Battery plugging assembly

Abstract

The utility model provides a battery plugging assembly, and relates to the field of battery production equipment. The battery plugging assembly provided by the utility model comprises a cap plate, wherein at least one mounting part is arranged on one surface of the cap plate along the thickness direction; the at least one cap assembly comprises a cap used for blocking the opening of the open battery cell; one end of the connecting piece is connected with the cap, and the other end of the connecting piece is detachably connected to the corresponding mounting part. The battery plugging assembly provided by the utility model can be highly adaptive to temporary plugging after liquid injection of the open battery cell of the cylindrical battery, ensures efficient injection before electrolyte injection and effective sealing after liquid injection when the open liquid injection port design is adopted for the cylindrical battery, and is convenient to disassemble and assemble, so that the production efficiency of the cylindrical battery is remarkably improved.

Description

Technical Field

[0001] This application relates to the field of battery production equipment, and in particular to a battery sealing assembly. Background Technology

[0002] In the production process of cylindrical batteries, electrolyte injection is a key step, which involves injecting electrolyte into the battery casing that houses the battery core to provide the necessary medium for the battery's chemical reactions.

[0003] Cylindrical battery cells typically have a small-hole injection port on the battery casing for electrolyte injection. After electrolyte injection, a sealing pin is needed for temporary sealing to prevent electrolyte evaporation. Once the electrolyte has fully reacted within the battery casing, the sealing pin needs to be removed for the next production step. The small-hole design hinders rapid electrolyte injection, and the inconvenience of removing and installing the sealing pin results in low production efficiency. To address this, existing technologies employ an open-cell design, with an open injection port at the top of the battery casing to improve electrolyte injection efficiency. However, battery casings with open injection ports currently lack a suitable temporary sealing structure for efficient removal and installation, severely limiting the improvement of cylindrical battery production efficiency.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] This application provides a battery sealing assembly, which aims to solve the problem in the prior art that there is a lack of a temporary sealing structure that can be efficiently disassembled and assembled during the liquid injection of open cells in the production process of cylindrical batteries, which seriously restricts the improvement of cylindrical battery production efficiency.

[0006] This application provides a battery sealing assembly, including: a cap plate, on one side of the cap plate along the thickness direction having at least one mounting portion; at least one cap assembly, the cap assembly including: a cap for sealing the opening of an open battery cell; and a connector, one end of the connector being connected to the cap, and the other end being detachably connected to a corresponding mounting portion.

[0007] In some embodiments, the cap includes a connecting portion and a sealing portion; the two ends of the connecting portion along the thickness direction are respectively connected to the connector and the sealing portion; the end of the sealing portion away from the connecting portion is used for interference fit with the opening.

[0008] In some embodiments, the mounting portion includes a first mounting hole opened along the thickness direction, with both ends of the first mounting hole penetrating the cap plate; the connecting portion has a corresponding first mating hole at one end facing the mounting portion; the connecting member passes through the first mounting hole and is threadedly connected to the first mating hole to connect the cap plate and the cap.

[0009] In some embodiments, the first mounting hole includes a first segment and a second segment arranged sequentially along the thickness direction, the inner diameter of the second segment being larger than the inner diameter of the first segment; the connecting portion is housed within the second segment, and the connecting member is housed within the first segment.

[0010] In some embodiments, the mounting portion includes a second mounting hole that extends through the cap plate at one end facing the connecting portion; the connecting portion and the connector are integrally formed, and the connector is received in the second mounting hole and threadedly connected to the inner wall of the second mounting hole.

[0011] In some embodiments, the connecting portion includes a first connecting segment and a second connecting segment; the first connecting segment is connected to a connector along the thickness direction; the two ends of the second connecting segment along the thickness direction are respectively connected to the first connecting segment and the sealing portion; the second connecting segment and the cap plate are spaced apart along the thickness direction to form a gap space.

[0012] In some implementations, the size of the second connecting segment gradually increases in the thickness direction toward the sealing portion.

[0013] In some embodiments, the sealing portion and the cap plate are fitted together in the thickness direction.

[0014] In some implementations, the size of the sealing portion gradually decreases in the thickness direction away from the cap plate.

[0015] In some implementations, the surface of the sealing portion is provided with a flexible outer jacket.

[0016] The battery sealing assembly provided in this application has at least the following beneficial effects:

[0017] Through the structural design of the battery sealing assembly, the battery sealing assembly includes a cap plate and at least one cap component. The cap plate has at least one mounting part on one side along the thickness direction for the corresponding cap component to be disassembled and connected. The cap component includes a connector and a cap. One end of the connector can be detachably connected to the mounting part on the cap plate, and the other end is connected to the cap. The cap is mainly used to seal the opening of the open cell, ensuring a temporary seal of the internal environment of the cell to prevent the electrolyte injected into the cell from evaporating. After the electrolyte has fully reacted inside the cell, the cap can be removed from the open cell for the next production process.

[0018] Therefore, the battery sealing assembly provided in this application can be highly adapted to the temporary sealing of open cylindrical battery cells after electrolyte injection, ensuring efficient injection of electrolyte before electrolyte injection and effective sealing after electrolyte injection when the cylindrical battery adopts an open electrolyte injection port design. Moreover, the battery sealing assembly is easy to install and remove from the open battery cells, which is conducive to the mass production of cylindrical batteries and thus significantly improves the production efficiency of cylindrical batteries.

[0019] Other features and advantages of the battery sealing assembly provided in this application will be further described in subsequent detailed embodiments. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a battery sealing assembly according to one embodiment of this application;

[0022] Figure 2 This is a partial cross-sectional view of a battery sealing assembly provided according to one embodiment of this application;

[0023] Figure 3 This is a partial cross-sectional view of a cap provided according to one embodiment of this application;

[0024] Figure 4 This is a cross-sectional view of the battery sealing assembly provided according to one embodiment of this application;

[0025] Figure 5 This is a cross-sectional view of the battery sealing assembly provided according to one embodiment of this application;

[0026] Figure 6 This is a cross-sectional view of the structure of a battery sealing assembly provided according to one embodiment of this application.

[0027] The attached figures are labeled as follows:

[0028] 100. Cap plate; 110. Mounting part; 110A. First mounting hole; 110B. Second mounting hole;

[0029] 200. Cap assembly;

[0030] 210. Cap; 211. Connecting part; 211A. First mating hole; 2111. First connecting section; 2112. Second connecting section; 212. Sealing part; 2121. Flexible outer sleeve; 2113. Inner liner;

[0031] 220. Connector; R. Spacing. Detailed Implementation

[0032] To make the above and other features and advantages of this application clearer, the application is further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation to those skilled in the art, and are exemplary only, not restrictive.

[0033] In the following description, numerous specific details are set forth to provide a thorough understanding of this application. However, it will be apparent to those skilled in the art that the specific details are not required to practice this application. In other instances, well-known steps or operations have not been described in detail to avoid obscuring this application.

[0034] In the description of this application, it should be understood that the use of terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" to indicate orientation or positional relationship, unless otherwise specified, is understood to be based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and does 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.

[0035] Furthermore, features specified with "first" or "second" for descriptive purposes only should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features specified with "first" or "second" may explicitly or implicitly include at least one of the specified features. The description of "multiple" generally means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction 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.

[0037] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that the 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] It should be noted that the open cell mentioned in this application refers to an assembly of electrodes, separators, and battery casings before electrolyte injection during the production of cylindrical batteries, wherein the top of the battery casing has an opening to allow for rapid electrolyte injection. Furthermore, unless otherwise explicitly specified and limited, the thickness direction mentioned in this application refers to the thickness direction of the cap plate 100.

[0039] As mentioned above, while designing an open opening on the open cell as an electrolyte injection port can improve the electrolyte injection efficiency during the cylindrical battery production process, the lack of a suitable temporary sealing structure for efficient disassembly and assembly limits the production efficiency of cylindrical batteries. Therefore, the general concept of this application is to provide a battery sealing assembly. Through structural design of the battery sealing assembly, it is possible to efficiently disassemble and assemble the battery sealing assembly at the open electrolyte injection port on the open cell, thereby facilitating the mass production of cylindrical batteries and effectively improving battery production efficiency.

[0040] Based on the above concept, and referring to Figures 1-6 As shown, this application embodiment provides a battery sealing assembly, including: a cap plate 100, on one side of the cap plate 100 along the thickness direction, at least one mounting portion 110; at least one cap assembly 200, the cap assembly 200 including: a cap 210 for sealing the opening of an open battery cell; and a connector 220, one end of the connector 220 being connected to the cap 210, and the other end being detachably connected to the corresponding mounting portion 110.

[0041] It should be understood that the mounting portion 110 is provided on one side of the cap plate 100 along the thickness direction. The mounting portion 110 is for mounting the cap assembly 200, which can temporarily seal the opening of the open cell. The number of mounting portions 110 can be designed according to the open cell to be sealed or the cap assembly 200 to be installed in the application scenario. For example, one or several mounting portions 110 can be designed on one side of the cap plate 100 along the thickness direction. Multiple mounting portions 110 can be designed on the cap plate 100 to accommodate multiple cap assemblies 200, which facilitates the batch temporary sealing of open cells, thereby effectively improving the production efficiency of cylindrical batteries.

[0042] In this embodiment, the cap assembly 200 is adapted to the corresponding mounting part 110. When the cap plate 100 is designed to have multiple mounting parts 110 on one side along the thickness direction, the cap assembly 200 can also be designed to have a corresponding number of mounting parts 110. The specific structure of each mounting part 110 can be the same or different. The cap assembly 200 corresponding to each mounting part 110 can also be the same or different, as long as it can be ensured that each mounting part 110 can match the corresponding cap assembly 200.

[0043] In this embodiment, the mounting part 110 is preferably disposed on the bottom surface of the cap plate 100 along the thickness direction. The cap 210 can be connected to the mounting part 110 through the connector 220 and is located at the bottom of the cap plate 100 so that when sealing the open battery cell, the opening of the open battery cell can face the bottom of the cap plate 100 to avoid electrolyte leakage.

[0044] In this embodiment, the connector 220 and the cap 210 can be integrally formed, and the connector 220 can also be threaded onto the cap 210. The connector 220 and the mounting part 110 can be connected by a detachable connection method such as screw connection or snap connection, so as to facilitate the quick replacement of the cap assembly 200 and improve the flexibility and versatility of the battery sealing assembly.

[0045] The detailed structure of the battery sealing assembly is described below based on specific embodiments.

[0046] refer to Figure 1-3 As shown, in some embodiments of this application, the cap 210 includes a connecting portion 211 and a sealing portion 212; the two ends of the connecting portion 211 along the thickness direction are respectively connected to the connector 220 and the sealing portion 212; the end of the sealing portion 212 away from the connecting portion 211 is used for interference fit with the opening.

[0047] The cap 210 is designed with a connecting part 211 connected to the top of the sealing part 212. The connecting part 211 is cylindrical in shape. The top of the connecting part 211 is connected to the connector 220 and is detachably connected to the mounting part 110 through the connector 220. The sealing part 212 is designed according to the open shape. The bottom end of the sealing part 212 is used to press-fit with the open liquid injection port of the open battery cell to facilitate the temporary sealing of the open battery cell and its removal from the cap assembly 200.

[0048] The sealing part 212 can be made of a flexible material, such as rubber, or only the outer surface can be made of flexible material to facilitate interference fit with the opening.

[0049] In some embodiments, in order to ensure the structural strength of the cap 210 while enabling the sealing part 212 to have an interference fit with the opening, the surface of the sealing part 212 is provided with a flexible outer sleeve 2121.

[0050] like Figure 3 As shown, the cap 210 is composed of an inner liner 2113 and a flexible outer sleeve 2121 fitted on the outer surface of the inner liner 2113; the top of the inner liner 2113 protrudes from the flexible outer sleeve 2121 to form a connecting part 211, and the remaining part of the surface is fitted with the flexible outer sleeve 2121 to form a sealing part 212 with the flexible outer sleeve 2121 on the surface; the inner liner 2113 can be made of rigid materials such as aluminum to achieve an interference fit between the sealing part 212 and the opening while improving the structural strength of the cap 210.

[0051] To improve the sealing performance and ease of disassembly of the sealing part 212, such as Figure 2 and Figure 3 As shown, in the thickness direction, the size of the sealing part 212 gradually decreases in the direction away from the cap plate 100.

[0052] This ensures that the sealing part 212 fits tightly against the electrolyte filling port of the battery casing, preventing electrolyte evaporation or leakage. It also makes the sealing part 212 easier to remove, as the gradually decreasing size of the part can be more easily removed from the opening without getting stuck. In addition, the size of the opening filling port of different open cells may be slightly different. The size of the sealing part 212 gradually decreases in the direction away from the cap plate 100, which can better adapt to openings of different sizes and improve the versatility of the sealing part 212.

[0053] It should be noted that the dimensional change of the sealing part 212 can be linear or non-linear, depending on the shape and size of the opening.

[0054] To achieve a detachable connection of the cap assembly 200 mounting section 110, refer to Figure 2 , Figure 3 and Figure 6As shown, in some embodiments of this application, the mounting part 110 includes a first mounting hole 110A opened along the thickness direction, and both ends of the first mounting hole 110A penetrate the cap plate 100; the connecting part 211 is provided with a corresponding first mating hole 211A at one end facing the mounting part 110; the connecting member 220 passes through the first mounting hole 110A and is threadedly connected to the first mating hole 211A to connect the cap plate 100 and the cap 210.

[0055] In other words, in this embodiment, the first mounting hole 110A is a through hole that penetrates the cap plate 100 along the thickness direction. The top of the connecting part 211 facing the first mounting hole 110A is provided with a corresponding first mating hole 211A. The first mating hole 211A can be a blind hole or a countersunk hole. The connecting part 220 passes through the first mounting hole 110A and is threadedly connected to the first mating hole 211A, so as to detachably connect the cap plate 100 and the cap 210 respectively, so as to facilitate the flexible disassembly and assembly of the cap plate 100 and the cap 210. When facing different open battery cells, the cap 210 of the corresponding size can be quickly replaced, thereby improving the versatility of the battery sealing assembly.

[0056] It should be understood that in the embodiments of this application, the connecting portion 211 may be entirely located within the first mounting hole 110A, or only the top portion may be located within the first mounting hole 110A. For example... Figure 6 As shown, in some embodiments of this application, the first mounting hole 110A includes a first segment and a second segment arranged sequentially along the thickness direction. The first segment is located at the top of the second segment, and the inner diameter of the second segment is larger than the inner diameter of the first segment. The connecting portion 211 is received in the second segment, and the connecting member 220 is received in the first segment.

[0057] By accommodating the connecting part 211 in the first mounting hole 110A, the connection stability between the cap 200 and the cap plate 100 can be further improved, which is conducive to the mass sealing of open battery cells.

[0058] It should be clarified that the connecting member 220 in the embodiments of this application has an external thread on its radial surface. The connecting member 220 can be integrally formed with the connecting part 211, or the connecting member 220 and the connecting part 211 can be designed separately. When the connecting member 220 and the connecting part 211 are designed separately, the connecting member 220 can specifically be a screw.

[0059] refer to Figure 4 and Figure 5 As shown in some embodiments of this application, when the connecting part 211 and the connector 220 are integrally formed, the mounting part 110 includes a second mounting hole 110B, and the second mounting hole 110B passes through the cap plate 100 at one end facing the connecting part 211; the connector 220 is received in the second mounting hole 110B and is threadedly connected to the inner wall of the second mounting hole 110B.

[0060] The second mounting hole 110B is a blind hole or a countersunk hole, meaning that the end of the second mounting hole 110B away from the connecting part 211 does not penetrate the cap plate 100. The top of the connecting part 211 is connected to the connector 220, which is housed in the second mounting hole 110B and threaded to the inner wall of the second mounting hole 110B. This design can reduce the number of parts and reduce the material loss of the cap plate 100, so that when designing a large number of second mounting holes 110B, high structural strength can still be maintained, thus improving the stability of the production process.

[0061] Because battery sealing components are prone to electrolyte contamination during use, cleaning them is a necessary step. After cleaning, to facilitate reuse, there should be no water residue. For further information, please refer to [reference needed]. Figure 5 As shown in some embodiments of this application, the connecting portion 211 includes a first connecting segment 2111 and a second connecting segment 2112; the first connecting segment 2111 is connected to the connector 220 along the thickness direction; the two ends of the second connecting segment 2112 along the thickness direction are respectively connected to the first connecting segment 2111 and the sealing portion 212; the second connecting segment 2112 and the cap plate 100 are spaced apart along the thickness direction to form a space R.

[0062] The first connecting segment 2111 is connected to the connector 220 at the top and to the second connecting segment 2112 at the bottom. The two ends of the second connecting segment 2112 along the thickness direction are connected to the first connecting segment 2111 and the sealing part 212, respectively. Thus, the space R formed by the second connecting segment 2112 and the cap plate 100 along the thickness direction can be supplied with hot air during the drying process of the battery sealing assembly, so that the water remaining on the cap 210 can be dried quickly, so that the battery sealing assembly can be reused.

[0063] To reduce the amount of water remaining after cleaning the cap 210, refer to Figure 5 As shown, in some embodiments of this application, the size of the second connecting segment 2112 gradually increases in the thickness direction toward the sealing portion 212.

[0064] The size of the second connecting section 2112 gradually increases in the direction toward the sealing part 212, thereby forming an inclined surface at the top of the sealing part 212. After the cap 210 is cleaned, the cleaning water can flow downward along the inclined surface, thereby reducing the amount of water to be treated during the drying process, which is conducive to the rapid drying of the cap 210 and further improves the production efficiency of cylindrical batteries.

[0065] refer to Figure 6 As shown, in order to avoid water accumulation between the cap 210 and the cap plate 100 after cleaning, in some embodiments of this application, the sealing part 212 and the cap plate 100 are fitted together in the thickness direction.

[0066] In this embodiment, the connecting part 211 is located inside the first mounting hole 110A, and the sealing part 212 is attached to the cap plate 100 in the thickness direction, so that there is no residual water between the cap 210 and the cap plate 100 after cleaning, further reducing the amount of water to be treated during the drying process, and ensuring that the battery sealing assembly can be dried quickly and efficiently.

[0067] In summary, the battery sealing assembly provided in this application embodiment can be highly adapted to the temporary sealing of open cylindrical battery cells after electrolyte injection, ensuring efficient injection of electrolyte before electrolyte injection and effective sealing after electrolyte injection when the cylindrical battery adopts an open electrolyte injection port design. Moreover, the battery sealing assembly is easy to install and remove from the open battery cells, which is conducive to the mass production of cylindrical batteries and thus significantly improves battery production efficiency.

[0068] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery sealing assembly, characterized in that, include: A cap plate (100) having at least one mounting portion (110) on one side along its thickness direction; At least one cap assembly (200), the cap assembly (200) comprising: Cap (210), used to seal the opening of an open battery cell; as well as A connector (220) is provided, one end of which is connected to the cap (210), and the other end is used for detachable connection to the corresponding mounting part (110).

2. The battery sealing assembly according to claim 1, characterized in that, The cap (210) includes a connecting part (211) and a sealing part (212); The connecting part (211) is connected to the connecting member (220) and the sealing part (212) at both ends along the thickness direction, respectively; The end of the sealing part (212) away from the connecting part (211) is used for interference fit with the opening.

3. The battery sealing assembly according to claim 2, characterized in that, The mounting part (110) includes a first mounting hole (110A) opened along the thickness direction, and both ends of the first mounting hole (110A) penetrate the cap plate (100); The connecting part (211) is provided with a corresponding first mating hole (211A) at one end facing the mounting part (110); The connector (220) passes through the first mounting hole (110A) and is threadedly connected to the first mating hole (211A) to connect the cap plate (100) and the cap (210).

4. The battery sealing assembly according to claim 3, characterized in that, The first mounting hole (110A) includes a first segment and a second segment arranged sequentially along the thickness direction, the inner diameter of the second segment being larger than the inner diameter of the first segment; the connecting part (211) is received in the second segment, and the connecting member (220) is received in the first segment.

5. The battery sealing assembly according to claim 2, characterized in that, The mounting part (110) includes a second mounting hole (110B), which extends through the cap plate (100) at one end facing the connecting part (211); The connecting part (211) is integrally formed with the connecting member (220), and the connecting member (220) is received in the second mounting hole (110B) and threadedly connected to the inner wall of the second mounting hole (110B).

6. The battery sealing assembly according to claim 3 or 4, characterized in that, The connecting part (211) includes a first connecting segment (2111) and a second connecting segment (2112); The first connecting segment (2111) is connected to the connector (220) along the thickness direction; The second connecting segment (2112) is connected to the first connecting segment (2111) and the sealing part (212) at both ends along the thickness direction, respectively; The second connecting segment (2112) and the cap plate (100) are spaced apart along the thickness direction to form a gap space (R).

7. The battery sealing assembly according to claim 6, characterized in that, In the thickness direction, the size of the second connecting segment (2112) gradually increases in the direction toward the sealing portion (212).

8. The battery sealing assembly according to claim 3 or 4, characterized in that, The sealing part (212) and the cap plate (100) are fitted together in the thickness direction.

9. The battery sealing assembly according to any one of claims 2 to 4, characterized in that, In the thickness direction, the size of the sealing part (212) gradually decreases in the direction away from the cap plate (100).

10. The battery sealing assembly according to any one of claims 2 to 4, characterized in that, The surface of the sealing part (212) is provided with a flexible outer jacket (2121).

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