Why do wireless products require Qi certification?
1. Introduction to Qi certification (what is Qi certification?)
The Qi standard is a wireless charging standard launched by the Wireless Power Consortium (WPC), a global standardization organization that promotes wireless charging technology. It uses the current mainstream electromagnetic induction technology and has two major characteristics: compatibility and versatility. As long as it is a product with the Qi logo, it can be charged with a Qi wireless charger. And because it solves the versatility problem, mobile phones, cameras, computers and other products can be charged with Qi wireless chargers in the near future, which provides the possibility for large-scale applications of wireless charging. On the morning of August 31, 2010, the International Wireless Charging Consortium (WPC) released the Qi wireless charging international standard at the Diaoyutai State Guesthouse in Beijing, introducing the standard to China.
2. Why do we need Qi certification?
Qi products are applicable to countries and regions around the world, such as the United States, China, Japan, the European Union, etc., and can be sold globally after certification. The Qi logo can be used in any form on product promotion, packaging, and product labels.
At present, Qi is widely used in handheld low-power devices such as mobile phones and smart bracelets. In the vision plan, WPC plans to implant Qi charging stations in public places such as homes, cars, trains, etc., so that consumers can enjoy the infinite convenience brought by wireless charging anytime, anywhere, conveniently and quickly.
With the intervention of the WPC Alliance, Amazon's crackdown may be intensified, and major e-commerce platforms will follow closely. The Qi certification of wireless charging products will become market access.
3. Qi certification standards (Qi certification test content)
WPC has announced a new Qi V1.2.4 certification standard. The certified products are divided into two types: BPP (Baseline Power Profile) and EPP (Extended Power Profile) according to different load powers. BPP covers products with output power less than or equal to 5W; EPP includes products with output power greater than 5W up to 30W.
Whether it is BPP or EPP, the Qi certification test process consists of two parts. One is the Compliance Test, and the other is the Qi Interoperability Test.
Compliance test: The sending party needs to send a total of at least 5 prototypes for testing, of which one will be arranged for compliance testing first, and the compliance test samples will remain in the compliance testing laboratory after the test passes.
The main test content includes
— The timing of the communication protocol between the transmitter and the receiver
— Test the power output capability by XYZ axis translation
— The supply capacity of energy transmission
— FOD (Foreign Object Detection)
Compatibility test: After passing the conformance test, the conformance test laboratory will divide the other four of the test prototypes into two groups and send them to the laboratories in Belgium and South Korea for compatibility test items. Two samples remain in the main compatibility test laboratory, and the other two remain in the auxiliary compatibility test laboratory. After the main compatibility testing laboratory receives the samples sent by the compliance testing laboratory, it will start compatibility testing. After the compatibility test is completed, the sender can perform the "confirm completion" action on the computer, and the product can be included in the WPC, and the product will be stored on the test bed. The current Test bed has about 400 transmitters and 100 receivers.
Compatibility testing includes two aspects. When the transmitter and receiver are put together, the two need to establish communication within 3 seconds. Second, in the case of test product battery power of 10% to 20%, it needs to maintain charging for five minutes.
Qi certification is a dual challenge to manufacturers and brand owners in terms of cost and technology. If they can face international standards proactively and calmly, or even require their design standards to be higher than international standards, they will undoubtedly become the market leader.
