Sanyo Electric Co., Ltd.

Tomoyuki Matsubara

Jun Asakura

Kimihiko Furukawa

Masaki Yugou

Junya Yano

Hidetsugu Mukae

A first voltage detection circuit is connected by first voltage detection lines to each node in a plurality of cells connected in series and detects the voltage of each of the plurality of cells. A second voltage detection circuit is connected, by second voltage detection lines, to each node in the plurality of cells and detects the voltage of each of the plurality of cells. First capacitance elements are each connected between two first voltage detection lines connected to each cell. Second capacitance elements are each connected between two second voltage detection lines connected to each cell. A first charge drawing circuit draws charge from each node in the plurality of cells, via each first voltage detection line. A second charge drawing circuit draws charge from each node in the plurality of cells, via each second voltage detection line.

Management device and power supply device

A voltage detection circuit detects the voltage of a plurality of serially connected cells in a power storage unit. The voltage detection circuit receives a supply of a power supply voltage from both ends of the plurality of cells. A DC-DC converter converts the voltage between both ends of the plurality of cells into another DC voltage. An adjustment circuit adjusts the power consumption of the plurality of cells. The adjustment circuit operates using the DC voltage generated by the DC-DC converter as the power supply voltage.

Power storage unit and power storage system

A integrated circuit includes a plurality of first connection terminals () and second connection terminals () for receiving an input of electrical signals, a first detection section, a second detection section, a plurality of switches (), and a switch control section (). The first detection section is connected to first connection terminals () and obtains input electrical signals. The second detection section is connected to second connection terminals (). Each switch () connects adjacent second connection terminals () among second connection terminals () to each other, and are connected to each other in series. Switch control section () controls to turn off switches () and allows electrical signals input to second connection terminals () to be input to the second detection section, and controls to turn on any switch among switches () to bring adjacent second connection terminals () into electrical continuity.

Integrated circuit with built-in status monitoring unit and power supply device provided with said integrated circuit

A plurality of cascade-connected voltage detection ICs detect each voltage of a plurality of battery cells connected in series and constituting an assembled battery, through a plurality of voltage detection lines. Power sources receive power from the assembled battery, for supplying power to the plurality of the voltage detection ICs. Communication lines connect between the plurality of the voltage detection ICs. A controlling circuit is connected to at least one of the plurality of the voltage detection ICs. First to third dummy resistors are connected to each of one or more of the voltage detection ICs which are not directly communicated to the controlling circuit out of the plurality of the voltage detection ICs. First to third switches turn on or off current supply through the first to third dummy resistors.

Battery management device and power supply device

A power supply device includes: an assembled battery that is configured of N pieces of battery cells connected in series; (N+1) pieces of measurement lines that obtain analog signals corresponding to terminal potentials of the battery cells; a filter circuit that attenuates a specified frequency component of the inputted analog signals and outputs; and an analog/digital converter that converts the analog signals outputted from the filter circuit into digital signals. The filter circuit is configured of: (N+1) pieces of input terminals; (N+1) pieces of output terminals; (N+1) pieces of filter resistors; and (N+1) pieces of filter capacitors of which one ends respectively connected between the filter resistors and the output terminals and the other ends are connected to each other in common.

Power supply device including a filter circuit that attenuates a specified frequency component of analog signals corresponding to terminal potentials of battery cells connected in series

Growing community of inventors

Hyogo, Japan

Tomoyuki Matsubara