Sony Corporation

Toshiba Lighting & Technology Corporation

Kabushiki Kaisha Toshiba

Kazuo Honda

Hisanori Sano

Atsushi Matsuura

Shinji Inukai

Osamu Takahashi

Kenta Yamamoto

Kuniyasu Oya

Hiromichi Kawashima

Yasuki Mori

Mamoru Furuya

Hiroyuki Yamada

Masato Doi

Kazuhito Hatta

Masakazu Ukita

Shoji Hirata

Chiaki Kojima

Tsuyoshi Sugiyama

Takeru Yamamoto

Akihiro Kamiya

Akira Sanpei

Takayuki Aita

Masato Sato

Masakazu Shibuya

Norio Mamada

Youichiro Mitsuyuki

Hiroshi Ogata

Koji Sakai

A battery pack is provided. The battery pack includes: a generator device having a battery element disposed on a flexible covering material folded to cover the battery element, wherein three sides of the flexible covering material around the battery element are sealed; a rigid covering material for covering the generator device, having an opening and being bonded to the flexible covering material of the generator device; and a cover fitted into the opening of the rigid covering material, wherein the rigid covering material has a three-layer structure having an outer packaging layer, a metal layer, and a heat-bonding layer which are stacked on one another, and the heat-bonding layer is one selected from an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer, an ethyl acrylate copolymer, a methyl acrylate copolymer, a methacrylic acid copolymer, a methyl methacrylate copolymer, polyacrylonitrile, an ethylene vinyl alcohol resin, a polyamide resin, a polyester resin, acid-modified polypropylene, or an ionomer.

Battery pack

The present invention provides a nickel-zinc battery of an inside-out structure, that is, a battery comprising a positive electrode containing beta-type nickel oxyhydroxide and a negative electrode containing zinc and having a similar structure to an alkali manganese battery, in which the beta-type nickel oxyhydroxide consists of substantially spherical particles, mean particle size of which is within a range from 19 &#x3bc;m to a maximum of 40 &#x3bc;m, the bulk density of which is within a range from 1.6 g/cmto a maximum of 2.2 g/cm, tap density of which is within a range from 2.2 g/cmto a maximum of 2.7 g/cm, specific surface area which based on BET method is within a range from 3 m/g to a maximum of 50 m/g, and the positive electrode of the nickel zinc battery contains graphite powder, where the weight ratio of graphite powder against a total weight of the positive electrode is defined within a range from 4% to a maximum of 8%.

Positive electrode material and nickel-zinc battery

The present invention provides a nickel-zinc battery of an inside-out structure, that is, a battery comprising a positive electrode containing beta-type nickel oxyhydroxide and a negative electrode containing zinc and having a similar structure to an alkali manganese battery, in which the beta-type nickel oxyhydroxide consists of substantially spherical particles, mean particle size of which is within a range from 19 &mgr;m to a maximum of 40 &mgr;m, the bulk density of which is within a range from 1.6 g/cm to a maximum of 2.2 g/cm , tap density of which is within a range from 2.2 g/cm to a maximum of 2.7 g/cm , specific surface area which based on BET method is within a range from 3 m /g to a maximum of 50 m /g, and the positive electrode of the nickel zinc battery contains graphite powder, where the weight ratio of graphite powder against a total weight of the positive electrode is defined within a range from 4% to a maximum of 8%.

A laser apparatus capable of suppressing an influence of return light with respect to an optical output without causing an increase of a number of parts, an enlargement of the entire apparatus, or an increase of a power consumption, including a semiconductor laser having an optical resonator provided with a pair of opposing reflection mirrors, in which a resonator length is set to L , constituted so as to obtain a constant optical output from the optical resonator under constant drive conditions, and set so that reflectivities R and R of the reflection mirrors absorb a change of an output light intensity due to a change of the phase of the return light.

Laser apparatus

For the sake of reducing the number of parts and simplifying adjustment for the optical positions of the parts in an optical device wherein information signals from the light scattered or diffracted which is derived from an optical recording medium are detected, there is provided the optical device of the invention comprising a semiconductor substrate provided with a plane light emitting laser element and a photodiode; and an optical system; a layout position of the photodiode being selected in a region which extends out of the confocal region of the optical system, and from which the light scattered or diffracted from a section irradiated with laser light irradiation derived from the plane light emitting laser element with respect to the section to be irradiated.

Optical device comprising a photodetector for detecting light scattered

High intensity spotlight

A metal vapor discharge lamp has a small arc tube of a single end type. The maximum and minimum thicknesses of the wall of the arc tube and the ratio of the minimum thickness to the maximum thickness are set to the values in predetermined ranges. The set thicknesses prevents breakage of the arc tube and deterioration of the lamp characteristics.

Metal vapor discharge lamp having single end arc tube of predetermined

A single-sealed metal-vapor discharge lamp forms a press sealed portion on one end to seal in a discharge space starting noble gas, light emission metal, and mercury. The discharge lamp has a pair of electrodes with bent portions whose tip ends are bent opposite to each other in the discharge space; a pair of inner metallic foil conductors, to each one end of which the proximal ends of the electrodes are joined; and an arc tube enclosing a pair of internal lead wires, each one end of which is joined to the other end of the inner metallic foil conductors. The electrodes which are arranged approximately parallel in the arc tube. A bend angle .theta. of the bent portions arc is 60.degree..ltoreq..theta..ltoreq.120.degree., and the curvature radius R of the periphery of the bent portions is approximately R.gtoreq.1.2d (where, d is wire diameter of the electrode rod).

Single-sealed metal vapor electric discharge lamp

A prescribed amount of tin halide is sealed in the arc tube of a metal halide lamp wherein a given amount of metal halide including a target amount of halogen and at least a predetermined amount of rare earth metal is sealed in the arc tube thereof to maintain a high lumen maintenance factor for an extended operation period. The prescribed amount of tin halide is preferably within 4.6.about.234 mol % of the predetermined amount of rare earth metal.

Metal halide lamp maintaining a high lumen maintenance factor over an

A device for detecting and displaying residual capacity of a battery comprises a comparator comparing detection voltages set to predetermined values and open circuit voltage. The device further contains circuitry to compensate the difference of the open circuit voltage and the closed circuit voltage of the battery. Thus the device can detect the residual capacity of the battery under conditions both with and without the external load.

Device for detecting residual capacity of a battery both in load and no

A single side-sealed metal vapor discharge lamp is disclosed which includes a discharge tube having a sealed section at one end and a discharge region defining envelope at the other end, a pair of metal foils sealed at the sealed section and a pair of electrodes, the discharge region of the discharge tube containing a rare gas for starting and a filled gas containing mercury and light emitting metal. The electrodes are each comprised of a rod connected to the metal foil and a coil of at least one turn mounted on the forward end portion of a bent end portion of the rod, the coils being oppositely spaced apart by a predetermined distance in the discharge region. The coil is formed of a higher melting point material than a surface material of the forward end portion of the bent portion of the rod. With the length from the bent portion to the forward end of the rod indicated by L1, the length of the coil by L2 and the wire diameter of the coil by d, the following inequalities are satisfied: L1.ltoreq.3d and d/2.ltoreq.L2-L1.ltoreq.3d. According to the lamp, it is possible to firmly mount the coil on the corresponding rod, to reduce less scattering of a material of which the electrode is made, to prevent blackening on the tube wall, to obtain a better starting characteristic and to enhance a lumen maintenance factor.

Single side-sealed metal vapor discharge lamp

A single end-sealed type metal vapor discharge lamp includes an arc tube having a bulb made up of a discharge portion defining a discharge region and a sealing portion with a shoulder portion situated adjacent to the discharge portion. A pair of electrodes have a pair of mutually opposite electrode portions on an upper end of each of the pair, the electrodes extending from the sealing portion toward the discharge region. An outer tube encloses the arc tube in which a cross-sectional configuration of the bulb has a point of inflection at a boundary between the discharge portion and the sealing portion. A straight line l connecting a center of one electrode portion to that of the other electrode potion makes an angle of 15.degree.-45.degree. with respect to a straight line L connecting the point of inflection to a midpoint of the straight line l. The shoulder portion is located at a side opposite to that, on which the straight line l exists with the straight line L as a reference.

Metal vapor discharge lamp containing an arc tube with particular bulb

A metal vapor discharge lamp has an envelope formed of a vitreous high temperature resistant material. A pair of electrodes each has a metal rod and an arc supporting electrode. The metal rods are sealed at one end of the envelope. The envelope is filled with a starting gas and a charge. The present invention also includes insulating films formed on the envelope behind the arc supporting electrodes to increase the vapor pressure of the charge, and improve output and the spectral color distribution.

Single ended metal vapor discharge lamp with insulating film

An arc tube bulb comprises a sealed portion formed at one end of the bulb and an enclosure portion formed at the other end to surround a discharge space. A pair of metal foils are buried in the sealed portion. A rare gas for start-up, mercury and a metal halide are charged in the discharged space. A pair of electrodes comprise a pair of electrode rods connected to the metal foils and coils disposed at the tips of the rods. These coils are positioned within the discharge space apart from each other and facing each other. The lamp is lit when the value of the input power WL (watt) divided by the inner surface area S (cm.sup.2) of the discharge space falls within the range of between 20 and 70, i.e., 20.ltoreq.WL/S.ltoreq.70. The surface region of the electrode rods is formed of a pure rhenium metal or a rhenium-tungsten alloy. Since the pure rhenium metal or rhenium-tungsten alloy has a low thermal conductivity, the temperature elevation of the electrode rod can be suppressed in the single end-sealed metal halide lamp of the particular construction.

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Hiratsuka, Japan

Kazuo Honda