Specializing in the technology development, production and sales of high-performance lithium-ion batteries and sodium-ion batteries
What is a lithium battery
Release time:
2024-10-18
Lithium ion batteries refer to secondary batteries (rechargeable batteries) that use lithium as an energy carrier. During charging, lithium ions are released from the positive electrode, pass through the electrolyte and separator, and are embedded in the negative electrode. The opposite process occurs during discharge, also known as rocking chair batteries.
Lithium ion batteries are divided into lithium iron phosphate batteries and ternary lithium batteries according to different positive electrode materials.
Lithium iron phosphate material has abundant production resources, with better cost, cycle life, and thermal stability than ternary materials, making it suitable for commercial vehicles, mid to low end passenger cars, energy storage, and other fields. The theoretical specific capacity (energy density) of ternary lithium batteries is 60% higher than that of lithium iron phosphate, with a higher charging rate and good low-temperature performance, making them suitable for mid to high end passenger cars and other fields.
Lithium ion batteries are divided into square batteries, soft pack batteries, and cylindrical batteries according to different packaging processes.
The advantages of square batteries are high packaging reliability, simple structure, high single cell energy density, high system grouping efficiency, and relatively good stability. The disadvantages are that there are many models, difficult to unify processes, and significant differences in individual cells, resulting in a lower system life than individual cell life.
Soft pack batteries are packaged with aluminum-plastic film, which has the advantages of high energy density, small internal battery pack, and long cycle life. The disadvantages are that high-end aluminum-plastic film relies on imports, low production efficiency, and low yield.
Cylindrical battery hard shell packaging has high reliability, with the advantages of high battery consistency, mature technology, low cost, good product yield and heat dissipation performance. However, the disadvantage is that the heat dissipation design after grouping is difficult, and the system energy density is low.
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