Electric vehicle power assembly controller

Abstract

The invention relates to an electric vehicle power assembly controller. The electric vehicle power assembly controller comprises a battery management system, a motor control unit, a transmission control unit, and a central controller. The central controller acquires operating parameters of a battery pack, a traction motor and a transmission, judges whether the battery pack, the traction motor and the transmission work normally or not, and sends control signals to the battery management system, the motor control unit, and the transmission control unit to control working states of the battery management system, the motor control unit, and the transmission control unit. According to the electric vehicle power assembly controller, the battery pack, the traction motor and the transmission are monitored, so that cost of the controller is reduced, the wiring harnesses are simplified, the weight is reduced, the space requirement is lowered, a system is simplified, the system reliability is improved; the purpose that control over a power assembly is centralized to one control center and one power assembly central controller is used for fully monitoring the power pack, the traction motor and the transmission in the power assembly is achieved; and an electric vehicle is lower in weight, low in cost, and high in efficiency and reliability.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle control, in particular to an electric vehicle power assembly controller. Background technique [0002] With the increasing popularity of electric vehicles, especially in order to alleviate air pollution, the government is vigorously promoting the promotion and application of electric vehicles. In the future, electric vehicles will occupy a large proportion of motor vehicles. In the existing technology of electric vehicles In the electric vehicle management system, how to efficiently manage the various functional components of the electric vehicle is a key issue in the development of electric vehicles. [0003] In the field of electric vehicle technology, the battery management system (BMS) is responsible for the management of the battery pack, the motor control unit (MCU) is responsible for the management of the traction motor, and the transmission control unit (TCU) is responsible for th...

AI Technical Summary

Problems solved by technology

[0008] In actual operation, the VCU needs to continuously transmit information and control each other with the BMS, MCU, and TCU through the CAN bus. The transmission of these information is limited by the communication line and time lag. Once the CAN bus fails, data transmission may be If the interruption occurs, the whole system may be paralyzed. In the existing technology, in order to prevent this from happening, four controllers are installed in the powertrain of each electric vehicle. This method not only increases the cost, but also increases the wiring harness Quantity, increase the weight of the controller, increase the space requirements of the equipment, increase the complexity of the system, and reduce the reliability of the system

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