Polymer battery module packaging sheet and a method of manufacturing the same

摘要

A polymer battery module packaging sheet includes, as essential components, a base layer (61), an aluminum layer (62), chemical conversion coatings (64a, 64b) coating the opposite surfaces of the aluminum layer (62), and an innermost layer (63). The chemical conversion coatings (64a, 64b) are formed by processing the opposite surfaces of the aluminum layer (62) by a phosphate treatment method. The base layer (61) and the innermost layer (63) are bonded to the chemical conversion coatings (64a, 64b) of the aluminum layer (62) with adhesive layers (65a, 65b), respectively.

主权项

1. A polymer battery module packaging sheet comprising:
a laminate body forming an embossed type outer packaging, the laminate body including at least a substrate layer formed of a nylon film, a first adhesive layer, a first chemical conversion layer, an aluminum layer, a second chemical conversion layer, a second adhesive layer, and an innermost layer that are laminated in this order; wherein:
the aluminum layer is formed of annealed aluminum having an iron content of 0.3 to 9.0 percent by weight, and the innermost layer is formed of cast polypropylene that contains 5% or above of a low-crystalline propylene-butene copolymer or an ethylene-butene-propylene terpolymer,the first chemical conversion layer and the second chemical conversion layer are formed by performing a phosphoric acid chromate treatment comprising applying a film of an aqueous solution comprising a phenolic resin, a trivalent chromium fluoride compound, and phosphoric acid to surfaces of the aluminum layer and heating the aluminum layer at a surface temperature in a range of from 170 to 200° C.,the laminate body further includes an intermediate layer arranged between the aluminum layer and the innermost layer,the aluminum layer has a thickness of from 40 μm to 80 μm; andan ozonated surface is formed on the second adhesive layer.