Low-voltage filtering assembly and low-voltage wire harness applying same

Abstract

The utility model relates to the technical field of electric connecting wires, discloses a low-voltage filtering assembly and a low-voltage wire harness using the same, and aims to reduce the magnetic leakage amount of a low-voltage magnetic ring, improve the filtering performance of the low-voltage magnetic ring and further improve the electromagnetic compatibility of the low-voltage wire harness. The low-voltage filtering assembly comprises a magnetic ring seat which is provided with a mounting cavity; the low-voltage magnetic ring is annular and is arranged in the mounting cavity, and the low-voltage magnetic ring is formed by splicing two magnetic ring bodies which are arranged around the axis; the magnet ring body comprises a first magnet part and a second magnet part; the first magnet part and the second magnet part are sequentially arranged and connected in the axial direction of the low-voltage magnetic ring; in the circumferential direction of the low-voltage magnetic ring, one side of the first magnet part protrudes out of the second magnet part; in the two magnetic ring bodies, the first magnet part of the first magnetic ring body and the second magnet part of the second magnetic ring body are oppositely arranged; and the second magnet part of the first magnet ring body is opposite to the first magnet part of the second magnet ring body.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connecting wires, in particular to a low-voltage filter component and a low-voltage wire harness using the same. Background Art

[0002] As a core component of electric vehicles, the reliability and safety of motor control systems directly impact the overall vehicle's operating quality. With the development of new energy vehicles, the requirements for the electromagnetic compatibility (EMC) performance of motor control systems are becoming increasingly stringent. High and low voltage ports are the primary discharge paths for electromagnetic noise in motor controllers. However, current designs primarily focus on optimizing the wiring harness for the high-voltage port to improve its EMC performance, while often overlooking the impact of electromagnetic noise from the low-voltage port.

[0003] In related technologies, low-voltage wiring harnesses are often filtered using low-voltage filters. Low-voltage filters are usually made up of two semicircular rings spliced ​​together to be sleeved on the outside of the wiring harness, but their filtering performance is poor, which leads to poor electromagnetic compatibility performance of the low-voltage wiring harness. Utility Model Content

[0004] In view of this, the present invention provides a low-voltage filter assembly and a low-voltage wiring harness using the same, so as to solve the problem that the filtering performance of the low-voltage filter is poor, which in turn leads to poor electromagnetic compatibility performance of the low-voltage wiring harness.

[0005] In the first aspect, the utility model provides a low-voltage filter assembly, which is applied to a low-voltage wiring harness. The low-voltage filter assembly includes: a magnetic ring seat, which is formed with a mounting cavity; a low-voltage magnetic ring, which is annular and is arranged in the mounting cavity, and the low-voltage magnetic ring is formed by splicing two magnetic ring bodies arranged around an axis; the magnetic ring body includes a first magnetic part and a second magnetic part; along the axial direction of the low-voltage magnetic ring, the first magnetic part and the second magnetic part are arranged in sequence and connected; along the circumference of the low-voltage magnetic ring, one side of the first magnetic part protrudes from the second magnetic part; wherein, of the two magnetic ring bodies, the first magnetic part of the first magnetic ring body is arranged opposite to the second magnetic part of the second magnetic ring body; the second magnetic part of the first magnetic ring body is arranged opposite to the first magnetic part of the second magnetic ring body.

[0006] In an optional embodiment, the outer peripheral walls of the two magnetic ring bodies abut against the inner wall of the installation cavity, and the inner wall of the installation cavity is provided with a plurality of protrusions.

[0007] In an optional embodiment, the magnetic ring seat is cylindrical and is provided with an opening. The opening extends axially and passes through the end faces of the magnetic ring seat at both ends along the axial direction, and the opening is connected to the installation cavity.

[0008] In an optional embodiment, the low-voltage filter assembly also includes a cover plate, the magnetic ring seat is cylindrical, the first axial end of the magnetic ring seat is detachably connected to the cover plate, the second axial end of the magnetic ring seat is provided with a limiting ring, and the low-voltage magnetic ring is clamped between the cover plate and the limiting ring; and / or, a connecting piece is fixedly connected to the outer side of the magnetic ring seat, and a connecting hole is provided on the connecting piece.

[0009] In a second aspect, the present invention further provides a low-voltage wiring harness, comprising: a wiring harness group; and a low-voltage filter assembly such as the above, which is sleeved on the outside of the wiring harness group.

[0010] In an optional embodiment, the wiring harness group includes cables, and the cables are twisted-pair structures; and / or, the cables are provided in multiple groups.

[0011] In an optional embodiment, the wiring harness group further includes a shielding net, which is wrapped around the outside of the cable.

[0012] In an optional embodiment, the shielding net includes a main body, a connecting wire and a grounding terminal. The main body is wrapped around the outside of the cable, and the connecting wire is fixedly connected between the main body and the grounding terminal.

[0013] In an optional embodiment, the wiring harness group further includes a protective layer, which is coated on the outside of the shielding net.

[0014] In an optional embodiment, the low-voltage wiring harness further includes a low-voltage male plug and a low-voltage female plug, and the low-voltage male plug and the low-voltage female plug are respectively connected to two ends of the wiring harness group.

[0015] The technical solution of the present utility model has at least the following advantages:

[0016] 1. The low-voltage magnetic ring is formed by joining two magnetic ring bodies arranged around an axis. The first magnetic portion of the first magnetic ring body is arranged opposite the second magnetic portion of the second magnetic ring body, and the second magnetic portion of the first magnetic ring body is arranged opposite the first magnetic portion of the second magnetic ring body. Because the first and second magnetic portions are arranged sequentially and connected along the axial direction of the low-voltage magnetic ring, and one side of the first magnetic portion protrudes from the second magnetic portion along the circumference of the low-voltage magnetic ring, the gap at the junction of the two magnetic ring bodies is a broken line rather than a straight line. This reduces the magnetic flux leakage of the low-voltage magnetic ring, improves the filtering performance of the low-voltage magnetic ring, and thus improves the electromagnetic compatibility of the low-voltage wiring harness in which it is used.

[0017] 2. Multiple raised portions are provided between the outer wall of the magnetic ring and the inner wall of the mounting cavity, which can improve the stability of the low-voltage magnetic ring. The magnetic ring seat can secure the two magnetic rings together through an interference fit, reducing the number of parts, the number of installation steps, and the cost.

[0018] 3. A low-voltage filter component is provided on the low-voltage wiring harness to realize the filtering function of the low-voltage wiring harness, thereby improving the electromagnetic compatibility performance of the low-voltage wiring harness.

[0019] 4. The low-voltage wiring harness uses twisted-pair cables, which can reduce the electromagnetic interference of the cables themselves to the controller system and improve the stability and reliability of low-voltage signal communication.

[0020] 5. Combining the shielding mesh with the twisted pair wires makes the electromagnetic compatibility performance of the low-voltage wiring harness assembly better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of a low-voltage wiring harness according to an embodiment of the present utility model;

[0023] Figure 2 This is a schematic structural diagram of a cable according to an embodiment of the present utility model;

[0024] Figure 3 This is a schematic structural diagram of a shielding net according to an embodiment of the present utility model;

[0025] Figure 4 This is a structural diagram of a low-voltage filter assembly according to an embodiment of the present utility model;

[0026] Figure 5 This is a schematic structural diagram of a low-voltage magnetic ring according to an embodiment of the present utility model;

[0027] Figure 6 This is a structural schematic diagram of a magnetic ring body according to an embodiment of the present utility model;

[0028] Figure 7 for Figure 6 A top view of

[0029] Figure 8 for Figure 6 Side view of

[0030] Figure 9 This is a structural schematic diagram of a magnetic ring seat and a cover plate according to an embodiment of the present utility model;

[0031] Figure 10 A side view of one axial end of a magnetic ring seat and a partial enlarged view thereof are provided in accordance with an embodiment of the present invention;

[0032] Figure 11 for Figure 10 Section view at AA in the middle.

[0033] Description of reference numerals:

[0034] 1. Low-voltage male plug; 2. Cable; 3. Shielding net; 31. Main body; 32. Connecting wire; 33. Grounding terminal; 4. Low-voltage filter assembly; 41. Magnetic ring seat; 410. Mounting cavity; 411. Raised portion; 412. Opening; 413. Limiting ring; 414. Connector; 42. Low-voltage magnetic ring; 421. Magnetic ring body; 4211. First magnetic portion; 4212. Second magnetic portion; 43. Cover; 5. Protective layer; 6. Low-voltage female plug. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0036] The following combination Figures 1 to 11 , describing the embodiments of the present utility model.

[0037] According to an embodiment of the present invention, on the one hand, a low-voltage filter assembly 4 is provided, which is applied to a low-voltage wiring harness. Specifically, the low-voltage filter assembly 4 is sleeved on the outside of the wiring harness group of the low-voltage wiring harness to realize the filtering function of the low-voltage wiring harness.

[0038] Specifically, if Figure 4-11 As shown, the filter assembly includes a magnetic ring seat 41 and a low-voltage magnetic ring 42. A mounting cavity 410 is formed in the magnetic ring seat 41. The low-voltage magnetic ring 42 is annular and is disposed in the mounting cavity 410. The low-voltage magnetic ring 42 is formed by combining two magnetic ring bodies 421 arranged around the axis of the low-voltage magnetic ring 42. The magnetic ring body 421 includes a first magnetic portion 4211 and a second magnetic portion 4212. Along the axial direction of the low-voltage magnetic ring 42, the first magnetic portion 4211 and the second magnetic portion 4212 are arranged in sequence and connected; along the circumference of the low-voltage magnetic ring 42, one side of the first magnetic portion 4211 protrudes from the second magnetic portion 4212. Among the two magnetic ring bodies 421 , the first magnet portion 4211 of the first magnetic ring body 421 is arranged opposite to the second magnet portion 4212 of the second magnetic ring body 421 ; the second magnet portion 4212 of the first magnetic ring body 421 is arranged opposite to the first magnet portion 4211 of the second magnetic ring body 421 .

[0039] In this embodiment, the low-voltage magnetic ring 42 is formed by splicing two magnetic ring bodies 421 arranged around the axis. Since the first magnetic portion 4211 and the second magnetic portion 4212 of the magnetic ring body 421 have different circumferential extension lengths, the gap at the splicing point of the two magnetic ring bodies 421 is a broken line rather than a straight line, which reduces the leakage magnetic flux of the low-voltage magnetic ring 42 and improves the filtering performance of the low-voltage magnetic ring 42, thereby improving the electromagnetic compatibility of the low-voltage wiring harness to which it is applied.

[0040] It should be noted that if Figure 8 As shown, in the magnetic ring body 421, the cross-sectional profiles of the first magnet portion 4211 and the second magnet portion 4212 along the axial direction are both fan-shaped. Figure 6 As shown, the central angle of the first magnet portion 4211 is greater than 90 degrees, the circular angle of the second magnet portion 4212 is less than 90 degrees, and the sum of the circular angles of the first magnet portion 4211 and the second magnet portion 4212 is approximately 360 degrees, so that the two magnet portions can be assembled into an annular low-voltage magnetic ring 42. The present invention does not impose a specific limitation on the central angles of the first magnet portion 4211 and the second magnet portion 4212. As long as the sum of the central angles of the two is approximately 360 degrees, the two magnet portions can be assembled into an annular structure.

[0041] It can be understood that the first magnet part 4211 and the second magnet part 4212 can be integrally formed. Along the circumference of the low-voltage magnetic ring 42, one side of the first magnet part 4211 protrudes from the second magnet part 4212, while the other side is flush with the second magnet part 4212, so as to facilitate the splicing of the two magnetic ring bodies 421.

[0042] In some embodiments, the axial joint of the two magnetic ring bodies 421 can be rotatably connected to facilitate installation on the wiring harness assembly. Specifically, along the axial direction of the low-voltage magnetic ring 42, the two first magnet portions 4211 of the two magnetic ring bodies 421 are arranged adjacent to each other, and the opposing surfaces of the two are the axial joint of the two magnetic ring bodies 421, and the opposing surfaces of the two first magnet portions 4211 are hinged. Alternatively, in some embodiments, the two magnetic ring bodies 421 can also be arranged independently of each other and crimped onto the wiring harness assembly through the magnetic ring seat 41.

[0043] In some embodiments, the outer walls of the two magnetic ring bodies 421 abut against the inner wall of the mounting cavity 410, and the inner wall of the mounting cavity 410 is provided with multiple protrusions 411. The multiple protrusions 411 provided between the outer walls of the magnetic ring bodies 421 and the inner wall of the mounting cavity 410 can improve the stability of the low-voltage magnetic ring 42. The magnetic ring seat 41 can secure the two magnetic ring bodies 421 through an interference fit, reducing the number of parts, thereby shortening the installation process and lowering costs.

[0044] For example, Figure 9As shown, the magnetic ring seat 41 is cylindrical, and the mounting cavity 410 formed therein is cylindrical to facilitate compatibility with the annular low-voltage magnetic ring 42. Accordingly, the protrusions 411 on the inner wall of the mounting cavity 410 are elongated and are provided in multiple circumferentially spaced portions. For example, the protrusions 411 can be integrally formed on the inner wall of the magnetic ring seat 41, that is, on the inner wall of the mounting cavity 410.

[0045] In some embodiments, the magnetic ring seat 41 is cylindrical and has an opening 412 thereon. The opening 412 extends axially and penetrates the end surfaces of the magnetic ring seat 41 at both axial ends, and the opening 412 is in communication with the mounting cavity 410. Providing the opening 412 on the magnetic ring seat 41 can relieve the installation stress of the low-voltage magnetic ring 42 and increase the toughness of the magnetic ring seat 41.

[0046] In some embodiments, the low-voltage filter assembly 4 further includes a cover plate 43, a magnetic ring seat 41 having a cylindrical shape, a first axial end of the magnetic ring seat 41 being detachably connected to the cover plate 43, a second axial end of the magnetic ring seat 41 being provided with a retaining ring 413, and the low-voltage magnetic ring 42 being sandwiched between the cover plate 43 and the retaining ring 413. The retaining ring 413 and the magnetic ring seat 41 retain the low-voltage magnetic ring 42 within the mounting cavity 410, preventing the magnetic ring from shaking or falling during operation of the motor control system, which could result in failure of the filtering function, thereby ensuring the filtering effect.

[0047] Exemplarily, the cover plate 43 is a plate-like structure, and its cross-sectional profile can be annular, or fan-shaped, or other shapes, as long as it can play an axial limiting role on the low-voltage magnetic ring 42 .

[0048] For example, the cover plate 43 can be snap-fitted or bolted to the magnetic ring seat 41, preferably snap-fitted for easy assembly and disassembly. For example, the cover plate 43 is provided with a hanging ear, which extends toward the magnetic ring seat 41, and a clamping block is provided on the outer side of the magnetic ring seat 41, and the hanging ear is snap-fitted to the clamping block.

[0049] It can be understood that the low-voltage magnetic ring 42, the magnetic ring seat 41 and the middle portion of the cover plate 43 are all formed with a through hole to facilitate the passage of the wiring harness group of the low-voltage wiring harness.

[0050] In some embodiments, a connector 414 is fixedly connected to the outside of the magnetic ring seat 41, and a connecting hole is provided on the connector 414. The connector 414 can be used to install the low-voltage filter assembly 4 on the housing of the motor control system through the connecting hole, thereby fixing the position of the low-voltage magnetic ring 42 and limiting the direction of the wiring harness group therein. Exemplarily, two connectors 414 are provided, and the two connectors 414 are symmetrically arranged on both sides of the axis of the magnetic ring seat 41, and the above-mentioned opening 412 is located between the two connectors 414. It can be understood that the present invention does not specifically limit the number of connectors 414. The connectors 414 can be provided with one, two, three or more, as long as the installation requirements are met.

[0051] According to an embodiment of the present invention, on the other hand, a low voltage wiring harness is provided. Figure 1 As shown, the wiring harness assembly includes a low-voltage filter assembly 4 as described in the above embodiment, and the low-voltage filter assembly 4 is sleeved on the outside of the wiring harness assembly. Specifically, the low-voltage magnetic ring 42, the magnetic ring seat 41, and the middle portion of the cover plate 43 are collectively formed with a through-hole, and the low-voltage filter assembly 4 is sleeved on the outside of the wiring harness assembly through the through-hole.

[0052] In this embodiment, a low-voltage filter assembly 4 is provided on the low-voltage wiring harness, thereby achieving a filtering function for the low-voltage wiring harness and improving the electromagnetic compatibility of the low-voltage wiring harness. Furthermore, the gap at the junction of the two magnetic ring bodies 421 of the low-voltage filter assembly 4 is in the shape of a broken line, which reduces the magnetic flux leakage of the low-voltage magnetic ring 42, improves the filtering performance of the low-voltage magnetic ring 42, and further improves the electromagnetic compatibility of the low-voltage wiring harness.

[0053] In some embodiments, as Figure 2 As shown, the wiring harness group includes a cable 2, which is a twisted pair structure. The twisted pair structure specifically refers to two insulated cables 2 twisted together in a clockwise rotation. In this embodiment, the cable 2 of the low-voltage wiring harness adopts a twisted pair structure, which can reduce the electromagnetic interference of the cable 2 itself to the controller system and improve the stability and reliability of low-voltage signal communication. In addition, selecting an appropriate twist pitch according to the application of the wiring harness group can ensure the service life and anti-interference ability of the twisted pair, control the cost of twisting the pair, and facilitate the inspection of the industrial operation standards of workers.

[0054] In some embodiments, the wiring harness group may include multiple groups of cables 2, and the cables 2 are twisted-pair structures, that is, each group of cables 2 includes two cables 2 twisted together. The present invention does not specifically limit the number of cables 2 provided. The number of twisted pairs can be adaptively adjusted according to the electromagnetic compatibility requirements of the product, thereby adjusting the electromagnetic interference resistance of the low-voltage wiring harness. It is understandable that in some embodiments, each group of cables 2 may also include one or more cables 2, that is, the cables 2 are non-twisted-pair structures.

[0055] In some embodiments, the wiring harness assembly further includes a shielding mesh 3, which is wrapped around the outside of the cable 2. Combining the shielding mesh 3 with the twisted pair wires improves the electromagnetic compatibility performance of the low-voltage wiring harness assembly. It is understood that the shielding mesh 3 is a metal mesh braided layer, which can be made of red copper or tinned copper. The shielding mesh 3, wrapped around the outside of the cable 2, can isolate electromagnetic noise sources and enhance the low-voltage wiring harness's anti-interference capabilities.

[0056] Specifically, in some embodiments, Figure 3As shown, the shielding net 3 includes a main body 31, a connecting wire 32, and a grounding terminal 33. The main body 31 is wrapped around the outside of the cable 2, and the connecting wire 32 is fixedly connected between the main body 31 and the grounding terminal 33. The main body 31 is also the metal mesh braided layer mentioned above. One end of the connecting wire 32 is connected to the main body 31 by welding or other means, and the other end is connected to the grounding terminal 33 by welding, crimping, or other means.

[0057] For example, the ground terminal 33 can be connected to the housing of the motor control system, such as by bolting or clamping, to achieve grounding, thereby improving the shielding effect of the shielding net 3. It is understandable that, depending on the electromagnetic compatibility requirements of different products, the ground terminal 33 of the shielding net 3 can be selectively grounded to adjust the electromagnetic compatibility performance of the low-voltage wiring harness.

[0058] In some embodiments, as Figure 1 As shown, the wiring harness assembly further includes a protective layer 5, which is coated on the outside of the shielding net 3 to secure the shielding net 3 to the wiring harness assembly and provide protection for the wiring harness assembly. For example, the protective layer 5 may be a layer of wear-resistant material and may be bonded to the outside of the shielding net 3 and to portions of the cable 2. For example, the protective layer 5 may be an anti-wear tape.

[0059] In some embodiments, as Figure 1 As shown, the low-voltage wiring harness also includes a low-voltage male plug 1 and a low-voltage female plug 6, which are respectively connected to the two ends of the wiring harness assembly. The low-voltage male plug 1 and the low-voltage female plug 6 can realize the signal connection function between the entire vehicle and the circuit board through the wiring harness assembly, facilitating the direct application of the low-voltage wiring harness in the motor control system. For example, the low-voltage male plug 1 and the low-voltage female plug 6 can be crimped or twisted to the two ends of the wiring harness assembly, so that the low-voltage male plug 1, the wiring harness assembly, and the low-voltage female plug 6 form an integrated structure with a stable electrical connection.

[0060] The assembly method of the low-voltage wiring harness of the present invention is as follows: one end of the wiring harness group is crimped to the low-voltage male plug 1, and the other end is crimped to the low-voltage female plug 6; after the shielding net 3 wraps the cable 2 inside, the shielding net 3 is wrapped with anti-wear tape to fix the position of the shielding net 3 and the cable 2; the low-voltage filter component 4 passes through the cable 2 wrapped with the anti-wear tape and with the shielding net 3 to realize the low-voltage filtering function.

[0061] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A low-voltage filter assembly, used in low-voltage wiring harness, characterized in that: The low-voltage filter assembly (4) comprises: A magnetic ring seat (41) is formed with a mounting cavity (410); A low-voltage magnetic ring (42) is annular and is disposed in the mounting cavity (410). The low-voltage magnetic ring (42) is formed by splicing two magnetic ring bodies (421) arranged around an axis. The magnetic ring body (421) includes a first magnetic portion (4211) and a second magnetic portion (4212). Along the axial direction of the low-voltage magnetic ring (42), the first magnetic portion (4211) and the second magnetic portion (4212) are arranged in sequence and connected. Along the circumferential direction of the low-voltage magnetic ring (42), one side of the first magnetic portion (4211) protrudes from the second magnetic portion (4212). Among the two magnetic ring bodies (421), the first magnetic part (4211) of the first magnetic ring body (421) and the second magnetic part (4212) of the second magnetic ring body (421) are arranged opposite to each other; the second magnetic part (4212) of the first magnetic ring body (421) and the first magnetic part (4211) of the second magnetic ring body (421) are arranged opposite to each other.

2. The low-voltage filter assembly according to claim 1, characterized in that: The outer peripheral walls of the two magnetic ring bodies (421) abut against the inner wall of the installation cavity (410), and the inner wall of the installation cavity (410) is provided with a plurality of protrusions (411).

3. The low-voltage filter assembly according to claim 1 or 2, characterized in that: The magnetic ring seat (41) is cylindrical and is provided with an opening (412). The opening (412) extends axially and passes through the end faces of the magnetic ring seat (41) at both ends along the axial direction, and the opening (412) is communicated with the installation cavity (410).

4. The low-voltage filter assembly according to claim 1 or 2, characterized in that: The low-voltage filter assembly (4) further comprises a cover plate (43), the magnetic ring seat (41) is cylindrical, the first end of the magnetic ring seat (41) along the axial direction is detachably connected to the cover plate (43), the second end of the magnetic ring seat (41) along the axial direction is provided with a limiting ring (413), and the low-voltage magnetic ring (42) is sandwiched between the cover plate (43) and the limiting ring (413); and / or, A connecting piece (414) is fixedly connected to the outer side of the magnetic ring seat (41), and a connecting hole is provided on the connecting piece (414).

5. A low voltage wiring harness, characterized in that: include: Wiring harness set; The low-voltage filter assembly (4) according to any one of claims 1 to 4 is sleeved on the outside of the wiring harness group.

6. The low-voltage wiring harness according to claim 5, characterized in that: The wiring harness group includes a cable (2), and the cable (2) is a twisted pair structure; and / or, The cables (2) are provided in multiple groups.

7. The low-voltage wire harness according to claim 6, characterized in that: The wiring harness group further comprises a shielding net (3), and the shielding net (3) is coated on the outside of the cable (2).

8. The low-voltage wire harness according to claim 7, characterized in that: The shielding net (3) comprises a main body (31), a connecting wire (32) and a grounding terminal (33); the main body (31) is wrapped around the outside of the cable (2); and the connecting wire (32) is fixedly connected between the main body (31) and the grounding terminal (33).

9. The low-voltage wire harness according to claim 7, characterized in that: The wiring harness group further comprises a protective layer (5), and the protective layer (5) is coated on the outside of the shielding net (3).

10. The low voltage wire harness according to any one of claims 5 to 9, characterized in that: The low-voltage wiring harness further comprises a low-voltage male plug (1) and a low-voltage female plug (6), wherein the low-voltage male plug (1) and the low-voltage female plug (6) are respectively connected to two ends of the wiring harness group.

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