MANUFACTURING METHOD OF POLYMER BATTERY

PROBLEM TO BE SOLVED: To provide a manufacturing method of a polymer battery which allows flexibility in the shape of a battery. SOLUTION: This is the manufacturing method equipped with the first process to house a battery element group composed of a positive electrode, a negative electrode and a solid polyelectrolyte in a flexible sheath body, the second process in which the inside of the flexible sheath body is sealed under a reducing pressure less than atmospheric pressure, and the third process in which the positive electrode, the negative electrode and the solid electrolyte and heat welded. Otherwise, this is the manufacturing method in which a heat press bonding is made after having returned the third process to the atmosphere of higher than the atmospheric pressure.