Current-carrying terminal

Abstract

The utility model relates to a current-carrying terminal. The current-carrying terminal comprises a first connecting piece, a second connecting piece assembled with the first connecting piece in a split mode, a first plating layer wrapping the first connecting piece, and a second plating layer wrapping the periphery of the first plating layer on the contact part. The contact resistance of the second plating layer is smaller than that of the first plating layer. The first connecting piece and the second connecting piece can be prepared by adopting different processes, so that the loss of production materials is reduced, and the production cost is reduced. The contact performance of the current-carrying terminal is improved through the second plating layer, the corrosion resistance of the first connecting piece is improved through the first plating layer, the second plating layer is stably attached to the first plating layer through the attachment performance of the first plating layer, and the second plating layer is prevented from being scraped off in the plugging and unplugging process. The first connecting piece and the second connecting piece are assembled in a split mode, the second connecting piece does not need to be electroplated together with the first connecting piece, the first connecting piece is electroplated through the continuous plating technology, and the requirement that only the contact part is electroplated with the second plating layer can be met.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a current-carrying terminal. Background Art

[0002] At present, the terminals in the charging seat of new energy vehicles are made by machining technology. In actual production, there are disadvantages such as many consumables, long processing time, only overall replacement in case of failure, high terminal production cost, and unfavorable cost control of the charging seat when the terminals are made by machining technology. In order to improve the contact performance at the terminal spring clip, it is necessary to silver plate the spring clip. Since the machined terminals are scattered, it is impossible to use a continuous plating process for electroplating, and the spring clips on the terminals will collide with each other during the roller plating process and deform, affecting the terminal performance. Therefore, the machined terminals are generally electroplated by rack plating. The rack plating process generally uses manual installation or tying of the machined terminals one by one on the hanging fixture, which has the disadvantages of long time, low production efficiency, and high cost. In addition, the rack plating process will not only silver plate the spring clip, but also silver plate the position outside the spring clip, resulting in too high a silver plating cost, which cannot meet the demand for silver plating only at the spring clip position. Utility Model Content

[0003] The purpose of the present application is to provide a current-carrying terminal, which can solve the problems of machined terminals, such as large number of consumables, long processing time, only overall replacement when problems occur, high terminal production cost, and the problem of machined terminal plating, such as long time consumption, low production efficiency, high cost, and inability to meet the demand for silver plating only at the spring position.

[0004] In order to solve the above problems, the present application provides a current-carrying terminal, which has a first direction and includes: a first connecting member, which includes a first body and a plurality of spring plates arranged at one end of the first body, the first body extends along the first direction, and the plurality of spring plates are arranged at intervals along the circumference of the first body, each spring plate includes a contact portion and a non-contact portion connected between the contact portion and the first body; a second connecting member, which is assembled separately from the first connecting member, and the second connecting member and the first connecting member are arranged along the first direction; a first plating layer, which covers the first connecting member; and a second plating layer, which covers the outer periphery of the first plating layer on the contact portion; wherein the contact resistance of the second plating layer is less than the contact resistance of the first plating layer.

[0005] The first connector and the second connector of the current-carrying terminal of the present application are assembled separately, and can be partially replaced when the current-carrying terminal fails. Different processes can also be used to prepare the first connector and the second connector. Compared with the current-carrying terminal made by machining process, the loss of production materials of the current-carrying terminal can be reduced, the production working hours of the current-carrying terminal can be shortened, the production efficiency of the current-carrying terminal can be improved, and the production cost of the current-carrying terminal can be reduced.

[0006] In this application, a continuous plating process is used to coat a first plating layer on the first connecting member, and a second plating layer is coated on the outer periphery of the first plating layer on the contact portion by a continuous plating process. The second plating layer is used to improve the contact performance of the current-carrying terminal, the first plating layer is used to improve the corrosion resistance of the first connecting member, and due to the excellent adhesion performance of the first plating layer, the second plating layer is stably attached to the first plating layer, preventing the second plating layer from being scraped off during the plugging and unplugging process.

[0007] The first connecting member and the second connecting member of the current-carrying terminal in this application are assembled separately. The second connecting member does not need to be electroplated together with the first connecting member and can be electroplated separately. The first connecting member is electroplated by a continuous plating process, which can meet the requirement of electroplating only the second plating layer on the contact portion. When using the second plating layer to improve the contact performance of the current-carrying terminal, the coverage area of the second plating layer on the current-carrying terminal is reduced, thereby reducing the electroplating cost of the current-carrying terminal. Description of the Drawings

[0008] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0009] Figure 1 is a schematic structural diagram of the current-carrying terminal according to an embodiment of this application;

[0010] Figure 2 is an exploded view of the current-carrying terminal according to an embodiment of this application;

[0011] Figure 3 of Figure 1 is a schematic A-A cross-sectional view of ;

[0012] Figure 4 is Figure 3 is an enlarged view of the dashed box C of ;

[0013] Figure 5 is a schematic structural diagram of the second connecting member and the third plating layer according to an embodiment of this application;

[0014] Figure 6 is a schematic structural diagram of the first connecting member before forming the first plating layer and the second plating layer according to an embodiment of this application.

[0015] Description of the Reference Numerals:

[0016] 100, current-carrying terminal;

[0017] 1, first connecting member; 2, second connecting member; 3, first plating layer; 4, second plating layer; 5, third plating layer; 6, sealing ring;

[0018] 11. First body; 12. Elastic piece; 111. Central axis; 121. Contact part; 122. Non-contact part; 1211. First surface; 1212. Second surface; 123. The side surface;

[0019] 21. Wiring part; 22. Connecting part; 23. Second body; 231. First end; 232. Second end; 233. Step surface. Detailed implementation manner

[0020] The following combines the accompanying drawings of the specification to detail the preferred embodiments of the present application, so as to fully introduce the technical content of the present application to those skilled in the art, to prove by example that the present application can be implemented, to make the technical content disclosed in the present application clearer, and to make it easier for those skilled in the art to understand how to implement the present application. However, the present application can be embodied in many different forms of embodiments, and the protection scope of the present application is not limited to the embodiments mentioned in the text. The description of the following embodiments is not used to limit the scope of the present application.

[0021] The directional terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side surface", etc., are only the directions in the drawings. The directional terms used in this article are used to explain and illustrate the present application, rather than to limit the protection scope of the present application.

[0022] In the drawings, components with the same structure are denoted by the same numerical reference numerals, and components with similar structures or functions everywhere are denoted by similar numerical reference numerals. In addition, for the sake of easy understanding and description, the dimensions and thicknesses of each component shown in the drawings are arbitrarily shown, and the present application does not limit the dimensions and thicknesses of each component.

[0023] Embodiment 1

[0024] Please refer to Figures 1 - 5 , Figure 1 is a schematic structural diagram of the current-carrying terminal according to an embodiment of the present application; Figure 2 is an exploded schematic diagram of the current-carrying terminal according to an embodiment of the present application; Figure 3 of Figure 1 A-A cross-sectional schematic diagram; Figure 4 is Figure 3 an enlarged schematic diagram of the dashed box B in; Figure 5 is a schematic structural diagram of the second connecting piece and the third plating layer according to an embodiment of the present application. This embodiment provides a current-carrying terminal 100. The current-carrying terminal 100 has a first direction M, and the current-carrying terminal 100 includes a first connecting piece 1, a second connecting piece 2, a first plating layer 3, a second plating layer 4, a third plating layer 5, and a sealing ring 6.

[0025] Please refer to Figures 1 - 5, the first connecting member 1 includes: a first body 11 and a plurality of elastic pieces 12. In this embodiment, the material of the first connecting member 1 is copper alloy. In other embodiments, the first connecting member 1 can also be made of other conductive materials.

[0026] Among them, the first body 11 extends along the first direction M. Specifically, the first body 11 is circular ring-shaped, the first body 11 has a central axis 111, and the central axis 111 of the first body 11 extends along the first direction M.

[0027] Among them, the plurality of elastic pieces 12 are arranged at one end of the first body 11 away from the second connecting member 2, and the plurality of elastic pieces 12 are arranged at intervals along the circumferential direction of the first body 11. Specifically, the plurality of elastic pieces 12 are arranged at intervals along the circumferential direction of the central axis 111. Each elastic piece 12 includes a contact portion 121 and a non-contact portion 122 connected between the contact portion 121 and the first body 11. Figure 2 and Figure 4 In, a dividing line B is used to distinguish the contact portion 121 and the non-contact portion 122. Among them, the contact portion 121 is in direct contact with a male terminal such as a charging gun, and the non-contact portion 122 is not in direct contact with a male terminal such as a charging gun.

[0028] Among them, the ratio range of the size of the contact portion 121 in the first direction M to the size of the elastic piece 12 in the first direction M is 25%-35%, and the size range of the contact portion 121 in the first direction M is 6mm-10mm. In this embodiment, the ratio of the size of the contact portion 121 in the first direction M to the size of the elastic piece 12 in the first direction M is 30%, and the size of the contact portion 121 in the first direction M is 8mm.

[0029] Please refer to Figures 1 - 5 , the second connecting member 2 is assembled separately from the first connecting member 1. The first connecting member 1 and the second connecting member 2 are arranged along the first direction M. It should be noted that the second connecting member 2 being assembled separately from the first connecting member 1 means that the first connecting member 1 and the second connecting member 2 are originally two independent components, and are subsequently detachably connected or fixedly connected together. In this embodiment, the material of the second connecting member 2 is copper alloy. In other embodiments, the second connecting member 2 can also be made of other conductive materials.

[0030] The second connecting member 2 of the present application is assembled separately from the first connecting member 1. When the current-carrying terminal 100 fails, it can be partially replaced. The first connecting member 1 and the second connecting member 2 can also be prepared by different processes. Compared with the integral current-carrying terminal made by machining process in the prior art, the loss of production materials of the current-carrying terminal 100 can be reduced, the production man-hours of the current-carrying terminal 100 can be shortened, the production efficiency of the current-carrying terminal 100 can be improved, and the production cost of the current-carrying terminal 100 can be reduced. Specifically, in this embodiment, the first connecting member 1 is made by stamping process, and the second connecting member 2 is made by cold heading process. In other embodiments, the first connecting member 1 can also be made by stamping process, and the second connecting member 2 can be made by machining process.

[0031] Please refer to Figure 1 and Figure 3 , at least a part of the second connecting member 2 is embedded in the first body 11. In some embodiments, the first connecting member 1 can be connected to the second connecting member 2 by riveting process, or by welding process, or by both riveting process and welding process.

[0032] Please refer to Figure 2 , Figure 3 and Figure 5 , the second connecting member 2 includes: a wiring portion 21, a connecting portion 22, and a second body 23.

[0033] Wherein, the wiring portion 21 is connected to a wire (not shown in the figure). Inside a new energy vehicle, one end of the wire is electrically connected to the wiring portion 21, and the other end of the wire is electrically connected to a battery pack (not shown in the figure).

[0034] Wherein, the connecting portion 22 is arranged at one end of the wiring portion 21 close to the first connecting member 1.

[0035] Among them, the second body 23 is disposed at one end of the connecting portion 22 close to the first connecting member 1. The second body 23 includes: a first end portion 231 and a second end portion 232. The second end portion 232 is disposed on a side of the first end portion 231 away from the connecting portion 22. The second end portion 232 is embedded in the first body 11, and the outer diameter of the second end portion 232 is less than or equal to the inner diameter of the first body 11. It should be noted that the outer diameter of the second end portion 232 being less than or equal to the inner diameter of the first body 11 here means that after the second end portion 232 is embedded in the first body 11, the outer diameter of the second end portion 232 is less than or equal to the inner diameter of the first body 11. Specifically, when the first connecting member 1 can be connected to the second connecting member 2 by a riveting process, before the second end portion 232 is embedded in the first body 11, the outer diameter of the second end portion 232 is greater than the inner diameter of the first body 11, and after the second end portion 232 is embedded in the first body 11, the outer diameter of the second end portion 232 is equal to the inner diameter of the first body 11. When the first connecting member 1 is connected to the second connecting member 2 by a welding process, before and after the second end portion 232 is embedded in the first body 11, the outer diameter of the second end portion 232 is less than or equal to the inner diameter of the first body 11, so that the second end portion 232 can be conveniently embedded in the first body 11.

[0036] Please refer to Figure 2 、 Figure 3 and Figure 5 , the outer diameter of the second end portion 232 is less than the outer diameter of the first end portion 231, and a stepped surface 233 is formed at the connection between the first end portion 231 and the second end portion 232. The first body 11 abuts against the stepped surface 233. It should be noted that since a third coating layer 5 is provided on the outer periphery of the second connecting member 2, the first body 11 abutting against the stepped surface 233 means that the first body 11 abuts against the third coating layer 5 on the stepped surface 233. The outer peripheral surface of the first body 11 is flush with the outer peripheral surface of the first end portion 231. In this embodiment, the outer diameter of the first body 11 is the same as the outer diameter of the first end portion 231, and the central axis 111 of the first body 11 coincides with the central axis of the first end portion 231, so that the outer peripheral surface of the first body 11 is flush with the outer peripheral surface of the first end portion 231. When the first connecting member 1 and the second connecting member 2 are welded and connected, the outer peripheral surface of the first body 11 being flush with the outer peripheral surface of the first end portion 231 can facilitate welding.

[0037] Please refer to Figure 2 、 Figure 3 and Figure 5 , the outer diameter of the first end portion 231 is less than the outer diameter of the connecting portion 22, so that the connecting portion 22 can be used to limit the current-carrying terminal 100 in the charging base.

[0038] Among them, the sum of the dimensions of the first end portion 231 and the second end portion 232 in the first direction M ranges from 17 mm to 23 mm, and the dimension of the second end portion 232 in the first direction M ranges from 9 mm to 15 mm. In this embodiment, the sum of the dimensions of the first end portion 231 and the second end portion 232 in the first direction M is 20 mm, and the dimension of the second end portion 232 in the first direction M is 12 mm.

[0039] Among them, the first coating layer 3 covers the first connecting member 1. Specifically, the first coating layer 3 covers the first body 11, the contact portion 121 and the non-contact portion 122. In this embodiment, the first coating layer 3 completely covers the outer peripheries of the first body 11, the contact portion 121 and the non-contact portion 122.

[0040] Please refer to Figure 6 , Figure 6 is a schematic structural diagram of the first connecting member before forming the first coating layer and the second coating layer in the embodiment of the present application. The second coating layer 4 covers the outer periphery of the first coating layer 3 on the contact portion 121. Specifically, the contact portion 121 has a first surface 1211 facing the central axis 111, a second surface 1212 facing away from the central axis 111, and a side surface 123 connecting the first surface 1211 and the second surface 1212. Among them, the first coating layer 3 and the second coating layer 4 are both provided on the first surface 1211, the second surface 1212 and the side surface 123. That is, the second coating layer 4 completely covers the outer periphery of the first coating layer 3 on the contact portion 121.

[0041] Among them, the material of the first coating layer 3 includes one or more of nickel, cadmium, manganese, zirconium, cobalt, tin, titanium, chromium, gold, zinc, tin-lead alloy, palladium and palladium-nickel alloy; the material of the second coating layer 4 includes one or more of nickel, cadmium, manganese, zirconium, cobalt, tin, titanium, chromium, gold, silver, zinc, tin-lead alloy, silver-antimony alloy, palladium, palladium-nickel alloy, graphite silver, graphene silver, hard silver and silver-gold-zirconium alloy. In this embodiment, the material of the first coating layer 3 is nickel, and the material of the second coating layer 4 is silver. Among them, the first coating layer 3 and the second coating layer 4 are made by a continuous plating process. Compared with the existing technology that the current-carrying terminal of the machining process can only be overall silver-plated by hanging plating, it can meet the requirement of electroplating the second coating layer only on the contact portion. When using the second coating layer to improve the contact performance of the current-carrying terminal, the coverage area of the second coating layer on the current-carrying terminal is reduced, thereby reducing the electroplating cost of the current-carrying terminal.

[0042] Among them, the contact resistance of the second coating layer 4 is less than that of the first coating layer 3. Therefore, the contact performance of the current-carrying terminal 100 can be improved by using the second coating layer 4, and the contact performance between the current-carrying terminal 100 and the male current-carrying terminal such as a charging gun can be improved.

[0043] Among them, the corrosion resistance of the first plating layer 3 is higher than that of the second plating layer 4. Therefore, the corrosion resistance of the current-carrying terminal 100 can be improved by using the first plating layer 3.

[0044] Among them, the adhesion performance of the first plating layer 3 is higher than that of the second plating layer 4. In this embodiment, the material of the first connecting member 1 is copper alloy. Compared with directly plating the second plating layer 4 on the elastic piece 12, due to the excellent adhesion performance of the first plating layer 3, the second plating layer 4 is stably attached to the first plating layer 3, preventing the second plating layer from being scraped off during the plugging and unplugging process of the second plating layer 4.

[0045] Please refer to Figure 2 、 Figure 3 and Figure 5 , the third plating layer 5 covers the second connecting member 2. Specifically, the third plating layer 5 covers the wiring portion 21, the connecting portion 22, and the second body 23. The corrosion resistance and contact performance of the second connecting member 2 are improved by using the third plating layer 5. Among them, the material of the third plating layer 5 includes one or more of nickel, cadmium, manganese, zirconium, cobalt, tin, titanium, chromium, gold, zinc, tin-lead alloy, palladium, and palladium-nickel alloy. In this embodiment, the material of the third plating layer 5 is nickel. Using nickel to make the third plating layer 5 can reduce the electroplating cost of the current-carrying terminal 100 compared with the prior art in which the current-carrying terminal processed by machining can only be plated with silver as a whole by hanging plating. In this embodiment, the third plating layer 5 is made on the outer periphery of the wiring portion 21, the connecting portion 22, and the second body 23 by barrel plating process. In other embodiments, the third plating layer 5 can also be made by other processes.

[0046] Please refer to Figures 1 - 3 , the sealing ring 6 is sleeved on the outer periphery of one end of the first body 11 close to the first end portion 231 and is also sleeved on the outer periphery of one end of the first end portion 231 close to the first body 11. In other words, the sealing ring is sleeved on the outer periphery of the connection position between the first body 11 and the first end portion 231. Through the sealing ring 6, the connection position between the first body 11 and the first end portion 231 can be protected, preventing water vapor from invading the first body 11 and the first end portion 231, and improving the connection performance between the first body 11 and the first end portion 231.

[0047] The above provides a detailed introduction to a current-carrying terminal provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A current-carrying terminal (100), characterized in that: The current-carrying terminal (100) has a first direction (M), and the current-carrying terminal (100) comprises: A first connecting member (1), comprising a first body (11) and a plurality of spring sheets (12) arranged at one end of the first body (11), the first body (11) extending along the first direction (M), the plurality of spring sheets (12) being arranged at intervals along the circumference of the first body (11), each of the spring sheets (12) comprising a contact portion (121) and a non-contact portion (122) connected between the contact portion (121) and the first body (11); A second connecting member (2) is assembled separately from the first connecting member (1), and the second connecting member (2) and the first connecting member (1) are arranged along the first direction (M); a first coating layer (3) covering the first connecting member (1); and a second plating layer (4) covering the outer periphery of the first plating layer (3) on the contact portion (121); Wherein, the contact resistance of the second coating layer (4) is smaller than the contact resistance of the first coating layer (3).

2. The current-carrying terminal (100) according to claim 1, characterized in that: The first body (11) has a central axis (111), and a plurality of spring pieces (12) are arranged at intervals along the circumference of the central axis (111); The contact portion (121) comprises a first surface (1211) facing the central axis (111), a second surface (1212) facing away from the central axis (111), and a side surface (123) connected between the first surface (1211) and the second surface (1212); The first coating layer (3) and the second coating layer (4) are provided on the first surface (1211), the second surface (1212) and the side surface (123).

3. The current-carrying terminal (100) according to claim 1, characterized in that: The corrosion resistance of the first coating layer (3) is higher than the corrosion resistance of the second coating layer (4).

4. The current-carrying terminal (100) according to claim 1, characterized in that: The adhesion performance of the first coating layer (3) is higher than the adhesion performance of the second coating layer (4).

5. The current-carrying terminal (100) according to claim 1, characterized in that: The second connecting member (2) is at least partially embedded in the first body (11).

6. The current-carrying terminal (100) according to claim 5, characterized in that: The second connecting member (2) comprises: A wiring portion (21) connected to a wire; A connecting portion (22) is arranged at one end of the wiring portion (21) close to the first connecting member (1); and A second body (23) is arranged at one end of the connecting portion (22) close to the first connecting member (1); The second body (23) comprises: a first end (231) and a second end (232) arranged on a side of the first end (231) away from the connecting portion (22); the second end (232) is embedded in the first body (11); and an outer diameter of the second end (232) is less than or equal to an inner diameter of the first body (11).

7. The current-carrying terminal (100) according to claim 6, characterized in that: The outer diameter of the second end portion (232) is smaller than the outer diameter of the first end portion (231); a step surface (233) is formed at the connection between the first end portion (231) and the second end portion (232); the first body (11) abuts against the step surface (233); and the outer peripheral surface of the first body (11) is flush with the outer peripheral surface of the first end portion (231).

8. The current-carrying terminal (100) according to claim 6, characterized in that: The outer diameter of the first end portion (231) is smaller than the outer diameter of the connecting portion (22).

9. The current-carrying terminal (100) according to claim 6, characterized in that: Also includes: The third coating layer (5) covers the second connecting member (2).

10. The current-carrying terminal (100) according to claim 6, characterized in that: The current-carrying terminal (100) further comprises: The sealing ring (6) is sleeved on the outer circumference of one end of the first body (11) close to the first end (231), and is sleeved on the outer circumference of one end of the first end (231) close to the first body (11).

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