A power supply control device for a vehicle controls power supply to a first load. A first controller is formed on a first substrate and controls power supply to the first load. A second controller is formed on a second substrate that is different from the first substrate, and instructs the first controller to perform an operation regarding power supply. The first controller and the second controller include a first switch and a circuit switch, respectively. The first switch and the circuit switch are provided on a current path of a current flowing via the first load. The second controller provides an instruction to switch the first switch on or off.

A vehicle power supply device for supplying electric power to a plurality of auxiliary loads mounted on a vehicle, comprising: a power supply source; an auxiliary battery including a lithium ion battery chargeable by the power supply source; a DDC provided between the power supply source and the plurality of auxiliary loads and controlling the power supply from the power supply source to the plurality of auxiliary loads; a switch provided between DDC and the plurality of auxiliary loads and the auxiliary battery, and switching an electrically connected status between the plurality of auxiliary loads and the auxiliary battery; and a control unit for controlling DDC and the switch, wherein the control unit controls the output voltage of DDC to be higher in the second voltage when the switch is shut off than the first voltage when the switch is turned on.

The present disclosure provides a management system (110), a vehicle battery (1100), a power supply device, a vehicle (11000), and an over-charge protection method. The management system (110) includes a first energy storage component (1112), a battery interface (1114), a load interface (1116), and an energy storage component management circuit (1118). The first energy storage component (1112) is capable of supplying power to an electrical device (1300) and to a load. The energy storage component management circuit (1118) is configured to: disconnect the first energy storage component (1112) from the load interface (1116) when an electric charge of the first energy storage component (1112) is less than a first predetermined electric charge, and disconnect the first energy storage component (1112) from the battery interface (1114) when the electric charge of the first energy storage component (1112) is less than a second predetermined electric charge.

A low-voltage system of a transport refrigeration unit (TRU) includes a low-voltage direct current (LVDC) source; and a distribution bus coupled to the LVDC, the distribution bus is coupled to a compressor, at least one condenser, and at least one evaporator.

An energy storage apparatus includes a cell, a relay which cuts off a current of the cell, a bypass circuit connected in parallel with the relay, and a management device. The bypass circuit includes two back-to-back connected FETs. When an abnormality of the cell is detected by the management device, the management device opens the relay, closes one FET of the two FETs, and opens the other FET, and permits a discharge or a charge of the cell through a path passing through a parasitic diode of the FET. When the discharge or the charge is being performed through the path passing through the parasitic diode, if a current I and an energization time T of the FET(s) reach a predetermined condition or the temperature of the FET(s) reaches a predetermined condition, the management device 150 closes the relay 53 and the other FET(s) that is open.

This disclosure is directed to circuits and techniques for configuring a driver circuit for a power switch when entering a fail-safe state. The driver circuit includes a volatile memory connected to a plurality of independent power supplies, the volatile memory configured to store a fail-safe configuration for the driver circuit. The driver circuit includes driver logic connected to the volatile memory that is configured to determine to enter a fail-safe state and, in response to determining to enter the fail-safe state, configure the driver circuit or a power switch according to the fail-safe configuration stored in the volatile memory.

One embodiment of the present disclosure comprises a PWM setting unit, a random number generation unit, a variation amount generation unit, an addition unit, a counter unit, and a comparison unit in order to generate a PWM wave for each given cycle and increase or decrease an on period for each PWM wave such that the duty ratio of the PWM wave is held when seen in a control cycle which is two or more given cycles.

A device supplies energy to a sensor arrangement in a rail vehicle. The device has a housing in which there is arranged a coil which can be inductively coupled to a motor cable carrying an alternating current. The housing is embodied to enclose part of a length of the motor cable, and the coil is wound around an annular coil core which concentrically or substantially concentrically surrounds the motor cable. The housing has multiple parts including at least one first and one second housing part. The annular coil core is implemented in multiple parts and a first coil core part is arranged in the first housing part and a second coil core part is arranged in the second housing part. The housing is further embodied to mechanically secure the motor cable to a component of the rail vehicle and/or to mechanically connect the motor cable to a further motor cable.

When a DC power source fails, the following controls are performed. The normal control is resumed when an inverter input voltage recovers before a standby period elapses after a power failure time. A power source relay is turned off when the standby period elapses without recovery of the voltage. The power source relay is turned on again when a power source relay off period has elapsed from a turn-off time. The normal control is resumed when the inverter input voltage recovers at the turn-on time. The normal control is resumed when the inverter input voltage recovers before the power source relay on period elapses from the turn-on time. The power source relay is turned off, and driving of the actuator is stopped, when the power source relay on period passes without recovery of the voltage.

Disclosed is a system for supplying and receiving electrical power from multiple electrical power buses. The system includes an electrical charge storage medium, a first switch connecting the storage medium to a first power bus, and a second switch connecting the storage medium to a second power bus. These switches are electronically controlled by a controller to manage power flow between the storage medium and the power buses.