Sony Corporation

Murata Manufacturing Co., Ltd.

Tohoku Murata Manufacturing Co., Ltd.

Eiji Kumagai

Kenji Nagashima

Naoyuki Sugeno

Koji Umetsu

Toshio Morizumi

Yukio Shishido

Tatsuya Adachi

Noritoshi Imamura

Kazuharu Yanagihara

Satoshi Kumai

Akira Sampei

Hisato Asai

Hiroyuki Ito

Shigeaki A Wachi

Tetsuji Kawashima

Michihiko Iida

Shuichi Takizawa

Kunihiko Miyake

Bunya Sato

Morihiko Sato

Kohki Watanabe

Futoshi Tsukada

Atsushi Chinen

Atsushi Minami

Raghunath Bellala

Aniket Khade

Masayuki Yasuda

There is provided a charging device including a charging voltage providing unit configured to provide a maximum charging voltage for an electricity storage unit, wherein the electricity storage unit includes a plurality of battery cells, and wherein the maximum charging voltage satisfies an equation (1) below: Maximum Charging Voltage=Total Battery Voltage+(Fully Charged Voltage&#x2212;Maximum Cell Voltage)*n (1) wherein n represents a total number of the battery cells connected in series.

Charging device, charging control method, electricity storage device, power storage device, power system, and electric vehicle

There is provided a power storage device including a plurality of modules each including secondary batteries, a charging switch that controls charging to the secondary batteries, a discharging switch that controls discharging of the secondary batteries, and a voltage measuring unit that measures a voltage of the module, and a switch control unit that controls one or both of the charging switch and the discharging switch. The modules are connected in parallel. The switch control unit maintains an on state of the discharging switch for at least one of the modules for a predetermined period, and controls the charging switch of the module in which a maximum module charging current estimated based on the voltage of the module is a predetermined value or less, to be in an on state.

Power storage device, power storage system, and control method of power storage device

A battery system including a battery unit including a plurality of battery cells, and a control device including a power supply boot-up unit. The power supply boot-up unit is configured to receive a voltage from the plurality of battery cells, and supply a control signal in response to the voltage supplied by the plurality of battery cells.

Control device to boot up power source

A battery monitor circuit includes a first monitoring unit for detecting voltages of battery cells in a first group, a second monitoring unit for detecting voltages of battery cells in a second group, and a current cancellation unit for canceling a difference between first and second currents that flow through the first and second monitoring units, respectively. One terminal of a series connection of the battery cells in the first and second groups and one terminal of the first monitoring unit are connected, the other terminal of the first monitoring unit and one terminal of the second monitoring unit are connected, and the other terminal of the second monitoring unit and the other terminal of the series connection are connected. The current cancellation unit is disposed between a connection point between the first and second monitoring units and a middle connection point in the middle of the series connection.

Battery monitor circuit, storage apparatus, electronic apparatus, electric-powered vehicle, and power system

A first power source line disposed between a positive electrode side of an electricity storage unit and a first external terminal, a second power source line disposed between a negative electrode side of the electricity storage unit and a second external terminal, a power source circuit connected to both the first and second power source lines and configured to supply an output voltage to a control circuit in an operating state, a power source control circuit configured to control an operating state and a non-operating state of the power source circuit, a first control signal generation circuit configured to supply a first control signal corresponding to transition of an external voltage applied to the first external terminal and the second external terminal to the power source control circuit to set the power source circuit in an operating state for a prescribed time, and a second control signal generation circuit configured to generate a second control signal that allows the power source circuit to be set in an operating state continuously by the control circuit to which an output voltage of the power source circuit is supplied are included.

Electricity storage device, electricity storage system, and method for controlling electricity storage device

A connection mode of a plurality of arbitrarily connected storage units is detected and the plurality of storage units is controlled according to the detected connection mode. Six storage modules MODto MODare connected in series. A total voltage V(Total) and individual output voltages V() to V() of respective storage modules are supplied to an output controller ICNT. A controller PR of the output controller ICNT determines the connection mode depending on whether a determination equation is satisfied. When the number of storage modules is set to N, the total output voltage is set to V(Total), the individual output voltages are set to V(), V(), . . . , and V(N), and the number of parallels of the connection mode is set to M, (determination equation: V()=V()= . . . =V(N)=(/M)&#xd7;V(Total)) is used. When the determination equation is satisfied, (N/M) parallel M series is determined.

Storage system and output controller

Control device, electric storage system, electronic device, electric vehicle, and electric power system to boot up a power source

The present disclosure provides an electric power supplying apparatus including: an electric storage device; and a control portion configured to control processing for mixing an output from the electric storage device, and an electric power of an external electric power system with each other in accordance with at least one of a peak shift command, a load electric power, and a remaining capacity of the electric storage device, wherein an alternating current electric power is formed in the mixing processing. When the electric power supplying apparatus further includes an electric power generating apparatus, processing for mixing an output from the electric power generating apparatus, an output from the electric storage device, and an electric power of the external electric power system with one another, is controlled.

Electric power supplying apparatus, electric power supplying method, inverter, and electric vehicle

Discharge is stopped when a voltage of a battery becomes smaller than a defined value or a remaining capacity of the battery reaches 0, and further, when power to a system cannot be maintained, the system is automatically shut down to be put into a shutdown state. When it is determined that the voltage of the battery or an SOC from a battery monitoris smaller than the defined value, a discharge control switchis turned off. A voltage Vx corresponding to a voltage between terminals Tand Tis input to an A/D port of a controllerand a value thereof is monitored. When it is determined that the voltage Vx input to the A/D port is smaller than a defined value, the controllerturns off a switch circuitto turn off power to the battery monitor

Storage system, electronic device, electric vehicle and power system

A power supply apparatus includes a plurality of power storage modules that are connected in parallel and a backup power storage module that is connected in parallel with the plurality of power storage modules. When charging or discharging of at least one of the power storage modules is disabled, charging of the other power storage modules is inhibited, discharging of the backup power storage module is permitted, states of charge of the backup power storage module and the other power storage modules are detected, and charging of the backup power storage module and the other power storage modules is permitted in accordance with the detected states of charge.

Power supply apparatus and power supply switching method

A power storage apparatus having a battery unit housed in a case includes external terminals of positive and negative poles for providing, from outside the case, electrical connection to corresponding positive and negative poles of the battery unit; and electronic parts, wherein only when a connection with the battery unit is cut from at least one of the external terminals of both the poles, the electronic parts can be accessed.

Power storage apparatus, connection apparatus, power storage system, electronic device, motor-driven vehicle, and electric power system

There is provided an electric circuit including a semiconductor switch that is inserted in a positive side power line; and converting means for converting an input voltage input to an input side terminal to a predetermined output voltage and for outputting the output voltage from an output side terminal, wherein the output side negative terminal of the converting means is connected to the positive side power line, and the output side positive terminal of the converting means is connected to a terminal that controls an opening and closing of the semiconductor switch.

Electric circuit, charge control device, charge system, and control method

A battery system includes a battery pack configured to include at least a plurality of battery cells that are connected in series, a monitor that monitors a state of the plurality of battery cells, and a controller to which an output of the monitor is supplied, a battery pack module in which the battery pack in a first order to the battery pack in an Nth order are connected in series, and an integrated controller that is connected with the battery pack in the first order of the battery pack module. Isolators are respectively disposed among the battery pack in the first order to the battery pack in the Nth order, and a signal is transmitted from the battery pack in an order of n&#x2212;1 (N&#x2267;n&#x2267;2) to the battery pack in an order of n via one of the isolators.

Multi-battery pack battery system with direct communication between controller and the battery packs

After the initiation of writing, an output signal from an LPF is sampled in correspondence with a portion with a predetermined pulse width of recording data, so as to obtain a pit level. In the resultant signal, its varying portions which correspond to the multi-pulse trains of the write signal are smoothed. A controller modifies a level of a target level signal to be supplied to an APC circuit in such a manner that the pit level becomes an optimum pit level which has been obtained prior to the initiation of writing.

Growing community of inventors

Kanagawa, Japan

Eiji Kumagai