Polymer lithium ion battery core outer package forming material

Abstract

The invention provides a polymer lithium ion battery core outer package forming material, and aims at providing a battery core outer package forming material with the advantages that the blocking performance is very high, the cold punching forming performance is good, and puncture resistance, electrolyte resistance stability and organic solvent and high-volatile substance resistance can be realized. An outer resistance layer lamination layer body is formed by at least one layer of heat resistance resin film: any one material from polyethylene glycol terephthalate (PET), biaxially oriented polyamide (BOPA) and polyethylene naphthalate (PEN) or coexistence of two materials from PET, BOPA and PEN through co-extrusion compounding, aluminum foils in a resistance permeation layer lamination body at least comprise 0.9 weight percent to 1.5 weight percent of Fe, a high-resistance layer lamination body comprises a base layer, a function layer and a hot sealing layer, the base layer is a co-polymer film formed by paired compounding or the combination of at least two kinds of film substrates in polystyrene (PP), chlorinated polypropylene (CPP), polyurethane (PE), PET, polyamide (PA) or metaxylylene diamine (MPE) elastic body polymer blends, polyvinyl dichloride (PVDC), ethylene vinyl silane (EVOH), PEN and transpeptidase (GT), and a high-resistance water-resistance modified polyvinyl acetate (PVA) coating film is respectively coated on the co-polymer film substrate. The polymer lithium ion battery core outer package forming material revolutionarily solves the electrolyte resistance stability problem.

Description

technical field [0001] The present invention relates to a battery, especially can be widely used in mobile phones, palmtop computers, laptops, portable military tools, portable video cameras, DVD players, electric vehicles (electric bicycles, motorcycles and automobiles), electric wheelchairs, Composition structure of aluminum-plastic composite soft coating materials for electric cars and electric buses, polymer ion batteries in the field of military and aerospace. In the general term of national packaging (GB4122-83), the definition of flexible packaging is: flexible packaging refers to the packaging in which the shape of the container can change after filling or removing the contents. Various bags, boxes, sleeves, packages, etc. made of paper, aluminum foil, fiber, plastic film and their composites are flexible packaging. Generally, sheet-like plastics with a thickness of less than 0.25 mm are called films. Internationally, the oxygen transmission rate will be less than 3....

AI Technical Summary

Problems solved by technology

Experiments have proved that whether it is lamination with dry coating organic solvent adhesive, wet coating inorganic adhesive lamination, or hot melt coating lamination, the disadvantage of using the same adhesive layer on both sides is that it cannot Effective barrier to the penetration of battery contents

[0034] The disadvantages of the adhesive bonding layer coated with hot melt agent used in the above-mentioned prior art are that it cannot effectively block the penetration of battery contents, and the performance of resistance to strong acid and alkali, high corrosion, organic solvents and highly volatile substances is insufficient. , cannot effectively resist the swelling, dissolution, penetration, absorption and electrochemical reaction of the electrolyte inside the battery