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CN-224232943-U - Low-resistance conductive joint

CN224232943UCN 224232943 UCN224232943 UCN 224232943UCN-224232943-U

Abstract

The utility model discloses a low-resistance conductive connector, and relates to the field of electrical equipment. The low-resistance conductive connector comprises a conductive connector and conductive fillers, wherein the conductive connector comprises a first conductor, a second conductor, a nut and a bolt, a conductive terminal is fixedly arranged on the upper surface of the first conductor and is in conductive connection with the first conductor, an elastic contact is arranged in an inner hole of the conductive terminal, the elastic contact is radially elastic, the second conductor is arranged below the first conductor, the nut is in conductive connection with the second conductor, the bolt penetrates through the conductive terminal and is connected with the nut, and the conductive fillers are filled in the nut. According to the low-resistance conductive connector, the conductive path is increased, the flow guide 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.

Inventors

  • WEI XIAOHONG
  • YU YANG
  • WAN LI
  • PENG CHANGQING
  • WU JIE

Assignees

  • 江铃汽车股份有限公司

Dates

Publication Date
20260512
Application Date
20250421

Claims (10)

  1. 1. A low resistance conductive contact, comprising: conductive contact (1), the conductive contact (1) comprising: The conductive contact structure comprises a first conductor (11), wherein a conductive terminal (13) is fixedly arranged on the upper surface of the first conductor, the conductive terminal (13) is in conductive connection with the first conductor (11), an elastic contact (131) is arranged in an inner hole of the conductive terminal (13), and the elastic contact (131) has elasticity in the radial direction; A second conductor (12) disposed below the first conductor (11); A nut (14) mounted below the second conductor (12), the nut (14) being in conductive connection with the second conductor (12); a bolt (15) penetrating the conductive terminal (13) and connected to the nut (14), and the bolt (15) penetrating the elastic contact (131) and being clamped by the elastic contact (131); and the conductive filler (2) is filled in the nut (14), and the conductive filler (2) is compressed through the bottom end of the bolt (15) and tightly props against the inner wall of the nut (14) and the bottom end of the bolt (15).
  2. 2. A low-resistance conductive contact according to claim 1, characterized in that the end of the first conductor (11) is provided with a first hole (111) therethrough, and the inner bore of the conductive terminal (13) is arranged coaxially with the first hole (111).
  3. 3. A low resistance conductive contact according to claim 1, wherein the spring contact (131) is in conductive connection with the inner bore of the conductive terminal (13).
  4. 4. A low resistance conductive contact according to claim 1, wherein the end of the second conductor (12) is provided with a second hole (121) therethrough, and the nut (14) is arranged coaxially with the second hole (121).
  5. 5. The low-resistance conductive connector according to claim 4, wherein the top of the nut (14) is provided with a coupling portion (141), a flange surface (142) and a threaded hole (143), the outer diameter of the coupling portion (141) is larger than the inner diameter of the second hole (121), and the coupling portion (141) is fitted into the second hole (121) to form interference fit and conductive connection with the second hole (121).
  6. 6. A low resistance conductive contact according to claim 4, wherein the surface of the nut (14) is provided with a conductive coating and the nut (14) is conductively connected to the second conductor (12) by means of the conductive coating.
  7. 7. A low resistance conductive contact as claimed in claim 4, wherein said bolt (15) comprises: The screw rod (151) is inserted into the elastic contact (131) and is in interference fit with the elastic contact (131); the threaded section (152) is fixedly arranged at the bottom end of the screw rod (151) and is in threaded connection with the threaded hole (143), and the outer diameter of the screw rod (151) is larger than the large diameter of the threaded section (152).
  8. 8. The low-resistance conductive connector according to claim 7, wherein the screw (151) is provided with a central hole (153) and overflow holes (154) on the inner side and the outer side, respectively, and a plurality of the overflow holes (154) are circumferentially distributed on the surface of the screw (151) and are communicated with the central hole (153).
  9. 9. A low resistance conductive contact as claimed in claim 7, wherein the top head of said screw (151) is provided with an insulating layer (155).
  10. 10. A low resistance conductive contact according to claim 1, characterized in that the outer sides of the first conductor (11) and the conductive terminal (13) are fitted with a protective cover (16).

Description

Low-resistance conductive joint Technical Field The utility model relates to the technical field of electrical equipment, in particular to a low-resistance conductive joint. Background The assembled/disassembled conductive contacts in an electrical circuit typically use bolts to compress the two conductors so that the surfaces of the two conductors come into close proximity to transfer current between the two conductors. The connecting mode has the problems of larger contact resistance, larger heat is generated at the conductive joint along with the increase of current, so that the conductive joint has high temperature and the risks of interface ablation, material melting or ignition, the size and the contact area of the conductive joint need to be increased when the current carrying capacity is increased, and the size and the space are limited in practical application. The charging current of the battery pack of the electric automobile is continuously increased, and the resistance and the temperature rise of the conductive joint are required to be reduced so as to simultaneously meet the charging power and the safety. CN118676650a proposes an aluminum row connection assembly, the aluminum row connection assembly includes that aluminum row, charging seat, flexible conductor and two connection structure, charging seat and flexible conductor are connected through two connection structure at the both ends of aluminum row, connection structure includes screens casing, connection casing and limit structure, limit structure includes joint complex fixed part and cooperation portion, screens casing is located to one of cooperation portion and fixed part, another locates the connection casing, can make connection casing and screens casing fixed through the cooperation of fixed part and cooperation portion. CN118715575A proposes a curable electrical connector composition comprising at least one conductive metal and at least one curable polymer, reducing the electrical resistance between the two metal conductors and reducing the number of process steps and material wastage. In the prior art, the contact resistance of the conductive joint is larger, and along with the increase of the current passing through the conductive joint, larger heat is generated at the conductive joint, so that the temperature of the conductive joint is very high, the risks of interface ablation, material melting or ignition exist, the size and the contact area of the conductive joint need to be increased when the current carrying capacity is increased, and the size and the space are limited in practical application. The resistance of the conductive connector is increased after the surface of the conductive connector is oxidized, so that the heat generation of the conductive connector is increased, and the reliability of the conductive connector is reduced. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides the low-resistance conductive joint, which solves the problems that as the current passing through the conductive joint increases, larger heat is generated at the conductive joint, so that the temperature of the conductive joint is very high, the risk of interface ablation, material melting or ignition exists, the size and the contact area of the conductive joint need to be increased when the current carrying capacity is increased, and the size and the space are limited in practical application. The resistance of the conductive connector is increased after the surface of the conductive connector is oxidized, so that the heat generation of the conductive connector is increased, and the reliability of the conductive connector is reduced. In order to achieve the above purpose, the utility model is realized by the following technical scheme that the low-resistance conductive connector comprises: A conductive contact, the conductive contact comprising: the first conductor and the upper surface of the first conductor are fixedly provided with conductive terminals, the conductive terminals are in conductive connection with the first conductor, the inner holes of the conductive terminals are provided with elastic contacts, and the elastic contacts are radially elastic; A second conductor disposed below the first conductor; A nut mounted below the second conductor, the nut being in conductive connection with the second conductor; The bolt penetrates through the conductive terminal and is connected with the nut, and the bolt penetrates through the elastic contact and is clamped by the elastic contact; and the conductive filler is filled in the nut, is compressed through the bottom end of the bolt and is tightly abutted against the inner wall of the nut and the bottom end of the bolt. Preferably, a first hole is formed through the end of the first conductor, and the inner hole of the conductive terminal is coaxially arranged with the first hole. Preferably, the elastic contact is in conductive connection with