Pole and pole end structure of cylindrical battery

Abstract

The utility model discloses a pole and a pole end structure of a cylindrical battery, the bottom of a stud of the pole is connected with a collector plate, the top of the stud is provided with a taper hole, the diameter of the taper hole is gradually reduced from the top of the stud to the bottom of the stud, the side wall of the stud is provided with at least one crevasse, one side of a nut is provided with a threaded hole, and the other side of the nut is provided with a threaded hole. A conical column is arranged at the bottom of the threaded hole, the diameter of the conical column is gradually reduced in the direction towards the outer side of the threaded hole, the conical column is used in cooperation with the conical hole, the maximum diameter of the conical column is larger than the maximum inner diameter of the conical hole, and the height of the conical column is smaller than or equal to the depth of the conical hole. The utility model has the beneficial effects that the structure of the stud and the nut is optimized, when the nut is connected with the stud, the stud and the nut are tightly attached, the loosening of the stud and the nut can be effectively prevented, meanwhile, the sealing effect can be achieved, welding is not needed in the assembling process of the cylindrical battery after the stud and the nut are connected, the process is simplified, the equipment investment is reduced, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cylindrical battery technology, specifically to an electrode post and a cylindrical battery electrode post end structure. Background Technology

[0002] Cylindrical batteries are characterized by high capacity, long cycle life, and a wide operating temperature range, and are widely used in consumer electronics, electric vehicles, energy storage systems, and other fields. A cylindrical battery mainly consists of a casing, cells, a cover plate, and terminals. Insulators and seals are typically installed between the terminals and the casing to achieve insulation and sealing. In traditional cylindrical batteries, the terminals and casing are usually fixed together by stamping and riveting. This stamping and riveting process requires withstanding significant impact pressure, and the insulation is prone to breakage during the riveting process, leading to a risk of short circuit between the terminals and the casing. This is a problem that urgently needs to be solved in the assembly process of cylindrical batteries.

[0003] Currently, in order to solve this problem, studs have been used as poles, and the poles are fixed to the outer shell by the threaded connection between the nut and the stud. Although this method can effectively avoid the crushing of the insulation by riveting, in order to prevent the stud and pole from loosening, the nut and stud still need to be welded together after the nut is tightened, which introduces a welding process, increases the assembly process, and increases costs. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a terminal post and cylindrical battery terminal post structure. The structure of the stud and nut is optimized. When the nut is connected to the stud, the stud and nut fit tightly, which can effectively prevent the stud and nut from loosening. At the same time, it can also play a sealing role. In the process of cylindrical battery assembly, after the stud and nut are connected, there is no need for welding, which simplifies the process, reduces equipment investment, and lowers costs.

[0005] The purpose of this utility model is achieved through the following technical measures: a pole post, including a stud and a nut used in conjunction with the stud, the bottom of the stud being connected to a collector plate, the top of the stud having a tapered hole, the diameter of the tapered hole gradually decreasing from the top to the bottom of the stud, the side wall of the stud having at least one notch, the nut having a threaded hole on one side, the bottom of the threaded hole having a tapered post, the diameter of the tapered post gradually decreasing towards the outside of the threaded hole, the tapered post and the tapered hole being used in conjunction, the maximum diameter of the tapered post being greater than the maximum inner diameter of the tapered hole, and the height of the tapered post being less than or equal to the depth of the tapered hole.

[0006] In some embodiments, the tapered hole is a tapered blind hole, or the tapered hole penetrates the manifold.

[0007] In some embodiments, the stud has a connecting platform at its bottom, which is connected to the collector plate.

[0008] A cylindrical battery terminal structure includes the terminal, a battery housing, an insulating component, a sealing ring, and a nut insulating gasket. The battery housing has a terminal through hole, a current collector is built into the battery housing, a stud extends through the terminal through hole to the outside of the battery housing, the insulating component is used to insulate the battery housing from the current collector and the stud, the sealing ring is used to seal between the battery housing and the stud, the nut is located on the outside of the battery housing and connected to the stud, and the nut insulating gasket is disposed between the nut and the battery housing.

[0009] In some embodiments, the insulating assembly includes a current collector insulating pad and an insulating positioning ring. The current collector insulating pad is disposed between the current collector and the battery housing, and the insulating positioning ring is sleeved on the outside of the stud and located between the stud and the battery housing.

[0010] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention optimizes the structure of the stud and nut. By opening a tapered hole and a notch in the stud, and setting a tapered post inside the nut, with the tapered post and tapered hole having an interference fit, when the nut and stud are connected, the tapered post exerts pressure on the sidewall of the tapered hole, causing the sidewall of the tapered hole to expand outward, making the stud and nut fit tightly, effectively preventing the stud and nut from loosening, and also providing a sealing effect. In the assembly process of cylindrical batteries, after the stud and nut are connected, welding is not required, simplifying the process, reducing equipment investment, and lowering costs.

[0011] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 .

[0013] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 1 .

[0014] Figure 3 This is a schematic diagram of the collector plate and studs.

[0015] Figure 4 This is a schematic diagram of the nut's structure.

[0016] Figure 5 This is a cross-sectional structural diagram of a nut.

[0017] Among them, 1. stud, 2. nut, 3. battery housing, 4. collector plate, 5. collector plate insulating pad, 6. insulating positioning rubber ring, 7. sealing rubber ring, 8. nut insulating pad, 9. tapered hole, 10. opening, 11. connecting platform, 12. tapered column, 13. threaded hole. Detailed Implementation

[0018] like Figures 1 to 5 As shown, an electrode post includes a stud 1 and a nut 2 that mates with the stud 1. The bottom of the stud 1 is connected to a collector plate 4. A tapered hole 9 is formed at the top of the stud 1. The diameter of the tapered hole 9 gradually decreases from the top to the bottom of the stud 1. At least one opening 10 is formed on the side wall of the stud 1, and the opening 10 communicates with the tapered hole 9. Preferably, there are one, two, three, or four openings 10. A threaded hole 13 is formed on one side of the nut 2. A tapered post 12 is formed at the bottom of the threaded hole 13. The nut 2 has a one-sided open structure. The diameter of the tapered post 12 gradually decreases in the direction towards the outside of the threaded hole 13. The tapered post 12 mates with the tapered hole 9. The maximum diameter of the tapered post 12 is greater than the maximum inner diameter of the tapered hole 9, and the height of the tapered post 12 is less than or equal to the depth of the tapered hole 9. When the nut 2 is threadedly connected to the stud 1, the tapered stud 12 will gradually insert into the tapered hole 9 as the nut 2 rotates. As the depth of the tapered stud 12 inserted into the tapered hole 9 increases, the tapered stud 12 will exert pressure on the side wall of the tapered hole 9, thereby causing the side wall of the tapered hole 9 to expand outward, so that the thread of the stud 1 is tightly attached to the thread of the nut 2, making the stud 1 and the nut 2 fit tightly together, which can effectively prevent the stud 1 and the nut 2 from loosening. At the same time, the tight fit between the stud 1 and the nut 2 can also play a sealing role.

[0019] It should be noted that this application does not specifically limit the height, maximum diameter, depth, and maximum inner diameter of the tapered column 12. In actual use, for those skilled in the art, any setting of the tapered column 12 and the tapered hole 9 that allows the tapered column 12 to be inserted into the tapered hole 9 when the nut 2 is tightened on the stud 1 can realize this application.

[0020] In some embodiments, such as Figure 1 As shown, the tapered hole 9 is a tapered blind hole, or, as... Figure 2 As shown, the tapered hole 9 penetrates the manifold 4. When the tapered hole 9 penetrates the manifold 4, it can also be used as an injection hole.

[0021] In some embodiments, the stud 1 has a connecting platform 11 at its bottom, and the connecting platform 11 is connected to the collector plate 4.

[0022] A cylindrical battery terminal structure includes the aforementioned terminal, a battery housing 3, an insulating component, a sealing ring 7, and a nut insulating pad 8. The battery housing 3 has a terminal through hole, a current collector 4 is built into the battery housing 3, and a stud 1 extends through the terminal through hole to the outside of the battery housing 3. The insulating component is used to insulate the battery housing 3 from the current collector 4 and the stud 1. The sealing ring 7 is sleeved on the stud 1 and is used to seal between the battery housing 3 and the stud 1. The nut 2 is located on the outside of the battery housing 3 and connected to the stud 1. The nut insulating pad 8 is disposed between the nut 2 and the battery housing 3.

[0023] In some embodiments, the insulating assembly includes a current collector insulating pad 5 and an insulating positioning ring 6. The current collector insulating pad 5 is disposed between the current collector 4 and the battery housing 3, and the insulating positioning ring 6 is sleeved on the outside of the stud 1 and located between the stud 1 and the battery housing 3.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0025] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly 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, an electrical connection, or a connection that allows communication between them; 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0028] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. An electrode post, characterized in that: The device includes a stud and a nut for use with the stud. The bottom of the stud is connected to a manifold, and the top of the stud has a tapered hole with a diameter that gradually decreases from the top to the bottom. The side wall of the stud has at least one notch. The nut has a threaded hole on one side, and the bottom of the threaded hole has a tapered post with a diameter that gradually decreases from the outside of the threaded hole. The tapered post is used in conjunction with the tapered hole, and the maximum diameter of the tapered post is greater than the maximum inner diameter of the tapered hole. The height of the tapered post is less than or equal to the depth of the tapered hole.

2. The pole post according to claim 1, characterized in that: The tapered hole is a tapered blind hole, or the tapered hole penetrates the manifold.

3. The pole post according to claim 1, characterized in that: The stud has a connecting platform at its bottom, which is connected to the collector plate.

4. A cylindrical battery terminal structure, characterized in that: The battery casing includes the terminal post as described in any one of claims 1-3, and further includes a battery housing, an insulating component, a sealing ring, and a nut insulating gasket. The battery housing has a terminal post through hole, the current collector is built into the battery housing, the stud extends through the terminal post through hole to the outside of the battery housing, the insulating component is used to insulate the battery housing from the current collector and the stud, the sealing ring is used to seal between the battery housing and the stud, the nut is located on the outside of the battery housing and connected to the stud, and the nut insulating gasket is disposed between the nut and the battery housing.

5. The cylindrical battery terminal structure according to claim 4, characterized in that: The insulating assembly includes a current collector insulating pad and an insulating positioning ring. The current collector insulating pad is disposed between the current collector and the battery housing, and the insulating positioning ring is sleeved on the outside of the stud and located between the stud and the battery housing.

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