Many people have some remarks about the Chinese government's choice of "pure electricity" technology route to develop new energy vehicles. The main reason is that the power battery must be equipped with a large number of charging piles to charge, and it is impossible to popularize many charging piles beside the road. So some experts actively advocated that the only best thing at the moment is the mode of changing power technology. The author has long studied the electric vehicle electric energy supplement mode. The research conclusions show that compared with the charging mode, the power-changing mode is more technically difficult, the investment scale is larger, the popularization is more difficult, and the input recycling is basically hopeless. The following is a failure mode analysis of the electric vehicle switching technology for reference by the concerned peers. Energy conservation and emission reduction are the common tasks facing all countries in the world. The direction of automobile development is electrification, which is the common understanding and understanding of the automotive industry in the world. However, the implementation is different, that is, there are major differences in the technical routes for developing new energy vehicles in different countries: a) At present, Europe encourages diesel power, and the choice of manufacturers such as Mercedes-Benz and Audi is a more energy-efficient diesel technology route; b) For many years, Japan has mainly advocated hybrid power, that is, actively promoted the hybrid technology route under the existing fueling infrastructure, and achieved proud results; c) The US civilian car market is greatly affected by Japan, and its basic trend is currently approaching Japan's hybrid car route; d) After years of exploration, the Chinese government finally decided to develop a pure electric vehicle as a technical route for new energy vehicles. In summary: a) The potential of mining fuel vehicles currently advocated by Europe and the United States to improve energy conservation and emission reduction. The first step of the current car power new energy vehicle route is the hybrid car; the second step fuel cell car; the third step pure electric car. b) After the Chinese government tried the hybrid technology, the final choice was the technical route of pure electric drive vehicles, that is, the adjustment of the original automobile technical route, the main force to promote pure electric (including plug-in hybrid) vehicles, and then Advance fuel cell vehicles. The Chinese government has proposed the basic reasons for the technical route of “Curving Overtakingâ€: First, the past road of automobile development is dominated by powers such as Europe, the United States and Japan, and China is a follower; Second, China is now a big automobile producing country and a big consumer country. As a follower, through 30 years of hard work, it has not become a car power, but it has long been technically backward; The third is to develop new energy vehicles today. If we continue to follow the development path set by developed countries, China will still be unable to become a car power. In other words, China has already established a "bottom" atmosphere for the development of new energy vehicles. Can the Chinese make a car development path to make China a car power? It is still too early to answer this question with certainty. However, in 2016, the production and sales of new energy vehicles in China has exceeded 500,000 units, making it the world's largest producer of new energy vehicles. It can be said that China's new energy automobile industry has entered a rapid development channel. The vehicle battery system is an energy storage component. The energy supply mode is basically divided into two categories: one is the power supply on the vehicle, the hybrid mode belongs to the power generation on the vehicle, the fuel cell is also the power supply on the vehicle; the second is to rely on the ground power grid. Car battery power supply. There are two ways in which the grid can supply battery power: a) Power change mode. Charge the battery on the ground first, then change the battery to the car, then change the "empty" battery to charge; b) Direct charging mode. The car battery is connected to the power system of the grid through a charging gun (charger) and then charged. For the battery, regardless of the power-change mode and charging the car battery directly through the charging gun, it is an electric energy supplement. Different from the charging mode, the power-changing mode can realize the factory-type charging production, and can charge the battery in a large-scale and batch manner. Charging is better than processing in production, the battery to be charged is better than the material to be processed, and the charged battery is like the factory product. In the battery-factory charging mode, the power replenishment time is borne by the electric energy replenishing factory, and the time for directly charging the car battery is borne by the owner. Battery charging is an electrochemical process, and refueling is a physical process. According to common sense, the speed of the electrochemical reaction can be much faster than the physical refueling speed if it is purely for the speed of electric energy replenishment. However, the electrochemical reaction rate is too fast, and the cost of safety measures is also quite high. So in fact, the battery charging time is much longer than the refueling time, which is based on the safety of battery power supplement. In layman's terms, battery power supplements are technically more complex than physical refueling.
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