Starting control system of pure electric vehicle

Abstract

The invention provides a starting control system of a pure electric vehicle. The starting control system comprises a vehicle control unit, a battery management system (BMS), a motor controller, a main contactor and a vehicle high-pressure system. The method for using the starting control system comprises the following steps that insulation fault condition transmitted by the BMS is obtained, if a motor controller fails, and a command of starting an air conditioner is not received, so that sending an electrifying command is not needed; a main contactor is put through to electrify the vehicle high-pressure system; the situation whether a starting switch is effective or not is judged; if not, the starting of the vehicle is withdrawn, and if yes, the validity period number (cnt) of a starting switch is enabled to be increased by degrees; when the cnt is not greater than an N, the starting of the vehicle is withdrawn; if an accelerator signal is null, the situation that Hard_out = 1 is guaranteed; if high level is not generated, the starting of the vehicle is withdrawn; and if the neutral gear is not generated, the starting mark position Drive_En of the motor controller is set as 1 in a binary system, a zero-torque condition is requested to the motor controller, and an inverter driving motor is controlled to complete the start of the vehicle. According to the starting control method disclosed by the invention, the starting control method of the pure electric vehicle is realized through the vehicle control unit according to the level condition and a CAN corresponding enabling mark position condition.

Description

technical field [0001] The invention relates to the technical field of pure electric vehicles, in particular to a starting control system for pure electric vehicles. Background technique [0002] Regardless of whether it is an electric vehicle or a traditional fuel vehicle, the driver's initial operation is the same, that is, to turn the car key to the starting gear or press the start button to ignite the ignition. In an electric car, even when the button is pressed, it is only in a ready state (some models will display the word "READY" on the instrument panel), and the motor is still at a standstill. At this point, the electric car is no different from the state before the button was pressed, and the electric motor has not yet started to work, but is just ready to drive. At this time, the driver can shift the gear lever from the N position (parking gear) to the D position (forward gear) like driving a fuel car, and then step on the accelerator pedal, and the electric car w...

AI Technical Summary

Problems solved by technology

When the vehicle is ready to start, a single level transmission or CAN communication is used between the vehicle controller and the motor controller. Electric vehicles are subject to strong electromagnetic interference, and the level and CAN communication are extremely susceptible to interference from the external environment, which may easily cause false starts and cause safety hazards. ACCIDENT

Images