Abstract: A sealed battery includes a lid closing a container of a sealed battery, an upper current collecting plate, a lead connecting an upper surface to an inner surface of the lid. A welding point of the lead is outside a position corresponding to a periphery of the cap. The lead includes a cylindrical lateral wall part extending vertically, an annular frame portion extending substantially horizontally from a first end of the lateral wall part, and a plurality of supplementary leads that extends substantially horizontally from a second end part of the lateral wall part. The frame portion extends from the first end part in substantially a first direction along a radial direction of the cylindrical lateral wall part, whereas the plurality of supplementary leads extends from the second end part in substantially a second direction opposite to the first direction along the radial direction.

Abstract: For accomplishing the subjects, the invention provides a nickel electrode material for use in a nickel electrode, wherein the positive-electrode material constituting the electrode material comprises: positive active material particles which comprise as the main component either a nickel hydroxide or a solid solution in a nickel hydroxide of one or more other elements and in which part of the nickel hydroxide has been oxidized; and a coating layer formed on the surface of the positive active material particles and comprising as the main component a high-order cobalt compound in which the cobalt has an oxidation number larger than 2, the average oxidation number of the nickel in the positive active material particles and the cobalt in the coating layer being from 2.04 to 2.40, and the positive-electrode material having a tap density of 2.0 g/cm3 or higher.

Abstract: The object of the invention is to provide a sealed battery having a low resistance and is excellent in output power performance, and a lead suitable for the sealed battery, and a battery stack comprising a plurality of such sealed batteries as described above, Provided is a sealed battery comprising a lid (50) for closing the open end of a container (60) which has, at the center of its upper surface, a valve body (90) covered with a cap (80) to form a safety valve, and an upper current collecting plate (2) connected via lead (20, 30) to the inner surface of lid (50), wherein a welding point of lead (20) to the inner surface of lid (50) is, in a flat view, outside the periphery of cap (80), and the length of lead (20, 30) from the welding point (20) on the inner surface of lid (50) to the nearest welding point (30) on the upper current collecting plate (2) is 1 to 2.

Abstract: Subjects for the invention are to provide a nickel electrode material having a satisfactory tap density and capable of attaining a sufficient reduction in discharge reserve and a process for producing the nickel electrode material, and to provide a nickel electrode and an alkaline storage battery having a high capacity and excellent internal-pressure characteristics.

Abstract: A subject for the invention is to provide a sealed nickel-hydrogen cell which has an increased capacity attained by reducing the initial generation of a negative-electrode discharge reserve and which has excellent discharge performance, e.g., high-rate discharge performance, and has high productivity.

Abstract: This invention relates to a hydrogen absorbing electrode, in which a rare earth element having a basicity weaker than that of La is mixed to a hydrogen absorbing alloy or contained in it for serving as a component element. The invention relates to a nickel electrode, in which a rare earth element is mixed to a nickel hydroxide or contained in it as a solid solution. The invention further relates to an alkaline storage battery, in which a rare earth element is coated on a surface of a nickel electrode or a surface of a separator.

Abstract: A hydrogen absorbing electrode using a hydrogen absorbing alloy including at least one or more kinds of transition metals belonging to VIIb-group, VIII-group or Ib-group in periodic table at a specified percentage, characterized in that a surface part of the hydrogen absorbing alloy forms a rich layer including the foregoing transition metals at a percentage larger than the foregoing specified percentage. Since the rich layer exists, an activation at initial stage of charge/discharge is not required. Accordingly, this electrode can be utilized effectively for a nickel-hydride secondary battery.

Abstract: A metal hydride electrode, in which a metallic cobalt powder is mixed, within a mixing range of 3 to 20 weight percents, with a hydrogen absorbing alloy powder formed by substituting a part of Ni of alloy expressed by a rational formula of MmNi.sub.5 with Al and at least one kind of Fe, Cu, Co, Mn, and the mixed powder is loaded in a porous alkaline-proof metal body. An nickel electrode, in which a cobalt monoxide powder is mixed with an active material powder within a mixing range of 5 to 15 weight percents, the active material powder comprising zinc existing within a range of 2 to 8 weight percents, under a solid solution state in a crystal of nickel hydroxide powder assuming a spherical shape including an inner pore volume of 0.14 ml/g or less, and the mixed powder is loaded in a porous alkaline-proof metal body.

Abstract: A metal hydride electrode, in which a metallic cobalt powder is mixed, within a mixing range of 3 to 20 weight percents, with a hydrogen absorbing alloy powder formed by substituting a part of Ni of alloy expressed by a rational formula of MmNi.sub.5 with Al and at least one kind of Fe, Cu, Co, Mn, and the mixed powder is loaded in a porous alkaline-proof metal body. An nickel electrode, in which a cobalt monoxide powder is mixed with an active material powder within a mixing range of 5 to 15 weight percents, the active material powder comprising zinc existing within a range of 2 to 8 weight percents, under a solid solution state in a crystal of nickel hydroxide powder assuming a spherical shape including an inner pore volume of 0.14 ml/g or less, and the mixed powder is loaded in a porous alkaline-proof metal body.

Abstract: In a paste-type nickel electrode using nickel hydroxide powder controlled to under 0.1 ml/g incl. as an active material so as to be increased in its density, a nickel electrode for alkaline battery in which II-group elements and cobalt are included in the nickel hydroxide powder in solid solution state, so that swelling of electrode can be prevented and charge efficiency at a high temperature can be improved.

Abstract: A nickel electrode for use in an alkaline battery using a network-like alkaline-proof metal mesh having pores at the inside thereof as a core metal current collector, as well as an alkaline battery using such a nickel electrode. Inexpensive nickel electrode having high performance, great capacity can be obtained at high productivity.

Abstract: A nickel electrode for an alkaline battery comprises a porous alkaline-proof metal fiber substrate used as a current collector, and active material for the electrode. The active material includes nickel hydroxide powder active material, to which zinc or magnesium is added at a rate in a range of 3-10 wt % or 1-3 wt %, respectively. The zinc and magnesium is in a solid solution in crystal of the nickel hydroxide, and the active material forms principle compound of paste, which is loaded in the electrode.

Abstract: A nickel electrode for an alkaline battery includes a porous alkali-proof metal fiber substrate as a current collector and an active material principally formed of a nickel hydroxide powder is precluded from formation of the higher oxide, .gamma.-NiOOH, is improved in the ratio of utilization of the active material, and is provided with a high energy density and a long service life when the nickel hydroxide powder employed therein possesses a pore radius in the range of 15 to 30 .ANG., a total pore volume of not more than 0.05 ml/g, and a specific surface area in the range of 15 to 30 m.sup.2 /g. An alkaline battery is also provided by the invention which uses the nickel electrode described above.

Abstract: A nickel electrode for an alkaline battery comprises a porous alkaline-proof metal fiber substrate used as a current collector, and active material for the electrode. The active material includes nickel hydroxide powder active material, to which zinc or magnesium is added at a rate in a range of .[.3.]..Iadd.1.Iaddend.-10 wt % or 1-3 wt %, respectively. The zinc and magnesium is in a solid solution in crystal of the nickel hydroxide, and the active material forms principle compound of paste, which is loaded in the electrode.