The Furukawa Electric Co., Ltd.

Senju Metal Industry Co., Ltd.

Furukawa Automotive Systems Inc.

Kokusai Denshin Denwa Kabushiki Kaisha

Kokusai Denshin Denwa Co., Ltd.

Kddi R&d Laboratories, Inc.

International Mobile Satellite Organization

Kiddi Corporation

Shinichi Nomoto

Hiroshi Okada

Fumio Watanabe

Noriyasu Iwane

Dennis Roy Mullins

Yoshihiko Mizuguchi

Takashi Nauchi

Peter Poskett

Hideo Kobayashi

Koji Watanabe

Isamu Sato

Hiroyuki Yokoyama

Satoshi Konishi

Kazuo Hara

Akira Ohno

Hajime Nakamura

Etsuzo Sato

Naoya Takashima

Taiji Mitsuyama

Rikiya Kato

Koichi Yokoyama

Shinobu Nanba

Yoji Kishi

Tamas Mihalffy

Patrick Chomet

Antal Kovats

Teruhiko Honda

Samuel G Munoz-Garcia

Yutaka Chiba

Kazunori Takeuchi

Shoji Kaneko

Stephane Gosselin

Yukihiro Kamiya

Mamichi Tsuyuki

Isamu Satou

Ben Hutchinson

A state detecting method and device of a secondary battery correct impact resulting from state quantities caused by variation and calculate a state of charge with high accuracy. The state detecting method includes a first step of acquiring a detected voltage value and a detected current value, a second step of acquiring state quantities caused by variation such as a detected temperature value, a third step of determining if the detected voltage value is the voltage threshold value or greater, a fourth step of determining if the detected current value is the current threshold value or less, a fifth step of determining if a duration time of the current threshold value or less has elapsed a determination time, a sixth step of setting a state of charge in a reference state as the state of charge, and a seventh step of correcting the state of charge in the reference state.

State detecting method and state detecting device of secondary battery

A power supply apparatus is provided that has a plurality of secondary batteries connected in series, outputs a composite voltage of all of the secondary batteries, and outputs an output of a part of the secondary batteries as a partial voltage. The power supply apparatus includes a detecting unit that detects states of the secondary batteries, a changing unit that changes an order of series connection of the plurality of secondary batteries based on a detection result of the detecting unit in such a manner that the partial voltage is outputted from a secondary battery that is in a relatively good state.

Power supply apparatus and power supply method

To efficiently control charging and regenerative control for a secondary battery. A charge control device, including: a calculation unit (voltage sensor (), current sensor (), and control unit ()) that calculates a state of charge of the secondary battery; a detection unit (vehicle state detection unit ()) that detects a traveling state of the vehicle; and a control unit (control unit ()) that, when it is detected that the vehicle is decelerating, sets a voltage generated by an alternator higher than the terminal voltage of the secondary battery in order to regeneratively charge the secondary battery, that, when it is detected that that the vehicle is not decelerating, sets the voltage generated by the alternator lower than the terminal voltage of the secondary battery when a state of charge is greater than a prescribed second threshold value, and that sets the voltage generated by the alternator higher than the terminal voltage of the secondary battery when the state of charge is less than a prescribed first threshold value. The second threshold value is greater than the first threshold value, and the first threshold value and the second threshold value are set within a low SOC region.

Charge control device and charge control method

A charging control apparatus controls a state of charge of a secondary battery installed in a vehicle by a regulator possessed by an alternator. The charging control apparatus includes a calculating unit that calculates an SOC indicating a state of charge of the secondary battery, a determining unit that performs determination of whether the SOC calculated in the calculating unit is greater than a predetermined threshold, and a controlling unit that controls the regulator in such a manner that, in a case where it is determined by the determining unit that the SOC is greater than the predetermined threshold, a power generation voltage of the alternator comes to a low state, and in a case where it is determined that the SOC is less than the predetermined threshold, a power generation voltage of the alternator comes to a high state.

Charging-control apparatus and charging-control method

Solder wires are conveyed from insert openings for allowing the solder wires to be inserted toward discharge openings from which the solder wires are discharged and the solder wires project. The projecting wires are cut with first cutting blades and the solder wires inserted into the insert openings are cut with second cutting blades. This enables fixed cutting stress on a portion of the solder wires to be cut with the first cutting blades and a portion of the solder wires to be cut with the second cutting blades at the same time to prevent deformation of the cut surface of the cut solder wires. Solder columns having a column shape and having a uniform length along a conveying direction thereof can be manufactured.

Method for manufacturing solder column, apparatus for manufacturing solder column, and solder column

A charge acceptance limit determination apparatus includes a voltage measuring unit that measures a voltage of a secondary battery, a current measuring unit that measures an electric current flowing through the secondary battery, and a determining unit that determines whether or not the secondary battery has reached a charge acceptance limit in accordance with a position on a current-voltage plane of a voltage value and a current value that are measured by the voltage measuring unit and the current measuring unit.

Charge acceptance limit determination apparatus and charge acceptance limit determination method

A full charge sensing apparatus for sensing a fully charged state of a secondary battery based on an equivalent circuit model of the secondary battery includes a measuring unit that measures a voltage and a current during charging of the secondary battery, a learning unit that performs a learning process on a plurality of parameters in the equivalent circuit model using a result of measurement of the measuring unit, and a determining unit that determines that the secondary battery is in a fully charged state in a case where, among the parameters on which the learning process has been performed by the learning unit, a parameter corresponding to a reaction resistance of the secondary battery is greater than a predetermined threshold.

Full charge sensing apparatus and full charge sensing method

To prevent the breakage of the joint between a ceramic substrate and a glass epoxy substrate. The copper column is formed by a wiredrawing step for drawing a copper wire formed linearly to a predetermined diameter; a cutting step for cutting the copper wire, which has been drawn in the wire drawing step, in a predetermined length; a pressing step for pressing one end of the copper wire, which has been cut in the cutting step, in a longitudinal direction to form a copper column member; and an annealing step for annealing the copper column member, which has been formed in the pressing step, by maintaining a heating period of 60 minutes or longer at 600&#xb0; C. or higher. Thereby, the Vickers hardness of the copper column becomes is 55 HV or less and the copper column is softened. Therefore, when joining the ceramic substrate and the glass epoxy substrate through the copper column, heat stress caused by a difference between the thermal expansion of the ceramic substrate and the thermal expansion of the glass epoxy substrate can be absorbed by the copper member. As a result, the breakage of the joint between the ceramic substrate and the glass epoxy substrate can be prevented.

Copper column

A wireless base station includes: a trend factor regression expression calculator for determining, on the basis of measured wireless communication environment factor, the trend of the variation in the environment factor; a trend prediction value calculator for calculating, on the basis of the determined trend of the variation in the environment factor, the environment prediction value; an irregular variation factor calculator for calculating, on the basis of the difference between the determined trend of the environment factor variation and the measured environment factor, the magnitude of correction to be applied to the environment prediction value; and a radio environment prediction correction unit for correcting the environment prediction value according to the tolerance of the base station for its communication failure risk.

Wireless base station for communications network

A column suction-holding head capable of inserting columns into all the holes of a mounting jig collectively at once. The body of the column suction-holding head has elongate holes at the same positions as those of electrodes installed on a ceramic substrate of a ceramic column grid array, and suction holes are provided at the bottoms of the elongate holes. The column suction-holding head is superimposed on an alignment jig having columns aligned therein, and suction is applied from the suction holes. Consequently, the columns in the alignment jig are sucked into the elongate holes of the column suction-holding head.

Column suction-holding head and column mounting method

A wavelength path switching node apparatus is provided that improves the utilization efficiency of wavelength resources by allocating wavelength paths by following traffic variations in packet units. A node apparatus on the wavelength path start point side includes: a packet distributing section that stores input packets in a buffer, fetches the packets from the buffer and distributes to an initial path and additional paths; a control section that allocates the additional paths based on distribution states of the packet units; and an optical switch that switches wavelength paths based on this control. A node apparatus on the wavelength path end point side includes: a monitoring section that monitors packets distributed to the initial path and the additional paths; a control section that allocates the additional paths based on distribution states of the packet units obtained by this monitoring; and an optical switch that switches wavelength paths based on this control.

Wavelength path switching node apparatus and wavelength path allocation method

Lead-free solder balls having a good surface appearance with no appreciable surface defects such as seams and shrinkage cavities comprises an alloy having a composition consisting essentially of about 4.0% to about 6.0% by weight of Ag, about 1.0% to about 2.0% by weight of Cu, and a balance of Sn, and they have a diameter of from 0.05 mm to 1.0 mm. The solder balls can be produced by forming a molten alloy having the above-described composition into solidified balls having a diameter of from 0.05 mm to 1.0 mm using the surface tension of the molten alloy.

Lead-free solder balls and method for the production thereof

The present invention provides a radio channel assignment method where each node in a network assigns radio channels to respective radio links in a decentralized manner without inconsistency. The radio channel assignment method includes a step of assigning one of a pair of nodes terminating each radio link and the other thereof to an upper side and a lower side (Step S), and a step that each radio node located to the upper side from at least one of radio links terminating at an own node assigns a frequency slot different from that of an adjacent link to a radio link locating an own node to the upper side (Step S).

Radio channel assignment method and recording medium of program for controlling radio node

A solder ball is formed from an Sn&#x2014;Pb alloy which consists essentially of about 2&#x2013;65 mass % of Sn, 0&#x2013;5 mass % of Ag, about 0.1&#x2013;1 mass % of Sb, and 0.01&#x2013;0.1 mass % of Cu, and 0.01&#x2013;0.1 mass % of Bi, and a balance of Pb and incidental impurities. The solder ball has improved thermal fatigue resistance, good solderability, and good surface brightness after soldering.

Solder ball

An apparatus for aligning and dispensing a plurality of solder columns in an array. The apparatus includes a vibrator and an elongated alignment plate supported on the vibrator. The alignment plate includes a plurality of longitudinal guide grooves. A transparent cover is secured on the alignment plate and shaped to cover part of the guide grooves. A parts feeder is operatively associated with the alignment plate to feed solder columns over the upstream end of the alignment plate. The solder columns are received in the guide grooves and fed toward the downstream end of the alignment plate while the alignment plate is vibrated by the vibrator. The solder columns are arranged in an array within the guide grooves so that a vacuum pickup tool may readily capture the cylindrical body of the solder columns.

Growing community of inventors

Tokyo, Japan

Shinichi Nomoto