阅读说明：本技术 包装膜及电池 (Packaging film and battery ) 是由 刘灼鹏 唐威 于 2020-03-31 设计创作，主要内容包括：一种包装膜,包括聚苯二甲酰苯二胺纤维、第一胶层及第一印刷层。所述聚苯二甲酰苯二胺纤维包括第一表面及背对所述第一表面的第二表面。所述聚苯二甲酰苯二胺纤维上开设有缺口。所述第一胶层设置于所述第一表面,所述第一印刷层设置于所述第二表面。本申请还提供了一种具有所述包装膜的电池。(A packaging film comprises poly phenylene terephthamide fibers, a first adhesive layer and a first printing layer. The polyphenylene terephthalamide fiber comprises a first surface and a second surface opposite to the first surface. The poly benzene diformyl phenylenediamine fiber is provided with a gap. The first glue layer is arranged on the first surface, and the first printing layer is arranged on the second surface. The application also provides a battery with the packaging film.)

1. A packaging film, comprising:

the polyphenylene terephthalamide fiber comprises a first surface and a second surface back to the first surface, and is provided with a notch; and

first glue film and first printing layer, first glue film set up in the first surface, first printing layer set up in the second surface.

2. The packaging film of claim 1, wherein the poly (phenylene terephthalamide) fibers comprise a first edge and a second edge opposite the first edge in a length direction of the packaging film, wherein the notch is formed by the second edge being recessed in a direction toward the first edge, and wherein the poly (phenylene terephthalamide) fibers further comprise a handle film sheet positioned in the notch and formed by extending the poly (phenylene terephthalamide) fibers.

3. The packaging film according to claim 1 or 2, wherein the first surface comprises a first adhesive-free area, a first strong adhesive area, a second adhesive-free area, a first weak adhesive area, a third adhesive-free area, a second weak adhesive area and a second strong adhesive area which are sequentially arranged in the length direction of the packaging film, and the notch is located on one side of the first surface, which is far away from the first strong adhesive area.

4. The packaging film of claim 3, wherein the second surface comprises a fourth non-adhesive area, a third strong-adhesive area, a fifth non-adhesive area, a fourth strong-adhesive area and a sixth non-adhesive area sequentially arranged from the first strong-adhesive area to the notch.

5. The packaging film of claim 2, wherein the first surface comprises a third weak adhesive region, a first strong adhesive region, a second non-adhesive region, a first weak adhesive region, a third non-adhesive region, a second weak adhesive region and a second strong adhesive region, which are sequentially arranged from the first edge to the second edge, and the notch is located on a side of the first surface away from the third weak adhesive region.

6. The packaging film of claim 5, wherein the second surface comprises a first printed area, a fourth glue-free area, a third glue-strong area, a fifth glue-free area, a fourth glue-strong area, a sixth glue-free area and a second printed area sequentially arranged from the first edge to the second edge.

7. The packaging film of any one of claims 2, 4-6, wherein the handle film sheet comprises a first handle portion, a second handle portion, and a third handle portion, the first handle portion being located within the notch and extending away from the first edge and beyond the second edge; the first handle part is connected with the poly phenylene terephthalamide fiber, and the second handle part and the third handle part are connected with the second edge and are respectively connected with two sides of the first handle part.

8. The packaging film of claim 7, wherein the first handle portion comprises an upper surface, and the upper surface comprises a first non-adhesive zone, a first adhesive zone, a second non-adhesive zone, a second adhesive zone, and a third non-adhesive zone sequentially disposed from the first edge to the second edge.

9. The packaging film of claim 1, further comprising a second adhesive layer and a second printed layer, the second adhesive layer being connected between the second printed layer and the first printed layer.

10. A battery comprising a battery body, wherein the battery further comprises the packaging film of any one of claims 1-9, the packaging film covering the battery body.

Technical Field

The application relates to the field of batteries, in particular to a packaging film and a battery with the same.

Background

The PET (polyethylene terephthalate) protective film used in the existing lithium battery has the defects of poor flame retardance, poor high temperature resistance, poor corrosion resistance and the like. In addition, because the PET protection film is structurally simple in function, a PACK assembly plant needs a large amount of manpower and material resources to complete the assembly of the PET protection film, so that the production cost is increased, and the assembly and production efficiency are low.

Disclosure of Invention

In view of the above, it is desirable to provide a packaging film to solve the above problems.

A packaging film, comprising:

a polyphenylene terephthalamide fiber comprising a first surface and a second surface opposite the first surface; the poly phenylene terephthalamide fiber is provided with a gap; and

first glue film and first printing layer, first glue film set up in the first surface, first printing layer set up in the second surface.

Optionally, in the length direction of the packaging film, the polyphenylene terephthalamide fiber comprises a first edge and a second edge opposite to the first edge, the notch is formed by the second edge being concave towards the first edge, the polyphenylene terephthalamide fiber further comprises a handle membrane, the handle membrane is positioned in the notch and is formed by extending the polyphenylene terephthalamide fiber; the pull handle membrane is poly phenylene terephthalamide fiber.

Optionally, in the length direction of the packaging film, the first surface includes a first non-adhesive region, a first strong-adhesive region, a second non-adhesive region, a first weak-adhesive region, a third non-adhesive region, a second weak-adhesive region, and a second strong-adhesive region, which are sequentially disposed, and the notch is located on one side of the first surface, which is far away from the first strong-adhesive region.

Optionally, the second surface includes a fourth non-glue area, a third non-glue area, a fifth non-glue area, a fourth non-glue area, and a sixth non-glue area sequentially arranged from the first non-glue area to the notch direction.

Optionally, the first surface includes a third weak glue area, a first strong glue area, a second non-glue area, a first weak glue area, a third non-glue area, a second weak glue area, and a second strong glue area, which are sequentially arranged from the first edge to the second edge, and the notch is located on one side of the first surface, which is far away from the third weak glue area.

Optionally, the second surface includes a first printing area, a fourth glue-free area, a third glue-strong area, a fifth glue-free area, a fourth glue-strong area, a sixth glue-free area, and a second printing area, which are sequentially arranged from the first edge to the second edge.

Optionally, the handle membrane comprises a first handle part, a second handle part and a third handle part, wherein the first handle part is positioned in the gap and extends back to the first edge direction and beyond the second edge; the first handle part is connected with the poly phenylene terephthalamide fiber, and the second handle part and the third handle part are connected with the second edge and are respectively connected with two sides of the first handle part.

Optionally, first handle portion includes the upper surface, the upper surface include by first edge to first no viscose district, first viscose district, second no viscose district, second viscose district and the third no viscose district that second edge direction set gradually.

Optionally, the packaging film further comprises a second adhesive layer and a second printing layer, wherein the second adhesive layer is connected between the second printing layer and the first printing layer.

A battery comprises a battery body and the packaging film, wherein the packaging film covers the battery body.

In conclusion, the PET protective film adopts the poly (phenylene terephthalamide) fiber to replace a traditional PET (polyethylene terephthalate) protective film, so that the defects of poor flame retardance, poor high temperature resistance, poor corrosion resistance and the like of the traditional PET protective film are overcome. Secondly, the poly phenylene terephthalamide fiber is provided with a gap or a handle diaphragm is integrated on the poly phenylene terephthalamide fiber, so that the separation of a packaging film and a battery body is facilitated, and the battery body is prevented from being damaged. In addition, the poly phenylene terephthamide fiber can also be integrated with an adhesive layer, a printing layer and the like, so that the investment of various devices (such as an automatic pad printing machine or a jet printing machine, a PET (polyethylene terephthalate) easy-to-stick device and a double-sided adhesive tape sticking device) during the assembly of the battery is reduced, the assembly efficiency of the battery is greatly improved, and the production cost is reduced.

Drawings

Fig. 1 is a schematic front view of a battery according to an embodiment of the present disclosure.

Fig. 2 is a schematic view of the back side of the battery shown in fig. 1.

FIG. 3 is a schematic representation of the polyphenylene terephthalamide fiber shown in FIG. 1.

Fig. 4 is a schematic view of the packaging film shown in fig. 3 at another viewing angle.

Fig. 5 is a schematic cross-sectional view of a packaging film according to an embodiment of the present application.

FIG. 6 is a schematic view of a polyphenylene terephthalamide fiber and a handle membrane according to one embodiment of the present application.

FIG. 7 is a schematic representation of the polyphenylene terephthalamide fiber and handle membrane of FIG. 6 from another perspective.

Fig. 8 is a schematic front view of a battery according to another embodiment of the present application.

Fig. 9 is a schematic view of the back side of the cell shown in fig. 8.

FIG. 10 is a schematic representation of the polyphenylene terephthalamide fiber and pulling grip membrane sheet of FIG. 6 in yet another embodiment.

Fig. 11 is a schematic cross-sectional view of a packaging film according to yet another embodiment of the present application.

FIG. 12 is a schematic view of a polyphenylene terephthalamide fiber and a handle membrane according to yet another embodiment of the present application.

FIG. 13 is a schematic representation of the polyphenylene terephthalamide fiber and handle membrane of FIG. 12 from another perspective.

Fig. 14 is a schematic front view of a battery according to yet another embodiment of the present application.

Fig. 15 is a schematic cross-sectional view of a packaging film according to still another embodiment of the present application.

Description of the main elements

Battery 100

Packaging film 10

Poly (phenylene terephthalamide) fibers 11

First surface 111

First non-adhesive zone 1111

First Strong adhesive region 1112

Second non-glue area 1113

First weak glue region 1114

Third glue-free zone 1115

Second weak glue region 1116

Second strong glue area 1117

Third weak glue area 1118

Second surface 112

Fourth non-glue region 1121

Third Strong adhesive region 1122

Fifth glue free area 1123

Fourth Strong adhesive zone 1124

Sixth non-adhesive region 1125

First printed area 1126

Second printed area 1127

Notch 113

First edge 114

Second edge 115

Bottom edge 116

Side 117

Easy tear line 118

Gap 119

First adhesive layer 12

First printed layer 13

Third printed layer 14

First release layer 15

Handle diaphragm 16

First handle part 161

Second handle part 162

Third handle part 163

Upper surface 164

First non-adhesive area 1641

First adhesive area 1642

Second non-adhesive area 1643

Second adhesive area 1644

Third non-adhesive area 1645

Lower surface 165

Second adhesive layer 17

Second release layer 18

Second printed layer 19

Battery body 20

Front surface 201

Back side 202

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Fig. 1 is a schematic front view of the battery 100, and fig. 2 is a schematic rear view of the battery 100. In order to better show the positions of the packaging film 10 and the battery body 20, the packaging film 10 in fig. 1 and 2 is set in a transparent state.

Referring to fig. 1 and 2, the present application discloses a battery 100 including a packaging film 10 and a battery body 20. The packaging film 10 covers the outer surface of the battery body 20. The battery body 20 includes a front surface 201 and a back surface 202 opposite to the front surface 201.

Referring to fig. 5, the packaging film 10 includes a poly phenylene terephthalamide fiber 11, a first adhesive layer 12, and a first printing layer 13. Referring to fig. 3 and 4, the polyphenylene terephthalamide fiber 11 includes a first surface 111 and a second surface 112 opposite to the first surface 111. The poly phenylene terephthalamide fiber 11 is provided with a notch 113. The first adhesive layer 12 is disposed on the first surface 111, and the first printing layer 13 is disposed on the second surface 112. In this embodiment, the notch 113 is provided to facilitate the tearing of the packaging film 10 from the battery body 20, so as to avoid the damage to the battery body. Wherein the notch 113 is substantially in the shape of a rounded rectangle. In other embodiments, the shape of the notch 113 can be adjusted according to actual needs, and may be a regular shape such as a diamond shape, a circle shape, or other irregular shapes.

Further, referring to fig. 5, the packaging film 10 may further include a third printed layer 14 and a first release layer 15. The third printing layer 14 is disposed between the first release layer 15 and the first adhesive layer 12. Wherein the first release layer 15 is provided for protecting the unused packaging film 10.

In this embodiment, referring to fig. 3, in the longitudinal direction (i.e., the X-axis direction) of the packaging film 10, the first surface 111 includes a first non-glue region 1111, a first strong-glue region 1112, a second non-glue region 1113, a first weak-glue region 1114, a third non-glue region 1115, a second weak-glue region 1116 and a second strong-glue region 1117, which are sequentially disposed. The notch 113 is located on a side of the first surface 111 away from the first strong glue area 1112.

In another embodiment, referring to fig. 6 and 7, the polyphenylene terephthalamide fibers 11 include a first edge 114 and a second edge 115 opposite the first edge 114 in the length direction of the packaging film 10. The first edge 114 is far away from the second strong glue area 1117 relative to the second edge 115. The notch 113 is formed by the second edge 115 being recessed toward the first edge 114. The polyphenylene terephthalamide fiber 11 also includes a pulling grip membrane 16. The handle membrane 16 is located in the notch 113 and is formed by extending the poly (phenylene terephthalamide) fiber 11. The pulling film 16 is provided to facilitate the tearing of the packaging film 10 from the battery body 20, thereby avoiding damage to the battery body.

Specifically, referring to fig. 6, the handle film 16 includes a first handle portion 161, a second handle portion 162, and a third handle portion 163. The first handle portion 161 is located in the notch 113 and extends to the direction opposite to the first edge 114 and beyond the second edge 115. The first handle 161 is connected to the polyphenylene terephthalamide fiber 11; the second handle portion 162 and the third handle portion 163 are connected to the second edge 115 and are respectively connected to both sides of the first handle portion 161. Referring to fig. 6 and 7, the first handle portion 161 includes an upper surface 164 and a lower surface 165 opposite to the upper surface 164. The upper surface 164 is coplanar with the first surface 111. The upper surface 164 includes a first non-adhesive area 1641, a first adhesive area 1642, a second non-adhesive area 1643, a second adhesive area 1644, and a third non-adhesive area 1645 sequentially arranged from the first edge 114 to the second edge 115.

In one embodiment, referring to fig. 6, the notch 113 is U-shaped. The polyphenylene terephthalamide fiber 11 forms a bottom edge 116 and two oppositely disposed side edges 117 at the notch 113. The bottom edge 116 connects the two side edges 117 to form the U-shaped notch 113 together. The first handle portion 161 is connected to the two side edges 117, the second handle portion 162 and the third handle portion 163 by a tear line 118. The bottom edge 116 is not connected to the first handle portion 161. That is, a gap 119 is formed between the bottom edge 116 and the first handle portion 161 to facilitate separation of the handle membrane 16. In other embodiments, the bottom edge 116 may be connected to the handle membrane 16 by a tear line 118.

The shape of the notch 113 can be adjusted adaptively according to actual needs, and can be in a V shape.

Further, referring to fig. 10, the second surface 112 may include a fourth non-glue region 1121, a third strong-glue region 1122, a fifth non-glue region 1123, a fourth strong-glue region 1124 and a sixth non-glue region 1125 sequentially arranged from the first edge 114 to the second edge 115.

In another embodiment, referring to fig. 12 and 13, the first surface 111 includes a third weak glue region 1118, a first strong glue region 1112, a second non-glue region 1113, a first weak glue region 1114, a third non-glue region 1115, a second weak glue region 1116 and a second strong glue region 1117 sequentially arranged from the first edge 114 to the second edge 115. The second surface 112 includes a first printing region 1126, a fourth non-glue region 1121, a third strong-glue region 1122, a fifth non-glue region 1123, a fourth strong-glue region 1124, a sixth non-glue region 1125, and a second printing region 1127 sequentially arranged from the first edge 114 to the second edge 115.

Further, referring to fig. 15, the packaging film 10 may further include a second adhesive layer 17 and a second printing layer 19. The second glue layer 17 is connected between the second printed layer 19 and the first printed layer 13.

The shapes, the arrangement positions and the bonding force of the strong glue area and the weak glue area can be adaptively adjusted according to the specific conditions of the battery. The first printed layer 13, the second printed layer 19, and the third printed layer 14 may be patterns such as a trademark, a model, a nominal voltage, a rated capacity, a warning sign, a two-dimensional code, or ink layers of various colors.

The battery 100 and the packaging film 10 of the present application will be specifically described below with reference to specific embodiments.

Example 1

Referring to fig. 5, the packaging film 10 includes a poly phenylene terephthalamide fiber 11, a first adhesive layer 12, a first printing layer 13, a third printing layer 14, and a first release layer 15.

Referring to fig. 3 and 4, in the length direction (i.e., the X-axis direction) of the packaging film 10, the polyphenylene terephthalamide fiber 11 includes a first edge 114 and a second edge 115 opposite to the first edge 114.

Referring to fig. 3 and 4, the polyphenylene terephthalamide fiber 11 includes a first surface 111 and a second surface 112 opposite to the first surface 111. The first surface 111 includes a first non-adhesive region 1111, a first strong adhesive region 1112, a second non-adhesive region 1113, a first weak adhesive region 1114, a third non-adhesive region 1115, a second weak adhesive region 1116 and a second strong adhesive region 1117 sequentially arranged from the first edge 114 to the second edge 115. The projections of the first non-glue region 1111, the first strong-glue region 1112, the second non-glue region 1113, the first weak-glue region 1114, the third non-glue region 1115, the second weak-glue region 1116 and the second strong-glue region 1117 in the width direction (i.e., the Y-axis direction) of the packaging film 10 do not overlap.

The poly phenylene terephthalamide fiber 11 is provided with a notch 113. The notch 113 extends through a portion of the first area of weak glue 1114, the third area of no glue 1115, and the second area of weak glue 1116. The notch 113 is substantially rounded rectangular. The first surface 111 between the notch 113 and the second edge 115 is a glue-free area.

The first glue layer 12 is disposed in the first surface 111 and includes a first glue area 1112, a first glue area 1114, a second glue area 1116 and a second glue area 1117. The first strong glue area 1112 forms a mesh-shaped first glue layer 12, the second strong glue area 1117 forms a strip-shaped first glue layer 12, and the first weak glue area 1114 and the second weak glue area 1116 form a dot-shaped first glue layer 12. The bonding force of the first strong glue area 1112 and the second strong glue area 1117 is greater than the bonding force of the first weak glue area 1114 and the second weak glue area 1116, the bonding force of the first strong glue area 1112 is greater than the bonding force of the second strong glue area 1117, and the bonding force of the first weak glue area 1114 is greater than the bonding force of the second weak glue area 1116.

Referring to fig. 5, the first printing layer 13 is disposed on the second surface 112. The third printing layer 14 is disposed between the first release layer 15 and the first adhesive layer 12.

Referring to fig. 1, a battery 100 provided in embodiment 1 includes a battery body 20 and the packaging film 10. The packaging film 10 covers the outer surface of the battery body 20. With reference to fig. 1 and 2, the battery body 20 includes a front surface 201 and a back surface 202 opposite to the front surface 201.

Referring to fig. 1 to 5, the steps of wrapping the battery body 20 with the wrapping film 10 will be briefly described as follows:

firstly, tearing the first release layer 15 on the packaging film 10; next, the back surface 202 of the battery body 20 is placed on the packaging film 10 corresponding to the first weak adhesive regions 1114. Finally, the two sides of the poly (phenylene terephthalamide) fiber 11 are folded toward the front surface 201 of the battery body 20 along the first non-adhesive region 1111 and the second non-adhesive region 1113, respectively, and are attached to the front surface 201. The packaged battery 100 is shown in fig. 1 and 2.

In example 1, when the battery body 20 needs to be detached, the packaging film 10 is torn from the notch 113, so that the battery body 20 can be separated from the packaging film 10.

Example 2

Example 2 differs from example 1 in the structure of the packaging film 10.

In example 2, referring to fig. 6, the polyphenylene terephthalamide fiber 11 further includes a handle membrane 16. The notch 113 is formed by the second edge 115 being recessed toward the first edge 114. The handle membrane 16 is located in the notch 113 and is formed by extending the poly (phenylene terephthalamide) fiber 11. Specifically, the handle diaphragm 16 includes a first handle portion 161, a second handle portion 162, and a third handle portion 163. The first handle portion 161 is located in the notch 113 and extends to the direction opposite to the first edge 114 and beyond the second edge 115. The first handle portion 161 is connected to the polyphenylene terephthalamide fiber 11. The second handle portion 162 and the third handle portion 163 are connected to the second edge 115 and are respectively connected to both sides of the first handle portion 161. In example 2, the grip film 16 and the polyphenylene terephthalamide fiber 11 were integrally molded.

In example 2, the notch 113 is U-shaped. The polyphenylene terephthalamide fiber 11 forms a bottom edge 116 and two oppositely disposed side edges 117 at the notch 113. The bottom edge 116 connects the two side edges 117 to form the U-shaped notch 113 together. The first handle portion 161 is connected to the two side edges 117, the second handle portion 162 and the third handle portion 163 by a tear line 118. The bottom edge 116 is not connected to the first handle portion 161. I.e. a gap 119 is formed between the bottom edge 116 and the first handle portion 161.

Referring to fig. 6 and 7, the first handle portion 161 includes an upper surface 164 and a lower surface 165 opposite to the upper surface 164. The upper surface 164 is coplanar with the first surface 111. The upper surface 164 includes a first non-adhesive area 1641, a first adhesive area 1642, a second non-adhesive area 1643, a second adhesive area 1644, and a third non-adhesive area 1645 sequentially arranged from the first edge 114 to the second edge 115. Wherein, the projections of the first glue area 1642 and the first weak glue area 1114 in the width direction of the packaging film 10 are overlapped, and the projections of the second glue area 1644 and the second strong glue area 1117 in the width direction of the packaging film 10 are overlapped. The adhesion force of the first glue area 1642 may be equal to that of the first weak glue area 1114, and the adhesion force of the second glue area 1644 may be equal to that of the second strong glue area 1117.

Referring to fig. 6 to 9, the steps of wrapping the battery body 20 with the wrapping film 10 will be briefly described. Fig. 8 is a schematic front view of the battery 100, and fig. 9 is a schematic back view of the battery 100. In order to better show the positions of the packaging film 10 and the battery body 20, the packaging film 10 in fig. 8 and 9 is set in a transparent state.

Firstly, tearing the first release layer 15 on the packaging film 10; next, the back surface 202 of the battery body 20 is placed on the packaging film 10 corresponding to the first weak adhesive regions 1114. Finally, the two sides of the poly (phenylene terephthalamide) fiber 11 are folded toward the front surface 201 of the battery body 20 along the first non-adhesive region 1111 and the second non-adhesive region 1113, respectively, and are attached to the front surface 201. At this time, the second handle portion 162, the third handle portion 163, and the first handle portion 161 beyond the first edge 114 are located on the front surface 201 of the battery body 20. The first adhesive area 1642 is located on the back side 202 of the battery 100, and the second adhesive area 1644 is located on the front side 201 of the battery 100. The packaged battery 100 is shown in fig. 8 and 9.

In embodiment 2, when the battery body 20 needs to be removed, the second handle portion 162, the third handle portion 163, and the first handle portion 161 are pulled up in order to tear off the packaging film 10. Since the second handle portion 162 and the third handle portion 163 are connected to the packaging film 10, the easy-to-tear line 118 is broken along with the packaging film 10 when the second handle portion 162 and the third handle portion 163 are pulled up, so that the packaging film 10 is separated from the battery body 20. In addition, since the gap 119 is formed between the bottom edge 116 and the first handle portion 161, the separation of the handle membrane 16 is facilitated.

Example 3

Example 3 differs from example 2 in the structure of the packaging film 10.

In example 3, referring to fig. 11, the packaging film 10 further includes a second glue layer 17 and a second release layer 18.

Specifically, referring to fig. 10, the second surface 112 includes a fourth non-glue region 1121, a third strong-glue region 1122, a fifth non-glue region 1123, a fourth strong-glue region 1124 and a sixth non-glue region 1125 sequentially arranged from the first edge 114 to the second edge 115. The projections of the fourth non-glue region 1121, the third strong-glue region 1122, the fifth non-glue region 1123, the fourth strong-glue region 1124 and the sixth non-glue region 1125 in the width direction of the packaging film 10 do not overlap. The third and fourth regions 1122, 1124 of strong glue are located on the second surface 112 corresponding to the first regions 1114 of weak glue.

The second adhesive layer 17 is disposed on the surface of the first printing layer 13 corresponding to the third and fourth strong adhesive regions 1122 and 1124. The bonding strength of the third strong glue region 1122 is greater than the bonding strength of the first weak glue region 1114 and the second weak glue region 1116; the adhesive strength of the fourth strong glue area 1124 is greater than the adhesive strength of the first weak glue area 1114 and the second weak glue area 1116. The adhesive strength of the third strong glue region 1122 may be greater than or less than the adhesive strength of the fourth strong glue region 1124.

The second release layer 18 is disposed on the second adhesive layer 17 for protecting the packaging film 10.

In example 3, when the packaging film 10 covers the battery body 20, the third and fourth regions 1122 and 1124 of strong glue are located on the outer surface of the battery body 20. Thus, when the battery 100 is accommodated in a battery compartment of an electronic device (e.g., a mobile phone, a tablet computer, a watch, etc.), the battery 100 and the battery compartment can be stably connected. The second adhesive layer 17 is integrated on the poly phenylene terephthamide fiber 11, so that the connection between the battery 100 and the battery compartment is facilitated, the disassembly of the battery 100 is facilitated, and the cost and the labor are saved.

Example 4

Referring to fig. 12 to 15, embodiment 4 is different from embodiment 3 in that the structure of the first surface 111, the structure of the second surface 112, and the packaging film 10 further include a second printed layer 19.

In embodiment 4, referring to fig. 12, the first surface 111 includes a third weak glue region 1118, a first strong glue region 1112, a second non-glue region 1113, a first weak glue region 1114, a third non-glue region 1115, a second weak glue region 1116, and a second strong glue region 1117 sequentially arranged from the first edge 114 to the second edge 115. The bonding strength of the third weak glue region 1118 is smaller than the bonding strength of the first strong glue region 1112 and the second strong glue region 1117.

Referring to fig. 13, the second surface 112 includes a first printing region 1126, a fourth non-glue region 1121, a third strong-glue region 1122, a fifth non-glue region 1123, a fourth strong-glue region 1124, a sixth non-glue region 1125, and a second printing region 1127 sequentially arranged from the first edge 114 to the second edge 115. The first printed region 1126 is located on the second surface 112 corresponding to the third area of weak glue 1118.

The second printed layer 19 is disposed in the first printed region 1126 and the second printed region 1127, and the second printed layer 19 is located between the second release layer 18 and the second glue layer 17. The second printing layer 19 may be patterns such as a trademark, a model, a nominal voltage, a rated capacity, a warning sign, a two-dimensional code, or ink layers of various colors.

In this embodiment, referring to fig. 13, the surface of the handle film 16 extending from the second printed region 1127 toward the second edge 115 may also be used as a printed region for disposing the second printed layer 19.

Referring to fig. 12 to 15, the steps of wrapping the battery body 20 with the wrapping film 10 will be briefly described. Fig. 14 is a schematic front view of the battery 100. In order to better show the positions of the packaging film 10 and the battery body 20, the packaging film 10 in fig. 14 is set in a transparent state.

Firstly, tearing the first release layer 15 on the packaging film 10; next, the back surface of the battery body 20 is placed on the packaging film 10 corresponding to the first weak adhesive regions 1114. Finally, the two sides of the poly (phenylene terephthalamide) fiber 11 are folded toward the front surface 201 of the battery body 20 along the second non-glue region 1113 and the third non-glue region 1115, respectively, and are adhered to the front surface 201. At this time, the second handle portion 162, the third handle portion 163 and the first handle portion 161 beyond the first edge 114 are located on the front surface 201 of the battery body 20 and overlap with a portion of the polyphthalamide fiber 11 corresponding to the third weak adhesive region 1118. The first handle part 161, the second handle part 162 and the third handle part 163 are located above the third weak glue region 1118, so that the subsequent packaging film 10 and the battery body 20 can be separated conveniently.

Although the present application has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present application.