Abstract: A method for bonding a current collector to an electrode body is provided. The electrode body includes electrode plate end portions arranged over each other in a thickness direction. The method includes forming a covering by integrally covering the electrode plate end portions with resin at a bonding position of the current collector, and bonding a bonding portion of the current collector, by performing solid-phase bonding, to edges of the electrode plate end portions integrated by the formed covering.

Abstract: A method for joining a current collector includes (1) providing an electrode body that includes electrode plate end portions overlapping each other in a thickness-wise direction of the electrode plate end portions, (2) providing a current collector including a folded portion, where the folded portion includes two opposing holding walls that hold the electrode plate end portions of the electrode body in between, and a top part that connects the two holding walls and includes an opening, and (3) brazing edges of the electrode plate end portions, exposed from the opening of the top part, to the two holding walls to join the current collector to the electrode body.

Abstract: A joining method includes providing an electrode body that includes electrode plate end portions overlapping each other in a thickness-wise direction of the electrode plate end portions; providing a current collector including a folded portion, the folded portion includes two opposing holding walls that hold the electrode plate end portions of the electrode body in between, and a top portion that connects the two holding walls and includes an opening; and welding the electrode plate end portions to end surfaces of the two holding walls that define the opening by irradiating an edge of the electrode plate end portions with a laser beam in a state in which the edge of the electrode plate end portions held between the two holding walls projects into the opening.

Abstract: A secondary battery manufacturing method according to an example embodiment of the present disclosure includes an electromagnetic welding step of joining together a first metallic component and a second metallic component included in the secondary battery by electromagnetic welding, and a laser welding step of applying laser light to weld an unjoined part of the first metallic component and the second metallic component, the unjoined part being not joined by the electromagnetic welding step.

Abstract: A manufacturing method for a secondary battery and a manufacturing apparatus for a secondary battery that are applicable to a secondary battery in which an electrolyte solution injection hole has a diameter of 1.5 mm or more are provided. The secondary battery includes a battery case including a cover plate provided with an electrolyte solution injection hole, and a sealing member sealing the electrolyte solution injection hole. The manufacturing method includes a preparing step and a press-fitting step. The preparing step is preparing a cell in which, after an electrolyte solution is injected to the battery case through the electrolyte solution injection hole, the sealing member is disposed on the electrolyte solution injection hole. The press-fitting step is press-fitting the sealing member into the electrolyte solution injection hole while applying press-fitting load and ultrasonic vibration with a frequency of 20 kHz or more in parallel to a press-fitting direction.

Abstract: A lithium-ion rechargeable battery includes a current collector terminal and a negative terminal unit connected to the current collector terminal. The negative terminal unit is configured to conduct electricity from an inside to an outside of a battery case. The negative terminal unit is formed of copper (Cu) or its alloy and includes a fixing member fixing the battery case to the current collector terminal. The battery is manufactured by ultrasonically bonding an external terminal formed of aluminum (Al) or its alloy to the top of a negative fixing member, fitting a busbar to a negative external terminal, and laser-welding the busbar to the negative external terminal and using the welding heat to heat the external terminal that has undergone the ultrasonic bonding to form a diffusion-bonded portion and an intermolecular-bonded portion in a bonded surface of the external terminal and the negative fixing member. Thus, conductivity is increased.

Abstract: A manufacturing method for a secondary battery and a manufacturing apparatus for a secondary battery that are applicable to a secondary battery in which an electrolyte solution injection hole has a diameter of 1.5 mm or more are provided. The secondary battery includes a battery case including a cover plate provided with an electrolyte solution injection hole, and a sealing member sealing the electrolyte solution injection hole. The manufacturing method includes a preparing step and a press-fitting step. The preparing step is preparing a cell in which, after an electrolyte solution is injected to the battery case through the electrolyte solution injection hole, the sealing member is disposed on the electrolyte solution injection hole. The press-fitting step is press-fitting the sealing member into the electrolyte solution injection hole while applying press-fitting load and ultrasonic vibration with a frequency of 20 kHz or more in parallel to a press-fitting direction.

Abstract: A welding mode determination device that determines a welding mode when laser beam welding is performed includes an obtaining unit that obtains an image in an infrared wavelength region and an image in a short wavelength region of visible light from a laser irradiation area and its vicinity. An extraction unit extracts a light emitting image from the image in the infrared wavelength region and a light emitting image from the image in the short wavelength region of visible light. A determination unit compares the light emitting image of the image in the infrared wavelength region and the light emitting image of the image in the short wavelength region of visible light and determines the welding mode when the laser beam welding is performed based on a comparison result.

Abstract: A laser welding device that laser-welds a lid to an open portion of a casing emits a laser beam to a joining subject portion including an inner side surface of the casing that defines the open portion and a peripheral surface of the lid that faces the inner side surface of the casing. The inner side surface of the casing and the peripheral surface of the lid are arranged to form a groove in between, and include inclined surfaces that function as a sliding portion. The groove portion has a groove width that is variable by sliding the sliding portion. A detection unit detects the groove width of the groove portion. An adjustment force application unit applies force for adjusting the groove width to the casing. A control unit controls the force applied by the adjustment force application unit in accordance with the groove width detected by the detection unit.

Abstract: A laser welding device that laser-welds a lid to an open portion of a casing emits a laser beam to a joining subject portion including an inner side surface of the casing that defines the open portion and a peripheral surface of the lid that faces the inner side surface of the casing. The inner side surface of the casing and the peripheral surface of the lid are arranged to form a groove in between, and include inclined surfaces that function as a sliding portion. The groove portion has a groove width that is variable by sliding the sliding portion. A detection unit detects the groove width of the groove portion. An adjustment force application unit applies force for adjusting the groove width to the casing. A control unit controls the force applied by the adjustment force application unit in accordance with the groove width detected by the detection unit.

Abstract: A welding mode determination device that determines a welding mode when laser beam welding is performed includes an obtaining unit that obtains an image in an infrared wavelength region and an image in a short wavelength region of visible light from a laser irradiation area and its vicinity. An extraction unit extracts a light emitting image from the image in the infrared wavelength region and a light emitting image from the image in the short wavelength region of visible light. A determination unit compares the light emitting image of the image in the infrared wavelength region and the light emitting image of the image in the short wavelength region of visible light and determines the welding mode when the laser beam welding is performed based on a comparison result.

Abstract: The invention relates to a polyethylene resin having excellent slow crack growth property, in particular a resin having excellent durability in a pipe application, which has a specific (a) high-load melt flowrate (HLMFR; HLa), a specific (b) density (Da), and a specific (c) ?-olefin content (Ca) and in which (d) a breaking time (T) measured by notched Lander ESCR, the HLa, and the Ca satisfy log T??2.9×log HLa+5.1×log Ca+6.8. It further relates to a process for producing the resin and to a pipe and a joint each comprising the resin.

Abstract: Provided is a welding method which can improve the joint strength while enabling simplification of the welding processing. It is a welding method for joining a plurality of members to one another by fusion welding, comprising the steps of: abutting a joint area of another member to a member having a substantially plate-type part as a joint area; and applying welding processing by using a prescribed welding device from a face of the substantially plate-type part opposite to the one onto which another member is abutted for melting the substantially plate-type part to join each member to one another.

Abstract: A blow-moldable or extrudable ethylene polymer having an excellent moldability which gives a molded product free of roughened surface, having: a number-average molecular weight Mn (V1) as determined from the amount of a terminal vinyl group by .sup.13 C-NMR measurement with respect to a fraction having a number-average molecular weight Mn of 100,000 according to GPC; and a number-average molecular weight Mn (V2) as determined from the amount of a terminal vinyl group by .sup.13 C-NMR measurement with respect to a fraction having a number-average molecular weight Mn of 10,000 according to GPC, Mn(V1) and Mn(V2) satisfying the following relationship:1.01.ltoreq.log.sub.10 {Mn(V1)/Mn(V2)}.ltoreq.3.0and having a melt flow rate (HLMFR) of from 0.1 to 70 g/10 min.

Abstract: A laser welding apparatus 10 according to the present invention comprises: a laser output mechanism 1 for applying a welding laser beam from its output end to a welding position of an object to be welded; and a plurality of jet nozzles for blowing out a shield gas to the welding position for preventing oxidation of the welding position, wherein the jet nozzles are arranged at an identical angle interval on a single circumference H around the welding laser beam. This enables to perform welding into a sufficient depth and width.

Abstract: A method for removing coating defects from a vehicle body or the like includes the steps of putting a defect information mark on a defect portion of an inspected object's coating, recognizing a position and a removal setting of the defect portion from the defect information mark, and non-contact removal of the defect portion in accordance with the position and the removal setting recognized in the recognizing step. According to the present invention, only the defects are removed, even when they are very small. The non-contact removal step may include spraying a water jet to permit removal of a defect without damaging a base coat. The non-contact removal step is very straightforward. Therefore, the removal position need not be defined in three dimensions. Accordingly, the shape of the vehicle body or the like is not required to be input.

Abstract: A digital demodulator wherein a phase difference is detected between a reference signal and an angle-modulated wave, the difference in frequency is detected between the angle-modulated carrier wave and the reference signal based on the phase difference, and the phase of the reference signal to be set is controlled based on the phase and frequency difference. That is, the detection of the angle-modulated wave, the detection of the phase and frequency differences, and the phase control are performed using digital circuits. Therefore, excellent error rate is exhibited under noise and fading conditions, and it is possible to realize a small-sized low-cost demodulator which requires lower power and no adjustment.

Abstract: A frequency division scheme which offsets for a phase lag produced on initial power-on is described. A division ratio of a programmable counter is initially set at a first division ratio at the time of releasing the programmable counter from its reset state. When the first division cycle is complete, the division ratio is reset to its steady state value. Thus, a delay equivalent to the phase lag is produced. A frequency synthesizer is also proposed where the division ratio is set, and a phase difference is detected. Reset signals are continually set while the phase difference is changed. This cycle is continued until the phase difference is reduced to one cycle of the input signals or less.

Abstract: In the diversity receiver which switches between receiver branches to receive phase modulated signals, this invention can achieve a diversity effect with a circuit of simple construction which by switching between receiver branches based on relative modulation phase error, and can attain diversity effect not only against fading but also against any factor which might affect the transmission lines.

Abstract: A turbo-charger with a rotor directly connected thereto has a turbine impeller, a turbine shaft secured to the turbine impeller and a compressor secured to the turbine shaft and driven thereby to forcibly feed air into an internal combustion engine. The rotor is provided on the turbine shaft and so structured as to prevent the occurrence of an unbalanced condition during rotation of the turbine shaft.