BATTERY, PREPARATION METHOD THEREOF AND ELECTRIC DEVICE

The present disclosure provides a battery, a preparation method thereof and an electric device. The battery includes a housing and an accommodated battery cell including electrode sheets and electrode tabs, where the electrode sheet includes a current collector, and the current collector is coated with an active material layer, the current collector includes a coating area coated with the active material layer and an empty foil area not coated with the active material layer, one end of the electrode tab is overlapped with the empty foil area, and the electrode tab and the electrode sheet are formed into an integral structure by laser welding; a surface of the empty foil area facing away from the electrode tab has a plurality of spiral weld marks arranged at intervals; and a surface of the electrode tab facing away from the empty foil area has no weld marks.