A connecting copper bar for new energy vehicles and a vehicle power system

Abstract

The utility model discloses a kind of connecting copper bar and vehicle electric power system for new energy vehicle, including copper bar body, copper bar body includes bridging part and wiring part, bridging part is coated with shielding layer outside, at least one shielding ground assembly is connected outside the shielding layer, shielding ground assembly includes clamping piece, tightening piece, locking piece, conducting sheet and ground terminal, clamping piece includes base portion and clamping portion, clamping inner groove is equipped between clamping portion, conducting sheet is connected with ground terminal by braided wire, tightening piece includes tightening portion and screwing portion, tightening portion is abutted in the inside of base portion, screwing portion passes through base portion and is connected with locking piece, conducting sheet is connected in clamping inner groove, conducting sheet is in conformance with shielding layer. The utility model increases the conductive cross-sectional area, realizes the real low impedance ground, and ensures that under the long-term vibration of vehicle, cold and hot impact and other harsh working conditions, ground connection still remains stable, ensures the long-term stability of electromagnetic shielding effect.

Description

Technical Field

[0001] This utility model relates to the field of power copper busbar technology, specifically to a connecting copper busbar and vehicle power system for new energy vehicles. Background Technology

[0002] With the rapid development of new energy vehicles in recent years, their penetration rate in the automotive market has continued to increase. While the new energy vehicle industry continues to expand its market size, it is moving towards high-quality development in the direction of deep popularization of intelligence, diversified integration of technologies, and comprehensive upgrading of safety systems.

[0003] The vehicle's electrical system is the core artery of a new energy vehicle. During use, the batteries in a new energy vehicle output current or are connected in series to form battery modules. The connections between these modules require conductors to transmit current. The use of new energy vehicles involves multiple design dimensions, including charging safety, electromagnetic safety, functional safety, high-voltage safety, battery safety, and fire safety. Electromagnetic safety, or electromagnetic compatibility, is a key factor in the design of high-voltage systems for new energy vehicles, affecting their overall safety during use.

[0004] In new energy vehicles, copper busbars primarily transmit high-current, high-voltage direct current. However, interference mainly stems from high-order harmonics generated by power devices in the electronic control system, sudden current changes during motor operation, and the antenna effect of the copper busbar itself. Simultaneously, there is the more complex electromagnetic environment from the road. Currently, existing copper busbars used in new energy vehicles typically rely on shielding shells for electromagnetic shielding. However, these shielding shells often fail to achieve truly low-impedance grounding, resulting in poor electromagnetic shielding performance for the connecting copper busbars.

[0005] In view of this, there is an urgent need to design a connecting copper busbar for new energy vehicles in order to solve the defects in electromagnetic safety of existing connecting copper busbars for new energy vehicles. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a connecting copper busbar and vehicle power system for new energy vehicles.

[0007] In a first aspect, a connecting copper busbar for new energy vehicles is provided, comprising a copper busbar body, the copper busbar body including a bridging portion and wiring portions located at both ends of the bridging portion, the bridging portion being covered by a shielding layer, and at least one shielding grounding assembly being connected to the outside of the shielding layer, the shielding grounding assembly including a clamping member, a tightening member, a locking member, a conductive sheet, and a grounding terminal, the clamping member including a base portion and clamping portions located on both sides of the base portion, a clamping inner groove being provided between the clamping portions, the conductive sheet being connected to the grounding terminal via a braided wire, the tightening member including a tightening portion and a screwing portion, the tightening portion abutting against the inner side of the base portion, the screwing portion passing through the base portion and connecting to the locking member, the conductive sheet being connected in the clamping inner groove, and the conductive sheet being in contact with the shielding layer.

[0008] In one possible implementation, the clamping member has a deformation gap, which is distributed between the base portion and the clamping portion.

[0009] In one possible implementation, the clamping portion has a barb portion at one end away from the base portion, and the barb portion extends toward the clamping groove side.

[0010] In one possible implementation, limiting portions are provided on the inner sides of both clamping portions, and the limiting portions are located on both sides of the conductive sheet.

[0011] In one possible implementation, one of the clamping portions has a wire-passing hole, the braided wire is connected in the wire-passing hole, one end of the braided wire is soldered to the conductive sheet, and the other end of the braided wire is crimped to the grounding terminal.

[0012] In one possible implementation, the inner side of the base portion is provided with a positioning groove, and the two sides of the positioning groove are provided with functional edges. The tightening portion includes a positioning block, and the two sides of the positioning block extend toward one side of the clamping portion to form functional ends. The positioning block is connected in the positioning groove, and the functional ends abut against the functional edges.

[0013] In one possible implementation, a gasket is connected to the screw joint, the gasket being located between the locking member and the base portion.

[0014] In one possible implementation, the screw-in portion and the locking member are connected by a threaded engagement.

[0015] In one possible implementation, the clamping element is integrally injection molded.

[0016] In a second aspect of the utility model, a vehicle power system is provided, including the aforementioned connecting copper busbar for new energy vehicles.

[0017] The method of using the connecting copper busbar of this utility model for new energy vehicles is as follows: After the wiring part of the copper busbar body is electrically connected to the vehicle's electrical system, the position and quantity of the shielded grounding component are set according to the length of the bridging part and the distance between the grounding point of the vehicle body and the connection point of the bridging part; after the shielded grounding component is connected to the designated position, the locking part is screwed on with a tool to apply force to the tightening part of the tightening part towards the base part, thereby tightening the clamping part, and the conductive sheet is tightened to form a surface-to-surface conductive contact with the shielding layer. Then the grounding terminal is connected to the grounding point of the vehicle body.

[0018] Compared with the prior art, the technical solution provided by this utility model has the following advantages: This technical solution for connecting copper busbars in new energy vehicles uses a shielded grounding assembly to create a large-area, tight surface-to-surface contact between the conductive sheet and the shielding layer. This significantly increases the conductive cross-sectional area and substantially reduces the contact resistance and inductance at the connection point, thus achieving true low-impedance grounding. The continuous clamping force generated by tightening the locking components ensures that the grounding connection remains stable even under harsh conditions such as long-term vehicle vibration and thermal shock, preventing grounding failure due to loosening and ensuring the long-term stability of the electromagnetic shielding effect. Reliable low-impedance grounding improves the signal transmission quality and stability of the entire vehicle while significantly reducing electromagnetic radiation interference from the copper busbar to the outside world.

[0019] The shielded grounding assembly of this technical solution can be flexibly set according to the length of the copper busbar bridging part and the distance between the grounding point on the vehicle body and the connection point of the bridging part. It can be installed near the actual location of the grounding point on the vehicle body to achieve multi-point grounding, which is particularly important for suppressing high-frequency interference. It avoids the introduction of additional inductance by long-distance grounding wires. The structure does not require welding or special surface treatment of the shielding layer. During installation, it only needs to be clamped, which greatly simplifies the assembly process and improves production efficiency. Attached Figure Description

[0020] Figure 1 This is a perspective view of the connecting copper busbar used in new energy vehicles according to an embodiment of the present invention.

[0021] Figure 2 This is a perspective view of the shielding and grounding assembly according to an embodiment of the present utility model.

[0022] Figure 3 This is a cross-sectional view of the connecting copper busbar used in a new energy vehicle according to an embodiment of the present invention.

[0023] Figure 4 This is an exploded view of some components of the shielding and grounding assembly according to an embodiment of this utility model.

[0024] Figure 5 This is a perspective view of the clamping component in an embodiment of the present utility model.

[0025] Figure 6 This is a perspective view of the tightening component in an embodiment of the present utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. The accompanying drawings are for illustrative purposes only, representing schematic diagrams only, not actual object drawings, and should not be construed as limiting this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0027] Example 1

[0028] Combined with appendix Figure 1 To be continued Figure 6 This utility model provides a connecting copper busbar for new energy vehicles, comprising a copper busbar body 1. The copper busbar body 1 includes a bridging portion 11 and wiring portions 12 located at both ends of the bridging portion 11. The bridging portion 11 is covered with a shielding layer 2. At least one shielding grounding component is connected to the outside of the shielding layer 2. The shielding grounding component includes a clamping member 3, a tightening member 4, a locking member 5, a conductive sheet 6, and a grounding terminal 7. The clamping member 3 includes a base portion 31 and clamping portions 32 located on both sides of the base portion 31. A clamping inner groove 33 is provided between the clamping portions 32. The conductive sheet 6 is connected to the grounding terminal 7 via a braided wire 8. The tightening member 4 includes a tightening portion 41 and a screwing portion 42. The tightening portion 41 abuts against the inner side of the base portion 31. The screwing portion 42 passes through the base portion 31 and is connected to the locking member 5. The conductive sheet 6 is connected in the clamping inner groove 33 and is in contact with the shielding layer 2.

[0029] In this embodiment, after the base portion 31 of the clamping member 3 receives the force of the tightening portion 41, the clamping portions 32 will move closer to each other, so that the conductive sheet 6 connected in the clamping inner groove 33 is tightly attached to the shielding layer 2, thereby realizing the electrical connection between the shielding grounding component and the shielding layer 2 of the copper busbar body 1.

[0030] In this embodiment, the copper busbar is used as follows: after the wiring part 12 of the copper busbar body 1 is electrically connected to the vehicle's electrical system, the position and number of the shielded grounding components are set according to the length of the bridging part 11 and the distance between the vehicle grounding point and the connection point of the bridging part 11; after the shielded grounding components are connected to the designated position, the locking part 5 is screwed on with a tool to apply force to the tightening part 4 towards the base part 31, thereby tightening the clamping part 32, and the conductive sheet 6 is tightened to form a surface-to-surface conductive contact with the shielding layer 2. Then, the grounding terminal is connected to the vehicle grounding point.

[0031] In this embodiment, as shown in the appendix Figure 3 and attached Figure 5 As shown, the clamping member 3 has a deformation gap 34, which is distributed on the base part 31 and the clamping parts 32 on both sides. The deformation gap 34 provides support for the clamping member 3 to perform clamping and tightening actions under the cooperative action of the tightening member 4 and the locking member 5.

[0032] In this embodiment, as shown in the appendix Figure 3 and attached Figure 5 As shown, the clamping part 32 is provided with a barb part 35 at one end away from the base part 31. The barb part 35 extends toward the clamping inner groove 33. When the shielding grounding component is clamped and grounded, the barb part 35 locks the shielding layer 2 to prevent the shielding grounding component from detaching from the shielding layer 2.

[0033] In this embodiment, as shown in the appendix Figure 5 As shown, each of the two clamping parts 32 has a limiting part 36 on its inner side. The limiting part 36 is located on both sides of the conductive sheet 6. The limiting part 36 prevents the conductive sheet 6 from detaching from the clamping inner groove 33. The conductive sheet 6 is an elastic conductive material, specifically a beryllium copper alloy.

[0034] In this embodiment, as shown in the appendix Figure 2 and attached Figure 5 As shown, one of the clamping parts 32 has a wire hole 321. The braided wire 8 is connected in the wire hole 321. One end of the braided wire 8 is soldered to the conductive sheet 6, and the other end of the braided wire 8 is crimped to the grounding terminal 7. The braided wire 8 is led out from the wire hole 321 for easy wiring.

[0035] In this embodiment, as shown in the appendix Figure 5 and attached Figure 6As shown, the inner side of the base portion 31 is provided with a positioning groove 311, and the two sides of the positioning groove 311 are provided with functional edges 312. The tightening portion 41 includes a positioning block 411, and the two sides of the positioning block 411 extend toward the clamping portion 32 to form functional ends 412. The positioning block 411 is connected in the positioning groove 311, and the functional ends 412 abut against the functional edges 312. The clamping member 3 and the tightening member 4 are coupled as described above, so that during the clamping process, the clamping portions 32 on both sides exert uniform force on the conductive sheet 6, and have a better clamping effect.

[0036] In this embodiment, as shown in the appendix Figure 2 To be continued Figure 4 As shown, a washer 9 is connected to the screw-in part 42, and the washer 9 is located between the locking member 5 and the base part 31.

[0037] In this embodiment, as shown in the appendix Figure 4 As shown, the screw-in part and the locking part are connected by a threaded connection.

[0038] In this embodiment, the clamping component is integrally injection molded.

[0039] In this embodiment, the connecting copper busbar for new energy vehicles uses a shielded grounding assembly to create a large-area, tight surface-to-surface contact between the conductive sheet 6 and the shielding layer 2. This significantly increases the conductive cross-sectional area and substantially reduces the contact resistance and inductance at the connection point, thereby achieving true low-impedance grounding. The continuous clamping force generated by tightening the locking component 5 ensures that the grounding connection remains stable even under harsh conditions such as long-term vehicle vibration and thermal shock, preventing grounding failure due to loosening and ensuring the long-term stability of the electromagnetic shielding effect. Reliable low-impedance grounding improves the signal transmission quality and stability of the entire vehicle while significantly reducing electromagnetic radiation interference from the copper busbar to the outside world.

[0040] In this embodiment, the shielded grounding assembly can be flexibly configured according to the length of the copper busbar bridging part 11 and the distance between the grounding point on the vehicle body and the connection point of the bridging part 11. It can be installed near the actual location of the grounding point on the vehicle body to achieve multi-point grounding, which is particularly important for suppressing high-frequency interference. It avoids the introduction of additional inductance by long-distance grounding wires. The structure does not require welding or special surface treatment of the shielding layer 2. It can be installed simply by clamping, which greatly simplifies the assembly process and improves production efficiency.

[0041] Example 2

[0042] Combined with appendix Figure 1 To be continued Figure 6 The present invention relates to a vehicle power system, including the connecting copper busbar for new energy vehicles as described in Embodiment 1.

[0043] In this embodiment, the vehicle electrical system includes a power supply module, a power consumption module, and a vehicle body grounding point. After the connecting copper busbar is connected between the power supply module and / or the power consumption module, the shielded grounding component is mounted and connected to the shielding layer 2 of the copper busbar and clamped to ensure that the conductive sheet 6 is tightly attached to the shielding layer 2 of the copper busbar. Finally, the grounding terminal 7 is electrically connected to the nearby vehicle body grounding point.

[0044] In this embodiment, the vehicle power system employs an innovative and reliably clamped shielded grounding assembly, achieving a large-area, low-impedance, and highly stable electrical connection between the shielding layer 2 and the vehicle body ground. This fundamentally solves the problem of poor grounding in traditional designs. This not only significantly improves the electromagnetic shielding effectiveness of the copper busbar and ensures the electromagnetic safety of the entire vehicle, but also brings a series of advantages such as convenient installation, strong adaptability, high flexibility, and high reliability through its modular and flexible design. It provides important basic component support for the safety and reliability of high-voltage systems in new energy vehicles.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model, or direct / indirect applications in other related technical fields, should be included within the scope of protection of the claims of this utility model.

Claims

1. A connecting copper busbar for new energy vehicles, comprising a copper busbar body, the copper busbar body including a bridging portion and wiring portions located at both ends of the bridging portion, the bridging portion being externally covered with a shielding layer, characterized in that, The shielding layer is externally connected to at least one shielding grounding assembly. The shielding grounding assembly includes a clamping member, a tightening member, a locking member, a conductive sheet, and a grounding terminal. The clamping member includes a base portion and clamping portions located on both sides of the base portion. A clamping inner groove is provided between the clamping portions. The conductive sheet is connected to the grounding terminal via a braided wire. The tightening member includes a tightening portion and a screwing portion. The tightening portion abuts against the inner side of the base portion. The screwing portion passes through the base portion and connects to the locking member. The conductive sheet is connected in the clamping inner groove and is in contact with the shielding layer.

2. The connecting copper busbar for new energy vehicles according to claim 1, characterized in that, The clamping member has deformation gaps, which are distributed between the base portion and the clamping portion.

3. A connecting copper busbar for new energy vehicles according to claim 1, characterized in that, The clamping part is provided with a barb at one end away from the base part, and the barb extends toward the clamping groove.

4. A connecting copper busbar for new energy vehicles according to claim 1, characterized in that, Both clamping parts are provided with limiting parts on their inner sides, and the limiting parts are located on both sides of the conductive sheet.

5. A connecting copper busbar for new energy vehicles according to claim 1, characterized in that, One of the clamping parts has a wire-passing hole, the braided wire is connected in the wire-passing hole, one end of the braided wire is soldered to the conductive sheet, and the other end of the braided wire is crimped to the grounding terminal.

6. A connecting copper busbar for new energy vehicles according to any one of claims 1 to 5, characterized in that, The inner side of the base portion is provided with a positioning groove, and the two sides of the positioning groove are provided with functional edges. The tightening portion includes a positioning block, and the two sides of the positioning block extend toward one side of the clamping portion to form functional ends. The positioning block is connected in the positioning groove, and the functional ends abut against the functional edges.

7. A connecting copper busbar for new energy vehicles according to any one of claims 1 to 5, characterized in that, A gasket is connected to the screw joint, and the gasket is located between the locking member and the base.

8. A connecting copper busbar for new energy vehicles according to any one of claims 1 to 5, characterized in that, The screw-in part and the locking part are connected by a threaded engagement.

9. A connecting copper busbar for new energy vehicles according to any one of claims 1 to 5, characterized in that, The clamping component is integrally injection molded.

10. A vehicle electrical system, characterized in that, Includes the connecting copper busbar for new energy vehicles as described in any one of claims 1 to 9.

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