On March 8, BYD reported that BYD’s CTB (Cell to Body) technology expert evaluation meeting was held at BYD’s global headquarters.
Sun Fengchun, academician of the Chinese Academy of Engineering, and other top experts and scholars from the automotive industry visited BYD to evaluate the CTB battery-body integration technology, deeply experience the first model of CTB technology – BYD Seal, witness the dynamic performance of Seal under the blessing of CTB technology and the safety experiment of side pillar collision, and jointly discuss the innovation and transformation trend of new energy vehicle architecture.
Lian Yubo, executive vice president of BYD Group and president of the Automotive Engineering Research Institute, attended the meeting.
CTB technology has won unanimous praise from academicians, experts and scholars. Academician Sun Fengchun said: “The CTB battery-body integration technology is a systematic innovation in the integrated design of new energy power battery and whole vehicle. It is a beacon for more disruptive technological innovations in the future and plays a leading role in the industry.”
Tapping the potential of blade battery, CTB battery body integration innovation empowers electric vehicle performance to be fully upgraded.
Wu Zhixin, deputy general manager of China Automotive Technology and Research Center Co., Ltd., said: “Seventy to eighty percent of the quality of an electric car depends on the battery.” BYD CTB technology adopts high-safety blade battery. Through the integrated design of the battery body, it breaks the traditional division of parts, and integrates the battery system upper cover and the body floor into one. It has evolved from the past battery sandwich structure to the whole vehicle sandwich structure. Utilizing the advantages of the blade battery as both an energy body and a structural part, it will change the power transmission path of electric vehicles, realize the overall improvement of safety performance, torsional stiffness, and handling performance of electric vehicles, and lead a new trend in the design of electric vehicle architecture.
Zhou Mingdong, an associate professor at the School of Mechanical and Power Engineering at Shanghai Jiao Tong University, explained, “BYD’s CTB technology cleverly utilizes the high safety and high rigidity characteristics of the blade battery, and integrates the battery with the vehicle structure to improve the body’s load-carrying capacity and vehicle safety. It provides a new design idea for the industry.”
Based on the characteristics of electric vehicles, BYD’s CTB technology innovates and develops an exclusive safety framework for electric vehicles to achieve efficient distribution and transmission of collision forces and reduce casualties caused by collision accidents. For the e-platform 3.0 model equipped with CTB technology, the safety of the internal structure of the front bumper car is improved by 50%, and the safety of the inner structure of the side pillar bumper car is improved by 45%.
The CTB technology deeply integrates the battery with the body, greatly improving the torsional stiffness of the vehicle and helping to broaden the upper limit of control.
Guan Xin, dean of the Automotive Research Institute of Jilin University, said after in-depth experience: “The rigidity of the body has been improved, which can ensure that the vehicle’s reaction time is particularly short when driving.”
In 2021, BYD launched e-platform 3.0, which has changed the traditional design methods and design theories, led the industry’s technology development direction through integrated innovation, and helped BYD’s new energy vehicles make breakthroughs in forward-looking technologies.
CTB technology is the latest practice of BYD’s integrated innovation. Through the innovative architecture of deep integration of battery and body, it solves many problems in the design process of electric vehicles, such as the development of electric vehicle collision safety, chassis stability development, and body structure development. It has achieved a comprehensive improvement of the driving experience of electric vehicles and promoted the better and faster popularization of new energy vehicles.