Abstract: A power-off device, a battery, and an electric device. The power-off device includes: an insulating base, where the insulating base is provided with at least two conductive pieces; and a circuit breaker piece, where the circuit breaker piece is detachably provided on the insulating base; the circuit breaker piece is electrically connected in series to the at least two conductive pieces, so that an assembly formed by the circuit breaker piece and the at least two conductive pieces can transmit electrical energy; and the circuit breaker piece is configured to be capable of cutting off the electrical connection when a preset condition is satisfied.

Abstract: A material transferring method includes: controlling a first robot transferring materials to move to a first entrance of the M entrances; and controlling the first robot to place a first quantity of materials at the first entrance, the first quantity being less than or equal to a second quantity. The first entrance is one of the M entrances that is in an idle state. The second quantity is a total quantity of materials to be placed on the conveyor line by the first robot.

Abstract: An electromagnetic transient modeling method and system for a high-efficiency synchronous machine, and, a device. The method comprises: predicting, of a synchronous machine, a first rotor angular velocity, a first rotor angle, and a first current q component of and a first current d component of an armature current, establishing a first Norton circuit for simulating the synchronous machine, and solving at the same time a second Norton circuit after equivalent transformation and a network conductance matrix so as to obtain a three-phase voltage of a synchronous machine port; according to the three-phase voltage, obtaining a second current q component, a second current d component, a second rotor angular velocity and a second rotor angle; and by means of error-controlled iterative solving, determining an electromagnetic transient simulation calculation result of the synchronous machine.

Abstract: A saturation effect-based synchronous machine electromagnetic transient modeling method, system and device. In the method, by predicting a first rotor angular velocity, a first rotor angle, a first current q component, a first current d component, a first flux linkage turning point d component, a first flux linkage turning point q component and flux linkage turning data of a synchronous machine, analysis processing is performed to obtain a corresponding second current q component, second current d component, second rotor angular velocity, second rotor angle, stator flux linkage d component and stator flux linkage q component.

Abstract: A power supply system includes a charger supporting an alternating current/direct current bidirectional conversion, a battery, an electrical converter and an electrical apparatus. The charger is electrically connected with both the battery and the electrical apparatus, and the battery is electrically connected with the electrical apparatus through the electrical converter.

Abstract: An electric motor, a power system, a control method, and an electric vehicle. The electric motor comprises a first N-phase winding set and a second N-phase winding set, wherein the first N-phase winding set and the second N-phase winding set are both used for being connected to a traction battery by means of a conversion module. When the traction battery starts to be heated, the first N-phase winding set and the second N-phase winding set are powered on. The direction of a magnetic field generated by the first winding set and the direction of a magnetic field generated by the second winding set have a phase difference, such that the magnetic fields counteract each other; and a magnetic field intensity in a stator winding of each phase is reduced, and an air-gap magnetic flux is also reduced, thereby alleviating the problems of electric motor heating and electric motor NVH.

Abstract: A power device includes a direct current terminal and a first alternating current terminal; the direct current terminal being connected to a first battery, and the first alternating current terminal being connected to a first power interface. The power device is configured to convert a battery voltage of the first battery into a first alternating voltage upon receiving a first signal, and supply power to the first power interface through a first path between the direct current terminal and the first alternating current terminal.

Abstract: A charging apparatus includes a first port electrically connected to a charging port of an electric device that is configured to be electrically connected to an external charging device, a second port electrically connected to a power battery of the electric device, and a third port electrically connected to a first load. The charging apparatus is configured to convert electrical energy input from the charging port or the power battery into a first alternating current, and transmit the first alternating current to the first load.

Abstract: A battery charging control method applicable to a vehicle electrical system that includes a current control unit including a semiconductor device. Two ends of the current control unit are connected to a battery and a charging power supply, respectively. The method includes controlling, when a temperature of the battery is below a preset temperature, the current control unit to be in a first state in which the semiconductor device is reversely connected in a circuit, sending a first charging request including a first charging current required to heat the battery to the preset temperature, controlling, when the temperature of the battery reaches the preset temperature, the current control unit to be in a second state in which the semiconductor device is disconnected from the circuit or forwardly connected in the circuit, and sending a second charging request including a second charging current at which the battery is charged.

Abstract: A power supply system includes a charger supporting an alternating current/direct current bidirectional conversion, a battery, an electrical converter and an electrical apparatus. The charger is electrically connected with both the battery and the electrical apparatus, and the battery is electrically connected with the electrical apparatus through the electrical converter.

Abstract: The embodiments of this application relate to the technical field of battery, and in particular, to a thermal management system, a method and an equipment. In this thermal management system, a compressor and a condenser form a cooling loop with a thermal exchange pipeline of the battery, and a compressor and an evaporator form a heating loop with a thermal exchange pipeline, so that this thermal management system can provide both cooling and heating for battery, in comparison with the direct cooling system and heating film, this thermal management system features simple structure and high reliability. In addition, the locations of the condenser and the evaporator can be reasonably arranged as required to achieve the secondary utilization of hot air and cold air.

Abstract: This application provides a torque compensation method for a vehicle, a torque compensation apparatus of a vehicle, and an associated computer-readable storage medium. The torque compensation method includes: when a vehicle control module determines that the vehicle is in a sliding state during a brake idle stroke, obtaining, by the vehicle control module, a pressure of a brake master cylinder of the vehicle, and controlling a motor of the vehicle based on the pressure of the brake master cylinder to output a compensation torque. In this application, a range of the brake idle stroke of the vehicle can be precisely determined, so as to control the motor of the vehicle to output the compensation torque in a timely manner, thereby effectively suppressing sliding during the brake idle stroke of the vehicle and ensuring safe driving.

Abstract: An aspect of the present disclosure relates to a polymer including a structural unit represented by the following Formula (I) and a structural unit having a carboxy group. In Formula (I), R1 represents a hydrogen atom or a methyl group; M represents an alkylene group or an alkylene oxide chain; and R2 represents an alkyl group or an aryl group.

Abstract: A battery management method, a battery management device, and a battery system are provided in the embodiments of the present disclosure. The battery management method is applied to the battery management device to realize management of the battery device. The battery management device comprises a connection state transition device, contacts of the connection state transition device are connected to two battery packs of the battery device, respectively. The method includes: obtaining an operating environment voltage of the battery device; and controlling the connection state transition device to transition from a first connection state to a second connection state according to the operating environment voltage. It is desirable to solve the technical problem of incompatibility of the battery device with different voltage platforms in the embodiments of the present disclosure.

Abstract: The application provides a battery charging circuit. The battery charging circuit includes a bidirectional vehicle-mounted charging module; a first loop switch module, configured to, once turned on, connect a direct current charging interface of a charging pile to the bidirectional vehicle-mounted charging module's first end, and the bidirectional vehicle-mounted charging module's second end to a battery pack, when the charging pile is charging an electric vehicle; a second loop switch module, configured to, once turned on, connect the direct current charging interface to the battery pack, when the charging pile is charging the electric vehicle; the bidirectional vehicle-mounted charging module, configured to boost a direct current voltage output by the charging pile to be higher than a preset voltage; and a control module, configured to control the first loop switch module or the second loop switch module to be turned on, according to the direct current voltage.

Abstract: The present application provides a switch control device and method, a motor controller, and a battery pack heating control system. The switch control device includes: a processing module configured to select, when it is determined that a switch control cycle switches from a previous cycle to a current cycle, a target upper bridge arm switch module for the current cycle from upper bridge arm switch modules other than a target upper bridge arm switch module for the previous cycle and/or select a target lower bridge arm switch module for the current cycle from lower bridge arm switch modules other than a target lower bridge arm switch module for the previous cycle; wherein the processing module is further configured to: during each switch control cycle, control the target upper bridge arm switch module and the target lower bridge arm switch module to be turned on and off.

Abstract: The present application provides a method and a device for charging and discharging a battery system, the battery system and an electric vehicle. The battery system includes a low-voltage battery and a high-voltage battery, the high-voltage battery and the low-voltage battery are both configured to be connected with a load. The method for charging and discharging the battery system includes steps of obtaining a first power of the load when the load is in operation; obtaining a first SOC value of the low-voltage battery and a second SOC value of the high-voltage battery; and controlling charge-and-discharge processes of the high-voltage battery and the low-voltage battery according to the first power, the first SOC value and the second SOC value.

Abstract: The present disclosure provides a near-infrared (NIR) photothermal catalyst and a preparation method and use thereof. The method includes: mixing a graphene oxide (GO) dispersion and a dehydrating agent to obtain a GO solution; mixing the GO solution and branched polyethyleneimine (PEI) and then drying to obtain a GO-PEI carrier; and mixing the GO-PEI carrier with water and adjusting a pH value to be within a range of 2 to 4.5, adding dropwise a monosubstituted Keggin-type polyoxometalate (POM) aqueous solution, and conducting an ion replacement reaction to obtain the NIR photothermal catalyst, wherein a solute of the monosubstituted Keggin-type POM aqueous solution is K6SiW11Co(H2O)O39 or H4SiW11Ce(H2O)4O39.

Abstract: A material transferring method includes: controlling a first robot transferring materials to move to a first entrance of the M entrances; and controlling the first robot to place a first quantity of materials at the first entrance, the first quantity being less than or equal to a second quantity. The first entrance is one of the M entrances that is in an idle state. The second quantity is a total quantity of materials to be placed on the conveyor line by the first robot.

Abstract: A battery pack heating system includes: a main positive switch, a main negative switch, an inverter, an external port, a motor, a control module for auxiliary charging branch, a vehicle control unit, a motor control unit, and a battery management module. The battery management module is configured to send, when an acquired state parameter of the battery pack meets a preset low-temperature-low-power condition, a low-temperature-low-power heating request instruction to the vehicle control unit and the control module respectively. The control module is configured to send a first control signal to control the auxiliary charging branch to be connected. The vehicle control unit is configured to send a second control signal to enable the motor control unit to control on-off of the switch modules in the inverter, and a third control signal to enable the battery management module to control on-off of the main positive switch.