| 摘要 |
PURPOSE:To prevent defective sealing in the laser welding or the like of a container of a battery using an electrolyte containing thionyl chloride by performing welding of the container while cooling the metal-made container by spraying inactive gas. CONSTITUTION:A metal top 11, in which a positive pole terminal 9 made of stainless steel is inserted in advance through a glass seal material 10 while being electrically insulated into the central hole, is arranged above an armored can 1 while connecting the positive pole terminal 9 of the metal top 11 with a collector body 6 of the positive pole collector 3 in the armored can 1 through a lead wire 12. Next, after fitting the metal top 11 to the upper opening part of the armored can 1, the outer periphery of the metal top 11 and the connecting part of the armored can 1 are welded for being sealded by the laser light 13 radiated from the horizontal direction to the rotary center in the argon atmosphere at 20 deg.C while rotating the armored can 1 on the axis of the can center. Thereby, the low temperature argon gas 14 is sprayed on the lower part by 5mm. from the upper part of the armored can 1 through a nozzle for cooling. |
