Low contact resistance connector for transmitting large current
By designing conical pins and jacks, combined with elastic wire twisted conductors and insulating materials, the problem of existing connectors with large contact resistance during high current transmission is solved, and higher contact area and positive pressure are achieved, reducing the Joule heat and electricity waste have increased current carrying capacity.
Patent Information
- Application Number
- CN202411438501.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2024-12-27
AI Technical Summary
When existing connectors transmit large currents, the contact resistance of the pins and jacks is large, resulting in Joule heat generation, increased temperature rise, limited current carrying capacity and waste of electricity.
A low-contact resistance connector is designed, using tapered pins and jacks, combined with elastic wire twisted conductors and insulating materials, which generates elastic deformation through tightening torque, increases the positive pressure on the contact surface and reduces the contact resistance.
It effectively reduces the resistance generated by the contact between the pin and the jack, increases the contact area and the applied positive pressure, reduces the temperature rise and power waste of the connector, and increases the current carrying capacity.
Smart Images
Figure CN119209063A_ABST
Abstract
Description
Technical Field
[0001] The present invention mainly relates to the technical field of electrical connectors, and in particular to a low contact resistance connector for transmitting large currents. Background Art
[0002] In recent years, with the large-scale popularization and development of new energy vehicles, the scenarios of large current transmission have gradually increased. In some application scenarios, it is necessary to frequently establish new current transmission paths or disconnect existing current transmission paths. Connectors that can transmit large currents are an effective means to solve this problem. The connection between the socket and the pin in the current connector is mostly line contact or point contact, and the positive pressure of the contact part is provided by the elasticity of the material in the pin or socket itself. The positive pressure is generally small, which leads to a relatively large on-resistance of the contact part between the pin and the socket. When transmitting large current, a large amount of Joule heat will be generated at the contact part of the pin and the socket, resulting in a large temperature rise of the connector itself, which limits the current carrying capacity of the connector itself and also wastes more electrical energy. Summary of the invention
[0003] The purpose of the present invention is to provide a low contact resistance connector for transmitting large current, so as to solve the problem of large contact resistance of the traditional connector for transmitting large current after the pin and the socket are connected.
[0004] To achieve the above object, the present invention provides a low contact resistance connector for transmitting large current, including a plug and a socket; The plug includes a pin, a fixing ring, an isolating ring, a plug shell, a base, a colloid fixing the isolating ring, and a metal conductor. The head of the pin is conical and connected to the metal conductor. The fixing ring is crimped on the metal conductor and fixed. The isolating ring is sleeved on the tail of the fixing ring. The plug shell is clamped on the isolating ring and the head of the plug shell is provided with an internal thread. The base is fixed inside the plug shell and penetrated by the pin. The socket comprises a jack, a socket shell, a colloid, and a metal conductor. The head of the jack has a conical pit and the tail is connected to the metal conductor. The head of the socket shell is provided with an external thread. The jack is arranged on a side of the socket shell with the external thread. The jack is fixed in the socket shell by the colloid. The internal thread of the plug shell and the external thread of the socket shell are of the same size and can be butt-connected and locked. The cone of the pin head can contact the conical pit surface of the jack head to achieve electrical connection.
[0005] Furthermore, the conical taper of the head of the pin is the same as the conical pit taper of the head of the socket.
[0006] Furthermore, the conical taper of the head of the pin and the conical pit taper of the head of the jack are less than .
[0007] Furthermore, the metal conductor in the plug and the metal conductor in the socket are elastic metal wire twisted conductors.
[0008] Furthermore, the inner surface of the socket housing is coated with insulating material.
[0009] Furthermore, the isolation ring is made of insulating material.
[0010] Furthermore, the colloid for fixing the isolation ring is filled in the gap between the isolation ring and the metal conductor in the plug.
[0011] Furthermore, the colloid in the socket is potted in the gap between the socket shell and the metal conductor in the socket.
[0012] The present invention provides a low contact resistance connector for transmitting large currents. Under the extrusion of the pin and the fixing ring, the conductor structure between the plug and the socket will undergo elastic deformation. The conductor that transmits large currents generally has a large cross-sectional area. Under a large tightening torque, the elastic deformation will generate a large force, which acts on the pin, so that there is a large positive pressure on the contact surface between the pin and the socket. At this time, the pin and the socket are in surface contact, and there is a large positive pressure on the contact surface. The taper of the pin head is less than According to the force decomposition, the positive pressure on the contact surface of the pin and the socket will be greater than the force acting on the pin due to the elastic deformation of the conductor structure. Compared with traditional line contact or point contact and smaller positive pressure, the invention has greatly improved the contact area and the positive stress applied to the contact surface, which can effectively reduce the contact resistance generated by the connection between the pin and the socket. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a cross-sectional view of the plug of a low contact resistance connector that transmits high current; Figure 2 It is a cross-sectional view of the socket of a low contact resistance connector that transmits high current; Figure 3 It is a cross-sectional view of a low contact resistance connector that transmits high current; Figure 4 is an isometric view of a plug of a low contact resistance connector that transmits high current; Figure 5 An isometric view of a socket for a low contact resistance connector that transmits high current.
[0015] Description of reference numerals: Among them: 101 is a pin; 102 is a fixing ring; 103 is an isolating ring; 104 is a plug shell; 105 is a base; 106 is a colloid that fixes the isolating ring; 107 is a metal conductor in the plug; 201 is a jack; 202 is a socket shell; 203 is a colloid in the socket; 204 is a metal conductor in the socket. DETAILED DESCRIPTION
[0016] The preferred mechanism and implementation method of the present invention are further described below in conjunction with the accompanying drawings and specific implementation methods. Example
[0017] like Figures 1 to 5 As shown, an embodiment of the present invention discloses a technical solution of a low contact resistance connector for transmitting large current. The low contact resistance connector for transmitting large current includes a plug 1 and a socket 2. Figure 1 The plug of the low contact resistance connector for transmitting large current is a cross-sectional view. The plug 1 includes a pin 101 made of high-conductivity metal, with a conical head and connected to a multi-strand metal wire twisted conductor 107, and the surface of the pin is plated with an anti-oxidation material; a metal fixing ring 102, an insulating material isolation ring 103, a plug shell 104 with an internal thread on the head, a base 105, and a colloid 106 for fixing the isolation ring; Figure 2 It is a cross-sectional view of a socket of a low contact resistance connector for transmitting large currents. The socket 2 includes a jack 201 with a conical pit on the head and connected to a multi-strand metal wire twisted conductor 204. The surface of the jack 201 has a unique anti-oxidation material, the inner surface of the jack is sprayed with an insulating material and the head has an external threaded socket shell 202, and a colloid 203 that fixes the socket shell and the jack together.
[0018] In the plug 1, the fixing ring 102 is crimped onto the multi-strand metal wire twisted conductor 107 and is fixed thereon and is at a certain distance from the tail end of the pin 101; the isolating ring 103 is stuck outside the fixing ring, and a colloid 106 is poured into the gap between the isolating ring 103 and the conductor 107. The main function of the isolating ring 103 is to prevent the plug housing 104 and the multi-strand metal wire twisted conductor 107 from being conductive. The plug housing 104 is stuck outside the isolating ring 103 and the housing can rotate. The base 105 is fixed inside the plug housing 104 and can rotate with the housing.
[0019] In the socket 2, the jack 201 is stuck on the socket shell 202, and the colloid 203 is poured in the gap between the socket shell 202 and the multi-strand metal wire stranded conductor 204. The taper of the head of the pin 101 is the same as the taper of the conical pit of the head of the jack 201.
[0020] When the plug 1 is connected to the socket 2, the plug shell 104 is screwed onto the socket shell 202. As the contact length of the thread increases, the conical head of the pin 101 is inserted into the conical pit of the jack 201, and further the outer surface of the conical head of the pin 101 is in contact with the surface of the conical pit of the head of the jack 201. The structure of the conductor 107 formed by twisting multiple metal wires has a certain elasticity. When the plug shell 104 is further screwed onto the socket shell 202, the tail of the plug shell 104 starts to push the isolation ring 103, the fixing ring 102, the multiple metal wire twisted conductor 1 07. Pin 101 moves toward socket 2; pin 101 has already contacted socket 201 and cannot move toward the socket. The conductor structure between the plug and socket will be elastically deformed under the pressure of pin 101 and fixing ring 102. Conductors that transmit large currents generally have large cross-sectional areas. Under a large tightening torque, this elastic deformation will generate a large force, which acts on pin 101, causing a large positive pressure on the contact surface between pin 101 and socket 201. At this time, the pin and socket are in surface contact, and there is a large positive pressure on the contact surface. The taper of the pin head is less than According to the force decomposition, the positive pressure on the contact surface of the pin and the socket will be greater than the force acting on the pin due to the elastic deformation of the conductor structure. At this time, a reliable electrical connection is established between the pin 101 of the plug 1 and the socket 201 of the socket 2. When the connection needs to be disconnected, it can be achieved by loosening the connecting thread between the plug 1 and the socket 2 and further disconnecting the threaded connection.
[0021] The present invention solves the problem that the on-resistance of the contact part between the pin and the socket in the prior art is relatively large, and when transmitting large current, a large amount of Joule heat will be generated at the contact part between the pin and the socket, resulting in a large temperature rise of the connector itself, limiting the current carrying capacity of the connector itself, and also wasting a lot of electric energy. The present invention provides a low contact resistance connector for transmitting large current. Compared with traditional line contact or point contact and smaller positive pressure, the invention has greatly improved the contact area and the positive stress applied to the contact surface, and can effectively reduce the contact resistance generated by the connection between the pin and the socket.
[0022] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A low contact resistance connector for transmitting large current, characterized in that: Including plugs and sockets; The plug includes a pin, a fixing ring, an isolating ring, a plug shell, a base, a colloid fixing the isolating ring, and a metal conductor. The head of the pin is conical and connected to the metal conductor. The fixing ring is crimped on the metal conductor and fixed. The isolating ring is sleeved on the tail of the fixing ring. The plug shell is clamped on the isolating ring and the head of the plug shell is provided with an internal thread. The base is fixed inside the plug shell and penetrated by the pin. The socket comprises a jack, a socket shell, a colloid, and a metal conductor. The head of the jack has a conical pit and the tail is connected to the metal conductor. The head of the socket shell is provided with an external thread. The jack is arranged on a side of the socket shell with the external thread. The jack is fixed in the socket shell by the colloid. The internal thread of the plug shell and the external thread of the socket shell are of the same size and can be butt-connected and locked. The cone of the pin head can contact the conical pit surface of the jack head to achieve electrical connection.
2. The low contact resistance connector for transmitting large current according to claim 1, characterized in that: The conical taper of the head of the pin is the same as the conical pit taper of the head of the socket.
3. The low contact resistance connector for transmitting large current according to claim 2, characterized in that: The conical taper of the head of the pin and the conical pit taper of the head of the socket are less than .
4. The low contact resistance connector for transmitting large current according to claim 1, characterized in that: The metal conductor in the plug and the metal conductor in the socket are elastic metal wire twisted conductors.
5. The low contact resistance connector for transmitting large current according to claim 1, characterized in that: The inner surface of the socket shell is coated with insulating material.
6. The low contact resistance connector for transmitting large current according to claim 1, characterized in that: The material of the isolation ring is insulating material.
7. The low contact resistance connector for transmitting large current according to claim 1, characterized in that: The colloid that fixes the isolating ring is potted in the gap between the isolating ring and the metal conductor in the plug.
8. The low contact resistance connector for transmitting large current according to claim 1, characterized in that: The colloid in the socket is potted in the gap between the socket shell and the metal conductor in the socket.