POWER STORAGE UNIT AND ELECTRONIC DEVICE

摘要

The present invention realizes a power storage unit having flexibility, etc. The present invention provides a bump to an exterior. For example, the present invention provides a bump for a part of an exterior to have a waveform in the cross section. The bump is not limited to a shape including a curve, but may be a shape including a straight line such as a square wave and a chopping wave. The present invention can make it easy to crush an exterior from the inside of a bent part by providing a bump to the exterior and can make it easy to unfold the exterior from the outside of the bent part.