Showa Denko Packaging Co., Ltd.

Kensuke Nagata

Koji Minamitani

Yuji Minamibori

Shunsuke Saito

Tetsunobu Kuramoto

Makoto Karatsu

Tsutomu Ganse

A laminate material with a metal exposed portion is efficiently produced. A peeling step is performed in which a laser beam L is irradiated on a resin layerof a laminate raw materialin which a resin layeris laminated on at least one surface of a metal foilto peel the resin layerand the metal foilto thereby form a peeled portion. Thereafter, the resin layersandcorresponding to the peeled portionsandare cut off to expose the metal foil

Method of producing laminate material

A power storage device includes a positive electrode part including a first metallic foil layer and a positive electrode active material layer partially laminated on one surface of the first metallic foil layer, a negative electrode part including a second metallic foil layer and a negative electrode active material layer partially laminated on one surface of the second metallic foil layer, and a separator arranged between the positive electrode part and the negative electrode part. The positive electrode active material layer is arranged between the first metallic foil layer and the separator, and the negative electrode active material layer is arranged between the second metallic foil layer and the separator. The peripheral regions of the one surfaces of the first and second metallic foil layers in which the positive and negative electrode active material layers are not formed are joined via a peripheral sealing layer containing a thermoplastic resin.

Thin power storage device and production method thereof

An outer casing material for a batteryis provided, wherein an outer layer, a metal foil layerand an inner layerare laminated via an adhesive layer; the inner layercomprises a sealant layerand a base material layer; the sealant layeris made from a propylene-ethylene random copolymer wherein a melt flow rate at 230&#xb0; C. thereof is in a range of 3 to 30 g/10 minutes; the base material layeris made of a resin composition wherein a melt flow rate at 230&#xb0; C. thereof is in a range of 0.1 to 15 g/10 minutes, xylene-soluble component Xs thereof satisfies the predetermined conditions, and the resin composition comprises 50 to 80% by mass of a propylene component (A) and 50 to 20% by mass of a copolymer component (B) which is an elastomer of a copolymer of propylene and ethylene and/or &#x3b1;-olefin having 4 to 12 carbons and includes 50 to 85% by mass of a polymerization unit originated from propylene.

Outer casing material for battery and lithium secondary battery

A first packaging material, a second packaging material, an electrode body having a positive electrode, a negative electrode, and a separator are provided. A packaging member is formed having an electrode body chamber. A first inner conducting portion allows conduction to a first metal foil and a second inner conducting portion allows conduction to a second metal foil. In the electrode body chamber, electrode body is conducted to a first inner conducting portion in the positive electrode and the electrode body is conducted to a second inner conducting portion in the negative electrode. At least one of the pair of the first metal foil and the positive electrode current collector of the positive electrode and the pair of the second metal foil and the negative electrode current collector of the negative electrode is made of the same metal.

Power storage device

An outer casing material for a battery is provided which is constituted by laminating an outer layer that includes a heat-resistant resin film, a metal foil layer, and an inner layer that includes a thermoplastic resin film, wherein a melt flow rate of the inner layer is in a range of greater than or equal to 1 and less than 10.

Provided is an oxygen permeable membrane for use in an air secondary battery, which excels in oxygen permeability, barrier performance to water, being capable of preventing electrolyte from leaking out. Such an oxygen permeable membrane includes a thermoplastic resin membrane and inorganic particles having pores having pore diameter of 10 &#x212b; or less contained in the thermoplastic resin membrane, in which the thermoplastic resin membrane has one surface on which hydrophobic treatment is effected.

Growing community of inventors

Hikone, Japan

Kensuke Nagata