Do not plug in the convenience? Why not popular when the car wireless charging

Wireless charging is different from traditional charging in terms of wired and offline wires, and there is no “binding” of charging wires. For the owner, it means that it can be stopped without plugging and unplugging the charging plug; for all plug-in new energy vehicles , it means charging is not limited by plug specifications. All of this seems to be a win-win and convenient feeling. However, the fact is that the fact that you are using a wirelessly chargeable Samsung mobile phone will find the same line of charge and the same applies to cars. Why? And look down.

Do not plug in the convenience? Why not popular when the car wireless charging

Speaking of wireless charging, it reminds me of the small details of the previous Lumia 920 (Microsoft's wireless charging smart phone): When charging with a wireless coil base, all need to be careful to properly charge the phone in order to charge normally, if you offset a little, you cannot Charging, let alone answering a phone call or replying to a text message, has to be renewed.

Car wireless charging

Wireless charging is not very avant-garde technology. The history of development has been a hundred years. It is said that the mainstream of wireless charging is to use the principle of electromagnetic induction that our physics teacher once said. Now some smartphones and electric toothbrushes can achieve wireless charging. The R&D time of Hyundai Motor's wireless charging can be traced back to 2009 Nissan's R&D non-contact charging system.

Why is wireless charging not popular? Or will it not be universal? For this issue, they are full of confidence in car wireless charging technology and are dedicated to:

Dr. Anthony Thompson, vice president of Qualcomm , said in an interview in 2015 that within a decade, automotive wireless charging technology will become the mainstream of the market.

BYD : In 2005, he applied for a non-contact induction charger patent and applied it to electric buses.

Japan's Toyohashi University of Technology : Research and development of a charging device that can penetrate 20cm thick concrete blocks to transmit electricity.

Qualcomm wireless charging R & D

To tell you the truth, even the conventional charging piles have not yet been widely used. It is really a bit of a sneaky problem here that everyone is skeptical about why wireless charging is not universal. But people, the brain hole can only activate the innovation factor. For the mobile electric car with strong attributes, do you suspect that the electric car must be paired with the charging plug? How far is the idea of ​​parking or charging? Will there be a picture where the electric car can walk while charging?

Car wireless charging

Do you walk around while charging reality?

In 2013, the world’s first wireless charging bus lane was built in Korea. It was opened in Kameido City to n-dong, where cables were deployed under a road length of about 12 km. The “magnetic resonance” technology was used to realize charging. An electromagnetic field with a frequency of 20 kHz is formed on the road surface. The bus is equipped with a voltage stabilizer and an inverter compatible with it to realize the generation of electric energy.

Charging while walking

The idea is good, however, even regular concrete roads in China must be repaired and repaired, not to mention the high-cost, high-input induction charging device.

But don't forget! It may be ironic that Chinese urban traffic congestion may bring new life to wireless charging technology. However, this is actually the case. Qualcomm’s vision for semi-dynamic charging is to set up inductive charging at intersections, waiting areas, roadside stops, and bus stops at intersections. This is exactly how cars will stay in these specific areas. For short-term charging. This idea is so cool! I think the "relay charging system" is very appropriate.

Well, to say perfect things, say cruel facts. Compared to building a charging pile and improving battery performance, the research and development of wireless charging is not urgent, and electric vehicles or plug-in hybrid models have not become mainstream in the market, and wireless charging has not been widespread in the automotive field. Even if you make a fuss afterwards, you still need to face the following difficulties:

| Charging standards are not uniform | charging efficiency is slightly lower than wired charging | Parking demanding | exist Radiation

As a result, Tesla, an electric vehicle giant, seems to have little early exposure to wireless charging. He is proud of efficient supercharging stations and destination charging stations around the world. CEO Musk believes that wireless charging is "inefficient and low-energy. The charging method.

Is there no standard limit for wireless charging?

After jumping out of the charging slot specification, you will also encounter different wireless charging standards. Compared to the tangible differences in the charging slot, the wireless charging standard is invisible. It is likely that you have entered the parking space. Only found incompatible can not charge.

Different standards or forms of charging plug

In fact, the existing wireless charging standards are also numerous, and there is no uniform standard, which is bound to affect the application of the automotive field. The use of automobiles for a long period of time is quite long. Therefore, unlike the consumer electronics products, automobiles can be replaced by rapid update iterations to replace the wireless charging standard. This is the so-called ship turnaround. There is no stable and uniform wireless charging standard. The car companies are not willing to rush to go to large areas to apply their own models.

Qualcomm can be said to be the most active in the automotive wireless charging standard. Prior to joining forces with South Korea's Samsung, Powermat and other companies to create a wireless charging alliance, it is imperative to establish wireless charging technology standards including portable electronic products and electric vehicles. Dialogue mechanism. In practical applications, Qualcomm uses its own research and development of Qualcomm Halo electric vehicle wireless charging (WEVC) technology in the electric formula championships for the modified BMW i8 (Official Race Safety Vehicle) and BMW i3 (Official Race Medical Vehicle and Guided Vehicle. ) Charge it.

▍ Is parking an egg for automatic parking?

At present, many newly-released models with high-capacity versions will have an automatic parking function. Maybe it is an egg that is buried for future wireless charging? Since the mainstream wireless charging technology is electromagnetic induction type and magnetic resonance type, and the transmitting end and the receiving end need to overlap with a large area, there is a requirement for parking alignment. In other words, the car must be parked in the correct position. To achieve charging.

Auto parking

In real life, many drivers will have “out of bounds” when parking in a designated parking space, not to mention centimeter-level alignment. If people park, it is difficult to do so "precision" times.

To this end, in 2014, Toyota developed a parking assist system specifically for parking wireless charging. Drivers can use the central control screen to identify the relative position of the car and the transmitting coil and improve the accuracy of pairing. Of course, it seems that this is still not enough smart, 100% automatic parking can be a good solution to the problem of wireless charging pairing.

There are also these factors that together inhibit the development of

The huge inductive transmitter coil is indeed very easy to worry about radiation problems. The industry generally believes that the existence of radiation risk is also one of the reasons why wireless charging cannot be popularized. In addition, laying costs and thresholds are also a major problem. Many automotive wireless charging solutions have one thing in common: they need to lay cables on the ground (most of them are dark lines), and then dug a hole in the ground for laying sensors. Coil. Compared to the simple wired household 220V cable can now be used for charging, it is clear that your property company is not willing to do so much for you, so the wireless charging parking spaces should be preset from the building when the building.

Car wireless charging

Editing comments: If wireless charging can guarantee future charging while walking, then the battery size of the car can be designed to be smaller, which greatly increases the interior space of the car. This is another of the benefits. The research and development of wireless charging is designed to make it easier and easier for the owner to charge, but it is limited by the existing technology and becomes less convenient. Therefore, there is no better solution for car wireless charging to overcome the existing problems. , is still a tasteless existence, simply not popular.

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