The Wireless Charging Alliance (abbreviation: WPC Alliance) is a cooperative organization formed by a number of independent companies. The qi standard is an international standard established by WPC for compatible wireless charging docks. Mobile phones, cameras, remote controls and all electronic products with the qi logo will be compatible with all charging cradles with the logo.

In the current commercial mobile wireless charging field, the qi standard of the WPC Alliance has an absolute advantage. As of August, 628 companies worldwide have joined qi members, including internationally renowned companies such as Apple, Samsung, LG, and Haier.

The "qi" logo belongs to the WPC Alliance. To use this logo on wireless charging products, you first need to be authorized by WPC. If used without authorization, it is infringing and will be punished by WPC or face product removal. In addition, after the wireless charging products have passed the qi certification, all indicators meet the requirements of the qi standard, which is also a guarantee of the quality of the product itself. Consumers using products that have passed the qi certification are obviously safer and more reliable than those that have not passed the qi certification.

To apply for qi certification for a product, the company first needs to register as a WPC member and pay the membership fee. Members include small business members, ordinary members, fully qualified members and founding members. Different members pay different membership fees and obtain different rights.

After the company applies to become a WPC member and pays the annual fee, it can apply for authorization to use the "qi" logo, and send the company's corresponding documents to the qi headquarters, and the authorization can be obtained after the review is passed.

At the same time of obtaining authorization, you can prepare 5 functional prototypes (select wireless charging solutions that can pass qi certification, such as NXP, Xuxinsheng, Sunplus, Yicharging, etc.) and send them to WPC designated domestic certification laboratories, such as Anzheng , SGS, Purity, etc., and then the solution company and the customer fill in the corresponding product model, WPC member name and certification type. 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, and EPP includes products greater than 5W to 30W. After that, the test fee is paid. The domestic certification laboratory BPP certification fee is generally 25,000-30,000 yuan, and the EPP certification fee is about 150,000 yuan.

1. Compliance test

Compliance test laboratory ATL (Authorized Test Lab) currently has many options in China. At least one of the 5 prototypes sent for testing will be arranged for compliance testing first, and compliance test samples will remain after the test passes. ATL. The main test contents include:

A. The timing of the communication protocol between the transmitter and the receiver;

B. Test the power output capability through the translation of XYZ axis;

C. Large supply capacity of energy transmission;

D. FOD (Foreign Object Detection)

2. Compatibility test

There are only two IOC (Interoperability Test Center) in the world, namely Belgium in Europe and South Korea in Asia.

After passing the compliance test, ATL 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 testing projects. The two samples will remain in the main IOC laboratory. Two stay in the auxiliary IOC laboratory. After the compatibility test is completed in the IOC laboratory, the sender can perform the "confirm completion" action on the official website, and the product will be included on the WPC official website. Enter the product ID number to query the official website, and the tested product will be retained On the Test Bed.

According to WPC requirements, all test samples need to be tested for compatibility with all previous certified samples. For example, the tested product is a wireless charging transmitter, then it needs to be tested with all Qi-certified receivers (including mobile phones) of WPC Compatibility test. According to the Qi test process, the products sent for testing will be sent for compatibility testing after the compliance test is passed. If the compatibility test fails, the samples need to be brought back and re-rectified. After the rectification is completed, it cannot be sent directly for compatibility testing, but it needs to be tested again for compliance and compatibility testing.

Calculated according to the normal test time, if the product sent for testing does not have any failed items, it will pass all the test items at one time, the required time is 4-5 weeks, plus some turnaround time, so the general certification cycle is 1.5-2 About a month.

According to WPC data, taking November of the peak of certification in 2017 as an example, a total of nearly 30% of the products sent for testing failed the first compatibility test, while the first failure rate of EPP tested samples was as high as 61.5%, even if the BPP test is now more common, there is still a failure rate close to 20%.

Therefore, choosing a suitable solution before product development is of great help to subsequent certification. Xu Xinsheng's wireless charging solution has been continuously updated and optimized, and the passing rate of BPP certification has been greatly improved.