Thermal shock test of road vehicle lamps

Thermal shock test is used to assess the adaptability of products to sudden changes in ambient temperature. It is an indispensable test in the qualification test of equipment design and finalization and the routine test in the batch production stage. In some cases, it can also be used for environmental stress screening test. The thermal shock test for road vehicle lamps determines the thermal shock resistance of headlamps and front fog lamps.
Zhongke Testing Reliability Experiment Center has the ability to test the environmental durability of various lighting devices, and provides professional thermal shock testing services for external lighting and optical signaling devices of road vehicles.

Vehicle front lights include: low beam, high beam, front position lights, daytime running lights, front turn lights, front fog lights, corner lights, side turn lights, parking lights;
Vehicle rear lights include: brake lights, rear position lights, rear turn lights, reversing lights, rear fog lights, rear retroreflectors, high-mounted brake lights, license plate lights;
Common lights for large vehicles include: front profile lights, rear profile lights, side marker lights, reflective logos, and tail sign boards.

1. In a room temperature environment without airflow, the sample should usually be lit at maximum power for 30 minutes. For multi-light units the relevant functions should be lit. The test voltage should be 13.2 V±0.1 V (or 28.0 V±0.1 V).
2. After the lighting is completed, the entire outer surface of the light distribution lens is immediately immersed in water at 23℃±5℃ for 5 minutes.
3. Result judgment: After the test, visually inspect the light-transmitting parts to have no cracks or blisters.

GB/T 10485-2007 Road vehicles Exterior lighting and optical signaling devices Environmental durability
ISO/DIS 12346 Road motor vehicles - Lighting and light signaling devices - Environmental durability
GB 4599 Automotive filament bulb headlamp
GB 4660 automotive filament bulb front fog lamp
GB 4785 Regulations for the installation of exterior lighting and light signaling devices on automobiles and trailers
GB 5920 Light distribution performance of front position lights, rear position lights, position lights and brake lights of automobiles and trailers
GB 11554 Light distribution performance of rear fog lights of automobiles and trailers
GB 15235 Light distribution performance of car and trailer reversing lights
GB 17509 Light distribution performance of automobile and trailer turn signal lights
GB 18099 Light distribution performance of car and trailer side marker lights
GB 18408 Light distribution performance of rear license plate lighting devices of automobiles and trailers
0 GB 18409 Automotive parking light light distribution performance
1 GB 21259 Gas discharge light source headlamps for automobiles