Sony Corporation

Murata Manufacturing Co., Ltd.

Tohoku Murata Manufacturing Co., Ltd.

Noritoshi Imamura

Naoyuki Sugeno

Koji Umetsu

Kohki Watanabe

Katsumi Kobori

Yusuke Suzuki

Eiji Kumagai

Hiroaki Ono

Kazumi Sato

Atsushi Ozawa

Shuichi Takizawa

Kazuharu Yanagihara

Atsushi Minami

Masumi Terauchi

Raghunath Bellala

Hisato Asai

Nobuo Sato

Takuma Hashimoto

Masayuki Yasuda

Yuji Sekikawa

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

Provided is a power storage apparatus, including: series circuits, the series circuits being formed of first coils and first switching elements, the first coils and the first switching elements being connected to a plurality of battery units in parallel; second coils electromagnetically coupled to the first coils; second switching elements connected to the second coils in series; a capacitor inserted between two common power source lines for commonly supplying voltage to both ends of the series circuits of the second coils and the second switching element related to the plurality of battery units; and a control unit that supplies a control pulse signal to the first switching element and the second switching element for equalizing voltage of each of the plurality of battery units, in which an amount of charge obtained by dividing an amount of transferred charge necessary for eliminating a voltage difference between the first battery unit and the second battery unit into 10 or more is transferred by switching operations of the first and second switching elements.

Power storage apparatus, electronic apparatus, electric vehicle, and electric power system

Provided is an electric storage system including: a plurality of electric storage devices including a plurality of modules, a battery management unit, and a line concentrator connected with the battery management unit; wherein the plurality of modules include a battery unit, a voltage measurement unit, a temperature measurement unit and a current measurement unit, and wherein the battery management unit is configured to control at least one of the plurality of electric storage devices based on an instruction transmitted from the line concentrator.

Electric storage system

A power storage apparatus includes a plurality of power storage modules connected in series and a control apparatus that controls each power storage module. The power storage module includes a battery section, a controller, a communication unit, a first insulator that insulates the controller from the communication unit, and a second insulator having a withstand voltage higher than a withstand voltage of the first insulator. The second insulator is provided between the communication unit of each power storage module and the control apparatus.

Power storage module, power storage apparatus, power storage system, control method, electronic apparatus, electric vehicle, and electric power system

A power storage device includes: power storage units each including at least one battery, the power storage units being connected in series; cell balance units connected in parallel to the respective power storage units via switches; and a control unit that performs control to charge the power storage units with a first constant current value, and, when the power storage unit having the highest voltage among the power storage units reaches a first potential, connect the corresponding one of the cell balance units to the power storage unit having the highest voltage, and switch the charging current to a second constant current value that is smaller than the first constant current value.

Power storage device and method of controlling power storage device

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

There is provided a power supply circuit including a first series regulator including a first semiconductor element and a first constant voltage source, and a second series regulator including a second semiconductor element and a second constant voltage source, wherein the first series regulator and the second series regulator are cascaded and an input voltage to the first series regulator is a high voltage equal to or greater than 500 V.

Power supply circuit, power supply system, and electric storage device

A power factor is improved using a simplified structure without particularly providing a power factor improving circuit, and high efficiency is obtained. For this purpose, one terminal of a direct-current power source, from which a pulsating current is obtained, is connected through a choke coilto one end of an auxiliary coilconstituting a converter transformer; the other end of the auxiliary coilis connected to the other terminal of the direct-current power sourcethrough a series circuit of a diodeand a capacitor; a connection midpoint between the diodeand the capacitoris connected to one end of a primary coilof the converter transformer; the other end of the primary coilis connected to the other terminal of the direct-current power sourcethrough a switching element; a secondary coilof the converter transformeris connected to direct-current voltage output terminalsandthrough a rectifying circuit; the direct-current voltage output terminalis connected to an input side of a pulse width modulation control circuit; and an output terminal of the pulse width modulation control circuitis connected to a control electrode of the switching element

Power supply circuit and electronic equipment

The object of the present invention is to improve the power factor and at the same time to obtain a high efficient operation. It is constituted such that one terminal of a DC power supplyfrom which a pulsating flow is obtained is connected to a connection mid point of one terminal of a primary windingand the other terminal of an auxiliary windingwound in phase on a converter transformerby means of a series circuit of a choke coiland a first diodeone terminal of the auxiliary windingof the converter transformeris connected to the other terminal of the DC power supplythrough a first capacitorand at the same time the other terminal of the primary windingis connected to the other terminal of the DC power supplythrough a switching devicea secondary windingwound in counter phase with the primary windingfor the converter transformeris connected to a DC voltage output terminalthrough a rectifying circuitthe DC voltage output terminalis connected to an input side of a pulse width modulation control circuitand an output terminal of the pulse width modulation circuitis connected to a control electrode of the switching device

Power supply circuit and electronic apparatus

A booster type converter (,) wherein a boosting inductor is constituted from a transformer (,) provided with an auxiliary winding (,), a capacitor (,) is connected to the auxiliary winding, whereby the capacitor is charged by means of resonance of a leakage inductance of the transformer (,) and the capacitor (,), and at the same time, it makes possible to conduct zero voltage switching of the booster type converter (,) on the basis of the electric charge charged in the capacitor, whereby it is intended to attain high efficiency in the booster type converter.

Booster type converter with low power loss

In a switching power supply, primary-side MOS transistors are alternately turned on, so that a resonant current flows into the primary winding of a transformer and an alternate power is transferred to the secondary side. The alternate voltage generated at the secondary winding is applied by the voltage generated at the wound-up secondary winding to the gates of secondary-side MOS transistors such that they are turned on respectively in periods when the polarity of the voltage is positive. Rectified currents flow into a capacitor through a choke coil to perform synchronous rectification. If the voltage of a smoothing capacitor becomes higher than the alternate output voltage when the transformer is inverted, reverse currents flow into the secondary-side MOS transistors. With the counterelectromotive force of the choke coil, the reverse currents flowing when the transformer is inverted are suppressed, and the efficiency of the switching power supply is prevented from decreasing.

Current-resonant switching power supply

In a switching power source, by alternately turning on the first and second MOS transistors, a resonance current flows to a primary winding of a transformer, and an alternate current is transmitted to a secondary side. With respect to an alternate signal generated in a secondary winding, a gate voltage is applied so that the third MOS transistor and the fourth MOS transistor are conductive, respectively, while the polarity of the alternate signal is positive. Rectifying currents are flowed to a capacitor and a full-wave rectification is executed. Since a control signal for synchronous control is supplied from a signal source to control the first and second switching elements via transformers, a switching timing can be accurately coincided with an on/off timing of a synchronous rectifying device by a simple circuit. The efficiency of a current resonance type switching power source is thus improved.

Current resonance type switching power source

In a switching power source, by alternately turning on first and second MOS transistors, a switching current flows to a primary winding of a transformer, and an alternate current is transferred to a secondary side. The alternate voltage caused in a secondary winding is full-wave rectified by first and second diodes. Resonance elements (capacitor and coil) are connected to a tertiary winding coupled to an isolation transfer, thereby enabling the primary side to be set into a resonated state and to be set to a current resonance type switching power source. Since a leakage inductance of the transformer is not set to a resonance element, an interval between the windings of the isolation transformer can be closely coupled. Since a resonance current is not directly turned on/off, a peak value of the primary current is decreased and switching loss and loss due to an on-resistance can be decreased. The efficiency of a current resonance type switching power source is thus improved.

Growing community of inventors

Miyagi, Japan

Noritoshi Imamura