CN210073925U

CN210073925U - Aluminum-plastic film structure for lithium battery

Info

Publication number: CN210073925U
Application number: CN201921332445.4U
Authority: CN
Inventors: 曾金生; 唐德富
Original assignee: Huizhou Dianmeng New Energy Technology Co Ltd
Current assignee: Huizhou Dianmeng New Energy Technology Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-02-14
Anticipated expiration: 2029-08-16

Abstract

The utility model relates to an aluminum-plastic membrane structure that lithium cell was used, by outer to interior nylon layer, aluminium foil layer, the heat-seal layer of including in proper order, be provided with first bond line and first gauze between nylon layer and the aluminium foil layer, be provided with second bond line and second gauze between aluminium foil layer and the heat-seal layer, first gauze and second gauze all with aluminium foil layer direct contact. The utility model provides an aluminum-plastic membrane structure that lithium cell was used is provided with the gauze among its inner layer structure, is showing the separation nature that has improved the aluminum-plastic membrane for the aluminum-plastic membrane has better puncture resistance, high temperature resistant, insulating nature, effectively strengthens product property ability.

Description

Aluminum-plastic film structure for lithium battery

Technical Field

The utility model relates to a lithium cell field especially relates to an aluminum-plastic membrane structure that lithium cell was used.

Background

The aluminum plastic film is a multilayer film consisting of an outer nylon layer, an adhesive, a middle aluminum foil layer, an adhesive and an inner heat sealing layer, and is a packaging material of a soft package lithium battery. The industry requires that the aluminum-plastic film has the advantages of extremely high barrier property, good cold stamping formability, good puncture resistance, high temperature resistance, strong insulating property and the like, so people need to continuously improve the structure of the existing aluminum-plastic film so as to obtain the aluminum-plastic film with better performance.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an aluminum-plastic membrane structure that lithium cell was used is provided with the gauze in its inner layer structure, is showing the separation nature that has improved the aluminum-plastic membrane for the aluminum-plastic membrane has better puncture resistance, high temperature resistant, insulating nature, effectively strengthens product property ability.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides an aluminum-plastic membrane structure for lithium cell, includes nylon layer, aluminium foil layer, heat-seal layer from outer to interior in proper order, is provided with first bond line and first gauze between nylon layer and the aluminium foil layer, is provided with second bond line and second gauze between aluminium foil layer and the heat-seal layer, and first gauze and second gauze all do not all with aluminium foil layer direct contact.

Preferably, the first mesh is completely surrounded by the first adhesive layer.

Preferably, the second mesh is completely surrounded by the second adhesive layer.

Preferably, one side surface of the aluminum foil layer is a matte surface, the other side surface is a smooth surface, the matte surface is attached to the first bonding layer, the smooth surface is attached to the protective layer, one side surface of the protective layer is attached to the smooth surface, and the other side of the protective layer is attached to the second bonding layer.

Preferably, the length and width dimensions of the first gauze are equal to those of the aluminum foil layer, and a plurality of first gauzes stacked in sequence can be wrapped in the first adhesive layer.

Preferably, the first gauze is strip-shaped, the length of the first gauze is smaller than the width of the aluminum foil layer, and a plurality of first gauzes which are sequentially arranged at intervals can be wrapped in the first bonding layer.

Preferably, the length and width dimensions of the second gauze are equal to those of the aluminum foil layer, and a plurality of second gauzes stacked in sequence can be wrapped in the second adhesive layer.

Preferably, the second gauze is strip-shaped, the length of the second gauze is smaller than the width of the aluminum foil layer, and a plurality of second gauzes which are sequentially arranged at intervals can be wrapped in the second bonding layer.

The utility model discloses compare in prior art's beneficial effect and be:

the utility model discloses plastic-aluminum membrane structure that lithium cell was used is provided with the gauze between nylon layer, aluminium foil layer, and also is provided with the gauze between aluminium foil layer, heat-seal layer, through set up the gauze in inner layer structure, can show the separation nature that has improved the plastic-aluminum membrane for the plastic-aluminum membrane has better puncture resistance, high temperature resistant, insulating nature, effectively strengthens product property ability.

Drawings

Fig. 1 is a three-dimensional cross-sectional view of an aluminum-plastic film structure for a lithium battery in embodiment 1 of the present invention.

Fig. 2 is a three-dimensional cross-sectional view of an aluminum-plastic film structure for a lithium battery in embodiment 2 of the present invention.

Detailed Description

To facilitate understanding of those skilled in the art, the present invention will be described in further detail with reference to specific embodiments and drawings.

Referring to fig. 1, an embodiment 1 of the present invention includes:

the utility model provides an aluminum-plastic membrane structure for lithium cell, from outer to interior includes nylon layer 11 in proper order, aluminium foil layer 12, heat-seal layer 13, be provided with first bond line 14 and first gauze 15 between nylon layer 11 and the aluminium foil layer 12, be provided with second bond line 16 and second gauze 17 between aluminium foil layer 12 and the heat-

seal layer

13, 12 side surfaces of aluminium foil layer are dull plain noodles, the opposite side surface is the plain noodles, dull plain noodles and the laminating of first bond line 14, the plain noodles is laminated with

protective layer

18, 18 side surfaces of protective layer are laminated with the plain noodles, the opposite side is laminated with second bond line 16. Neither the first screen 15 nor the second screen 17 is in direct contact with the aluminium foil layer 12. The first mesh 15 is completely wrapped by the first adhesive layer 14. The second mesh 17 is completely wrapped by the second adhesive layer 16. The first gauze 15 is strip-shaped, the length of the first gauze 15 is less than or equal to the width of the aluminum foil layer 12, a plurality of first gauzes 15 which are sequentially arranged at intervals can be wrapped in the first bonding layer 14, and the adjacent first gauzes 15 are arranged at equal intervals. The second gauze 17 is strip-shaped, the length of the second gauze 17 is less than or equal to the width of the aluminum foil layer 12, a plurality of second gauzes 17 which are sequentially arranged at intervals can be wrapped in the second adhesive layer 16, and the adjacent second gauzes 17 are arranged at equal intervals.

Referring to fig. 2, embodiment 2 of the present invention includes:

the utility model provides an aluminum-plastic membrane structure for lithium cell, from outer to interior includes nylon layer 21 in proper order, aluminium foil layer 22, heat-seal layer 23, be provided with first bond line 24 and first gauze 25 between nylon layer 21 and the aluminium foil layer 22, be provided with second bond line 26 and second gauze 27 between aluminium foil layer 22 and the heat-seal layer 23, aluminium foil layer 22 side surface is dull plain noodles, the opposite side surface is the plain noodles, dull plain noodles and the laminating of first bond line 24, the plain noodles is laminated with protective layer 28, protective layer 28 side surface and plain noodles laminating, the opposite side is laminated with second bond line 26. Neither the first screen 25 nor the second screen 27 is in direct contact with the aluminium foil layer 22. The first mesh 25 is completely wrapped by the first adhesive layer 24. The second screen 27 is completely wrapped by the second adhesive layer 26. The first gauze 25 has a length and a width equal to those of the aluminum foil layer 22, and a plurality of first gauzes 25 stacked in sequence may be wrapped in the first adhesive layer 24. The second gauze 27 has a length and a width equal to those of the aluminum foil layer 22, and a plurality of second gauzes 27 stacked in sequence may be wrapped in the second adhesive layer 26.

In the aluminum plastic film structure for a lithium battery in embodiments 1 and 2, the gauze is arranged between the nylon layer and the aluminum foil layer, and the gauze is also arranged between the aluminum foil layer and the heat seal layer, and by arranging the gauze in the inner layer structure, the barrier property of the aluminum plastic film can be significantly improved, so that the aluminum plastic film has better puncture resistance, high temperature resistance and insulation property, and the product performance is effectively enhanced.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. The aluminum-plastic film structure for the lithium battery sequentially comprises a nylon layer, an aluminum foil layer and a heat sealing layer from outside to inside, and is characterized in that a first bonding layer and a first gauze are arranged between the nylon layer and the aluminum foil layer, a second bonding layer and a second gauze are arranged between the aluminum foil layer and the heat sealing layer, and the first gauze and the second gauze are not in direct contact with the aluminum foil layer.

2. The aluminum plastic film structure for a lithium battery as claimed in claim 1, wherein the first gauze is completely wrapped by the first adhesive layer.

3. The aluminum plastic film structure for a lithium battery as claimed in claim 1, wherein the second gauze is completely wrapped by the second adhesive layer.

4. The aluminum-plastic film structure for the lithium battery as recited in claim 1, wherein one side surface of the aluminum foil layer is a matte surface, the other side surface of the aluminum foil layer is a smooth surface, the matte surface is attached to the first adhesive layer, the smooth surface is attached to the protective layer, one side surface of the protective layer is attached to the smooth surface, and the other side of the protective layer is attached to the second adhesive layer.

5. The aluminum plastic film structure for a lithium battery as claimed in claim 2, wherein the first gauze has a length and width dimension equal to that of the aluminum foil layer, and a plurality of first gauze stacked in sequence may be wrapped in the first adhesive layer.

6. The aluminum plastic film structure for the lithium battery as claimed in claim 2, wherein the first gauze is strip-shaped, the length of the first gauze is less than the width of the aluminum foil layer, and a plurality of first gauzes arranged at intervals in sequence can be wrapped in the first adhesive layer.

7. The aluminum plastic film structure for a lithium battery as claimed in claim 3, wherein the second gauze has a length and width dimension equal to that of the aluminum foil layer, and a plurality of second gauzes stacked in sequence are wrapped in the second adhesive layer.

8. The aluminum plastic film structure for the lithium battery as claimed in claim 3, wherein the second gauze is strip-shaped, the length of the second gauze is less than the width of the aluminum foil layer, and a plurality of second gauzes arranged at intervals in sequence can be wrapped in the second adhesive layer.