CN215162314U

CN215162314U - Buffering gum structure and battery package

Info

Publication number: CN215162314U
Application number: CN202121432954.1U
Authority: CN
Inventors: 柯荣富
Original assignee: Fujian Tengbo New Material Technology Co ltd
Current assignee: Fujian Tengbo New Material Technology Co ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-12-14
Anticipated expiration: 2031-06-25

Abstract

The utility model discloses a buffering gum structure, including superimposed polyacrylic acid fat glue film, PET layer and acrylic acid fat glue film in proper order, and the whole thickness of this three-layer is [1.04mm,1.26mm ]. The utility model also discloses a battery package, including electric core subassembly and attached the one deck as above respectively in the both sides of one row of electric core subassembly a buffering gum structure. The utility model adopts the polyacrylate glue layer, the PET layer and the acrylate glue layer to form the gum with the thickness of [1.05mm,1.25mm ], one gum is respectively laminated on the left side and the right side of the battery pack to fill the 2mm clearance interference caused by the battery cell, the deviation generated by the existing manual superposition double faced adhesive tape is eliminated, the tensile strength is improved by the buffer damping capacity of the polyacrylate glue layer and the PET, and the clearance of the deviation of the battery cell can be perfectly filled in the thinning process; meanwhile, both sides of the battery pack are made of sticky acrylic materials, so that the back adhesive is still a double-sided adhesive tape, and the effect of perfectly filling the gap is achieved while the battery pack is tightly attached to an adherend.

Description

Buffering gum structure and battery package

Technical Field

The utility model belongs to battery gum makes the field, especially relates to and is used for a buffering gum structure and battery package.

Background

The common battery pack is composed of modules, each module comprises about 10 battery cores, and in order to break through the limit of the energy density of the battery, an original module structure is cancelled when a new structure is developed by a battery factory so that the battery cores are directly integrated into the battery pack, so that more battery cores can be placed into the same battery pack, and the energy density can be improved; however, the number of pole pieces in each cell at least exceeds 100, and if the thickness deviation of each pole piece layer is 1 micron, the number of cells in a row is between 20 and 30, and the deviation of 2mm is generated at least in total, so that the battery pack cannot be assembled. In order to solve the above problems, at present, a plurality of layers of battery back adhesives with the thickness of 0.2mm are stacked, and the gaps are filled to proper positions and then finally packaged, but the following problems are caused:

1. because the deviation gaps of each row of battery cores are not consistent, the quantity of the filling gaps is inconsistent, the shrinkage and expansion generated during the charging and discharging of the final battery are inconsistent, and the risk of safety risk and short service life is caused;

2. the filling gaps can only be overlapped manually, perfect overlapping cannot be guaranteed, and the problem of left and right unevenness exists, so that the performance of the double-sided adhesive tape is influenced;

3. the filling gap adopts a manual multiple overlapping mode, and the production rhythm is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the utility model provides a buffering gum structure and battery package to solve the above-mentioned novel battery and adopt the stack gum to fill the problem that the clearance exists.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows:

a buffering gum structure comprises a polyacrylate gum layer, a PET layer and an acrylate gum layer which are sequentially stacked;

the overall thickness of the polyacrylate adhesive layer, the PET layer and the acrylate adhesive layer is [1.04mm,1.26mm ].

Further, the thicknesses of the polyacrylate adhesive layer, the PET layer and the acrylate adhesive layer are [1.0mm,1.2mm ], [0.02mm,0.03mm ] and [0.02mm,0.03mm ], respectively.

Furthermore, the two surfaces of the PET layer, which are in contact with the polyacrylate adhesive layer and the acrylate adhesive layer, are both surfaces which are subjected to corona treatment.

Further, a first release layer is arranged on one surface, away from the PET layer, of the polyacrylate adhesive layer, and first silicone oil is coated on one surface, in contact with the polyacrylate adhesive layer, of the first release layer;

the one side that the acrylic acid ester glue film kept away from the PET layer is provided with the second and leaves the type layer, the second from the type layer with the one side coating that the acrylic acid ester glue film contacted has second silicone oil.

Further, the first release layer and the second release layer are release paper with different colors.

Further, the color of the first release layer is yellow, and the color of the second release layer is white.

Further, the release force of the first release layer is greater than that of the second release layer.

Further, the coating amount of the first silicone oil was [15g/inch,20g/inch ], and the coating amount of the second silicone oil was [5g/inch,10g/inch ].

Further, the lengths of the first release layer and the second release layer are longer than the polyacrylate adhesive layer, the PET layer or the acrylate adhesive layer by [2mm,4mm ].

In order to achieve the above technical purpose, the utility model discloses a another technical scheme who adopts as follows:

a battery pack comprises a battery core assembly and a buffer gum structure, wherein the buffer gum structure is attached to two sides of a row of battery core assemblies respectively.

The beneficial effects of the utility model reside in that: the utility model provides a buffering gum structure and battery package adopts polyacrylic acid resin layer, PET layer and acrylic acid resin layer to constitute the gum with thickness of [1.05mm,1.25mm ], can respectively laminate one on the left and right sides of battery package to fill the 2mm clearance interference that the electric core caused, eliminate the deviation that the existing artifical stack double faced adhesive tape produced, improve its tensile strength through the buffering shock-absorbing capacity cooperation PET of polyacrylic acid resin layer itself, can fill the clearance of electric core deviation perfectly in the process that the battery package is packed and is thinned; meanwhile, both sides of the battery pack are made of sticky acrylic materials, so that the back adhesive is still a double-sided adhesive tape, and the effect of perfectly filling the gap is achieved while the battery pack is tightly attached to an adherend.

Drawings

FIG. 1 is a schematic diagram of a 3D structure of a buffer gum structure;

FIG. 2 is a cross-sectional side view of a buffer backing structure.

Description of reference numerals:

1. a first release layer; 2. a polyacrylate adhesive layer; 3. a PET layer; 4. an acrylate adhesive layer; 5. a second release layer.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Before this, in order to facilitate understanding of the technical solution of the present invention, the following explanations are made for english abbreviations, specific nouns, and the like related to the present invention:

polyacrylate ester: the homopolymer or copolymer using acrylate as monomer has adhesion, firm adhesion, no peeling, flexibility and elasticity at room temperature, good weather resistance and low tensile strength.

PET: the polyester resin has good mechanical properties, impact strength 3-5 times that of other films, and good folding resistance.

It should be noted that, in the drawings of the present invention, the schematic structural diagrams of fig. 1 and fig. 2 only show the connection relationship and the position corresponding relationship of the layers constituting the cushion gum structure, the thickness ratio between the layers in the drawings does not represent the actual thickness ratio between the layers, and the thickness ratio between the specific layers is based on the description in the embodiments.

Referring to fig. 1 and 2, a buffer gum structure includes a polyacrylate gum layer, a PET layer, and an acrylate gum layer stacked in sequence;

As can be seen from the above description, the utility model has the advantages that: the back glue with the thickness of [1.05mm,1.25mm ] is formed by adopting the polyacrylate glue layer, the PET layer and the acrylate glue layer, one back glue can be respectively attached to the left side and the right side of the battery pack to fill the 2mm gap caused by the battery cell in an interference manner, the deviation generated by the existing manual superposition of double-sided glue is eliminated, the tensile strength of the battery pack is improved by matching the buffering and damping capacity of the polyacrylate glue layer with the PET, and the gap of the deviation of the battery cell can be perfectly filled in the process of packaging and thinning the battery pack; meanwhile, both sides of the battery pack are made of sticky acrylic materials, so that the back adhesive is still a double-sided adhesive tape, and the effect of perfectly filling the gap is achieved while the battery pack is tightly attached to an adherend.

From the above description, it can be known that the polyacrylate adhesive layer is a copolymer of acrylate, and has acrylate viscosity, and simultaneously, the elasticity of the polyacrylate adhesive layer is amplified to form a unique viscoelastic body, so that the viscoelastic body has buffering and damping effects, and the thickness of the polyacrylate adhesive layer is larger and is used as a main part for filling the gap.

As can be seen from the above description, corona treatment can increase the surface energy of the two sides of the PET layer, and one side of the PET layer after corona treatment is attached with the polyacrylate adhesive layer and the other side is attached with the acrylic adhesive layer, so that the polyacrylate adhesive layer and the acrylic adhesive layer are tightly combined together.

It can be known from the above-mentioned description, first from type layer and second from the type layer and be used for protecting polyacrylic acid resin glue film and acrylic acid resin glue film respectively, thereby carry out two-sided pasting through tearing off the type layer when using, coated silicone oil on the type layer simultaneously, can guarantee to have certain from the type force from the type layer, be difficult for being torn and destroyed because of other external force factors etc. when not using.

As can be seen from the above description, the provision of different colors can facilitate distinguishing which release layer is attached to the battery pack side and which release layer is attached to the adherend side.

The description shows that the side with low release force is better torn, so that the second release layer is firstly torn and adhered to the adhered object in the manual operation, and the first release layer is torn after the adhesion is finished, so that the manual and rapid operation can be facilitated; simultaneously because the one side after first type layer is torn is the polyacrylic ester glue film, need fill the clearance of electric core deviation, consequently the laminating of battery package and polyacrylic ester glue film should paste battery package and polyacrylic ester glue film again after acrylic ester glue film one side is pasted, makes its clearance that can perfectly fill the electric core deviation through battery package compression polyacrylic ester glue film.

As can be seen from the above description, the release force of the release layer is controlled by controlling the coating amount of the silicone oil.

As can be seen from the above description, the release layer is added by a certain length, so that the release layer can be conveniently torn manually.

As can be seen from the above description, the utility model has the advantages that: based on the same technical concept, the buffer gum structure is adopted and is respectively attached to the two sides of the battery pack, the gum with the thickness of [1.05mm,1.25mm ] is formed by adopting the polyacrylate gum layer, the PET layer and the acrylate gum layer, the left side and the right side of the battery pack can be respectively attached with one gum so as to fill a 2mm gap caused by a battery cell in an interference manner, the deviation generated by the existing manual superposition of double faced adhesive tapes is eliminated, the tensile strength of the battery pack is improved by matching the buffer damping capacity of the polyacrylate gum layer with the PET, and the gap of the deviation of the battery cell can be perfectly filled in the process of packaging and thinning the battery pack; meanwhile, both sides of the battery pack are made of sticky acrylic materials, so that the back adhesive is still a double-sided adhesive tape, and the effect of perfectly filling the gap is achieved while the battery pack is tightly attached to an adherend.

Referring to fig. 1 and fig. 2, a first embodiment of the present invention is:

the utility model provides a buffering gum structure, as shown in figure 1, including the first type layer 1 that stacks in proper order, polyacrylate glue film 2, PET layer 3, acrylate glue film 4 and second from type layer 5.

In this embodiment, the first release layer 1 and the second release layer 5 are respectively used for protecting the polyacrylate adhesive layer 2 and the acrylate adhesive layer 4, and the release layers need to be torn off when in use.

In the embodiment, the polyacrylate adhesive layer 2 and the acrylate adhesive layer 4 are both made of sticky acrylic materials, so that the cache back adhesive has a double-sided adhesive structure, and can be pasted on two sides after the first release layer 1 and the second release layer 5 are torn off, so as to ensure that the battery pack is tightly attached to an adherend; the polypropylene resin adhesive layer 2 not only has acrylate viscosity, but also amplifies elasticity, has extremely strong buffering and damping effects, but also has low tensile strength due to copolymerization of acrylate, and can generate transverse deformation in the compression process, so that the tensile strength can be improved by matching with the PET layer 3, and the polypropylene resin adhesive layer serves as a surface which is attached to a battery pack and can be perfectly filled into a gap of a cell deviation in the process of packaging and thinning the battery pack; simultaneously, the thickness of polyacrylic acid resin layer 2, PET layer 3 and acrylic acid ester glue film 4 adopts 1.1mm, 0.025mm and 0.025mm respectively, and whole thickness is 1.15mm promptly, through respectively laminating one on both sides about the battery package, the thickness of two buffering gum is 2.3mm altogether promptly, can pack the clearance interference of 2mm of electric core to the battery, and because respectively laminate one about only the battery package, so do not have the deviation that artifical stack produced. In other equivalent embodiments, the overall thickness of the three layers is only required to ensure that 2mm gaps can be filled in an interference manner after the battery packs are attached to the left and right sides of each battery pack, but in order to save cost, the thickness of the three layers cannot be too thick, so that the thicknesses of the polyacrylate adhesive layer 2, the PET layer 3 and the acrylate adhesive layer 4 are respectively limited to [1.0mm,1.2mm ], [0.02mm,0.03mm ] and [0.02mm,0.03mm ] as the optimal thickness range, namely the overall thickness is [1.04mm,1.26mm ].

In this embodiment, the two-sided surface that has been through corona treatment with polyacrylate glue film 2 and contact of acrylate glue film 4 on PET layer 3, corona treatment can increase the two-sided surface energy on PET layer 3, and PET layer 3 one side laminating polyacrylate glue film 2 after corona treatment, one side laminating acrylate glue film 4 enable polyacrylate glue film 2 and acrylate glue film 4 closely combine together.

In this embodiment, the first surface of the first release layer 1 contacting the polyacrylate adhesive layer 2 is coated with first silicone oil, and the second surface of the second release layer 5 contacting the acrylate adhesive layer 4 is coated with second silicone oil, wherein the silicone oil ensures that the release layer has a certain release force, and is not easy to be torn off and damaged due to other external factors when not in use.

In this embodiment, the coating amount of the first silicone oil is [15g/inch,20g/inch ], the coating amount of the second silicone oil is [5g/inch,10g/inch ], that is, the release force of the release layer is controlled by controlling the coating amount of the silicone oil, so that the release force of the first release layer 1 is greater than that of the second release layer 5. Because the side with low release force is better torn, the second release layer 5 is firstly torn and adhered on the adhered object during manual operation, and the first release layer 1 is torn after adhesion, so that the manual and rapid operation can be facilitated; simultaneously because the one side after first type layer 1 tears is polyacrylate glue film 2, need fill the clearance of electric core deviation, consequently battery package and the laminating of polyacrylate glue film 2 should paste battery package and polyacrylate glue film 2 again after 4 one sides of acrylate glue film paste, make its clearance that can perfect filling electric core deviation through battery package compression polyacrylate glue film 2.

Wherein, in this embodiment, the first colour of leaving type layer 1 is yellow, and the second colour of leaving type layer 5 is white, can be convenient for distinguish which one side from the type layer and paste on battery package one side and which one side from the type layer and paste on the adherend one side, in other equal embodiments, first from type layer 1 and second from type layer 5 for different colours from type paper can.

In addition, in the embodiment, as shown in fig. 2, the lengths of the first release layer 1 and the second release layer 5 are longer than the lengths of the polyacrylate glue layer 2, the PET layer 3, or the acrylate glue layer 4[2mm,4mm ], that is, the release layers need to be longer than a certain length so as to be easily torn by a human.

The embodiment of the utility model discloses an embodiment two is:

on the basis of the first embodiment, the present embodiment provides a battery pack, which includes a battery cell assembly and a buffer gum structure attached to two sides of a row of battery cell assemblies respectively.

To sum up, the utility model provides a pair of buffering gum structure and battery package adopts first from type layer, polyacrylate glue film, the PET layer, acrylate glue film and second from type layer stack in proper order and constitute the certain gum of thickness, leave type layer through tearing first from type layer and second when using, and each laminating one about the battery package both sides with the 2mm clearance interference packing that causes electric core, eliminate the deviation that current artifical stack double faced adhesive tape produced, buffering shock-absorbing capacity cooperation PET through polyacrylate glue film itself improves its tensile strength, can be at the clearance of the perfect packing electric core deviation of the in-process that the battery package encapsulation was thined. Wherein, the PET layer has increased surface energy through corona treatment, has not only strengthened the tensile strength of polyacrylic ester glue film, still makes polyacrylic ester glue film and acrylic ester glue film can combine together more closely, makes the both sides of gum still be the double faced adhesive tape, reaches the effect in perfect packing clearance when guaranteeing that battery package and adherend laminating are inseparable. Simultaneously, it is first from type layer and second to have certain from type force from the type layer, be difficult for because other external force factors etc. are torn and are destroyed, not only play the effect of protection gum two-sided, also make things convenient for the manual work to tear fast and carry out the operation of laminating, and from the type layer certain length that exceeds, also further made things convenient for the manual work to tear from the type layer.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. A buffering gum structure is characterized by comprising a polyacrylate gum layer, a PET layer and an acrylate gum layer which are sequentially stacked;

2. The structure of claim 1, wherein the thicknesses of the polyacrylate adhesive layer, the PET layer and the acrylate adhesive layer are [1.0mm,1.2mm ], [0.02mm,0.03mm ] and [0.02mm,0.03mm ], respectively.

3. The structure of claim 1, wherein both sides of the PET layer in contact with the polyacrylate adhesive layer and the acrylate adhesive layer are corona treated surfaces.

4. The buffering adhesive-backed structure according to claim 1, wherein a first release layer is disposed on a surface of the polyacrylate adhesive layer away from the PET layer, and a surface of the first release layer in contact with the polyacrylate adhesive layer is coated with a first silicone oil;

5. The cushion gum structure of claim 4, wherein the first release layer and the second release layer are release paper with different colors.

6. The structure of claim 5, wherein the first release layer is yellow and the second release layer is white.

7. The cushion gum structure of claim 4, wherein a release force of the first release layer is greater than a release force of the second release layer.

8. The structure of claim 7, wherein the first silicone oil is applied at a rate of [15g/inch,20g/inch ], and the second silicone oil is applied at a rate of [5g/inch,10g/inch ].

9. The cushion gum structure of claim 4, wherein the first release layer and the second release layer each have a length longer than the polyacrylate glue layer, the PET layer, or the acrylate glue layer [2mm,4mm ].

10. A battery pack comprising a plurality of cell assemblies and a plurality of cushion gum structures according to any one of claims 1 to 3 attached to each side of a row of cell assemblies.