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.
The life of BYD blade battery is determined by the number of cycle charges and calendar life.
Cycle charge times:
Byd blade battery cycle charge is about 3,000 times. It should be noted that not every charge counts as a complete cycle, such as from 20% charge to 100%, the next time the same state charge to 100% counts as a complete cycle .
Calendar life and influencing factors:
The official life of the calendar is around 8-12 years, depending on the specific life span
In the use environment and habits:
Loss of power : long-term loss of power will accelerate battery decay.
charging mode : Fast charging mode has greater impact on battery decay than slow charging mode.
Driving mode : Battery decay faster in high-power long-term sport mode than in normal power economy mode .
Performance in actual use:
After more than 3,000 charge and discharge cycles, blade batteries can still consume less than 80% of the original power, demonstrating excellent durability and stability 23. In addition, the blade battery has a single driving range of 500-600 km, with a total driving range of up to 1.2 million km .
Blade battery advantages and features:
Using lithium ferrous phosphate technology, blade batteries have the following advantages:
high safety : thermal runaway temperature of more than 500 degrees Celsius, can effectively resist deformation, extrusion and puncture, reduce the risk of battery internal short circuit .
high energy density : compared with terpolymer lithium batteries, blade batteries have more advantages in energy density, and a single endurance range of up to 500-600 kilometers 2.
strong durability : in the low temperature environment, the battery life of the blade will be affected, the temperature reaches zero, the battery capacity of up to 70%, minus 10 degrees, only 50%.
Conclusion：
BYD blade batteries, with their excellent performance and long life, provide strong support for the development of new energy vehicles.
