| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery that can prevent a laser beam and/or spatter from entering the inside of an electrode assembly and thereby causing problems inside the electrode plate assembly when a collector plate is welded to the electrode assembly by the laser beam.SOLUTION: A collector plate 130a, 130b and an active material non-coating portion 121a, 122a of an electrode plate 121, 122 are laser-welded to each other while a light absorbing member 140a, 140b is coupled to the active material non-coating portion 121a, 122a. |
