Patent ID: 8067113

Claim:
A polymer battery comprises: a polymer battery module, an electrolyte, a polymer battery module packaging sheet, enclosing and sealing the polymer battery and the electrolyte, and tabs connected to the polymer battery module and projecting from periphery of the polymer battery module packaging sheet, the polymer battery module packaging sheet for packaging a polymer battery module, comprising, as essential components provided in the following order from the outside to the inside: a base layer including an oriented polyester film or an oriented nylon film, an aluminum layer, the aluminum layer having an iron content of 0.3 to 0.9 percent by weight, a chemical conversion coating, and an innermost layer; wherein (1) the innermost layer includes an adhesive resin layer and an innermost resin layer, (2) the chemical conversion coating is formed from an aqueous solution comprising a mixture of a phenolic resin, a trivalent chromium fluoride compound, and phosphoric acid, and (3) the tabs are covered with tab films which are interposed between the periphery of the polymer battery module packaging sheet and the tabs, wherein the adhesive resin layer is formed of an acid-modified polyolefin resin, and the innermost resin layer serves as a heat-sealing layer and is formed of an ethylene-propylene copolymer resin.