Conductive connection structure and power system

Abstract

The utility model discloses a kind of electrically conductive connecting structure and power system, the electrically conductive connecting structure includes first electrically conductive piece, is equipped with the first connecting hole of penetration;Second electrically conductive piece, is equipped with the second connecting hole of penetration;Inserting piece, assembly in first connecting hole and be equipped with third connecting hole, inserting piece and first electrically conductive piece are connected, inserting piece includes opposite crimping surface and embedding surface, crimping surface and second electrically conductive piece contact;Fastener, sequentially with second connecting hole and third connecting hole are provided;Among them, the material of inserting piece and second electrically conductive piece is same, to solve how to improve the technical problem of electrical mechanical stability of copper-aluminum row connecting structure.

Description

Technical Field

[0001] This utility model relates to the field of electrical connection technology, and in particular to a conductive connection structure and an electrical system. Background Technology

[0002] With the development of energy storage systems, the demand for efficient power transmission between battery modules and electrical systems is constantly increasing, leading to the widespread application of connection structures between copper and aluminum busbars. Copper busbars, due to their excellent conductivity, are often used in main circuits, while aluminum busbars, with their advantages of light weight and low cost, are widely used in the busbars or connection structures of battery modules. Therefore, in practical applications, direct connection between copper and aluminum busbars has become a common structural form.

[0003] However, due to the significant differences in material properties between copper and aluminum—copper's tensile strength, yield strength, and hardness are all significantly higher than aluminum's—aluminum busbars are more prone to plastic deformation and even creep during prolonged operation, especially in high-temperature environments or under dynamic stress conditions. The accumulation of this micro-deformation can cause previously tight bolt connections to gradually loosen, resulting in decreased contact pressure, increased contact resistance, and further leading to problems such as localized heating, ablation, and even conductivity failure.

[0004] Therefore, how to optimize the copper-aluminum connection structure to improve its electrical and mechanical stability and extend its service life has become a key technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] One objective of this invention is to provide a conductive connection structure and an electrical system, which aims to solve the technical problem of how to improve the electromechanical stability of copper-aluminum busbar connection structures.

[0006] To achieve the above objectives, the present invention provides a solution as follows: a conductive connection structure comprising a first conductive element having a through first connection hole; a second conductive element having a through second connection hole; a fitting element assembled in the first connection hole and having a third connection hole, the fitting element being connected to the first conductive element, the fitting element including opposing pressing surfaces and embedding surfaces, the pressing surfaces contacting the second conductive element; and fasteners sequentially passing through the second connection hole and the third connection hole; wherein the fitting element and the second conductive element are made of the same material.

[0007] Optionally, the material hardness of the second conductive element is greater than that of the first conductive element.

[0008] Optionally, the projection of the edge of the fastener toward the pressing surface falls within the pressing surface.

[0009] Optionally, the pressing surface is flush with the upper surface of the first conductive element.

[0010] Optionally, the fitting includes a first fitting section and a second fitting section connected to each other, and the first connecting hole includes a first sub-hole and a second sub-hole that are interconnected. The diameter of the first sub-hole is larger than the diameter of the second sub-hole. The first fitting section is disposed in the first sub-hole, and the second fitting section is disposed in the second sub-hole.

[0011] Optionally, the first fitting section is provided with a pressing surface, and the first fitting section is located on the side of the fitting member close to the second conductive member.

[0012] Optionally, in the direction perpendicular to the axis of the first connecting hole, the cross-sectional area S1 of the first fitting segment and the cross-sectional area S2 of the second fitting segment satisfy the relationship: 1.1≤S1 / S2≤1.5.

[0013] Optionally, the length H1 of the first interlocking segment and the length H2 of the second interlocking segment satisfy the relationship: 1.5H1≤H2≤2H1.

[0014] Optionally, the first conductive element has a locking groove, which is located on the inner wall of the first connecting hole. The conductive connection structure also includes an elastic element, which is located on the side of the fitting that fits the first conductive element. The elastic element engages with the locking groove to fix the fitting.

[0015] To achieve the above objectives, the present invention also provides a solution: an electrical system comprising a first electrical component, a second electrical component, and the aforementioned conductive connection structure, wherein the first electrical component is connected to a first conductive component, and the second electrical component is connected to a second conductive component.

[0016] The beneficial effects of this utility model are as follows:

[0017] Compared to existing technologies that directly fasten copper and aluminum busbars, which suffer from problems such as large differences in material hardness, uneven stress, and susceptibility to creep deformation, this application achieves direct transfer of fastening load between homogeneous materials by incorporating a fitting between the first and second conductive components and making both the fitting and the second conductive component from the same material. This significantly reduces localized stress concentration and contact surface damage caused by material mismatch. It not only effectively suppresses plastic deformation and connection loosening under high temperature, high pressure, or long-term load conditions, but also, through the structural buffering effect of the fitting, isolates the first conductive component from the main force path, improving the overall mechanical stability and durability of the connection. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a conductive connection structure provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of another conductive connection structure provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the embedding component provided in an embodiment of the present utility model;

[0022] Figure 4 This is a partial cross-sectional view of another conductive connection structure provided in this embodiment of the present invention.

[0023] Explanation of icon numbers:

[0024] 10. First conductive element; 11. First connecting hole; 111. First sub-hole; 112. Second sub-hole; 12. Locking groove; 20. Second conductive element; 21. Second connecting hole; 30. Fitting element; 31. Third connecting hole; 32. Pressing surface; 33. Embedding surface; 34. First fitting section; 35. Second fitting section; 36. Elastic element; 40. Fastener. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0027] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0028] Please see Figure 1 , Figure 1 This is a schematic diagram of a conductive connection structure provided in an embodiment of the present invention.

[0029] This utility model provides a conductive connection structure designed to solve the problems of long-term creep, loose contact, and electrical failure caused by the performance differences between two metal materials. The conductive connection structure includes a first conductive element 10, a second conductive element 20, an interlocking element 30, and a fastener 40. Through material transitions and mechanical buffering in the structure, it achieves a synergistic improvement in electrical and mechanical performance.

[0030] Specifically, the first conductive element 10 has a first connecting hole 11 extending along its thickness direction, and the second conductive element 20 also has a corresponding second connecting hole 21. A fitting 30 is assembled inside the first connecting hole 11. The fitting 30 has a cylindrical structure and fits tightly with the first connecting hole 11, forming a stable connection with the first conductive element 10 through interference fit, press-fit, or welding. The fitting 30 has a third connecting hole 31 extending axially inside for fasteners 40 to pass through. The fitting 30 has two opposing end faces: an embedding surface 33 for embedding the first conductive element 10, and a pressing surface 32 for direct contact with the second conductive element 20.

[0031] The fastener 40 passes sequentially through the second connecting hole 21 and the third connecting hole 31 of the fitting 30 from one side of the second conductive element 20. It should be noted that the fitting 30 and the second conductive element 20 are made of the same material to ensure consistent material properties of adjacent contact surfaces in the fastening load transmission path. This structure can significantly reduce local stress concentration and plastic deformation at the contact point caused by differences in material strength and hardness, thereby effectively suppressing creep under high temperature, high pressure, or long-term load conditions.

[0032] In this embodiment, the fastening force acts directly between the fitting 30 and the second conductive element 20 through this structure. Since both are made of the same material, this facilitates a uniform force distribution. The fitting 30 isolates the first conductive element 10 from direct force application, preventing localized damage or deformation mismatch caused by excessive or insufficient hardness, thus improving connection reliability. Furthermore, because the fitting 30 has a third connecting hole 31, a pressure ring, insulating gasket, or other structures can be arranged inside as needed to further enhance electrical safety and connection sealing performance.

[0033] It should be noted that the first conductive element 10 and the second conductive element 20 can be any two metal materials with good conductivity, such as copper busbars, aluminum busbars, or their alloys. When the first conductive element 10 is a copper busbar and the second conductive element 20 is an aluminum busbar, the fitting element 30 is made of the same material as the aluminum busbar, effectively alleviating the hardness gradient problem at the copper-aluminum connection. When the first conductive element 10 is an aluminum busbar and the second conductive element 20 is a copper busbar, the fitting element 30 can also be made of copper to achieve the above-mentioned technical effect. Therefore, this connection structure has good material compatibility and structural versatility, and is suitable for various dissimilar conductive metal connection applications.

[0034] In some embodiments, the material hardness of the second conductive element 20 is preferably greater than that of the first conductive element 10, in order to match the material selection of the fitting 30 and further improve the deformation control capability and contact stability of the connection structure under long-term working conditions. As mentioned above, the material of the fitting 30 is the same as that of the second conductive element 20. When the second conductive element 20 is a material with higher hardness, the pressing interface will form a "hard-to-hard" contact state. The advantage of this structural feature is that when axial pressure is applied to the fastener 40, indentation, creep, or plastic flow is less likely to occur between the hard materials, which can more effectively maintain the long-term stability of the geometry of the connection interface and the pressing stress, thereby significantly suppressing the problems of connection loosening and contact resistance increase caused by load relaxation.

[0035] In contrast, if the second conductive component 20 is made of a material with lower hardness, the connection interface will exhibit a "soft-to-soft" contact characteristic because the interlocking component 30 is also made of a soft material. Although this can achieve better fit, it is more prone to plastic deformation or local flow during long-term service, especially under high temperature and high load conditions, where soft materials are more prone to creep, leading to weakened fastening force, poor contact, and reduced electrical reliability.

[0036] Therefore, by selecting a material with a hardness higher than that of the first conductive element 10 as the second conductive element 20, not only can the structural support capacity of the second conductive element 20 be improved, but the mating element 30 that mates with it also forms a stable and deformation-resistant "hard contact interface". This structure exhibits superior resistance to loosening and contact retention under dynamic stress conditions, making it particularly suitable for copper-aluminum dissimilar connection structures under high current, long life, and high temperature conditions. For example, when the first conductive element 10 is an aluminum busbar and the second conductive element 20 is a copper busbar, copper, as a hard material, can work with the copper mating element 30 to form a high-strength, low-deformation pressing surface 32, thereby more effectively applying stable constraints to the mounting area on the aluminum busbar side and enhancing the overall mechanical and conductive properties of the connection.

[0037] In some optimized embodiments, the projection area of ​​the edge of the fastener 40 toward the pressing surface 32 falls entirely within the range of the pressing surface 32. During actual assembly, the locking force applied by the fastener 40 will act on the pressing surface 32 of the fitting 30 through its end face, and then be transmitted to the second conductive element 20 in direct contact with it. If the projection of the edge of the fastener 40 exceeds the area of ​​the pressing surface 32, the load will partially act on the area not supported by the fitting 30, easily leading to local structural suspension or uneven stress distribution, which in turn can cause problems such as indentation deformation at the connection point, uneven material extrusion, or abnormal resistance.

[0038] By ensuring that the entire edge projection of the fastener 40 is contained within the pressing surface 32, not only is it guaranteed that all axial loads are borne by the mating part 30, preventing the load from being directly applied to the exposed surface of the second conductive part 20, but it also significantly improves the uniformity of stress distribution in the contact area. Especially under high-strength fastening or long-term creep conditions, the complete support structure of the pressing surface 32 helps to avoid edge stress concentration, thereby reducing problems such as poor contact or sealing failure caused by edge warping or interface misalignment.

[0039] Furthermore, this structure facilitates thermal expansion management. During high-current operation, the fastener 40 and surrounding conductive components may experience varying degrees of thermal expansion and contraction due to temperature rise. If the edge pressing area of ​​the fastener 40 extends beyond the boundary, it may cause uncoordinated thermal stress coupling, leading to localized tensile or shear stress. By confining the pressing projection of its edge within the pressing surface 32, thermal boundary consistency can be achieved, enhancing the thermal stability of the structure.

[0040] Furthermore, in some embodiments, the pressing surface 32 is flush with the upper surface of the first conductive element 10. That is, when the fitting 30 is assembled into the connecting hole of the first conductive element 10, the side of its pressing surface 32 facing the second conductive element 20 is exactly on the same plane as the upper surface of the first conductive element 10. After the fitting 30 is assembled, its overall outer contour does not exceed the thickness boundary of the first conductive element 10, thereby forming a highly consistent and compact joint interface at the connection.

[0041] Mechanically, the pressing surface 32 is flush with the upper surface of the first conductive element 10, which helps to form a complete and continuous contact interface, avoiding the problem of partial misfitting of the fitting element 30 due to protrusion or depression, and improving the geometric stability and force uniformity of the contact surface with the second conductive element 20. At the same time, this structure facilitates the installation and positioning of the fastener 40, and can achieve stable axial force transmission when a locking force is applied, avoiding eccentric loads or contact tilting caused by height mismatch of the fitting element 30, and ensuring connection reliability.

[0042] Furthermore, in terms of electrical performance, the uniform plane formed by the crimping surface 32 and the surface of the first conductive element 10 contributes to the overall conductivity and thermal contact performance of the crimped area. This structure ensures a uniform distribution of contact resistance at the connection points, reducing the risk of localized hot spots, and is particularly suitable for the connection requirements of high-current, high-power electrical systems.

[0043] Additionally, please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of another conductive connection structure provided in an embodiment of the present invention. Figure 3This is a schematic diagram of the structure of the insert provided in an embodiment of the present invention. In some embodiments, to further improve the assembly stability and anti-dislodgement capability of the insert 30 in the first conductive member 10, the insert 30 may include a first insert segment 34 and a second insert segment 35 connected to each other. Correspondingly, the first connecting hole 11 is also designed to be composed of a first sub-hole 111 and a second sub-hole 112 that are connected to each other, wherein the diameter of the first sub-hole 111 is larger than the diameter of the second sub-hole 112, forming a stepped hole structure. During the assembly process, the first insert segment 34 is inserted into and positioned in the first sub-hole 111, and the second insert segment 35 extends further and is inserted into the second sub-hole 112, realizing segmented insertion.

[0044] Geometrically, the two mating sections of the fitting 30, in conjunction with the two-stage aperture, form a stop structure, which can achieve a self-limiting effect during assembly, preventing the fitting 30 from loosening or slipping in the axial direction, thereby improving the positioning accuracy and mechanical stability of the overall connection. In terms of structural mechanics, the segmented mating can better transmit and diffuse external fastening forces along different sections into the interior of the first conductive element 10, avoiding excessive force concentration in a single contact section and effectively extending the fatigue life and electrical stability of the connecting components.

[0045] Furthermore, in some embodiments, the first fitting segment 34 is provided with a pressing surface 32, and the first fitting segment 34 is located on the side of the fitting member 30 close to the second conductive member 20. That is, in the structure of the stepped fitting member 30, the first fitting segment 34 with a larger cross-sectional size directly faces the second conductive member 20 and forms a stable contact with the second conductive member 20 through the pressing surface 32 at its end.

[0046] Specifically, since the crimping surface 32 is the main interface for transmitting fastening loads, when the fastener 40 applies axial locking force, the pressure first acts on the crimping surface 32 and is transmitted to the second conductive component 20 through this surface. Therefore, selecting the first mating section 34 with a larger cross-sectional area to bear this crimping area helps to expand the pressure-bearing area, thereby reducing the pressure per unit area and avoiding problems such as indentation, local deformation, or metal fatigue failure under long-term service or high-load conditions. At the same time, the larger cross-section also provides higher rigidity and structural stability, making this section more suitable as a functional area that directly contacts external components, enhancing the durability of the crimping area under vibration, high temperature, or creep conditions.

[0047] Furthermore, since the first mating section 34 is in direct contact with the second conductive element 20 and its material is the same as that of the second conductive element 20, a material interface with good compatibility, consistent thermal expansion, and matching hardness can be formed on the pressing surface 32, further improving the thermal and electrical uniformity of the connection and reducing local stress concentration and uneven conductivity caused by material mismatch. In contrast, placing the second mating section 35 with a smaller cross-section on the side away from the pressing area (i.e., close to the interior of the first conductive element 10) not only simplifies the guiding insertion process during assembly but also forms a tighter mating relationship in a smaller aperture, providing good positioning and limiting effects.

[0048] In some embodiments, the ratio of the cross-sectional areas of the first fitting segment 34 and the second fitting segment 35 is explicitly defined. Specifically, in a cross-section perpendicular to the axis of the first connecting hole 11, the cross-sectional area of ​​the first fitting segment 34 is denoted as S1, and the cross-sectional area of ​​the second fitting segment 35 is denoted as S2, and the two satisfy the following relationship: 1.1≤S1 / S2≤1.5.

[0049] From an assembly guidance perspective, the main function of the second fitting section 35 is to achieve a stable insertion and prevent axial slippage. When the ratio is less than 1.1, that is, when the cross-sectional areas of the first fitting section 34 and the second fitting section 35 are close to or even smaller, the area of ​​the interface between the first fitting section 34 and the second fitting section 35 will be reduced, thereby weakening the ability of the insert to resist axial slippage.

[0050] Conversely, when this ratio exceeds 1.5, meaning the cross-sectional area of ​​the first fitting segment 34 is significantly larger than that of the second fitting segment 35, the structure will exhibit a noticeable step-like cross-sectional transition. This abrupt change can easily cause stress concentration in the transition region, becoming a potential risk point for structural fatigue or fracture, especially in environments with high-frequency mechanical vibration or large temperature cycling changes, which may lead to localized cracking inside the fitting 30 or loosening of the connector. Furthermore, an excessively small second fitting segment 35 is not conducive to forming a tight interference fit with the first conductive element 10, reducing its assembly positioning accuracy and pull-out resistance.

[0051] When the S1 / S2 ratio is controlled within the range of 1.1 to 1.5, a good balance can be achieved between the pressing strength, fitting stability, and stress equilibrium of the fitting 30. On the one hand, the slightly larger first fitting section 34 provides sufficient pressing surface area 32 and rigid support capacity, ensuring the reliability of the fastening force transmission path regardless of whether it directly bears the pressing surface 32. On the other hand, the moderate transition difference between cross-sectional areas effectively alleviates the stress concentration problem caused by structural abrupt changes. At the same time, the second fitting section 35 still maintains sufficient mating area, facilitating insertion into the connection hole of the first conductive element 10 and forming a stable limit, enhancing the anti-displacement and anti-loosening capabilities of the fitting 30 during service.

[0052] Furthermore, in some embodiments, the axial length ratio between the first fitting segment 34 and the second fitting segment 35 has been optimized. Specifically, the axial length of the first fitting segment 34 is defined as H1, and the axial length of the second fitting segment 35 is defined as H2, satisfying the following relationship: 1.5H1≤H2≤2H1.

[0053] On the one hand, the first fitting section 34 is usually used to form the pressing surface 32 or to bear the pressing force of the fastener 40. Therefore, its structure emphasizes cross-sectional stability and surface support capacity. The axial length can be appropriately controlled to avoid the component protruding too much or affecting the assembly gap. On the other hand, the second fitting section 35 is mainly embedded in the connection hole of the first conductive element 10, playing the role of guiding insertion, limiting fixation and anti-pull-out support. Therefore, its length is designed to be slightly larger than that of the first fitting section 34, which is more conducive to forming a deep insertion contact structure in the embedded state, enhancing the axial stability and vibration resistance of the connection.

[0054] When H2 is significantly less than 1.5H1, that is, the length of the second mating segment 35 is insufficient, it is easy to cause insufficient insertion depth and fail to provide sufficient embedding and fixing force. Especially under thermal expansion or mechanical impact conditions, the connector is at risk of axial loosening, displacement or falling off. At the same time, the supporting area of ​​the mating part 30 in the connection hole of the first conductive part 10 is reduced, which is not conducive to forming a good conductive and heat conduction path.

[0055] Conversely, if H2 exceeds 2H1, although axial stability can be improved, it will cause the insert 30 to be embedded too deeply inside the first conductive element 10, thereby increasing the processing difficulty and material consumption, and may also cause the insert 30 to be far away from the center of the pressing load, reducing the overall force transmission efficiency. At the same time, excessive embedding may also interfere with other functional structures or layout space inside the first conductive element 10, reducing design flexibility and system compatibility.

[0056] By controlling H2 within the range of 1.5H1 to 2H1, both assembly convenience and connection compactness can be ensured while maintaining interlocking strength. The longer second interlocking segment 35 provides sufficient contact length to form stable axial positioning and pull-out resistance, while moderately controlling its upper limit avoids structural burdens or compatibility issues caused by excessive embedding. At the same time, this proportional setting also helps to form a better "stress dispersion zone" within the connection hole, allowing the fastening load to be gradient distributed along the interlocking length direction, reducing localized concentrated forces and improving connection durability.

[0057] Additionally, please refer to Figure 4 , Figure 4This is a partial cross-sectional view of another conductive connection structure provided by an embodiment of the present invention. In some optimized embodiments, a locking groove 12 is provided on the first conductive member 10. The locking groove 12 is formed on the inner wall of the first connecting hole 11 as part of the mechanical limiting and locking structure. Simultaneously, the conductive connection structure also includes an elastic member 36, which is disposed on the side of the fitting member 30 that contacts the first conductive member 10, specifically located between the outer wall of the fitting member 30 and the inner wall of the first connecting hole 11. Through elastic expansion and engagement with the locking groove 12, the structure is fixed.

[0058] In the specific structure, the locking groove 12 can take the form of an annular groove, a local locking point, or a positioning notch, and is preset on the inner wall along the axial or circumferential direction of the connecting hole; while the elastic element 36 can take the form of an elastic clip, an elastic ring, a wave spring washer, or a metal snap ring, etc., with one end fixed to the fitting 30 and the other end having radial elasticity, so that it can be compressed as the fitting 30 is inserted during assembly, and automatically pop out after being aligned with the locking groove 12, engaging with the locking groove 12. This structure allows the fitting 30 to be smoothly guided and positioned during the insertion process, and forms a reliable limit in the locking position after completion, thereby preventing axial slippage due to external force or load changes.

[0059] This utility model also provides an electrical system comprising a first electrical component, a second electrical component, and the aforementioned conductive connection structure, for establishing a stable and reliable electrical connection between the two electrical components. Specifically, the first electrical component is electrically connected to the first conductive element 10 in the conductive connection structure, and the second electrical component is electrically connected to the second conductive element 20, thereby realizing the effective transmission of electrical energy or signals between the two electrical components.

[0060] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0061] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A conductive connection structure, characterized in that, include: The first conductive element has a through-hole; The second conductive element has a through second connection hole; A fitting is assembled in the first connecting hole and has a third connecting hole. The fitting is connected to the first conductive element. The fitting includes a pressing surface and an inserting surface, and the pressing surface contacts the second conductive element. Fasteners are sequentially inserted into the second connecting hole and the third connecting hole; The insert is made of the same material as the second conductive element.

2. The conductive connection structure according to claim 1, characterized in that, The material hardness of the second conductive element is greater than that of the first conductive element.

3. The conductive connection structure according to claim 1, characterized in that, The projection of the edge of the fastener toward the crimping surface falls within the crimping surface.

4. The conductive connection structure according to claim 1, characterized in that, The pressing surface is flush with the upper surface of the first conductive element.

5. The conductive connection structure according to claim 4, characterized in that, The fitting component includes a first fitting section and a second fitting section connected to each other. The first connecting hole includes a first sub-hole and a second sub-hole that are interconnected. The diameter of the first sub-hole is larger than the diameter of the second sub-hole. The first fitting section is disposed in the first sub-hole, and the second fitting section is disposed in the second sub-hole.

6. The conductive connection structure according to claim 5, characterized in that, The first fitting section is provided with the pressing surface, and the first fitting section is located on the side of the fitting member close to the second conductive member.

7. The conductive connection structure according to claim 5, characterized in that, In the direction perpendicular to the axis of the first connecting hole, the cross-sectional area S1 of the first fitting segment and the cross-sectional area S2 of the second fitting segment satisfy the relationship: 1.1≤S1 / S2≤1.

5.

8. The conductive connection structure according to claim 5, characterized in that, The length H1 of the first interlocking segment and the length H2 of the second interlocking segment satisfy the relationship: 1.5H1≤H2≤2H1.

9. The conductive connection structure according to any one of claims 1 to 8, characterized in that, The first conductive element has a locking groove, which is disposed on the inner wall of the first connecting hole. The conductive connection structure also includes an elastic element, which is disposed on the side of the fitting that fits the first conductive element. The elastic element engages with the locking groove to fix the fitting.

10. An electrical system, characterized in that, It includes a first electrical component, a second electrical component, and a conductive connection structure as described in any one of claims 1 to 9, wherein the first electrical component is connected to the first conductive element, and the second electrical component is connected to the second conductive element.

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