Pole pre-assembly structure, top cover assembly and battery

Abstract

The utility model belongs to the technical field of battery structure, disclose a kind of pole post preassembly structure, top cover subassembly and battery.The pole post preassembly structure includes compression ring, pole post and insulating sealing element, the inside of compression ring has first via, along the axis direction of first via, one end of compression ring is provided first protruding, the other end of compression ring is provided with second protruding, and it is limited to form with accommodating space between first protruding and second protruding.The outside of compression ring can be connected with cover plate welding, first protruding and second protruding pole post clamping fixed, insulating sealing element insulating abuts between pole post and compression ring, and pole post and compression ring sealing connection.Through the pole post preassembly structure, it can make the installation procedure between pole post and insulating sealing element and the installation procedure between pole post and cover plate decoupling, avoid cover plate, pole post and the continuous positioning between insulating sealing element, and only need to be positioned respectively to reach the effect of accurate assembly, can greatly simplify assembly process, reduce production cost.

Description

Technical Field

[0001] This utility model relates to the field of battery structure technology, and in particular to a pre-installed terminal structure, a top cover assembly, and a battery. Background Technology

[0002] As a core component in new energy vehicles and energy storage systems, the safety and reliability of power batteries are of paramount importance. The top cover assembly is a key component of the power battery, typically including top cover plates, terminals, seals, and explosion-proof valves. Its assembly quality directly affects the battery's sealing performance, electrical connection reliability, and safety performance.

[0003] Currently, traditional power battery top cover assemblies typically employ a split design, requiring each component to be individually manufactured and assembled through multiple processes. For example, the terminal post and the top cover sheet need to be fixed together by welding, while insulating seals must be installed to ensure sealing and insulation. The welding process involves the precise alignment and fixing of multiple components, and each component needs to be assembled step by step. The manual or mechanical operation is time-consuming, increasing the production cycle and production costs.

[0004] Based on the above, there is an urgent need for a pre-installed pole structure, a top cover assembly, and a battery to at least solve one of the aforementioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a pre-installed pole structure, a top cover assembly, and a battery, which have the advantages of easy assembly and low cost.

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

[0007] The pre-installed pole structure includes:

[0008] A pressure ring, wherein the inner side of the pressure ring has a first through hole, and along the axial direction of the first through hole, one end of the pressure ring is provided with a first protrusion in the direction of the axial direction of the first through hole, and the other end of the pressure ring is provided with a second protrusion in the direction of the axial direction of the first through hole. A receiving space is defined between the first protrusion and the second protrusion, and the outer side of the pressure ring can be welded to the cover plate.

[0009] The electrode post is disposed along the axial direction of the first through hole, passing through the receiving space, and the first protrusion and the second protrusion are used to clamp and fix the electrode post.

[0010] An insulating seal is provided, which is insulated against the pole and the pressure ring, and seals the pole and the pressure ring together.

[0011] In some embodiments, a third protrusion is provided on the outer side of the pressure ring. The third protrusion extends radially along the first through hole and surrounds it circumferentially. The third protrusion is used for welding and sealing connection with the cover plate.

[0012] In some embodiments, a welding surface is formed on one side of the third protrusion, and the welding surface can abut against the cover plate along the axial direction of the first through hole and be welded to the cover plate.

[0013] In some embodiments, the pole post has a circumferential flange along the axial direction of the first through hole, the circumferential flange being positioned between the first protrusion and the second protrusion to secure the pole post.

[0014] In some embodiments, the pole post includes an aluminum portion and a copper portion, the aluminum portion and the copper portion being disposed abutting each other along the axial direction of the first through hole, the aluminum portion having a first flange portion, the copper portion having a second flange portion, and the circumferential flange including the first flange portion and the second flange portion.

[0015] In some embodiments, the insulating seal includes a plastic part and a sealing ring, both of which are sandwiched between the pole post and the pressure ring, and the sealing ring is sealingly connected between the pole post and the pressure ring.

[0016] In some embodiments, the sealing ring and the copper portion are disposed at one end of the first through hole near the second protrusion, the plastic part and the aluminum portion are disposed at the middle of the first through hole and near one end of the first protrusion, and the plastic part is used to fix the aluminum portion and the copper portion together.

[0017] In some embodiments, the first through hole and the second protrusion are formed by a stamping process, and the first protrusion is formed by a rolling process.

[0018] The top cover assembly includes a cover plate and the aforementioned pole post pre-installation structure. The cover plate is provided with a stamped mounting hole, the pole post pre-installation structure is disposed through the mounting hole, and the pole post pre-installation structure and the cover plate are welded together and sealed together.

[0019] The battery includes the aforementioned top cover assembly.

[0020] The beneficial effects of the pre-assembled terminal structure, top cover assembly, and battery of this utility model are as follows: Through the pre-assembled terminal structure, the terminal, insulating seal, and pressure ring can be fixed first, and then the terminal is welded to the cover plate. This decouples the installation process between the terminal and the insulating seal from the installation process between the terminal and the cover plate, avoiding continuous positioning between the cover plate, terminal, and insulating seal. Instead, precise assembly can be achieved by positioning them separately, which can greatly simplify the assembly process of the top cover assembly and battery and reduce production costs. Attached Figure Description

[0021] Figure 1 This is a perspective view of the pre-assembled pole structure provided by this utility model;

[0022] Figure 2 This is an internal structural diagram of the pre-assembled pole structure provided by this utility model;

[0023] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 4 yes Figure 2 A magnified view of a section at point B in the middle;

[0025] Figure 5 This is a top view of the top cover assembly provided by this utility model;

[0026] Figure 6 It is along Figure 5 A cross-sectional view along the CC direction;

[0027] Figure 7 yes Figure 6 A magnified view of a section at point D.

[0028] In the picture:

[0029] 1. Pressure ring; 11. First protrusion; 12. Second protrusion; 13. Third protrusion;

[0030] 2. Pole post; 21. Aluminum part; 211. First flange; 22. Copper part; 221. Second flange;

[0031] 3. Insulating seals; 31. Plastic parts; 32. Sealing rings;

[0032] 4. Cover plate. Detailed Implementation

[0033] 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.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," and "abutting" 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.

[0035] 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.

[0036] 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.

[0037] The following is based on the appendix Figure 1 To be continued Figure 7 This invention introduces the pre-installed pole structure, top cover assembly, and battery provided by this utility model.

[0038] like Figure 1 , Figure 2As shown, in this embodiment, the pre-assembled electrode structure includes a pressure ring 1, an electrode 2, and an insulating seal 3. The pressure ring 1 is an annular component with a first through hole on its inner side. Along the axial direction of the first through hole, one end of the pressure ring 1 has a first protrusion 11, and the other end has a second protrusion 12, both protrusions 11 and 12 being oriented towards the axis of the first through hole. A receiving space is defined between the first protrusion 11 and the second protrusion 12 along the axial direction of the first through hole. The electrode 2 and the insulating seal 3 are both disposed within the receiving space. The first protrusion 11 and the second protrusion clamp and fix the electrode 2, and the insulating seal 3 is disposed between the electrode 2 and the pressure ring 1, providing insulation and a sealed connection between the electrode 2 and the pressure ring 1. The outer side of the pressure ring 1 can be welded to a cover plate 4, thereby fixing and insulating the electrode 2 and the cover plate 4.

[0039] With this pre-assembled pole structure, the pole 2, insulating seal 3 and pressure ring 1 can be fixed first, and then the pole 2 can be welded to the cover plate 4. This decouples the installation process between the pole 2 and the insulating seal 3 from the installation process between the pole 2 and the cover plate 4, avoiding continuous positioning between the cover plate 4, the pole 2 and the insulating seal 3. Instead, precise assembly can be achieved by positioning them separately, which can greatly simplify the assembly process and reduce production costs.

[0040] Specifically, in this embodiment, both the first through hole and the second protrusion 12 are formed by a stamping process. Simultaneously, the stamping process forms a tubular protrusion at the edge of the first through hole, which is parallel to the axial direction of the first through hole. A rolling process changes the protrusion direction of the tubular protrusion, thereby forming the first protrusion 11. Therefore, when assembling this pre-assembled pole structure, the pole 2 and the insulating seal 3 can first be placed into the through hole using the tubular protrusion, and then the first protrusion 11 can be formed using the rolling process, thereby fixing the pole 2 and the insulating seal 3 between the first protrusion 11 and the second protrusion 12.

[0041] like Figure 2 , Figure 3 As shown, a third protrusion 13 is provided on the outer side of the pressure ring 1. The third protrusion 13 extends radially along the first through hole and surrounds it circumferentially. The third protrusion 13 is used for welding and sealing connection with the cover plate 4. The third protrusion 13 can increase the outer area of ​​the pressure ring 1, thereby facilitating the increase of the welding connection area between the pressure ring 1 and the cover plate 4, and improving the connection strength and sealing performance between the pressure ring 1 and the cover plate 4.

[0042] For example, a welding surface is formed on one side of the third protrusion 13. This welding surface can abut against the cover plate 4 along the axial direction of the first through hole, which facilitates the pre-fixation between the pressure ring 1 and the cover plate 4. At the same time, this welding surface can be welded to the cover plate 4, so that the circumferential portion of the pressure ring 1 can be welded to the cover plate 4.

[0043] like Figure 4 As shown, the electrode post 2 has a circumferential flange. Along the axial direction of the first through hole, the circumferential flange is positioned between the first protrusion 11 and the second protrusion 12 to fix the electrode post 2. Since the electrode post 2 is fixed by the circumferential flange, both ends of the electrode post 2 can protrude from the first protrusion 11 and the second protrusion 12 respectively, thereby facilitating the conductive connection between the electrode post 2 and the external circuit and the internal connecting piece.

[0044] Optionally, the terminal 2 includes an aluminum portion 21 and a copper portion 22, which are disposed abutting each other along the axial direction of the first via. The copper portion 22 is used to connect with the adapter plate, thereby reducing resistance. The aluminum portion 21 is used to connect with external circuitry, avoiding electrochemical corrosion caused by direct contact between dissimilar metals.

[0045] Specifically, in this embodiment, the aluminum portion 21 has a first flange portion 211, and the copper portion 22 has a second flange portion 221. The circumferential flange includes the first flange portion 211 and the second flange portion 221, that is, the first protrusion 11 abuts against the first flange portion 211, and the second protrusion 12 abuts against the second flange portion 221, thereby fixing the pole post 2.

[0046] Continue to refer to Figure 4 As shown, in this embodiment, the insulating seal 3 includes a plastic part 31 and a sealing ring 32. Both the plastic part 31 and the sealing ring 32 are sandwiched between the pole post 2 and the pressure ring 1, and the sealing ring 32 is sealingly connected between the pole post 2 and the pressure ring 1. Both the plastic part 31 and the sealing ring 32 are made of insulating material. When the plastic part 31 and the sealing ring 32 are sandwiched between the pole post 2 and the embossed pattern, they can insulate the plastic part 31 and the sealing ring 32, preventing the pole post 2 from being electrically connected through the pressure ring 1 and the cover plate 4. At the same time, the sealing ring 32 also seals the area between the pole post 2 and the embossed pattern, preventing leakage or the entry of foreign objects.

[0047] Specifically, in this embodiment, the sealing ring 32 and the copper portion 22 are disposed at one end of the first through hole near the second protrusion 12, and the plastic part 31 and the aluminum portion 21 are disposed in the middle of the first through hole and one end near the first protrusion 11, with the plastic part 31 fixing the aluminum portion 21 and the copper portion 22 together. The sealing ring 32 is disposed between the copper portion 22 and the pressure ring 1 to prevent electrolyte leakage. The plastic part 31 has a second through hole through which both the copper portion 22 and the aluminum portion 21 pass, and a limiting groove is formed on the inner wall of the second through hole. The first flange portion 211 and the second flange portion 221 can be simultaneously accommodated in the limiting groove, thereby achieving a fixed connection.

[0048] Specifically, when assembling the pre-assembled pole structure, the aluminum part 21 and the copper part 22 can be fixedly connected by the plastic part 31 first, then the sealing ring 32 can be fitted onto the copper part 22, and finally the pole 2 and the sealing ring 32 can be placed into the first through hole, and the first protrusion 11 can be formed by the rolling process, thereby fixing the pressure ring 1, the sealing ring 32, the plastic part 31, the aluminum part 21 and the copper part 22 together.

[0049] This utility model also provides a top cover assembly, such as Figures 5 to 7 As shown, the top cover assembly includes a cover plate 4 and the aforementioned pre-installed pole structure. The cover plate 4 has stamped mounting holes, through which the pre-installed pole structure passes. The pre-installed pole structure and the cover plate 4 are welded together and sealed. In this top cover assembly, assembly can be completed simply by welding the pre-installed pole structure and the cover plate 4, thus decoupling the installation steps from the insulating seal 3, greatly simplifying assembly and reducing assembly costs.

[0050] Preferably, such as Figure 7 As shown, the mounting hole is a stepped hole with a stepped surface. When the pre-assembled pole structure passes through the mounting hole, the aforementioned welding surface can abut against the stepped surface, thereby achieving pre-fixation of the pre-assembled pole structure and further facilitating welding. Simultaneously, the stamped stepped surface has better surface quality, effectively improving welding quality and reducing welding difficulty.

[0051] This invention also provides a battery including a top cover assembly as described above. In this battery, the top cover assembly can be assembled simply by welding the pre-installed terminal structure and the cover plate 4 together, thus decoupling the installation steps from the insulating seal 3, greatly simplifying assembly and reducing assembly costs.

[0052] 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.

[0053] 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 pre-assembled pole post structure, characterized in that, include: A pressure ring (1) has a first through hole on its inner side. Along the axial direction of the first through hole, one end of the pressure ring (1) is provided with a first protrusion (11) in the direction of the axis of the first through hole, and the other end of the pressure ring (1) is provided with a second protrusion (12) in the direction of the axis of the first through hole. A receiving space is defined between the first protrusion (11) and the second protrusion (12), and the outer side of the pressure ring (1) can be welded to the cover plate (4). The pole post (2) is disposed along the axial direction of the first through hole, passing through the receiving space, and the first protrusion (11) and the second protrusion (12) are used to clamp and fix the pole post (2); An insulating seal (3) is insulatingly abutted between the pole post (2) and the pressure ring (1), and seals the pole post (2) and the pressure ring (1) together.

2. The pre-assembled pole structure according to claim 1, characterized in that, The outer side of the pressure ring (1) is provided with a third protrusion (13), which extends along the radial direction of the first through hole and surrounds it circumferentially. The third protrusion (13) is used to weld and seal the cover plate (4).

3. The pre-installed pole post structure according to claim 2, characterized in that, A welding surface is formed on one side of the third protrusion (13), which can abut against the cover plate (4) along the axial direction of the first through hole and be welded to the cover plate (4).

4. The pre-installed pole post structure according to claim 1, characterized in that, The pole post (2) has a circumferential flange along the axial direction of the first through hole, and the circumferential flange is located between the first protrusion (11) and the second protrusion (12) to fix the pole post (2).

5. The pre-installed pole post structure according to claim 4, characterized in that, The pole post (2) includes an aluminum portion (21) and a copper portion (22). The aluminum portion (21) and the copper portion (22) are abutted together along the axial direction of the first through hole. The aluminum portion (21) has a first flange portion (211), and the copper portion (22) has a second flange portion (221). The circumferential flange includes the first flange portion (211) and the second flange portion (221).

6. The pre-installed pole post structure according to claim 5, characterized in that, The insulating seal (3) includes a plastic part (31) and a sealing ring (32). The plastic part (31) and the sealing ring (32) are both sandwiched between the pole post (2) and the pressure ring (1), and the sealing ring (32) is sealed between the pole post (2) and the pressure ring (1).

7. The pre-installed pole post structure according to claim 6, characterized in that, The sealing ring (32) and the copper part (22) are disposed at one end of the first through hole near the second protrusion (12), the plastic part (31) and the aluminum part (21) are disposed at the middle of the first through hole and one end near the first protrusion (11), and the plastic part (31) is used to fix the aluminum part (21) and the copper part (22) together.

8. The pre-installed pole post structure according to any one of claims 1-7, characterized in that, The first through hole and the second protrusion (12) are formed by a stamping process, and the first protrusion (11) is formed by a rolling process.

9. A top cover assembly, characterized in that, The device includes a cover plate (4) and a pre-installed pole structure as described in any one of claims 1-8. The cover plate (4) is provided with a stamped mounting hole, the pre-installed pole structure is disposed through the mounting hole, and the pre-installed pole structure and the cover plate (4) are welded together and sealed together.

10. A battery, characterized in that, It includes the top cover assembly as described in claim 9.

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