GB/T 19752-2024 in English
VALIDHybrid electric vehicles—Power performance—Test method
- Issued on:2024-08-23
- Implemented on:2025-03-01
- File Format:PDF
- Delivery:Within 1 day
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《GB/T 19752-2024混合动力电动汽车 动力性能 试验方法》由TC114（全国汽车标准化技术委员会）归口，TC114SC27（全国汽车标准化技术委员会电动车辆分会）执行，主管部门为工业和信息化部。
Introduction
Background of Standard Revision and Technological Evolution
GB/T 19752-2024, as the national standard for hybrid electric vehicle power performance testing, replaces the 2005 edition of the standard. This revision mainly responds to the following technical development needs:
| Technical Dimensions | 2005 Edition | 2024 Edition | Main Changes |
|---|---|---|---|
| Test Mode | Hybrid/Pure Electric Dual Mode | Focus on Hybrid Mode | Delete Pure Electric Mode Related Test Items |
| REESS Management | Simple Charging Requirements | Detailed Charging Specifications | Added 5.1.3 Charging End Judgment Criteria |
| Test Method | 8 Test Procedures | 6 optimized tests | Added 7.4 Acceleration capability test |
Analysis of core test methods
4.1 Test vehicle requirements
The standard puts forward strict requirements on test vehicles:
- Run-in mileage: must be greater than 300km, plug-in hybrid power must complete a full charge and discharge cycle
- Energy storage system: All non-driving energy storage systems should be charged to the recommended value
- Tractor: The matching trailer shall not increase the frontal area
7.2 30-minute maximum speed test
Key improvements:
| Parameters | Requirements | Measurement methods |
|---|---|---|
| Speed stability | ±5% estimated value interval | Average speed calculated using formula (2) |
| Failure handling | 2 retry opportunities | Need to re-estimate the maximum speed |
| Test site | Circular road/chassis dynamometer | New dynamometer test specification |
Detailed explanation of key technical changes
5.3 New regulations on vehicle test quality
The standard clarifies the loading requirements for different types of vehicles for the first time:
M1 vehicles: loading in stages according to the designed loading mass (180kg is the critical value)
Commercial vehicles: city buses at 65% of the maximum loading mass, tractors at the maximum designed total mass in train status
Typical case: test mass of a plug-in hybrid SUV = curb mass + 180kg (design loading mass 350kg)
7.4 Innovation in acceleration capability test
Two new test procedures are added:
- Start-from-spot test: acceleration from rest to 100km/h or 90% of the maximum vehicle speed
- Overtaking acceleration test: full throttle acceleration from a starting speed of 30/60km/h
Data processing requires a coefficient of variation of ≤3% (start-from-spot), ≤6% (overtaking)
Implementation suggestions
Test preparation phase
- It is recommended to establish a REESS charging and discharging monitoring system to ensure compliance with the charging time formula requirements in 5.1.3
- The environmental monitoring equipment must meet the accuracy requirements of Table 1 in 4.3, especially wind speed measurement (±0.5m/s)
Test execution phase
- The tire pressure should be increased by 20kPa during the ramp test (Clause 7.1.1)
- Note the requirement of 7.1.7: the hybrid mode shall not switch automatically
Data recording points
The 21 parameters required by Appendix B must be recorded, including:
- Drive motor peak power and corresponding speed
- Initial SOC value of the test
- Ring road correction factor k (Appendix A)
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