Battery cell cover plate structure and battery cell

Abstract

The utility model discloses a kind of electric core cover plate structure and electric core, belong to electric core structure design technical field. Including: substrate, pressing plate, pole and stop frame structure, substrate separates electric core cover plate into the electric core external area of substrate upper surface and the electric core internal area of substrate lower surface;Pressing plate is set in electric core external area, stop structure is set in electric core internal area, pole penetrates electric core internal area and external area, the upper end of pole is detachably connected with pressing plate, lower end is detachably connected with lower stop frame limiting structure.The utility model is fixed by upper stop frame and lower stop frame clamping, plus the detachable connection of pressing plate and pole, double anti-loose structure is formed, effectively prevent pole loosening in the use process of electric core.And pressing plate, pole, upper stop frame, lower stop frame and the like component are assembled by screw thread connection, clamping and the like mode, it is easy to operate, can improve production efficiency, it is convenient for large-scale industrial production.

Description

Technical Field

[0001] This utility model belongs to the field of battery cell structure design technology, and specifically relates to a battery cell cover structure and a battery cell. Background Technology

[0002] In recent years, with the global emphasis on green energy and sustainable development, the new energy vehicle industry has developed rapidly, with its market share increasing year by year. As a core component of new energy vehicles, the demand for power batteries has also increased significantly, especially for battery cells, a key component of batteries, whose production scale has continued to expand. However, with the increase in the use of battery cells, the number of scrapped battery cells is also increasing. How to efficiently and environmentally dispose of scrapped battery cells has become an urgent problem for the industry to solve.

[0003] Currently, battery cell structures are typically designed as integrated or non-removable units, with the cell cover and casing often fixed by welding or adhesive. While this design meets the cell's sealing and structural strength requirements, it makes it difficult to separate and recycle structural components (such as the cover and casing) after the cell is scrapped. Most scrapped cells can only be processed through crushing and melting, leading to a significant waste of metal and plastic resources and potentially causing secondary pollution if improperly handled. Furthermore, the non-removable nature of traditional cell covers increases the complexity and cost of recycling processes, limiting the recyclability of cell structural components.

[0004] While some research has been conducted on detachable battery cell structures in existing technologies, most focuses on the overall disassembly of the battery cell module. Effective solutions for the detachable design of key components such as the internal cover plate of the battery cell are still lacking. Therefore, there is an urgent need for a novel battery cell cover plate structure that enables rapid and non-destructive disassembly, thereby improving the recyclability of battery cell structural components and reducing resource waste and environmental pollution. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a battery cell cover with a detachable structure. By optimizing the connection method between the cover and the housing, it can be easily separated after the battery cell is scrapped, thereby facilitating the recycling and reuse of battery cell structural components. The specific technical solution is as follows:

[0006] A cell cover structure, comprising:

[0007] The substrate divides the cover plate into an external area and an internal area of ​​the battery cell;

[0008] Pressure plates are located on the outer area of ​​the battery cell;

[0009] A stop structure is provided in the internal area of ​​the battery cell. The stop structure includes a lower stop frame, and a lower stop frame limiting structure is provided on the lower stop frame.

[0010] The terminal post penetrates both the internal and external areas of the battery cell. Its upper end is detachably connected to the pressure plate, and its lower end is detachably connected to the lower stop bracket limiting structure. This detachable connection between the pressure plate and the terminal post effectively prevents the terminal post from loosening during battery cell use, ensuring the stability of the battery cell's electrical connections and avoiding problems such as poor contact and increased resistance caused by loose terminal posts, thereby improving the overall reliability and lifespan of the battery cell.

[0011] Furthermore, an insulating plate is disposed between the substrate and the pressure plate;

[0012] The pressure plate is fixed on the insulating plate, and the pressure plate has a threaded hole with an internal thread. The insulating plate also has a second positioning hole.

[0013] Furthermore, the substrate is provided with a substrate limiting groove, an explosion-proof valve mounting structure, and a liquid injection hole;

[0014] The substrate has a first positioning hole in its limiting groove. The limiting groove on the substrate precisely limits the position of the insulating plate. Simultaneously, the corresponding positioning holes and connecting piece mounting holes on the substrate, insulating plate, and upper stop frame ensure precise alignment and fixation during electrode installation, guaranteeing accurate installation of each component and preventing installation deviations from affecting cell performance, thus ensuring product quality consistency and stability. The detachable connection of each component facilitates replacement and repair during production and maintenance, enhancing product versatility and adaptability. Specifically, the substrate is formed in one piece using a stamping process, eliminating the need for complex machining processes and reducing production difficulty and cost. Components such as the pressure plate, electrode, and stop frame are assembled using threaded connections and snap-fit ​​methods, simplifying operation, improving production efficiency, and facilitating large-scale industrial production.

[0015] Furthermore, the internal region of the battery cell is provided with an upper stop frame, a sealing ring, a connecting piece, an electrode post, and a lower stop frame in sequence from the lower surface of the substrate downwards;

[0016] A third positioning hole is provided on the upper stop frame;

[0017] The connecting piece has mounting holes. It is secured by an upper and lower stop bracket, and the pressure plate is detachably connected to the electrode post, forming a double anti-loosening structure that effectively prevents the electrode post from loosening during cell use. By setting a sealing ring inside the cell, the internal and external environments are effectively isolated, preventing electrolyte leakage and the intrusion of external moisture and impurities. This maintains a stable internal chemical environment, improves cell safety and reliability, and meets the sealing requirements of different application scenarios.

[0018] Furthermore, the first positioning hole, the second positioning hole, the third positioning hole, and the connecting piece mounting hole are configured to install the pole post between the lower stop bracket and the pressure plate.

[0019] Furthermore, a flange face is provided at one end of the pole, and a pole tightening hole is provided on the flange face. The pole tightening hole cooperates with the lower stop bracket limiting structure.

[0020] The outer circumferential surface of the pole is provided with an external thread, which mates with the internal thread of the pressure plate.

[0021] Furthermore, the upper stop and the lower stop are fixed together by a snap-fit ​​connection.

[0022] Furthermore, an explosion-proof valve is installed on the explosion-proof valve mounting structure.

[0023] Furthermore, the cell cover structure also includes a sealing sheet and a sealing pin. The sealing sheet is fixed in the groove of the injection hole, and the sealing pin is used to seal the injection hole.

[0024] On the other hand, this utility model proposes a battery cell, including the aforementioned detachable battery cell cover structure.

[0025] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This invention provides a schematic diagram of the overall structure of the battery cell cover plate.

[0028] Figure 2 A schematic diagram of the substrate structure in this utility model is shown;

[0029] Figure 3 An exploded view of the battery cell cover structure in this utility model is shown;

[0030] Figure 4 A schematic diagram of the pressure plate of this utility model is shown;

[0031] Figure 5 A schematic diagram of the lower stop frame in this utility model is shown;

[0032] Figure 6A schematic diagram of the connecting piece in this utility model is shown;

[0033] Figure 7 A schematic diagram of the pole post structure in this utility model is shown;

[0034] In the diagram, 1. Pressure plate; 2. Insulating plate; 3. Base plate; 4. Sealing ring; 5. Connecting piece; 6. Pole post; 7. Lower stop frame; 8. Explosion-proof valve; 9. Upper stop frame; 10. Sealing piece; 11. Sealing nail; 12. Internal thread of pressure plate; 13. Limiting groove of base plate; 14. Mounting hole of connecting piece; 15. Tightening hole of pole post; 16. External thread of pole post; 17. Limiting structure of lower stop frame; 18. First positioning hole; 19. Second positioning hole; 20. Third positioning hole; 21. Injection hole; 22. Explosion-proof valve mounting structure. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] Since the positive and negative electrode structures of the cell cover plate are the same, this utility model takes the positive electrode part as an example to explain the specific composition structure of the cell cover plate. Figure 1 and Figure 2 As shown, the cell cover structure includes a base plate 3, a pressure plate 1, an electrode post 6, and a stop frame structure. The base plate 3 divides the cell cover into an external area of ​​the cell on the upper surface of the base plate 3 and an internal area of ​​the cell on the lower surface of the base plate 3. The pressure plate 1 is disposed in the external area of ​​the cell, and the stop structure is disposed in the internal area of ​​the cell. The electrode post 6 penetrates through the internal area and the external area of ​​the cell. The upper end of the electrode post 6 is detachably connected to the pressure plate 1, and the lower end is detachably connected to the lower stop frame limiting structure 17.

[0037] like Figure 2As shown, the upper surface of the substrate 3 is provided with a substrate limiting groove 13, an explosion-proof valve mounting structure 22, and an injection hole 21. A first positioning hole 18 is provided in the substrate limiting groove 13. The explosion-proof valve mounting structure 22 is used to install the explosion-proof valve 8, and the injection hole 21 is used to inject electrolyte into the battery cell. In an exemplary embodiment of this utility model, the substrate 3 is manufactured using a stamping process, and the entire substrate 3 requires no other processing. The explosion-proof valve 8 can be fixed to the explosion-proof valve mounting structure 22 by welding. In one embodiment of this utility model, the substrate 3 is a rectangle with chamfered corners. Two substrate limiting grooves 13 are provided, located at both ends of the substrate 3 near the edge, respectively. The explosion-proof valve mounting structure 22 and the injection hole 21 are provided between the two substrate limiting grooves 13.

[0038] The substrate 3 is also provided with a sealing sheet 10 and a sealing pin 11. The sealing sheet 10 is fixed in the groove of the injection hole 21, and the sealing pin 11 is used to seal the injection hole 21. For example, the sealing pin 11 can be made of rubber.

[0039] like Figure 3 As shown, an insulating plate 2 and a pressure plate 1 are sequentially arranged from the top of the substrate limiting groove 13 on the outer region of the battery cell. The substrate limiting groove 13 is used to limit the insulating plate 2, which is disposed in the substrate limiting groove 13, and the pressure plate 1 is fixed inside the insulating plate 2. A second positioning hole 19 is formed on the insulating plate 2, which is correspondingly arranged with the first positioning hole 18 to jointly realize the positioning of the electrode post 6.

[0040] like Figure 4 As shown, the pressure plate 1 has a threaded hole in the middle, and the threaded hole has an internal thread 12, which matches the external thread 16 of the pole post 6 to lock the pole post 6. This utility model does not impose specific limitations on the shape of the pressure plate 1, as long as it cooperates with the insulating plate 2 below. For example, the pressure plate 1 is square.

[0041] like Figure 5 As shown, the stop structure includes an upper stop frame 9 and a lower stop frame 7. The lower stop frame 7 is an injection-molded part, and a lower stop frame limiting structure 17 is provided on it. The shape of the lower stop frame limiting structure 17 matches the pole post 6 to prevent the pole post 6 from rotating. The upper stop frame 9 and the lower stop frame 7 are fixed together by a snap-fit ​​to prevent the pole post 6 from loosening. Both the upper stop frame 9 and the lower stop frame 7 have injection holes 21 similar to those on the substrate 3.

[0042] Specifically, such as Figure 3As shown, a third positioning hole 20 is also provided on the upper stop frame 9. The third positioning hole 20 is used to pass through the pole post 6 and achieve a threaded connection with the upper pressure plate 1. The third positioning hole 20 matches the first positioning hole 18 provided on the substrate limiting groove 13 and the second positioning hole 19 provided on the insulating plate 2, and is used to fix the pole post 6 between the pressure plate 1 and the lower stop frame 7.

[0043] like Figure 1 , Figure 2 and Figure 5 As shown, the internal region of the battery cell, from the lower surface of the substrate 3 downwards, is provided with an upper stop frame 9, a sealing ring 4, a connecting piece 5, an electrode post 6, and a lower stop frame 7. The upper stop frame 9, through the substrate limiting groove 13, matches the outer contour shape of the insulating plate 2, serving a positioning function. A protrusion on the upper stop frame 9 engages with a corresponding space on the substrate 3 to position the upper stop frame 9. The connecting piece 5 has a connecting piece mounting hole 14, through which the electrode post 6 passes for fixation. The external thread 16 of the electrode post 6 matches the internal thread 12 of the pressure plate. The sealing ring 4 is used to seal between the electrode post 6 and the substrate 3. The upper stop frame 9 and the lower stop frame 7 are fixed together by a snap-fit ​​mechanism, forming a stop frame structure to prevent the electrode post 6 from loosening.

[0044] Specifically, such as Figure 6 As shown, the connecting piece 5 is an integrally formed bent component, including a first bent portion and a second bent portion extending downward along one side edge of the first bent portion. A connecting piece mounting hole 14 is provided on the first bent portion for the pole post 6 to pass through. The second bent portion has a U-shaped structure, with the opening of the U-shaped structure located away from the edge of the first bent portion.

[0045] like Figure 7 As shown, the outer circumference of the pole post 6 is provided with an external thread 16, and one end of the pole post 6 is provided with a flange face. The center of the flange face is provided with a pole post tightening hole 15. The pole post tightening hole 15 cooperates with the lower stop bracket limiting structure 17 to restrict the rotation of the pole post 6 and prevent the pole post 6 from loosening.

[0046] It should be noted that the installation sequence of the battery cell cover of this utility model is as follows: the pressure plate 1, insulating plate 2, base plate 3, upper stop bracket 9, sealing ring 4, connecting piece 5, pole 6, and lower stop bracket 7 are screwed together and fixed by the pressure plate 1 and pole 6. During the screwing process, the pressure plate 1 remains stationary, and the pole 6 is tightened by rotating it through the pole tightening hole 15. The lower stop bracket 7 and the upper stop bracket 9 are engaged by a snap-fit ​​method, which restricts the pole 6 from loosening. The above connection method allows for easy disassembly and recycling. The pressure plate 1 is fixed inside the insulating plate 2, and the insulating plate 2 is fixed inside the base plate limiting groove 13. The internal thread 12 of the pressure plate matches the external thread 16 of the pole. The entire base plate 3 is processed by stamping, and the explosion-proof valve 8 and sealing piece 10 are fixed to the base plate 3 by welding.

[0047] This utility model is not limited to any particular structural form of the pressure plate 1 and the pole post 6, as long as the pressure plate 1 and the pole post 6 can be screwed together and the reliability of the screwing is guaranteed.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery cell cover structure, characterized in that, include: The substrate (3) divides the cover plate into an external area of ​​the cell and an internal area of ​​the cell; Pressure plate (1) is located in the external area of ​​the battery cell; A stop structure is provided in the internal area of ​​the battery cell. The stop structure includes a lower stop frame (7) and a lower stop frame limiting structure (17) is provided on the lower stop frame (7). The pole (6) penetrates the internal and external regions of the battery cell. The upper end of the pole (6) is detachably connected to the pressure plate (1), and the lower end is detachably connected to the lower stop frame limiting structure (17).

2. The cell cover structure according to claim 1, characterized in that, An insulating plate (2) is disposed between the substrate (3) and the pressure plate (1); The pressure plate (1) is fixed on the insulating plate (2). The pressure plate (1) has a threaded hole with an internal thread (12). The insulating plate (2) has a second positioning hole (19).

3. The cell cover structure according to claim 2, characterized in that, The substrate (3) is provided with a substrate limiting groove (13), an explosion-proof valve mounting structure (22) and a liquid injection hole (21); The first positioning hole (18) is provided on the substrate limiting groove (13).

4. The cell cover structure according to claim 3, characterized in that, The internal region of the battery cell is provided with an upper stop frame (9), a sealing ring (4), a connecting piece (5), a pole post (6), and a lower stop frame (7) in sequence from the lower surface of the substrate (3) downwards; A third positioning hole (20) is provided on the upper stop (9); The connecting piece (5) has a connecting piece mounting hole (14).

5. The cell cover structure according to claim 4, characterized in that, The first positioning hole (18), the second positioning hole (19), the third positioning hole (20) and the connecting piece mounting hole (14) are configured to install the pole post (6) between the lower stop frame (7) and the pressure plate (1).

6. The cell cover structure according to any one of claims 2-5, characterized in that, One end of the pole (6) is provided with a flange face, and a pole tightening hole (15) is provided on the flange face. The pole tightening hole (15) cooperates with the lower stop frame limiting structure (17). The outer circumferential surface of the pole post (6) is provided with an external thread (16), which is engaged with the internal thread (12) of the pressure plate.

7. The cell cover structure according to claim 4, characterized in that, The upper stop (9) and the lower stop (7) are fixed together by a snap-fit ​​connection.

8. The cell cover structure according to claim 3, characterized in that, An explosion-proof valve (8) is installed on the explosion-proof valve mounting structure (22).

9. The cell cover structure according to claim 3, characterized in that, The battery cell cover structure also includes a sealing plate (10) and a sealing pin (11). The sealing plate (10) is fixed in the groove of the injection hole (21), and the sealing pin (11) is installed in the groove to seal the injection hole (21).

10. A battery cell, characterized in that, Includes the removable cell cover structure as described in any one of claims 1-9.

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