Abstract: A nonaqueous secondary battery of the present invention comprises a polyvinylidene fluoride resin layer formed on either or both of the surface of the positive electrode and the negative electrode. This polyvinylidene fluoride resin layer exhibits excellent liquid retaining properties and thus can be formed on the surface of the electrodes to reduce the capacity drop during high temperature storage and hence improve the high temperature storage properties of the battery.

Abstract: A cylindrical alkaline storage battery including a spiraled electrode body composed of a pair of opposed electrodes spirally rolled up through a separator and coupled within a cylindrical casing, at least one of the electrodes being in the form of a non-sintered type electrode composed of an active material retention substrate of three dimensionally meshed structure impregnated with paste of an active material, and a current collector formed with a disc portion for connection to one end portion of the non-sintered type electrode and a lead portion for connection to a terminal, wherein the one end portion of the non-sintered type electrode is formed without impregnation of the paste of the active material, and wherein a perforated sheet metal welded to the one end portion of the non-sintered type electrode is welded at its side edge to the disc portion of the current collector.

Abstract: A thin type battery having a electricity generating element disposed in a sealed chamber formed by a laminated sheathing. The laminated sheathing forms the sealed chamber by overlapping and airtightly adhering opposing surfaces of the laminated films at a primary sealing area and at a secondary sealing area which is perpendicular to the direction of the primary sealing area. Collector terminals are connected to a positive electrode and to a negative electrode of the electricity generating element. The collector terminal are airtightly crimped in the secondary sealing area of the laminated sheathing. Also, the collector terminals extend outwardly of the laminated sheathing. The primary sealing part of the laminated sheathing is located over a surface of the electricity generating element.

Abstract: In a thin type sealed cell utilizing a cell case made of a laminated material, a storage life and reliability of the cell is increased by preventing a sectional surface at an end of the laminated material from being exposed in the cell case, and thereby a leakage of an electrolyte out of the cell and a short circuit in the cell are avoided. This is achieved by disposing a resin layer on the inner surface of the cell case composed of a sheet type laminated material, and covering the sectional surface existing inside the cell case with resin.

Abstract: The charge-discharge control circuit prevents over-charge and over-discharge of a plurality of series connected batteries. It is provided with a detection circuit to determine the state of charge and discharge of the batteries, at least one bypass circuit connected in parallel with one of the batteries, and a connection circuit which, in response to results from the detection circuit, selectively connects the bypass circuit to a battery determined to be in an approximately fully charged state or approximately fully discharged state.

Abstract: A battery is provided which includes: an electrode roll having a positive-electrode plate, a negative-electrode plate and a separator interposed therebetween; a battery casing accommodating the electrode roll; and a sealing plate laser-welded to an open end of the battery casing. On the outermost periphery of the electrode roll is located an electrode-base-exposed portion of either one of the positive-electrode plate and the negative-electrode plate. The sealing plate is laser-welded to the battery casing in a state that a collector tab formed by incising the electrode-base-exposed portion and folding the incised portion is held between the periphery of the open end of the battery casing and the sealing plate. With this construction, the electrical connection between the collector tab and the battery casing is assuredly achieved simultaneously with the sealing of the battery to suppress a reduction in the closed-circuit voltage and an increase in the internal resistance.

Abstract: The outside edges of a sealing plate are weld attached to close off an opening in a metal case of a prismatic battery of this invention. The sealing plate has an electrode rivet which passes through an electrode hole and sandwiches an insulating gasket to attach in an electrically insulating fashion. The battery case houses an electrode group with either its positive or negative electrode plate connected to the electrode rivet. The sealing plate has a periphery region or reinforcement rib which is formed thicker than the rivet region where the electrode rivet attaches, and the outside edges of this reinforcement rib are weld attached to the case.

Abstract: A method of manufacturing a battery containing a non-circular spiral electrode unit forms a true circular or elliptical cylindrical electrode unit by winding positive and negative electrode plates with a micro-porous polymer film separator disposed between the two electrode plates. The cylindrical electrode unit is pressed from both sides into a non-circular spiral electrode unit and inserted into an external case to form a battery. When the cylindrical electrode unit is pressed into a non-circular spiral electrode unit, the separator gurley value of the pressed non-circular spiral electrode unit is arranged to be in the range from 110% to 150%, where the separator gurley value of the cylindrical electrode unit is 100%.

Abstract: The battery of the present invention includes a case, an electrode group introduced into the case and a cover sealing the open side of the case. The cover has a battery electrode, an insulation panel, spacers, and a cover tab, fixed thereto. The battery electrode and the cover tab are electrically welded, and are insulated from the cover. The spacers and the insulation panel are made of an insulating material. A connection opening is formed between the introduction of the spacers and enables welding material to weld the cover tab to the electrode group.

Abstract: Corner region vacancies resulting from insertion of a spiral electrode unit into a prismatic can are fully utilized to reinforce the can and produce superior battery characteristics. A non-circular spiral electrode unit is made by rolling a negative electrode-separator-positive electrode sandwich. A prismatic shaped can has corners which are thicker than the straight-line regions of the can. The can houses the the electrode unit In a tightly sealed fashion with the outer winding of the electrode unit mechanically held in electrical contact with the can.

Abstract: Novel lead location and winding configuration allow more efficient spiral electrode fabrication for a battery that is less susceptible to internal short circuits. The battery has separator material sandwiched between positive and negative electrode strips, which are rolled into a spiral electrode unit. The electrodes have active material that covers a core except in regions where leads are attached. One lead is positioned at the outermost winding, and both sides of each lead face either separator material only or the same polarity electrode via separator material. A special lead taping processing step is eliminated.

Abstract: A nonaqueous electrolyte battery has a positive electrode, a negative electrode and separator laminate rolled into a spiral electrode unit contained in an external case filled with nonaqueous electrolyte. Battery voltage is between 3.5 V and 5.0 V when charged. A positive electrode supporting member material and the external case are both aluminum. The positive Electrode supporting member is exposed for at least a portion of the outermost winding of the spiral electrode unit, and this exposed supporting member contacts the inner surface of the external case to make an electrical connection.

Abstract: The nonaqueous electrolyte battery of this invention is provided with a spiral electrode unit comprising a separator laminated between a cathode and an anode rolled into a spiral shape having anode around the outer perimeter. An anode terminal tab disconnects from the outermost one circumference of anode residue after discharge to prevent residual anode deposition on the cathode when power is overdrawn.

Abstract: The present invention relates to a sealed type battery provided with a safety valve and a method of manufacturing the same, the sealed type battery of the present invention has a mouth-sealing plate, provided with the safety valve, serving as a terminal of one polarity, being arranged through an insulating member in a hole of a metallic cover closing an opened portion of an exterior can serving as a terminal of the other polarity, and an extension of a hole edge of the metallic cover being cramped to the insulating member to fix said mouth-sealing plate, whereby the cramping diameter can be reduced in comparison with that of the conventional battery, and as a result, the high hermeticity can be given to the battery and the electrolyte can be completely prevented from leaking.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.