Wen Civil Engineering Yesterday, Weilai swiped a wave of screens with a "CEO thousand-mile test battery life", which was quite hot, and it did not "overturn" in the end. The 150kWh ultra-long battery pack has an average energy consumption of 13 per 100 kilometers for the whole journey of 1044 kilometersWith 2kWh and 3% of the remaining charge, it is still expected to travel more than 30 km, which is quite successful. However, in the process, we raised the question: is it necessary for the ultra-long range of pure electric vehicles?After all, now everyone is overcharging, charging for x minutes, and the battery life is xxx kilometers. In absolute terms, we want the longer the range of BEVs, the better, which will reduce the number and time of charging, and reduce the rumored range anxiety. However, longer range requires higher technology and higher energy to be stacked, which ultimately translates into a high price. 
In fact, in addition to the unnecessary purchase cost, another problem that comes with ultra-long range is the impact on charging speed and charging time. It is reported that the two major technologies of ultra-fast rechargeable battery technology and ultra-long battery life have become physical paradoxes. There are also cases in the industry: Li Xiang once talked about Li Auto's planning of pure electric models, and there was a speech mentioning that if the pure electric SUV they are planning now is on a high-voltage platform, the battery capacity can be reduced to 80kWh, and the cruising range will be further reduced. At the same time, they began to deploy supercharging networks to reduce users' range anxiety, which in turn could further reduce the capacity of the battery. Although the cost of high-rate batteries will increase, it is still more cost-effective than larger-capacity batteries, and the competitiveness of products can naturally be improved. 
Therefore, this logic is that ultra-fast charging is popularized to a certain extent, and the anxiety of battery life will be reduced, and people's demand for large battery capacity and ultra-long battery life will naturally decrease. The battery is out of power, and it is charged quickly, so there is no need to run with a big battery on your back. Even if you run long distances, there are a lot of ultra-fast charges at high speeds. Of course, not only ideal, but also many car companies are actively exploring supercharging technology and laying out supercharging networks, which is the current development direction of the industry. So is it that NIO's semi-solid-state battery this time is not necessary?Obviously not, whether from the perspective of industry development or NIO's own planning, this battery is meaningful. 
First of all, this battery pack uses semi-solid battery liquid as the medium, and the energy density reaches 360Wh kg, which is a huge improvement over the 250Wh kg of the current state-of-the-art CATL Kirin battery. Therefore, compared with the Kirin battery with 100 kWh, the weight has only increased by 20kg on the basis of a 50-kWh increase in power, which can be said to be a major advance in battery technology. The cost of a 150-degree battery pack is very high and can be more than that of an ET5. However, there is a high probability that this battery pack will be "rent-only, not sold". Because from the perspective of almost all users' actual use scenarios, daily commuting, including short- and medium-distance self-driving trips, does not need a 150-degree battery pack at all, and only in the face of long-distance travel scenarios of at least 600 kilometers or more, short-term rental can maximize its value. 
After all, NIO's 150-degree large battery was not originally sold as a kingpin, but based on the battery swap mode, giving small battery owners an option to rent a large battery for a short period of time to run long distances (including long-distance intense driving). It can even be said that it is a short-term rental version of the range expander that NIO usually helps you save and then spend money to load the car when you use it. Written at the end: As far as the current situation is concerned, there is an audience for long-range models, after all, the range anxiety and charging anxiety have not been completely solved, but in the future, ultra-fast charging, including the development of battery swap mode, and small-capacity batteries with lower costs are the mainstream. Of course, there will be more technological breakthroughs in the future, and the two ideas of capacitor expansion and ultra-fast charging may be carried out at the same time, because they each have their own advantages and application scenarios.