WELDING METHOD, AND METHOD FOR MANUFACTURING STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To minimize the formation of blow holes in a weld part in welding work.SOLUTION: A welding method for welding the contact part of two members to be welded is carried out to weld in such a state that a part of the end of the contact part communicating with a welding action position is in contact with a low pressure space whose atmospheric pressure is lower than an atmospheric pressure in the welding action position. This welding method is used to weld a casing BC of a storage device placed in a decompressed state from the outside of the casing BC. The formation of bubbles during welding can be suppressed by a suction effect obtained by forming the low pressure space.