High temperature resistant automotive cable
By integrating cooling pipes and a fluid circulation system into the cables of new energy vehicles, and utilizing the inertia and acceleration generated by vehicle movement to drive fluid circulation, the problem of insufficient cooling efficiency of new energy vehicle cables in high current and voltage load environments is solved, achieving an active heat dissipation effect, and suitable for cable requirements in different environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HANGZHOU GUANJI ELECTRONIC TECH CO LTD
- Filing Date
- 2026-04-20
- Publication Date
- 2026-06-09
AI Technical Summary
In existing technologies, the cooling efficiency of conventional passive heat conduction structures for cables in new energy vehicles, especially heavy trucks, is insufficient in high-current and high-voltage load environments, and cannot meet the requirements of high-intensity working environments.
Cooling tubes are integrated into the cable, and active cooling is achieved through fluid components and slip ring structures. The fluid circulation is driven by the inertia and acceleration generated by the vehicle's movement, and heat dissipation is achieved by combining a capillary system. The blades or baffles inside the slip ring control the direction of the fluid, and the fluid circulation can be achieved by magnetic attraction with an external drive mechanism outside the slip ring.
Without altering the existing cable structure, active cooling is achieved, improving the cable's applicability and stability in complex environments and making it suitable for cable needs in various environments.
Smart Images
Figure CN122177577A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cable technology, specifically to a self-cooling cable suitable for new energy heavy trucks or new energy vehicles, and more specifically to a high-temperature resistant automotive cable. Background Technology
[0002] New energy vehicles, especially new energy heavy trucks, have high-intensity batteries and motors, which places higher demands on the electrical conductivity of cables. Correspondingly, the cables also need good cooling performance to meet the demands of high-intensity working environments. For example, a corrosion-resistant and high-temperature-resistant new energy vehicle cable (publication number CN119626657A) includes a wire core, a heat dissipation frame, and a protective sheath. The wire core has three strands, all located inside the protective sheath. A first chamber is defined between each pair of adjacent wire cores and the inner wall of the protective sheath, and a second chamber is defined between the three wire cores. The heat dissipation frame... Multiple heat dissipation frames are arranged sequentially along the length of the wire core, with adjacent heat dissipation frames deflected 120° circumferentially around the wire core. Each heat dissipation frame consists of three arc plates, with heat dissipation grooves on the side of each arc plate away from the corresponding wire core. The heat dissipation frames not only separate the three wire cores but also connect the second chamber to the first chamber through the heat dissipation grooves, dissipating heat between the three wire cores. Furthermore, the deflection of adjacent heat dissipation frames at a certain angle circumferentially around multiple wire cores ensures that the second chamber at different heat dissipation frames is connected to a first chamber, guaranteeing effective heat dissipation.
[0003] Alternatively, the existing technology, with publication number CN216928124U, discloses a high-temperature resistant and flame-retardant composite power cable for new energy vehicles, comprising a cable body, a core, and an outer sheath. The outer sheath is made of polyvinyl chloride plastic, and a flame-retardant Oxford cloth layer is fixed to the inner side of the outer sheath. An armor layer is fixed to the inner side of the flame-retardant Oxford cloth layer, a high-temperature resistant heat-insulating cotton layer is fixed to the inner side of the armor layer, and a first insulation layer is fixed to the inner side of the high-temperature resistant heat-insulating cotton layer. This application, through its designed fixed outer jacket, buffer plate, buffer sheet, fitting sleeve block, and rubber core, can effectively prevent external pressure from directly acting on the core, thereby reducing pressure and protecting the core wrapped inside the fixed outer jacket, ensuring the normal operation of the core, and thus extending the service life of the cable.
[0004] The aforementioned existing technologies have achieved excellent results in improving cable strength and heat dissipation performance, but they also have certain drawbacks. The existing technologies enhance protection by setting up multiple layers and achieve natural heat transfer through multiple heat conduction structures. However, in the working environment of new energy vehicles, especially heavy trucks, where the current and voltage loads are very high, the cooling efficiency of conventional passive heat conduction structures often fails to meet the higher usage requirements, so further improvements are needed. Summary of the Invention
[0005] The purpose of this invention is to provide a high-temperature resistant automotive cable to solve the problem mentioned in the background art that the existing technology achieves enhanced protection by setting up multiple layers and achieves natural heat transfer through multiple heat conduction structures. However, in the working environment of new energy vehicles, especially heavy trucks, where the current and voltage loads are very high, the cooling efficiency of conventional passive heat conduction structures often fails to meet the higher usage requirements.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature resistant automotive cable, comprising an insulation layer wrapped around the inner edge of the outer sheath and a copper core, and further comprising a cooling tube disposed in the cable, wherein a fluid component built into the cooling tube is used to generate fluid driving power according to the movement of the vehicle, and the fluid flow in the cooling tube is used to cool the cable.
[0007] Furthermore, the fluid assembly in the cooling pipe includes a slip ring, and the slip ring is also equipped with blades or baffles. The baffles are provided with one-way holes that restrict the direction in which the fluid can pass through, and the axis of the blade shaft is overlapped with the axis of the cooling pipe.
[0008] Furthermore, the two ends of the cooling tube are connected to a container through an extension, and the two containers are connected by several capillary tubes. Therefore, the cooling tube, the extension, the container and the capillary tubes form a fluid circulation system. The fluid circulation system drives the fluid to move through the fluid components. After absorbing heat in the cable, the fluid flows in the external capillary tubes to cool down.
[0009] Furthermore, the cooling tube is located in the insulation layer and in the area close to the outer skin.
[0010] Furthermore, the cooling tube is located at the axis of the cable, and there is still an insulating layer between the cooling tube and the copper core.
[0011] Furthermore, the cooling tube is located between the outer skin and the insulation layer or on the outside of the outer skin.
[0012] Furthermore, the slip ring is elastically slidably installed in the cooling tube via a first elastic element, and a ring body for counterweight is installed at the edge of the slip ring, while the outer surface of the ring body is an arc-shaped structure that guides the fluid to flow toward the blades.
[0013] Furthermore, a magnetic strip is attached to the outer surface of the slip ring, which is used to cooperate with a drive mechanism located outside the cable and drive the slip ring to move synchronously by moving the drive mechanism.
[0014] Furthermore, the driving mechanism includes a slider that is slidably mounted on the cable surface via a second elastic element, and the inner surface of the slider is inlaid with another magnetic strip that corresponds to and is attracted to the magnetic strip on the slip ring surface.
[0015] Compared with the prior art, the beneficial effects of the present invention are: the high-temperature resistant automotive cable, while minimizing changes to the existing mature cable distribution, combines the speed changes during vehicle operation to generate an active cooling effect, and minimizes the involvement of external electrical equipment, thereby improving functional stability and applicability in complex chassis environments, as detailed below.
[0016] 1. A heat dissipation pipe with fluid flow is integrated into the cable, and a reciprocating slip ring is installed in the heat dissipation pipe. During the vehicle's operation, the driving force is generated by inertia and acceleration, which makes the slip ring move in the heat dissipation pipe. By using the fluid guidance of the blades or the unidirectional flow restriction function of the baffle, the heat dissipation pipe and the external capillary tube can achieve the function of circulating flow to absorb and release heat, thereby achieving a better cooling effect.
[0017] 2. By using a slip ring in conjunction with the ring body, even when the heat dissipation pipe is located in the cable insulation layer or even in the wire core, the slip ring can move on its own during the vehicle's movement without the need for an external cable drive mechanism. This is achieved by utilizing the counterweight effect generated by the ring body itself, combined with the rebound effect provided by the first elastic element, thus realizing the self-flowing effect of the fluid.
[0018] 3. The use of external sliding elements: When the heat pipe is designed to be located inside or outside the outer sheath, the combined force generated during the movement of the vehicle can be used to drive the sliding elements to slide back and forth on the outside of the cable. The magnetic attraction force can then guide the internal slip ring to move together, thereby generating a fluid driving effect and simultaneously assisting in cleaning the cable surface to avoid the corresponding cooling effect.
[0019] In summary, different methods can be used to achieve active cooling effects based on different cable usage environments and specifications, making the technology more versatile. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the cooling pipe distribution structure according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the slip ring distribution structure according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the internal structure of the slip ring according to Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of another distribution configuration of the cooling tube of the present invention; Figure 6 This is a schematic diagram of the cooling pipe distribution structure in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the sliding body distribution structure of the present invention; Figure 8This is a schematic diagram of the magnetic stripe distribution structure of the present invention; Figure 9 This is a schematic diagram of the baffle distribution structure of the present invention.
[0021] In the figure: 1. Outer skin; 2. Insulation layer; 3. Copper core; 4. Extension; 5. Cooling tube; 6. Container; 7. Capillary tube; 8. Slip ring; 9. Blade; 10. Ring body; 11. First elastic element; 12. Sliding body; 13. Second elastic element; 14. Magnetic strip; 15. Baffle. Detailed Implementation
[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] Please see Figures 1-9 The present invention provides the following technical solution: Example 1: The solution disclosed in this example is intended to solve the problems existing in the prior art, specifically as follows: Figures 1-4 as well as Figure 9 As shown, the cable includes an insulation layer 2 wrapped around the inner edge of the outer sheath 1 and a copper core 3. It also includes a cooling tube 5 installed within the cable. A fluid assembly built into the cooling tube 5 generates fluid driving power based on vehicle movement. The fluid flow through the cooling tube 5 cools the cable. The fluid assembly in the cooling tube 5 includes a slip ring 8. The slip ring 8 also has blades 9 or baffles 15 installed inside. The baffle 15 has a one-way hole that restricts the direction of fluid flow. The axis of the blade 9 overlaps with the axis of the cooling tube 5. The slip ring 8 itself moves during vehicle movement. The internal design of the slip ring 8 has two options: one is a small blade 9, and the other is a baffle 15. The blade 9 is suitable for the movement of the slip ring 8. In cases of higher speeds, the cables used in household or non-heavy-duty new energy vehicles are more prone to rapid acceleration / deceleration. When the slip ring 8 drives the blade 9 to move within the cooling tube 5, the blade 9 will rotate upon impacting the fluid, creating an auxiliary fluid flow driving effect within the cooling tube 5. The baffle 15 is a general-purpose solution. The speed of the slip ring 8's movement will push the fluid flow when the baffle 15 moves in a fixed direction, while when it moves in another direction, the fluid can pass through the one-way hole. This one-way hole can be a single-sided elastic sheet, suitable for one-way fluid control of the extremely small baffle 15. When moving in a specific direction, the fluid will break through the elastic sheet, but not in the opposite direction, thus achieving a one-way effect.
[0024] Regardless of which of the above solutions is used, both ends of the cooling tube 5 can be connected to one... Figure 1 The interconnected containers 6 shown are connected to the cooling pipes 5 at both ends via extensions 4. The two containers 6 are connected by several capillary tubes 7. Therefore, the cooling pipes 5, extensions 4, containers 6 and capillary tubes 7 form a fluid circulation system. This fluid circulation system drives the fluid to move through fluid components. After absorbing heat in the cable, the fluid flows through the external capillary tubes 7 to cool down. The containers 6 can be installed on the cable surface as shown, or they can be in other empty spaces in the wiring area of a car chassis. In this process, after absorbing heat inside the cooling pipes 5, the fluid flows through the extensions 4 to the containers 6 and then flows through the capillary tubes 7, thus making full contact with the external space to achieve a cooling effect. The internal fluid can be a gas or other insulating oil, etc.
[0025] The specific location of the cooling tube 5 depends on the cable type and the cable's shielding strength requirements. The cooling tube 5 may be located within the insulation layer 2 and near the outer sheath 1, or at the cable's axis. An insulation layer 2 still separates the cooling tube 5 from the copper core 3. Therefore, when the cooling tube 5 is located within the insulation layer 2 or in the central area where the cores are distributed, the extension 4 needs to pass through numerous areas to connect with the housing 6. This type of arrangement should be used in cables with no shielding requirements or those with low shielding requirements where a shielding layer is added in the area through which the extension 4 passes. The slip ring 8 is elastically slidably mounted on the cooling tube via the first elastic element 11. In the tube 5, a ring 10 for counterweight is installed at the edge of the slip ring 8. The outer surface of the ring 10 is an arc-shaped structure that guides the fluid to flow toward the blade 9. The content of this solution is based on the relatively internal design of the cooling tube 5. The influence of the external drive mechanism cannot effectively act on the cooling tube 5 which is located relatively inward. Therefore, the slip ring 8 relies on the ring 10 set on its inner wall and the change of vehicle speed to generate the automatic movement effect of the slip ring 8. The surface of the ring 10 is arc-shaped, so it will have a guiding effect on the fluid. When using the blade 9 solution, it can achieve better performance.
[0026] Example 2: The solution disclosed in this example is more suitable for cables with high shielding requirements, or cables with relatively ample installation space, or cables requiring contact with external airflow, or cables with specific installation spacing requirements. The cooling tube 5 is located between the outer sheath 1 and the insulation layer 2, or outside the outer sheath 1. A magnetic strip 14 is attached to the outer surface of the slip ring 8. This magnetic strip 14 is used to cooperate with a drive mechanism located outside the cable. The movement of the drive mechanism drives the slip ring 8 to move synchronously. The drive mechanism includes a sliding body 12, which is slidably mounted on the cable surface via a second elastic element 13. The inner surface of the sliding body 12 is inlaid with another magnetic strip 14 that corresponds to and is attracted to the magnetic strip 14 on the surface of the slip ring 8. When the cooling tube 5 is placed as shown in the figure... Figures 6-8 As shown in the case of relative external placement, the attraction force generated by the magnetic strip 14 designed on the inner surface of the slider 12 can effectively act on the magnetic strip 14 on the surface of the slip ring 8. Therefore, the slider 12 with a certain weight is more likely to produce a sliding effect and drive the slip ring 8 to move synchronously inside the cooling tube 5. Since the inner surface of the slider 12 fits the cable surface appropriately, it can also produce an auxiliary cleaning effect on the cable during the movement of the slider 12.
[0027] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-temperature resistant automotive cable, comprising an insulation layer (2) wrapped around the inner edge of an outer sheath (1) and a copper core (3), characterized in that: It also includes a cooling tube (5) installed in the cable, wherein the fluid component built into the cooling tube (5) is used to generate fluid driving power according to the movement of the vehicle, and the fluid flow in the cooling tube (5) is used to cool the cable.
2. The high-temperature resistant automotive cable according to claim 1, characterized in that: The fluid assembly in the cooling tube (5) includes a slip ring (8), and a blade (9) or a baffle (15) is installed inside the slip ring (8). The baffle (15) is provided with a one-way hole that restricts the direction in which the fluid can pass through, and the axis of the blade (9) overlaps with the axis of the cooling tube (5).
3. The high-temperature resistant automotive cable according to claim 1, characterized in that: The cooling tube (5) is connected to a container (6) at both ends via an extension (4), and the two containers (6) are connected by several capillary tubes (7). Therefore, the cooling tube (5), extension (4), container (6) and capillary tubes (7) form a fluid circulation system. The fluid circulation system drives the fluid to move through the fluid components. After absorbing heat in the cable, the fluid flows in the external capillary tubes (7) to cool down.
4. The high-temperature resistant automotive cable according to claim 2, characterized in that: The cooling tube (5) is located in the insulation layer (2) and in the area close to the outer skin (1).
5. The high-temperature resistant automotive cable according to claim 2, characterized in that: The cooling tube (5) is located at the axis of the cable, and there is still an insulation layer (2) between the cooling tube (5) and the copper core (3).
6. The high-temperature resistant automotive cable according to claim 2, characterized in that: The cooling tube (5) is located between the outer skin (1) and the insulation layer (2) or outside the outer skin (1).
7. A high-temperature resistant automotive cable according to claim 4 or 5, characterized in that: The slip ring (8) is elastically slidably installed in the cooling tube (5) through the first elastic element (11), and a ring body (10) for counterweight is installed at the edge of the slip ring (8), while the outer surface of the ring body (10) is an arc surface structure that guides the fluid to flow toward the blade (9).
8. A high-temperature resistant automotive cable according to claim 6, characterized in that: The slip ring (8) has a magnetic strip (14) attached to its outer surface. The magnetic strip (14) is used to cooperate with the drive mechanism located outside the cable and drive the slip ring (8) to move synchronously through the movement of the drive mechanism.
9. A high-temperature resistant automotive cable according to claim 8, characterized in that: The drive mechanism includes a slider (12), which is slidably mounted on the cable surface by a second elastic element (13), and the inner surface of the slider (12) is inlaid with another magnetic strip (14) that corresponds to and is attracted to the magnetic strip (14) on the surface of the slip ring (8).