In the development of new energy vehicles, charging and swapping are key components that cannot be bypassed. On January 21st, at the 2018 China Electric Vehicle Centenary Forum held in Diaoyutai State Guesthouse, Miao Wei, Minister of the Ministry of Industry and Information Technology of China stated that as of the end of 2017, a total of 214,000 public charging piles had been built nationwide, an increase of 51% year-on-year. The number of possessions ranks first in the world, and the installation rate of new users' private charging piles exceeds 80%.
“We are talking about driving more intelligently and hotter. I think it's almost like the Red Sea, but smart charging is still a blue ocean.” Ouyang Minggao, executive vice chairman of China’s Electric Vehicles 100, proposed charging intelligence at the forum. Transformation path. He believes that intelligent charging will trigger an energy revolution.
However, for now, thermal power generation is still the main source of China's electricity. How to make new energy vehicles a truly clean energy travel mode, Liu Chongxiao, vice president of the clean energy company GCL Group Holdings Co., Ltd., proposed solar photovoltaic power generation in the forum, providing another possibility for electric vehicles to realize clean energy in a real sense. .
“There are not many industries in the forefront of the world, but photovoltaic power generation is one of them. With the introduction of power system reform policies and distributed energy trading policies, and the construction of photovoltaic energy, electricity sales, and decommissioned battery energy storage systems, the new The new green charging ecology of the energy-light vehicle 'light-storage-charging integration' is already in place, and it can make new energy vehicles really use clean energy, said Liu Chongxi.
The three technical lines have long-term complementarity?
In China, the charging and changing modes have experienced the development of five generations of technology for nearly 20 years, and as electric vehicles have gradually become the development trend in the future, the three charging technologies: slow charge, quick change, and fast charge The path of disputes has also become increasingly fierce since 2012.
In fact, the mode of power exchange has seen a large-scale application in our country. “After the Beijing Olympics, the Shanghai World Expo, and the Guangzhou Asian Games, the power exchange model has been rapidly promoted. For example, Beijing has basically decided to change 70,000 taxis to electric vehicles, and all of them are replaceable batteries.” On the 21st, Academician Sun Fengchun of the Chinese Academy of Engineering Indicated.
At the same time, the fast charging mode is rapidly entering the field of electric vehicles. Liu Qiang, chief technology officer of ABB Group in China, said in an interview with 21st Century Business Herald reporter that ABB Group has distributed more than 6,000 fast-charged pilots worldwide, and in the European Netherlands, Estonia and other places have realized the charging grid layout. In the next one to two years, it will be possible to see the emergence of an electric vehicle that satisfies the 300-kilometre distance of 15 minutes.
"I personally believe that the three technical lines of slow charging, changing electricity, and fast charging will complement each other for a long time and coexist. They will continue to exist within the scope of their respective markets or within the scope of their application," Sun Fengchun told reporters.
However, in addition to this, the recent rapid rise in energy storage for smart grids has opened up yet another channel for innovation in the charging model.
The principle of the smart car grid is actually peaking and filling the valley. According to the rules of electricity consumption of different users, the electricity consumption time of various users can be arranged and organized reasonably and systematically. To reduce load peaks and fill the load trough. Reducing the peak-to-valley difference in grid load will make power generation and electricity use more balanced.
According to Jiang Bing, chairman of the State Grid Electric Vehicle Service Co., Ltd., the charging of electric vehicles is intermittent, flexible and controllable, which is naturally matched with new energy sources and distributed energy sources. Therefore, in the future energy system, electric vehicles may become an important basic unit.
According to statistics, the total mileage of most private cars will not exceed 100,000 kilometers. Considering various factors, the average number of charging cycles of private cars will not exceed 500 times on average. However, the current vehicle power battery charge and discharge has been able to Achieved 2,000 times, Ningde era has begun research and development of 5,000 batteries.
In addition, according to Jiang Bing, the use of passenger cars in China is only 5%. “If this car is an electric car, and then combined with a charging pile, this car has a large amount of extra charge capacity every day, and there are plenty of extra charging time. By 2030, if the electric vehicle population reaches 100 million, Then the power of the onboard battery will reach 1 billion kilowatts, equivalent to 50 Three Gorges power stations."
Then, in the future, a system consisting of electric vehicles and phase-out batteries will far exceed the power generated by all connected power supplies of the grid.
The system of vehicle-mounted power batteries will be like a giant sponge, absorbing all excess power. "What we are doing now is to use smart car networking platforms and the Internet of Energy to make this system's electric vehicles correctly charge and use the correct amount of electricity at the right time and place," said Jiang Bing.
For the power grid, the use of an electric vehicle with smart grid energy storage and fast charging will not only bring about environmental improvement, but also bring about great changes in its operating efficiency, which can further reduce the cost of power generation.
However, Liu Qiang believes that the concept of the automotive power grid requires the use of electric vehicles to reach a certain scale, and that after the infrastructure is better equipped, it can be truly implemented. "The current charging pile is one-way, but I think after three to five years, this topic will surely really come up."
Photovoltaic power generation to achieve clean energy
New energy vehicles have become the trend of the future and the zero emission of the use process has become a consensus. However, whether electric vehicles are equivalent to clean energy is still in doubt in China.
At present, China still relies on coal to generate electricity. There are also emissions from the production process of electric vehicle products. Take the A-class passenger car as an example. According to China’s current data on power generation and refining, carbon dioxide emissions from electric vehicles still exist, which is about gasoline cars. One-half.
To this end, Wang Binggang, director of the Technical Committee of the Technology Innovation Strategic Alliance of the Electric Vehicle Industry, put forward the concept of establishing a full life cycle analysis within the industry at the 2018 China Electric Vehicles Centennial Conference. "We will establish evaluation methods and standards by working groups that are widely involved in the energy, power, materials, and automotive industries. We will then conduct a comprehensive analysis of a large number of authoritative data and review and publish the calculated carbon emission factors."
At the same time, China's solar photovoltaic industry is also in rapid development in recent years. In the past 10 years, China has built a large number of large-scale photovoltaic power stations in the northwest region, occupying 70% of the global solar photovoltaic production market. Photovoltaic power generation is providing another possibility for electric vehicles to realize truly clean energy.
“Our understanding of new energy vehicles is a kind of mobile, distributed energy storage facilities and consumer units. We consider electric vehicles as a mobile power supply and facilities. It is one of the five pillar industries of the energy Internet. Liu Chongxi told reporters.
According to statistics, as of the end of 2017, the installed capacity of photovoltaic power generation in China has reached 137GW, of which the installed capacity of large-scale power plants is 105GW and the installed capacity of distributed photovoltaic power plants is 31GW. Calculated by a car running 100 kilometers a day and using 15 kilowatts of electricity, a distributed photovoltaic power station can support more than 5.8 million vehicles. Large-scale power plants and distributed additions can support more than 20 million electric vehicles.
"The new green charging ecology of light-storage-charging integration will emerge. We believe that it is entirely possible to realize industrialization. Distributed photovoltaic power plants can fully support the demand for clean energy for new energy vehicles," Liu Chongxi finally said.
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