Abstract:
A power system for an electric vehicle, an electric vehicle and a method for charging a power battery are provided. The power system includes: a power battery (10); a charge-discharge socket (20); a bidirectional DC-DC module (30); a driving control switch (40); a bidirectional DC-AC module (50); a motor (M); a motor control switch (60); a charge-discharge control module (70); a battery manager (108); and a control module (80) configured to control the driving control switch (40), the motor control switch (60) and the charge-discharge control module (70) so as to control the power system to enter a charge-discharge mode, and to control the power battery (10) to charge and discharge in a pulse mode so as to heat the power battery (10) when the temperature of the power battery (10) is lower than a predetermined temperature.
Abstract:
The present invention discloses an apparatus and method for controlling energy feedback for electric vehicles. The method includes: acquiring an accelerator-pedal travel value, a brake-pedal travel value and a current vehicle speed value; determining whether the brake-pedal travel value is equal to 0%, and calculating a feedback torque based on the current vehicle speed value and the brake-pedal travel value if the brake-pedal travel value is not equal to 0%; or comparing the accelerator-pedal travel value with a given feedback value if the brake-pedal travel value is equal to 0%; and calculating a feedback torque based on the current vehicle speed value if the accelerator-pedal travel value is not greater than the given feedback value; and converting mechanical energy generated by the feedback torque T into electric energy, and transmitting the electric energy to battery of the electric vehicle for storing. According to the present invention, the endurance mileage of electric vehicle may be effectively prolonged and the utilization efficiency of battery is improved.
Abstract:
An on-vehicle power supply system and an electric vehicle are provided. The on-vehicle power supply system includes: a power battery (10); a charge-discharge socket (20) connected with an external load (1001); a three-level bidirectional DC-AC module (30) having a first DC terminal connected with a first terminal of the power battery (10) and a second DC terminal connected with a second terminal of the power battery (10); a charge-discharge control module (50) having a first terminal connected with an AC terminal of the three-level bidirectional DC-AC module (30) and a second terminal connected with the charge-discharge socket (20); and a control module (60) connected with the charge-discharge control module (50) and the three-level bidirectional DC-AC module (30), and configured to control the three-level bidirectional DC-AC module (30) to convert a DC voltage of the power battery (10) into an AC voltage.
Abstract:
A method and an apparatus for controlling output torque of a motor for an electric vehicle in downhill mode. the method comprises following steps: detecting a tilt angle value θ, a current vehicle speed value V and an accelerator-pedal travel value Gain of the vehicle, determining whether the vehicle is in downhill mode or not, and if the result is positive, then calculating a downhill slip torque T1 of the vehicle under the tilt angle value θ, obtaining a maximum output torque T2, calculating an output torque T of the motor based on T1, T2, Gain and a given vehicle speed delimitative value V ref , and controlling the motor to output the calculated output torque T. The present invention ensures the vehicle speed not too high by controlling the output torque of an electric vehicle in downhill mode, even if the brake-pedal travel is zero.
Abstract:
A power system for an electric vehicle, an electric vehicle and a motor controller for an electric vehicle are provided. The power system includes: a power battery (10); a charge-discharge socket (20); a three-level bidirectional DC-AC module (30); a motor control switch (40); a charge-discharge control module (50) having a first terminal connected with an AC terminal of the three-level bidirectional DC-AC module (30) and a second terminal connected with the charge-discharge socket (20); and a control module (60) connected with a third terminal of the charge-discharge control module (50) and a third terminal of the motor control switch (40), and configured to control the charge-discharge control module (50) and the motor control switch (40) according to a current working mode of the power system.
Abstract:
A clutchless transmission apparatus and control method thereof. The transmission apparatus comprises a motor(10) and a transmission(20), said motor(10) is connected to said transmission(20) and supplies power to said transmission(20) via an input shaft of the transmission(20), wherein said apparatus further comprises a control device(30), which is electrically connected to said motor(10) and said transmission(20), wherein said control device(30) is configured to determine whether a gear-position shifting is required based on rotation speed of said transmission(20), if a gear-position shifting is required, regulates torque of said motor(10) to control said transmission(20) to disengage, and then regulates the rotation speed of said motor(10) based on the rotation speed of said transmission(20) to control said transmission(20) to engage for shifting gear-position. The clutchless transmission apparatus provided in the present invention doesn't need a clutch during gear-position shifting, and therefore it is light, simple, easy to maintain and control, and can be used in a wide range of application.
Abstract:
The present invention provides an apparatus and method for controlling an accelerator for electric vehicles. The method comprises steps of: acquiring an actual accelerator pedal depth value and a current vehicle speed; determining a maximum output torque of motor under the current vehicle speed based on the current vehicle speed; and controlling the output torque of motor in such a way that the growth rate of the output torque higher than that of the actual accelerator pedal depth value at the beginning and then closed to that of the actual accelerator pedal depth value during the actual accelerator pedal depth value growing. The invention makes the output torque grown rapidly within the shallow range of accelerator pedal depth, while makes the output torque grown closed to that of the accelerator pedal depth within the relative deep range of accelerator pedal depth. Thus during the initial stage of acceleration, the vehicle may rapidly output a bigger torque, with an excellent dynamic response, to improve the driving comfort.
Abstract:
A charging system for an electric vehicle and a method for controlling charging of an electric vehicle are provided. The charging system comprises: a power battery (10); a charge-discharge socket (20); an external power supply device (1002); a charging connection device (1001); and an energy control device (1003), comprising: a three-level bidirectional DC-AC module (30); a charge-discharge control module (50); and a control module (60) configured to control the charge-discharge control module (50) according to a current working mode of the electric vehicle. The energy control device (1003) and the external power supply device (1002) communicate by transmitting a modulated PWM signal to each other via the charging connection device (1001), and the control module (60) controls the three-level bidirectional DC-AC module (30) and the charge-discharge control module (50) to charge the power battery (10) by the external power supply device (1002).
Abstract:
A vehicle mutual-charging system and a charging connector are provided. The system includes: a first electric vehicle (1002) and a second electric vehicle (1003), each of the first electric vehicle (1002) and the second electric vehicle (1003) including a power battery (10), a battery manager (103), an energy control device (1005) and a charge-discharge socket (20), in which the energy control device (1005) includes: a three-level bidirectional DC-AC module (30), a charge-discharge control module (50),a control module (60); and a charging connector (1004) connected between the first electric vehicle (1002) and the second electric vehicle (1003) and including a first charging gun adaptor connected with the charge-discharge socket (20) of the first electric vehicle and a second charging gun adaptor connected with the charge-discharge socket (20) of the second electric vehicle at both ends thereof respectively.
Abstract:
A charge control system for an electric vehicle and an electric vehicle are provided. The charge control system includes: a charge-discharge socket (20); a three-level bidirectional DC-AC module (30); a charge-discharge control module (50); a filtering module (70); and a control module (60) connected with a third terminal of the charge-discharge control module (50) and configured to control the charge-discharge control module (50) to turn on, to sample an output voltage of an external grid by using a connection midpoint of filtering capacitors in the filtering module (70) as a reference point, and to control the three-level bidirectional DC-AC module (30) according to the output voltage of the external grid so as to control the external grid to charge the power battery (10), when the external grid is in an angle connection mode and a current working mode of the electric vehicle is a charge-discharge mode.