Battery top cover patch and battery shell

Abstract

The invention belongs to the technical field of batteries, and discloses a battery top cover patch and a battery shell, the battery top cover patch comprises an insulating sheet, release paper and bonding glue, the release paper comprises a connecting area distributed with a plurality of through structures arranged at intervals, the projection area of each through structure on the insulating sheet in the first direction is S, and S is larger than or equal to 0.25 mm < 2 > and smaller than or equal to 1 mm < 2 >, and S is larger than or equal to 1 mm < 2 >. The bonding glue is arranged between the insulating sheet and the release paper, and the bonding glue is used for bonding the insulating sheet and the connecting area. By arranging the penetrating structure on the connecting area, on one hand, the bonding strength of the release paper when the insulating sheet is torn off is reduced, on the other hand, the area where the release paper adheres to the residual glue is reduced, the thickness of the bonding glue is prevented from being reduced, the probability that the insulating sheet falls off is reduced, and by limiting the projection area S of the penetrating structure, the bonding strength of the insulating sheet is improved. The amount of adhesive residues attached to the release paper during tearing is reduced, and meanwhile, the situation that the release paper automatically falls off from the insulating sheet due to the fact that the adhesive strength is too low is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular, to a battery top cover patch and a battery housing. Background Art

[0002] The structure of a lithium-ion battery generally includes a cover plate, a housing, a pole group, an electrolyte, an internal and external insulation protection structure, etc. The external insulation of the housing generally adopts methods such as spraying with an insulating material and covering with a PET insulating tape; the insulation of the cover plate is generally achieved by pasting a PC insulating top cover patch.

[0003] Among them, the top cover patch generally includes two layers, which are composed of an insulating film and a release paper. An adhesive is provided between the insulating film and the release paper. When setting the top cover patch on the cover plate, after the clamping device tears off the release paper on the top cover patch, the adhesive on the insulating film is exposed, and then the insulating film is adhered to the cover plate by using the adhesive to complete the insulation operation of the cover plate.

[0004] However, for traditional top cover patches, when tearing off the release paper of the top cover patch, there is still a certain amount of residual glue attached to the release paper, which reduces the thickness of the adhesive, impairs the bonding effect when the insulating film is adhered to the cover plate, reduces the bonding strength, increases the probability of the insulating film falling off from the cover plate, and reduces the product quality. Summary of the Invention

[0005] The purpose of the present invention is to provide a battery top cover patch and a battery housing, which can reduce the residual glue adhered to the release paper when tearing off the release paper, thereby ensuring the thickness of the adhesive, improving the bonding effect and strength when the insulating film is adhered to the cover plate body, reducing the probability of the insulating film falling off, and improving the product quality.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] On the one hand, a battery top cover patch is provided, and the battery top cover patch includes:

[0008] An insulating sheet;

[0009] A release paper, the release paper includes a connection area, and a plurality of spaced-through structures are distributed on the connection area. The projection area of each through structure on the insulating sheet along a first direction is S, and it satisfies 0.25mm 2 ≤S≤1mm 2 ;

[0010] An adhesive, the adhesive is provided between the insulating sheet and the release paper, and the adhesive is used to realize the adhesion between the insulating sheet and the connection area.

[0011] Optionally, the spacing dimension between every two adjacent through-structures is W, and 0.5 mm ≤ W ≤ 1 mm is satisfied.

[0012] Optionally, the release paper further includes a clamping area, and the width of the clamping area in the second direction is smaller than the width of the connecting area in the second direction.

[0013] Optionally, a friction structure is provided on the clamping area.

[0014] Optionally, the cross-section of the through-structure is polygonal, circular or elliptical.

[0015] Optionally, the adhesive is contained in the area where the insulating sheet overlaps with the connecting area.

[0016] Optionally, a first avoidance structure is provided on the insulating sheet, and the first avoidance structure is arranged corresponding to the pole structure.

[0017] Optionally, a second avoidance structure is provided on the insulating sheet, and the second avoidance structure is arranged corresponding to the explosion-proof valve.

[0018] Optionally, the adhesive is tissue paper glue.

[0019] On the other hand, a battery housing is provided. The battery housing includes a cover plate body, a housing body, and the battery top cover patch as described in any one of the above. The housing body is a hollow housing structure with an opening. The cover plate body is arranged at the opening of the housing body to close the housing body and form an accommodation cavity for accommodating the electrode group. The battery top cover patch is attached to the side of the cover plate body facing away from the accommodation cavity.

[0020] Advantages of the present invention:

[0021] The present invention provides a battery top cover patch. By providing a plurality of through-structures distributed at intervals on the connecting area of the release paper bonded to the insulating sheet with an adhesive, the bonding area between the connecting area of the release paper and the insulating sheet is reduced. On the one hand, the bonding strength when the release paper is peeled off from the insulating sheet is reduced. On the other hand, the area where the release paper adheres to residual glue is reduced, making the peeling process of the release paper smoother and reducing the residual glue adhering to the release paper, thereby avoiding the reduction of the thickness of the adhesive, improving the bonding effect and strength when the insulating sheet is bonded to the cover plate body, reducing the probability of the insulating sheet falling off, improving the product quality, and by limiting the projected area S of each through-structure on the insulating sheet in the first direction to satisfy 0.25 mm 2 ≤ S ≤ 1 mm 2 , while ensuring the reduction of the amount of residual glue adhered when the release paper is peeled off, avoiding too low bonding strength, which may cause the release paper to fall off from the insulating sheet by itself.

[0022] The present invention also provides a battery housing. By applying the above-mentioned battery top cover patch, the bonding strength between the insulating sheet on the battery top cover patch and the cover body is ensured, the insulating sheet is prevented from detaching from the cover body due to insufficient bonding force, the risk of insulation failure is reduced, and the reliability and safety of the product are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural exploded view of the battery top cover patch provided by the present invention;

[0024] Figure 2 is a schematic structural view of the insulating sheet in the battery top cover patch provided by the present invention;

[0025] Figure 3 is a partial schematic structural view of the release paper in the battery top cover patch provided by the present invention.

[0026] In the figure:

[0027] 1, insulating sheet; 11, first avoidance structure; 12, second avoidance structure;

[0028] 2, release paper; 21, connection area; 22, through structure; 23, clamping area; 24, friction structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that, for the sake of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0030] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] At present, when tearing off the release paper adhered to the insulating film on the top cover patch, due to the excessive adhesion force, a large amount of residual glue adheres to the release paper when the release paper is torn off, thereby reducing the thickness of the glue layer used for bonding and fixing on the insulating film, damaging the bonding effect when the insulating film is bonded to the cover plate, reducing the bonding force, increasing the probability of the insulating film falling off the cover plate, and reducing the product quality.

[0034] Therefore, in order to reduce the residual glue adhering to the release paper when tearing off the release paper, ensure the thickness of the bonding glue, improve the bonding effect and force between the insulating film and the cover plate, reduce the probability of the insulating film falling off, and improve the product quality, this embodiment provides a battery top cover patch.

[0035] As Figures 1 to 3 shown, the battery top cover patch includes an insulating sheet 1, a release paper 2 and a bonding glue. The release paper 2 includes a connection area 21, and a plurality of spaced-through structures 22 are distributed on the connection area 21. The projected area of each through structure 22 on the insulating sheet 1 along the first direction is S, and it satisfies 0.25mm 2 ≤S≤1mm 2 , and the bonding glue is provided between the insulating sheet 1 and the release paper 2, and the bonding glue is used to realize the bonding between the insulating sheet 1 and the connection area 21.

[0036] The battery top cover patch is provided with a plurality of through structures 22 distributed at intervals on the connection area 21 where the release paper 2 is bonded to the insulating sheet 1 through an adhesive, thereby reducing the bonding area between the connection area 21 of the release paper 2 and the insulating sheet 1. On the one hand, the bonding strength when the release paper 2 is peeled off from the insulating sheet 1 is reduced. On the other hand, the area where the release paper 2 adheres to residual glue is reduced, making the process of peeling off the release paper 2 smoother and reducing the residual glue adhering to the release paper 2. Thus, the reduction of the thickness of the adhesive is avoided, the effect and strength when the insulating sheet 1 is bonded to the cover body are improved, the probability of the insulating sheet 1 falling off is reduced, and the product quality is improved. And by limiting the projected area S of each through structure 22 on the insulating sheet 1 in the first direction, it is made to satisfy 0.25mm 2 ≤S≤1mm 2 , so as to ensure that while reducing the amount of residual glue adhered when the release paper 2 is peeled off, the bonding strength is not too low, thereby preventing the release paper 2 from falling off the insulating sheet 1 by itself.

[0037] The projected area S of each through structure 22 on the insulating sheet 1 in the first direction can be any value between 0.25mm 2 and 1mm 2 or the range between any two values, such as 0.25mm 2 , 0.5mm 2 , 0.75mm 2 , 1mm 2 etc.

[0038] Specifically, the cross-section of the through structure 22 is a polygon, a circle or an ellipse. The cross-sectional shape of the through structure 22 can be freely set according to requirements. In this embodiment, the through structure 22 is a square through hole. In addition, the adhesive used to bond and fix the insulating sheet 1 and the release paper 2 is tissue glue.

[0039] Optionally, the spacing dimension between every two adjacent through structures 22 is W, and it satisfies 0.5mm≤W≤1mm. By limiting the spacing dimension W between every two adjacent through structures 22 to satisfy 0.5mm≤W≤1mm, when the projected area of each through structure 22 on the insulating sheet 1 in the first direction is certain, it is ensured that the spacing between two adjacent through structures 22 is not too close, which may cause breakage during peeling and prevent the release paper 2 from being completely peeled off. On the other hand, it is ensured that the spacing between two through structures 22 is not too far, which may lead to too large a bonding area and the possibility of residual glue adhesion.

[0040] The spacing dimension W between every two adjacent through-structures 22 can be any value between 0.5 mm and 1 mm or a range between any two values, such as 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc.

[0041] In this embodiment, in order to verify the influence of the spacing dimension W between every two adjacent through-structures 22 and the dimension limitation of the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction on the battery top cover patch, as shown in Table 1, three groups of embodiments and eight groups of comparative examples are provided for testing.

[0042] Table 1

[0043]

[0044] In Embodiment 1, the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is set to be 0.35 mm 2 , and the spacing dimension W between every two adjacent through-structures 22 is set to be 0.5 mm. At this time, before peeling off the release paper 2, no automatic detachment of the release paper 2 is found, and after peeling off the release paper 2 from the insulating sheet 1, the release paper 2 is peeled off completely and there is no attached residual glue.

[0045] In Embodiment 2, the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is set to be 0.55 mm 2 , and the spacing dimension W between every two adjacent through-structures 22 is set to be 0.7 mm. At this time, before peeling off the release paper 2, no automatic detachment of the release paper 2 is found, and after peeling off the release paper 2 from the insulating sheet 1, the release paper 2 is peeled off completely and there is no attached residual glue.

[0046] In Embodiment 3, the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is set to be 0.85 mm 2 , and the spacing dimension W between every two adjacent through-structures 22 is set to be 0.9 mm. At this time, before peeling off the release paper 2, no automatic detachment of the release paper 2 is found, and after peeling off the release paper 2 from the insulating sheet 1, the release paper 2 is peeled off completely and there is no attached residual glue.

[0047] As can be seen from Embodiment 1 to Embodiment 3, when the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction satisfies 0.25 mm 2 ≤S≤1 mm 2When it is within the range, at this time, the projected area of the through-structure 22 is of moderate size. It can not only reduce the contact area and the adhesion force to avoid the situation of residual glue adhering when the release paper 2 is peeled off, but also avoid the adhesion force being too low due to the too large projected area of the through-structure 22, resulting in the release paper 2 automatically falling off from the insulating sheet 1 before peeling. When the distance dimension W between every two adjacent through-structures 22 satisfies the range of 0.5 mm ≤ W ≤ 1 mm, at this time, the distance between two adjacent through-structures 22 is moderate, which not only avoids the situation that two adjacent through-structures 22 are too close, resulting in the connection strength at their junction being too weak and breaking, but also avoids the situation that two adjacent through-structures 22 are too far apart, resulting in too large a contact area between them and the adhesive, resulting in residual glue when peeling.

[0048] In Comparative Example 1, it is set that the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is 0.45 mm 2 , and it is set that the distance dimension W between every two adjacent through-structures 22 is 0.2 mm. At this time, before peeling the release paper 2, no situation of the release paper 2 automatically detaching is found. After peeling the release paper 2 from the insulating sheet 1, there is no residual glue adhering to the release paper 2, but the release paper 2 breaks when peeled, and part of the release paper 2 is not peeled off, and the peeled release paper 2 is incomplete.

[0049] In Comparative Example 2, it is set that the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is 0.65 mm 2 , and it is set that the distance dimension W between every two adjacent through-structures 22 is 0.3 mm. At this time, before peeling the release paper 2, no situation of the release paper 2 automatically detaching is found. After peeling the release paper 2 from the insulating sheet 1, there is no residual glue adhering to the release paper 2, but the release paper 2 breaks when peeled, and part of the release paper 2 is not peeled off, and the peeled release paper 2 is incomplete.

[0050] It can be seen from Comparative Example 1 and Comparative Example 2 that when the distance dimension W between every two adjacent through-structures 22 is less than the minimum value of 0.5 mm ≤ W ≤ 1 mm, at this time, because two adjacent through-structures 22 are too close, the connection strength at their junction is too weak and breaks, resulting in the release paper 2 not being able to be completely peeled off through one peeling operation.

[0051] In Comparative Example 3, it is set that the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is 0.75 mm 2 , and it is set that the distance dimension W between every two adjacent through-structures 22 is 1.3 mm. At this time, before peeling the release paper 2, no situation of the release paper 2 automatically detaching is found. After peeling the release paper 2 from the insulating sheet 1, the release paper 2 is peeled off completely, but the peeled release paper 2 adheres with residual glue.

[0052] In Comparative Example 4, the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is set to 0.95 mm 2 , the spacing dimension W between every two adjacent through-structures 22 is set to 1.4 mm. At this time, before peeling off the release paper 2, no automatic detachment of the release paper 2 is found. After peeling off the release paper 2 from the insulating sheet 1, the release paper 2 is peeled off completely, but the peeled release paper 2 adheres with residual glue.

[0053] It can be seen from Comparative Example 3 to Comparative Example 4 that when the spacing dimension W between every two adjacent through-structures 22 is greater than the maximum value of 0.5 mm ≤ W ≤ 1 mm, at this time, the two adjacent through-structures 22 are too far apart, resulting in too large a contact area between the area therebetween and the adhesive, and thus there is residual glue when peeling off.

[0054] In Comparative Example 5, the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is set to 0.15 mm 2 , the spacing dimension W between every two adjacent through-structures 22 is set to 0.7 mm. At this time, before peeling off the release paper 2, no automatic detachment of the release paper 2 is found. After peeling off the release paper 2 from the insulating sheet 1, the release paper 2 is peeled off completely, but the peeled release paper 2 adheres with residual glue.

[0055] In Comparative Example 6, the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is set to 0.20 mm 2 , the spacing dimension W between every two adjacent through-structures 22 is set to 0.8 mm. At this time, before peeling off the release paper 2, no automatic detachment of the release paper 2 is found. After peeling off the release paper 2 from the insulating sheet 1, the release paper 2 is peeled off completely, but the peeled release paper 2 adheres with residual glue.

[0056] It can be seen from Comparative Example 5 to Comparative Example 6 that when the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is less than the minimum value of 0.25 mm 2 ≤ S ≤ 1 mm 2 , at this time, the area of the connection region 21 without the through-structure 22 is relatively large, resulting in too large a contact area with the adhesive, so that the bonding strength is still relatively high, and thus there is residual glue when peeling off.

[0057] In Comparative Example 7, the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is set to 1.1 mm 2 , the spacing dimension W between every two adjacent through-structures 22 is set to 0.9 mm. At this time, before peeling off the release paper 2, the automatic detachment of the release paper 2 is found.

[0058] In Comparative Example 8, the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is set to 1.2 mm 2 , and the spacing dimension W between every two adjacent through-structures 22 is set to 1 mm. At this time, before peeling off the release paper 2, it is found that the release paper 2 automatically detaches.

[0059] It can be seen from Comparative Example 7 to Comparative Example 8 that when the projected area S of each through-structure 22 on the insulating sheet 1 in the first direction is greater than 0.25 mm 2 ≤S≤1 mm 2 at the maximum value, at this time, the area of the connection region 21 without the through-structure 22 is small, resulting in too small a contact area with the adhesive, so that the bonding strength is too small, resulting in the situation that the release paper 2 automatically falls off before peeling.

[0060] Optionally, as Figure 3 shown, the release paper 2 further includes a clamping region 23, and the width of the clamping region 23 in the second direction is smaller than the width of the connection region 21 in the second direction. By providing the clamping region 23 on the release paper 2, it is convenient to clamp when peeling off the release paper 2, and by making the width of the clamping region 23 in the second direction smaller than the width of the connection region 21 in the second direction, it is convenient to distinguish between the connection region 21 and the clamping region 23.

[0061] Optionally, as Figure 3 shown, the clamping region 23 is provided with a friction structure 24. By providing the friction structure 24 on the clamping region 23, the frictional resistance during clamping of the clamping region 23 is increased, and it is avoided that the release paper 2 slides out of the clamping device when peeling off the release paper 2. In this embodiment, the friction structure 24 on the clamping region 23 is the same as the through-structure 22 provided on the connection region 21, both being square through-holes, so as to form a grid-shaped release paper 2, which is convenient for processing and manufacturing. In other embodiments, the friction structure 24 can also be in the form of raised friction lines, etc.

[0062] Optionally, the adhesive is contained in the region where the insulating sheet 1 overlaps with the connection region 21. By making the adhesive be contained in the region where the insulating sheet 1 overlaps with the connection region 21, it is avoided that the adhesive overflows from the connection region 21 or the insulating sheet 1 and adheres to other adjacent battery top cover patches.

[0063] Optionally, as Figure 2As shown in the figure, a first avoidance structure 11 is provided on the insulating sheet 1, and the first avoidance structure 11 is arranged corresponding to the pole column structure. By providing the first avoidance structure 11 corresponding to the pole column structure on the insulating sheet 1, interference with the pole column structure can be avoided when the insulating sheet 1 is attached to the cover body. The first avoidance structure 11 is adapted to the outer shape of the pole column structure, and according to different types of batteries, the number of first avoidance structures 11 provided on the insulating sheet 1 is also different. When using a square shell battery, two first avoidance structures 11 are provided on the insulating sheet 1, and when using a blade battery, only one first avoidance structure 11 is provided on the insulating sheet 1.

[0064] Optionally, as Figure 2 shown, a second avoidance structure 12 is provided on the insulating sheet 1, and the second avoidance structure 12 is arranged corresponding to the explosion-proof valve. By providing the second avoidance structure 12 corresponding to the explosion-proof valve on the insulating sheet 1, when the cover body completes the operation of attaching the insulating sheet 1, the explosion-proof valve is exposed to the outside, avoiding the insulating sheet 1 from affecting the gas release after the explosion-proof valve is opened. The second avoidance structure 12 is adapted to the outer shape of the explosion-proof valve.

[0065] In this embodiment, a battery housing is also provided. The battery housing includes a cover body, an outer housing body, and the above-mentioned battery top cover patch. The outer housing body is a hollow housing structure with an open mouth, and the cover body is arranged at the open mouth of the outer housing body to close the outer housing body, so as to form a receiving cavity for receiving the electrode group. The battery top cover patch is attached to the side of the cover body facing away from the receiving cavity. By applying the above-mentioned battery top cover patch, the bonding strength between the insulating sheet 1 on the battery top cover patch and the cover body is ensured, avoiding the insulating sheet 1 from detaching from the cover body due to too small bonding force, reducing the risk of insulation failure, and improving the reliability and safety of the product.

[0066] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Battery top cover patch, characterized in that: The battery top cover patch includes: Insulation sheet; Release paper, the release paper comprising a connection area, a plurality of spaced through structures are distributed on the connection area, the projection area of ​​each through structure on the insulating sheet along the first direction is S, and meets the requirements of 0.25mm 2 ≤S≤1mm 2 ; Adhesive glue, the adhesive glue is arranged between the insulating sheet and the release paper, and the adhesive glue is used to achieve bonding between the insulating sheet and the connecting area.

2. The battery top cover patch according to claim 1, characterized in that: The distance between any two adjacent through structures is W, and satisfies 0.5 mm ≤ W ≤ 1 mm.

3. The battery top cover patch according to claim 1, characterized in that: The release paper further includes a clamping area, and a width of the clamping area along the second direction is smaller than a width of the connecting area along the second direction.

4. The battery top cover patch according to claim 3, characterized in that: The clamping area is provided with a friction structure.

5. The battery top cover patch according to claim 4, characterized in that: The cross section of the penetrating structure is polygonal, circular or elliptical.

6. The battery top cover patch according to claim 1, characterized in that: The adhesive is contained in the area where the insulating sheet overlaps the connecting area.

7. The battery top cover patch according to claim 1, characterized in that: The insulating sheet is provided with a first avoidance structure, and the first avoidance structure is arranged corresponding to the pole structure.

8. The battery top cover patch according to claim 1, characterized in that: The insulating sheet is provided with a second avoidance structure, and the second avoidance structure is arranged corresponding to the explosion-proof valve.

9. The battery top cover patch according to claim 1, characterized in that: The bonding glue is tissue paper glue.

10. A battery housing, characterized in that: The battery shell comprises a cover body, an outer shell body and a battery top cover patch as described in any one of claims 1 to 9, wherein the outer shell body is a hollow shell structure with an opening, the cover body is arranged at the opening of the outer shell body to close the outer shell body to form an accommodating cavity for accommodating the electrode group, and the battery top cover patch is attached to a side of the cover body away from the accommodating cavity.

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