I study the design problem of electric vehicle communication device based on CAN bus,the communication system of the electric vehicle is controlled by modern sensor technology,computer communication technology for signal acquisition,the electric car interior all some facilities,body control provides effective and safe,so that electric cars in use can make the control more convenient and intuitive understanding of the operation of electric vehicle and can help the driver to simple.This design is a communication based on CAN bus,display control through the CAN bus for all equipment in the body.The hardware of the system mainly consists of singlechip,CAN controller,a display part,system modular design in hardware and software,the concrete realization of the single-chip microcomputer as the control core,the digital quantity input,analog output module,and CAN interface circuit module and liquid crystal display module.The application of CAN bus,simplifies the electric circuit structure is the internal communication and control more convenient.目测不错、能不能麻烦帮我把课题题目也翻译出来啊、谢谢拉、对了、还有关键字Circuit design of CAN bus communication for electric vehicle（题目）关键词：CAN总线；单片机；CAN控制器；液晶显示器Keywords: CAN bus; MCU; CAN controller; LCD