Toyota Jidosha Kabushiki Kaisha

Mitsubishi Electric Corporation

Yazaki Corporation

Sei Corporation

Tsuyoshi Yano

Tetsuhiro Ishikawa

Hichirosai Oyobe

Makoto Nakamura

Hiroshi Yoshida

Akira Tsujiko

Daisuke Teramoto

Takuichi Arai

Tomitaro Hara

Sachie Yuasa

Keiko Wasada

Shinji Ichikawa

Hajime Kato

Eiji Nakamura

Gourab Majumdar

Kazunori Kagawa

Akihiro Otomo

Shinji Saito

Takehiko Sawai

Masahiro Kimata

Yuta Nemoto

Tadaichi Matsumoto

Kenji Tsuchiya

Masayuki Sumiyoshi

Koji Tamaru

Hirokuni Sasaki

Shigeki Ishii

Kazutoshi Syuto

Yoshiaki Kominami

Shogo Shibai

Masanobu Komae

Yoshiharu Yu

Katsuhiko Nishiyama

Kazuhiro Kondo

To provide an electrode for secondary battery, electrode which can materialize secondary batteries that are adapted into producing high output and additionally whose durability is high. It is characterized in possessing an electrode material that has an active-material powder, a conductive materialbeing formed of a carbonaceous material, and being adhered to a surface of said active-material powder, and fibrous conductive materialsbeing bonded to said conductive material. First of all, it becomes feasible to maintain the electric connection between the active-material powder and the conductive material stably by adhering the conductive material to a surface of the active-material powder. Further, the fibrous conductive materials are bonded to the conductive material that is adhered to a surface of the active-material powder. It is feasible to maintain the electric connection by getting the fibrous conductive materials entangled to each other. That is, it is feasible to keep the electric connection even when strains occur in the electrode material, because the fibrous conductive materials absorb the strains to keep the mutual contacts; even if large strains occur, it is possible to maintain the electric connection, because it is not disconnected compared with that in conventional conductive materials.

Electrode for secondary battery and production process for the same and secondary battery

A battery assembling apparatus is disclosed. The battery assembling apparatus comprises: first and second rotary tables arranged to face each other at points on respective outer circumferences and rotate in forward directions relative to each other; a battery holding part provided on the outer circumference of the first rotary table to hold a battery; a frame holding part provided on the outer circumference of the second rotary table to hold a frame; a battery supplying part for supplying batteries to the battery holding part at a position different from a facing position between the first and second rotary tables; a frame supplying part for supplying frames to the frame holding part at a position different from the facing position; and a discharging part for taking out an assembly of a battery and a frame assembled together from the facing position.

Battery assembling apparatus and battery assembly manufacturing method

Provided is a secondary battery system which can accurately detect a state of a secondary battery system (such as a secondary battery state and a secondary battery system failure). The secondary battery system () includes dV/dQ calculation means which calculates a dV/dQ value as a ratio of a change amount dV of a battery voltage V of a secondary battery () against a change amount dQ of an accumulation amount Q when the accumulation amount Q of the secondary battery () is changed. The secondary battery system () detects the state of the secondary battery system () by using the dV/dQ value.

Secondary battery system

A control method for a lithium ion secondary battery includes performing a charging step of charging the lithium ion secondary battery with a predetermined quantity of electricity when the battery voltage of the lithium ion secondary battery has decreased to a lower limit battery voltage that is set at a value that falls within a range higher than (B&#x2212;C) V and lower than or equal to (B&#x2212;C+0.2) V where a maximum value of a positive electrode potential of a flat portion in a discharge positive electrode potential curve is B (V) and a negative electrode dissolution potential is C (V). It is possible to suppress a dissolution of a negative electrode current collector of the lithium ion secondary battery to prevent the service life of the lithium ion secondary battery from shortening because of an internal short circuit.

Control method for lithium ion secondary battery, and lithium ion secondary battery system

To provide a hybrid fuel cell system for improving converter efficiency. In a hybrid fuel cell system () in which a fuel cell () and an electricity storage device () are connected via a voltage converter (), the voltage converter () has a plurality of phases (P, P, P), and the number of phases of operation can be changed in accordance with the power passing through the voltage converter (). As the number of phases can be changed in accordance with the power passing through the voltage converter (), it is possible to select the number of phases that give a higher efficiency voltage conversion in accordance with the passing power, and the efficiency of the voltage converter () can be greatly improved.

Hybrid fuel cell system and voltage conversion control method thereof

A vehicle comprises a battery, i.e. a power storage unit having a capacity different from a reference capacity, a current sensor for detecting a current inputted to the power storage unit or outputted therefrom and delivering the detection value by converting it depending on the ratio of the capacity of the power storage unit to the reference capacity, and a controller performing current integration by receiving the output from the current detecting section and judging charged state of the power storage unit. The current sensor preferably comprises a sensor for measuring a current flowing through wiring connected with the power storage unit, and a converting section for converting the sensor output depending on the ratio of the capacity of the power storage unit to the reference capacity. When the capacity of the power storage unit is equal to n times of the reference capacity, the converting section delivers the sensor output while multiplying by 1/n.

Vehicle, power supply device of vehicle, and current detection device

A power supply device for a vehicle includes a battery (B) which serves as a first power storage device, a battery (B) which serves as a second power storage device, a vehicle load, a selection switch (RY) which selects one of the first and second power storage devices and connects the selected power storage device to the vehicle load, and a control device () which, when a current flowing through the selection switch (RY) is larger than a prescribed value, controls the vehicle load so that the current flowing through the selection switch (RY) is made smaller than the prescribed value, and switches the selection switch. Preferably, when the control device () switches the selection switch (RY), the control device controls inverters () to achieve a balance between electric power generated in a first motor generator (MG) and electric power consumed in a second motor generator (MG).

Power supply device for vehicle and method of controlling the same

A request determining unit compares a battery temperature of a battery unit with a predetermined temperature management value, and produces a heating request or a cooling request when a temperature deviation of a predetermined threshold is present between them. A current direction determining unit determines, based on thermal reaction characteristics of the battery unit, in which one of a direction on a charge side and a direction on a discharge side a current is to be passed for responding to the heating request or the cooling request. A target current value determining unit determines a target current value related to the charge/discharge determined by the current direction determining unit. A current control unit produces a switching instruction for matching a battery current of the battery unit with the target current value provided from a selecting unit.

Power supply system, vehicle with the same and temperature managing method

Electrical connector

A power supply device for a vehicle includes a battery serving as a first electric storage device, a battery serving as a second electric storage device, a motor generator driving a wheel, a selection switch selecting one of the first and second electric storage devices and connecting the selected electric storage device to the motor generator, and a control device controlling switching of the selection switch in accordance with a state of charge of each of the first and second electric storage devices. In the case where the selection switch selects the first electric storage device, when charging is performed and the state of charge of the first electric storage device becomes higher than a first prescribed level, the control device instructs the selection switch to select the second electric storage device.

A power conversion portion () and a connection portion () converting power between a fuel cell (FC) and a battery (BAT) corresponding to dc power supply and a motor generator (MG) corresponding to an ac machine, are configured of a matrix converter. For a power flow pattern requiring that the dc power supply provide high voltage, a switch (SCd) in the connection portion () operates in response to a control signal received from a control device () to electrically connect a power supply line (LC) to a power supply line (Ld) to connect the fuel cell (FC) and the battery (BAT) in series.

Power conversion device and vehicle equipped therewith

This invention provides a power supply system for supplying electrical power to a load. The system includes: a first and a second power supply wirings for a connection to the load; a fuel cell system having a fuel cell connected between the first and second power supply wiring; a secondary power supply system connected in parallel to the fuel cell between the first power supply wiring and the second power supply wiring; a switch for opening and closing the connection between the fuel cell and the first power supply wiring; a countercurrent prevention device connected between the fuel cell and the first power supply wiring; and a controller for controlling the secondary power supply system and the switch. The controller controls the secondary power supply system to boost a terminal voltage of the secondary power supply system to a first voltage, when connecting the fuel cell to the first power supply wiring. The first voltage is equal or higher than an electrical potential difference of the open terminals of the fuel cell.

Fuel cell system having secondary cell

A power source monitoring apparatus for monitoring a state of a subject power source which consists of at least one of a plurality of electric power sources in an electric system wherein a load device having at least one electrically operated load is electrically connected to the power sources, the monitoring device apparatus a detecting portion which detects a voltage and/or a current of at least one of the load device and the plurality of electric power sources, and a diagnosing device which diagnoses the subject power source for an abnormality on the basis of an output of the detecting portion, while the electric system is placed in a power supply state wherein an electric power is permitted to be supplied from only the subject power source to the load device.

Apparatus for diagnosing electric power source while power is supplied to load device from the power source

Growing community of inventors

Toyota, Japan

Tsuyoshi Yano