Abstract: A vehicle-mounted power supply system, a relay box, and a relay control apparatus that, when carrying out an updating process for a vehicle-mounted device, can suppress operations of vehicle-mounted devices not subject to the updating process. The system includes: a vehicle-mounted updating apparatus that carries out a process of updating a program or data stored in a storage unit of a vehicle-mounted device; one or more of a first type of relay disposed in a power supply path from a power supply source to a vehicle-mounted device not subject to the updating process; one or more of a second type of relay disposed in a power supply path from the power supply source to one or more vehicle-mounted devices that can be subject to the updating process; and a relay control apparatus that controls switching of the first type of relay and the second type of relay on/off.

Abstract: Provided is a relay device that is able to supply a charging current to at least two electrical storage units from a power generator. In a relay device, a first electrical storage unit-side conduction path is connected between a power generator-side conduction path and a first electrical storage unit, and a second electrical storage unit-side conduction path is connected between the power generator-side conduction path and a second electrical storage unit. A relay unit breaks electrical continuity between the first electrical storage unit and the second electrical storage unit when a first switch unit provided on the first electrical storage unit-side conduction path and a second switch unit provided on the second electrical storage unit-side conduction path are OFF. A control unit turns OFF the second switch unit when the first switch unit is ON, and turns OFF the first switch unit when the second switch unit is ON.

Abstract: A switch device that includes a first input terminal that is connected to a first battery; a second input terminal that is connected to a second battery; a first output terminal that is connected to a first load; a second output terminal and a third output terminal that are both connected to a second load; a first conductive path that is connected to the first input terminal; a first switch that includes one terminal that is connected to the first input terminal via the first conductive path, and further includes another terminal; a second conductive path that is connected to the second input terminal; and a second switch that includes one terminal that is connected to the second input terminal via the second conductive path, and further includes another terminal.

Abstract: Provided is a relay device that can switch conduction of a current flow path between power storage units on and off, and can suppress a decrease in the output of the power storage units if an abnormality occurs. A relay device includes: a conductive path between a first power storage unit and a second power storage unit, the conductive path serving as a path through which a current flows; a switch unit that is switched between an ON state in which a current can flow through the conductive path, and an OFF state in which the conductive path is in a predetermined no current flow state; a coil that is connected in series to MOSFETs constituting the switch unit, and has an inductance component; and a control unit configured to switch off the switch unit if a value detected by a current detection unit is a predetermined abnormal value.

Abstract: Provided is a relay device that can switch conduction of a current flow path between power storage units on and off, and can suppress a decrease in the output of the power storage units if an abnormality occurs. A relay device includes: a conductive path; a switch unit switched between an ON state, and an OFF state; a coil connected in series to the switch unit; a first voltage detection unit configured to detect a voltage of the conductive path at a position on a first power storage unit side; a second voltage detection unit configured to detect a voltage of the conductive path at a position on a second power storage unit side; and a control unit configured to switch the switch unit to the OFF state if a value detected by the first voltage detection unit and/or the second voltage detection unit indicates a predetermined abnormal value.

Abstract: A relay device includes a switch that switches a power line, serving as a path for power supplied from a first power storage device to a plurality of loads, between an electrified state and a non-electrified state; a first relay that switches a first conductive path, serving as a path from the switch to at least one specific load, between an electrified state and a non-electrified state; a second relay that switches a second conductive path, serving as a path between a second power storage device and the at least one specific load, between an electrified state and a non-electrified state; and a controller. When an abnormality has been detected by an abnormality detector, the controller causes the second relay to operate in a manner corresponding to the operation of the first relay that was being performed before detection of the abnormality.

Abstract: A charging rate monitoring apparatus for in-vehicle power supply configured to monitor charging rates of both a first power storage device and a second power storage device that supply power to a load via a power line, the apparatus including: a first switch connected between the power line and the first power storage device; a second switch connected between the power line and the second power storage device; a first monitoring circuit configured to output on/off signals to the first switch; and a second monitoring circuit configured to output on/off signals to the second switch.

Abstract: Provided is a power system that is able to readily address design changes, together with suppressing leakage current from a conduction path of a high voltage to a conduction path of a low voltage. A power system is provided with a voltage transformation device that steps down an input voltage to a 12V voltage that is lower than the 48V voltage and outputs the resultant voltage, a high-voltage power box that is electrically connected to the voltage transformation device and outputs electric power having a voltage of 48V, and a low-voltage power box that is electrically connected to the voltage transformation device and outputs electric power having a voltage of 12V, the voltage transformation device and the high-voltage power box being detachably connected to each other.

Abstract: An on-vehicle power source switch apparatus configured to switch off a switch when a ground fault occurs is provided. A first system includes a generator, a first power storage that powers a first vehicle load. A second system includes a second power storage device that powers a second vehicle load. A separation switch is connected between the first and the second systems. A first and a second control circuits respectively output a first and a second provisional control signals for controlling the separation switch. A logic circuit switches on the separation switch when both the first and the second provisional controls signal indicate on. When power is generated, the first and the second control circuits output respective first and second provisional control signals indicating on, and when a ground fault has occurred, the first and second control circuits output the first and second provisional control signals indicating off.

Abstract: Provided are a relay device and a power supply device that can switch on/off a current path between power storage units, and can suppress, if an earth fault has occurred on either power storage unit side, a voltage reduction on the other power storage unit side. A relay device includes: a serial structural portion in which a resistance unit and a switch unit are connected in series to each other; a relay unit that serves as a path for a current to flow between a first power storage unit and a second power storage unit when the switch unit is in the ON state; and a control unit configured to perform control of switching the switch unit of the relay unit.

Abstract: A voltage measurement device includes a relay, a first voltage measurement unit, a second voltage measurement unit, a power supply circuit, and a control circuit. The power supply circuit is indirectly connected to a direct current bus. The first voltage measurement unit measures a first voltage applied to the power supply circuit. A first end of the relay is connected to the direct current bus and a second end of the relay is connected to the power storage device. The control circuit receives operating power from the power supply circuit, controls opening and closing of the relay, and closes a path between the first end and the second end when the first voltage is lower than or equal to a first threshold value. The second voltage measurement unit measures a second voltage applied to the second end at least when the relay is in an open state.

Abstract: A system configured to avoid a power shortage while a vehicle is traveling is provided. A voltage measurement device includes a relay, a first voltage measurement unit measures a first voltage applied to the power supply circuit, a second voltage measurement unit, a power supply circuit, and a control circuit. The power supply circuit is indirectly connected to a direct current bus. A first end of the relay is connected to the direct current bus, whereas a second end is connected to the power storage device. The control circuit, controls opening and closing of the relay, and closes a path between the first end and the second end when the first voltage is lower than or equal to a first threshold value. The second voltage measurement unit measures a second voltage applied to the second end at least when the relay is in an open state.

Abstract: An automobile power supply device is provided with a first relay interposed between a first battery and a load group; a second relay interposed between second battery and the load group; a hood switch that detects the opening of a hood of an engine room and outputs a detection signal dt1; a luggage switch that detects the opening of a hood of a luggage room and outputs a detection signal dt2; and a power supply control unit that brings the first relay into a non-conductive state based on the detection signal output by the hood switch, and brings the second relay into a non-conductive state based on the detection signal output by the luggage switch.

Abstract: An in-vehicle power supply apparatus supplies power to an external load while bypassing the occurrence of an overcurrent, even when there is a failure on a main battery side or a failure on a sub-battery side includes a main battery and a sub-battery and two relays. One of the relays is connected to the main battery via the other relay, and transitions from a closed to an open state when an overcurrent flows thereto after the other relay transitions from the closed state to the open state. The other relay transitions from the closed state to the open state when an overcurrent flows thereto. The sub-battery is connected to the main battery via both of the relays. The main battery is connected to a backup load, bypassing both of the relays. A sub-power supply path connects the sub-battery and the backup load via the one relay.

Abstract: Provided is an in-vehicle power supply apparatus that is able to reduce manufacturing cost even while providing a plurality of power storage devices. A converter outputs DC power. A first power storage device and a second power storage device are charged via the converter. A first switch selects on/off between the converter and the first power storage device. A second switch selects on/off between the converter and the second power storage device. A voltage monitoring circuit detects a DC voltage on the output side of the converter, at a point closer to the converter than are the first switch and the second switch.

Abstract: An automobile power supply device is provided with a first relay interposed between a first battery and a load group; a second relay interposed between second battery and the load group; a hood switch that detects the opening of a hood of an engine room and outputs a detection signal dt1; a luggage switch that detects the opening of a hood of a luggage room and outputs a detection signal dt2; and a power supply control unit that brings the first relay into a non-conductive state based on the detection signal output by the hood switch, and brings the second relay into a non-conductive state based on the detection signal output by the luggage switch.

Abstract: An automobile power distribution apparatus includes: a first wireless apparatus that includes a first wireless power supply unit, is disposed in an engine room, and receives a supply of power from a battery disposed in the engine room; a second wireless apparatus that includes a second wireless power supply unit and is disposed in a vehicle interior; and a power distribution apparatus configured to supply power supplied to the second wireless apparatus to an electrical device disposed in the vehicle interior. The first and second wireless power supply units are configured to perform wireless power supply from the first wireless apparatus to the second wireless apparatus, and the first and second wireless apparatuses are disposed so as to be near a partition between the engine room and the vehicle interior, or to be in contact with the partition.

Abstract: A battery comprises: a plurality of cells each of which has two electrodes; a control unit with a circuit board; and a housing that contains the cells and the control unit. The housing is provided with a first terminal and a second terminal. The cell, which is disposed closest to the first terminal, is connected to the first terminal; and the cell, which is disposed adjacent to the control unit, is connected to the second terminal via the control unit. Among the cells and the control unit, the control unit is disposed closest to the second terminal. A bus bar is provided between the cell and the cell so as to serve as a folding portion that folds back the current path between the first and second terminals.

Abstract: An automotive power unit includes a plurality of storage batteries; a power supply box arranged between the storage batteries and a load; a switch means that is provided in the power supply box and selects whether or not to supply power to the load from the storage batteries; and a switch control unit that detects output voltages of the storage batteries and controls the opening and closing of the switch means so as to select a storage battery for supplying power to the load. The switch control unit enables, based on a control signal that is output from a load control unit when the load is driven, a storage battery selecting operation to be performed by the switch means.

Abstract: An automobile power supply device is provided with a first relay interposed between a first battery and a load group; a second relay interposed between second battery and the load group; a hood switch that detects the opening of a hood of an engine room and outputs a detection signal dt1; a luggage switch that detects the opening of a hood of a luggage room and outputs a detection signal dt2; and a power supply control unit that brings the first relay into a non-conductive state based on the detection signal output by the hood switch, and brings the second relay into a non-conductive state based on the detection signal output by the luggage switch.