Contact of a relay, relay and vehicle

Abstract

This application discloses a relay contact, a relay, and a vehicle, belonging to the field of relay technology. The relay contact includes: a first sub-contact, which is made of copper and has a first connecting portion; and a second sub-contact, which is made of aluminum and has a second connecting portion, and the second sub-contact is provided with a heat dissipation structure; the first connecting portion and the second connecting portion are welded together, and the welded area between the first connecting portion and the second connecting portion is a zigzag shape. According to the relay contact provided in the embodiments of this application, by connecting the first sub-contact made of copper and the second sub-contact made of aluminum through diffusion welding, and providing a heat dissipation structure on the second sub-contact, reliable connection between the second sub-contact and other electrical components or external electrical components can be achieved, the connection strength between the first sub-contact and the second sub-contact can be enhanced, and heat dissipation of the contact can be optimized.

Description

Technical Field

[0001] This application belongs to the field of relay technology, and particularly relates to a relay contact, a relay, and a vehicle. Background Technology

[0002] A busbar is a conductive device used in power systems to distribute electrical energy from one source to multiple loads or devices. In related technologies, the stationary contacts connecting relays to busbars are generally made of copper. Due to the material difference between copper stationary contacts and aluminum busbars, a reliable connection cannot be guaranteed. During long-term use, the connection between the two is prone to failure, leading to increased contact resistance and consequently a significant increase in contact temperature, causing safety hazards. Therefore, there is room for improvement. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the related art. To this end, this application proposes a relay contact, a relay, and a vehicle, which can realize a reliable connection between the relay contact and other electrical components or external electrical components.

[0004] In a first aspect, this application provides a relay contact, comprising:

[0005] The first contact is made of copper and has a first connecting part;

[0006] The second sub-contact is made of aluminum and has a second connecting part. The second sub-contact is provided with a heat dissipation structure.

[0007] The first connecting part is welded to the second connecting part, and the welding area between the first connecting part and the second connecting part is a polygonal shape.

[0008] According to the relay contact of this application, the first sub-contact of the copper component and the second sub-contact of the aluminum component are connected by diffusion welding, and the heat dissipation structure is provided on the second sub-contact. This can realize a reliable connection between the second sub-contact and other electrical components or external electrical components, enhance the connection strength between the first sub-contact and the second sub-contact, and optimize the heat dissipation of the contact.

[0009] According to one embodiment of this application, the second connecting portion includes a groove, the first connecting portion extends into the groove, and is connected to the second connecting portion by diffusion welding.

[0010] In the above description, the first connecting part and the second connecting part are connected by diffusion welding, which helps to improve the connection strength and stability between the first connecting part and the second connecting part.

[0011] According to one embodiment of this application, the second connecting portion includes a first groove and a second groove disposed at the bottom of the first groove, the first connecting portion includes a first boss and a second boss disposed at the top of the first boss, the second boss extends into the second groove and is welded together, and the first boss extends into the first groove and is welded together.

[0012] In the above description, by extending the first boss and the second boss into the first groove and the second groove respectively, and by connecting the corresponding boss and groove through diffusion welding, the connection strength and stability between the first connecting part and the second connecting part are improved.

[0013] According to one embodiment of this application, the first sub-contact includes a body and a first connecting portion, the cross-sectional area of ​​the first connecting portion is larger than the cross-sectional area of ​​the body, and the first connecting portion has a hollow groove surrounding the body at one end connected to the body.

[0014] In the above description, by setting the hollow groove, the connection strength and stability between the body and the ceramic part can be enhanced.

[0015] According to one embodiment of this application, the heat dissipation structure includes heat dissipation fins disposed on the second sub-contact.

[0016] In the above description, the air-cooled heat dissipation structure, with the heat dissipation fins provided on the second sub-contact, can increase the heat exchange area and improve the heat conduction efficiency.

[0017] According to one embodiment of this application, the heat dissipation fins are arranged at least on the back side of the second connection portion.

[0018] In the above description, the heat dissipation fins are arranged on the back of the second connection portion, which can reduce the space occupied in the electrical contact area.

[0019] According to one embodiment of this application, the heat dissipation structure includes: a liquid cooling channel for circulating liquid cooling medium, the liquid cooling channel being in contact with the surface of the second sub-contact opposite to the second connecting portion.

[0020] In the above description, the heat dissipation structure employing liquid cooling, with the recess provided on the second sub-contact and the liquid cooling channel installed in the recess, can improve heat dissipation efficiency.

[0021] According to one embodiment of this application, the relay contacts further include:

[0022] A heat sink is connected to the surface of the second sub-contact opposite to the second connecting part, and both the heat sink and the second sub-contact have recesses on their opposing surfaces. The recesses on the heat sink and the second sub-contact are joined to form the liquid cooling channel.

[0023] In the above description, the liquid-cooled heat dissipation structure has recesses on the heat sink and the second sub-contact, which interlock to form the liquid cooling channel, thereby improving heat dissipation efficiency.

[0024] According to one embodiment of this application, the area of ​​the second sub-contact away from the second connection portion is provided with a connection hole for connecting to other electrical components or external electrical components.

[0025] In the above description, by providing the connection hole on the second sub-contact, a reliable connection between the second sub-contact and other electrical components can be achieved, which helps to stabilize the current transmission and reduces the risk of poor contact or excessive contact resistance.

[0026] Secondly, this application provides a relay, including: a contact as described in any one of the above statements.

[0027] According to the relay of this application, the reliability of the relay can be improved by increasing the connection strength between the contacts of the relay and between the contacts and other electrical components or external electrical components.

[0028] Thirdly, this application provides a vehicle including: a relay as described above.

[0029] According to the vehicle of this application, the relay precisely controls the switching states of different circuits, enabling more refined electrical management, thereby improving the driving experience of the vehicle and optimizing the working efficiency of the electrical system.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is one of the structural schematic diagrams of the relay contacts provided in the embodiments of this application;

[0033] Figure 2 This is a second schematic diagram of the structure of the relay contacts provided in the embodiments of this application;

[0034] Figure 3 yes Figure 2 Sectional view at point AA;

[0035] Figure 4 This is one of the structural schematic diagrams of the second sub-contact of the relay contact provided in the embodiments of this application;

[0036] Figure 5 yes Figure 4 Sectional view at point BB;

[0037] Figure 6 This is the third schematic diagram of the structure of the relay contacts provided in the embodiments of this application;

[0038] Figure 7 This is the fourth schematic diagram of the structure of the relay contacts provided in the embodiments of this application;

[0039] Figure 8 yes Figure 7 Sectional view at CC;

[0040] Figure 9 This is a second schematic diagram of the structure of the second sub-contact of the relay provided in the embodiments of this application;

[0041] Figure 10 yes Figure 9 Sectional view at point DD;

[0042] Figure 11 This is a schematic diagram of the heat sink of the relay contacts provided in the embodiments of this application.

[0043] Figure label:

[0044] Relay contact 1;

[0045] First contact 10;

[0046] First connecting part 110, first boss 111, second boss 112;

[0047] Body 120, hollowed-out groove 130;

[0048] Second contact 20;

[0049] Second connecting part 210, first groove 211, second groove 212;

[0050] Heat dissipation structure 220, heat dissipation fins 221, liquid cooling channel 222, heat dissipation plate 223, recess 224;

[0051] Connection hole 230;

[0052] 30 ceramic parts. Detailed Implementation

[0053] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0054] This application aims to at least solve one of the technical problems existing in the related art. To this end, this application proposes a relay contact, a relay, and a vehicle, which can realize a reliable connection between the relay contact and other electrical components or external electrical components.

[0055] The following is for reference. Figures 1-11 The contact 1 of the relay according to an embodiment of this application is described.

[0056] like Figures 1-5 As shown, the relay contact 1 includes: a first sub-contact 10 and a second sub-contact 20. The first sub-contact 10 is made of copper and has a first connecting portion 110. The second sub-contact 20 is made of aluminum and has a second connecting portion 210. The second sub-contact 20 is provided with a heat dissipation structure 220. The first connecting portion 110 and the second connecting portion 210 are welded together, and the welding area between the first connecting portion 110 and the second connecting portion 210 is a zigzag shape.

[0057] Specifically, the first sub-contact 10 is made of copper and has a first connecting portion 110 for connecting with the second sub-contact 20. Copper is typically used in applications requiring high conductivity and can provide low resistance, thereby maintaining efficient current conduction. The second sub-contact 20 is made of aluminum and has a second connecting portion 210 for connecting with the first sub-contact 10. Aluminum is lightweight and cost-effective, which can reduce weight or cost. Combining the two can take advantage of their respective strengths and solve compatibility issues at the same time.

[0058] In addition, the relay generates heat during operation. The heat dissipation structure 220 helps to quickly dissipate the heat, reducing the risk of damage or poor contact caused by overheating of the contacts. Furthermore, aluminum has better heat dissipation performance than copper. The heat dissipation structure 220 on the second sub-contact 20 can improve heat dissipation efficiency.

[0059] For example, such as Figure 1 and Figure 6 As shown, the heat dissipation structure 220 can be an air-cooled structure or a liquid-cooled structure, etc.

[0060] The first connecting part 110 and the second connecting part 210 are welded together. Copper and aluminum have different coefficients of thermal expansion. The welded connection between the first connecting part 110 and the second connecting part 210 is prone to stress. Setting the welding area as a broken line can improve the welding strength and reduce the risk of weld failure due to factors such as thermal expansion or mechanical vibration. At the same time, it helps to disperse stress and reduce stress concentration, thereby reducing the risk of poor contact.

[0061] For example, the first connecting part 110 and the second connecting part 210 can be connected by diffusion welding. The first connecting part 110 and the second connecting part 210 permeate each other in the welding area. Diffusion welding is a solid-state welding technology that usually causes atomic diffusion at the material contact surface under high temperature and pressure to achieve connection. Diffusion welding can reduce welding difficulties caused by different melting points. At the same time, due to the characteristics of solid-state welding, it can reduce the heat-affected zone and reduce the softening or deformation of the material.

[0062] The zigzag-shaped welding area can promote atomic diffusion by increasing the contact area, thereby optimizing the effect of diffusion welding.

[0063] A busbar is a conductive device used in power systems to distribute electrical energy from one source to multiple loads or devices. In related technologies, the stationary contacts connecting relays to busbars are generally made of copper. Due to the material difference, a reliable connection cannot be guaranteed between copper and aluminum busbars. During long-term use, the connection between the two is prone to failure, leading to increased contact resistance and consequently a significant increase in contact temperature, causing safety hazards. There is room for improvement in this area.

[0064] This application uses a composite contact composed of a first sub-contact 10 made of copper and a second sub-contact 20 made of aluminum. The second sub-contact 20 is connected to the aluminum busbar, thereby achieving a reliable connection between the contact and the aluminum busbar.

[0065] Furthermore, the first sub-contact 10 and the second sub-contact 20 are connected by diffusion welding, which can enhance the connection strength between the first sub-contact 10 and the second sub-contact 20.

[0066] According to the relay contact 1 provided in the embodiments of this application, the first sub-contact 10 made of copper and the second sub-contact 20 made of aluminum are connected by diffusion welding, and a heat dissipation structure 220 is provided on the second sub-contact 20. This can realize a reliable connection between the second sub-contact 20 and other electrical components and external electrical components, and can also enhance the connection strength between the first sub-contact 10 and the second sub-contact 20, while optimizing the heat dissipation of the contacts.

[0067] In some embodiments, such as Figure 3 and Figure 5As shown, the second connecting part 210 includes a groove, the first connecting part 110 extends into the groove and is connected to the second connecting part 210 by diffusion welding.

[0068] Specifically, the second connecting part 210 includes a groove, which is mainly used to mate with the first connecting part 110 so that the first connecting part 110 and the second connecting part 210 are precisely aligned and remain stable. The first connecting part 110 extends into the groove and makes physical contact with the second connecting part 210, and is connected to the second connecting part 210 by diffusion welding, forming a welding area in the groove. The first connecting part 110 and the second connecting part 210 permeate each other in the welding area.

[0069] Diffusion welding is a solid-state welding technique that typically involves atomic diffusion at the material contact surface under high temperature and pressure to achieve a connection. Diffusion welding can reduce welding difficulties caused by differences in melting points. At the same time, due to the characteristics of solid-state welding, it can reduce the heat-affected zone and reduce the softening or deformation of materials.

[0070] Diffusion welding can also form a strong metal bond at the joint. Compared with traditional welding methods, diffusion welded joints usually have higher strength and stability, which can reduce cracking or deformation problems. At the same time, the zigzag weld area can promote atomic diffusion by increasing the contact area, thereby optimizing the effect of diffusion welding.

[0071] It is understandable that the first connecting part 110 and the second connecting part 210 are connected by diffusion welding, which helps to improve the connection strength and stability between the first connecting part 110 and the second connecting part 210.

[0072] In some embodiments, such as Figure 3 and Figure 5 As shown, the second connecting part 210 includes a first groove 211 and a second groove 212 disposed at the bottom of the first groove 211. The first connecting part 110 includes a first boss 111 and a second boss 112 disposed at the top of the first boss 111. The second boss 112 extends into the second groove 212 and is welded together. The first boss 111 extends into the first groove 211 and is welded together.

[0073] Specifically, such as Figure 5 As shown, the second connecting portion 210 includes a first groove 211 and a second groove 212, wherein the second groove 212 is disposed at the bottom of the first groove 211, and the projected area of ​​the second groove 212 along the height direction is smaller than the projected area of ​​the first groove 211 along the height direction. Figure 3As shown, the first connecting part 110 includes a first boss 111 and a second boss 112. The second boss 112 is disposed on the top of the first boss 111. The second boss 112 extends into the second groove 212 and is welded together. The first boss 111 extends into the first groove 211 and is welded together. Together, they form a continuous welding area in the first groove 211 and the second groove 212. The first connecting part 110 and the second connecting part 210 permeate each other in the welding area.

[0074] For example, the shape of the boss and the groove is not limited and may include waist-shaped, triangular or rectangular connection structures.

[0075] The first connecting part 110 and the second connecting part 210, through the cooperation of the first boss 111 and the first groove 211 and the cooperation of the second boss 112 and the second groove 212, help to accurately position the first connecting part 110 and the second connecting part 210, so that the components can be easily connected and errors can be reduced, while forming a double stable connection.

[0076] Diffusion welding can form a strong metal bond at the joint, and the cross-sectional shape of the welded area is a broken line, which can promote atomic diffusion, thereby optimizing the effect of diffusion welding.

[0077] It is understood that by extending the first boss 111 and the second boss 112 into the first groove 211 and the second groove 212 respectively, and connecting the corresponding bosses and grooves by diffusion welding, it helps to improve the connection strength and stability between the first connecting part 110 and the second connecting part 210.

[0078] In some embodiments, such as Figure 3 As shown, the first sub-contact 10 includes a body 120 and a first connecting part 110. The cross-sectional area of ​​the first connecting part 110 is larger than the cross-sectional area of ​​the body 120. The first connecting part 110 has a hollow groove 130 surrounding the body 120 at one end connected to the body 120.

[0079] The first sub-contact 10 includes a body 120 and a first connecting portion 110, wherein the first connecting portion 110 extends into the groove of the second connecting portion 210 and is welded to the second sub-contact 20. The body 120 is mounted to the ceramic component 30 by welding. The ceramic component 30 is an insulating component in the relay, mainly used to support and fix the relay contacts 1 and other electrical components, and to maintain proper electrical isolation between different contacts, reducing the risk of short circuits or electrical leakage.

[0080] The cross-sectional area of ​​the first connecting part 110 is larger than that of the body 120, which helps to increase the contact area between the first connecting part 110 and the second connecting part 210.

[0081] In addition, the end of the first connecting part 110 connected to the body 120 abuts against the ceramic part 30, and the first connecting part 110 is provided with a hollow groove 130 surrounding the body 120 at the end connected to the body 120. The connection area between the body 120 and the ceramic part 30 surrounds the body 120, and the hollow groove 130 is correspondingly provided with the connection area. The projection of the connection area along the height direction is located in the hollow groove 130.

[0082] In actual operation, the body 120 and the ceramic part 30 are connected by welding, and the contact area between the body 120 and the ceramic part 30 is large. The hollow groove 130 can be used to release the stress generated by welding and reduce the risk of the ceramic part 30 breaking due to stress during welding.

[0083] It is understandable that by setting the hollow groove 130, the connection strength and stability between the body 120 and the ceramic part 30 can be enhanced.

[0084] In some embodiments, such as Figure 1 and Figure 6 As shown, the second sub-contact 20 is provided with a heat dissipation structure 220, which can be at least one of the following structural forms:

[0085] Example 1: The heat dissipation structure 220 includes heat dissipation fins 221 disposed on the second sub-contact 20, and the heat dissipation fins 221 are arranged at least on the back side of the second connection portion 210.

[0086] like Figure 1 and Figure 5 As shown, the heat dissipation fins 221 are components located on the second sub-contact 20. They mainly improve heat dissipation efficiency by increasing the surface area. The heat dissipation fins 221 can provide a large surface area in a limited space, achieving efficient heat dissipation in a small space, saving space and improving heat dissipation efficiency.

[0087] In this embodiment, the heat dissipation fins 221 are typically made of metal or other materials with good thermal conductivity. For example, the heat dissipation fins 221 may be made of the same material as the second sub-contact 20, which is aluminum.

[0088] The heat sink 221 has active heat dissipation capability. The heat sink 221 is directly integrated into the second sub-contact 20. Heat can be conducted from the second sub-contact 20 through heat exchange between the heat sink 221 and the air. As the heat diffuses from the surface of the heat sink 221 to the surrounding air, the second sub-contact 20 can maintain a suitable operating temperature, reducing the risk of performance degradation or material aging caused by excessive temperature rise.

[0089] Furthermore, the shape of the heat dissipation fins 221 is not limited, and any structure with a large surface area is acceptable.

[0090] The heat dissipation fins 221 are arranged at least on the back side of the second connection portion 210. For example, the front side of the second connection portion 210 is the contact surface between the second sub-contact 20 and the first sub-contact 10. The heat dissipation fins 221 can be arranged on the non-contact surface between the second sub-contact 20 and the first sub-contact 10. For example, the non-contact surface between the second sub-contact 20 and the first sub-contact 10 includes the back side and the side side of the second connection portion 210.

[0091] Specifically, the available space on the back of the second connection portion 210 is greater than the available space on the side. The heat dissipation fins 221 are arranged on the back of the second connection portion 210, which can reduce the space occupied in the electrical contact area. In addition, the back of the second connection portion 210 is usually in an open area, and the heat dissipation fins 221 can make full use of natural convection or internal circulation airflow, thereby enhancing the heat dissipation effect.

[0092] It is understandable that by adopting an air-cooled heat dissipation structure 220 and setting heat dissipation fins 221 on the second sub-contact 20, the heat exchange area can be increased and the heat conduction efficiency can be improved.

[0093] Example 2: The heat dissipation structure 220 includes a liquid cooling channel 222 for the flow of liquid cooling medium, and the liquid cooling channel 222 is in contact with the surface of the second sub-contact 20 away from the second connecting portion 210.

[0094] like Figure 6 As shown, in this embodiment, the second sub-contact 20 has a recess 224 on the surface away from the second connecting portion 210, and the liquid cooling channel 222 is installed in the recess 224, that is, the liquid cooling channel 222 is in contact with the surface of the second sub-contact 20 away from the second connecting portion 210. The liquid cooling channel 222 is mainly used for circulating liquid cooling medium. The liquid cooling medium exchanges heat with the second sub-contact 20 through the liquid cooling channel 222. The liquid cooling medium absorbs heat and carries away heat, thereby reducing the temperature of the second sub-contact 20.

[0095] For example, the liquid cooling medium can be a liquid with good thermal conductivity, such as water, coolant, or a specific heat-conducting liquid. The liquid cooling medium flows in the liquid cooling channel 222 and absorbs heat from the surroundings to keep the temperature of the components in contact with the liquid cooling channel 222 within a reasonable range.

[0096] The liquid cooling channel 222 is typically made of metal or other materials with good thermal conductivity. For example, the liquid cooling channel 222 may be made of the same material as the second sub-contact 20, which is aluminum.

[0097] Furthermore, there are no restrictions on the arrangement and shape of the liquid cooling channels 222, as long as they are evenly distributed. For example, the shape of the liquid cooling channels 222 can be circular, trapezoidal, or rectangular, and the liquid cooling channels 222 can be arranged in a multi-ring or multi-layer structure.

[0098] Liquids generally have higher thermal conductivity than air. Compared with air-cooled heat dissipation fins 221, liquid cooling channels 222 have higher heat transfer efficiency. However, liquid cooling channels 222 are connected to pipes and other structures that transport liquid cooling media. Liquid cooling channels 222 are more complex to manufacture and install than heat dissipation fins 221. Different heat dissipation structures 220 can be selected according to actual conditions.

[0099] It is understandable that by using a liquid-cooled heat dissipation structure 220, setting a recess 224 on the second sub-contact 20, and installing the liquid-cooled channel 222 in the recess 224, heat dissipation efficiency can be improved.

[0100] In some embodiments, such as Figure 6 and Figure 11 As shown, when the heat dissipation structure 220 includes a liquid cooling channel 222, the relay contact 1 may also include a heat sink 223. The heat sink 223 is connected to the surface of the second sub-contact 20 away from the second connecting portion 210, and at least one of the surfaces of the heat sink 223 and the second sub-contact 20 facing each other is provided with a recess 224. The heat sink 223 and the second sub-contact 20 are mated to form a liquid cooling channel 222.

[0101] In this embodiment, the liquid cooling channel 222 is mainly used for circulating liquid cooling medium. The liquid cooling medium exchanges heat with the second sub-contact 20. The liquid cooling medium absorbs heat and carries away heat, thereby reducing the temperature of the second sub-contact 20.

[0102] For example, the liquid cooling medium can be a liquid with good thermal conductivity, such as water, coolant, or a specific heat-conducting liquid. The liquid cooling medium flows in the liquid cooling channel 222 and absorbs heat from the surroundings to keep the temperature of the components in contact with the liquid cooling channel 222 within a reasonable range.

[0103] The heat sink 223 is typically made of metal or other materials with good thermal conductivity. For example, the heat sink 223 may be made of the same material as the second sub-contact 20, which is aluminum.

[0104] The heat sink 223 is connected to the surface of the second sub-contact 20 that is away from the second connecting part 210, and the contact surface is kept sealed. The arrangement and shape of the liquid cooling channel 222 are not limited, as long as they are evenly distributed. For example, the shape of the liquid cooling channel 222 can be circular, trapezoidal or rectangular, etc., and the liquid cooling channel 222 can be arranged in a multi-ring structure.

[0105] Liquids generally have higher thermal conductivity than air. Compared with air-cooled heat dissipation fins 221, liquid cooling channels 222 have higher heat transfer efficiency. However, liquid cooling channels 222 are connected to pipes and other structures that transport liquid cooling media. Liquid cooling channels 222 are more complex to manufacture and install than heat dissipation fins 221. Different heat dissipation structures 220 can be selected according to actual conditions.

[0106] In this embodiment, the heat dissipation structure 220 can be at least one of the following structural forms:

[0107] Example 1: The heat sink 223 and the second sub-contact 20 are both provided with recesses 224 on their opposing surfaces. The recesses 224 on the heat sink 223 and the second sub-contact 20 are joined to form a liquid cooling channel 222.

[0108] like Figure 6 As shown, the arrangement and shape of the liquid cooling channel 222 are not limited, as long as they are evenly distributed. For example, the shape of the liquid cooling channel 222 can be circular, trapezoidal or rectangular, and the liquid cooling channel 222 can be arranged in a multi-ring or multi-layer structure.

[0109] It is understandable that by adopting a liquid-cooled heat dissipation structure 220, recesses 224 are respectively provided on the heat dissipation plate 223 and the second sub-contact 20. The recesses 224 are connected to form a liquid cooling channel 222, which can improve heat dissipation efficiency.

[0110] Example 2: The surface of the heat sink 223 facing the second sub-contact 20 is provided with a recess 224, and the recess 224 on the heat sink 223 and the second sub-contact 20 together form a liquid cooling channel 222.

[0111] like Figure 11 As shown, the arrangement and shape of the liquid cooling channel 222 are not limited, as long as they are evenly distributed. For example, the shape of the liquid cooling channel 222 can include a semi-circle, trapezoid, or rectangle, and the liquid cooling channel 222 can be arranged in a multi-ring structure.

[0112] Example 3: The second sub-contact 20 has a recess 224 on its surface facing the second sub-contact 20. The recess 224 on the second sub-contact 20 and the heat sink 223 together form a liquid cooling channel 222.

[0113] The arrangement and shape of the liquid cooling channel 222 are not limited, as long as they are evenly distributed. For example, the shape of the liquid cooling channel 222 can be semi-circular, trapezoidal or rectangular, and the liquid cooling channel 222 can be arranged in a multi-ring structure.

[0114] In some embodiments, such as Figure 1 and Figure 6 As shown, the area of ​​the second sub-contact 20 away from the second connecting portion 210 is provided with a connection hole 230 for connecting with other electrical components or external electrical components.

[0115] The second sub-contact 20 is one of the switching contacts in the relay, used to control the on / off state of the current. The second sub-contact 20 is electrically connected to other electrical components and external electrical components, and undertakes functions such as switching or control.

[0116] The second sub-contact 20 has a partitioning function, with different areas performing different functions. One end of the second sub-contact 20 serves as an electrical contact end and is provided with a second connecting part 210 for connecting with the first sub-contact 10. The area of ​​the second sub-contact 20 away from the second connecting part 210 is provided with a connecting hole 230 for connecting with other electrical components or external electrical components. For example, the second sub-contact 20 can be connected to an external busbar through the connecting hole 230, and the busbar is made of aluminum.

[0117] For example, the shape of the connecting hole 230 is not limited, and the connecting hole 230 can be a waist-shaped, triangular or rectangular connecting structure.

[0118] In addition, the area on the heat sink 223 corresponding to the connection hole 230 of the second sub-contact 20 is also provided with a connection hole 230, and the connection hole 230 on the heat sink 223 and the connection hole 230 on the second sub-contact 20 are matched in a direction perpendicular to the interface.

[0119] Understandably, by providing a connection hole 230 on the second sub-contact 20, a reliable connection between the second sub-contact 20 and other electrical components can be achieved, which helps to stabilize the current transmission and reduces the risk of poor contact or excessive contact resistance.

[0120] This application also provides a relay.

[0121] As shown in the figure, in some embodiments, the relay includes contacts.

[0122] A relay is a switching element widely used in electrical control systems. It is typically used to achieve remote control of circuits. Relays can control high-current circuits with low-current signals and have automation control capabilities.

[0123] The relay contact 1 is the core component of the relay, responsible for the conduction and disconnection of the circuit. By enhancing the thermal stability and overload resistance of the contact, the reliability of the relay can be improved. When the relay is working, the current passes through the contact, and the heat generated will cause the surface temperature of the contact to rise. The contact of this application can work stably in high temperature environment and has good heat dissipation performance.

[0124] Meanwhile, the relay contact 1 is provided with a connection structure for connecting with other electrical components and external electrical components. The reasonable layout of the connection structure can improve the connection strength, reduce safety hazards caused by poor electrical contact, and enhance the stability of the electrical system.

[0125] According to the embodiments of this application, the reliability of the relay can be improved by increasing the connection strength between the contacts 1 of the relay and between the contacts and other electrical components or external electrical components.

[0126] This application also provides a vehicle.

[0127] As shown in the figure, the vehicle includes a relay.

[0128] In some embodiments, the vehicle may be an electric vehicle, a hybrid vehicle, a conventional fuel vehicle, or other types of intelligent vehicles. Relays are typically used in vehicles to control the on / off state of current to ensure the stable operation of the electrical system. For example, relays in vehicles can be used to control the switching operations of electrical systems such as batteries, motors, lights, air conditioning, or window lifts.

[0129] The relay of this application can withstand long-term working loads, reducing the risk of failure caused by overuse or poor contact, and extending the service life of the relay and the entire vehicle electrical system.

[0130] According to the vehicle provided in the embodiments of this application, more detailed electrical management can be achieved by precisely controlling the switching states of different circuits through relays, thereby improving the driving experience of the vehicle and optimizing the working efficiency of the electrical system.

[0131] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0132] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0133] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0134] In the description of this application, "multiple" means two or more.

[0135] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0136] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0137] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0138] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A contact of a relay, characterized in that, include: The first contact is made of copper and has a first connecting part; The second sub-contact is made of aluminum and has a second connecting part. The second sub-contact is provided with a heat dissipation structure. The first connecting part is welded to the second connecting part, and the welding area between the first connecting part and the second connecting part is a polygonal shape.

2. The contact of the relay according to claim 1, characterized in that, The second connecting portion includes a groove, into which the first connecting portion extends and is connected to the second connecting portion by diffusion welding.

3. The contact of the relay according to claim 1, characterized in that, The second connecting portion includes a first groove and a second groove disposed at the bottom of the first groove. The first connecting portion includes a first boss and a second boss disposed at the top of the first boss. The second boss extends into the second groove and is welded together, and the first boss extends into the first groove and is welded together.

4. The contact of the relay according to claim 1, characterized in that, The first sub-contact includes a body and a first connecting part. The cross-sectional area of ​​the first connecting part is larger than the cross-sectional area of ​​the body. The first connecting part has a hollow groove surrounding the body at one end connected to the body.

5. The contact of the relay according to any one of claims 1-4, characterized in that, The heat dissipation structure includes heat dissipation fins disposed on the second sub-contact.

6. The contact of the relay according to claim 5, characterized in that, The heat dissipation fins are arranged at least on the back side of the second connection portion.

7. The contact of the relay according to any one of claims 1-4, characterized in that, The heat dissipation structure includes a liquid cooling channel for the flow of liquid cooling medium, wherein the liquid cooling channel is in contact with the surface of the second sub-contact opposite to the second connecting portion.

8. The contact of the relay according to claim 7, characterized in that, Also includes: A heat sink is connected to the surface of the second sub-contact opposite to the second connecting part, and both the heat sink and the second sub-contact have recesses on their opposing surfaces. The recesses on the heat sink and the second sub-contact are joined to form the liquid cooling channel.

9. The contact of the relay according to any one of claims 1-4, characterized in that, The area of ​​the second sub-contact away from the second connection portion is provided with a connection hole for connecting to other electrical components or external electrical components.

10. A relay, characterized in that, include: The contact as described in any one of claims 1-9.

11. A vehicle, characterized in that, include: The relay as described in claim 10.

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