button battery cr1620.Analysis of the technical advantages of lithium iron phosphate batteries

　　1. Large capacity. The monomer can be made into 5Ah~1000Ah (1Ah=1000mAh), while the 2V lead-acid battery monomer is usually 100Ah~150Ah, with a small variation range. 2. Light weight. The volume of a lithium iron phosphate battery with the same capacity is 2/3 that of a lead-acid battery, and its weight is 1/3 that of the latter. 3. Strong fast charging capability. The starting current of lithium iron phosphate batteries can reach 2C, achieving high-rate charging; the current requirement of lead-acid batteries is generally between 0.1C and 0.2C, which cannot achieve fast charging performance. 4. Environmental protection. Lead-acid batteries contain a large amount of heavy metal - lead, which produces waste liquid, while lithium iron phosphate batteries do not contain any heavy metals and are pollution-free during production and use. 5. High cost performance. Although lead-acid batteries have cheaper materials and lower purchase costs than lithium iron phosphate batteries, they are less economical than lithium iron phosphate batteries in terms of service life and routine maintenance. Practical application results show that the cost performance of lithium iron phosphate batteries is more than 4 times that of lead-acid batteries. Although the application scope of lithium iron phosphate batteries is mainly in the power direction, it can also be extended to more fields in theory. This is determined by the various advantages shown in the above comparison. If the energy density and discharge rate are further improved, It is entirely possible to make some improvements and enter the traditional application fields of other types of lithium-ion batteries. The unique feature of the lithium iron phosphate battery is that it adopts an olive-shaped crystal structure. The crystal is the shape after crystallization, which is divided into ions/molecules/atoms/metal crystals. The ion crystal of the lithium-ion battery is based on the arrangement shape of the ionic compounds in the cathode material. It means, that is, a crystal formed by combining positive and negative ion groups in a certain proportion through ionic bonds. Generally speaking, ionic crystals are brittle and hard, have high melting and boiling points, and can conduct electricity when melted or dissolved. The basis of all lithium-ion battery technology, including lithium iron phosphate battery technology, is ionic conductivity. Most of the internal crystal structures of the positive electrode of lithium-ion batteries adopt a "spinel structure" arrangement. This is true for lithium manganese oxide, lithium cobalt oxide, and ternary lithium batteries. This structure is composed of 8 small cubic units. Spar unit cells (units that make up a crystal, can be literally understood as crystal cells), and the unit cells are combined into an octahedral crystal structure. The olive-shaped crystal structure of lithium iron phosphate batteries is a short cylinder.

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