Low-voltage battery power-on control method and device of electric vehicle and electric vehicle

Abstract

The invention provides a low-voltage battery power-on control method and device of an electric vehicle and the electric vehicle, and relates to the field of power-on processing of the low-voltage battery of the electric vehicle. The low-voltage battery power-on control method of the electric vehicle includes: obtaining the performance degradation judgment result of the previous power-on cycle of the current power-on cycle of the low-voltage battery and the wake-up times N of the controller in the power-on process of the low-voltage battery i ; According to the performance degradation judgment result and the wake-up times N i , determining the low-voltage power-on mode of the current power-on cycle of the low-voltage battery; acquiring the performance degradation judgment result of the low-voltage battery when the low-voltage battery is powered on according to the low-voltage power-on mode in the current power-on cycle and the wake-up times of the controller . In the embodiment of the present invention, the stability and smoothness of the output voltage during the power-on process of the low-voltage battery are ensured through the detection of the performance degradation of the battery and the wake-up of the controller in stages, thereby ensuring a better driving experience.

Description

technical field [0001] The invention relates to the field of power-on processing of a low-voltage battery of an electric vehicle, in particular to a method and device for power-on control of a low-voltage battery of an electric vehicle and the electric vehicle. Background technique [0002] In the face of increasingly severe energy and environmental problems, energy-saving and new energy vehicles are becoming research hotspots in various countries. The governments of major countries in the world are vigorously developing energy-saving and new energy vehicles. The global environment is of great significance. In my country, energy-saving and new energy vehicles have been highly valued by the government and the industry. They are not only of great significance to my country's energy security and environmental protection, but also the future development trend of my country's automobile field. [0003] Different from traditional fuel vehicles, the energy of electric vehicles is ...

AI Technical Summary

Problems solved by technology

[0007] Embodiments of the present invention provide a low-voltage battery power-on control method and device for an electric vehicle and an electric vehicle, which are used to solve the performance degradation of the battery in the prior art due to the increase in service time. It can ensure the stability of the output voltage during the low-voltage power-on process of the vehicle, and the problem of poor driving experience caused by the reliability of the vehicle power-on process through fault agreement

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