Large cylindrical energy storage lithium battery

Large cylindrical batteries feature a steel casing with 550MPa strength—5.5 times that of prismatic aluminum casings (95MPa). Combined with a 1500MPa dual-layer hot-formed steel bottom design and 3500MPa aerospace-grade fiberglass, they achieve crash energy absorption of 1000J—6.6 times the national standard.

Lithium-ion batteries (LIBs) are a popular energy storage solution due to their high energy and power density, low self-discharge rate and long cycle life . To further reduce both the economic and environmental costs associated with LIBs, there is a strong need to improve the performance efficiency of LIBs throughout their lifetime.

Jiang Jibing, vice president of Eve Energy and head of its battery system research institute, introduced the large cylindrical battery as the “optimal solution” for new energy vehicles (NEVs). He detailed the battery's advantages through three key factors: standardization, adaptability, and structural integrity.

The large cylindrical batteries accommodate multiple chemistries—including lithium iron phosphate (LFP), lithium manganese iron phosphate (LMX), and nickel cobalt manganese lithium (NCM)—providing flexibility in adjusting energy density, range, charging times, and output.

In recent years, large format lithium-ion batteries have been developed for applications such as electric vehicles [,,,, ]. Large format cells have a number of advantages over smaller form factors.

Here, we can see that the manufacturing efficiency of large cylindrical batteries at 300 PPM is 10 times that of prismatic cells, while our manufacturing steps have been further reduced to 10 steps, shortening the production cycle to 7 days.