Tesla communicates with China media about the contents of Battery Day.

In the early morning of September 23rd, Beijing time, Tesla held the world-famous "Battery Day" and global shareholders' meeting in the United States. For this day, CEO Musk sent a number of push preheating on Twitter, which also made the market have high expectations for this battery day. So, what did Tesla say on the day of Battery Day, and then at the China media communication meeting held in Shanghai? What does Tesla, who rarely communicates face to face with the media, want to convey this time?

The first point:

Endless ear electricity?

The biggest highlight of this battery day is the brand-new 4680 electrodeless battery. In order to rapidly expand the production scale, greatly reduce the battery cost and greatly improve the cruising range, Tesla has developed a brand-new 4680 electrodeless battery with a height of 80mm and a diameter of 46 mm Compared with traditional lithium batteries, there are no protruding tabs at both ends of the battery. This design can significantly reduce the calorific value, solve the heat dissipation problem of high energy density batteries and improve the peak power of charge and discharge. Finally, the energy and power of the new battery are 5 times and 6 times that of the past, respectively, while the cost is reduced by 14% and the cruising range is increased by 16%.

At the media communication meeting, Tesla staff told reporters that removing the two tabs of the traditional lithium battery can accelerate the heat dissipation of the battery and make it easier to control the heat when the battery works. "The advantage of this technology is that all electrons in the battery need to enter and exit from the polar ear to generate electricity, but it will also lead to hordes crossing the wooden bridge, making the vicinity of the polar ear very crowded and generating a lot of heat, which is a waste. Now, after applying a higher-tech welding process to make it into an electrodeless joint shape,

The second point:

Raw material silicon anode material

On Battery Day, Tesla said that the anode of the battery will be redeveloped with silicon raw materials with good energy storage effect, and elastic ionic polymer coating will be added to stabilize the silicon surface structure and improve the stability and safety of the battery. This technology can increase the cruising range by 20% and reduce the cost by 5%.

Tesla chose silicon instead of graphite as anode material for another reason, that is, the capacitance of silicon is better than graphite. But silicon has never been used before, because it will expand after absorbing electrons, which makes it difficult to control the shape of the battery. But Tesla has overcome this problem, so the large-scale application of silicon anode materials is just around the corner.

The third point:

Cobalt-free high nickel cathode material

Cathode materials are very important to improve energy density, so Tesla developed cobalt-free high-nickel cathode materials, which maximized the nickel content, and adopted new coatings and dopants, which reduced the cathode cost by 15%.

The fourth point:

Quanxin battery factory

Because the new 4680 electrodeless battery does not need to install and weld lugs, the manufacturing process is simpler and there are fewer parts. To this end, Tesla has built a new production line, the production capacity is seven times that of the previous production line, which can significantly improve the production efficiency, and at the same time reduce the investment cost per kWh of production capacity by 75%, providing favorable conditions for rapidly expanding the production scale.

The fifth point:

Brand-new vehicle manufacturing technology

Tesla developed a brand-new car body structure, which designed the battery pack as a car body structure and integrated the battery pack with the front and rear parts of the car body. This structure brings an ultra-high strength body, and the weight distribution of the vehicle is closer to the center, which brings more flexible handling. In order to realize this design, Tesla specially developed an unprecedented new formula alloy material to strengthen the strength of the car body. This body structure will increase the cruising range by 14%, reduce the overall structural weight by 10%, and reduce 370 parts. "The integrated process of the car body and battery allows the chassis of the whole vehicle to replace the original assembly effect of hundreds of parts with only a few models, which greatly improves the efficiency and reliability of the whole vehicle process and makes the cost correspondingly very low."

Through system combination innovation, Tesla's battery cost per kWh is reduced by 56%, cruising range is increased by 54%, and investment and production costs are reduced by 69%. However, it will take about 18 months for Tesla to form the above advantages, and it will take about three years to fully realize it. At the same time, based on the greatly reduced production cost, Tesla is confident to develop an electric car with a price of around $25,000 within three years.

In addition, Tesla released the Plaid with a new powertrain for the first time on Battery Day. Models? S. The new model will be delivered next year. The maximum power exceeds 1 100 horsepower, and the quarter-mile acceleration time is less than 9 seconds, which exceeds the world's top internal combustion engine. Zhu Xiaotong, president of Tesla Greater China, said that Tesla's vision is to accelerate the transition to sustainable energy. This makes Tesla pay more attention to how many peers can join the transformation of the automobile industry at a faster speed. "Despite the high value of Tesla, the transformation of the industry is still in its infancy." For Tesla China, the localization goal is to build a car whose original design, R&D and manufacturing all originated in China and sold all over the world. Zhu Xiaotong said that this is because only original engineering and technology development can attract top talents. At present, they are preparing for body design and R&D personnel recruitment.

Reporter's notes

This visit to Tesla once again makes people feel that this is a company with goals. The new technologies announced on Battery Day are basically around improving efficiency, simplifying processes and reducing costs.

In the reporter's subsequent visit to Tesla's Shanghai factory, it was also found that the vertical and three-dimensional production line flow, the supply of container parts for storage and the simple workers' rest area all reflected a clear factory function.

The software and applications carried on Tesla products also reflect different ways of thinking and learning. This is attractive to consumers. In the future when the importance of software is becoming more and more important, perhaps the attraction of a car lies not in the product itself, but in the connection between the thinking mode of the manufacturer and the user behind it.

The sources of this article are all from live video screenshots.

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.