US 7,285,334 B1Granted

Material for packaging cell, bag for packaging cell, and its production method

AssigneeDai Nippon Printing Co., Ltd.

InventorsRikiya Yamashita, Kazuki Yamada, Yuichi Hirai, Youichi Mochiduki, Takanori Yamashita, Hitoshi Sekino, Jun Fukuda, Kouichi Mikami, Hiroki Nakagawa, Miho Miyahara, Chie Kawai, Hideki Arao, Takakazu Goto

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Abstract

A lithium battery comprises a pouch (4) and a lithium battery module (2) packaged in the pouch (4). The pouch (4) is formed from a battery packaging laminated structure (10). The laminated structure (10) has an outermost layer (11), a barrier layer (12) and an innermost layer (14), or an outermost layer (11), a barrier layer (12), an intermediate layer (13) and an innermost layer (14) superposed in that order. The outermost layer (11) is formed of a formable base material, the barrier layer (12) is formed of a impermeable base material having a barrier property, the intermediate layer (13) is formed of a formable base material and the innermost layer (14) is formed of a heat-adhesive base material.

Claims14

Dependent claims

A battery packaging laminated structure comprising:

at least an outermost layer, a barrier layer and an innermost layer laminated in that order;
wherein the outermost layer is formed of a formable base material, the barrier layer is formed of an impermeable aluminum base material having a barrier property, and the innermost layer is a multilayer film including two resin films, wherein the resin film on the side of the barrier layer includes an unsaturated carboxylic acid graft polyolefin resin and the resin film that defines an exterior surface of the laminated structure includes a polyolefin resin, and the barrier layer has a surface on the side of the innermost layer coated with an acid-resistant film containing a mixture of a phosphate, which may be metal and/or non-metallic, and a water-soluble synthetic resin.

Dependencies are inferred from the claim text.