Battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery and electric equipment, the battery comprises: a housing, at least part of which is provided with an opening; the cover plate covers the opening of the shell; the insulating film covers the peripheral side of the shell, and at least part of the insulating film covers the cover plate; the top cover patch is attached to the cover plate, and at least part of the top cover patch is overlapped with the insulating film; the insulating film comprises a long edge covering part extending along the long edge of the opening and a short edge covering part extending along the short edge of the opening; the long-edge covering part and the short-edge covering part are arranged discontinuously, and an avoiding area is formed between the long-edge covering part and the short-edge covering part; the top cover patch is attached to the avoiding area. According to the battery provided by the utility model, the attaching effect of the insulating film on the cover plate can be ensured, the warping of the insulating film is avoided, and meanwhile, due to the existence of the avoiding area, the attaching area of the top cover patch and the cover plate can be increased, and the warping problem of the top cover patch is avoided.

Description

Technical Field

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

[0002] A battery generally includes an internal structure and an external structure. The internal structure of the battery mainly includes a battery cell pole group, and the external structure of the battery mainly includes a battery cover, a battery shell and a battery cell insulating component; the battery shell provides a storage space for the battery cell pole group, and the battery cover and the battery shell are welded together to form a closed space. Finally, a layer of insulating film is attached to the surface of the battery shell and the surface of the battery cover to form a complete battery structure.

[0003] The insulating film can prevent the metal shell of the battery from short-circuiting with the outside, play an insulating role, and also prevent the battery shell from being worn and scratched. In addition, since the battery cover needs to lead out the pole, the insulating film cannot completely wrap the battery cover, so a top cover patch is usually attached to the battery cover, which has the same function as the insulating film, both of which play the role of insulation and protection.

[0004] However, in the actual production of batteries, due to the coating tolerance of the insulating film, a part of the surplus will be left on the battery cover, and this part of the surplus is usually folded at the corners of the battery cover. After the insulating film is folded, the corners are prone to warp up, and the upturned corners are prone to warp up with the top cover patch. The upturned top cover patch not only has the risk of battery short circuit, but also affects the bonding of the flexible circuit board of the battery module, thereby causing the battery module to fail. Utility Model Content

[0005] In view of this, the utility model provides a battery and an electrical device to solve the problem that the folded corner of the insulating film is prone to warp up after being folded and the top cover patch is prone to warp up together.

[0006] In a first aspect, the utility model provides a battery, comprising:

[0007] The shell has an opening formed in at least a part of the area;

[0008] A cover plate, arranged to cover the opening of the shell;

[0009] An insulating film is coated on the outer peripheral side of the shell, and the insulating film at least partially covers the cover plate;

[0010] A top cover patch is attached to the cover plate, and the top cover patch at least partially overlaps with the insulating film;

[0011] The insulating film includes a long side covering portion extending along the long side of the opening and a short side covering portion extending along the short side of the opening;

[0012] The long side covering portion and the short side covering portion are arranged discontinuously, and an escape zone is formed between the long side covering portion and the short side covering portion;

[0013] The top cover patch is fitted with the avoidance area.

[0014] Beneficial effect: The battery provided by the embodiment of the utility model can ensure the adhesion effect of the insulating film on the cover plate and avoid the warping of the insulating film by making the long side covering part and the short side covering part of the insulating film non-continuously set, forming an escape zone between the long side covering part and the short side covering part, and making the top cover patch fit the escape zone, and at the same time, due to the existence of the escape zone, the top cover patch is fit to the escape zone, which can increase the fitting area of ​​the top cover patch and the cover plate and avoid the warping problem of the top cover patch. Improve the overall bonding reliability and positioning accuracy of the insulating film and the shell, the top cover patch and the cover plate; further improve production efficiency, reduce production costs, and reduce the number of secondary re-fitting after production.

[0015] In an optional embodiment, the dimension of the long side covering portion covering the cover plate in a direction perpendicular to the long side of the opening is a1, and the dimension of the short side covering portion covering the cover plate in a direction perpendicular to the short side of the opening is a2; wherein a1 satisfies: 2mm≤a1≤5mm, and a2 satisfies: 2mm≤a2≤5mm.

[0016] In an optional implementation, a1 and a2 satisfy: a1=a2.

[0017] Beneficial effect: By limiting the lower limit of the size of a1 and a2, the insufficient bonding strength between the insulating film and the cover plate can be avoided, and warping can be prevented; and by limiting the upper limit of the size of a1 and a2, it can avoid the long side covering part and the short side covering part being too large to occupy the area of ​​the top cover patch attached to the cover plate, which is beneficial to ensure the firmness of the top cover patch, and at the same time can avoid the increase in manufacturing costs caused by the excessive length of the insulating film.

[0018] In an optional embodiment, along a direction perpendicular to the long side of the opening, the distance between the outer edge of the top cover patch and the edge of the corresponding cover plate is b1; wherein b1 satisfies: b1 = (Nn) / 2;

[0019] Along the direction perpendicular to the short side of the opening, the distance between the outer edge of the top cover patch and the edge of the corresponding cover plate is b2; wherein b2 satisfies: b2 = (Mm) / 2;

[0020] Among them, M and N are the length and width dimensions of the cover plate, respectively, and m and n are the length and width dimensions of the top cover patch, respectively.

[0021] In an optional implementation, b1 and b2 satisfy: 0mm≤b1=b2≤2mm.

[0022] Beneficial effect: By limiting the upper limits of the values ​​of b1 and b2, it is possible to avoid the size of the top cover patch being too small, thereby preventing the fitting area between the top cover patch and the long side covering part and the short side covering part from being too small, and preventing the top cover patch from warping.

[0023] In an optional embodiment, a pole is further provided on the cover plate, and an opening is formed at a position of the top cover patch corresponding to the pole; an edge of the top cover patch corresponding to the pole is an inner edge of the top cover patch;

[0024] Along the direction perpendicular to the long side of the opening, the distance between the outer edge of the pole and the inner edge of the top cover patch is b3, and satisfies: 0mm≤b3≤1mm.

[0025] Beneficial effect: By limiting the upper limit of b3, it is possible to avoid the outer edge of the pole and the inner edge of the top cover patch being too large, avoid reducing the area of ​​the top cover patch fitting the cover plate, and prevent the insulation performance of the top cover patch on the cover plate from decreasing.

[0026] In an optional embodiment, along a direction perpendicular to the long side of the opening, the distance between the inner edge and the outer edge of the top cover patch is c, and satisfies: c≥2 mm.

[0027] Beneficial effect: By limiting the lower limit of c, it is possible to avoid the distance between the inner edge and the outer edge of the top cover patch being too small, thereby preventing the top cover patch from being attached to the cover plate and the folding edge size of the insulating film from being small, avoiding the reduction in the bonding effect of the top cover patch on the insulating film and the cover plate, preventing the insulating film and the top cover patch from warping, and reducing the risk of battery insulation failure.

[0028] In an optional embodiment, along the direction perpendicular to the long side of the opening, the distance between the inner edge of the long side covering portion and the outer edge of the top cover patch is d1, and satisfies: 75%≤d1 / a1<100%;

[0029] Along the direction perpendicular to the short side of the opening, the distance between the inner edge of the short side covering portion and the outer edge of the top cover patch is d2, and satisfies: 75%≤d2 / a2<100%.

[0030] Beneficial effects: By limiting the lower limit of d1 / a1, it is possible to avoid the gap between the edge of the long side covering part and the outer edge of the top cover patch being too small, prevent the top cover patch from being loosely bonded to the long side covering part, and reduce the risk of insulation failure; and by limiting the upper limit of d1 / a1, it is possible to avoid the insufficient bonding area between the top cover patch and the cover plate, prevent the top cover patch from being loosely bonded, avoid material waste of the insulation film, and reduce costs. By limiting the lower limit of d2 / a2, it is possible to avoid the gap between the edge of the short side covering part and the outer edge of the top cover patch being too small, prevent the top cover patch from being loosely bonded to the short side covering part, and reduce the risk of insulation failure; and by limiting the upper limit of d2 / a2, it is possible to avoid the insufficient bonding area between the top cover patch and the cover plate, prevent the top cover patch from being loosely bonded, avoid material waste of the insulation film, and reduce costs.

[0031] In an optional implementation, the minimum distance between adjacent long-side covering portions and short-side covering portions is d3, and satisfies: 2mm≤d3≤5mm.

[0032] Beneficial effect: By limiting the lower limit of p / q, the overlapping area between the top cover patch and the avoidance zone can be prevented from being too small, preventing the top cover patch from being loosely adhered and preventing the top cover patch from warping. By limiting the upper limit of p / q, the insufficient adhesion area between the insulating film and the cover plate can be avoided, preventing the insulating film from easily warping.

[0033] In a second aspect, the utility model further provides an electrical device, comprising the battery as described above.

[0034] Since the electrical equipment includes a battery and has the same effect as the battery, it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is an overall schematic diagram of the battery of the utility model;

[0037] Figure 2 This is a schematic diagram of the disassembled state of the battery of the utility model;

[0038] Figure 3 It is a schematic diagram of a protective film package covering plate of the utility model;

[0039] Figure 4It is a schematic diagram of the top cover patch of the utility model being attached to the cover plate;

[0040] Figure 5 It is a perspective schematic diagram of the top cover patch and the protective film of the utility model.

[0041] Description of reference numerals:

[0042] 1. Top cover patch; 2. Cover plate; 21. Avoidance area; 22. Pole; 3. Pole group; 4. Shell; 5. Insulation film; 51. Long side covering part; 52. Short side covering part. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 orientation, be constructed and operated in a specific orientation, 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.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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.

[0046] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0048] According to an embodiment of the present utility model, on the one hand, a battery is provided, comprising:

[0049] The housing 4 has an opening formed in at least a portion of the area;

[0050] A cover plate 2, covering the opening of the housing 4;

[0051] The insulating film 5 is coated on the outer peripheral side of the shell 4, and the insulating film 5 at least partially covers the cover plate 2;

[0052] A top cover patch 1 is attached to the cover plate 2, and the top cover patch 1 at least partially overlaps with the insulating film 5;

[0053] The insulating film 5 includes a long side covering portion 51 extending along the long side of the opening and a short side covering portion 52 extending along the short side of the opening;

[0054] The long side covering portion 51 and the short side covering portion 52 are arranged discontinuously, and an escape area 21 is formed between the long side covering portion 51 and the short side covering portion 52;

[0055] The top cover patch 1 is arranged in close contact with the avoidance area 21 .

[0056] In this embodiment, the shell 4 is a square shell structure having four walls. The shell 4 is formed by bending the plate to form a shell structure connected end to end, and high-frequency welding or laser welding is performed at the intersection of the plates to form the shell 4. The shell 4 forms a shell cavity inside, and the shell 4 forms openings at both ends along the X direction to accommodate the pole group 3. The X direction is Figure 1 The X direction shown in .

[0057] The cover plate 2 is disposed on the opening of the housing 4 to form a closed space for accommodating the pole group 3 .

[0058] The housing 4 of this embodiment may be made of metal material, such as aluminum or stainless steel.

[0059] The battery provided by the embodiment of the utility model can ensure the adhesion effect of the insulating film 5 on the cover plate 2 and avoid the warping of the insulating film 5 by making the long side covering part 51 and the short side covering part 52 of the insulating film 5 non-continuously arranged, and forming an avoidance area 21 between the long side covering part 51 and the short side covering part 52, and making the top cover patch 1 fit the avoidance area 21, so as to increase the fitting area of ​​the top cover patch 1 and the cover plate 2 and avoid the warping problem of the top cover patch 1. Improve the overall bonding reliability and positioning accuracy of the insulating film 5 and the shell 4, the top cover patch 1 and the cover plate 2; further improve production efficiency, reduce production costs, and reduce the number of secondary re-fitting after production.

[0060] The positions where the top cover patch 1 is most likely to warp are the four corners of the cover plate 2. Since the avoidance area 21 is located at the four corners of the cover plate 2, by making the top cover patch 1 fit with the avoidance area 21, the fitting effect of the top cover patch 1 can be further increased to avoid the problem of warping of the top cover patch 1.

[0061] Combination Figure 1 As shown, the value ranges of the shell 4 in the X direction, Y direction, and Z direction are: 300mm≤X≤1000mm, 50mm≤Y≤150mm, 12mm≤Z≤25mm respectively; specifically, in this embodiment, the dimensions of the shell 4 satisfy: X is 500mm, Y is 120mm, and Z is 16mm.

[0062] In some embodiments, in combination Figure 3 As shown, the dimension of the long side covering portion 51 covering the cover plate 2 along the direction perpendicular to the long side of the opening is a1, and the dimension of the short side covering portion 52 covering the cover plate 2 along the direction perpendicular to the short side of the opening is a2; wherein a1 satisfies: 2mm≤a1≤5mm, and a2 satisfies: 2mm≤a2≤5mm.

[0063] By limiting the lower size limits of a1 and a2, the insufficient bonding strength between the insulating film 5 and the cover plate 2 can be avoided, and warping can be prevented; and by limiting the upper size limits of a1 and a2, it can be avoided that the long side covering part 51 and the short side covering part 52 are too large to occupy the area where the top cover patch 1 is attached to the cover plate 2, which is beneficial to ensure the firmness of the adhesion of the top cover patch 1, and at the same time can avoid the increase in manufacturing costs caused by the excessive length of the insulating film 5.

[0064] In some embodiments, a1 and a2 satisfy: a1=a2.

[0065] Optionally, the value of the dimension a1 of the long side covering portion 51 covering the cover plate 2 along the direction perpendicular to the long side of the opening may be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm.

[0066] Optionally, the value of the dimension a2 of the short side covering portion 52 covering the cover plate 2 along the direction perpendicular to the short side of the opening may be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm.

[0067] In some embodiments, in combination Figure 4 As shown, along the direction perpendicular to the long side of the opening, the distance between the outer edge of the top cover patch 1 and the edge of the corresponding cover plate 2 is b1; wherein b1 satisfies: b1 = (Nn) / 2;

[0068] Along the direction perpendicular to the short side of the opening, the distance between the outer edge of the top cover patch 1 and the edge of the corresponding cover plate 2 is b2; wherein b2 satisfies: b2 = (Mm) / 2;

[0069] Among them, M and N are the length and width dimensions of the cover plate 2 respectively, and m and n are the length and width dimensions of the top cover patch 1 respectively.

[0070] In some embodiments, b1 and b2 satisfy: 0 mm ≤ b1 = b2 ≤ 2 mm.

[0071] By limiting the upper limits of b1 and b2, the size of the top cover patch 1 can be prevented from being too small, thereby preventing the fitting area between the top cover patch 1 and the long side covering part 51 and the short side covering part 52 from being too small, thereby preventing the top cover patch 1 from warping.

[0072] In some embodiments, in combination Figure 4 As shown, a pole 22 is also provided on the cover plate 2, and an opening is formed at the position of the top cover patch 1 corresponding to the pole 22; the edge of the top cover patch 1 corresponding to the pole 22 is the inner edge of the top cover patch 1;

[0073] Along the direction perpendicular to the long side of the opening, the distance between the outer edge of the pole 22 and the inner edge of the top cover patch 1 is b3, and satisfies: 0mm≤b3≤1mm.

[0074] By limiting the upper limit of b3, the distance between the outer edge of the pole 22 and the inner edge of the top cover patch 1 can be avoided to be too large, the area of ​​the top cover patch 1 attached to the cover plate 2 can be avoided to be reduced, and the insulation performance of the top cover patch 1 to the cover plate 2 can be prevented from decreasing.

[0075] In some embodiments, in combination Figure 4 As shown, along the direction perpendicular to the long side of the opening, the distance between the inner edge and the outer edge of the top cover patch 1 is c, and satisfies: c ≥ 2 mm.

[0076] By limiting the lower limit of c, it is possible to avoid the distance between the inner edge and the outer edge of the top cover patch 1 being too small, thereby preventing the top cover patch 1 from being attached to the cover plate 2 and the folding edge size of the insulating film 5 being small, avoiding the top cover patch 1 from being attached to the insulating film 5 and the cover plate 2 to be reduced in bonding effect, preventing the insulating film 5 and the top cover patch 1 from warping, and reducing the risk of battery insulation failure.

[0077] In some embodiments, in combination Figure 5 As shown, along the direction perpendicular to the long side of the opening, the distance between the inner edge of the long side covering portion 51 and the outer edge of the top cover patch 1 is d1, and satisfies: 75%≤d1 / a1<100%;

[0078] Along the direction perpendicular to the short side of the opening, the distance between the inner edge of the short side covering portion 52 and the outer edge of the top cover patch 1 is d2, and satisfies: 75%≤d2 / a2<100%.

[0079] It should be noted that the inner edge of the long side covering portion 51 may be specifically the edge of the long side covering portion 51 away from the shell 4 ; the inner edge of the short side covering portion 52 may be specifically the edge of the short side covering portion 52 away from the shell 4 .

[0080] By limiting the lower limit of d1 / a1, it is possible to avoid the distance between the edge of the long side covering portion 51 and the outer edge of the top cover patch 1 being too small, thereby preventing the top cover patch 1 and the long side covering portion 51 from being unreliable in bonding, and reducing the risk of insulation failure; and by limiting the upper limit of d1 / a1, it is possible to avoid insufficient bonding area between the top cover patch 1 and the cover plate 2, thereby preventing the top cover patch 1 from being unfirmly bonded, thereby avoiding material waste of the insulating film 5 and reducing costs.

[0081] Similarly, by limiting the lower limit of d2 / a2, it is possible to avoid the distance between the edge of the short side covering portion 52 and the outer edge of the top cover patch 1 being too small, thereby preventing the top cover patch 1 and the short side covering portion 52 from having an unreliable bonding effect, and reducing the risk of insulation failure; and by limiting the upper limit of d2 / a2, it is possible to avoid insufficient bonding area between the top cover patch 1 and the cover plate 2, thereby preventing the top cover patch 1 from having an unreliable bonding, thereby preventing material waste of the insulating film 5 and reducing costs.

[0082] In some embodiments, the area of ​​the overlapping region between the top cover patch 1 and the avoidance area 21 is p, the area of ​​the top cover patch 1 is q, and the following condition is satisfied: 5%≤p / q≤10%.

[0083] By limiting the lower limit of p / q, it is possible to avoid the overlapping area between the top cover patch 1 and the avoidance area 21 being too small, preventing the top cover patch 1 from being loosely adhered, and preventing the top cover patch 1 from warping. By limiting the upper limit of p / q, it is possible to avoid the situation where the bonding area between the insulating film 5 and the cover plate 2 is insufficient, and preventing the insulating film 5 from easily warping.

[0084] In some embodiments, the minimum distance between adjacent long side covering portions 51 and short side covering portions 52 is d3, and satisfies: 2 mm ≤ d3 ≤ 5 mm.

[0085] By limiting the lower limit of the minimum spacing d3 between the adjacent long side covering parts 51 and the short side covering parts 52, the bonding strength can be ensured; and by limiting the upper limit of the minimum spacing d3 between the adjacent long side covering parts 51 and the short side covering parts 52, material waste can be avoided and costs can be reduced.

[0086] According to an embodiment of the present utility model, on the other hand, an electrical device is provided, including: the battery as described above.

[0087] The electrical equipment provided by the embodiment of the utility model can ensure the adhesion effect of the insulating film 5 on the cover plate 2 and avoid the warping of the insulating film 5 by making the long side covering part 51 and the short side covering part 52 of the insulating film 5 non-continuously arranged, and forming an avoidance area 21 between the long side covering part 51 and the short side covering part 52, and making the top cover patch 1 fit the avoidance area 21, so as to increase the fitting area of ​​the top cover patch 1 and the cover plate 2 and avoid the warping problem of the top cover patch 1. Improve the overall bonding reliability and positioning accuracy of the insulating film 5 and the housing 4, and the top cover patch 1 and the cover plate 2; further improve production efficiency, reduce production costs, and reduce the number of secondary re-fitting after production.

[0088] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the present utility model.

Claims

1. A battery, characterized in that: include: The shell has an opening formed in at least a part of the area; A cover plate, covering the opening of the shell; An insulating film, covering the outer peripheral side of the shell, and the insulating film at least partially covers the cover plate; A top cover patch is attached to the cover plate, and the top cover patch at least partially overlaps with the insulating film; The insulating film includes a long side covering portion extending along a long side of the opening and a short side covering portion extending along a short side of the opening; The long side covering portion and the short side covering portion are arranged discontinuously, and an escape zone is formed between the long side covering portion and the short side covering portion; The top cover patch is arranged in contact with the avoidance area.

2. The battery according to claim 1, characterized in that The dimension a1 of the cover plate covered by the long side covering portion in a direction perpendicular to the long side of the opening, and the dimension a2 of the cover plate covered by the short side covering portion in a direction perpendicular to the short side of the opening; wherein a1 satisfies: 2mm≤a1≤5mm, and a2 satisfies: 2mm≤a2≤5mm.

3. The battery according to claim 2, characterized in that a1 and a2 satisfy: a1=a2.

4. The battery according to claim 1, characterized in that Along the direction perpendicular to the long side of the opening, the distance between the outer edge of the top cover patch and the corresponding edge of the cover plate is b1; wherein b1 satisfies: b1 = (Nn) / 2; Along the direction perpendicular to the short side of the opening, the distance between the outer edge of the top cover patch and the corresponding edge of the cover plate is b2; wherein b2 satisfies: b2 = (Mm) / 2; Among them, M and N are the length and width dimensions of the cover plate respectively, and m and n are the length and width dimensions of the top cover patch respectively.

5. The battery according to claim 4, characterized in that b1 and b2 satisfy: 0mm≤b1=b2≤2mm.

6. The battery according to any one of claims 1 to 5, characterized in that: The cover plate is also provided with a pole, and the top cover patch forms an opening at a position corresponding to the pole; the edge of the top cover patch corresponding to the pole is the inner edge of the top cover patch; Along the direction perpendicular to the long side of the opening, the distance between the outer edge of the pole and the inner edge of the top cover patch is b3, and satisfies: 0mm≤b3≤1mm.

7. The battery according to claim 6, characterized in that Along the direction perpendicular to the long side of the opening, the distance between the inner edge and the outer edge of the top cover patch is c, and satisfies: c≥2mm.

8. The battery according to claim 2, characterized in that Along the direction perpendicular to the long side of the opening, the distance between the inner edge of the long side covering portion and the outer edge of the top cover patch is d1, and satisfies: 75%≤d1 / a1<100%; Along the direction perpendicular to the short side of the opening, the distance between the inner edge of the short side covering portion and the outer edge of the top cover patch is d2, and satisfies: 75%≤d2 / a2<100%.

9. The battery according to any one of claims 1 to 5, characterized in that: The minimum distance between adjacent long-side covering parts and adjacent short-side covering parts is d3, and satisfies: 2mm≤d3≤5mm.

10. An electrical device, characterized in that: A battery comprising a battery as claimed in any one of claims 1 to 9.

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