Welding method and welding auxiliary device

The invention relates to the technical field of batteries, and discloses a welding method and a welding auxiliary device which are used for welding a current collecting disc and a cover plate, and the welding method utilizes a supporting assembly to support the current collecting disc. The welding method comprises the following steps: placing the supporting assembly at the top of the battery cell; placing the current collecting plate on one side, deviating from the battery cell, of the supporting assembly; placing a cover plate on one side, deviating from the battery cell, of the current collecting disc; the cover plate is pressed downwards, so that the flow collecting disc is in a flat state under the matching action of the cover plate and the supporting assembly; and welding the collector plate and the cover plate. According to the welding method disclosed by the invention, the gap between the collector plate and the cover plate can be eliminated, the risks of pseudo soldering and weld penetration are avoid