关键词：电动汽车；拓扑结构；优化
摘 要：In the design of CAN network system,as CAN bus topology will affect network performance and cost,it is important to optimize the network topology.This paper analyzes the CAN busload based on CAN protocol,calculates the upper limit of transmission message frames in a single CAN bus.As the amount of information on the bus is increasing,a single CAN bus cannot meet the communication requirements,we put forward dividing the network into multiple homogeneous segments via multi-objective optimization method,developing a genetic algorithm strategy and solving the problem in a MATLAB platform.Finally utilize the method to design a pure electric vehicle network topology.