Power-on control method and device of electric automobile and electric automobile

Abstract

The invention provides a power-on control method and device for an electric automobile and the electric automobile. The method comprises the steps: under the conditions that the electric automobile has a high-voltage power-on requirement and a high-voltage bus of a power supply high-voltage loop is not short-circuited, sending a work requirement inquiry signal to a high-voltage controller; receiving a working demand confirmation signal of the high-voltage controller, controlling the first relay to be closed, and pre-charging a bus capacitor of the high-voltage controller; and receiving a pre-charging success signal of the bus capacitor of the high-voltage controller, and controlling the second relay to be closed. According to the power-on control method of the electric vehicle, the relay design is added to each high-voltage power distribution branch, whether the high-voltage plug-in is actually disconnected or not can be actually judged through hardware improvement and software strategy optimization, the problem that power distribution insurance is damaged due to artificial intentional damage can be effectively solved, the failure rate of each controller is reduced, the reliability is improved, and the subsequent maintenance and claim cost is reduced.

Description

technical field [0001] The invention relates to the field of high-voltage power distribution insurance protection for electric vehicles, in particular to a power-on control method and device for electric vehicles and the electric vehicle. Background technique [0002] In pure electric vehicles, it is often the case that someone artificially damages the distribution insurance of the high-voltage controller, specifically as follows: [0003] If the high-voltage controller does not have the interlock detection function of high-voltage connectors, the whole vehicle can be directly powered on with high voltage, and each high-voltage connector is charged with normal high-voltage electricity. If the positive and negative of the high-voltage busbars of each high-voltage plug-in are artificially shorted externally, that is, HV+ and HV-, various high-voltage power distribution insurances will be caused, such as: positive temperature coefficient thermistor heater PCT, electronically co...

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a power-on control method and device for an electric vehicle, and the electric vehicle, to solve the problems in the prior art that the high-voltage controller is artificially damaged, the power distribution insurance of the high-voltage controller is damaged, and the high-voltage controller fails

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