Yifan from the Vice-Pilot Temple
Smart Car Reference | Official account AI4Auto
Geely Aegis short knife battery, safety test crazy on strength.
It is not enough for 1 steel needle to pierce, it is not enough to puncture 8 steel needles at the same time, it is not enough to penetrate directly with a bullet, the strength is so high, but the result is unexpected.
In addition to safety, this battery has also been greatly improved in terms of low temperature resistance, charging speed and energy density, especially the service life, which is claimed to be able to safely drive more than 1 million kilometers, which is equivalent to 25 times around the earth
The parameters and tests gave Geely a lot of confidence, and directly announced on the spot that "the long knife is not the optimal solution".
It's really "not a word, not a word." ”
"The long knife is gone, and the short knife should stand", is this really the case?
Geely's new generation of Aegis short knife battery was released
The improvement of the Aegis short knife battery is very comprehensive, mainly due to physical characteristics, safety and low temperature resistance.
First of all, the intuitive physical characteristics are:
The length of the battery cell is short, only 0.58 meters, which is about 40% shorter than the long knife.
Geely believes that short has short benefits.
From the perspective of the battery cell, the battery structure is short, the internal resistance is lower, and it is more conducive to fast charging.
The charging rate of this cell can reach 2.45C, and it only takes 17 minutes and 4 seconds to charge from 10% to 80% SOC.
From the perspective of making a battery pack, the CTB (Cell-to-Body Battery-Body Integration) configuration is more flexible in group arrangement, higher in volume utilization, and has an energy density of 192kWh/kg.
Secondly, since it is named "Aegis", as the name suggests, security is a major highlight.
How safe is it? There is no basis for speaking, and the intensity is directly tested.
Geely has conducted several sets of tests on the Aegis short knife battery:
The first is the "acupuncture experiment" in the blade battery, which everyone is familiar with.
1 steel needle is a small case, 8 are punctured at the same time, and stand for 1 hour without smoking, fire or explosion.
Continuing to increase the intensity, with 5.8mm bullets penetrating, there is still no fire or explosion.
This is not over, Geely also carried out continuous seawater corrosion, fire roasting, extreme cold and reciprocating rolling tests on the same battery pack, and finally passed.
Finally, this battery is also relatively resistant to low temperatures, Geely said, the -30 °C temperature battery capacity is still more than 90%.
In general, Geely's new generation of Short Knife Aegis batteries is an all-round upgrade.
Interestingly, when Geely introduced the product features, it has been comparing it with the long knife batteries of its competitors.
He even shouted the slogan: "The long knife is not the optimal solution, the short knife is the new generation".
Is that really the case?
Is the short knife really the best form?
As mentioned earlier, the so-called short knife and long knife batteries are just different in cell length, and they are essentially blade batteries, and the structure is not much different.
In recent years, on the one hand, in order to ensure the supply chain, on the other hand, out of cost reduction considerations, many OEMs have gone out to make batteries.
In addition to Geely, Honeycomb Energy, a subsidiary of Great Wall, has just released a new generation of short knife batteries, shouting similar words:
The short knife battery is the optimal solution under the 800V architecture.
GAC Aion's recently released Inpai P58 microcrystalline super energy cell is also used in the category of short knives.
Geely, Great Wall, GAC... The battery cells recently released by the main engine factory have all chosen the short knife, and it seems that the short knife battery is really the future.
However, although Geely's short knife battery shows advantages in energy density, charging speed and life when comparing long knife batteries, there is one point that should not be overlooked:
There is a product generation gap in this.
The long knife battery is already a product 4 years ago, and the product advantages of the short knife are likely to be the factors of product update and iteration, rather than completely from the form.
At present, it is not possible to directly conclude that the long knife pattern is inferior to the short knife pattern.
Moreover, the size of the short knife battery bet by many manufacturers is less than 0.6 meters, which just circumvents the patents related to the long knife battery:
Therefore, whether the short knife battery is the future trend, or the choice to avoid patents, the two technical routes of long knife and short knife, who is better, for the time being, let the bullet fly for a while.
There are reports that BYD's blade battery will also be upgraded next month, and it is worth looking forward to whether it will turn to a short knife.