CN214411339U

CN214411339U - Laminate polymer battery surface pad pasting and laminate polymer battery

Info

Publication number: CN214411339U
Application number: CN202120433483.XU
Authority: CN
Inventors: 王�锋; 邢瑞琪; 其他发明人请求不公开姓名
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-10-15
Anticipated expiration: 2031-02-26

Abstract

The utility model provides a laminate polymer battery surface pad pasting and laminate polymer battery, the utility model discloses a laminate polymer battery surface pad pasting for paste and cover on laminate polymer battery's plastic-aluminum membrane surface, with the surface of protection plastic-aluminum membrane, laminate polymer battery surface pad pasting includes the membrane body, and locate the latticed wire rod that is of membrane body one side. The film sticking on the surface of the soft package battery can reduce the contact area between the film body and the outer surface of the aluminum plastic film, thereby reducing the risk of damaging the aluminum plastic film and the bottom of the soft package battery due to the film tearing process so as to reduce the reject ratio of finished products; meanwhile, the latticed wire rods are arranged, so that the surface of the soft package battery can be conveniently pasted and torn on the aluminum plastic film, the use effect is good, and the soft package battery is worthy of popularization and use.

Description

Laminate polymer battery surface pad pasting and laminate polymer battery

Technical Field

The utility model relates to a laminate polymer battery pad pasting technical field, in particular to laminate polymer battery pad pasting, simultaneously, the utility model discloses still relate to a laminate polymer battery who is equipped with this laminate polymer battery pad pasting.

Background

The soft package battery (also called soft package lithium battery) is mainly composed of a positive electrode material, a negative electrode material, a diaphragm, electrolyte and an aluminum plastic film (nylon-aluminum layer-polypropylene) coated on the outermost layer. The soft package battery has the advantages of light weight, high battery energy density, small internal resistance, good safety performance, flexible design, excellent cycle and the like. However, in the manufacturing process of the battery, the nylon layer at the outermost layer of the aluminum-plastic film is very easy to be scratched by a machine to cause problems of damage, leakage, corrosion by an electrolyte solution and the like, so that after the top-sealed package or the top-bottom sealed package of the soft-package battery is completed, generally, the aluminum-plastic film needs to be covered with a film for protection, so as to reduce the risk of damage to the aluminum-plastic film.

In the prior art, due to process requirements, a film on an aluminum-plastic film needs to undergo multiple processes of baking, high-temperature pressurization formation, high-temperature standing, capacity grading or jig capacity grading, edge folding, battery film tearing and the like, and the aluminum-plastic film is easy to deform due to uneven stress. Wherein, in the dyestripping process, the pad pasting very easily causes the battery surface to produce slight "fold" or serious "strip hook" isotructure deformation phenomenon, and still leads to laminate polymer battery bottom to gouge easily, causes the product defective rate to increase, and then produces a large amount of outward appearance defective products and scrap article to make manufacturing cost increase. In addition, the use effect of the film sticking in the prior art is not good enough, especially when producing a soft package battery with a large area size, the sticking efficiency and the film tearing efficiency are low, and the fraction defective of the product is higher.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a laminate polymer battery surface pad pasting, reducible and the aluminium-plastic membrane surface area of contact, and excellent in use effect.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a laminate polymer battery surface pad pasting, a laminate polymer battery surface pad pasting for paste and cover on laminate polymer battery's plastic-aluminum membrane surface, with the protection the surface of plastic-aluminum membrane, laminate polymer battery surface pad pasting includes the membrane body, and locates the wire rod that is latticed of membrane body one side.

Further, the membrane body is made of a PET material.

Further, the thickness D1 of the membrane body is between 0.4 and 1 mm.

Further, the diameter D2 of the wire rod is between 0.05 mm and 0.3 mm.

Furthermore, the side length of the grid of the latticed wire rod is between 1 and 10 mm.

Further, a bonding glue layer is coated on the wire.

Compared with the prior art, the utility model discloses following advantage has:

the utility model discloses a laminate film on the surface of a soft package battery, through setting up the wire rod that is latticed in one side of the membrane body, can reduce the area of contact of membrane body and plastic-aluminum membrane surface, and then reduce and cause the risk of damage to plastic-aluminum membrane and soft package battery bottom because of dyestripping process to reduce the finished product defective rate; simultaneously, the wire rods arranged in the grid shape are also convenient for pasting and tearing off the film on the surface of the soft package battery on the aluminum plastic film, and the using effect is good.

In addition, the film body is made of PET material, has excellent mechanical properties such as strong toughness, high tensile strength and high impact strength, and can further form good protection for the aluminum plastic film. Meanwhile, the thickness of the film body is set to be 0.4-1mm, the diameter of the wire rod is set to be 0.05-0.3mm, the side length of the grids of the wire rod is set to be 1-10mm, and the wire rod is coated with the bonding glue layer.

Another object of the utility model is to provide a laminate polymer battery, laminate respectively on laminate polymer battery's the aluminium-plastic film's the both sides surface and cover as above laminate polymer battery surface pad pasting.

Further, laminate polymer battery's both sides have by the side seal limit that the plastic-aluminum membrane formed, both sides laminate polymer battery surface pad pasting all constitutes right the part of side seal is sheltered from, just laminate polymer battery surface pad pasting hides width L1 between 1-2mm, the width L2 of the part that the side seal is not covered is between 1-3 mm.

Further, two utmost point ears of laminate polymer battery are located same end, and in laminate polymer battery have the one end of utmost point ear, laminate polymer battery surface pad pasting the edge to length L3 that the edge of plastic-aluminum membrane extends outward is 3-6mm, and constitutes right the part that the utmost point ear of utmost point ear department was glued hides, in laminate polymer battery's the other end, laminate polymer battery surface pad pasting's marginal distance the distance L4 at the edge of plastic-aluminum membrane is 1-5 mm.

Further, two utmost point ears of laminate polymer battery are located both ends respectively, and in one of them the one end that utmost point ear was located, laminate polymer battery surface pad pasting the edge to length L3 that the edge of plastic-aluminum membrane extends outward is 3-6mm, and constitutes to this end the part that the utmost point ear of utmost point ear department was glued covers, in another the one end that utmost point ear was located, laminate polymer battery surface pad pasting's edge is apart from the distance L4 at the edge of plastic-aluminum membrane is 1-5 mm.

The soft package battery of the utility model can reduce the risk of deformation of the aluminum plastic film caused by inconsistent stress by using the film pasted on the surface of the soft package battery, thereby reducing the reject ratio of finished products; and the operation efficiency that laminate film covers and tears on the plastic-aluminum membrane on laminate film surface can be promoted, do benefit to the manufacturing of large tracts of land size laminate film battery. In addition, the surface adhesive films of the soft-package batteries on the two sides form part covering of the opposite side edge sealing, so that the adhering and tearing operations of the surface adhesive films of the soft-package batteries are facilitated; and laminate polymer battery surface pad pasting constitutes the part that glues to the utmost point ear of utmost point ear department and covers, the development of the subsequent handling of being convenient for, and then do benefit to the preparation efficiency that promotes laminate polymer battery.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a film attached to the surface of a pouch battery according to a first embodiment of the present invention;

fig. 2 is a side view of a laminate film on the surface of a pouch battery according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a pouch battery according to a second embodiment of the present invention;

fig. 4 is a side view of one of the pouch batteries according to the second embodiment of the present invention;

fig. 5 is another schematic structural diagram of a pouch battery according to a second embodiment of the present invention;

description of reference numerals:

1. pasting a film; 101. a membrane body; 102. a wire rod;

2. an aluminum-plastic film; 200. side edge sealing; 3. a tab; 4. gluing a tab;

d1, film bulk thickness; d2, wire diameter; l1, pasting a film on the surface of the soft-package battery to form a covering width of the opposite side edge seal; l2, width of the uncovered portion of the side seal; l3, the length of the edge of the film stuck on the surface of the soft package battery extending to the outside of the edge of the aluminum plastic film; l4, distance from the edge of the laminate film on the surface of the soft-package battery to the edge of the aluminum plastic film.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The embodiment relates to a laminate polymer battery surface pad pasting for paste and cover on laminate polymer battery's 2 surfaces of plastic-aluminum membrane to the surface of protection plastic-aluminum membrane 2, as shown in fig. 1 and fig. 2, laminate polymer battery surface pad pasting includes membrane body 101, and locates the wire rod 102 that is latticed of membrane body 101 one side. In the specific structure, the film body 101 is made of a PET material, so that the film body 101 has excellent mechanical properties such as high toughness, high tensile strength and high impact strength, and can further form good protection for the aluminum-plastic film 2.

It should be noted that the surface film of the pouch battery in the present embodiment is hereinafter referred to as a film 1 for convenience of description of relevant contents; in addition, the structures of the surface film of the soft package battery, which are not described in this embodiment, can be referred to the related structural parts of the surface film of the soft package battery in the prior art, and are not described herein again.

Meanwhile, as a preferred embodiment, as shown in fig. 1 and 2, the thickness D1 of the film body 101 is between 0.4 and 1mm, the diameter D2 of the wires 102 is between 0.05 and 0.3mm, the grid side length of the wires 102 in a grid shape is between 1 and 10mm, and the wires 102 are coated with an adhesive layer. This structure sets up rationally, and simple easy the realization does benefit to and promotes 1 result of use of pad pasting. It should be noted that the thickness of the film body 101, the diameter of the wire 102, and the length of the grid side of the wire 102 can be adjusted according to the actual situation and corresponding values in the corresponding value range, so as to obtain the relatively optimal use effect.

In specific implementation, the whole film 1 is connected with the surface of the aluminum plastic film 2 of the pouch battery only through the adhesive layer at the wire 102, and other parts of the film 1 are not bonded with the aluminum plastic film 2, so that the using effect of the film 1 described in the above can be achieved.

In the film for sticking the surface of the soft-package battery in the embodiment, the latticed wire 102 is arranged on one side of the film body 101, so that the contact area between the film body 101 and the outer surface of the aluminum-plastic film 2 can be reduced, the risk of damage to the aluminum-plastic film 2 and the bottom of the soft-package battery due to a film tearing process is further reduced, and the reject ratio of finished products is reduced; meanwhile, the latticed wires 102 are arranged, so that the film 1 can be conveniently attached to and torn from the aluminum-plastic film 2, and the use effect is good.

Example two

The present embodiment relates to a pouch battery, and as shown in fig. 1 to 5, the films 1 described in the first embodiment are respectively attached to the outer surfaces of both sides of an aluminum plastic film 2 of the pouch battery. Specifically, two sides of the soft package battery are provided with side sealing edges 200 formed by aluminum plastic films 2, the adhesive films 1 on the two sides form partial covering of the side sealing edges 200, the covering width L1 of the adhesive films 1 is 1-2mm, and the width L2 of the uncovered part of the side sealing edges 200 is 1-3mm, so that the covering and tearing operations of the adhesive films 1 are facilitated. It should be noted that, for each structure of the pouch battery not described in this embodiment, reference may be made to common structural parts in the prior art, and details are not described herein again.

In addition, as shown in fig. 5, as a form of the pouch battery, two tabs 3 of the pouch battery are located at the same end, and at one end of the pouch battery having the tabs 3, a length L3 of the edge of the film 1 extending outward to the edge of the aluminum plastic film 2 is 3-6mm, and constitutes a partial cover for the tab glue 4 at the tab 3, and at the other end of the pouch battery, a distance L4 of the edge of the film 1 from the edge of the aluminum plastic film 2 is 1-5mm, so as to facilitate the development of the subsequent processes.

Of course, in the present embodiment, in addition to the structure form that the two tabs 3 are located at the same end, as another structure form of the pouch battery, as shown in fig. 3, the two tabs 3 of the pouch battery are respectively located at two ends, and at the end where one tab 3 is located, the length L3 of the edge of the film 1 extending outward to the edge of the aluminum-plastic film 2 is 3-6mm, and forms a partial cover for the tab glue 4 at the end tab 3, and at the end where the other tab 3 is located, the distance L4 of the edge of the film 1 from the edge of the aluminum-plastic film 2 is 1-5mm, so as to obtain the same effect as that of one specific structure embodiment described above.

In the soft package battery in the embodiment, by using the film 1, the risk of deformation of the aluminum-plastic film 2 caused by inconsistent stress can be reduced, and the reject ratio of a finished product is further reduced; and the operation efficiency of pasting and tearing off the film 1 on the aluminum plastic film 2 can be improved, and the production and the manufacture of the soft package battery with large area and size are facilitated.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a laminate polymer battery surface pad pasting for paste and cover on laminate polymer battery's aluminium-plastic film (2) surface, in order to protect the surface of aluminium-plastic film (2), its characterized in that: laminate polymer battery surface pad pasting includes membrane body (101) and locates membrane body (101) one side be latticed wire rod (102).

2. The laminate film for the surface of the soft-package battery according to claim 1, is characterized in that: the film body (101) is made of PET materials.

3. The laminate film for the surface of the soft-package battery according to claim 1, is characterized in that: the thickness D1 of the film body (101) is between 0.4 and 1 mm.

4. The laminate film for the surface of the soft-package battery according to claim 1, is characterized in that: the diameter D2 of the wire (102) is between 0.05 and 0.3 mm.

5. The laminate film for the surface of the soft-package battery according to claim 1, is characterized in that: the grid side length of the wire (102) in the grid shape is between 1mm and 10 mm.

6. The laminate film for the surface of the soft-package battery according to any one of claims 1 to 5, which is characterized in that: and a bonding glue layer is coated on the wire (102).

7. The utility model provides a laminate polymer battery which characterized in that: the surface sticking films of the soft package battery in any one of claims 1 to 6 are respectively stuck on the outer surfaces of two sides of the aluminum plastic film (2) of the soft package battery.

8. The pouch cell according to claim 7, wherein: the both sides of laminate polymer battery have by side banding (200) that aluminium-plastic film (2) formed, both sides laminate polymer battery surface pad pasting all constitutes right the part of side banding (200) hides, just laminate polymer battery surface pad pasting hides width L1 between 1-2mm, the width L2 of the part that side banding (200) are not covered is between 1-3 mm.

9. The pouch cell according to claim 7, wherein: two utmost point ears (3) of laminate polymer battery are located same end, and in laminate polymer battery have the one end of utmost point ear (3), laminate polymer battery surface pad pasting the edge to the length L3 that the edge of plastic-aluminum membrane (2) extends outward is 3-6mm, and constitutes right the part that utmost point ear glue (4) of utmost point ear (3) department covers, in laminate polymer battery's the other end, laminate polymer battery surface pad pasting's marginal distance is 1-5mm at the distance L4 of the edge of plastic-aluminum membrane (2).

10. The pouch cell according to claim 7, wherein: two utmost point ears (3) of laminate polymer battery are located both ends respectively, and in one of it the one end that utmost point ear (3) were located, laminate polymer battery surface pad pasting the edge to length L3 that the edge of aluminium-plastic film (2) extends outward is 3-6mm, and constitutes to this end the part that utmost point ear glue (4) of utmost point ear (3) department covers, in another the one end that utmost point ear (3) were located, laminate polymer battery surface pad pasting's edge is apart from the distance L4 at the edge of aluminium-plastic film (2) is 1-5 mm.