CN214589023U - Battery and terminal equipment - Google Patents

Abstract

The utility model provides a battery and terminal equipment relates to battery technical field to there is the technical problem that bonds easily became invalid in solving current lithium cell. The battery comprises a battery core and a membrane shell, wherein the battery core is positioned in the membrane shell, a plurality of glue coating layers are arranged between the battery core and the membrane shell at intervals, and the glue coating layers are connected with the battery core and the membrane shell. The glue coating layer comprises a plurality of glue points and at least one glue line, and the glue points are adjacent to each other and connected through the glue line. The utility model discloses can make the electric core and the membrane shell bonding of battery firm, improve the safety performance that falls of battery and terminal equipment.

Description

Battery and terminal equipment

Technical Field

The utility model relates to a battery technology field especially relates to a battery and terminal equipment.

Background

The lithium battery has the advantages of high energy density, long service life, environmental protection and the like. The lithium battery is widely applied to industries such as mobile phones, notebook computers, digital cameras, electric vehicles, electric tools, new energy automobiles and the like.

With the development of the market, the portable electronic product has higher and higher requirements on the safety performance of the lithium battery, especially on the falling safety performance. Lithium cell generally includes electric core and lithium cell membrane shell, and electric core is located lithium cell membrane shell, and at present, the scheme that lithium cell trade adopted usually is: and pasting double-sided adhesive tape on the front or back of the battery cell, and bonding the battery cell and the lithium battery membrane shell together through pressing.

However, the existing lithium battery has the problem that bonding is easy to lose efficacy, so that the battery core and the lithium battery membrane shell are easy to relatively slide when falling, and the falling safety performance of the lithium battery is reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one problem mentioned in the background art, the utility model provides a battery and terminal equipment, electric core and the membrane shell that can make the battery bond firmly, improve the safety performance that falls of battery and terminal equipment.

In order to realize the above object, on the one hand, the utility model provides a battery, including electric core and membrane shell, electric core is located the membrane shell, is provided with the rubber coating that a plurality of intervals set up between electric core and the membrane shell, and the rubber coating is connected electric core and membrane shell.

The rubber coating layer comprises a plurality of rubber points and at least one rubber line, and adjacent rubber points are connected through the rubber line.

The utility model provides a battery, through the rubber coating that sets up a plurality of intervals between electric core and membrane shell, the rubber coating is including gluing the point and gluing the line, when the battery ization becomes, adopts hot pressing to make electric core and membrane shell closely adhere together, has increased the bonding area of electric core and membrane shell, makes electric core and membrane shell bond more firmly, is difficult for taking place relative slip when falling, has improved the safety performance that falls of battery.

In the above battery, optionally, the battery cell is provided with a tab, the battery cell has a first direction and a second direction perpendicular to each other, and the extending direction of the tab is located in the first direction. The glue coating layer extends along the same direction.

Adjacent glue-coated layers have a first spacing therebetween.

In the above battery, optionally, the extending direction of each of the rubber-coated layers is located in the first direction, and the plurality of rubber-coated layers are arranged at intervals in the second direction.

In the above battery, optionally, the extending direction of each of the rubber-coated layers is located in the second direction, and the plurality of rubber-coated layers are arranged at intervals along the first direction.

In the above battery, optionally, the plurality of glue sites are spaced apart from each other with a first pitch between centers of adjacent glue sites.

In the above battery, optionally, the glue dots are circular in shape, and the diameter of the glue dots is between 0.5mm and 3 mm.

The length of the first pitch is 1.25-3 times the diameter of the glue dot.

The length of the first pitch is equal to the length of the first pitch.

In the above battery, optionally, the glue line has a rectangular shape, and the length of the glue line is 0.25 to 2 times the diameter of the glue dot.

The width of the glue line is less than or equal to the diameter of the glue dot.

In the above battery, the thickness of the rubber coating layer is optionally 5-40 μm.

In the above battery, optionally, the glue coating layer is located on a surface of the electric core, the surface of the electric core includes two oppositely disposed long side surfaces and two oppositely disposed short side surfaces, the long side surfaces and the short side surfaces are connected, and an outer ring of the electric core has a blank foil.

The gluing layer and the empty foil are both located on the long side face, first gummed paper is arranged on the empty foil, and the first gummed paper is connected with the empty foil and the battery cell.

Or the gluing layer is positioned on the long side face, the empty foil is positioned on the short side face, and second adhesive paper is arranged on the empty foil and connected with the empty foil and the battery cell.

On the other hand, the utility model provides a terminal equipment, this terminal equipment includes foretell battery.

The utility model provides a terminal equipment, the rubber coating that sets up through setting up a plurality of intervals between the electric core of battery and membrane shell, when the battery ization becomes, adopt hot pressing to make electric core and membrane shell closely adhere together, increased the bonding area of electric core and membrane shell, make electric core and membrane shell bond more firm, be difficult for taking place relative slip when falling, improved the safety performance that falls of battery and terminal equipment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a structure of a first battery (not including a membrane case) in the related art;

fig. 2 is a schematic structural view of a second battery (not including a membrane case) in the related art;

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

fig. 4 is a schematic view of a first structure of a glue coating layer of a battery on a battery cell according to an embodiment of the present invention;

fig. 5 is a schematic view of a second structure of a glue coating layer of a battery provided by an embodiment of the present invention on a battery cell;

fig. 6 is a schematic structural diagram of a partial glue coating layer of a battery provided in an embodiment of the present invention;

fig. 7 is a schematic view of a battery according to an embodiment of the present invention during hot-press bonding;

fig. 8 is a side view of a battery cell, a glue layer, and a film shell according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first adhesive tape and a battery cell of a battery provided in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a second adhesive tape and a battery cell of a battery provided in an embodiment of the present invention.

Description of reference numerals:

100-a battery;

10-electric core;

11-a tab;

12-long side;

13-short side;

14-empty foil;

15-first gummed paper;

16-second gummed paper;

20-a membrane shell;

30-gluing layer;

31-glue dots;

32-glue lines;

200-hot pressing fixture;

300-support plate.

Detailed Description

In the technical field of batteries, lithium batteries are widely applied to industries such as mobile phones, notebook computers, digital cameras, electric vehicles, electric tools, new energy vehicles and the like. With the development of the market, the portable electronic product has higher and higher requirements on the safety performance of the lithium battery, especially on the falling safety performance.

Fig. 1 is a schematic structural view of a first battery (not including a membrane case) in the related art, and fig. 2 is a schematic structural view of a second battery (not including a membrane case) in the related art. The battery 100 generally includes a battery core 10 and a film casing (not shown), the battery core 10 is located in the film casing, a tab 11 is provided on a "head" of the battery core 10, and currently, a scheme generally adopted by the industry is as follows: double-faced adhesive tape (not shown) is pasted on the front or back of the battery cell 10, and the battery cell 10 and the film shell are bonded together by pressing.

In addition, the battery cell 10 has a blank foil 14, a first adhesive tape 15 or a second adhesive tape 16 is disposed on the blank foil, the first adhesive tape 15 and the second adhesive tape 16 are used for fixing the wound battery cell 10, and the blank foil 14 and the first adhesive tape 15 (or the second adhesive tape 16) are disposed on the long side 12 or the short side 13 of the battery cell 10.

However, the bonding area of the battery is limited, and when the surface of the battery core is uneven, the bonding is prone to failure, so that the battery core and the film shell are prone to relative sliding when falling, and the falling safety performance of the lithium battery is reduced.

Further, there are the following problems: (1) the double-sided adhesive tape is thick, occupies the electric core space, leads to battery space utilization low, reduces lithium cell energy density. (2) In the process of gluing, the double-sided adhesive tape is easy to wrinkle, and the production yield of the lithium battery is affected. (3) The model changing is troublesome, the battery cores with different specifications usually need to be changed with the double-sided adhesive tape matched with the battery cores, and the debugging is troublesome and the production efficiency is influenced in the model changing process.

The utility model provides a battery and terminal equipment, the rubber coating layer through setting up a plurality of intervals setting between the electric core of battery and membrane shell, when the battery ization becomes, adopt hot pressing to make electric core and membrane shell closely adhere together, increased the bonding area of electric core and membrane shell, make electric core and membrane shell bond more firm, be difficult for taking place relative slip when falling, improved the safety performance that falls of battery and terminal equipment.

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 3 is a schematic structural diagram of a battery according to an embodiment of the present invention. Fig. 4 is a first schematic structural diagram of a glue coating layer of a battery provided by an embodiment of the present invention on a battery cell. Fig. 5 is a second schematic structural diagram of a glue coating layer of a battery provided by an embodiment of the present invention on a battery cell. Fig. 6 is a schematic structural view of a part of a glue coating layer of a battery provided by an embodiment of the present invention. Fig. 7 is a schematic view of a battery according to an embodiment of the present invention during hot-press bonding. Fig. 8 is a side view of a battery cell, a glue coating layer and a film shell provided by an embodiment of the present invention. Fig. 9 is a schematic structural diagram of a first adhesive tape and a battery cell of a battery provided by an embodiment of the present invention. Fig. 10 is a schematic structural diagram of a second adhesive tape and a battery cell of a battery provided in an embodiment of the present invention. Referring to fig. 3 to 10, the present invention provides a battery.

As shown in fig. 3, the battery 100 includes a battery cell 10 and a film casing 20, the battery cell 10 is located in the film casing 20, a plurality of glue layers 30 are disposed on a surface of the battery cell 10, the glue layers 30 are parallel to each other, the glue layer 30 is located between the battery cell 10 and the film casing 20, and the glue layer 30 connects the battery cell 10 and the film casing 20. The glue coating 30 comprises a plurality of glue sites 31 and at least one glue line 32, and adjacent glue sites 31 are connected by the glue line 32. It should be noted that the glue coating layer 30 may include two glue dots 31 and one glue line 32, or may include a plurality of glue dots 31 and a plurality of glue lines 32, and the number of the glue dots 31 and the glue lines 32 is not limited in this embodiment.

Through set up the rubber coating 30 that a plurality of intervals set up between electric core 10 and membrane shell 20, then encapsulate electric core 10 with membrane shell 20, through toasting-annotate liquid-ageing, when the battery becomes, closely the bonding together of electric core 10 and membrane shell 20 is made through the hot pressing, reaches the adhesive effect, and this kind of mode of setting up has increased the bonding area of electric core 10 and membrane shell 20, makes electric core 10 and membrane shell 20 bond more firmly, is difficult for taking place relative slip when falling, has improved the security performance that falls of battery 100.

In addition, the space of the battery core 10 occupied by the glue coating layer 30 is reduced to the greatest extent, the space utilization rate of the battery 100 is improved, and the energy density of the battery 100 is improved. Because the rubber coating 30 is convenient to set, the rubber coating can be adjusted according to the battery cores 10 with different specifications, and the phenomena of crumpling and the like can not occur, so that the production yield and the production efficiency of the battery 100 are improved.

It should be noted that the glue coating 30 may be disposed on the outer surface of the battery cell 10, or may be disposed on the inner surface of the membrane casing 20, and in this embodiment, the glue coating 30 is disposed on the outer surface of the battery cell 10. The embodiment is not limited to the specific location of the glue layer 30.

Specifically, the battery cell 10 is further provided with a tab 11, the battery cell 10 has a first direction and a second direction perpendicular to each other, the extending direction of the tab 11 is located in the first direction, as shown in fig. 4 and 5, the direction a represents the first direction, and the direction b represents the second direction. The rubberized layers 30 extend in the same direction.

It should be noted that, a first distance is provided between adjacent glue-coated layers 30, and in fig. 4 and 5, L1 indicates the first distance, and the first distance is set, so that on one hand, the glue-coated layers 30 have an extending or flowing direction in the hot-pressing process, which is convenient for enlarging the bonding area of the glue-coated layers 30, and makes the bonding between the battery cell 10 and the membrane shell 20 more stable. On the other hand, a gap is formed between the glue coating layers 30, so that the electrolyte or the gas can flow to the preset position along the gap conveniently. Specifically, the first distance may be a distance between centers of adjacent glue dots 31.

In one possible embodiment, as shown in fig. 4, each of the rubber-coated layers 30 extends in a first direction, and the plurality of rubber-coated layers 30 are spaced apart in a second direction. This helps gas generated by the cell 100 during cycling to vent along the gap between the rubberized layers 30 into the space between the opposite ends of the cell 100 in the first direction (i.e., the "head" and "tail" of the cell 100) and the membrane housing 20, enabling improved cell cycling.

In another possible embodiment, as shown in fig. 5, the extending direction of each rubber-coated layer 30 is in the second direction, and a plurality of rubber-coated layers 30 are arranged at intervals in the first direction. This helps discharge excess electrolyte or gas generated by formation of the battery 100 to the airbag belts on both sides of the battery 100 along the gap between the rubber-coated layers 30.

It should be noted that, in this embodiment, the extending direction of the glue layer 30 is parallel to the first direction or the second direction, and in addition, the extending direction of the glue layer 30 may also have an included angle with the first direction or the second direction, and the embodiment of the present invention does not limit the specific setting mode of the glue layer 30.

As shown in fig. 6, the glue coating 30 includes a plurality of glue dots 31, the glue dots 31 are circular, the glue dots 31 are spaced apart from each other, and the glue dots 31 have a first pitch therebetween. The glue coating 30 comprises a plurality of glue lines 32, the glue lines 32 are respectively positioned between the adjacent glue points 31 and connect the adjacent glue points 31, and thus the glue points 31 and the glue lines 32 jointly form a complete glue coating 30. The adhesive layer 30 may be solvent-based glue, hot melt adhesive or pressure sensitive adhesive, and the embodiment is not limited to the specific type of the adhesive layer 30.

Specifically, the thickness of the glue coating layer 30 may be 5-40 μm, for example, 5 μm, 8 μm, 10 μm, 15 μm, 20 μm, 30 μm or 40 μm, and the thickness range may be used to prevent the height of the glue dots 31 after hot pressing from being too small to reduce the adhesion between the film shell 20 and the battery cell 10, and to prevent the height after hot pressing from being too high to occupy too much space of the battery cell 10 to affect the energy density of the battery 100.

Specifically, as shown in fig. 6, D represents the diameter of the glue dot 31, and the diameter of the glue dot 31 may be between 0.5mm and 3mm, for example, the diameter may be 0.5mm, 1mm, 2mm, 2.5mm, or 3 mm. The diameter range can avoid that the bonding area is too small after the glue dots 31 are hot-pressed to reduce the bonding force between the film shell 20 and the battery core 10, and can also prevent the diameter of the glue dots 31 from being too large after the glue dots 31 are hot-pressed to influence the gaps between the glue dots 31, so that gas or electrolyte is not facilitated to flow along the gaps.

As shown in fig. 6, L2 represents a first pitch, the length of which is 1.25-3 times the diameter of the glue sites 31, and may be, for example, 1.25D, 1.5D, 2D, 2.5D, or 3D. Therefore, after hot pressing, the adjacent glue dots 31 respectively have extension or flowing spaces without mutual influence. Too large a first pitch tends to affect the adhesion of the glue layer 30, and too small a first pitch tends to cause the adjacent glue sites 31 to interfere with each other. Further, the length of the first pitch may be equal to the length of the first pitch. When the first distance is too small, on one hand, the glue dots 31 between the adjacent glue-coated layers 30 are mutually influenced, and on the other hand, the gaps between the adjacent glue-coated layers 30 disappear, so that the gas or the electrolyte is not favorably flowed along the gaps. When the first distance is too large, the number of the glue coating layers 30 which can be arranged on the surface of the limited battery cell 10 is too small, and the bonding force between the film shell 20 and the battery cell 10 is reduced.

Specifically, the shape of the glue line 32 may be rectangular, the length of the glue line 32 is 0.25 to 2 times the diameter of the glue dot 31, in fig. 6, a represents the length of the glue line 32, B represents the width of the glue line 32, and the length of the glue line 32 may be, for example, 0.25D, 0.5D, 0.8D, 1.2D, 1.6D, or 2D. Furthermore, the width of the glue line 32 may be smaller than or equal to the diameter of the glue sites 31, it being emphasized that the width of the glue line 32 must be larger than 0. It should be noted that the length of the glue line 32, the length of the first pitch, and the diameter of the glue dot 31 need to be matched with each other, and the length range can make the adjacent glue dots 31 have extension or flow spaces after hot pressing, respectively, and will not affect each other.

It should be noted that, by setting the diameter and the first pitch of the glue dots 31 and the length and the width of the glue lines 32 in the above ranges, the adhesion force of the glue coating layer 30 can be ensured, the space occupied by the battery core 10 of the battery 100 is reduced, and the energy density of the battery 100 is improved.

It should be noted that the numerical values and numerical ranges related to the embodiments of the present invention are approximate values, and there may be a certain range of errors due to the manufacturing process, and the error can be considered to be ignored by those skilled in the art.

It should be noted that the shapes of the glue dots 31 and the glue lines 32 are not limited to circular and rectangular, and may be other regular shapes or irregular shapes, and the shapes of the glue dots 31 and the glue lines 32 are not limited in this embodiment.

Specifically, the surface of the battery cell 10 includes two oppositely disposed long side surfaces 12 and two oppositely disposed short side surfaces 13, the long side surfaces 12 and the short side surfaces 13 are connected to form the surface of the battery cell 10, an empty foil 14 is provided on an outer ring of the battery cell 10, and after the winding of the battery cell 10 is completed, the empty foil 14 is used for ending.

In one possible embodiment, as shown in fig. 9, the glue coating 30 and the empty foil 14 are both located on the long side 12, the empty foil 14 is provided with the first glue paper 15, and the first glue paper 15 adheres the empty foil 14 and the battery cell 10, which is easy to fix the battery cell 10 due to the large area of the long side 12. In fig. 1, the present battery 100 also employs such a configuration that the dummy foil 14 and the first adhesive paper 15 are disposed on the long side 12.

In another possible embodiment, as shown in fig. 10, the glue layer 30 is located on the long side 12, the empty foil 14 is located on the short side 13, the second glue paper 16 is disposed on the empty foil 14, and the second glue paper 16 connects the empty foil 14 and the electric core 10, so that the second glue paper 16 and the glue layer 30 can avoid overlapping interference. This arrangement can prevent the second adhesive tape 16 from occupying the thickness space of the battery cell 10, improve the space utilization of the battery 100, and improve the energy density of the battery 100. In fig. 2, there is also present battery 100 in such a way that a dummy foil 14 and a second adhesive paper 16 are arranged on the short side 13.

Note that, the battery 100 may be provided with the rubber coating 30 by the following steps:

firstly, winding the battery cell 10, arranging a plurality of glue coating layers 30 parallel to each other on the long side 12 on the outermost side of the battery cell 10, wherein the specific extending direction of the glue coating layers 30 can be along the first direction or along the second direction, then packaging the battery cell 10 with the film shell 20, and making the battery 100 undergo the processes of baking, liquid injection and aging, and then, entering the formation process, and when forming, as shown in fig. 7, the support plate 300 supports the battery 100, and the hot-pressing fixture 200 applies pressure to the battery 100, specifically, the hot-pressing condition can be as follows: the temperature is 50-90 ℃, the pressure is 0.1-1.2 MPa, and the time is as follows: the time is more than or equal to 2 s. Therefore, on one hand, the battery cell 10 and the membrane shell 20 can be tightly abutted, on the other hand, the adhesive layer 30 can release viscosity to achieve the adhesion effect, and fig. 8 is a side view of the battery cell 10 and the membrane shell 20 after adhesion is completed.

On the other hand, the embodiment of the utility model provides a terminal equipment is still provided, and this terminal equipment includes foretell battery 100, and is concrete, and this terminal equipment can be cell-phone, notebook computer, digital camera, super-mobile personal computer (UMPC), handheld computer, intercom, netbook, POS machine, Personal Digital Assistant (PDA), wearable equipment, virtual reality equipment etc. have the removal or the fixed terminal of battery.

The embodiment of the utility model provides a terminal equipment sets up the rubber coating 30 that a plurality of intervals set up through the surface at battery 100's electric core 10, when the battery ization becomes, adopts hot pressing to make electric core 10 closely adhere with membrane shell 20 and be in the same place, has increased the bonding area of electric core 10 and membrane shell 20, makes electric core 10 and membrane shell 20 bond more firmly, is difficult for taking place relative slip when falling, has improved battery 100 and terminal equipment's the security performance that falls.

In the description of the embodiments of the present invention, it should be understood that the terms "mounted," "connected," and "connected" are intended to be construed broadly, e.g., to mean a fixed connection, an indirect connection through intervening media, a connection between two elements, or an interaction between two elements, unless expressly stated or limited otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. The terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A battery is characterized by comprising an electric core and a membrane shell, wherein the electric core is positioned in the membrane shell, a plurality of glue coating layers which are arranged at intervals are arranged between the electric core and the membrane shell, and the glue coating layers are connected with the electric core and the membrane shell;

the glue coating layer comprises a plurality of glue points and at least one glue line, and the glue points are adjacent to each other and connected through the glue line.

2. The battery of claim 1, wherein the battery cell is provided with a tab, the battery cell has a first direction and a second direction perpendicular to each other, and the extending direction of the tab is located in the first direction; the glue coating layers extend along the same direction;

and a first interval is formed between every two adjacent glue coating layers.

3. The battery of claim 2, wherein each of the rubber-coated layers extends in the first direction, and the rubber-coated layers are spaced apart from each other in the second direction.

4. The battery of claim 2, wherein each of the rubber-coated layers extends in the second direction, and the rubber-coated layers are spaced apart from each other in the first direction.

5. The battery of claim 2, wherein a plurality of the glue sites are spaced apart from one another with a first pitch between centers of adjacent glue sites.

6. The battery of claim 5, wherein the glue sites are circular in shape and have a diameter of between 0.5mm and 3 mm;

the length of the first pitch is 1.25-3 times of the diameter of the glue dot;

the length of the first pitch is equal to the length of the first pitch.

7. The battery of claim 6, wherein the glue line is rectangular in shape, and the length of the glue line is 0.25-2 times the diameter of the glue dot;

the width of the glue line is smaller than or equal to the diameter of the glue dot.

8. The cell according to any one of claims 1 to 7, wherein the thickness of the rubber-coated layer is between 5 and 40 μm.

9. The battery of any one of claims 1-7, wherein the glue coating is located on a surface of the cell, the surface of the cell comprises two oppositely arranged long sides and two oppositely arranged short sides, the long sides and the short sides are connected, and the outer ring of the cell is provided with a hollow foil;

the glue coating layer and the hollow foil are both positioned on the long side face, first adhesive paper is arranged on the hollow foil, and the first adhesive paper is connected with the hollow foil and the battery cell;

or the gluing layer is positioned on the long side face, the hollow foil is positioned on the short side face, and second adhesive paper is arranged on the hollow foil and connected with the hollow foil and the battery cell.

10. A terminal device, characterized in that it comprises a battery according to any one of claims 1-9.

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