From：CTECHI GROUP Limited Release time：2018-12-04
Overview：With the rapid development of new energy automobiles, the charging rate is getting faster and faster. At present, the fast charging level can charge 80% of the battery in 30 minutes. But another way of making up electricity is rising, that is, the mode of changing electricity.
With the rapid development of new energy automobiles, the charging rate is getting faster and faster. At present, the fast charging level can charge 80% of the battery in 30 minutes. But another way of making up electricity is rising, that is, the mode of changing electricity.
In the final analysis, whether it is charging or changing power, it is actually a way to supplement electricity. In the past many years of development, slow charging and long time have been restricting the promotion and application of new energy vehicles, so whether car companies or battery companies are also pursuing how to replenish energy for batteries more quickly. But recently, many car companies believe that changing power is the best way to solve the problem.
Charging and switching are two completely different routes, while fast charging is one of the charging modes. Fast charging is also a concept relative to slow charging. Fast charging uses high-power DC charging, which can charge 80% of the battery in 30 minutes. Slow charging is AC charging, and the current charging speed is about 6-8 hours to fill the battery.
Lithium titanate batteries, which are mainly promoted by domestic battery companies, can charge quickly for ten minutes, but the energy density of these batteries is too low to be widely used. While other battery companies continue to improve the energy density of batteries, they are also increasing the rate of fast charging.
Although there are some electric vehicles with a range of 400 kilometers at present, if they want to run at high speed frequently, the range will be greatly reduced, which is still a big gap with the fuel vehicles. More importantly, the highest cost of electric vehicles is the battery sector. If the state's subsidy policy for new energy vehicles is completely withdrawn by 2020, high prices will hardly make consumers willing to pay again. With more batteries, higher prices, fewer batteries and not far away, this seems to be a dead proposition in charging mode.
The Tortuous Way of Electricity Exchange Mode
At the beginning of the popularization and application of electric vehicles, no one thought that electric vehicles would be replaced by electricity, and electric vehicles would develop slowly in the way of charging.
In addition to the high cost of power station construction, battery standardization is also very important for power exchange mode. If the appearance and quality of batteries are different from each other, there will be no room for ordinary consumers to survive.
The advantages of power exchange mode are also obvious. Firstly, the power exchange mode can realize the separation of vehicle and electricity value. Users do not have to pay huge battery charges at one time when they buy a car. At the consumption level, they can resolve a series of pain points in the whole life cycle of purchasing, using and withdrawing pure electric vehicle users. And the efficiency of the power change mode is very high. After the vehicle enters the power change station, it can complete the power change in about 3 minutes, and the speed is no less than refueling the fuel truck.
In a word, the fast charging mode and the power exchange mode have their own advantages and disadvantages. From the current situation, the two modes are inseparable. It is not yet known whether the switching mode can expand rapidly and whether fast charging can further expand its market share. Which of the current two ways of power supply can be the ultimate solution, I am afraid only time can give the answer.
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