Standardized Research on High-Voltage Safety of Drive Motor Systems
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Keywords

Drive motor system
High-voltage safety
Functional safety design
HAZOP method

DOI

10.26689/jera.v9i3.10509

Submitted : 2025-04-15
Accepted : 2025-04-30
Published : 2025-05-15

Abstract

This paper focuses on the high-voltage safety of drive motor systems in new energy vehicles and conducts standardized research on functional safety design in the concept phase. In view of the lack of high-voltage hazard analysis for drive motor systems in existing standards, based on theories such as GB/T 34590 and ISO 26262, the safety levels are deeply analyzed. The HAZOP method is innovatively used, and 16 types of guidewords are combined to comprehensively analyze the system functions, identifying vehicle hazards such as high-voltage electric shock caused by functional abnormalities, including high-voltage interlock function failure and abnormal active discharge. Subsequently, safety goals such as preventing high-voltage electric shock are set, functional safety requirements such as accurately obtaining collision signals and timely discharging high-voltage electricity are formulated, and requirements for external signal sources and other technologies are clearly defined, constructing a complete high-voltage safety protection system. The research results provide important technical support and standardized references for the high-voltage safety functional design of drive motor systems in new energy vehicles, and are of great significance for improving the high-voltage safety level of the new energy vehicle industry, expecting to play a key role in subsequent product development and standard improvement.

References

ISO 26262, 2011, Road Vehicle—Functional Safety, viewed March 25, 2025, https://www.iso.org/standard/43464.html

State Administration for Market Regulation, National Standardization Administration, 2023, GB/T 43254-2023 Functional Safety Requirements and Testing Methods for Drive Motor System of Electric Vehicles, viewed March 25, 2025, https://openstd.samr.gov.cn/bzgk/gb/newGbInfo?hcno=D67A584F3A0BCB707710D0A599BAA0AF

Li Y, Liu W, Liu Q, et al., 2024), Complying with ISO 26262 and ISO/SAE 21434: A Safety and Security Co-Analysis Method for Intelligent Connected Vehicle. Sensors, 24(6): 1848. https://doi.org/10.3390/s24061848

SAE J2980, 2018, Considerations for ISO 26262 ASIL Hazard Classification (2015, 2018 Ed.), viewed March 25, 2025, https://www.sae.org/standards/content/j2980_201804/