Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Sanyo Electric Co., Ltd.

Koji Funami

Seiji Kumazawa

Kyosuke Miyata

Kazumichi Shimizu

Yuji Uesugi

Yukio Nishikawa

Takahiro Fukuoka

Izuru Nakai

Takaaki Kassai

Toshiyuki Okada

Yukio Harima

Kazuki Fujiwara

Masaki Aoki

Junichi Hibino

Nobuaki Nagao

Atsushi Ueda

Masami Ito

Osamu Uchida

Kazumasa Takata

Masahiro Mori

Hiroyoshi Tanaka

Hiroshi Takasaki

Tomomi Tanaka

Yuusuke Takada

Yoshiro Kitamura

Shinya Mori

Kazuhiro Ikurumi

Shin Haraguchi

Seiichi Kato

Isamu Inoue

Yasuo Nishihara

Masashi Makino

Katsuhiro Kuriyama

Tsutomu Sakurai

Shigeyuki Mori

Masahiro Kuwabara

Ryunosuke Yokoo

Kota Shimizu

Yohei Takechi

Yosuke Kawahito

Sadahiro Hattori

Daisuke Shioga

Yusuke Tominaga

Shinya Hujiwara

Masazumi Adachi

Shota Ikeda

A laser welding quality inspection method of a welded portion between a joining object and a joined object, when the joining object and the joined object are welded by being irradiated with a laser beam, the method includes: acquiring first data indicating a signal intensity of thermal radiation light radiated from the welded portion during the welding; acquiring second data indicating a signal intensity of plasma light radiated from the welded portion during the welding; and determining whether or not the welded portion includes an abnormality based on a comparison between the signal intensity of the thermal radiation light and the signal intensity of the plasma light which are acquired.

Laser welding quality inspection method and laser welding quality inspection apparatus

The present disclosure includes a laser welding method in which a joint surface between a plurality of workpiece members is welded by radiating laser beam LB, and a locus of laser beam LB is controlled so as to perform wobbling scanning Sw by a combination of scanning motion Sa moving along first direction x parallel to the joint surface and swing motion Sb including first swing component Bx along first direction x and second swing component By along second direction y perpendicular to first direction x, the method including a defect determination step of determining occurrence of a welding defect; and an output control step of increasing or decreasing an output of laser beam LB when laser beam LB is radiated again toward the welding defect in a case where the welding defect occurs.

Laser welding method and apparatus

Provided is a laser processing method including overlapping a plurality of plate-shaped members that include a first plate-shaped member disposed on one end side of an overlapping direction and a second plate-shaped member disposed on the other end side of the overlapping direction; branching a laser beam into a first branched laser beam and a second branched laser beam; irradiating the first plate-shaped member with the first branched laser beam and the second branched laser beam in a state where the first branched laser beam and the second branched laser beam are emitted in parallel; forming line-shaped melting portions on the first plate-shaped member by moving the branched laser beams in a direction intersecting a direction in which the branched laser beams are aligned; and joining overlapped plate-shaped members in a state where the melting portion formed by using the first branched laser beam and the melting portion formed by using the second branched laser beam are connected to each other in the second plate-shaped member and the melting portions do not penetrate the second plate-shaped member.

Laser processing method and laser processing device and sealed type battery

An evaluation method for evaluating laser machining in which irradiation region of a laser beam is moved relative to object to perform machining of object, includes a measurement step and an evaluation step. In the measurement step, a change in an intensity of light according to a movement of measurement region is measured by moving measurement region for measuring the intensity of light, relative to object. In the evaluation step, an evaluation of the laser machining is performed based on the change in the intensity of light according to the movement of measurement region. In the measurement step, measurement region is moved relative to object so that movement path of measurement region has a plurality of intersections with movement path of irradiation region.

Evaluation method, evaluation system, and laser machining system

A cylindrical battery includes an electrode unit configured as a roll of a first electrode plate and a second electrode plate with a separator in between. The first electrode plate is an electrode plate to which one end of a first electrode tab and one end of a second electrode tab are connected, and the second electrode plate has the opposite polarity from the first electrode plate. Additionally, a case houses the electrode unit and a sealing member seals an opening rim of the case. The first electrode tab and the second electrode tab are disposed to project out from the first electrode plate at opposite ends of a winding axis of the first electrode plate. The first electrode tab contacts at a bottom portion of the case and the second electrode tab is welded at the opening rim side opposite the bottom portion of the case.

Cylindrical battery and method of manufacture thereof

A light source measurement apparatus includes an objective lens that collects light emitted from a light source having a plurality of light emission points, a first reflection attenuation filter, a second reflection attenuation filter, a condensing lens, a space filter, and a movable stage, in which the first reflection attenuation filter and the second reflection attenuation filter are disposed such that polarization directions are orthogonal to each other, in which the space filter has an opening through which light emitted from a measurement target light emission point among the plurality of light emission points is transmitted, and in which the opening has a shape in which a dimension of the measurement target light emission point in a fast direction is larger than a dimension of the measurement target light emission point in a slow direction.

Light source measurement apparatus

A sealed cell includes a bottomed cylindrical outer casing can. The outer casing can is formed by nickel-plated iron, and a lead connected to one of a positive electrode and a negative electrode, and the outer casing can, are welded by a welding part formed from the outside surface of the outer casing can toward the lead. The welding part is formed by molten traces and has a first layer and a second layer having a higher nickel concentration than the first layer. The first layer is formed from the lead through to the inside of the outer casing can, the second layer is formed so as to adjoin the first layer on the outside surface side of the outer casing can, and the whole of the first layer is covered with the second layer when the welding part is viewed from the outside of the outer casing can.

Sealed cell and method for manufacturing same

When a linear welding trace is formed by welding a battery case and an electrode tab, an output of the laser increases to a first output during a first period after laser irradiation start to melt the battery case until the electrode tab is melted with the first output, the first output is maintained during a second period to melt the electrode tab and the battery case, the output of the laser decreases from the first output to a second output for melting only the battery case, and the second output is maintained until formation of the welding trace is completed or the laser output is decreased from the second output by an amount that is less than the decrease amount when the laser output decreased from the first output to the second output.

Welded structure and manufacturing method thereof

A battery includes a power generation component including a positive electrode, a negative electrode, and an electrolyte, and a battery case accommodating the power generation component. The negative electrode includes a first lead () having a single layer structure whose main component is nickel, and a second lead () having a layered structure including a Ni layer () whose main component is nickel and a Cu layer () whose main component is copper. The battery includes a layered portion () formed of the leads that are superposed such that the Ni layer () of the second lead () faces the first lead (). Part of the layered portion () is welded to an inner surface of the battery case with the first lead () at the layered portion () being disposed on a battery case side.

Battery and method of manufacturing battery

A sealed battery including: an electrode groupformed by winding or stacking a positive electrode plateand a negative electrode platewith a separatorinterposed between the positive electrode plateand the negative electrode plate, and housed in a battery case, an opening of the battery casebeing sealed with a sealing plate, wherein a leadextending from one of the electrode plates in the electrode groupis laser-welded to the sealing plate, and a melting width of an end sectionof a welded portionbetween the leadand the sealing plateis smaller than a melting width of a center section of the welded portion

Hermetically sealed battery and method for manufacturing the same

A battery modulecontaining parallel blocksconnected to a protection circuit via a lead plate, wherein the parallel blocksare welded to both sides of the lead plate without bending the lead plateinto a U shape. Thus it is possible to reduce the length of the lead plateand suppress a voltage drop on the lead plate. Further, since the lead plateis not bent into a U shape, the assembling accuracy of the battery module is improved and the battery module is easily packaged with a small size.

Battery module and method of manufacturing the same

An electrode groupformed by stacking or winding a positive electrode plateand a negative electrode platewith a separatorinterposed therebetween, is housed in a battery case. An opening of the battery caseis sealed with a sealing plate. A leadextending from one of the positive and negative electrode plates in the electrode groupis laser-welded to the sealing plateby application of a laser beamhaving a spot diameter smaller than a thickness of the lead

Sealed secondary battery, and method for manufacturing the battery

A laser apparatus is provided which is capable of achieving deep penetration into an aluminum-like metal material without causing welding defects such as spatters or cracks and performing high-speed pulse seam welding. The laser apparatus includes a pulse power source that generates a current signal and a mask signal for masking a fluctuation component included in the current signal, and which supplies a current signal in which a fluctuation component has been masked by the mask signal to a YAG pulsed laser oscillator. In addition, the laser apparatus sets the spot shape of a CW laser light oscillated by a CW laser oscillator to a rhombic streamlined shape, and causes a focus spot of the CW laser light to include a circular focus spot of a pulsed laser light.

Laser apparatus and manufacturing method of a battery

A method for manufacturing an optical unit () having an optical element () and a support member () supporting the optical element. According to the method, at least one of the optical element () and the support member () is deformed, securing the optical element () and the support member () together.

Optical unit and its manufacturing method

Growing community of inventors

Kyoto, Japan

Koji Funami