New patent application published for: Secondary Battery

A secondary battery capable of reducing a risk of damage to a separator includes an electrode assembly and a current collector. The current collector includes a current collecting unit and a pole unit, where the pole unit includes a support portion coupled to an end of a current collecting protrusion. The support portion has a greater cross-sectional area than the current collecting protrusion and is accommodated in an opening of a plate of the current collecting unit. A stopper having an upper surface spaced above the plate of the current collecting unit may be positioned adjacent to the current collecting protrusion of the pole unit.