Document Overview
Key Findings The CL3 camping light passed the thermal shock test, demonstrating stable illumination, normal charging function, and no significant performance degradation after exposure to extreme temperature cycling between −20 °C and 60 °C over 72 hours. Test Type: Thermal Shock (Cold-Hot Shock Test) Product:…
- Document type
- Test Report
- Prepared by
- Ryan Cooper
- Published
- Last reviewed
- Topics
- Environmental Testing
Key Findings
The CL3 camping light passed the thermal shock test, demonstrating stable illumination, normal charging function, and no significant performance degradation after exposure to extreme temperature cycling between −20 °C and 60 °C over 72 hours.
- Test Type: Thermal Shock (Cold-Hot Shock Test)
- Product: CL3 Camping Light (CL3-露营灯)
- Manufacturer: BTK
- Report No.: 20260423-001
- Test Date: 2026-04-21 to 2026-04-23
- Samples: 2 pcs
- High Temperature: 60 °C for 2 hours per cycle
- Low Temperature: −20 °C for 2 hours per cycle
- Total Storage Duration: 72 hours
- Verdict: PASS
Test Overview
| Field | Detail |
|---|---|
| Test Type | Environmental Testing — Thermal Shock (Cold-Hot Shock) |
| Standard / Test Basis | Internal engineering change verification (ECN) |
| Report No. | 20260423-001 |
| Page | 1 |
| Test Date | 2026-04-21 to 2026-04-23 |
| Product Name | CL3 Camping Light (CL3-露营灯) |
| Product URL | N/A |
| Manufacturer | BTK |
| Surface Treatment | / |
| Sample Quantity | 2 pcs |
| Test Reason | Engineering Change Notice (ECN) |
| Test Purpose | Evaluate the durability of samples stored under extreme temperature environments |
| Laboratory Environment | Temperature: 24 °C; Humidity: 45% RH |
| Test Class / Level | — |
Test Equipment & Setup
| Parameter | Detail |
|---|---|
| Instrument Name | Thermal Shock Test Chamber (冷热冲击试验机) |
| High Temperature Condition | 60 °C |
| High Temperature Duration | 2 hours per cycle |
| Low Temperature Condition | −20 °C |
| Low Temperature Duration | 2 hours per cycle |
| Total Storage Duration | 72 hours |
| Post-Test Evaluation | Functional test (lighting & charging) |
| Test Requirement | Verify performance stability, structural integrity, and optical performance under extreme environmental conditions |
| Laboratory Temperature | 24 °C |
| Laboratory Humidity | 45% RH |
Test Procedure
- Pre-Test: Record laboratory environment — temperature 24 °C, humidity 45% RH. Inspect both samples for any pre-existing physical damage or defects. Confirm sample quantity: 2 pcs.
- Setup: Place samples inside the thermal shock test chamber. Configure the program control profile for alternating high and low temperature cycles.
- High Temperature Phase: Set chamber to 60 °C and maintain for 2 hours.
- Low Temperature Phase: Set chamber to −20 °C and maintain for 2 hours.
- Cycling: Repeat high/low temperature cycles for a total cumulative storage duration of 72 hours.
- Functional Test: After completing the 72-hour thermal cycling, remove samples and conduct a functional test including: power-on illumination check (no short circuit, lights on immediately), charging function verification.
- Post-Test Inspection: Visually inspect samples for structural deformation, cracking, or surface anomalies. Record all observations.
- Acceptance Criteria: Lighting must operate stably with sustained illumination; no significant performance degradation; temperature compliance with safety requirements; charging function normal; no short circuits; product must meet outdoor high/low temperature usage requirements.
Test Data & Results
| Check Item | Observation | Result |
|---|---|---|
| Chamber Status During Test | Test running normally; thermal shock chamber operating as expected | Normal |
| Program Control Profile | Temperature cycle program control chart executed per specification | Normal |
| Short Circuit Check | No short circuit detected; light illuminates immediately upon power-on (无短路、通电即亮) | Pass |
| Charging Function | Charging function operating normally (充电功能正常) | Pass |
| Overall Lighting Performance | Light operates stably with continuous illumination; no significant performance degradation; temperature meets safety requirements; satisfies outdoor high/low temperature environment usage requirements | Pass |
Observations: Both samples successfully completed the 72-hour thermal shock profile cycling between −20 °C and 60 °C. Post-test functional verification confirmed no short circuits, immediate power-on illumination, and fully functional charging. Structural and optical performance showed no notable degradation.
Conclusion
| Field | Detail |
|---|---|
| Result | PASS (■ 合格 Pass) |
| Standard / Basis | Engineering Change Notice (ECN) — internal thermal shock verification |
| Test Conditions | High temp: 60 °C / 2 h; Low temp: −20 °C / 2 h; Total: 72 h; Lab: 24 °C, 45% RH |
| Samples Tested | 2 pcs — CL3 Camping Light |
| Verdict | The CL3 camping light meets durability requirements under extreme temperature cycling. Lighting is stable, charging is functional, no short circuits observed, and performance meets outdoor high/low temperature usage demands. |
Document Information
| Role | Name (Pinyin) |
|---|---|
| Approval (核准) | Mai Shaoqiang |
| Review (审查) | Zhang Ronggui |
| Tester (试验人) | Li Guanghua |
| Form Number (表单编号) | BTK-R-Q-087A/1 |
| Report No. | 20260423-001 |
| Page | 1 |
Frequently Asked Questions
What is a thermal shock test and why is it important for camping lights?
A thermal shock test (also called a cold-hot shock test) rapidly exposes a product to alternating extreme high and low temperatures to evaluate whether it can withstand the mechanical and material stresses caused by thermal expansion and contraction. For a camping light like the CL3, this confirms the product remains functional and structurally sound when used outdoors across seasons or in variable climates.
What temperature range was used in this CL3 thermal shock test?
The CL3 was tested at a high temperature of 60 °C (held for 2 hours per cycle) and a low temperature of −20 °C (held for 2 hours per cycle), with a total cumulative test duration of 72 hours inside the thermal shock chamber.
What was verified in the functional test after the thermal cycling?
After completing the 72-hour thermal shock profile, both samples were checked for short circuits, immediate power-on illumination response, and charging function. All checks passed with no anomalies detected.
Why was this test triggered by an Engineering Change Notice (ECN)?
An ECN test is conducted when a component, material, or manufacturing process for an existing product has been modified. Running a fresh thermal shock test after an engineering change ensures the updated design still meets the required environmental durability standards before production continues.
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