Easy Car News On November 16th, 222, the flagship electric car ET7 of Weilai won the five-star safety rating of Euro NCAP (European New Car Safety Evaluation Association), becoming another model of Weilai that won the five-star safety rating of Europe after ES8.
The current Euroncap test standard has added some working conditions, such as dummy remote protection, movable deformable barrier collision, reversing AEB, intersection AEB and so on, which greatly improves the difficulty. In this test, ET7 scored 91%, 87%, 73% and 95% in passenger safety, children safety, vulnerable road users safety and auxiliary safety respectively, which set a new record for the total score of China pure electric vehicles in Euro NCAP. ?
Combination of innovative materials and high-strength structural design
Among all certification bodies in the world, Euro NCAP is one of the most authoritative safety certification bodies in the automotive industry. It was initiated by the governments of five European countries in 1997 and is a professional safety evaluation organization established by combining European Union organizations, professional scholars and high-tech engineering technicians. New cars sold in Europe need to be tested and rated in Euro NCAP. Since 29, Euro NCAP has used a unified star rating for each model, with a maximum of 5 stars.
ET7, as the first model of NT2. platform, received extensive attention at the beginning of its domestic launch, and then it entered the European market in early October and was released in Germany. However, the passenger compartment of ET7 has remained stable in various crash tests in Euro NCAP, and the key parts of the driver and passengers have been well protected, with a rating of 91%, of which child protection scored a perfect score of 24.
The hard core strength behind ET7' s E-NCAP five-star rating comes from the first safety barrier after the collision-the high-strength body structure. Weilai ET7 uses a large number of hot-formed steel in the body structure. Compared with ordinary high-strength steel plates, the tensile strength of hot-formed steel plates is about 4-45MPa. The tensile strength of hot-formed steel plates has reached 5-8MPa before heating and increased to 13-16 MPa after heating forming, which is 3-4 times that of ordinary steel. Its hardness is second only to ceramics, but it has the toughness of steel.
Therefore, the car body made of thermoformed steel plate greatly improves the anti-collision ability and overall safety, and will play a good role in protecting the people in the car during the collision, while the proportion of thermoformed steel on ET7 car body is over 4%. The strength of the body structure of Weilai ET7 is further improved by using 2m-long body and 1m-reinforced aluminum-silicon coated hot-formed section steel on the roof side beam of ET7, and adopting integral reinforcing plate at the position of B-pillar, as well as the technology of aluminum-silicon coated hot-formed material with soft zone.
In the design of the anti-collision beam, Weilai ET7 innovatively adopted the trapezoidal front anti-collision beam design scheme. On both sides of the anti-collision beam, two sections of Japanese-shaped auxiliary anti-collision beams with a length of nearly half a meter were independently welded, so that the overall span of the anti-collision beam reached 1533mm and the overall height reached 252mm, covering 77% of the vehicle width, which was much higher than that of the same class in terms of single span and overall coverage.
Thanks to this first scheme in the world, with Weilai's "all-standard" one-piece aluminum casting Torque box, one-piece aluminum casting shocktower, and aluminum extrusion front longitudinal beam, a solid protection has been built for the passenger compartment. In the crash tests of Euro NCAP, the key parts of the driver and passengers of ET7 were well protected, with a rating of 91%.
At the same time, a large proportion of consumers buy or replace new cars because they have a new member in their family or a new member. Although domestic crash tests have not included child protection in the scoring system, E-NCAP has separated child protection into a separate item to evaluate the star rating since 29. ET7 has achieved the ultimate in child safety, with a perfect score of 24 points. ET7 provides excellent protection for all key body areas of 6-year-old and 1-year-old children's dummies, and gets the highest score in the frontal offset and side barrier tests.
Super five-star safety configuration, providing safety protection for all employees in the whole region
Yan Zhangong, senior director of Weilai Performance Center, said: The technical strategy for Weilai vehicle safety is not only to combine the requirements of laws and regulations in various countries and regions, but also to take the safety of users' daily vehicles as the core of our safety technology research and development, and strive to build a safety system for the whole scene, taking the lead in reducing accident risks. When accidents are inevitable, there can be some technologies.
As the first global model of Weilai, ET7 is committed to providing equal safety travel standards for every user in the world. All active and passive safety configurations are standard, providing safety protection for all employees in the whole region. In the auxiliary security scenario test, all items of ET7 performed well, with 95% excellent evaluation.
In terms of security configuration, Weilai ET7 has achieved complete system-wide standard, and the security configuration of ET7 sold all over the world is exactly the same. The seven airbags include remote middle airbag, automatic emergency braking (AEB), lane departure warning (LDW), lane keeping assistance (LKA), intelligent adaptive cruise (i-ACC), forward collision warning (FCW), fatigue monitoring system, dynamic environment simulation display (ESD), visual fusion parking assistance, lane change blind zone warning (LCA) and automatic control of far and near light. A series of safety configurations, such as narrow lane assist (SDIS), lane center assist (LCC), turn signal control lane change (ALC), lateral door opening warning (DOW), rear crossing warning belt brake (RCTA-B) and transparent chassis, are standard.
Euro NCAP comments: "The automatic emergency braking (AEB) system of ET7 has performed well in the response test of other vehicles. Seat belt reminder systems are standard on both front and rear seats. The standard driver fatigue detection system and lane departure assistance can gently correct the driving path when the vehicle deviates from the lane and quickly intervene in an emergency. "
ET7 performed well in several side impact tests, with a high score of 15.5. Among the 7 airbags that come standard in ET7, the configuration of the far-end intermediate airbag (FCA) appears as a standard in China and Europe, and it is also the first time that the far-end intermediate airbag comes standard in domestic medium and large cars. In the vehicle crash test, the far-end middle airbag provides far-end side impact protection for the front passengers, restricts the movement of the passengers in the collision and protects them from secondary injuries.
In addition, the automatic emergency braking (AEB) of ET7 predicts the possible dangers in advance, and makes reasonable braking measures for vehicles, pedestrians and cyclists on the road, which can avoid collisions or greatly reduce collision injuries in all scenes.
Providing users with products with peace of mind is an important criterion of Weilai's user experience. By building the system capability of forward R&D, Weilai has set high safety standards and strategies for ET7, easily met the five-star safety standards and safety regulations in the global market, and surpassed the five-star in many safety configurations, which is the reason behind ET7' s five-star safety rating in Europe-"every point of safety is worth going all out".
NIO POWER guards the safety of each battery
Weilai has a battery-related team of more than 4 people, deeply involved in the research and development of battery materials, battery cell and package design, battery management system, manufacturing technology, etc., and comprehensively established and enhanced the systematic research and development and industrialization capabilities of batteries, and established advantages in terms of cost, performance and safety.
The battery monitoring system independently developed by Weilai aims at battery safety. By collecting real-time battery temperature, voltage and current information of all batteries, and combining with the self-developed monitoring algorithm, the battery health is evaluated and predicted to effectively avoid the failure risks such as thermal runaway of the battery. Dozens of patents have been laid out for the above-mentioned battery thermal runaway management, which has fully protected the technologies such as thermal runaway sensors and barrier-free flue used in the new generation of battery packs.
In 221, Weilai officially released the 75-degree ternary lithium iron battery, which performed well in the endurance of the vehicles, thus becoming the first brand in the world to mass-produce ternary lithium iron battery packs with CTP technology. Weilai will also launch a new 8V high-voltage platform battery pack in 224.
Weilai's unique battery safety monitoring platform monitors the health status of batteries in real time through cloud algorithm, and links the inflow and withdrawal of batteries in real time. The cell voltage, current, battery core temperature, self-discharge and insulation of each battery are under 24-hour monitoring. Every time a user's vehicle comes to change the power station, it is equivalent to doing a "battery physical examination", which can find hidden dangers in the bud and ensure that safe and reliable batteries are used every time. The defective batteries will be taken out for maintenance and replacement in time, and the batteries that meet the retirement standards will be used step by step to maximize the battery value and avoid environmental pollution.
Weilai's data-based intelligent battery life-cycle management is equipped with a complete monitoring system for power exchange station, including OSS system, Sheild battery monitoring system, security monitoring system, power exchange monitoring system and cloud scheduling system, which can realize real-time monitoring of power exchange and battery charging process, as well as real-time monitoring of environmental data (temperature, humidity, smoke, etc.) in the station, thus ensuring the battery life-cycle management.
The biggest and unique advantage of Weilai is the power exchange mode. It seems that each battery only flows between the power exchange station and the vehicle, but in fact, the safety of each battery is monitored in real time to prevent problems before they happen, covering the global charging and replacing network and weaving a huge protection network for battery safety.
"Every point of safety is worth going all out". As the first model of NT2. platform, Weilai ET7 won the five-star safety rating of E-NCAP, which is based on Weilai's commitment to building the system capability of positive research and development, providing users with products with peace of mind with extremely high safety standards and strategies, and making safety more than "taking the exam".