| 摘要 |
PROBLEM TO BE SOLVED: To provide a current collector terminal for a secondary battery, which can suppress the temperature rise of the tip of a convex part to over a required temperature in welding and which can be bonded to an edge part of an electrode body with a sufficient welding strength.SOLUTION: A current collector terminal 30 for a secondary battery is to be welded to an edge part 21E of an electrode body 20. The current collector terminal comprises: a flat plate part 31 having a front face 31A and a rear face 31B; and a welding protruding part 33A having a linearly extending shape and formed by shaping the flat plate part to partially protrude. The welding protruding part has a shape protruding toward the flat plate part so that a front face side shows a convex and a rear face side shows a concave. Viewing a sectional shape from a direction orthogonal to an extending direction of the welding protruding part, the surface geometry of a first region 34 in the welding protruding part, which is located on the front face side makes a curved surface, and that of a second region 35 located on the rear face side opposite to the first region 34 in the welding protruding part is a plane.SELECTED DRAWING: Figure 12 |
