The comparison between blade battery and Li-ion ternary battery will start from 5 latitudes , including energy density, battery life, safety performance, low-temperature resistance, manufacturing cost, and manufacturing process. Which is better, a blade battery or a Li-ion ternary battery? It's more about the usage requirements.

Lithium ternary has a higher energy density

Blade batteries are lithium iron phosphate batteries, and low energy density has always been a defect of lithium iron phosphate batteries. BYD 's first generation of blade battery has an energy density of 140Wh/kg, while the mainstream lithium ternary battery has an energy density of up to 180Wh/kg, some have been more than 200Wh/kg. For example, Ningde's Ni55 battery energy density of up to 250Wh/kg;

Range close to lithium ternary

Although the energy density is low, the blade battery, through structural and technological innovation, increases the battery pack utilization rate by 50%; that is, in the case of the same volume, more batteries can be installed, thus increasing the capacity of a battery pack and volume energy. Density has increased from 251Wh/L to 320Wh/L. Compared with traditional lithium iron phosphate batteries, battery life is greatly improved. For example, the first to use blade battery, BYD Han, its power battery capacity of 77kWh, NEDC range of up to 605km;
 

Blade battery life is longer

Blade battery life is three times longer than ordinary ternary lithium batteries, charge and discharge cycle life of more than 3,000 times; that is, 3,000 times after the charge and discharge cycle, battery degradation is less than 20%. The charging and discharging times of ternary lithium batteries are generally 2,000 times. BYD claims that the battery life of the blade is eight years and 1.2 million kilometers;

Blade battery is safer

Safety is the biggest advantage of blade batteries. Blade batteries pass the pinprick test. There is no open flame, no smoke after penetration, and the battery surface temperature is only 30~60 degrees. Traditional lithium iron phosphate batteries have no open fire and smoke, and the surface temperature reaches 200~400, while ternary lithium batteries' needle puncture instantly rose to more than 500 degrees and began to burn violently;
 

Blade batteries have worse low-temperature performance

Lithium iron phosphate and lithium ternary batteries have poor low-temperature performance. Still, in contrast, lithium iron phosphate has worse low-temperature resistance. At the same time, the blade battery is lithium iron phosphate, but because of the use of a stacked sheet, low-temperature performance is better than the traditional winding process. Blade battery -20 above the discharge capacity of 60% -70%, the lower limit of low temperature is -20, and lithium ternary batteries up to -30;

Blade battery cost is lower

Before the significant increase in raw materials in 2022, the average cost of the lithium iron phosphate battery industry was 0.6 yuan / Wh, the ternary battery was 0.8 yuan / Wh, and the blade battery cost could be as low as 0.42 yuan / Wh. Ternary lithium battery production costs are high, nickel and cobalt two metal material prices are high, the price fluctuation is big, while the blade battery cost is more controllable. Tesla also plans to purchase blade batteries, which may reduce the cost of the car by 30%;

High manufacturing process requirements

Blade batteries use a stacking process. Compared with the traditional winding process, it has higher space utilization, more flexible dimensions, and higher energy density, but it has higher requirements for the production process and equipment. BYD's blade battery production line has reached the Industry 4.0 level. The production workshop, process, and assembly line are covered with high-precision sensors, and the degree of automation has reached a world-class level. Only in this way can the production quality and production cost of the battery be effectively ensured.
Therefore, if you need high energy density and long-term use of new energy vehicles, you can consider blade batteries; if you need high stability and safety and do not require the high cost of new energy vehicles, you can consider lithium ternary batteries. When choosing batteries, it is also necessary to consider factors such as the manufacturer's quality assurance and after-sales service.

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