Dai Nippon Printing Co., Ltd.

Mitsui Chemicals, Inc.

Hirohisa Akita

Kazuhiko Yokota

Masataka Okushita

Youichi Mochizuki

Sumito Nishida

Takanori Yamashita

Atsuko Takahagi

Rikiya Yamashita

Noboru Akiyama

Daisuke Watanabe

Hiroshi Hoya

Makoto Amano

In a packaging body provided with at least an inner layer composed of a thermal-adhesive polyolefin based resin and a barrier layer composed of a metal foil, in which metal terminals are sealed by the thermal-adhesive resin with unconnected ends of the metal terminals protruding outside, an adhesive sheet for sealing metal terminals of a flat electrochemical cell which is not only able to prevent a short circuit between the barrier layer and the metal terminals but high in a layer-to-layer adhesive strength and a low possibility of a reduction in battery performance to be caused due to invasion of moisture is provided. In the adhesive sheet for sealing a metal terminal part of a flat electrochemical cell according to the invention, a fibrous sheet or a porous sheet is covered by the inner layer and an acid-modified polyolefin based resin layer having adhesive properties.

Adhesive sheet for sealing metal terminals of flat electrochemical cell

Provided is an electrochemical cell packaging material with excellent electrolyte resistance. An electrochemical cell packaging material includes the following in a laminated structure: a substrate layer that, at a minimum, includes resin film; a protective layer that is arranged as the outermost layer and protects the substrate layer; a thermal adhesion layer that is arranged as the innermost layer and which includes thermal adhesion resin; and a barrier layer that includes metal foil and is arranged between the substrate layer and the thermal adhesion layer. The protective layer is formed of an epoxy resin that has bisphenol A or bisphenol F as an element in the backbone.

Electrochemical cell packaging material

Provided is a packaging material for an electrochemical cell which prevents the occurrence of short circuits. A packaging material for an electrochemical cell configured by laminating a base material layer including: at least a resin film; a heat-adhesive layer including a heat-adhesive resin, the heat-adhesive layer being disposed on the innermost layer; and a barrier layer including a metal foil, the barrier layer being disposed between the base material layer and the heat-adhesive layer, wherein a chemical-conversion-treated layer including alumina particles and modified epoxy resin is formed on the surface of at least the heat adhesive layer side of the barrier layer.

Packaging material for electrochemical cell

A packaging material for a cell including a layered film in which at least a base-material layer, an adhesive layer, a metallic layer, and a sealant layer are layered in the stated order. The packaging material for a cell including a layered body in which at least a base-material layer, an adhesive layer, a metallic layer, and a sealant layer are layered in the stated order, wherein the packaging material for a cell can be imparted with highly exceptional moldability, and dramatically less prone to pinholing and cracking during molding by using, as the metallic layer, an aluminum foil having 0.2% yield strength of 58-121 N/mmwhen a tensile test is performed in the direction parallel to the rolling direction.

Packaging material for cell

Provided is a packaging material for electrochemical cells which has an identification mark that can be recognized from the outside and that is difficult to forge. The packaging material comprises a multilayer film which has a structure formed by laminating a base layer (), an adhesive layer (), a metal foil layer (), an acid-modified polyolefin layer (), and a heat-sealable layer () in this order, wherein the base layer () comprises both a oriented polyester film () and a oriented nylon film () with a printed layer () provided on the surface of the oriented polyester film () that faces the oriented nylon film ().

Electrochemical cell packaging material for housing an electrochemical cell body

To provide a technique for a battery-packaging material made of a film-form laminate in which at least a base material layer, an adhesive layer, a metal layer, and a sealant layer are laminated successively, wherein: electrolytic solution resistance is further improved by including a polyester film in the base material layer; cracks and pinholes are less likely to be created at the time of forming the polyester-film-including base material layer; and formability is improved. This battery-packaging material is made of a laminate in which at least a base material layer, an adhesive layer, a metal layer, and a sealant layer are laminated successively, wherein: the base material layer includes a polyester film; and the metal layer is an aluminum foil in which the 0.2% proof stress at the time of performing a tensile test in a direction parallel to the rolling direction is from 55 to 140 N/mm.

Battery-packaging material

Disclosed is a method for manufacturing an electrochemical cell, wherein an insulation failure product can be accurately rejected, and an electrochemical cell can be used again after the insulation failure inspection. In the method for manufacturing the electrochemical cell (), which is configured by hermetically housing an electrochemical cell main body () such that the leading end of a metal terminal () protrudes to the outside of the outer housing (), an impulse voltage is applied between the metal terminal () and a metal foil layer (), the waveform of the voltage applied to the capacitance between the metal terminal () and the metal foil layer () is measured, and the insulation failure inspection step is performed.

Insulation failure inspecting apparatus, insulation failure inspecting method using same, and method for manufacturing electrochemical cell

This packaging material for electrochemical cells has an identification mark that can be recognized from the outside and that is difficult to forge. The packaging material includes a multilayer film which has a structure formed by laminating a base layer (), an adhesive layer (), a metal foil layer (), an acid-modified polyolefin layer (), and a heat-sealable layer () in this order, wherein the base layer () contains both a oriented polyester film () and a oriented nylon film () with a printed layer () provided on the surface of the oriented polyester film () that faces the oriented nylon film ().

A method for manufacturing an electrochemical cell includes housing a main cell body in an outer packaging body of packaging material formed by laminating a metal foil layer and a heat-sealable resin layer, provided the tip ends of a first metal terminal and a second metal terminal are protruding outside the outer packaging body, heat-sealing a peripheral edge portion of the outer packaging body so the outer packaging body has the first and second terminals protruding; applying a voltage between the first terminal and the foil layer or between the second terminal and the foil layer; and inspecting for insulation failure from a short circuit between the first or second terminal and the foil layer or from a crack in the heat-sealable resin layer, based on a variation of a voltage held between the one of the metal terminals and the metal foil layer after halting the voltage.

In a packaging material for electrochemical cell, a thermally adhesive resin layer is configured of a resin having a propylene based elastomer resin in a propylene based resin. This propylene based elastomer resin is a copolymer composed of a constitutional unit derived from propylene and a constitutional unit derived from an &#x3b1;-olefin having from 2 to 20 carbon atoms; when the total sum of the constitutional unit derived from propylene and the constitutional unit derived from an &#x3b1;-olefin is defined as 100% by mole, contains 50% by mole or more of the constitutional unit derived from propylene; and is satisfied with (a) a Shore A hardness (ASTM D2240) of from 65 to 90, (b) a melting point of from 130 to 170&#xb0; C., (c) a density (ASTM D1505) of from 860 to 875 kg/mand (d) a glass transition temperature as measured by DSC of from &#x2212;25&#xb0; C. to &#x2212;35&#xb0; C.

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Tokyo, Japan

Hirohisa Akita