A single cell and a battery pack

Abstract

The embodiment of the present application provides a single battery and a battery pack, the single battery comprising: a shell and a cover plate, the cover plate being connected to an open end of the shell; a first protective film attached to the cover plate; and a second protective film attached to the shell; wherein part of the cover plate is not attached to the first protective film and forms a first exposed area, part of the shell is not attached to the second protective film and forms a second exposed area, and the first exposed area and the second exposed area are used for coating an adhesive. In the embodiment of the present application, the adhesive can be coated on the first exposed area and the second exposed area, so that the pressing strip can be directly bonded to the first exposed area of the cover plate through the adhesive, the connection strength of the pressing strip and the single battery is improved, meanwhile, the box can be directly bonded to the second exposed area of the shell through the adhesive, so that the connection strength of the pressing strip, the box and the single battery is improved, thereby ensuring the structural strength and stability of the battery pack.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a single cell battery and a battery pack. Background Technology

[0002] The battery pack housing typically contains multiple individual cells stacked inside. In practical applications, after multiple individual cells are grouped together, structural adhesive needs to be applied to the outer surface of the individual cells and pressure strips need to be installed to strengthen the connection between the multiple individual cells. Structural adhesive is also applied to the sides of the individual cells and then fixed to the battery pack housing to improve the stability of the battery pack.

[0003] In related technologies, the casing of a single battery cell has protective structures such as top patches and insulating films on its top and side surfaces. These protective structures ensure the insulation of the single battery cell while effectively preventing damage to the casing surface during transportation and use. However, in practical applications, structural adhesive needs to be applied to these protective structures first. Because the connection strength between the protective structure and the battery cell casing is limited, it is difficult to guarantee the connection strength between the battery cell casing and the pressure strip or housing, thus affecting the structural strength and stability of the battery pack. Utility Model Content

[0004] This application aims to provide a single-cell battery and a battery pack to at least solve the problem of insufficient connection strength between the casing of the single-cell battery and the pressure strip and the housing.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a single-cell battery having a first direction, a second direction, and a third direction that are perpendicular to each other, wherein the single-cell battery comprises:

[0007] A housing and a cover plate, the housing having an open end, the cover plate being connected to the housing and covering the open end;

[0008] A first protective film is attached to the cover plate, and the first protective film has a first opening;

[0009] And a second protective film, which is attached to the housing, and the second protective film has a third opening;

[0010] The cover plate is positioned opposite the first opening to form a first exposed area, and the housing is positioned opposite the third opening to form a second exposed area. The first exposed area and the second exposed area are used for applying adhesive.

[0011] Optionally, the cover plate includes a sheet and an electrode post, the electrode post passing through the sheet, the first protective film being attached to the sheet, the electrode post passing through a portion of the first opening, and the cover plate forming the first exposed area in another portion of the first opening.

[0012] Optionally, the first protective film includes two short sides, which are disposed opposite to each other along the second direction;

[0013] The short side is spaced apart from the first opening along the second direction.

[0014] Optionally, the first protective film includes a main body and an extension, the extension extending outward from the main body along the second direction, the main body and the extension forming the first opening;

[0015] The second protective film includes a first bend, which is bent from the housing toward the cover plate in the second direction, and the first exposed area is formed between the pole, the extension and the first bend.

[0016] Optionally, the extension covers at least a portion of the first bend.

[0017] Optionally, the cover plate includes a sheet and an electrode post, the electrode post passing through the sheet, the first protective film being attached to the sheet, the first protective film also having a second opening, the first opening and the second opening being spaced apart, the electrode post passing through the second opening and exposed outside the first protective film, and the cover plate forming the first exposed area at the first opening.

[0018] Optionally, the first protective film further includes two short sides and two long sides, the two short sides being disposed opposite each other along the second direction, and the two long sides being disposed opposite each other along the first direction;

[0019] The first protective film further includes a second bending portion, which is disposed at at least one of the long sides and / or at least one of the short sides. The second bending portion bends toward the housing along the third direction and overlaps with at least a portion of the second protective film.

[0020] Optionally, the first exposed area is connected to the second exposed area.

[0021] Optionally, the housing includes two large surfaces and two side surfaces, the two large surfaces are arranged opposite each other along the first direction, the two side surfaces are arranged opposite each other along the second direction, and the two large surfaces and the two side surfaces are connected to each other;

[0022] At least one of the sides is provided with the third opening.

[0023] Secondly, this application also discloses a battery pack, including a housing, a retaining strip, and a plurality of individual batteries as described above;

[0024] The housing has a receiving cavity in which multiple individual batteries are disposed. The cover of each individual battery has a first exposed area, and the casing of each individual battery has a second exposed area.

[0025] The first exposed area is connected to the pressure strip by the adhesive, and the second exposed area is connected to the housing by the adhesive.

[0026] In this embodiment, the first protective film is attached to the cover plate of the single battery cell, and the second protective film is attached to the casing of the single battery cell. Since the first protective film is not attached to a portion of the cover plate to form a first exposed area, and the second protective film is not attached to a portion of the casing to form a second exposed area, adhesive can be applied to the first and second exposed areas. This allows the pressure strip to be directly bonded to the first exposed area of ​​the cover plate through the adhesive, improving the connection strength between the pressure strip and the single battery cell. At the same time, the casing can be directly bonded to the second exposed area of ​​the casing through the adhesive. This improves the connection strength between the pressure strip and the casing and the single battery cell, thereby ensuring the structural strength and stability of the battery pack.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is an exploded schematic diagram of a single cell battery according to an embodiment of this application;

[0030] Figure 2 This is a top view of a single-cell battery according to the first embodiment of this application;

[0031] Figure 3 This is a top view of a single cell battery according to the second embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the structure of the first protective film in a single-cell battery according to the third embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the structure of the first protective film in a single-cell battery according to the fourth embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the structure of the first protective film in a single-cell battery according to the fifth embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the structure of a single cell battery according to the fifth embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the structure of the first protective film in a single-cell battery according to the sixth embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the structure of a single cell battery according to the sixth embodiment of this application.

[0038] Reference numerals: 10 - cover plate, 101 - first exposed area, 11 - pole post, 12 - sheet body, 13 - explosion-proof valve, 20 - housing, 201 - second exposed area, 21 - side, 22 - large surface, 30 - first protective membrane, 301 - main body, 302 - extension, 31 - first opening, 32 - short side, 33 - long side, 34 - second bend, 35 - second opening, 36 - fourth opening, 40 - second protective membrane, 41 - first bend, 42 - third opening, X - first direction, Y - second direction, Z - third direction. Detailed Implementation

[0039] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0041] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] The battery pack housing typically contains multiple individual cells stacked inside. In practical applications, after multiple individual cells are grouped together, structural adhesive needs to be applied to the outer surface of the individual cells and pressure strips need to be installed to strengthen the connection between the multiple individual cells. Structural adhesive is also applied to the sides of the individual cells and then fixed to the battery pack housing to improve the stability of the battery pack.

[0044] In related technologies, the casing of a single battery cell has protective structures such as top patches and insulating films on its top and side surfaces. These protective structures ensure the insulation of the single battery cell while effectively preventing damage to the casing surface during transportation and use. However, in practical applications, structural adhesive needs to be applied to these protective structures first. Because the connection strength between the protective structure and the battery cell casing is limited, it is difficult to guarantee the connection strength between the battery cell casing and the pressure strip or housing, thus affecting the structural strength and stability of the battery pack.

[0045] Based on the above problems, this application provides a single-cell battery, such as... Figure 1As shown, the single-cell battery provided in this application embodiment has a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other. The single-cell battery includes: a housing 20 and a cover plate 10. The housing 20 has an open end, and the cover plate 10 is connected to the open end of the housing 20; a first protective film 30 is attached to the cover plate 10 and has a first opening 31; and a second protective film 40 is attached to the housing 20 and has a third opening 42. A portion of the cover plate 10 is disposed opposite to the first opening 31 and forms a first exposed area 101, and a portion of the housing 20 is disposed opposite to the third opening 42 and forms a second exposed area 201. The first exposed area 101 and the second exposed area 201 are used to coat an adhesive.

[0046] In this embodiment, the first protective film 30 is attached to the cover plate 10 of the single battery cell, and the second protective film 40 is attached to the casing 20 of the single battery cell. Since the first protective film 30 is not attached to a portion of the cover plate 10 to form a first exposed area 101, and the second protective film 40 is not attached to a portion of the casing 20 to form a second exposed area 201, adhesive can be applied to the first exposed area 101 and the second exposed area 201. This allows the pressure strip to be directly bonded to the first exposed area 101 of the cover plate 10 through adhesive, thereby improving the connection strength between the pressure strip and the single battery cell. At the same time, the casing can be directly bonded to the second exposed area 201 of the casing 20 through adhesive. In this way, the connection strength between the pressure strip and the casing and the single battery cell is improved, thereby ensuring the structural strength and stability of the battery pack.

[0047] Specifically, the casing 20 serves as the main frame of the individual battery, providing mechanical strength and preventing damage to the internal cells from external impacts or vibrations. The cover plate 10 seals the opening of the casing 20, and integrates the cell terminals 11 to connect the individual battery to the external circuit. The casing 20 and the cover plate 10 are tightly connected by welding, snap-fitting, or other methods, forming a closed, stable, and safe internal environment to prevent moisture and dust intrusion and effectively prevent electrolyte leakage, ensuring the safety of the individual battery during charging and discharging. A first protective film 30 covers the cover plate 10, and a second protective film 40 wraps around the casing 20. Both the first and second protective films are insulating films, protecting the individual batteries from mechanical damage during transportation and packaging, while also providing insulation to prevent short circuits caused by vibration or compression.

[0048] In specific applications, openings can be made in the first protective film 30 and the second protective film 40 so that the first protective film 30 does not completely cover the cover plate 10 and the second protective film 40 does not completely cover the housing 20, thereby forming a first exposed area 101 and a second exposed area 201 on the cover plate 10 and the housing 20, respectively, for applying adhesive. The adhesive can be a structural adhesive such as epoxy resin or polyurethane structural adhesive. For example, during the assembly of individual cells, adhesive can be applied to the first exposed area 101 for bonding with the pressure strip. Multiple individual cells are connected to each other through a pressure strip, thereby improving the connection strength between multiple individual cells. During the battery pack installation process, adhesive can be applied to the second exposed area 201 for bonding with the battery pack housing. Understandably, compared to the indirect connection between the cover plate 10 and the pressure strip, where the first protective film 30 covers the cover plate 10 and then the cover plate 10 is directly connected to the pressure strip via adhesive, the direct connection between the cover plate 10 and the pressure strip via adhesive is tighter and can improve the connection effect between the individual battery and the pressure strip. Similarly, compared to the indirect connection between the housing 20 and the box body, where the second protective film 40 wraps the housing 20 and then the housing is connected to the box body via adhesive, the direct connection between the housing 20 of the individual battery and the box body via adhesive can improve the connection effect between the individual battery and the box body.

[0049] In some embodiments, the first exposed area 101 and the second exposed area 201 are connected, which simplifies the adhesive application process and reduces manufacturing costs.

[0050] like Figure 1 As shown, the cover plate 10 includes a sheet body 12 and an electrode post 11. The electrode post 11 passes through the sheet body 12, and the first protective film 30 is attached to the sheet body 12, as shown. Figures 2 to 5 As shown, the first protective film 30 has a first opening 31, through which a pole 11 passes a portion of the first opening 31, and the cover plate 10 forms a first exposed area 101 in the other part of the first opening 31. There are two poles 11, with one pole 11 passing through one first opening 31. In this structure, since there are two poles 11, only two first openings 31 need to be made on the first protective film 30. Each pole 11 passes through a portion of one first opening 31, forming a first exposed area 101 in the other part of each opening 31. That is, two first exposed areas 101 are formed on the cover plate 10, allowing for the application of adhesive from both sides and the connection of the pressure strip. This simplifies the structure of the first protective film 30, streamlines its processing, and reduces the accuracy requirements for positioning between the first opening 31 and the pole 11, thus lowering the processing difficulty. The cover plate 10 also integrates an explosion-proof valve 13, and the first protective membrane 30 is also provided with a fourth opening 36. The fourth opening 36 is used to avoid the explosion-proof valve 13 so that the gas inside the single cell can be discharged through the explosion-proof valve 13.

[0051] like Figure 2 As shown, the first protective membrane 30 includes two short sides 32, which are arranged opposite each other along the second direction Y; the short sides 32 and the first opening 31 are spaced apart along the second direction Y. It should be noted that the spaced-apart arrangement of the short sides 32 and the first opening 31 means that there is a certain gap between the side of the first opening 31 closest to the short side 32 and the short side 32, that is, the first opening 31 is located between the two short sides 32 and does not penetrate through the short sides 32. This results in better circumferential integrity of the first protective membrane 30, improving its structural strength and deformation resistance.

[0052] like Figure 3 As shown, the first protective film 30 includes a main body 301 and an extension 302. The extension 302 extends outward from the main body 301 along the second direction Y, and forms a short side 32 of the first protective film 30 on the side away from the main body 301 along the second direction Y. The main body 301 and the extension 302 enclose to form a first opening 31. The second protective film 40 includes a first bending portion 41. The first bending portion 41 bends from the housing 20 toward the cover plate 10 along the second direction Y. When the pole post 11 passes through a part of the first opening 31, a first exposed area 101 is formed between the pole post 11, the extension 302 and the first bending portion 41.

[0053] exist Figure 3 In the first protective film 30 shown, the main body 301 covers the area of ​​the cover plate 10 between the two pole posts 11. On one side of the main body 301 along the second direction Y, there are two extensions 302. The two extensions 302 are spaced apart along the first direction X and are located on both sides of the pole post 11. The two extensions 302 extend along the second direction Y to the edge of the cover plate 10. The main body 301 and the two extensions 302 enclose to form a first opening 31, and the end of the first opening 31 away from the main body 301 is an open structure. When the first bending portion 41 of the second protective film 40 bends towards the cover plate 10 along the second direction Y, the first bending portion 41 covers part of the edge of the cover plate 10, the pole post 11 passes through a part of the first opening 31, one side of the pole post 11 is close to the main body 301, and a first exposed area 101 is formed on the other side of the pole post 11, between the two extensions 302 and the first bending portion 41. In specific applications, the second protective film 40 can be wrapped around the outside of the housing 20 first, and the first bent portion 41 of the second protective film 40 can be bent toward the cover plate 10 to cover the edge of the cover plate 10. Then, the first protective film 30 can be attached to the cover plate 10, and the extension portion 302 can cover part of the first bent portion 41. Alternatively, the first protective film 30 can be attached to the cover plate 10 first, and then the second protective film 40 can be wrapped around the housing 20 and the second bent portion 34 can be bent toward the cover plate 10, so that the edge of the cover plate 10 is covered by the second bent portion 34.

[0054] It should be noted that the first opening 31 penetrates the short side 32 of the first protective film 30, saving material for the first protective film 30. Under this structure, the edge of the cover plate 10 is covered by the first bending part 41, and the gap between the cover plate 10 and the housing 20 can also be covered by the first bending part 41, ensuring the protective effect of the first protective film 30 and the second protective film 40 on the internal structure of the housing 20.

[0055] like Figure 3 As shown, the extension 302 covers at least a portion of the first bend 41. In this case, the first protective film 30 can be directly attached to the cover plate 10, and the extension 302 can cover a portion of the first bend 41. It is understood that since the first bend 41 is formed by bending the second protective film 40 along the third direction Z of the cover plate 10, its size is small. By covering at least a portion of the first bend 41 with the extension 302, the first bend 41 can be pressed down in the third direction Z, effectively reducing the probability of the first bend 41 lifting.

[0056] Optionally, the cover plate 10 includes a sheet body 12 and an electrode post 11. The electrode post 11 passes through the sheet body 12, and a first protective film 30 is attached to the sheet body 12. The first protective film 30 has a first opening 31 and a second opening 35 spaced apart. The electrode post 11 passes through the second opening 35 and is exposed outside the first protective film 30. The cover plate 10 forms a first exposed area 101 at the first opening 31.

[0057] In this embodiment, by providing a first opening 31 and a second opening 35 on the first protective film 30, with the electrode post 11 passing through the second opening 35 and forming a first exposed area 101 at the first opening 31, the adhesive can be applied more accurately to the first exposed area 101. The portion of the first protective film 30 between the first opening 31 and the second opening 35 can effectively isolate the two, greatly reducing the risk of contact between the electrode post 11 and the adhesive applied to the first exposed area 101, and avoiding the probability that the adhesive adhering to the electrode post 11 may cause some adverse consequences to the electrode post 11.

[0058] The design includes two second openings 35 spaced apart along the second direction Y, two terminal posts 11 passing through one second opening 35, and two first openings 31 located on the side of one second opening 35 away from the other. With this design, the two first openings 31 are located outside the second openings 35, thus the first exposed area 101 is located outside the terminal post 11. When the first exposed area 101 is coated with adhesive and connected with a pressure strip, adjacent individual cells can share a single pressure strip, simplifying the installation process. Simultaneously, by pressing adjacent individual cells together with the same pressure strip, the rigid connection between adjacent individual cells is strengthened, reducing relative displacement or vibration between individual cells and ensuring the overall stability of the battery pack.

[0059] like Figure 1 , Figure 7 , Figure 9 As shown, the second protective film 40 has a third opening 42, and the housing 20 forms a second exposed area 201 at the third opening 42. In specific applications, the third opening 42 can be pre-set to accurately determine the position of the second exposed area 201 on the housing 20. Directly forming the second exposed area 201 by setting the third opening 42 is simpler and can be formed during the production of the second protective film 40 through conventional processes such as cutting. The shape and size of the third opening 42 can be flexibly determined according to the size of the individual battery and the adhesion performance of the surface of the housing 20. For example, in the embodiment of this application, the third opening 42 is opened on the side 21 of the housing 20 so that multiple individual batteries can be stacked by contacting each other through the large surface 22.

[0060] Optionally, the first protective film 30 includes two short sides 32 and two long sides 33, the two short sides 32 being arranged opposite each other along the second direction Y, and the two long sides 33 being arranged opposite each other along the first direction X; as shown Figures 4 to 6 and Figure 8 As shown, the first protective film 30 also includes a second bend 34, which is disposed at at least one long side 33 and / or at least one short side 32, such as... Figure 7 , Figure 9 As shown, the second bend 34 bends toward the housing 20 along the third direction Z and overlaps with at least a portion of the second protective film 40.

[0061] In this embodiment, by providing a second bend 34 at at least one long side 33 and / or at least one short side 32 of the first protective film 30, during the installation of the first protective film 30, the second protective film 40 or the second bend 34 can be pressed by at least partially overlapping the second protective film 40 with the second bend 34. For example, when the second bend 34 covers at least part of the second protective film 40, the second protective film 40 can be pressed by the second bend 34 to ensure a tight connection between it and the housing 20. When the second protective film 40 covers at least part of the second bend 34, the first protective film 30 is pressed by the second protective film 40, thereby improving the connection effect between the first protective film 30 and the cover plate 10.

[0062] Optionally, the housing 20 includes two large surfaces 22 and two side surfaces 21. The two large surfaces 22 are arranged opposite each other along a first direction X, and the two side surfaces 21 are arranged opposite each other along a second direction Y. The two large surfaces 22 and the two side surfaces 21 are interconnected, so that the housing 20 forms a top and a bottom that are opposite to each other along a third direction Z; Figure 1 As shown, at least one side 21 is provided with a third opening 42.

[0063] In this embodiment, by providing a third opening 42 on at least one side 21, the second exposed area 201 is formed on the side 21 of the housing 20. When multiple individual battery arrays are arranged, multiple individual batteries can be stacked by contacting each other through the large surface 22. This avoids the problem of the second exposed area 201 being blocked due to the stacking of multiple individual batteries. When multiple individual batteries are stacked by contacting each other through the large surface 22, the mutual support between individual batteries is better, which helps to enhance the overall rigidity of the battery pack, thereby improving the vibration resistance and impact resistance. In addition, this arrangement method can also improve the space utilization of the battery pack.

[0064] It should be noted that the single battery in this embodiment is a cuboid structure. The single battery has a top surface and a bottom surface that are arranged opposite each other along its height direction. The cover plate 10 is connected to the housing 20 and forms the top surface of the single battery. The housing 20 serves as the external protective structure for the single battery. Its large surface 22 and side surface 21 form the four side surfaces 21 of the single battery, and its bottom surface forms the bottom surface of the single battery. Among the four side surfaces 21, there are two large surfaces 22 and two side surfaces 21. The area of ​​the large surface 22 is larger than the area of ​​the side surface 21. In specific applications, multiple single batteries can be arranged along the first direction X to improve the space utilization of the battery pack housing. This arrangement is also more stable. In this case, the large surfaces 22 of the housings 20 of adjacent single batteries are in contact with each other. Therefore, when the second exposed area 201 is set on the side surface 21, the second exposed area 201 of the side surface 21 of each single battery in a row can be exposed and used for coating adhesive.

[0065] In summary, the single-cell battery provided in this application embodiment may include at least the following advantages:

[0066] In this embodiment, the first protective film 30 is attached to the cover plate 10 of the single battery cell, and the second protective film 40 is attached to the casing 20 of the single battery cell. Since the first protective film 30 is not attached to a portion of the cover plate 10 to form a first exposed area 101, and the second protective film 40 is not attached to a portion of the casing 20 to form a second exposed area 201, adhesive can be applied to the first exposed area 101 and the second exposed area 201. This allows the pressure strip to be directly bonded to the first exposed area 101 of the cover plate 10 through adhesive, thereby improving the connection strength between the pressure strip and the single battery cell. At the same time, the casing can be directly bonded to the second exposed area 201 of the casing 20 through adhesive. In this way, the connection strength between the pressure strip and the casing and the single battery cell is improved, thereby ensuring the structural strength and stability of the battery pack.

[0067] This application embodiment also provides a battery pack, including a housing, a pressure strip, and a plurality of individual batteries as described above; the housing has a receiving cavity, in which the plurality of individual batteries are disposed, the cover plate 10 of the individual battery forms a first exposed area 101, and the casing 20 of the individual battery forms a second exposed area 201; wherein, the first exposed area 101 is connected to the pressure strip by an adhesive, and the second exposed area 201 is connected to the housing by an adhesive.

[0068] It should be noted that in the embodiments of this application, the structure of the single cell is the same as that of the single cell in any of the above embodiments, and its beneficial effects are similar, so they will not be described in detail here.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A single-cell battery, characterized in that, The single cell comprises three perpendicular directions: a first direction (X), a second direction (Y), and a third direction (Z). A housing (20) and a cover plate (10), the housing (20) having an open end, and the cover plate (10) being connected to the housing (20) and covering the open end; A first protective film (30) is attached to the cover plate (10), and the first protective film (30) has a first opening (31); And a second protective film (40) is attached to the housing (20), the second protective film (40) having a third opening (42); The cover plate (10) is positioned opposite to the first opening (31) to form a first exposed area (101), and the housing (20) is positioned opposite to the third opening (42) to form a second exposed area (201). The first exposed area (101) and the second exposed area (201) are used to apply adhesive.

2. The single-cell battery according to claim 1, characterized in that, The cover plate (10) includes a sheet (12) and a pole (11), the pole (11) passing through the sheet (12), the first protective film (30) being attached to the sheet (12), the pole (11) passing through a portion of the first opening (31), and the cover plate (10) forming the first exposed area (101) in another portion of the first opening (31).

3. The single-cell battery according to claim 2, characterized in that, The first protective film (30) includes two short sides (32), which are disposed opposite to each other along the second direction (Y); The short side (32) and the first opening (31) are spaced apart along the second direction (Y).

4. The single-cell battery according to claim 2, characterized in that, The first protective film (30) includes a main body (301) and an extension (302). The extension (302) extends outward from the main body (301) along the second direction (Y). The main body (301) and the extension (302) together form the first opening (31). The second protective film (40) includes a first bend (41), which is bent from the housing (20) toward the cover plate (10) in the second direction (Y), and the first exposed area (101) is formed between the pole post (11), the extension (302) and the first bend (41).

5. The single-cell battery according to claim 4, characterized in that, The extension (302) covers at least a portion of the first bend (41).

6. The single-cell battery according to claim 1, characterized in that, The cover plate (10) includes a sheet (12) and a pole (11). The pole (11) passes through the sheet (12). The first protective film (30) is attached to the sheet (12). The first protective film (30) also has a second opening (35). The first opening (31) and the second opening (35) are spaced apart. The pole (11) passes through the second opening (35) and is exposed outside the first protective film (30). The cover plate (10) forms the first exposed area (101) at the first opening (31).

7. The single-cell battery according to any one of claims 1 to 6, characterized in that, The first protective film (30) includes two short sides (32) and two long sides (33), the two short sides (32) are arranged opposite each other along the second direction (Y), and the two long sides (33) are arranged opposite each other along the first direction (X); The first protective film (30) further includes a second bending portion (34), which is disposed at at least one of the long sides (33) and / or at least one of the short sides (32), and the second bending portion (34) bends toward the housing (20) along the third direction (Z) and overlaps with at least a portion of the second protective film (40).

8. The single-cell battery according to any one of claims 1 to 6, characterized in that, The first exposed area (101) and the second exposed area (201) are connected.

9. The single-cell battery according to claim 1, characterized in that, The housing (20) includes two large surfaces (22) and two side surfaces (21). The two large surfaces (22) are arranged opposite each other along the first direction (X), and the two side surfaces (21) are arranged opposite each other along the second direction (Y). The two large surfaces (22) and the two side surfaces (21) are connected to each other. At least one of the sides (21) is provided with the third opening (42).

10. A battery pack, characterized in that, Includes a housing, a pressure strip, and multiple individual battery cells as described in any one of claims 1 to 9; The housing has a receiving cavity, in which a plurality of individual batteries are disposed. The cover plate (10) of the individual battery forms a first exposed area (101), and the casing (20) of the individual battery forms a second exposed area (201). The first exposed area (101) is connected to the pressure strip by the adhesive, and the second exposed area (201) is connected to the box body by the adhesive.

Images