Hitachi Vehicle Energy, Ltd.

Hitachi, Ltd.

Hitachi Automotive Systems, Ltd.

Hitachi Mito Engineering Co., Ltd.

Shuko Yamauchi

Yutaka Kobayashi

Masahiro Iwamura

Tsunenori Yamamoto

Akihiko Emori

Yutaka Sato

Youhei Kawahara

Hirotaka Takahashi

Masami Shida

Yoshinori Aoshima

Akihiko Kudo

Tatsumi Yamauchi

Osamu Suzuki

Takeshi Inoue

Seiji Ishida

Takashi Akioka

Hironori Sasaki

Takanori Yamazoe

Hiroshi Arita

Kinya Mitsumoto

Akihiro Tamba

Hidetoshi Honbo

Eiichi Toyota

Yasushi Muranaka

Seiji Takeuchi

Motomi Shimada

Shigeki Makino

Mitsutoshi Honda

Yosuke Yasuda

Masanori Yoshikawa

Daiki Komatsu

Satoru Okabe

Shinji Imai

Takayoshi Nishino

A battery control system is provided with a plurality of battery cell management devices that are provided respectively corresponding to a plurality of battery cell groups each constituted by one or a plurality of battery cells and each acquire a measurement result of the state of charge of the battery cell of the corresponding battery cell group and an assembled battery management device for wirelessly communicating with the battery cell management devices. When it is impossible to wirelessly communicate with any of the battery cell management devices, the assembled battery management device wirelessly communicates with the said any of the battery cell management devices via any of other battery cell management devices except the said any of the battery cell management devices.

Battery control system

A secondary battery module includes a battery information storage unit for storing electric characteristic information and usage history information of the secondary battery module. A battery information management device and a terminal device respectively include interfaces to be connected to the secondary battery module. The battery information management device is provided with a battery information database. The battery information management device is connected to the terminal device through a communications network. In this way, battery information stored in the battery information storage unit, which is acquired by the battery information management device and the terminal device, is accumulated in the battery information database. Moreover, the battery information management device grades the secondary battery module for reuse based on the battery information and a predetermined threshold.

Secondary battery module, battery information management device, battery information management system, secondary battery reuse system, secondary battery recovery and sales system, secondary battery reuse method, and secondary battery recovery and sales method

In a status detector for a power supply, a power supply, and an initial characteristic extracting device for use with the power supply, a measuring unit obtains measured values of at least current, voltage and temperature of the electricity accumulating unit. A processing unit executes status detection of the electricity accumulating unit by using the measured values and the characteristic information of the electricity accumulating unit which is stored in a memory unit. A discrepancy detecting unit detects the presence of a discrepancy away from a theoretical value when a result of the status detection is changed over a predetermined threshold or reversed with respect to the measured values. A modifying unit modifies the characteristic information depending on the detected discrepancy.

Status detector for power supply, power supply, and initial characteristic extracting device for use with power supply

A battery management system which can output a battery state enabling optimum charge and discharge control to be performed even when a temperature variation occurs among individual single cells. A plurality of temperature sensors measure temperature values of a battery. A measurement unit measures a voltage and a current of the battery. A maximum/minimum temperature selection unit in a calculation unit determines a maximum temperature and a minimum temperature from the temperature values measured by the temperature sensors. An available power calculation unit calculates respective values of maximum available charge and discharge powers or maximum available charge and discharge currents of the battery corresponding to the maximum temperature and the minimum temperature based on the voltage and the current of the battery. A selection unit selects and outputs smaller maximum available charge and discharge powers or smaller maximum available charge and discharge currents from the respective values of the maximum available charge and discharge powers or the maximum available charge and discharge currents of the battery corresponding to the maximum temperature and the minimum temperature, which are calculated by the calculation unit.

Battery management system for calculating charge and disharge powers

A storage battery managing apparatus which ensures charge-discharge control of a storage battery in consideration of state variation of each unit cell even if the battery pack includes a number of component unit cells, and a vehicle controlling apparatus providing the same. A storage battery includes a plurality of chargeable-dischargeable unit cells connected in which battery management ICs detect the cell voltage of each unit cell, a voltage sensor detects a storage battery voltage and a current sensor detects currents to be charged and discharged in the storage battery. A degree of SOC imbalance is obtained by use of detected cell voltage of each unit cell when the storage battery is being neither charged nor discharged.

Storage battery managing apparatus and vehicle controlling apparatus providing the same

Battery management system

A lithium secondary battery having a high energy density, a long life, a low cost, an improved safety and a high output density uses a high crystalline carbon or an amorphous carbon bearing fine particles of a metal which forms an alloy with lithium, and a metal which does not form any alloy with lithium, in the range of 5-10% by weight, as a material for the negative electrode thereof.

Lithium secondary battery having negative electrode of carbon material

A semiconductor integrated circuit device is divided into a plurality of blocks, which are individually equipped with signal generate units such that the signal generate units are distributed in the semiconductor integrated circuit device. The semiconductor integrated circuit device is preferably constructed to generate the pulse signal by the pulse generate units which are provided for the individual blocks, after all initial logic operations on the data and control signals have been taken. Thanks to this construction, an SRAM, for example, can have its write recovery time minimized to 0 so that it can achieve high-speed operations. Moreover, since predecoders are provided for the individual blocks, the wiring line number and area in the chip can be reduced to improve the degree of integration of the semiconductor integrated circuit device. Still moreover, signal delay and skew can be reduced in the chip so that high-speed can be achieved. Another feature is that either the input/output pads of the data into or out of the semiconductor integrated circuit device or their accompanying circuit units are distributed in the semiconductor integrated circuit device. The individual features described above can be used solely or in combination, if necessary, to achieve the above-specified objects.

High-speed semiconductor memory device and data processing system using

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Hitachi, Japan

Shuko Yamauchi