Production | Automobile Grand View
"In the new energy era, safety is still the most basic and core demand of users. Safety, especially the safety of the battery' big heart', is the primary factor affecting consumers' car purchase decision. "
This is the core view of Chen Hao, assistant general manager of Dongfeng Nissan Automobile Sales Co., Ltd. and general manager of Dongfeng Nissan New Energy Automobile Sales Co., Ltd., at the Beijing Station of Dongfeng Nissan ARIYA's battery technology tasting tour on March 1 day.
Chen Haocun's point of view is also the pain point of the current new energy vehicle market. According to the data released by the National Emergency Management Department, in the first quarter of 2022, there were 640 new energy vehicle fires in China, with an average of 7 new energy vehicle fires every day.
If the number of new energy vehicles at that time is 89 1.5 million, it can be roughly concluded that the fire probability of new energy vehicles is 0.7 per 10,000.
In other words, when the pain point of cruising range has not been completely solved, safety has become a factor for consumers to consider pure electric vehicles.
Just as it is difficult to popularize new energy vehicles because of their endurance, the concentrated investment of a large amount of funds and talents has enabled them to overcome their endurance anxiety in a short time. When security becomes another obstacle, in fact, each family has already launched a new round of "involution".
As an excellent student in battery safety, Dongfeng Nissan ARIYA ARIYA naturally knows the concerns of users and public opinion. Therefore, in this battery technology tasting activity, Dongfeng Nissan decrypted the battery technology of ARIYA ARIYA, and answered the battery questions concerned by users with hard-core technical interpretation.
Full-link independent research and development battery safety control
In the era of fuel vehicles, the engine is the heart of the car. "Dongfeng Nissan's car is good, the key is the engine." This sentence has become a distinctive label of Dongfeng Nissan.
The times are advancing and technology is reviving. "On the new energy track, we hope to set a battery safety benchmark with ultra-safe batteries. When people talk about Dongfeng Nissan pure trams, they can blurt out that' Dongfeng Nissan's new energy vehicles are good, and the key is good battery'. " Chen Haocun said.
Breaking the anxiety of battery safety and guarding the lifeline of users are the technical origins of Dongfeng Nissan. Therefore, for the battery safety issue that users are most concerned about, Dongfeng Nissan chooses to firmly control it from the source of production.
In other words, in order to ensure "good battery core", Dongfeng Nissan chose the road of "insisting on self-research of battery full link" to build an absolute fortress of battery safety with high standards of intelligence and digitalization.
The assembly and production of Dongfeng Nissan ARIYA ARIYA battery is backed by the brand-new Renault-Nissan-Mitsubishi alliance and the top intelligent, green and efficient digital benchmark factory in China-Dongfeng Nissan Wuhan factory.
"Dongfeng Nissan insists on customizing batteries according to Nissan's global high standards. At the same time, it has developed its own battery pack design scheme, independent assembly line production, 100% strict testing and screening to ensure the high safety, long life and high density of the battery, and fully protect the "big heart" of Dongfeng Nissan pure tram and build an absolute fortress of battery safety. " Chen Haocun said.
At the same time, in Dongfeng Nissan's view, "ultra-safe battery technology, intelligent management system, 3D real-time online visual inspection and other layers of protection can ensure the safety of batteries and the quality of products."
The momentum of Hong Chao in that era made everyone in it try to pick up the brush to rewrite the rules of the game. This may also be one of the reasons why Dongfeng Nissan wants to "insist on self-research of battery full link".
After all, the full link autonomy of batteries from R&D to production can not only ensure the supply, price and technical stability of ARIYA batteries, but also ensure that Dongfeng Nissan can always control the manufacturing quality above the high standard car-making level. At the same time, it can also ensure that the best battery pack scheme is customized according to the characteristics of vehicle models and Nissan global standards, and provide users with more direct and convenient battery after-sales maintenance services in the after-sales link.
Perhaps it is based on these considerations that Chen Haosheng gave the answer in an interview: "Dongfeng Nissan chose to do difficult and correct things. In the journey of self-research of battery technology, we have no hesitation."
Combining soft and hard to create the field of battery safety
When the situation changes, you must bow your head and enter the game, and you can rebuild the peak above the peak.
During more than 26 years of research and development, Nissan has established a strict quality system in battery research and development, manufacturing and testing. It turns out that this is an effective system.
The data is the best proof. According to public information, Nissan has an amazing record of "2 1 100 million kilometers battery 0 major safety accident". In other words, from the early days to today's aria, Nissan users never have to worry about the safety of batteries.
The unprecedented safety record of the pure electric vehicle industry has not stopped Nissan in battery technology. Take ARIYA ARIYA as an example. In terms of battery safety technology, the car has reached a new height in the industry.
As a model based on Nissan Cloud Map pure electric platform, ARIYA ARIYA is equipped with Nissan ultra-safe battery architecture. The safety of this battery architecture shows the excellent details and unique technical thinking of Nissan engineers.
Because it is a professional pure electric platform, battery safety has been fully considered at the beginning of vehicle structural design. For example, in terms of waterproof and dustproof, ARIYA ARIYA can let the high-pressure water gun spray continuously in multiple directions and let it stand for a few days. The battery pack functions normally, and there is no dripping phenomenon after the battery pack is disassembled.
In terms of collision safety, ARIYA ARIYA has a nine-fold physical structure protection design. Include passive protection and active protection. In terms of passive battery safety protection, ARIYA ARIYA repairs both inside and outside, building a solid defense line for battery protection. The integrated aluminum battery compartment is equipped with six reinforced aluminum columns and beams, which can improve the compressive strength of the battery pack and protect the internal batteries and modules.
In the battery compartment, the battery cells are produced according to Nissan's global high standards. The double-layer module has a unique double anti-collision bumper, and the wiring harness is accurately standardized and carefully equipped, which creates the first line of defense for passive battery safety protection and stifles the risks of battery short circuit, fire and explosion in the cradle.
The exterior of the battery compartment is made of 1.500 MPa ultra-high strength steel, and the protective reinforced resin chassis armor is fully covered to prevent the battery compartment from being squeezed and deformed, which constitutes the second line of defense for passive battery safety protection, and all-round protection ensures that the battery compartment is intact and inviolable.
Compared with hardware, the battery management system of ARIYA ARIYA BMS is equally excellent. "The system can accurately monitor more than 200 items of data in real time, with the shortest time 10 millisecond, and intelligently adjust the working state of the battery." Chen Haocun said.
In terms of thermal management system, ARIYA adopts liquid thermal management with dry and wet separation, which can accurately control heating and cooling and keep the battery in an efficient working temperature range.
Strict standards are not afraid of any challenges
More and more users are concerned about whether the batteries of new energy vehicles can remain stable under extreme conditions without danger.
So, what is the extreme situation?
The national standard GB 3803 1-2020 "Safety Requirements for Power Batteries for Electric Vehicles" gives a series of rule-based judgment standards. For example, immersion requires that the battery be immersed in water with a specified depth for 30 minutes; In the aspect of alternating temperature shock, it is required to be between -40℃ and 60℃ ...
From the content point of view, the requirements for battery safety in "Safety Requirements for Power Batteries for Electric Vehicles" are already harsh. But for Dongfeng Nissan, the "national standard" is only the bottom line.
"ARIYA ARIYA's battery needs to pass 13 global standard tests, 23 national standard tests and 75 Nissan standard battery pack tests (* * *1/)." Chen Haocun said that the test standards actually implemented by Nissan are much higher than the national standards and EVS-GTR (Global Technical Regulations Working Organization) standards.
It is worth mentioning that Chen Haocun did not exaggerate. For example, vibration test and water immersion test, Dongfeng Nissan adopts long-term water immersion test to evaluate the structural compactness and safety of the battery pack after 36 hours of multi-axial random vibration and 3 hours of sinusoidal fixed-frequency vibration.
In the aspect of alternating temperature impact test, Dongfeng Nissan also implements the standard of -40℃ to 60℃, but the number of cycles is four times that of the national standard.
In addition, in terms of wet-heat cycle, it is 9.6 times that of the national standard; In terms of salt spray test, the cumulative time is three times that of national standard; In the aspect of high-altitude air pressure test, the standard is 1.35 times of the national standard.
Compared with the "harsh" environmental test mentioned above, Dongfeng Nissan's approach is more "rude" in the thermal runaway test. In this experiment, Dongfeng Nissan directly used fire for thermal diffusion test to evaluate the safety of the battery when it was hit by open flame and short circuit and suffered a lot of heat input in a short time.
It is this strict and almost paranoid practice that makes Dongfeng Nissan ARIYA ARIYA's battery successfully pass the triple strict test of China Automobile Center, and the battery safety has been endorsed by authoritative organizations.
Of course, behind the excellent quality of ARIYA battery, it is inseparable from advanced technology and strict quality control process. For example, the introduction of Aplus welding technology and the top gluing automation in China.
It can be said that security will not be the shortcoming of ARIYA ARIYA from the beginning. ARIYA ARIYA's ultimate practice in battery safety has relieved the worries of users and allowed users to turn their perception direction to driving experience.
This may be Chen Hao's confidence when he talked about "guarding the lifeline of users is the insurmountable bottom line of Dongfeng Nissan, which is not a slogan, but the business philosophy of Dongfeng Nissan".
On the new energy track, the glory of the fuel car era has never been a drag. For Nissan or Dongfeng Nissan with "safety, comfort and performance" genes engraved in their blood, building an excellent electric car is just a demonstration of basic skills.
What's more, from 1947 to 2023, Nissan also has 75 years of pure electric technology precipitation and more than 26 years of experience in battery development and manufacturing.
Nowadays, battery safety has become an important embodiment of the brand value of ARIYA ARIYA, and Dongfeng Nissan once again perfectly interprets the brand concept of "people-oriented". Under this concept, ARIYA ARIYA will also redefine the consumption of electric vehicles.
This article comes from the author's automobile view, and the copyright belongs to the author. Please contact the author in any form. The content only represents the author's point of view and has nothing to do with the car reform.