A device includes a first supply unit, which is connectable via a first switch element to a first consumer, a second supply unit, which is connectable via a second switch element and via one or more electric delimitation elements to the first consumer, and a third switch element, which is configured to bridge the one or more electric delimitation elements. A control unit is configured to cause the first switch element to close, and the second and third switch elements to open, in normal operation. The control unit is further configured to detect that a first supply voltage at the first supply unit has reached or fallen below a voltage threshold value, and in response causes first the second switch element to close, then the first switch element to open, and then the third switch element to close, such that the first consumer is coupled to the second supply unit.

Provided is a vehicle power source control device and system that supplies power from an auxiliary power source to an in-vehicle load while suppressing the consumption of power when a failure occurs in the main power source when a vehicle has not been started. When a drive signal generation unit generates an off-signal and a main power source has failed, a power source drive circuit in an in-vehicle power source control device controls a power source circuit such that power is supplied from an auxiliary power source to a control unit. If the drive signal generation unit is generating an off-signal and the main power source is in a failed state, the control unit uses power supplied from the auxiliary power source to control the relay to switch to the first stopped state, and controls the converter to switch to the second permissive state.

An electric power supply comprises first and second input circuits for receiving first and second input DC voltages and a control circuit coupled to the first and second input circuits. The control circuit is configured to sense the first input DC voltage and the second input DC voltage and to enable the first input circuit and disable the second input circuit in response to the first input circuit having the highest input DC voltage to substantially prevent current from back feeding to the first input circuit from the second input circuit. The control circuit is also configured to enable the second input circuit and disable the first input circuit in response to the second input circuit having the highest input DC voltage to substantially prevent current from back feeding to the second input circuit from the first input circuit.

This application provide a power supply device and a control method. In one example, a power supply device includes a first AC/DC unit and a second AC/DC unit. An input terminal of the first AC/DC unit and an input terminal of the second AC/DC unit are connected to an alternating current input bus. An output terminal of the first AC/DC unit is connected to a first direct current output bus. The first AC/DC unit is output stable. An output terminal of the second AC/DC unit is connected to a second direct current output bus. Power is output to a plurality of direct current output buses respectively through a plurality of AC/DC units to supply power to different loads.

Embodiments of this application propose a low-voltage redundant power supply system, including: a high-voltage battery pack, configured to provide a first voltage and including a number of power supply units sequentially connected in series, each of the power supply units being at least one battery in the high-voltage battery pack or an equivalent power supply formed by connecting a number of batteries in series/parallel; and a relay array, with relays in the relay array connected to the power supply units in the high-voltage battery pack based on a specified connection relationship, where in at least one on/off state combination of the relay array, at least one power supply unit in the high-voltage battery pack is reused in a time-division manner to provide a second voltage to supply power to a low-voltage load; and the first voltage is higher than the second voltage.

Systems and methods for power and data distribution on an aircraft. One embodiment provides an aircraft comprising a plurality of nodes, a power system controller, and an aircraft controller. Each node is connected to a plurality of LRUs, and each node includes a node controller. The power system controller is configured to control power distribution to each node. The aircraft controller is configured to transmit data to each node and to receive data from each node. The node controller includes an electronic processor and a memory. The node controller is configured to control power to the plurality of LRUs, receive first data from at least one LRU of the plurality of LRUs, and provide the first data to the aircraft controller. The node controller is further configured to receive second data from the aircraft controller and provide the second data to at least one LRU of the plurality of LRUs.

An electrical power distribution system includes a first power bus operating in a first voltage range and a second power bus operating in the first voltage range. A first eFuse circuit selectively couples a power source to the first power bus. A second eFuse circuit selectively couples the power source to the second power bus. A first accumulator is coupled to a first node between the first eFuse circuit and the first power bus. A second accumulator is electrically coupled to a second node between the second eFuse circuit and the second power bus. The first eFuse circuit opens in response to a first electrical fault at the first power bus, and the second power bus is powered with the power source or the first accumulator. The second eFuse circuit opens in response to a second electrical fault at the second power bus, and the first power bus is powered with the power source or the first accumulator.

A design for the electrical infrastructure of a data center enables two different configurations to be utilized, including a distributed, redundant configuration that provides higher reliability and a non-redundant configuration that provides higher capacity. In the distributed, redundant configuration, each server in the data center draws power from at least two different power supply systems. This enables load shifting when a power supply system becomes unavailable, which can have the effect of increasing server reliability. In the non-redundant configuration, each server in the data center draws power from only one power supply system. Load shifting is not utilized in the non-redundant configuration, which eliminates the need to maintain reserve capacity and thereby increases capacity. Advantageously, it is possible to switch between these two configurations without making any internal changes to the data center other than modifying connections between sets of server racks and power buses.

A configuration that can increase the reliability of a backup operation is realized in a simpler manner. An in-vehicle backup power source control apparatus includes a first control unit that causes a charge/discharge unit (first discharge unit) to perform a first discharge operation when power supply that is based on a power source unit enters a failure state, and a second control unit that causes a second discharge unit to perform a second discharge operation when power supply that is based on the power source unit enters a failure state and at least the first discharge operation performed by the charge/discharge unit is in an abnormal state.

A power converter as provided includes: a control circuit configured to receive a first electric energy supplied to the control circuit from an energy storage device, receive a second electric energy supplied to the control circuit from a power grid equipment, and be powered on with a third electric energy which is the first electric energy or the second electric energy, and output a control signal; and a power conversion circuit configured to receive the control signal and perform power conversion between the energy storage device and the power grid equipment according to the control signal.