High temperature power cuts, twelfth lunar month and winter, electric vehicles have become "electric fathers".

The packaged camera lidar can't be hit, and the reduced cruising range tells you that you can't play.At a certain beautiful moment, people are thrown on the side of the road. Is it the strange car or the strange road?

The car has its difficulties, so Lu takes half the responsibility.For example, in 2013, South Korea launched a wireless charging bus system for the first time in Gumi City.

In the fixed charging area (below), the cable buried underground will generate electromagnetic induction with the coupling coil at the bottom of the bus to charge the bus.The jargon for this technology is "magnetically coupled resonance."

Image source: People's Daily

Not to mention the time to go to the charging station to replenish energy, some of the battery weight is removed, and the bus body is lighter, and the power consumption is improved.

But until now, people are still unilaterally pursuing long-range electric vehicles, and battery life has always been one of the main selling points of electric vehicles.

It goes without saying that rebuilding roads is not only a physical task, but laying out wireless charging devices is also a technical task.What is the best size for the coil to be placed on the bottom of the car?How to improve transmission efficiency?How to avoid electromagnetic interference?

Taking another technical route of solar photovoltaic highway as an example, there are still many problems such as road durability, power supply efficiency and energy consumption in large-scale construction.Also, building roads is an economical issue.

Information source: China Intellectual Property News

Even so, OEMs, wireless charging system providers, and construction companies are all targeting road construction.

At the end of last year, Stellantis opened a wireless charging test road of about 1 km in Italy.In the first half of this year, the automaker, which has withdrawn from the Chinese market, demonstrated its Dynamic Wireless Power Transfer (DWPT) technology to the public.

As the name suggests, "dynamic" refers to the fact that electric vehicles are driven in dedicated lanes and can also be charged simultaneously.

What's more interesting is that the electric energy transmitted from the ground does not need to go through the power battery, and can directly drive the motor through the receiver.In this way, the battery power can be used as "reserve food" for later use.

The concave part is used to hold the coil and transmit power through the receiver

And recently, the Japanese company Denso (Denso) also officially announced a cooperation with Japanese construction companies to develop wireless charging road technology for electric vehicles.The two companies have already started testing in Tokyo and plan to commercialize it in 2025.

Denso was born out of Toyota's electrical parts division and is currently the world's second largest auto parts supplier after Bosch.

As of press time, Denso's market value is 5.85 trillion yen, although it has increased from before, but given the sharp depreciation of the yen, it is converted into US dollars of about 40.819 billion US dollars.

Toyota's electrification transformation is relatively slow, but its Tier 1 giant is moving fast.

Image source: Nihon Keizai Shimbun

Combined with the report, small electric vehicles can travel "semi-permanently" at a speed of 15 kilometers per hour on a test road that is continuously covered with coils.

In fact, building roads can not only solve the problem of "electric dads", but also transfer the cost of making cars "smarter" to a certain extent.

There have always been two development routes for autonomous driving, bicycle intelligence and vehicle-road synergy.The former is to stack chips and computing power on the car, and the latter is to take on a considerable part of the center of gravity on the road side, which is the saying “get smarter” by giving way.

Similar to the aforementioned wireless charging devices on the ground, vehicle-road coordination is theoretically less expensive for the development of autonomous driving.

Low-end models with advanced technology are uninspiring, and high-end prices are really high.Road building might really be that key.