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Apr 08 2025Whether it is a mobile phone, an electric vehicle or an energy storage power station, the shape of lithium batteries is mostly cylindrical or square. These two designs may seem simple, but they actually contain multiple balances of materials science, engineering and manufacturing, and market demand.
1.High level of technical maturity
Cylindrical batteries: Cylindrical lithium-ion batteries, such as the classic 18650 model, were first commercialized by Sony in 1991, and their circular structure is naturally suitable for mechanical automated production. The core winding process is mature, can be manufactured in batches, and the cost advantage is significant.
Prismatic batteries: Prismatic batteries are widely used in consumer electronics, home energy storage, and commercial energy storage, and the manufacturing process has been optimized for many years and the technology is mature.
2.The manufacturing process is simple.
Cylindrical batteries: Wound electrodes are simple and suitable for mass production, and the metal housing is easy to process.
Prismatic batteries: The stacked and wound electrodes are flexible, and the shell is made of metal materials, and the structure is stable.
3.Excellent heat dissipation
Cylindrical battery: The cylindrical battery has high mechanical strength, the curved surface increases the heat dissipation area, the gap between the cells is conducive to air circulation, and the heat dissipation performance is good, which is suitable for high-power applications.Prismatic batteries: Prismatic batteries have high space utilization and high energy density, making them suitable for compact devices.
4.Wide range of application scenarios
Cylindrical batteries: widely used in electric vehicles, power tools, energy storage systems and other fields.
Prismatic batteries: play an important role in consumer electronics, electric vehicles, energy storage systems and other fields.
