Good morning, greeting you in the countryside of ticking spring morning  
 

At present, there are three schemes to supplement electric power for electric vehicles. One is the charging mode represented by the righteous Tesla, the power exchange mode represented by the shy Wei Lai, and the charging treasure mode represented by the ideal of strong new words.  
 

At present, the reason why the power exchange mode can not be opened is restricted by both subjective and objective aspects. Subjectively, the design of the power exchange station is too tall. I always think that it is necessary to have a site scale like a gas station and supply multiple electric vehicles for power exchange simultaneously. Such a site has been difficult to find in the already crowded large and super large cities. Objectively, different automobile manufacturers use different batteries, different specifications, different interfaces and different installation positions, so it is too difficult to replace them.  
 

Charging is relatively simple and easy. There are not too many charging interfaces. It is easy to set up and meet the charging of various brands and styles of cars. Centralized charging takes the patience of car owners. For this obvious problem, the remedy of charging school is to set up a household charging pile. However, it is conceivable that the popularization of household charging piles also has great problems, and it is difficult to cover more people. Therefore, the charging mode is easy at present, but it can not represent the future.  
 

The power bank model has a feeling of "being anxious to give new words". It is inconvenient to carry dozens of kilograms of power bank in the car every day, and the power bank can only meet the needs of cramming. Conventional charging still needs other solutions. Therefore, this model can not bear the heavy task of supplementing power for electric vehicles.  
 

In fact, as long as the problems of unified battery standards and operation site are solved, the power exchange mode has absolute advantages. Therefore, I believe that power exchange is the future. The power exchange school called "Wei Lai" doesn't know why it always says "rechargeable, replaceable and upgradeable" shyly? Maybe I didn't figure it out myself.  
 
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