High-voltage safety protection method and circuit of electric vehicle as well as corresponding electric vehicle

Abstract

The invention discloses a high-voltage safety protection method and circuit of an electric vehicle as well as the corresponding electric vehicle. The high-voltage safety protection method of the electric vehicle comprises steps as follows: arranging a collision sensor and a manual emergency switch in a control circuit of the electric vehicle and executing following steps to provide high-voltage safety protection: S1, judging whether the collision sensor acts or not, if the collision sensor does not act, performing S2, and otherwise, performing S3; S2, judging whether the manual emergency switch acts or not, if the manual emergency switch acts, performing S4, and otherwise, performing S1; S3, opening a high-voltage loop and disabling a motor MCU (micro controller unit); S4, opening the high-voltage loop and disabling the motor MCU. With the adoption of the method and the circuit, the high-voltage loop can be opened quickly and automatically when the pure electric vehicle has an emergency, and harm caused by high voltage to human bodies and property is avoided.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a high-voltage safety protection method and circuit for electric vehicles. Background technique [0002] Although the development of automobiles promotes economic development, the emission of automobile exhaust also has a negative impact on the urban environment. In order to improve the air quality of the city and reduce the emission of pollutants from motor vehicles, large and medium-sized cities in China are promoting clean energy actions , among which pure electric vehicles are the focus of the action. Pure electric vehicles use power batteries and motors as power devices, and their working voltage is as high as several hundred volts. The voltage level has far exceeded the safe voltage level of the human body and poses a threat to human safety. Therefore, the safety of high-voltage electricity must be considered first. , and the high-voltage safety protection of the vehic...

AI Technical Summary

Problems solved by technology

[0004] At present, the electric vehicles produced by many domestic companies only have safety protection measures for traditional components such as airbags, bumpers, and seat belts. None of these measures can play a role in high-voltage safety protection. , resulting in a short circuit or open circuit of the high-voltage circuit. If the power battery circuit cannot be disconnected in a short period of...

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