Power connector

Abstract

The invention relates to an electric power connector, which comprises at least two pressing plates, two groups of slot assemblies are formed between two adjacent pressing plates, each group of slot assembly comprises a plurality of slots, a socket is arranged in each slot, and the sockets can move in the length direction, the width direction and the thickness direction of the pressing plates in the slots. The slot wall of the slot can limit the socket in the length direction, the width direction and the thickness direction of the pressing plate; the two symmetrically arranged slots in the two groups of slot assemblies are communicated through a middle channel, and the two symmetrically arranged sockets are fixedly connected through a metal flexible piece; the slotting tools of one busbar group can be inserted into the corresponding sockets through the corresponding slots in one slot assembly, and the slotting tools of the other busbar group can be inserted into the corresponding sockets through the corresponding slots in the other slot assembly. The electric power connector can reduce the influence of various stress environments on the reliability and the service life of the connector.

Description

Technical Field

[0001] The present invention relates to the technical field of power electronics, and in particular to a power connector. Background Art

[0002] Connectors are mainly devices that connect and separate two parts. The quality of their connection performance is directly related to whether the entire connected power electronic system can operate safely and reliably. With the rapid development of the rail transit industry, the application scope of vehicles continues to expand, and with the increase in speed levels and the demand for lightweight, higher and higher requirements are placed on the application environment and performance level of connectors.

[0003] In order to ensure the connection quality, the fork connector used in the existing power module assembly has relatively high production and installation process tolerance requirements for the box busbar and fork knife connected thereto, that is, the relative position tolerance of the box busbar fork knife and the power module busbar is relatively small. However, in actual use, even if the design requirements are met after installation, due to the influence of environmental factors during vehicle operation (for example, vibration shock, temperature change, humidity change, etc.), the position between the mutually matching fork knife and the connector often moves, causing the connector socket and other components to be affected by various stresses, which may increase friction loss and reduce service life, or even cause the fork knife and other components to loosen, causing arcing, excessive thermal stress and other failures, and then cause the power module to fail or explode, affecting the operation of the train. Summary of the invention

[0004] The object of the present invention is to provide a power connector which can reduce the influence of various stress environments on the reliability and life of the connector.

[0005] The object of the present invention is achieved in this way. An electric power connector is used to connect two groups of busbar groups, each group of busbar groups includes a plurality of blades; the electric power connector includes at least two stacked pressure plates, two groups of slot assemblies arranged symmetrically are formed between two adjacent pressure plates, each group of slot assemblies includes a plurality of slots arranged at intervals along the length direction of the pressure plate, each slot is provided with a socket, the socket can move in the slot along the length direction, width direction and thickness direction of the pressure plate, and the slot wall of the slot can limit the socket in the length direction, width direction and thickness direction of the pressure plate; the two symmetrically arranged slots in the two groups of slot assemblies are connected through an intermediate channel, and the two symmetrically arranged sockets are fixedly connected by a metal flexible member, and the metal flexible member is located in the corresponding intermediate channel; the blades of one group of busbar groups can be plugged into the corresponding sockets through the corresponding slots in one group of slot assemblies, and the blades of the other group of busbar groups can be plugged into the corresponding sockets through the corresponding slots in the other group of slot assemblies.

[0006] In a preferred embodiment of the present invention, the metal flexible member is a sheet-like structure or a strip-like structure.

[0007] In a preferred embodiment of the present invention, the metal flexible member is made of copper or aluminum.

[0008] In a preferred embodiment of the present invention, the metal flexible member and the socket are fastened by fasteners or fixed by welding.

[0009] In a preferred embodiment of the present invention, a groove is provided on the plate surface of one of the two adjacent pressure plates, and the groove and the plate surface of the other one are combined to form a slot, and the socket portion can be inserted into the groove, and the interval between the two adjacent pressure plates and the portion located between the two symmetrically arranged slots constitute an intermediate channel.

[0010] In a preferred embodiment of the present invention, the pressing plate is an insulating plate.

[0011] In a preferred embodiment of the present invention, two adjacent pressing plates are fastened by fasteners or clamped by a snap-fit ​​structure.

[0012] In a preferred embodiment of the present invention, the socket has a socket in which a conductive spring group is arranged. The conductive spring group includes an upper spring and a lower spring arranged oppositely. The inserting knife can be inserted and pressed between the upper spring and the lower spring of the conductive spring group.

[0013] In a preferred embodiment of the present invention, the socket is made of copper or aluminum.

[0014] In a preferred embodiment of the present invention, the number of the pressure plates is three, and each group of slot assemblies includes two slots.

[0015] As described above, the power connector of the present invention designs the socket into a movable connection structure that can move freely in the slot, so that the blades on the same side of the pressure plate can be reliably connected even if there is a deviation; the two symmetrically arranged sockets are connected through a metal flexible part, and the metal flexible part can withstand movement or slight rotation in the length, width and thickness directions of the pressure plate, so that even if there is relative displacement or rotation between the two blades plugged in the two symmetrically arranged sockets, their conductive performance and reliability are not affected. Therefore, it can not only reduce the installation accuracy requirements of the blades of the two busbar groups during installation, but also reduce the impact of various stresses on their reliability during engineering use, thereby improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0017] in:

[0018] Figure 1 : A three-dimensional schematic diagram of the power connector provided by the present invention.

[0019] Figure 2 : A schematic top view of the power connector provided by the present invention.

[0020] Figure 3 : It is a schematic front view of the power connector provided by the present invention.

[0021] Figure 4 :for Figure 3 Section view along AA.

[0022] Description of Figure Numbers:

[0023] 1. Pressing plate; 10. Groove; 11. First pressing plate; 12. Second pressing plate; 13. Third pressing plate;

[0024] 2. Slot;

[0025] 3. Middle channel;

[0026] 4. socket; 40. conductive spring assembly; 41. first socket; 42. second socket; 43. third socket; 44. fifth socket; 45. sixth socket; 46. seventh socket;

[0027] 5. Metal flexible parts;

[0028] 61, busbar plug of the first module; 62, busbar plug of the second module; 63, busbar plug of the third module; 64, busbar plug of the fourth module;

[0029] 71. Busbar plug of the first box; 72. Busbar plug of the second box; 73. Busbar plug of the third box; 74. Busbar plug of the fourth box. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0031] like Figures 1 to 4 As shown, this embodiment provides a power connector for connecting two busbar groups, each busbar group including a plurality of blades.

[0032] The power connector includes at least two stacked pressure plates 1, and two groups of slot components are symmetrically arranged between the two adjacent pressure plates 1. Each group of slot components includes a plurality of slots 2 arranged at intervals along the length direction of the pressure plate 1. Each slot 2 is provided with a socket 4. The socket 4 can be arranged in the slot 2 along the length direction, width direction and thickness direction of the pressure plate 1 (i.e. Figure 3 and Figure 4The socket 4 can be moved in the X direction, Z direction and Y direction shown in the figure, and the slot wall of the slot 2 can limit the socket 4 in the length direction, width direction and thickness direction of the pressure plate 1; the two symmetrically arranged slots 2 in the two groups of slot assemblies are connected through the middle channel 3, and the two symmetrically arranged sockets 4 are fixedly connected by a metal flexible part 5, and the metal flexible part 5 is located in the corresponding middle channel 3; the blades of one group of busbar groups can be plugged into the corresponding sockets 4 through the corresponding slots 2 in one group of slot assemblies, and the blades of the other group of busbar groups can be plugged into the corresponding sockets 4 through the corresponding slots 2 in the other group of slot assemblies.

[0033] It can be understood that the number of blades in the two groups of busbar groups is the same, the number of slots 2 in the two groups of slot assemblies symmetrically arranged relative to the length direction of the pressure plate 1 is the same, and the two blades plugged into the two symmetrically arranged slots 2 should be the same connection electrode. When the number of pressure plates 1 is greater than two, the two groups of slot assemblies formed between two adjacent pressure plates 1 are counted as a layer of slot layer groups, and the number of slots 2 in different slot layer groups can be the same or different, depending on the specific needs. The specific size of the slot 2 should ensure that the slot 2 can move freely therein, but cannot fall out. The slot 2 is arranged to face the outside of one side of the pressure plate 1 and is connected to the outside to facilitate the insertion of the blade through the slot.

[0034] Therefore, the power connector in this embodiment designs the socket 4 as a movable connection structure that can move freely in the slot 2, so that the blades on the same side of the pressure plate 1 can be reliably connected even if there is a deviation; the two symmetrically arranged sockets 4 are connected through the metal flexible part 5, and the metal flexible part 5 can withstand movement or slight rotation in the length direction, width direction and thickness direction of the pressure plate 1, so that even if there is relative displacement or rotation between the two blades plugged in the two symmetrically arranged sockets 4, their conductive performance and reliability are not affected. In this way, not only can the installation accuracy requirements of the blades of the two busbar groups be reduced during installation, but also the influence of various stresses (mechanical installation stress, vibration shock, temperature change, humidity change and other environmental stresses) on its reliability during engineering use is reduced, thereby improving the service life.

[0035] In a specific implementation, the above-mentioned metal flexible part 5 can be a sheet structure (such as a thin sheet), a strip structure, or other shapes. The material of the metal flexible part 5 can be a metal material with good conductivity such as copper, aluminum or alloy. The connection between the metal flexible part 5 and the socket 4 can be fastened by fasteners (such as screws), or fixed by welding (soldering, vacuum brazing, stir friction welding, spot welding, etc.), or connected by various other processes.

[0036] The above-mentioned slot 2 can be realized in this way: a groove 10 is provided on the plate surface of one of the two adjacent pressing plates 1, and the groove 10 and the plate surface of the other one are enclosed to form the slot 2, and part of the socket 4 can be inserted in the groove 10, and the interval between the two adjacent pressing plates 1 and the part located between the two symmetrically arranged slots 2 constitute the middle channel 3. A groove structure is provided on one of the two adjacent pressing plates 1, and a space (i.e., slot 2) is formed with the other pressing plate 1 to accommodate the socket 4, ensuring that the socket 4 can move freely in the space (X, Y, Z directions) but cannot fall out. Of course, the above-mentioned slot 2 can also be formed by other processing methods, and this embodiment is only for example.

[0037] The above-mentioned pressing plate 1 should be an insulating plate, and the material should be an insulating material, such as SMC (sheet molding compound), BMC (bulk molding compound), etc. The connection and fixation between adjacent pressing plates 1 can be adopted in any way, such as fastening by fasteners, or snap-on connection by a snap-on structure. The shape of the pressing plate 1 is generally a rectangular plate.

[0038] Further, see Figure 4 The socket 4 has a socket in which a conductive spring group 40 is arranged. The conductive spring group 40 includes an upper spring and a lower spring arranged oppositely. The inserting knife can be inserted and pressed between the upper spring and the lower spring of the conductive spring group 40.

[0039] The socket 4 can be made of a metal material with good conductivity, such as copper or aluminum, and the above-mentioned blade is generally made of a metal material with good conductivity, such as copper or aluminum. The socket 4 has a conductive spring group 40 that fits tightly with the blade and has good conductivity. The spring shape can be scale-type, torsion spring-type, etc., or other existing forms. During installation, the blade and the socket 4 are pressed together through the conductive spring group 40 to transfer electrical energy. This structure can expand the blade position tolerance and reduce installation stress.

[0040] The number of pressing plates 1 and the number of slots 2 can be determined according to actual needs. Two adjacent pressing plates 1 form a layer. When the number of pressing plates 1 is greater than two, a multi-layer structure can be formed. The corresponding inserts can be directly plugged in and out without causing interference problems with bolt installation, and the operation is simple. In a preferred embodiment, the number of pressing plates 1 is three, and each group of slot components includes two slots 2.

[0041] For two groups of busbar groups, in some embodiments, one of the busbar groups is a module busbar group, and the other busbar group is a cabinet busbar group.

[0042] The following takes the example that the number of pressure plates 1 is three, each group of slot assemblies includes two slots 2, and the two groups of busbar groups are module busbar groups and box busbar groups, respectively, to describe the installation and working principle of the electrical connector of this embodiment in detail, as follows:

[0043] The three pressure plates 1 are respectively recorded as the first pressure plate 11, the second pressure plate 12 and the third pressure plate 13, the module busbar group includes the first module busbar blade 61, the second module busbar blade 62, the third module busbar blade 63 and the fourth module busbar blade 64, and the box busbar group includes the first box busbar blade 71, the second box busbar blade 72, the third box busbar blade 73 and the fourth box busbar blade 74.

[0044] Two symmetrical groups of slot assemblies are formed between the first pressing plate 11 and the second pressing plate 12. Each group of slot assemblies includes two slots 2 arranged at intervals along the length direction of the pressing plate 1. Four sockets 4 are respectively arranged in the four slots 2, namely the first socket 41, the second socket 42, the third socket 43 and the fourth socket; the first socket 41 and the third socket 43 are arranged symmetrically and a flexible metal part is installed between them, and the second socket 42 and the fourth socket are arranged symmetrically and a flexible metal part is installed between them. Four grooves 10 are opened on the plate surface of the second pressing plate 12 facing the first pressing plate 11. The first socket 41 to the fourth socket are placed in the corresponding grooves 10. The first socket 41 to the fourth socket can move in the corresponding cavity (i.e., the slot 2) between the first pressing plate 11 and the second pressing plate 12 (specifically, they can move in the X direction, the Y direction and the Z direction).

[0045] Similarly, four grooves 10 are provided on one side of the second pressing plate 12 facing the third pressing plate 13 to form four slots 2 between the second pressing plate 12 and the third pressing plate 13, and four sockets 4 are provided, namely, the fifth socket 44, the sixth socket 45, the seventh socket 46 and the eighth socket. The fifth socket 44 and the seventh socket 46 are symmetrically arranged with a flexible metal piece installed therebetween, and the sixth socket 45 and the eighth socket are symmetrically arranged with a flexible metal piece installed therebetween. The fifth socket 44 to the eighth socket can move in the corresponding slots 2 (specifically, they can move in the X direction, the Y direction and the Z direction). The first module busbar blade 61, the second module busbar blade 62, the third module busbar blade 63 and the fourth module busbar blade 64 are respectively plugged into the first socket 41, the second socket 42, the fifth socket 44 and the sixth socket 45, and the first box busbar blade 71, the second box busbar blade 72, the third box busbar blade 73 and the fourth box busbar blade 74 are respectively plugged into the third socket 43, the fourth socket, the seventh socket 46 and the eighth socket.

[0046] Two symmetrically arranged sockets 4 form a pair, and the connector is provided with four pairs of sockets. When the connector is in use, the first socket 41 and the second socket 42 can be connected in parallel as a P pole, and the fifth socket 44 and the sixth socket 45 can be connected in parallel as an N pole; or, the first socket 41 to the fourth socket can be connected in parallel (to increase the output current); or, the first socket 41 and the second socket 42 can be connected in parallel as an O pole, the fifth socket 44 can be a P pole, and the sixth socket 45 can be an N pole; the specific connection method depends on actual needs.

[0047] Therefore, the first socket 41 and the third socket 43 can move in the cavity between the first pressing plate 11 and the second pressing plate 12, and the fifth socket 44 and the seventh socket 46 can move in the cavity between the second pressing plate 12 and the third pressing plate 13; therefore, the first box busbar blade 71 and the third box busbar blade 73 on the same side can be reliably connected even if there is a deviation. Since the first socket 41 and the third socket 43 are connected by a flexible metal part, the first box busbar blade 71 and the first module busbar blade 61 of the same pole can be reliably connected even if there is a deviation on the plane.

[0048] That is, even if there is relative displacement between the first box busbar blade 71, the third box busbar blade 73, the first module busbar blade 61 and the third module busbar blade 63, it will not affect the reliable connection between the blade and the socket 4. The same is true for the remaining blades.

[0049] During operation (when the vehicle is running), even if the blades and the socket 4 are deformed due to environmental changes such as vibration impact, temperature change, load change, etc. between the power module and the box busbar, the stress (mainly mechanical and thermal stress) can be eliminated through the connection of the metal flexible part 5 between the first socket 41 and the third socket 43, and the deformation of the spring in the socket 4. Similarly, the fifth socket 44 and the seventh socket 46 in the lower layer also adopt the above structure, so that the tolerance between different blades in the box busbar or module busbar can also be reduced. The same applies to the remaining socket 4 positions.

[0050] Furthermore, during installation and vehicle operation, even if there is a deviation between the box busbar and the module busbar, it will not cause mechanical stress to the socket 4, ensuring the reliability of the electrical connection and extending the life of the connector. The entire power connector, while ensuring reliable connection, reduces the impact of various stress environments on the reliability and life of the connector, effectively improving the reliability and service life of the connection.

[0051] The above are only exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A power connector for connecting two busbar groups, each busbar group comprising a plurality of blades; characterized in that: The power connector comprises at least two stacked pressure plates, two groups of slot assemblies arranged symmetrically are formed between two adjacent pressure plates, each group of slot assemblies comprises a plurality of slots arranged at intervals along the length direction of the pressure plate, each of the slots is provided with a socket, the socket can move in the slot along the length direction, width direction and thickness direction of the pressure plate, and the slot wall of the slot can limit the socket in the length direction, width direction and thickness direction of the pressure plate; The two symmetrically arranged slots in the two groups of slot assemblies are connected by an intermediate channel, and the two symmetrically arranged sockets are fixedly connected by a metal flexible part, and the metal flexible part is located in the corresponding intermediate channel; the blades of one group of the busbar groups can be plugged into the corresponding sockets through the corresponding slots in one group of the slot assemblies, and the blades of the other group of the busbar groups can be plugged into the corresponding sockets through the corresponding slots in the other group of the slot assemblies.

2. The power connector according to claim 1, characterized in that: The metal flexible member is a sheet-like structure or a strip-like structure.

3. The power connector according to claim 1, characterized in that: The material of the metal flexible part is copper or aluminum.

4. The power connector according to claim 1, wherein: The metal flexible member is fastened to the socket by fasteners or welded.

5. The power connector according to claim 1, wherein: A groove is provided on the plate surface of one of the two adjacent pressure plates, and the groove and the plate surface of the other one are combined to form the slot, and part of the socket can be inserted into the groove. The interval between the two adjacent pressure plates and the part located between the two symmetrically arranged slots constitute the middle channel.

6. The power connector according to claim 1, wherein: The pressing plate is an insulating plate.

7. The power connector according to claim 1, wherein: Two adjacent pressing plates are fastened by fasteners or clamped by a snap-fit ​​structure.

8. The power connector according to claim 1, wherein: The socket has an insertion hole in which a conductive spring group is arranged. The conductive spring group includes an upper spring and a lower spring arranged oppositely. The inserting knife can be inserted and pressed between the upper spring and the lower spring of the conductive spring group.

9. The power connector according to claim 1, wherein: The socket is made of copper or aluminum.

10. The power connector according to claim 1, wherein: The number of the pressure plates is three, and each group of the slot assemblies includes two slots.

Images