Hitachi Automotive Systems, Ltd.

Hitachi, Ltd.

Hitachi Vehicle Energy, Ltd.

Shin-kobe Electric Machinery Co., Ltd.

Other

Hitachi Astemo Ltd.

Akihiko Kudo

Akihiko Emori

Mutsumi Kikuchi

Tatsumi Yamauchi

Kenji Kubo

Youhei Kawahara

Tsuyoshi Kai

Hideki Miyazaki

Tomonori Kanai

Yoshinori Aoshima

Akihiro Machida

Gosuke Shibahara

Shigeyuki Yoshihara

Kazuyoshi Sasazawa

Tatsuo Horiba

Kei Sakabe

Masaki Nagaoka

Tomoyuki Arima

Yasuo Uemura

Hikaru Miura

Kenichiro Tsuru

Takahiro Kawata

Masahiko Amano

Masahito Sonehara

Ryouhei Nakao

Akiko Tsukamoto

Hirotaka Takahashi

Masami Shida

Shuko Yamauchi

Hiroshi Iwasawa

Masahiro Ueda

Tunemi Aiba

Mitsuo Noda

Takanori Yamazoe

Masato Isogai

Takahide Terada

Satoru Shigeta

Kenji Nakai

Atsuo Suga

Keiichiro Okawa

Yuji Yoshioka

Akihiro Emori

Youhei Hitachi Ltd Intellectual Property Group Kawahara

Akihiko c/o Hitachi Ltd Intellectual Property Group Emori

Takahiro Hitachi Ltd Intellectual Property Group Kawata

Even when a service disconnect switch is opened, an integrated circuit connected to single battery cells are operated. The cell controller is provided with: the integrated circuits; a signal transmission path through which a signal is transmitted between the integrated circuits via the capacitors; and the connection circuit. The first integrated circuit is provided corresponding to the first cell group electrically connected to one side of the SD-SW, and the second integrated circuit is provided corresponding to the second cell group electrically connected to one side of the SD-SW. The connection circuit AC-couples the ground terminal GND of the first integrated circuit to the ground terminal GND of the second integrated circuit through the capacitor.

Battery management device

A battery system includes a battery module that is constituted with a plurality of serially connected battery cells, a plurality of integrated circuits that group the battery cells so as to perform processing on battery cells in each group, a first transmission path through which a command signal is transmitted via a first insulating circuit from a higher-order control circuit that controls the integrated circuits to a highest-order integrated circuit of the integrated circuit, a second transmission path through which a data signal collected by the integrated circuits is transmitted from the highest-order integrated circuit to a lowest-order integrated circuit, and a third transmission path through which the data signal is transmitted from the lowest-order integrated circuit to the higher-order control circuit via a second insulating circuit.

Battery system in which information transmission occurs via insulating circuits

Cell voltage measurement is executed immediately after termination of diagnosis on a cell voltage detection function. In a battery managing device, a voltage detecting unitdetects a terminal voltage of each of battery cellsand. An RC filteris electrically connected to voltage detecting lines L, L, and L, and a status variation causing unitcauses an electrical status variation with respect to the voltage detecting lines L, L, and L. A voltage fluctuating unitfluctuates the terminal voltage of the battery cellsandin response to the electrical status variation that is caused by the status variation causing unit. A microcomputerdiagnoses the voltage detecting uniton the basis of a detection result of the terminal voltage of the battery cellsandby the voltage detecting unitwhen the terminal voltage of the battery cellsandis fluctuated by the voltage fluctuating unit

Battery managing device, battery monitoring circuit, and control system

A battery system monitoring apparatus for monitoring a cell group having a plurality of battery cells, and includes a cell controller IC which monitors and controls the states of the plurality of battery cells. A battery controller controls the cell controller IC and a plurality of voltage detection lines measure the voltage across the terminals of the battery cell. The voltage detection lines connect positive and negative electrodes of the battery cell, respectively, to a plurality of voltage input terminals of the cell controller IC. A power line connects the positive electrode of the battery cell having the highest potential among the plurality of battery cells to a power supply terminal of the cell controller IC and a ground line which connects the negative electrode of the battery cell having the lowest potential among the plurality of battery cells to a ground terminal of the cell controller IC.

Battery system monitoring apparatus and electric storage device including the same

An object is to achieve management control of an assembled battery using an accurate measured value of a cell voltage. A battery system monitoring apparatusthat monitors and controls a battery system includes battery monitoring circuitsprovided for respective cell groups. Each of the battery monitoring circuitsincludes a cell voltage measurement modulethat is connected with two electrodes of respective single battery cellsof a corresponding cell groupvia voltage detection linesand that measures a cell voltage of each of the single battery cellsat each of predetermined timings. An RC filteris connected with the voltage detection lines. The RC filterincludes resistors and capacitors. The cell voltage measurement moduleextends intervals at which the cell voltage is to be measured when a stored charge amount in the capacitor in the RC filterchanges.

Battery system monitoring apparatus

Measurement of a cell voltage is executed immediately after diagnosis of a battery management device is ended. In a battery management device, current sources repeatedly perform an energization operation to cause a current to flow to voltage detection lines with a magnitude of the current that enables each amount of charge stored in capacitors changed by one energization operation to fall within a range corresponding to a fluctuation width of terminal voltages of battery cells during the energization operation when resistors are in a normal state. When the difference between the current terminal voltage of the battery cell and the past terminal voltage of the battery cell is larger than the predetermined threshold value, the microcomputer diagnoses that the resistor is in the open state.

Battery management device, battery monitoring circuit, and control system

A battery monitoring system, comprises a battery state detection circuit that detects battery states of a plurality of battery cells that are connected in series, based on respective cell voltages of the plurality of battery cells, and a control circuit that monitors state of a battery cell, based on each cell voltage of the plurality of battery cells. The control circuit inputs pseudo voltage information to the battery state detection circuit, and thereby diagnoses whether or not the battery state detection circuit is operating normally.

Battery monitoring system

A leak detection device includes a pulse signal outputting portion that outputs predetermined pulse signals to a positive connecting wire connected to a positive side of a battery and a negative connecting wire connected to a negative side of the battery. A response waveform detecting portion of the leak detection device detects a positive response waveform for the pulse signal output to the positive connecting wire and a negative response waveform for the pulse signal output to the negative connecting wire. An amplitude ratio calculating portion calculates an amplitude ratio based on the positive response waveform and the negative response waveform, and a leak detecting portion detects a leak between the battery and a ground based on the amplitude ratio.

Leak detection device

Even with a large ripple voltage superposed on a voltage of a battery cell, the voltage of the battery cell can be measured accurately. In a battery monitoring device, a supply circuit, based on a reference voltage inputted from an assembled battery, generates a driving voltage for driving each of switching elements, of a selection circuit and supplies the driving voltage to the selection circuit. The reference voltage is inputted from the assembled battery to the supply circuit via a detecting filter circuit. As a result, a time constant of a route through which the reference voltage is inputted from the assembled battery to the supply circuit is approximately equal to time constants of detecting filter circuits.

Battery monitoring device

A battery system monitoring device includes a plurality of battery monitoring circuits, which is respectively provided in cell groups, and a balancing resistor. Each of the battery monitoring circuits includes a cell voltage measurement unit to measure a cell voltage of each single battery cell at predetermined timing, a discharge switch to switch a state of a discharge current which flows from each single battery cell through the balancing resistor, and a balancing control unit configured to control the discharge switch. A filter circuit is connected between the cell voltage measurement unit and each single battery cell. The cell voltage measurement unit determines whether a cell voltage is measured within a transient response period corresponding to a time constant of the filter circuit and corrects a measurement value of a cell voltage by using a correction value correcting a result of the determination.

Battery system monitoring device

A battery monitoring and control integrated circuit is connected to a cell group having a plurality of series-connected single cells for monitoring and controlling the single cells, and includes: a first start input terminal for connecting to a DC signal generation circuit which generates a DC signal based on an AC start signal input from the outside; a start detection unit which detects the DC signal and activates the battery monitoring and control integrated circuit; and a start output unit which outputs the AC start signal to the outside after the activation of the battery monitoring and control integrated circuit.

Battery monitoring and control integrated circuit and battery system

A battery monitoring device monitors a battery having a plurality of cell groups in which a plurality of cells is connected in series. The battery monitoring device comprises at one or more integrated circuit units, each of which corresponds to each cell group, that respectively measure the voltages of the cells of the cell group and performs cell balancing in order to adjust the capacities of the cells of the cell group; a control unit that controls the integrated circuit unit; and a power supply unit that supplies power to the control unit. The control unit causes the integrated circuit unit to start or to stop cell balancing, and sets a timer period for starting or stopping supply of the power.

Assembled battery monitoring device

A power supply startup system activates a power supply of a device provided with a battery or the like at high speed by a wireless signal while suppressing current consumption on standby. The power supply startup system includes a battery, a device supplied with a power from the battery, and a controller which performs wireless communication with the device. The device includes a power supply section which generates a power supply from the battery, a startup section which receives a wireless startup signal transmitted by the controller and outputs a startup signal to the power supply section, a control section which controls the power supply section and the startup section, and a wireless communication section which performs wireless communication with the controller. The wireless startup signal includes at least two signal regions of a first stage and a second stage.

Power supply startup system

A battery system monitoring device that monitors a battery system provided with a cell group having a plurality of battery cells connected in series with each other, including: a first control device that monitors and controls states of the plurality of battery cells of the cell group; a second control device that controls the first control device; a temperature detection unit that measures a temperature in the vicinity of the first control device; and a plurality of voltage detection lines, for measuring an inter-terminal voltage of the battery cell, which connect each of a positive electrode and a negative electrode of the battery cell and the first control device. The first control device includes a balancing switch, which performs balancing discharge of the battery cell for each of the battery cells.

There is provided a highly reliable storage battery apparatus which can diagnose the status of a temperature detection unit and a cooling unit. In the storage battery apparatus comprising a battery module including one or more batteries, a plurality of temperature detection units and a cooling unit cooling the battery module, the temperature detection units measure, at least, the temperature of the cooling medium inputted to the storage battery apparatus, the temperature of the cooling medium outputted from the storage battery apparatus, and the temperature of at least one of the batteries and the battery module.

Storage battery apparatus

Growing community of inventors

Hitachinaka, Japan

Akihiko Kudo