Method for improving density of lithium iron phosphate battery

Abstract

The invention discloses a method for improving the density of a lithium iron phosphate battery, belonging to the field of manufacturing of high lithium iron phosphate batteries. The method comprises the steps of manufacturing of a positive electrode of the battery, manufacturing of a negative electrode of the battery, manufacturing of an electrolyte, manufacturing of a metal shell, and packaging. During packaging, hot air is used for hot shrinkage of an insulating film, so the insulating film is tightly attached to the inner surface of the metal shell; then, the positive electrode of the battery, the electrolyte and the negative electrode of the battery are sequentially installed, and packaging is completed; the positive plate, the negative plate, the insulating film and the shell of the lithium iron phosphate battery are connected into a whole, so the capacity of the battery can be improved; and thermal shrinkage film coating is conducted from the interior, so film coating effect is good, wrinkles do not exist, and bubbles can be reduced. Moreover, operation in the invention is simple and convenient.

Description

technical field [0001] The invention relates to the field of manufacturing high-quality lithium iron phosphate batteries, in particular to a method for increasing the density of lithium iron phosphate batteries. Background technique [0002] Existing lithium batteries generally have technical defects such as low energy density and short service life, which seriously affect the performance and further popularization and application of lithium batteries; [0003] The performance of lithium iron phosphate batteries mainly depends on the electrode active materials. Lithium iron phosphate materials have good cycle performance and high safety, but low specific energy and conductivity. Defects in electrode active materials have severely restricted the development of lithium iron phosphate batteries, making the performance of existing lithium iron phosphate batteries in terms of energy density, capacity, and cycle life no longer able to meet the development needs of electrical equip...

AI Technical Summary

Problems solved by technology

[0002] Existing lithium batteries generally have technical defects such as low energy density and short service life, which seriously affect the performance and further popularization and application of lithium batteries;

[0003] The performance of lithium iron phosphate batteries mainly depends on the electrode active materials. Lithium iron phosphate materials have good cycle performance and high safety, but low specific energy and conductivity

Defects in electrode active materials have severely restricted the development of lithium iron phosphate batteries, making the performance of existing lithium iron phosphate batteries in terms of energy density, capacity, and cycle life no longer able to meet the development needs of electrical equipment

[0004] Another point is the selection of the shell. The plastic shell is not as good as the aluminum shell, but the aluminum shell needs to be insulated. The existing method of insulation is very troublesome.

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