Abstract: A protective device connected between an external terminal provided in an energy storage apparatus and a power cable extending from a vehicle, the protective device includes a current interruption device that interrupts electric conduction between the vehicle and the energy storage apparatus in response to a command of a CPU in a battery management device provided in the energy storage apparatus.

Abstract: A power supply device for a vehicle includes: a first energy storage device having a first energy storage element; a second energy storage device having a second energy storage element; a switch which switches between a state in which the first energy storage device and the second energy storage device are connected in parallel and a state in which the first energy storage device and the second energy storage device are separated from each other; and a switch controller. Each of the first energy storage element and the second energy storage element is an energy storage element having an SOC-OCV characteristic having a flat region thereon, and the switch controller switches the switch from an off-state to an on-state when each of the first energy storage element and the second energy storage element is in the flat region of the SOC-OCV characteristic.

Abstract: An energy storage apparatus for engine start-up includes: an energy storage device, a first switch provided in a first energizing path to the energy storage device, a step-down circuit provided in a second energizing path to the energy storage device, and a controller. The controller turns the first switch on to discharge through the first energizing path at engine start-up, and turns the first switch off to select the second energizing path if an output voltage of a vehicle generator is higher than a predetermined voltage to cause the output voltage of the vehicle generator to be stepped down with the step-down circuit to charge the energy storage device.

Abstract: Provided is a management device (BMS 40) for an assembled battery 30 which uses a positive electrode active material containing lithium iron phosphate and having an electrically conductive layer formed on a surface thereof, the BMS 40 being provided with: a current sensor 43 which measures a current flowing through the assembled battery 30; a voltage sensor 45 which measures a voltage of the assembled battery 30; and a management unit 42.

Abstract: Provided is a management device (BMS 40) for an assembled battery 30 which uses a positive electrode active material containing lithium iron phosphate and having an electrically conductive layer formed on a surface thereof, the BMS 40 being provided with: a current sensor 43 which measures a current flowing through the assembled battery 30; a voltage sensor 45 which measures a voltage of the assembled battery 30; and a management unit 42.

Abstract: A power supply protective device, includes: a first switch provided between a first terminal to which at least one of a load and a charger is connected and a second terminal to which a power supply is connected; a switching circuit connected in parallel to the first switch and including a second switch and a voltage drop element connected in series to the second switch, the voltage drop element causing a voltage drop of a reference voltage by a current flow; a voltage detection unit which detects at least one voltage of a first voltage as a voltage of the first terminal, a second voltage as a voltage of the second terminal, and a third voltage as a voltage at a point between the second switch and the voltage drop element; and a control unit.

Abstract: A battery includes an output terminal, an electric storage device, a relay connected to the output terminal and the electric storage device, and a monitoring apparatus including a detector and a controller, the detector being configured to detect a variation value corresponding to an amount of charge of the electric storage device, the controller receiving an engine activation signal and switching a state of the relay to a closed state. If an engine is not started, the controller switches the state of the relay to an open state.

Abstract: An energy storage apparatus includes: an energy storage device which is connected to a vehicle load and a vehicle power generator; a current interrupt device that causes the energy storage device and the vehicle load as well as the energy storage device and the vehicle power generator to be in a conduction state or in an interruption state; a voltage detection unit that detects voltage of the energy storage device; and a control unit. The control unit executes: a switching instruction process in which, when determining that the electric storage device will reach an overcharge state on the basis of the voltage, the control unit issues an interruption switching instruction to the current interrupt device; and an interruption maintaining process in which, when the number of times of the switching instruction process exceeds a predetermined value, the control unit issues an instruction to maintain the interruption state.

Abstract: An energy storage apparatus includes: an energy storage device; a voltage detecting unit for detecting a voltage of the energy storage device; an energization control unit for controlling energization of the energy storage device; and a control unit. The control unit performs a short-circuit detecting process for detecting an internal short-circuit based on a change in state of the energy storage device with charging of the energy storage device.

Abstract: A protective device connected between an external terminal provided in an energy storage apparatus and a power cable extending from a vehicle, the protective device includes a current interruption device that interrupts electric conduction between the vehicle and the energy storage apparatus in response to a command of a CPU in a battery management device provided in the energy storage apparatus.

Abstract: A battery includes an output terminal, an electric storage device, a relay connected to the output terminal and the electric storage device, and a monitoring apparatus including a detector and a controller, the detector being configured to detect a variation value corresponding to an amount of charge of the electric storage device, the controller receiving an engine activation signal and switching a state of the relay to a closed state. If an engine is not started, the controller switches the state. of the relay to an open state.

Abstract: A power supply protective device, includes: a first switch provided between a first terminal to which at least one of a load and a charger is connected and a second terminal to which a power supply is connected; a switching circuit connected in parallel to the first switch and including a second switch and a voltage drop element connected in series to the second switch, the voltage drop element causing a voltage drop of a reference voltage by a current flow; a voltage detection unit which detects at least one voltage of a first voltage as a voltage of the first terminal, a second voltage as a voltage of the second terminal, and a third voltage as a voltage at a point between the second switch and the voltage drop element; and a control unit.

Abstract: A power storage apparatus includes a plurality of power storage devices, a switch provided on a current-carrying path to the plurality of power storage devices, a voltage detecting unit that detects respective voltages of the power storage devices, and a control unit. The control unit switches a duty ratio of the switch so as to prevent or delay the voltages of the power storage devices from reaching an upper limit voltage during the charge.

Abstract: A power control method of an electric storage apparatus that includes an output terminal, an electric storage device connected to the output terminal via a power supply route in the electric storage apparatus, and a monitoring apparatus including a detector, a communication unit, and a controller, includes detecting a variation value corresponding to an amount of charge of the electric storage device, shutting down the power supply route in the electric storage apparatus, which connects the electric storage device to the output terminal, and causing the communication unit to receives an input signal from outside.

Abstract: A power supply protective device, when obtaining an open voltage when a second switch is brought into a closed state and a first switch is brought into an open state during discharging of a power supply, and obtaining a close voltage when the second switch is brought into the closed state and the first switch is brought into the closed state during discharging of the power supply, diagnoses the first switch as having a failure or not on the basis of the open voltage and the close voltage. When executing first a close instruction to the first switch and the second switch, if a voltage difference is less than a first threshold voltage, the first switch is determined to have no open failure, and/or when not less than a second threshold voltage, the second switch is determined to have no open failure.

Abstract: A method of charging an assembled battery, includes mechanically connecting two external terminals of an assembled battery and two connecting lines of a charging circuit, respectively, the assembled battery including a plurality of lithium ion battery cells connected in series, a lithium ion battery cell of the plurality of lithium ion battery cells including a positive electrode active material including a first lithium compound comprising iron, the two external terminals, and a first communicating unit. The method also includes electrically connecting the first communicating unit of the assembled battery to a second communicating unit of the charging circuit, charging the assembled battery through the two external terminals using a quasi-constant voltage charging procedure, and reducing a charging current toward a late stage during the charging of the assembled battery.

Abstract: An electric storage device protection apparatus includes switches arranged between an electric device and an electric storage device and connected in parallel to each other, and each of which being configured to be switched to be in an open state and a closed state, a rectifier component connected in series to one of the switches between a pair of common connection points of the switches, and a controller configured to perform a process to make the one of the switches that is connected to the rectifier component to be in the closed state and make another one of the switches to be in the open state when determining that the electric storage device is in a state where a voltage of the electric storage device becomes higher than a reference range.

Abstract: A power supply device for a vehicle includes: a first energy storage device having a first energy storage element; a second energy storage device having a second energy storage element; a switch which switches between a state in which the first energy storage device and the second energy storage device are connected in parallel and a state in which the first energy storage device and the second energy storage device are separated from each other; and a switch controller. Each of the first energy storage element and the second energy storage element is an energy storage element having an SOC-OCV characteristic having a flat region thereon, and the switch controller switches the switch from an off-state to an on-state when each of the first energy storage element and the second energy storage element is in the flat region of the SOC-OCV characteristic.

Abstract: A power storage apparatus includes a plurality of power storage devices, a switch provided on a current-carrying path to the plurality of power storage devices, a voltage detecting unit that detects respective voltages of the power storage devices, and a control unit. The control unit switches a duty ratio of the switch so as to prevent or delay the voltages of the power storage devices from reaching an upper limit voltage during the charge.

Abstract: An energy storage apparatus includes: an energy storage device; a voltage detecting unit for detecting a voltage of the energy storage device; an energization control unit for controlling energization of the energy storage device; and a control unit. The control unit performs a short-circuit detecting process for detecting an internal short-circuit based on a change in state of the energy storage device with charging of the energy storage device.