GB/T 10485-2025 in English
VALIDRoad vehicles—Lighiting and light-signalling devices—Environmental endurance
- Issued on:2025-01-24
- Implemented on:2025-08-01
- File Format:PDF
- Delivery:Via email within 1 business day
$626.00
| Standard No: | GB/T 10485-2025 |
| Document status: | VALID |
| Title in English: | Road vehicles—Lighiting and light-signalling devices—Environmental endurance |
| Title in Chinese: | 道路车辆 外部照明和光信号装置 环境耐久性 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1 business day |
| Issued on: | 2025-01-24 |
| Implemented on: | 2025-08-01 |
| Superseding: |
GB/T 10485-2007 Road vehicles—Lighting and light-signalling devices—Environmental endurance
|
| ICS Classification: | 43.040.20-Lighting signalling and warning devices |
| Chinese Classification: | T38-Lighting and signaling equipment |
| Professional Classification: | GB-National Standard |
| Related Keywords: | application m/n/o vehicles new l-class vehicles test items
road vehicles low temperature step rule rapid temperature change environmental endurance introduction key points random vibration test |
| Related Topics: | and light
road vehicle standards Lighting and light signaling devices |
《GB/T 10485-2025道路车辆 外部照明和光信号装置 环境耐久性》由TC114（全国汽车标准化技术委员会）归口，TC114SC21（全国汽车标准化技术委员会灯具及灯光分会）执行，主管部门为工业和信息化部。
Introduction
Key points of the core revision of the standard
| Revision dimensions | 2007 edition | 2025 edition |
|---|---|---|
| Scope of application | M/N/O vehicles | New L-class vehicles |
| Test items | 13 categories | New HALT/HASS and other 17 categories |
| Technical indicators | Luminous intensity change ≤30% | Strict as ≤20% |
Key test technical requirements
1. Thermal cycle test system
The standard constructs a dual-cycle test mechanism:
- High and low temperature test: -40℃~90℃ (60℃ for Class L), temperature change rate 1-4℃/min
- Wet heat cycle test: 8 cycles (headlights)/4 cycles (signal lights), 80℃&80%RH→-40℃ alternation
Judgment criteria: No deformation or blistering of the light distribution mirror, brightness change <20%, no bubbles in the sealing test
2. Vibration test upgrade
Typical application cases
In the random vibration test of a certain electric vehicle headlamp (20.9m/s² effective value), it is necessary to ensure that:
- The offset of the light and dark cut-off line is ≤±1° (horizontal)/±0.4° (vertical)
- The resonance characteristics of the bracket meet the frequency doubling requirements of 11.4.1
| Vibration type | Acceleration spectral density | Applicable models |
|---|---|---|
| Random vibration | 6.74(m/s²)²/Hz (N/O category) | Commercial vehicle |
| Impact vibration | 19.05mm eccentric wheel impact | Lamps with size ≤400mm |
In-depth analysis of new tests
1. Highly Accelerated Life Test (HALT)
Adopt 5-step stress step method:
- Low temperature step: 10-20℃/step, to OL/DL limit
- High temperature step: same as low temperature step rule
- Rapid temperature change: 40℃/min, 5 cycles
- Vibration step: 5grms step, to 50grms
- Comprehensive stress: temperature change + vibration combination
Equipment requirements: Temperature change range -100~170℃, vibration bandwidth 5-10kHz
2. Fog test innovation
Establish a dual-chamber environmental simulation system:
- Mask cabin: 20℃/70-80%RH + spray (18L/min)
- Lamp housing cabin: front lamp 70℃/5-15%RH
- Judgment: No fog within 20 minutes of spraying, and dissipated within 2 hours
Implementation suggestions
Corporate response strategy
- Material selection: The photometric lens needs to pass the 4,500MJ/m² irradiation test (Δtm≤0.020)
- Structural design: The lens unit needs to pass the 9-position focusing test (70℃/1h)
- Verification process: It is recommended to implement in groups according to the test sequence in Appendix A
Note: For 24V system devices, all tests must be performed under 28.0V±0.1V conditions
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