Abstract: A hybrid power supply unit, comprises a high-capacity nonaqueous electrolyte battery group and a high-power nonaqueous electrolyte battery group different in discharge characteristics connected to each other in parallel. The high-capacity nonaqueous electrolyte battery group has a 0.2 C discharge capacity per cell greater than that of the high-power nonaqueous electrolyte battery group, and the high-power nonaqueous electrolyte battery group has a rate of 5 C discharge capacity per cell to 0.2 C discharge capacity per cell (5 C discharge capacity/0.2 C discharge capacity) greater than that of the high-capacity nonaqueous electrolyte battery group.

Abstract: An alkaline storage battery including a strip-shaped porous metal substrate and a material mixture filled into the substrate. The substrate has an unfilled portion where the material mixture is not filled along at least one of two longitudinal sides of the substrate. The substrate has a weight per unit area of 150 to 350 g/m2. The material mixture contains an active material and an elastic polymer.

Abstract: An alkaline storage battery including a strip-shaped porous metal substrate and a material mixture filled into the substrate. The substrate has an unfilled portion where the material mixture is not filled along at least one of two longitudinal sides of the substrate. The substrate has a weight per unit area of 150 to 350 g/m2. The material mixture contains an active material and an elastic polymer.

Abstract: An alkaline storage battery including a strip-shaped porous metal substrate and a material mixture filled into the substrate. The substrate has an unfilled portion where the material mixture is not filled along at least one of two longitudinal sides of the substrate. The substrate has a weight per unit area of 150 to 350 g/m2. The material mixture contains an active material and an elastic polymer.

Abstract: A hybrid power supply unit, comprises a high-capacity nonaqueous electrolyte battery group and a high-power nonaqueous electrolyte battery group different in discharge characteristics connected to each other in parallel. The high-capacity nonaqueous electrolyte battery group has a 0.2 C discharge capacity per cell greater than that of the high-power nonaqueous electrolyte battery group, and the high-power nonaqueous electrolyte battery group has a rate of 5 C discharge capacity per cell to 0.2 C discharge capacity per cell (5 C discharge capacity/0.2 C discharge capacity) greater than that of the high-capacity nonaqueous electrolyte battery group.

Abstract: A method of manufacturing an electrode for an alkaline storage battery, including a process of manufacturing a porous metal plate. A method of manufacturing this porous metal plate includes adding a predetermined organic substance to a urethane sponge or coating a foamed urethane sponge with polyethylene terephthalate. Furthermore, the method includes grinding the urethane sponge or rolling the urethane sponge using a roll press.

Abstract: An alkaline storage battery including a strip-shaped porous metal substrate and a material mixture filled into the substrate. The substrate has an unfilled portion where the material mixture is not filled along at least one of two longitudinal sides of the substrate. The substrate has a weight per unit area of 150 to 350 g/m2. The material mixture contains an active material and an elastic polymer.

Abstract: An alkaline storage battery comprising an electrode assembly housed in a vessel, said electrode assembly comprising a positive electrode plate obtained by filling an active material comprising nickel hydroxide as the principal component into a metallic porous body substrate having three-dimensionally continuous space, followed by pressing, and a negative electrode plate which are opposed to each other with a separator placed therebetween, wherein said positive electrode plate used has been prepared by filling the active material into a plurality of the substrates and then placing at least two of the resulting positive electrode plates one upon another and pressing them to give a single positive electrode plate.

Abstract: A battery used by rolling a pole plate, formed by filling an active material, around a substrate using a band-shaped metal porous body having three-dimensionally linked spaces is inferior in flexibility and likely to short-circuit. According to this invention, grooves are formed in active material-filled substrate filled with the above active material, and then the grooved substrate is pressed flat to form groove active material layers, whereby cracks are made in the bottoms of the grooves preferentially, and cracks are pressed by the groove active material layers and blocked to prevent the flow-out of swelled projections of the cracks and the active material. Accordingly, a higher-capacity and higher-reliability battery is provided.

Abstract: An electrode group fabricated by spirally winding a positive plate and a negative plate with a separator interposed between them is housed in a metal case. An upper opening of the metal case is hermetically sealed with a gasket. One side edge along the longitudinal direction of the negative plate projects out downward of the electrode plate and is joined to the bottom of the metal case while the side edge along the longitudinal direction of the positive plate projects out upward of the electrode group and is joined to the lower surface of a sealing plate. A metal current collector having a cap-shaped terminal for joining the positive electrode side and the lower surface of the sealing plate and for collecting current is welded to the protrusion of the positive plate, and the metal current collector having a cap-shaped terminal is provided with a gas venting mechanism.

Abstract: A method of manufacturing an electrode for alkaline storage battery including a process of manufacturing a porous metal plate. A method of manufacturing this porous metal plate includes a step of adding a predetermined organic substance to urethane sponge or a step of coating foamed urethane sponge with polyethylene terephthalate. Furthermore, the method includes a step of grinding the urethane sponge or rolling the urethane sponge using a roll press.

Abstract: An alkaline storage battery comprising an electrode assembly housed in a vessel, said electrode assembly comprising a positive electrode plate obtained by filling an active material comprising nickel hydroxide as the principal component into a metallic porous body substrate having three-dimensionally continuous space, followed by pressing, and a negative electrode plate which are opposed to each other with a separator placed therebetween, wherein said positive electrode plate used has been prepared by filling the active material into a plurality of the substrates and then placing at least two of the resulting positive electrode plates one upon another and pressing them to give a single positive electrode plate.

Abstract: According to the present invention, an inexpensive iron sintered substrate used for alkaline storage batteries which has three-dimensionally intercommunicating spaces is improved, and inexpensive alkaline storage batteries using the substrate are provided. The electrode used for the alkaline storage batteries includes an iron powder sintered substrate having three-dimensionally intercommunicating spaces and plated with nickel and an active material powder filled in the space of the substrate, wherein an oxide film obtained by previously oxidizing iron per se is formed on the surface portions of the substrate which are not plated with nickel.

Abstract: A battery having a stable internal resistance with a small deviation of internal resistance, and capable of suppressing a change or elevation of internal resistance due to external impact is provided. The battery comprises a battery can having a conductivity, serving also as a negative terminal, and including an opening, a spiral electrode group disposed in the battery can, a positive plate and a negative plate wound around a separator, an electrolyte member disposed in the battery can, and a sealing member serving also as a positive terminal, disposed in the opening of the battery can through an electric insulating member. In the inner wall of the battery can, contacting with the negative electrode positioned on the outermost circumference of the plate group, plural linear bumps vertical to the bottom of the battery can are formed. The height of each linear bump of the plural linear bumps ranges from 0.05 mm to 0.25 mm, and the pitch of the linear bumps ranges from 0.5 mm to 10 mm.