Secondary battery

A secondary battery comprising:

• a plurality of electrode assemblies, each electrode assembly of the plurality of electrode assemblies being wound about a winding axis into a jelly roll configuration and comprising a positive electrode plate having a positive electrode non-coating portion, a negative electrode plate having a negative electrode non-coating portion, and a separator between the positive electrode plate and the negative electrode plate, the positive electrode non-coating portion and the negative electrode non-coating portion being exposed at opposite ends of the winding axis of the each electrode assembly;
• a case having a top opening and an internal space accommodating the plurality of electrode assemblies;
• a cap plate sealing the top opening of the case;
• a positive electrode current collector plate perpendicular to the positive electrode non-coating portion and welded to the positive electrode non-coating portion of each of the plurality of electrode assemblies along a first welding line;
• a negative electrode current collector plate perpendicular to the negative electrode non-coating portion and welded to the negative electrode non-coating portion of each of the plurality of electrode assemblies along a second welding line;
• a positive electrode terminal on the cap plate and electrically connected to the positive electrode current collector plate;
• and
• a negative electrode terminal on the cap plate and electrically connected to the negative electrode current collector plate,
• wherein the plurality of electrode assemblies are stacked in a transverse direction.