CN210679941U - Aluminum-plastic flexible package with novel structure for lithium battery - Google Patents
Aluminum-plastic flexible package with novel structure for lithium battery Download PDFInfo
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- CN210679941U CN210679941U CN201920966110.1U CN201920966110U CN210679941U CN 210679941 U CN210679941 U CN 210679941U CN 201920966110 U CN201920966110 U CN 201920966110U CN 210679941 U CN210679941 U CN 210679941U
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- 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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Abstract
The utility model relates to an aluminum-plastic flexible package for a lithium battery with a novel structure, which comprises an insulating coating, a nylon layer, an outer adhesive bonding layer, an upper chromizing treatment layer, an aluminum foil layer, a lower chromizing treatment layer, an inner adhesive bonding layer and a cast polypropylene layer which are sequentially arranged from the outer side to the inner side; wherein, the inner and outer surfaces of the aluminum foil layer are treated by trivalent chromium passivator to form a chromizing treatment layer and a chromizing treatment layer; then compounding the nylon layer and the cast polypropylene layer through the outer layer adhesive bonding layer and the inner layer adhesive bonding layer, and coating the insulating coating on the outer surface of the nylon layer; the utility model improves the stability of the electrical insulation performance of the aluminum plastic film material under the high temperature and high humidity environment, thereby effectively improving the safety and the service life of the battery; and the preparation method is simple and the process conditions are mature.
Description
Technical Field
The utility model belongs to the technical field of lithium cell flexible packaging material, concretely relates to aluminum-plastic flexible package for lithium cell of novel structure.
Background
The development of lithium batteries goes through three stages, namely, a lithium battery packaged by a steel shell firstly and a lithium battery packaged by an aluminum shell later, the currently used flexible package lithium battery is a third-generation product, and the flexible package lithium battery has the advantages of large capacity, light weight, small volume, good safety and the like, so that the lithium battery becomes the development direction of the lithium battery. At present, the outer layer of the aluminum plastic film used by the flexible package lithium battery generally adopts a single-layer nylon (polyamide) film material, which has good mechanical strength and self-lubricating property, good abrasion resistance and solvent resistance, and can be used as an outer protective layer of the aluminum plastic film to prolong the service life of the aluminum plastic film.
However, because the nylon material has high water absorption, the saturated water content can reach more than 3%, and water is used as a conductive medium, which has obvious influence on the electrical insulation performance of the material, in the actual use process, the water content of the nylon material on the surface of the aluminum-plastic film is different due to climate difference in different areas, so that the electrical insulation performance stability of the corresponding aluminum-plastic film material is poor, the difference is more obvious particularly in a high-temperature and high-humidity environment, and various adverse effects are generated on the service life and the safety of the lithium battery.
In view of the above technical problems, it is desirable to improve the same.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome the defect among the above-mentioned prior art, provide the aluminium-plastic flexible package for the lithium cell of a novel structure, can effectively improve the electrical insulation performance of aluminium-plastic flexible package material to improve the safety in utilization and the stability of lithium cell.
In order to achieve the above purpose, the utility model adopts the technical scheme that: an aluminum-plastic flexible package for a lithium battery with a novel structure comprises an insulating coating, a nylon layer, an outer glue bonding layer, an upper chromizing treatment layer, an aluminum foil layer, a lower chromizing treatment layer, an inner glue bonding layer and a cast polypropylene layer which are sequentially arranged from the outer side to the inner side; wherein, the inner and outer surfaces of the aluminum foil layer are treated by trivalent chromium passivator to form an upper chromizing treatment layer and a lower chromizing treatment layer; and compounding the nylon layer and the cast polypropylene layer through the outer layer adhesive bonding layer and the inner layer adhesive bonding layer, and coating the insulating coating on the outer surface of the nylon layer.
As an optimal scheme of the utility model, be formed with a plurality of wear-resisting particles on the insulating coating, this wear-resisting particle equidistance is laid on the insulating coating.
As a preferred scheme of the utility model, insulating coating is water-soluble epoxy insulating coating.
As a preferred scheme of the utility model, the water-soluble epoxy insulating coating is polyol, anhydride modified epoxy resin, and thickness is 3-10 μm.
As a preferred scheme of the utility model, the thickness of nylon layer is 15 mu m-25 mu m.
As a preferred scheme of the utility model, the outer layer glue bond line comprises polyurethane adhesive, and the thickness is 2 mu m-5 mu m.
As a preferred scheme of the utility model, the thickness of aluminium foil layer is 35 mu m-40 mu m.
As a preferable proposal of the utility model, the thickness of the upper chromizing layer and the lower chromizing layer is 0.2 to 1 μm.
As a preferred scheme of the utility model, the inner layer adhesive bonding layer is composed of epoxy resin adhesive, and the thickness is 2-5 μm.
As a preferred embodiment of the present invention, the thickness of the cast polypropylene layer is 40 μm to 80 μm.
The utility model has the advantages that: the utility model improves the stability of the electrical insulation performance of the aluminum plastic film material under the high temperature and high humidity environment, thereby effectively improving the safety and the service life of the battery; and the preparation method is simple and the process conditions are mature.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a sectional view taken along line a-a of the present invention;
reference numbers in the figures: insulating coating 1, nylon layer 2, outer gluey bond line 3, go up chromizing treatment layer 4, aluminium foil layer 5, lower chromizing treatment layer 6, inlayer gluey bond line 7, curtain coating polypropylene layer 8, wear-resisting granule 9.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings.
Example 1:
as shown in fig. 1-2, an aluminum-plastic flexible package for a lithium battery with a novel structure comprises an insulating coating 1, a nylon layer 2, an outer layer adhesive bonding layer 3, an upper chromizing layer 4, an aluminum foil layer 5, a lower chromizing layer 6, an inner layer adhesive bonding layer 7 and a cast polypropylene layer 8 which are sequentially arranged from the outer side to the inner side; a plurality of wear-resistant particles 9 are formed on the insulating coating 1, and the wear-resistant particles 9 are equidistantly distributed on the insulating coating 1; the wear-resistant particles 9 are arranged on the insulating coating 1, so that the aluminum-plastic flexible packaging material for the lithium battery has high wear resistance, is not easy to wear and has long service life, and further, the overall protection of the appearance of the lithium battery is improved; the utility model improves the stability of the electrical insulation performance of the aluminum plastic film material under the high temperature and high humidity environment, thereby effectively improving the safety and the service life of the battery; and the preparation method is simple and the process conditions are mature.
The insulating coating 1 is a water-soluble epoxy insulating coating, the thickness of the water-soluble epoxy insulating coating is 10 micrometers, the thickness of the nylon layer 2 is 25 micrometers, the thickness of the outer glue bonding layer 3 is 2 micrometers, the thickness of the aluminum foil layer 5 is 35 micrometers, the upper chromizing layer 4 and the lower chromizing layer 6 are film layers which are formed by processing the aluminum foil layer 5 through a trivalent chromium passivating agent and have the thickness of 0.1 micrometer, the thickness of the inner glue bonding layer 7 is 2 micrometers, and the thickness of the cast polypropylene layer 8 is 40 micrometers.
Example 2:
the insulating coating 1 is a water-soluble epoxy insulating coating, the thickness of the water-soluble epoxy insulating coating is 8 micrometers, the thickness of the nylon layer 2 is 20 micrometers, the thickness of the outer glue bonding layer 3 is 3 micrometers, the thickness of the aluminum foil layer 5 is 40 micrometers, the upper chromizing layer 4 and the lower chromizing layer 6 are film layers which are formed by processing the aluminum foil layer 5 through a trivalent chromium passivating agent and have the thickness of 0.4 micrometers, the thickness of the inner glue bonding layer 7 is 3 micrometers, and the thickness of the cast polypropylene layer 8 is 80 micrometers.
Example 3:
the insulating coating 1 is a water-soluble epoxy insulating coating, the thickness of the water-soluble epoxy insulating coating is 3 micrometers, the thickness of the nylon layer 2 is 15 micrometers, the thickness of the outer glue bonding layer 3 is 4 micrometers, the thickness of the aluminum foil layer 5 is 35 micrometers, the upper chromizing layer 4 and the lower chromizing layer 6 are film layers which are formed by processing the aluminum foil layer 5 through a trivalent chromium passivating agent and have the thickness of 0.8 micrometers, the thickness of the inner glue bonding layer 7 is 5 micrometers, and the thickness of the cast polypropylene layer 8 is 65 micrometers.
Example 4:
the insulating coating 1 is a water-soluble epoxy insulating coating, the thickness of the water-soluble epoxy insulating coating is 6 micrometers, the thickness of the nylon layer 2 is 18 micrometers, the thickness of the outer glue bonding layer 3 is 5 micrometers, the thickness of the aluminum foil layer 5 is 40 micrometers, the upper chromizing layer 4 and the lower chromizing layer 6 are film layers which are formed by processing the aluminum foil layer 5 through a trivalent chromium passivating agent and have the thickness of 1 micrometer, the thickness of the inner glue bonding layer 7 is 4 micrometers, and the thickness of the cast polypropylene layer 8 is 70 micrometers.
Example 5:
the insulating coating 1 is a water-soluble epoxy insulating coating, the thickness of the water-soluble epoxy insulating coating is 5 micrometers, the thickness of the nylon layer 2 is 22 micrometers, the thickness of the outer glue bonding layer 3 is 4 micrometers, the thickness of the aluminum foil layer 5 is 38 micrometers, the upper chromizing layer 4 and the lower chromizing layer 6 are film layers which are formed by processing the aluminum foil layer 5 through a trivalent chromium passivating agent and have the thickness of 0.6 micrometers, the thickness of the inner glue bonding layer 7 is 5 micrometers, and the thickness of the cast polypropylene layer 8 is 75 micrometers.
Comparative example 1:
the preparation of the aluminum-plastic film material is the same as that of example 1, except that the surface of the nylon layer does not contain an insulating coating.
Comparative example 2:
the preparation of the aluminum-plastic film material is the same as that of the embodiment 2, except that the surface of the nylon layer does not contain an insulating coating.
Comparative example 3:
the preparation of the aluminum-plastic film material is the same as that of example 3, except that the surface of the nylon layer does not contain the insulating coating.
The samples of examples 1 to 5 and comparative examples 1 to 3 were placed at 25 ℃ in a 50% RH atmosphere for 48 hours, and the breakdown voltage of each group of samples was measured; and continuously placing the samples for 48 hours at 85 ℃ and 85% RH, testing the breakdown voltage of each group of samples, and comparing the difference of the electrical insulation performance of the aluminum-plastic film under 2 environments.
As can be seen from the test results, the electric insulation performance of the utility model is obviously superior to that of the conventional aluminum-plastic film, and can still keep stronger insulation performance in the humid high-temperature environment. To sum up, the utility model discloses can effectively improve the electrical insulation performance of plastic-aluminum membrane in the high temperature and high humidity environment, the practicality is strong, and application scope is wide, and easy and simple to handle, has extensive application prospect.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more here: insulating coating 1, nylon layer 2, outer layer glue bond layer 3, upper chromized layer 4, aluminum foil layer 5, lower chromized layer 6, inner layer glue bond layer 7, cast polypropylene layer 8, wear resistant particles 9, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (10)
1. The utility model provides a flexible package of plastic-aluminum for lithium cell of novel structure which characterized in that: the coating comprises an insulating coating (1), a nylon layer (2), an outer glue bonding layer (3), an upper chromizing treatment layer (4), an aluminum foil layer (5), a lower chromizing treatment layer (6), an inner glue bonding layer (7) and a cast polypropylene layer (8) which are sequentially arranged from the outer side to the inner side; wherein, the inner and outer surfaces of the aluminum foil layer (5) are treated by trivalent chromium passivator to form an upper chromizing treatment layer (4) and a lower chromizing treatment layer (6); then the outer layer adhesive bonding layer (3) and the inner layer adhesive bonding layer (7) are compounded with the nylon layer (2) and the cast polypropylene layer (8), and the insulating coating (1) is coated on the outer surface of the nylon layer (2).
2. The aluminum plastic flexible package for the lithium battery with the novel structure as claimed in claim 1, is characterized in that: a plurality of wear-resistant particles (9) are formed on the insulating coating (1), and the wear-resistant particles (9) are equidistantly distributed on the insulating coating (1).
3. The aluminum plastic flexible package for the lithium battery with the novel structure as claimed in claim 2, is characterized in that: the insulating coating (1) is a water-soluble epoxy insulating coating.
4. The aluminum plastic flexible package for the lithium battery with the novel structure as claimed in claim 3, is characterized in that: the water-soluble epoxy insulating coating is polyol and anhydride modified epoxy resin, and the thickness of the water-soluble epoxy insulating coating is 3-10 mu m.
5. The aluminum plastic flexible package for the lithium battery with the novel structure as claimed in claim 1, is characterized in that: the thickness of the nylon layer (2) is 15-25 μm.
6. The aluminum plastic flexible package for the lithium battery with the novel structure as claimed in claim 1, is characterized in that: the outer layer adhesive bonding layer (3) is composed of polyurethane adhesive, and the thickness is 2-5 μm.
7. The aluminum plastic flexible package for the lithium battery with the novel structure as claimed in claim 1, is characterized in that: the thickness of the aluminum foil layer (5) is 35-40 μm.
8. The aluminum plastic flexible package for the lithium battery with the novel structure as claimed in claim 1, is characterized in that: the thickness of the upper chromizing layer (4) and the lower chromizing layer (6) is 0.2-1 μm.
9. The aluminum plastic flexible package for the lithium battery with the novel structure as claimed in claim 1, is characterized in that: the inner layer adhesive bonding layer (7) is composed of epoxy resin adhesive, and the thickness is 2-5 μm.
10. The aluminum plastic flexible package for the lithium battery with the novel structure as claimed in claim 1, is characterized in that: the thickness of the cast polypropylene layer (8) is 40 μm to 80 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920966110.1U CN210679941U (en) | 2019-06-25 | 2019-06-25 | Aluminum-plastic flexible package with novel structure for lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920966110.1U CN210679941U (en) | 2019-06-25 | 2019-06-25 | Aluminum-plastic flexible package with novel structure for lithium battery |
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| Publication Number | Publication Date |
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| CN210679941U true CN210679941U (en) | 2020-06-05 |
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|---|---|---|---|
| CN201920966110.1U Active CN210679941U (en) | 2019-06-25 | 2019-06-25 | Aluminum-plastic flexible package with novel structure for lithium battery |
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| Country | Link |
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| CN (1) | CN210679941U (en) |
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- 2019-06-25 CN CN201920966110.1U patent/CN210679941U/en active Active
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