Abstract: To provide a method which allows a battery with a flat base to be produced in a cylindrical battery manufacturing method in which a metallic casing with a larger outside diameter than the outside diameter of the metallic casing in the finished battery is used, a battery element is housed in the said metallic casing, then the outside diameter of the metallic casing reduced; to reduce the occurrence of defective batteries due to deficient electric conduction between the metallic casing and the electrode lead; and to improve the safety of the said cylindrical battery in the event of an outside short circuit. In the making of a battery in which the outside diameter of the metallic casing in the finished battery is A, the outside diameter of the metallic casing used is made to satisfy the relationship L2>A.gtoreq.L3.

Abstract: A non-aqueous electrolyte battery wherein the battery element comprising a cathode, an anode and separator, is housed and sealed completely into a cylindrical metallic casing after being impregnated with electrolyte, and said battery is featured by that the opening of its casing is sandwiched between and closed by the insulating gasket placed at the internal surface, and the metallic reinforcement placed at the external surface.

Abstract: The present invention provides nonaqueous electrolyte secondary cells capable of withstanding severe overdischarge to obtain nonaqueous electrolyte secondary batteries having satisfactory cycle characteristics. A spinel-type lithium-containing metallic oxide represented by LiM.sub.2 O.sub.4 (where M is a transitional metal element) is used as an active substance for each of the positive and negative electrodes of the cell embodying the invention. In an organic electrolyte containing lithium ion, the spinel-type lithium-containing metallic oxide represented by LiM.sub.2 O.sub.4 is capable of reversibly undergoing an electrochemical oxidation reaction involving removal of doping lithium ion and also an electrochemical reduction reaction involving lithium ion doping. Accordingly, when the cell of the invention is overdischarged (.apprxeq.

Abstract: At least one of a positive electrode and a negative electrode constituting an electrode assembly comprises at least two divided electrode portions not connected through electron conduction. The divided electrode portions each have an electrode lead extending outward from a battery container, which has at least two external terminals of the same polarity which is provided by the lead. The external terminals of the same polarity are connected to each other via a resistor having a PTC effect. The battery is assured of improved safety even when large-sized.

Abstract: A nonaqueous electrolyte secondary battery comprising a cathode, an anode, a separator and a nonaqueous electrolyte, wherein a spinel type lithium manganese complex oxide is used as main active substance for the cathode, which is characterized in that a solid state lithium ion conductor is mixed with the main active substance in the cathode.

Abstract: A nonaqueous electrolyte secondary cell provided with (a) a negative electrode consisting essentially of a carrier for a negative electrode active material , said carrier being capable of being doped and dedoped with lithium, (b) a positive electrode comprising, as an essential positive electrode active material, Li.sub.1+x Mn.sub.2 O.sub.4, wherein x>0, obtained by doping a lithium-manganese complex oxide with lithium and (c) a nonaqueous electrolyte. The secondary cell has an increased cell capacity as well as a high energy density and an excellent charge-discharge characteristics .

Abstract: A nonaqueous electrolyte secondary batter which comprises a negative electrode which comprises a carbonaceous material capable of doping and de-doping lithium, a positive electrode made of an active material which comprises a Li-containing metal complex oxide of the general formula, Li.sub.x MO.sub.2, wherein M represents at least one member selected from the group consisting of Co, Ni and Mn and 0.5.ltoreq.x.ltoreq.1, and a nonaqueous electrolyte which contains an electrolyte and an organic solvent therefor. The organic solvent is a mixed solvent of propylene carbonate and at least one member selected from the group consisting of diethyl carbonate and dipropyl carbonate.

Abstract: There is disclosed a non-aqueous electrolyte secondary battery in which carbonaceous material is used as the anode active material and charge/discharge is carried out by doping/undoping of lithium. The carbonaceous material has a grading distribution such that the 10% cumulative or accumulated diameter is 6 to 20 .mu.m, the 50% cumulative diameter is 20 to 55 .mu.m, and the 90% cumulative diameter is 55 to 90 .mu.m. When a carbonaceous material such that the grading distribution satisfies the above condition is used as the anode active material, the self-discharge rate is suppressed and occurrence of an internal short-circuit is also prevented.

Abstract: A cell having an explosion proof valve is disclosed, in which the valve is deformable upon increase of inner pressure of the cell to cut a connection lead which connects the valve with a generator unit contained in the cell. The supply of charging current is cut off when the inner pressure of the cell has abnormally increased. The gradual increase of the inner pressure can be effected by selecting suitable cathode active material.

Abstract: An organic electrolyte cell is disclosed which comprises an anode mainly composed of Li and containing Al and a cathode mainly composed of manganese dioxide, wherein the amounts for Li, Al and manganese dioxide are determined such that they are included within a region surrounded by:y=0.2 x+0.055y=0.2 x+0.080x.gtoreq.0.03wherex represents the ratio t2/t1 between the thickness t1 for Li and the thickness t2 for A1 for expressing the ratio of amounts between Li and Al constituting the anode; andy represents the weight ratio (Li/MnO.sub.2) between Li and manganese dioxide whereby the increase in the internal resistance at the final stage of the discharge is suppressed, so that the cell capacity can be utilized effectively to the last.

Abstract: A rechargeable organic electrolyte cell includes a cathode mainly composed of LiMn.sub.2 O4, obtained by sintering manganese dioxide with either lithium carbonate or lithium iodide.

Abstract: An organic electrolyte cell is disclosed which comprises an anode made of Li or Li alloy, an organic electrolyte and cathode active material made of Li and metal complex oxide represented by LiMO.sub.2 wherein M stands for at least one of Co, Ni, Fe, Cr, and V. The cell has a discharge voltage of 1.2 to 1.3 volts which is compatible with mercury cell.

Abstract: An organic electrolyte cell included an anode composed mainly of lithium, a cathode and an organic electrolyte solution. There are interposed between the anode and the cathode a layer of a powdered material for holding the electrolyte solution therein and a microporous film having numerous micro size pores the ions can pass through.

Abstract: Alkaline cell comprising a cathode material, an alkaline electrolyte and an anode material, which are sealed in a container, said cathode material containing an Ni- and Ag-containing oxide wherein the trivalent nickel ion (Ni.sup.3+) and the monovalent silver ion (Ag.sup.+) are present in a substantially equimolar ratio.