In recent years, various technological innovations in the power battery industry have emerged, such as blade batteries, Kirin batteries, 4680 batteries, and short knife batteries. Following technologies such as pouch large module battery integration and 800VTC overcharge and overvoltage, Farasis has now launched the "SPS battery" with high technical performance.
On September 9, one of the top 15 power battery companies Farasis officially launched a new power battery solution - SPS (Super Pouch Solution) in Beijing. Propose a complete set of innovative solutions from cells to systems, from manufacturing to recycling, and create new products that meet user needs in terms of cruising range, charging efficiency, cost reduction and efficiency enhancement, and adaptation of models. Farasis' SPS is not just a simple system structure design innovation, but integrates four major innovative technologies: large pouch cells, large pouch battery systems, large pouch battery manufacturing and direct recycling.
1. 75% volume utilization ratio
According to reports, the Farasis SPS, which adopts the horizontal arrangement of large soft-packed cells, reduces the battery system components by 50%, reduces the material cost by 33%, and improves the volume utilization rate to 75%. Compared with models equipped with 4680 cylindrical batteries, the Farasis SPS has a 12% higher volume utilization rate, 3 times the cycle life, and a 60% increase in thermal conductivity.
In contrast, publicly available data shows that the volume utilization rate of Tesla 4680 batteries is 63%, while the volume utilization rate of CATL Kirin batteries exceeds 72%. It is worth noting that the Farasis SPS has changed the design of the multi-cell series connection of the previous generation power battery system, thereby simplifying the structure of the battery system. At the same time, it has a charge and discharge rate from 2.4C to 5C or even higher. The semi-solid electrolyte is used to reduce the amount of liquid electrolyte and improve the intrinsic safety of the cell.
2. Compatible with various material systems
Not only that, the SPS battery will also catch up various materials. Thanks to the high compatibility with the material system, Farasis large pouch cells can be used in material systems such as high-nickel ternary to low-nickel lithium-rich manganese, lithium manganese iron phosphate, and sodium ions. It is well known in the industry that Farasis has long been known for its ternary soft pack batteries. It is understood that Farasis has currently mass-produced ternary cell products with an energy density of 285Wh/kg, and has developed and verified 330Wh/kg high-energy density semi-solid batteries.
From a horizontal perspective, Farasis' 330Wh/kg high-energy-density cell technology is more than 25% higher in energy density than conventional high-energy cells in the industry. Farasis has invested heavily in technological innovation and continued to promote the iterative research and development of high-nickel ternary. The power battery with an energy density of 330Wh/kg has been sent to customers and received good feedback. The medium-nickel high-voltage products will continue to be shipped in 2021. The products are cost-effective, and Farasis will continue to use this product as a sample to develop new customers.
At this conference, Farasis also demonstrated its R&D route outside the ternary material system for the first time. Na-ion batteries, lithium iron phosphate, lithium iron manganese phosphate, etc. plan to launch the first generation of products in 2023. The goal is to increase the energy density of sodium-ion batteries for sale from 160Wh/kg to 220Wh/kg by 2030, and the energy density of lithium iron phosphate and lithium iron manganese phosphate form a product coverage from 200Wh/kg to 240Wh/kg. In terms of low nickel, Farasis plans to launch 250Wh/kg of low-nickel and manganese-rich system products in 2024, which is expected to be further increased to 290Wh/kg in 2030.
3. NO TP
In terms of temperature control, it is reported that the composite use of high-efficiency liquid-cooling plates and heat-conducting sheets of the SPS system provides double-sided liquid cooling and three-sided heat transfer for large pouch cells. Accurate and comprehensive temperature control allows the battery system cycle life to exceed 3,000 times. A variety of materials form 6-sided protection for the large pouch cells, coupled with the design of efficient exhaust channels and heat exchange capabilities.
The SPS large pouch battery system is equipped with 8 series or higher nickel content cells, which can still achieve the thermorunaway non-proliferation (NO TP) of the single cell. In low temperature performance, SPS performance is also quite outstanding. According to reports, the full-electrode and lamination process of the large pouch battery brings lower internal resistance and better low-temperature discharge performance to the battery.
The addition of liquid cold plates and nano-insulation materials balances the internal temperature of the battery system . In order to meet the normal charging in extremely cold conditions, SPS applies a new low-temperature fast self-heating design. The experimental data shows that in the environment of minus 20 degrees Celsius, the capacity of the SPS system remains above 90%, and the charging time is shortened by half.
4. Fast charge for 10 minutes, suitable for all passenger vehicles
In terms of charging, industry professionals said that in view of the power conditions of 300-350kW of fast charging piles in the future, SPS will pack large pouch cells with different charging rates. The unified configuration of "charging for 10 minutes, cruising range of 400 kilometers" has been realized to meet the travel and energy replenishment needs of various users. Farasis displayed three kinds of fast charging cores, 2.4C, 3C and 4C, corresponding to 150kWh, 100kWh and 75kWh of charge, and corresponding to cruising range of 1000km, 800km and 600km.
Charging for 10 minutes can replenish 40%, 50% and 70% of energy, and achieve cruising range of 400km, 400km and 420km respectively. On the basis of the successful development of the large pouch battery, the SPS large pouch battery system can adopt the integrated design of the high-efficiency liquid cooling plate and the chassis, and the large soft-pack battery can be directly integrated into the system chassis. Under the condition of keeping the chassis size of the battery system unchanged, the Farasis SPS can flexibly adjust the chassis height of the battery system by adjusting the thickness of the large pouch cells arranged horizontally.
On the manufacturing side, large pouch cells reduce equipment investment by 50%, plant area by 60%, and manufacturing energy consumption and cost by 35% and 30%, respectively. Farasis has developed and verified the direct recycling technology of lithium batteries for more than 10 years, which can retain the crystal structure of the cathode material and reuse it, and increase the material utilization rate to more than 99%.