A vehicle retractable cord for high voltage and high current charging

Abstract

This application provides a vehicle retractable charging cable for high-voltage, high-current charging, connected between a first vehicle body and a second vehicle body. It includes an elastic conduit assembly with at least one receiving channel and multiple elastically deformable sections, and a charging cable assembly disposed within the receiving channel. The portion of the charging cable assembly located in the corresponding area of ​​the elastically deformable sections is continuously bent and extends to form a retractable section, with its outer circumferential surface of insulation layer radially spaced from the inner circumferential surface of the receiving channel. This vehicle retractable cable can achieve smooth and controllable extension and retraction when the two vehicle bodies are in relative displacement, reducing cable pulling, bending, and wear, and improving the safety and service life of the charging connection.

Description

Technical Field

[0001] This application relates to the field of high-voltage current transmission, and more particularly to a retractable cable for high-voltage, high-current charging of vehicles. Background Technology

[0002] In some applications requiring cross-vehicle power transmission, such as between a first vehicle body and a second vehicle body with relative positional changes (e.g., a tractor and a trailer), charging cables are often required to achieve stable transmission of high voltage and high current. Because the two vehicle bodies experience relative displacement such as turning, swaying, approaching or moving away, the connecting cables must not only meet conductivity requirements but also adapt to repeated changes in length and orientation, while also considering responsive extension and retraction, mechanical protection, and long-term reliability.

[0003] In existing technologies, flexible cables are typically laid directly, sheathed, or coiled / spiraled to accommodate expansion and contraction. However, in high-voltage, high-current charging scenarios, the cables are thicker and heavier, relying directly on the cable body to bear the tension and bending, which easily leads to localized stress concentration and friction, compression, and fatigue damage during repeated operation. Simultaneously, the cable and the inner wall of the sheath are often tightly fitted, lacking effective heat dissipation gaps, resulting in heat accumulation and accelerated insulation aging. These structural defects make charging cables prone to insulation wear, decreased insulation performance, and even conductor damage during long-term use, seriously affecting charging stability and safety.

[0004] Therefore, there is a need for a vehicle telescopic cable that connects the first vehicle body and the second vehicle body, can achieve stable extension and retraction when the two are in relative displacement, and reduces the risk of the charging cable being directly pulled, squeezed and worn. Summary of the Invention

[0005] In view of this, it is necessary to provide a vehicle retractable cable for high-voltage, high-current charging to solve the above problems.

[0006] Embodiments of this application provide a vehicle retractable cable for high-voltage, high-current charging, connected between a first vehicle body and a second vehicle body, comprising: The flexible pipeline assembly forms at least one receiving channel extending through both ends along its extension direction, and has a plurality of spaced-apart flexible deformable segments along its extension direction. A charging cable assembly, disposed within the at least one receiving channel, includes a first circuit conductor, a second circuit conductor, and an insulating layer respectively covering the outside of the first circuit conductor and the second circuit conductor, wherein the outer peripheral surface of the insulating layer and the inner peripheral surface of the receiving channel are radially spaced apart. The charging cable assembly is continuously bent and extended in the region corresponding to the elastic deformation section to form a telescopic part. The two ends of the charging cable assembly extend out of the elastic pipeline assembly to form a front charging connection part and a rear charging connection part that are respectively connected to the first vehicle body and the second vehicle body.

[0007] In at least one embodiment of this application, the elastic deformation segment is a plurality of annular corrugated segments spaced apart along the extension direction of the elastic pipeline assembly.

[0008] In at least one embodiment of this application, the outer periphery of the annular corrugated segment is provided with a plurality of annular protrusions spaced apart along the extension direction of the elastic pipeline assembly, and an annular recess is formed between two adjacent annular protrusions.

[0009] In at least one embodiment of this application, the elastic deformation segment is spirally extended along the extension direction of the elastic conduit assembly, and the elastic conduit assembly is in the shape of a spring wire.

[0010] In at least one embodiment of this application, the resilient conduit assembly includes a single resilient tube that forms one of the receiving channels.

[0011] In at least one embodiment of this application, the elastic conduit assembly includes two elastic tubes arranged in a side-by-side direction, each of the two elastic tubes forming a receiving channel.

[0012] In at least one embodiment of this application, the charging cable assembly includes two charging cables, which are respectively disposed in two independent receiving channels.

[0013] In at least one embodiment of this application, the first circuit conductor is disposed in one of the independent receiving channels, and the second circuit conductor is disposed in another of the independent receiving channels.

[0014] In at least one embodiment of this application, the elastic conduit assembly includes a plurality of elastic tubes arranged in a parallel direction, each of the elastic tubes forming an independent receiving channel, and the charging cable assembly includes at least two charging cables, each of the at least two charging cables being disposed in different independent receiving channels.

[0015] In at least one embodiment of this application, the flexible tubing assembly is made of at least one material selected from TPU, TPV, TPEE, TPAE, PA11, PA12, or POM.

[0016] The aforementioned retractable charging cable for high-voltage, high-current vehicle charging utilizes an elastic conduit assembly with multiple elastic deformation sections externally mounted on the charging cable assembly for high-voltage, high-current charging. This elastic conduit assembly first absorbs and guides the overall expansion and contraction. Simultaneously, the charging cable assembly is positioned within a receiving channel, forming a continuously bending and extending expansion section in the corresponding elastic deformation section area. A radial gap is maintained between the cable insulation layer and the inner wall of the receiving channel, providing necessary clearance and buffer space for the cable during expansion and contraction. When the first and second vehicle bodies approach, move away from each other, or change posture, the charging cable can expand and contract smoothly and controllably, effectively reducing problems such as excessive localized tension, excessive bending, and compression wear in existing technologies, as well as the resulting insulation failure and reduced service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a vehicle retractable charging cable for high-voltage, high-current charging according to an embodiment of this application. Figure 2 This is a schematic diagram of the flexible pipeline assembly in Example 1; Figure 3 This is a schematic diagram of the structure of two flexible pipeline assemblies; Figure 4 This is a schematic diagram of a multi-elastic pipeline assembly. Figure 5 This is a schematic diagram of the flexible pipeline assembly in Example 2; Figure 6 This is a cross-sectional schematic diagram of the flexible pipeline assembly in Embodiment 1; Figure 7 This is a cross-sectional schematic diagram of the flexible pipeline assembly in another embodiment.

[0018] Explanation of main component symbols 100. A vehicle retractable charging cable for high-voltage, high-current charging; 10. First vehicle body; 20. Second vehicle body; 30. Elastic cable assembly; 31. Receiving channel; 32. Elastic deformation section; 33. Annular corrugated section; 331. Annular protrusion; 332. Annular recess; 34. Elastic tube; 40. Charging cable assembly; 41. First circuit conductor; 42. Second circuit conductor; 43. Insulation layer; 45. Retractable part; 46. Front-end charging connection part; 47. Rear-end charging connection part; 48. Charging cable body. Detailed Implementation

[0019] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0020] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0021] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] according to Figures 1-7 This application provides a vehicle retractable cable 100 for high-voltage, high-current charging, which is connected between the first vehicle body 10 and the second vehicle body 20.

[0023] Specifically, the first vehicle body 10 and the second vehicle body 20 are two vehicle body structures with a relative displacement relationship. Under conditions such as vehicle driving, turning, reversing, engaging, disengaging, or road surface undulations, the distance and relative posture between the two will change, causing the charging connection structure set between them to be continuously subjected to stretching, retraction, swinging, and bending. Based on this, the vehicle telescopic cable in this embodiment is set between the first vehicle body 10 and the second vehicle body 20 to realize the cross-vehicle transmission of high voltage and high current, and to maintain reliable mechanical adaptability and stable electrical connection state when the two vehicle bodies undergo relative displacement.

[0024] Specifically, the vehicle retractable cable in this embodiment includes an elastic cable assembly 30 and a charging cable assembly 40. The elastic cable assembly 30 extends along its extension direction to form at least one receiving channel 31, with both ends of the receiving channel 31 facing the first vehicle body 10 and the second vehicle body 20, respectively, so that the charging cable assembly 40 passes through the interior of the elastic cable assembly 30.

[0025] Furthermore, the elastic pipeline assembly 30 is provided with multiple spaced elastic deformation segments 32 along its extension direction, and the elastic pipeline assembly 30 is provided with multiple regions capable of elastic deformation in the length direction. This allows each elastic deformation segment 32 to extend and deform sequentially or simultaneously when the relative distance between the first vehicle body 10 and the second vehicle body 20 increases; and each elastic deformation segment 32 to retract and reset when the relative distance between the first vehicle body 10 and the second vehicle body 20 decreases. By spaced out the multiple elastic deformation segments 32 along the length direction, the length changes of the entire telescopic line during use can be distributed to multiple different areas, allowing the deformation to be released uniformly along the length direction.

[0026] Furthermore, the charging cable assembly 40 is disposed within the receiving channel 31. The charging cable assembly 40 includes a first circuit conductor 41, a second circuit conductor 42, and insulating layers 43 respectively covering the exterior of the first circuit conductor 41 and the second circuit conductor 42. The first circuit conductor 41 and the second circuit conductor 42 respectively constitute the conductive paths in the high-voltage, high-current transmission circuit, and the insulating layer 43 provides electrical insulation and isolation to the conductors, thus providing external protection for the internal conductors. It should be noted that in this embodiment, the outer peripheral surface of the insulating layer 44 is radially spaced from the inner peripheral surface of the receiving channel 31, that is, a certain radial gap is formed between the charging cable assembly 40 and the inner wall of the elastic conduit assembly 30. This radial gap provides space for the relative displacement and posture changes of the charging cable assembly 40 within the receiving channel 31, and also maintains a buffered fit between the charging cable assembly 40 and the inner wall of the receiving channel 31.

[0027] Furthermore, the portion of the charging cable assembly 40 located in the region corresponding to the elastic deformation section 32 is continuously bent and extends to form a telescopic section 45. Within the internal region corresponding to each elastic deformation section 32 of the elastic cable assembly 30, the charging cable assembly 40 extends in a continuously bent manner, thereby forming a deployable and retractable telescopic section 45 in that region. This allows the elastic deformation section 32 of the elastic cable assembly 30 to extend axially when the first vehicle body 10 and the second vehicle body 20 move away from each other, and the telescopic section 45 in the corresponding region gradually unfolds, releasing the length reserve of the charging cable assembly 40. When the first vehicle body 10 and the second vehicle body 20 move closer together again, the telescopic section 45 in the corresponding region can bend back and return to a continuously bent state to absorb excess length. Thus, the charging cable assembly 40 achieves controlled deployment and controlled retraction throughout the entire extension and retraction process through preset continuously bent sections.

[0028] Furthermore, the two ends of the charging cable assembly 40 extend out of the elastic conduit assembly 30, forming a front-end charging connection 46 and a rear-end charging connection 47 at each end. The front-end charging connection 46 is connected to the first vehicle body 10, and the rear-end charging connection 47 is connected to the second vehicle body 20. Thus, charging current can flow from one vehicle body through the front-end charging connection 46 into the charging cable assembly 40, then through the charging cable assembly 40 to the rear-end charging connection 47 and into the other vehicle body, thereby completing a high-voltage, high-current connection across vehicle bodies. Simultaneously, the elastic conduit assembly 30 is located between the two charging connections, externally covering and guiding the expansion and contraction of the intermediate transmission section, ensuring clear connection positions at both ends and forming a stable force path in the intermediate expansion and contraction area.

[0029] It should be noted that, in at least one embodiment of this application, high-voltage high-current charging corresponds to a high-power cross-vehicle power supply condition. The charging cable assembly 40 is used to transmit high-power electrical energy between the first vehicle body 10 and the second vehicle body 20. Under this condition, the charging cable assembly 40 can transmit a current of 100A-1000A and an operating voltage of 600V-2000V. The cross-sectional area of ​​each circuit conductor in the charging cable assembly 40 is 16mm²-240mm² to meet the cross-vehicle power supply requirements under high voltage, high current and large cross-section conductor conditions.

[0030] In at least one embodiment of this application, the elastic deformation segment 32 is a plurality of annular corrugated segments 33 spaced apart along the extension direction of the elastic pipeline assembly 30.

[0031] Specifically, each annular corrugated segment 33 is arranged circumferentially around the elastic pipeline assembly 30 and sequentially along the length of the elastic pipeline assembly 30, thereby forming a corrugated structure capable of elastic deformation at multiple locations on the elastic pipeline assembly 30. When the distance between the first vehicle body 10 and the second vehicle body 20 changes, each annular corrugated segment 33 can axially extend or retract along the extension direction of the elastic pipeline assembly 30 to absorb the overall length change of the vehicle's telescopic line; at the same time, since each annular corrugated segment 33 is a continuous annular structure arranged circumferentially, when the elastic pipeline assembly 30 is subjected to bending, swaying, or torsion, each annular corrugated segment 33 can form a relatively balanced deformation response in the circumferential direction, so that the elastic pipeline assembly 30 has good follow-up deformation capability under different force directions.

[0032] Furthermore, after multiple annular corrugated segments 33 are distributed at intervals along the extension direction, the deformation of the entire vehicle telescopic line can be dispersed and released to multiple corrugated areas, thereby forming a continuous and coordinated telescopic response relationship between adjacent areas, causing the telescopic part 45 of the charging cable assembly 40 located in the corresponding area to change synchronously with the extension and retraction of the annular corrugated segments 33.

[0033] In summary, this embodiment enables the vehicle retractable cable to form a more stable axial expansion and contraction capability and circumferential force adaptability when the first vehicle body 10 and the second vehicle body 20 are relatively displaced. This is beneficial to improving the external guiding effect of the elastic cable assembly 30 on the charging cable assembly 40, so that the charging cable assembly 40 maintains a more stable force state during repeated use, thereby improving the mechanical reliability, connection stability and long service life of the entire vehicle retractable cable.

[0034] In at least one embodiment of this application, the outer periphery of the annular corrugated segment 33 is provided with a plurality of annular protrusions 331 spaced apart along the extension direction of the elastic pipeline assembly 30, and an annular recess 332 is formed between two adjacent annular protrusions 331.

[0035] Specifically, each annular protrusion 331 is continuously arranged around the circumference of the elastic conduit assembly 30 and sequentially arranged along the length of the elastic conduit assembly 30, thereby forming a corrugated shape with alternating protrusions and recesses on the outer surface of the elastic conduit assembly 30. Annular recesses 332 between adjacent annular protrusions 331 extend continuously in the circumference, and each annular recess 332 is located between adjacent annular protrusions 331 in the length direction, thereby forming multiple corrugated unit structures spaced apart along the extension direction on the outer periphery of the elastic conduit assembly 30.

[0036] Furthermore, with the annular protrusions 331 and annular recesses 332 alternately arranged along the extension direction of the elastic pipeline assembly 30, the elastic pipeline assembly 30 can generate continuous elastic deformation response at multiple corrugated units when subjected to axial force. When the distance between the first vehicle body 10 and the second vehicle body 20 increases, the corresponding area of ​​each annular recess 332 can expand and change with the overall stress state of the elastic pipeline assembly 30, and the distance between adjacent annular protrusions 331 increases accordingly, thereby causing the elastic pipeline assembly 30 to elongate along the extension direction as a whole; when the distance between the first vehicle body 10 and the second vehicle body 20 decreases, the corresponding area of ​​each annular recess 332 can shrink and change, and the distance between adjacent annular protrusions 331 decreases accordingly, thereby causing the elastic pipeline assembly 30 to shorten along the extension direction as a whole. Thus, the expansion and contraction of the elastic pipeline assembly 30 in the length direction can be distributed and released in the corrugated area formed by the cooperation of multiple annular protrusions 331 and annular recesses 332.

[0037] Furthermore, since each annular protrusion 331 is continuously arranged circumferentially, and each annular recess 332 also extends continuously circumferentially, the elastic cable assembly 30 can form a relatively balanced deformation response at its outer periphery when subjected to swaying, bending, or localized eccentric loading. Thus, the elastic cable assembly 30 can maintain stable corrugated deformation characteristics under stress in different directions, ensuring that the entire vehicle telescopic cable maintains a continuous and smooth telescopic state when the two vehicle bodies turn, sway, or the road surface undulations cause attitude changes. Simultaneously, the telescopic portion 45 of the charging cable assembly 40 located inside the elastic cable assembly 30 in the corresponding area can also adjust its shape synchronously with the expansion and contraction of each corrugated area, thereby coordinating the length compensation process of the internal charging cable assembly 40 with the deformation process of the external elastic cable assembly 30.

[0038] Furthermore, with multiple annular protrusions 331 and annular recesses 332 spaced apart along the extension direction, the outer surface of the elastic cable assembly 30 forms a regularly undulating contour structure. This structure, on the one hand, gives the elastic cable assembly 30 a clearly defined elastic deformation area, with each corrugated area maintaining good deformation consistency during repeated expansion and contraction; on the other hand, the alternating arrangement of the annular protrusions 331 and annular recesses 332 increases the outer peripheral surface area of ​​the elastic cable assembly 30, thereby creating more sufficient contact conditions between the outer surface of the elastic cable assembly 30 and the surrounding environment, which is beneficial for maintaining good heat dissipation of the entire vehicle retractable cable under high-voltage, high-current transmission conditions. Combined with the radially spaced structure between the charging cable assembly 40 and the receiving channel 31, the corrugated structure of the outer periphery of the elastic cable assembly 30 can further improve the overall performance of the entire vehicle retractable cable in terms of mechanical adaptability and heat exchange conditions.

[0039] In at least one embodiment of this application, the elastic deformation segment 32 is spirally extended along the extension direction of the elastic conduit assembly 30, and the elastic conduit assembly 30 is in the shape of a spring wire.

[0040] Specifically, the elastic pipeline assembly 30 is formed as a continuous helical winding structure around its extension direction, giving the elastic pipeline assembly 30 multiple sequentially arranged helical segments in the length direction. These helical segments together constitute a spring-like linear shape that can extend and retract axially. Thus, when the elastic pipeline assembly 30 is installed between the first vehicle body 10 and the second vehicle body 20, it can respond to changes in the distance and attitude between the two vehicle bodies by utilizing the elastic deformation capability of the helical structure itself.

[0041] Furthermore, after the elastic deformation segment 32 is spirally extended along the extension direction of the elastic pipeline assembly 30, each spiral segment forms a continuously distributed elastic deformation region along the length of the elastic pipeline assembly 30. When the first vehicle body 10 and the second vehicle body 20 move away from each other, the distance between adjacent spiral segments increases, causing the elastic pipeline assembly 30 to elongate as a whole along the extension direction; when the first vehicle body 10 and the second vehicle body 20 move closer to each other, the distance between adjacent spiral segments decreases, causing the elastic pipeline assembly 30 to retract as a whole along the extension direction. Through this spiral extension structure, the vehicle telescopic cable can form a continuous and gentle expansion and contraction path during use, allowing the length compensation process to be gradually released along multiple spiral segments.

[0042] Furthermore, after the elastic cable assembly 30 is shaped like a spring wire, in addition to adapting to axial expansion and contraction, it can also flexibly adapt to lateral displacement and attitude changes generated under steering, swaying, and vibration conditions. When a relative sway angle or local deflection occurs between the first vehicle body 10 and the second vehicle body 20, the spring wire-shaped elastic cable assembly 30 can absorb part of the bending displacement through the spatial deformation of each spiral segment, so that the entire vehicle telescopic cable maintains good follow-up performance under force conditions in different directions. At the same time, the charging cable assembly 40 located in the corresponding telescopic part 45 inside the elastic cable assembly 30 can also expand or bend back synchronously with the extension and retraction of the spiral structure, so that the length compensation process of the internal charging cable assembly 40 is coordinated with the elastic deformation process of the external elastic cable assembly 30.

[0043] Furthermore, by adopting a spring-like linear structure, the elastic cable assembly 30 exhibits excellent recovery characteristics during its overall telescopic movement. After the external force decreases or the external displacement recovers, each spiral segment can gradually return to its initial arrangement state based on the elastic recovery capability of the material itself, allowing the elastic cable assembly 30 to maintain a relatively compact layout. In this way, the vehicle telescopic cable can maintain a good retracted state under non-stretching conditions, thus keeping the connection area between the first vehicle body 10 and the second vehicle body 20 neat and reducing the risk of dragging and swaying of the connecting cable in its natural drooping state.

[0044] In at least one embodiment of this application, the resilient conduit assembly 30 includes a single resilient tube 34 that forms one of the receiving channels 31.

[0045] Specifically, the flexible conduit assembly 30 is composed of a single, continuously arranged flexible tube 34. This single flexible tube 34 forms an internal space extending through both ends along its extension direction. This internal space constitutes a receiving channel 31 for accommodating the charging cable assembly 40. The charging cable assembly 40 can pass through the interior of the single flexible tube 34 along the length of the receiving channel 31, and its shape changes synchronously with the overall expansion and contraction of the single flexible tube 34.

[0046] Furthermore, after the single elastic tube 34 forms a receiving channel 31, the first circuit conductor 41 and the second circuit conductor 42 can be jointly arranged within the same receiving channel 31 and protected by the insulation layer 43 of the charging cable assembly 40. The portion of the charging cable assembly 40 located in the region corresponding to the elastic deformation section 32 has a continuously curved and extended structure. The charging cable assembly 40 can form a telescopic portion 45 inside the single elastic tube 34 that corresponds to the external elastic deformation section 32, thereby creating a corresponding and matching relationship between the external elastic deformation of the single elastic tube 34 and the length compensation process of the internal charging cable assembly 40.

[0047] When the distance between the first vehicle body 10 and the second vehicle body 20 increases, the single elastic tube 34 extends along the extension direction, and the telescopic part 45 of the charging cable assembly 40 located inside it unfolds accordingly; when the distance between the first vehicle body 10 and the second vehicle body 20 decreases, the single elastic tube 34 retracts along the extension direction, and the telescopic part 45 of the charging cable assembly 40 located inside it bends back to its original position.

[0048] In at least one embodiment of this application, the elastic conduit assembly 30 includes two elastic tubes 34 arranged in a side-by-side direction, and the two elastic tubes 34 respectively form receiving channels 31; the charging cable assembly 40 includes two charging cables 48, and the two charging cables 48 are respectively disposed in two independent receiving channels 31.

[0049] Specifically, in this embodiment, the elastic cable assembly 30 consists of two elastic tubes 34 arranged in a parallel direction, extending together between the first vehicle body 10 and the second vehicle body 20, thereby forming a dual-channel structure outside the vehicle telescopic cable. Each elastic tube 34 has an independent receiving channel 31 extending along its extension direction, each receiving channel 31 accommodating a corresponding charging cable 48. Thus, the two charging cables 48 are structurally arranged in separate channels, each located inside one of the two independent elastic tubes 34.

[0050] Furthermore, the two elastic tubes 34 can be arranged along the same extension path and maintain a corresponding mating relationship in the length direction, so that the two elastic tubes 34 can extend or retract synchronously when relative displacement occurs between the first vehicle body 10 and the second vehicle body 20. The two charging cables 48 arranged in the two independent receiving channels 31 also undergo length compensation changes according to the deformation process of the corresponding elastic tubes 34.

[0051] When the first vehicle body 10 and the second vehicle body 20 move away from each other, the two elastic tubes 34 extend along their respective extension directions, and the two charging cables 48, located in their respective receiving channels 31, simultaneously unfold in their corresponding areas. When the first vehicle body 10 and the second vehicle body 20 move closer to each other, the two elastic tubes 34 retract along their respective extension directions, and the two charging cables 48 simultaneously bend back to their original positions within their respective receiving channels 31. In this way, during the overall extension and retraction of the vehicle's telescopic cable, a cooperative relationship is formed in which the external double elastic tubes 34 deform synchronously, and the internal double charging cables 48 compensate separately.

[0052] Furthermore, since the two charging cables 48 are located in two independent receiving channels 31, each charging cable 48 has its own independent movement space and independent protection path. Each charging cable 48 maintains a relatively stable arrangement within its respective receiving channel 31 and is externally covered and guided by its corresponding elastic tube 34. Each charging cable 48 can form a corresponding buffer space and heat dissipation space within its respective receiving channel 31, thus ensuring that both charging cables 48 maintain good movement margin and stress state during repeated extension and retraction.

[0053] Furthermore, with the two elastic tubes 34 arranged side-by-side, the entire vehicle telescopic cable presents a double-line parallel layout. This structure helps to clarify the layout paths of the two charging cables 48 and maintain a clear elastic deformation path for each. When the first vehicle body 10 and the second vehicle body 20 swing, turn, or deflect relative to each other, the two elastic tubes 34 can provide continuous support and external restraint for their respective internal charging cables 48, thereby ensuring that both charging cables 48 maintain good adaptability and mechanical protection under complex working conditions. Simultaneously, the dual-channel structure also facilitates the separate assembly, maintenance, or replacement of the two charging cables 48 according to different electrical connection requirements, improving ease of implementation during use.

[0054] In at least one embodiment of this application, the first circuit conductor 41 is disposed in one of the independent receiving channels 31, and the second circuit conductor 42 is disposed in another of the independent receiving channels 31.

[0055] Specifically, based on the dual elastic tube 34, dual receiving channels 31, and dual charging lines 48, the charging line 48 containing the first circuit conductor 41 is disposed in one independent receiving channel 31, and the charging line 48 containing the second circuit conductor 42 is disposed in another independent receiving channel 31. This allows the two conductor paths that originally constituted the charging circuit to extend along different independent channels. Thus, the first circuit conductor 41 and the second circuit conductor 42 are spatially separated, with their respective insulating layers 43 covering the outside of the conductors and being respectively covered and elastically guided by the corresponding elastic tube 34.

[0056] Furthermore, with the first circuit conductor 41 and the second circuit conductor 42 located in two independent receiving channels 31, the two conductive paths form independent layout paths within the vehicle telescopic cable. When the first vehicle body 10 and the second vehicle body 20 approach, move away, swing, or turn, the charging cable 48 carrying the first circuit conductor 41 can complete its unfolding and bending changes within its corresponding independent receiving channel 31, and the charging cable 48 carrying the second circuit conductor 42 can also complete its corresponding unfolding and bending changes within the other independent receiving channel 31. Since the two circuit conductors correspond to independent elastic tubes 34 and independent receiving channels 31, the activity space, force transmission path, and deformation compensation path of the two conductive paths maintain a clear correspondence during the telescopic process, thereby enabling the entire vehicle telescopic cable to form a more orderly structural response under repeated operating conditions.

[0057] Furthermore, after the first circuit conductor 41 and the second circuit conductor 42 are respectively disposed in different independent receiving channels 31, corresponding buffer spaces and heat dissipation spaces can be formed around each of them. The structure in which the outer peripheral surface of the insulating layer 43 and the inner peripheral surface of the receiving channel 31 are radially spaced apart creates an independent margin of movement between the charging line 48 containing the first circuit conductor 41 and its corresponding receiving channel 31, and also an independent margin of movement between the charging line 48 containing the second circuit conductor 42 and the other receiving channel 31. Thus, during high-voltage, high-current transmission, the two conductive paths can maintain good mechanical buffering and heat exchange conditions, which is beneficial for maintaining a stable working environment for their respective insulating layers 43.

[0058] Furthermore, by adopting a separate channel layout for the first circuit conductor 41 and the second circuit conductor 42, the assembly relationship between the corresponding circuit conductors becomes clearer. First, the charging cable 48 carrying the first circuit conductor 41 can be threaded into one independent receiving channel 31, and then the charging cable 48 carrying the second circuit conductor 42 can be threaded into another independent receiving channel 31. The portions of the two charging cables 48 located in the corresponding areas of their respective elastic deformation sections 32 form continuously bending and extending telescopic portions 45. Then, the corresponding ends of the two charging cables 48 are connected to the corresponding electrical connection positions on the first vehicle body 10 and the second vehicle body 20, respectively. Through this arrangement, the first circuit conductor 41 and the second circuit conductor 42 form a one-to-one correspondence with a clear path, making their independent layout beneficial for the assembly and subsequent maintenance of the entire vehicle telescopic cable.

[0059] In at least one embodiment of this application, the flexible conduit assembly 30 includes a plurality of flexible tubes 34 arranged in a parallel direction, each flexible tube 34 forming an independent receiving channel 31, and the charging cable assembly 40 includes at least two charging cables 48, each of which is disposed in a different independent receiving channel 31.

[0060] Specifically, in another embodiment of this application, the elastic cable assembly 30 includes three elastic tubes 34 arranged in a parallel direction, extending together between the first vehicle body 10 and the second vehicle body 20, thereby forming a multi-channel parallel structure outside the vehicle telescopic cable. Each elastic tube 34 has an independent receiving channel 31 extending through both ends along its extension direction, and each independent receiving channel 31 is used to receive a corresponding charging cable 48. Thus, the multiple charging cables 48 are arranged in a channeled manner in the overall structure, with each charging cable 48 located inside a different elastic tube 34 and respectively covered and elastically guided by the corresponding elastic tube 34.

[0061] Furthermore, after multiple elastic tubes 34 are arranged in a parallel direction, each elastic tube 34 can extend between the first vehicle body 10 and the second vehicle body 20 along the same overall layout direction, forming a synchronous cooperation relationship in the length direction. When the distance between the first vehicle body 10 and the second vehicle body 20 changes, the multiple elastic tubes 34 can jointly extend or retract to disperse and absorb the overall length change of the vehicle telescopic cable. Correspondingly, at least two charging cables 48 arranged in different independent receiving channels 31 also undergo length compensation changes according to the deformation process of the corresponding elastic tubes 34. In this way, the multiple external elastic tubes 34 form a multi-path elastic support structure, and the at least two internal charging cables 48 form a corresponding multi-path conductive structure, thereby enabling the entire vehicle telescopic cable to maintain good overall coordination during use.

[0062] Furthermore, with at least two charging cables 48 each housed in different independent receiving channels 31, each charging cable 48 has its own independent operating space and independent protection path. Each charging cable 48 can form a telescopic section 45 corresponding to the elastic deformation section 32 within its corresponding independent receiving channel 31. When the first vehicle body 10 and the second vehicle body 20 move away from each other, approach each other, swing, or turn, they unfold and bend within their respective receiving channels 31. This allows the length compensation action of each charging cable 48 to be performed separately in different independent channels, maintaining a clear and orderly arrangement of multiple charging cables 48 during repeated extension and retraction, and ensuring that each charging cable 48 maintains a good stress state within its corresponding channel.

[0063] Furthermore, after the multiple elastic tubes 34 each form an independent receiving channel 31, a corresponding radial gap can be formed between each charging cable 48 and the inner circumferential surface of the corresponding receiving channel 31. This radial gap allows each charging cable 48 to have sufficient movement and buffering capacity within its respective independent receiving channel 31, while also creating corresponding heat dissipation space around each charging cable 48. Since at least two charging cables 48 are located in different channels, the mechanical movement path and heat exchange space of each charging cable 48 are independent of each other, which is beneficial for the multiple charging cables 48 to maintain a stable structural and operational state under high voltage and high current operating conditions.

[0064] Furthermore, with multiple flexible tubes 34 arranged in a parallel direction, the number of charging cables 48 in the vehicle retractable cable can be flexibly configured according to actual power supply needs. In specific implementation, the corresponding number of charging cables 48 can be set in multiple independent accommodating channels 31 according to the number of high-voltage power supply circuits, current transmission requirements, or auxiliary circuit configuration requirements between different vehicles. In this way, while maintaining a unified external structure, the entire vehicle retractable cable can achieve multi-circuit and multi-path expansion deployment, thereby improving the adaptability of the structure to different application scenarios.

[0065] In at least one embodiment of this application, the flexible tubing assembly 30 is made of at least one material selected from TPU, TPV, TPEE, TPAE, PA11, PA12 or POM.

[0066] Specifically, the flexible conduit assembly 30 can be made from a single material among the aforementioned materials, or it can be made from two or more materials in combination, depending on the operating conditions, extension stroke, bending frequency, ambient temperature, and high-voltage, high-current transmission conditions of the vehicle's telescopic cable. Through this material configuration, the flexible conduit assembly 30, while forming the accommodating channel 31 and the elastic deformation section 32, possesses flexibility, resilience, mechanical strength, and environmental tolerance suitable for the cross-vehicle telescopic connection conditions.

[0067] Furthermore, when the elastic pipeline assembly 30 is made of TPU, TPV, TPEE or TPAE material, the elastic pipeline assembly 30 as a whole has good elastic recovery performance and repeated bending adaptability, so that the elastic deformation section 32 can maintain a continuous and smooth expansion and contraction response state when the first vehicle body 10 and the second vehicle body 20 approach each other, move away from each other, swing or turn.

[0068] When PA11, PA12, or POM materials are selected for the flexible conduit assembly 30, the flexible conduit assembly 30 as a whole has good structural stability, wear resistance, and dimensional retention, thereby ensuring that the receiving channel 31 and the elastic deformation section 32 maintain a good molding and service condition during long-term use. Based on this, the above materials enable the flexible conduit assembly 30 to maintain a stable tube shape and elastic function under the combined effects of external mechanical deformation, internal cable movement, and environmental changes.

[0069] Furthermore, since the vehicle retractable cable is suitable for high-voltage, high-current charging scenarios, the charging cable assembly 40 is characterized by a large wire diameter, high weight, and high heat generation during operation. Therefore, the material of the flexible cable assembly 30 not only needs to meet the requirements of external expansion and contraction but also needs to provide continuous and stable external coverage and support for the internal charging cable assembly 40. By making the flexible cable assembly 30 from at least one of the aforementioned materials, the flexible cable assembly 30 can maintain good flexibility and deformation capacity during repeated expansion and contraction, and maintain a relatively stable support state for the inner wall of the receiving channel 31. This allows the charging cable assembly 40 to obtain good external guidance and buffering conditions within the receiving channel 31. At the same time, the aforementioned materials also enable the flexible cable assembly 30 to maintain good surface condition and structural integrity under conditions of friction, vibration, oscillation, and changes in the external environment.

[0070] Furthermore, in some embodiments, the elastic tubing assembly 30 can be formed by extrusion molding, injection molding, or other methods suitable for preparing the elastic tube body 34, so that the elastic tubing assembly 30 integrally forms the receiving channel 31, the elastic deformation section 32, and the corresponding external contour structure. In this way, the elastic tubing assembly 30 forms a stable matching relationship between material properties and structural morphology, so that each elastic deformation section 32 maintains good recovery ability during repeated extension and retraction, and the entire elastic tubing assembly 30 maintains continuous and stable expansion and contraction performance during long-term use.

[0071] Therefore, the aforementioned vehicle retractable charging cable 100 for high-voltage, high-current charging utilizes an elastic conduit assembly 30 with multiple elastic deformation sections 32 externally disposed on the charging cable assembly 40 for high-voltage, high-current charging. The elastic conduit assembly 30 first absorbs and guides the overall expansion and contraction. Simultaneously, the charging cable assembly 40 is positioned within a receiving channel 31, forming a continuously bending and extending expansion section 45 in the area corresponding to the elastic deformation section 32. A radial gap is maintained between the cable insulation layer 43 and the inner wall of the receiving channel 31, thus providing necessary clearance and buffer space for the cable during expansion and contraction. When the first vehicle body 10 and the second vehicle body 20 approach, move away, or change posture, the charging cable 48 can expand and contract in a relatively smooth and controllable manner, effectively reducing problems such as excessive localized pulling, excessive bending, and compression wear of the cable in the prior art, as well as the resulting insulation failure and reduced service life.

[0072] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A retractable charging cable for high-voltage, high-current vehicle charging, connected between a first vehicle body and a second vehicle body, characterized in that, include: The flexible pipeline assembly forms at least one receiving channel extending through both ends along its extension direction, and has a plurality of spaced-apart flexible deformable segments along its extension direction. A charging cable assembly, disposed within the at least one receiving channel, includes a first circuit conductor, a second circuit conductor, and an insulating layer respectively covering the outside of the first circuit conductor and the second circuit conductor, wherein the outer peripheral surface of the insulating layer and the inner peripheral surface of the receiving channel are radially spaced apart. The charging cable assembly is continuously bent and extended in the region corresponding to the elastic deformation section to form a telescopic part. The two ends of the charging cable assembly extend out of the elastic pipeline assembly to form a front charging connection part and a rear charging connection part that are respectively connected to the first vehicle body and the second vehicle body.

2. The vehicle retractable charging cable for high-voltage, high-current charging according to claim 1, characterized in that, The elastic deformation segment is a plurality of annular corrugated segments spaced apart along the extension direction of the elastic pipeline assembly.

3. A vehicle retractable charging cable for high-voltage, high-current charging according to claim 2, characterized in that, The outer periphery of the annular corrugated section is provided with a plurality of annular protrusions spaced apart along the extension direction of the elastic pipeline assembly, and an annular recess is formed between two adjacent annular protrusions.

4. A vehicle retractable charging cable for high-voltage, high-current charging according to claim 1, characterized in that, The elastic deformation section extends spirally along the extension direction of the elastic pipeline assembly, and the elastic pipeline assembly is in the shape of a spring wire.

5. A vehicle retractable charging cable for high-voltage, high-current charging according to claim 1, characterized in that, The resilient conduit assembly includes a single resilient tube that forms one of the receiving channels.

6. A vehicle retractable charging cable for high-voltage, high-current charging according to claim 1, characterized in that, The flexible conduit assembly includes two flexible tubes arranged in a parallel direction, and the two flexible tubes respectively form receiving channels.

7. A vehicle retractable charging cable for high-voltage, high-current charging according to claim 6, characterized in that, The charging cable assembly includes two charging cables, which are respectively disposed in two independent receiving channels.

8. A vehicle retractable charging cable for high-voltage, high-current charging according to claim 7, characterized in that, The first circuit conductor is disposed in one of the independent receiving channels, and the second circuit conductor is disposed in another of the independent receiving channels.

9. A vehicle retractable charging cable for high-voltage, high-current charging according to claim 1, characterized in that, The elastic tubing assembly includes multiple elastic tubing bodies arranged in a parallel direction, each elastic tubing body forming an independent receiving channel. The charging cable assembly includes at least two charging cables, each of which is disposed in a different independent receiving channel.

10. A vehicle retractable charging cable for high-voltage, high-current charging according to claim 1, characterized in that, The flexible tubing assembly is made of at least one material selected from TPU, TPV, TPEE, TPAE, PA11, PA12, or POM.

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