GB/T NATIONAL STANDARD OF THE PEOPLE S REPUBLIC OF CHINA. The reliability test methods of drive motor system for electric vehicles

Transcription

1 Translated English of Chinese Standard: GB/T Translated by: Wayne Zheng et al. ICS T 21 NATIONAL STANDARD OF THE PEOPLE S REPUBLIC OF CHINA GB/T The reliability test methods of drive motor system for electric vehicles 电动汽车用驱动电机系统可靠性试验方法 Issued on: December 31, 2112 Implemented on: June 01, 2013 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People s Republic of China; Standardization Administration of the People s Republic of China Page 1 of 13

2 Table of Contents Foreword Scope Normative Reference Terms and definitions Test Conditions Test Procedures Reliability Test Inspection and Maintenance Systemize the Test Results Reliability Evaluation Test Report Annex A Page 2 of 13

3 Foreword This Standard is drafted according to the rules specified in GB/T This Standard is proposed by Ministry of Industry and Information Technology of the People s Republic of China. This Standard is under the jurisdiction of National Technical Committee of Auto Standardization (SAC/TC 114). This Standard is drafted by organizations: Beijing Institute of Technology, Chinese Automotive Technology & Research Center, Shanghai Edrive Co., Ltd., CRS Zhuzhou Institute Co., Ltd., Tianjin Qingyuan Electric Vehicle Co., Ltd., SAIC Motor Corp., Shenzhen BYD Auto Co., Ltd., Chongqing Chang an New Energy Automobile Co., Ltd., China Tex Mechanical & Electrical Engineering Co., Ltd., Board-Ocean EV Technology Co., Ltd., and JJE Technology (Beijing) Co, Ltd. The main drafters of this Standard are: Song Qiang, Sun Fengchun, Gong Jun, Guo Wei, Guo Shuying, Fu Zhenxing, Cai Wei, Dou Ruzhen, Meng Xiangfeng, Jia Aiping, Yan Zhiping, Bi Ronghua, Zhu Xuguang, and Xiao Wei. Page 3 of 13

4 The reliability test methods of drive motor system for electric vehicles 1 Scope This Standard specifies general reliability test methods of drive motor system for electric vehicles on test bench, including reliability test load specifications and assessment methods. This Standard applies to drive motor system for electric vehicles driven by electric motor or jointly driven by engine and electric motor. 2 Normative Reference The articles contained in the following documents become part of this Standard when they are quoted herein. For the dated documents so quoted, all the modifications (Including all corrections) or revisions made thereafter shall be applicable to this Standard. GB/T Electrotechnical terminology - Dependability and quality of service GB/T (all parts) The electrical machines and controllers for electric vehicles GB/T Terminology of electric vehicles QC/T Failure classification and assessment of electrical machine system for electric vehicle 3 Terms and definitions The terms and definitions defined in GB/T , GB/T (all parts), GB/T 19596, and QC/T , and following definitions and terms apply to this document. 3.1 Continuous Torque Maximum and long-term working torque - under specified S1 working system, and under rated voltage and rated speed of automotive drive motor system. 3.2 Maximum Work Speed Corresponding to motor speed of electric vehicles at the highest driving speed, at such speed Page 4 of 13

5 7.4.1 Allow shutdown one time; make an inspection tour for testing equipment and inspect fastener, mechanical adapting piece and piping, especially the hose; and inspect connecting cable and port; in principle, inspect the rack itself only Inspect liquid level of cooling liquid and whether there is a leak and other phenomena in cooling system; supplement cooling liquid when necessary Time of shutdown inspection shall be no less than 0.5h. 7.5 Handling for Failure and Shut Down Record the reason of each shutdown and operation contents In case of a failure, conduct failure analysis, eliminate failure and make a record The interrupted load cycle will not be included in reliability working hours of drive motor system. In case that shutdown time is more than1h, then, 1h after cycle is started again will not be included in reliability working hours of drive motor system. 8 Process Test Results 8.1 Record according to QC/T , provide photos when necessary and conduct precise analysis. 8.2 Based on actual running time (h) of the drive motor system under tested and records during running, evaluation is conducted according to Chapter IX. 9 Reliability Evaluation 9.1 Actual running time of the drive motor system under tested shall be no less than 402 h. 9.2 Mean time to first failure, number of failure shutdown and mean time between failures are used for evaluating reliability test failure. Mean Time to First Failure MTTFF (1) (2) Where: MTTFF - Estimatd value of mean time to first failure, the unit is in hour (h); Page 9 of 13

6 Test report shall at least include: a) Foreword: Explain the source of test tasks; b) Test basis; c) Test objectives; d) Test object: indicate the main parameters of drive motor system tested and attach graphs, photos and necessary description; e) Test equipment and instruments: name, manufacturers, model, precision, other basic parameters like calibration date and measurement locations of the main equipment and instruments shall be indicated clearly; f) Difference between test condition and standard; g) Test results: 1) Systemize the original test date and present them by using curve as far as possible, and list can be made for important data; 2) Calculated results of reliability evaluation index; 3) Statistics of failure and maintenance; 4) Adjustment and replacement record during test; 5) Performance test result; h) Conclusions and suggestions: 1) Describe the mode, type and quantity of failures; 2) Describe mean time to first failure and mean time between failures; 3) When necessary, put forward improvement and supplementary test advices based on the reliability test results; i) Test date. Page 11 of 13

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