During the Spring Festival of 2020, Li Yunfei, the head of BYD’s public relations brand, sent a message to Yang Feng, asking how a photo of BYD Han’s transshipment after the experiment had gone out.
As the director of BYD Han products and the person in charge of development, Yang Feng is a little helpless. "At that time, I told Yunfei that I still have nearly 500 cars here. Would you like to have a look?"
On March 16th, BYD opened the automobile and parts testing center to the media, especially the vehicle crash laboratory, and also showed several BYD Han after the crash test. Through the window of the collision laboratory, media reporters can also see a large number of BYD Han trial-produced scrap cars stored outside the laboratory.
Byd Han after a side collision
"There were more words last year, because after a year, many cars have been disposed of." Yang Feng told the media. "(BYD) Han in the whole process of research and development, we just trial-produced nearly 500 vehicles for safety testing, durability testing and reliability testing, including various subjective and objective evaluations, which can be said to have gone through a lot of trials."
One will make a million bones dry. Byd Han, on the other hand, is "one car makes a hundred cars dry." In order to develop this benchmark model, BYD has invested heavily. BYD Han not only carries all the latest technologies in the field of BYD smart electric vehicles, but also uses the experience accumulated in the development and verification of new energy vehicles since the car was built.
For example, since 2009, the classic e6 has been used for the crash test of electric vehicles, and BYD Han has made trial-produced cars one by one. Many projects are beyond the domestic collision standards and meet the standards of the United States and Europe.
one
Design safety performance according to L level.
In BYD, engineers define the vehicle performance by grades according to "LACU".
Take Han as an example, its safety performance is defined as "L" level. The so-called "L" means "leading position in the industry". (LACU strategy -L:Leading industry leading position; A:Among’s leading position in the industry; C: competitive in the industry; U: uncompetitive industry is not competitive)
The first is the simulation design. In the process of developing the Han model, BYD engineers use mathematical models to simulate the passive safety of the whole vehicle, system, subsystem and parts in the event of collision. Optimize according to the problems exposed in the experiment, and finally reach the design expectation of "L" level.
In order to meet the defined safety standards, Han adopted a high-safety car body, in which 43 military-grade thermoformed steel materials were used, and BYD Han’s body-in-white thermoformed steel consumption reached 97kg, which not only ranked first in China brand cars, but also nearly twice as much as the second.
Secondly, test verification, especially collision test.
BYD invested heavily to build a vehicle crash laboratory, which can meet the requirements of national standards, American standards, European standards and other laws and regulations and C-NCAP evaluation tests. According to the characteristics of electric vehicles, BYD has designed more experimental methods and means on the basis of relevant standards.
In addition to the common crash tests such as frontal, side and rear-end collision, Han also conducted more stringent and complicated safety tests for the complexity of road traffic and the characteristics of new energy vehicles, such as frontal crash with a top speed of 120km/h and ultra-difficult small offset collision, to ensure the safety of users in extreme traffic accidents.
Byd Han trial-produced car after roof static pressure test
2
Verify durability and reliability according to 1 million kilometers.
In addition to the verification of safety performance, BYD also verified the durability and reliability of Han.
First of all, BYD collected real data covering all parts of the country, such as road condition data, temperature data and humidity data, and simulated experiments in various extreme scenarios, just to restore the real car scene of users.
According to industry standards, the vehicle life of 150,000 kilometers is enough to cover 90% of users’ needs. The design life of most high-end cars in the market is 300,000 kilometers, while the target life of Han models is 600,000 kilometers, which is twice as much as that of most high-end cars of the same class.
In addition to the real vehicle road test, BYD has also adopted a large number of internationally advanced high-tech test equipment for laboratory testing. "24-channel road simulation test" is one of the most rigorous links, which can restore 95% of the road conditions that users may encounter, and the 4-column test bench used by most brands can restore 70% at most. The Han test vehicle will bump on the bench for 45 days and nights, and this test will take three rounds, which is equivalent to Han driving 1 million kilometers on the real vehicle test road, which is more than three times the test volume of most similar vehicles.
Byd Han is doing a 24-lane road simulation test
Of course, there is no shortage of road measurements. Han has also completed the "three highs" test, which not only bears the environmental cabin experimental test of various scenarios with the temperature covering -40℃-80℃, but also uses the team’s self-driving mode to actually test the vehicle performance from Hainan, yakeshi to Turpan and other places, and test the adaptability of charging facilities along the way.
three
Participate in the formulation and promotion of standards.
BYD is not only experienced in building new energy vehicles, but also experienced in testing.
In 2009, BYD e6 completed the first collision of pure electric vehicles in China; In 2011, BYD S6 became the first domestic SUV model in China to obtain the five-star standard. Although it is a fuel vehicle, it has also accumulated experience for new energy vehicles. Later Tang I generation became the first C-NCAP five-star new energy vehicle in China.
S6 opens BYD’s five-star precedent.
Thousands of valuable enterprise standards have been accumulated since the establishment of BYD Safety Testing Center. BYD is also actively involved in promoting the gradual improvement of relevant national safety regulations and standards. It is predicted that in 2022, China’s automobile safety standards will become the most stringent standards in the world.
In addition to safety standards, BYD has also participated in the drafting and formulation of a number of relevant national laws and regulations. For example, BYD participated in EVS-GTR (Global Technical Regulations on Electric Vehicle Safety). EVS-GTR was jointly formulated by China, the United States, the European Union and Japan, and BYD was the leader of TF8 (Commercial Vehicle Working Group) in the formulation of this regulation. At the 174th meeting of the United Nations World Vehicle Coordination Forum (WP29), the final standard was voted by the parties to the 1998 Agreement and passed unanimously. This is the first global technical regulation that China participated in as the main lead country.
Byd Han became the only domestic medium-sized and large C-class car with a monthly sales of over 10,000 yuan.
Since the launch of BYD Han, three benchmarks have been erected, one of which is the safety benchmark, represented by BYD blade battery. Judging from the development and testing process of BYD Han, BYD is not only the owner and leader of Sandian technology, but also honed the development and testing process of new energy vehicles and established its own moat before the industry. Byd Han’s safety is not just a blade battery.
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