How to do the constant damp heat test of digital equipment mobile power supply?

The scope of application of GB/T 35590-2017 is that the input voltage is not more than 250V, the output DC voltage is not more than 60V, the output current of each port is not more than 5A, and the mobile power supply adopts the wired output method. Let's take a brief look at the constant damp heat test method.

Damp heat test of mobile power supply for digital equipment:

Test equipment: damp heat test chamber/high and low temperature alternating damp heat test chamber

Equipment Model: Huanyi Instrument HYH-225

Reference standard: GB/T 35590-2017 General specification for mobile power supply for portable digital equipment

1. Constant damp heat test under working conditions:

After the battery is charged, put it in a constant temperature and humidity chamber at 35°C ± 2°C and a relative humidity of 75% to 80% for 2 hours to stabilize the temperature and humidity of the sample. During this period, power up and work. The recovery time was 2 h and the final detection was performed.

2. Constant damp heat test under storage and transportation conditions:

After the battery is charged, put it in a constant temperature and humidity chamber with a relative humidity of 90% to 95% at 40°C ± 2°C for 48 hours, and the sample will not work during this period. The recovery time is not less than 2 h, and the final detection is carried out until the condensation disappears.

This standard requires that the lithium-ion batteries and battery packs inside mobile power products comply with CB 31241-2014 "Safety Requirements for Lithium-ion Batteries and Battery Packs for Portable Electronic Products". It is worth noting that most of the cells or cell parallel blocks used in the mobile power supply do not have any protection function, and all the protection functions are concentrated in the whole circuit of the mobile power supply product.

If you have any doubts about the above constant damp heat test, you can visit the official website of "Huanyi Instrument" and consult relevant technical personnel.