Pure-electric-coach safety start sequential logic control method

Abstract

The invention provides a pure-electric-coach safety start sequential logic control method. The method includes when detecting that a key of a pure electric coach is switched from the LOCK gear to the ACC (acceleration) gear, performing a power-on self-test on lower-voltage equipment of the pure electric coach; when detecting that the key is switched from the ACC gear to the ON gear, detecting whether a battery management system and a motor controller of the pure electric coach are in a normal state or not; if yes, starting high-voltage output; judging whether the high-voltage output is normal or not; if yes, allowing high-voltage power to be utilized by a high-voltage power consumption system of the pure electric coach; when detecting that the key is switched from the ON gear to the START gear, detecting whether the pure electric coach meets preset conditions or not; if yes, allowing the motor controller to control a main contactor to be closed to control the pure electric coach to enter an operational standby state; when judging that the gears are switched currently and a brake pedal signal is effective, processing gear switching operation. By the method, the high-voltage output can be safely started during starting of the pure electric coach, and safety of the electric coach, electric equipment and passengers is guaranteed.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a method for controlling logic of a pure electric bus safe starting sequence. Background technique [0002] In the current global shortage of petroleum energy and severe environmental pollution, pure electric vehicles have become the world's leading automobile industry due to their advantages such as energy saving, low environmental pollution, low noise, simple structure, easy control, and easy maintenance. Key development direction. In particular, pure electric buses among pure electric vehicles are an important development direction of public transportation in the future. [0003] However, pure electric vehicles also have the following safety hazards: [0004] Since the pure electric vehicle uses a high-voltage drive motor, a high-voltage circuit is installed in the car to ensure the power performance of the drive motor, and the power supply voltage far exceeds the standard ...

AI Technical Summary

Problems solved by technology

[0003] However, pure electric vehicles also have the following safety hazards:

[0004] Since the pure electric vehicle uses a high-voltage drive motor, a high-voltage circuit is installed in the car to ensure the power performance of the drive motor, and the power supply voltage far exceeds the standard safety voltage, and the charging and discharging characteristics of the power battery are likely to cause problems such as combustion, explosion, and leakage. Therefore, the safety protection performance of pure electric vehicles is low, and the starting safety of pure electric vehicles cannot be protected, and a clear unified starting sequence control logic has not been formed.

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