From PCBs to Battery Packs: The Power of Rapid Rate Testing.

While there is no single industry standard, a rapid rate temperature exchange chamber is generally considered to be a system capable of achieving temperature change rates (ramp rates) of 5°C/minute or faster. High-performance models can often achieve rates of 15°C/min, 20°C/min, or even higher, significantly accelerating the thermal cycling process compared to standard chambers.

A rapid rate temperature exchange chamber uses a single compartment where the air temperature is changed very quickly. A thermal shock chamber uses two or three separate compartments (hot, ambient, cold) and mechanically moves the product between them. Thermal shock produces a more instantaneous, severe stress, while a rapid rate chamber provides a more controlled, though still very fast, temperature ramp.

The main purpose is to perform accelerated stress testing. By repeatedly and quickly cycling a product between temperature extremes, a rapid rate temperature exchange chamber induces stress in materials and connections (like solder joints). This process, known as Environmental Stress Screening (ESS), is highly effective at precipitating latent manufacturing flaws and design weaknesses in a short amount of time.

Industries producing complex electronic or electromechanical products benefit the most. This includes automotive (testing ECUs and sensors), aerospace and defense (screening mission-critical electronics), telecommunications (validating network hardware), and battery manufacturing (testing the durability of battery packs). Any industry where thermal-induced failures are a concern can utilize a rapid rate temperature exchange chamber.

WBE offers a range of models to suit different needs. Our rapid rate temperature exchange chamber solutions can be configured to achieve various linear average ramp rates, often in the 5°C/min to 20°C/min range, depending on the chamber size, cooling system, and the thermal load of the product being tested. We specialize in engineering solutions to meet specific customer requirements.

Yes, absolutely. The specified ramp rate of a rapid rate temperature exchange chamber is typically measured with an empty chamber. The size, mass, and material of the product being tested (the "live load") will absorb thermal energy and can slow down the actual temperature change rate of the product itself. It's a critical factor to consider when selecting a chamber.