Why develop electric vehicles?

First, the basic reasons for the elimination of fuel vehicles

The fuel car has been developed for more than 130 years, and the car may have appeared for many years. People always imagine that cars are the best mobile homes, mobile offices, and some also envision that cars must become warm homes. The car designer is constantly moving forward and working hard. The home is still home, the office is an office. At present, the car is still a car. It is impossible to be a home or an office.

The quality of fuel vehicles is getting better and better, and the functions are more and more. The occupants can watch TV and make phone calls in the car. But why is fuel car eliminated? Basic reasons:

1 Gasoline (diesel) is the result of natural movement, and its production mechanism does not currently have an authoritative statement, but its distribution is uneven, and some places have, and some places do not.

2 And people are using cars more and more frequently, especially when there are more and more people in China, and China does not have much oil.

3 The engine efficiency is not high, the engine fuel produces exhaust gas, which is polluted to the environment (air) and harmful to the human body.

Naturally, there is a law that the object must be reversed. The carriage and the oxcart have eliminated the rickshaw, and the fuel truck has eliminated the carriage and the oxcart. That is to say, the fuel car has served the world for more than 130 years, and it has basically reached the top. The elimination of fuel vehicles is a natural law.

Second, why should we develop electric vehicles?

The electric car was invented 10 years earlier than the fuel car, but it was always better than the fuel car. Today, the basic reason for developing electric vehicles is again raised.

1 The fuel car has been unable to meet the development of social civilization, and its negative impact on the environment (air) has reached an intolerable level;

2 The development of the fuel supply side has not kept up with the demand for cars;

3 The development of power batteries for automobiles has undergone major breakthroughs, and has continued to improve, and has been able to meet some of the uses of automobiles, such as buses, taxis, urban freight cars, and A-class passenger cars.

4 It is a common sense that electric vehicles do not pollute the environment (air) during use;

5 The source of electricity is relatively wide, and its use is relatively wide. The use of electricity in automobiles is also an inevitable requirement for the development of social civilization.

Third, pure electric vehicles, the people are accepted, but far from the requirements of consumption

China's new energy vehicles, in 2016, the scale is 500,000, in 2017, nearly 800,000, 80% are pure electric vehicles; pure electric buses have been accepted by bus operators 100%, pure electric city trucks, A00 level Passenger cars have been generally accepted. However, to fully replace the fuel truck, its strength is still far worse. For example, the fuel car is already the "old", the electric car is young, and the current strength is still on the old side, but the expectation is already on the young side.

First review the concept of "anxiety". Anxiety means an emotional or psychological internal conflict that triggers irrational anxiety or fear. Anxiety may arise in specific situations; it may also be inertia or a common and common feeling. Popularly speaking, anxiety is a feeling of anxiety or fear. The “anxiety” of users on pure electric vehicles stems from emotional or psychological internal conflicts. Pure electric vehicles are currently the four major shortcomings relative to fuel vehicles, which are the four major anxieties that everyone said.

1 mileage anxiety

Compared with fuel vehicles, pure electric vehicles have a shorter cruising range. This is because the specific energy of the power battery is much lower than that of the fuel. Therefore, it is not realized that a pure electric vehicle has a cruising range longer than a fuel vehicle. After hard work, it is possible to eliminate the mileage anxiety of a pure electric vehicle. For example, the office worker's pure electric passenger car has a battery life of 300 kilometers, the pure electric bus has a battery life of 280 kilometers, the city's freight electric vehicle has a battery life of 240 kilometers, and the taxi electric car has 400 kilometers. After the battery manufacturer and the OEM work together, it can Be Realized, some models have been realized.

2 safety anxiety:

At present, the power battery is a dangerous product, and the level is relatively low, which is lower than the gasoline dangerous level. The safety measures that the fuel vehicle can use can also be used for pure electric vehicles. Lithium batteries are prone to fire (explosion) in the event of a car accident, as is fuel. At present, different fuel tank safety measures have been put in place, and power battery protection measures have not become common sense. The application of anti-collision technology, which is currently being advanced, is becoming more mature.

There are also legends that there are many high-voltage lines in pure electric vehicles, which have radiation hazards. I want to tell you that there are high-voltage lines in trolleys, trams, subways, light rails and other transportation tools. The high voltage mentioned here is relative to 12V, 24V, pure electric motor, generally 380V (AC), the motor of the production company is 380V (AC). China's trolleybus has a DC rated voltage of 600V, and the history of trolleybus use has been more than 100 years. Sensational, pure electric cars have "radiation" news, do you still need to blame?

3 charging convenience anxiety

Pure electric vehicles have a long charging time and are also relative to fuel vehicles. The fuel car is refueling and it has been completed for 5 minutes. The national standard has already stipulated that pure electric vehicles should be charged within 30 minutes and 80%. Some BMS manufacturers have proposed to achieve charging to 90%, only need 30 minutes of recharge, basically can eliminate the user's "pure electric vehicle charging time is long" anxiety.

The lack of public charging facilities is temporary, which is in line with the fact that gas stations have not been popularized in the past. It is to be said that the technology of the layout of the public charging facility is easier and less demanding than the layout of the gas station. Household pure electric vehicles can be charged by household portable chargers. It is convenient to charge at night, the cost is lower, and the development is very fast. It is a basic principle with mobile phone chargers.

4 high-cost anxiety

At present, the state has subsidies for the purchase of electric vehicles. Some people worry that after the subsidy, the price of pure electric vehicles will rise sharply; if the battery is damaged, the lithium battery pack must be replaced as a whole, and the cost is high; the used cars of pure electric vehicles are almost no one wants. This is a static view of the development of electric vehicles.

At present, the cost of electric vehicles is high, mainly at the cost of power batteries. The initial cost of power is 5.8 Yuan / WH, and the cost has been falling, currently, 1.5 Yuan / WH, the national planning target is 0.6 Yuan / WH. After the power battery is decommissioned, it can be used in other fields, and the use (maintenance) cost of the electric vehicle is much lower than that of the fuel vehicle. Without the above knowledge, there is no high-cost anxiety.

Fourth, electric vehicles are the best carrier for automatic driving

1 Battery technology is developing slowly and the energy ratio is relatively low. The development of electric vehicles is at the bottleneck in the power battery's specific energy boost.

2 The working principle of the motor is direct circular motion. It cannot cooperate with the transmission. The maximum torque can be generated at the starting and low-speed stages, and the power acceleration is strong. The disadvantage is that the high-speed stage is very expensive, and the efficiency is not as good as that of the high-speed operation.

However, the structure of an electric car is much simpler than that of a conventional car. To achieve automatic driving, cars must be motorized. The car has achieved automatic driving, and convenience anxiety is basically gone, and its safety is higher. No matter what kind of hybrid power, it is the product in the electrification process of the fuel car, so it is impossible to make the hybrid car more advanced and more advanced than the pure electric car. However, there is a process for comprehensive electrification. The development of hybrid power is of certain positive significance. The reason is that some models are purely electric and the technology is not mature.

In a word, hybrid cars are transitional products and ultimately pure electric vehicles.

The page contains the contents of the machine translation.