The advantages of integrated die casting are: weight reduction (weight reduction), cost reduction and increased production efficiency. Therefore, it has become a technology that is currently being adopted by new energy vehicle companies.
Since Tesla first applied it to Model Y in 2020, domestic and foreign vehicle companies, such as: NIO, Xpeng Motors, Li Auto, ZEEKR Automobile, Gaohe Automobile, Celis Automobile (Wenjie),1. Teslamodel yTesla is the pioneer and leader of integrated die casting in the automotive field, and it has cooperated with Italian die casting equipment manufacturer Idra since 2020 to take the lead in adopting the rear floor integrated casting solution on the Model Y, using 6,000 tons of die casting equipmentSubsequently, the front nacelle + rear floor were all integrated die-casting technology, which reduced the number of parts from 171 to 2 and the number of solder joints by more than 1 600With the CTB integration scheme of 4680, the overall weight of the vehicle is reduced by 10%, the parts are reduced by 370, and the cost is reduced by 7%. 
Comparison of Tesla Model Y integrated die castings with the traditional Model 3 solution.
cybertruckThe Cybertruck follows the Model Y's integrated approach of front cabin + rear body floor. 
The Cybertruck's integrated rear floor die-castingFuture scenariosTesla has recently been reported to have a new breakthrough in integrated die-casting technology, that is, from the current three-section structure to further integration of the entire floor. 2. ZEEKR carZEEKR 009ZEEKR in 2021 mass production delivery of its flagship MPV ZEEKR 009, the model boldly uses an integrated die-casting rear end aluminum body, which is also the largest integrated rear body so far mass production, the part is directly die-cast into a rear end aluminum body with large parts at the tail, reducing 80 parts and nearly 800 welding points in the process, increasing production efficiency by 60%, while reducing weight by 16%, reducing deformation by 16%, bending stiffness by 11%, and torsional rigidity by 95%, and its torsional stiffness can reach 36450N·m deg. 
In addition to making the entire rear body into one (different from Tesla's rear body frame, its rear body floor is not integrated), ZEEKR also increases the maintainability of this integrated rear body. 
ZEEKR 009 four-stage collision zone strategy, these four collision zones plus two additional repairable replacement structures, so that the die-cast rear body of ZEEKR 009 can also reduce maintenance costs after a collision. ZEEKR 001 frAt present, the integrated die-casting parts can be divided into the front, middle and rear sections according to the different positions, and the integrated die-casting of the front section and the rear section has been applied to a large extent, but the integrated die-casting of the middle section of the body is rarely mass-produced. The FR version of ZEEKR 001 adopts the integration scheme of the middle section, which is called "integrated die-casting dragonfly structure". 
ZEEKR 001FR integrated dragonfly structure According to the description of ZEEKR, the dragonfly structure can bring the advantages of 7% weight reduction, an average increase of 18% in the stiffness of the seat mounting point, and a 20% increase in production efficiency, in addition to a certain degree of ductility, that is, it is not prepared for a single model, and the wheelbase bandwidth of the adaptable model reaches 206mm. 3. Xpeng MotorsThe mass production application of Xpeng Motors in the field of integrated die-casting is mainly reflected in the Xpeng G6 and X9 MPV vehicles. Xpeng G6Among them, Xpeng G6 adopts front and rear integrated aluminum die-casting body, using a 12,000-ton die-casting machine, and the number of integrated parts of front and rear integrated die-casting is 161, and the integration of parts reduces the weight of the body, which is about 17% lighter than the traditional steel bodyThe torsional rigidity of the vehicle has been greatly increased to 41,600 N·m deg. 
Xpeng G6 front and rear integrated castingsXpeng X9The X9 uses the world's largest die-casting machine with a mass production capacity of 12,000 tons, integrating 167 parts, which is 19% less than the traditional body structure. The collision deformation is reduced by 20%, the bending stiffness is increased by 40%, the overall strength of the rear of the vehicle is increased by more than 30% compared with the traditional design strength, and the torsional rigidity of the vehicle can reach 46000N·m deg. Up to now, it has used 3 die-casting machines of different tonnages to produce different products, specifically: 7000-ton die-casting machine is used to die-cast the front cabin of X9, 12000-ton die-casting is used to die-cast X9 rear floor part and G6 front and rear body parts, 16000-ton die-casting unit is being installed, which will be used to produce battery pack components. 
Xpeng X9 front and rear integrated die castings4. Cialis: M9The M9 is equipped with a large one-piece die-cast rear body and other die-casting parts, and the M9 integrates 222 parts of the body into 10 integrated die-casting parts, reducing the number of parts by 95%.The number of connection points decreased by 1,440, a decrease of 70%, and no specific data has been given on the torsional rigidity of the M9 vehicle. 
M9 integrated die casting5. Li AutomegaLi Auto released its first pure electric model this year, MEGA MPV, which also uses integrated die-casting technology, but Ideal does not use the integrated floor, but only integrates the rear floor skeleton (i.e., split), so it is weak in integration (fewer parts, fewer connection points), and Ideal did not disclose the comparative data in this regard, so that its cost reduction and lightweight in this direction are also relatively weak. 
The torsional stiffness of the Mega integrated die-cast rear floor skeleton is very high, reaching 44,000 Nm/deg。6. NIOet5In December 2021, NIO announced at the ET5 launch event that the ET5 model will adopt the integrated die-casting process, which is NIO's first integrated die-casting model. The results of integrated die casting on ET5 are as follows:
After NIO's ET5 integrated die-casting, the number of body parts is integrated from 54 to one, and the time required for integrated die-casting is reduced by up to 60% compared with the traditional manufacturing processThe resulting structural changes make the overall volume smaller, adding 11L of storage space to the trunk;The one-piece rear floor is about 13 kg lighter;The torsional stiffness of the vehicle has been increased by 10% to 34,000 Nm/deg。Similar to ZEEKR, in order to cope with the problem of aftermarket maintenance, the energy-absorbing structure of the rear half of the rear longitudinal member of the ET5, as well as the vulnerable parts such as the wheel arches, still retain a separate part design. 7. Nezha AutomobileHaozhi skateboard chassisNezha released its latest Haozhi strategy at the Science and Technology Day on August 21 this year, in which a very important technology for the skateboard chassis is integrated die-casting, which is also the integration of the front cabin + the integration of the rear car floor.
Nezha Haozhi skateboard bottom plate Nezha's integrated planning in the future is the entire lower body + side wall inner plate is an integrated casting scheme.
Nezha's integrated die-casting technology planning pathNezha's technical planning path is still relatively radical and bold, and the die-casting equipment has also directly come to die-casting 20,000+ tonnage. 8. Gaohe AutomobileHiphi yHiphi Y's integrated die-casting is 7,200 tons of equipment, and its integrated rear body floor die-casting is jointly developed by HiPhi and the Light Alloy Engineering Center of Shanghai Jiao Tong University, which is called TechcastTM large casting.
Gaohe Automotive TechcastTM large castings9. MiscellaneousIn addition, Changan selected 7,000 tons of die-casting equipment for the integrated die-casting work of the front engine room + rear floor in August this year, and FAW selected 9,000 tons of die-casting equipment, and the integrated die-casting parts were launched in June this yearXiaomi Auto has also installed a Haitian 8800t super die casting machine in the die casting workshop of its Beijing factory. According to reports, in May 2022, Volkswagen's one-piece aluminum die-casting body sample rolled off the assembly line at the Kassel plant, which was produced on a 4 400 t die-casting machine, integrating about 30 parts and reducing weight by about 10 kg. Volvo announced an SEK 20 billion investment to modernize its plant in Toslanda, including integrated die casting technologyToyota Motor has also revealed its integrated die-casting technology, which is scheduled to be launched on the market in 2026, and it is also dividing the future body manufacturing into three parts: front, middle and rear, and the front and rear will be integrated die-casting. 10. Summary and comparison
The general state of this technology market is that after Tesla took the lead in proposing and applying, domestic companies quickly followed up and quickly derived their own solutions, and at the same time, they have been able to keep in line with Tesla in the direction of technological development and lead its mass production. The disadvantage is that the vast majority of car companies are only following up in a single technical field, and have not formed a systematic technical side, so whether they can achieve the established effect, we will observe on the product side.