After comparing the CTCs of the three companies, it is found that the zero run is more extreme.

In the context of the accelerated development of the automotive industry towards smart electric vehicles, OEMs and core companies in the supply chain have also stepped up the pace of related technological innovations and iterations.In the field of power batteries, one of the core three-electric technologies forelectric vehicles, in April this year, the first mass-produced CTC battery-chassis integration technology in China, Leapmotor CTC technology, was released; in May, BYD CTB technology was released, combined with the previous special According to the CTC technology released by Sla, under the leadership of these three OEMs, the battery-chassis integration technology has gradually become a trend.

Power battery technology continues to iterate, CTC becomes the focus of development

As one of the three core technologies of new energy vehicles, power batteries have been continuously optimized and improved in recent years in terms of battery life, safety, and space utilization.Gasgoo Automotive Research Institutepointed out in related industry research reports that the current power battery PACK technology has gone through three stages: large module battery pack, CTP battery pack and today's CTC.

Comparing the characteristics of power battery technology at different stages, from the perspective of the number of parts and space utilization, the large module battery pack has the largest number of parts, about 580, so its self-importance is relatively low, and the space utilization rate is relatively low, only 50%; CTP The number of parts in the battery pack is about 470, and the space utilization rate is increased to 60%.In the CTC technology mode, the number of parts is reduced to about 400, and the space utilization rate is further improved to more than 70%.

Taking Leapmotor CTC technology as an example, it reduces the number of parts by 20%, increases the battery layout space by 14.5%, and helps the vehicle achieve a 10% increase in cruising range through optimization of structure, air tightness, process and other aspects. .

It is understood that in the development process of CTC technology, the Leapmotor R&D team has achieved more than 30 key technological breakthroughs in design, verification, process, tooling, etc. Therefore, after enabling products, this technology will also bring new and innovative products to users. user experience.

What are the differences between the CTC technologies of leading new energy vehiclecompanies?

As a future development trend, CTC technology is not unique to Leapmotor. Tesla has released the whole package packaging technology CTC solution in 2020, and BYD has also released a similar CTB battery body integration technology. , What are the differences in the battery-chassis integration technology of the three car companies?

First of all, in terms of integration and assembly, the Tesla CTC solution directly installs the cells or modules on the chassis, the upper cover of the battery pack integrates the floor and seat brackets, and there is no beam in the middle of the front and rear integrated die-casting body chassis. The battery pack structure itself has undergone strong lateral mechanical strengthening, the lateral force and bending moment are all borne by the battery pack, and the lateral reserved space is large, filled with foam; similar to Tesla CTC, the BYD CTB scheme The independent battery pack integrates the floor function, but the transverse steel beams that provide lateral strength and torsional rigidity remain on the car instead of being integrated into the battery upper cover, and the reserved space on the side is smaller than that of the Tesla CTC solution; zero-run CTC The solution is to integrate the battery directly on the chassis, and use the body parts to seal the battery. There is no traditional battery pack concept, and the battery and the chassis are integrated. The structure is more compact, the integration is higher, and the technology is more advanced. The requirements for the manufacturing process It is also higher, and it also greatly enhances the torsional and bending stiffness of the body, while reducing the abnormal noise and vibration of the body, and improving the NVH performance of the vehicle.

Secondly, in terms of space utilization, Tesla CTC and BYD CTB technical routes have improved the vertical space of passengers in the car, but due to the reinforcement or buffer design on the upper part of the battery pack, the battery layout space will be reduced under the same boundary conditions.Because there is no independent battery pack in the Leapmotor CTC solution, the vertical space for passengers in the car and the battery layout space are improved.At the same time, the three solutions have an impact on the performance of the car body. Among them, the Tesla CTC technology makes the body structure more rigid and has better heat dissipation; the BYD CTB technology has higher lateral strength and torsional rigidity, and is more detachable, but has a heat dissipation effect. It is not as good as Tesla's CTC solution; the battery lower tray of Leapmotor CTC technology has a closer and stronger connection with the body sill and beam, and forms a highly rigid cavity structure with the body battery compartment, which greatly enhances the torsional and bending stiffness of the body.The stronger the rigidity of the body, the stronger the durability of the body, the handling and safety of the whole vehicle, and at the same time, the abnormal noise and vibration of the body can be reduced, and the NVH performance of the vehicle can be improved.Finally, in terms of maintainability, because the battery pack integrates the floor and seat beam functions in the Tesla CTC solution, it is relatively complicated to maintain. In the solution, the battery is relatively simple to repair. It is only necessary to remove the PACK for maintenance alone, and the possibility of battery replacement is preserved. In the Leaprun CTC solution, the battery tray can be disassembled and repaired separately, which is also more convenient. Leaprun overcomes difficulties and challenges and takes the lead in realizing the Produce.

On the whole,the essential difference between the related technologies of the three car companies lies in the different technical ideas. The Tesla CTC and BYD CTB technologies are essentially based on the expansion of CTP technology, retaining the form of independent battery packs and simplifying the body and battery pack. Structure of integrated components.The essence of Leaprun CTC technology is to remove the concept of battery packs and realize battery-free packs. TheCTC double-frame annular beam structure is applied, and the battery frame structure and the chassis body structure are combined into one, which is both the body chassis structure and the battery structure. , the overall structure efficiency is higher.This is also the biggest difference between Leapmotor CTC and BYD CTB and Tesla CTC, which truly embodies the concept of integrated vehicle architecture.

CTC accelerates the restructuring of the industrial chain, who will have more right to speak in the future?

Analysts from Gasgoo Automotive Research Institute pointed out that although the battery-chassis integration technology routes of the three car companies are slightly different, from the perspective of car companies planning the next generation of products, highly integrated electrification platforms and power battery large modules / no modules , and even the solution application directly integrated into the chassis will become a trend.

Since the CTC solution further deepens the integration of the battery system with the electric vehicle power system and chassis from the perspective of battery system integration, it uses a smaller number of parts and improves production efficiency.Therefore, the industry believes that with the large-scale application of this solution, the division of labor in thenew energy vehicleindustry chain will change.

Guohai Securities pointed out in the relevant research report that the future trend of CTC industry will show the following three aspects: First, OEMs with technological research and development advantages will control more CTC dominance; second, OEMs operating with light assets will be handed over to A third party leads the development of CTC; 3. In the scenario where a third party leads the development of CTC, battery companies and chassis suppliers will compete and cooperate. benefit.

As one of the first echelon car companies in the new car-making force, Leapmotor has a relatively forward-looking CTC solution and will have more dominance in this field in the future.Of course, as a vehicle company that is still in the growth stage, Leapmotor's update and iteration of power batteries is inseparable from the innovative spirit it has always upheld.

Regarding innovation, Zhu Jiangming, chairman of Leapmotor, once proposed: "The innovation of Leapmotor must be based on the difference between electric vehicles and fuel vehicles, rather than blindly innovating." As the core of electric vehicles and fuel vehicles, power batteries One of the differences is that there are many items to be optimized.As early as 2016, Zhu Jiangming took inspiration from the separation of mobile phone batteries into the integration of the fuselage, and he and his team began to develop battery-chassis integration technology.After years of research and development, the Leapmotor CTC solution has been verified by the CTP solution stage and the engineering practice stage, and officially entered the mass production stage this year. The Leapmotor C01 is the world's first electric car equipped with CTC technology without a battery pack.

In terms of research and development, Leapmotor has always adhered to the global self-research of core components. According to industry analysts, the release and mass production of Leapmotor's CTC technology not only represents the highest level of Leapmotor's global self-research in the past seven years, but will also promote global power The battery is accelerating towards the 3.0 era.