According to the Detroit News Network in the United States, one of the reasons why electric and plug-in hybrid vehicles cannot be popularized quickly is that the charging process is more complicated and cumbersome, and the supporting infrastructure construction cannot keep up. Taking Chevrolet Volanda and Nissan as examples, the driver must plug in the power to charge his car, which is really not convenient for a huge car.
Many companies are working on new methods to break free of plug-in charging and charge vehicles with wireless charging pads fixed on the ground. The coil installed on the bottom of the car is connected to the charger when the car is parked on the wireless charging pad. Plug the wireless charging pad to charge, but the car does not need to plug. Automakers and suppliers are expected to sell the wireless charging pad around 2015.
Phil Gott, an analyst specializing in power system research and development at IHS AutomoTIve, said that based on feedback from some Chevrolet Volda and Nissan Windmill owners, many people complained that electric vehicle charging wires are difficult to clean and easy to entangle. Together. The development of wireless chargers can save consumers these worries.
Automakers are counting on such vehicles to respond to regulatory pressures to increase mileage and reduce emissions. The Deloitte Consulting (Deloitte LLP) pointed out in a 2011 survey that electric and plug-in vehicles have not yet been accepted by 96% of consumers.
Dele pointed out that the price and the mileage of cars can dispel the idea of ​​buying electric cars. Coupled with the general charging time of 3-8 hours, people will not even consider buying plug-in cars. Tesla Motors (Tesla Motors), an American car company specializing in the manufacture of electric vehicles, released its first new electric vehicle independently developed by the company last week. The company has said that it will release a new super charging network. , Can make its car fully charged in less than an hour.
At present, a number of car companies and related companies have begun the research and development of electric vehicle wireless charging equipment, including Nissan, Audi, Toyota, Mitsubishi and other car manufacturers, as well as Delphi (Delphi AutomoTIve), Qualcomm (Qualcomm), Evatran, cloth Auto parts manufacturers such as Brose Fahrzeugteile GmbH & Co.
It is worth mentioning that in 2011, the largest car manufacturer in the United States and the Chevrolet Volanda manufacturer, General Motors, invested $ 5 million in a private company called Powermat to develop wireless charging equipment. GM said that this technology is currently only suitable for charging smartphones and other in-vehicle devices.
It is reported that there are currently only two ways to achieve "wireless" charging. One is electromagnetic induction, similar to the principle of electric toothbrush homing; the other is to use magnetic resonance.
Randy Sumner, director of Delphi ’s hybrid electric vehicle marketing and technology department, said that Delphi ’s wireless charging system uses technology developed by WiTricity. The technology uses a magnetic field to transmit power, and its power output oscillation circuit is installed under the garage floor or under the parking space. The gap on the wireless charging pad can be up to 10 feet (25 cm) depending on the gap of the car.
Sumner said that the charging system uses technology developed by the Massachusetts Institute of Technology and can be charged with 3000 watts of charging power within 4 hours. The two sets of coils are tuned to resonate at the same frequency, thereby connecting power transmission. Audi, Toyota and Mitsubishi are also working on cooperation with WiFricity.
Sumner claims that magnetic resonance can allow a greater positional deviation than electromagnetic induction. Electromagnetic induction charging requires more precise alignment during charging, while magnetic resonance charging allows lateral deviation, or a maximum position deviation of 10 centimeters to the left and right.
Sumner also said that the charging system is likely to be sold for more than $ 2,000, which is at least twice the price of today's charging stations. Today's charging stations are also less efficient. About 10% of the electrical energy is lost during transmission. Our goal is to reduce the loss to 5%.
Some people will question that this charging pad is flat and warm, how to solve the problem of domestic cats sleeping on it? How can users keep metal away from it? A group of experts from suppliers and car manufacturers solved such problems after a year of research and developed a charging standard suitable for the model used.
Another problem is the market. According to Autodata Corp data, last year, GM sold 7,671 plug-in hybrid Volandas, and Nissan sold 9,674 pure electric listening models. In May, Volanda and Lianfeng delivered a total of 9670 vehicles. Nissan sold 510 vehicles in May, a 55% decrease compared to the same period last year.
The pre-tax starting prices for Volanda and Lingfeng are $ 39145 and $ 35200 respectively. Electric gasoline cars are also expensive. Toyota said in May that its electric RAV4 sports car, which will be sold in California, will cost $ 49,800, more than twice the price of the gasoline-powered RAV4. Tesla provides batteries and engines for the electric RAV4.
Pike Research, based in Boulder, Colorado, predicts that by 2017, sales of plug-in and pure electric vehicles will reach 359,000. Industry research company AutoPacific from Tustin, California, predicts that by 2017, plug-in and electric vehicle sales will total 320,000.
The market for rechargeable cars is constantly expanding. Last year Toyota introduced a plug-in model of its Prius hybrid. Ford started selling the electric version of the Fox this year and announced that it will launch a plug-in version of the Fusion next year.
Rodney O'Neal, CEO of Delphi, said consumer demand has not yet caught up with technological developments. He said that many things are possible. The question is, can you effectively save costs? Does the world care about what you do? Can you benefit and create value for your shareholders?
Public wireless chargers will alleviate people ’s concerns about electric vehicles, especially whether they can guarantee the smooth return home when there is electricity.
According to a report by Bloomberg New Energy Finance on April 27, the number of public charging stations worldwide will triple from 28479 in 2011 to 98503. The vast majority of these new charging stations will be distributed in China and Europe.
Andrew Gilbert, executive vice president of Qualcomm, said a test of wireless charging pads is being conducted in London to address how to embed it in city streets and parking lots. The company hopes to license the technology to car manufacturers and wireless charging pad manufacturers.
Gibert said that Qualcomm is currently equipped with wireless chargers for 50 electric vehicles. He also said that plug-in chargers are not a bad way. We just want to seize this opportunity to improve the user experience and make users more satisfied. He added that the power supply is actually the same, but the transmission method is different.
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