Cylindrical lithium batteries are divided into different systems such as lithium iron phosphate, lithium cobalt oxide, lithium manganese oxide, cobalt-manganese hybrid, and ternary materials. The casing is divided into steel casing and polymer casing. Different material systems have different advantages.
I. What is a cylindrical lithium battery?
Cylindrical lithium batteries are classified into different systems, including lithium iron phosphate, lithium cobalt oxide, lithium manganese oxide, cobalt-manganese hybrid, and ternary materials. The casings are available in steel and polymer types, each with its own advantages. Currently, cylindrical lithium iron phosphate batteries with steel casings are the most common. These batteries offer advantages such as high capacity, high output voltage, good charge-discharge cycle performance, stable output voltage, high current discharge capability, stable electrochemical performance, safety, wide operating temperature range, and environmental friendliness. They are widely used in solar lighting, lawn lighting, backup power, power tools, and toy models.
II. Cylindrical Battery Structure
A typical cylindrical battery structure includes: casing, cap, positive electrode, negative electrode, separator, electrolyte, PTC element, gasket, safety valve, etc. Generally, the battery casing is the negative electrode, and the cap is the positive electrode. The battery casing is made of nickel-plated steel.
III. Advantages of Cylindrical Lithium Batteries
Compared with pouch lithium batteries and prismatic lithium batteries, cylindrical lithium batteries have the longest development history, a higher degree of standardization, more mature technology, higher yield rate, and lower cost.
1. Mature production process, low PACK cost, high battery product yield, and good heat dissipation performance.
2. Cylindrical batteries have formed a series of internationally unified standard specifications and models, and the technology is mature and suitable for mass continuous production.
3. A cylinder has a large specific surface area and good heat dissipation.
4. Cylindrical batteries are generally sealed batteries, and there are no maintenance issues during use.
5. The battery casing has high pressure resistance and will not exhibit phenomena such as swelling as seen in square or soft-pack batteries during use.
