Mitsumi Electric Company Ltd.

Ntt Docomo, Inc.

Sony Ericsson Mobile Communications Japan, Inc.

Nintendo Co., Ltd.

Sony Mobile Communications Japan, Inc.

Yoshihide Majima

Toshiharu Shimizu

Toshimitsu Itoh

Teruo Shimazu

Akira Ikeuchi

Hidetsugu Touji

Katsuya Suzuki

Kuniharu Suzuki

Yoshinori Tangi

Eiichi Yoneyama

Takatoshi Itagaki

Kenichi Kasai

Kazuhiko Takeno

Yasuyuki Kanai

Hirotsugu Iijima

Haruo Uemura

Yoshihiro Okano

Tsuneo Uwabo

Kenichi Furukawa

Itsuki Nakano

Satoshi Ajiki

Takayuki Kanai

Hideo Seyama

Kenji Zusai

Tomoaki Hirota

Wataru Watanabe

Keiichi Kitamura

Hisakazu Hironaka

Satoshi Tsuji

Takao Sawabe

Mitsuhiro Takahashi

Akihiro Negishi

Hideaki Nasu

Hirotsugu Iljimai

Kuniharu c/o Sony Ericsson Mobile Comm Japan Inc Suzuki

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A protection monitoring circuit includes a protection circuit which detects overcharge, overdischarge, and overcurrent of a secondary battery, and a secondary battery monitoring circuit which monitors a state of the secondary battery and detects a residual quantity of the secondary battery. The protection circuit includes a first communication terminal that is connected to the secondary battery monitoring circuit, a second communication terminal that is connected to a mobile device, and a level shift circuit that is connected to the first and second communication terminals. The level shift circuit performs a level shift of a signal input of the first communication terminal so as to become a second level and outputs the signal to the second communication terminal, and also performs the level shift of a signal input of the second communication terminal so as to become a first level and outputs the signal to the first communication terminal.

Protection monitoring circuit, battery pack, secondary battery monitoring circuit, and protection circuit

A protection monitoring circuitincludes a secondary battery monitoring circuitwhich detects a state of a chargeable and dischargeable secondary battery, and a protection circuitwhich performs an ON/OFF control of a charge control transistor or a discharge control transistor disposed between the secondary batteryand a load or a charger device, and protects the secondary battery. The secondary battery monitoring circuit outputs a control signal that compulsively turns on/off the charge control transistor or the discharge control transistor, to the protection circuit. The protection circuitperforms the ON/OFF control of the charge control transistor or the discharge control transistor upon receipt of the control signal.

A battery-state monitoring apparatus includes: a secondary batterysupplying an electric power to portable equipment; and an operation processing partthat can detect a battery state of the secondary batteryin a detection mode to detect the battery state of the secondary battery, the operation processing part using the secondary batteryas a power source, wherein the battery-state monitoring apparatus includes a start-up current detecting partdetecting a start-up of the portable equipment, and wherein the operation processing partwaits for a detection of the battery state in a standby mode in which power consumption is smaller than the detection mode until the start-up is detected by the start-up current detecting part, and, on the other hand, the operation processing partdetects, by intermittently performing a temporary return from the standby mode to the detection mode, the battery state of the secondary battery in a return period during which the return is made.

Battery-state monitoring apparatus

A protection monitoring circuitincludes a protection circuitwhich detects at least one of overcharge, overdischarge, and overcurrent of a chargeable and dischargeable secondary batteryand protects the secondary batteryby performing an ON/OFF control of transistors Mand M, and a secondary battery monitoring circuitwhich detects a state of the secondary battery. The protection circuitsupplies a power supply voltage to the secondary battery monitoring circuit. If overdischarge of the secondary battery is detected, the protection circuitinhibits the supply of the power supply voltage to the secondary battery monitoring circuitafter a predetermined time has elapsed or after a control signal for inhibiting the supply of power supply voltage is received from the secondary battery monitoring circuit

Protection monitoring circuit and battery pack

A battery condition detector configured to detect a micro short circuit of a rechargeable battery is disclosed. The battery condition detector includes a processing part configured to calculate the remaining capacity and the full-charge capacity of a rechargeable batteryand to determine the micro short circuit of the rechargeable batteryby detecting an overcharge of the rechargeable batterybased on a charged capacity charged during the charging of the rechargeable battery, the remaining capacity calculated at a calculation time immediately before the start of the charging, and the full-charge capacity calculated before the start of the charging; and a communications partconfigured to output a signal according to the determination result of the processing part

Battery condition detector, battery pack including same, and battery condition detecting method

A battery status detecting method for detecting a battery status of a secondary battery is disclosed. The method includes: an open circuit voltage correcting step of obtaining a temperature-corrected value of the open circuit voltage of the secondary battery according to the temperature of the secondary battery, based on first open circuit voltage characteristics indicating the relationship between the open circuit voltage and the temperature of the secondary battery; and a charge rate correcting step of obtaining a temperature-corrected value of the charge rate of the secondary battery according to the temperature-corrected value of the open circuit voltage obtained in the open circuit voltage correcting step, based on second open circuit voltage characteristics indicating the relationship between the open circuit voltage and the charge rate of the secondary battery.

Battery status detecting method and battery status detecting apparatus

A battery status detecting method for detecting a battery status of a secondary battery that supplies power to an electrical load is disclosed. This method includes measuring a discharge current value of the secondary battery, and estimating the dischargeable capacity or the dischargeable time of the secondary battery with the measured discharge current value based on discharge characteristics of the secondary battery indicating the discharge status of the secondary battery when the voltage of the secondary battery drops to a predetermined voltage specified by the electrical load.

Apparatus and method for detecting a status of a secondary battery connected to a load

Disclosed is a mobile phone terminal with a battery pack containing a retraceable battery as power supply, and transmitting and receiving radio-signals to and from a mobile phone system base transceiver station. The mobile phone terminal includes a data communication terminal communicating data with the battery pack, an intermittent receiving processor periodically carrying out intermittent receiving processing via the base transceiver station when the mobile phone terminal is in a standby operation, and a battery status determining unit transmitting, while the intermittent receiving processor is carrying out intermittent receiving processing, an activating signal to the battery pack via the data communication terminal and reading battery status data from the activated battery pack.

Mobile phone terminal and communication system

Disclosed is a mobile terminal incorporating a battery pack utilized as power supply. The mobile terminal includes a positive terminal connected to a battery pack positive electrode, a negative terminal connected to a battery pack negative electrode, a data communication terminal communicating with a circuit in the battery pack, a charge control unit controlling charging of the battery pack via the positive terminal, and a reference voltage output unit outputting reference voltage. The terminal further includes a dividing resistor and a thermistor connected in series between the reference voltage output unit and the negative terminal, a temperature detector detecting temperature, and stopping charging of the battery pack based on the detected temperature, and a switching device controlling the voltage at the predetermined portion. The terminal still further includes a control unit communicating with the circuit in the battery pack via the data communication terminal, and changing the voltage at the predetermined portion when notified abnormality from the battery pack.

Mobile phone terminal and charging system

A communication system including a master station communication device and multiple slave station communication devices is disclosed. The master station communication device transmits a transmission request simultaneously to the slave station communication devices. The transmission request includes identification information identifying one or more of the slave station communication devices that are authorized to transmit information and time information indicating duration of time for which the one or more of the slave station communication devices are authorized to transmit the information. The one or more of the slave station communication devices transmit the information to the master station communication device based on the transmission request transmitted from the master station communication device.

Communication system, communication device, and communication method

Icon for a display screen

In a recording/reproducing device for use in recording and reproducing data on and from a recording medium while moving read/write head means relative to the recording medium in a moving direction, which comprises a carriage supporting the read/write head means and guided by a guiding member in the moving direction, and a voice coil motor comprising a voice coil and a magnetic circuit device for driving the carriage in the moving direction. The carriage has a coil holding portion by which the voice coil is fixedly held in the condition that the coil axis is arranged in the moving direction. The voice coil is applied with a driving electric current for driving the carriage. The magnetic circuit device is fixedly disposed adjacent to the voice coil to generate a magnetic field intersecting the driving current flowing through the voice coil, the voice coil moving in the moving direction together with the carriage by an interaction of the driving current and the magnetic field.

Recording/reproducing device with read/write head carriage supporting voice coil of voice coil motor for driving the carriage assembly

In a large-capacity FD comprising a disk-shaped recording medium on which a plurality of tracks are arranged with concentric circles, each track is divided into a predetermined number of sectors having a length equal to one another. Each sector consists of a serve field and a data field. The servo field in each sector includes a sector number field in which a sector number and alternation contents of the magnetic disk medium are written and a track number field in which a track number is written. The sectors on each track may be assigned with serial sector numbers in a circumferential direction in order with skipping over any defective sector. The plurality of tracks may be separated in a radial direction into a plurality of zones each including at least one alternate track. The plurality of tracks may be separated in a radial direction into a user data area and an alternate area which has an information identification sector for storing historic information in respect to preparation of the disk-shaped recording medium.

Disk-shaped recording medium and formatting method thereof wherein historic information including a storage capacity of the disk-shaped recording medium is recorded thereon

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Tokyo, Japan

Yoshihide Majima