Battery electric vehicle high-voltage power-on and power-off control method

Abstract

The invention relates to the field of automobile electronic control, in particular to a battery electric vehicle high-voltage power-on and power-off control method. The battery electric vehicle high-voltage power-on control method mainly includes the steps that 1, a system is self-inspected; 2, a battery high-voltage connection command is sent; 3, whether a main contactor of a battery is closed ornot is detected; 4, a motor power-on command is sent; 5, a motor controller feeds back a high-voltage power-on completion signal; and 6, power-on operation is completed. The battery electric vehiclehigh-voltage power-off control method mainly includes the steps that 1, whether the torque of a motor is 0 or not and whether the rotation speed is lower than 50 rpm or not are detected; 2, an enabling signal of 0 of the motor controller is sent; 3, whether the fed-back enabling state of an IGBT is 0 or not is detected; 4, a motor high-voltage disconnection command is sent; 5, whether a main contactor of the motor controller is disconnected or not is detected; and 6, a battery high-voltage disconnection command is sent. The phenomenon that the battery or the motor controller is damaged due tothe incorrect sequence and insufficient protection measures in the high-voltage power-on and power-off processes can be effectively avoided.

Description

technical field [0001] The invention relates to the field of automotive electronic control, in particular to a method for controlling high-voltage power-on and power-off of pure electric vehicles. Background technique [0002] Pure electric vehicles are powered by drive motors, and power batteries provide energy sources. Pure electric vehicles have two power supply systems, one is a low-voltage system with a voltage of 24V, and the other is a high-voltage system with a voltage of 600V. [0003] The high-voltage management system of pure electric vehicles is related to the safety of the whole vehicle, and is the primary consideration in the pure electric vehicle system. In pure electric vehicles, the battery is easily damaged when the battery is loaded with high voltage, and the battery must be disconnected before the load actively discharges when the power is turned off, otherwise the battery may be damaged. Therefore, the power-on sequence must be strictly regulated. In a...

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Problems solved by technology

[0004] In order to solve the above technical problems, the present invention proposes a pure electric vehicle high-voltage power-on control method and a pure electric vehicle high-voltage power-off control method. Incorrect and insufficient protection measures, resulting in damage to the battery or motor controller

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