Contact assembly, relay contact, relay and automobile

Abstract

The utility model provides a contact assembly, a relay contact, a relay and an automobile, and relates to the technical field of relays. The contact assembly comprises an aluminum connecting piece, an aluminum transition piece and a copper connecting piece, the aluminum connecting piece is used for being connected with an aluminum busbar; the first end of the aluminum transition piece is connected with the aluminum connecting piece, and the second end of the aluminum transition piece is provided with a first matching part; the first end of the copper connecting piece is provided with a second matching part, the first matching part is matched and connected with the second matching part, and the second end of the copper connecting piece is used for being connected with relay ceramic. According to the contact assembly provided by the embodiment of the invention, the relay contact and the aluminum busbar can be stably connected, and the problems of high welding difficulty and unreliable connection between the aluminum busbar and the relay contact are solved.

Description

Technical Field

[0001] This application relates to the field of relay technology, and more particularly to a contact assembly, a relay contact, a relay, and an automobile. Background Technology

[0002] In electric vehicles, the electrical connection between high-voltage relays and related components such as fuses and charging resistors mainly relies on copper busbars and bolts. Specifically, bolts are used to fix the contacts of the high-voltage relays and related components to the copper busbars, which serve as the conductive medium to achieve the electrical connection.

[0003] The connection method using copper busbars and bolts suffers from problems such as unstable connections and high costs. Related technologies propose using aluminum busbars as an alternative to copper busbars, welding the contacts of the high-voltage relay to the aluminum busbars to achieve connection with relevant components.

[0004] However, the contacts of high-voltage relays are usually made of copper, and welding between aluminum busbars and copper contacts is difficult, making it hard to achieve a reliable connection. Utility Model Content

[0005] This application provides contact components, relay contacts, relays, and automobiles to solve the problem that welding between aluminum busbars and relay contacts is difficult and makes it hard to achieve a reliable connection.

[0006] In a first aspect, this application provides a contact assembly, which includes an aluminum connector, an aluminum transition member, and a copper connector;

[0007] The aluminum connector is used to connect to the aluminum busbar;

[0008] The first end of the aluminum transition piece is connected to the aluminum connector, and the second end of the aluminum transition piece is provided with a first mating part;

[0009] The first end of the copper connector is provided with a second mating part, the first mating part and the second mating part are connected in a mating manner, and the second end of the copper connector is used to connect with the relay ceramic.

[0010] As an optional implementation, the contact assembly provided in this application embodiment includes a first connecting post in the first mating portion;

[0011] The second mating part includes a first connecting groove, and the first connecting post is disposed in the first connecting groove.

[0012] As an optional implementation, the contact assembly provided in this application embodiment has an external thread on the outer peripheral surface of the first connecting post and an internal thread on the inner wall of the first connecting groove, and the first connecting post and the first connecting groove are connected by threaded engagement.

[0013] As an optional implementation, the contact assembly provided in this application embodiment has a second connecting groove at the end of the first connecting post facing the first connecting groove;

[0014] A second connecting post is provided in the first connecting groove, and the second connecting post is disposed in the second connecting groove.

[0015] As an optional implementation, the contact assembly provided in this application embodiment has an internal thread on the inner wall of the second connecting groove and an external thread on the outer circumferential surface of the second connecting post, and the second connecting post and the second connecting groove are connected by threaded engagement.

[0016] As an optional implementation, the contact assembly provided in this application embodiment has the first connecting post and the second connecting post arranged coaxially.

[0017] As an optional implementation, the contact assembly provided in this application embodiment includes an aluminum transition member comprising a first connecting cap, a first end of the first connecting cap being connected to the aluminum connector, and a first mating portion being disposed at the second end of the first connecting cap.

[0018] As an optional implementation, the contact assembly provided in this application embodiment has a retaining ring at the first end of the copper connector;

[0019] The second end of the first connecting cap is provided with a first groove;

[0020] When the first connecting post is disposed in the first connecting groove, the first end of the copper connector abuts against the second end of the first connecting cap, and the retaining ring is embedded in the first groove.

[0021] As an optional implementation, the contact assembly provided in this application embodiment has a through hole on the aluminum transition member, and the through hole extends through the aluminum transition member axially.

[0022] As an optional implementation, the contact assembly provided in this application embodiment includes a copper connector comprising a second connector cap and a third connector post connected to each other;

[0023] The first connecting groove is located at the second connecting cap, and the opening of the first connecting groove is located at the end face of the second connecting cap away from the third connecting post (310).

[0024] The third connecting post is used to connect to the relay ceramic.

[0025] As an optional implementation, the contact assembly provided in this application embodiment has a second connecting cap having a welding portion facing the third connecting post, and the welding portion being used for welding with the relay ceramic.

[0026] As an optional implementation, the contact assembly provided in this application embodiment has a second groove provided in the welding portion.

[0027] Secondly, this application provides a relay contact, which includes any of the contact components described above.

[0028] Thirdly, this application provides a relay, which includes relay ceramic and any of the relay contacts described above;

[0029] The relay contact includes a contact assembly, which is connected to the relay ceramic.

[0030] Fourthly, this application provides a vehicle that includes any of the aforementioned relays.

[0031] The contact assembly, relay contact, relay and automobile provided in the embodiments of this application include an aluminum connector, an aluminum transition member and a copper connector; the aluminum connector is used to connect with an aluminum busbar, and the copper connector is used to connect with a relay ceramic; the aluminum transition member is disposed between the aluminum connector and the copper connector, the first end of the aluminum transition member is connected to the aluminum connector, and the second end of the aluminum transition member and the copper connector are connected by at least a first mating part and a second mating part.

[0032] This contact assembly uses an aluminum transition piece as an intermediate layer to connect the aluminum connector and the copper connector. The aluminum transition piece is connected to the copper connector through a first mating part and a second mating part, providing additional mechanical connection force, enhancing connection reliability, reducing dependence on welding quality, lowering welding difficulty, and achieving a stable connection between the aluminum transition piece and the copper connector, thus ensuring the stability of the contact assembly.

[0033] The aluminum connector serves as the connection interface for the contact assembly and also constitutes the connection interface for the relay contact. It can be directly welded to the aluminum busbar, reducing the welding difficulty between the relay contact and the aluminum busbar and achieving a reliable connection between the relay and the aluminum busbar. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0035] Figure 1 This is a schematic diagram of the structure of the contact assembly provided in the embodiments of this application;

[0036] Figure 2 for Figure 1 Cross-sectional view of the middle contact component;

[0037] Figure 3 for Figure 1 Schematic diagram of the structure of the aluminum transition piece;

[0038] Figure 4 for Figure 1 Schematic diagram of the copper connector structure;

[0039] Figure 5 This is an installation state diagram of the contact assembly provided in an embodiment of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100-Aluminum connector;

[0042] 200 - Aluminum transition part; 201 - Through hole;

[0043] 210 - First connecting post; 211 - Second connecting groove;

[0044] 220 - First connecting cap; 221 - First groove;

[0045] 300 - Copper connector;

[0046] 310 - Third connecting post;

[0047] 320 - Second connecting cap; 321 - First connecting groove; 3211 - Second connecting post; 322 - Retaining ring;

[0048] 330 - Welding section; 331 - Second groove;

[0049] 80-Aluminum Busbar;

[0050] 90-Relay ceramic.

[0051] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this application.

[0053] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing the embodiments of this application and their implementations, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in the embodiments of this application can be understood according to the specific circumstances.

[0054] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0055] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0056] In this application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0057] In electric vehicles, the electrical connection between high-voltage relays and related components such as fuses and charging resistors mainly relies on copper busbars and bolts. Specifically, bolts are used to fix the contacts of the high-voltage relays and related components to the copper busbars, which serve as the conductive medium to achieve the electrical connection.

[0058] The connection method of using copper busbars and bolts may result in an unstable connection due to insufficient tightening of the bolts or insufficient residual torque, which in turn affects the stability and safety of the circuit. Furthermore, using copper busbars and bolts also leads to higher manufacturing costs.

[0059] Related technologies propose a solution to replace copper busbars with aluminum busbars, whereby the terminals (i.e., contacts) of the high-voltage relay are soldered to the aluminum busbars to achieve the connection between the high-voltage relay and related components.

[0060] However, the terminals of high-voltage relays are usually made of copper. When welding them to aluminum busbars, the large differences in the coefficients of thermal expansion and melting points between aluminum and copper can easily lead to defects such as cracks and porosity during the welding process, affecting the reliability of the connection. Therefore, special welding processes are required, which places high demands on equipment and technicians.

[0061] It is evident that welding aluminum busbars to relay contacts is quite difficult, making it hard to achieve a reliable connection.

[0062] In view of this, this application provides a contact assembly, a relay contact, a relay, and an automobile, wherein the contact assembly includes an aluminum connector, an aluminum transition member, and a copper connector; the aluminum connector is used to connect to an aluminum busbar, and the copper connector is used to connect to a relay ceramic; the aluminum transition member is disposed between the aluminum connector and the copper connector, a first end of the aluminum transition member is connected to the aluminum connector, and a second end of the aluminum transition member and the copper connector are connected by at least a first mating part and a second mating part.

[0063] This contact assembly uses an aluminum transition piece as an intermediate layer to connect the aluminum connector and the copper connector. The aluminum transition piece is connected to the copper connector through a first mating part and a second mating part, providing additional mechanical connection force, enhancing connection reliability, reducing dependence on welding quality, lowering welding difficulty, and achieving a stable connection between the aluminum transition piece and the copper connector, thus ensuring the stability of the contact assembly.

[0064] The aluminum connector serves as the connection interface for the contact assembly and also constitutes the connection interface for the relay contact. It can be directly welded to the aluminum busbar, reducing the welding difficulty between the relay contact and the aluminum busbar and achieving a reliable connection between the relay and the aluminum busbar.

[0065] Compared to traditional copper busbars and bolted connections, the contact assembly provided in this application not only improves the reliability of the connection between the relay contacts and the aluminum busbar, but also reduces the overall manufacturing cost.

[0066] The technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0067] Combination Figures 1 to 4 As shown, a first aspect of this application provides a contact assembly including an aluminum connector 100, an aluminum transition member 200, and a copper connector 300; the aluminum connector 100 is used to connect to an aluminum busbar 80; and the first end of the aluminum transition member 200 is connected to the aluminum connector 100.

[0068] It is understandable that the use of aluminum connector 100 and aluminum transition member 200 in the contact assembly provided in this application embodiment, taking advantage of the lightweight and cost advantages of aluminum, helps to reduce the overall manufacturing cost.

[0069] Meanwhile, the aluminum connector 100 is directly connected to the aluminum busbar 80, which can better adapt to the physical characteristics of the aluminum busbar 80, ensure the stability and consistency of the connection, and avoid the problem of difference in thermal expansion coefficient that may occur when copper and aluminum are directly welded.

[0070] The first end of the aluminum transition piece 200 is connected to the aluminum connector 100, and the second end of the aluminum transition piece 200 can be connected to the copper connector 300.

[0071] The aluminum transition piece 200 serves as an intermediate layer, providing a transition area between the aluminum connector 100 and the copper connector 300. This supports the mechanical connection between the two, contributing to a smoother and more stable connection. It reduces the difficulty of maintaining the connection between the aluminum connector 100 and the copper connector 300 solely through welding.

[0072] In some embodiments, the second end of the aluminum transition member 200 is provided with a first mating portion, and the first end of the copper connector 300 is provided with a second mating portion; the first end of the copper connector 300 and the second end of the aluminum transition member 200 are connected by at least the first mating portion and the second mating portion.

[0073] It should be noted that when the copper connector 300 and the aluminum transition piece 200 are connected, the first mating part and the second mating part can also be welded to ensure the stability of the connection.

[0074] The first and second mating parts provide additional mechanical connection force between the copper connector 300 and the aluminum transition piece 200 through mechanical mating, thereby enhancing the reliability of the connection.

[0075] This mechanical connection method reduces the impact of welding defects on the overall connection reliability, thus reducing reliance on welding quality and reducing welding difficulty, which helps to make the connection between the copper connector 300 and the aluminum transition piece 200 more stable.

[0076] The second end of the copper connector 300 can be connected to the relay ceramic 90. The copper connector 300 can fully utilize the advantages of copper material, taking advantage of copper's excellent conductivity and mechanical strength, to ensure a reliable connection with the relay ceramic 90, and guarantee electrical performance and structural stability.

[0077] Specifically, the contact assembly provided in this application embodiment uses an aluminum transition piece 200 as an intermediate layer to connect the aluminum connector 100 and the copper connector 300. The aluminum transition piece 200 is connected to the copper connector 300 through a first mating part and a second mating part, providing additional mechanical connection force, enhancing connection reliability, reducing dependence on welding quality, lowering welding difficulty, and achieving a stable connection between the aluminum transition piece 200 and the copper connector 300, thus ensuring the stability of the contact assembly.

[0078] The aluminum connector 100 serves as the connection interface for the contact assembly and also constitutes the connection interface for the relay contact. It can be directly welded to the aluminum busbar 80, reducing the welding difficulty between the relay contact and the aluminum busbar 80 and enabling a reliable connection between the relay and the aluminum busbar 80.

[0079] Compared to traditional copper busbars and bolt connections, the contact assembly provided in this application not only helps improve the reliability of the connection between the relay contacts and the aluminum busbar 80, but also reduces the overall manufacturing cost.

[0080] Combination Figure 2 As shown, in some embodiments, the first mating part includes a first connecting post 210 disposed at the second end of the aluminum transition member 200; the second mating part includes a first connecting groove 321 opened at the first end of the copper connector 300, and the first connecting post 210 is disposed in the first connecting groove 321.

[0081] By providing a first connecting post 210 at the second end of the aluminum transition piece 200, a protruding structure can be provided, making it easier for the aluminum transition piece 200 to mechanically engage with the copper connector 300. Correspondingly, by opening a first connecting groove 321 at the first end of the copper connector 300, it can cooperate with the first connecting post 210 to form a stable mechanical connection.

[0082] This groove-column mating method not only provides preliminary mechanical fixation before welding to reduce possible displacement and misalignment during welding, but also provides additional mechanical connection strength, reduces stress concentration during welding, and lowers the risk of welding defects.

[0083] It should be noted that the side wall of the first connecting post 210 can be welded to the inner side wall of the first connecting groove 321 to improve the connection stability between the aluminum transition piece 200 and the copper connector 300.

[0084] The end face of the first connecting post 210 facing the first connecting groove 321 can be welded to the inner bottom wall of the first connecting groove 321 to further improve the connection stability between the aluminum transition piece 200 and the copper connector 300.

[0085] Specifically, through the design of the first connecting post 210 and the first connecting groove 321, the connection between the aluminum transition piece 200 and the copper connector 300 not only relies on welding but also provides additional stability through mechanical mating. This design effectively reduces welding difficulty and defect risk while improving the reliability and durability of the connection, thereby enhancing the stability of the contact assembly.

[0086] The aluminum connector 100 serves as the connection interface for the contact assembly and can be directly welded to the aluminum busbar 80, which reduces the difficulty of connecting the relay and the aluminum busbar 80 and ensures a stable connection between the relay and the aluminum busbar 80.

[0087] In some embodiments, the outer peripheral surface of the first connecting post 210 is provided with an external thread, and the inner wall of the first connecting groove 321 is provided with an internal thread. The first connecting post 210 and the first connecting groove 321 are connected by a threaded engagement.

[0088] By setting the first connecting post 210 and the first connecting groove 321 to be connected by a threaded engagement, the connection between the aluminum transition piece 200 and the copper connector 300 not only relies on welding, but also provides additional mechanical strength through the thread.

[0089] This threaded fit provides a stronger mechanical locking capability, thereby increasing the reliability and durability of the contact assembly, especially in the dynamic environment of electric vehicles, preventing the connection between the relay and the aluminum busbar 80 from loosening during use due to vibration or thermal expansion.

[0090] Furthermore, the threaded connection between the aluminum transition piece 200 and the copper connector 300 allows for adjustments during manufacturing and maintenance to ensure optimal connection.

[0091] Combination Figure 3 and Figure 4As shown, in some embodiments, a second connecting groove 211 is provided at one end of the first connecting post 210 facing the first connecting groove 321; a second connecting post 3211 is provided in the first connecting groove 321.

[0092] Understandably, based on the first connecting post 210 and the first connecting groove 321, the second connecting post 3211 and the second connecting groove 211 form an additional mating structure, which can make the connection between the aluminum transition piece 200 and the copper connector 300 more stable.

[0093] Specifically, a double-groove-post mating structure is formed by introducing a second connecting groove 211 and a second connecting post 3211 between the first connecting post 210 and the first connecting groove 321. This design not only increases the strength of the mechanical connection but also provides higher resistance to vibration and thermal expansion.

[0094] In addition, the mechanical connection between the aluminum transition piece 200 and the copper connector 300 is relatively stable, which helps to further reduce the dependence on welding quality, reduce welding difficulty, and help to achieve a reliable connection between the aluminum busbar 80 and the relay.

[0095] In some embodiments, the inner wall of the second connecting groove 211 is provided with an internal thread, and the outer circumferential surface of the second connecting post 3211 is provided with an external thread. The second connecting post 3211 and the second connecting groove 211 are connected by a threaded engagement.

[0096] By configuring the second connecting post 3211 and the second connecting groove 211 to be connected by a threaded fit, the connection between the aluminum transition piece 200 and the copper connector 300 not only relies on welding, but also provides additional mechanical strength through the thread.

[0097] This threaded fit provides stronger mechanical locking capability, further enhancing the reliability and durability of the contact assembly to prevent contact assembly failure and to prevent loosening between the relay and the aluminum busbar 80 during use due to vibration or thermal expansion.

[0098] Furthermore, the threaded connection between the aluminum transition piece 200 and the copper connector 300 allows for adjustments during manufacturing and maintenance to ensure optimal connection.

[0099] In some embodiments, the first connecting post 210 and the second connecting post 3211 are coaxially arranged.

[0100] Understandably, when the first connecting post 210 and the first connecting groove 321, as well as the second connecting post 3211 and the second connecting groove 211 are all connected by threaded engagement, the first connecting post 210 and the second connecting post 3211 need to be coaxial in order to ensure that the two sets of mating parts engage simultaneously during the assembly rotation process.

[0101] The coaxial arrangement simplifies the assembly process, making it easier to keep the aluminum transition piece 200 and the copper connector 300 aligned during assembly, reducing stress concentration and potential mechanical failures caused by asymmetrical forces or eccentric loads.

[0102] Combination Figure 3 and Figure 4 As shown, in some embodiments, the aluminum transition member 200 includes a first connecting cap 220, the first end of the first connecting cap 220 being connected to the aluminum connector 100, and a first mating portion being disposed at the second end of the first connecting cap 220.

[0103] By introducing a first connecting cap 220 into the aluminum transition piece 200, a dedicated connection structure is provided to connect with the aluminum connector 100 to form a robust connection path within the contact assembly.

[0104] For example, the first connecting cap 220 and the aluminum connector 100 can be connected by welding or riveting, as long as a stable electrical connection effect can be provided. This application embodiment does not impose any restrictions on this.

[0105] In some embodiments, the aluminum connector 100 is welded to the aluminum busbar 80. The aluminum connector 100 is also connected to the aluminum transition piece 200, so that the aluminum connector 100 and the aluminum transition piece 200 can provide a reliable electrical connection between the aluminum busbar 80 and the copper connector 300.

[0106] In some embodiments, the cross-sectional area of ​​the first connecting cap 220 is smaller than the cross-sectional area of ​​the aluminum connector 100 in the direction from the first end to the second end of the aluminum transition member 200.

[0107] This configuration allows the aluminum connector 100 to provide sufficient welding area when welded to the aluminum busbar 80, thereby increasing the weld strength. Thus, the first connector cap 220 not only provides a stable electrical connection platform but also effectively distributes and manages stress through its structure, improving the durability and reliability of the connection.

[0108] This application embodiment does not impose any restrictions on the shape of the first connecting cap 220. The connection between the first connecting cap 220 and the first mating part can be provided with rounded corners or chamfered transition treatment to avoid generating large stress during subsequent welding or use.

[0109] Combination Figure 3 and Figure 4 As shown, in some embodiments, a retaining ring 322 is provided at the first end of the copper connector 300; a first groove 221 is provided at the second end of the first connecting cap 220; when the first connecting post 210 is disposed in the first connecting groove 321, the first end of the copper connector 300 abuts against the second end of the first connecting cap 220, and the retaining ring 322 is embedded in the first groove 221.

[0110] Understandably, when the aluminum transition piece 200 and the copper connector 300 are connected, in addition to the mating connection between the first connecting post 210 and the first connecting groove 321, the side wall of the first connecting post 210 can be welded to the inner side wall of the first connecting groove 321, and the end face of the first connecting post 210 facing the first connecting groove 321 can be welded to the bottom surface of the first connecting groove 321.

[0111] By combining mechanical connection and welding, the connection stability between the aluminum transition piece 200 and the copper connector 300 can be improved, thereby improving the stability of the contact assembly and, in turn, the connection stability between the relay contact and the aluminum busbar 80.

[0112] For example, the first connecting post 210 and the first connecting groove 321 can be welded together by brazing or diffusion welding, and this application embodiment does not limit this.

[0113] It should be noted that brazing is a solid-state joining method that uses a metal with a lower melting point than the base metal (copper and aluminum) as a filler metal. During the heating process, the filler metal melts while the base metal does not melt. The liquid filler metal wets the base metal and fills the joint gap, and then diffuses with the base metal, thereby firmly connecting the aluminum transition piece 200 and the copper connector 300 together.

[0114] When brazing is used, the material will undergo thermal expansion and contraction. The inner diameter of the first connecting groove 321 can be set to be larger than the diameter of the first connecting post 210 to provide a buffer space, allowing the material to move naturally during the brazing process, so that the solder can be evenly distributed and the reliability and strength of the weld can be improved.

[0115] Diffusion welding is a solid-state welding method that places closely contacting workpieces in a vacuum or protective gas atmosphere and maintains them at a certain temperature and pressure for a period of time, allowing atoms at the contact interface to diffuse into each other and achieve a reliable connection.

[0116] Among them, the side wall of the first connecting post 210, the inner side wall of the first connecting groove 321, the end face of the first connecting post 210 facing the first connecting groove 321, and the bottom surface of the first connecting groove 321 can be smooth planes.

[0117] The aforementioned surface to be welded can also be provided with raised structures to increase the welding area.

[0118] For example, the raised structure can be in the form of bumps or corrugations, as long as it can increase the contact area of ​​the surface to be welded. This application does not limit this.

[0119] By providing a retaining ring 322 on the copper connector 300, a physical barrier can be provided to limit the diffusion range of welding materials during the welding process and prevent excessive flow of the molten pool during welding.

[0120] By providing a first groove 221 in the first connecting cap 220, a space is provided to accommodate the retaining ring 322. When the first connecting post 210 is disposed in the first connecting groove 321, it cooperates with the retaining ring 322 to restrict the flow of welding material during the welding process.

[0121] The height of the retaining ring 322 is not higher than the depth of the first groove 221, and the retaining ring 322 can be fully embedded in the groove, reducing assembly difficulties caused by size mismatch.

[0122] For example, the retaining ring 322 can be integrally formed with the copper connector 300. The retaining ring 322 can be formed by grinding or milling processes, and this application embodiment does not impose any limitation on this.

[0123] Combination Figure 3 As shown, in some embodiments, the aluminum transition member 200 is provided with a through hole 201, the first end of the through hole 201 is connected to the first end of the aluminum transition member 200, and the second end of the through hole 201 is connected to the second end of the aluminum transition member 200.

[0124] Understandably, the through hole 201 extends axially through the entire aluminum transition piece 200.

[0125] The second end of the through hole 201 is connected to the second connecting groove 211, and the inner diameter of the through hole 201 is smaller than the inner diameter of the second connecting groove 211.

[0126] By providing through holes 201 on the aluminum transition piece 200, the through holes 201 are allowed to form a continuous channel throughout the aluminum transition piece 200, which enhances the exhaust and heat dissipation functions.

[0127] Specifically, during the welding process, the through hole 201 can provide an exhaust path, allowing gas to be smoothly discharged during the welding process, preventing welding defects such as porosity and slag inclusion caused by gas retention, thereby improving the welding quality.

[0128] Combination Figure 4As shown, in some embodiments, the copper connector 300 includes a second connector cap 320 and a third connector post 310 connected to each other; the second connector cap 320 has a first connector groove 321, the opening of the first connector groove 321 is located on the end face of the second connector cap 320 away from the third connector post 310; the third connector post 310 is used to connect with the relay ceramic 90.

[0129] The retaining ring 322 is disposed on the second connecting cap 320. During specific installation, the end of the second connecting cap 320 facing away from the third connecting post 310 abuts against the first connecting cap 220, so that the retaining ring 322 is embedded in the first groove 221.

[0130] The first connecting groove 321 is formed on the second connecting cap 320 and extends into the interior of part of the third connecting post 310, thus providing a connecting interface that ensures a tight fit with the first mating part on the aluminum transition piece 200. This design helps to achieve accurate positioning and fixation during assembly.

[0131] When the copper connector 300 is connected to the relay ceramic 90, the third connecting post 310 can be inserted into the relay ceramic 90 and extend into the relay ceramic 90 to connect with other contacts of the relay, thereby achieving the purpose of relay conduction.

[0132] When the copper connector 300 is connected to the relay ceramic 90, the second connector 320 can abut against the surface of the relay ceramic 90, and the second connector 320 can be welded to the surface of the relay ceramic 90.

[0133] Combination Figure 4 and Figure 5 As shown, in some embodiments, the second connecting cap 320 is provided with a welding portion 330 facing the third connecting post 310, and the welding portion 330 is used for welding with the relay ceramic 90.

[0134] The welding section 330 provides a specially designed area for welding to the relay ceramic 90. This design ensures maximum material contact area during the welding process, thereby improving weld strength and connection stability.

[0135] In some embodiments, the welding portion 330 is provided with a second groove 331.

[0136] By providing a second groove 331 on the welding part 330, a buffer space can be provided, so that the thermal expansion and contraction of the material during the welding process can be buffered in this area to disperse the welding stress, prevent stress concentration from causing structural damage to the welding part 330 and the relay ceramic 90, and improve the welding quality and connection reliability.

[0137] For example, for ease of processing and welding, the aluminum connector 100, aluminum transition piece 200, and copper connector 300 in the contact assembly can all be rotary parts.

[0138] Of course, the components in the contact assembly can also be of other shapes, as long as they can achieve an effective electrical connection between the relay and the aluminum busbar 80. This application embodiment does not impose any restrictions on this.

[0139] A second aspect of this application provides a relay contact, including the contact assembly provided in any of the above embodiments.

[0140] The contact components have been described in detail in the above embodiments and will not be repeated here.

[0141] Combination Figure 5 As shown, this application provides a relay in three aspects, including a relay ceramic 90 and a relay contact provided in any of the above embodiments; the relay contact includes a contact assembly, which is connected to the relay ceramic 90.

[0142] The relay contacts and contact assemblies have been described in detail in the above embodiments and will not be repeated here.

[0143] The contact assembly includes a copper connector 300, which, as part of the contact assembly, provides excellent conductivity, ensuring efficient transmission of electrical signals. Copper's high conductivity and good mechanical properties make it an ideal material for electrical connections.

[0144] By using copper as the connector material, the design ensures low-loss current transmission, improving the efficiency and reliability of the electrical system. The mechanical strength of copper also enhances the durability of the connection.

[0145] Understandably, when the copper connector 300 is connected to the relay ceramic 90, the third connecting post 310 can be inserted into the relay ceramic 90 to extend into the interior of the relay ceramic 90 and connect with other contacts of the relay, thereby achieving the purpose of relay conduction.

[0146] When the copper connector 300 is connected to the relay ceramic 90, the second connector 320 can abut against the surface of the relay ceramic 90 to form a stable contact interface, and the second connector 320 can also be welded to the surface of the relay ceramic 90.

[0147] It should be noted that ceramic metallization can be used to weld the ceramic and the copper connector 300 in the contact assembly together.

[0148] Ceramic metallization can be achieved using various methods, including the molybdenum-manganese method, gold plating, copper plating, tin plating, and nickel plating. Among these, the molybdenum-manganese method is a commonly used approach. It involves coating the ceramic surface with a molybdenum-manganese slurry and sintering it at high temperatures to form a metallized thin film on the ceramic surface.

[0149] This application provides a vehicle in four aspects, including the relays provided in any of the above embodiments.

[0150] The relay has been described in detail in the above embodiments and will not be repeated here.

[0151] In summary, the contact assembly provided in this application adopts a modular connection structure and provides multiple mechanical locking and electrical connection mechanisms to ensure the stability of the contact assembly.

[0152] The aluminum connector serves as the connection interface for the contact assembly and also constitutes the connection interface for the relay contact. It can be directly welded to the aluminum busbar, reducing the welding difficulty between the relay contact and the aluminum busbar and achieving a reliable connection between the relay and the aluminum busbar.

[0153] Finally, it should be noted that those skilled in the art, upon considering the specification and practicing the application disclosed herein, will readily conceive of other embodiments of the present application. The embodiments of this application are intended to cover any variations, uses, or adaptations of the embodiments of this application that follow the general principles of the embodiments of this application and include common knowledge or customary technical means in the art not disclosed in the embodiments of this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the embodiments of this application are indicated by the following claims.

[0154] It should be understood that the embodiments of this application are not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments of this application is limited only by the appended claims.

Claims

1. A contact assembly, characterized in that, Includes aluminum connectors (100), aluminum transition pieces (200), and copper connectors (300); The aluminum connector (100) is used to connect to the aluminum busbar (80); The first end of the aluminum transition piece (200) is connected to the aluminum connector (100), and the second end of the aluminum transition piece (200) is provided with a first mating part; The first end of the copper connector (300) is provided with a second mating part, the first mating part and the second mating part are mated and connected, and the second end of the copper connector (300) is used to connect with the relay ceramic (90).

2. The contact assembly according to claim 1, characterized in that, The first mating part includes a first connecting post (210); The second mating part is provided with a first connecting groove (321), and the first connecting post (210) is disposed in the first connecting groove (321).

3. The contact assembly according to claim 2, characterized in that, The outer circumferential surface of the first connecting post (210) is provided with an external thread, and the inner wall of the first connecting groove (321) is provided with an internal thread. The first connecting post (210) and the first connecting groove (321) are connected by a threaded engagement.

4. The contact assembly according to claim 2 or 3, characterized in that, The first connecting post (210) has a second connecting groove (211) at one end facing the first connecting groove (321); A second connecting post (3211) is provided in the first connecting groove (321), and the second connecting post (3211) is provided in the second connecting groove (211).

5. The contact assembly according to claim 4, characterized in that, The inner wall of the second connecting groove (211) is provided with an internal thread, and the outer circumferential surface of the second connecting post (3211) is provided with an external thread. The second connecting post (3211) and the second connecting groove (211) are connected by a threaded engagement.

6. The contact assembly according to claim 5, characterized in that, The first connecting post (210) and the second connecting post (3211) are coaxially arranged.

7. The contact assembly according to claim 2, characterized in that, The aluminum transition member (200) includes a first connecting cap (220), the first end of which is connected to the aluminum connector (100), and the first mating part is disposed at the second end of the first connecting cap (220).

8. The contact assembly according to claim 7, characterized in that, A retaining ring (322) is provided at the first end of the copper connector (300); The second end of the first connecting cap (220) is provided with a first groove (221); When the first connecting post (210) is disposed in the first connecting groove (321), the first end of the copper connector (300) abuts against the second end of the first connecting cap (220), and the retaining ring (322) is embedded in the first groove (221).

9. The contact assembly according to claim 1, characterized in that, The aluminum transition piece (200) has a through hole (201) which extends through the aluminum transition piece (200) axially.

10. The contact assembly according to claim 4, characterized in that, The copper connector (300) includes a second connector cap (320) and a third connector post (310) that are connected to each other; The first connecting groove (321) is located on the second connecting cap (320), and the opening of the first connecting groove (321) is located on the end face of the second connecting cap (320) away from the third connecting post (310); The third connecting post (310) is used to connect to the relay ceramic (90).

11. The contact assembly according to claim 10, characterized in that, The second connecting cap (320) is provided with a welding part (330) facing the third connecting post (310), and the welding part (330) is used to weld to the relay ceramic (90).

12. The contact assembly according to claim 11, characterized in that, The welded part (330) is provided with a second groove (331).

13. A relay contact, characterized in that, Includes the contact assembly as described in any one of claims 1-12.

14. A relay, characterized in that, Includes relay ceramic (90) and relay contact as described in claim 13; The relay contact includes a contact assembly connected to the relay ceramic (90).

15. A car, characterized in that, Including the relay as described in claim 14.

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