| 摘要 |
PURPOSE:To increae with certainty the weld strength between each electrode and its corresponding current collector in a battery equipped with rolled electrodes, by causing each current collector to contact with the edge of its corresponding rolled electrode which edge is protruding, arranging a pair of welding electrodes on the collector with a predetermined interval therebetween, and passing a current between the electrodes to weld the collector to the edge. CONSTITUTION:Beltlike positive and negative electrodes are rolled with a separator interposed therebetween while causing their edges to protrude respectively upwards and downwards. Then, a platelike positive electrode current collector 5 is brought into contact with the protruded part 1 of the core metal of the positive electrode. On the collector 5, a pair of welding electrodes 8, 8' are arranged with a clearance L which is 5mm. or shorter. Then, a welding current is applied across the welding electrodes 8, 8', whereby heating and fusing the collector 5 between the welding electrodes 8, 8' to weld the collector 5 to the electrode edge. This welding is suitably performed at several locations. Then, the negative electrode collector 6 is also welded to the protruded edge 3 of the metal core of the negative electrode. It is preferable to weld the positive and negative electrode plats with their respctive collectors, each made of a metallic piece having no opening and being not thicker than 0.5mm., by means of an A.C. welding machine. |
