Abstract: A plurality of battery cells (100) are connected in series to each other. A temperature measurement unit (300) measures temperatures of two or more battery cells (100). A battery control unit (400) controls charge and discharge of the battery cells (100) on the basis of the temperatures measured by the temperature measurement unit (300). In addition, when the charge of the battery cells (100) is performed or the discharge of the battery cells (100) is performed, the battery control unit (400) specifies a lowest temperature cell having the lowest temperature and a highest temperature cell having the highest temperature, on the basis of the temperatures measured by the temperature measurement unit (300). In addition, the battery control unit (400) continues the charge or discharge, as it is, when a first condition in which a temperature difference ?T between the highest temperature cell and the lowest temperature cell is equal to or greater than a reference value T1 is not satisfied.

Abstract: In a switchgear in which cables are used on both of the input side and the output side for connection between a main circuit and an external main circuit, a circuit breaker and connection conductors of the switchgear are stored in a box-shaped pressure tank together with insulating gas; an operating mechanism that performs opening and closing operation of the circuit breaker and a first cable connection portion that is connected to the connection conductors are attached to one face of the pressure tank; and a second cable connection portion that is connected to the connection conductors is attached to the other face of the pressure tank, the other face being parallel with respect to a direction connecting the operating mechanism and the circuit breaker.

Abstract: Provided is a battery pack capable of solving a problem in which driving becomes unstable. Switches (21, 22) switch between starting and stopping the current flow between secondary battery cells (11) and an external device. Detectors (23 to 26) detect a state value indicating a state of the battery pack (200). A manager (27) determines whether or not an abnormality has occurred in the battery pack based on the state value, and if an abnormality has occurred, transmits an abnormality signal indicating the occurrence of abnormality to the external device, and subsequently after a predefined delay time passes, outputs an interruption instruction to interrupt the current flow between the secondary battery cells (11) and the external device. An interrupter (26) interrupts the current flow between the secondary battery cells (11) and the external device via the switches (21, 22) if the interruption instruction is outputted. The delay time is five or more seconds.

Abstract: Provided is a battery pack capable of more reliably preventing adverse effects from being externally exerted. MCU (26) measures, as index values pertaining to the deterioration state of battery unit (1), at least two or more from among: a capacity reduction rate that is the reduction rate of the full-charge capacity of battery unit (1) from an initial value; a cycle count representing the number of times that a cycle, in which battery unit (1) is charged until the cumulative value of charge quantities charged to battery unit (1) reaches a prescribed charge quantity, has been performed; the number of times that battery unit (1) has been charged; time elapsed from the manufacturing of battery unit (1); cell voltages that are the voltages of secondary battery cells 11; and determines whether battery unit (1) has reached its end of life by using the measured index values. Monitoring IC 25 suspends the use of battery unit (1) when battery unit (1) has reached its end of life.

Abstract: A gas insulated switchgear includes a vacuum interrupter having a movable contact and a fixed contact in vacuum. The movable contact is on one side of a movable conductor that passes through a bellows. An insulating rod is coupled to the other side of the movable conductor that passes through the bellows. The insulating rod and the other side of the movable conductor are placed in an insulator. The vacuum interrupter, the insulating rod, and the insulator are disposed in a gas tank. An operating mechanism is disposed on a movable side end portion of the gas tank and connected to the insulating rod. An inner circumferential side space of the bellows, an internal space of the insulator, and an internal space of the operating box are in communication with each other; and pressure in these spaces is lower than pressure in the gas tank.

Abstract: A gas insulated switchgear includes: gas tanks filled with insulating gas; a circuit breaker which is arranged such that the shaft center direction of a driving shaft thereof is parallel to a front portion of the gas tank and horizontal; a first disconnecting switch which is arranged on the lower side of the circuit breaker and is electrically connected to the circuit breaker; a busbar whose one end is connected to the circuit breaker and the other end is extended in the shaft center direction of the driving shaft of the circuit breaker; a second disconnecting switch electrically connected to the busbar; a cable terminal led out outside the gas tank from the first disconnecting switch; and a cable terminal led out outside the gas tank from the second disconnecting switch.

Abstract: A circuit breaker is accommodated in a circuit breaker compartment such that a contacting/separating direction of a contact of the circuit breaker is along a vertical direction, a cable terminal of a first cable connected to one terminal of the circuit breaker via a first disconnector is accommodated in a first connection compartment such that a central conductor of the cable terminal is along the vertical direction, and a disconnector compartment which accommodates the first disconnector such that a contacting/separating direction of a contact of the first disconnector is along the vertical direction, is joined so as to be disposed between the circuit breaker compartment and the first connection compartment.

Abstract: Provided are: a vacuum valve having a fixed contact and a movable contact; a fixed side mounting plate which supports a fixed side conductor; and an operating mechanism which is coupled to a movable side conductor and performs opening and closing operation of both the contacts. The fixed side mounting plate is configured such that a plurality of plate-like members are overlapped; an exposed portion of the fixed side conductor is attached with a divided terminal which has a fitting hole to be fitted to the exposed portion and is formed with a slit in a radial direction from the fitting hole; and the divided terminal is fixed to the fixed side mounting plate and the fixed side conductor is supported by the fixed side mounting plate via the divided terminal.

Abstract: An object of the present invention is to obtain a resin molded bushing which can easily perform positioning of an electric field relaxation shield in a switchgear. The resin molded bushing includes: an electric field relaxation shield which concentrically surrounds the outer periphery of an internal conductor made of conductor; a cast resin which covers the internal conductor and the electric field relaxation shield; and an elastic member which is disposed on the outer periphery of the electric field relaxation shield and is embedded in the cast resin. The height of the elastic member is equal to the thickness of the cast resin which covers the electric field relaxation shield.

Abstract: A measurement unit (200) measures voltages and currents of battery cells (100). A battery control unit (400) calculates a present estimation value of a residual capacity of the battery cells (100) by integrating the currents. The voltages of the battery cells (100) are set to a reference voltage value V1 serving as a trigger of a process of correcting the estimation value of the residual capacity and an alarm voltage value Va which is a voltage higher than the reference voltage value. In addition, the battery control unit (400) continues discharge of all the battery cells (100), as it is, when an alarm condition in which a voltage of a minimum capacity cell is equal to or less than the alarm voltage value is not satisfied, and outputs a first signal when the voltage of the minimum capacity cell satisfies the alarm condition.

Abstract: A battery control unit (400) controls charge and discharge of battery cells (100) on the basis of temperatures measured by a temperature measurement unit (320) and voltages measured by the voltage and current measurement unit (340). In addition, the battery control unit (400) specifies a lowest temperature cell having the lowest temperature and a highest temperature cell having the highest temperature on the basis of the temperatures measured by the temperature measurement unit (320), when a current is greater than 0. In addition, the battery control unit (400) performs balance control for equalizing voltages of all the battery cells (100), on the basis of the voltages measured by the voltage and current measurement unit (340), when a first temperature condition in which a temperature difference ?T between the highest temperature cell and the lowest temperature cell is equal to or greater than a reference value T1 is not satisfied.

Abstract: A battery pack (10) includes a plurality of battery cells (100) which are connected in series to each other, a voltage and current measurement unit (voltage and current measurement unit (200)), a temperature measurement unit (temperature measurement unit (300)), and a calculation unit (calculation unit (420)) provided in an arithmetic operation communication unit (400). The calculation unit (420) calculates a “first electric energy balance” of the battery cells (100) on the basis of voltages and currents, determines internal resistances of the battery cells (100) on the basis of the temperatures, and calculates a “second electric energy balance” of the internal resistances on the basis of currents and the internal resistances.

Abstract: A battery pack (10) includes a plurality of battery cells (100), a measurement unit (measurement unit (200)), and a battery control unit (battery control unit (400)). The plurality of battery cells 100 are connected in series to each other. The measurement unit (200) measures voltages of the battery cells (100). The battery control unit (400) controls discharge of the battery cells (100) on the basis of the voltages measured by the measurement unit (200). In addition, when the battery cells (100) perform the discharge, the battery control unit (400) specifies a minimum voltage cell in which the voltage is lowest on the basis of the voltages measured by the measurement unit (200). Further, before the minimum voltage cell is over-discharged, the battery control unit (400) outputs a first signal for reducing a discharge current in the discharge.

Abstract: A plurality of battery cells (100) are connected in series to each other. A temperature measurement unit (300) measures temperatures of two or more battery cells (100). A battery control unit (400) controls charge and discharge of the battery cells (100) on the basis of the temperatures measured by the temperature measurement unit (300). In addition, when the charge of the battery cells (100) is performed or the discharge of the battery cells (100) is performed, the battery control unit (400) specifies a lowest temperature cell having the lowest temperature and a highest temperature cell having the highest temperature, on the basis of the temperatures measured by the temperature measurement unit (300). In addition, the battery control unit (400) continues the charge or discharge, as it is, when a first condition in which a temperature difference ?T between the highest temperature cell and the lowest temperature cell is equal to or greater than a reference value T1 is not satisfied.

Abstract: In a switchgear in which cables are used on both of the input side and the output side for connection between a main circuit and an external main circuit, a circuit breaker and connection conductors of the switchgear are stored in a box-shaped pressure tank together with insulating gas; an operating mechanism that performs opening and closing operation of the circuit breaker and a first cable connection portion that is connected to the connection conductors are attached to one face of the pressure tank; and a second cable connection portion that is connected to the connection conductors is attached to the other face of the pressure tank, the other face being parallel with respect to a direction connecting the operating mechanism and the circuit breaker.

Abstract: A pressure tank which seals and contains an electrical device, is formed with an opening portion corresponding to a terminal portion provided on the electrical device. A porcelain tube which is disposed so as to protrude with respect to the pressure tank, is fixed to the opening portion at a base portion thereof, and is provided with a terminal conductor at a leading end portion thereof. A first connection conductor is led out into a center portion of the porcelain tube at one end thereof, and is connected to the terminal conductor at the other end thereof. A second connection conductor which has a concave section to be fitted onto the first connection conductor at one side thereof, is connected to the terminal portion at the other side thereof. A contact is disposed between the first connection conductor and the concave section of the second connection conductor.

Abstract: A battery pack that has multiple battery units that differ in full charge capacity is charged and discharged to the maximum. A method of manufacturing the battery pack includes the following steps. First, battery cells that differ in full charge capacity are individually charged to be charged up to the full charge capacity (a charge step, S120). Subsequently, the multiple battery cells that become charged to the full charge capacity are connected in series to one another (a connection step, S130).

Abstract: A tank-type vacuum circuit breaker includes: a pressure tank; an insulating frame that is detachably supported by a support member provided in the pressure tank using a coupling; a vacuum interrupter that is supported by the insulating frame and includes a stationary electrode and a moving electrode; a stationary-electrode side terminal that is connectably/disconnectably connected to a bushing-terminal side internal conductor; a moving-electrode side terminal that is connectably/disconnectably connected to a bushing-terminal side internal conductor; and an insulating rod, the inside end of which is detachably coupled to the moving electrode and the outside end of which is coupled to an opening/closing actuation mechanism that opens/closes the contacts of the stationary contact and moving contact.

Abstract: A gas insulated switchgear includes a vacuum interrupter having a movable contact and a fixed contact in vacuum. The movable contact is on one side of a movable conductor that passes through a bellows. An insulating rod is coupled to the other side of the movable conductor that passes through the bellows. The insulating rod and the other side of the movable conductor are placed in an insulator. The vacuum interrupter, the insulating rod, and the insulator are disposed in a gas tank. An operating mechanism is disposed on a movable side end portion of the gas tank and connected to the insulating rod. An inner circumferential side space of the bellows, an internal space of the insulator, and an internal space of the operating box are in communication with each other; and pressure in these spaces is lower than pressure in the gas tank.

Abstract: A gas-insulated electric device, by which a cross-sectional area of a central conductor can be reduced. The gas-insulated electric device includes an insulation tube that ranges to portions facing to ground potential portions for a central conductor and to upper-lower portions along the grounding potential portions, and is coaxially arranged along the central conductor in a state where a gap intervenes between the central conductor and the insulation tube; a conductive layer that is formed on an inner surface of an insulation tube and is electrically connected to the central conductor; and a ground layer that is formed on an inner surface or an outer surface of the insulation tube and is grounded; in which heat generated from the central conductor is radiated by convecting the insulation gas through the gap between the central conductor and insulation tube.