Tab material of flexible-packaging lithium battery as well as electroplating method and application method thereof

The invention discloses a tab material of a flexible-packaging lithium battery as well as an electroplating method and an application method thereof, wherein the tab material and the application method thereof are suitable for preparing an anode tab and a cathode tab of the flexible-packaging lithium battery and welding a circuit board. For the tab material, an SUS430 stainless steel band, a copper band, an aluminum band, a nickel band and other conduction materials as the substrate, a nickel-plated layer is firstly plated at one side end of the substrate, and then a tin-plated layer is plated on the nickel-plate layer (the tin-plated layer is directly plated on the nickel band), so as to obtain the tab material with lower production cost, good weldability and appropriate thermal conductivity. For the application method, at the position of the tab material double layers of nickel and tin, laser heating is carried out on one side of the position without being plated, and the tab material is heated to the tin m