Abstract: Provided is a voltage measuring device capable of increasing the degree of freedom in the design of an RC filter (low-pass filter) while suppressing the withstand voltage limit of a capacitor. The voltage measuring device comprises: at least one divided capacitor group having a plurality of divided capacitors connected in series through measurement nodes and having one end connected to a reference node and the other end connected to a non-reference node; and at least one non-divided capacitor having one end connected to the reference node and the other end connected to a non-reference node to which the divided capacitors are not connected.

Abstract: A first direct-current power converter circuit increases an electrical potential difference between a positive electrical potential of a load and a positive electrical potential of a power source by a step-up operation, and a second direct-current power converter circuit increases an electrical potential difference between a negative electrical potential of the load and a negative electrical potential of the power source by a step-up operation. A control device controls switching operations of first and second switching devices included in the first direct-current power converter circuit based on a first duty. The control device controls switching operations of third and fourth switching devices included in the second direct-current power converter circuit based on a second duty. The control device controls a load voltage to be an arbitrary voltage, which is equal to or more than a source voltage.

Abstract: When a control device simultaneously drives first and second direct-current power converter circuits, the control device can arbitrarily control a first voltage and a second voltage, and a load voltage by changing at least one of first and second duties. The control device generates a loop current, which discharges a first power source and charges a second power source, or a loop current, which charges the first power source and discharges the second power source, in a loop circuit where a first reactor and a second reactor are connected in series.

Abstract: A control device controls first and second direct-current power converter circuits so that a switching operation for at least one of a pair of first and second switching devices included in the first direct-current power converter circuit and a pair of first and third switching devices included in the second direct-current power converter circuit is performed. The control device controls a switching operation of the first switching device and the second switching device included in the first direct-current power converter circuit based on a first duty. In the switching operation, the first switching device and the second switching device are inverted and the alternative close and open (ON/OFF) switching operations of each first and second switching device are performed. The control device controls a switching operation of the first switching device and the third switching device included in the second direct-current power converter circuit based on a second duty.

Abstract: Provided is a charging and discharging device that does not need to use a high voltage capacitor even if a shielding switch is provided in an assembled battery for the sake of convenience of maintenance, and the like. The charging and discharging device includes: capacitors for connecting control terminals of adjacent circuit blocks, the shielding switch interposed between the adjacent battery modules, and a transformer interposed between the control terminals corresponding to the adjacent battery modules.

Abstract: A first converter circuit 11 controls a voltage, applied between a first electrical potential point P1 and a fourth electrical potential point P4, to be within a range from a first voltage VB1 or a second voltage VB2 to a summed voltage (VB1+VB2) of the first voltage VB1 and the second voltage VB2, and/or controls the voltage, applied between the first electrical potential point P1 and the fourth electrical potential point P4, to be equal to or more than the summed voltage (VB1+VB2) of the first voltage VB1 and the second voltage VB2.

Abstract: A power supply device includes a plurality of power supply units connected in parallel, and includes a positive electrode-side junction formed by the joining of positive electrode-side terminals of the plurality of power supply units and a negative electrode-side junction formed by the joining of negative electrode-side terminals of the plurality of power supply units. Each of the plurality of power supply units includes a battery unit, and a first relay that is provided between one of the positive and negative electrode-side junctions and the battery unit and is electrically disconnectably connected in series to the battery unit. Each of the plurality of power supply units includes a resistive element of which one end is connected between the first relay, which is connected to one of a positive electrode terminal and a negative electrode terminal of the battery unit, and the battery unit.

Abstract: A charge controller for controlling the charging of a battery provided inside a vehicle using a control signal supplied from an external power source apparatus via a power cable includes a control section for controlling the charging of the battery and an activating section for activating the control section inside the vehicle. The external power source apparatus switches the control signal from a non-oscillation state to an oscillation state when the preparation for power supply is completed. The activating section has an oscillation state judgment section for judging whether the input control signal is in the oscillation state or the non-oscillation state and for outputting an oscillation state judgment signal and an activating signal generation section for generating an activating signal for activating the control section when the oscillation state judgment signal is switched from a state indicating non-oscillation to a state indicating oscillation.

Abstract: A control device controls first and second direct-current power converter circuits so that a switching operation for at least one of a pair of first and second switching devices included in the first direct-current power converter circuit and a pair of first and third switching devices included in the second direct-current power converter circuit is performed. The control device controls a switching operation of the first switching device and the second switching device included in the first direct-current power converter circuit based on a first duty. In the switching operation, the first switching device and the second switching device are inverted and the alternative close and open (ON/OFF) switching operations of each first and second switching device are performed. The control device controls a switching operation of the first switching device and the third switching device included in the second direct-current power converter circuit based on a second duty.

Abstract: A first converter circuit 11 controls a voltage, applied between a first electrical potential point P1 and a fourth electrical potential point P4, to be within a range from a first voltage VB1 or a second voltage VB2 to a summed voltage (VB1+VB2) of the first voltage VB1 and the second voltage VB2, and/or controls the voltage, applied between the first electrical potential point P1 and the fourth electrical potential point P4, to be equal to or more than the summed voltage (VB1+VB2) of the first voltage VB1 and the second voltage VB2.

Abstract: A first direct-current power converter circuit increases an electrical potential difference between a positive electrical potential of a load and a positive electrical potential of a power source by a step-up operation, and a second direct-current power converter circuit increases an electrical potential difference between a negative electrical potential of the load and a negative electrical potential of the power source by a step-up operation. A control device controls switching operations of first and second switching devices included in the first direct-current power converter circuit based on a first duty. The control device controls switching operations of third and fourth switching devices included in the second direct-current power converter circuit based on a second duty. The control device controls a load voltage to be an arbitrary voltage, which is equal to or more than a source voltage.

Abstract: When a control device simultaneously drives first and second direct-current power converter circuits, the control device can arbitrarily control a first voltage and a second voltage, and a load voltage by changing at least one of first and second duties. The control device generates a loop current, which discharges a first power source and charges a second power source, or a loop current, which charges the first power source and discharges the second power source, in a loop circuit where a first reactor and a second reactor are connected in series.

Abstract: Provided is a voltage measuring device capable of increasing the degree of freedom in the design of an RC filter (low-pass filter) while suppressing the withstand voltage limit of a capacitor. The voltage measuring device comprises: at least one divided capacitor group having a plurality of divided capacitors connected in series through measurement nodes and having one end connected to a reference node and the other end connected to a non-reference node; and at least one non-divided capacitor having one end connected to the reference node and the other end connected to a non-reference node to which the divided capacitors are not connected.

Abstract: Provided is a charging and discharging device that does not need to use a high voltage capacitor even if a shielding switch is provided in an assembled battery for the sake of convenience of maintenance, and the like. The charging and discharging device includes: capacitors for connecting control terminals of adjacent circuit blocks, the shielding switch interposed between the adjacent battery modules, and a transformer interposed between the control terminals corresponding to the adjacent battery modules.

Abstract: During charging of a cell module in which a plurality of cells are connected in series, a voltage is applied in forward polarity to a switch element even when a current interrupting switch provided to the cell module is open, thereby shorting an anti-fuse element, and the switch element is thereby opened. A voltage monitoring circuit and a vehicle equipped with the voltage monitoring circuit are thereby provided in which a high voltage is not applied even when the cell module is charging when the current interrupting switch is open.

Abstract: A power supply apparatus includes: a plurality of power supply units; a positive polarity coupling portion; and a negative polarity coupling portion; each of the power supply units is provided with: battery units; first relays connected in series to the battery units, capable of disconnecting electrical connection between the battery units and any one of the positive polarity coupling portion and the negative polarity coupling portion; resistor elements having one ends which are connected to the battery units between the battery units and the first relay; a resistor coupling portion; and a second relay connected to the resistor coupling portion, capable of disconnecting electrical connection between the resistor coupling portion and any one of the positive polarity coupling portion and the negative polarity coupling portion which is connected to the first relays, the second relay having fewer in number than the number of the power supply units.

Abstract: A power supply apparatus includes: a plurality of power supply units; a positive polarity coupling portion; and a negative polarity coupling portion; each of the power supply units is provided with: battery units; first relays connected in series to the battery units, capable of disconnecting electrical connection between the battery units and any one of the positive polarity coupling portion and the negative polarity coupling portion; resistor elements having one ends which are connected to the battery units between the battery units and the first relay; a resistor coupling portion; and a second relay connected to the resistor coupling portion, capable of disconnecting electrical connection between the resistor coupling portion and any one of the positive polarity coupling portion and the negative polarity coupling portion which is connected to the first relays, the second relay having fewer in number than the number of the power supply units.

Abstract: During charging of a cell module in which a plurality of cells are connected in series, a voltage is applied in forward polarity to a switch element even when a current interrupting switch provided to the cell module is open, thereby shorting an anti-fuse element, and the switch element is thereby opened.

Abstract: A power supplying apparatus for supplying power to a plurality of loads has been needed. Therefore, a power supplying apparatus for supplying power to a plurality of loads, including: a rectifying circuit connected to each of the plurality of loads; an AC circuit to sequentially connect between the rectifying circuits; and an AC generating circuit to apply AC voltage to the AC circuit, in which the AC circuit includes a capacitor and an inductor connected in series is provided.

Abstract: A charge controller for controlling the charging of a battery provided inside a vehicle using a control signal supplied from an external power source apparatus via a power cable includes a control section for controlling the charging of the battery and an activating section for activating the control section inside the vehicle. The external power source apparatus switches the control signal from a non-oscillation state to an oscillation state when the preparation for power supply is completed. The activating section has an oscillation state judgment section for judging whether the input control signal is in the oscillation state or the non-oscillation state and for outputting an oscillation state judgment signal and an activating signal generation section for generating an activating signal for activating the control section when the oscillation state judgment signal is switched from a state indicating non-oscillation to a state indicating oscillation.