According to media reports, on Wednesday, local time in the United States, Elon Musk, CEO of electric car manufacturer Tesla, replied to a fan tweet, claiming that the range of electric vehicles is too high to be meaningful.
From the content of the tweet alone, Musk did not say that the car's range is too high and meaningless, he said: "We could have built a Model S with a 600-mile range 12 months ago, but in my opinion, it will make the product worse overall, because 99.9% of the time you have to carry the unnecessary battery weight, which makes acceleration, handling and efficiency worse." Even the 640-kilometer endurance is enough for most people. Egg roll feels that Musk, as an electric vehicle practitioner and the CEO of the world's most influential pure electric vehicle company, do you think Musk is brainless when he speaks?
The old horse back pot that is used to the big mouth has become commonplace, and the headline party of some self-media is not a matter of one day or two days, and I personally think that as an entrepreneur, even if he has a big mouth, he is more reliable than what Trump said. To understand Musk's words is simple, you only need to understand the definition of energy density.
Regarding energy density, if the knowledge learned in the physics class of the nine-year compulsory education has not been returned to the teacher, you should understand a small popular science that the following paragraph of egg roll: energy density is the ratio of energy to mass, and the unit is kWh per kilogram. In fact, the energy density of the battery is very low, and the energy contained in 1 kilogram of gasoline is about 13 kWh of electricity. The full charge of the 1 kg lithium battery pack is about 0.138 kWh. It can be known that the energy density of gasoline is about 95 times that of lithium batteries. The same quality of gasoline, carrying energy is the same quality lithium battery 95 times, to keep up with the quality of fuel vehicles, your battery pack must not be too heavy, not to say ES6 weighs 2 tons, even the compact coupe Xiaopeng P7 is close to 2 tons, so the quality control of lithium batteries occupies a very large part in the design and research and development of the whole vehicle.
Although the efficiency of pure electric vehicles is 86%, which is much higher than the thermal efficiency of about 40% of gasoline vehicles, although the efficiency is counted, the more batteries are carried, the efficiency of pure electric vehicles will fall off a cliff.
Improve the endurance to strengthen cultivation, work the energy density of the battery, the formula of the ternary lithium battery is changed, the raw materials are changed, that is to say, your battery of the same size and weight can store more power. For example, the ratio of nickel, cobalt and manganese, from the earliest 5:2:3, to 6:2:2, and then to 8:1:1; for example, in the space ratio, the blade battery belongs to LFP, and after rearranging the space and process, the energy density is greatly improved; such as weight reduction, with a lightweight program, reduce the weight of the vehicle, thereby improving the endurance.
Externally, we look at it from another perspective, compared with the oil car, the tram is too long to replenish, so this is also a big source of anxiety. Is it not to reduce the charging time, so that you can greatly improve the user experience. Therefore, super fast charging has also been very hot in recent years, such as porsche Taycan as a leader, leading most car companies. 750V, 800V and even higher platform fast charging, in this year and next two years will also be a large number of production. The super fast charge, on the basis of increasing the voltage, but the current is not much improved, and the safety can also be improved a lot. Of course, super fast charging on the vehicle platform, but also a lot of high-voltage platform technology improvement.
If the vehicle itself can give you more than four or five hundred real endurance; or 5 minutes, 10 minutes can give you hundreds of kilometers of endurance, in fact, most people will no longer have charging troubles.
Buying a car with a range of 1,000 kilometers, it is likely to encounter a situation: only the first 50% of the electricity is used, the next 50% is rarely used, and the last 30% is never used. There is no battery in use, and you have to run on your back every day, which is a waste of resources!
Long endurance is the real demand, but not the only demand, long endurance + fast replenishment, is the real need to solve the anxiety of endurance.
Egg roll said: mileage anxiety may often be charging piles and charging speed anxiety of the back pot man, now many fuel vehicles are full of oil are walking about 600-800 kilometers, the user is really anxious, is the hours of charging time and charging piles of this basic facility coverage. Don't be misled.