Mitsubishi Denki Kabushiki Kaisha

Other

Kabushiki Kaisha Toshiba

Mitsubishi Electric Corporation

Mitsushita Denki Kabushiki Kaisha

Mitsubushi Electric Corporation

Michio Murai

Yasuhiro Yoshida

Hisashi Shiota

Shigeru Aihara

Kouji Hamano

Takayuki Inuzuka

Daigo Takemura

Hiroaki Urushibata

Jun Aragane

Shou Shiraga

Sho Shiraga

Syo Shiraga

Osamu Hiroi

Shinya Naito

Takashi Nishimura

Hisashi Tsukamoto

Kenji Kawaguchi

Hideo Ichimura

Shinji Nakadeguchi

Hiroshi Kigawa

Masaru Takada

Makiko Kise

Shoji Yoshioka

Hidemoto Arai

Masaharu Moriyasu

Hironori Ozaki

Rikio Kondo

Muneaki Mukuda

Mamoru Terai

Yukiyasu Nakao

Tetsuyuki Kurata

Takanori Imai

Sei Tsunoda

Hiroyuki Nakagawa

Atsushi Mitsui

Shinya Tokizaki

Masahiko Hida

Hisashi Furuzawa

Chinatsu Sanda

Sigeru Aihara

An inspection method and an inspection apparatus capable of readily determining the necessity of replacement of a resin shock absorber at an elevator inspection location without using a car of a rated weight. First, an indenter is pressed into a resin shock absorber for an elevator. A load of pressing the indenter into the resin shock absorber is released. A physical property value indicative of a repulsive force that causes the indenter to bounce from the resin shock absorber by releasing the load is measured. The necessity of replacement of the resin shock absorber is determined by comparing a result of the physical property value obtained by measuring the repulsive force with a reference value prepared in advance.

Method and apparatus for inspecting resin shock absorber

A method for detecting degradation of resin film detects whether a resin coated rope having a circumferential portion coated with resin film has the resin film degraded. The method for detecting degradation of resin film includes: winding a wire on a circumferential portion of the resin coated rope; applying tension to the wire to compress the resin film in a radial direction of the resin coated rope; and comparing a first relationship with a second relationship to determine how the resin film is degraded, the first relationship indicating a relationship between the tension of the wire and how much amount the resin film has compressed, as obtained in the applying, the second relationship indicating a relationship between the tension of the wire and how much amount the resin film has compressed, as predetermined as a reference.

Method and apparatus for detecting degradation of resin film

An elevator rope including a rope main body; and a covering resin layer that covers the periphery of the rope main body and comprises a molded product of a composition which composition is produced by mixing a thermoplastic polyurethane elastomer, a thermoplastic resin other than the thermoplastic polyurethane elastomer and an isocyanate compound having two or more isocyanate groups per molecule; a rope main body impregnated with an impregnating solution comprising a hydroxy compound having two or more hydroxy groups per molecule and an isocyanate compound having two or more isocyanate groups per molecule and having a lower viscosity than a melt viscosity of the composition for forming the covering resin layer is used as the rope main body; the elevator rope has a stable friction coefficient that does not depend on temperature or sliding velocity.

Elevator rope

Conventional batteries are disadvantageous in that a firm outer case must be used to maintain an electrical connection between electrodes, which has been an obstacle to size reduction. Those in which each electrode and a separator are joined with an adhesive resin suffer from conflict between adhesive strength and battery characteristics, particularly ion conductivity and internal resistivity. To solve these problems, it is an object of the invention to reduce resistance between electrodes, i.e., internal resistance of a battery to improve battery characteristics while securing both insulation function against electron conduction and ion conductivity between electrodes and also to maintain adhesive strength enough to firmly join the electrodes thereby to provide a light, compact and thin battery. The internal resistivity can be diminished by joining a positive electrode and a negative electrode with an adhesive resin layer having at least one adhesive resin layer containing a filler. The adhesive resin layer has pores, which are filled with an electrolytic solution to exhibit sufficient ion conductivity thereby to improve battery characteristics and to retain adhesive strength.

Battery with adhesion resin layer including filler

Conventional separators had a function that their melting made minute holes inside the separator smaller, leading to cut off of ion conductivity in temperature increase due to unusual conditions such as short circuit. However, there was a problem that, at a temperature higher than a certain degree, not only the minute holes were closed but also the separator itself was melted to cause deformation of the separator such as shrink and generation of holes due to melting and insulation was broken. The present invention has been carried out in order to solve the above problems. The separator for batteries of the present invention comprises a first porous layer ( ) containing a thermoplastic resin as a main component and a second porous layer ( ) laminated on the first porous layer ( ), which has higher heat resistance than that of the first porous layer ( ).

Separator for battery and battery

A method for manufacturing a lithium ion secondary battery comprising preparing a positive electrode ( ) where a positive electrode active material ( ) is joined with a positive electrode collector ( ), a negative electrode ( ) where a negative electrode active material ( ) is joined with a negative electrode collector ( ), and a separator ( ) for retaining the electrolytes including lithium ions, being arranged between the positive electrode ( ) and the negative electrode ( ), the process of supplying adhesive solution applied on the separator with a second solvent different from a first solvent after applying the adhesive resin solution, where adhesive resin ( ) is dissolved in the above first solvent, to the separator ( ), and the process of forming an electrode laminate by sticking the positive electrode ( ) and the negative electrode ( ) to the separator ( ).

Method for manufacturing lithium ion secondary battery

A secondary battery having a positive electrode, a negative electrode, and a separator that is arranged between the two electrodes. A porous adhesive resin layer has through holes and the resin layer is formed between the separator and one of the positive electrode and the negative electrode to bond the separator to the one of positive and negative electrodes.

Lithium ion secondary battery

Package for nonaqueous electrolyte cell and cell comprising the same

A paste-like active material mixture prepared by mixing an active material powder and a particulate material comprising a polymer soluble in a nonaqueous electrolytic solution is applied to, e.g. collectors and to a uniform thickness, and then dried to form positive and negative electrodes containing an active material powder and a particulate polymer. The two electrodes are assembled into an electrode laminate into which the foregoing electrolytic solution is then injected.

A secondary lithium ion battery, comprising a plurality of laminates ( ) each having a separator ( ) holding an electrolytic solution to which a positive electrode ( ) and a negative electrode ( )are joined with an adhesive resin layer ( ) having a mixed phase composed of an electrolytic solution phase ( ), a polymer gel phase ( ) containing an electrolytic solution, and a polymer solid phase ( ).

Lithium ion secondary battery and its manufacture

A battery body, which is composed of a laminated body obtained by laminating a cathode and an anode via a separator or a wound body obtained by winding them in a laminated structure and a plurality of leads connected to the cathode and the anode, is contained in a flexible package, and after an electrolyte solution is injected thereinto, an opening of the package is sealed at pressure which is lower than atmospheric pressure and is reduced to not less than vapor pressure of the electrolyte solution so that a thin battery is fabricated. A rise in pressure in the battery due to generation of gas in the battery and volume expansion of the gas can be restrained when the battery is maintained at high temperature.

Thin battery and method of manufacturing

A battery package including laminate sheets adhered each other along their peripheral to form a container portion for receiving an electrode assembly and a seal portion. The seal portion surrounds the container portion and protrudes outwardly from side faces of the container portion. The seal portion has enough width to maintain the container portion free from moisture for long periods of time. The laminate sheets include a heat-adhesive polymer layer and a metal layer which stops moisture and provides a shape-maintaining ability to the laminar sheets. The seal portion is folded or curled to reduce a projection area of the battery package.

Battery package

An adhesive for batteries. The adhesive has improved wetting properties, improved adhesive strength and prevents deterioration of battery performance. Secondary batteries can be obtained having an arbitrary shape such as a thin shape with high reliability and high charge and discharge efficiency. The adhesive includes a thermoplastic resin, a solvent capable of dissolving the resin and a neutral and aprotic surfactant. The surfactant includes a polysiloxene skeleton. The adhesive is used in batteries for adhering an active material layer joined to a current collector to a separator.

Bonding agent for cells and cell using the same

To provide a practical thin type lithium ion secondary battery having a excellent safety and charge-discharge properties. A lithium ion secondary battery comprising a positive electrode a negative electrode a separator retaining an electrolytic solution, and an adhesive resin layer which connects said positive electrode and negative electrode to said separator characterized in that said adhesive resin layer comprises a polyvinylidene fluoride and an ionically-conducting polymer compound incorporated therein.

Lithium ion secondary battery and method of fabricating the same

A lithium ion battery comprising a positive electrode a negative electrode and a separator for retaining an electrolyte, characterized in that as an adhesive for bonding said positive electrode to said separator and said negative electrode to said separator there is used a thermosetting adhesive comprising a mixture of at least one organic vinyl compound containing two or more vinyl groups per molecule, a reaction catalyst and a volatile organic solvent.

Adhesive for battery, battery using the same and method of fabricating the same

Growing community of inventors

Tokyo, Japan

Michio Murai