| abstract |
(57) [Problem] An object of the present invention is to provide a simple method for producing a thin battery with excellent stability and small possibility of deformation or destruction of the battery. SOLUTION: In a method for manufacturing a film-covered battery 7 in which a power generation element including at least a positive electrode, a negative electrode, an electrolyte and a separator is packaged with a film, for example, two flat plates 8 are used. A method for manufacturing a film-covered battery, comprising at least once a pre-charging step of charging while applying pressure between the batteries. |