Controllor Area Network Protocol for

Powertrain System of Electric Vehicles

LI Fang¹  ZHANG Junzhi²  WANG Lifang¹  LIAO Chenglin¹

(1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100080;
2. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084)

Abstract: The basic principle of designing controller area network(CAN)-bus protocol is given. Considering the control characteristics of electric vehicles, the recommended network topologies of power train system are designed separately for three kinds of electric vehicles including hybrid electric vehicle, pure electric vehicle and fuel cell vehicle. Due to the disagreement on designing the application layer protocol of electric vehicles at present, a general protocol is proposed based on J1939, which can be applied on the power train system of hybrid electric vehicle, pure electric vehicle and fuel cell vehicle, etc. Meanwhile, the protocol is also compati-ble with conventional vehicle power train. Considering the topologies and control parameters of three kinds of electric vehicles suffi-ciently, and taking full advantage of CAN bus communication, the nodes’ source address, output parameters and parameter groups are all defined clearly in the general protocol. Under the baud rate of 500 kb/s, the protocol is validated through the experiments in both CANoe and hardware-in-the-loop platform which has been independently developed. The result shows that the communication performance fulfills the real-time requirements for control.

Key words: Hybrid electric vehicle  Fuel cell vehicle  Power train system  Communication protocol  Application layer

CLC No: TG 156

国家高技术研究发展计划(863计划, 2005AA01920)资助项目. Received 20070516, received in revised form 20071219

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