Electromagnetic shielding grounding structure, high-voltage large-current system and new energy automobile

Abstract

The utility model discloses an electromagnetic shielding grounding structure, a high voltage heavy current system and a new energy automobile, comprising a grounding wire and a shielding cable which are connected with a high voltage connector, the grounding wire and the shielding cable respectively comprise a core wire, an inner insulation sheath, a shielding layer and a cable sheath from inside to outside, shielding layers of the grounding wire and the shielding cable are respectively crimped through respective inner shielding rings and outer shielding rings, the outer shielding rings are connected with a shielding shell in the high-voltage connector, and one end, deviating from the high-voltage connector, of the grounding wire is connected with the grounding terminal. The grounding terminal comprises a core wire crimping area used for crimping a core wire and a shielding layer, an auxiliary crimping area used for crimping an inner insulation skin, and a grounding area used for grounding. The high-voltage large-current system and the new energy automobile comprise the electromagnetic shielding grounding structure. The new energy automobile comprises the high-voltage large-current system. According to the technical scheme provided by the utility model, the structure is simple, the manufacturing process is simple, the labor cost can be effectively reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high -voltage wire harness connection technical field especially refers to a kind of electromagnetic shielding ground structure, high-voltage large current system and new energy vehicle. BACKGROUND

[0002] With the intelligent development of new energy vehicles, the functions on the vehicle are also more and more, many vehicles increase the discharge function, to power the external electrical appliances, to meet the special use scene needs of vehicle users. However, the external electrical appliances have no electromagnetic shielding function, and the high-voltage large current system in the new energy vehicle will generate electromagnetic interference to the external electrical appliances during the process of supplying power to the external electrical appliances.

[0003] Therefore, in order to reduce the electromagnetic interference of the high-voltage large current system in the new energy vehicle to the external electrical appliances, as shown in Figure 1 , the prior patent solution of the applicant can be used, that is, the utility model patent with the authorization announcement date of November 12, 2021 and the authorization announcement number of CN 214705485 U discloses a shielding high-voltage wire shielding layer grounding structure, which comprises a shielding high-voltage wire, a connecting terminal, a connecting wire and a grounding terminal for connecting with the vehicle body. The shielding layer of the shielding high-voltage wire is connected with the connecting terminal, the connecting terminal is connected with the connecting wire, and the connecting wire is connected with the grounding terminal. That is, the high-voltage large current system in the new energy vehicle adopts the above-mentioned shielding high-voltage wire shielding layer grounding structure, which can shield the electromagnetic generated by the high-voltage wire in the high-voltage large current system.

[0004] However, the above-mentioned shielding high-voltage wire shielding layer grounding structure uses the technical means of first dispersing the shielding layer of the high-voltage shielding wire, that is, the tinned copper wire mesh sleeve, then twisting it into a strand, and then connecting the twisted shielding layer with the connecting terminal, the connecting wire and the grounding terminal with the vehicle body in sequence. Therefore, if the above-mentioned shielding high-voltage wire shielding layer grounding structure is used to avoid the electromagnetic interference of the high-voltage large current system in the new energy vehicle to the external electrical appliances, the following problems still exist and need to be improved: first, the types of required parts are more, both the shielding layer in a strand and the connecting terminal, the connecting wire and the grounding terminal are needed, among which the connecting terminal is a special terminal structure that cannot be adapted to the existing connector, in addition, the connecting wire is also another wire with different specifications from the shielding high-voltage wire; second, the installation steps are more complicated, both the shielding layer needs to be first dispersed and then twisted into a strand, and the connecting terminal needs to be used to crimp the twisted shielding layer and the connecting wire respectively, and the grounding terminal needs to be used to crimp the connecting wire; third, and the most important point is that the above-mentioned shielding high-voltage wire shielding layer grounding structure needs to make great changes to the existing connector of the new energy vehicle high-voltage wire harness, and the specific position of the shielding layer dispersion and twisting into a strand, and the electromagnetic shielding of the position are not mentioned.

[0005] It should be particularly noted that the above technical information is only intended to deepen the understanding of the overall background of the present application, and should not be regarded as acknowledging or implying in any form that the above technical information constitutes the prior art known to those skilled in the art. Practical new content

[0006] In view of the deficiencies in the above background art, the utility model provides an electromagnetic shielding grounding structure, a high-voltage and large-current system and a new energy vehicle, which solve the technical problems that the existing high-voltage wire shielding layer grounding structure needs to make great changes to the connector and is complicated to operate.

[0007] The technical scheme of the present application is:

[0008] An electromagnetic shielding grounding structure, comprising a grounding wire and a shielding cable connected with a high-voltage connector, the grounding wire and the shielding cable each comprising a core wire, an inner insulation skin, a shielding layer and a cable outer skin from inside to outside, the shielding layers of the grounding wire and the shielding cable being respectively crimped through respective inner shielding rings and outer shielding rings, the outer shielding ring being connected with a shielding shell in the high-voltage connector, one end of the grounding wire away from the high-voltage connector being connected with a grounding terminal, the grounding terminal comprising a core wire crimping area for crimping the core wire and the shielding layer, a secondary crimping area for crimping the inner insulation skin and a grounding area for grounding.

[0009] The technical scheme not only does not need to make changes to the existing high-voltage connector, but also adopts general parts except the grounding terminal, the grounding wire for grounding and each shielding cable structure electrically connected with the high-voltage connector are the same, at the same time, the shielding layer of the grounding wire does not need to be changed, each connection can be directly crimped through a crimping structure; in addition, the shielding layer of the grounding terminal of the grounding wire is crimped by the core wire crimping area at the same time as the core wire, not only the connection strength is reliable, but also the shielding layer is clamped between the core wire and the core wire crimping area, the shielding layer has more superior conductive grounding performance, and the secondary crimping area can not only position the inner insulation skin, but also further crimp the shielding layer.

[0010] On the basis of the above technical scheme, as a preferred technical scheme of the electromagnetic shielding grounding structure, the end portion of the shielding layer protrudes from the inner insulation skin and is crimped between the core wire and the core wire crimping area, and the inner side of the end portion of the shielding layer is crimped between the inner insulation skin and the secondary crimping area.

[0011] On the basis of the above technical scheme, as a preferred technical scheme of the electromagnetic shielding grounding structure, the grounding terminal is an integrated stamping structure.

[0012] On the basis of the above technical scheme, as the electromagnetic shielding grounding structure preferred technical scheme, the grounding terminal is Z-shaped bending, the core wire crimping area and the secondary crimping area are located at one end of the grounding terminal, and the grounding area is located at the other end of the grounding terminal.

[0013] On the basis of the above technical scheme, as the electromagnetic shielding grounding structure preferred technical scheme, the core wire crimping area, the secondary crimping area are coaxially and spacedly arranged.

[0014] On the basis of the above technical scheme, as the electromagnetic shielding grounding structure preferred technical scheme, the bending part of the grounding terminal is provided with a hole for weakening stress concentration, and the grounding area is provided with a connecting hole for grounding.

[0015] On the basis of the above technical scheme, as the electromagnetic shielding grounding structure preferred technical scheme, the inner shielding ring is sleeved outside the cable sheath, the shielding layer is sleeved outside the inner shielding ring after being folded and is fixed by the outer shielding ring.

[0016] A high-voltage and large-current system comprises a first high-voltage connector for connecting a power supply unit, a second high-voltage connector for connecting an electrical appliance, and the electromagnetic shielding grounding structure of any one of the above technical schemes, wherein the high-voltage connector is the first high-voltage connector or the second high-voltage connector, and the first high-voltage connector is connected to the second high-voltage connector through the shielding cable.

[0017] A new energy vehicle comprises the high-voltage and large-current system, and the grounding terminal is grounded through the vehicle body.

[0018] On the basis of the above technical scheme, as the new energy vehicle preferred technical scheme, the grounding terminal is connected to the vehicle body through a screw or a bolt matched with the connecting hole.

[0019] Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

[0020] The shielding layer of the shielding cable and the shielding layer of the grounding wire are mutually conducted through the high-voltage connector, the connection mode of the shielding cable and the grounding wire with the high-voltage connector is the same, the installation structure and the installation position of the core wire are conventional technologies, the connection of the shielding layer is crimped through the inner shielding ring and the outer shielding ring and connected to the shielding shell of the high-voltage connector, the shielding layer of the grounding terminal of the grounding wire is crimped by the core wire crimping area at the same time, the connection strength is reliable, the shielding layer is clamped between the core wire and the core wire crimping area, the conductive grounding performance of the shielding layer is more superior, and the secondary crimping area can position the inner insulating sheath and further crimp the shielding layer. Compared with the prior art, the grounding terminal directly crimps the core wire and the shielding layer, and the production cost and the processing difficulty are greatly reduced.

[0021] The high-voltage and large-current system provided by the utility model adopts the electromagnetic shielding grounding structure, can conveniently and reliably shield the high-voltage and large-current system, and avoids affecting the connected electrical appliances.

[0022] The new energy automobile provided by the utility model adopts the high-voltage and large-current system, effectively avoids the electromagnetic interference of the high-voltage and large-current system on the connected electrical appliances, improves the reliability of the grounding wire and the grounding terminal connection, the shielding grounding structure is simple, the manufacturing process is simple, the artificial cost can be effectively reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the drawings for the ordinary skilled in the art without creating labor.

[0024] Figure 1 It is a structural diagram of the electromagnetic shielding grounding structure;

[0025] Figure 2 It is an enlarged view of the grounding terminal and the grounding wire;

[0026] Figure 3 It is the grounding wire, the shielding inner ring and the shielding outer ring in the electromagnetic shielding grounding structure;

[0027] Figure 4 It is an explosion view of the shielding cable and the high-voltage connector connection place;

[0028] Figure 5 It is the high-voltage and large-current system in the new energy automobile provided by the application.

[0029] EXPLANATION OF DRAWINGS:

[0030] High-voltage connector 1, first high-voltage connector 1-1, second high-voltage connector 1-2, inner shielding ring 101, outer shielding ring 102, shielding shell 103, outer shell 104;

[0031] Grounding wire 2, core wire 201, inner insulation skin 202, shielding layer 203, cable outer skin 204;

[0032] Grounding terminal 3, core wire crimping area 301, auxiliary crimping area 302, grounding area 303, connecting hole 304, reinforcing rib 305, bending plate 306, hole 307;

[0033] Shielding cable 4, cable fixing buckle 5. DETAILED DESCRIPTION

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the core concept of the present utility model and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] An electromagnetic shielding grounding structure, such as Figures 1 to 3 As shown, the system includes a grounding wire 2 connected to a high-voltage connector 1 and a shielded cable 4. The shielding layer 203 of the grounding wire 2 and the shielding layer 203 of the shielded cable 4 are connected through the high-voltage connector 1. The grounding wire 2 is then connected to a grounding terminal 3, thereby grounding the shielding layer 203 of the shielded cable 4. The specific structure is as follows:

[0036] Both the grounding wire 2 and the shielded cable 4 include, from the inside out, a core wire 201, an inner insulation layer 202, a shielding layer 203, and an outer cable sheath 204. That is, the grounding wire 2 and the shielded cable 4 have the same structure, but they have different assembly relationships. The grounding wire 2 is used to assemble between the high-voltage connector 1 and the grounding terminal 3, while the shielded cable 4 is a conductive cable assembled between adjacent high-voltage connectors 1. It should be noted that both the grounding wire 2 and the shielded cable 4 have the same connection structure at the end connected to the high-voltage connector 1. The specific structure is as follows:

[0037] The shielding layers 203 of the grounding wire 2 and the shielded cable 4 are respectively crimped together by their respective inner shielding rings 101 and outer shielding rings 102. That is, after the inner shielding rings 101 and outer shielding rings 102 are crimped together, they clamp the shielding layer 203. At the same time, the inner shielding ring 101 is also crimped onto the outside of the grounding wire 2 and the shielded cable 4. The corresponding outer shielding ring 102 is connected to the shielding shell 103 inside the outer housing 104 of the high-voltage connector 1, thereby making the shielding layer 203 of the grounding wire 2 and the shielding layer 203 of the shielded cable 4 mutually conductive. At the same time, the shielding shell 103 forms a shield at the connection between the high-voltage connector 1 and the grounding wire 2 and the shielded cable 4, preventing magnetic leakage.

[0038] The end of the grounding wire 2 away from the high-voltage connector 1 is connected to the grounding terminal 3. The grounding terminal 3 includes a core wire crimping area 301 for crimping the core wire 201 and the shielding layer 203, a secondary crimping area 302 for crimping the inner insulation sheath 202, and a grounding area 303 for grounding.

[0039] The embodiment does not need to change the existing high-voltage connector 1, and all the parts used are general parts except the grounding terminal 3. The grounding wire 2 for grounding and the shielding cable 4 electrically connected with the high-voltage connector 3 are of the same structure. Meanwhile, the shielding layer 203 of the grounding wire 2 does not need to be changed, and all the connections can be directly crimped through the crimping structure, so that the processing mode is unified and the operation is convenient. In addition, the shielding layer 203 of the grounding end of the grounding wire 2 is crimped by the core wire crimping area 301 at the same time as the core wire 201, which not only has reliable connection strength, but also clamps the shielding layer 203 between the core wire 201 and the core wire crimping area 301, so that the shielding layer 203 has superior conductive grounding performance. The secondary crimping area 302 can not only position the inner insulation skin 202, but also further crimp the shielding layer 203.

[0040] On the basis of the above embodiment, as a preferred embodiment of the electromagnetic shielding grounding structure, the end of the shielding layer 203 protrudes from the inner insulation skin 202 and is crimped between the core wire 201 and the core wire crimping area 301, and the inner side of the end of the shielding layer 203 is crimped between the inner insulation skin 202 and the secondary crimping area 302. That is, the double crimping is formed by the core wire crimping area 301 and the secondary crimping area 302, which can not only simultaneously crimp the shielding layer 203 of the grounding wire 2, but also has different effects of the two crimping. The crimping of the end can improve the reliability of the contact while enhancing the connection strength, and the crimping of the inner side can further enhance the connection strength and the contact reliability.

[0041] On the basis of the above embodiment, as a preferred embodiment of the electromagnetic shielding grounding structure, the grounding terminal 3 is an integral stamping structure, which has simple structure, convenient processing and superior conduction performance.

[0042] On the basis of the above embodiment, as a preferred embodiment of the electromagnetic shielding grounding structure, the grounding terminal 3 is in Z-shaped bending shape, the core wire crimping area 301 and the secondary crimping area 302 are located at one end of the grounding terminal 3, and the grounding area 303 is located at the other end of the grounding terminal 3. The above structure design can facilitate the installation and removal of the grounding area 303, and can avoid the interference between the installation structure of the grounding area 303 and the core wire crimping area 301, the secondary crimping area 302 and the grounding wire 2.

[0043] On the basis of the above embodiment, as a preferred embodiment of the electromagnetic shielding grounding structure, the core wire crimping area 301 and the secondary crimping area 302 are coaxially and spaced apart, which facilitates the placement of the grounding wire 2 into the core wire crimping area 301 and the secondary crimping area 302, and facilitates crimping.

[0044] On the basis of the above-mentioned embodiments, as a preferred embodiment of the electromagnetic shielding grounding structure, a hole 307 for weakening stress concentration is arranged at the bending position of the grounding terminal 3, and a connecting hole 304 for grounding is arranged at the grounding region 303. The hole 307 is used to disperse the stress during stamping, and the connecting hole 304 can be fitted with a screw or bolt for grounding fixation.

[0045] Preferably, the grounding terminal 3 is provided with a reinforcing rib 305 formed by stamping on both sides, and the grounding region 303 is provided with a bending plate 306 at the end away from the core wire crimping region 301. The reinforcing rib 305 can not only be used to strengthen the structure, but also can be used to clamp the structure to be connected. Similarly, the bending plate 306 can not only strengthen the structural strength, but also can be hung or inserted with the structure to be connected. Preferably, the bending plate 306 is away from the reinforcing rib 305, i.e., they are respectively located on the two end faces of the grounding region 303.

[0046] On the basis of the above-mentioned embodiments, as a preferred embodiment of the electromagnetic shielding grounding structure, as shown in Figure 4 The inner shielding ring 101 is sleeved outside the cable outer skin 204, the shielding layer 203 is folded and sleeved outside the inner shielding ring 101 and is fixed by crimping of the outer shielding ring 102. That is, from the inside to the outside at the crimping position of the shielding layer 203, there are the core wire 201, the inner insulation skin 202, the shielding layer 203, the cable outer skin 204, the inner shielding ring 101, the folded shielding layer 203, and the outer shielding ring 102, forming a crimping structure with reliable connection strength and excellent contact performance.

[0047] A high-voltage and large-current system includes a first high-voltage connector 1-1 for connecting a power supply unit, a second high-voltage connector 1-2 for connecting an electrical appliance, and the electromagnetic shielding grounding structure of any one of the above-mentioned embodiments. The high-voltage connector 1 is the first high-voltage connector 1-1 or the second high-voltage connector 1-2, and the first high-voltage connector 1-1 is connected to the second high-voltage connector 1-2 through the shielding cable 4.

[0048] A new energy vehicle includes the high-voltage and large-current system, and the grounding terminal 3 is grounded through the vehicle body.

[0049] On the basis of the above-mentioned embodiments, as a preferred embodiment of the new energy vehicle, as shown in Figure 5 The grounding terminal 3 is connected to the vehicle body through the screw or bolt fitted with the connecting hole 304.

[0050] Preferably, the grounding terminal 3 comprises two end plates and a middle plate, both of the end plates are triangular, one side of the triangle is connected with the middle plate, the core wire crimping area 301 and the auxiliary crimping area 302 are arranged on one of the end plates, the grounding area 303 is arranged at the center of the other end plate, when the connecting hole 304 is connected with the vehicle body by a bolt or a screw, the end plate where the connecting hole 304 is arranged is in contact with the vehicle body, thereby improving the reliability of grounding.

[0051] Preferably, the two end plates and the middle plate of the grounding terminal 3 are arranged vertically. When the grounding terminal 3 is connected with the vehicle body, the female corner structure and / or the male corner structure between the end plate where the connecting hole 304 is arranged and the middle plate is in contact with the plate material on the vehicle body which is perpendicular to each other, thereby increasing the contact area of connection, so as to improve the reliability of connection between the grounding terminal 3 and the vehicle body; the end plate connected with the grounding wire 2 is away from the vehicle body, so that the vehicle body can not press the core wire crimping area 301 and the auxiliary crimping area 302, thereby facilitating the installation of the grounding terminal 3.

[0052] The parts not described in the utility model are the conventional technical means known by the skilled in the art.

[0053] The above shows and describes the basic principle, main features and beneficial effects of the utility model. The above is only the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An electromagnetic shield ground structure, characterized by: The grounding wire (2) and the shielded cable (4) are connected with the high-voltage connector (1), the grounding wire (2) and the shielded cable (4) each comprise a core wire (201), an inner insulation skin (202), a shielding layer (203) and a cable outer skin (204) from inside to outside, the shielding layer (203) of the grounding wire (2) and the shielded cable (4) is respectively crimped by the inner shielding ring (101) and the outer shielding ring (102), the outer shielding ring (102) is connected with the shielding shell (103) in the high-voltage connector (1), one end of the grounding wire (2) away from the high-voltage connector (1) is connected with the grounding terminal (3), the grounding terminal (3) comprises a core wire crimping area (301) for crimping the core wire (201) and the shielding layer (203), a secondary crimping area (302) for crimping the inner insulation skin (202), and a grounding area (303) for grounding.

2. The electromagnetic shield ground structure of claim 1, wherein: The end of the shielding layer (203) protrudes from the inner insulation skin (202) and is crimped between the core wire (201) and the core wire crimping area (301), and the inner side of the end of the shielding layer (203) is crimped between the inner insulation skin (202) and the secondary crimping area (302).

3. The electromagnetic shield ground structure according to claim 1 or 2, characterized by: The grounding terminal (3) is an integrated stamping structure.

4. The electromagnetic shield ground structure of claim 3, wherein: The grounding terminal (3) is Z-shaped and bent, the core wire crimping area (301) and the secondary crimping area (302) are located at one end of the grounding terminal (3), and the grounding area (303) is located at the other end of the grounding terminal (3).

5. The electromagnetic shield ground structure of claim 4, wherein: The core wire crimping area (301) and the secondary crimping area (302) are coaxially and separately arranged.

6. The electromagnetic shield ground structure according to claim 4 or 5, characterized in that: A hole (307) for weakening stress concentration is arranged at the bending part of the grounding terminal (3), and a connecting hole (304) for grounding is arranged in the grounding area (303).

7. The electromagnetic shield ground structure of claim 6, wherein: The inner shielding ring (101) is sleeved outside the cable outer skin (204), and the shielding layer (203) is sleeved outside the inner shielding ring (101) after being folded and is fixed by the outer shielding ring (102).

8. A high-voltage high-current system comprising a first high-voltage connector (1-1) for connecting a power supply unit, a second high-voltage connector (1-2) for connecting a consumer, characterized in that: The electromagnetic shielding grounding structure of any one of claims 1-7 is further included, the high-voltage connector (1) is the first high-voltage connector (1-1) or the second high-voltage connector (1-2), and the first high-voltage connector (1-1) is connected with the second high-voltage connector (1-2) through the shielded cable (4).

9. A new energy vehicle, characterized in that: The high-voltage and high-current system of claim 8 is further included, and the grounding terminal (3) is connected to the vehicle body through a screw or a bolt matched with the connecting hole (304).

10. The new energy vehicle according to claim 9, characterized in that: The grounding terminal (3) is connected to the vehicle body through a screw or a bolt matched with the connecting hole (304).

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