A pole terminal, cover plate assembly and battery

Abstract

The application relates to the technical field of batteries, in particular to a pole terminal, a cover plate assembly and a battery. The pole terminal comprises a first pole and a second pole, the first pole comprises a riveting part, the riveting part is provided with a riveting groove, the second pole is provided with a first riveting blind hole, the first riveting blind hole comprises a lead-in section and a riveting section, the lead-in section and the riveting section are sequentially connected in the direction from the hole opening to the hole bottom of the first riveting blind hole, the width of the longitudinal section of the riveting section gradually increases in the direction from the hole opening to the hole bottom, the riveting part can extend into the first riveting blind hole and be deformed to fill the riveting section under the action of external force, so that the first pole and the second pole can be connected, oxidation and corrosion between the first pole and the second pole can be avoided, the connection is reliable, the service life is long, the welding process is saved, the production efficiency is improved, and various disadvantages caused by welding can be avoided.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a terminal post, a cover plate assembly, and a battery. Background Technology

[0002] In the field of electrical connections, terminal blocks, as key components for connecting electrical equipment to external circuits, are widely used in many scenarios such as batteries and power systems. Their performance stability and reliability directly affect the operational safety and service life of the entire electrical system.

[0003] like Figure 1 As shown, the electrode terminals in related technologies generally consist mainly of an upper electrode 10. ， and lower pole 20 ， Composition, upper pole 10 ， and lower pole 20 ， They are usually connected by riveting or riveting followed by welding to meet the requirements of current conduction and mechanical support.

[0004] However, with this connection method, during use, external substances such as moisture and corrosive gases can easily seep into the upper electrode post 10. ， and lower pole 20 ， Within the gap, the upper pole 10 ， and lower pole 20 ， Oxidation or corrosion may occur between them, especially when the upper electrode post is 10. ， and lower pole 20 ， When made of different materials, electrochemical corrosion occurs due to potential differences. As oxidation or corrosion intensifies, it not only increases contact resistance and reduces conductivity, but may also lead to loose connections or even connection failures. This seriously affects the normal operation and safety of electrical equipment, significantly shortens the lifespan of the terminal blocks, and increases equipment maintenance costs and safety hazards. Furthermore, when the upper terminal block is 10... ， and lower pole 20 ， When riveting followed by welding is used for connection, the welding process is increased, production efficiency is reduced, and the welding process is prone to instability, which can lead to various welding defects such as incomplete welds and weld holes.

[0005] Therefore, there is an urgent need for a terminal block, cover plate assembly, and battery to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a terminal block, a cover plate assembly, and a battery that can prevent oxidation and corrosion between the first and second terminals, ensure reliable connection, and have a long service life.

[0007] To achieve the above objectives, the following technical solution is provided:

[0008] A pole terminal includes:

[0009] The first pole post includes a riveting part, wherein the riveting part has a riveting groove;

[0010] The second pole post has a first riveting blind hole, which includes an inlet section and a riveting section. The inlet section and the riveting section are connected sequentially from the opening to the bottom of the first riveting blind hole. The width of the longitudinal section of the riveting section gradually increases from the opening to the bottom of the hole. The riveting part can extend into the first riveting blind hole and deform to fill the riveting section under the action of external force to connect the first pole post and the second pole post.

[0011] As an optional solution, the angle between the riveted section and the vertical direction is B, where B ≥ 15°.

[0012] As an optional solution, the riveting part includes a first cylindrical part and an annular part connected to each other, and the riveting groove is formed by the end face of the annular part being recessed inward.

[0013] As an optional feature, the wall thickness of the annular portion is T, the height of the annular portion is H, and H / T≥1.

[0014] As an alternative, the width of the longitudinal section of the riveting groove gradually decreases from its opening to its bottom, and / or there is a decreasing phase.

[0015] As an optional solution, the riveting groove includes a flared section and a blind hole section, the flared section and the blind hole section being connected sequentially from the groove opening to the bottom of the riveting groove, and the width of the longitudinal section of the flared section gradually decreasing from the groove opening to the bottom of the groove.

[0016] As an optional solution, the angle between the flared section and the vertical direction is A, where 15°≤A≤60°.

[0017] As an optional solution, the diameter of the blind hole section is a, where a ≥ 3 mm.

[0018] A cover plate assembly includes a cover plate and the aforementioned pole terminal, the pole terminal being mounted on the cover plate.

[0019] A battery includes a housing and an electrode assembly, and further includes the aforementioned terminal post or the aforementioned cover plate assembly, wherein the electrode assembly is disposed within the housing, the cover plate assembly is disposed on the housing, and the terminal post is connected to the electrode assembly.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The electrode terminal provided by this invention, by riveting the riveted portion of the first electrode into the first riveted blind hole of the second electrode, means that the connection between the first electrode and the second electrode is not exposed to air. Therefore, it can prevent oxidation or corrosion at the connection between the first electrode and the second electrode, and extend the service life of the electrode terminal. By setting a riveting section whose width gradually increases from the opening to the bottom of the first riveted blind hole, the connection reliability of the first electrode and the second electrode can be improved, and the first electrode can be prevented from coming out of the second electrode. The connection between the first electrode and the second electrode by riveting saves welding steps, improves production efficiency, and avoids various defects caused by welding.

[0022] The cover plate assembly provided by the present invention, by applying the above-mentioned pole terminal, can avoid oxidation and corrosion between the first pole and the second pole, ensuring reliable connection and a long service life.

[0023] The battery provided by the present invention, by applying the above-mentioned terminal or cover plate assembly, can avoid oxidation and corrosion between the first and second terminals, ensuring reliable connection and a long service life. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0025] Figure 1 A cross-sectional view of a cover plate assembly provided in related technologies;

[0026] Figure 2 This is an anatomical view of the pole terminal before riveting, provided in an embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional view of the riveted pole terminal provided in an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the riveted structure of the first pole post provided in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of a cover plate assembly provided in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of another cover plate assembly provided in an embodiment of the present invention.

[0031] Figure label:

[0032] 10 ， Upper pole column; 20 ， Lower pole;

[0033] 100. Pole terminal;

[0034] 10. First pole post; 11. Riveting part; 111. First column part; 112. Annular part; 1121. Riveting groove; 11211. Flared section; 11212. Blind hole section; 12. Second column part; 13. Flat plate part;

[0035] 20. Second pole post; 21. First riveting blind hole; 211. Inlet section; 212. Riveting section; 22. Second riveting blind hole;

[0036] 200. Cover plate;

[0037] 400. Seals;

[0038] 500. Insulating components. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if 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", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] like Figures 2-4 As shown, this embodiment provides a pole terminal 100, which includes a first pole 10 and a second pole 20. The first pole 10 includes a riveting portion 11 with a riveting groove 1121. The second pole 20 has a first riveting blind hole 21, which includes an inlet section 211 and a riveting section 212. The inlet section 211 and the riveting section 212 are connected sequentially from the opening to the bottom of the first riveting blind hole 21. The width of the longitudinal section of the riveting section 212 gradually increases from the opening to the bottom. The riveting portion 11 can extend into the first riveting blind hole 21 and deform to fill the riveting section 212 under external force to connect the first pole 10 and the second pole 20.

[0046] By riveting the riveting portion 11 of the first pole post 10 into the first riveting blind hole 21 of the second pole post 20, the connection between the first pole post 10 and the second pole post 20 is not exposed to air. This prevents oxidation or corrosion at the connection between the first pole post 10 and the second pole post 20, extending the service life of the pole post terminal 100. By providing a riveting section 212 whose width gradually increases from the opening to the bottom of the first riveting blind hole 21, the connection reliability of the first pole post 10 and the second pole post 20 can be improved, preventing the first pole post 10 from coming out of the second pole post 20. The connection between the first pole post 10 and the second pole post 20 by riveting saves welding steps, improves production efficiency, and avoids various defects caused by welding.

[0047] Optionally, the angle between the riveting section 212 and the vertical direction is B, where B ≥ 15°, to ensure the connection strength between the first pole post 10 and the second pole post 20. Exemplarily, the value of the angle B between the riveting section 212 and the vertical direction can be 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, or 30°, etc. Of course, in other embodiments, the value of B is not limited to this, and designers can make adaptive adjustments according to actual needs.

[0048] Optionally, the riveting portion 11 includes a first cylindrical portion 111 and an annular portion 112 connected to each other. The first cylindrical portion 111 is disposed within the inlet section 211, and the riveting groove 1121 is formed by an inward recess from the end face of the annular portion 112. By providing the riveting groove 1121 in the annular portion 112, it is convenient for the outer side of the annular portion 112 to fill the periphery of the riveting section 212 during riveting, so that the annular portion 112 and the riveting section 212 are riveted together. To facilitate fastening after riveting, the first cylindrical portion 111 is cylindrical, and the inlet section 211 is a cylindrical hole adapted to the first cylindrical portion 111.

[0049] Optionally, the wall thickness of the annular portion 112 is T, the height of the annular portion 112 is H, and H / T≥1, so as to ensure that the annular portion 112 can be smoothly folded to fill the riveting section 212 in all directions and avoid material accumulation.

[0050] Optionally, the width of the longitudinal section of the riveting groove 1121 gradually decreases from its opening to its bottom, and / or has a decreasing phase, to prevent the annular portion 112 from failing to fold outwards to fill the riveting section 212, and further to avoid material accumulation.

[0051] For example, the riveting groove 1121 includes a flared section 11211 and a blind hole section 11212. The flared section 11211 and the blind hole section 11212 are connected sequentially from the groove opening to the bottom of the groove. The width of the longitudinal section of the flared section 11211 gradually decreases from the groove opening to the bottom of the groove to ensure that the annular portion 112 can be smoothly folded over to fill the riveting section 212 and avoid material accumulation.

[0052] Optionally, the angle between the flared section 11211 and the vertical direction is A, where 15° ≤ A ≤ 60°. This dimensional setting ensures that the annular portion 112 can smoothly fold outwards to fill the riveting section 212, preventing material accumulation. For example, the value of the angle A between the flared section 11211 and the vertical direction can be 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, or 60°. Of course, in other embodiments, the value of A is not limited to this, and designers can make adaptive adjustments according to actual needs.

[0053] Optionally, the diameter of the blind hole section 11212 is 'a', where 'a' ≥ 3 mm, to prevent the annular portion 112 from being unable to fold outwards to fill the riveting section 212. For example, the value of the diameter 'a' of the blind hole section 11212 can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, or 20 mm. Of course, in other embodiments, the value of 'a' is not limited to this, and designers can make adaptive adjustments according to actual needs.

[0054] It should be noted that in this embodiment, the second pole post 20 is riveted to the side away from the first riveting blind hole 21 by the riveting die, so that the riveting part 11 is subjected to force, and at least part of the material of the riveting part 11 expands and flows to fill the riveting section 212 of the first riveting blind hole 21, so as to complete the mechanical connection between the first pole post 10 and the second pole post 20. At this time, a second riveting blind hole 22 will be formed on the side of the second pole post 20 away from the first riveting blind hole 21.

[0055] Table 1

[0056]

[0057] Table 1 presents the relationship between the aperture a of the blind hole section 11212, the angle A between the flared section 11211 and the vertical direction, the height H of the annular portion 112, the wall thickness T of the annular portion 112, and H / T. Examples 1-6 show the values ​​of a, A, H, T, and H / T when the connection quality of the first pole post 10 and the second pole post 20 meets the requirements. Comparative Examples 1-4 show the values ​​of a, A, H, T, and H / T when the connection quality of the first pole post 10 and the second pole post 20 does not meet the requirements.

[0058] Specifically, after the first pole post 10 and the second pole post 20 are riveted together, the connection quality of the first pole post 10 and the second pole post 20 is judged in order to detect the connection quality of the first pole post 10 and the second pole post 20 after riveting.

[0059] In Examples 1-6, the values ​​of a, A, and H / T are all within the defined range. The second pole post 20 is riveted, the annular portion 112 of the first pole post 10 is well folded outward, and the first pole post 10 and the second pole post 20 are tightly fitted together.

[0060] In Comparative Example 1, the diameter of the blind hole section 11212 is too small. The material of the riveted second pole post 20 is directly pressed against the head of the annular part 112. The annular part 112 cannot be folded in all directions, resulting in a poor connection effect between the first pole post 10 and the second pole post 20.

[0061] In Comparative Example 2, the thickness of the annular portion 112 is greater than its height, and material accumulates at the head of the annular portion 112, making it difficult to fold outwards, resulting in a poor connection between the first pole post 10 and the second pole post 20.

[0062] In Comparative Example 3, the angle between the flared section 11211 and the vertical direction is too small, resulting in insufficient guiding effect. Material will accumulate at the head of the annular part 112 and cannot be folded in all directions, leading to poor connection between the first pole post 10 and the second pole post 20.

[0063] In Comparative Example 4, the angle between the flared section 11211 and the vertical direction is too large, resulting in insufficient guiding effect. Material will accumulate at the head of the annular part 112, making it impossible to fold outwards.

[0064] like Figure 5 As shown, this application also provides a cover plate assembly, which includes a cover plate 200 and the aforementioned pole terminal 100. The cover plate 200 is provided with a through hole, and the first pole 10 further includes a second column portion 12 connected to the riveting portion 11, the second column portion 12 passing through the through hole of the cover plate 200. By using the aforementioned pole terminal 100, the cover plate assembly can avoid oxidation, corrosion, etc., between the first pole 10 and the second pole 20, ensuring reliable connection and a long service life.

[0065] Optionally, the cross-section of the second column portion 12 can be cylindrical, elliptical, or prism. For ease of molding, the second column portion 12 in this embodiment is cylindrical.

[0066] Optionally, the first electrode post 10 further includes a flat plate portion 13 connected to the second column portion 12. Along the length direction of the cover plate 200, the size of the flat plate portion 13 is larger than the size of the second column portion 12, and the size of the second column portion 12 is larger than the size of the first column portion 111. Optionally, along the width direction of the cover plate 200, the size of the flat plate portion 13 is larger than the size of the second column portion 12, and the size of the second column portion 12 is larger than the size of the first column portion 111. The flat plate portion 13 and the second electrode post 20 are located on opposite sides of the thickness direction of the cover plate 200 to ensure a good connection between the electrode post terminal 100 and the cover plate 200. For example, as... Figure 5 As shown, the flat plate 13 is located outside the cover plate 200, at which point the first pole post 10 and the second pole post 20 are tightly connected and well-sealed. Figure 6 As shown, the flat plate 13 is located inside the cover plate 200, and oxidation and corrosion are not likely to occur between the first pole post 10 and the second pole post 20. The connection is reliable and has a long service life.

[0067] Optionally, the cover assembly also includes a seal 400, which is annular and disposed within the through hole of the cover 200 and located on the outer periphery of the second column portion 12. The seal 400 seals the second column portion 12 and the through hole of the cover 200 to prevent leakage of liquid inside the battery at the through hole.

[0068] Optionally, the cover plate assembly also includes an insulating element 500. Insulating elements 500 are provided between the second pole post 20 and the cover plate 200, and between the flat plate portion 13 and the cover plate 200, to ensure that the first pole post 10 and the second pole post 20 are insulated from the cover plate 200, thus preventing short circuits between the first pole post 10 and the second pole post 20 and the cover plate 200. The insulating element 500 located on the outer side of the cover plate 200 is made of upper plastic, and the insulating element 500 located on the inner side of the cover plate 200 is made of lower plastic.

[0069] This application also provides a battery comprising a casing, an electrode assembly, and the aforementioned terminal 100 or cover plate assembly. The electrode assembly is disposed within the casing, and the cover plate assembly is disposed on the casing. The terminal 100 is connected to the electrode assembly, and the electrical energy generated by the electrode assembly can be transmitted to external electrical devices through the terminal 100. By using the aforementioned terminal 100 or cover plate assembly, oxidation and corrosion between the first terminal 10 and the second terminal 20 can be avoided, resulting in a reliable connection and a long service life.

[0070] Note that 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.

[0071] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A pole terminal, characterized in that, include: The first pole post (10) includes a riveting part (11), wherein the riveting part (11) is provided with a riveting groove (1121). The second pole post (20) has a first riveting blind hole (21). The first riveting blind hole (21) includes an inlet section (211) and a riveting section (212). The inlet section (211) and the riveting section (212) are connected sequentially from the opening to the bottom of the first riveting blind hole (21). The width of the longitudinal section of the riveting section (212) gradually increases from the opening to the bottom of the hole. The riveting part (11) can extend into the first riveting blind hole (21) and deform to fill the riveting section (212) under the action of external force to connect the first pole post (10) and the second pole post (20). A second riveting blind hole (22) will be formed on the side of the second pole post (20) away from the first riveting blind hole (21). The angle between the riveted section (212) and the vertical direction is B, where B ≥ 15°; The riveting part (11) includes a first column part (111) and an annular part (112) connected to each other, and the riveting groove (1121) is formed by the end face of the annular part (112) being recessed inward; The wall thickness of the annular portion (112) is T, and the height of the annular portion (112) is H, where H / T≥1.

2. The electrode terminal according to claim 1, characterized in that, The width of the longitudinal section of the riveting groove (1121) gradually decreases from its opening to its bottom, and / or there is a decreasing phase.

3. The electrode terminal according to claim 2, characterized in that, The riveting groove (1121) includes a flared section (11211) and a blind hole section (11212). The flared section (11211) and the blind hole section (11212) are connected sequentially from the opening to the bottom of the riveting groove (1121). The width of the longitudinal section of the flared section (11211) gradually decreases from the opening to the bottom of the groove.

4. The electrode terminal according to claim 3, characterized in that, The angle between the flared section (11211) and the vertical direction is A, where 15°≤A≤60°.

5. The electrode terminal according to claim 3, characterized in that, The diameter of the blind hole section (11212) is a, where a ≥ 3 mm.

6. A cover plate assembly, comprising a cover plate (200), characterized in that, It also includes the pole terminal as described in any one of claims 1-5, the pole terminal being mounted on the cover plate (200).

7. A battery, comprising a casing and an electrode assembly, characterized in that, It also includes the pole terminal as described in any one of claims 1-5 or the cover plate assembly as described in claim 6, wherein the pole group is disposed within the housing, the cover plate assembly is disposed on the housing, and the pole terminal is connected to the pole group.

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