Relay contact, relay, electric control assembly and electric equipment

Abstract

The utility model provides a relay contact, a relay, an electric control assembly and electric equipment, the relay contact comprises a contact body and a contact cap, the contact cap is used for connecting a busbar, the contact cap and the contact body are made of different materials, the contact body and the contact cap are in plugging cooperation through a concave-convex structure, and the contact cap and the contact body are made of different materials. The concave-convex structures are connected in a matched mode. The relay contact is good in connection stability and long in service life.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a relay contact, a relay, an electrical control component, and an electrical equipment. Background Technology

[0002] Relays and busbars are key components of electronic control systems. Relays can connect to busbars through their contacts. In related technologies, relay contacts are made of composite structures of different materials to achieve stability when the relay contacts and busbars are connected.

[0003] However, in related technologies, the connection strength between the composite structures of relay contacts is low, making them prone to loosening. This results in poor connection stability of the relay contacts, which in turn reduces their lifespan. Utility Model Content

[0004] This application provides a relay contact, a relay, an electrical control component, and an electrical device, which can ensure the connection stability of the relay contact and increase the contact life.

[0005] The first aspect of this application provides a relay contact for connecting a relay and a busbar, including a contact body and a contact cap, the contact cap being used to connect the busbar, the contact cap and the contact body being made of different materials, the contact body and the contact cap being engaged by a concave-convex structure, and the concave-convex structure being engaged and connected.

[0006] According to the relay contact of the first aspect of this application, the relay contact has a contact body and a contact cap. The contact body and the contact cap are engaged by a concave-convex structure. The engagement between the contact body and the contact cap increases the connection area, which strengthens the connection between the contact body and the contact cap, making it less prone to loosening. This ensures the connection stability of the relay contact, avoids increased resistance at the contact point between the contact body and the contact cap, and prevents the enhancement of the galvanic effect between copper and aluminum. This not only avoids safety hazards but also increases the lifespan of the relay contact.

[0007] In one possible implementation, the contact body includes a housing, the contact cap includes a cap body, one end of the housing has a connecting groove, and a portion of the cap body can be inserted into the connecting groove.

[0008] In one possible implementation, the cap body includes a first cap body for inserting into the connecting groove, wherein both the first cap body and the connecting groove are cylindrical structures.

[0009] In one possible implementation, the first cap body and the inner wall of the connecting groove are connected by welding, conductive adhesive bonding, or interference fit.

[0010] In one possible implementation, when the first cap body and the inner wall of the connecting groove are welded or bonded with conductive adhesive, there is a gap between the outer wall of the first cap body and the groove wall of the connecting groove, and the size of the gap is 0mm-0.1mm.

[0011] In one possible implementation, the contact cap further includes a second cap body connected to the first cap body, the second cap body having a radial dimension greater than that of the first cap body.

[0012] In one possible implementation, the contact body further includes an abutment portion surrounding the peripheral wall of the housing, wherein when the first cap is inserted into the connecting groove, the second cap abuts against the abutment portion.

[0013] In one possible implementation, an annular groove is provided at the end of the abutment portion away from the second cap body.

[0014] In one possible implementation, the annular groove is formed on the side of the abutment portion facing the first cap body.

[0015] In one possible implementation, the size difference between the inner and outer rings of the annular groove is 1 mm to 3 mm.

[0016] In one possible implementation, the contact cap further includes a third cap body connected to the end of the second cap body facing away from the first cap body, the radial dimension of the third cap body being larger than the radial dimension of the first cap body.

[0017] In one possible implementation, the second cap body and the third cap body are spaced apart, and a connecting body is provided between the second cap body and the third cap body, and the second cap body and the third cap body are connected by the connecting body.

[0018] In one possible implementation, the shape of the connector is rectangular or circular.

[0019] In one possible implementation, the interval between the third cap body and the second cap body is greater than or equal to 1 mm.

[0020] In one possible implementation, the cap body is provided with a through hole that penetrates the cap body, and when the cap body is inserted into the connecting groove, the through hole communicates with the connecting groove.

[0021] In one possible implementation, the material of the contact cap is the same as the material of the busbar.

[0022] In one possible implementation, the contact body is made of either copper or aluminum, and the contact cap is made of either copper or aluminum.

[0023] In one possible implementation, the contact cap further includes a connecting portion for connection to the busbar, the connecting portion being located at the end of the cap body away from the end that is inserted into the connecting slot.

[0024] In one possible implementation, the sidewall of the connecting part is formed by a curved surface; or, the sidewall of the connecting part is formed by multiple curved surfaces connected end to end in sequence; or, the sidewall of the connecting part is formed by multiple planes connected end to end in sequence; or, the sidewall of the connecting part is formed by a combination of curved surfaces and planes.

[0025] In one possible implementation, the sidewall of the connecting part is formed by a plurality of arc surfaces that bulge outward in a direction away from the central axis of the cap body; the plurality of arc surfaces are connected end to end around the central axis of the cap body.

[0026] In one possible implementation, the connecting part is a ring structure.

[0027] In one possible implementation, the inner ring size of the connecting portion is smaller than the size of the connecting groove, and the outer ring size of the connecting portion is larger than the size of the connecting groove.

[0028] In one possible implementation, the connecting part is arranged in a cross shape, and the outer wall of the connecting part is formed by connecting multiple planes end to end, with adjacent planes perpendicular to each other.

[0029] In one possible implementation, the contact cap further includes a positioning element for engaging and positioning with a positioning mating element of the busbar.

[0030] A second aspect of this application provides a relay, including a base and the relay contacts described above.

[0031] A third aspect of this application provides an electronic control component, including a bus and the aforementioned relay, wherein the relay is connected to the bus via relay contacts.

[0032] In one possible implementation, a portion of the contact cap is pluggable to the busbar, and the contact cap and the busbar are welded together at the pluggable position.

[0033] In one possible implementation, the busbar is provided with a connection hole for connecting to the contact cap.

[0034] In one possible implementation, the busbar is further provided with a positioning fitting for engaging and positioning with a positioning element on the contact cap.

[0035] In one possible implementation, the bus is made of either copper or aluminum.

[0036] A fourth aspect of this application provides an electrical appliance including the aforementioned electrical control components. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This paper shows a schematic diagram of the relay and bus connection structure provided in some embodiments of this application;

[0039] Figure 2 A cross-sectional view of a relay contact provided according to some embodiments of this application is shown;

[0040] Figure 3 A partial cross-sectional view is shown of a relay and bus connection structure provided in some embodiments of this application;

[0041] Figure 4 A first cross-sectional view is shown of the relay contacts and busbars provided in some embodiments of this application during welding;

[0042] Figure 5 A schematic diagram of a first structure of a contact cap provided according to some embodiments of this application is shown;

[0043] Figure 6 A schematic diagram of a first bus structure provided in some embodiments of this application is shown;

[0044] Figure 7 A schematic diagram of a second structure of the contact cap provided according to some embodiments of this application is shown;

[0045] Figure 8 A cross-sectional view of a bus provided according to some embodiments of this application is shown;

[0046] Figure 9 A schematic diagram of a third structure of the contact cap provided according to some embodiments of this application is shown;

[0047] Figure 10 A schematic diagram of a second bus structure provided in some embodiments of this application is shown;

[0048] Figure 11 A second cross-sectional view is shown when the relay contacts and busbars provided in some embodiments of this application are soldered;

[0049] Figure 12 A schematic diagram of a third bus structure provided according to some embodiments of this application is shown;

[0050] Figure 13 A schematic diagram of a fourth structure of the contact cap provided according to some embodiments of this application is shown;

[0051] Figure 14 A third cross-sectional view is shown when the relay contacts and busbars provided in some embodiments of this application are soldered.

[0052] Figure label:

[0053] 100. Relay contact; 10. Contact body; 11. Housing; 111. Connecting groove; 12. Abutting part; 121. Annular groove; 20. Contact cap; 21. First cap body; 211. Through hole; 22. Second cap body; 23. Third cap body; 24. Connecting body; 25. Connecting part; 26. Positioning element; 200. Base; 300. Connecting platform; 400. Support platform; 500. Busbar; 501. Connecting hole; 502. Positioning hole. Detailed Implementation

[0054] Traditional relay contacts are made of pure copper or copper alloy and are bolted to the busbar copper bus of the BDU (Battery Energy Distribution Unit), resulting in high overall cost. To reduce costs, some technologies have attempted to design the busbar to be made of aluminum. However, if the relay contacts are also made of aluminum, the high resistance of aluminum compared to copper cannot guarantee the low resistance requirement of the relay. If copper relay contacts are continued to be connected to aluminum busbars, the different coefficients of thermal expansion of copper and aluminum will cause the connection between the relay contacts and the busbar to loosen over time due to thermal expansion. This increases the resistance at the contact point, enhances the copper-aluminum galvanic effect, and poses a safety hazard.

[0055] To address the issue of loosening that can easily occur when copper and aluminum materials are joined, related technologies employ a two-part structure for the relay contact: one part is made of copper, and the other is made of aluminum, with the copper and aluminum parts welded together. When the busbar is made of aluminum, the aluminum part of the relay contact is connected to the busbar; when the busbar is made of copper, the copper part of the relay contact is connected to the busbar.

[0056] However, in related technologies, the welding area between the copper and aluminum structures of the relay contacts is small, the welding strength is not high, the bonding force between the copper and aluminum structures is weak, and they are prone to loosening, leading to poor contact and reduced conductivity.

[0057] Therefore, this application provides a relay contact, which is composed of two parts made of different materials. The contact area between the two parts of the relay contact is increased, which increases the welding strength of the two parts and makes the connection between the two parts strong and less prone to loosening.

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0059] Figure 1 A schematic diagram of a relay and bus connection structure provided in some embodiments of this application is shown.

[0060] See Figure 1 As shown, this application embodiment provides a relay and an electronic control component using the relay. The electronic control component may be, but is not limited to, a battery energy distribution unit. The electronic control component also includes a bus 500, and the relay can be electrically connected to the bus 500.

[0061] The relay includes a relay contact 100, a base 200, a connecting platform 300, and a drag platform 400. The base 200 serves as the main structure of the relay. The connecting platform 300 is connected to one end of the base 200, and the drag platform 400 is connected to the end of the connecting platform 300 facing away from the base 200. The relay contact 100 is connected to the base 200, and the relay contact can be connected to the busbar 500.

[0062] Figure 2 A cross-sectional view of a relay contact 100 provided according to some embodiments of this application is shown. Figure 3A partial cross-sectional view is shown of a relay and bus 500 connection structure provided according to some embodiments of this application.

[0063] See Figure 2 and Figure 3 As shown, this application also provides a relay contact 100 for a relay. In some embodiments, the relay contact 100 of this application includes a contact body 10 and a contact cap 20. The contact body 10 can be connected to a base 200. Specifically, the base 200 is provided with a mounting hole, and one end of the contact body 10 can be inserted into the mounting hole of the base 200 and fixed relative to the base 200.

[0064] The contact cap 20 is used to connect the busbar 500. When the contact body 10 is connected to the base 200, the busbar 500 is connected to the relay via the contact cap 20. The contact cap 20 and the contact body 10 are made of different materials. For example, the contact body 10 can be made of either copper or aluminum, and the contact cap 20 can be made of either copper or aluminum. It should be noted that the material of the contact cap 20 is the same as that of the busbar 500, which is made of either copper or aluminum. In the following explanation, we will use the example where both the contact cap 20 and the busbar 500 are made of aluminum and the contact body 10 is made of copper.

[0065] In this application, the contact body 10 and the contact cap 20 are connected by a concave-convex structure, and the concave-convex structures are connected to each other.

[0066] It is understood that the relay contact 100 of this application has a contact body 10 and a contact cap 20. The contact body 10 and the contact cap 20 are connected by a concave-convex structure. The connection area between the contact body 10 and the contact cap 20 is increased by the connection between the concave-convex structure, which can strengthen the connection strength between the contact body 10 and the contact cap 20, making it less likely for the contact body 10 and the contact cap 20 to loosen. This ensures the connection stability of the relay contact 100, avoids the increase of resistance at the contact position of the contact body 10 and the contact cap 20, and avoids the enhancement of the galvanic effect between copper and aluminum. This not only avoids safety hazards, but also increases the life of the relay contact 100.

[0067] Figure 4 A first cross-sectional view is shown of the relay contact 100 and bus 500 provided in some embodiments of this application when soldered.

[0068] In some embodiments, one of the contact body 10 and the contact cap 20 may be provided with a protruding structure, and the other with a recessed structure. The protruding structure can be inserted into the recessed structure to achieve the insertion and engagement of the contact body 10 and the contact cap 20. Figure 2As shown, the top end of the contact body 10 is provided with a groove structure, and the bottom end of the contact cap 20 is provided with a protrusion structure. The protrusion structure of the contact cap 20 can be inserted into the groove structure of the contact body 10.

[0069] For example Figure 4 As shown, the top of the contact body 10 can be provided with a protruding structure, and the contact cap 20 can be provided with a groove structure, and the top of the contact body 10 can be inserted into the contact cap 20.

[0070] Whether the contact body 10 is fitted with a protruding structure and inserted into the groove structure of the contact cap 20, or the contact cap 20 is fitted with a protruding structure and inserted into the groove structure of the contact body 10, there is no essential difference. The connection method is determined according to the actual application. In this embodiment, the example of the contact cap 20 being inserted into the contact body 10 is used for illustration.

[0071] See Figure 2 and Figure 3 As shown, in some embodiments, the contact body 10 includes a housing 11, and the contact cap 20 includes a cap body. One end of the housing 11 is provided with a connecting groove 111, and one end of the cap body can be inserted into the connecting groove 111, while the other end is used to connect to the busbar 500.

[0072] Specifically, in this embodiment, the cap body includes a first cap body 21, one end of which is used to insert into the connecting groove 111. It should be noted that the shape of the connecting groove 111 and the shape of the first cap body 21 are not limited; for example, the connecting groove 111 and the first cap body 21 can be cylindrical or square. To ensure a large contact area between the first cap body 21 and the connecting groove 111 after insertion, the shape of the first cap body 21 is consistent with the shape of the connecting groove 111. In this embodiment, both the first cap body 21 and the connecting groove 111 are cylindrical structures.

[0073] In some embodiments, the first cap 21 is inserted into the connecting groove 111, and the first cap 21 and the connecting groove 111 are coaxially arranged. The inner walls of the first cap 21 and the connecting groove 111 can be connected by welding, conductive adhesive bonding, or interference fit. By inserting the first cap 21 into the connecting groove 111, and connecting the mating end faces of the first cap 21 and the connecting groove 111 together in the above three ways, an electrical connection can be achieved between the inner walls of the first cap 21 and the connecting groove 111. The insertion fit increases the contact area between the first cap 21 and the connecting groove 111, and by electrically connecting the mating surfaces, the conductive area can be increased, thereby increasing conductivity.

[0074] When the first cap 21 and the inner wall of the connecting groove 111 are connected by welding, the welding method can be diffusion welding. When the first cap 21 and the inner wall of the connecting groove 111 are bonded by conductive adhesive, copper-based conductive adhesive or silver-based conductive adhesive can be used. Without considering deformation, the first cap 21 and the connecting groove 111 can also be interference-fitted, that is, the radial dimension of the first cap 21 is larger than the radial dimension of the connecting groove 111, and the interference fit fixes the first cap 21 within the connecting groove 111.

[0075] When the inner wall of the first cap 21 and the connecting groove 111 are bonded together by welding or conductive adhesive, there is a gap between the outer wall of the first cap 21 and the inner wall of the connecting groove 111. This gap should not be too large. In this embodiment, the gap between the outer wall of the first cap 21 and the inner wall of the connecting groove 111 is 0mm-0.1mm. This gap is within this range, which helps to avoid stress concentration problems caused by the different coefficients of thermal expansion between the first cap 21 and the shell 11.

[0076] For example, when the first cap 21 is inserted into the connecting groove 111 and the first cap 21 and the connecting groove 111 are coaxial, the gap between the outer wall of the first cap 21 and the inner wall of the connecting groove 111 can be 0.05mm.

[0077] See Figure 2 and Figure 3 As shown, in some embodiments, the contact cap 20 further includes a second cap body 22, which is connected to the end of the first cap body 21 away from the insertion slot 111. The radial dimension of the second cap body 22 is larger than the radial dimension of the first cap body 21. The second cap body 22 and the first cap body 21 can be separately configured or integrally formed. When the second cap body 22 and the first cap body 21 are separately configured, the second cap body 22 can be connected to the first cap body 21 by adhesive or welding.

[0078] It should be noted that the contact body 10 also includes an abutment portion 12, which is arranged around the peripheral wall of the housing 11. The abutment portion 12 is located at the opening of the connecting groove 111, and the abutment portion 12 and the contact body 10 are integrally formed. When the first cap 21 is inserted into the connecting groove 111, the end face of the second cap 22 facing the first cap 21 can abut against the abutment portion 12, and the two end faces of the second cap 22 and the abutment portion 12 that abut against each other can be welded by diffusion welding. By providing the second cap 22, which abuts against the abutment portion 12 and is welded to it, the stability of the connection between the first cap 21 and the housing 11 can be increased.

[0079] For example, after welding the two end faces of the second cap 22 and the abutment 12, a three-proof paint can be applied to the connection position of the second cap 22 and the abutment 12 to isolate air and prevent moisture and oxygen from entering the connection position of the second cap 22 and the abutment 12, as well as to prevent moisture and oxygen from entering the connection position of the first cap 21 and the housing 11, to prevent the formation of a galvanic cell structure between the first cap 21 and the contact body 10 due to the entry of water vapor, and to prevent the contact cap 20 from being corroded due to its low corrosion potential.

[0080] When the housing 11 is inserted into the base 200, the end face of the abutting part 12 facing away from the second cap 22 abuts against the outer wall of the base 200, and the end face of the abutting part 12 and the outer wall of the base 200 are connected by brazing with silver-copper brazing filler metal. This welding method can ensure the sealing of the welding position.

[0081] In this embodiment, an annular groove 121 is provided at the end of the abutment portion 12 away from the second cap 22 (the end where the abutment portion 12 and the base 200 abut). By providing an annular groove at the end face where the abutment portion 12 and the base 200 abut, the welding area between the abutment portion 12 and the base 200 can be reduced, thereby reducing the amount of brazing filler metal used and lowering costs.

[0082] In some embodiments, an annular groove 121 is formed on the side of the abutment portion 12 facing the first cap 21. In this way, when the abutment portion 12 and the base 200 are soldered together, the solder can be contained in the annular groove 121, preventing solder leakage and corrosion of the base 200 and the external structure of the abutment portion 12.

[0083] It should be noted that in this embodiment of the application, the size difference between the inner ring and the outer ring of the annular groove 121 of the abutment part 12 is set to 1.0mm-3.0mm. The annular structure within this range can ensure both welding reliability and strength, as well as the effect of preventing solder overflow.

[0084] See Figure 2 and Figure 3 As shown, in some embodiments, the contact cap 20 further includes a third cap body 23, which is connected to the end of the second cap body 22 facing away from the first cap body 21. The radial dimension of the third cap body 23 is greater than the radial dimension of the first cap body 21 and greater than the radial dimension of the second cap body 22.

[0085] This application sets the contact cap 20 as a multi-column structure composed of a first cap 21, a second cap 22 and a third cap 23. The relay is connected to the busbar 500 through the contact cap 20. When the relay and the busbar 500 are in use, the multiple caps together absorb the stress generated during use, so as to have a good anti-vibration effect.

[0086] In this embodiment, the second cap 22 and the third cap 23 are spaced apart. For example, a connecting body 24 is provided between the second cap 22 and the third cap 23, and the second cap 22 and the third cap 23 are connected by the connecting body 24. The outer walls of the second cap 22, the third cap 23, and the connecting body 24 form a buffer space. It should be noted that the shape of the connecting body 24 can be rectangular or circular, etc. This creates a buffer space between the second cap 22 and the third cap 23, which can buffer the diffusion welding between the first cap 21 and the shell 11 and avoid residual stress concentration after welding.

[0087] For example, in order to ensure the cushioning effect, the gap between the third cap 23 and the second cap 22 is greater than or equal to 1 mm.

[0088] See Figure 2 and Figure 3 As shown, in some embodiments, the contact cap 20 is provided with a through hole 211. The through hole 211 extends along the central axis of the first cap body 21 toward the third cap body 23 and passes through the entire contact cap 20. When the first cap body 21 is inserted into the connecting groove 111, the through hole 211 is connected to the connecting groove 111. When the first cap body 21 and the housing 11 are welded, it is beneficial for the gas generated during welding to be discharged from the through hole 211.

[0089] Figure 5 This diagram illustrates a first structural schematic of the contact cap 20 provided in some embodiments of this application. Figure 6 This diagram illustrates a first structural schematic of a bus 500 provided according to some embodiments of this application. Figure 7 This diagram illustrates a second structural schematic of the contact cap 20 provided in some embodiments of this application. Figure 8 A cross-sectional view of a bus 500 provided according to some embodiments of this application is shown. Figure 9 This diagram illustrates a third structural schematic of the contact cap 20 provided in some embodiments of this application. Figure 10 A second structural schematic diagram of the bus 500 provided according to some embodiments of this application is shown.

[0090] See Figures 5 to 10 As shown, in some embodiments, a connecting portion 25 is provided on the first cap 21, which is used to connect to the busbar 500. The connecting portion 25 is located at one end of the third cap 23 facing away from the connecting groove 111. The connecting portion 25 protrudes from the first cap 21, and the busbar 500 is provided with a connecting hole 501 for fitting with the connecting portion 25. The connecting portion 25 can be inserted into the connecting hole 501, and the outer wall of the connecting portion 25 can be welded to the inner wall of the connecting hole 501.

[0091] It should be noted that the shape and size of the connecting hole 501 are the same as those of the connecting part 25, so that the connecting part 25 can be inserted into and adapted to the connecting hole 501.

[0092] In some possible implementations, the side peripheral wall of the connecting portion 25 is formed by a curved surface; or, the side peripheral wall of the connecting portion 25 is formed by multiple curved surfaces connected end to end in sequence; or, the side peripheral wall of the connecting portion 25 is formed by multiple planes connected end to end in sequence; or, the side peripheral wall of the connecting portion 25 is formed by a combination of curved surfaces and planes.

[0093] Specifically, when the side peripheral wall of the connecting part 25 is formed by a curved surface, the connecting part 25 can be a cylindrical structure, in which case the side peripheral wall of the connecting part 25 is formed by an arc surface. When the connecting part 25 is cylindrical, it allows the connecting part 25 to be inserted into the connecting hole 501 at various angles around its axis, facilitating quick docking of the connecting part 25 with the connecting hole 501.

[0094] In some embodiments, when the sidewall of the connecting portion 25 is formed by multiple curved surfaces connected end to end in sequence, the sidewall of the connecting portion 25 can be formed by multiple arc surfaces, with the arc surfaces bulging outward in a direction away from the central axis of the first cap 21. The chord length and arc height of the arc surfaces are not limited. For example, the sidewall of the connecting portion 25 can be formed by four arc surfaces, which are connected end to end around the central axis of the first cap 21, thus making the shape of the connecting portion 25 resemble a flower petal. By setting the sidewall of the connecting portion 25 to be formed by multiple arc segments, the connection area between the connecting portion 25 and the busbar 500 can be increased, thereby increasing the welding area and improving the welding stability of the connecting portion 25 and the busbar 500.

[0095] In some embodiments, the connecting portion 25 can also be a ring structure, in which case the connecting hole 501 on the busbar 500 is also an annular hole, the inner ring of the annular hole is adapted to the inner ring of the connecting portion 25, and the outer ring of the annular hole is adapted to the outer ring of the connecting portion 25.

[0096] To ensure the welding strength of the connecting part 25 and the connecting hole 501, the distance between the bottom of the connecting hole 501 and the end face of the busbar 500 facing away from the connecting hole 501 is 0.5mm-2mm.

[0097] By setting the connecting part 25 as a ring structure, when the connecting part 25 and the connecting hole 501 are inserted, a welding position is formed between the inner ring of the connecting part 25 and the inner ring of the connecting hole 501, and another welding position is formed between the outer ring of the connecting part 25 and the outer ring of the connecting hole 501, so that there are two welding positions between the connecting part 25 and the connecting hole 501, increasing the bonding force between the connecting part 25 and the busbar 500, thereby increasing the torsional resistance between the relay contact 100 and the busbar 500.

[0098] In some embodiments, the connecting portion 25 can also be arranged in a "+" shape. In this case, the outer wall of the connecting portion 25 is formed by connecting multiple planes end to end, and adjacent planes are perpendicular to each other. By setting the side peripheral wall of the connecting portion 25 to be formed by connecting multiple planes, when the connecting portion 25 is inserted into the connecting hole 501, not only can the welding area between the connecting portion 25 and the connecting hole 501 be increased, making the welding between the connecting portion 25 and the connecting hole 501 more reliable, but the torsional resistance between the connecting portion 25 and the connecting hole 501 can also be increased.

[0099] Figure 11 A second cross-sectional view is shown when the relay contact 100 and bus 500 provided in some embodiments of this application are welded. Figure 12 This diagram illustrates a third structural schematic of the bus 500 provided according to some embodiments of this application. Figure 13 A schematic diagram of a fourth structure of the contact cap 20 provided according to some embodiments of this application is shown. Figure 14 A third cross-sectional view is shown of the relay contact 100 and bus 500 provided in some embodiments of this application when soldered.

[0100] See Figures 11 to 13 As shown, it should be noted that the dimension of the connecting part 25 in the radial direction of the first cap 21 is greater than the radial dimension of the connecting groove 111, or the dimension of the connecting part 25 in the radial direction of the first cap 21 is smaller than the radial dimension of the connecting groove 111, provided that there is sufficient welding area between the connecting part 25 and the busbar 500.

[0101] For example, when the connecting part 25 is an annular structure, the inner ring size of the connecting part 25 can be smaller than the size of the connecting groove 111, and the outer ring size of the connecting part 25 can be larger than the size of the connecting groove 111. In this way, in the direction of the central axis of the first cap 21, the connection position between the connecting part 25 and the busbar 500 can be kept as far away as possible from the welding position between the first cap 21 and the housing 11, avoiding secondary welding between the first cap 21 and the housing 11 when the connecting part 25 and the busbar 500 are welded.

[0102] Whether the dimension of the connecting part 25 along the radial direction of the first cap 21 is greater than the radial dimension of the connecting groove 111, or the dimension of the connecting part 25 along the radial direction of the first cap 21 is smaller than the radial dimension of the connecting groove 111, can be determined according to the different welding methods.

[0103] For example, see Figures 11 to 13 As shown, the connecting part 25 and the busbar 500 are welded together by through welding. At this time, the connecting part 25 is arranged in a ring shape, and the outer ring size and inner ring size of the connecting part 25 are both smaller than the radial size of the connecting groove 111.

[0104] For example, in Figure 14 In this process, the connecting part 25 and the busbar 500 are welded together by laser welding. At this time, the dimension of the connecting part 25 in the radial direction of the first cap 21 is larger than the dimension of the connecting groove 111.

[0105] See Figure 5 and Figure 6 As shown, in some embodiments, the contact cap 20 further includes a positioning member 26, and a positioning mating member is provided on the busbar 500 at a position corresponding to the positioning member 26. The positioning member 26 is used to engage and position with the positioning mating member of the busbar 500.

[0106] Specifically, the positioning element 26 is a protrusion on the third cap 23, and the positioning fitting element is a positioning hole 502 opened on the busbar 500. When the connecting part 25 is inserted into the connecting hole 501, the positioning element 26 can be inserted into the positioning hole 502.

[0107] It should be noted that the shape and size of the positioning element 26 are the same as those of the positioning hole 502. The positioning element 26 can be cylindrical, waist-shaped or square. There can be one or more positioning elements 26. When there are multiple positioning elements 26, the multiple positioning elements 26 are arranged at equal intervals around the central axis of the first cap body 21.

[0108] By setting the positioning element 26 and the positioning hole 502 together, not only can the contact be prevented from twisting relative to the busbar 500, but the insertion accuracy of the connecting part 25 and the connecting hole 501 can also be increased, avoiding poor welding caused by inaccurate positioning.

[0109] This application also provides an electrical device, including but not limited to electric vehicles, and the electrical device includes the aforementioned electronic control components.

[0110] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0111] In the description of this utility model, it should be understood that the terms "comprising" and "having" and any variations thereof used in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0112] Unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A relay contact for the connection of a relay and a busbar (500), characterized in that include: Contact body (10); as well as Contact cap (20) is used to connect the busbar (500). The contact cap (20) and the contact body (10) are made of different materials. The contact body (10) and the contact cap (20) are connected by a concave-convex structure.

2. The relay contact according to claim 1, characterized in that, The contact body (10) includes a housing (11), and the contact cap (20) includes a cap body. One end of the housing (11) is provided with a connecting groove (111), and part of the structure of the cap body can be inserted into the connecting groove (111).

3. The relay contact according to claim 2, characterized in that, The cap body includes a first cap body (21), which is used to be inserted into the connecting groove (111). Both the first cap body (21) and the connecting groove (111) are cylindrical structures.

4. The relay contact according to claim 3, characterized in that, The inner walls of the first cap (21) and the connecting groove (111) are connected by welding, conductive adhesive bonding or interference fit.

5. The relay contact according to claim 4, characterized in that, When the inner walls of the first cap body (21) and the connecting groove (111) are welded or bonded with conductive adhesive, there is a gap between the outer wall of the first cap body (21) and the groove wall of the connecting groove (111), and the size of the gap is 0mm-0.1mm.

6. The relay contact according to claim 3, characterized in that, The contact cap (20) further includes a second cap body (22), which is connected to the first cap body (21), and the radial dimension of the second cap body (22) is greater than the radial dimension of the first cap body (21).

7. The relay contact according to claim 6, characterized in that, The contact body (10) also includes an abutment portion (12), which is arranged around the peripheral wall of the housing (11). When the first cap (21) is inserted into the connecting groove (111), the second cap (22) abuts against the abutment portion (12).

8. The relay contact according to claim 7, characterized in that, An annular groove (121) is provided at the end of the abutting part (12) away from the second cap body (22).

9. The relay contact according to claim 8, characterized in that, The annular groove (121) is formed on the side of the abutment portion (12) facing the first cap body (21).

10. The relay contact according to claim 9, characterized in that, The size difference between the inner and outer rings of the annular groove (121) is 1mm-3mm.

11. The relay contact according to claim 6, characterized in that, The contact cap (20) also includes a third cap body (23), which is connected to the end of the second cap body (22) facing away from the first cap body (21). The radial dimension of the third cap body (23) is greater than the radial dimension of the first cap body (21).

12. The relay contact according to claim 11, characterized in that, The second cap body (22) and the third cap body (23) are spaced apart, and a connector (24) is provided between the second cap body (22) and the third cap body (23), and the second cap body (22) and the third cap body (23) are connected by the connector (24).

13. The relay contact according to claim 12, characterized in that, The shape of the connector (24) is rectangular or circular.

14. The relay contact according to claim 13, characterized in that, The interval between the third cap (23) and the second cap (22) is greater than or equal to 1 mm.

15. The relay contact according to any one of claims 2-14, characterized in that, The cap body is provided with a through hole (211), which penetrates the cap body. When the cap body is inserted into the connecting groove (111), the through hole (211) is connected to the connecting groove (111).

16. The relay contact according to any one of claims 1-14, characterized in that, The material of the contact cap (20) is the same as that of the busbar (500).

17. The relay contact according to any one of claims 1-14, characterized in that, The contact body (10) is made of either copper or aluminum, and the contact cap (20) is made of either copper or aluminum.

18. The relay contact according to any one of claims 2-14, characterized in that, The contact cap (20) also includes a connecting part (25) for connecting to the busbar (500), and the connecting part (25) is located at the end of the cap body away from the end that is inserted into the connecting groove (111).

19. The relay contact according to claim 18, characterized in that, The side wall of the connecting part (25) is formed by a curved surface; or, the side wall of the connecting part (25) is formed by multiple curved surfaces connected end to end in sequence; or, the side wall of the connecting part (25) is formed by multiple planes connected end to end in sequence; or, the side wall of the connecting part (25) is formed by a combination of curved surfaces and planes.

20. The relay contact according to claim 19, characterized in that, The side wall of the connecting part (25) is formed by multiple arc surfaces, which bulge outward in a direction away from the central axis of the cap body; the multiple arc surfaces are connected end to end around the central axis of the cap body.

21. The relay contact according to claim 18, characterized in that, The connecting part (25) is a circular ring structure.

22. The relay contact according to claim 21, characterized in that, The inner ring size of the connecting part (25) is smaller than the size of the connecting groove (111), and the outer ring size of the connecting part (25) is larger than the size of the connecting groove (111).

23. The relay contact according to claim 18, characterized in that, The connecting part (25) is arranged in a "+" shape, and the outer wall of the connecting part (25) is formed by connecting multiple planes end to end, with adjacent planes perpendicular to each other.

24. The relay contact according to any one of claims 1-14, characterized in that, The contact cap (20) also includes a positioning element (26), which is used to engage and position with the positioning mating element of the busbar (500).

25. A relay, characterized in that, It includes a substrate (200) and a relay contact (100) as described in any one of claims 1-24.

26. An electronic control component, characterized in that, It includes a bus (500) and a relay as claimed in claim 25, the relay being connected to the bus (500) via relay contacts.

27. The electronic control assembly according to claim 26, characterized in that, Part of the structure of the contact cap (20) can be plugged into the busbar (500), and the contact cap (20) and the busbar (500) are welded together at the plugging position.

28. The electronic control component according to claim 26, characterized in that, The busbar is provided with a connection hole for connecting to the contact cap.

29. The electronic control component according to claim 28, characterized in that, The busbar is also provided with a positioning fitting, which is used to engage and position with the positioning element on the contact cap.

30. The electronic control component according to claim 26, characterized in that, The busbar is made of either copper or aluminum.

31. An electrical appliance, characterized in that, Includes the electronic control components as described in any one of claims 26-30.

Images