CN216162035U

CN216162035U - Grounding structure of high-voltage cable shielding layer of electric automobile

Info

Publication number: CN216162035U
Application number: CN202122274437.2U
Authority: CN
Inventors: 王震伟
Original assignee: Henan Liwei New Energy Technology Co ltd
Current assignee: Henan Liwei New Energy Technology Co ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-04-01
Anticipated expiration: 2031-09-18

Abstract

The utility model relates to a grounding structure of a high-voltage cable shielding layer of an electric automobile. A grounding structure of a high-voltage cable shielding layer of an electric automobile comprises: the high-voltage cable is sequentially provided with a conductive inner core, an inner insulating layer, a shielding layer and an outer insulating layer from inside to outside; the shielding layers are gathered into a bundle at one radial side of the inner insulating layer to form a shielding wire harness; the ground structure further includes: one end of the grounding outgoing line and the shielding wire harness are fixed in a compression joint mode through a compression joint terminal and are mutually conducted; and the outgoing line heat-shrinkable tube is sleeved at the joint of the grounding outgoing line and the shielding wire harness to protect the joint. The grounding device can conveniently realize the grounding of the high-voltage cable shielding layer of the electric automobile, and has good universality and low cost.

Description

Grounding structure of high-voltage cable shielding layer of electric automobile

Technical Field

The utility model relates to a grounding structure of a high-voltage cable shielding layer of an electric automobile.

Background

The high-voltage cable of the electric automobile is generally provided with a shielding layer, and the structure of the high-voltage cable sequentially comprises a conductive inner core, an inner insulating layer, the shielding layer and an outer insulating layer from inside to outside.

At present, in order to improve the shielding performance, when the high-voltage cable is used, the shielding layer in the high-voltage cable needs to be grounded. The grounding method of the shielding layer of the high-voltage cable of the electric automobile in the industry mainly comprises the following steps: the end of the high-voltage cable is pressed and connected with the shielding press ring, and the effect of grounding the shielding layer of the high-voltage cable is achieved through a connector with a special structure matched with the shielding press ring, for example, a grounding device for the shielding layer of the high-voltage cable for a vehicle disclosed in Chinese patent publication No. CN 204067605U.

The grounding structure of the existing shielding layer has strong integrity, but has poor universality, high cost and complex process. Especially, when an electric automobile without a shielding function in the early stage is modified and the shielding function of a high-voltage cable is increased, the structure cannot be matched with a connector structure of an original automobile without a shielding compression ring, so that a shielding layer cannot be grounded.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a grounding structure of a high-voltage cable shielding layer of an electric automobile, which can conveniently realize grounding of the high-voltage cable shielding layer of the electric automobile, and has good universality and low cost.

The utility model adopts the following technical scheme:

a grounding structure of a shielding layer of a high-voltage cable of an electric automobile comprises the high-voltage cable, wherein the high-voltage cable is sequentially provided with a conductive inner core, an inner insulating layer, the shielding layer and an outer insulating layer from inside to outside; the shielding layers are gathered into a bundle at one radial side of the inner insulating layer to form a shielding wire harness; the grounding structure further comprises a grounding outgoing line, and one end of the grounding outgoing line and the shielding wire harness are fixed in a compression joint mode through a compression joint terminal and are mutually conducted; a lead-out wire heat-shrinkable tube is sleeved at the joint of the grounding lead-out wire and the shielding wire harness to protect the joint; the grounding structure further comprises a cable heat-shrinkable tube which is used for integrally sleeving the grounding outgoing line and the shielding wire harness and internally sleeved with the high-voltage cable.

Has the advantages that: adopt above-mentioned structure, through with the shielding layer at one side collection in the radial of inner insulating layer for a branch, form the shielding pencil, can utilize the crimping terminal to conveniently connect the ground connection lead-out wire, and then realize drawing forth of shielding layer to can realize the protection through lead-out wire pyrocondensation pipe and cable pyrocondensation pipe, compare with prior art, can conveniently realize the ground connection of electric automobile high voltage cable shielding layer, the commonality is good, and is with low costs.

Further: the grounding outgoing line and the shielding wire harness are provided with lap joint sections, and the lap joint sections are fixed by crimping terminals in a crimping mode.

Has the advantages that: adopt above-mentioned structure to be favorable to improving fixed effect.

Further: the crimping terminal is a connecting pressing sheet, the connecting pressing sheet comprises two symmetrically-arranged pressing line sheet bodies, the pressing line sheet bodies are used for winding corresponding crimping grounding leading-out wires or shielding wire harnesses and are fixed in a crimping mode, and adjacent sides of the two pressing line sheet bodies are connected into a whole.

Further: the shield strands are in the form of strands twisted into strands.

Has the advantages that: by adopting the structure, the structural strength of the shielding wire harness is improved, and the tensile property is good.

Further: and the tail end of the grounding outgoing line is provided with a wiring terminal.

Has the advantages that: the grounding outgoing line is convenient to be connected to the grounding point by adopting the structure.

Further: the wiring terminal is an OT terminal.

Further: the grounding outgoing line is fixed on an electric component shell made of metal through a wiring terminal, and grounding of the shielding layer is achieved.

Has the advantages that: the structure is convenient to operate and operate.

Further: at least a portion of the cable heat shrink tube covers an inner insulation layer of the high voltage cable.

Has the advantages that: adopt above-mentioned structure to be favorable to improving the safeguard effect.

Further: the grounding structure further comprises a corrugated pipe, and one end of the cable heat-shrinkable tube is sleeved on the corrugated pipe.

Has the advantages that: adopt above-mentioned structure can protect the mouth of pipe of bellows, and the reliability is better.

Further: and the outgoing line heat-shrinkable tube covers the outgoing line insulating layer of the grounding outgoing line.

Has the advantages that: by adopting the structure, the protection performance of the grounding outgoing line is improved.

Drawings

Fig. 1 is an overall schematic view of a grounding structure of a high-voltage cable shielding layer of an electric vehicle in the utility model;

FIG. 2 is a schematic diagram of a connection structure between a shielding layer and a ground lead of the high voltage cable shown in FIG. 1, in which a cable pressing sheet and a cable heat-shrinkable tube are omitted;

fig. 3 is a schematic structural view of a connection of the ground lead and the shield harness of fig. 2;

FIG. 4 is a cross-sectional view A-A of FIG. 2;

fig. 5 is a front view of the crimp terminal;

fig. 6 is a sectional view taken along line B-B of fig. 5.

The names of the components corresponding to the corresponding reference numerals in the drawings are: 10. a high voltage cable; 11. a conductive inner core; 12. an inner insulating layer; 13. a shielding layer; 14. an outer insulating layer; 15. shielding the wire harness; 16. a high voltage connection terminal; 17. a double-walled heat shrink tube; 20. a ground lead-out wire; 21. leading out a wire core; 22. an outgoing line insulating layer; 23. a wiring terminal; 31. a crimp terminal; 32. a lead-out wire heat-shrinkable tube; 33. a line pressing sheet body; 34. a rib is protruded; 40. an electrical enclosure; 50. a bellows; 60. cable heat shrink tubing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

Embodiment 1 of a grounding structure of a high-voltage cable shielding layer of an electric vehicle according to the present invention:

a grounding structure of a high-voltage cable shielding layer of an electric automobile comprises a high-voltage cable 10 and a grounding outgoing line 20, wherein one end of the grounding outgoing line 20 is in conductive connection with the shielding layer 13 of the high-voltage cable 10, and the other end of the grounding outgoing line is in conductive connection with an electric part shell 40 made of metal, so that grounding of the shielding layer 13 is realized. In the present embodiment, the electrical component housing 40 is a housing of a motor controller.

As shown in fig. 4, the high voltage cable 10 is provided with a conductive inner core 11, an inner insulating layer 12, a shielding layer 13 and an outer insulating layer 14 in sequence from inside to outside, and the structure is the same as that of the prior art, and the description is omitted here. The conductive core 11 of the high voltage cable 10 is crimped to the high voltage connection terminal 16 and protected by a double-walled heat shrink tube 17. Unlike the shield lead-out structure in the prior art, in the present invention, as shown in fig. 2 and 3, the shield layer 13 is twisted into a bundle on one side in the radial direction of the inner insulating layer 12 to form a shield harness 15 in the form of a strand; meanwhile, the grounding structure further comprises a grounding lead 20, the grounding lead 20 comprises a lead wire core 21 and a lead wire insulating layer 22, and the corresponding ends of the grounding lead 20 and the shielding wire harness 15 are fixed in a crimping mode through a crimping terminal 31 and are mutually conducted. The crimping terminal 31 is a connecting pressing piece, the structure of the connecting pressing piece is shown in fig. 5 and 6, the connecting pressing piece shown in the figure is in a state before crimping, the whole connecting pressing piece is in a V-shaped sheet structure with a cross section, the connecting pressing piece comprises two symmetrically arranged crimping line sheet bodies 33, and the adjacent sides of the two crimping line sheet bodies 33 are connected into a whole; the two crimping sheet bodies 33 are used for winding the corresponding crimping grounding lead-out wire 20 and the shielding wire harness 15 inside and are crimped and fixed. In order to avoid the slipping of the crimped lead, the connecting pressing sheet is provided with convex ribs which are arranged at intervals. The crimping process can be performed by existing crimping pliers, and will not be described in detail here.

The grounding structure of the high-voltage cable shielding layer of the electric automobile further comprises a leading-out wire heat-shrinkable tube 32 and a cable heat-shrinkable tube 60. The outgoing line heat-shrinkable tube 32 is sleeved at the joint of the grounding outgoing line 20 and the shielding wire harness 15 to protect the joint, and the outgoing line heat-shrinkable tube 32 covers the outgoing line insulating layer 22 of the grounding outgoing line 20, so that a better protection effect can be achieved. The cable heat-shrinkable tube 60 entirely houses the connection between the ground lead-out wire 20 and the shield wire harness 15 and the high-voltage cable 10. The grounding structure further comprises a corrugated pipe 50, and one end of the cable heat-shrinkable tube 60 is sleeved on the corrugated pipe 50. The bellows 50 is a complementary structure of the conventional high-voltage cable 10, and the detailed structure thereof is not described herein.

The other end of the ground lead 20 is provided with a terminal 23, and the terminal 23 is an OT terminal and is fixed on the outer side surface of the electrical component housing 40 by a screw. The OT terminals are commonly used terminal structures in the prior art and will not be described in detail herein.

When the high-voltage cable 10 is used, the high-voltage cable 10 penetrates through the corrugated pipe 50 and is led to the electric component shell 40 to be connected, and the corrugated pipe 50 plays a role in protecting the high-voltage cable 10. When the shielding layer 13 of the crude oil high-voltage cable 10 needs to be grounded, firstly, the outer insulating layer 14 at the pipe orifice at the corresponding end of a section of corrugated pipe 50 is stripped, the shielding layer 13 of the high-voltage cable 10 is exposed, and then, the shielding layer 13 is pulled to one radial side of the inner insulating layer 12 and twisted into a strand to form a shielding wire bundle 15 in a strand form; then, the lead wire heat-shrinkable tube 32 is fitted over the ground lead wire 20 or the shield harness 15, and after one end of the ground lead wire 20 and the shield harness 15 are fixed by crimping by the crimp terminal 31, the lead wire heat-shrinkable tube 32 is moved to the joint between the ground lead wire 20 and the shield harness 15 and is heat-shrunk to protect the joint. Finally, the joint of the grounding outgoing line 20 and the shielding wire harness 15 and the whole high-voltage cable 10 are sleeved inside by the cable heat-shrinkable tube 60 and are subjected to heat shrinkage, so that the outgoing of the shielding layer 13 is completed.

Embodiment 2 of a grounding structure of a high-voltage cable shielding layer of an electric vehicle according to the present invention:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the ground lead wire 20 and the shield harness 15 have a lap section which is crimped and fixed by a crimp terminal 31; in the present embodiment, the ground lead 20 is crimped to the end of the shield harness 15 in a butt joint manner.

Embodiment 3 of a grounding structure of a high-voltage cable shielding layer of an electric vehicle according to the present invention:

this embodiment is different from embodiment 1 in that, in embodiment 1, the crimp terminal 31 is a connection pressing piece; in the present embodiment, the crimp terminal 31 is a connection sleeve. The connecting pressing sleeve is also a common structure in the wire crimping field, and is not described in detail here.

Embodiment 4 of the grounding structure of the high-voltage cable shielding layer of the electric vehicle of the present invention:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the shielding harness 15 is in the form of a strand twisted into a strand; in the present embodiment, the shielded wire harness 15 is formed by extending the wires in a straight line, and arranging the wires in parallel with each other, but still integrating one wire.

Embodiment 5 of a grounding structure of a high-voltage cable shielding layer of an electric vehicle according to the present invention:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the corrugated tube 50, the connection portion between the ground lead 20 and the shielding wire harness 15, and the high voltage cable 10 are integrally sleeved with the cable heat-shrinkable tube 60; in this embodiment, the cable heat-shrinkable tube 60 only protects the connection between the ground lead-out wire 20 and the shielding wire harness 15 and the high-voltage cable 10, and is not sleeved on the corrugated tube 50.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims

1. A grounding structure of a high-voltage cable shielding layer of an electric automobile comprises a high-voltage cable (10), wherein the high-voltage cable (10) is sequentially provided with a conductive inner core (11), an inner insulating layer (12), a shielding layer (13) and an outer insulating layer (14) from inside to outside; the shielding layer (13) is integrated into one beam at one radial side of the inner insulating layer (12) to form a shielding wire harness (15); the grounding structure further comprises a grounding lead wire (20), and one end of the grounding lead wire (20) and the shielding wire harness (15) are fixed in a compression joint mode through a compression joint terminal (31) and are mutually conducted; a leading-out wire heat-shrinkable tube (32) is sleeved at the joint of the grounding leading-out wire (20) and the shielding wire harness (15) to protect the joint; the grounding structure further comprises a cable heat-shrinkable tube (60) which is used for integrally sleeving the connecting part of the grounding outgoing line (20) and the shielding wire harness (15) and the high-voltage cable (10).

2. The grounding structure of the high-voltage cable shielding layer of the electric vehicle according to claim 1, wherein the grounding lead wire (20) and the shielding harness (15) have a lap section, and the lap section is fixed by crimping by a crimping terminal (31).

3. The grounding structure of the shielding layer of the high-voltage cable of the electric automobile according to claim 1 or 2, wherein the crimping terminal (31) is a connecting pressing sheet, the connecting pressing sheet comprises two symmetrically arranged pressing line sheet bodies (33), the pressing line sheet bodies (33) are used for winding corresponding crimping grounding lead wires (20) or shielding wire harnesses (15) inside and are crimped and fixed, and adjacent sides of the two pressing line sheet bodies (33) are connected into a whole.

4. The grounding structure of the shielding layer of the high voltage cable of the electric vehicle according to claim 1 or 2, wherein the shielding strands (15) are in the form of stranded wires.

5. The grounding structure of the shielding layer of the high-voltage cable of the electric vehicle according to claim 1 or 2, wherein the terminal of the grounding outgoing line (20) is provided with a terminal (23).

6. The grounding structure of the high-voltage cable shielding layer of the electric vehicle according to claim 5, wherein the connection terminal (23) is an OT terminal.

7. The grounding structure of the shielding layer of the high-voltage cable of the electric vehicle according to claim 5, wherein the grounding lead wire (20) is fixed on the electrical component housing (40) made of metal through a terminal (23) to realize grounding of the shielding layer (13).

8. The grounding structure of the shielding layer of the high-voltage cable of the electric vehicle according to claim 1 or 2, wherein at least a portion of the cable heat-shrinkable tube (60) covers the inner insulating layer (12) of the high-voltage cable (10).

9. The grounding structure of the shielding layer of the high-voltage cable of the electric vehicle according to claim 8, wherein the grounding structure further comprises a corrugated tube (50), and one end of the cable heat-shrinkable tube (60) is sleeved on the corrugated tube (50).

10. The grounding structure of the shielding layer of the high-voltage cable of the electric vehicle according to claim 1 or 2, wherein the lead wire heat-shrinkable tube (32) covers the lead wire insulating layer (22) of the grounding lead wire (20).