Conductive wireless charging

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Conductive wireless charging or simply conductive charging uses conductive power transfer to eliminate wires between the charger and the charging device.[1] It requires the use of a charging board as the power transmitter to deliver the power, and a charging device, with a built-in receiver, to receive the power. Once the charging board recognizes the valid receiver, the charging begins.[2]

Conductive power transfer uses a conductor to connect two electronic devices in order to transfer energy.[1] It is therefore not a form of wireless power transfer, which explicitly does not use conductors. In the area of cellular phone chargers, phones are equipped with an attachment such as a sleeve which, when placed on the charging board, transfers energy to the phone's battery.

Conductive charging system[edit]

Inductive and conductive charging are two types of wireless charging. Again, this is not to be confused with "wireless power transfer".

Conductive charging requires a physical connection between the electronic device's battery and the power supply.[3] The need for a metal-to-metal connection between the charger and the device requiring charging is one of the main drawbacks of this method.[4] To accomplish this without the use of physical cords connected to wall outlets, special attachments are made from electronic devices which are fitted with technology that can detect when the device makes connection with the power source, often a charging base. Conduction based wireless accessories may include changeable backs for cellular phones, special sleeves and attachable clips.[1]

The electronic devices, fitted with these accessories, are placed on a charging base. The base can detect when a compatible device has been placed on it and begin the battery charging process. These charging bases are usually designed to be able to distinguish between human and metal contact so that there is no risk of electrocution.[2] For example, the company Energysquare has developed its own technology based on a conduction process named Powerbycontact®. It provides an alternative way for consumers and professionals to refill their everyday's use devices, such as Laptops and smartphones, with the advantage of a safe recharge without any power loss.[5]

Electric vehicles[edit]

Honda studies charge-on-the-move for conduction between vehicle rollers and road power, with 100 kW of power (DC 375 V, 300 A) at a vehicle speed of 70 km/h, and possibly higher.[6]

Stanford scientists have developed a way to wirelessly deliver electricity to moving objects, the technology that could one day charge electric vehicles and personal devices.[7]

See also[edit]


  1. ^ a b c "Inductive vs. conductive charging". St. Louis Post Dispatch. 8 August 2010. Retrieved 9 June 2013.
  2. ^ a b "MWC 2013 : Kirk H&J shows new Wireless Charging Systen [sic] Inpofi at Showstoppers". 26 February 2013. Retrieved 11 June 2013.
  3. ^ Ken N. (15 February 2011). "Wireless charging: inductive or conductive?".
  4. ^ Boehret, Katherine (16 February 2011). "It's hard to cut the charging cord". Wall Street Journal.
  5. ^
  6. ^ Tajima, T., Tanaka, H., Fukuda, T., Nakasato, Y. et al., 2017 (2017-03-28). "Study of High Power Dynamic Charging System". SAE Technical Paper 2017-01-1245. doi:10.4271/2017-01-1245. Retrieved 18 May 2017.CS1 maint: multiple names: authors list (link)
  7. ^