Development of Diagnostic Equipment for ECU Parts Used in Electric Vehicles

Abstract

Electric vehicles use lots of ECU controllers in the CAN network, the quality of ECU parts used in vehicles is closely related to safe driving. This paper develops a kind of fault diagnostic equipment for electric vehicles' ECU controllers. This device has designed digital input signal acquisition module, the output switch signal module, power supply module and fault simulation module based on CAN bus communication principle. Then we use LabVIEW developing computer program in order to monitor and control the whole system. Keywords-Electric Vehicle; ECU; Fault diagnosis LabVIEW;CAN Bus I. INTRODUCTION The rapid development of Chinese economy has made car ownership in China surpassed the global average level and grow rapidly. But China is lack of oil resources, problems of over-consumption of oil resources caused by fuel vehicles, and air pollution caused by fuel vehicle emissions should not be ignored any more. In the face of enormous pressure on energy and environmental protection, clean energy vehicles, especially pure electric vehicles have become the mainstream in today's world. The electric car uses controller area (CAN bus) structure, information can be shared, wires harnessed on the car is significantly reduced, the reliability of data has been improved. CAN network of electric vehicles use a variety of electronic control units (ECU), whether ECUs could operate reliably is closely related with the safe and reliable operation of the electric vehicles. As a new energy vehicle, the detection equipment of electric vehicles remains to be the developed, and detection methods are lack of a certain standard. Not only the detection of vehicle products is not strong, but the detection of key components such as power battery has lagged behind more which is extremely detrimental to the independent development of the industry in the future. Therefore, there is a great significance in developing a kind of diagnostic equipment for Electric Vehicle ECU test.