Electrical system for pure electric vehicle

Abstract

The invention discloses an electrical system for a pure electric vehicle. A positive end bus high-voltage direct current contactor, a negative end bus high-voltage direct current contactor and a high-voltage safety switch are arranged between a battery management system of the electrical system and a driving motor controller; and a key switch is used for controlling low-voltage power supply relays of all electrical parts. When the electric vehicle is stopped to be charged, a vehicle-mounted charger independently supplies power to a low-voltage power supply end of the battery management systemand a high-voltage direct current bus; when the key switch is adjusted to an ON position, all of a vehicle controller, the battery management system and the vehicle-mounted charger have no serious faults, and the negative end bus high-voltage direct current contactor, a precharging high-voltage relay and the positive end bus high-voltage direct current contactor are sequentially closed; and when the key switch is adjusted to a Start position, the electrical system can accept an instruction of a driver to drive the vehicle to run. When the key switch is switched on, an electric power-assisted steering device, an electric air conditioner, a braking power-assisted vacuum pump, an electric pump and an electric cooling fan are all controlled to work, and a low-voltage storage battery is charged through buck DC / DC.

Description

technical field [0001] The invention relates to an electrical system of a pure electric vehicle. Background technique [0002] With the depletion of non-renewable petroleum resources and the sharp increase in global car ownership, the problem of vehicle energy and the corresponding problem of vehicle exhaust pollution have attracted widespread attention around the world. With the recent major breakthroughs in battery technology, the advantages of pure electric vehicles with low energy consumption and low emissions have once again emerged. The existing research and development of pure electric vehicles is generally based on traditional vehicles, and the corresponding electrical systems are also developed based on traditional car electrical systems. However, since the electrical system of a traditional vehicle is generally 12V or 24V, while the electrical system of a pure electric vehicle is a high-voltage electrical system and a 12V or 24V low-voltage electrical system, the ...

AI Technical Summary

Problems solved by technology

CN201329816Y describes a high-voltage electrical system. In this electrical system, the relay configuration and the configuration and working mode of the high-voltage contactor are not described, and a separate vehicle controller is lacking

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