Method for producing packaging material for batteries and battery

Abstract

A method for producing a battery packaging material, the method including a step of obtaining a laminate by laminating at least a base material layer, a barrier layer, a cured resin layer and a heat-sealable resin layer in this order, wherein at least one layer of the base material layer is formed of a polybutylene terephthalate film, and a value determined by dividing a piercing strength X (N) in the case of piercing the laminate from its base material layer side measured by a method in accordance with a provision of JIS Z1707:1997 by a thickness Y (μm) of the polybutylene terephthalate film is 1.02 N/μm or more.

1 . A method for producing a battery packaging material, the method comprising a step of obtaining a laminate by laminating at least a base material layer, a barrier layer, a cured resin layer and a heat-sealable resin layer in this order, wherein
 at least one layer of the base material layer is formed of a polybutylene terephthalate film, and   a value determined by dividing a piercing strength X (N) in the case of piercing the laminate from its base material layer side measured by a method in accordance with a provision of JIS Z1707:1997 by a thickness Y (μm) of the polybutylene terephthalate film is 1.02 N/μm or more.   
     
     
         2 . A method comprising a step of obtaining a laminate by laminating at least a base material layer, a barrier layer, a cured resin layer and a heat-sealable resin layer in this order, wherein
 at least one layer of the base material layer is formed of a polybutylene terephthalate film, and   in the step of obtaining the laminate and a following step thereof, a sum total of a product of a temperature T (° C.) and a time S (minutes) when the polybutylene terephthalate film is exposed to 100° C. or more is set to 160 or less.   
     
     
         3 . A battery in which a battery element containing at least a positive electrode, a negative electrode, and an electrolyte is contained in a packaging formed of a battery packaging material constituted of a laminate including a base material layer, a barrier layer, a cured resin layer, and a heat-sealable resin layer in this order, wherein
 at least one layer of the base material layer is formed of a polybutylene terephthalate film, and   a value determined by dividing a piercing strength X (N) in the case of piercing the laminate from the base material layer side measured by a method in accordance with a provision of JIS Z1707:1997 by a thickness Y (μm) of the polybutylene terephthalate film is 1.02 N/μm or more.