BYD blade battery is an innovative battery technology introduced by BYD company, which has a number of significant advantages and features. The following is a detailed analysis of the blade battery:
advantage of BYD blade battery ：
• High safety : The BYD blade battery is made of lithium iron phosphate cathode material, which has high temperature resistance and can effectively prevent thermal runaway under extreme conditions. Its unique “honeycomb” structural design helps to disperse heat quickly, further reducing the risk of thermal runaway 1. In acupuncture tests, blade batteries performed particularly well, far better than conventional batteries 1.
•High energy density and long battery life : Through innovative structural design and the application of new chemical materials, BYD blade batteries achieve a high energy density, thereby improving the driving range of new energy vehicles. Compared with traditional lithium iron phosphate batteries, blade batteries have a significant increase in energy density, and the driving range can be increased by more than 50% 23.
• Long life and low attenuation : BYD blade battery cycle life is long, after a lot of tests and verification, its life can reach more than twice the traditional ternary lithium battery. This means that blade batteries have a low decay rate during long-term use and can maintain high performance stability 1.
•Cost advantage and environmental protection : BYD blade battery further reduces the cost through modular structure design and efficient production process, and promotes the popularization and promotion of new energy vehicles. At the same time, the blade battery material can be recycled with high utilization rate, which helps to reduce environmental pollution and resource waste .
•High space utilization and lightweight design : The flat design of the blade battery enables the battery pack to make more efficient use of the vehicle chassis space. This design not only improves space utilization, but also reduces the overall weight of the battery, helping to reduce energy consumption and improve vehicle performance.
Technical features of BYD blade batteries ：
The BYD blade battery adopts the CTP (Cell To Pack) design concept. The battery cells are directly installed in the battery pack shell as arrays, eliminating the need to assemble the battery cells into modules . This design can maintain the strength of the battery pack, without the cross beam, longitudinal beam and various bolts and other accessories, so as to improve the space utilization inside the battery pack housing, to achieve the total capacity of the battery pack and energy density. The shape of the blade battery is a flat rectangle, which not only improves the heat dissipation effect, but also demonstrates its high safety and strength through needle tests and heavy truck rolling tests.
Production technology
BYD Blade battery adopts lamination process. Compared with traditional winding process, lamination process has better performance in internal resistance, internal temperature consistency and internal stress. The blade battery cell length is 960mm, the thickness is 13.5mm, and the height is 90mm. In the production process, BYD carried out a dust-free design on the workshop, and the key processes reached the hundred-level standard to ensure the cleanliness of the production environment. The coating process supports a maximum width of 130cm, and the rolling process ensures a consistent electrode thickness and a lamination speed of 0.3 seconds per piece, the highest in the industry. In addition, BYD has independently developed pressurized liquid injection technology for the space capsule to ensure full injection of electrolyte.
Energy density and driving range
The energy density of the BYD blade battery is 50% higher than that of the traditional iron lithium battery, making the single-motor version and dual-motor version of the driving range of 605 km and 600 km, respectively. The blade battery design increases space utilization from 40% to 60%, and is expected to increase vehicle battery life by 20% to 50%. Byd plans to increase the energy density of the single unit to 180wh/kg and the system energy density to 160wh/kg in the next two years, which will further enhance the performance and competitiveness of electric vehicles.
Safety and longevity
The BYD blade battery passed the needle test and the heavy truck rolling test, demonstrating its high safety and strength. Its design allows for a large heat dissipation area and a long internal loop, reducing the risk of temperature rise. The lithium iron phosphate anode material has a low risk of thermal runaway, and the possibility of internal pressure increase and temperature increase is small, thus avoiding explosion and combustion. The blade battery is designed to last up to 8 years and more than 1.2 million kilometers, meeting the needs of the full life cycle of the vehicle.
