| 摘要 |
PURPOSE: A secondary battery is provided to improve efficiency and reliability at the welding of a current collector and non-coated portion, and easily detect whether or not be welded. CONSTITUTION: A secondary battery comprises: a case(100) including the space in inside; at least one electrode assembly(120) located in the case, stacking a separator between a positive electrode plate and a negative electrode plate, and including non-coated part in both ends; a current collector(130) including a protrusion part, which is inserted into the non-coated part and combined with the same; a current-collecting terminal(140) combined with one end of the current collector, and protruded to the upper part of the case; a cap plate(160), which is combined with the upper part of the case, sealing the case. |
