Fast chargeable lithium iron phosphate polymer lithium ion battery with ultra-high magnifications and manufacturing method thereof

Abstract

The invention relates to a fast chargeable lithium iron phosphate polymer lithium ion battery with ultra-high magnifications and a manufacturing method thereof. A fast chargeable lithium iron phosphate polymer lithium ion battery with ultra-high magnifications does not exist in nowadays. The fast chargeable lithium iron phosphate polymer lithium ion battery with ultra-high magnifications comprisesa positive electrode sheet, a negative electrode sheet, an isolation film and a polyethylene-aluminium compound film, and is characterized in that the positive electrode sheet is made of an positiveelectrode current collector and a positive electrode slurry, the positive electrode slurry comprises the following components by weight percent: 88%-93% of lithium iron phosphate, 0.2%-2.5% of conductive graphite, 1%-5% of carbon nanofibre, 0.1%-0.4% of dispersant and 3.8%-6% of polyvinylidene fluoride; the dispersant is a non-ion surfactant, the solid content of the slurry is 46%-52%, the slurryis uniformly distributed on the upper surface and the lower surface of the positive electrode current collector, and the surface density of the slurry is 15-20 mg / cm<2>. The invention has reasonable structure, stable performance, long service life and functions of the fast charging and the ultra-high magnification.

Description

technical field

[0001] The invention relates to a lithium ion battery and a preparation method, in particular to a fast-chargeable ultra-high rate lithium iron phosphate lithium polymer lithium ion battery and a preparation method. Background technique

[0002] Nowadays, batteries widely used in high-rate power products such as electric tools and automobile starting power supplies are still mainly nickel-cadmium, nickel-metal hydride and lead-acid batteries. Both nickel-cadmium and nickel-metal hydride batteries have memory effects, and regular discharge management is necessary. Improper operation will affect the performance of the battery. Therefore, cumbersome discharge management procedures are unavoidable during the use of nickel-cadmium and nickel-metal hydride batteries. Yes, this increases the workload during battery use. However, nickel-cadmium batteries and lead-acid batteries are heavy pollution processes from raw materials, production processes to waste recycling...

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