The range extender is a necessary part between lead-acid batteries and lithium batteries. In the long run, it will eventually be eliminated, of course, the premise is that no new efficient range extender products are developed. The current situation is that new batteries have been delayed and have not been improved. Most of them are still stuck at the level of the 1990s.

1. The price of 7220 lead-acid battery is 900 yuan. The price of the more popular range extender sold on Taobao is 1480 yuan. The fuel consumption for 100 kilometers is at least 3 liters of oil. The range extender makes a noise of 80 decibels. If you run 5,000 kilometers a year, you need 150 liters of oil. You need 900 yuan in fuel. This range extender also damages the lead-acid battery. Now the lead-acid battery is generally shrinking. It can only be used for one year after being damaged by it. So the price comes out. Lead-acid battery price 900 + fuel cost 900 = 1800 yuan. Even if the battery is replaced with a new one, the price is 1,500 yuan. This cost is shocking. The price of 7235 lithium battery is 3,500 yuan. Although the price is relatively expensive, it is generally guaranteed for 2 years and can be used for three years. The average price is less than 1,200 yuan. Some people may say that my optimization algorithm is too rough. Then I will count the oil cost as 500 yuan. The lead-acid battery cost is 500 yuan. The price is 1,000 yuan. But everyone found that the price of the range extender of 1,480 yuan was not included. If the range extender is used for ten years and is damaged, it is still basically the same as the cost of lithium battery, that is, 1,148 yuan. The actual situation is that the lead-acid battery electric vehicle with range extender is heavy and noisy (80 decibels) while the 72v35ah lithium battery is very light, and the only noise is the noise of the electric motor.

2. Some people may say that the range extender is a generator, and it can achieve unlimited endurance with only oil. But I said that even if Sinopec gives you some oil, how far do you want to run? If you run 50 kilometers a day, what you should care about is your wallet. When the 7235 lithium battery is running at 60 km, you can run 60 kilometers in winter. This 60 kilometers is not the itinerary of the happy watch. It is the distance measured by the GPS. It is real and valid.

If there is any advantage of the range extender, it is that it can be suddenly charged in the middle of the journey, because the battery has been charged for a long time, it can be temporarily replaced.