Safety is not only the lifeline of the sustainable development of electric vehicles, but also the basic quality of their participation in market competition and shaping their brand image.
Especially with the upgrading and continuous expansion of the demand in the new energy market in recent years, consumers also have more research and judgment on electric vehicles, in addition to price and endurance, the safety performance of electric vehicles has gradually become the priority object of user attention. At present, major automobile manufacturers are working battery technology and body safety, and before the products are introduced to the market, they will undergo various complex and rigorous safety tests and certifications, and the safety standards are even higher than that of fuel vehicles.
Among them, GAC Mitsubishi Artuka's pure electric philosophy is the most impressive, whether it is a cruising range of 520km, or a half-hour recharge efficiency that can charge electricity from 30% to 80%, which makes this car have a strong competitiveness, and it also uses comprehensive and thoughtful safety protection to reassure users. A few days ago, the National Automobile Quality Inspection and Inspection Center (Beijing Shunyi) conducted a series of safety quality inspections on Artuka, and then we will decipher whether this car officially advertised as a hardcore pure electric SUV is really "hard" enough.
Super "anti-pressure", say NO to deformation!
As we all know, spontaneous combustion accidents occur when electric vehicles collide, most of which are caused by damage to battery packs. To a certain extent, the "pressure resistance" of the battery pack will directly determine the safety performance and level of the electric vehicle.
In order to test the rigidity and extrusion resistance of Artuco battery packs, engineers from the National Automotive Quality Inspection and Inspection Center used the extrusion head of the front cylindrical radius of 75 mm to squeeze the battery in the direction of the Y axis and the X axis respectively, at a speed of 2 m/ s, stopping when the extrusion force reached 100KN (10 tons) or the shape variable reached 30%, and held for 10 minutes, after which it will be left to stand for two hours. Judging from the monitoring screen, the Atuka battery pack body has basically not undergone any deformation under the squeeze of 10 tons of force, and the part affected by the extrusion force is the buffer part of the outer edge of the battery pack.
After 2 hours of standing observation, the engineers made a minor inspection of Artuka's battery pack, and as seen in the monitoring, the main part of the vehicle battery did not undergo any deformation, only the outer edge of the battery pack buffer part was affected. Crucially, the power connector located in the X-axis direction also "does not move" when squeezed by 10 tons of force. Throughout the test process, it can be found that the battery pack is not deformed, not on fire, no smoke, showing super pressure resistance.
Different from traditional fuel vehicles, in order to provide more "lasting" endurance, electric vehicle batteries generally develop towards large volume and large mass trends, and the adverse impact is to seriously occupy the space of the car body, resulting in difficult arrangement of horizontal and longitudinal beams, to a certain extent, the battery pack itself will act as a transmission path for positive and side collision energy. When the vehicle is violently collided, the internal space will inevitably be invaded, if the deformation of the shell squeezes into the battery pack inside the battery pack, an internal short circuit may occur, when 70% of the energy of the entire battery pack will be released through the short circuit point within 60s, resulting in thermal runaway of the battery.
Therefore, the battery pack extrusion test is the main method to verify the structure and internal safety of the battery pack. When the vehicle is bumped or rear-ended, due to the ample energy absorption space in the front and rear of the vehicle, the power battery pack usually does not suffer crush damage. However, when the vehicle is hit by a side impact, because the energy absorption space is small, the impact force will be transmitted to the floor beam and the central passage through the threshold, and the power battery pack is easily damaged by squeezing, resulting in damage to the module and the single body inside the battery pack.
In this regard, Artuco chose to directly use the battery pack to accept the test, and squeezed the battery in the direction of the Y axis and the X axis respectively. In accordance with the requirements of the national standard GB38031-2020, its battery pack has withstood the squeeze of 100kN. The reason why it can successfully pass the national standard-level anti-extrusion test is mainly because its battery pack adopts high-safety battery cells, built-in fire blankets and other designs, and has passed nearly 100 tests before loading, and the number of test items is nearly 4 times that of the national standard, which brings sufficient safety protection to the vehicle. Even when the vehicle is hit by great pressure, it can effectively protect the battery pack from external forces. In the extrusion process of up to 10 minutes, the battery pack basically does not have any deformation, and the part affected by the extrusion force is the buffer part of the outer edge of the battery pack. The internal battery cell has no fire and explosion, which is enough to prove the absolute protection ability of Artuka battery in the collision.
Double-sealed protection, writing "perfect airtightness" into the DNA
It is often said that water and fire are intolerable, in fact, for electric vehicles, "water" and "electricity" are also a pair of dead enemies. In general, its wading scenes mainly include: high-pressure water gun washing during car washing; wade in rainy weather; and vehicle exposure to deep water in rain/flood weather.
It should be clear that the general battery flood failure will not have the risk of electric shock to the driver and passenger, because the resistance value of the ground and water is very large (greater than 1MΩ), even in the case of leakage, the current through the human body will be less than the safe current of the human body (generally 10mA DC). Therefore, the risk mainly focuses on the attenuation of the electrical safety performance of the battery pack, fire and explosion, etc. When the vehicle is in different states, the results of battery immersion failure are also different. If the vehicle is in a stopped state, it will not be able to start when it starts again; if it is in the process of driving, it may be limited to make the vehicle stop; if the vehicle is in a charging state, the charging may be interrupted.
If the seal of the battery pack is not broken, it may only lead to a decrease in the insulation impedance, and it will undergo multiple immersion and wading, which requires an abnormal environment outside to accelerate the decline of the electrical performance of the battery pack. Like last year, there was a lot of precipitation and concentration in many parts of the continent, and in order to test the reliability of the battery pack in such extreme weather, it is particularly important to test the vehicle with water immersion.
First of all, the engineer soaked Artuka's battery in fresh water for 30 minutes, during the soaking process, the lowest point of the battery pack was 1 meter below the water surface, and then fished out and left for observation for 2 hours, and finally unpacking and inspection. As we mentioned above, the battery pack is not necessarily instantaneous, it takes time to "penetrate" the battery pack, and standing for 2 hours can also more intuitively test how tight the Atukao battery pack is.
As the engineers unscrewed the fastening bolts on the battery pack shell one by one and removed all defenses, Atuka's internal battery pack finally "unveiled the mystery". Engineers carefully check the inside of the battery pack for water marks, and then begin to test the insulation resistance of the battery pack. It can be found that there is no water trace inside the battery after unpacking; in addition, according to the national standard requirements, the insulation resistance of the positive electrode of the battery and the housing should be greater than 100Ω/V to ensure that the high-voltage system does not leak electricity, causing damage to the occupants, after measurement, the insulation resistance value of the Atuka battery pack is only 752Ω/V, and the measurement insulation resistance is much greater than the national standard requirements.
According to the relevant national regulations, the battery waterproof level needs to reach IP67 level, simply put, it is to soak the battery in water for 1 hour at room temperature and pressure without leakage of electric shock, which means that the vehicle easily faces the watery road surface or heavy rain scene. From the test process, artulco battery pack soaked in 1 meter deep water and let stand for 2 hours without leakage, which means that its waterproof performance is outstanding, like the general wading section it can still pass safely and easily, leading the industry standard in battery sealing and safety. This is because the Atuka Battery Pack uses a double-layer sealed protection design, compared to other brands of single-layer design, the battery is safer so that the battery pack is more carefully protected, even if used in a complex and harsh environment, it will not cause safety accidents.
"Can carry and fight", a steel and iron bone
In addition to the safety DNA of battery rigidity and air tightness, which can "talk about heroes", GAC Mitsubishi also gives Artuka a solid "golden body" through solid materials and strict body-in-white standards, and brings more comprehensive protection to the occupants with leading body strength.
According to relevant statistics, the car's lateral impact accident and rolling accident will cause a high casualty rate, because there is no wide buffer zone at the top and side of the cabin, and under the action of external forces, the body will infringe on the occupant space in the cabin. How will Artuco perform in the face of the body rigidity test? Can this tough appearance withstand the "perverted" squeeze test?
First, the engineers began a top static pressure test with an extrusion force of 2.8 tons, 1.5 times the mass of the vehicle. After the test instruments buzzed for a while, the engineer said that the test was complete, and surprisingly, Atukao's body was almost untouched, and after careful observation, Artuco only had wrinkles next to the roof rack. By measurement, the displacement of the extrusion site is only 20.5 mm, which has almost no impact on the people in the car.
The engineers then "added weight" further, began to carry out side door extrusion tests, and applied a force of 5.7 tons to the main driver's seat door (at this time the force was 3 times the mass of the vehicle). Although the door has changed significantly after completing the extrusion test, and the main driver's window is broken as a whole, according to the measurements, the displacement of the extruded part of Artuka is 215.5mm, which does not cause damage to the interior space. Through the GoPro picture placed in the car, although the door has inward displacement, the displacement is not enough to affect the interior space, Artuka also successfully supported the 5.7 tons of extrusion force, and successfully passed the body rigidity test.
"Real gold is not afraid of fire refining", in order to test the limit of atuka's body rigidity, the engineers also tested the top pressure on the other side of the body, and doubled the squeeze force, but the result was consistent with the first time, the roof was only a little deeper, the cab was almost "intact", and this "extra pressure" was also easily resolved by Artuka.
As we all know, the stronger the rigidity of the body-in-white of the vehicle, the better the safety protection of the drivers and occupants in the car when a collision occurs, which is also an important reason why the car will be equipped with an anti-roll frame. On the family car, the most important part affecting the safety of the crew compartment is actually A and B pillars, so in the manufacture of the body in white, automakers will focus on the use of A-class steel or S-class steel with high tensile strength for these parts to ensure the basic safety of the crew compartment frame, and then with air bags and side air curtains, the safety of the personnel in the car can be better guaranteed.
Judging from the test results, whether it is the roof or top pressure test or the door pressure test, Artuka has all been resolved one by one. It is reported that Artuka body uses die-cast aluminum, extruded aluminum, stamped aluminum, high-strength steel and other high-quality materials, so that its body bending stiffness of 26744 N / mm, torsional stiffness of 2849 Nm / rad, which means that the body in 2.7 tons of force (≈ 1 African forest elephant) under the action of only bend 1mm, twist less than 1 °, with battery after the body withstands more than 3 tons.
It can be said that the original aluminum alloy pure electric platform adopted by Artuka is like a "cage safety fortress", and the aluminum-steel hybrid method greatly improves the strength of the body and the efficiency of crushing energy absorption, plus the scientific force transmission path and structural design, so that it has a stable impact bearing capacity. Such a strong safety body means that whether it is a frontal collision, a side collision or a rollover of the vehicle, the safety of the occupants can be protected at all times. Through every invisible material and detail, and hundreds of thousands of trials optimized, reliability is truly written into the product DNA.
Judging from the test results, GAC Mitsubishi Artucko has a relatively good performance in both battery protection and body rigidity, combined with its configuration power parameters and other hard forces, GAC Mitsubishi undoubtedly contributed a competitive joint venture hardcore pure electric SUV to the new energy market. What can also be seen is that in the era of electric vehicle strides, GAC Mitsubishi has set aside impetuosity, used solid materials and its own technical background, and a passion for safety and users to explain what safety is the greatest product force.
![When hardcore brands meet pure electric models, Artuka fully demonstrates "hardcore safety"![fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)