BATTERY CELL AND MANUFACTURING METHOD OF THE SAME

A battery cell capable of: holding an electrode laminate uniformly and improving lamination dislocation as well as the durability of an electrode is provided. A battery cell includes an electrode laminate in which a positive electrode and a negative electrode are alternately laminated via an electrolyte layer. The battery cell includes a tube-shaped insulating member that holds the electrode laminate, and the insulating member is heat-shrinkable mainly in a direction parallel to the lamination direction of the electrode laminate. The insulating member preferably has a heat shrinkage percentage of to −5% to 5% in a direction in which the current collector tab of the electrode laminate extends.