What is Qi-Wireless Charging?

wireless charging

Qi standard allow to make Wireless Charging

Qi (pronounce “Chee”) is a standard that allows the charging of a device (mobile device) by a charger (base station). Using induction, it operates over a distance in the range of a few centimeters. Wireless charging works as easy as taking your device and putting it on the charger. You don’t have any other manipulation to do, the phone and the charger will recognize each other and make the transaction of power.

How is the Qi standard organized?

The first version of the standard has been released in 2008. This technology has been developed by the Wireless Power Consortium (WPC) and its contributing members, and is integrated today in the majority of today’s middle end and high end smartphones, through the pure implementation of the Qi standard, or proprietary dialects (Samsung Fast Charge or Huawei’s 30W wireless charging are examples).

The WPC has a compliance policy in place, whose benefits for implementers include:

  • having their products listed on the WPC website as certified
  • possibility to use the Qi logo on their products and their packaging

The certification process defined by the WPC happens in two major steps:

  • conformance testing, where the DUT will be tested according to the Qi test specification
  • interoperability testing, where the DUT will be confronted to a test bed of Qi certified devices and needs to be able to interoperate with them in a satisfactory manner.

As of November 2019, more than 5000 products have been certified by the WPC within the Qi standard.

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