Sanyo Electric Co., Ltd.

Mitsubishi Kasei Corporation

C.uyemura Co., Ltd.

Saga Sanyo Industry Co., Ltd.

Hironosuke Ikeda

Satoshi Narukawa

Shigehiro Nakaido

Makoto Yamada

Mitsunori Hara

Seiki Yoshida

Koji Nishio

Masahisa Fujimoto

Hitoshi Ono

Nobuhiro Furukawa

Osamu Ando

Masaru Yamano

Ichiro Takahara

Kazuo Ito

Toshiyuki Kudo

Hiroshi Kutsuyama

Kazuhiro Suenaga

Jiro Okuda

Shigeaki Noda

Hisao Oishi

Etsuro Yamashita

Hitoshi Nakashima

Kakushiyou Yoshida

Tadashi Ezaki

Rikizou Yamaguchi

Mitsuyasu Kubo

Hiroji Maeda

Metal is deposited on a three-dimensional network plastic substrate having internal open cells by a gas phase plating technique to form a metal layer covering all three-dimensional network lattice surface to form a support. An active material is carried on the support to form an electrode. The electrode is improved in active material-support adhesion, allows the amounts of conductive agent and binder to be reduced, and provides a cell with improved performance. It is especially useful in a secondary lithium cell.

Electrode

A solid electrolytic capacitor is disclosed wherein use is made of an electrode produced by simultaneously forming an oxide film layer and a conductive polymer layer through electrolytic oxidation or other chemical treatments on a metal subjected to a surface roughening treatment, or forming a conductive polymer layer through plasma polymerization or other chemical treatments on a metal successively subjected to surface roughening and anodic oxidation treatments.

Solid electrolytic capacitor

An aluminum foil type solid electrolytic capacitor wherein the distance between the two foils in the capacitor element to be determined by the thickness of separator being kept at a value between ten to sixty micrometers, solid electrolyte being formed between the two foils by the thermal decomposition of electrolytic solution impregnated in the capacitor element. Manufacturing methods of making an aluminum foil type solid electrolytic capacitor with a manganese dioxide electrolytic layer between the electrode foils, wherein the layer is formed by decomposing the electrolytic solution thermally under conditions of a temperature between 200 and 260.degree. C. and of a time interval between 20 and 40 minutes, wherein the layer is formed by decomposing electrolytic solution with fine powders of manganese dioxide, wherein lithium is doped in the layer or wherein electrochemical conversion processes are used for restoring an aluminum oxide film. Manufacturing methods of making a chip type aluminum solid electrolytic capacitor, wherein a capacitor element is fixed in a case with resin around the center of the case or wherein one lead of a capacitor element is connected electrically to a metallic case into which the capacitor element is inserted.

Aluminum solid electrolytic capacitor and manufacturing method thereof

A non-aqueous electrolyte battery comprising a spiral electrode body provided by winding a band-shaped negative electrode plate of a light metal and a band-shaped positive electrode plates through a separator, an arbitrary portion where said positive and negative electrode plates are faced each other being isolated by interposition of a heat resisting insulating member which is made of a material different from said separator.

Non-aqueous electrolyte battery with spiral wound electrodes

In a lithium battery having a negative electrode formed with lithium as active material and the positive electrode formed with manganese dioxide, carbon fluoride or the like as the active material, the discharge capacity of the negative electrode is made smaller than the discharge capacity of the positive electrode, whereby a drop in the battery voltage during the final discharge stage is steepened, and prevents a device using such a lithium battery as a power supply from operating in an unstable manner, thereby improving the reliability of such device.

Lithium battery

The present application discloses a layer-built cell comprising: a cell assembly formed by putting together a plurality of elemental cells each having thereon a positive terminal and a negative terminal, such that the positive terminals and the negative terminals of the respective elemental cells are located on the same plane; a first insulating plate disposed on the cell assembly and having therein a plurality of through-bores; connecting pieces located on the first insulating plate and passing through the through-bores to connect the elemental cells to one another in series; a second insulating plate disposed on the connecting pieces and having two through-bores; positive and negative lead pieces passing through and projected from the through-bores in the first and second insulating plates; and a terminal plate disposed on the second insulating plate and having thereon a positive external terminal connected to the positive lead piece and a negative external terminal connected to the negative lead piece. Thus, according to the layer-built cell of the present invention, it is possible to prevent undesired electrical connects between the plurality of connecting pieces and the positive and negative lead pieces. Furthermore, according to the present invention, since all elemental cells can be used in the same positional direction, the assembling work may be very simplified.

Layer-built cell

The present application discloses a safety valve means for battery comprising a lid plate having therein a valve hole, a thin plate overlapped on the lid plate for closing the valve hole, a terminal plate in the reverse dish shape overlapped on the thin plate and having a gas removing hole and a downwardly projected cutter means and forming a valve chamber together with the thin plate, a holding means for holding the periphery of the thin plate between the lid plate and the terminal plate by caulking the turning edge of the lid plate or the terminal plate and an annular resilient member disposed between the thin plate and the terminal plate and pressed by the terminal plate to press the thin plate. According to safety valve means for battery of the present invention, when the periphery of the thin plate is held by and between the lid plate and the terminal plate, holding pressure is adapted to be adsorbed by the annular resilient member, thereby to restrain the occurrence of bent of the thin plate which is otherwise resulted from the holding pressure above-mentioned. Therefore, the thin plate may be located at a predetermined position, whereby a highly reliable safety valve having high precision may be obtained. Furthermore, it is possible to maintain strong sticking of the lid plate to the thin plate. Moreover, in the valve chamber the annular resilient member is disposed between the thin plate and terminal plate in a compressed manner, thereby to prevent the electrolyte from leaking along the abutment surfaces of the annular resilient member and the terminal plate.

Safety valve means for battery

A battery with improved performance has a collector mechanism which facilitates assembly. The battery has a first centrally located electrode plate, which has a first polarity. Second and third electrode plates having a second polarity are located above and below the first electrode plate, respectively, and are separated therefrom by separator layers. A first outer case forms a terminal of the first polarity and is insulated from the second electrode plate by a first insulating plate. A second outer case is electrically connected to the second and third electrode plates. The first outer case is electrically connected to the first electrode plate by a collector rod which passes through one of the separator layers, the second electrode plate, and the first insulating plate.

Battery with internal electrical connectors

The present application discloses a battery comprising: an electrode assembly formed by alternately superposing each of at least two electrode plates having one polarity and at least one electrode plate having the other polarity with each of separator layers therebetween; a battery vessel for housing the electrode assembly and constituted by a metallic outer case and a metallic closure cover joined to the metallic outer case; a collector rod having a flange located inside the closure cover, the collector rod passing through a through-bore formed in the closure cover, through an insulating member so that one end of the collector rod is projected from the closure cover; and a metallic ring fitted to the projected portion of the collector rod with an insulating member disposed between the metallic ring and the closure cover. According to the battery of the present invention, the head of the projected portion of the collector rod is crushed and this crushed portion is embedded in a concave portion formed in the top surface of the ring. According to the battery of the present invention, said electrode plates having said one polarity are electrically connected to the battery vessel, and said at least one electrode plate having said other polarity are electrically connected to the collector rod. According to the battery of the present invention, the collector rod is rigidly secured to the closure cover, thereby to provide higher air-tightness and to improve the effect of current collecting of the respective electrode plates with easier assembling.

Battery

The present application discloses a battery comprising a collector rod serving also as a winding core and having at one end thereof a non-circle shape flange, positioning means formed at the flange, a spiral electrode formed by band-shape positive and negative electrode plates with a separator layer therebetween wound upon the collector rod with one of the electrode plates electrically connected to the collector rod, a battery vessel for housing the spiral electrode and to which the other of the electrode plates being electrically connected, a lid for hermetically closing the opening of the battery vessel through insulating packing and for simultaneously forming a terminal of said one electrode plate, and conductive resilient means having one end positioned by the positioning means and the other end in contact with the lid so that the conductive resilient means is pressed by the flange and the lid to electrically connect the collector rod and the lid to each other. The provision of the non-circle shape flange at one end of the collector rod serving also as a winding core, facilitates the winding operation of positive and negative electrode plates upon the collector rod, whereby the working efficiency may be improved. The positioning means at the flange eliminates the necessity of welding the conductive resilient means to the collector rod and permits the conductive resilient means to be positioned at a predetermined position all the times, whereby electrical connection means may be improved.

The present invention discloses a battery in which a plurality of positive and negative electrodes are alternately superposed, with each of separator layers therebetween, in the form of flat package. Through-bores are centrally defined in the electrode having one polarity interposed between a pair of electrodes having the other polarity, and both separator layers sandwiching said electrode having said one polarity. Passed through these central bores is an electrical contact member, of which at least the portion in contact with said electrode having said one polarity, is coated with insulating material. Said pair of electrodes having said other polarity are therefore electrically connected to each other by said electrical contact member. Thus, electric contact between the electrodes having a same polarity may simply be provided, internal short-circuit in the battery may be prevented and the assembling of the battery may be facilitated.

Battery with internal electrical connector

The present invention discloses a method of manufacturing positive electrodes for nonaqueous cells in which manganese dioxide is used as positive active material and light metals such as lithium, sodium or aluminium are used as negative active material, said method comprising the steps of adding to manganese dioxide active material powder, a binder and a viscous agent solution decomposable at temperatures lower than the melting point of the binder, thereby to form paste, applying such paste to the supporting member, and heat-treating this paste-applied supporting member firstly at the decomposition temperature of the viscous agent in an oxidization atmosphere, and secondly at the melting point of the binder under vacuum or in an inert atmosphere, whereby a decrease in the discharge capacity during the manufacture is restrained, to improve the cell performance.

Method of manufacturing positive electrode for nonaqueous cell

A process for preparing positive electrodes for non-aqueous cells is provided. Manganese dioxide is heat treated at a temperature of from 350 - 430.degree. C; the treated manganese dioxide is mixed with a conductive agent and binder and the mixture molded; and the molding is heat treated at a temperature of from 200 - 350.degree. C. The process provides positive electrodes for non-aqueous cells having excellent discharge characteristics.

Process for producing a positive electrode for a non-aqueous cell

An electrolytic corrosion measuring apparatus comprising a first terminal to be connected to an electric conductor, such as a rail of electric railways, water pipe, gas pipe, telephone cable, power cable or the like, installed in electrical contact with the earth and a second terminal to be connected to an earthed reference electrode; a solid state electrochemical potential memory device which exhibits a terminal voltage between an anode and a cathode linearly changing as a function of the charging or discharging quantity of electricity fed to the device and which is capable of holding the terminal voltage, said device being connected to the terminals to receive an input therefrom; an amplifier for amplifying the terminal voltage of the device; and a meter for displaying the output of the amplifier. A preferred embodiment of the present invention comprises two sets of such memory device, amplifier and meter: one being for a positive going component of the input and the other for a negative component. The value indicated by the meter is associated with an amount of electrolytic corrosion occurring in the conductor during a time period when the apparatus is connected to the conductor and the earth, and thus affords a qualitative measurement indication of the amount of electrolytic corrosion so occurring.

Apparatus for measuring stray current electrolytic corrosion

A stylus grinding device for use in a video disc player comprises a rotary grinding disc adapted to be rotated at its center during a grinding operation subject to the pickup stylus. The stylus grinding device is designed such that the amount of the pickup stylus to be ground varies depending upon the duration of actual service performed by the pickup stylus to reproduce video information recorded on a flexible foil-type disc record.

Growing community of inventors

Hirakata, Japan

Hironosuke Ikeda