The present disclosure provides a battery pack control method, a system, and a vehicle which are applied to a vehicle having a vehicle-mounted communication terminal, and relates to the technical field of automobiles. Wherein the vehicle includes a heating module and a cooling module; when the vehicle is in a powered-off state, and when a trigger condition of the predetermined timing task is reached, the vehicle is waken up by the vehicle-mounted communication terminal, and then the temperature of the battery pack is controlled so that the temperature of the battery pack is maintained within the preset range, so as to restart and use the vehicle; thus to solve the problems in the prior art that after the vehicle is in a powered-off state, the temperature of the battery pack cannot be controlled using a heat management system, and the temperature of the battery pack is easily too low or too high due to a lower or a higher ambient temperature.

In a method for operating an electric vehicle and an electric vehicle, including an electric traction drive device for driving vehicle, a control device for controlling the driving, a first energy storage device, for supplying the control device using a first DC voltage, a second energy storage device, for supplying the traction drive device using a second DC voltage, and an energy supply unit for providing an output DC voltage, the first energy storage device is connected to the second energy storage device via a converter device, the first energy storage device is connected to the energy supply unit, the converter device converts the first DC voltage into the second DC voltage, and a power flow from the second energy storage device to the first energy storage device is prevented.

A current measurement apparatus for a three-phase inverter, according to one embodiment of the present invention, comprises: a current detection element connected to a lower end of one of three lower switches constituting the inverter; a current measurement unit measuring currents by using the current detection element and the two lower switches that are not connected to the current detection element; and a current correction unit for correcting, on the basis of the relationship between a first current value measured by means of the current detection element and second and third current values measured by means of the two lower switches, the second and third current values.

A vehicle comprises a battery, a temperature adjustment unit, an inlet, a relay unit, a relay unit, a relay unit, and an ECU. When a power charging station is connected to the inlet, the ECU controls the relay unit to assume a closed position to perform external charging to charge the battery by the power charging station. When the ECU drives the temperature adjustment unit during the external charging and a component on a charging path at an electrical path located between a branch point and a branch point is higher in temperature than a threshold temperature, the ECU controls the relay unit to assume an open position and the relay unit to assume a closed position.

A dual power supply apparatus includes a main power grid that supplies power by a first battery to an autonomous vehicle and a redundant power grid that supplies power to a dual power load based on a second battery, in an emergency driving mode due to a failure in the main power grid.

A low voltage DC-DC converter of an environmentally friendly vehicle includes a first DC-DC converter configured to drop a second voltage lower than a first voltage supplied to a drive motor of the environmentally friendly vehicle to a third voltage, a voltage regulator configured to regulate the third voltage to output a fourth voltage lower than the third voltage, a controller configured to operate in response to the fourth voltage, and a second DC-DC converter configured to convert and output the first voltage into the third voltage in response to an output signal of the controller, in which an output voltage of the second DC-DC converter is supplied to the voltage regulator.

When a voltage measurement value of a first voltage sensor that measures voltage at a direct current end of an inverter exceeds an overvoltage threshold value, and a battery is non-chargeable, a controller of a fuel cell electric vehicle is configured to drive an electric power consumption device until the voltage measurement value falls below the overvoltage threshold value. When the voltage measurement value exceeds the overvoltage threshold value and the battery can be charged, the controller is configured to cause the fuel cell electric vehicle to continue traveling, while estimating the voltage at the direct current end using a second voltage sensor that measures output voltage of a fuel cell stack or a third voltage sensor that measures output voltage of the battery.

A machine includes a plurality of battery string modules that supply electric current to an inverter of the machine. The machine also includes a control system that opens at one contactor coupled to at least one battery string module of the plurality of battery string modules to disconnect the at least one battery string module. The other battery string modules of the plurality of battery string modules, apart from the at least one battery string module, continue supplying electric current to the inverter of the machine while the at least one battery string module is disconnected.

The invention relates to a method for connecting one or more electric battery units to an electrical system. The method comprises: maintaining a system short-circuit which short-circuits the electrical system; while the system short-circuit is maintained, electrically connecting a first electric battery unit, which is locally short-circuited by a local short-circuit, to the electrical system so as to include the first electric battery unit in the electrical system; and while the system short-circuit is maintained, removing the local short-circuit of the first electric battery unit, whereupon the first electric battery unit is short-circuited by the system short-circuit of the electrical system. The method may be performed as a part of an electrical system installation procedure in for example a hybrid or electric vehicle and allows the electric battery units to be connected to the electrical system in a safe way.

A power control system includes a power inverter comprising a first side, a second side, and a plurality of power switches. The second side is configured to connect to an electric machine. A solid state fuse includes a power switch including a first terminal in communication with the first terminal of a rechargeable energy storage system (RESS) of the electric vehicle and a second terminal in communication with the first side of the power inverter. A DC-DC converter is configured to convert a first voltage output by the RESS of the electric vehicle to a second voltage. One or more sensors configured to sense one or more operating parameters of the RESS. A fuse controller is configured to receive power from the DC-DC converter, to communicate with the one or more sensors and to cause the power switch to selectively change state in response to changes in the one or more operating parameters.