Murata Manufacturing Co., Ltd.

Sony Corporation

Masami Okada

Naoyuki Sugeno

Atsushi Minami

Kazumi Sato

Hiroaki Yoshida

Atsushi Chinen

Yasuhiro Watanabe

Ryo Tanabe

Katsumi Kobori

Shun Nagashima

Shunichi Nihei

Mohan Amit Saklani

Atsuo Fujita

A power supply apparatus includes a container including a first conductive material, a plurality of battery racks including a second conductive material, a plurality of electricity storage modules mounted on the battery racks and having grounded portions connected to the battery racks, and a grounding means configured to connect the battery racks to a ground outside the container.

Power supply apparatus

Provided is a power supply device including a rectifier configured to convert an alternating current power from a system into a direct current power and supply the direct current power to a power storage device and a load, and a current sensor configured to detect one or both of a first direct current from the rectifier to the load and a second direct current from the rectifier to the power storage device, in which a measurement result of the current sensor is configured to be fed back to the rectifier to control an output current of the rectifier.

Power supply device, power storage device, electronic device, and power system

A power supply device includes a photovoltaic power generator, a secondary battery unit, a charger configured to supply power from the photovoltaic power generator to the secondary battery unit, a DC-AC power conversion circuit configured to convert a discharge output of the secondary battery unit into AC power, and a control device configured to control charging of the secondary battery unit based on a load power prediction obtained by a moving average of used power and an amount of power generated by the photovoltaic power generator and perform control to switch output of the amount of power generated by the photovoltaic power generator between the secondary battery unit and a commercial system power based on a value of state of charge (SOC) of the secondary battery unit.

Power supply device and control device

A power supply apparatus includes a latch type first relay inserted between a system power supply and a load, where the latch type first relay includes a switch, a tripping coil configured to open the switch, and a closing coil configured to close the switch, an electricity storage system including a charging and discharging unit inserted between a secondary battery and the load, a non-latch type second relay including a contact and an operating coil configured to open and close the contact, where the operating coil is connected between the electricity storage system and the load, and a control circuit connected to the first relay via the contact of the second relay.

Power supply apparatus and electricity storage device

A power supply control device includes a control unit, and a power path that is connected to a primary external power system. If a connection state between the primary external power system and the power path is in a disconnected state, the control unit is configured to control power output of at least one power conditioner of at least one corresponding secondary external power generation unit, based on (a) an amount of power consumption of a specific load connected to the power supply control device through the power path, and (b) a power generation output of the secondary external power generation unit.

Power supply device, power supply system, and method of controlling power supply

An electric power supply device including: a first interposed between an electric power system and a predetermined load; a power storage system having a secondary battery, a first charging and discharging unit interposed between the secondary battery and the electric power system, and a second charging and discharging unit interposed between the secondary battery and the predetermined load; and a controller configured to control the first switch, the first charging and discharging unit, and the second charging and discharging unit, in which when system abnormality occurs, the controller causes the switch to open to disconnect between the electric power system and the predetermined load, causes the first charging and discharging unit to perform reverse power flow for a prescribed time, and causes the second charging and discharging unit to supply electric power to the predetermined load.

Electric power supply device, method for supplying electric power, and power storage device

Provided is an electric storage device including: a control unit, a charge/discharge management unit and a current generation unit, which are connected through an input/output unit; and an electric storage unit that is connected to the charge/discharge management unit and is connected to the current generation unit through a switch.

Electric storage device and start-up method

A charger includes input terminals whereto positive and negative voltages from a power source unit are applied, output terminals generating an output charging a secondary battery, upon being applied with the voltage from the input terminals via positive and negative power source lines, a first field effect type transistor and a second field effect type transistor having a region between a drain and a source inserted in at least one of the positive and negative power source lines, and having a first parasitic diode with a polarity reverse against charge current, and a second parasitic diode with a polarity forward direction with charge current respectively, a first detection circuit and a second detection circuit having series connections of a plurality of resistors inserted between the positive and negative power source lines, the first circuit is between the input terminals and the first transistor, and the second circuit is between the first transistor and the second transistor, and a charge control unit supplied with the first and second detection voltages, and generates ON/OFF control signals for the gates of the first and second transistors.

Charger and method of charging

The present invention provides a switching power supply which includes a main rectifying and smoothing circuit ( ) and a secondary rectifying and smoothing circuit ( ) for rectifying and smoothing an output obtained at a secondary coil ( ) of a converter transformer ( ) whose primary coil ( ) is supplied with a switching output from a switching element ( ) which switches a direct input. A error detecting circuit ( ), which is driven by a secondary rectified and smoothed output from the secondary rectifying and smoothing circuit ( ), detects a main rectified and smoothed output from the main rectifying and smoothing circuit ( ) to be supplied to loads so as to control the switching operation of the switching element ( ) by the PWM controlling circuit ( ) so that the main rectified and smoothed output is caused to be a predetermined state, and compares the voltage of the secondary rectified and smoothed output with the voltage of the main rectified and smoothed output so as to change the operation state of the PWM controlling circuit ( ) to the standby mode in case the voltage of the secondary rectified and smoothed output declines to come below the voltage of the main rectified and smoothed output by a predetermined value.

Growing community of inventors

Fukushima, Japan

Masami Okada