Gs Yuasa International Ltd.

National Institute of Advanced Industrial Science and Technology

Xiamen Tungsten Co., Ltd.

Manabu Kanemoto

Tadashi Kakeya

Mitsuhiro Kodama

Tetsuya Ozaki

Masaharu Watada

Minoru Kuzuhara

Tetsuo Sakai

Daisuke Okuda

Hideto Watanabe

Toshiyuki Nukuda

Masanori Morishita

Seijiro Ochiai

Zhen Lin

Peng Zhang

Yoshiteru Kawabe

Jinhong Yang

Masaki Miiyamoto

Wenlian Qian

Kaori Nishiyabu

Long Jiang

A layered electrode group according to the present invention includes a positive electrode plate, a negative electrode plate, and a separator. The positive electrode plate is formed into a substantial U-shape by disposing two active material retaining portions retaining the positive active material opposite to each other. The negative electrode plate is formed into a substantial U-shape by disposing two active material retaining portions retaining the negative active material opposite to each other. The positive electrode plate and the negative electrode plate are layered such that at least one active material retaining portion at the positive electrode plate is sandwiched between two active material retaining portions at the negative electrode plate.

Electrode plate, layered electrode group, and battery

Provided is a hydrogen storing alloy represented by the general formula:

Hydrogen storing alloy, electrode, and nickel-hydrogen storage battery

A cylindrical battery includes a cylindrical battery case and a cylindrical electrode assembly arranged in the battery case and including a positive electrode, a negative electrode, and a separator. The electrode assembly has a slit extending from a first axial end to a second axial end.

Cylindrical battery and battery electrode structure

This disclosure provides a hydrogen storing alloy and a production method thereof. The hydrogen storing alloy has a chemical composition of a general formula RMgNi, wherein R is one or more elements selected from rare earth elements comprising Y, x satisfies 0.05&#x2264;x&#x2264;0.3, and y satisfies 2.8&#x2264;y&#x2264;3.8. The ratio of the maximal peak intensity present in a range of 2&#x3b8;=31&#xb0;-33&#xb0; to the maximal peak intensity present in a range of 2&#x3b8;=41&#xb0;-44&#xb0; is 0.1 or less (including 0), as measured by X-ray diffraction in which a Cu&#x2014;K&#x3b1; ray is set as an X-ray source.

Hydrogen storing alloy and production method thereof

An alkaline storage battery includes a spiral electrode group with a positive plate and a negative plate spirally wound with a separator interposed therebetween. The separator includes a plurality of sulfone group-containing regions. The plurality of sulfone group-containing regions are separated from one another in a winding direction, and disposed to face the positive plate or the negative plate.

Alkaline storage battery, and method for producing alkaline storage battery

Provided is a hydrogen storage alloy which is characterized in that two or more crystal phases having different crystal structures are layered in a c-axis direction of the crystal structures. The hydrogen storage alloy is further characterized in that a difference between a maximum value and a minimum value of a lattice constant a in the crystal structures of the laminated two or more crystal phases is 0.03 &#x212b; or less.

Hydrogen storage alloy, hydrogen storage alloy electrode, secondary battery, and method for producing hydrogen storage alloy

A rubber valve body for sealed battery includes a rubber composition containing a resin in an amount of 20% by mass or more and an inorganic substance, wherein the melting point of the resin is in a range of 100 to 165&#xb0; C.

Rubber valve body for sealed battery, safety valve device and alkaline storage battery

Disclosed is a negative electrode for an alkaline secondary battery, which can suppress elution of iron to improve the long-period storage property of the battery capacity even under conditions in which elution of iron in a substrate into an electrolyte solution tends to occur, and which can also suppress lowering of initial capacity and increase in internal resistance. Even under conditions in which the elution of iron in the substrate into an electrolyte solution tends to occur, including a case where there is a thin conductive protecting layer at the surface or where the conductive protecting layer has defects, by adding magnesium or a magnesium compound to the negative electrode for an alkaline secondary battery (excluding the case where magnesium is contained as a constituent element of a hydrogen storage alloy), the elution of iron can be suppressed, and thereby, the long-period storage property of the battery capacity can be improved and the lowering of the initial capacity and the increase in internal resistance can be suppressed.

Negative electrode for alkaline secondary battery, outer case for alkaline secondary battery and alkaline secondary battery

A battery includes a cylindrical battery case and an electrode group including a positive electrode, a negative electrode, and a separator. The electrode group and the battery case define a space communicated from a top to a bottom, and one of the positive electrode and the negative electrode has a current collecting terminal that extends from the electrode group in a direction away from a center axis of the battery case and is in contact with a bottom surface of the battery case.

Cylindrical battery

A nickel hydroxide for an alkaline secondary battery, wherein the nickel hydroxide contains &#x3b1;-nickel hydroxide particles and &#x3b2;-nickel hydroxide particles, and the ratio of the &#x3b2;-nickel hydroxide to the total amount of the nickel hydroxide is less than 75% by mass.

Nickel hydroxide for alkaline secondary battery and alkaline secondary battery

A battery includes: a cylindrical battery case; and an electrode body disposed in the battery case, and including a positive plate, a negative plate, and a separator disposed between the positive plate and the negative plate. A spacer formed of a dense body and an electrolyte storage space storing an electrolyte are provided between the electrode body and the battery case on one end or both ends of the battery case in an axial direction of the electrode body.

Battery

It is an object of the present invention to improve the cycle performance in a nickel-metal hydride battery using a rare earth-Mg&#x2014;Ni type alloy. The present invention provides a nickel-metal hydride battery having a negative electrode including an La&#x2014;Mg&#x2014;Ni based hydrogen absorbing alloy, wherein the hydrogen absorbing alloy has a crystal phase having GdCotype crystal structure and contains calcium.

Nickel-metal hydride battery and method for producing hydrogen storage alloy

An energy storage device including: a cylindrical case having at least one end closed; and an electrode assembly housed in the case. A reduced-diameter portion, at which an outer diameter of the case is reduced, is formed at the closed end of the case.

Energy storage device and manufacturing method of the same

An energy storage device including a spiral electrode group in which a first electrode plate and a second electrode plate having polarity reverse to that of the first electrode plate are spirally wound with a separator interposed therebetween, wherein the second electrode plate is opposed to an inner circumference and an outer circumference of the first electrode plate, portions of the separator are reinforced, the reinforced portions of the separator include a first reinforced portion formed between a winding-start end of the first electrode plate and the second electrode plate located on a radially outer side of the winding-start end, and a second reinforced portion formed between the winding-start end of the first electrode plate and the second electrode plate located on a radially inner side of the winding-start end, and the first reinforced portion and the second reinforced portion are arranged apart from each other.

Energy storage device including spiral electrode group with reinforced separator

An electrode plate is configured by applying an active material onto a base member formed of a punching steel plate, the electrode plate being wound via a separator together with an electrode plate, which has a different polarity, and having an outermost peripheral portion positioned at the outermost periphery of an electrode assembly. The rate of hole area of the base member at a different electrode overlapping portion, which radially inwardly overlaps on a winding terminal end of the electrode plate having the different polarity, is smaller than that of the base member at the outermost peripheral portion.

Growing community of inventors

Kyoto, Japan

Manabu Kanemoto