On October 26th, Changan Mazda MAZDA EZ-6 officially launched, at the press conference, the official showed the first successful picture of the challenge of “truck horizontal pinch and bottom scratch challenge” in the EZ-6 industry.
Recently, Changan Mazda and Beijing Institute of Technology Shenzhen Automotive Research Institute conducted a live broadcast on the crash test vehicle to demonstrate its safety performance.
According to statistics side collisions account for more than 1/4 of traffic accidents and the fatality rate is second only to frontal crashes.
The side of the vehicle is the weakest part of the vehicle, unlike the front part of the car has a longer engine cabin to do collision buffer, behind the door is the driver, so the side collision accident leads to a greater risk of casualties.
The scene simulated by EZ-6 ‘s “truck horizontal pinch attack superimposed bottom scraping Challenge” is precisely when the car is passing through the T-junction, the speeding truck violently hits the side of the car body, thus causing the vehicle to glide laterally, and the chassis battery package hits the road tooth, and then hits the wall again, bringing triple rigorous inspection to the body structural strength, airbag protection and battery safety.
in this challenge, the structure of the EZ-6 crew cabin is complete, the passenger living space is sufficient, and there is no structural failure of the A, B and C pillars.
In terms of restraint system, the seat installation point and seat frame have no obvious deformation, the seat belt explodes in time, and the side airbag, side air curtain and distal airbag explode in time, which can be seen through the contact point between the dummy and the airbag.
Airbags protect passengers in the car timely and in place.
In addition, the EZ-6 powers off quickly under high voltage after the collision, and the battery pack does not smoke, catch fire or explode.
in terms of rescue, the emergency flasher of the vehicle is turned on in time, the E-Call emergency rescue function is started, automatic dialing, and manual customer service is connected.
in terms of occupant protection, the comprehensive score of the dummy in the car meets the limit requirements.
In the side impact, the bottom beam, door, B-pillar and roof of the vehicle absorb most of the impact energy, which focuses on the hardness of the high-strength steel of the body and the safety design of the body structure.
The EZ-6 car body adopts a “cage structure of 7 horizontal and 5 vertical”.
When the side impact strikes, the impact force is quickly decomposed and transmitted to the whole car body, so as to avoid excessive force on a single point.
In addition, the hardness steel of the EZ-6 car body above 340MPa accounts for more than 86%, the roof uses 2000MPa crossbeam reinforcement, and the door is equipped with 6 1500Mpa anti-collision steel beams.
Therefore, after the severe impact of the truck, the structure of the EZ-6 cockpit remains intact, the A, B and C columns are not bent and deformed, and the door can be opened normally.
Through the vivid sand table demonstration, Dr.
Zhang Ruifeng, president and senior engineer of Shenzhen Automobile and Aviation Institute, gave the audience an intuitive and clear understanding of the body safety structure of EZ-6: “two side impacts, one chassis rub, and three severe operating conditions occurred at the same time.
A safety challenge is equivalent to the simultaneous occurrence of three kinds of traffic accidents in real life.
From the current deformation performance, the passive safety level of EZ-6 vehicles has been done quite well.
The cage structure design of 7 horizontal and 5 vertical makes the impact force transmit and decompose evenly from front to back, so as to reduce the impact on the part of the car body, improve the anti-collision performance of the whole vehicle, and effectively protect the passengers in the car.
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, [Dr.
Zhang Ruifeng, President and Senior engineer of Shenzhen Institute of Automobile and Aviation], 
, in addition to cage structure, EZ-6 is equipped with 9 airbags, including principal and co-driver airbag, front side airbag, side airbag, front distal airbag, rear airbag, total volume of airbag reaches 350L, protection area 25000 square cm, side air curtain length 2 m, co-driver airbag 120L, front far airbag 43L.
With double pre-tightening and dynamic locking tongue seat belt, the passengers in the car can be fully protected at the moment of impact.
It is worth mentioning that the existence of the EZ-6 front-row distal airbag (front-row central airbag) effectively avoids the secondary injury caused by the collision between the passengers in the car.
Studies have shown that nearly half of the injuries in side collisions are caused by distal collisions, and violent collisions may cause the heads of the two passengers in the front row to shake and hit each other, and this injury can even be life-threatening.
In this collision accident, the far airbag in the front row of the EZ-6 ejected and unfolded in time, and the collision screen effectively blocked the violent collision between the heads of the front passengers and played a vital role in “saving lives” at the critical moment.
whether the battery pack will catch fire or deflagration after a severe impact has become the most concerned safety measure for new energy users to buy cars.
After the EZ-6 battery pack is removed, it visually presents the battery safety management ability after the bottom collision.
Dong Bo, security officer of Changan Mazda, introduced the safety design of EZ-6 battery pack to viewers in the studio.
First of all, thanks to the high rigid protective shell of Vernon Ji battery, the structure of the battery package is not greatly damaged, and the fastening position of the battery does not show large bolt deformation or fixed tear after the impact, and there is only a little friction at the bottom of the battery.
Most of the impact of the bottom is absorbed by the bottom beam and the reinforced beam of the battery pack, so the overall structure of the battery pack of the EZ-6 is not deformed, and the overall structure of the battery pack is not damaged, so it does not further cause smoke or fire caused by damage to the battery structure.
In addition to the solid physical defense, the Vernon Ji battery carried by the EZ-6 is also equipped with digital battery butler technology, which can achieve round-the-clock monitoring, with an early warning accuracy of 99%.
Digital temperature control management technology can achieve the safety goal that even if the core is out of control, the whole package is not out of control.
30 minutes after the heat is out of control, there is no fire and no spontaneous combustion, which is much higher than the 5-minute escape time required by the national standard, which provides an effective guarantee for the safety of passengers in the car.
Professor Sun Chao, director of Beijing Institute of Technology Shenzhen Automotive Research Institute, who was in charge of the vehicle disassembly, spoke highly of EZ-6 ‘s safety architecture: “EZ-6 not only performed excellently in the technical level, but also did a good job in user experience, reflecting Changan Mazda’s excellence attitude and excellence spirit in the automotive safety field.
The safety concept of ‘safety without accident’ and ‘safety without low configuration version’ is well deserved.
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