Secondary Battery and Method of Manufacturing Same

A method of manufacturing a secondary battery, the method comprising:

• stacking an electrode plate and a separator on each other, the electrode plate including a main body portion and an electrode terminal portion protruding from the main body portion along a first direction;
• and
• thermally adhering the electrode plate and the separator stacked on each other, wherein
• the main body portion of the electrode plate includes a central region located in a vicinity of a center in the first direction, a first region located on a side close to the electrode terminal portion with respect to the central region in the first direction, and a second region located on a side opposite to the first region with respect to the central region in the first direction, and
• in the thermally adhering, an amount of heat applied to the first region per unit area is larger than an amount of heat applied to the second region per unit area.