SECONDARY BATTERY AND METHOD OF MANUFACTURING THE SAME

A secondary battery includes a battery device, an outer package member, a positive electrode wiring line, and a negative electrode wiring line. The battery device includes a positive electrode and a negative electrode. The outer package member has flexibility, and accommodates the battery device. The outer package member includes a seal part at one end, and includes no seal part at any position other than the one end. The positive electrode wiring line is coupled to the positive electrode and led to an outside of the outer package member via the seal part. The negative electrode wiring line is coupled to the negative electrode and led to the outside of the outer package member via the seal part. The outer package member has a flat and columnar shape. In the seal part, mutually opposed portions of the outer package member are joined to each other.