Encapsulated ring and battery top cover

Abstract

The utility model belongs to the technical field of battery structure, disclose a kind of rubber-coated compression ring and battery top cover.The rubber-coated compression ring has metal annular part and insulating rubber-coated part, the inner periphery of metal annular part is provided with at least two first protruding parts, first protruding part is limited with through space between first protruding part, through space is used for for pole post to pass through, one side of first protruding part can abut on pole post, to apply the pressure of first protruding part other side to rubber-coated compression ring, insulating rubber-coated part is set to the end surface of metal annular part, for the insulating arrangement of metal annular part and top cover plate.Through metal annular part, enough structural strength can be generated in limited space between pole post with pressure, to connect pole post and top cover plate fixedly, avoid welding defect.At the same time, insulating rubber-coated part can avoid the conductive connection between top cover plate and pole post, and can avoid the process of additional setting insulating upper plastic, to simplify the assembly process of battery, reduce assembly cost, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery structure technology, and in particular to a rubber-coated pressure ring and a battery top cover. Background Technology

[0002] Currently, most battery top covers on the market use welding to connect the terminals to the top cover. Although welding is highly efficient, this process has significant stability issues, easily producing defects such as weld holes, sparks, incomplete welds, and misaligned welds, severely impacting connection reliability and product yield. Furthermore, poor welding often leads to the scrapping of the entire top cover, resulting in material waste and increased production costs.

[0003] To replace welding, some battery top covers use riveting or snap-fit ​​connections. For example, in snap-fit ​​connections, a pressure ring is placed on one side of the top cover, and the terminal post passes through from the other side and snaps into the pressure ring, thus clamping the top cover between the terminal post and the pressure ring for fixation. However, these mechanical connection methods also have significant drawbacks. For instance, the pressure ring is limited by size requirements, resulting in lower structural strength and consequently poor battery sealing and stability.

[0004] Based on the above, there is an urgent need for a rubber-coated pressure ring and a battery top cover to at least solve one of the aforementioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a rubber-coated pressure ring and a battery top cover, which can improve the sealing and stability of the battery within a limited volume.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Rubber-coated compression rings, including:

[0008] A metal ring-shaped portion, wherein at least two first protrusions are provided on the inner circumferential surface of the metal ring-shaped portion, and a first notch is formed between adjacent two first protrusions in the circumferential direction of the metal ring-shaped portion, and a second notch is provided between the first protrusions in the radial direction of the metal ring-shaped portion, the first notch and the second notch defining a passage space for the electrode post to pass through, and one side of the first protrusion can abut against the electrode post in the axial direction of the metal ring-shaped portion to apply pressure toward the other side of the first protrusion to the rubber-coated pressure ring;

[0009] An insulating coating portion is disposed on the end face of the metal ring portion, and the insulating coating portion is used to insulate the metal ring portion and the top cover plate.

[0010] In some embodiments, the insulating coating is applied to both end faces and the outer peripheral face of the metal ring portion.

[0011] In some embodiments, along the axial direction of the metal ring portion, the first protrusion is disposed at one end of the inner circumferential surface of the metal ring portion, and the first protrusion is spaced apart from the end face of the other end of the metal ring portion on the inner circumferential surface of the metal ring portion.

[0012] In some embodiments, the end face of the metal ring portion near the first protrusion is covered by the insulating coating portion, and the outer peripheral surface of the metal ring portion is covered by the insulating coating portion.

[0013] In some embodiments, the insulating coating portion has a raised positioning structure located on the end face of the coating pressure ring near the first raised portion, and the raised positioning structure is used to be inserted into the top cover plate to position the coating pressure ring.

[0014] In some embodiments, the protrusion positioning structure is an annular protrusion, the top cover plate is provided with a pole post hole, and the annular protrusion can be inserted into the pole post hole and abut against the inner wall of the pole post hole.

[0015] In some embodiments, the pole hole is a stepped hole with a first stepped hole portion and a second stepped hole portion. The diameter of the first stepped hole portion is larger than that of the second stepped hole portion and a stepped surface is formed. The insulating coating portion can be inserted into the pole hole and abut against the inner wall of the first stepped hole portion, the inner wall of the second stepped hole portion, and the stepped surface.

[0016] In some embodiments, the thickness of the portion of the insulating coating that abuts the stepped surface is not less than 0.5 mm.

[0017] In some embodiments, the metal ring portion is an aluminum ring, and the insulating coating portion comprises insulating plastic, the insulating coating portion being integrally connected to the metal ring portion; or...

[0018] The metal ring portion is made of aluminum, and the insulating coating portion includes insulating plastic and conductive plastic, which are integrally connected to the metal ring portion.

[0019] The battery top cover includes a terminal post, a top cover plate, and a rubber-coated pressure ring as described above. The top cover plate has a terminal post hole, through which the terminal post can pass sequentially through the terminal post hole and the passage space of the rubber-coated pressure ring. One end of the terminal post is provided with at least two spaced second protrusions, which can pass through a first notch in the rubber-coated pressure ring and rotate around the axis of the terminal post to abut against the first protrusion of the rubber-coated pressure ring in the direction toward the top cover plate.

[0020] The beneficial effects of the insulated pressure ring and battery top cover of this utility model are as follows: The insulating insulated part is disposed on the end face and outer peripheral surface of the metal ring, which can insulate the metal ring and the top cover plate, thereby preventing the terminal from forming a conductive connection between the insulated pressure ring and the top cover plate. Therefore, through the metal ring, sufficient structural strength can be generated between the terminal and the metal ring within a limited space to generate pressure, thereby fixing the terminal and the top cover plate together and avoiding welding defects caused by welding processes. At the same time, the insulating insulated part can prevent a conductive connection between the top cover plate and the terminal and can avoid the additional process of applying insulating plastic, thereby simplifying the battery assembly process, reducing assembly costs, and improving production efficiency. Attached Figure Description

[0021] Figure 1 This is a perspective view of the rubber-coated compression ring provided by this utility model;

[0022] Figure 2 This is a top view of the rubber-coated compression ring provided by this utility model;

[0023] Figure 3 It is along Figure 2 Internal structure diagram of the rubber-coated compression ring in the AA direction;

[0024] Figure 4 This is a bottom view of the rubber-coated pressure ring provided by this utility model;

[0025] Figure 5 This is an exploded view of the battery top cover provided by this utility model;

[0026] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle;

[0027] Figure 7 This is a top view of the battery top cover provided by this utility model;

[0028] Figure 8 It is along Figure 7 Internal structure diagram of the battery top cover in the CC direction;

[0029] Figure 9 yes Figure 8 A magnified view of a section at point D.

[0030] In the picture:

[0031] 1. Rubber-coated pressure ring; 11. Metal ring-shaped part; 111. First protrusion; 112. First notch; 113. Second notch; 12. Insulating rubber-coated part; 121. Protrusion positioning structure;

[0032] 2. Pole post; 21. Second protrusion; 22. Abutment part;

[0033] 3. Top cover plate; 31. Pole post hole; 311. First stepped hole section; 312. Second stepped hole section; 313. Stepped surface;

[0034] 4. Lower plastic;

[0035] 5. Sealing ring. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 refer to 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 utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] The following is based on the appendix Figure 1 To be continued Figure 9 This invention introduces the rubber-coated pressure ring 1 and the battery top cover provided by this utility model.

[0041] like Figure 1 , Figure 2 As shown, in this embodiment, the rubber-coated pressure ring 1 includes a metal ring-shaped portion 11 and an insulating rubber-coated portion 12 integrally formed with the metal ring-shaped portion 11. The inner circumferential surface of the metal ring-shaped portion 11 has at least two first protrusions 111. Around the circumferential direction of the metal ring-shaped portion 11, adjacent first protrusions 111 are spaced apart and have first notches 112 formed between them. Furthermore, along the radial direction of the metal ring-shaped portion 11, the first protrusions 111 are spaced apart and define second notches 113. The first notches 112 and the second notches 113 define a passage space for the electrode post 2 to pass through. When the electrode post 2 passes sequentially through the top cover plate 3 and the rubber-coated pressure ring 1, one side of the first protrusion 111 can abut against the electrode post 2 along the axial direction of the metal ring-shaped portion 11, thereby applying pressure to the rubber-coated pressure ring 1 towards the other side of the first protrusion 111, i.e., towards the top cover plate 3. The pole post 2 can abut against the top cover plate 3 on the side away from the rubber-coated pressure ring 1, thereby applying pressure to the top cover plate 3 towards the rubber-coated pressure ring 1. At this time, both sides of the top cover plate 3 are under pressure along the axial direction of the rubber-coated pressure ring 1, which can fix the pole post 2, the top cover plate 3 and the rubber-coated pressure ring 1, thereby achieving the effect of connecting the pole post 2 and the top cover plate 3.

[0042] The insulating coating 12 is disposed on the end face and outer peripheral surface of the metal ring portion 11, which can insulate the metal ring portion 11 and the top cover plate 3, thereby preventing the electrode post 2 from forming a conductive connection between the coating ring 1 and the top cover plate 3. Therefore, the metal ring portion 11 can generate pressure between itself and the electrode post 2 with sufficient structural strength within a limited space, thereby fixing the electrode post 2 and the top cover plate 3 together and avoiding welding defects caused by welding processes. At the same time, the insulating coating 12 can prevent a conductive connection between the top cover plate 3 and the electrode post 2, and can avoid the additional process of applying insulating plastic, thereby simplifying the battery assembly process, reducing assembly costs, and improving production efficiency.

[0043] Optionally, such as Figure 2 , Figure 3 As shown, in this embodiment, along the axial direction of the metal ring portion 11, a first protrusion 111 is disposed at one end of the inner circumferential surface of the metal ring portion 11, and the first protrusion 111 is spaced apart from the end face of the other end of the metal ring portion 11 on the inner circumferential surface of the metal ring portion 11. This spaced arrangement allows sufficient installation space for the electrode post 2, thereby preventing the electrode post 2 from protruding beyond the rubber-coated pressure ring 1 along the axial direction of the metal ring portion 11. This reduces the thickness dimension of the battery top cover, which is beneficial for further improving the energy density of the battery.

[0044] Furthermore, an insulating coating 12 is provided on the end face of the metal ring portion 11 near the first protrusion 111. This insulating coating 12 prevents the metal ring portion 11 from making an electrical connection with the top cover plate 3 through this end face. Meanwhile, in some embodiments, such as... Figure 3 As shown, the insulating coating 12 also covers the outer peripheral surface of the metal ring 11, thereby preventing the metal ring 11 from being electrically connected to the top cover plate 3 through the outer peripheral surface.

[0045] Furthermore, in this embodiment, both end faces and the outer peripheral surface of the metal annular portion 11 are covered with insulating rubber coating portions 12. This arrangement not only ensures insulation between the metal annular portion 11 and the top cover plate 3, but also guarantees the structural integrity between the metal annular portion 11 and the insulating rubber coating portion 12, thereby preventing separation of the insulating rubber coating portion 12 and the metal annular portion 11. Simultaneously, when feeding materials using a vibratory feeder or similar method, the insulating rubber coating portion 12 prevents direct vibration and friction between the metal annular portions 11, thereby preventing the generation of metal powder and avoiding metal powder contamination of the battery.

[0046] Optionally, in this embodiment, as Figure 3 , Figure 4 As shown, the insulating coating part 12 has a raised positioning structure 121. The raised positioning structure 121 is located on the end face of the coating pressure ring 1 near the first raised part 111. The raised positioning structure 121 is used to be inserted into the pole hole 31 of the top cover plate 3 to position the coating pressure ring 1.

[0047] like Figure 5 As shown, the terminal hole 31 is a stepped hole with a first stepped hole portion 311 and a second stepped hole portion 312. The diameter of the first stepped hole portion 311 is larger than that of the second stepped hole portion 312 and a stepped surface 313 is formed. The insulating coating portion 12 can be inserted into the terminal hole 31 and abut against the inner wall of the first stepped hole portion 311, the inner wall of the second stepped hole portion 312, and the stepped surface 313. During assembly, by inserting the protruding positioning structure 121 into the terminal hole 31, both a foolproof effect and a pre-fixing effect can be achieved, thereby further facilitating the assembly of the battery top cover.

[0048] Preferably, in this embodiment, the raised positioning structure 121 is an annular protrusion, which can circumferentially abut against the inner wall of the second stepped hole 312, thereby achieving a better positioning and error prevention effect.

[0049] This utility model also provides a battery top cover, such as Figures 5 to 9As shown, the battery top cover includes a terminal post 2, a top cover plate 3, and the aforementioned rubber-coated pressure ring 1. The top cover plate 3 has a terminal post hole 31, through which the terminal post 2 can pass sequentially through the terminal post hole 31 and the passage space of the rubber-coated pressure ring 1. One end of the terminal post 2 is provided with at least two spaced-apart second protrusions 21. These second protrusions 21 can pass through a first notch 112 in the rubber-coated pressure ring 1 and rotate around the axis of the terminal post 2 to abut against the first protrusion 111 in the direction toward the top cover plate 3.

[0050] By using the rubber-coated pressure ring 1, sufficient structural strength can be generated between the pressure ring and the terminal post 2 within a limited space, thereby fixing the terminal post 2 and the top cover plate 3 together and avoiding welding defects caused by welding processes. At the same time, the rubber-coated pressure ring 1 can prevent conductive connection between the top cover plate 3 and the terminal post 2, and can also avoid the need for an additional process of applying insulating plastic, thereby simplifying the battery assembly process, reducing assembly costs, and improving production efficiency.

[0051] Specifically, such as Figure 8 , Figure 9 As shown, the battery top cover also includes a lower plastic 4 and a sealing ring 5. One end of the terminal post 2 has the aforementioned second protrusion 21, and the other end has an abutment portion 22. The sealing ring 5 is fitted onto the terminal post 2, which can pass through the lower plastic 4 and the top cover plate 3 in sequence, and connect with the rubber-coated pressure ring 1. Furthermore, when the terminal post 2, the top cover plate 3, and the rubber-coated pressure ring 1 are fixedly connected, the sealing ring 5 seals against the abutment portion 22 and the lower plastic 4, effectively preventing electrolyte leakage.

[0052] Preferably, in this embodiment, the portion of the insulating coating 12 that abuts against the stepped surface 313 is not less than 0.5 mm, thereby preventing the insulating coating 12 from breaking under stress and causing a short circuit in the battery, thus ensuring the safety of the battery.

[0053] It should be noted that, for the rubber-coated pressure ring 1, when it is positioned between the negative electrode post 2 and the top cover plate 3, the metal annular portion 11 is made of aluminum, and the insulating rubber-coated portion 12 is made of insulating plastic, such as insulating PPS. However, when the rubber-coated pressure ring 1 is positioned between the positive electrode post 2 and the positive electrode post 2, its insulating rubber-coated portion 12 can be supported by both insulating and conductive plastic, maintaining a relative conductive connection between the positive electrode post 2 and the top cover plate 3. This is because the top cover plate 3 is mostly supported by aluminum, which can utilize the voltage of the aluminum to prevent self-reaction, thereby blocking the corrosion reaction potential and preventing corrosion of the top cover plate 3.

[0054] Furthermore, compared to the scheme of separately installing the metal ring portion 11 and the insulating coating portion 12, in this embodiment, the two are connected as one piece. This can avoid direct mutual friction between the metal ring portions 11 during the assembly process, thus preventing the generation of metal powder. At the same time, it can reduce the number of assembly mechanisms and simplify the structure of the assembly mechanisms, thereby greatly reducing equipment costs and improving the performance and safety of the battery.

[0055] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. 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.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rubber-coated compression ring, characterized in that, include: A metal ring portion (11) has at least two first protrusions (111) on its inner circumferential surface. A first notch (112) is formed between two adjacent first protrusions (111) in the circumferential direction of the metal ring portion (11). A second notch (113) is formed between the first protrusions (111) in the radial direction of the metal ring portion (11). The first notch (112) and the second notch (113) define a passage space for the pole post (2) to pass through. In the axial direction of the metal ring portion (11), one side of the first protrusion (111) can abut against the pole post (2) to apply pressure to the rubber-coated pressure ring (1) toward the other side of the first protrusion (111). An insulating coating part (12) is disposed on the end face of the metal ring part (11), and the insulating coating part (12) is used to insulate the metal ring part (11) and the top cover plate (3).

2. The rubber-coated compression ring according to claim 1, characterized in that, The two end faces and the outer peripheral face of the metal ring (11) are covered with the insulating coating (12).

3. The rubber-coated compression ring according to claim 1, characterized in that, Along the axial direction of the metal ring portion (11), the first protrusion (111) is disposed at one end of the inner circumferential surface of the metal ring portion (11), and is spaced apart between the first protrusion (111) and the end face of the other end of the metal ring portion (11) on the inner circumferential surface of the metal ring portion (11).

4. The rubber-coated compression ring according to claim 3, characterized in that, The insulating coating portion (12) is provided on the end face of the metal ring portion (11) near the first protrusion (111), and the insulating coating portion (12) is provided on the outer peripheral surface of the metal ring portion (11).

5. The rubber-coated compression ring according to claim 4, characterized in that, The insulating coating part (12) has a raised positioning structure (121), which is located on the end face of the coating pressure ring (1) near the first raised part (111). The raised positioning structure (121) is used to be inserted into the top cover plate (3) to position the coating pressure ring (1).

6. The rubber-coated compression ring according to claim 5, characterized in that, The protrusion positioning structure (121) is an annular protrusion, and the top cover plate (3) is provided with a pole hole (31). The annular protrusion can be inserted into the pole hole (31) and abut against the inner wall of the pole hole (31).

7. The rubber-coated compression ring according to claim 6, characterized in that, The pole hole (31) is a stepped hole and has a first stepped hole portion (311) and a second stepped hole portion (312). The diameter of the first stepped hole portion (311) is larger than that of the second stepped hole portion (312) and a stepped surface (313) is formed. The insulating coating portion (12) can be inserted into the pole hole (31) and abut against the inner wall of the first stepped hole portion (311), the inner wall of the second stepped hole portion (312) and the stepped surface (313).

8. The rubber-coated compression ring according to claim 7, characterized in that, The thickness of the portion of the insulating coating (12) that abuts against the stepped surface (313) is not less than 0.5 mm.

9. The rubber-coated compression ring according to claim 1, characterized in that, The metal ring portion (11) is made of aluminum, and the insulating coating portion (12) includes insulating plastic. The insulating coating portion (12) is integrally connected to the metal ring portion (11); or, The metal ring portion (11) is made of aluminum ring, and the insulating coating portion (12) includes insulating plastic and conductive plastic. The insulating coating portion (12) is integrally connected to the metal ring portion (11).

10. A battery top cover, characterized in that, The device includes an electrode post (2), a top cover plate (3), and a rubber-coated pressure ring (1) as described in any one of claims 1-9. The top cover plate (3) has an electrode post hole (31). The electrode post (2) can pass through the electrode post hole (31) and the passage space of the rubber-coated pressure ring (1) in sequence. At least two spaced second protrusions (21) are provided at one end of the electrode post (2). The second protrusions (21) can pass through the first notch (112) of the rubber-coated pressure ring (1) and rotate about the axis of the electrode post (2) to abut against the first protrusion (111) of the rubber-coated pressure ring (1) in the direction toward the top cover plate (3).

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