Oil prices soared, so much so that pure electric began to "explode" again.
After all, a pure electric vehicle can not only greatly reduce the cost of using the car, but also has an excellent driving experience, so it is natural for more and more consumers to pay attention.
However, in the process of purchasing pure electric vehicles, the mileage is still the focus of everyone's attention.
As the "number one indicator" valued by consumers, the mileage is naturally the core focus of the competition of car companies.
In the past year, a number of new models with a range of 700km+ have been launched.
Among them, GAC Aian's Aion LX PLUS has reached 1008km, which can be said to be a new milestone in the development of electric vehicles, and the Xiaopeng P7 is finally no longer alone.
The breakthrough in electric vehicle endurance is actually a breakthrough in battery technology to a large extent. What kind of technology have these masters?
Today, let the electric star people take everyone to take a look.
(1) GAC Aean, nano sponge silicon anode plate battery made a great contribution
It can be seen that in the current mileage arms race, GAC Aean has mastered the absolute advantage, it launched the first model with a range of more than 1000km, Aion LX PLUS, officially announced that electric vehicles have entered the era of monthly charging. To achieve such a leapfrog achievement, it is obviously impossible to use conventional battery technology.
The secret of GAC Aean is to add a new set of nano sponge silicon anode chip technology on the basis of the traditional high-nickel ternary technology. That is to say, the anode material of the power battery is changed from the traditional graphite to the silicon-based anode with a larger theoretical capacity, so that its negative electrode energy storage capacity is increased by nearly 10 times, and the capacity of the natural battery goes up.
However, the silicon anode material has a fatal weakness, that is, its volume of expansion and contraction during the charge and discharge process changes very largely, so although the energy storage capacity is strong, it is easy to crack and break in the charge and discharge cycle, so that its energy storage capacity will be weakened and the battery life will be greatly reduced. So for a long time, scientists' assumptions about the anode of silicon can only be admired.
In order to solve this problem, GAC Aeon has launched sponge silicon anode chip battery technology. It is to make the silicon anode sheet into a sponge-like characteristics, it will collide after absorbing water (charging), but after who discharges (discharge) will return to its original state, the battery inside the silicon anode sheet collision and contraction to leave enough space to ensure that it will not burst.
Of course, it is not enough to do this, GAC Aeon also added a binder technology with self-healing function to the silicon anode sheet, which can modify and optimize the binder in the polar plate, even if the silicon anode pole piece is damaged, it can also be repaired during the expansion and contraction process, and always maintain the stability of the electrode structure.
With the blessing of these two sets of technologies, the energy storage capacity of this new type of nano-sponge silicon anode battery has been greatly improved, which is 20% smaller than that of traditional batteries and 14% lighter; the energy density of battery cells has reached 280Wh/kg. To put it bluntly, in a smaller space, a lighter battery with greater energy is put in, thus achieving an amazing endurance of 1000km+.
Of course, GAC E-An is not only this black technology. Don't forget that in addition to the Aion LX PLUS, the 200,000-class Aion V PLUS comprehensive endurance has also exceeded 700km, which is the lowest price model in the top ten. This shows that in the traditional battery technology, GAC Aeon is also relatively leading.
(2) In the Ningde era, the heroes behind the extreme fox and Xiaopeng
Xiaopeng P7 is the first model with an endurance of more than 700km, Jihu has two models on the list, the little-known Hechuang 007 as a "new new force", but also broke into the top ten, behind them is actually standing the same figure, that is, the Ningde era.
Previously, Polar Fox had revealed that the battery pack used by Polar Fox Alpha S had a very high energy density and used the latest technology in the Ningde era, thus achieving an amazing 708km endurance. The official saying is that you can roam the peach orchards, but also follow the poems and distant fields.
However, in addition to the ultra-high energy density battery given by the Ningde era, Polar Fox also has its own set of technologies to adapt. For example, Alpha S's battery pack thermal management system is the 3rd generation battery system design of Beiqi Blue Valley, which embeds the liquid cooling pipeline and joint of the liquid cooling system into the profile side beam, so as to achieve a design effect of wet and dry separation.
On the one hand, this improves the safety of the battery system, and on the other hand, it uses the sidewall space of the battery box to improve the volume utilization rate of the battery pack. The battery pack of Polar Fox Alpha S also uses intelligent constant temperature protection function, which can intelligently calculate the opening time and threshold of thermal insulation heating, which further improves its low temperature performance, thereby achieving longer battery life.
As the "first generation" to achieve 700km + endurance, Xiaopeng P7 specially developed a new set of square battery pack, the battery outside the use of all-aluminum box, a large number of internal application of SMC composite materials, which makes its battery achieve extreme lightweight, energy density of 170Wh / kg, this data was very leading at that time.
Of course, the 706km of the Xiaopeng P7 is somewhat disgraceful, that is, although its long-endurance version is the highest match, it does not have intelligent driving functions, which is to minimize weight and power consumption. At that time, the media commented that Xiaopeng relied on the vehicle to "carry" to 706km, and indeed spent a lot of thought. However, considering that this is a model launched in 2020, the P7's performance is still very impressive.
(3) The main push cylindrical battery, Tesla 4680 will kill?
As a leader in the electric vehicle industry, Tesla has three models that successfully made the list, although none of them made the top five. But considering that Tesla does not have many models, this result is already very good.
Tesla is one of the few car companies in the industry that uses cylindrical batteries, which once made it a leading company in dimensionality reduction. In 2017, Tesla Model S took the lead in achieving a 579km long endurance, and its secret is actually a cylindrical battery.
Cylindrical batteries are different from traditional square shell batteries, because its stress can be evenly divided around the battery, only a small amount of reserved space can meet the battery's charging expansion, so its shell ratio is much higher than the general square shell battery. Normally speaking, the shell ratio of cylindrical batteries can be more than 97%, while the square shell battery is only about 90%.
But the cylindrical battery has a fatal weakness, that is, the impedance is too high, the larger the cell is made, the greater the energy lost by the battery temperature rise, so it is rarely used as a large-capacity power battery. Even Tesla has only upgraded from the 1865 type (18mm in diameter and 65mm in height) to the 2170 in so many years. It can be said that from 17 years to the present, Tesla's battery progress is very small, which is why it has been squeezed out of the top five.
However, this situation will soon change, according to the latest news, Tesla's 4860 battery is about to be mass production, this new battery using stepless ear technology to reduce the impedance of the battery itself. It will have 5.5 times the capacity of the existing 2170 battery, and after reducing the space occupied by the internal materials, the energy density of the new battery will be greater, which will increase the battery life of the new car by 16% and reduce the cost by 14%.
That is to say, it is very likely that in the second half of this year, or the beginning of next year, Tesla will regain the top five positions in the list, and the price will fall further.
(4) Wisdom drives public theory
At present, in the top ten positions, the Ningde era occupies four seats, Tesla occupies three seats, Eian occupies two seats, and a pole Kr 001 uses Xinwanda, which is also a dark horse.
It seems to be a competition between major car companies, but in fact, it may be the challengers such as Eian and Tesla in the Ningde era. As the world's largest battery producer, CATL seems to have been less technologically advanced, which is probably the reason why its stock price has recently plummeted.
Ning Wang wants to continue to maintain a high stock price, and I am afraid that he will have to come up with some new killer skills.