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auspiciousThe Galaxy E5, a heavyweight pure electric SUV, is about to be launched. The reason why this car is called heavyweight is that it is the first model to adopt the GEA architecture and the first to adopt Geely's Aegis Short Blade battery. I just test drove it a few days ago. It is a very balanced and easy-to-drive car.

In fact, for pure electric vehicles, safety and battery life are what consumers value most. So they also did these tests before the launch, violently dismantling a Galaxy E5 battery pack that had been tested for 300,000 kilometers. At the same time, they also tested the health of a battery pack that had been charged and discharged 921 times.

This Galaxy E5 has traveled 300,000 kilometers, and the battery pack is intact. The battery pack uses Geely's latest short-blade shield battery. This short-blade battery has several obvious advantages, the first of which is safety. This short-blade battery is shorter, has lower internal resistance, and generates less heat, which can effectively reduce the safety risks.

Secondly, it uses a wet double-coated diaphragm inside, which is more flexible and not easy to break when punctured, and the damaged pore size is small, and the short-circuit area is small. It also uses heat-resistant coatings such as alumina, which is similar to adding a "separation belt" between the positive and negative electrodes, so that the battery is not easy to shrink during more severe acupuncture, avoiding thermal runaway, and the diaphragm has better thermal shrinkage performance.

So not long ago, Geely conducted a safety test, using 8 5mm diameter steel needles to pierce the battery at the same time and keep it for 1 hour, and the battery cell did not smoke, catch fire, or explode. In addition, a 5.8mm live bullet was used to penetrate the battery cell in the test, and under extreme damage conditions, it still did not catch fire or explode. These tests are enough to show the safety of this short knife battery.

In addition to the safety of the battery cells, the safety of the Galaxy E5 battery pack also comes from the industry-leading CTB configuration, and the focus on strengthening the protection structure of the single pack. It adopts a more solid field-shaped frame, and reserves a large energy-absorbing buffer space between the battery cell and the frame. At the same time, multiple protection designs such as liquid-electric separation, electrical isolation, and heat conduction are carried out, which comprehensively improves the safety level of the battery pack.

During this violent disassembly, the battery pack was once again subjected to extreme tests, including "immersion in sea waves, extreme cold on the plateau, high-frequency bottom scraping, 26-ton violent crushing, single-pack side column collision, and fire burning and roasting". The battery pack still did not catch fire or explode.

In addition to safety, the dagger shield battery installed on the Galaxy E5 also has a long lifespan. When disassembled, the battery pack has been charged and discharged 921 times, and after testing, the health of the battery pack still reached 90.5%. So what is the concept of health? Generally speaking, this many cycles of charge and discharge are enough for the whole vehicle to achieve more than 400,000 kilometers. For an average family car that travels 20,000 kilometers a year, it will take 20 years.

The battery packs of similar products on the market currently have a capacity decay of 80% after completing 500 charge and discharge cycles (about 250,000 kilometers of driving mileage). The cycle life is much lower than that of the Aegis Dagger battery pack.

Why can the cycle life of the Aegis Dagger battery be so high? First of all, the Aegis Dagger battery is small in size, has low internal resistance, and has low heat generation in the battery cell. The internal chemical reaction rate is effectively slowed down, which can extend the battery life. In addition, the multi-element doping of the positive electrode material can increase the energy of the positive electrode material, stabilize the material structure and ion diffusion channels, improve ion conductivity, enhance cycle performance, and use a special coating method to mechanically isolate the electrolyte, inhibit the dissolution of metal ions, enhance conductivity, and reduce side reactions. In addition, the negative electrode material uses small particle materials to shorten the Li+ diffusion distance, increase the electrolyte infiltration area, and use amorphous carbon coating technology to greatly reduce the electrochemical side reactions of the material and ensure the cycle performance of the battery cell.

In fact, the Aegis Dagger battery on the Galaxy E5 has an obvious advantage, because its internal resistance is smaller, and the optimization and upgrading of the material system can greatly improve the fast charging performance. I have test-driven this car a few days ago, and conducted a special fast charging test. On a 160KW ordinary fast charging pile, the charging time from SOC 10%-80% is exactly 20 minutes. This speed is definitely the best among pure electric vehicles of the same level.

Through this test, we can clearly see the huge advantages of Geely's Aegis Dagger battery, whether it is safety, charge and discharge cycle life or charging speed. The first Galaxy E5 equipped with this battery is about to be launched. I believe that with the addition of the Aegis Dagger battery, GEA platform architecture, Flyme Auto and other labels, the product strength of this car will be greatly improved.