Qi Electronic Power Wireless Standard

The ability to wirelessly transmit electricity has haunted scientists for over 190 years. In 1820, the Danish scientist Hans Christian Oersted in his experiments noted that the current flowing through the circuit causes the magnetic needle to deflect.

In 1831, Michael Faraday proved that a change in the magnetic flux passing through a closed circuit leads to the appearance of an electric current in it.

Nikola Tesla at the beginning of the 20th century, on the basis of his experiments, first proved the possibility of wireless power transmission.

For more than a hundred years, scientists from different countries have conducted many experiments on the transmission of electrical energy over distances.

In 2006-2007, WiTricity and Wrel wireless power transmission technologies were introduced.

Since that time, companies one after another began to introduce wireless recharging devices for phones, players, and so on.

Mat for wireless charging phones

There was a need to create a single standard for all devices powered wirelessly.

In 2008, the Wireless Power Consortium, WPA, was created. The organization includes more than 180 members, these are companies leaders in the field of mobile phones, consumer electronics, batteries.

In 2009, the organization developed the Qi standard (from Chinese qi - the flow of spiritual energy). The standard provides for wireless charging of low-power electrical appliances up to 5 W at a distance of up to 4 cm. Such devices, first of all, include mobile phones, the charging power of which is about 2.5 W.

Phones that support the Qi standard, release all the leading manufacturers of mobile phones: Asus, HTC, Nokia, Samsung, LG and others. Any phone and charger that supports the Qi standard and located at a distance of less than 4 cm will recognize each other, after which the charging process is located.

The logo that is applied to all devices that support Qi technology

The idea was supported by leading German car manufacturers: Mercedes-Benz, Audi AG, BMW Group, Volkswagen AG. The latest models of their cars began to be equipped with wireless chargers that support the Qi standard.

The next step in the work of WPA will be the creation of a standard for charging devices with a power of up to 120 W, which will significantly expand the scope of wireless power transmission.

In March 2013, a consortium group was created that is developing a standard for the wireless operation of kitchen appliances. The result of the work of the group will be the creation of kitchen appliances that will work wirelessly in the working area of ​​the kitchen.

Haier Wireless Blender & Rice Cooker

There is every reason to say that in the future, the Qi standard will also firmly enter our lives as the Bluetooth and Wi-Fi standards. When buying household appliances in stores, we will first of all pay attention to the Qi logo, because no one will want to pull electric wires around their home.