This article was originally posted in Japanese

Sweden is developing on the public road "electric road" which can supply power while driving, introduction cost to road & existing car is low

13   /   04   /   2018

In order to reduce carbon dioxide emissions, electric vehicles are attracting attention, and it is said that there is a shift from gasoline engine cars to electric vehicles (EV) including Europe. One of the problems that hinders the spread of EV is battery performance. EV is still not practical due to the poor battery performance that the capacity is low and charging takes time. As a means to solve this EV battery problem, Sweden has introduced "electric road" embedded in the road to the public road for the first time in the world.

World's first electrified road for charging vehicles opens in Sweden | Environment | The Guardian
https://www.theguardian.com/environment/2018/apr/12/worlds-first-electrified-road-for-charging-vehicles-opens-in-sweden

For the Swedish electric road you can see by watching the following movie.

How world's first electrified road charges moving vehicles - YouTube


Sweden · A public road near Stockholm, the world's first electric road opened.

The two electrode lines embedded in the road will charge the battery of the car running on the road. The total length of the electric road is 2 kilometers, and the electrode lines are combined with 50 meters as one section.

When the track attached arm comes down and comes into contact with the two electrode lines, charging starts. Charged as long as you drive on this road. Of course you can leave the electric road if you pull up the arm
.

The state of charge of the battery can be managed for each one, and it is a mechanism that can be charged according to the charge amount.

With the electric road which can charge the battery, the problem of long distance movement which is a kind of trouble of EV is solved. Moreover, thanks to the electric road which can be charged while running, it is possible to drastically reduce the capacity of the battery mounted on the EV, and fuel efficiency (electricity cost) is likely to be improved by car weight reduction.

The Swedish government plans to reduce 70% of fossil fuel consumption by 2030, in order to break away from dependence on fossil fuels, the electric road system is expected to be an important weapon. We estimate that we can reduce 90% of carbon dioxide emissions by introducing an electric road system.

Furthermore, electric roads can be spread over existing roads, and the installation cost is 1 million euros (about 130 million yen) per kilometer.

Compared to the introduction of trams powered by electricity, it is relatively inexpensive with a price of 1 / 50th, and furthermore there is an advantage that the additional cost of remodeling a commercially available electric car and corresponding to an electric road is low And that.

An electric road of 2 km has already been opened.

Sweden not only introduces this electric road technology nationwide, but also exports to neighboring countries such as Germany.

There are approximately 500,000 kilometers of roads in Sweden, of which the highway is 20,000 kilometers and the distance between highways is 45 km at the maximum. Therefore, there is an opinion that it is enough to introduce an electric road to 20 thousand kilometers of a highway. In other words, in the section until reaching the highway, EV with a small battery capacity can handle it without causing electric shock.

According to Hans Saar, eRoadArlanda consortium representative who leads electric road projects, the current is basically 5 to 6 centimeters underground, although the electric road running the electrode on the road is concerned about rain and snow behavior It seems that it is flowing in meters, even if it flooded in water containing salinity assuming floods, the voltage on the road surface is about 1 V and stated that there is safety that can be put into practical use if it is a level that can walk with bare feet It is.

The Swedish government is continuing demonstration experiments on electric roads and aiming for practical application in the near future. It seems that discussion on future networking with Berlin, Germany, has also begun.

·bonus
Sweden is developing electric roads that feed electricity by direct contact with electrodes, but development of electric roads of non-contact power feeding type is also actively developed. The following Israel 's "ElectRoad"The project is developing a contactless power supply system system.

ElectRoad Technology - YouTube

New area: Succeeded wireless power supply while traveling from the world's first road to in-wheel motor ~ Form of power supply during new traveling ~
http://www.k.u-tokyo.ac.jp/info/entry/22_entry553/

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