High-voltage cable in new energy automobile

Abstract

The invention relates to the technical field of high-voltage cables, in particular to an in-vehicle high-voltage cable of a new energy automobile, which comprises a conductor, an insulating layer, a shielding layer, an aluminum foil layer, an inner sheath and an outer sheath, when the inner sheath rotates, the inner sheath drives the outer sheath far away from one end of a connecting ring to move, and under the action of a reinforcing piece in the outer sheath, the outer sheath is twisted, so that the inner sheath is prevented from rotating; the end, away from the connecting ring, of the outer sheath moves relative to the axis of the inner sheath, the distance between every two adjacent sliding rings on the outer sheath changes, the air pressure of a cavity formed by every two adjacent sliding rings, the inner side wall of the outer sheath and the outer side wall of the inner sheath is increased, and the increased air pressure can extrude the outer sheath. The force applied to the outer sheath by the hoop or the ribbon to extrude the inner sheath is reduced, so that the inner sheath and the internal structure are prevented from generating torque.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage cables, and in particular to a high-voltage cable for use in new energy vehicles. Background Art

[0002] In the electrical system of new energy vehicles, high-voltage cables in the vehicle are an indispensable component. Usually, when a part of the cable is fixed by a fixed structure such as a clamp or a cable tie, if the other parts of the cable are twisted while the fixed part remains stationary, torque will be generated on the cable. During the operation of new energy vehicles, due to factors such as continuous vibration of the vehicle and the constant change of driving status, the cable will be frequently subjected to various forces, which will easily produce long-term alternating torque. Under the influence of this alternating torque for a long time, the cable is prone to fatigue damage. For example, the insulation layer of the cable may gradually crack or even break, which will greatly reduce the electrical performance of the cable, and in severe cases may cause safety hazards such as short circuit and leakage; at the same time, the conductor inside the cable may also break due to fatigue, which will seriously affect the normal operation of the electrical system of the new energy vehicle. This situation will not only reduce the reliability and safety of the new energy vehicle, but also increase the maintenance cost and use risk. Summary of the invention

[0003] The present invention provides a high-voltage cable in a new energy vehicle, so as to solve the problem that the existing high-voltage cable in a new energy vehicle is fatigue-damaged due to the torque generated by the asynchronous twisting of a fixing part and other parts.

[0004] A high-voltage cable for a new energy vehicle of the present invention adopts the following technical solution: A high-voltage cable for use in a new energy vehicle comprises a conductor, an insulating layer, a shielding layer, an aluminum foil layer, an inner sheath and an outer sheath.

[0005] The insulating layer is coated on the outside of the conductor; the shielding layer is coated on the outside of the insulating layer; the aluminum foil layer is coated on the outside of the shielding layer; the inner sheath is coated on the outside of the aluminum foil layer, the outer wall of the inner sheath is provided with a mounting ring groove, the outer wall of the inner sheath is provided with a plurality of friction protrusions, the plurality of friction protrusions can form a plurality of friction rings on the outer side of the inner sheath, and the plurality of friction rings are distributed at intervals; the outer sheath is sleeved on the outer side of the inner sheath, a reinforcement is provided inside the outer sheath, and the reinforcement is used to prevent the total length of the outer sheath from changing; the inner wall of the outer sheath is provided with a connecting ring and a sliding ring, and the connecting ring is rotatably arranged in the mounting ring groove; a plurality of sliding rings are provided, each sliding ring is arranged between two adjacent friction rings, and each sliding ring abuts against the outer wall of the inner sheath; the connecting ring and the plurality of sliding rings are evenly arranged along the length direction of the outer sheath, and the outer wall area corresponding to the connecting ring and the adjacent sliding rings is a fixed area.

[0006] Furthermore, the outer sheath is arranged in a quasi-annular wave shape, wherein the reinforcement is arranged at the trough of the outer sheath, and the trough of the outer sheath contacts the outer side wall of the inner sheath.

[0007] Furthermore, the reinforcement includes multiple steel wires. When the outer sheath and the inner sheath are not impacted by external force, the length of the steel wires is equal to the length of the outer sheath. The multiple steel wires are embedded in the outer sheath, and the multiple steel wires are evenly distributed around the circumference of the outer sheath. The steel wires are set at the trough of the outer sheath.

[0008] Further, the sliding ring has an inner end contacting the inner sleeve and an outer end connected to the outer sleeve, and the distance between the inner end of the sliding ring and the mounting ring groove is smaller than the distance between the outer end of the sliding ring and the mounting ring groove.

[0009] Furthermore, the distance between two adjacent sliding rings is the same; the distance between two adjacent friction rings is the same.

[0010] Furthermore, the distance between two adjacent sliding rings is the same; as the distance gradually moves away from the mounting ring groove, the distance between two adjacent friction rings gradually increases.

[0011] Furthermore, the friction protrusion is in the shape of an elongated strip, the length of the friction protrusion is parallel to the axial direction of the inner sleeve, a plurality of friction protrusions are arranged at intervals along the circumference of the inner sleeve to form a friction ring, and the distance between two adjacent friction protrusions is equal to the distance between two wave valleys of the outer sleeve.

[0012] Furthermore, the friction protrusion is block-shaped, multiple friction protrusions are arranged to form a friction strip along the axial direction of the inner sleeve, multiple friction strips are arranged to form a friction ring along the circumferential direction of the inner sleeve, and the distance between two adjacent friction strips is equal to the distance between two troughs of the outer sleeve.

[0013] Furthermore, multiple outer sheaths are provided, and two adjacent outer sheaths abut against each other. Multiple mounting ring grooves are provided on the outer side wall of the inner sheath, and each connecting ring on the outer sheath is rotatably provided in a mounting ring groove.

[0014] Furthermore, the insulating layer is cross-linked polyolefin; the shielding layer is tinned copper wire; the aluminum foil layer is single-sided aluminum foil; the inner sheath is cross-linked polyolefin; and the outer sheath is cross-linked polyolefin.

[0015] The beneficial effects of the present invention are as follows: a high-voltage cable for use in a new energy vehicle of the present invention comprises a conductor, an insulating layer, a shielding layer, an aluminum foil layer, an inner sheath and an outer sheath. When preparing a high-voltage cable for use in a new energy vehicle, the insulating layer is coated on the outside of the conductor, the shielding layer is coated on the outside of the insulating layer, the aluminum foil layer is coated on the outside of the shielding layer, the inner sheath is coated on the outside of the aluminum foil layer, and the outer sheath is sleeved on the outside of the inner sheath. When the prepared high-voltage cable is assembled on a new energy vehicle for use, a clamp or a cable tie is used to fix the outer sheath on the new energy vehicle in a fixed area on the outer side wall of the outer sheath. Due to the continuous vibration of the vehicle and the continuous change of the driving state, the inner sheath, the aluminum foil layer, the shielding layer, the insulating layer and the conductor form a whole and are subjected to alternating torque. The inner sheath It can drive the internal structure to move synchronously by arranging multiple friction rings and mounting ring grooves on the outer wall of the inner sleeve, and the outer wall area corresponding to the connecting ring and the adjacent sliding ring on the outer sleeve is a fixed area. When the inner sleeve rotates, the inner sleeve drives the outer sleeve away from the connecting ring to move. Under the action of the internal reinforcement of the outer sleeve, the outer sleeve is twisted, and the end of the outer sleeve away from the connecting ring moves relative to the axis of the inner sleeve. The distance between the two adjacent sliding rings on the outer sleeve changes, and the air pressure in the chamber formed by the two adjacent sliding rings, the inner wall of the outer sleeve and the outer wall of the inner sleeve increases. The increased air pressure can squeeze the outer sleeve, reduce the force exerted by the clamp or cable tie on the outer sleeve to squeeze the inner sleeve, and thereby avoid torque generated in the inner sleeve and the internal structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the structure of a high-voltage cable in a new energy vehicle provided by an embodiment of the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle A; Figure 3 A side view of a high-voltage cable in a new energy vehicle provided by an embodiment of the present invention; Figure 4 for Figure 3 Cross-sectional view in the BB direction; Figure 5 for Figure 4 A partial enlarged view of point C in the middle; Figure 6A front view of a friction protrusion in an inner sheath of a high-voltage cable in a new energy vehicle provided by an embodiment of the present invention when the friction protrusion is in a long strip shape; Figure 7 A schematic diagram of the structure of a new energy vehicle in-vehicle high-voltage cable after the inner and outer sheaths are cut off according to an embodiment of the present invention; Figure 8 A schematic diagram of the structure of a high-voltage cable in a new energy vehicle after the outer sheath is twisted, provided by an embodiment of the present invention; Fig. 9 A front view of a new energy vehicle in which a friction protrusion in an inner sheath of a high-voltage cable provided by an embodiment of the present invention is in a block-shaped state.

[0018] In the figure: 110, conductor; 120, insulation layer; 130, shielding layer; 140, aluminum foil layer; 150, inner sheath; 151, mounting ring groove; 152, friction protrusion; 160, outer sheath; 161, connecting ring; 162, sliding ring; 170, steel wire. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] like Figures 1 to 9 As shown, an embodiment of the present invention provides a high-voltage cable for use in a new energy vehicle, which includes a conductor 110 , an insulating layer 120 , a shielding layer 130 , an aluminum foil layer 140 , an inner sheath 150 and an outer sheath 160 .

[0023] The conductor 110 is a bare copper stranded wire and has good conductivity. The insulation layer 120 is coated on the outside of the conductor 110 and is a cross-linked polyolefin. When the insulation layer 120 is coated on the outside of the conductor 110 , the insulation layer 120 can form a whole with the conductor 110 . The shielding layer 130 is a tinned copper wire, which is coated on the outside of the insulating layer 120. When the current or voltage inside the conductor 110 suddenly changes, the electromagnetic induction can be generated. The shielding layer 130 can shield part of the electromagnetic induction, thereby reducing the electromagnetic interference to the external environment; the aluminum foil layer 140 is a single-sided aluminum foil, which is coated on the outside of the shielding layer 130. The aluminum foil layer 140 has the characteristic of single-sided conductivity. The inner layer of the aluminum foil layer 140 can conduct electricity, and the outer layer of the aluminum foil layer 140 cannot conduct electricity. The aluminum foil layer 140 has the same function as the shielding layer 130. Under the joint action of the aluminum foil layer 140 and the shielding layer 130, the interference of the electromagnetic induction generated by the conductor 110 to the external environment is reduced. The inner sheath 150 is cross-linked polyolefin, and is coated on the outside of the aluminum foil layer 140 . The inner sheath 150 has an insulating function. The inner sheath 150 , the aluminum foil layer 140 , the shielding layer 130 , the insulating layer 120 and the conductor 110 form a whole.

[0024] The outer wall of the inner sleeve 150 is provided with a mounting annular groove 151, which is provided at any position of the inner sleeve 150. The outer wall of the inner sleeve 150 is provided with a plurality of friction protrusions 152, which can form a plurality of friction rings on the outer side of the inner sleeve 150, and the plurality of friction rings are arranged at intervals. In the axial direction of the inner sleeve 150, the mounting annular groove 151 and the plurality of friction rings are arranged at intervals along the axial direction of the inner sleeve 150.

[0025] The outer sheath 160 is cross-linked polyolefin, and is sleeved on the outer side of the inner sheath 150. A reinforcement is provided inside the outer sheath 160, and the reinforcement is used to prevent the total length of the outer sheath 160 from changing. Under the action of the reinforcement, when the outer sheath 160 is stretched or compressed along its own axis by external force, the overall length of the outer sheath 160 will not change. The inner side wall of the outer sheath 160 is provided with a connecting ring 161 and a sliding ring 162. The connecting ring 161 is rotatably provided in the mounting ring groove 151. Under the action of the connecting ring 161, the outer sheath 160 can rotate relative to the inner sheath 150. There are multiple sliding rings 162, each sliding ring 162 is arranged between two adjacent friction rings, and each sliding ring 162 abuts against the outer wall of the inner sleeve 150. In the specific setting, a relatively independent chamber can be formed between the two adjacent sliding rings 162, the inner wall of the outer sleeve 160 and the outer wall of the inner sleeve 150. The connecting ring 161 and the multiple sliding rings 162 are arranged at intervals along the axial direction of the outer sleeve 160, and the connecting ring 161 and the multiple sliding rings 162 are evenly arranged along the length direction of the outer sleeve 160. The outer wall area corresponding to the connecting ring 161 and the adjacent sliding ring 162 is a fixed area. Specifically, in the inner wall of the outer sheath 160, the connecting ring 161 has a sliding ring 162 adjacent to it, and there is a certain gap between the connecting ring 161 and an adjacent sliding ring 162. There is a fixed area in the outer wall of the outer sheath 160 corresponding to the area between the connecting ring 161 and an adjacent sliding ring 162 in the inner wall. The fixed area in the outer wall of the outer sheath 160 is used to connect the inner sheath 150, the aluminum foil layer 140, the shielding layer 130, the insulating layer 120 and the conductor 110 to form a whole on the new energy vehicle. When the vehicle continues to vibrate and the driving state changes continuously, the inner sheath 150, the aluminum foil layer 140, the shielding layer 130, the insulating layer 120 and the conductor The whole formed by 110 is subjected to alternating torque, and the inner sheath 150 can drive the internal structure to move synchronously. When the inner sheath 150 rotates, the inner sheath 150 drives the outer sheath 160 away from the end of the connecting ring 161 to move. Under the action of the internal reinforcement of the outer sheath 160, the outer sheath 160 is twisted, and the end of the outer sheath 160 away from the connecting ring 161 moves relative to the axis of the inner sheath 150. The distance between two adjacent sliding rings 162 on the outer sheath 160 changes, and the air pressure in the chamber formed by the two adjacent sliding rings 162, the inner wall of the outer sheath 160 and the outer wall of the inner sheath 150 increases. The increased air pressure can squeeze the outer sheath 160, reduce the force exerted by the clamp or the cable tie on the outer sheath 160 to squeeze the inner sheath 150, and thus avoid the inner sheath 150 and the internal structure from generating torque.

[0026] A high-voltage cable for use in a new energy vehicle of the present invention is provided. When preparing a high-voltage cable for use in a new energy vehicle, an insulating layer 120 is coated on the outside of a conductor 110, a shielding layer 130 is coated on the outside of the insulating layer 120, an aluminum foil layer 140 is coated on the outside of the shielding layer 130, an inner sheath 150 is coated on the outside of the aluminum foil layer 140, and an outer sheath 160 is sleeved on the outside of the inner sheath 150. When the prepared high-voltage cable is assembled on a new energy vehicle for use, a clamp or a cable tie is used to fix the outer sheath 160 on the new energy vehicle in a fixed area on the outer side wall of the outer sheath 160. Due to the continuous vibration of the vehicle and the continuous change of the driving state, the inner sheath 150, the aluminum foil layer 140, the shielding layer 130, the insulating layer 120 and the conductor 110 form a whole and are subjected to an alternating torque. The inner sheath 150 can drive the internal structure to move synchronously. By arranging a clamp on the outer side wall of the inner sheath 150, the outer sheath 160 is fixed to the new energy vehicle. A plurality of friction rings and mounting ring grooves 151 are arranged, and on the outer sleeve 160, the outer side wall area corresponding to the connecting ring 161 and the adjacent sliding ring 162 is a fixed area. When the inner sleeve 150 rotates, the inner sleeve 150 drives the outer sleeve 160 away from the end of the connecting ring 161 to move. Under the action of the internal reinforcement of the outer sleeve 160, the outer sleeve 160 is twisted, and the end of the outer sleeve 160 away from the connecting ring 161 moves relative to the axis of the inner sleeve 150. The distance between two adjacent sliding rings 162 on the outer sleeve 160 changes, and the air pressure in the chamber formed by the two adjacent sliding rings 162, the inner side wall of the outer sleeve 160 and the outer side wall of the inner sleeve 150 increases. The increased air pressure can squeeze the outer sleeve 160, reduce the force exerted by the clamp or the cable tie on the outer sleeve 160 to squeeze the inner sleeve 150, and thereby avoid the inner sleeve 150 and the internal structure from generating torque.

[0027] In one embodiment, the outer sheath 160 is configured to be annular wavy, wherein the reinforcement is disposed at the trough of the outer sheath 160, and the trough of the outer sheath 160 contacts the outer side wall of the inner sheath 150. Specifically, when the outer sheath 160 is configured to be annular wavy, and when the air pressure in the chamber formed between two adjacent sliding rings 162, the inner side wall of the outer sheath 160, and the outer side wall of the inner sheath 150 increases, the crests and troughs of the outer sheath 160 are pushed outward by the gas, thereby reducing the force exerted by the clamp or the tie on the outer sheath 160 to squeeze the inner sheath 150. Furthermore, by setting the outer sheath 160 to be annular wave-like, and the trough of the outer sheath 160 contacts the outer wall of the inner sheath 150, combined with the position of the friction protrusion 152 set on the outer wall of the inner sheath 150, it is ensured that when the inner sheath 150 and the structure inside the inner sheath 150 are subjected to alternating torque, the end of the outer sheath 160 away from the connecting ring 161 can be twisted, thereby ensuring that the air pressure of the chamber formed between two adjacent sliding rings 162, the inner wall of the outer sheath 160 and the outer wall of the inner sheath 150 can change smoothly.

[0028] In one embodiment, the reinforcement member includes a plurality of steel wires 170. When the outer sheath 160 and the inner sheath 150 are not subjected to external force impact, the length of the steel wires 170 is equal to the length of the outer sheath 160. The plurality of steel wires 170 are embedded in the outer sheath 160. The plurality of steel wires 170 are evenly distributed around the outer sheath 160. The steel wires 170 are arranged at the trough of the outer sheath 160. Specifically, by arranging the steel wires 170 at the trough of the outer sheath 160, on the one hand, the overall strength of the outer sheath 160 is ensured, and on the other hand, it is ensured that the outer sheath 160 will not be lifted by the friction protrusions 152 on the outer side wall of the inner sheath 150.

[0029] In one embodiment, the sliding ring 162 has an inner end contacting the inner sleeve 150 and an outer end connected to the outer sleeve 160, and the distance between the inner end of the sliding ring 162 and the mounting ring groove 151 is smaller than the distance between the outer end of the sliding ring 162 and the mounting ring groove 151. In other words, the sliding ring 162 is in the shape of a circumferential side wall of a truncated cone, and in the longitudinal section of the outer sleeve 160, the cross section of one side of the sliding ring 162 is in the shape of an inclined plate. The sliding ring 162 is made of a flexible material. When the end of the outer sleeve 160 away from the connecting ring 161 is twisted, the sliding ring 162 moves in the axial direction relative to the inner sleeve 150, and the air pressure in the chamber formed between the two adjacent sliding rings 162, the inner side wall of the outer sleeve 160 and the outer side wall of the inner sleeve 150 increases. According to the setting of the tilt direction of the sliding ring 162, the increased air pressure in the chamber is not easy to be dissipated from the sliding ring 162 and the inner sleeve 150. The gas in the external environment can flow through the gap between the sliding ring 162 and the inner jacket 150, thereby ensuring that there is enough gas inside the chamber formed by the two adjacent sliding rings 162, the inner wall of the outer jacket 160 and the outer wall of the inner jacket 150.

[0030] In one embodiment, the spacing between two adjacent sliding rings 162 is the same; the distance between two adjacent friction rings is the same. The purpose of setting the friction ring spacing is to prevent the friction ring from contacting the sliding ring 162. By setting the spacing between two adjacent sliding rings 162 and the distance between two adjacent friction rings, it is ensured that when the outer sheath 160 is twisted, the air pressure of the chamber formed by the two adjacent sliding rings 162, the inner wall of the outer sheath 160 and the outer wall of the inner sheath 150 can be smoothly increased.

[0031] In one embodiment, the spacing between two adjacent sliding rings 162 is the same; as the distance from the mounting ring groove 151 gradually increases, the distance between the two adjacent friction rings gradually increases. Specifically, when the outer sheath 160 is twisted, as the distance from the connecting ring 161 increases, the sliding ring 162 on the outer sheath 160 approaches the mounting ring groove 151 more. In other words, when the outer sheath 160 is twisted, the connecting ring 161 on the outer sheath 160 does not move with the inner sheath 150, and the multiple sliding rings 162 on the outer sheath 160 all move relative to the axial direction of the inner sheath 150. On the outer sheath 160, as the distance from the connecting ring 161 increases, the distance of the sliding ring 162 moving relative to the axial direction of the inner sheath 150 is superimposed. By setting the distance between the two adjacent friction rings to be larger as the distance from the mounting ring groove 151 increases, the contact between the sliding ring 162 and the friction ring is prevented.

[0032] In one embodiment, the friction protrusion 152 is in the shape of an elongated strip, the length of the friction protrusion 152 is parallel to the axial direction of the inner sleeve 150, and multiple friction protrusions 152 are arranged at intervals along the circumference of the inner sleeve 150 to form a friction ring, and the distance between two adjacent friction protrusions 152 is equal to the distance between two troughs of the outer sleeve 160. Specifically, a trough of the outer sleeve 160 is arranged between two adjacent friction protrusions 152. When the inner sleeve 150 and the internal structure are twisted, the friction protrusion 152 of the inner sleeve 150 can drive the outer sleeve 160 to have a twisting trend through the trough of the outer sleeve 160. Since the fixed area of ​​the outer sleeve 160 is fixed to the new energy vehicle by a clamp or a cable tie, that is, one end of the outer sleeve 160 with a connecting ring 161 is fixed, and the end of the outer sleeve 160 away from the connecting ring 161 can be twisted, then the outer sleeve 160 can be twisted smoothly.

[0033] In one embodiment, the friction protrusion 152 is block-shaped, and multiple friction protrusions 152 are arranged at intervals along the axial direction of the inner sleeve 150 to form a friction strip, and multiple friction strips are arranged at intervals along the circumferential direction of the inner sleeve 150 to form a friction ring, and the distance between two adjacent friction strips is equal to the distance between two wave valleys of the outer sleeve 160. Specifically, by setting the friction protrusion 152 as a block structure, after the outer sleeve 160 is twisted, the probability of the wave valley on the outer sleeve 160 being lifted by the friction protrusion 152 is reduced, thereby ensuring that the sliding ring 162 on the outer sleeve 160 maintains a state of stably contacting the outer side wall of the inner sleeve 150.

[0034] In one embodiment, there are multiple outer sheaths 160, and two adjacent outer sheaths 160 are mutually abutted, and the outer side wall of the inner sheath 150 is provided with multiple mounting ring grooves 151, and the connecting ring 161 on each outer sheath 160 is rotatably arranged in one mounting ring groove 151. Specifically, the number of outer sheaths 160 is determined by the overall length of the inner sheath 150. In the assembly process of new energy vehicles, if it is required that a high-voltage cable be fixed at intervals of 10 cm, the length of the outer sheath 160 is set to 10 cm, that is, the outer sheath 160 is fixed in the fixed area of ​​each outer sheath 160. Under the premise that the high-voltage cable is fixed by setting the outer sheath 160, when the vehicle is continuously vibrating and the driving state is constantly changing, the inner sheath 150 and the outer sheath 160 can smoothly rotate relative to each other, and at the same time, the inner sheath 150 and the internal structure are prevented from generating torque, thereby improving the service life of the high-voltage cable.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-voltage cable for new energy vehicles, characterized in that: include: conductor; Insulation layer, which covers the outside of the conductor; Shielding layer, the shielding layer is covered on the outside of the insulation layer; An aluminum foil layer, wherein the aluminum foil layer is coated on the outside of the shielding layer; An inner sheath, the inner sheath is coated on the outer side of the aluminum foil layer, an outer wall of the inner sheath is provided with a mounting ring groove, and the outer wall of the inner sheath is provided with a plurality of friction protrusions, the plurality of friction protrusions can form a plurality of friction rings on the outer side of the inner sheath, and the plurality of friction rings are distributed at intervals; An outer sheath is arranged on the outside of the inner sheath, and a reinforcement is arranged inside the outer sheath, and the reinforcement is used to prevent the total length of the outer sheath from changing; a connecting ring and a sliding ring are arranged on the inner wall of the outer sheath, and the connecting ring is rotatably arranged in the mounting ring groove; a plurality of sliding rings are arranged, each sliding ring is arranged between two adjacent friction rings, and each sliding ring abuts against the outer wall of the inner sheath; the connecting ring and the plurality of sliding rings are evenly arranged along the length direction of the outer sheath, and the outer wall area corresponding to the connecting ring and the adjacent sliding rings is a fixed area.

2. A high-voltage cable for new energy vehicles according to claim 1, characterized in that: The outer sheath is arranged in a quasi-annular wave shape, wherein the reinforcing member is arranged at the wave trough of the outer sheath, and the wave trough of the outer sheath contacts the outer side wall of the inner sheath.

3. A high-voltage cable for new energy vehicles according to claim 2, characterized in that: The reinforcement comprises a plurality of steel wires. When the outer sheath and the inner sheath are not subjected to external impact, the length of the steel wires is equal to the length of the outer sheath. The plurality of steel wires are embedded in the outer sheath, and the plurality of steel wires are evenly distributed around the outer sheath. The steel wires are arranged at the trough of the outer sheath.

4. The high-voltage cable for new energy vehicles according to claim 1, characterized in that: The sliding ring has an inner end contacting the inner sleeve and an outer end connected to the outer sleeve, and the distance between the inner end of the sliding ring and the mounting ring groove is smaller than the distance between the outer end of the sliding ring and the mounting ring groove.

5. The high-voltage cable for new energy vehicles according to claim 1, characterized in that: The distance between two adjacent sliding rings is the same; the distance between two adjacent friction rings is the same.

6. The high-voltage cable for new energy vehicles according to claim 1, characterized in that: The distance between two adjacent sliding rings is the same; as the distance gradually moves away from the mounting ring groove, the distance between two adjacent friction rings gradually increases.

7. The high-voltage cable for new energy vehicles according to claim 2, characterized in that: The friction protrusion is in the shape of a long strip, and the length of the friction protrusion is parallel to the axial direction of the inner sleeve. Multiple friction protrusions are arranged at intervals along the circumference of the inner sleeve to form a friction ring, and the distance between two adjacent friction protrusions is equal to the distance between two troughs of the outer sleeve.

8. The high-voltage cable for new energy vehicles according to claim 2, characterized in that: The friction protrusions are block-shaped, and multiple friction protrusions are arranged to form a friction strip along the axial direction of the inner sleeve, and multiple friction strips are arranged to form a friction ring along the circumferential direction of the inner sleeve. The distance between two adjacent friction strips is equal to the distance between two troughs of the outer sleeve.

9. The high-voltage cable for new energy vehicles according to claim 1, characterized in that: There are multiple outer sheaths, and two adjacent outer sheaths are in contact with each other. The outer side wall of the inner sheath is provided with multiple mounting ring grooves, and each connecting ring on the outer sheath is rotatably arranged in a mounting ring groove.

10. The high-voltage cable for new energy vehicles according to claim 1, characterized in that: The insulating layer is cross-linked polyolefin; the shielding layer is tinned copper wire; the aluminum foil layer is single-sided aluminum foil; the inner sheath is cross-linked polyolefin; and the outer sheath is cross-linked polyolefin.

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