L-shaped high-low voltage connecting assembly

Abstract

The utility model relates to an L-shaped high and low voltage connecting assembly, including internal three-phase copper bar and external copper bar injection molding, the internal three-phase copper bar includes inverter end three-phase switching terminal (3) and motor end three-phase switching terminal (6), the external copper bar injection molding is L-shaped, the turning position is provided with a platform, the platform is provided with a low voltage connector (2), and the low voltage connector (2) is connected with the external copper bar injection molding. A magnetic ring (7) is arranged on the inverter end three-phase conversion terminal (3), and a sealing ring (5) is sleeved on an external copper bar injection molding part, close to the motor end three-phase conversion terminal (6), of the platform. Compared with the prior art, the connecting assembly is compact in structure and excellent in sealing performance, solves the problem of complex design of a wire holder between a motor and a controller, can realize connection of alternating-current high-voltage copper bars of the motor and the controller in a limited space, and improves the flexibility and functional diversity of the connecting assembly.

Description

Technical Field

[0001] This utility model relates to the field of high and low voltage connection technology, and in particular to an L-shaped high and low voltage connection component. Background Technology

[0002] Currently, the design of the connection socket between the motor and controller of new energy vehicles is relatively complex. The terminal has three wires coming out from the housing and connecting to the controller. The integration level of the terminal is low, which not only affects the overall structural compactness, but may also increase the difficulty and risk of later maintenance. At the same time, it also poses a certain technical challenge to achieving efficient and safe operation of the vehicle.

[0003] Existing connector technology has certain drawbacks:

[0004] 1) The structure and function are relatively simple and lack flexibility; for example, patent application CN113241884A discloses a three-phase terminal block for an electric drive system and a vehicle. This three-phase terminal block includes: a controller terminal block, which is plugged into the motor housing. The controller terminal block integrates a low-voltage pin connector, a high-voltage copper pillar, and a magnetic ring. The low-voltage pin connector and the high-voltage copper pillar are integrally injection molded with the controller terminal block. The first end of the low-voltage pin connector is connected to the control board, and the second end of the low-voltage pin connector passes through the controller terminal block to form a slot. A resolver signal connector and a temperature signal connector are both plugged into the slot and connected to the control board. The end of the high-voltage copper pillar extends out of the controller terminal block to form a copper busbar connector, and the magnetic ring is fitted around the outer circumference of the high-voltage copper pillar. A three-phase motor busbar is fixedly connected to the copper busbar connector and is connected to the temperature signal connector. However, this structure and function are relatively simple and lack flexibility, failing to meet the complex functional requirements of new energy vehicles.

[0005] 2) In connection ends with magnetic rings, the sealing effect and robustness of traditional end face and radial sealing rings need to be improved when facing complex environments;

[0006] 3) When faced with harsh working conditions such as high-intensity mechanical impact and chemical corrosion, traditional end face and radial seals are not stable and durable enough in the face of harsh environments. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an L-shaped high and low voltage connection component, which improves the flexibility and functional versatility of the connection component.

[0008] The objective of this utility model can be achieved through the following technical solutions:

[0009] An L-shaped high-low voltage connection assembly includes an internal three-phase copper busbar and an external copper busbar injection molded part. The internal three-phase copper busbar includes an inverter-side three-phase adapter terminal and a motor-side three-phase adapter terminal. The external copper busbar injection molded part is L-shaped, with a platform at the bend. A low-voltage connector is mounted on the platform. A magnetic ring is mounted on the inverter-side three-phase adapter terminal. A sealing ring is fitted on the external copper busbar injection molded part near the motor-side three-phase adapter terminal on the platform.

[0010] Furthermore, the low-voltage connector includes a first connection terminal, a second connection terminal, and a protective structure. The first connection terminal is connected to the three-phase adapter terminal of the inverter, and the second connection terminal is connected to the three-phase adapter terminal of the motor.

[0011] Furthermore, the sealing ring is a cylindrical seal.

[0012] Furthermore, the platform is also provided with mounting holes, through which the external copper busbar injection molded part is fixed to the motor housing.

[0013] Furthermore, the low-pressure connector and magnetic ring are encapsulated in the external copper busbar injection molded part using epoxy resin.

[0014] Furthermore, the external copper busbar injection molded part is provided with a sealing groove for the sealing ring to fit into.

[0015] Furthermore, the three-phase copper busbar comprises three parallel copper busbars, which are separated by the external copper busbar injection molding part.

[0016] Furthermore, the three-phase adapter terminal at the motor end is provided with a copper busbar riveting nut.

[0017] Furthermore, the inverter end three-phase adapter terminal is provided with a copper busbar riveting nut or an adapter copper post, and the adapter copper post is provided with a threaded hole.

[0018] Furthermore, the three-phase adapter terminal of the inverter is riveted to the AC busbar of the inverter through the adapter copper post.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This utility model sets the connection component in an L-shape, with the internal three-phase copper busbar including a three-phase adapter terminal at the motor end and a three-phase adapter terminal at the inverter end. According to the specific actual installation needs, the rotation direction of the external copper busbar injection molded part and the internal three-phase copper busbar at the inverter end can be adjusted to achieve flexible installation of the connection component and the inverter, which greatly improves the flexibility and application range of the connection component.

[0021] 2. By introducing a cylindrical seal, this utility model greatly enhances the sealing effect and robustness of the connecting components, effectively preventing the intrusion of external water and oil, ensuring the safety and reliability of the electrical system. By combining a magnetic ring on the connecting components, electromagnetic interference is effectively reduced. By integrating low-voltage signal terminals, the structural setup is simplified to the greatest extent. While ensuring a compact structure, it also has the ability to resist chemical corrosion and high-intensity mechanical impact. Attached Figure Description

[0022] Figure 1 This is a side view of the L-shaped high-low voltage connection assembly proposed in this utility model;

[0023] Figure 2 This is a top view of the L-shaped high-low voltage connection assembly proposed in this utility model;

[0024] Figure 3 This is a cross-sectional view of a low-voltage connector.

[0025] Figure 4 The diagram below shows the structure of the L-shaped high and low voltage connection assembly in Example 2. (4a) is an exploded view of the L-shaped high and low voltage connection assembly, and (4b) is a structural diagram of the internal three-phase copper busbar of the L-shaped high and low voltage connection assembly.

[0026] Figure 5 This is a schematic diagram of the structure of the L-shaped high-low voltage connection assembly in Example 3, wherein (5a) is an exploded view of the L-shaped high-low voltage connection assembly, and (5b) is a top view of the L-shaped high-low voltage connection assembly;

[0027] Figure 6 The diagram below shows the structure of the L-shaped high and low voltage connection assembly in Example 4. (6a) is a side view of the L-shaped high and low voltage connection assembly, (6b) is a top view of the L-shaped high and low voltage connection assembly, and (6c) is a structural diagram of the internal three-phase copper busbar of the L-shaped high and low voltage connection assembly.

[0028] Legend: 1. Type 1 copper busbar injection molding part; 2. Low-voltage connector; 21. First connection terminal; 22. Second connection terminal; 23. Protective structure; 3. Inverter-side three-phase conversion terminal; 4. Mounting hole; 5. Sealing ring; 6. Motor-side three-phase conversion terminal; 7. Magnetic ring; 8. Type 2 copper busbar injection molding part; 81. Type 2 three-phase copper busbar; 82. Copper busbar riveting nut; 9. Type 3 copper busbar injection molding part; 10. Type 3 inverter-side three-phase conversion terminal; 11. Type 3 motor-side three-phase conversion terminal; 12. Adapter copper column; 13. Type 4 copper busbar injection molding part; 14. Type 4 motor-side three-phase conversion terminal; 15. Type 4 three-phase copper busbar. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0030] Example 1

[0031] This embodiment provides an L-shaped high-low voltage connection assembly, such as... Figure 1 As shown, it includes internal three-phase copper busbars and external copper busbar injection molded parts. The internal three-phase copper busbars include inverter-side three-phase adapter terminals 3 and motor-side three-phase adapter terminals 6. The external copper busbar injection molded parts are L-shaped, such as... Figure 2 As shown, a platform is provided at the turning point, and a low-voltage connector 2 is installed on the platform. A sealing ring 5 is fitted onto the external copper busbar injection molded part near the three-phase conversion terminal 6 at the motor end of the platform. Figure 3 As shown, the low-voltage connector 2 includes a first connecting terminal 21, a second connecting terminal 22, and a protective structure 23. The first connecting terminal 21 is connected to the three-phase adapter terminal 3 on the inverter side, and the second connecting terminal 22 is connected to the three-phase adapter terminal 6 on the motor side. The sealing ring 5 is a cylindrical seal. Figure 2 As shown, the platform also has mounting holes 4, through which the external copper busbar injection molded parts are fixed to the motor housing. The low-voltage connector 2 and the magnetic ring 7 are encapsulated in the external copper busbar injection molded parts using epoxy resin. Sealing grooves for the sealing ring 5 are provided on the external copper busbar injection molded parts. The three-phase copper busbar includes three parallel copper busbars, separated by the external copper busbar injection molded parts. A copper busbar riveting nut 82 is provided on the motor-side three-phase adapter terminal 6. A copper busbar riveting nut 82 or an adapter copper post 12 is provided on the inverter-side three-phase adapter terminal 3, with threaded holes on the adapter copper post 12. The inverter-side three-phase adapter terminal 3 is riveted to the inverter AC copper busbar via the adapter copper post 12.

[0032] Based on specific installation needs, by adjusting the rotation direction of the external copper busbar injection molded parts and the internal three-phase copper busbar at the inverter end, flexible installation of the connection components and inverter can be achieved, greatly improving the flexibility and application range of the connection components.

[0033] The position of the three-phase adapter terminal on the motor end can remain unchanged, while the position of the three-phase adapter terminal on the inverter end can be designed in two forms: horizontal and vertical.

[0034] The L-type high and low voltage connection assembly can be designed in two ways: left-hand and right-hand.

[0035] In this embodiment, the L-shaped high and low voltage connection components are arranged to the left, and the corresponding power modules of the inverter are placed vertically.

[0036] Example 2

[0037] This embodiment provides a variant structure of the L-shaped high-low voltage connection assembly described in Embodiment 1, such as... Figure 4 As shown, the L-shaped high and low voltage connection components are arranged to the left, and the power modules of the inverter are placed horizontally.

[0038] The overall structure of the L-shaped high-low voltage connection assembly in this embodiment is different from that in Embodiment 1, except that the connection direction of the three-phase adapter terminal 3 at the inverter end has been changed by 90°.

[0039] In this embodiment, the external copper busbar injection molding part is a second type copper busbar injection molding part 8, and a magnetic ring 7 is provided on the three-phase conversion terminal 3 of the inverter end, such as Figure 4 As shown in (4a).

[0040] In this embodiment, the internal three-phase copper busbar is a second-type three-phase copper busbar 81, such as... Figure 4 As shown in (4b), a copper busbar riveting nut 82 is provided on the three-phase conversion terminal of the inverter end for riveting with the AC copper busbar of the inverter.

[0041] The rest is the same as in Example 1.

[0042] Example 3

[0043] This embodiment provides a variant structure of the L-shaped high-low voltage connection assembly described in Embodiment 1, such as... Figure 5 As shown, the L-shaped high and low voltage connection components are arranged on the right, and the power modules of the inverter are placed horizontally.

[0044] In this embodiment, the external copper busbar injection molding part is a third type copper busbar injection molding part 9, such as... Figure 5 As shown in (5a), the internal three-phase copper bus includes a three-phase transfer terminal 10 for the third type motor end and a three-phase transfer terminal 11 for the third type inverter end. A magnetic ring 7 is provided on the three-phase transfer terminal 10 for the third type inverter end.

[0045] The top view of the L-shaped high and low voltage connection assembly in this embodiment is as follows: Figure 5 As shown in (5b), the three-phase adapter terminal 10 of the third type motor end protrudes from the third type copper busbar injection molded part 9.

[0046] The rest is the same as in Example 1.

[0047] Example 4

[0048] This embodiment provides a variant structure of the L-shaped high-low voltage connection assembly described in Embodiment 1, such as... Figure 6 As shown, the L-shaped high and low voltage connection components are arranged to the right, and the power modules of the inverter are placed vertically.

[0049] The overall structure of the L-shaped high-low voltage connection assembly in this embodiment is different from that in embodiment 3, except that the connection direction of the three-phase adapter terminal 10 at the inverter end has been changed by 90°.

[0050] In this embodiment, the external copper busbar injection molding part is a fourth type copper busbar injection molding part 11, such as... Figure 6 As shown in (6a), the internal three-phase copper bus includes a fourth type motor end three-phase adapter terminal 14 and a fourth type inverter end three-phase adapter terminal 15.

[0051] In this embodiment, the internal three-phase copper busbar is a fourth type three-phase copper busbar 15, such as... Figure 6 As shown in (6c), in the three-phase transition terminal 15 of the fourth type inverter, the transition copper column 12 is used instead of the copper busbar riveting nut. The transition copper column 12 is provided with a threaded hole, which can be directly riveted to the inverter AC copper busbar.

[0052] The top view of the L-shaped high and low voltage connection assembly in this embodiment is as follows: Figure 6 As shown in (6b), the transition copper pillar 12 is encased in the third type of copper busbar injection molded part 9.

[0053] The rest is the same as in Example 1.

[0054] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An L-shaped high-low pressure connection assembly, characterized by, The three-phase copper bar includes an inverter end three-phase adapter terminal (3) and a motor end three-phase adapter terminal (6), the external copper bar injection molding part is L-shaped, a platform is arranged at the turning position, a low-voltage connector (2) is arranged on the platform, a magnetic ring (7) is arranged on the inverter end three-phase adapter terminal (3), and a sealing ring (5) is sleeved on the external copper bar injection molding part near the motor end three-phase adapter terminal (6).

2. The L-type high-low pressure connection assembly of claim 1, wherein, The low-voltage connector (2) includes a first connecting terminal (21), a second connecting terminal (22) and a protection structure (23), the first connecting terminal (21) is connected with the inverter end three-phase adapter terminal (3), and the second connecting terminal (22) is connected with the motor end three-phase adapter terminal (6).

3. The L-type high-low pressure connection assembly of claim 1, wherein, The sealing ring (5) is a cylindrical sealing element.

4. The L-type high-low pressure connection assembly of claim 1, wherein, An installation hole (4) is further arranged on the platform, and the external copper bar injection molding part is fixed on the motor shell through the installation hole (4).

5. The L-type high-low pressure connection assembly of claim 1, wherein, The low-voltage connector (2) and the magnetic ring (7) are filled in the external copper bar injection molding part through epoxy resin.

6. The L-type high-low pressure connection assembly of claim 1, wherein, A sealing groove is formed in the external copper bar injection molding part for embedding the sealing ring (5).

7. The L-type high-low pressure connection assembly of claim 1, wherein, The three-phase copper bar includes three parallel copper bars, and the copper bars are separated by the external copper bar injection molding part.

8. The L-type high-low pressure connection assembly of claim 1, wherein, A copper bar riveting nut (82) is arranged on the motor end three-phase adapter terminal (6).

9. The L-type high-low pressure connection assembly of claim 1, wherein, A copper bar riveting nut (82) or an adapter copper column (12) is arranged on the inverter end three-phase adapter terminal (3), and a threaded hole is arranged on the adapter copper column (12).

10. The L-type high-low pressure connection assembly of claim 9, wherein, The inverter end three-phase adapter terminal (3) is riveted with an inverter alternating current copper bar through the adapter copper column (12).

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