Cell gummed paper and battery

Abstract

The utility model relates to the technical field of battery packaging, and discloses a battery core adhesive tape and a battery, the battery core adhesive tape comprises a first release paper, a first adhesive tape, a bonding layer, a second adhesive tape and a second release paper, the first adhesive tape is provided with a first surface and a second surface which are arranged back to back, and the first surface is bonded on the first release paper; convex parts are arranged on the first gummed paper at intervals in the first direction, and an avoiding groove is formed between every two adjacent convex parts; the bonding layer is provided with a first bonding surface and a second bonding surface which are arranged oppositely, and the first bonding surface is bonded on the second surface; the second gummed paper is provided with a third surface and a fourth surface which are arranged oppositely, and the third surface is partially bonded on the second bonding surface; and the second release paper is adhered to the fourth surface. According to the utility model, after the first gummed paper is positioned and bonded on the head of the battery, the positions of the bonding layer and the second gummed paper are fixed, and only the first gummed paper needs to be positioned in the whole process, so that the gummed paper positioning procedure is reduced, and the positioning and mounting error is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packaging, in particular to a battery core adhesive tape and a battery. Background Art

[0002] The battery cell adhesive tape is attached to the head of the battery cell, which can not only prevent the aluminum from being exposed at the head of the battery cell, but also wrap the battery protection board in the battery to protect the battery protection board. At present, the battery cell adhesive tape generally includes two separate parts: the top sealing tape and the head adhesive tape of the composite double-sided tape. When using it, the top sealing tape is attached first, and then the head adhesive tape of the composite double-sided tape is attached. Each attachment requires positioning of the adhesive tape, resulting in multiple adhesive tape positioning processes and increased positioning and installation errors. Utility Model Content

[0003] The utility model aims to provide a battery core adhesive tape and a battery, which can reduce the adhesive tape positioning process and reduce the positioning error.

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

[0005] One aspect of the utility model is to provide a battery core adhesive tape, comprising:

[0006] First release paper;

[0007] The first adhesive tape has a first surface and a second surface that are arranged opposite to each other, the first surface has adhesive, and the first surface is bonded to the first release paper; the first adhesive tape is provided with raised portions at intervals along a first direction, and avoidance grooves are formed between adjacent raised portions;

[0008] An adhesive layer having a first adhesive surface and a second adhesive surface disposed opposite to each other, wherein the first adhesive surface is bonded to the second surface;

[0009] A second adhesive tape having a third surface and a fourth surface disposed opposite to each other, wherein the third surface is partially bonded to the second adhesive surface, and the fourth surface has adhesive;

[0010] The second release paper is bonded to the fourth surface.

[0011] Preferably, the second adhesive tape includes a first adhesive tape body, a heat conductive sheet and a second adhesive tape body, and the heat conductive sheet is arranged between the first adhesive tape body and the second adhesive tape body; the side of the first adhesive tape body facing away from the second adhesive tape body forms the third side, and the side of the second adhesive tape body facing away from the first adhesive tape body forms the fourth side.

[0012] Preferably, taking the set second direction as a reference direction, the first adhesive surface and the second adhesive surface both have a first edge and a second edge arranged opposite to each other along the second direction, one side edge of the first adhesive tape in the second direction is aligned with the first edge of the first adhesive surface, and one side edge of the second adhesive tape in the second direction is aligned with the second edge of the second adhesive surface.

[0013] Preferably, two ends of the first adhesive tape in the first direction respectively extend along the first direction to form convex strips.

[0014] Preferably, the bonding position of the first bonding surface on the second surface does not overlap or partially overlaps with the protruding portion.

[0015] Preferably, in the first direction, an extension length of the second adhesive tape is smaller than an extension length of the first adhesive tape.

[0016] Preferably, the battery core adhesive paper further comprises a tearing portion, which is arranged on the side of the second release paper.

[0017] Another aspect of the utility model is to provide a battery, comprising:

[0018] A battery cell, wherein the top of the battery cell has a first edge seal and second edge seals arranged on both sides of the first edge seal, the first edge seal is arranged at an angle with the top plane of the battery cell, a tab is extended from the first edge seal, and the second edge seal is attached to the side of the battery cell;

[0019] A battery protection plate connected to the tab;

[0020] The battery cell adhesive paper as described above, the battery cell adhesive paper wraps the first edge seal, the second edge seal, the battery protection plate and the tab.

[0021] Preferably, the first adhesive tape is bonded to the first edge seal, and the raised portion of the first adhesive tape bypasses the first edge seal and is bonded to the back of the battery cell; the fourth side of the second adhesive tape is bonded to the battery protection plate, and the fourth side bypasses the battery protection plate and the tab and is bonded to the back of the battery cell.

[0022] Preferably, the convex strip of the first adhesive tape is adhered to a surface of the second edge seal facing the pole lug, and is folded to a surface of the second edge seal facing away from the pole lug.

[0023] Compared with the prior art, the battery tape and battery of the utility model embodiment have the following beneficial effects:

[0024] The battery core adhesive tape of the embodiment of the utility model includes a first release paper, a first adhesive tape, an adhesive layer, a second adhesive tape, and a second release paper. The first adhesive surface of the adhesive layer is bonded to the first adhesive tape, and the second adhesive tape is bonded to the second adhesive surface of the adhesive layer. The first adhesive tape and the second adhesive tape are bonded and fixed by the adhesive layer. When in use, after the first adhesive tape is positioned and bonded to the head of the battery, the positions of the adhesive layer and the second adhesive tape are fixed accordingly. The entire process only requires positioning the first adhesive tape, which reduces the adhesive tape positioning process, thereby reducing the positioning and installation error. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of an explosion of the battery core adhesive tape according to an embodiment of the utility model;

[0026] Figure 2 It is an exploded side view of the battery core adhesive tape according to the embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the assembly of the battery core adhesive tape according to the embodiment of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the first adhesive tape in the embodiment of the utility model;

[0029] Figure 5 It is a schematic diagram of the explosion of the second adhesive tape in the embodiment of the utility model;

[0030] Figure 6 Schematic diagram of an explosion of a battery according to an embodiment of the utility model;

[0031] Figure 7 It is a schematic diagram of the assembly of the battery described in the embodiment of the utility model;

[0032] Figure 8 yes Figure 7 A partial enlarged schematic diagram of part A;

[0033] Fig. 9 yes Figure 7 A schematic front view of the battery described in;

[0034] Fig.10 yes Fig. 9 BB section view in.

[0035] Numbers in the figure:

[0036] 100, battery core adhesive tape; 1, first release paper; 2, first adhesive tape; 201, first side; 202, second side; 21, raised portion; 211, avoidance groove; 212, groove; 22, convex strip; 3, adhesive layer; 31, first adhesive surface; 32, second adhesive surface; 321, first edge; 322, second edge; 4, second adhesive tape; 401, third side; 402, fourth side; 41, first adhesive tape body; 42, thermal conductive sheet; 43, second adhesive tape body; 5, second release paper; 51, tearing portion;

[0037] 200, battery cell; 210, first edge sealing; 220, second edge sealing; 230, tab;

[0038] 300, battery protection board;

[0039] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0040] In the description of the present invention, it should be noted that the terms "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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.

[0042] 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.

[0043] See also Figure 1-Figure 5The embodiment of the utility model provides a battery core adhesive paper 100, including a first release paper 1, a first adhesive paper 2, an adhesive layer 3, a second adhesive paper 4 and a second release paper 5. The first adhesive paper 2 has a first surface 201 and a second surface 202 arranged opposite to each other, the first surface 201 has adhesive, and the first surface 201 is bonded to the first release paper 1; the first adhesive paper 2 is provided with protrusions 21 at intervals along the first direction X, and avoidance grooves 211 are formed between adjacent protrusions 21; the adhesive layer 3 has a first adhesive surface 31 and a second adhesive surface 32 arranged opposite to each other, and the first adhesive surface 31 is bonded to the second surface 202; the second adhesive paper 4 has a third surface 401 and a fourth surface 402 arranged opposite to each other, the third surface 401 is partially bonded to the second adhesive surface 32, and the fourth surface 402 has adhesive; the second release paper 5 is bonded to the fourth surface 402.

[0044] The first adhesive tape 2 and the second adhesive tape 4 are bonded and fixed by the adhesive layer 3. When in use, after the first adhesive tape 2 is positioned and bonded to the head of the battery, the positions of the adhesive layer 3 and the second adhesive tape 4 are fixed accordingly. The entire process only requires positioning of the first adhesive tape 2, which reduces the adhesive tape positioning process, thereby reducing positioning and installation errors.

[0045] The first release paper 1 is used as the base paper of the entire battery cell adhesive paper 100. The first adhesive paper 2 is used to encapsulate the top of the battery cell 200 to prevent the top of the battery cell 200 from exposing aluminum and causing tip discharge corrosion with external moisture. The second adhesive paper 4 is used to wrap the battery protection plate 300 of the battery to protect the battery protection plate 300. The second release paper 5 is used as a protective layer of the second adhesive paper 4.

[0046] See also Figure 4 In some embodiments, the two ends of the first adhesive tape 2 in the first direction X extend along the first direction X to form convex strips 22. The convex strips 22 are used to wrap the side of the top of the battery cell 200, thereby wrapping the top of the battery cell 200. The first adhesive tape 2 is in the shape of a long strip, having a long side and a short side. The raised portion 21 is provided on the long side of the first adhesive tape 2, and one side of the short side of the first adhesive tape 2 extends along the first direction X to form the convex strips 22. The width of the convex strips 22 may be less than or equal to the width of the first adhesive tape 2.

[0047] See also Figure 4 In some embodiments, three protrusions 21 are provided, and the three protrusions 21 form two avoidance grooves 211, which are used to avoid the tabs 230 of the battery cell 200, so as to facilitate the first adhesive tape 2 to wrap the top of the battery cell 200. The two ends of the bottom of the avoidance groove 211 in the first direction X are respectively recessed toward the direction close to the first adhesive tape 2 to form grooves 212. The protrusion 21 is partially separated from the first adhesive tape 2 by the grooves 212, so that the protrusion 21 is conveniently bent and bonded to the back of the battery cell 200 to wrap the battery cell 200.

[0048] See also Figure 1 and Figure 2 In some embodiments, the second direction Y is set as the reference direction, the first adhesive surface 31 and the second adhesive surface 32 both have a first edge 321 and a second edge 322 arranged opposite to each other along the second direction Y, the first adhesive tape 2 is aligned with the first edge 321 of the first adhesive surface 31 on one side of the second direction Y, and the second adhesive tape 4 is aligned with the second edge 322 of the second adhesive surface 32 on one side of the second direction Y, so that the adhesive layer 3 firmly adheres the first adhesive tape 2 and the second adhesive tape 4, and avoids the first adhesive surface 31 or the second adhesive surface 32 from contacting the battery cell 200. The second direction Y is arranged to intersect with the first direction X. In some embodiments, the second direction Y is substantially perpendicular to the first direction X, wherein the angle between the second direction Y and the first direction X can be considered substantially perpendicular in the range of 89° to 91°. In some embodiments, the adhesive layer 3 is rectangular, the first direction X is parallel to the length direction of the adhesive layer 3, and the second direction Y is parallel to the width direction of the adhesive layer 3.

[0049] In some embodiments, the bonding position of the first bonding surface 31 on the second surface 202 does not overlap or partially overlaps with the protrusion 21, and the first bonding surface 31 does not completely cover the protrusion 21 and the avoidance groove 211 between the protrusions 21, so as to avoid the adhesive layer 3 completely covering the avoidance groove 211 to affect the avoidance of the pole ear 230, and to avoid the adhesive layer 3 interfering with the folding of the protrusion 21.

[0050] See also Figure 3 In some embodiments, in the first direction X, the extension length of the second adhesive tape 4 is less than the extension length of the first adhesive tape 2 , thereby reducing the adhesive tape cost while ensuring that the second adhesive tape 4 can wrap the battery protection plate 300 .

[0051] See also Figure 5In some embodiments, the second adhesive tape 4 includes a first adhesive tape body 41, a heat conductive sheet 42 and a second adhesive tape body 43, and the heat conductive sheet 42 is disposed between the first adhesive tape body 41 and the second adhesive tape body 43; the side of the first adhesive tape body 41 facing away from the second adhesive tape body 43 forms a third side 401, and the side of the second adhesive tape body 43 facing away from the first adhesive tape body 41 forms a fourth side 402. The heat conductive sheet 42 is encapsulated between the first adhesive tape body 41 and the second adhesive tape body 43. When the second adhesive tape 4 is wrapped on the battery protection board 300, the heat generated by the battery protection board 300 can be conducted out through the heat conductive sheet 42. The heat conductive sheet 42 is made of a heat conductive material. The heat conductive sheet 42 can be a graphite sheet or a boron nitride sheet, etc. In some embodiments, the area of ​​the first adhesive tape body 41 is greater than the area of ​​the second adhesive tape body 43, the area of ​​the heat conductive sheet 42 is less than or equal to the area of ​​the second adhesive tape body 43, the edge of the second adhesive tape body 43 is bonded to the first adhesive tape body 41, and the side of the second adhesive tape body 43 facing away from the first adhesive tape body 41 and the side of the first adhesive tape body 41 facing the second adhesive tape body 43 and not covered by the second adhesive tape body 43 together form the fourth surface 402. In other embodiments, the area of ​​the first adhesive tape body 41, the area of ​​the second adhesive tape body 43, and the area of ​​the heat conductive sheet 42 are equal.

[0052] See also Figure 1 In some embodiments, the battery adhesive paper 100 further includes a tearing portion 51 disposed on the side of the second release paper 5 to facilitate peeling off the second release paper 5. The tearing portion 51 is strip-shaped and extends along the first direction X.

[0053] See also Figure 6-Figure 10 The embodiment of the utility model also provides a battery, including a battery cell 200, a battery protection plate 300 and a battery cell adhesive tape 100, the top of the battery cell 200 has a first edge seal 210 and a second edge seal 220 arranged on both sides of the first edge seal 210, the first edge seal 210 is arranged at an angle to the top plane of the battery cell 200, a pole ear 230 is led out from the first edge seal 210, and the second edge seal 220 is attached to the side of the battery cell 200; the battery protection plate 300 is connected to the pole ear 230; the battery cell adhesive tape 100 is the battery cell adhesive tape 100 as described above, and the battery cell adhesive tape 100 wraps the first edge seal 210, the second edge seal 220, the battery protection plate 300 and the pole ear 230 to form a package for the top of the battery cell 200.

[0054] See also Figure 7-Figure 10In some embodiments, the first adhesive tape 2 is bonded to the first edge seal 210, and each protrusion 21 of the first adhesive tape 2 is folded around the first edge seal 210 and bonded to the back of the battery cell 200, and the tab 230 is located in the avoidance groove 211 formed by the adjacent protrusions 21; the fourth side 402 of the second adhesive tape 4 is bonded to the battery protection board 300, and the fourth side 402 is bonded to the back of the battery cell 200 around the battery protection board 300 and the tab 230. After the second adhesive tape 4 is folded, a receiving cavity is formed, and the battery protection board 300 and the tab 230 are both located in the receiving cavity to prevent the battery protection board 300 and the tab 230 from being exposed. The fourth side 402 of the second adhesive tape 4 has adhesive, which can be directly bonded and fixed to the battery protection board 300. It should be noted that the extension length of the second adhesive tape 4 in the first direction X can completely cover the battery protection board 300.

[0055] See also Figure 8 and Fig.10 In some embodiments, the convex strip 22 of the first adhesive tape 2 is adhered to the side surface of the second edge seal 220 facing the tab 230, and is folded to the side surface of the second edge seal 220 facing away from the tab 230, and the second edge seal 220 is wrapped by the convex strip 22.

[0056] When the battery core adhesive tape 100 of the present invention is used to package the top of the battery, the specific operation process is as follows:

[0057] First, tear off the first release paper 1 to separate the first adhesive paper 2 from the first release paper 1. Then, adhere the first adhesive paper 2 to the first edge seal 210 of the battery cell 200 so that the pole ear 230 of the battery cell 200 is just located in the avoidance groove 211, fold the protrusion 21 and adhere it to the back of the battery cell 200, so that the first adhesive paper 2 wraps the first edge seal 210. Adhere the convex strip 22 to one side surface of the second edge seal 220, and fold it to the other side surface of the second edge seal 220, so that the convex strip 22 wraps the second edge seal 220. Then, bend the pole ear 230 of the battery cell 200, fix the battery protection plate 300 on the pole ear 230, and the battery protection plate 300 is bonded and fixed to the fourth side 402 of the second adhesive paper 4. Finally, the second adhesive tape 4 is folded around the battery protection plate 300 and the tab 230 to the back of the battery, so that the fourth side 402 of the second adhesive tape 4 is bonded and fixed to the back of the battery, thereby achieving bonding between the second adhesive tape 4 and the battery.

[0058] 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 principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A battery adhesive tape, characterized in that: include: A first release paper (1); The first adhesive tape (2) comprises a first surface (201) and a second surface (202) arranged opposite to each other, the first surface (201) has adhesive, and the first surface (201) is bonded to the first release paper (1); the first adhesive tape (2) is provided with raised portions (21) at intervals along a first direction (X), and avoidance grooves (211) are formed between adjacent raised portions (21); An adhesive layer (3) having a first adhesive surface (31) and a second adhesive surface (32) disposed opposite to each other, wherein the first adhesive surface (31) is bonded to the second surface (202); A second adhesive tape (4) having a third surface (401) and a fourth surface (402) disposed opposite to each other, wherein the third surface (401) is partially bonded to the second bonding surface (32), and the fourth surface (402) has adhesive; The second release paper (5) is bonded to the fourth surface (402).

2. The battery adhesive tape according to claim 1, characterized in that: The second adhesive tape (4) includes a first adhesive tape body (41), a heat conductive sheet (42) and a second adhesive tape body (43), wherein the heat conductive sheet (42) is arranged between the first adhesive tape body (41) and the second adhesive tape body (43); the side of the first adhesive tape body (41) facing away from the second adhesive tape body (43) forms the third side (401), and the side of the second adhesive tape body (43) facing away from the first adhesive tape body (41) forms the fourth side (402).

3. The battery adhesive tape according to claim 1, characterized in that: Taking the set second direction (Y) as a reference direction, the first adhesive surface (31) and the second adhesive surface (32) both have a first edge (321) and a second edge (322) arranged relatively along the second direction (Y), the first adhesive tape (2) is aligned with the first edge (321) of the first adhesive surface (31) on one side in the second direction (Y), and the second adhesive tape (4) is aligned with the second edge (322) of the second adhesive surface (32) on one side in the second direction (Y).

4. The battery adhesive tape according to claim 1, characterized in that: Two ends of the first adhesive tape (2) in the first direction (X) respectively extend along the first direction (X) to form convex strips (22).

5. The battery adhesive tape according to claim 1, characterized in that: The bonding position of the first bonding surface (31) on the second surface (202) does not overlap or partially overlaps with the raised portion (21).

6. The battery adhesive tape according to claim 1, characterized in that: In the first direction (X), the extension length of the second adhesive tape (4) is smaller than the extension length of the first adhesive tape (2).

7. The battery adhesive tape according to claim 1, characterized in that: The battery core adhesive paper (100) further comprises a tearing portion (51) which is arranged on the side of the second release paper (5).

8. A battery, characterized in that: include: A battery cell (200), wherein the top of the battery cell (200) comprises a first edge seal (210) and second edge seals (220) arranged on both sides of the first edge seal (210), the first edge seal (210) is arranged at an angle with the top plane of the battery cell (200), a pole ear (230) is extended from the first edge seal (210), and the second edge seal (220) is attached to the side of the battery cell (200); A battery protection plate (300) connected to the tab (230); The battery tape (100) according to any one of claims 1 to 7, wherein the battery tape (100) wraps the first edge seal (210), the second edge seal (220), the battery protection plate (300) and the tab (230).

9. The battery according to claim 8, characterized in that The first adhesive tape (2) is bonded to the first edge seal (210), and the raised portion (21) of the first adhesive tape (2) bypasses the first edge seal (210) and is bonded to the back side of the battery cell (200); the fourth side (402) of the second adhesive tape (4) is bonded to the battery protection board (300), and the fourth side (402) bypasses the battery protection board (300) and the tab (230) and is bonded to the back side of the battery cell (200).

10. The battery according to claim 8, characterized in that The convex strip (22) of the first adhesive tape (2) is bonded to a surface of the second edge seal (220) facing the pole lug (230), and is folded to a surface of the second edge seal (220) facing away from the pole lug (230).

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