On May 27th, Tesla’s “T-talk” lecture on car safety was held at the Tesla Service Center in Yizhuang, Beijing. Tesla revealed to the public the logic behind the five-star safety by analyzing the design structure and materials of the domestic Model 3 body-in-white. As a pioneer in the electric vehicle industry, Tesla is known for its paranoia about safety and quality, and always puts safety as the top priority of the vehicle design. In the "T-talk" lecture hall, Tesla said, "Five-star Safety is the bottom line".

　　As an offline event initiated by Tesla, "T-talk" regularly invites the media and people from all walks of life to discuss the status quo of the industry and technological development, jointly promote industry progress, and build a bridge for communication with the media and the public. At the event site, the lecturer analyzed the Tesla Model 3 body-in-white and Tesla’s “safety first design” philosophy, and focused on Tesla’s efforts to improve vehicle safety and the “invisible” "Safety" is the key point.

　　Passive safety | Concept first, the ultimate guardian of safety

　　As we all know, Tesla has very strict and high standards in safety design. In the latest National Highway Traffic Safety Administration (NHTSA) crash test, all Tesla models received a five-star crash safety rating. Among them, Model 3 not only won the NHTSA full five-star safety rating and the ENCAP full five-star rating, but also won the IIHS SAFETY PICK+ top safety award. In the US government's "New Car Evaluation Project", Model 3 vehicles have a lower probability of injury than any vehicle tested.

　　The rigidity and structure of the car body is an important criterion for measuring passive safety. At the T-talk site, Tesla exhibited the Model 3 body-in-white to the guests, and the details of the passive safety design were more clearly presented to the outside world.

　　Model 3 safety body

　　The Model 3 body adopts a steel-aluminum mixed material body frame, which can withstand greater impact force. A variety of advanced connection techniques such as laser welding, resistance welding, riveting, and gluing have further improved the strength of the body. In addition, the several H-shaped anti-collision structures in the front of the Model 3 and the passenger compartment can effectively reduce the risk of vehicle deformation in a vehicle collision accident. The passenger compartment adopts a safe cage structure with multiple collision transmission paths, which can correspond to all side collisions.

　　On the basis of the body structure, Tesla also designed reinforcements for the A-pillar and B-pillar anti-collision parts. The left and right inner plates and reinforcement plates of the A-pillar are made of thermoformed materials with a yield strength greater than 1000MPa. The thickness of the sheet metal is higher than that of similar models. The reinforced A-pillar can effectively reduce the deformation of the door frame during the offset collision. Model 3 achieved excellent results in the IIHS frontal 40% crash test.

　　In the B-pillar reinforcement design, Tesla not only added a reinforcement plate on the upper part of the B-pillar, but also integrated the two layers of reinforcement plates in the side beams with a one-piece design, which can correspond to at least 4.5 times the weight of the curb weight, which makes Model 3 The side impact test results of NHTSA, ENCAP and IIHS are excellent.

　　The goal of all rigorous crash tests is to create safer products. Different from traditional energy vehicles, the safety design of pure electric vehicles not only guarantees the safety of the occupants, but also pays attention to the protection of the battery. On the one hand, the two longitudinal beams in the Model 3 battery pack replace the traditional force-transmitting longitudinal beams to ensure the effective transmission of collision force and battery safety. In the main deformation and energy absorption zone in the middle of the car body, the door sill adopts internally penetrating reinforced beams, which can better protect the passengers and the battery from being squeezed in the event of a side collision or column collision, and minimize the risk of collision .

　　Model 3 threshold beam

　　On the other hand, the left and right through-rolling beams of 1700Mpa further enhance the structural strength of the car body, which can effectively avoid collision and squeeze damage to the battery, and greatly reduce the risk of squeezing the passenger compartment.

　　Model 3 beam (Martensitic steel)

　　It is worth mentioning that the Model 3 body material is front steel and rear aluminum, the motor is arranged at the rear, and the rear end is made of lightweight aluminum parts, which can balance the weight of the motor and ensure effective collapse, energy absorption and occupant protection. Bottom, the front and rear axle load distribution of nearly 50:50 is better realized to provide better handling performance.

　　From Tesla's overall passive safety system, we can see Tesla's full use of passive safety technology and the ultimate protection of drivers and passengers. It is precisely thanks to Tesla's car-making philosophy of "designing safety first" that in a series of crash tests, all Tesla models can achieve such excellent results.

　　Active safety | Smart empowerment adds another line of defense to safety

　　Not only passive safety, but with the enhancement of users’ awareness of safe travel, reliable active safety performance is becoming more and more attention, and Tesla has always been considered a leader in this field, and it has already achieved success in active safety. Great achievements.

　　Recently, Tesla announced the first quarter of 2021 vehicle safety report, data shows: in the driving process with the participation of Autopilot automatic assisted driving, an average of 6.74 million kilometers of driving mileage will have a traffic accident. The US NHTSA data shows that an average of one traffic accident occurs every 780,000 kilometers in road traffic in the United States. Tesla Autopilot automatic assisted driving makes driving safety reach 8.66 times the national average!

　　Tesla has ultra-high safety in active safety, which is mainly reflected in Autopilot's automatic assisted driving. At present, all Tesla models are equipped with Autopilot automatic assisted driving as standard. This function can help users simplify driving and effectively reduce the incidence of accidents.

　　Autopilot auto-assisted driving is based on computer vision. The body is covered with advanced sensors and cameras to build an auto-driving assistance system and active safety system, which can predict risks, predict in advance, implement decisions such as steering, acceleration and braking, and try to avoid accidents. happened.

　　For example, in avoiding side collisions, Tesla side collision warning plays a vital role. Take Model 3 as an example. When a vehicle is detected in the adjacent lane where Model 3 is merged, Autopilot will trigger the side collision prevention function (steering intervention) and ensure that the vehicle automatically steers to a safer position.

　　With the continuous evolution and improvement of autonomous driving functions, Tesla vehicles can be continuously upgraded through OTA over-the-air software updates. In the future, upgraded vehicles will be able to achieve fully autonomous driving in almost all situations, providing users with a smarter and safer travel experience.

　　Safety first is an important factor for Tesla's success in the new energy market, and it is also the fundamental reason why Model 3 has become the world's best-selling car. In Tesla, we have seen the mystery of car safety and the deep concern for consumers. To make the safety more extreme and let users feel more at ease. With all-round safety quality, Tesla makes us believe that the future of electric vehicles will not be far away!