| abstract |
The present invention provides flexible batteries. A flexible battery according to an embodiment of the present invention includes: an electrode assembly; and an exterior material for sealing the electrode assembly and electrolyte together. The electrode assembly and the exterior material are formed so as to have the same directionality with respect to the longitudinally contracted and relaxed patterns during bending, and the patterned regions include regions satisfying the conditions of the present invention. According to this, both the exterior material and the electrode assembly are provided with patterns for shrinking and relaxing in the longitudinal direction, thereby preventing or minimizing deterioration of desired physical properties even if bending occurs. Therefore, the present invention is applicable not only to wearable devices such as smart watches and watch chains, but also to various electronic devices such as roll-up displays that need to ensure the flexibility of batteries. |