Insulation system of driving motor of new energy vehicle－Technical requirements
1Key Takeaways
This standard specifies the technical requirements for the insulation structure of drive motors of new energy vehicles. This standard applies to new energy vehicle drive motors with rated voltages of 1kV and below.
2Expert Interpretation
An in-depth interpretation of the technical specifications for the insulation structure of new energy vehicle drive motors in the T/CEEIA 415-2019 standard, covering core index requirements such as high-frequency impact resistance of electromagnetic wires, oil resistance of insulating materials, and flame retardancy, and providing implementation guidelines for thermal assessment and inspection rules for insulation structures.
Standard Background and Technology Evolution
As the world's first special standard for the insulation structure of new energy vehicle drive motors, T/CEEIA 415-2019 fills the technical gap at home and abroad. With the rapid development of the new energy vehicle industry, the insulation system of the drive motor faces multiple challenges such as high-frequency pulse voltage and oil cooling environment. This standard systematically regulates the insulation technical requirements of drive motors with voltage ≤1kV for the first time.
Analysis of core technical requirements
4.1 Requirements for insulating component materials
| Material type | Key indicators | Test method |
|---|---|---|
| Electromagnetic wire | High-frequency impact resistance life ≥12h (median value) | GB/T 4074.7 |
| Impregnating resin | Volatile matter ≤3%, heat resistance ≥180℃ | GB/T 15022.2 |
| Slot wedge | The glow wire does not ignite or goes out within 30s | JB/T 10508 |
4.2 Key indicators of insulation structure
1) Insulation resistance ≥500MΩ after 8 cycles of 155℃/-45℃ temperature
2) Partial discharge inception voltage (PDIV) retention rate ≥50%
3) Pass IEC 60034-1 withstand voltage test
Comparison of test methods
| Test type | Temperature condition | Number of cycles | Judgment criteria |
|---|---|---|---|
| Oil resistance test | 155℃↔-45℃ | 8 times | Appendix A Sealed tube preparation |
| Thermal assessment test | Multiple temperature points | 10 cycles | GB/T 17948.1 |
| Partial discharge test | Room temperature | - | GB/T 22720.1 |
Implementation suggestions
- Material screening: Preferably choose enameled round copper wire that has passed the standard 5.1 high frequency impact test
- Process control: The impregnation process must ensure that the volatile matter is ≤3%
- Verification cycle: The oil-cooled motor insulation material should be retested for oil resistance every year
- Document management: Keep complete sealing tube test records (Appendix A)