ENERGY STORAGE DEVICE AND METHOD OF MANUFACTURING ENERGY STORAGE DEVICE

An energy storage device includes an electrode assembly formed by winding a negative electrode plate, a separator and the like. An innermost periphery of the negative electrode plate, the separator and the like which are wound together has a flattened shape having a pair of bent portions disposed on opposite sides in a first direction as viewed in a direction of the winding axis, and an end edge of the negative electrode plate on an innermost periphery side is disposed at one bent portion out of the pair of bent portions or a position in the vicinity of the one bent portion.