GANZHOU, China, July 20, 2024 /PRNewswire/ -- Farasis Energy
proudly announces the successful testing of its revolutionary
battery cells, marking a significant milestone in the quest for a
million-mile battery—a feat achieved by only a few companies
worldwide.
Achieving a million-mile battery requires cycling the cell over
5000 times, a process that takes 24 to 36 months of accelerated
testing. Farasis Energy has rigorously tested its NCM
chemistry cells, the P75 and P73, to evaluate their cyclic and
calendar aging characteristics. These cells, developed since 2018,
have undergone extensive testing and analysis, leading our
engineers to confidently assert that battery packs using these
cells can last a million miles over 15 years while retaining over
70% of their capacity.
Testing Under Real-World Conditions
The capacity degradation of cells depends on factors such as
cell temperature, depth of discharge, charge rate, discharge rate,
pressure, and storage temperature. Many cells perform well under
industry-standard test conditions (25℃ and C/3 rate), but real-life
conditions are rarely ideal. Farasis Energy's testing incorporated
strenuous usage scenarios, including fast charging (equivalent to
charging a battery from 10% to 80% in around 20 minutes for P75 and
around 30 minutes for P73) and a high depth of discharge of 90% and
above. Tests were conducted at varying temperatures (25 to 35℃)
representative of major automotive markets like the coastal
United States, Western Europe, and China. Additionally, our test fixtures emulate
the variable pressure conditions encountered in real-life battery
packs/modules, ensuring realistic testing conditions.
Advanced Materials and Technology
The long cycle life is achieved through advanced materials and
charging strategies. The separators are coated with semi-solid gel
to reduce the amount of electrolyte while ensuring excellent ion
conductivity and chemical stability. The cathode and anode
materials have excellent stability, and the electrolyte and
electrode interface is optimized for improved performance. The
charging strategy is optimized to reduce lithium plating and heat
generation, effectively suppressing the side reactions that cause
capacity loss.
High Energy Density and Safety Features
Battery packs with these cells not only offer long life but also
high energy density, 20 to 30-minute fast charging, and thermal
propagation mitigation. These cells are currently mass-produced for
high-end passenger cars such as Voyah（the premium arm of
State-owned Dongfeng）and Mercedes-Benz, as well as for commercial
vehicles and other long-life applications. The cells achieve up to
285 Wh/kg energy density, providing an additional range of 300km
for heavy-duty trucks compared to LFP-based battery packs.
Farasis has also developed unique packaging technologies to
ensure safe operation. These technologies mitigate risks associated
with thermal propagation by using a directional exhaust system,
multisided thermal barrier protection for each cell, thermoelectric
separation, and phase change materials to absorb heat during
thermal events. These innovative measures effectively prevent the
spread of thermal propagation, significantly enhancing cell-level
safety.
Commercial Vehicle Applications
While only 1% of consumer vehicles reach 200,000 miles,
commercial vehicles like buses, heavy-duty trucks, frequently
achieve this milestone. Traditionally served by diesel engines,
commercial vehicles can benefit from the lower operating costs of
electric powertrains, which are half that of diesel engines when
considering maintenance and fuel/electricity costs. Long-lasting
battery packs in commercial vehicles provide significant financial
and environmental benefits to operators and the public.
Top players in the electric vehicle takeoff and landing (eVToL)
market have independently evaluated these cells, finding them to
last over 10,000 flight cycles, thus choosing our pouch cells over
cylindrical and prismatic cells.
For more detailed information, please contact us at
sales@farasisenergy.com.cn. Our team is eager to discuss how our
million-mile battery technology can support your upcoming projects
and applications.
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