Low-resistance conductive joint

Abstract

The utility model discloses a low-resistance conductive joint, and relates to the field of electrical equipment. The low-resistance conductive joint comprises a conductive joint body and conductive filler, the conductive joint body comprises a first conductor, a second conductor, a nut and a bolt, a conductive terminal is fixedly installed on the upper surface of the first conductor, the conductive terminal is in conductive connection with the first conductor, an elastic contact is arranged in an inner hole of the conductive terminal, the elastic contact has elasticity in the radial direction, and the conductive filler is arranged in the elastic contact. The second conductor is arranged below the first conductor, the nut is conductively connected with the second conductor, the bolt penetrates through the conductive terminal and is connected with the nut, and the nut is filled with the conductive filler. According to the low-resistance conductive joint, the current-carrying capacity of the conductive joint is improved and the temperature rise of the conductive joint is reduced by increasing the conductive path, increasing the flow guide sectional area and reducing the interface resistance.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to a low-resistance conductive connector. Background Technology

[0002] In electrical circuits, prefabricated / detachable conductive joints typically use bolts to clamp two conductors together, ensuring a tight fit between their surfaces to transmit current. This connection method suffers from high contact resistance. As the current increases, significant heat is generated at the conductive joint, leading to very high temperatures and posing risks of interface erosion, material melting, or fire. Increasing current-carrying capacity requires increasing the size and contact area of ​​the conductive joint, but size and space are limited in practical applications. The continuously increasing charging current of electric vehicle battery packs necessitates reducing the resistance and temperature rise of the conductive joints to simultaneously meet charging power and safety requirements.

[0003] CN118676650A proposes an aluminum busbar connection assembly, which includes an aluminum busbar, a charging base, a flexible conductor, and two connection structures. The two ends of the aluminum busbar are connected to the charging base and the flexible conductor through the two connection structures. The connection structure includes a locking housing, a connecting housing, and a limiting structure. The limiting structure includes a locking part and a mating part, one of which is located in the locking housing and the other in the connecting housing. The connection housing and the locking housing can be fixed by the cooperation of the locking part and the mating part.

[0004] CN118715575A discloses a curable electrical connector composition comprising at least one conductive metal and at least one curable polymer, which reduces the resistance between two metal conductors and reduces the number of process steps and material waste.

[0005] In current technology, conductive joints have relatively high contact resistance. As the current flowing through the conductive joint increases, significant heat is generated at the joint, leading to very high temperatures and posing risks of interface ablation, material melting, or fire. Increasing the current-carrying capacity requires increasing the size and contact area of ​​the conductive joint, but size and space are limited in practical applications. Oxidation of the conductive joint surface further increases its resistance, increasing heat generation and reducing its reliability. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a low-resistance conductive connector, solving the problem that as the current flowing through the connector increases, significant heat is generated at the connector, leading to high temperatures and risks of interface ablation, material melting, or fire. Increasing current carrying capacity requires increasing the size and contact area of ​​the conductive connector, which is limited by space constraints in practical applications. Furthermore, surface oxidation of the conductive connector increases its resistance, further increasing heat generation and reducing its reliability.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a low-resistance conductive connector, comprising:

[0008] A conductive connector, the conductive connector comprising:

[0009] A first conductor has a conductive terminal fixedly mounted on its upper surface. The conductive terminal is electrically connected to the first conductor. An elastic contact is provided in the inner hole of the conductive terminal. The elastic contact is radially elastic.

[0010] The second conductor is positioned below the first conductor;

[0011] A nut, which is installed below the second conductor, and the nut is electrically connected to the second conductor;

[0012] A bolt that passes through a conductive terminal and is connected to a nut, and the bolt passes through an elastic contact and is clamped by the elastic contact;

[0013] A conductive filler is provided inside the nut, and the conductive filler is compressed by the bottom end of the bolt and closely abuts against the inner wall of the nut and the bottom end of the bolt.

[0014] Preferably, the end of the first conductor has a first hole through it, and the inner hole of the conductive terminal is arranged coaxially with the first hole.

[0015] Preferably, the elastic contact is electrically connected to the inner hole of the conductive terminal.

[0016] Preferably, the end of the second conductor has a second hole through it, and the nut is arranged coaxially with the second hole.

[0017] Preferably, the top of the nut is provided with a coupling part, a flange face and a threaded hole, the outer diameter of the coupling part is larger than the inner diameter of the second hole, the coupling part is inserted into the second hole to form an interference fit and conduct electricity.

[0018] Preferably, the surface of the nut is provided with a conductive plating layer, and the nut is electrically connected to the second conductor through the conductive plating layer.

[0019] Preferably, the bolt comprises:

[0020] The screw is inserted into the elastic contact and is interference-fitted with the elastic contact.

[0021] A threaded section is fixedly disposed at the bottom end of the screw and threadedly connected to the threaded hole, and the outer diameter of the screw is larger than the major diameter of the threaded section.

[0022] Preferably, the screw has a central hole and an overflow hole on its inner and outer sides, and the plurality of overflow holes are circumferentially distributed on the surface of the screw and communicate with the central hole.

[0023] Preferably, the top end of the screw is provided with an insulating layer.

[0024] Preferably, a protective cover is installed on the outside of the first conductor and the conductive terminal.

[0025] This utility model discloses a low-resistance conductive connector, which has the following beneficial effects:

[0026] 1. This low-resistance conductive connector incorporates an elastic contact within the mounting hole of the first conductor. This elastic contact establishes an electrical connection with a portion of the bolt. Simultaneously, conductive filler is introduced into the threaded hole of the nut, increasing the conductive area between the bolt and the nut. After the bolt is tightened, the conductive surfaces of the first and second conductors press against each other, forming a first conductive path. The first conductor is electrically connected to the bolt via the elastic contact, and the bolt further connects to the nut via the second conductor, thus forming a second conductive path. By increasing the conductive path, the current-carrying cross-sectional area is increased, the interface resistance is reduced, the current-carrying capacity of the conductive connector is improved, and the temperature rise of the conductive connector is reduced.

[0027] 2. This low-resistance conductive connector utilizes conductive filler to increase its heat capacity, further reducing temperature rise. The gel / gel-like conductive filler seals, encapsulates, and pots the conductive contact surface, preventing water and water vapor from penetrating the conductive surface, thus providing excellent corrosion protection. It also blocks air and oxygen from contacting the conductive surface, preventing oxidation and passivation under prolonged use or high-temperature conditions, avoiding increased contact resistance, and maintaining the conductivity reliability of the conductive interface after long-term use. Furthermore, the current-carrying capacity of the gel / gel-like conductive filler reduces heat generation and temperature rise in the conductive connector. Attached Figure Description

[0028] 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 these drawings without creative effort.

[0029] Figure 1This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the first conductor of this utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the nut of this utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the bolt of this utility model;

[0033] Figure 5 This is a schematic diagram of the assembly process of the conductive connector of this utility model. Figure 1 ;

[0034] Figure 6 This is a schematic diagram of the assembly process of the conductive connector of this utility model. Figure 2

[0035] Figure 7 This is a schematic diagram of the assembly process of the conductive connector of this utility model. Figure 3 .

[0036] In the diagram: 1. Conductive connector; 11. First conductor; 111. First hole; 12. Second conductor; 121. Second hole; 13. Conductive terminal; 131. Resilient contact; 14. Nut; 141. Coupling part; 142. Flange face; 143. Threaded hole; 15. Bolt; 151. Screw; 152. Threaded section; 153. Center hole; 154. Overflow hole; 155. Insulating layer; 16. Protective cover; 2. Conductive filler. Detailed Implementation

[0037] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0038] This utility model discloses a low-resistance conductive connector.

[0039] According to the appendix Figure 1-7 As shown, it includes:

[0040] Conductive connector 1, conductive connector 1 includes:

[0041] The first conductor 11 has a conductive terminal 13 fixedly mounted on its upper surface. The conductive terminal 13 is electrically connected to the first conductor 11. The inner hole of the conductive terminal 13 is provided with an elastic contact 131, which is radially elastic.

[0042] The second conductor 12 is disposed below the first conductor 11;

[0043] Nut 14 is installed below the second conductor 12 and is electrically connected to the second conductor 12;

[0044] Bolt 15 passes through conductive terminal 13 and is connected to nut 14, and bolt 15 passes through elastic contact 131 and is clamped by elastic contact 131;

[0045] The conductive filler 2 is filled inside the nut 14, and the conductive filler 2 is compressed by the bottom end of the bolt 15 and tightly abuts against the inner wall of the nut 14 and the bottom end of the bolt 15.

[0046] An elastic contact 131 is added inside the mounting hole of the first conductor 11, establishing an electrical connection between the elastic contact 131 and part of the bolt 15. Simultaneously, conductive filler 2 is introduced into the threaded hole 143 of the nut 14, increasing the conductive area between the bolt 15 and the nut 14. After the bolt 15 is tightened, the conductive surfaces of the first conductor 11 and the second conductor 12 are pressed together, forming a first conductive path. The first conductor 11 is electrically connected to the bolt 15 through the elastic contact 131, and the bolt 15 is further electrically connected to the second conductor 12 and the nut 14, thus forming a second conductive path. By increasing the conductive path, the current-carrying capacity of the conductive connector 1 is increased, the interface resistance is reduced, and the temperature rise of the conductive connector 1 is decreased.

[0047] The conductive filler 2 increases the heat capacity of the conductive connector 1, further reducing its temperature rise. The gel / gel-like conductive filler 2 seals, encapsulates, and pots the conductive contact surface, preventing water and water vapor from penetrating the conductive surface and providing excellent corrosion protection. It also blocks air and oxygen from contacting the conductive surface, preventing oxidation and passivation under prolonged use or high-temperature conditions, thus avoiding increased contact resistance and maintaining the conductivity reliability of the conductive interface after long-term use. Furthermore, the gel / gel-like conductive filler 2 fully fills the conductive contact area, increasing the conductive area compared to the conductor surface contact, further increasing the current-carrying capacity of the conductive connector 1 and reducing heat generation and temperature rise.

[0048] Furthermore, the end of the first conductor 11 is provided with a first hole 111, and the inner hole of the conductive terminal 13 is arranged coaxially with the first hole 111.

[0049] Furthermore, the resilient contact 131 is electrically connected to the inner hole of the conductive terminal 13.

[0050] Furthermore, a second hole 121 is provided through the end of the second conductor 12, and the nut 14 is arranged coaxially with the second hole 121.

[0051] Furthermore, the top of the nut 14 is provided with a coupling part 141, a flange face 142 and a threaded hole 143. The outer diameter of the coupling part 141 is larger than the inner diameter of the second hole 121. The coupling part 141 is inserted into the second hole 121 to form an interference fit and conduct electricity.

[0052] Furthermore, the surface of the nut 14 is provided with a conductive plating layer, and the nut 14 is electrically connected to the second conductor 12 through the conductive plating layer.

[0053] Specifically disclosed, bolt 15 includes:

[0054] The screw 151 is inserted into the elastic contact 131 and is interference-fitted with the elastic contact 131;

[0055] The threaded section 152 is fixedly disposed at the bottom end of the screw 151 and threadedly connected to the threaded hole 143, and the outer diameter of the screw 151 is larger than the major diameter of the threaded section 152.

[0056] The outer diameter of the screw 151 is larger than the major diameter of the threaded section 152. The threaded section 152 can pass through the elastic contact 131 with low resistance. The screw 151 and the elastic contact 131 are interference-fitted. The screw 151 will be clamped by the elastic contact 131 when it passes through the elastic contact 131.

[0057] Specifically disclosed, the screw 151 has a central hole 153 and an overflow hole 154 on its inner and outer sides, respectively. Multiple overflow holes 154 are distributed circumferentially on the surface of the screw 151 and are connected to the central hole 153.

[0058] Furthermore, an insulating layer 155 is provided at the top of the screw 151. The insulating layer 155 is located at the head of the screw 151 and covers the contact area during the tightening process, preventing the tightening tool from contacting the body of the bolt 15 during the assembly and disassembly process, thereby protecting the operator from accidental electric shock.

[0059] Furthermore, a protective cover 16 is installed on the outside of the first conductor 11 and the conductive terminal 13.

[0060] Before assembling bolt 15, conductive filler 2 is applied into threaded hole 143 of nut 14. Conductive filler 2 can also be applied before nut 14 is installed to second conductor 12.

[0061] The first conductor 11 is mounted above the second conductor 12; the bolt 15 passes through the conductive terminal 13, the first hole 111 and the second hole 121 and further engages with the nut 14.

[0062] After bolt 15 and nut 14 are tightened, bolt 15 presses against the first conductor 11 and the second conductor 12; the end of bolt 15 presses against the upper surface of conductive terminal 13, and the lower surface of the first conductor 11 is tightly pressed against the upper surface of the second conductor 12. The screw 151 of bolt 15 is pressure-engaged with the elastic contact 131, and at the same time, the gap between the inner hole of conductive terminal 13 and screw 151 is filled with conductive filler 2, and the surface of screw 151 is provided with a coating with good conductivity, so that conductive terminal 13 and bolt 15 establish a good electrical connection.

[0063] The threaded section 152 and the threaded hole 143 engage and lock together. The gap between the threaded section 152 of the bolt 15 and the threaded hole 143 of the nut 14 is filled with conductive filler 2, establishing a good electrical connection between the bolt 15 and the nut 14. A good electrical connection is established between the conductive terminal 13 and the first conductor 11, between the conductive terminal 13 and the bolt 15, and between the nut 14 and the second conductor 12. On the other hand, under the clamping force of the bolt 15, the lower surface of the first conductor 11 and the upper surface of the second conductor 12 are tightly pressed together, and the overlapping area of ​​the lower surface of the first conductor 11 and the upper surface of the second conductor 12 is electrically conductive with low resistance.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-resistance conductive connector, characterized in that, include: Conductive connector (1), the conductive connector (1) comprising: A first conductor (11) has a conductive terminal (13) fixedly mounted on its upper surface. The conductive terminal (13) is electrically connected to the first conductor (11). An elastic contact (131) is provided in the inner hole of the conductive terminal (13). The elastic contact (131) is radially elastic. The second conductor (12) is positioned below the first conductor (11); A nut (14) is installed below the second conductor (12) and is electrically connected to the second conductor (12); A bolt (15) passes through a conductive terminal (13) and is connected to a nut (14), and the bolt (15) passes through an elastic contact (131) and is clamped by the elastic contact (131); Conductive filler (2) is filled inside the nut (14), and the conductive filler (2) is compressed by the bottom end of the bolt (15) and closely abuts against the inner wall of the nut (14) and the bottom end of the bolt (15).

2. A low-resistance conductive connector according to claim 1, characterized in that, The first conductor (11) has a first hole (111) through its end, and the inner hole of the conductive terminal (13) is arranged coaxially with the first hole (111).

3. A low-resistance conductive connector according to claim 1, characterized in that, The elastic contact (131) is electrically connected to the inner hole of the conductive terminal (13).

4. A low-resistance conductive connector according to claim 1, characterized in that, The end of the second conductor (12) is provided with a second hole (121), and the nut (14) is arranged coaxially with the second hole (121).

5. A low-resistance conductive connector according to claim 4, characterized in that, The nut (14) has a coupling part (141), a flange face (142) and a threaded hole (143) on its top. The outer diameter of the coupling part (141) is larger than the inner diameter of the second hole (121). The coupling part (141) is inserted into the second hole (121) to form an interference fit and conduct electricity.

6. A low-resistance conductive connector according to claim 4, characterized in that, The surface of the nut (14) is provided with a conductive plating layer, and the nut (14) is electrically connected to the second conductor (12) through the conductive plating layer.

7. A low-resistance conductive connector according to claim 4, characterized in that, The bolt (15) includes: The screw (151) is inserted into the elastic contact (131) and is interference-fitted with the elastic contact (131); The threaded section (152) is fixedly disposed at the bottom end of the screw (151) and threadedly connected to the threaded hole (143), and the outer diameter of the screw (151) is greater than the major diameter of the threaded section (152).

8. A low-resistance conductive connector according to claim 7, characterized in that, The screw (151) has a central hole (153) and an overflow hole (154) on its inner and outer sides, respectively. The multiple overflow holes (154) are circumferentially distributed on the surface of the screw (151) and communicate with the central hole (153).

9. A low-resistance conductive connector according to claim 7, characterized in that, An insulating layer (155) is provided at the top end of the screw (151).

10. A low-resistance conductive connector according to claim 1, characterized in that, A protective cover (16) is installed on the outside of the first conductor (11) and the conductive terminal (13).

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