CN113895774B - Lithium battery express delivery transport packaging box and production method thereof - Google Patents

Lithium battery express delivery transport packaging box and production method thereof Download PDF

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Publication number
CN113895774B
CN113895774B CN202111251815.3A CN202111251815A CN113895774B CN 113895774 B CN113895774 B CN 113895774B CN 202111251815 A CN202111251815 A CN 202111251815A CN 113895774 B CN113895774 B CN 113895774B
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flame
retardant
layer
lithium battery
light
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CN113895774A (en
Inventor
周光远
王宏标
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Jiangsu Zhongke Polymer New Material Industry Technology Research Institute Co ltd
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Jiangsu Zhongke Polymer New Material Industry Technology Research Institute Co ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/34—Coverings or external coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/046—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B32B2439/46—Bags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention provides a lithium battery transport packaging box, wherein a box body material of the transport packaging box is provided with a composite layer structure; the composite layer structure comprises a blocking flame-retardant metal inner layer, a flame-retardant middle layer compounded on the blocking flame-retardant metal inner layer and a light flame-retardant outer layer compounded on the flame-retardant middle layer. The invention adopts a specific structure and material selection, has excellent flame retardant property, isolation property, good energy absorption and vibration reduction property and the like, is a light and safe lithium battery express packaging box, and can effectively solve the potential safety hazard problem existing in the current lithium battery express process. And the production process is simple, and is suitable for large-scale production and popularization.

Description

Lithium battery express delivery transport packaging box and production method thereof
Technical Field
The invention belongs to the technical field of lithium battery express packaging, relates to a lithium battery transport packaging box and a production method thereof, and particularly relates to a lithium battery express transport packaging box and a production method thereof.
Background
The lithium battery is a new energy product which is developed rapidly in recent years, has small volume and large electric quantity, is used as clean energy, and is widely applied to the fields of mobile phones, computers, robots and automobiles, and a plurality of electronic and electric appliances are covered.
Along with the popularization of electronic products, the application range of the lithium battery is continuously expanded, so that the external operation amount of the lithium battery is high. However, lithium batteries are extremely flammable, high in energy, unstable in chemical composition, and may explode once damaged, belonging to the ninth category of dangerous goods. So large logistics enterprises and customs in various countries have established strict transportation rules for such products. The lithium battery is forbidden to be carried by the civil aviation passenger plane from day 4 and 1 of 2016, and the change has a relatively large influence on the transportation of the lithium battery by manufacturers, so that the transportation difficulty and the cost of the lithium battery are increased.
With the popularization of the internet, online shopping becomes a novel shopping form. The demand for online lithium batteries is also gradually increasing. But is limited by express transportation of lithium batteries, and has not yet been developed on a large scale.
Therefore, how to develop a packaging box suitable for express transportation of lithium batteries can reduce the transportation risk of lithium ion batteries and solve the problem existing in transportation, and the packaging box is one of the problems to be solved by domestic production enterprises and first-line researchers.
Disclosure of Invention
In view of the above, the technical problem to be solved by the invention is to provide a lithium battery transportation packaging box and a production method thereof. The lithium battery transportation packaging box provided by the invention has the characteristics of flame retardance, isolation, good energy absorption and vibration reduction performance and the like, is a light and safe lithium battery express packaging box, and can effectively solve the potential safety hazard problem existing in the current lithium battery express process. And the production process is simple, and is suitable for large-scale production and popularization.
The invention provides a lithium battery transport packaging box, wherein a box body material of the transport packaging box is provided with a composite layer structure;
the composite layer structure comprises a blocking flame-retardant metal inner layer, a flame-retardant middle layer compounded on the blocking flame-retardant metal inner layer and a light flame-retardant outer layer compounded on the flame-retardant middle layer.
Preferably, the light flame retardant outer layer comprises a light impact resistant flame retardant outer layer;
the flame-retardant intermediate layer comprises a light high-flame-retardant intermediate layer;
the inner barrier flame-retardant metal layer comprises an inner barrier flame-retardant metal film layer;
the lithium battery transportation packaging box is a light vibration reduction flame retardant lithium battery transportation packaging box.
Preferably, the material of the light flame retardant outer layer comprises a light flame retardant outer layer foam material;
the light flame retardant outer layer foam material comprises a polypropylene foam material;
the material of the flame-retardant intermediate layer comprises a flame-retardant intermediate layer foam material;
the flame retardant interlayer foam material comprises a polyimide foam material.
Preferably, the thickness of the light flame-retardant outer layer is 10-20 mm;
the density of the light flame-retardant outer layer is 15-45 kg/m 3 ；
The oxygen index of the light flame-retardant outer layer is more than or equal to 28%.
Preferably, the thickness of the flame-retardant intermediate layer is 2-5 mm;
the density of the flame-retardant intermediate layer is 80-200 kg/m 3 ；
The oxygen index of the flame-retardant intermediate layer is more than or equal to 32%.
Preferably, the material of the inner layer of the barrier flame-retardant metal comprises aluminum foil;
the aluminum foil comprises O-state aluminum foil;
the thickness of the inner layer of the obstructing flame-retardant metal is 0.01-0.03 mm.
Preferably, an adhesive layer is arranged between the barrier flame-retardant metal inner layer and the flame-retardant intermediate layer and/or between the flame-retardant intermediate layer and the light flame-retardant outer layer;
the adhesive for bonding comprises polyurethane adhesive and/or flexible epoxy resin adhesive;
the dosage of the adhesive is 20-50 g/m 2 ；
The junction of the flame-retardant intermediate layer and the adhesive layer is characterized in that an adhesive is distributed in the cells of the flame-retardant intermediate layer;
the junction of the light flame-retardant outer layer and the adhesive layer is characterized in that adhesive is distributed at the concave part of the light flame-retardant outer layer;
the distributing includes forming a dendritic dispersed network structure.
Preferably, the flame retardant intermediate layer comprises a density-changing flame retardant intermediate layer;
the flame-retardant intermediate layer is formed by bonding a plurality of density foam materials;
the density of the flame-retardant intermediate layer is changed from the inner side to the outer side in a descending way and then in an ascending way;
the inner side density of the flame-retardant intermediate layer is 100-200 kg/m 3 ；
The intermediate density of the flame-retardant intermediate layer is 50-80 kg/m 3 ；
The outer density of the flame-retardant intermediate layer is 100-200 kg/m 3 。
The invention provides a production method of a lithium battery transportation packaging box, which comprises the following steps:
1) Placing the polypropylene foaming beads in a mould, and obtaining a formed structure of the lithium battery transportation packaging box after a steam heating forming process;
bonding the aluminum foil coated with the adhesive with polyimide foam through a dry process compounding process to obtain a composite layer;
2) And (3) bonding one surface of the polyimide foam layer of the composite layer obtained by the steps with the outer surface of the molding structure body to obtain the lithium battery transportation packaging box.
Preferably, the polypropylene expanded beads comprise flame retardant polypropylene expanded beads;
the oxygen index of the flame-retardant polypropylene foaming beads is more than or equal to 28%;
the temperature of the steam heating forming process is 120-130 ℃;
the time of the steam heating forming process is 200-300 s;
the temperature of the dry process compounding process is 50-80 ℃;
the time of the dry process composite process is 300-600 s.
The invention provides a lithium battery transport packaging box, wherein a box body material of the transport packaging box is provided with a composite layer structure; the composite layer structure comprises a blocking flame-retardant metal inner layer, a flame-retardant middle layer compounded on the blocking flame-retardant metal inner layer and a light flame-retardant outer layer compounded on the flame-retardant middle layer. Compared with the prior art, the invention aims at the problem that the existing lithium ion battery has higher risk in the aspect of transportation such as express logistics and the like, but the prior art has a special transportation packaging box for the lithium ion battery, thereby limiting the further development of the lithium ion battery.
The invention creatively designs the lithium battery transportation packaging box, adopts specific structure and material selection, has excellent flame retardant property, isolation property, good energy absorption and vibration reduction property and the like, and is a light and safe lithium battery express packaging box. The lithium battery express packaging box consists of an outer layer, an intermediate layer and an inner layer, wherein the intermediate layer is made of a light high-flame-retardant material, the outer layer is made of a light, shock-resistant and flame-retardant material, and the inner layer is made of a high-barrier and flame-retardant film material. The specific middle layer has excellent flame retardant property, meets the requirement of UL94VO, can form a fire-retardant layer when meeting fire, and inhibits fire spreading. Meanwhile, the compression rebound resilience is good, the permanent compression deformation is small, and the material can be used as a vibration reduction material for reducing vibration damage in the transportation process of lithium batteries. In addition, the paint has the advantages of light weight, good solvent resistance, high and low temperature resistance, heat insulation, heat preservation and the like; the outer layer has good energy absorption and vibration reduction performance, and can reduce the vibration impact of the lithium battery in the transportation process; the inner layer is made of a metal film material with the function of blocking and flame retarding, and the characteristics of light weight are also considered. The lithium battery transportation packaging box provided by the invention can effectively solve the potential safety hazard problem existing in the current lithium battery express process. And the production process is simple, and is suitable for large-scale production and popularization.
Experimental results show that after the express transport packaging box provided by the invention is filled with 5kg of lithium batteries and subjected to drop test according to one corner, three sides and six sides of a height of 750mm, the packaging box is free from obvious damage, and the filled lithium batteries are also free from damage and can be normally used.
Drawings
Fig. 1 is a schematic and simplified sectional structure of a lithium battery transport package box prepared by the invention.
Detailed Description
For a further understanding of the present invention, preferred embodiments of the invention are described below in conjunction with the examples, but it should be understood that these descriptions are merely intended to illustrate further features and advantages of the invention and are not limiting of the invention claims.
All the raw materials of the present invention are not particularly limited in their sources, and may be purchased on the market or prepared according to conventional methods well known to those skilled in the art.
All the raw materials of the present invention are not particularly limited in purity, and the present invention preferably adopts conventional purity used in the field of production of industrial purity or transportation packaging materials.
All raw materials of the invention, the brands and abbreviations of which belong to the conventional brands and abbreviations in the field of the related application are clear and definite, and the person skilled in the art can purchase from the market or prepare by the conventional method according to the brands, abbreviations and the corresponding application.
All processes of the present invention, the abbreviations of which are conventional in the art, are each well-defined in the art of their relevant use, and the skilled artisan will be able to understand the conventional process steps thereof based on the abbreviations.
The invention provides a lithium battery transport packaging box, wherein a box body material of the transport packaging box is provided with a composite layer structure;
the composite layer structure comprises a blocking flame-retardant metal inner layer, a flame-retardant middle layer compounded on the blocking flame-retardant metal inner layer and a light flame-retardant outer layer compounded on the flame-retardant middle layer.
In the present invention, the case preferably refers to wall materials of the case, i.e., respective wall surfaces of the case, including front, rear, left, right, up, down, and the like.
In the invention, the lithium battery transportation packaging box is preferably a light vibration reduction and flame retardation lithium battery transportation packaging box.
In the present invention, the light weight flame retardant outer layer preferably comprises a light weight impact resistant flame retardant outer layer.
In the present invention, the material of the light flame retardant outer layer preferably includes a light flame retardant outer layer foam material. In particular, the lightweight flame retardant outer foam material preferably comprises a polypropylene foam material. Wherein the polypropylene foam is preferably a polypropylene foam having a closed cell structure.
In the present invention, the thickness of the light flame retardant outer layer is preferably 10 to 20mm, more preferably 12 to 18mm, and still more preferably 14 to 16mm.
In the invention, the density of the light flame-retardant outer layer is preferably 15-45 kg/m 3 More preferably 20 to 40kg/m 3 More preferably 25 to 35kg/m 3 。
In the present invention, the oxygen index of the light flame retardant outer layer is preferably 28% or more, more preferably 30% or more, and still more preferably 32% or more.
The outer layer of the flame-retardant polypropylene bead is manufactured by a steam heating forming process through a die. The material has good energy absorption and vibration reduction performance, and can reduce vibration impact of the lithium battery in the transportation process. Specifically, the thickness is preferably 10 to 20mm.
In the present invention, the flame retardant intermediate layer preferably includes a light-weight high flame retardant intermediate layer.
In the present invention, the material of the flame retardant intermediate layer preferably includes a flame retardant intermediate layer foam material. In particular, the flame retardant interlayer foam material preferably comprises a polyimide foam material. Wherein the polyimide foam material is preferably a polyimide foam material having an open-cell structure.
In the present invention, the thickness of the flame retardant intermediate layer is preferably 2 to 5mm, more preferably 2.5 to 4.5mm, and still more preferably 3 to 4mm.
In the present invention, the density of the flame-retardant intermediate layer is preferably 80 to 200kg/m 3 More preferably 100 to 180kg/m 3 More preferably 120 to 160kg/m 3 。
In the present invention, the oxygen index of the flame retardant intermediate layer is preferably 32% or more.
In particular, in the present invention, the flame retardant intermediate layer preferably includes a flame retardant intermediate layer having a density that varies. In particular, the flame retardant intermediate layer is preferably formed by combining a plurality of density foam materials. More specifically, the density of the flame-retardant intermediate layer preferably changes gradually from inside to outside.
Wherein, in the present invention, the inner side density of the flame retardant intermediate layer is preferably 100 to 200kg/m 3 More preferably 120 to 180kg/m 3 More preferably 140 to 160kg/m 3 。
In the present invention, the intermediate density of the flame-retardant intermediate layer is preferably 50 to 80kg/m 3 More preferably 55 to 75kg/m 3 More preferably 60 to 70kg/m 3 。
In the present invention, the outer side density of the flame retardant intermediate layer is preferably 100 to 200kg/m 3 More preferably 120 to 180kg/m 3 More preferably 140 to 160kg/m 3 。
The intermediate layer in the present invention is particularly selected to be made of Polyimide (PI) foam. The PI foam is a polymer foaming material with an imide ring structure on the main chain, has excellent flame retardant property, meets the requirement of UL94VO, can form a fire-retardant layer when meeting fire, and inhibits fire spreading. Meanwhile, the PI foam has good compression rebound resilience and small permanent compression deformation, and can be used as a vibration reduction material for reducing vibration damage in the transportation process of the lithium battery. In addition, the PI foam has the advantages of light weight, good solvent resistance, high and low temperature resistance, heat insulation, heat preservation and the like. In addition, the PI foam density and thickness of the middle layer are moderate in consideration of certain mechanical strength and vibration reduction requirement, and the density is preferably 80-200 kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The thickness is preferably 2 to 5mm.
In the present invention, the inner layer of the barrier flame retardant metal preferably comprises an inner layer of a film of the barrier flame retardant metal. In the invention, the inner layer is a layer of the express packaging box close to the lithium battery.
In the present invention, the material of the inner layer of the barrier flame retardant metal preferably comprises aluminum foil, more specifically, the aluminum foil preferably comprises O-state aluminum foil.
In the present invention, the thickness of the inner layer of the barrier flame retardant metal is preferably 0.01 to 0.03mm, more preferably 0.014 to 0.026mm, and still more preferably 0.018 to 0.022mm.
In the present invention, an adhesive layer is preferably provided between the inner layer of the barrier flame retardant metal and the flame retardant intermediate layer and/or between the flame retardant intermediate layer and the light flame retardant outer layer.
In the present invention, the means of compounding preferably includes bonding.
In the present invention, the adhesive for adhesion preferably includes a polyurethane adhesive and/or a flexible epoxy adhesive, more preferably a polyurethane adhesive or a flexible epoxy adhesive.
In the present invention, the binder is preferably used in an amount of 20 to 50g/m 2 More preferably 25 to 45g/m 2 More preferably 30 to 40g/m 2 。
In the present invention, at the junction of the flame-retardant intermediate layer and the adhesive layer, the adhesive is preferably distributed in the cells of the flame-retardant intermediate layer. The junction of the light flame-retardant outer layer and the adhesive layer is preferably provided with an adhesive in the concave part of the light flame-retardant outer layer. In particular, the distribution preferably comprises forming a dendritic dispersed network structure. In particular, the network structure is more preferably a 3D network structure. The invention also distributes the adhesive in the foam holes and in the depressions of the foam material at the junction with the adhesive layer, the adhesive is distributed in the foam holes and in the depressions in a dendritic manner, a 3D branch-shaped adhesive network can be formed, and after the adhesive network is combined with the foam holes or the foam material body, the impact resistance of the box body can be further improved, and the interlayer bonding strength can be greatly increased.
The invention is especially bonded together between the outer layer and the middle layer and between the middle layer and the inner layer through the polyurethane adhesive or the flexible epoxy resin adhesive with large applicable temperature difference, and the flexibility can bear the alternate test of cold and hot environments in the transportation process. And the amount of binder is preferably 20 to 50 g-m 2 。
The invention provides an express packaging box for lithium batteries, which comprises an outer layer, an intermediate layer and an inner layer. The middle layer is made of light high flame-retardant polyimide foam, the outer layer is made of light, shock-resistant and flame-retardant polypropylene foam material, and the inner layer is high-barrier and flame-retardant aluminum foil. The outer layer, the middle layer and the inner layer are bonded and compounded through polyurethane adhesive or flexible epoxy resin, so that the lithium battery express packaging box is light and safe, and the potential safety hazard problem existing in the existing lithium battery express process can be effectively solved.
The invention also provides a production method of the lithium battery transportation packaging box, which comprises the following steps:
1) Placing the polypropylene foaming beads in a mould, and obtaining a formed structure of the lithium battery transportation packaging box after a steam heating forming process;
bonding the aluminum foil coated with the adhesive with polyimide foam through a dry process compounding process to obtain a composite layer;
2) And (3) bonding one surface of the polyimide foam layer of the composite layer obtained by the steps with the outer surface of the molding structure body to obtain the lithium battery transportation packaging box.
Firstly, placing polypropylene foaming beads in a mould, and obtaining a formed structure of a lithium battery transportation packaging box after a steam heating forming process;
and (3) bonding the aluminum foil coated with the adhesive with polyimide foam through a dry-process compounding process to obtain a composite layer.
In the present invention, the polypropylene expanded beads preferably include flame retardant polypropylene expanded beads.
In the present invention, the oxygen index of the polypropylene expanded beads is preferably 28% or more, more preferably 30% or more, and still more preferably 32% or more.
In the present invention, the flame retardant polypropylene expanded beads are preferably prepared from one or more of phosphorus flame retardants, ammonium polyphosphate, antimony trioxide and aluminum hydroxide. Specifically, the flame-retardant polypropylene expanded beads preferably contain one or more of phosphorus flame retardants, ammonium polyphosphate, antimony trioxide and aluminum hydroxide.
In the present invention, the temperature of the steam heating molding process is preferably 120 to 130 ℃, more preferably 122 to 128 ℃, and still more preferably 124 to 126 ℃.
In the present invention, the time of the steam heating molding process is preferably 200 to 300 seconds, more preferably 220 to 280 seconds, and still more preferably 240 to 260 seconds.
In the present invention, the temperature of the dry-process compounding process is preferably 50 to 80 ℃, more preferably 55 to 75 ℃, and still more preferably 60 to 70 ℃.
In the present invention, the time of the dry-process compounding process is preferably 300 to 600 seconds, more preferably 350 to 550 seconds, and still more preferably 400 to 500 seconds.
And finally, bonding one surface of the polyimide foam layer of the composite layer obtained by the steps with the outer surface of the formed structure body to obtain the lithium battery transportation packaging box.
The invention discloses a complete and refined whole production process, which better ensures the performance of a lithium battery express packaging box, and the production method specifically comprises the following steps:
cutting the polyimide foam into required thickness for later use by using a sponge disc flat cutting machine;
the polypropylene foaming beads are manufactured into the outer layer of the required box through a steam heating forming process by a die;
coating a certain amount of adhesive on the inner layer by adopting a gravure coating mode;
the inner layer coated with the adhesive is combined with the intermediate layer by a dry combination process, and then combined with the outer layer by an adhesive.
Specifically, the formed outer layer box body is bonded with the other side of the middle layer through polyurethane adhesive or flexible epoxy resin adhesive, so that the lithium battery express packaging box is formed.
Referring to fig. 1, fig. 1 is a schematic and simplified sectional structure of a lithium battery transport package prepared according to the present invention. Wherein 1 is an aluminum foil inner layer, 2 is an adhesive layer, 3 is a PI foam middle layer, 4 is an adhesive layer, and 5 is a flame-retardant polypropylene outer layer.
The invention provides a lithium battery transport packaging box, wherein a box body material of the transport packaging box is provided with a composite layer structure; the composite layer structure comprises a blocking flame-retardant metal inner layer, a flame-retardant middle layer compounded on the blocking flame-retardant metal inner layer and a light flame-retardant outer layer compounded on the flame-retardant middle layer. Compared with the prior art, the invention aims at the problem that the existing lithium ion battery has higher risk in the aspect of transportation such as express logistics and the like, but the prior art has a special transportation packaging box for the lithium ion battery, thereby limiting the further development of the lithium ion battery. The invention creatively designs the lithium battery transportation packaging box, adopts specific structure and material selection, has excellent flame retardant property, isolation property, good energy absorption and vibration reduction property and the like, and is a light and safe lithium battery express packaging box. The lithium battery express packaging box consists of an outer layer, an intermediate layer and an inner layer, wherein the intermediate layer is made of a light high-flame-retardant material, the outer layer is made of a light, shock-resistant and flame-retardant material, and the inner layer is made of a high-barrier and flame-retardant film material. The specific middle layer has excellent flame retardant property, meets the requirement of UL94VO, can form a fire-retardant layer when meeting fire, and inhibits fire spreading. Meanwhile, the compression rebound resilience is good, the permanent compression deformation is small, and the material can be used as a vibration reduction material for reducing vibration damage in the transportation process of lithium batteries. In addition, the paint has the advantages of light weight, good solvent resistance, high and low temperature resistance, heat insulation, heat preservation and the like; the outer layer has good energy absorption and vibration reduction performance, and can reduce the vibration impact of the lithium battery in the transportation process; the inner layer is made of a metal film material with the function of blocking and flame retarding, and the characteristics of light weight are also considered. The lithium battery transportation packaging box provided by the invention can effectively solve the potential safety hazard problem existing in the current lithium battery express process. And the production process is simple, and is suitable for large-scale production and popularization.
Experimental results show that after the express transport packaging box provided by the invention is filled with 5kg of lithium batteries and subjected to drop test according to one corner, three sides and six sides of a height of 750mm, the packaging box is free from obvious damage, and the filled lithium batteries are also free from damage and can be normally used.
For further explanation of the present invention, the following detailed description of a lithium battery transportation package and a method for producing the same is provided with reference to examples, but it should be understood that these examples are implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation procedures are given only for further explanation of the features and advantages of the present invention, and not for limitation of the claims of the present invention, and the scope of protection of the present invention is not limited to the following examples.
Example 1
The production process of the battery express packaging box comprises the following steps:
cutting the foam into 3mm for later use by using a sponge disc flat cutter to form a middle layer of the box body;
injecting flame-retardant polypropylene foaming beads into a mold, and preparing a box outer layer with the thickness of 15mm by adopting a steam heating forming process;
coating 30g/m on the inner layer of the box body by adopting a gravure coating mode 2 Is a binder of (a);
compounding the inner layer of the box body coated with the adhesive with the middle layer of the box body through a dry compounding process;
and bonding the formed outer layer of the box body with the other side of the middle layer of the box body through polyurethane adhesive or flexible epoxy resin adhesive to form the lithium battery express packaging box.
Specifically, the density was 80kg/m at a thickness of 1mm 3 The polyimide foam of (2) is respectively adhered on two sides with thickness of 1mm and density of 160kg/m 3 Forming a middle layer of the box body with the thickness of 3mm for standby;
the oxygen index is 28 percent and the density is 30kg/m 3 The polypropylene foaming beads are injected into a mould, and a steam heating forming process (under the process conditions of 120 ℃ and a heating period of 240 s) is adopted to prepare a box outer layer with the thickness of 15 mm;
coating 30g/m on the inner layer of the box body by adopting a gravure coating mode 2 Is a binder of (a);
laminating the inner layer of the box body coated with the adhesive and the middle layer of the box body at 60 ℃ for 420 seconds, and then compounding the two layers;
and bonding the formed outer layer of the box body with the other side of the middle layer of the box body through polyurethane adhesive or flexible epoxy resin adhesive to form the lithium battery express packaging box.
Performance detection is carried out on the light lithium battery express packaging box prepared in the embodiment 1 of the invention.
The density of the lithium battery express packaging box is measured by adopting a GB/T6343 test standard; the impact resistance was measured using the GB/T4857.5 test standard.
The detection result shows that the density of the light lithium battery express packaging box prepared in the embodiment 1 of the invention is only 40kg/m 3 The weight of the packing box is high; after the packaging box filled with 5kg of lithium batteries is subjected to drop test according to one corner, three sides and six sides of the height of 750mm, the packaging box is not damaged obviously, and the lithium batteries are not damaged and can be used normally; excellent impact resistance.
Example 2
The production process of the battery express packaging box comprises the following steps:
cutting the foam into 3mm for later use by using a sponge disc flat cutter to form a middle layer of the box body;
injecting flame-retardant polypropylene foaming beads into a mold, and preparing a box outer layer with the thickness of 16mm by adopting a steam heating forming process;
coating 30g/m on the inner layer of the box body by adopting a gravure coating mode 2 Is a binder of (a);
compounding the inner layer of the box body coated with the adhesive with the middle layer of the box body through a dry compounding process;
and bonding the formed outer layer of the box body with the other side of the middle layer of the box body through polyurethane adhesive or flexible epoxy resin adhesive to form the lithium battery express packaging box.
Specifically, the density was 60kg/m at a thickness of 1mm 3 The polyimide foam of (2) is respectively adhered on two sides with thickness of 1mm and density of 150kg/m 3 Forming a middle layer of the box body with the thickness of 3mm for standby;
oxygen index of 28% and density of 35kg/m 3 The polypropylene foaming beads are injected into a mould, and a steam heating forming process (under the process conditions of 125 ℃ and heating period of 250 s) is adopted to prepare the outer layer of the box body with the thickness of 16 mm;
coating 30g/m on the inner layer of the box body by adopting a gravure coating mode 2 Is a binder of (a);
laminating the inner layer of the box body coated with the adhesive and the middle layer of the box body at 60 ℃ for 420 seconds, and then compounding the two layers;
and bonding the formed outer layer of the box body with the other side of the middle layer of the box body through polyurethane adhesive or flexible epoxy resin adhesive to form the lithium battery express packaging box.
Performance detection is carried out on the light lithium battery express packaging box prepared in the embodiment 2 of the invention.
The density of the lithium battery express packaging box is measured by adopting a GB/T6343 test standard; the impact resistance was measured using the GB/T4857.5 test standard.
The detection result shows that the density of the light lithium battery express packaging box prepared in the embodiment 2 of the invention is only 42kg/m 3 The weight of the packing box is high; after the packaging box filled with 5kg of lithium batteries is subjected to drop test according to one corner, three sides and six sides of the height of 750mm, the packaging box is not damaged obviously, and the lithium batteries are not damaged and can be used normally; excellent impact resistance.
Example 3
The production process of the battery express packaging box comprises the following steps:
cutting the foam into 4mm for later use by using a sponge disc flat cutter on the middle layer of the box body;
injecting flame-retardant polypropylene foaming beads into a mold, and preparing a box outer layer with the thickness of 16mm by adopting a steam heating forming process;
coating 40g/m on the inner layer of the box body by adopting a gravure coating mode 2 Is a binder of (a);
compounding the inner layer of the box body coated with the adhesive with the middle layer of the box body through a dry compounding process;
and bonding the formed outer layer of the box body with the other side of the middle layer of the box body through polyurethane adhesive or flexible epoxy resin adhesive to form the lithium battery express packaging box.
Specifically, the density was 70kg/m at a thickness of 2mm 3 The polyimide foam of (2) is respectively adhered on two sides with thickness of 1mm and density of 160kg/m 3 Forming a 4mm thick middle layer of the box body for standby;
the oxygen index is 28 percent and the density is 30kg/m 3 The polypropylene foaming beads are injected into a mould, and a steam heating forming process (under the process conditions of 120 ℃ and heating period of 250 s) is adopted to prepare the outer layer of the box body with the thickness of 16 mm;
coating 40g/m on the inner layer of the box body by adopting a gravure coating mode 2 Is a binder of (a);
laminating the inner layer of the box body coated with the adhesive and the middle layer of the box body at 60 ℃ for 480 seconds and then compounding the two layers;
and bonding the formed outer layer of the box body with the other side of the middle layer of the box body through polyurethane adhesive or flexible epoxy resin adhesive to form the lithium battery express packaging box.
Performance detection is carried out on the light lithium battery express packaging box prepared in the embodiment 3 of the invention.
The density of the lithium battery express packaging box is measured by adopting a GB/T6343 test standard; the impact resistance was measured using the GB/T4857.5 test standard.
The detection result shows that the density of the light lithium battery express packaging box prepared in the embodiment 3 of the invention is only 45kg/m 3 The weight of the packing box is high; after the packaging box filled with 5kg of lithium batteries is subjected to drop test according to one corner, three sides and six sides of the height of 750mm, the packaging box is not damaged obviously, and the lithium batteries are not damaged and can be used normally; excellent impact resistance.
The foregoing has outlined rather broadly the principles and embodiments of the present invention in order that the best mode may be understood and appreciated by those skilled in the art that the present invention may be practiced in any other device or system and that the principles and embodiments of the present invention may be implemented in any combination. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims. The scope of the patent protection is defined by the claims and may include other embodiments that occur to those skilled in the art. Such other embodiments are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims (10)

1. The lithium battery express delivery transport packaging box is characterized in that a box body material of the transport packaging box is provided with a composite layer structure;
the composite layer structure comprises a blocking flame-retardant metal inner layer, a flame-retardant middle layer compounded on the blocking flame-retardant metal inner layer and a light flame-retardant outer layer compounded on the flame-retardant middle layer;
the light flame-retardant outer layer comprises a light impact-resistant flame-retardant outer layer;
the material of the light flame-retardant outer layer comprises a light flame-retardant outer layer foam material;
the light flame-retardant outer layer foam material is a polypropylene foam material;
the thickness of the light flame-retardant outer layer is 10-20 mm;
the density of the light flame-retardant outer layer is 15-45 kg/m 3 ；
The flame-retardant intermediate layer comprises a light high-flame-retardant intermediate layer;
the material of the flame-retardant intermediate layer comprises a flame-retardant intermediate layer foam material;
the flame-retardant interlayer foam material is a polyimide foam material;
the thickness of the flame-retardant intermediate layer is 2-5 mm;
the density of the flame-retardant intermediate layer is 80-200 kg/m 3 ；
The flame-retardant intermediate layer comprises a flame-retardant intermediate layer with a density which varies;
the density of the flame-retardant intermediate layer is changed from the inner side to the outer side in a descending way and then in an ascending way;
the inner side density of the flame-retardant intermediate layer is 100-200 kg/m 3 ；
The intermediate density of the flame-retardant intermediate layer is 50-80 kg/m 3 ；
The outer side density of the flame-retardant intermediate layer is 100-200 kg/m 3 ；
The flame-retardant intermediate layer is formed by bonding a plurality of density foam materials;
the inner barrier flame-retardant metal layer comprises an inner barrier flame-retardant metal film layer;
the thickness of the inner layer of the blocking flame-retardant metal is 0.01-0.03 mm.
2. The lithium battery express delivery transport package of claim 1, wherein the lithium battery transport package is a light vibration-damping flame-retardant lithium battery transport package.
3. The lithium battery express delivery transport package of claim 1, wherein the oxygen index of the light flame retardant outer layer is greater than or equal to 28%.
4. The lithium battery express delivery transportation packaging box according to claim 1, wherein,
the oxygen index of the flame-retardant intermediate layer is more than or equal to 32%.
5. The lithium battery express delivery transport package of claim 1, wherein the material of the inner barrier flame retardant metal layer comprises aluminum foil;
the aluminum foil comprises an O-state aluminum foil.
6. The lithium battery express delivery transport package of claim 1, wherein an adhesive layer is provided between the inner barrier flame retardant metal layer and the flame retardant intermediate layer and/or between the flame retardant intermediate layer and the light flame retardant outer layer;
the adhesive for bonding comprises polyurethane adhesive and/or flexible epoxy resin adhesive;
the dosage of the adhesive is 20-50 g/m 2 。
7. The lithium battery express delivery transport package of claim 6, wherein an adhesive is distributed in cells of the flame retardant intermediate layer at a junction of the flame retardant intermediate layer and the adhesive layer.
8. The lithium battery express delivery transport package of claim 7, wherein an adhesive is distributed in the recess of the light flame retardant outer layer at the junction of the light flame retardant outer layer and the adhesive layer;
the distributing includes forming a dendritic dispersed network structure.
9. The production method of the lithium battery express delivery transport packaging box according to any one of claims 1 to 8, which is characterized by comprising the following steps:
1) Placing the polypropylene foaming beads in a mould, and obtaining a formed structure of the lithium battery transportation packaging box after a steam heating forming process;
bonding the aluminum foil coated with the adhesive with polyimide foam through a dry process compounding process to obtain a composite layer;
2) And (3) bonding one surface of the polyimide foam layer of the composite layer obtained by the steps with the outer surface of the molding structure body to obtain the lithium battery transportation packaging box.
10. The production method according to claim 9, wherein the polypropylene expanded beads comprise flame retardant polypropylene expanded beads;
the oxygen index of the flame-retardant polypropylene foaming beads is more than or equal to 28%;
the temperature of the steam heating forming process is 120-130 ℃;
the time of the steam heating forming process is 200-300 s;
the temperature of the dry process compounding process is 50-80 ℃;
the time of the dry process compounding process is 300-600 s.
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