Constant Temperature and Humidity Test Chamber for Sealant

In the energy storage industry, constant temperature and humidity test chambers for sealants are critical equipment to ensure the sealing performance and durability of energy storage devices. The following provides a detailed introduction from four aspects: the role of the test chamber, technical parameters, application scenarios, and selection recommendations:

1. Role of the Test Chamber

Energy storage devices (such as energy storage battery cabinets, photovoltaic energy storage systems, etc.) need to operate long-term under complex climatic conditions. As a key protective material, the performance of sealants directly affects the device's waterproofing, dust resistance, and corrosion resistance. Constant temperature and humidity test chambers simulate extreme environments such as high temperature and high humidity, low temperature and low humidity, and alternating damp heat to accelerate the evaluation of the following properties of sealants:

Bonding stability: Check whether the bonding strength between the sealant and substrates such as metal or plastic degrades due to temperature and humidity changes.

Aging resistance: Evaluate the risk of cracking, powdering, or peeling of the sealant under long-term damp heat conditions.

Airtightness: Test the impact of sealant shrinkage or expansion under extreme temperature and humidity on the device's sealing performance.

Insulation performance: Verify whether the sealant maintains electrical insulation safety under damp heat conditions.

2. Key Technical Parameters

Technical requirements for sealant test chambers in the energy storage industry typically include:

Temperature range: -70°C to +150°C, covering extreme low temperatures (e.g., polar regions) and high temperatures (e.g., desert areas) that energy storage devices may encounter.

Humidity range: 10%RH to 98%RH, simulating environments from dry deserts to humid rainforests.

Temperature and humidity fluctuation: Temperature ≤ ±0.5°C, humidity ≤ ±2%RH, ensuring the accuracy of test data.

Temperature and humidity uniformity: Temperature uniformity ≤ 2°C, humidity uniformity ≤ 5%RH, avoiding test deviations caused by environmental differences inside the chamber.

Heating and cooling rate: Typically 3°C/min to 5°C/min to quickly simulate diurnal temperature variations or sudden climate changes.

Control system: Uses PID control algorithms, supports multi-segment programming, and allows preset temperature and humidity cycle curves (e.g., 85°C/85%RH for 168 hours).

3. Typical Application Scenarios

Energy storage battery cabinet sealing test:

Simulate long-term operation of battery cabinets in tropical rainforests (high temperature and high humidity) or cold regions (low temperature and low humidity) to verify whether the sealant cracks or delaminates.

Test the sealing performance of battery cabinets during sudden temperature changes (e.g., -40°C to +85°C) to ensure internal cells are not invaded by moisture.

Photovoltaic energy storage system protection test:

Evaluate the corrosion resistance of sealants in components such as photovoltaic inverters and junction boxes under combined salt spray and damp heat environments.

Simulate long-term use of photovoltaic modules in coastal areas (high salt spray, high humidity) or on rooftops (high temperature exposure + nighttime condensation) to test the weather resistance of sealants.

Overall sealing test for energy storage containers:

Conduct full-container damp heat tests on large energy storage containers to verify whether the sealants at door seams, interfaces, and other parts meet IP67 protection level requirements.

4. Selection Recommendations

Standard compliance:

Prioritize equipment that complies with domestic and international standards such as GB/T 2423.3-2016 (constant damp heat test), GB/T 2423.4-2008 (alternating damp heat test), and IEC 60068-2-30:2005.

If energy storage battery safety testing is involved, ensure compliance with specialized standards such as GB/T 36276-2018 "Lithium-ion Batteries for Electrical Energy Storage."

Equipment capacity and dimensions for constant temperature and humidity test chambers for sealants:

Select the test chamber volume based on sample dimensions, ensuring a distance of ≥100mm between the sample and the chamber walls to guarantee temperature and humidity uniformity.

For large energy storage components (e.g., battery modules), custom walk-in test chambers or reserved expansion interfaces are required.

Additional features:

Remote monitoring: Supports data export and curve analysis for easy traceability of the test process.

Safety protection: Equipped with features such as overtemperature alarms, leakage protection, and emergency shutdown to ensure operational safety.

Energy-saving design: Uses environmentally friendly refrigerants (e.g., R290) and energy regulation technologies to reduce long-term operating costs.

Supplier qualifications:

Choose suppliers with case studies in the new energy industry, such as manufacturers that have provided test equipment for companies like CATL and BYD.

Evaluate the supplier's after-sales service capabilities, including equipment calibration, repair response time, and spare parts supply.