Mitsubishi Denki Kabushiki Kaisha

Other

Mitsushita Denki Kabushiki Kaisha

Kouji Hamano

Yasuhiro Yoshida

Hisashi Shiota

Shigeru Aihara

Michio Murai

Takayuki Inuzuka

Daigo Takemura

Hiroaki Urushibata

Jun Aragane

Shou Shiraga

Osamu Hiroi

Sho Shiraga

Syo Shiraga

Shoji Yoshioka

Makiko Kise

Takashi Nishimura

Sei Tsunoda

Hisashi Tsukamoto

Kenji Kawaguchi

Satoshi Wachi

Kenro Mitsuda

Hiroshi Adachi

Hideaki Katashiba

Hideo Maeda

Hisatoshi Fukumoto

Masaharu Moriyasu

Hideo Ichimura

Shinji Nakadeguchi

Hironori Ozaki

Sigeru Aihara

Kenro Mituda

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

A device for purifying exhaust gas of an internal combustion engine which provides improved purifying efficiency even in a lean operating condition without deteriorating the fuel efficiency. The device includes an electrochemical catalyst installed in the exhaust system of the internal combustion engine , the electro chemical catalyst containing an electron conducting substance and an ion conducting substance, the oxidizing reaction and the reducing reaction being promoted by the conduction of ions and electrons, thereby to electrochemically purify the exhaust gas G in the exhaust system.

Device for purifying exhaust gas of an internal combustion engine

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

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 fuel cell including a unit cell and a separator panel alternatingly stacked on one another. The unit cell includes an electrolyte membrane sandwiched between a fuel electrode and an oxidant electrode. The separator panel includes parallel fuel flow paths extending from a fluid supply port to a fluid discharge port for supplying fluid fuel to the fuel electrode and parallel oxidant flow paths extending from a fluid supply port to a fluid discharge port for supplying oxidant fluid to the oxidant electrode. At least the oxidant flow paths include groups of parallel flow paths, which extend back and forth within divided regions of the main surface of the separator panel. The oxidant flow paths may include groups of parallel flow paths, positions along the groups of the parallel flow paths at equal distance from the respective fluid supply port being distributed substantially evenly over the main surface of the separator panel. Also, groups of parallel flow paths extend back and forth within a region defined by a projection of the divided regions through which the oxidant flow paths extend. The ridge width of ridges defined between grooves within the parallel flow path group is smaller than the ridge width of the ridges defined between the grooves of the parallel flow path group adjacent to each other.

Fuel cell structure

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

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 secondary battery having an electrode body including a positive electrode made of a positive electrode active material layer joined to a current collector, a negative electrode made of a negative electrode active material layer joined to a current collector, a separator which is disposed between the positive electrode and the negative electrode and retains an electrolytic solution containing lithium ions, and a porous adhesive resin layer which retains the electrolytic solution and joins the separator to at least one of the positive electrode active material layer and to the negative electrode active material layer, the electrode body being sealed into a packaging bag, wherein an adhesive resin film capable of absorbing the electrolytic solution and gelling adheres the electrode body to the packaging bag.

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

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. To solve these problems, it is an object of the invention to provide a battery which requires no outer case so as to realize reduction in thickness and weight and yet exhibits excellence in both battery characteristics and adhesive strength. A positive electrode, a negative electrode, and a separator are joined via 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 having an adhesive resin layer containing a filler

An object is to provide with good productivity a practical lithium ion secondary battery which secures lightness in weight and safety without using a firm battery case and has reduced internal resistivity. The lithium ion secondary battery comprises a tabular roll type laminated electrode body in which a band-formed positive electrode ( ) comprising a positive electrode active material layer ( ) and a positive electrode current collector ( ) alternates with a band-formed negative electrode ( ) comprising a negative electrode active material layer ( ) and a negative electrode current collector ( ), having therebetween a band-formed rolled separator ( ) which holds a lithium ion-containing electrolytic solution, the positive electrode ( ) or the negative electrode ( ) being adhered with two separators ( ) by an adhesive layer ( ).

Growing community of inventors

Tokyo, Japan

Kouji Hamano