Three-phase electric connection assembly, production method thereof, electric drive system and vehicle

Abstract

The invention relates to the technical field of vehicles, and provides a three-phase electric connection assembly, a production method thereof, an electric drive system and a vehicle. The three-phase electric connection assembly comprises a fixed seat and three conductive parts, the fixed part of each conductive part is arranged on the fixed seat in a penetrating manner, so that the connection parts at the two ends of the fixed part are respectively exposed out of the two opposite sides of the fixed seat, and the three-phase electric connection assembly can be respectively connected with the structures located at the two sides of the fixed seat and convey three-phase alternating current. Meanwhile, all the fixing parts are arranged close to each other in a triangular distribution mode, the structure compactness is high, and therefore under the condition that the safety distance between the adjacent conductive parts is guaranteed, the occupied space of the conductive parts is greatly reduced, the overall space utilization rate of the three-phase electric connection assembly is increased, and the cost is reduced. And the material cost of related parts is also reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to a three-phase electrical connection component, a production method thereof, an electric drive system and a vehicle. Background Art

[0002] In the electric drive system of new energy vehicles, a three-phase copper bar is an important electrical component, which plays a role in connecting circuits and transmitting three-phase alternating current. As a high-voltage current transmission channel, the three-phase copper bar is used to connect the three-phase windings of the stator of the motor to the external high-voltage line to ensure the efficient transmission of electrical energy between components such as the motor, controller and battery.

[0003] In the related art, to ensure sufficient safety distance between copper bars, the three-phase copper bars are usually arranged in a horizontal spaced manner. This arrangement occupies a large space and cannot meet the requirements of efficient integration. Summary of the Invention

[0004] In view of this, the present invention provides a three-phase electrical connection component, a production method thereof, an electric drive system and a vehicle to solve the problem that the existing three-phase copper bar occupies a large space.

[0005] To solve the above problems, the technical solution of the present invention is realized as follows:

[0006] A three-phase electrical connection component includes: a fixed seat; three conductive members, each of the conductive members having a fixing portion and connecting portions located at both ends of the fixing portion. Each of the fixing portions penetrates from one side of the fixed seat and exits from the opposite side, and the two connecting portions on each conductive member are respectively exposed on opposite sides of the fixed seat; wherein, along the direction perpendicular to the direction in which each fixing portion penetrates the fixed seat, the fixing portions approach each other and are arranged in a triangular distribution, and are all fixedly connected to the fixed seat; there is a safety distance between adjacent two fixing portions.

[0007] In some embodiments, the three-phase electrical connection component further includes: extension members, which are respectively connected to the connecting portions on the same side of the fixed seat among any two conductive members, and the two extension members extend in the direction of increasing the distance between them; wherein, a pre-positioning structure is provided between the extension member and the connecting portion.

[0008] In some embodiments, at least on the side of the fixed seat where each fixing portion exits, there are partition protrusions, and the partition protrusions at least separate the exiting portions of each fixing portion from each other.

[0009] In some embodiments, the fixing base includes: a base on which an annular groove is formed around each of the fixing portions; a cover body connected to the base, and at least a part of each of the fixing portions penetrates between the cover body and the base; wherein, a first mounting groove matching the number of the conductive members is formed through the base, and each of the conductive members passes out from the corresponding first mounting groove.

[0010] In some embodiments, an annular groove is formed around each of the fixing portions on the base; wherein, the three-phase electrical connection assembly further includes an annular magnet disposed in the annular groove and sleeved on each of the fixing portions.

[0011] In some embodiments, the three-phase electrical connection assembly further includes: a heat conducting block for performing heat exchange at least with the annular magnet; wherein, a second mounting groove is formed through the outer peripheral side wall of the base forming the annular groove, the heat conducting block is disposed in the second mounting groove, one side of the heat conducting block facing the inside of the annular groove abuts against the annular magnet, and the other side of the heat conducting block is used for abutting against a heat dissipation structure.

[0012] In some embodiments, a part of the outer peripheral side wall of the base forming the annular groove protrudes in the direction of expanding the annular groove to form a pouring space communicating with the annular groove, and the pouring space is used for injecting a sealing material into the annular groove; wherein, a notch through which the sealing material can flow is formed on the inner peripheral side wall of the base forming the annular groove.

[0013] In some embodiments, a boosting interface is provided on one of the connecting portions of at least one of the conductive members; wherein, a retaining wall is formed around the boosting interface on the cover body.

[0014] In some embodiments, the three-phase electrical connection assembly further includes: a wire harness assembly for at least transmitting electric energy; wherein, a wire harness mounting hole is further formed on the base, and the wire harness assembly passes through the wire harness mounting hole.

[0015] The embodiment of the present invention also provides a production method of a three-phase electrical connection component, including: manufacturing a cover body component, forming three conductive parts by stamping, making each of the conductive parts have a fixing part and connecting parts located at both ends of the fixing part, then distributing the fixing parts in a triangular manner, and then performing an injection molding process to form the cover body component; manufacturing a base, fixing the positions of the required prefabricated parts, then performing an injection molding process to form the base, and forming three through first installation grooves on the base, the number and distribution shape of each of the first installation grooves being matched with each of the fixing parts; sealing and assembling the components, respectively passing the fixing parts of each of the conductive parts through the corresponding first installation grooves, connecting the cover body component and the base, and then injecting glue for sealing between the cover body and the base; assembling the assembly, installing an extension part onto the corresponding connecting part after injection glue sealing and welding and fixing it, and then installing a sealing ring and an external wiring harness component to complete the overall production of the three-phase electrical connection component.

[0016] In some embodiments, the manufacturing of the base includes: forming a partition protrusion at a position adjacent to the first installation groove on the base.

[0017] In some embodiments, the manufacturing of the cover body component includes: splitting an extension part capable of being connected to the connecting part on two of the conductive parts; wherein, the production method further includes: after the sealing and assembly of the components are completed, connecting and fixing the split extension parts to the corresponding connecting parts, and making the two extension parts extend in the direction of increasing the distance between them respectively.

[0018] In some embodiments, the manufacturing of the base includes: forming an annular groove around the first installation groove on the base, and forming a second installation groove on the outer side wall of the outer ring of the base where the annular groove is formed; installing a heat conduction block in the second installation groove.

[0019] In some embodiments, the manufacturing of the base further includes: protruding a part of the outer side wall of the outer ring of the base where the annular groove is formed in the direction of expanding the annular groove to form a perfusion space communicating with the annular groove; forming a notch on the inner side wall of the inner ring of the base where the annular groove is formed for the sealing material to flow through.

[0020] In some embodiments, the manufacturing of the cover body component includes: setting a boost interface on one of the connecting parts of at least one of the conductive parts, and forming a retaining wall around the boost interface on the cover body.

[0021] The embodiment of the present invention also provides an electric drive system, including a drive motor, a power brick, and the above-mentioned three-phase electrical connection component; wherein, the two connecting parts of the same conductive part are respectively connected to the drive motor and the power brick.

[0022] An embodiment of the present invention further provides a vehicle, which includes a vehicle body and the above-mentioned electric drive system, and the electric drive system is installed on the vehicle body.

[0023] For the three-phase electrical connection component, its production method, electric drive system and vehicle provided by the embodiments of the present invention, the three-phase electrical connection component includes a fixed seat and three conductive members. By passing the fixing parts of each conductive member through the fixed seat, the connecting parts at both ends of the fixing parts are respectively exposed on the opposite sides of the fixed seat, so that the structures on both sides of the fixed seat can be respectively connected and three-phase alternating current can be transmitted. At the same time, the embodiments of the present invention also adopt the arrangement that the fixing parts are close to each other and distributed in a triangular shape, with a high degree of structural compactness. Thus, under the condition of ensuring a safe distance between adjacent conductive members, the occupied space of the conductive members is greatly reduced, the overall space utilization rate of the three-phase electrical connection component is improved, and the material cost of related components is also reduced. Description of the Drawings

[0024] Figure 1 is a three-dimensional schematic diagram of the three-phase electrical connection component provided by the embodiment of the present invention;

[0025] Figure 2 is an exploded schematic diagram of the three-phase electrical connection component provided by the embodiment of the present invention;

[0026] Figure 3 is a top view of the three conductive members provided by the embodiment of the present invention;

[0027] Figure 4 is an exploded schematic diagram of the conductive member and the extension member provided by the embodiment of the present invention;

[0028] Figure 5 is a three-dimensional schematic diagram of the base in the first direction provided by the embodiment of the present invention; Figure 6 is a three-dimensional schematic diagram of the base in the second direction provided by the embodiment of the present invention, where the first direction and the second direction are opposite;

[0029] Figure 7 is an exploded schematic diagram of the terminal fixing seat and a connection terminal provided by the embodiment of the present invention.

[0030] Description of the Reference Numerals:

[0031] 1. Three-phase power connection component; 11. Fixed seat; 111. Partition protrusion; 1111. Partition wall; 1112. Limit wall; 112. Base; 1121. Positioning pin; 1122. Clamping position; 1123. First installation groove; 1124. Annular groove; 11241. Limit protrusion; 11242. Second installation groove; 11243. Filling space; 11244. Notch; 1125. Sealing groove; 1126. Wiring harness installation hole; 113. Cover; 1131. Pin hole; 1132. Buckle; 1133. Retaining wall; 1134. Cable slot; 12. Conductive part; 121. Fixed part; 122. Connection part; 1221. Connection hole; 1222. Nut; 1223. First magnetic attraction structure; 1224. Boost interface; 13. Extension part; 131. Second magnetic attraction structure; 14. Annular magnet; 15. Heat conduction block; 151. Injection molding hole; 16. Sealing ring; 17. Wiring harness assembly; 171. Terminal fixed seat; 1711. Threading hole; 1712. Limit groove; 1713. Sealing lip; 172. Connection terminal; 173. Cable; 174. Wiring harness sheath; 175. Connector. Detailed implementation manners

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] In the various specific technical features described in the specific embodiments, they can be combined in any suitable manner without contradiction. For example, different embodiments and technical solutions can be formed by combining different specific technical features. To avoid unnecessary repetition, various possible combination methods of the specific technical features in the present invention will not be described separately.

[0034] In the following description, the terms "first / second / ..." involved are only used to distinguish different objects and do not indicate that there are the same or related relationships between the objects. It should be understood that the orientation descriptions "above", "below", "outside", and "inside" involved are all orientations in the normal use state, and the "left" and "right" directions represent the left and right directions shown in the specific corresponding schematic diagram, which can be the left and right directions in the normal use state or not.

[0035] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. "Plurality" means greater than or equal to two.

[0036] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides a three-phase electrical connection assembly 1, including a fixed seat 11 and three conductive members 12. Each conductive member 12 has a fixing portion 121 and connecting portions 122 located at both ends of the fixing portion 121. Each fixing portion 121 penetrates from one side of the fixed seat 11 and exits from the opposite side. The two connecting portions 122 on each conductive member 12 are respectively exposed on opposite sides of the fixed seat 11. Moreover, as Figure 3 shown, along the direction perpendicular to the direction in which each fixing portion 121 penetrates the fixed seat 11, the fixing portions 121 approach each other and are arranged in a triangular distribution, and are all fixedly connected to the fixed seat 11, with a safety distance between adjacent fixing portions 121.

[0037] Specifically, the three conductive members 12 are respectively used to connect the circuits of the U, V, and W phases in three-phase alternating current. The connecting portions 122 at both ends of each conductive member 12 can be respectively connected to a power source and a load, or respectively connected to different loads. For example, connection holes 1221 can be formed on the connecting portions 122, and nuts 1222 can be riveted or welded on the connection holes 1221, and then the connection between the connecting portions 122 and the power source or the load can be achieved through threaded fasteners such as bolts, thereby forming a circuit loop to provide three-phase alternating current for the load in the circuit. The conductive member 12 is made of a conductive material. For example, it can be made of metal plate materials such as copper and aluminum. When using the above metal plate materials, the conductive member 12 can be formed by sheet metal processes such as stamping and bending. It can be understood that the specific shape and size of the conductive member 12 can be adjusted according to actual needs, and the embodiment of the present invention does not make more limitations on the shape and size of the conductive member 12.

[0038] To ensure the reliable use of the conductive member 12, the fixing portion 121 of the conductive member 12 is passed through the fixing base 11 and fixedly connected to the fixing base 11, and then the fixing base 11 is fixedly connected to an external device, so as to realize the reliable fixing of the conductive member 12. For example, connection positions can be preset on the fixing base 11 for the fixing portion 121 of the conductive member 12 to pass through from these connection positions, or the fixing base 11 can also be set to be composed of multiple parts. During assembly, each part of the fixing base 11 jointly surrounds the fixing portion 121 and is spliced into a whole. Thereafter, the fixing portion 121 and the fixing base 11 can be finally fixed by means such as injection molding, welding or bolt connection.

[0039] It should be noted that when the fixing portion 121 passes through and is fixedly connected to the fixing base 11, a certain safety distance needs to be provided between adjacent fixing bases 11. For example, when the three-phase electrical connection assembly 1 is used for connecting three-phase alternating current with a rated voltage of 380V, the distance between each conductive member 12 should be not less than 20 millimeters to ensure the safety of the circuit and avoid interference between circuits of different phases. Due to the limitation of the above safety distance requirements, the occupied space required by the conductive member 12 is usually difficult to compress. In view of this, in the embodiments of the present invention, the fixing portions 121 are arranged in a triangular distribution.

[0040] Specifically, as Figure 3 shown, in the direction perpendicular to the direction in which the fixing portion 121 passes through the fixing base 11, the fixing portions 121 of the three conductive members 12 jointly form an approximately triangular shape, and the fixing portions 121 do not contact each other but are arranged at a certain distance. The specific size of the distance can be designed according to the standard of the safety distance. When designed in this way, while meeting the safety distance requirements, the occupied space of the conductive member 12 can be reduced. In particular, the occupied space of the conductive member 12 in the direction perpendicular to the direction of passing through the fixing base 11 can be significantly reduced. The conductive members 12 are arranged compactly and concentratedly, with high space utilization rate. Furthermore, the sizes of related components such as the fixing base 11 can be made smaller, reducing the weight, material cost, etc., and also making the overall structure of the three-phase electrical connection assembly 1 compact.

[0041] The three-phase electrical connection component 1 provided by the embodiments of the present invention includes a fixed seat 11 and three conductive members 12. The three conductive members 12 can be respectively connected to the circuits of the U, V, and W phases in three-phase alternating current. The connection portions 122 at both ends of each conductive member 12 are respectively exposed on opposite sides of the fixed seat 11, so that the structures on both sides of the fixed seat 11 can be respectively connected and three-phase alternating current can be transmitted. In the embodiments of the present invention, by arranging the fixing portions 121 close to each other in a direction perpendicular to the direction passing through the fixed seat 11 and distributing them in a triangular shape, it is possible to greatly reduce the occupied space of the conductive members 12 while ensuring a safe distance between adjacent conductive members 12, and also reduce the weight, material cost, etc. of related components such as the fixed seat 11. Furthermore, the overall space utilization rate and production cost of the three-phase electrical connection component 1 can be improved, better meeting the requirements of high-efficiency integration.

[0042] In some embodiments, as Figure 2 and Figure 4 shown, the three-phase electrical connection component 1 further includes an extension member 13. Specifically, among any two conductive members 12, extension members 13 are respectively connected to the connection portions 122 on the same side of the fixed seat 11, and the two extension members 13 extend in directions that increase the distance between them. Moreover, a pre-positioning structure is provided between the extension member 13 and the connection portion 122.

[0043] Specifically, on the basis of the triangular distribution of the fixing portions 121, in order to facilitate the assembly of each conductive member 12 and the fixed seat 11, and the position adaptation between the connection portion 122 and the external connection structure, extension members 13 can be respectively connected to the connection portions 122 on the same side of any two of the conductive members 12. The any two conductive members 12 can be the conductive members 12 connecting the U-phase and W-phase circuits, or the conductive members 12 connecting the U-phase and V-phase circuits, etc. It should be noted that the connection operation of the extension member 13 is carried out after the connection and fixation between the fixing portion 121 and the fixed seat 11, so as to avoid the extension member 13 from hindering the connection operation between the fixing portion 121 and the fixed seat 11.

[0044] Since the distance between the fixing portions 121 is set to be small to reduce the area occupied on the fixed seat 11, and in actual connection, it is necessary to appropriately increase the distance between the conductive members 12 to meet the requirements of connection to the power supply and load. Therefore, the two extension members 13 can be extended in directions that increase the distance between them, so as to extend and adjust the connection position to meet the connection requirements of the conductive members 12. It can be understood that the shape and size of the extension member 13 can be designed according to the requirements of the specific connection position. The manufacturing method of the extension member 13 can refer to the manufacturing method of the conductive member 12. For example, the extension member 13 can be made of the same conductive material as the conductive member 12, or can be formed by sheet metal processes such as stamping and bending.

[0045] When connecting the extension member 13 and the connecting portion 122, preliminary connection positioning can be performed through mutually adapted pre-positioning structures, and then reinforced by means such as welding to ensure the reliability of the connection. Optionally, the pre-positioning structure can adopt a magnetic attraction structure. For example, as Figure 4 shown, a first magnetic attraction structure 1223 can be provided on the connecting portion 122, and a second magnetic attraction structure 131 can be provided on the extension member 13. By the mutual adsorption connection between the first magnetic attraction structure 1223 and the second magnetic attraction structure 131, the connection positioning between the extension member 13 and the connecting portion 122 can be achieved. In addition, the pre-positioning structure can also adopt a clamping structure or a plug-in connection or other means to achieve the connection, as long as it can at least meet the preliminary connection positioning between the extension member 13 and the connecting portion 122. Through the design of the pre-positioning structure, the extension member 13 and the connecting portion 122 assembly can be more conveniently and accurately positioned, which is beneficial to simplifying the assembly operation.

[0046] In the above embodiment, after the fixing portion 121 and the fixing base 11 are connected and fixed, by connecting the extension members 13 to the connecting portions 122 on the same side of any two conductive members 12 respectively, the three conductive members 12 form a structure with large ends and a small middle, so that it can not only meet the smooth assembly between the conductive members 12 arranged in a triangle and the fixing base 11, but also realize the connection between the connecting portions 122 at both ends of the conductive members 12 and the external structure. The design is ingenious and the assembly operation is simple. At the same time, by adopting a pre-positioning structure between the extension member 13 and the connecting portion 122, it is convenient for the connection positioning between the extension member 13 and the connecting portion 122, further simplifies the assembly operation, facilitates subsequent connection operations such as welding or screwing between the extension member 13 and the connecting portion 122, and also preferably ensures the accuracy of the connection position between the two.

[0047] In some embodiments, as Figure 5 shown, at least on the side of the fixing base 11 where the fixing portions 121 pass through, there is a partition protrusion 111, and the partition protrusion 111 at least separates the portions where the fixing portions 121 pass through from each other.

[0048] Specifically, since the three fixing portions 121 are arranged in a triangular distribution, the partition protrusion 111 can be correspondingly set in a triangular shape. For example, as Figure 5As shown, the separating protrusion 111 may include three partition walls 1111 arranged in a triangle to separate the fixing parts 121 from each other. Further, a limiting wall 1112 may be formed by extending outward at the connection of adjacent partition walls 1111. The limiting wall 1112 can define the position where the fixing part 121 is connected to the fixing base 11, facilitating connection and positioning. For the setting method of the separating protrusion 111, optionally, the separating protrusion 111 can be directly formed on the fixing base 11 or be an independent component assembled on the fixing base 11, as long as it can achieve the function of separating the fixing parts 121 from each other.

[0049] In the above embodiment, by setting the separating protrusion 111, it can be ensured that the fixing parts 121 are separated from each other, and it can play a role in isolation and insulation, ensuring that there is a sufficient safety distance between the conductive parts 12. At the same time, the separating protrusion 111 can also play a positioning role during the assembly of the fixing part 121 and the fixing base 11, facilitating the assembly and positioning operation.

[0050] In some embodiments, such as Figure 1 and Figure 2 as shown, the fixing base 11 includes a base 112 and a cover 113. The cover 113 is connected to the base 112, and at least a part of each fixing part 121 passes through between the cover 113 and the base 112. Among them, as Figure 6 shown, a first installation groove 1123 matching the number of the conductive parts 12 is formed through the base 112, and each conductive part 12 passes out from the corresponding first installation groove 1123.

[0051] Specifically, the cover 113 and the base 112 can be connected in a variety of ways. For example, as Figure 2 shown, positioning connection structures such as positioning pins 1121 and clamping positions 1122 can be provided on the base 112, and structures such as pin holes 1131 and buckles 1132 are correspondingly provided on the cover 113. By connecting the above structures in one-to-one correspondence, the positioning connection between the base 112 and the cover 113 can be achieved, and further reinforcement can be carried out by means of bolt connection, welding, etc.

[0052] It can be understood that three first installation grooves 1123 are formed corresponding to the number of the conductive parts 12, and the first installation grooves 1123 are distributed in a triangle along the direction perpendicular to the direction in which the fixing part 121 passes through. The adjacent first installation grooves 1123 are spaced apart from each other, so as to arrange the fixing parts 121 in a triangular arrangement and ensure a safety distance between the fixing parts 121.

[0053] In some implementation schemes, when the separating protrusion 111 is provided on the fixing base 11, the first installation groove 1123 can be formed around the outer periphery of the separating protrusion 111, as Figure 5As shown, the fixing portion 121 can be limited together with the separation protrusion 111 to improve the positioning accuracy. Of course, it is understandable that the fixing seat 11 can also only have the first installation groove 1123 without the separation protrusion 111, and the first installation groove 1123 alone can also play the role of positioning and separation.

[0054] In some embodiments, such as Figure 2 As shown, an annular groove 1124 is formed on the base 112 around each fixing portion 121 , and the three-phase electrical connection assembly 1 further includes an annular magnet 14 , which is disposed in the annular groove 1124 and sleeved on each fixing portion 121 .

[0055] Specifically, the annular magnet 14 is a component for suppressing electromagnetic interference, and can convert the electromagnetic energy of interference into heat through electromagnetic induction, thereby maintaining the stability of the circuit. The shape of the annular groove 1124 is adapted to the shape of the annular magnet 14, and can meet the installation requirements of the annular magnet 14. It can be understood that the fixing seat 11 has an outer ring side wall and an inner ring side wall forming the annular groove 1124, and the annular groove 1124 is formed between the outer ring side wall and the inner ring side wall. In some embodiments, such as Figure 6 As shown, when the fixing seat 11 is provided with a first installation groove 1123 , the first installation groove 1123 can be provided in the area surrounded by the inner ring side wall, so that the annular magnet 14 is sleeved on the outer side of each fixing portion 121 .

[0056] Optionally, in some embodiments, Figure 6 As shown, a limiting protrusion 11241 may be further provided in the annular groove 1124 , and the limiting protrusion 11241 abuts against the annular magnet 14 to limit the installation position of the annular magnet 14 , thereby facilitating the assembly and positioning of the annular magnet 14 .

[0057] It can be understood that since the embodiment of the present invention adopts a triangular distribution arrangement of the fixing parts 121, the space occupied by the conductive part 12 is greatly reduced, especially the space occupied by the conductive part 12 in a direction perpendicular to the direction passing through the fixing seat 11. Therefore, the annular magnet 14 mounted on the outside of each fixing part 121 only needs a smaller volume to meet the demand, thereby reducing the weight of the annular magnet 14 and saving manufacturing costs.

[0058] In some embodiments, such as Figure 5 and Figure 6As shown, the three-phase power connection component 1 further includes a heat conducting block 15 for performing heat exchange at least with the annular magnet 14. A second installation groove 11242 is formed through the outer side wall of the outer ring of the annular groove 1124 formed in the base 112, and the heat conducting block 15 is disposed in the second installation groove 11242. One side of the heat conducting block 15 facing the inside of the annular groove 1124 abuts against the annular magnet 14, and the other side of the heat conducting block 15 is for abutting against the heat dissipation structure.

[0059] Specifically, since the annular magnet 14 can convert interfering electromagnetic energy into heat through electromagnetic induction, in order to meet the heat dissipation requirements of the annular magnet 14, the heat conducting block 15 is provided to dissipate heat from the annular magnet 14. The heat conducting block 15 is installed in the second installation groove 11242, so that the opposite sides of the heat conducting block 15 are respectively located inside and outside the annular groove 1124. Among them, one side of the heat conducting block 15 facing the inside of the annular groove 1124 abuts against the annular magnet 14, and the side of the heat conducting block 15 facing the outside of the annular groove 1124 is for abutting against the heat dissipation structure. In this way, the heat generated by the annular magnet 14 can be conducted to the heat dissipation structure located outside the annular groove 1124, such as a housing structure in contact with the outside air or other cooling media, so as to realize the heat dissipation of the annular magnet 14. Optionally, in order to ensure close contact heat transfer between the heat conducting block 15 and the annular magnet 14 and the heat dissipation structure, heat conducting materials such as heat conducting glue can be filled between the heat conducting block 15 and the annular magnet 14, and / or between the heat conducting block 15 and the heat dissipation structure.

[0060] In some embodiments, as Figure 6 shown, the base 112 can be made by injection molding. Then, the heat conducting block 15 can be provided with an injection hole 151 for injecting plastic. After the base 112 is injection molded, the plastic in the injection hole 151 is integrated with the base 112, and thus the heat conducting block 15 can be fixed to the base 112. Of course, it can be understood that the connection and fixing manner between the base 112 and the heat conducting block 15 is not limited to the above manner, and other methods such as welding and bolt connection can be adopted according to the different materials of the base 112.

[0061] In some embodiments, as Figure 6 shown, a part of the outer side wall of the base 112 forming the annular groove 1124 bulges towards the direction of expanding the annular groove 1124 to form a perfusion space 11243 communicating with the annular groove 1124. The perfusion space 11243 is used for injecting sealing material into the annular groove 1124. Among them, a notch 11244 for the sealing material to flow through is formed on the inner side wall of the base 112 forming the annular groove 1124.

[0062] Specifically, when the cover 113 is assembled with the base 112, a sealing material such as sealant can be poured into the pouring space 11243 to achieve a fixed connection. At the same time, the sealing material can be filled in the annular groove 1124 and filled into the area enclosed by the inner ring side wall through the notch 11244, that is, the area where the fixing part 121 of the conductive part 12 is connected to the base 112, so as to achieve the sealing and fixing of the annular magnet 14 and the conductive part 12.

[0063] Optionally, to make the sealing material fill more fully, the cover 113, the magnetic ring 15 and the base 112 can be spaced 2-3 mm apart from each other in the height direction. This gap allows the sealing material to flow between the cover 113, the magnetic ring 15 and the base 112, so that the sealing material flows and fills the gap, thereby enabling the cover 113, the magnetic ring 15 and the base 112 to be reliably fixed.

[0064] Through the design of the above embodiments, injecting the sealing material into the annular groove 1124 through the pouring space 11243 can simultaneously achieve the fixed connection between the cover 113 and the base 112, the sealing and fixing of the annular magnet 14 and the sealing and fixing of the conductive part 12, without multiple pouring operations, simplifying the process flow. Moreover, when the sealing material solidifies and forms, it can effectively isolate external contaminants from entering the annular groove 1124, avoiding affecting components such as the annular magnet 14, thereby improving the protection performance. In addition, in the above structure, since the installation position of the annular magnet 14 and the installation position of the fixing part 121 are in the same height space, the overall height can be reduced, and the total weight and cost can be reduced. Compared with the related technology, the three-phase electrical connection component 1 designed as above can usually reduce the overall height dimension by 35% and reduce the total weight and cost by more than 20%.

[0065] In some embodiments, as Figure 5 shown, a sealing groove 1125 is formed on one side of the base 112 where each of the fixing parts 121 passes through, and the sealing groove 1125 is at least disposed around the outer periphery of the annular groove 1124. As Figure 2 shown, the three-phase electrical connection component 1 further includes a sealing ring 16, and the sealing ring 16 is disposed in the sealing groove 1125 and forms an interference fit with the sealing groove 1125. With this design, the sealing ring 16 and the sealing material in the annular groove 1124 jointly play a sealing role, which can further improve the sealing reliability.

[0066] In some embodiments, as Figure 2 and Figure 3 shown, a boost interface 1224 is provided on one connection part 122 of at least one conductive part 12, and the cover 113 forms a retaining wall 1133 around the boost interface 1224.

[0067] Specifically, the boost interface 1224 refers to an interface that applies IPT (Inductive Power Transfer) boost technology to achieve voltage boost. The boost interface 1224 can be connected to a specific load to provide a higher voltage to the load.

[0068] Considering the special position of the load connected to the boost interface 1224 during the assembly process of the three-phase power connection component 1. For example, when the three-phase power connection component 1 is applied to the electric drive system of an electric vehicle, the three-phase power connection component 1 is usually installed inside the housing of the electric drive system assembly, while the load connected to the boost interface 1224 is located outside the housing. In this case, it is necessary to extend fixing parts such as wires and bolts into the housing outside the housing for wiring and fixing operations. At this time, if a bolt accidentally falls, the bolt is likely to fall deep inside the housing and is not easy to take out, resulting in affecting the assembly work. To solve the above problems, in some embodiments, a retaining wall 1133 is formed around the boost interface 1224 on the cover 113 to block the falling bolts. Optionally, the retaining wall 1133 can be a three-sided retaining wall 1133 that surrounds the boost interface 1224 in three directions. When designed in this way, the surrounding range is large, and the effect of preventing bolts from falling is good. Moreover, the position not covered by the retaining wall 1133 can be used for wires to extend in, which is convenient for wire connection, and the design is ingenious.

[0069] In some embodiments, such as Figure 1 and Figure 2 shown, the three-phase power connection component 1 further includes a wiring harness assembly 17 at least for transmitting electric energy. A wiring harness installation hole 1126 is also formed on the base 112, and the wiring harness assembly 17 is passed through the wiring harness installation hole 1126. Specifically, the wiring harness assembly 17 can be used to connect a low-voltage DC load, so as to further integrate the transmission function of the low-voltage DC circuit on the basis of transmitting three-phase alternating current through the conductive member 12, and improve the functional diversity and integration degree of the three-phase power connection component 1.

[0070] It can be understood that the wiring harness assembly 17 can be correspondingly designed according to the specific form of the load, and the design is relatively flexible. As an example, in some implementation schemes, such as Figure 7 shown, the wiring harness assembly 17 can include a terminal fixing seat 171, a plurality of connection terminals 172, and a plurality of cables 173. One cable 173 is connected to each end of each connection terminal 172, and the connection between the cable 173 and the connection terminal 172 can adopt methods such as crimping.

[0071] Such as Figure 1 and Figure 2As shown, a wire harness sheath 174 is sleeved outside the wires 173 at the same end of each connection terminal 172. The wires 173 at the same end are gathered through the wire harness sheath 174 to connect the loads in the same circuit. For example, a connector 175 can be provided at one end of the wire harness to connect with the load. Please continue to refer to Figure 7 , a wire passing hole 1711 and a limiting groove 1712 are provided on the terminal fixing seat 171. The wire 173 at one end of the connection terminal 172 passes through the wire passing hole 1711, and the connection terminal 172 is clamped in the limiting groove 1712. After the wire harness assembly 17 is assembled, the terminal fixing seat 171 can be fixed in the wire harness installation hole 1126, and sealing treatment operations such as injecting sealing materials can be carried out. The above design can achieve reliable sealed connection of the wire harness assembly 17 in the wire harness installation hole 1126, effectively isolate external pollutants, and has a simple structure, is easy to assemble, and has a low component cost.

[0072] Optionally, a sealing lip 1713 can also be provided on the outer periphery of the terminal fixing seat 171. An interference fit is formed between the sealing lip 1713 and the wire harness installation hole 1126 to play a sealing role. When designed in this way, the sealing reliability can be further improved in combination with the sealing material.

[0073] In some embodiments, as Figure 1 and Figure 2 shown, at least one wire clamping groove 1134 is provided on the cover body 113. The wire harness sheath 174 is clamped in the wire clamping groove 1134. By providing the wire clamping groove 1134, the wire harness sheath 174 and the wires 173 in the wire harness sheath 174 can be fixed, reducing the problem of the wires 173 loosening due to external forces and improving the connection reliability.

[0074] Optionally, a plurality of wire clamping grooves 1134 can be provided along the arrangement path of the wire harness sheath 174, and at least some of the wire clamping grooves 1134 can be in opposite directions. When designed in this way, the wire harness sheath 174 is not easily loosened from the wire clamping groove 1134, and the stability of fixing the wire harness sheath 174 and the wires 173 can be further improved.

[0075] The embodiment of the present invention also provides a production method of a three-phase electrical connection component, including:

[0076] Manufacturing the cover body assembly. Three conductive parts 12 are formed by stamping, each conductive part 12 has a fixing part 121 and connecting parts 122 located at both ends of the fixing part 121. Then, the fixing parts 121 are distributed in a triangular manner, and then an injection molding process is carried out to form the cover body assembly; wherein, the cover body assembly includes a cover body 113 and three conductive parts 12;

[0077] For the production of the base, fix the positions of the required prefabricated parts, and then perform an injection molding process to form the base 112, and form three through first mounting grooves 1123 on the base 112. The quantity and distribution shape of each first mounting groove 1123 match those of each fixing part 121;

[0078] For the sealed assembly of the components, respectively pass the fixing part 121 of each conductive part 12 through the corresponding first mounting groove 1123, connect the cover body 113 assembly to the base 112, and then inject glue for sealing between the cover body 113 and the base 112;

[0079] For the assembly of the assembly, install the epitaxial part 13 onto the corresponding connecting part 122 after injection glue sealing, and weld and fix it. Then install the sealing ring 16 and the external wiring harness assembly 17 to complete the overall production of the three-phase electrical connection assembly 1.

[0080] In some embodiments, the production of the base includes: forming a partition protrusion 111 at a position adjacent to the first mounting groove 1123 on the base 112.

[0081] In some embodiments, the production of the cover body assembly includes: splitting out the epitaxial part 13 on two conductive parts 12 that can be connected to the connecting part 122. The production method further includes: after the sealed assembly of the components is completed, connect and fix the split epitaxial part 13 to the corresponding connecting part 122, so that the two epitaxial parts 13 extend in directions that increase the distance between them respectively.

[0082] In some embodiments, the production of the base includes: forming an annular groove 1124 around the first mounting groove 1123 on the base 112, and forming a second mounting groove 11242 on the outer side wall of the outer ring of the annular groove 1124 formed on the base 112, and then installing a heat conducting block 15 in the second mounting groove 11242.

[0083] In some embodiments, the production method further includes: the production of the heat conducting block, forming an injection hole 151 on the heat conducting block 15. The production of the base further includes: fixing the heat conducting block 15 on the mold for making the base 112, so that the position of the heat conducting block 15 corresponds to the position of the second mounting groove 11242 formed on the base 112, and forming the base 112 by an injection molding process. During injection molding, make the plastic enter the injection hole 151 to fix the heat conducting block 15 in the second mounting groove 11242.

[0084] In some embodiments, the production method further includes: manufacturing an annular magnet, designing the size of the annular magnet 14 according to the actual sizes of the three conductive members 12, and forming the annular magnet 14 from a heat-conducting material such as aluminum by die-casting. The sealed assembly of the components further includes: installing the annular magnet 14 in the annular groove 1124, making the heat-conducting block 15 abut against the annular magnet 14 on one side within the annular groove 1124, and filling a heat-conducting adhesive between the heat-conducting block 15 and the annular magnet 14. It should be noted that the size of the annular groove 1124 needs to be adapted to the size of the annular magnet 14 to ensure that the annular magnet 14 can be inserted.

[0085] In some embodiments, the manufacturing of the base further includes: making the outer side wall of a partial outer ring of the portion of the base 112 that forms the annular groove 1124 protrude in the direction of expanding the annular groove 1124 to form a perfusion space 11243 communicating with the annular groove 1124; forming a notch 11244 on the inner side wall of the base 112 that forms the annular groove 1124 for the sealed material to flow through.

[0086] In some embodiments, the manufacturing of the cover assembly includes: providing a boost interface 1224 on a connecting portion 122 of at least one conductive member 12, and forming a retaining wall 1133 around the boost interface 1224 on the cover 113.

[0087] In some embodiments, the production method further includes:

[0088] manufacturing the terminal fixing base, forming a wire threading hole 1711 and a limiting groove 1712 on the terminal fixing base 171, and providing a sealing lip 1713 on the outer periphery of the terminal fixing base 171;

[0089] assembling the wire harness assembly, connecting the cable 173 to the connecting terminal 172 by means such as crimping, threading the cable 173 at one end of the connecting terminal 172 through the wire threading hole 1711 on the terminal fixing base 171, and then clamping the connecting terminal 172 in the limiting groove 1712 of the terminal fixing base 171; sleeving a wire harness sheath 174 outside the cables 173 at the same end of each connecting terminal 172.

[0090] The manufacturing of the base includes: forming a wire harness installation hole 1126 on the base 112.

[0091] The overall assembly includes: passing the wire harness sheath 174 covering multiple cables 173 at the same end of each connecting terminal 172 through the wire harness installation hole 1126, and pressing the terminal fixing base 171 into the wire harness installation hole 1126 to form an interference fit between the sealing lip 1713 and the wire harness installation hole 1126.

[0092] The production method of the three-phase electrical connection component provided by the embodiments of the present invention enables the production of components such as the cover assembly, the base, the annular magnet, and the wire harness assembly to be carried out simultaneously. Finally, the components are assembled into a whole, with high production efficiency, suitable for large-scale production of the above-mentioned three-phase electrical connection component 1, and convenient to operate and easy to implement. The three-phase electrical connection component 1 produced by the above production method has a high degree of structural compactness, a light weight, and a low material cost.

[0093] The embodiments of the present invention also provide an electric drive system, which includes a drive motor, a power brick, and the above-mentioned three-phase electrical connection component 1. Two connection parts 122 of the same conductive part 12 are respectively connected to the drive motor and the power brick. Specifically, the drive motor is a component that provides power for mechanical devices such as vehicles, and the power brick is a power device for power conversion and energy management, which can adjust the magnitude of the output power to ensure the stable operation of the circuit load.

[0094] The embodiments of the present invention connect the drive motor and the power brick by adopting the above-mentioned three-phase electrical connection component 1 to form a complete electric drive system structure. The three-phase electrical connection component 1 has characteristics such as a compact structure and a high degree of integration by designing the layout of the conductive part 12, which is beneficial to reducing the overall volume of the electric drive system.

[0095] The embodiments of the present invention also provide a vehicle, which includes a vehicle body and the above-mentioned electric drive system, and the electric drive system is installed on the vehicle body. The vehicle provided by the embodiments of the present invention, by applying the above-mentioned electric drive system with the three-phase electrical connection component 1, makes the electric drive system small in volume, light in weight, and high in integration degree, thus being beneficial to improving the use performance of the vehicle.

[0096] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A three-phase electrical connection assembly, characterized in that: include: Fixed seat; There are three conductive members, each of which has a fixing portion and connecting portions located at both ends of the fixing portion, each of which penetrates from one side of the fixing seat and exits from the other opposite side, and the two connecting portions on each conductive member are exposed at opposite sides of the fixing seat respectively; Wherein, along a direction perpendicular to the direction in which each fixing portion passes through the fixing seat, each fixing portion is close to each other and distributed in a triangle, and is fixedly connected to the fixing seat; and a safety distance is provided between two adjacent fixing portions.

2. The three-phase electrical connection assembly according to claim 1, characterized in that: The three-phase electrical connection assembly also includes: Extension pieces, in any two of the conductive pieces, the connection parts located on the same side of the fixing seat are respectively connected with the extension pieces, and the two extension pieces respectively extend in a direction of increasing the distance between them; Wherein, a pre-positioning structure is arranged between the extension piece and the connecting portion.

3. The three-phase electrical connection assembly according to claim 1, characterized in that: A separation protrusion is provided at least on one side of the fixing seat where each fixing part passes through, and the separation protrusion at least separates the parts through which each fixing part passes from each other.

4. The three-phase electrical connection assembly according to claim 1, characterized in that: The fixing seat comprises: Base; A cover body connected to the base, wherein each of the fixing parts is at least partially disposed between the cover body and the base; The base is provided with first installation slots whose number matches the number of the conductive elements, and each conductive element passes through the corresponding first installation slot.

5. The three-phase electrical connection assembly according to claim 4, characterized in that: An annular groove is formed on the base around each of the fixing parts; Wherein, the three-phase electrical connection assembly further includes an annular magnet, which is arranged in the annular groove and sleeved on each of the fixing parts.

6. The three-phase electrical connection assembly according to claim 5, characterized in that: The three-phase electrical connection assembly also includes: A heat-conducting block, used for performing heat exchange at least with the annular magnet; Among them, a second installation groove is penetrated on the outer ring side wall of the annular groove formed by the base, and the heat conductive block is arranged in the second installation groove. The side of the heat conductive block facing the annular groove abuts against the annular magnet, and the other side of the heat conductive block is used to abut against the heat dissipation structure.

7. The three-phase electrical connection assembly according to claim 5, characterized in that: The outer side wall of the base forming the annular groove protrudes in the direction of expanding the annular groove to form a pouring space connected to the annular groove, and the pouring space is used for injecting sealing material into the annular groove; Wherein, a notch is provided on the inner ring side wall of the base forming the annular groove, through which the sealing material can flow.

8. The three-phase electrical connection assembly according to claim 4, characterized in that: A boost interface is provided on one of the connecting parts of at least one of the conductive members; Wherein, the cover body forms a retaining wall around the boost interface.

9. The three-phase electrical connection assembly according to claim 4, characterized in that: The three-phase electrical connection assembly also includes: A wiring harness assembly, at least for transmitting electrical energy; Wherein, a wiring harness installation hole is also provided on the base, and the wiring harness assembly is passed through the wiring harness installation hole.

10. A method for producing a three-phase electrical connection assembly, characterized in that: include: The cover assembly is manufactured by forming three conductive parts by stamping, so that each conductive part has a fixing part and connecting parts at both ends of the fixing part, and then the fixing parts are distributed in a triangular manner, and then an injection molding process is performed to form the cover assembly; The base is made by fixing the positions of the required prefabricated parts, and then performing an injection molding process to form the base, and three penetrating first installation grooves are formed on the base, and the number and distribution shape of each of the first installation grooves match the fixing parts; Sealing assembly of the assembly, inserting the fixing portion of each of the conductive members into the corresponding first mounting groove, connecting the cover assembly to the base, and then injecting glue to seal between the cover and the base; The assembly is assembled, the extension part is installed on the corresponding connection part after the glue injection and sealing, and is fixed by welding, and then the sealing ring and the external wiring harness assembly are installed to complete the overall production of the three-phase electrical connection assembly.

11. The production method according to claim 10, characterized in that The manufacturing of the base includes: forming a separation protrusion on the base at a position adjacent to the first installation groove.

12. The production method according to claim 10, characterized in that The manufacturing of the cover assembly includes: splitting two of the conductive parts into extension parts that can be connected to the connecting parts; Wherein, the production method further comprises: after the sealing assembly of the component is completed, the split extension parts are connected and fixed to the corresponding connecting parts, so that the two extension parts extend in the direction of increasing the distance between them.

13. The production method according to claim 10, characterized in that The manufacturing of the base includes: forming an annular groove around the first installation groove on the base, and forming a second installation groove on the outer ring side wall of the base forming the annular groove; and installing a heat conduction block in the second installation groove.

14. The production method according to claim 13, characterized in that The production of the base also includes: protruding part of the outer ring side wall of the base forming the annular groove in the direction of expanding the annular groove to form a pouring space connected to the annular groove; and forming a gap for the circulation of sealing material on the inner ring side wall of the base forming the annular groove.

15. The production method according to claim 10, characterized in that The manufacturing of the cover assembly includes: providing a boost interface on one of the connecting parts of at least one of the conductive members, and forming a retaining wall around the boost interface on the cover.

16. An electric drive system, characterized in that: It comprises a driving motor, a power brick and a three-phase electrical connection assembly as claimed in any one of claims 1 to 9; Wherein, the two connecting parts of the same conductive member are respectively connected to the driving motor and the power brick.

17. A vehicle, characterized in that: The invention comprises a vehicle body and the electric drive system as claimed in claim 16, wherein the electric drive system is mounted on the vehicle body.

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