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Who can save "electric dad"

Publish Date: 2022.09.23

  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 took 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 has been removed, and the bus body has also been made lighter, and the power consumption has been 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.

  

  Needless to say, the reason is that rebuilding the road is not only a physical task, but also a technical task to install a wireless charging device. 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 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.

  

  Source of information: 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 In the first half of this year, the automaker, which has withdrawn from the Chinese market, demonstrated its Dynamic Wireless Power Transfer (DWPT) technology to the public.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 on dedicated lanes and can also be charged synchronously.

  

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

  

  Recently, the Japanese company Denso also officially announced a cooperation to develop wireless charging road technology for electric vehicles in cooperation with Japanese construction companies. 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 department and is currently the world's second largest auto parts supplier after Bosch.

  

  As of press time, Denso's market value was 5.85 trillion yen, although it has increased compared to before, but given the sharp depreciation of the yen, it was 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

  

  According to the report, on the test road that is continuously covered with coils, small electric vehicles can travel "semi-permanently" at a speed of 15 kilometers per hour, and it is expected to be applied to unmanned buses operating 24 hours a day.

  

  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 coordination. 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.

  

  Like the above-mentioned surface wireless charging device, vehicle-road coordination is theoretically less expensive for the development of autonomous driving.

  

  The low-end models with advanced technology are not powerful, and the high-end prices are really high. Road building might really be that key.

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