Battery plugging assembly

Abstract

The utility model provides a battery plugging assembly, and relates to the field of battery production equipment. The utility model provides a battery plugging assembly. The battery plugging assembly comprises a cap plate; one end of the cap is detachably connected to one surface of the cap plate in the thickness direction, and the other end of the cap is used for blocking the opening of the open battery cell. 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, so that efficient injection before electrolyte injection and effective sealing after liquid injection are realized, and the battery plugging assembly 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, comprising: a cap plate; and at least one cap, one end of which is detachably connected to one side of the cap plate in the thickness direction, and the other end of which is used to seal the opening of an open battery cell.

[0007] In some embodiments, the cap plate has at least one mounting groove on one side along the thickness direction for detachably connecting the cap.

[0008] In some embodiments, the cap includes a flexible outer jacket and an inner liner; the flexible outer jacket is fitted over the inner liner; the inner liner at least partially protrudes from one end of the flexible outer jacket along its thickness direction and is received within a mounting groove; wherein one end of the flexible outer jacket is capable of interference fit with the mounting groove, and the other end is used for interference fit with the open end of the open battery cell.

[0009] In some embodiments, the mounting groove includes a first mounting cavity and a second mounting cavity connected along the thickness direction, the inner diameter of the first mounting cavity being larger than the inner diameter of the second mounting cavity; the liner is received in the second mounting cavity, and a portion of the flexible outer sleeve is received in the first mounting cavity and can be interference-fitted with the inner wall of the first mounting cavity.

[0010] In some embodiments, the flexible outer jacket includes a mating portion and a sealing portion; the mating portion and the sealing portion are connected and together form a receiving cavity; one end of the inner liner is received in the receiving cavity and the other end protrudes out of the receiving cavity; the size of the mating portion gradually increases in the direction of the sealing portion, and the mating portion is at least partially received in a first mounting cavity and is interference-fitted with the inner wall of the first mounting cavity.

[0011] In some embodiments, a mounting hole is also provided in the mounting groove along the thickness direction; the mounting hole passes through the cap plate and communicates with the second mounting cavity; a threaded hole is provided at the end of the liner away from the flexible outer sleeve, so that the screw can pass through the mounting hole and be screwed into the threaded hole.

[0012] In some embodiments, the inner wall of the mounting groove is provided with internal threads, and the outer wall of one end of the cap is provided with external threads to mate with the internal threads of the mounting groove.

[0013] In some embodiments, the battery sealing assembly further includes a ring block; the ring block forms a third mounting cavity, one end of the cap is received in the third mounting cavity, and the other end protrudes from the ring block through the third mounting cavity in the thickness direction; the ring block is received in a mounting groove and is detachably connected to the mounting groove.

[0014] In some embodiments, the inner wall of the mounting groove is provided with internal threads; the ring block includes a ring block body and a limiting part; the ring block body forms a third mounting cavity, and the outer wall of the ring block body is provided with external threads to engage with the internal threads on the inner wall of the mounting groove; the limiting part is located at one end of the ring block body, and the limiting part has multiple plunger holes in its circumferential direction, the plunger holes extending into the third mounting cavity and communicating with the third mounting cavity so that the plunger can be placed and interfere with the cap after placement.

[0015] In some embodiments, at least one water passage groove is provided on the other side of the cap plate along the thickness direction, and the water passage groove is aligned with the mounting groove along the thickness direction; a water passage notch is provided at the bottom of the water passage groove, penetrating the cap plate, and the bottom surface of the water passage groove is inclined toward the water passage notch.

[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. One end of the cap is detachably connected to one side of the cap plate in the thickness direction, and the other end is used to seal the opening of the open cell. One or more caps can be installed and removed from the cap plate. One end of the cap is installed on one side of the cap plate in the thickness direction, and the other end can temporarily seal the opening on the open cell to ensure the temporary sealing of the internal environment of the cell and 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 to proceed to 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 and an open battery cell according to one embodiment of this application;

[0022] Figure 2 This is a partial cross-sectional view of a cap plate 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 an enlarged view of a partial structure R of a 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 6This is a partial structural schematic diagram of a battery sealing assembly according to one embodiment of this application;

[0027] Figure 7 This is a schematic diagram of the structure of the cap and ring block according to one embodiment of this application;

[0028] Figure 8 This is a schematic diagram of the structure of a ring block according to one embodiment of this application;

[0029] Figure 9 This is a schematic diagram of the structure of a battery sealing assembly according to one embodiment of this application;

[0030] Figure 10 This is a top view of a battery sealing assembly provided according to one embodiment of this application.

[0031] The attached figures are labeled as follows:

[0032] 10. Battery sealing assembly;

[0033] 100. Cap plate; 110. Mounting groove; 111. First mounting cavity; 112. Second mounting cavity; 113. Mounting hole; 120. Water passage groove; 121. Water passage notch;

[0034] 200. Cap; 210. Flexible outer jacket; 211. Mating part; 212. Sealing part; 220. Liner; 221. Threaded hole;

[0035] 300, Ring block; 301, Third mounting cavity; 310, Ring block body; 320, Limiting part; 321, Piston hole; A, Receiving cavity; R, Local structure;

[0036] 20. Open-face battery cells. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] It should be noted that the open-cell 20 mentioned in this application refers to an assembly of electrodes, separators, and battery casings before electrolyte injection during the cylindrical battery manufacturing process, 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.

[0044] As mentioned above, while designing an open opening on the open cell 20 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. In response, the general concept of this application is to provide a battery sealing assembly 10. Through the structural design of the battery sealing assembly 10, it is possible to efficiently disassemble and assemble the battery sealing assembly 10 on the open electrolyte injection port of the open cell, thereby facilitating the mass production of cylindrical batteries and effectively improving battery production efficiency.

[0045] Based on the above concept, and referring to Figures 1-10 As shown, this application provides a battery sealing assembly 10, including: a cap plate 100; and at least one cap 200, one end of the cap 200 being detachably connected to one side of the cap plate 100 in the thickness direction, and the other end being used to seal the opening of the open battery cell 20.

[0046] It is understood that in this embodiment, the battery sealing assembly 10 mainly consists of a cap plate 100 and at least one cap 200 that can be detached from one side of the cap plate 100 in the thickness direction; the top end of the cap 200 is detachably connected to the cap plate 100, and the bottom end is used to seal the open liquid injection port designed on the top of the open cell 20. With this design, the cap 200 can be flexibly detached from the cap plate 100, and can temporarily seal the opening on the top of the open cell 20, thereby effectively improving the production efficiency of cylindrical batteries.

[0047] refer to Figure 1 As shown, the cap 200 can be installed at the bottom of the cap plate 100, allowing the open cell 20 sealed at the bottom of the cap 200 to stand vertically, preventing electrolyte leakage from the open injection port, and allowing the electrolyte to fully react before proceeding to the next step. In this embodiment, the cap 200 can be detachably connected to one side of the cap plate 100 in the thickness direction by means of screws or snaps, facilitating the maintenance and replacement of the cap 200. For different models of open cells 20, a matching cap 200 can be replaced, effectively improving the flexibility and versatility of the battery sealing assembly 10.

[0048] To achieve the positioning and installation of the cap 200, refer to Figure 1 and Figure 2As shown, in some embodiments, the cap plate 100 has at least one mounting groove 110 on one side along the thickness direction for detachably connecting the cap 200.

[0049] The mounting slot 110 can be designed on the bottom surface of the cap plate 100 to facilitate the installation and removal of the cap 200 from the bottom of the cap plate 100 via the mounting slot 110. The shape of the mounting slot 110 can be designed according to the installation requirements of the top of the cap 200. For example, when the top of the cap 200 is cylindrical, the mounting slot 110 can be a cylindrical slot adapted to the top of the cap 200, so that the top of the cap 200 can be received and installed in the mounting slot 110. In addition, the mounting slot 110 and the top of the cap 200 can be connected by a screw or snap-fit ​​connection, which facilitates disassembly, so as to facilitate the installation and removal of the cap 200.

[0050] To improve the sealing performance and ease of assembly / disassembly of the cap 200 when sealing open injection ports, some embodiments refer to Figure 3 and Figure 5 As shown, the cap 200 includes a flexible outer jacket 210 and an inner liner 220; the flexible outer jacket 210 is fitted onto the inner liner 220; the inner liner 220 at least partially protrudes from one end of the flexible outer jacket 210 along the thickness direction and is received within the mounting groove 110; wherein, one end of the flexible outer jacket 210 is capable of interference fit with the mounting groove 110, and the other end is used for interference fit with the open end of the open cell 20.

[0051] like Figure 5 As shown, the flexible jacket 210 is fitted onto one end of the bottom of the inner liner 220, and the top of the inner liner 220 protrudes and is exposed above the top of the flexible jacket 210 and is housed within the mounting groove 110. The bottom of the flexible jacket 210 can be interference-fitted with the open end of the open cell 20 to effectively improve the sealing performance when the open cell is sealed. Moreover, the cap 200 can be directly pulled out from the open cell 20 during disassembly, which is extremely convenient. Furthermore, the top part of the flexible jacket 210 is inserted into the mounting groove 110 along with the inner liner 220, and this part of the flexible jacket 210 can be interference-fitted with the mounting groove 110, thereby making the disassembly and assembly of the cap 200 and the cap plate 100 more convenient, further improving the flexibility and versatility of the battery sealing assembly.

[0052] Furthermore, in the prior art, after the cap 200 seals the open cell 20, it will inevitably be contaminated with electrolyte. Therefore, cleaning the battery sealing assembly 10 becomes a necessary step. After cleaning the battery sealing assembly 10, in order to facilitate the reuse of the battery sealing assembly 10, there should be no water residue. By interfering with one end of the flexible jacket 210 and the mounting groove 110, cleaning water can be prevented from entering between the mounting groove 110 and the cap 200, thereby reducing the amount of water to be treated during the cleaning process of the battery sealing assembly 10 and further improving battery production efficiency.

[0053] In this embodiment, the flexible outer jacket 210 can be made of elastic materials such as plastic, which has a certain degree of deformability, so as to allow for interference fit with the mounting groove 110 and the open battery cell 20 respectively, so that the flexible outer jacket 210 is tightly connected to the mounting groove 110 and the open battery cell 20; the inner liner 220 can be made of rigid materials such as aluminum, which is beneficial to effectively improve the overall strength of the cap 200.

[0054] refer to Figures 1 to 5 As shown, in some embodiments, the mounting groove 110 includes a first mounting cavity 111 and a second mounting cavity 112 connected along the thickness direction. The inner diameter of the first mounting cavity 111 is larger than the inner diameter of the second mounting cavity 112. The inner liner 220 is received in the second mounting cavity 112, and a portion of the flexible outer sleeve 210 is received in the first mounting cavity 111 and can be interference-fitted with the inner wall of the first mounting cavity 111.

[0055] Thus, the first mounting cavity 111 is located at the bottom of the second mounting cavity 112, and the inner diameter of the first mounting cavity 111 is larger than the inner diameter of the second mounting cavity 112, so that the mounting groove 110 has a stepped structure at the end facing the cap 200. The portion of the inner liner 220 exposed to the flexible outer sleeve 210 is completely contained within the second mounting cavity 112, while the top portion of the flexible outer sleeve 210 is as follows: Figure 4 As shown in the enlarged view of the partial structure R, it can be tightly pressed against the inner wall of the first mounting cavity 111, so that the cap 200 is installed on the cap plate 100. The cleaning water cannot enter the gap between the cap 200 and the mounting groove 110, avoiding water residue after cleaning, so as to further improve the battery production efficiency.

[0056] refer to Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, the flexible outer jacket 210 includes a mating portion 211 and a sealing portion 212; the mating portion 211 is connected to the sealing portion 212 and together forms a receiving cavity A; one end of the inner liner 220 is received in the receiving cavity A and the other end protrudes out of the receiving cavity A; the size of the mating portion 211 gradually increases toward the sealing portion 212, and the mating portion 211 is at least partially received in the first mounting cavity 111 and is press-fitted with the inner wall of the first mounting cavity 111.

[0057] The mating part 211 is located on the top of the flexible outer jacket 210, and its bottom is connected to the integrally formed sealing part 212, which together with the sealing part 212 forms the receiving cavity A. The top of the mating part 211 is designed with an opening. The bottom of the inner liner 220 is received in the receiving cavity A, and its top protrudes into the receiving cavity A through the opening on the mating part 211, so as to achieve a stable connection between the inner liner 220 and the flexible outer jacket 210.

[0058] Furthermore, the dimensions of the mating part 211 gradually increase towards the sealing part 212 to form an inclined surface. When the cap 200 is connected to the mounting groove 110, the top of the mating part 211 is inserted into the first mounting cavity 111. Under the squeezing action, the inclined surface formed by the mating part 211 is squeezed and deformed by the stepped structure formed by the first mounting cavity 111 to tightly cover the outer edge of the first mounting cavity 111 away from the second mounting cavity 112, and to make an interference fit with the inner wall of the first mounting cavity 111, thereby preventing cleaning water from entering the first mounting cavity 111 and preventing water accumulation. In addition, the inclined surface formed on the mating part 211 faces the downward direction to facilitate the flow of cleaning water and prevent cleaning water from remaining on the mating part 211, thereby further improving the cleaning efficiency of the battery sealing assembly 10 and effectively improving the battery production efficiency.

[0059] In some embodiments, reference is made to Figure 3 As shown, the size of the sealing part 212 gradually decreases in the direction away from the cap plate 100 to better adapt to openings of different sizes and improve the versatility of the sealing part 212.

[0060] To improve the connection stability between the cap 200 and the cap plate 100, refer to Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, the mounting groove 110 is further provided with a mounting hole 113 along the thickness direction; the mounting hole 113 passes through the cap plate 100 and is connected to the second mounting cavity 112; the end of the inner liner 220 away from the flexible outer sleeve 210 is provided with a threaded hole 221 so that the screw can pass through the mounting hole 113 and be screwed into the threaded hole 221.

[0061] The bottom wall of the second mounting cavity 112 protrudes towards the top of the cap plate 100. The protruding part is provided with a mounting hole 113. The top of the inner liner 220 is provided with a threaded hole 221, which is opposite to the mounting hole 113. When the cap 200 is connected to the cap plate 100, the inner liner 220 is placed in the second mounting cavity 112, and the screw is screwed into the threaded hole 221 through the mounting hole 113 along the top of the cap plate 100, thereby achieving a stable connection between the cap 200 and the cap plate 100.

[0062] To ensure a stable connection between the cap 200 and the cap plate 100 while improving assembly and disassembly efficiency, in some embodiments, the inner wall of the mounting groove 110 is provided with an internal thread, and the outer wall of one end of the cap 200 is provided with an external thread to engage with the internal thread of the mounting groove 110.

[0063] For example, the side wall of the second mounting cavity 112 of the mounting groove 110 can be provided with internal threads, and the side wall of the top of the liner 220 can be designed with external threads. Thus, the cap 200 can be directly screwed into the mounting groove 110 to achieve connection, thereby ensuring a stable connection between the cap 200 and the cap plate 100 without the need for additional parts such as screws, thus improving the efficiency of disassembly and assembly.

[0064] refer to Figures 6 to 8 As shown, in some embodiments, the battery sealing assembly 10 further includes a ring block 300; the ring block 300 forms a third mounting cavity 301, one end of the cap 200 is received in the third mounting cavity 301, and the other end protrudes from the ring block 300 through the third mounting cavity 301 in the thickness direction; the ring block 300 is received in the mounting groove 110 and is detachably connected to the mounting groove 110.

[0065] In this embodiment, the cap 200 is connected to the cap plate 100 via the ring block 300. The top shape of the cap 200 is adapted to the shape of the third mounting cavity 301 of the ring block 300. The bottom of the cap 200 gradually decreases in size in the direction away from the cap plate 100. When the cap 200 is installed, the top part of the cap 200 is placed in the third mounting cavity 301 formed by the ring block 300 and is press-fitted with the ring block 300. The bottom part of the cap 200 protrudes from the ring block 300 through the third mounting cavity 301 along the thickness direction. The ring block 300 carries the cap 200 and is received in the mounting groove 110. The mounting groove 110 is connected by a detachable connection method such as snap-fit ​​or screw-fit, thereby realizing the installation and fixation of the cap 200 on the cap plate 100.

[0066] refer to Figure 7 and Figure 8 As shown, in some embodiments, the inner wall of the mounting groove 110 is provided with internal threads; the ring block 300 includes a ring block body 310 and a limiting part 320; the ring block body 310 forms a third mounting cavity 301, and the outer wall of the ring block body 310 is provided with external threads to engage with the internal threads on the inner wall of the mounting groove 110; the limiting part 320 is provided at one end of the ring block body 310, and a plurality of plunger holes 321 are opened in the circumferential direction of the limiting part 320, the plunger holes 321 extend into the third mounting cavity 301 and communicate with the third mounting cavity 301 so that the plunger can be placed and pressurized to fit the cap 200.

[0067] It is understood that the inner wall of the mounting groove 110 is provided with internal threads, and the outer wall of the ring block body 310 is provided with external threads, so that the ring block body 310 can be screwed into the mounting groove 110; the limiting part 320 is provided at the end of the ring block body 310 away from the mounting groove 110, and the limiting part 320 is also annular, but its inner diameter is smaller than the inner diameter of the third mounting cavity 301, and the limiting part 320 has a plurality of plunger holes 321 (e.g.) in the circumferential direction. Figure 8The four plunger holes 321 shown extend into and communicate with the third mounting cavity 301. When the cap 200 is connected to the ring block 300, one end of the cap 200 used to seal the opening protrudes from the ring block 300 through the limiting part 320 in the third mounting cavity 301, while the other end of the cap 200 is located in the third mounting cavity 301. By placing plungers into each plunger hole 321, the sidewalls of the plungers can press the side of the cap 200 in the third mounting cavity 301 to achieve an interference fit between each plunger and the cap 200, thereby achieving the fastening of the cap 200 in the third mounting cavity 301 and promoting a stable connection between the cap 200 and the ring block 300.

[0068] To further reduce water residue after cleaning the battery sealing assembly 10, refer to Figure 2 , Figure 9 and Figure 10 As shown, in some embodiments, at least one water passage groove 120 is provided on the other side of the cap plate 100 along the thickness direction, and the water passage groove 120 is aligned with the mounting groove 110 along the thickness direction; the bottom of the water passage groove 120 is provided with a water passage notch 121 that penetrates the cap plate 100, and the bottom surface of the water passage groove 120 is inclined toward the water passage notch 121.

[0069] It should be clarified that the cap plate 100 has two opposing surfaces along its thickness direction. One surface, serving as the bottom surface, is provided with one or more mounting grooves 110. The other surface, serving as the top surface, is provided with a water passage groove 120 along its thickness direction corresponding to the mounting grooves 110. The bottom wall of the water passage groove 120 is sloped, and a water passage notch 121 extending through to the bottom surface of the cap plate 100 is provided at the lowest point of the slope. Thus, after the cap plate 100 is cleaned, the residual cleaning water on the top surface of the cap plate 100 flows into the water passage groove 120, flows through the sloped bottom surface of the water passage groove 120 to the water passage notch 121, and flows out from the bottom of the cap plate 100 through the water passage notch 121. This further reduces the residual water after cleaning the battery sealing assembly 10, improves the cleaning efficiency of the battery sealing assembly 10, and promotes further improvement in battery production efficiency.

[0070] In summary, the battery sealing assembly 10 provided in this application embodiment can be highly adapted to the temporary sealing of the open cylindrical battery cell 20 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 10 is easy to install and remove from the open battery cell 20, which is conducive to the mass production of cylindrical batteries and thus significantly improves the production efficiency of cylindrical batteries.

[0071] 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 (10), characterized in that, include: Cap plate (100); and, At least one cap (200), one end of which is detachably connected to one side of the cap plate (100) in the thickness direction, and the other end is used to seal the opening of the open cell (20).

2. The battery sealing assembly (10) according to claim 1, characterized in that, The cap plate (100) has at least one mounting groove (110) on one side along the thickness direction for detachably connecting the cap (200).

3. The battery sealing assembly (10) according to claim 2, characterized in that, The cap (200) includes a flexible outer shell (210) and an inner lining (220); The flexible outer jacket (210) is fitted onto the inner lining (220); The inner lining (220) at least partially protrudes from one end of the flexible outer jacket (210) along the thickness direction and is received within the mounting groove (110); One end of the flexible jacket (210) can be interference-fitted with the mounting groove (110), and the other end is used for interference-fitting with the open battery cell (20).

4. The battery sealing assembly (10) according to claim 3, characterized in that, The mounting groove (110) includes a first mounting cavity (111) and a second mounting cavity (112) connected along the thickness direction, wherein the inner diameter of the first mounting cavity (111) is larger than the inner diameter of the second mounting cavity (112); The inner liner (220) is housed in the second mounting cavity (112), and a portion of the flexible outer sleeve (210) is housed in the first mounting cavity (111) and is capable of interference fit with the inner wall of the first mounting cavity (111).

5. The battery sealing assembly (10) according to claim 4, characterized in that, The flexible outer jacket (210) includes a mating part (211) and a sealing part (212); The mating part (211) is connected to the sealing part (212) and together they form a receiving cavity (A); One end of the liner (220) is received within the receiving cavity (A), and the other end protrudes from the receiving cavity (A); The size of the mating part (211) gradually increases in the direction of the sealing part (212), and the mating part (211) is at least partially housed in the first mounting cavity (111) and has an interference fit with the inner wall of the first mounting cavity (111).

6. The battery sealing assembly (10) according to claim 4, characterized in that, The mounting groove (110) is further provided with mounting holes (113) along the thickness direction; The mounting hole (113) penetrates the cap plate (100) and communicates with the second mounting cavity (112); The inner liner (220) has a threaded hole (221) at the end away from the flexible outer sleeve (210) so that a screw can be screwed into the threaded hole (221) after passing through the mounting hole (113).

7. The battery sealing assembly (10) according to claim 2, characterized in that, The inner wall of the mounting groove (110) is provided with an internal thread, and the outer wall of one end of the cap (200) is provided with an external thread to engage with the internal thread of the mounting groove (110).

8. The battery sealing assembly (10) according to claim 2 further includes a ring block (300); The ring block (300) forms a third mounting cavity (301), one end of the cap (200) is received in the third mounting cavity (301), and the other end protrudes from the ring block (300) through the third mounting cavity (301) along the thickness direction; The ring block (300) is housed in the mounting groove (110) and is detachably connected to the mounting groove (110).

9. The battery sealing assembly (10) according to claim 8, wherein the inner wall of the mounting groove (110) is provided with an internal thread; the ring block (300) includes a ring block body (310) and a limiting part (320); The ring block body (310) forms the third mounting cavity (301), and the outer wall of the ring block body (310) is provided with an external thread to engage with the internal thread on the inner wall of the mounting groove (110). The limiting part (320) is disposed at one end of the ring block body (310). The limiting part (320) has a plurality of plunger holes (321) in the circumferential direction. The plunger holes (321) extend into the third mounting cavity (301) and communicate with the third mounting cavity (301) so that the plunger can be placed and pressurized to fit the cap (200).

10. The battery sealing assembly (10) according to any one of claims 2 to 9, wherein at least one water passage groove (120) is provided on the other side of the cap plate (100) along the thickness direction, and the water passage groove (120) is aligned with the mounting groove (110) along the thickness direction; The bottom of the water passage trough (120) is provided with a water passage opening (121) that penetrates the cap plate (100), and the bottom surface of the water passage trough (120) is inclined toward the water passage opening (121).

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