Packaging film structure and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a packaging film structure and a battery, the packaging film structure comprises a film main body, a first bonding part, a second bonding part and a bonding layer, the film main body is provided with a first surface and a second surface which are positive and negative, the first surface is provided with a first glue structure, and the second surface is provided with a second glue structure; the film body is sequentially divided into a first area, a second area and a third area in the first direction. The first bonding part is connected with the film main body and is arranged at one ends of the first area and the third area; the second bonding part is connected with the film main body and is arranged at one end of the second area, a gap is formed between the second bonding part and the first bonding part, and second glue structures are arranged on the surfaces, coplanar with the first surface, of the second bonding part and the first bonding part; the bonding layer is fixed on the second surface. According to the utility model, the gummed paper adhered to the tail part of the battery body, the film main body adhered to the back surface of the battery and the adhesive layer adhered to the film main body are integrated, so that the manufacturing procedures are reduced, the production efficiency is improved, and the development preparation period of 3C consumer battery products is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a packaging film structure and a battery. Background Art

[0002] In battery packaging, the battery is wrapped with a packaging film. At present, the packaging film includes three different types of adhesive tapes: one is used to stick the battery tail, one is used to stick the protective film on the back of the battery, and one is a double-sided tape stuck on the protective film. The three types of adhesive tapes need to be produced in different operating positions. Not only are there many materials used, but there are also many process steps, which leads to low production efficiency of the packaging film and prolongs the development preparation cycle of 3C consumer battery products. Utility Model Content

[0003] The utility model aims to provide a packaging film structure and a battery, so as to integrate the packaging film, reduce the manufacturing process and improve the production efficiency.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The packaging film structure of the utility model, taking the set first direction and the second direction as reference directions, comprises:

[0006] The film body has a first surface and a second surface on both sides, and a first adhesive structure is provided on the first surface; the film body is divided into a first area, a second area and a third area in sequence along the first direction;

[0007] a first adhesive portion connected to the film body and provided at one end of the first region along the second direction and one end of the third region along the second direction;

[0008] A second adhesive portion connected to the film body and disposed at one end of the second region along the second direction, with a gap between the second adhesive portion and the first adhesive portion, and a second adhesive structure is disposed on the surface coplanar with the second adhesive portion, the first adhesive portion and the first surface;

[0009] The adhesive layer is fixed to the second surface.

[0010] Preferably, the first glue structure includes a point-shaped glue structure and a first planar glue structure, the point-shaped glue structure is arranged on a side of the first region away from the second region along the first direction, a side of the third region close to the second region along the first direction, and on the second region; the first planar glue structure is arranged on a side of the first region away from the second region along the first direction and a side of the third region away from the second region along the first direction; the second glue structure includes a second planar glue structure.

[0011] Preferably, the adhesive layer is located on the second surface opposite to the second area.

[0012] Preferably, the first adhesive portion, the second adhesive portion and the membrane body are integrally formed.

[0013] Preferably, the first region has a first sub-region and a second sub-region arranged in sequence along the first direction, the third region has a third sub-region and a fourth sub-region arranged in sequence along the first direction, and the first adhesive portion is connected to the film body corresponding to the second sub-region or the third sub-region.

[0014] Preferably, the first sub-region has a protrusion, and the protrusion is protruding in the opposite direction of the first direction.

[0015] Preferably, the adhesive layer includes a first adhesive layer and a protective film layer, the first adhesive layer has a first adhesive surface and a second adhesive surface disposed opposite to each other, the first adhesive surface is fixed on the second surface, and the protective film layer is fixed on the second adhesive surface.

[0016] Preferably, the protective film layer is provided with a lifting portion, and the lifting portion extends along the second direction in a direction away from the protective film layer.

[0017] Preferably, the membrane body comprises a first heat-conducting layer, a substrate layer, a second adhesive layer and a second heat-conducting layer stacked in sequence, the first surface is a side of the second heat-conducting layer facing away from the second adhesive layer, and the second surface is a side of the first heat-conducting layer facing away from the substrate layer.

[0018] Preferably, the packaging film structure also includes a tearing portion, a first end of the tearing portion is fixed on the second surface and opposite to the second area, and the adhesive layer is provided with an avoidance notch exposing the first end, and a second end of the tearing portion is movably arranged on the second surface and opposite to the first area.

[0019] The utility model also provides a battery, comprising a battery body and the packaging film structure as described above, wherein the packaging film structure wraps the outer surface of the battery body.

[0020] Compared with the prior art, the packaging film structure and the battery of the utility model embodiment have the following beneficial effects:

[0021] The packaging film structure of the embodiment of the utility model is integrated with the first adhesive part and the second adhesive part on the film body, with a gap between the first adhesive part and the second adhesive part, and the first adhesive part and the second adhesive part are both provided with a second adhesive structure, so that the first adhesive part and the second adhesive part can be respectively adhered to the tail of the battery body to encapsulate the tail of the battery body; the first adhesive structure is provided on the first surface of the film body, the second area can be adhered to the back of the battery body through the first adhesive structure, and the first area and the third area can be adhered to the side and front of the battery body through the first adhesive structure. The adhesive layer is fixed to the second surface of the film body, which effectively protects the battery body and facilitates the fixing of the battery body on the terminal product. The utility model integrates the adhesive tape for bonding the tail of the battery body, the film body attached to the back of the battery, and the adhesive layer attached to the film body, which reduces the production process, improves production efficiency, and shortens the development preparation cycle of 3C consumer battery products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a plan view of the packaging film structure described in the embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the membrane body in the embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the bonding points of the membrane body in the embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the packaging film structure in the embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of a battery body before pasting the packaging film structure according to an embodiment of the utility model;

[0027] Figure 6 It is a schematic diagram of the first bonding portion of the packaging film structure according to the embodiment of the utility model being fixed to the tail of the battery body;

[0028] Figure 7 It is a schematic diagram of the first sub-region and the fourth sub-region of the packaging film structure according to the embodiment of the utility model being adhered to the front side of the battery body;

[0029] Figure 8 It is a schematic diagram of the second bonding portion of the packaging film structure according to the embodiment of the utility model being fixed to the tail of the battery body;

[0030] Fig. 9 This is a front view of the battery body after the packaging film structure is attached to the battery body of the utility model embodiment;

[0031] Fig.10 It is a schematic diagram of the back side of the battery body after the packaging film structure is pasted on the battery body of the embodiment of the utility model.

[0032] Numbers in the figure:

[0033] 10. Film body; 101. First region; 1011. First sub-region; 10111. Third chamfered edge; 1012. Second sub-region; 102. Second region; 103. Third region; 1031. Third sub-region; 1032. Fourth sub-region; 10321. Fourth chamfered edge; 104. Protrusion; 105. First adhesive structure; 1051. Dot-shaped adhesive structure; 1052. First planar adhesive structure; 106. Second adhesive structure; 11. First thermal conductive layer; 111. Second surface; 12. Base material layer; 13. Second adhesive layer; 14. Second thermal conductive layer; 141. First surface;

[0034] 20, first bonding portion; 21, second bonding portion; 211, first chamfered edge; 212, second chamfered edge;

[0035] 30, adhesive layer; 301, avoidance gap; 31, first adhesive layer; 311, first adhesive surface; 312, second adhesive surface; 32, protective film layer; 321, lifting part;

[0036] 40, tearing portion; 401, first end; 402, second end;

[0037] 50. Battery body;

[0038] A. First direction; B. Second direction. DETAILED DESCRIPTION

[0039] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0042] See also Figure 1 and Figure 2An embodiment of the utility model provides a packaging film structure, with a set first direction A and a second direction B as reference directions, and the first direction A and the second direction B are intersecting. The packaging film structure includes a film body 10, a first adhesive portion 20, a second adhesive portion 21 and an adhesive layer 30. The film body 10 has a first surface 141 and a second surface 111 on both sides. A first adhesive structure 105 is provided on the first surface 141. The film body 10 is divided into a first area 101, a second area 102 and a third area 103 along a first direction A; the first adhesive portion 20 is connected to the film body 10 and is provided at one end of the first area 101 along the second direction B and one end of the third area 103 along the second direction B; the second adhesive portion 21 is connected to the film body 10 and is provided at one end of the second area 102 along the second direction B. There is a gap between the second adhesive portion 21 and the first adhesive portion 20, and a second adhesive structure 106 is provided on the surface coplanar with the second adhesive portion 21, the first adhesive portion 20 and the first surface 141; the adhesive layer 30 is fixed to the second surface 111.

[0043] The first adhesive portion 20 and the second adhesive portion 21 can be respectively adhered to the tail of the battery body 50 through the second adhesive structure 106 to encapsulate the tail of the battery body 50; the first adhesive structure 105 is provided on the first surface 141 of the membrane body 10, the second area 102 is adhered to the back of the battery body 50 through the first adhesive structure 105, the first area 101 and the third area 103 are adhered to the side and front of the battery body 50 through the first adhesive structure 105, and the adhesive layer 30 is fixed on the second surface 111 of the membrane body 10, which effectively protects the battery body 50 and facilitates the fixing of the battery body 50 in the battery compartment of the terminal product. By integrating the adhesive tape adhered to the tail of the battery body 50, the membrane body 10 pasted on the back of the battery body 50, and the adhesive layer 30 pasted on the membrane body 10, the production process is reduced, the production efficiency is improved, the development preparation cycle of 3C consumer battery products is shortened, and labor costs are effectively saved.

[0044] When the film packaging structure is pasted on the battery body 50, since the adhesive layer 30, the first adhesive portion 20 and the second adhesive portion 21 are all fixed to the film body 10, after the film body 10 is pasted on the battery body 50, the positions of the first adhesive portion 20, the second adhesive portion 21 and the adhesive layer 30 are fixed accordingly, which can reduce the number of positioning times of the adhesive tape and quickly complete the packaging of the battery body 50. In addition, since the film packaging structure can be wrapped on the outer surface of the battery body 50 after positioning once, compared with pasting and fixing three different adhesive tapes separately, the installation tolerance of the adhesive tape edge can be reduced, thereby increasing the effective pasting area.

[0045] The first direction A intersects with the second direction B. In some embodiments, the first direction A is substantially perpendicular to the second direction B, wherein an angle between the first direction A and the second direction B between 89° and 91° can be considered substantially perpendicular.

[0046] In some embodiments, the first adhesive portion 20 , the second adhesive portion 21 and the membrane body 10 are integrally formed, which is convenient for manufacturing and reduces the positioning and installation tolerance between the first adhesive portion 20 , the second adhesive portion 21 and the membrane body 10 .

[0047] See also Figure 2 In some embodiments, the first region 101 has a first sub-region 1011 and a second sub-region 1012 sequentially arranged along the first direction A, the third region 103 has a third sub-region 1031 and a fourth sub-region 1032 sequentially arranged along the first direction A, and the first adhesive portion 20 is connected to the film body 10 corresponding to the second sub-region 1012 or the third sub-region 1031. The film body 10 of the first sub-region 1011 and the film body 10 of the fourth sub-region 1032 are respectively used to be attached to the front of the battery body 50, and the film body 10 of the second sub-region 1012 and the film body 10 of the third sub-region 1031 are respectively used to be attached to the side of the battery body 50. In the second direction B, the boundary of the first adhesive portion 20 is flush with the boundary of the second sub-region 1012 or the third sub-region 1031, so that when the film body 10 of the second sub-region 1012 or the third sub-region 1031 is adhered to the side of the battery body 50, the first adhesive portion 20 can be bent and adhered to the tail of the battery body 50, which is convenient for wrapping the tail of the battery body 50.

[0048] In some embodiments, the second adhesive portion 21 is provided with a first chamfered edge 211 and a second chamfered edge 212, the film body 10 of the first sub-region 1011 is provided with a third chamfered edge 10111, and the film body 10 of the fourth sub-region 1032 is provided with a fourth chamfered edge 10321, the inclination angle of the first chamfered edge 211 is greater than the inclination angle of the third chamfered edge 10111, and the inclination angle of the second chamfered edge 212 is greater than the inclination angle of the fourth chamfered edge 10321. When the packaging film structure is wrapped on the battery body 50, the second adhesive portion 21 wraps the tail of the battery body 50 and then is bent and pasted on the front of the battery body 50. The second adhesive portion 21 can be partially pasted on the film body 10 of the first sub-region 1011 and the fourth sub-region 1032, and the tail of the battery body 50 is completely packaged and protected.

[0049] See also Figure 2In some embodiments, the film body 10 of the first sub-region 1011 has a protrusion 104, and the protrusion 104 is arranged along the reverse protrusion of the first direction A. In some embodiments, the packaging film structure further includes a tearing portion 40, the first end 401 of the tearing portion 40 is fixed on the second surface 111 and opposite to the second region 102, and the adhesive layer 30 is provided with an avoidance notch 301 exposing the first end 401, and the second end 402 of the tearing portion 40 is movably arranged on the second surface 111 and opposite to the first region 101. The second end 402 of the tearing portion 40 can be lifted from the second surface 111 to form a hand-held handle, which is convenient for pulling the battery body 50. There is no adhesive layer between the tearing portion 40 and the second surface 111 of the film body 10, so that the tearing portion 40 can be easily opened. In some embodiments, the tear portion 40 and the membrane body 10 can be integrally formed. For example, a notch matching the tear portion 40 is reserved on the membrane body 10, and the tear portion 40 is embedded in the notch. The tear portion 40 is connected to the edge of the notch by an easy-tear line.

[0050] In some embodiments, the adhesive layer 30 is located on the second surface 111 opposite to the second region 102 , so that when the film body 10 is wrapped around the battery body 10 , the adhesive layer 30 will not bend with the film body 10 , making it convenient to bond and fix the battery body 50 through the adhesive layer 30 .

[0051] See also Figure 4 The adhesive layer 30 includes a first adhesive layer 31 and a protective film layer 32. The first adhesive layer 31 has a first adhesive surface 311 and a second adhesive surface 312 that are arranged opposite to each other. The first adhesive surface 311 is fixed on the second surface 111, and the protective film layer 32 is fixed on the second adhesive surface 312. The first adhesive layer 31 is bonded and fixed to the film body 10, and the protective film layer 32 is a blue film. The first adhesive surface 311 and the second adhesive surface 312 of the first adhesive layer 31 are both coated with adhesive. The adhesive on the first adhesive surface 311 bonds the adhesive layer 30 as a whole to the second surface 111 of the film body 10, and the adhesive on the second adhesive surface 312 bonds the protective film layer 32 to the second adhesive surface 312. After the protective film layer 32 is uncovered, the battery body 50 can be bonded to a desired position, for example, in the battery compartment of a terminal product, through the adhesive on the second adhesive surface 312 of the first adhesive layer 31.

[0052] See also Figure 1 In some embodiments, the protective film layer 32 has a lifting portion 321, and the lifting portion 321 extends in a direction away from the protective film layer 32 along the second direction B. The lifting portion 321 at least partially extends to the outside of the first adhesive layer 31, and the lifting portion 321 does not cover or partially covers the first adhesive layer 31, and the protective film layer 32 is easily uncovered through the lifting portion 321.

[0053] See also Figure 3In some embodiments, along the thickness direction of the film body 10, the film body 10 includes a first heat-conducting layer 11, a substrate layer 12, a second adhesive layer 13, and a second heat-conducting layer 14 stacked in sequence, the first surface 141 is a side of the second heat-conducting layer 14 away from the second adhesive layer 13, and the second surface 111 is a side of the first heat-conducting layer 11 away from the substrate layer 12. The substrate layer 12 is made of PET substrate. The first heat-conducting layer 11 is made of heat-conducting material, the second adhesive layer 13 is made of acrylic glue, and the second heat-conducting layer 14 is made of heat-conducting ink.

[0054] See also Figure 3 In some embodiments, the first adhesive structure 105 includes a dot-shaped adhesive structure 1051 and a first planar adhesive structure 1052. The dot-shaped adhesive structure 1051 is disposed on a side of the first region 101 away from the second region 102 along the first direction A, a side of the third region 103 close to the second region 102 along the first direction A, and the second region 102; the first planar adhesive structure 1052 is disposed on a side of the first region 101 away from the second region 102 along the first direction A, and a side of the third region 103 away from the second region 102 along the first direction A; the second adhesive structure 106 includes a second planar adhesive structure. The dot-shaped adhesive structure 1051 is a weak adhesive structure, and the first planar adhesive structure 1052 and the second planar adhesive structure are both strong adhesive structures, which enhance the adhesive fixation between the packaging film structure and the battery body 50. Specifically, a point-shaped glue structure 1051 is set on the raised portion of the first sub-region 1011, and a first planar glue structure 1052 is set on the portion outside the raised portion in the first sub-region 1011; the second sub-region 1012, the second region 102 and the third sub-region 1031 are all set with a point-shaped glue structure 1051, and the fourth sub-region 1032 is set with a first planar glue structure 1052; the first adhesive portion 20 and the second adhesive portion 21 are both set with a second planar glue structure.

[0055] In some embodiments, a first planar adhesive structure 1052 is disposed at a portion where the tear portion 40 overlaps with the second region 102 , so as to bond and fix the second end 402 of the tear portion 40 to the film body 10 .

[0056] The utility model also provides a battery, comprising a battery body 50 and the packaging film structure as described above, wherein the packaging film structure wraps the outer surface of the battery body 50. The use of the packaging film structure can realize rapid packaging of the battery body 50, thereby improving production efficiency.

[0057] The packaging process of the packaging film structure of the utility model for the battery body 50 is as follows:

[0058] See also Figure 5-Figure 10First, the film body 10 is pasted as a whole on the back side of the battery body 50, and then the second sub-region 1012 and the third sub-region 1031 of the film body 10 are bent and pasted to the side of the battery body 50 respectively, and the first adhesive portion 20 is bent and pasted to the tail of the battery body 50; then, the first sub-region 1011 and the fourth sub-region 1032 are bent and pasted on the front side of the battery body 50, and the second adhesive portion 21 is bent along the tail of the battery body 50 and pasted on the front side of the battery body 50.

[0059] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A packaging film structure, with a first direction (A) and a second direction (B) set as reference directions, characterized in that: include: A membrane body (10) having a first surface (141) and a second surface (111) on both sides, wherein a first adhesive structure (105) is provided on the first surface (141); the membrane body (10) is divided into a first area (101), a second area (102) and a third area (103) in sequence along the first direction (A); A first adhesive portion (20) connected to the film body (10) and provided at one end of the first region (101) along the second direction (B) and at one end of the third region (103) along the second direction (B); a second adhesive portion (21), connected to the film body (10), and arranged at one end of the second region (102) along the second direction (B), a gap being provided between the second adhesive portion (21) and the first adhesive portion (20), and a second adhesive structure (106) being provided on the surface coplanar with the second adhesive portion (21), the first adhesive portion (20) and the first surface (141); The adhesive layer (30) is fixed to the second surface (111).

2. The packaging film structure according to claim 1, characterized in that: The first glue structure (105) includes a point-shaped glue structure (1051) and a first planar glue structure (1052), wherein the point-shaped glue structure (1051) is arranged on a side of the first area (101) away from the second area (102) along the first direction (A), a side of the third area (103) close to the second area (102) along the first direction (A), and on the second area (102); the first planar glue structure (1052) is arranged on a side of the first area (101) away from the second area (102) along the first direction (A) and a side of the third area (103) away from the second area (102) along the first direction (A); the second glue structure (106) includes a second planar glue structure.

3. The packaging film structure according to claim 1, characterized in that: The adhesive layer (30) is located on the second surface (111) opposite to the second area (102).

4. The packaging film structure according to claim 1, characterized in that: The first adhesive portion (20), the second adhesive portion (21) and the membrane body (10) are integrally formed.

5. The packaging film structure according to claim 1, characterized in that: The first region (101) has a first sub-region (1011) and a second sub-region (1012) arranged in sequence along the first direction (A), the third region (103) has a third sub-region (1031) and a fourth sub-region (1032) arranged in sequence along the first direction (A), and the first adhesive portion (20) is connected to the film body (10) corresponding to the second sub-region (1012) or the third sub-region (1031).

6. The packaging film structure according to claim 5, characterized in that: The first sub-region (1011) has a protruding portion (104), and the protruding portion (104) protrudes in the opposite direction of the first direction (A).

7. The packaging film structure according to claim 1, characterized in that: The adhesive layer (30) comprises a first adhesive layer (31) and a protective film layer (32); the first adhesive layer (31) comprises a first adhesive surface (311) and a second adhesive surface (312) disposed opposite to each other; the first adhesive surface (311) is fixed on the second surface (111); and the protective film layer (32) is fixed on the second adhesive surface (312).

8. The packaging film structure according to claim 7, characterized in that: The protective film layer (32) is provided with a lifting portion (321), and the lifting portion (321) extends along the second direction (B) in a direction away from the protective film layer (32).

9. The packaging film structure according to claim 1, characterized in that: The membrane body (10) comprises a first heat-conducting layer (11), a substrate layer (12), a second adhesive layer (13) and a second heat-conducting layer (14) which are stacked in sequence; the first surface (141) is a side of the second heat-conducting layer (14) which is away from the second adhesive layer (13); and the second surface (111) is a side of the first heat-conducting layer (11) which is away from the substrate layer (12).

10. The packaging film structure according to claim 1, characterized in that: The packaging film structure also includes a tearing portion (40), a first end (401) of the tearing portion (40) is fixed on the second surface (111) and opposite to the second area (102), and the adhesive layer (30) is provided with an avoidance notch (301) exposing the first end (401), and a second end (402) of the tearing portion (40) is movably arranged on the second surface (111) and opposite to the first area (101).

11. A battery, characterized in that: It comprises a battery body (50) and a packaging film structure as claimed in any one of claims 1 to 10, wherein the packaging film structure wraps the outer surface of the battery body (50).

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