Nec Corporation

Nippon Electric Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Tokyo Ohka Kogyo Co., Ltd.

Waseda University

Kazuaki Utsumi

Yuzo Shimada

Tetsuya Osaka

Yasumasa Oguma

Shingo Tsuda

Tokihiko Yokoshima

Daikichi Mukoyama

Tomeji Ohno

Atsushi Ochi

Koji Matsui

Masanori Suzuki

Masatomo Yonezawa

Hideo Takamizawa

Hiroshi Komano

Makihiro Otohata

Masatomo Mizuta

Hiroshi Yageta

Kazuhiro Ikuina

Toshimi Aoyama

Sadayuki Takahashi

Mitsuru Kimura

Yasuhiro Kurokawa

Teruyuki Ikeda

Keiji Katayama

Eiichi Ogawa

Susumu Saito

Yutaka Saito

Takeshi Inoue

Seiji Takahashi

Shinji Abe

Toru Mori

Takeshi Yano

Tadanori Shimoto

Naoji Senba

Yoshio Sano

Takashi Saito

Michihisa Suga

Keiji Nunomura

Masato Shirakata

Manabu Bonkohara

Mitsuo Tsuzuki

Kenichi Tokuno

Shiro Yoshida

Akihiro Dohya

Yoshitsugu Funada

Shuzo Fujii

Tetsuo Yoshimoto

Nobuaki Shohata

Mitsuo Saitou

Ikushi Morizaki

Souichiro Sugano

Tomotoshi Nakai

Mitsuhiro Midorikawa

A temperature estimating apparatus is provided with: a deriving device configured to derive a slope function, on the basis of a value of a complex impedance of a battery at a predetermined frequency out of values obtained at a plurality of different temperatures and on the basis of a temperature of the battery when the complex impedance is obtained, wherein the slope function indicates a relation between the value of the complex impedance at the predetermined frequency and an inverse of the temperature of the battery; and an estimator configured (i) to measure a value of the complex impedance at the predetermined frequency and (ii) to substitute the measured value of the complex impedance at the predetermined frequency into the slope function, thereby estimating a temperature of the battery when the value of the complex impedance is measured.

Temperature estimating apparatus

A battery state estimating apparatus is provided with: an acquirer configured to obtain a plurality of complex impedances of a battery at a plurality of different temperatures; a calculator configured to calculate a slope of a straight line connecting values of the obtained plurality of complex impedances at a first predetermined frequency on a complex plane having an axis that is a real component of the complex impedance and an axis that is an imaginary component of the complex impedance, as a slope of the complex impedance; a storage configured to store in advance a relation between the slope of the complex impedance and a battery state associated with the battery; and an estimator configured to estimate the battery state on the basis of the calculated slope of the complex impedance and the stored relation.

Battery state estimating apparatus

A battery state estimating apparatus is provided with; a voltage detector configured to detect a voltage between a positive electrode and a negative electrode of a battery; an impedance detector configured to detect an impedance of the battery; a first estimator configured to estimate a first temporary value of a charge amount of the battery; a second estimator configured to estimate a second temporary value of the charge amount of the battery; and a determinator configured (i) to determine that the first temporary value is the charge amount of the battery if the first temporary value or the second temporary value is out of a predetermined range, and (ii) to determine that the second temporary value, or a corrected value of the first temporary value is the charge amount of the battery if the first temporary value or the second temporary value is within the predetermined range.

A battery state estimating apparatus is provided with: an acquirer configured to obtain complex impedances of a battery at a different temperatures; a calculator configured to calculate a slope of a first straight line or a slope of a second straight line as an impedance slope, wherein the first straight line connects values of the complex impedances at a first predetermined frequency, wherein the second straight line connects a convergence point and at least one of values of the plurality of complex impedances at a second predetermined frequency; and an estimator configured to estimate a battery state associated with the battery on the basis of the impedance slope and a relation stored in a storage, if it is determined by a determinator that a temperature of the battery is in a predetermined temperature area.

A battery state estimating apparatus is provided with: an acquirer configured to obtain a complex impedance of a battery; a calculator configured to calculate a ratio of a variation of a predetermined feature amount regarding the complex impedance; and an estimator configured to estimate a charge amount of the battery on the basis of the ratio of the variation of the predetermined feature amount with respect to an integrated current value, which is an integrated value of an electric current flowing through the battery.

There are provided electric cells, a battery pack containing three or more electric cells, a battery control system and a battery control method. An electric cell for a battery pack will be interconnected with another cell to be used as a battery pack. For example, an electric cell comprises an electrochemical cell, a communication unit communicating with other electric cells, a measurement unit acquiring cell-state of the electrochemical cell, and a discharge unit discharging the electrochemical cell. The communication unit transmits a cell-state of the electrochemical cell and receives external information. The discharging unit discharges the electrochemical cell based upon both the cell-state of the electrochemical cell and the received external information.

Electric cells for battery pack, battery control system, and battery control method

A packaged battery, an assembled battery, and a film-covered battery, which can prevent a dangerous state involving a high-pressure gas filled in the film-covered battery while ensuring a sealing reliability, are provided. The Packaged battery includes film-covered batteryincluding a battery element and exterior films forming a sealed space housing the battery element, and holding memberholding film-covered battery. The sealed space includes a housing section housing the battery element, and a pocket communicating with the housing section to expand when the pressure in the sealed space increases. The pocket includes a safety valve which activates when the pocket expands. Holding memberincludes an opening and a cavity fitting the housing section therein. When the housing section is fitted into the cavity, at least part of the pocket and the safety valve protrude to the outside of the holding member from the opening.

Packaged battery, stacked battery assembly, and film-covered battery

Charging apparatusincludes secondary batteryused for buffering, rectifierthat supplies direct current power to secondary batteryused for buffering, DC-DC converterconnected to driving batteryin electric vehiclevia charging cable, switching control circuit, and isothermal wind generatorthat adjusts the temperature of secondary batteryused for buffering from outside of secondary batteryused for buffering. Switching control circuitswitches charging apparatusbetween a first mode in which power supplied by rectifieris accumulated in secondary batteryused for buffering and a second mode in which driving batteryis charged with the power supplied by secondary batteryused for buffering. Secondary batteryused for buffering includes at least one cell in which a battery element with a positive electrode plate and a negative electrode plate that are laminated therein is sealed with an outer cover film.

Charging apparatus and charging/discharging apparatus including temperature adjusting element of secondary battery for buffering

There are provided a battery control system and a battery control method which can eliminate a management device controlling voltages of individual cells in a battery pack, resist the influence of noise, prevent an increase in size, and reduce the load on a management device. A cell for a battery pack will be interconnected with another cell to be used as a battery pack, the cell comprises unit celland control circuit, unit cellis one electrochemical cell, and control circuitincludes: measurement meansfor acquiring cell-state information including at least a voltage of unit cell; transmission meansfor transmitting the cell-state information to the outside; reception meansfor receiving external information; and meansfor discharging unit cellbased upon the cell-state information on unit celland the external information, to bring the voltages of interconnected cells closer.

In a semiconductor package stack module, an LSI (Large Scale Integrated circuit) is mounted, via fine bumps, on a ceramic carrier substrate or a flexible carrier film on which wiring conductors are formed. After a seal resin has been injected, the chip is thinned by, e.g., grinding. A plurality of such carrier substrates or carrier films are connected to each other by bumps via through holes which are electrically connected to the wiring conductors, thereby completing a tridimensional stack module. The module achieves a miniature, thin, dense, low cost, and reliable structure without resorting to a wire bonding system or a TAB (Tape Automated Bonding) system. In addition, the module has a minimum of wiring length and a desirable electric characteristic.

Semiconductor packing stack module and method of producing the same

A packaged semiconductor device includes an LSI chip, a chip size package integrally bonded to the LSI chip to mount and hold the LSI chip thereon in order to connect an electrode of a board on which the LSI chip is to be mounted and an electrode of the LSI chip to each other, an electrode formed on a surface of the package opposite to a surface thereof which is bonded to the LSI chip, so as to be connected to the electrode of the board, at least one through hole formed to extend through the LSI chip and the package, and a connecting conductor formed to extend through the through hole in order to connect the electrode of the package and the electrode of the LSI package to each other.

Packaged semiconductor device and method of manufacturing the same

A laminated multi-layer printed board having at least a power source circuit layer, at least a ground layer and at least a signal layer includes a hole which extends through the board to the power source circuit layer. An inductor is provided in the hole.

Multi-layer printed board with an inductor providing a high impedance at

This invention relates to an interconnection structure comprising one or more insulating films and one or more layers of conductor electrode patterns, wherein at least one of the insulating films consists of a fluorene skeleton-containing epoxy acrylate resin, and to a method of making a multilayer interconnection structure including the steps of roughening the surface of an insulating resin layer and forming a conductor thereon by electroless plating, wherein the average roughness (Ra), maximum roughness (Ry) and conductor thickness (T) of the roughened surface of the insulating resin layer satisfy the following relations:

Interconnection structures and method of making same

Growing community of inventors

Tokyo, Japan

Kazuaki Utsumi