What should I do if I only drive a little over 100 kilometers after buying a pure electric car with a range of 400 kilometers?

You can complain to the Consumer Association.

The current endurance test standards for electric vehicles are relatively loose, and the daily driving environment generally consumes more power than the test environment.

Another reason is that when supervision is not strict, more brands will use the more relaxed testing standards within the company as promotional slogans, so the gap between the two numbers will be even greater. The sooner this issue is known, the better, because new energy vehicles have begun to phase out traditional pure fuel vehicles. Therefore, major car companies are adjusting their product lines as soon as possible. For example, Volvo will no longer sell pure fuel vehicles from 2019, only hybrid and pure electric vehicles. The most important indicator of electric vehicles is battery life, especially in big cities with little land and many people, charging parking spaces are scarce.

But almost none of the pure electric vehicles currently on sale can actually drive beyond the nominal value. Why is this?

Because the cars sold in China and Europe are calculated according to the NEDC test method. This test runs a total of 11 kilometers in one time, which takes about 20 minutes. Pure electric cars often choose to only This is an urban event because the maximum speed in this event is only 50 km/h. For a car that is traveling at a constant speed and does not stop, how far it can travel with a full charge is mainly determined by air resistance and road friction. You may not think that there are only these two factors, but there are smaller components in each factor. factor. For example, the relationship between air resistance and vehicle speed. The original model was very complicated, but engineers have simplified it and simplified it again. For speeds exceeding 3,000 kilometers per hour, the increase in air resistance increases according to the cube of the speed. If it is below this speed, it increases squarely. Of course we hope that the air resistance will remain constant, but this is impossible. For a car, after the speed increases from 50 km/h to 120 km/h, the energy consumed by air resistance during this distance is 6 times the original. So based on this alone, you will know why those manufacturers test according to NEDC specifications and only test projects in urban areas and not on highways. Because running at a high-speed speed of 120 kilometers/hour will greatly reduce the test results of battery life. But air resistance is also related to the density of the air itself. For example, resistance does not exist when we are in a vacuum. This is why those space probes can still maintain a high speed of 170,000 kilometers per hour after flying out of the solar system even though the fuel cells are exhausted. reason for operation.