CN113895774A - Express transport packaging box for lithium battery and production method of express transport packaging box - Google Patents

Express transport packaging box for lithium battery and production method of express transport packaging box Download PDF

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Publication number
CN113895774A
CN113895774A CN202111251815.3A CN202111251815A CN113895774A CN 113895774 A CN113895774 A CN 113895774A CN 202111251815 A CN202111251815 A CN 202111251815A CN 113895774 A CN113895774 A CN 113895774A
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Prior art keywords
flame
retardant
layer
lithium battery
packaging box
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CN202111251815.3A
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Chinese (zh)
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CN113895774B (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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    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

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

Description

Express transport packaging box for lithium battery and production method of express transport packaging box
Technical Field
The invention belongs to the technical field of lithium battery express delivery packaging, relates to a lithium battery transport packaging box and a production method thereof, and particularly relates to a lithium battery express delivery 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, is widely applied to mobile phones, computers, robots and automobiles, and covers a plurality of fields of electronics and electric appliances.
With the popularization of electronic products, the application range of lithium batteries is continuously expanded, so that the outward transportation capacity of the lithium batteries is high. However, lithium batteries are extremely flammable, high in energy, unstable in chemical constitution, and may explode if damaged, and belong to the ninth category of dangerous goods. Large logistics enterprises and customs of all countries have set strict transportation rules for such products. The lithium battery is forbidden to be carried by the civil aviation airliner from 4 months and 1 day in 2016, and the change has a great 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 large-scale development is not achieved.
Therefore, how to develop a packaging box suitable for express transportation of lithium batteries can reduce the transportation risk of lithium batteries, and solve the limitation of transportation, and the packaging box becomes one of the problems to be solved urgently by domestic production enterprises and front-line researchers.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is to provide a lithium battery transportation packaging box and a production method thereof. The lithium battery transport 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 problem of potential safety hazards 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 of a composite layer structure;
the composite layer structure comprises a flame-retardant metal inner layer, a flame-retardant intermediate layer compounded on the flame-retardant metal inner layer, and a light flame-retardant outer layer compounded on the flame-retardant intermediate layer.
Preferably, the lightweight flame retardant outer layer comprises a lightweight impact resistant flame retardant outer layer;
the flame retardant intermediate layer comprises a lightweight high flame retardant intermediate layer;
the barrier flame-retardant metal inner layer comprises a barrier flame-retardant metal film inner layer;
the lithium battery transportation packing box is a light vibration-damping flame-retardant lithium battery transportation packing box.
Preferably, the material of the lightweight flame-retardant outer layer comprises a lightweight flame-retardant outer layer foam material;
the lightweight 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 middle layer foam comprises a polyimide foam.
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/m3；
The oxygen index of the light flame-retardant outer layer is more than or equal to 28 percent.
Preferably, the thickness of the flame-retardant intermediate layer is 2-5 mm;
the density of the flame-retardant middle layer is 80-200 kg/m3；
The oxygen index of the flame-retardant intermediate layer is greater than or equal to 32%.
Preferably, the material of the inner layer of the flame-retardant barrier metal comprises aluminum foil;
the aluminum foil comprises an O-state aluminum foil;
the thickness of the barrier flame-retardant metal inner layer is 0.01-0.03 mm.
Preferably, an adhesive layer is arranged between the inner flame-retardant barrier 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 a polyurethane adhesive and/or a flexible epoxy resin adhesive;
the dosage of the adhesive is 20-50 g/m2；
At the junction of the flame-retardant intermediate layer and the bonding layer, adhesives are distributed in the cells of the flame-retardant intermediate layer;
adhesive is distributed at the joint of the light flame-retardant outer layer and the adhesive layer and at the concave part of the light flame-retardant outer layer;
the distribution includes forming a dendritic dispersed network structure.
Preferably, the flame retardant intermediate layer comprises a flame retardant intermediate layer of varying density;
the flame-retardant intermediate layer is formed by bonding multiple density foam materials;
the density of the flame-retardant middle layer is changed from the inner side to the outer side in a way of decreasing gradually and then increasing gradually;
the inner side density of the flame-retardant middle layer is 100-200 kg/m3；
The intermediate density of the flame-retardant intermediate layer is 50-80 kg/m3；
The outer side density of the flame-retardant middle layer is 100-200 kg/m3。
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 mold, and obtaining a molding structure body of the lithium battery transport packaging box after a steam heating molding process;
bonding the aluminum foil coated with the adhesive with polyimide foam through a dry compounding process to obtain a composite layer;
2) and (3) bonding one surface of the polyimide foam layer of the composite layer obtained in the step with the outer surface of the molded structure to obtain the lithium battery transport packaging box.
Preferably, the polypropylene expanded beads comprise flame-retardant polypropylene expanded beads;
the oxygen index of the flame-retardant polypropylene foaming bead is more than or equal to 28 percent;
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 method composite process is 50-80 ℃;
the time of the dry compounding 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 of a composite layer structure; the composite layer structure comprises a flame-retardant metal inner layer, a flame-retardant intermediate layer compounded on the flame-retardant metal inner layer, and a light flame-retardant outer layer compounded on the flame-retardant intermediate layer. Compared with the prior art, the invention aims at the problem that the existing lithium ion battery has higher risk in the aspects of transportation such as express logistics and the like, and the special transport packaging box for the lithium ion battery is rarely available in the prior art, so that the further development of the lithium battery is limited.
The invention creatively designs a lithium battery transport packaging box, adopts specific structure and material selection, has excellent flame retardant property, isolation property, good energy absorption and vibration reduction properties and the like, and is a light and safe lithium battery express packaging box. The express packaging box for the lithium battery is composed of an outer layer, a middle layer and an inner layer, wherein the middle layer is made of a light high-flame-retardant material, the outer layer is made of a light, impact-resistant and flame-retardant material, and the inner layer is made of a high-barrier and flame-retardant film material. The specific intermediate layer has excellent flame retardant property, meets the requirement of UL94VO, and can form a fire retardant layer to inhibit the spread of fire. Meanwhile, the lithium battery has good compression resilience and small permanent compression deformation, and can be used as a vibration damping material for reducing vibration damage in the transportation process of the lithium battery. In addition, the paint also has the advantages of light weight, good solvent resistance, high and low temperature resistance, heat insulation, and the like; the outer layer has good energy absorption and vibration reduction performance and can slow down the vibration impact of the lithium battery in the transportation process; the inner layer is made of a metal film material with barrier and flame retardant properties, and has the characteristic of light weight. The lithium battery transport package box provided by the invention can effectively solve the problem of potential safety hazard in the express delivery process of the conventional lithium battery. And the production process is simple, and is suitable for large-scale production and popularization.
Experimental results show that 5kg of lithium batteries are arranged in the express transport packaging box provided by the invention, and after one-corner, three-edge and six-face drop tests according to the height of 750mm, the packaging box is not obviously damaged, and the lithium batteries arranged in the packaging box are not damaged and can be normally used.
Drawings
FIG. 1 is a schematic diagram of the cross-sectional structure of a lithium battery transport packaging box prepared by the invention.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
All of the starting materials of the present invention, without particular limitation as to their source, may be purchased commercially 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 their purity, and the present invention preferably adopts the purity of industrial purity or the purity conventionally used in the field of production of transport packaging materials.
All the raw materials, the marks and the acronyms thereof belong to the conventional marks and acronyms in the field, each mark and acronym is clear and definite in the field of related application, and the raw materials can be purchased from the market or prepared by a conventional method by the technical staff in the field according to the marks, the acronyms and the corresponding application.
All the processes of the invention, the abbreviations thereof belong to the common abbreviations in the art, each abbreviation is clear and definite in the field of its associated use, and the ordinary process steps thereof can be understood by those skilled in the art from the abbreviations.
The invention provides a lithium battery transport packaging box, wherein a box body material of the transport packaging box is of a composite layer structure;
the composite layer structure comprises a flame-retardant metal inner layer, a flame-retardant intermediate layer compounded on the flame-retardant metal inner layer, and a light flame-retardant outer layer compounded on the flame-retardant intermediate layer.
In the present invention, the case preferably refers to the wall material of the case, i.e., each wall surface of the case, including front, back, left, right, up, down, and the like.
In the invention, the lithium battery transport packaging box is preferably a light vibration-damping flame-retardant lithium battery transport packaging box.
In the present invention, the lightweight flame retardant outer layer preferably comprises a lightweight impact resistant flame retardant outer layer.
In the present invention, the material of the lightweight flame-retardant outer layer preferably includes a lightweight flame-retardant outer layer foam material. Specifically, the lightweight flame retardant outer layer foam preferably comprises a polypropylene foam. Wherein the polypropylene foam is preferably a polypropylene foam having a closed cell structure.
In the invention, the thickness of the light flame-retardant outer layer is preferably 10-20 mm, more preferably 12-18 mm, and more preferably 14-16 mm.
In the invention, the density of the light flame-retardant outer layer is preferably 15-45 kg/m3More preferably 20 to 40kg/m3More preferably 25 to 35kg/m3。
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 invention is made of flame-retardant polypropylene beads by a mould through a steam heating forming process. The material has good energy absorption and vibration reduction performance, and can slow down the vibration impact of the lithium battery in the transportation process. Specifically, the thickness is preferably 10 to 20 mm.
In the present invention, the flame-retardant intermediate layer preferably includes a lightweight highly 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. Specifically, the flame-retardant intermediate layer foam material preferably includes a polyimide foam material. Wherein the polyimide foam material is preferably a polyimide foam material with an open-cell structure.
In the invention, the thickness of the flame-retardant intermediate layer is preferably 2-5 mm, more preferably 2.5-4.5 mm, and more preferably 3-4 mm.
In the invention, the density of the flame-retardant intermediate layer is preferably 80-200 kg/m3More preferably 100 to 180kg/m3More preferably 120 to 160kg/m3。
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 that varies in density. Specifically, 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 from inside to outside in a decreasing and then increasing manner.
Wherein, in the invention, the inner side density of the flame-retardant middle layer is preferably 100-200 kg/m3More preferably 120 to 180kg/m3More preferably 140 to 160kg/m3。
In the invention, the intermediate density of the flame-retardant intermediate layer is preferably 50-80 kg/m3More preferably 55 to 75kg/m3More preferably 60 to 70kg/m3。
In the invention, the outer side density of the flame-retardant intermediate layer is preferably 100-200 kg/m3More preferably 120 to 180kg/m3More preferably 140 to 160kg/m3。
The intermediate layer in the present invention is particularly selected to be made of Polyimide (PI) foam. The PI foam is a high 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 the spread of the fire. Meanwhile, the PI foam has good compression resilience and small permanent compression deformation, and can be used as a vibration damping material for reducing vibration damage in the transportation process of the lithium battery. In addition, the PI foam also has the advantages of light weight, good solvent resistance, high and low temperature resistance, heat insulation and the like. In addition, the P of the intermediate layer takes certain requirements on mechanical strength and vibration damping into considerationThe density and the thickness of the foam I are moderate, and the density is preferably 80-200 kg/m3(ii) a The thickness is preferably 2-5 mm.
In the present invention, the barrier flame-retardant metal inner layer preferably includes a barrier flame-retardant metal thin film inner layer. 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 flame retardant barrier metal preferably includes an aluminum foil, and more particularly, the aluminum foil preferably includes an O-state aluminum foil.
In the invention, the thickness of the barrier flame-retardant metal inner layer is preferably 0.01-0.03 mm, more preferably 0.014-0.026 mm, and more preferably 0.018-0.022 mm.
In the present invention, an adhesive layer is preferably provided between the barrier flame-retardant metal inner layer and the flame-retardant intermediate layer and/or between the flame-retardant intermediate layer and the lightweight flame-retardant outer layer.
In the present invention, the means of compounding preferably includes adhesion.
In the present invention, the adhesive for bonding preferably includes a polyurethane adhesive and/or a flexible epoxy adhesive, and more preferably a polyurethane adhesive or a flexible epoxy adhesive.
In the invention, the dosage of the adhesive is preferably 20-50 g/m2More preferably 25 to 45g/m2More preferably 30 to 40g/m2。
In the invention, at the junction of the flame-retardant intermediate layer and the bonding layer, the bonding agent is preferably distributed in the cells of the flame-retardant intermediate layer. And adhesive is preferably distributed at the junction of the light flame-retardant outer layer and the adhesive layer and at the concave part of the light flame-retardant outer layer. In particular, the distribution preferably includes forming a dendritic dispersed network structure. Specifically, the network structure is more preferably a 3D network structure. In the invention, the adhesive is also distributed in the foam holes and the depressions of the foam material at the junction with the adhesive layer, and the adhesive is distributed in the foam holes and the depressions in a dendritic form and can form a 3D dendritic adhesive network.
The invention is particularly bonded between the outer layer and the middle layer and between the middle layer and the inner layer by polyurethane adhesive or flexible epoxy resin adhesive with large applicable temperature difference, and the flexibility can bear the alternate examination of cold and hot environments in the transportation process. The amount of the adhesive is preferably 20-50 g/m2。
The invention provides an express packaging box for a lithium battery. The middle layer is made of light high-flame-retardant polyimide foam, the outer layer is made of light, impact-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 the polyurethane adhesive or the flexible epoxy resin, so that the express packaging box for the lithium battery is light and safe, and the potential safety hazard problem existing in the express process of the lithium battery at present can be effectively solved.
The invention also provides a production method of the lithium battery transport packaging box, which comprises the following steps:
1) placing the polypropylene foaming beads in a mold, and obtaining a molding structure body of the lithium battery transport packaging box after a steam heating molding process;
bonding the aluminum foil coated with the adhesive with polyimide foam through a dry compounding process to obtain a composite layer;
2) and (3) bonding one surface of the polyimide foam layer of the composite layer obtained in the step with the outer surface of the molded structure to obtain the lithium battery transport packaging box.
Firstly, placing polypropylene foaming beads in a mold, and obtaining a molding structure body of the lithium battery transport packaging box after a steam heating molding process;
and bonding the aluminum foil coated with the adhesive with polyimide foam through a dry 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 invention, the flame-retardant polypropylene foaming bead is preferably prepared from one or more of a phosphorus flame retardant, ammonium polyphosphate, antimony trioxide and aluminum hydroxide. Specifically, the flame-retardant polypropylene foaming beads preferably contain one or more of a phosphorus flame retardant, ammonium polyphosphate, antimony trioxide and aluminum hydroxide.
In the invention, the temperature of the steam heating forming process is preferably 120-130 ℃, more preferably 122-128 ℃, and more preferably 124-126 ℃.
In the invention, the time of the steam heating forming process is preferably 200 to 300s, more preferably 220 to 280s, and more preferably 240 to 260 s.
In the invention, the temperature of the dry-method composite process is preferably 50-80 ℃, more preferably 55-75 ℃, and more preferably 60-70 ℃.
In the invention, the time of the dry compounding process is preferably 300-600 s, more preferably 350-550 s, and more preferably 400-500 s.
And finally, bonding one surface of the polyimide foam layer of the composite layer obtained in the step with the outer surface of the formed structure to obtain the lithium battery transportation packaging box.
The invention integrates and refines the whole production process, and better ensures the performance of the express packaging box of the lithium battery, and the production method specifically comprises the following steps:
cutting the polyimide foam into required thickness by using a sponge disc horizontal cutting machine for later use;
preparing the polypropylene foaming beads into the outer layer of the required box through a mould by adopting a steam heating forming process;
coating a certain amount of adhesive on the inner layer by adopting a gravure coating mode;
and compounding the inner layer coated with the adhesive with the middle layer through a dry compounding process, and then compounding the inner layer coated with the adhesive with the outer layer through an adhesive.
Specifically, the formed outer-layer box body is bonded with the other surface of the middle layer through a polyurethane adhesive or a flexible epoxy resin adhesive to form the express packaging box for the lithium battery.
Referring to fig. 1, fig. 1 is a schematic cross-sectional structure diagram of a lithium battery transportation packaging box prepared by the 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 of a composite layer structure; the composite layer structure comprises a flame-retardant metal inner layer, a flame-retardant intermediate layer compounded on the flame-retardant metal inner layer, and a light flame-retardant outer layer compounded on the flame-retardant intermediate layer. Compared with the prior art, the invention aims at the problem that the existing lithium ion battery has higher risk in the aspects of transportation such as express logistics and the like, and the special transport packaging box for the lithium ion battery is rarely available in the prior art, so that the further development of the lithium battery is limited. The invention creatively designs a lithium battery transport packaging box, adopts specific structure and material selection, has excellent flame retardant property, isolation property, good energy absorption and vibration reduction properties and the like, and is a light and safe lithium battery express packaging box. The express packaging box for the lithium battery is composed of an outer layer, a middle layer and an inner layer, wherein the middle layer is made of a light high-flame-retardant material, the outer layer is made of a light, impact-resistant and flame-retardant material, and the inner layer is made of a high-barrier and flame-retardant film material. The specific intermediate layer has excellent flame retardant property, meets the requirement of UL94VO, and can form a fire retardant layer to inhibit the spread of fire. Meanwhile, the lithium battery has good compression resilience and small permanent compression deformation, and can be used as a vibration damping material for reducing vibration damage in the transportation process of the lithium battery. In addition, the paint also has the advantages of light weight, good solvent resistance, high and low temperature resistance, heat insulation, and the like; the outer layer has good energy absorption and vibration reduction performance and can slow down the vibration impact of the lithium battery in the transportation process; the inner layer is made of a metal film material with barrier and flame retardant properties, and has the characteristic of light weight. The lithium battery transport package box provided by the invention can effectively solve the problem of potential safety hazard in the express delivery process of the conventional lithium battery. And the production process is simple, and is suitable for large-scale production and popularization.
Experimental results show that 5kg of lithium batteries are arranged in the express transport packaging box provided by the invention, and after one-corner, three-edge and six-face drop tests according to the height of 750mm, the packaging box is not obviously damaged, and the lithium batteries arranged in the packaging box are not damaged and can be normally used.
For further illustration of the present invention, the following detailed description of a lithium battery transportation packaging box and a method for manufacturing the same according to the present invention is provided with reference to the following examples, but it should be understood that the examples are implemented on the premise of the technical solution of the present invention, and the detailed embodiments and specific operation procedures are given only for further illustration of the features and advantages of the present invention, 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
Production process of battery express packaging box:
cutting the foam into 3mm for later use by a sponge disc horizontal cutting machine on the middle layer of the box body;
injecting the 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 of inner layer of the box body by adopting a gravure coating mode2The adhesive of (1);
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 adhering the outer layer of the molded box body with the other surface of the middle layer of the box body through a polyurethane adhesive or a flexible epoxy resin adhesive to form the express packaging box for the lithium battery.
Specifically, the density of the product is 80kg/m at a thickness of 1mm3The polyimide foam was bonded on both sides with a thickness of 1mm and a density of 160kg/m, respectively3Forming a middle layer of a box body with the thickness of 3mm for later use;
the oxygen index is 28 percent and the density is 30kg/m3The expanded beads of polypropylene (A) are injected into a mold,preparing a box outer layer with the thickness of 15mm by adopting a steam heating forming process (under the process conditions of 120 ℃ and a heating period of 240 s);
coating 30g/m of inner layer of the box body by adopting a gravure coating mode2The adhesive of (1);
laminating the inner layer of the box body coated with the adhesive and the middle layer of the box body for 420 seconds at the temperature of 60 ℃ and then compounding together;
and adhering the outer layer of the molded box body with the other surface of the middle layer of the box body through a polyurethane adhesive or a flexible epoxy resin adhesive to form the express packaging box for the lithium battery.
The performance of the light lithium battery express packaging box prepared in the embodiment 1 of the invention is detected.
The density of the express packaging box for the lithium battery is measured by adopting a test standard GB/T6343; the impact resistance was determined using the test standard GB/T4857.5.
Detection results show that the density of the light lithium battery express packaging box prepared in the embodiment 1 of the invention is only 40kg/m3The light weight degree of the packing box is high; after the packing box containing 5kg of lithium batteries is subjected to drop test according to one corner, three sides and six sides with the height of 750mm, the packing box is not obviously damaged, and the lithium batteries contained in the packing box are not damaged and can be normally used; the impact resistance is excellent.
Example 2
Production process of battery express packaging box:
cutting the foam into 3mm for later use by a sponge disc horizontal cutting machine on the middle layer of the box body;
injecting the 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 of inner layer of the box body by adopting a gravure coating mode2The adhesive of (1);
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 adhering the outer layer of the molded box body with the other surface of the middle layer of the box body through a polyurethane adhesive or a flexible epoxy resin adhesive to form the express packaging box for the lithium battery.
Specifically, the density of the product is 60kg/m at a thickness of 1mm3The polyimide foam of which both sides are respectively bonded with a thickness of 1mm and a density of 150kg/m3Forming a middle layer of a box body with the thickness of 3mm for later use;
the oxygen index is 28 percent and the density is 35kg/m3The polypropylene foaming beads are injected into a mould, and a steam heating forming process (under the process conditions of 125 ℃ and a heating period of 250 s) is adopted to prepare an outer layer of a box body with the thickness of 16 mm;
coating 30g/m of inner layer of the box body by adopting a gravure coating mode2The adhesive of (1);
laminating the inner layer of the box body coated with the adhesive and the middle layer of the box body for 420 seconds at the temperature of 60 ℃ and then compounding together;
and adhering the outer layer of the molded box body with the other surface of the middle layer of the box body through a polyurethane adhesive or a flexible epoxy resin adhesive to form the express packaging box for the lithium battery.
The performance of the express packaging box for the light lithium battery prepared in the embodiment 2 of the invention is detected.
The density of the express packaging box for the lithium battery is measured by adopting a test standard GB/T6343; the impact resistance was determined using the test standard GB/T4857.5.
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/m3The light weight degree of the packing box is high; after the packing box containing 5kg of lithium batteries is subjected to drop test according to one corner, three sides and six sides with the height of 750mm, the packing box is not obviously damaged, and the lithium batteries contained in the packing box are not damaged and can be normally used; the impact resistance is excellent.
Example 3
Production process of battery express packaging box:
cutting the foam into 4mm for later use by a sponge disc horizontal cutting machine on the middle layer of the box body;
injecting the 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 mode2The adhesive of (1);
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 adhering the outer layer of the molded box body with the other surface of the middle layer of the box body through a polyurethane adhesive or a flexible epoxy resin adhesive to form the express packaging box for the lithium battery.
Specifically, the density of the steel plate is 70kg/m at the thickness of 2mm3The polyimide foam was bonded on both sides with a thickness of 1mm and a density of 160kg/m, respectively3Forming a middle layer of a box body with the thickness of 4mm for later use;
the oxygen index is 28 percent and the density is 30kg/m3The 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 250 s) is adopted to prepare an outer layer of a box body with the thickness of 16 mm;
coating 40g/m on the inner layer of the box body by adopting a gravure coating mode2The adhesive of (1);
laminating the inner layer of the box body coated with the adhesive and the middle layer of the box body for 480s at the temperature of 60 ℃ and then compounding;
and adhering the outer layer of the molded box body with the other surface of the middle layer of the box body through a polyurethane adhesive or a flexible epoxy resin adhesive to form the express packaging box for the lithium battery.
The performance of the light lithium battery express packaging box prepared in the embodiment 3 of the invention is detected.
The density of the express packaging box for the lithium battery is measured by adopting a test standard GB/T6343; the impact resistance was determined using the test standard GB/T4857.5.
Detection results show that the density of the light lithium battery express packaging box prepared in the embodiment 3 of the invention is only 45kg/m3The light weight degree of the packing box is high; after the packing box internally provided with 5kg of lithium batteries is subjected to one-corner, three-side and six-side drop test according to the height of 750mm, the packing box has no obvious damage, and the internally provided lithium batteries are also free of damage and can be straightenedThe composition is frequently used; the impact resistance is excellent.
The foregoing detailed description of the present invention provides a lithium battery courier transport package and method for making the same, wherein specific examples are provided to illustrate the principles and implementations of the present invention, and the above description of the examples is provided only to facilitate an understanding of the method and its core concepts, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention. The scope of the invention 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 languages of the claims.

Claims (10)

1. The lithium battery transport packaging box is characterized in that a box body material of the transport packaging box is of a composite layer structure;
the composite layer structure comprises a flame-retardant metal inner layer, a flame-retardant intermediate layer compounded on the flame-retardant metal inner layer, and a light flame-retardant outer layer compounded on the flame-retardant intermediate layer.
2. The lithium battery transport package box of claim 1, wherein the lightweight flame retardant outer layer comprises a lightweight impact resistant flame retardant outer layer;
the flame retardant intermediate layer comprises a lightweight high flame retardant intermediate layer;
the barrier flame-retardant metal inner layer comprises a barrier flame-retardant metal film inner layer;
the lithium battery transportation packing box is a light vibration-damping flame-retardant lithium battery transportation packing box.
3. The lithium battery transportation packaging box according to claim 1, wherein the material of the lightweight flame-retardant outer layer comprises a lightweight flame-retardant outer layer foam material;
the lightweight 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 middle layer foam comprises a polyimide foam.
4. The lithium battery transportation packaging box according to claim 1, wherein 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/m3；
The oxygen index of the light flame-retardant outer layer is more than or equal to 28 percent.
5. The lithium battery transportation packaging box according to claim 1, wherein the thickness of the flame-retardant intermediate layer is 2-5 mm;
the density of the flame-retardant middle layer is 80-200 kg/m3；
The oxygen index of the flame-retardant intermediate layer is greater than or equal to 32%.
6. The lithium battery transportation packaging box of claim 1, wherein the material of the inner layer of barrier flame retardant metal comprises aluminum foil;
the aluminum foil comprises an O-state aluminum foil;
the thickness of the barrier flame-retardant metal inner layer is 0.01-0.03 mm.
7. The lithium battery transportation packaging box according to claim 3, wherein an adhesive layer is arranged 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 a polyurethane adhesive and/or a flexible epoxy resin adhesive;
the dosage of the adhesive is 20-50 g/m2；
At the junction of the flame-retardant intermediate layer and the bonding layer, adhesives are distributed in the cells of the flame-retardant intermediate layer;
adhesive is distributed at the joint of the light flame-retardant outer layer and the adhesive layer and at the concave part of the light flame-retardant outer layer;
the distribution includes forming a dendritic dispersed network structure.
8. The lithium battery transportation packaging box according to claim 3, wherein the flame-retardant intermediate layer comprises a flame-retardant intermediate layer with a density variation;
the flame-retardant intermediate layer is formed by bonding multiple density foam materials;
the density of the flame-retardant middle layer is changed from the inner side to the outer side in a way of decreasing gradually and then increasing gradually;
the inner side density of the flame-retardant middle layer is 100-200 kg/m3；
The intermediate density of the flame-retardant intermediate layer is 50-80 kg/m3；
The outer side density of the flame-retardant middle layer is 100-200 kg/m3。
9. The production method of the lithium battery transportation packaging box is characterized by comprising the following steps:
1) placing the polypropylene foaming beads in a mold, and obtaining a molding structure body of the lithium battery transport packaging box after a steam heating molding process;
bonding the aluminum foil coated with the adhesive with polyimide foam through a dry compounding process to obtain a composite layer;
2) and (3) bonding one surface of the polyimide foam layer of the composite layer obtained in the step with the outer surface of the molded structure to obtain the lithium battery transport packaging box.
10. The production process according to claim 9, wherein the polypropylene expanded beads comprise flame-retardant polypropylene expanded beads;
the oxygen index of the flame-retardant polypropylene foaming bead is more than or equal to 28 percent;
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 method composite process is 50-80 ℃;
the time of the dry compounding process is 300-600 s.
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