Cylindrical lithium battery energy storage solution

Cylindrical lithium-ion battery cells are a type of rechargeable battery commonly used in a wide range of electronic devices, electric vehicles, and energy storage systems. They are characterized by their cylindrical shape, standardized sizes, and high energy density, making them versatile and suitable for various applications.

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.

The importance of cylindrical batteries is only growing because they are used widely from small electronic devices to EVs. In line with the trend, LG Energy Solution has continued researching and developing cylindrical batteries to improve their capacity and performance.

Conclusions A distributed 3D coupled electro-thermal equivalent circuit network (ECN) model of cylindrical lithium-ion batteries is used to study the effect of cell design and cooling approach on performance. Multiple tab configurations and thermal management approaches are considered for 2170 and 4680 cells.