Abstract: Disclosed is a wearable device, comprising a casing assembly, a circuit board, an interface assembly, and a wire assembly. The casing assembly is provided with an accommodation slot and an accommodation cavity, the circuit board is disposed within the accommodation cavity, and the interface assembly is inserted into the accommodation slot, and electrically connected with the circuit board through the wire assembly. By setting the interface assembly separately from the circuit board and utilizing the wire assembly to establish an electrical connection between the interface assembly and the circuit board, a space occupied by the interface assembly on the circuit board can be reduced, which is conducive to reducing the size of the circuit board, adjusting a mounting position and mounting attitude of the interface assembly, and the overall miniaturized design of the wearable device may be realized.

Abstract: A method for controlling an electric drive system, includes: determining that the vehicle is in a traveling condition; obtaining a rotation speed value, a shaft end torque value, a present direct axis current value, and a present quadrature axis current value of the motor when receiving a vehicle heat-up demand signal; determining a target torque curve according to the shaft end torque value, and determining a target traveling heating calibration curve according to the vehicle heat-up demand signal and the rotation speed value; determining an intersection of the target torque curve and the target traveling heating calibration curve as a target traveling condition point; determining a target quadrature axis current value and a target direct axis current value according to the target traveling condition point; and controlling, according to the target direct axis current value and the target quadrature axis current value, the motor to operate.

Abstract: In a power battery heating method for a vehicle, when a current temperature value of a power battery is lower than a preset temperature value, and a heating condition of the power battery meets a preset condition, a three-phase inverter is controlled to cause a three-phase alternating current motor to generate heat according to heating energy, to heat a coolant flowing through the power battery, a preset quadrature-axis current that causes a torque value outputted by the motor to be an appropriate value is obtained, and a corresponding preset direct-axis current is obtained according to heating power of the power battery, so as to control, according to the preset direct-axis current and the preset quadrature-axis current, the three-phase inverter to adjust a phase current of the three-phase alternating current motor in the heating process, where a direction of the preset direct-axis current changes periodically in the heating process.

Abstract: The present disclosure provides a vehicle and a power battery heating apparatus and method thereof.