Who is safer, tram or petrol? There are arguments to each and every one of these questions. In the eyes of many fuel vehicle users, electric vehicles have multiple problems such as battery risks and assisted driving failure. In the eyes of tram users, the outdated safety configuration of fuel vehicles and the backward body architecture do not have any advantages in terms of safety. So once a collision occurs to the end, who is safer, let's analyze it objectively.
With the rapid development of the electric vehicle market, various manufacturers will deliberately pay attention to safety issues when designing electric vehicles, and a large number of structural applications will be strengthened to protect the battery. For example, BYD's blade battery, GAC Aion's magazine battery, Great Wall's Dayu battery, etc. Many people hear their names strangely, and these are nothing more than to improve the safety of the battery from the design and structure of the battery, and the intervention of some battery thermal management systems will also make the safety system of the battery continue to upgrade. Therefore, in the crash tests of safety agencies such as China Insurance Research Institute and IIHS, electric vehicles have repeatedly refreshed the highest safety records.
Another thing worth noting is the weight, as the battery capacity of the tram increases with range, and so does the weight of the car. The same size of the sedan, Tesla Model 3 rear-wheel drive version curb weight of 1760kg, and 1The 5T Sutar is 350kg lighter.
According to the laws of physics, the kinetic energy generated when a car collides = 05x mass (the weight of the car) x velocity squared, which means that when the velocity is the same, the heavier the object will produce more kinetic energy after impact. Therefore, at the beginning of the design, the tram needs to have a stronger energy-absorbing effect than the fuel car, which means that the body material and structure are optimized to be stronger than the fuel car.
Therefore, in the design of the body, the role of the energy-absorbing zone is to compress the unloading force, so the energy-absorbing zone can reduce the collision speed, thereby reducing the damage caused by the collision accident to the occupants. Generally speaking, the heavier the vehicle, the harder the energy absorption area, and the smaller the weight of the vehicle, the softer the energy absorption area, so as to achieve twice the result with half the effort. Therefore, if the design is reasonable, the electric vehicle will be stiffer than the fuel vehicle in order to have the same energy-absorbing effect.
As early as a few years ago, the IIHS did a test of a large car hitting a small car. They collided with the mid-size SUV Kia Sorento and the compact sedan Kia K3, and they could see that although the K3 had no obvious bending of the A-pillar, the front side of the car was basically completely collapsed, and even the doors and wheels were completely deformed. Sorento, on the other hand, was much more damaged than the K3, except that some equipment had exploded, and there was no collapse, and the A-pillar and the front of the A-pillar were intact.
If this does not already make sense, a large weight is more advantageous than a small weight. From a physical point of view, we can analyze that the action and reaction forces are equal in magnitude and opposite in direction. When a heavier object collides with a smaller heavier object, the reaction force of both is actually the same. Force = mass x acceleration (f = m a), so when two cars collide, if the same force is applied to cars of different weights, the weight will be inversely proportional to the acceleration. This is why we often see that when a big car hits a small car, it will hit the small car and "fly", that is, the small car will go backwards.
Therefore, if the tram collides with the gasoline car when other safety features are stable, it must be the heavier tram that wins. In addition, if we add the higher strength body and harder energy-absorbing area of the tram under the same safety standards as we mentioned earlier, then the advantage of the tram will be greater when the tram collides with the fuel car.
Therefore, the difference in weight also has the greatest impact on the outcome of the vehicle in the event of an accident. Data from the U.S. Traffic Accident Study show that the death rate of occupants in a car is inversely proportional to the weight of the car. When the weight ratio of the vehicles differs by a factor of 1, the fatality rate at the time of the collision reaches 115 times. Therefore, weight is still very important for the safety of the vehicle.
Of course, what we are talking about today is only for the comparison of the different weights of electric cars and gasoline vehicles in the same safety environment. If you really want to say that the tram will be **unsafe, then please calm down. If the battery safety of the tram can really achieve zero ** zero accidents, then the advantage of the tram in the event of a collision must be greater than that of the fuel car.