method of claim 1 wherein the positive battery terminal comprises aluminum.