Patent ID: 8828571

Claim:
A secondary battery comprising: a plurality of electrode assemblies; a current collector electrically connected to each electrode assembly of the plurality of electrode assemblies; a case accommodating the plurality of electrode assemblies and the current collector; a cap plate sealing the case; and an electrode terminal electrically connected to the current collector and penetrating the cap plate, wherein the plurality of electrode assemblies are arranged such that an axis of each electrode assembly is parallel to a bottom surface of the case and the plurality of electrode assemblies are disposed in a longitudinal direction with respect to each other, the longitudinal direction being a direction between the cap plate and the bottom surface, the plurality of electrode assemblies includes at least an upper electrode assembly and a lower electrode assembly, and the upper electrode assembly is closer to the cap plate than the lower electrode assembly is to the cap plate, and the lower electrode assembly is closer to the bottom surface of the case than the upper electrode assembly is to the bottom surface.