Nec Corporation

Kabushiki Kaisha Toshiba

Tsutomu Matsui

Kenichi Takahashi

Tatsuya Shinoda

Kengo Kurata

Hideyuki Ishii

Eiki Kashiwazaki

Yoshiaki Asami

Soichi Hanafusa

Yuki Fujimura

Haruchika Ishii

Natsuki Toyota

Shigeru Araki

Souichi Hanafusa

Tsutomu Kanetsuna

According to one embodiment, there is provided a battery. The battery includes a metallic outer can, a wound electrode group, a positive electrode-lead, a negative electrode-lead, a positive electrode insulating cover, and a negative electrode insulating cover.

Battery with wound electrode group and positive and negative electrode insulating covers

According to one embodiment, a battery includes an electrode group, a tab, a conductive nipping member, a case, a lid and a lead. The conductive nipping member includes first and second nipping sections. The first and second nipping sections divide the tab into two bundles in which portions of the tab are laminated onto each other in a thickness direction of the electrode group. The lead includes a connecting section connected electrically to a terminal, and current collecting sections which are two sections branched from the connecting section and sandwiching the nipping member.

Battery including branched current collector sections

In general, according to one embodiment, there is provided a battery. This battery includes a container, a lid, a gas-relief vent, an electrode group, an intermediate lead, and a terminal lead. The gas-relief vent is provided in the lid. The intermediate lead includes a first lead-joint part, an electrode-group-joint part, and a leg part. The leg part connects the first lead-joint part and the electrode-group-joint part to each other. The first lead-joint part and the electrode-group-joint part are located on planes different from each other.

Battery

According to one embodiment, a battery includes a case, an electrode group, a lid, an external terminal and an insulating member. The external terminal includes a head section and an axial section extended from the head section. The axial section is caulked and fixed into a through hole in the lid. The insulating member is arranged between the lid and the external terminal. The insulating member includes a bus bar-fixing section.

Battery with insulating member including bus bar fixing section

Battery comprising multiple insulating covers

In one embodiment, a battery includes an exterior can, an electrode group, a lid attached to an opening of the exterior can, and anode and cathode terminal portions arranged in the lid. At least one of the terminal portions includes an insulating gasket having a cylindrical portion, an external insulator having a pedestal portion, an external terminal including a head portion and the axial portion extended from the head portion, an electrode lead located in the exterior can and connected to the external terminal, and an internal insulator to isolate the lid and the electrode lead. The cylindrical portion of the external terminal is fixed to a through hole of the lid and an attachment hole of the electrode lead by a caulking. The insulating gasket is formed of a resin in which the melting point is higher than those of the internal insulator and the external insulator.

Battery comprising a conductive nipping member

An initializing apparatus includes a laser light source for emitting an erasing laser light for initializing an optical disk, a laser drive circuit for driving the laser light source according to an AC waveform signal, an optical system for irradiating the optical disk with the erasing laser light and track address detecting circuitry for detecting the track address. Furthermore, the laser light source, the laser drive circuit and the optical system are previously adjusted so that an amorphous portion having a size of &frac12; or less of a wavelength of the erasing laser light may be formed at the inside of a melting re-crystallization portion.

Phase change optical disk initializing apparatus

An optical disk apparatus of the present invention forms, in a first embodiment, two laser beams for erasure of data and irradiates the two laser beams from a single erasing head 102 so that focuses 207 and 208 thereof may be disposed on a same track of an optical disk 206. In order to construct the erasure head so as to provide two beams, either a two beam semiconductor laser 201 may be used or a beam from a semiconductor laser 215 may be divided into two beams. For the means for dividing the beam into two beams, a Wollaston polarizing prism 216, a Bragg diffraction grating 218, a Foucault prism 219 or some other suitable element can be used. Meanwhile, in a second embodiment, data are reproduced by an optical equivalence method using an optical disk 82, 100 or 206 of a phase change medium which exhibits a phase difference smaller than 180 degrees in reflected light therefrom based on recorded data. The phase difference preferably ranges from 120 degrees to 150 degrees. The phase difference can be made smaller than 180 degrees by adjusting the thickness of a protective film 12 on the light incidence side of the optical disk with respect to a phase change film 13.

Method for erasing rewritable optical disk using two laser beams

According to an astigmatic difference correcting method for an optical head, a rotational optical member which is arranged between a first laser beam source having an astigmatic difference and a collimator lens to be rotatable around an optical path of a laser beam of a first wavelength emitted from the first laser beam source is rotated and adjusted. Rotation and adjustment of the rotational optical member is caused to set a minimum difference between focal positions in an X-axis direction and in a Y-axis direction which are perpendicular to the optical path of the laser beam. The laser beam in which the difference between the focusing offset positions is minimum is irradiated on an optical disk having a recording density having a bit length not more than half a laser wavelength.

Astigmatic difference correcting method for optical head and apparatus

An optical recording medium is provided, this medium having a first substrate, onto the surface of which is formed a phase-change recording layer, and a second substrate, onto the surface of which is formed a magneto-optical recording layer, these layers being adhered to one another in a manner that causes their surface to be mutually opposing. By providing a means for selectively collecting laser light onto the phase-change recording layer and onto the magneto-optical recording layer, and selecting the output of either a differential amplifier or amplifier, to which are input the received-light outputs from light reflected from the optical recording medium, it is possible to perform access of both the phase-change recording layer and the magneto-optical recording layer, and to perform both recording and playbacking of information at high speed.

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Tokyo, Japan

Tsutomu Matsui