Flexible battery and method for manufacturing flexible battery

A flexible battery, comprising:

• an electrode group including a first electrode and a second electrode;
• a pair of electrode leads connected to the first electrode and the second electrode, respectively;
• electrode parallel connection tabs configured to connect the first electrode and the second electrode to identical electrodes, respectively, in the electrode group, to fix one end of the electrode group;
• and
• a housing that accommodates the electrode group, wherein
• the electrode leads are connected to the first electrode and the second electrode, respectively, at a first end of the electrode group,
• the first electrode includes a first current collector and a first active material layer formed on the surface of the first current collector and the second electrode includes a second current collector and a second active material layer formed on the surface of the second current collector,
• the first active material layer has a first non-facing portion with respect to the second active material layer at the first end and a second non-facing portion with respect to the second active material layer at a second end opposite to the first end,
• a shortest length of the first non-facing portion is equal to or greater than a shortest length of the second non-facing portion located at the second end, which is fixed by the electrode parallel connection tabs in a state where the flexible battery is not bent or where an external force is not applied, and
• the first electrode includes an electrode lead connection tab connected to one of the electrode leads at the first end and one of the electrode parallel connection tabs at the second end.