Tram charging harness with waterproof function

Abstract

This utility model relates to the field of new energy vehicle technology, and in particular to a waterproof electric vehicle charging harness. It includes, from the inside out, a conductor core, an inner insulation layer, a semi-conductive resistive waterproof tape, a shielding layer, a heat-shrinkable polyolefin waterproof membrane, and an outer sheath. The inner insulation layer wraps around the conductor core, the semi-conductive resistive waterproof tape is wrapped around the inner insulation layer, the shielding layer is disposed outside the semi-conductive resistive waterproof tape, the heat-shrinkable polyolefin waterproof membrane wraps around the shielding layer, and the outer sheath covers the heat-shrinkable polyolefin waterproof membrane. This waterproof electric vehicle charging harness, through a multi-layered sealing structure design, ensures seamless connection between each layer. This structure avoids the defects of a single sealing method, effectively preventing seal failure due to aging or vibration, and significantly reducing the risk of moisture seeping into the harness.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle technology, and in particular to a waterproof electric vehicle charging harness. Background Technology

[0002] With the booming development of the global new energy vehicle industry, electric vehicles have seen their market share continue to rise due to their advantages such as environmental protection and high efficiency. As a key component connecting electric vehicles to external power sources, charging harnesses play an important role in power transmission, and their performance directly affects the safety and reliability of charging.

[0003] Currently, the waterproofing technologies commonly used in electric vehicle charging harnesses have many shortcomings: On the one hand, some harnesses use a single sealing ring or waterproof tape for protection. As the usage time increases or under the influence of vibration during vehicle operation, the sealing ring is prone to aging and deformation, and the adhesiveness of the waterproof tape will also decrease, resulting in seal failure and allowing moisture to seep into the harness. On the other hand, existing waterproofing structures often do not fully consider the synergistic waterproofing effect between various components of the harness. For example, the connection between the insulation layer, shielding layer and outer sheath is not tight enough, leaving gaps that allow moisture to easily penetrate along the interlayer gaps, making it difficult to meet the waterproofing requirements of complex usage environments. Utility Model Content

[0004] The main objective of this invention is to provide a waterproof electric vehicle charging harness, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A waterproof electric vehicle charging harness includes, from the inside out, a conductor core, an inner insulation layer, a semi-conductive resistive waterproof tape, a shielding layer, a heat-shrinkable polyolefin waterproof membrane, and an outer sheath. The inner insulation layer wraps around the conductor core, the semi-conductive resistive waterproof tape is wrapped around the inner insulation layer, the shielding layer is disposed outside the semi-conductive resistive waterproof tape, the heat-shrinkable polyolefin waterproof membrane wraps around the shielding layer, and the outer sheath covers the heat-shrinkable polyolefin waterproof membrane.

[0007] Preferably, the outer sheath is provided with a micro-permeable waterproof membrane.

[0008] By adopting the above technical solution: the outer sheath is equipped with a micro-permeable waterproof membrane, which allows water vapor to escape, avoids internal air pressure changes from damaging the seal, and prevents liquid water from entering, thus extending the service life of the wire harness.

[0009] Preferably, adhesive layers are provided between the heat-shrinkable polyolefin waterproof membrane and the shielding layer, and between the outer sheath and the heat-shrinkable polyolefin waterproof membrane.

[0010] By adopting the above technical solution, the adhesive layer ensures that the heat-shrinkable polyolefin waterproof membrane is tightly bonded to the shielding layer and the outer sheath, eliminating gaps between layers, blocking the path of water vapor penetration, and enhancing the overall waterproof performance.

[0011] Preferably, the adhesive layer adopts a continuous annular coating structure, and the thickness of the adhesive layer is 0.1 mm.

[0012] By adopting the above technical solution: the adhesive layer ensures that the heat-shrinkable polyolefin waterproof membrane is tightly bonded to the shielding layer and the outer sheath, eliminates interlayer gaps, blocks the water vapor penetration path, strengthens the overall waterproof ring-shaped continuous coating of the adhesive layer with a thickness of 0.1mm, achieves uniform and stable sealing, ensures tight connection of each component, and reduces the risk of sealing failure.

[0013] Preferably, the winding pitch of the semiconducting resistive water tape is 5mm, and there is a 1mm overlap area between two adjacent turns of the semiconducting resistive water tape.

[0014] By adopting the above technical solution, the semi-conductive resistive water tape is wound and overlapped at a specific pitch to ensure continuous and gapless water blocking, effectively intercepting trace amounts of water that have seeped in and improving the durability of waterproofing.

[0015] Preferably, the tin-plated copper wire braiding density of the shielding layer is 80-95%, and the braiding angle is 45±5°.

[0016] By adopting the above technical solution, with specific braiding density and angle of the shielding layer, both electromagnetic shielding effect and physical waterproof capability are guaranteed, thereby improving the overall performance of the wire harness.

[0017] Preferably, the inner insulation layer is tightly bonded to the conductor core, the semiconducting resistive water tape is tightly contacted to the surface of the inner insulation layer by winding, and the shielding layer completely covers the outer surface of the semiconducting resistive water tape.

[0018] By adopting the above technical solutions, the close contact relationship between each layer is clearly defined, ensuring no gaps, reducing the possibility of moisture entering, making the waterproof structure more stable, and improving the effectiveness of waterproofing.

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

[0020] 1. This utility model employs a multi-layered sealing structure design, sequentially comprising an inner insulation layer, a semi-conductive resistive waterproof tape, a shielding layer, a heat-shrinkable polyolefin waterproof membrane, and an outer sheath from the inside out. An adhesive layer is added at key connection points. The inner insulation layer tightly wraps around the conductor core, and the semi-conductive resistive waterproof tape is wrapped around it. Combined with the shielding layer and the heat-shrinkable polyolefin waterproof membrane, a physical waterproof barrier is formed. The heat-shrinkable polyolefin waterproof membrane is tightly bonded to the shielding layer through a heat-shrinking process, and the outer sheath is coated using an extrusion process. The adhesive layer adopts a continuous annular coating structure, ensuring seamless connection between layers. This structure avoids the defects of a single sealing method, effectively preventing seal failure due to aging or vibration, and significantly reducing the risk of moisture seeping into the wire harness.

[0021] 2. In this utility model, through precise structural design and optimized connection relationships, the synergistic waterproofing effect between various components is significantly enhanced. For example, the semi-conductive resistive water tape is wound with a specific pitch and has overlapping areas to ensure water-blocking continuity; the shielding layer covers the semi-conductive resistive water tape with a specific weaving density and angle, which not only ensures electromagnetic shielding function but also enhances waterproofing performance; the heat-shrinkable polyolefin waterproof membrane and the shielding layer, and the outer sheath and the heat-shrinkable polyolefin waterproof membrane are tightly bonded by an adhesive layer to form a continuous and gapless waterproof whole, effectively blocking the path of water vapor penetration along the interlayer gaps, so that the entire charging harness can still maintain excellent waterproofing performance in complex usage environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a waterproof electric vehicle charging harness according to the present invention.

[0023] Figure 2 This is a schematic diagram of the overall structure of a waterproof electric vehicle charging harness according to the present invention.

[0024] Figure 3 This is a schematic diagram of the overall structure of a waterproof electric vehicle charging harness according to the present invention.

[0025] Figure 4 This is a schematic diagram of the overall structure of a waterproof electric vehicle charging harness according to this utility model.

[0026] In the diagram: 1. Conductor core; 2. Inner insulation layer; 3. Semiconductor resistive waterproof tape; 4. Shielding layer; 5. Heat-shrinkable polyolefin waterproof membrane; 6. Outer sheath; 7. Micro-permeable waterproof membrane; 8. Adhesive layer. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Please see Figure 1-4 This utility model provides a technical solution:

[0031] A waterproof electric vehicle charging harness includes, from the inside out, a conductor core 1, an inner insulation layer 2, a semi-conductive resistive waterproof tape 3, a shielding layer 4, a heat-shrinkable polyolefin waterproof membrane 5, and an outer sheath 6. The inner insulation layer 2 wraps around the conductor core 1, the semi-conductive resistive waterproof tape 3 is wrapped around the outer surface of the inner insulation layer 2, the shielding layer 4 is disposed outside the semi-conductive resistive waterproof tape 3, the heat-shrinkable polyolefin waterproof membrane 5 wraps around the shielding layer 4, and the outer sheath 6 covers the heat-shrinkable polyolefin waterproof membrane 5.

[0032] Through the above scheme: When the waterproof electric vehicle charging harness is in operation, the inner insulation layer 2 wraps around the conductor core 1 to form basic insulation protection. The semiconductor water-blocking tape 3 is wrapped around the inner insulation layer 2. Utilizing its own hydrophilic and semi-conductive properties, it absorbs the trace amounts of water that seep in and guides them along its surface to the end of the harness for discharge, preventing water from accumulating inside. The shielding layer 4 covers the semiconductor water-blocking tape 3, which on the one hand achieves electromagnetic shielding and on the other hand enhances physical protection. The heat-shrinkable polyolefin waterproof membrane 5 is heated and shrunk to tightly wrap the shielding layer 4, eliminating gaps. The outer sheath 6 finally covers the waterproof membrane 5, forming the outermost layer of protection. Each component is progressively enhanced. The semiconductor water-blocking tape 3, as the intermediate key water-blocking layer, works with other layers to form a three-dimensional waterproof structure, blocking the path of water vapor penetration and ensuring the safe operation of the charging harness in a humid environment.

[0033] In this embodiment, a micro-permeable waterproof membrane 7 is provided on the outer sheath 6; adhesive layers 8 are respectively provided between the heat-shrinkable polyolefin waterproof membrane 5 and the shielding layer 4, and between the outer sheath 6 and the heat-shrinkable polyolefin waterproof membrane 5; the adhesive layer 8 adopts a continuous annular coating structure, and the thickness of the adhesive layer 8 is 0.1mm; the winding pitch of the semi-conductive resistive water tape 3 is 5mm, and there is a 1mm overlap area between two adjacent turns of the semi-conductive resistive water tape 3; the braiding density of the tinned copper wire of the shielding layer 4 is 80-95%, and the braiding angle is 45±5°; the inner insulation layer 2 is tightly attached to the conductor core 1, the semi-conductive resistive water tape 3 is in close contact with the surface of the inner insulation layer 2 by winding, and the shielding layer 4 completely covers the outer surface of the semi-conductive resistive water tape 3.

[0034] Through the above scheme: the inner insulation layer 2 is tightly attached to the conductor core 1 to form basic insulation protection; the semiconductor water-blocking tape 3 is wrapped around the inner insulation layer 2 with a 5mm pitch, and the 1mm overlap between adjacent loops ensures the continuity of water blocking; it uses hydrophilicity to absorb the trace amount of water that seeps in, and guides the water to the end of the wire harness for discharge through its semi-conductive properties; the shielding layer 4 covers the semiconductor water-blocking tape 3 with a braiding density of 80-95% and an angle of 45±5°, which not only achieves electromagnetic shielding, but also enhances physical protection; the heat-shrinkable polyolefin waterproof membrane 5 is tightly bonded to the shielding layer 4 through the adhesive layer 8, and the gap is eliminated by heating and shrinking; the outer sheath 6 is then connected to the waterproof membrane 5 through the adhesive layer 8; the 0.1mm thick adhesive layer 8 with continuous ring coating ensures seamless connection between layers; the micro-permeable waterproof membrane 7 balances the internal air pressure and prevents liquid water from entering; all components work together to effectively block water vapor penetration.

[0035] It should be noted that this utility model is a waterproof electric vehicle charging harness. In use, firstly, the inner insulation layer 2 wraps around the conductor core 1 to form basic insulation protection. The semiconductor water-blocking tape 3 is wrapped around the outer side of the inner insulation layer 2. Utilizing its own hydrophilicity and semi-conductive properties, it absorbs the trace amounts of water that seep in and guides them along its surface to the end of the harness for discharge, preventing water from accumulating inside. The shielding layer 4 covers the semiconductor water-blocking tape 3, which achieves electromagnetic shielding on the one hand and enhances physical protection on the other. The heat-shrinkable polyolefin waterproof membrane 5 is heated and shrunk to tightly wrap the shielding layer 4, eliminating gaps. Finally, the outer sheath 6 covers the waterproof membrane 5, forming the outermost layer of protection. Each component is progressively enhanced. The semiconductor water-blocking tape 3, as the intermediate key water-blocking layer, works in conjunction with other layers to form a three-dimensional waterproof structure, blocking the path of water vapor penetration and ensuring the safe operation of the charging harness in a humid environment.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A waterproof electric vehicle charging harness, comprising, from the inside out, a conductor core (1), an inner insulation layer (2), a semi-conductive resistive water tape (3), a shielding layer (4), a heat-shrinkable polyolefin waterproof membrane (5), and an outer sheath (6), characterized in that: The inner insulation layer (2) wraps the conductor core (1), the semiconducting water resistance tape (3) is wrapped around the inner insulation layer (2), the shielding layer (4) is disposed outside the semiconducting water resistance tape (3), the heat-shrinkable polyolefin waterproof membrane (5) wraps the shielding layer (4), and the outer sheath (6) covers the heat-shrinkable polyolefin waterproof membrane (5).

2. The electric vehicle charging harness with waterproof function according to claim 1, characterized in that: The outer sheath (6) is provided with a micro-permeable waterproof membrane (7).

3. The electric vehicle charging harness with waterproof function according to claim 1, characterized in that: An adhesive layer (8) is provided between the heat-shrinkable polyolefin waterproof membrane (5) and the shielding layer (4), and between the outer sheath (6) and the heat-shrinkable polyolefin waterproof membrane (5).

4. A waterproof electric vehicle charging harness according to claim 3, characterized in that: The adhesive layer (8) adopts a continuous annular coating structure, and the thickness of the adhesive layer (8) is 0.1 mm.

5. A waterproof electric vehicle charging harness according to claim 1, characterized in that: The winding pitch of the semiconducting resistive water tape (3) is 5mm, and there is a 1mm overlap area between two adjacent turns of the semiconducting resistive water tape (3).

6. A waterproof electric vehicle charging harness according to claim 1, characterized in that: The tin-plated copper wire braiding density of the shielding layer (4) is 80-95%, and the braiding angle is 45±5°.

7. A waterproof electric vehicle charging harness according to claim 1, characterized in that: The inner insulation layer (2) is closely attached to the conductor core (1), the semiconducting resistive water tape (3) is in close contact with the surface of the inner insulation layer (2) by winding, and the shielding layer (4) completely covers the outer surface of the semiconducting resistive water tape (3).

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