First of all, everyone has many questions about the safety performance of heated clothing:

1. Will the leakage cause human injury?

"The national legal safety voltage standard is: under normal and fault conditions, any conductor between any two conductors and the ground must not exceed the effective value of AC (50-500Hz) 50V. Under normal environmental conditions, continuous contact" safety characteristics "Low voltage" is 36V. "Most of the heating clothing on the market use conventional charging treasure as the power source, and the power source of the charging treasure is 5V, which is far lower than the safe voltage. In this respect, heating the chip is safe.

2. How to distinguish various heating chip clothing on the market?

There are several types of heating chips on the market, and the price gap is also very large. The price gap is 2-5 times: the wire-type heating chip is the heating chip commonly used in electric blankets. This is a many-year old technology. Advantages Because the price is cheap, there are not many shortcomings, and there are many risk cases. Carbon fiber heating chip --- Carbon fiber is mainly made of acrylic fiber and viscose fiber at high temperatures. It has high tensile strength and is mainly used to form high-strength composite materials with polymers. However, raw silk is brittle and easily broken by bending. The resistance at the fracture location will differ by dozens of times. At this location, the local temperature is too high, and it is easy to catch fire or burn at low temperatures. Can only do power control. The advantage is that the price is very cheap. Graphene heating chip ---

: some are carbon fiber + a small amount of graphene powder, the disadvantage is also easy to break, relatively hard, more wires, can not do temperature control. Power control. As the heating time increases, the temperature gradually increases, the temperature is not constant, and the lack of high-temperature protection. Carbon nanotube heating chip --- The thickness of the carbon nanotube film is less than 10 microns, and it is self-supporting. Therefore, the carbon nanotube film heating sheet can be encapsulated by a very simple process, thereby reducing its thickness and greatly maintaining it. Carbon nanotube film flexibility.

3. Can I wash it?

Will the washing water cause a short circuit? Most heating chips will emphasize the washable water function, but compared to several heating chips, some heating chips are more resistant to rubbing.
These are some of the problems you will encounter when choosing a heated down jacket!