"LBS lying cell ultra-thin flat Rubik's Cube battery, Europe's most stringent five-star safety standards and environmental protection standards, 5.3-meter turning radius, 490mm center of mass height, front and rear axle load ratio 50:50, 3.8 seconds zero-to-100 acceleration electric speed Steel gun.”
html On June 13, SAIC MG’s first truly global car was named Mulan “MULAN” and entered the global market.
“Use intelligent driving to return cars to their original intention of pursuing freedom, use intelligent experience to break through the imaginary boundaries of automotive scenes, continue to evolve, and become digital life forms, achieve diverse co-creation in the excitement of virtuality and reality, and become a social node in the new world. .”
On June 14, Zhiji Auto, which has already started delivery of Zhiji L7, proposed five standards to define smart cars in the new world.
"Visually enhanced AR-HUD head-up system, 43-inch wide triple screen Trinity multi-dimensional sensory interactive smart cabin, LUMINAR laser radar, PREMIUM 4D imaging radar and other 33 perception hardware create an immersive and scene-based extremely intelligent experience for users.
In the second half of the year, SAIC Group 's other smart electric vehicle product Feifan R7 will also be launched and delivered.
It comes from an enabling technology base that can be expanded to multiple product architectures
What is SAIC Nebula?
You? You may be relatively unfamiliar with SAIC Nebula, but you must have heard of Toyota Motor's TNGA, Volkswagen's MEB and SSP, and General Motors' Ultium. TNGA is a systematic platform in the era of fuel vehicles. On the road to pure electric vehicles, its revolution is not thorough enough.
Volkswagen MEB is just a product architecture, not a systematic thinking. A more advanced systematic SSP platform must be developed. The first product will not be unveiled until 2026, and it will also take into account the dual needs of mechatronics and pure electric vehicles.
SAIC Nebula is most similar to General Motors' Ultium, and is also a pure electric exclusive platform. According to the technical data, SAIC Nebula covers more functional modules, has more application combinations, has better performance, and is more forward-looking. Lu Yong, executive vice president of SAIC Innovation Research and Development Institute, said that in the future,
will follow the trend of new technologies. The penetration rate of energy vehicles continues to rise, and pure electric vehicles are also beginning to expand into market segments. Therefore, SAIC Group believes that it is the right time to launch a pure electric exclusive platform at this point in time.
"In the past, pure electric products were single. Without sufficient sales support, building a platform is not a reasonable choice. The electric vehicle market from 2022 to 2025 is a market that will rise sharply. It is expected that by 2023, SAIC Group's four brands will launch at least 16 pure electric products. " Kang Huaping, Vice President of SAIC Innovation Research and Development Institute, said.
The creation of SAIC Nebula benefited from SAIC Group's accumulation in pure electric and platform architecture development.
Automotive Business Review learned that SAIC Group began to develop pure electric vehicles in 2011
In 2018, SAIC Roewe launched the high-performance electric vehicle Marvel It won the annual award for the first time as an electric vehicle.
The judges of the Xuanyuan Award praised it for "having a world-class electric vehicle control experience; its highly integrated three-electric design fully reflects the company's outstanding engineering capabilities; The performance is stable in terms of comprehensive energy efficiency, cruising range, and fast and slow charging performance. "
It can be said that this product became the double benchmark for performance and energy consumption in the electric vehicle market at that time.
In terms of architecture development, SAIC Group started very early.
In 2010, SAIC Group started benchmarking against Volkswagen. The development of MQB architecture, the representative models developed include SAIC Roewe 550 and SAIC MG6.
In 2015, SAIC Motor started the development of its second-generation architecture and made a comprehensive transition towards electric drive. The upcoming third-generation SAIC Roewe RX5 is born out of SAIC's latest "Everest" mechatronics architecture.
"Through two generations of architecture development and two generations of pure electric vehicle development, we have accumulated a lot of development experience and data. We have a deeper understanding and knowledge of pure electric architecture and pure electric exclusiveness. So we are At the same time as the development of Marvel
At the first phase of the 2022 "Smart Coffee Exchange" held by SAIC Group on June 24, SAIC Group proposed that the Nebula platform will be the carrier of SAIC's electrification and the carrier of SAIC's cloud-pipe-end technology. Every data will run on On the cloud, through big data calculations, cars can continuously iterate themselves to meet the needs of thousands of users. This is where the name Nebula comes from.
At the same time, SAIC Nebula is SAIC's "software-defined car, data-determined experience" platform, laying a solid foundation for SAIC to achieve carbon peak in 2025, and working with SAIC to "lead green technology and pursue dreams of wonderful travel" The new vision and mission are highly consistent.
Everything revolves around value gradient
Automotive Business Review learned that the systematic core of the Nebula platform is reflected in the gradient of its high-value modules.
"Based on this gradient, we can derive different levels of pure electric architecture, and a series of products with performance gradient, intelligence gradient and cost gradient." Kang Pinghua said.
The first is the battery module. SAIC Nebula platform applies CTP technology, covering lithium iron phosphate , ternary lithium, semi-solid and other chemical systems. The 44-150kWh ultra-wide energy matrix achieves both energy gradient and cost. gradient. In terms of battery size,
can support gradient combinations of one width, two lengths, and three heights, fully covering the requirements of different models.
For example, a 110-meter-thick battery module can well support the low-height requirements of sports cars (MG Cyberster) and coupes; a 125-meter-thick battery can well adapt to the battery life requirements of products with a slightly higher vehicle height; and a battery module with a power of more than 100kWh Battery modules can effectively support the development of 7-seater vehicles.
In terms of energy replenishment method, SAIC Nebula platform has also achieved gradient compatibility. It can not only support 800V fast charging, achieve a range of 200 kilometers in 5 minutes of charging, and achieve 80% battery recharge in 15 minutes, but also support 400V fast charging, that is, 5 It can last for 100 kilometers in 30 minutes, charge the battery to 80% in 30 minutes, and also supports a quick-swap mode that can fully recharge in 2-3 minutes.
electric drive module, SAIC Nebula platform supports two voltage platforms.
On the 400V voltage platform, the three electric axes A, B, and C of 150kW, 180 kW, and 250 kW can be freely matched or used alone. On the 800V voltage platform, the output power of the A, B, and C axes reaches 200kW, 350kW, and 400kW respectively. Therefore, for rear-wheel drive models, the brand's optional power bandwidth ranges from 150KW to 400KW; for four-wheel drive models, the brand's optional power bandwidth ranges from 330KW to 600KW. The
chassis module supports high and low roof models from A to D levels.
Two front suspension modules: MacPherson and double wishbone, configurable air spring and CDC; two rear suspension modules: five-link suitable for wide and narrow track, configurable air spring and rear wheel steering; Steel and aluminum subframe are optional; two steering modules: BD for large vehicles; DP for medium and large vehicles.
"We integrated the suspension and drive modules to shrink the main modules into the suspension, and then used technologies such as lengthening the wheelbase, compressing the front and rear suspension and air conditioning to give some space to the occupants and give more space to the passengers. The space is given to the flat battery. Therefore, within the same vehicle length, we have left enough space for the comfort of the passengers and the safety space of the battery module.”
Series models of the Nebula platform are more than 200mm longer than the fuel vehicle platform at the same length. The wheelbase width is 2690-3100mm, and the ultra-short front and rear overhangs can be within 800mm.The ultra-long wheelbase can be equipped with a 2023mm long battery series, thus achieving an ultra-long battery life of 1,000 kilometers.
The underlying capabilities and user experience
The gradient of high-value modules demonstrates the flexibility and efficiency of SAIC Nebula. As a platform named after systemization, SAIC Nebula also proposes super security, super performance and super intelligence. "Trinity" concept.
According to Automotive Business Review, safety, performance and intelligence are indispensable user experience and competitiveness for new species of smart electric vehicles in the future. The underlying capabilities built by SAIC Nebula in these aspects also mean that it provides consumers with A kind of commitment and technical guarantee.
For example, SAIC Nebula is not only targeted at the domestic market, but also for the global market. Therefore, it is developed based on the world's latest five-star IIHS index excellence in terms of structural safety.
This means that both European consumers and Chinese consumers will enjoy the same structural safety guarantee.
For example, in terms of safety, SAIC Nebula covers battery safety, structural safety, network data security and intelligent active safety.
In terms of battery safety, SAIC's Rubik's Cube battery has L0-level thermal runaway prevention technology, and adopts a combination of patented technologies such as "pre-guided, horizontal, separated, and sparse" to achieve 50-degree high temperature and multi-needle puncture of the Rubik's Cube battery module without heat. out of control.
In terms of structure, SAIC Rubik's Cube adopts 1500Mpa thermoformed thresholds on both sides, and the interior is filled with honeycomb structure multi-cavity high-strength extruded aluminum to effectively protect the battery and achieve electrical and structural safety in 360-degree collisions.
This means that the prevention and control of battery thermal runaway and effective protection of battery collision safety can greatly reduce consumers' doubts about electric vehicle consumption and improve the safety index of travel.
In addition, in addition to battery safety and structural safety, SAIC Nebula is also the first platform to incorporate network data security into its development.
complies with the national standard and United Nations R155 network security regulations, integrates the national secret level two certification trusted chip; complies with the national standard and the United Nations R156 air upgrade regulations, supports security refresh and national secret SM2 digital signature; complies with the national standard and GDPR data security requirements, supports national SM3 hash algorithm and SM4 symmetric encryption; "SAIC Nebula is building an integrated defense system at the four levels of cloud, pipe, edge and terminal, combining software and hardware.
In terms of performance, the SAIC Nebula platform has passed nearly 10,000 tests Topology optimization has formed an integrated design of the multi-ring body structure, battery module structure, and chassis structure. The overall mode of the vehicle body is greater than 50HZ, and the overall maximum is 40000Nm/Deg.
"What is the concept of greater than 40000Nm/Deg? It’s a million-dollar luxury car! "Kang Pinghua said.
has a top-level dynamic chassis, which is designed and tuned according to the characteristics of electric vehicles. The rear five-link hard point setting can effectively compensate for camber and increase the tire contact area during wheel beating. Always optimal; the rear-wheel steering system compensates for oversteer when driving at high speeds, thereby improving high-speed stability and safety.
"The steering ratio of Nebula is from 13.6 to 14.7, while the reference data is 14.7 for MEB. , BMW3 is 14.6; in terms of turning radius, the 3100 wheelbase car based on the Nebula platform is 5.4 meters. In reference data, the BMW 3 is 5.6 meters, and the Volkswagen Golf is 5.45 meters; the lateral acceleration of the Nebula platform reflects the ultimate road-holding performance. Close to 1g. In the reference data, ordinary cars are greater than 0.8g, luxury cars are greater than 0.85g, high-performance cars are greater than 0.9g; racing cars are greater than 1g. "
In the first issue of SAIC Group's 2022 "Zhi Ka Hui" on June 24, SAIC Group's Innovation R&D Institute showed these data on the performance of SAIC Nebula.
Whether it was the continuous drift of the electric car created on the day of the launch of the Zhiji L7 Guinness World Records, or the soon-to-be-launched SAIC MG MULAN, these indicators are being tested and verified by consumers.
In terms of intelligence, “Nebula’s electronic and electrical architecture platform is also gradient to support intelligent needs.We have two major architecture platforms, one is the E2A (CAN-FD) architecture, which can fully support online upgrades, and the other is the Galaxy full-stack system solution. "Kang Pinghua said.
The Nebula platform is loaded with three-level assisted driving, which is also divided into three gradients.
The first gradient is advanced driving assistance, which is an auxiliary driving focused on user safety. Simply put, the scene to be implemented is road When conditions are good, we can perform assisted driving in our own lane to ensure our driving safety.
The second level is high-end intelligent driving, which is mainly about improving the customer experience. The so-called high-end is the need for chip computing power. To increase the speed, we need to introduce artificial intelligence , which realizes automatic acceleration and deceleration and automatic lane changing under structured conditions.
The third gradient is super intelligent driving, which is based on user life scenarios. Based on the application of deep collaboration and data, the scenario is to realize intelligent driving assistance in the face of complex and changing road conditions.
module library and technical architecture
Of course, in addition to the underlying technology displayed by SAIC Nebula and the perception it brings to users. In addition to experience, SAIC Nebula itself has also proposed the concept of iteration.
In other words, the technology and capabilities contained in SAIC Nebula displayed by SAIC today are only its version 1.0
" Solid-state battery integrated technology is already in use. In progress, we will soon see our test verification vehicle to verify its higher energy density, longer service life and safety; we are already in the project approval stage for the integrated die-casting technology; we will see the display of our CTC prototype this year. We have also noticed that the battery module is becoming a structural contributor from a "panda" baby, so we have started research on the CTB application project; the wire-controlled chassis is in a critical stage; scenario-based autonomous driving based on vehicle-road collaboration and data application must be in On the road. "Kang Pinghua said.
At the same time, SAIC Nebula also provides wider technical compatibility and scalability for the four major brands it serves: Zhiji, Feifan, Roewe, and MG. Each brand can use the underlying module to Basically, the corresponding product architecture is developed according to its own product positioning.
Kang Huaping said that as a high-end brand, Zhiji must have high-end exclusive features, so it has done a lot of work on the Nebula platform. Through Zhiji’s own The R&D department has added technologies such as air springs and rear wheel transformation.
"Nebula is a super platform. Its connotation is a gradient module library that can be selected by all brands, and all brands can make requests for combinations. , because my bandwidth can be combined here, I can put forward higher requirements, or I can add some of my own modules to form competitiveness and form my own differentiation. "He said.
Automotive Business Review learned that the core of SAIC Nebula as a systematic platform is a module library of super modules and high-performance modules, and it is managed according to the module library to form a concept of technology shelf. As SAIC Innovation The future responsibility of the Research and Development Institute is to find things that are not on the shelves and fill them up. As long as there is demand from brands and products, they will continue to enrich the shelves and continuously iterate and upgrade what can be produced on the
platform. Che’s complete answer is that they can use this platform to manufacture and produce cars, and they can create certain modules they need to meet the brand’s functions.
“We control more than 70 key modules, and we still have to stop at this. It is necessary to upgrade these modules, eliminate some modules, and add some new modules on the shelves. In this way, the Nebulas super platform can continue to iterate. " Kang Huaping said.
