Conductive charging using contacts instead of wires, sometimes called conductive wireless charging, is conductive power transfer that replaces the conductive wires between the charger and the charged device with conductive contacts. Charging infrastructure in the form of a board or rail delivers the power to a charging device equipped with an appropriate receiver, or pickup. When the infrastructure recognizes a valid receiver it powers on, and power is transferred.

Phones and other electronic devices

Conductive power transfer uses

electrical contacts An electrical contact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers. Each contact is a piece of electrically conductive material, typically metal. When a pair of contacts touch, they ca ...

to connect a power supply to a portable device in order to transfer energy. The need for a conductor-to-conductor connection between the power supply and the device is the main difference from inductive or capacitive wireless charging. The conductive power supply, often a charging base or pad, detects when a compatible receiver or pickup is placed on it. Contact-based accessories may include changeable backs for cellular phones, special sleeves, or attachable clips. The charging bases are designed to identify a compatible receiver and only power up when it's detected to avoid risk of

electrocution Electrocution is death or severe injury caused by electric shock from electric current passing through the body. The word is derived from "electro" and "execution", but it is also used for accidental death. The term "electrocution" was coined ...

Open Dots JVIS is an automotive electronics and accessories supplier based in Michigan. Open Dots Open Dots is a conductive charging specification that was promoted by the Open Dots Alliance, a 501(c)(6) non-profit organization, which was formed by JVIS ...

is a specification for such charging pads and receivers using contacts instead of wires.

Electric vehicles

Elways electric truck dynamic charging electric road eRoadArlanda project 2019-05-16

Sweden has tested

electric road An electric road, eroad, or electric road system (ERS) is a road which supplies electric power to vehicles travelling on it. Common implementations are overhead power lines above the road and ground-level power supply through conductive rails or ...

systems that charge the batteries of private electric vehicles, and among the tested systems are two ground-level power supply systems that began testing in 2017. The in-road rail system is planned to deliver up to 800 kW per vehicle traveling over a powered segment of the rail, and the system is estimated to be the most cost-effective among the four tested systems. The new systems are expected to be safe, with segments of the rail being powered only when a vehicle is traveling over them. The rails have been tested while submerged in salt water and were found to be safe for pedestrians. The

European Commission The European Commission (EC) is the executive of the European Union (EU). It operates as a cabinet government, with 27 members of the Commission (informally known as "Commissioners") headed by a President. It includes an administrative body o ...

published in 2021 a request for regulation and standardization of electric road systems.

Alstom Alstom SA is a French multinational rolling stock manufacturer operating worldwide in rail transport markets, active in the fields of passenger transportation, signalling, and locomotives, with products including the AGV, TGV, Eurostar, Avelia ...

and other companies have, in 2020, begun drafting a standard for ground-level power supply electric roads. The standard is scheduled to be approved and published by November 14, 2022.

Companies

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.

ABB ABB Ltd. is a Swedish- Swiss multinational corporation headquartered in Zürich, Switzerland. The company was formed in 1988 when Sweden's Allmänna Svenska Elektriska Aktiebolaget (ASEA) and Switzerland's Brown, Boveri & Cie merged to create ...

announced in 2021 that it is involved in the construction of the first permanent electric road that powers private vehicles and commercial vehicles such as trucks and buses, using ground-level power supply technology.

References

{{Reflist Battery chargers Energy conversion Wireless energy transfer

Phones and other electronic devices

Electric vehicles

Companies

See also

References