Charging cable and charging device

Abstract

This utility model discloses a charging cable and a charging device, including a cable body, a cable section, and several liquid-cooled charging cables. At least one liquid-cooled charging cable is used for inputting the cooling medium, and another for outputting the cooling medium. Each liquid-cooled charging cable has at least one portion located in the cable section and another portion located in the cable body. The charging cable also has an elastic tube and a heat-shrink tubing. The elastic tube is sleeved on the outer side of the section of the liquid-cooled charging cable located in the cable section, and the heat-shrink tubing is sleeved on the outer side of the connection between the elastic tube and the liquid-cooled charging cable. Through the synergistic design of the liquid-cooled charging cable, the elastic tube, and the heat-shrink tubing, when external mechanical impact acts on the cable, the spiral structure of the elastic tube first absorbs the impact force, dispersing it and converting it into elastic deformation energy, protecting the liquid-cooled charging cable from direct impact, thereby improving the impact resistance of the charging cable. Simultaneously, the heat-shrink tubing prevents excessive stretching and deformation of the elastic tube, while also providing flame-retardant insulation.

Description

Technical Field

[0001] This utility model relates to the field of charging accessories technology, and in particular to a charging cable and a charging device. Background Technology

[0002] With the continuous development of the electric vehicle market, efficient and fast high-power charging has attracted significant attention from industry players and customers. During high-power charging, as the transmitted power increases, the heat generated by the charging socket also increases, potentially leading to serious safety issues. Therefore, the reliability of high-power power transmission is a key area of ​​continuous focus and improvement within the industry.

[0003] However, the external structural strength of the liquid cooling pipelines in existing charging cables is relatively low, making them susceptible to breakage or failure due to external mechanical impacts (such as collisions and compression). Once the liquid cooling pipelines are damaged, coolant leakage will directly affect the heat dissipation performance of the equipment, thereby threatening the safety and reliability of the entire system. Utility Model Content

[0004] The main purpose of this invention is to provide a charging cable and charging device that improves the shock resistance of the charging cable.

[0005] To achieve the above objectives, this utility model proposes a charging cable.

[0006] In one embodiment, the charging cable includes:

[0007] Cable body;

[0008] The cable cut-out section is located at the tail end of the cable body;

[0009] A plurality of liquid-cooled charging cables, wherein at least one of the liquid-cooled charging cables is used for inputting the cooling medium and one is used for outputting the cooling medium; each of the liquid-cooled charging cables has at least a portion located in the cable cut-out section and another portion located in the cable body;

[0010] An elastic tube is sleeved on the outside of a section of the liquid-cooled charging cable located at the cut-out section of the cable;

[0011] A heat-shrink tubing is fitted over the outside of the connection between the elastic tube and the liquid-cooled charging cable.

[0012] In one embodiment, the liquid-cooled charging cable includes:

[0013] conductor;

[0014] A liquid cooling pipe, wherein the liquid cooling pipe is sleeved outside the conductor;

[0015] The elastic tube is sleeved outside the liquid cooling tube, and both ends of the elastic tube are fixedly connected to the liquid cooling tube through the heat shrink tubing.

[0016] In one embodiment, the elastic tube is a metal spring tube or a metal bellows tube.

[0017] In one embodiment, an adhesive protective material is filled between the elastic tube and the liquid-cooled charging cable.

[0018] In one embodiment, the adhesive protective material is insulating tape or foam tape.

[0019] In one embodiment, a plurality of thin-film thermocouples are disposed on the inner wall of the liquid cooling pipe, and the plurality of thin-film thermocouples are arranged at intervals along the axial direction of the pipe cavity for real-time monitoring of the axial temperature gradient.

[0020] In one embodiment, the charging cable includes two elastic tubes and two liquid-cooled charging wires. The two elastic tubes are respectively sleeved on the two liquid-cooled charging wires. One liquid-cooled charging wire is used for inputting the cooling medium, and the other liquid-cooled charging wire is used for outputting the cooling medium.

[0021] This utility model also proposes a charging device, the charging device comprising:

[0022] The device body; and

[0023] As described above, in the charging cable, one end of the cable body away from the cable cut-out section is connected to the device body.

[0024] The charging cable of this utility model includes a cable body, a cable section, and several liquid-cooled charging cables. At least one liquid-cooled charging cable is used for inputting the cooling medium, and another for outputting the cooling medium. Each liquid-cooled charging cable has at least one portion located in the cable section and another portion located in the cable body. The charging cable also has an elastic tube and a heat-shrink tubing. The elastic tube is sleeved on the outside of the section of the liquid-cooled charging cable located in the cable section, and the heat-shrink tubing is sleeved on the outside of the connection between the elastic tube and the liquid-cooled charging cable. Through the synergistic design of the liquid-cooled charging cable, the elastic tube, and the heat-shrink tubing, when external mechanical impact acts on the cable, the spiral structure of the elastic tube first absorbs the impact force, dispersing it and converting it into elastic deformation energy, protecting the liquid-cooled charging cable from direct impact, thereby improving the impact resistance of the charging cable. Simultaneously, the heat-shrink tubing prevents excessive stretching and deformation of the elastic tube, while also providing flame-retardant insulation. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the charging cable and charging device of this utility model;

[0027] Figure 2 This is a structural schematic diagram of an embodiment of the cable cut-out section of this utility model;

[0028] Figure 3 This is a cross-sectional view of an embodiment of the cable body of this utility model;

[0029] Figure 4 This is a cross-sectional view of an embodiment of the cable body of this utility model.

[0030] Explanation of icon numbers:

[0031] 1. Cable cut-out section; 11. Liquid-cooled charging cable; 12. Flexible tube; 13. Heat shrink tubing; 14. Conductor; 15. Liquid-cooled tube; 2. Cable body; 21. Protective layer.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] This utility model proposes a charging cable.

[0037] Please see Figures 1 to 4 In one embodiment of this utility model, the charging cable includes a cable body 2 and a cable cut-out section 1, the cable cut-out section 1 being located at the tail of the cable body 2; a plurality of liquid-cooled charging cables 11, at least one of which is used for inputting the cooling medium and the other for outputting the cooling medium; each liquid-cooled charging cable 11 having at least a portion located at the cable cut-out section 1 and another portion located at the cable body 2; an elastic tube 12, sleeved on the outside of the section of the liquid-cooled charging cable 11 located at the cable cut-out section 1; and a heat-shrinkable sleeve 13, sleeved on the outside of the connection between the elastic tube 12 and the liquid-cooled charging cable 11.

[0038] Specifically, the cable body 2 has a protective layer 21 and several internal wire cores. The protective layer 21 is removed from its tail end for splitting, leading out the various internal wire cores to form a cable split section 1. The cable split section 1 is located at the tail end of the cable body 2, and the charging cable connects to the power supply device through this section. The charging cable contains several liquid-cooled charging wires 11. It is understood that after the tail end of the cable body 2 is split, the liquid-cooled charging wires 11 are led out together with the other wire cores; that is, part of the liquid-cooled charging wires 11 is located inside the cable body 2, and part of them, together with the other wire cores, form the cable split section 1. The liquid-cooled charging wires 11 are used to transmit high-power electrical energy. During use, a large amount of heat is generated inside the liquid-cooled charging wires 11. Therefore, the liquid-cooled charging wires 11 also have channels for the flow of cooling medium. It is understood that at least a portion of the liquid-cooled charging wires 11 is used for inputting the cooling medium, and another portion is used for outputting the cooling medium. The flow of the cooling medium reduces the heat generated inside the charging cable during high-power charging.

[0039] The flexible tube 12 is sleeved on the outside of the section of the liquid-cooled charging cable 11 located at the cut-out section 1 of the cable, and is used to absorb external mechanical impact and protect the liquid-cooled charging cable 11. The flexible tube 12 is made of high-strength alloy material and has excellent impact resistance and chemical corrosion resistance. Understandably, the flexible tube 12 does not participate in the composition of the cable body 2 and will not affect the outer diameter of the cable body 2.

[0040] Heat shrink tubing 13 is fitted over the connection between the elastic tube 12 and the liquid-cooled charging cable 11 to secure the liquid-cooled charging cable 11 and prevent it from deforming due to stretching during assembly. The heat shrink tubing 13 is made of flame-retardant, high-temperature resistant heat shrink material, which can shrink uniformly in high-temperature environments, tightly fitting the connection between the elastic tube 12 and the liquid-cooled charging cable 11, while also providing insulation and protection. Understandably, heat shrink tubing 13 is provided at both ends of the elastic tube 12 where it connects to the liquid-cooled charging cable 11.

[0041] Further, please refer to Figures 2 to 4 The liquid-cooled charging cable 11 includes: a conductor 14; a liquid-cooled tube 15, which is sleeved on the conductor 14; and an elastic tube 12, which is sleeved on the liquid-cooled tube 15. The two ends of the elastic tube 12 are fixedly connected to the liquid-cooled tube 15 through heat-shrink tubing 13.

[0042] Specifically, the liquid-cooled charging cable 11 is the core component of the charging cable, consisting of a conductor 14 and a liquid-cooling pipe 15. The conductor 14 is composed of multi-strand copper core wires used to transmit high-power electrical energy. The liquid-cooling pipe 15 is fitted over the conductor 14 and is used to transport the cooling medium to reduce the heat generated by the charging cable during high-power charging. The liquid-cooling pipe 15 is made of pressure-resistant and corrosion-resistant materials (such as polyurethane or stainless steel). Preferably, the inner wall of the liquid-cooling pipe 12 has spiral-shaped flow channels to enhance the flow efficiency of the coolant.

[0043] The elastic tube 12 is sleeved outside the liquid cooling tube 15. When the liquid cooling tube 15 is impacted, the elastic tube 12 absorbs the external impact and prevents damage to the liquid cooling tube 15. The two ends of the elastic tube 12 are fixedly connected to the liquid cooling tube 15 by heat shrink tubing 13, which effectively prevents excessive stretching and deformation of the elastic tube 12 during the use of the charging cable, and also has flame-retardant and insulating functions.

[0044] Furthermore, the elastic tube 12 is a metal elastic tube or a metal corrugated tube.

[0045] Specifically, the elastic tube 12 can be a metal spring tube or a metal bellows, both of which possess excellent impact resistance and chemical corrosion resistance. The metal spring tube is made of a high-strength alloy material and has a helical structure. This structure effectively disperses external impact forces, converting them into elastic deformation energy, thereby protecting the liquid cooling tube 15 from damage. The high strength and corrosion resistance of the alloy material ensure that the spring tube maintains its structural strength over long periods in harsh environments such as high temperature, high humidity, and salt spray. The metal bellows is made of corrosion-resistant metal materials (such as stainless steel) and has a corrugated structure. The multi-layered corrugated design of the bellows effectively absorbs and disperses impact forces while providing good flexibility and fatigue resistance. The structural design of the bellows allows it to evenly distribute pressure when subjected to impact, avoiding localized stress concentration that could damage the liquid-cooled charging cable 11.

[0046] When an external mechanical impact is applied to the cable section 1, the structural design of the elastic tube 12 (whether it is a metal spring tube or a metal corrugated tube) first absorbs the impact force, disperses it and converts it into elastic deformation energy, thereby protecting the liquid-cooled charging cable 11 from direct impact.

[0047] In one embodiment, an adhesive protective material is filled between the elastic tube 12 and the liquid cooling tube 15.

[0048] Specifically, an adhesive protective material is filled between the elastic tube 12 and the liquid cooling tube 15, effectively preventing the sharp ends of the elastic tube 12 from damaging the liquid cooling tube 15 and causing leakage of the cooling medium, thus further enhancing the cable's protective performance. The adhesive protective material typically possesses good elasticity and adhesion, effectively filling the gap between the two. Simultaneously, when external impact forces act on the elastic tube 12, the adhesive protective material can absorb some of the impact energy, dispersing it over a larger area, thereby reducing the impact force borne by the liquid cooling tube 15. This synergistic effect significantly improves the overall impact resistance of the cable, further enhancing the impact resistance of the elastic tube 12.

[0049] Optionally, flame-retardant and pressure-resistant material can be used to fill the space between the elastic tube 12 and the liquid cooling tube 15, thereby effectively improving the reliability of the charging cable.

[0050] Furthermore, the adhesive protective material is insulating tape or foam tape.

[0051] Insulating tape possesses excellent insulation and adhesion properties, effectively filling the gap between the elastic tube 12 and the liquid cooling tube 15 to prevent coolant leakage. Insulating tape is typically made of insulating materials (such as polyimide or polytetrafluoroethylene), capable of withstanding high voltage and high temperature environments while providing excellent insulation protection. Foam tape has excellent elasticity and cushioning properties, absorbing impact and further enhancing the cable's impact resistance. Foam tape is typically made of closed-cell foam materials (such as polyethylene or polyurethane foam), possessing good flexibility and weather resistance, providing additional cushioning protection when subjected to impact.

[0052] Insulating tape or foam tape is filled between the elastic tube 12 and the liquid cooling tube 15 to effectively seal the gap between them. The high adhesion and chemical corrosion resistance of the insulating tape ensure the stability of the sealing performance during long-term use, while the elasticity of the foam tape can adapt to the deformation of the elastic tube 12 under impact, further enhancing the reliability of the charging cable.

[0053] Furthermore, multiple thin-film thermocouples (not shown in the figure) are installed on the inner wall of the liquid cooling tube 15. The multiple thin-film thermocouples are arranged at intervals along the axial direction of the tube cavity to monitor the axial temperature gradient in real time.

[0054] Thin-film thermocouples are high-precision temperature sensors characterized by fast response and high sensitivity. In this embodiment, multiple thin-film thermocouples are arranged axially at intervals along the inner wall of the liquid cooling pipe 15. These thermocouples can monitor temperature changes at different locations within the liquid cooling pipe 15 in real time, providing data on the axial temperature gradient. Thin-film thermocouples are typically composed of thin foils of two different metals, and temperature is determined by measuring the thermoelectric potential difference.

[0055] Multiple thin-film thermocouples are arranged axially at intervals along the inner wall of the liquid cooling pipe 15, enabling real-time monitoring of temperature changes at different locations. This design allows the cooling system to adjust the flow rate and volume of the coolant promptly based on changes in the temperature gradient, ensuring that the cable remains within a suitable operating temperature range during high-power charging. By monitoring the axial temperature gradient in real time, the cooling system can dynamically adjust its cooling strategy and optimize the cooling effect.

[0056] In one embodiment, the charging cable includes two elastic tubes 12 and two liquid-cooled charging wires 11, with the two elastic tubes 12 respectively sleeved on the two liquid-cooled charging wires 11. One liquid-cooled charging wire is used for inputting the cooling medium, and the other liquid-cooled charging wire is used for outputting the cooling medium.

[0057] In this embodiment, the liquid-cooled charging cable 11 for inputting the cooling medium has an inlet pipe. The inlet pipe is part of the liquid cooling system and is responsible for delivering the coolant into the cable. The inlet pipe is made of pressure-resistant and corrosion-resistant materials (such as polyurethane or stainless steel) to ensure stable operation under high pressure and high temperature environments. The inner wall of the inlet pipe has spiral-shaped flow channels to enhance the flow efficiency of the coolant and ensure that the coolant is evenly distributed inside the cable. The liquid-cooled charging cable 11 for outputting the cooling medium includes an outlet pipe. The outlet pipe is also part of the liquid cooling system and is responsible for discharging the coolant after it has absorbed heat from the cable. The structure of the outlet pipe is similar to that of the inlet pipe; it is also made of pressure-resistant and corrosion-resistant materials and has spiral-shaped flow channels to ensure that the coolant can efficiently carry heat away from the cable.

[0058] By incorporating two liquid cooling pipes 15 (inlet and outlet), the coolant forms a cooling loop with one inlet and one outlet within the liquid cooling system, ensuring efficient heat absorption and dissipation. This dual-pipe design results in more uniform coolant flow, thereby optimizing the overall cooling system performance. The separate inlet and outlet pipes clarify the coolant flow path, preventing mixing during circulation and improving thermal management efficiency. The coolant can more effectively remove the heat generated by the cable during high-power charging, ensuring the cable remains within its optimal operating temperature range.

[0059] In another embodiment, the charging cable includes four flexible tubes 12 and four liquid-cooled charging lines 11, two of which are used for inputting the cooling medium and the other two are used for outputting the cooling medium.

[0060] This utility model also proposes a charging device; please refer to [link / reference]. Figures 1 to 3 The charging device includes a device body and a charging cable; the charging cable is connected to the device body through one end of the cable body 2 away from the cable section 1. The specific structure of the charging cable is as described in the above embodiments. Since this charging device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0061] In one embodiment of this utility model, the device body is the core component of the charging device, including a power module, a control module, a cooling system, and a safety protection module. The power module is responsible for converting mains power into DC or AC power suitable for charging electric vehicles. The control module manages the charging process, including current and voltage regulation and monitoring of the charging status. The cooling system ensures that the device body does not overheat during high-power output. The safety protection module provides overcurrent, overvoltage, and short-circuit protection to ensure the safety of the charging process. A charging cable connects the device body and the electric vehicle for transmitting electrical energy. The charging cable includes a cable body 2, multiple liquid-cooled pipes 15 (inlet and outlet pipes), an elastic tube 12, and a heat-shrink tubing 13. The cable body 2 contains multiple copper core wires for transmitting high-power electrical energy. The liquid-cooled pipes 15 circulate coolant to reduce the heat generated by the cable during high-power charging. The elastic tube 12 is fitted over the liquid-cooled pipes 15, providing mechanical protection and impact resistance. The heat-shrink tubing 13 secures the connection between the elastic tube 12 and the liquid-cooled pipes 15, ensuring the stability and sealing of the connection.

[0062] By organically integrating the charging cable with the device body, this invention achieves efficient power transmission, optimized thermal management, and enhanced safety and reliability. This design extends the service life of the charging device and cable, simplifies assembly and maintenance, and adapts to various charging scenarios, providing a safer and more efficient charging solution for electric vehicles and other devices.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A charging cable, characterized in that, The charging cable includes: Cable body (2); The cable cut-out section (1) is located at the tail of the cable body (2); A plurality of liquid-cooled charging cables (11), wherein at least one of the liquid-cooled charging cables (11) is used for inputting the cooling medium and one is used for outputting the cooling medium; each of the liquid-cooled charging cables (11) has at least a portion located in the cable cut-out section (1) and another portion located in the cable body (2); An elastic tube (12) is sleeved on the outside of a section of the liquid-cooled charging cable (11) located in the cut-out section (1) of the cable; A heat shrink tubing (13) is fitted over the outside of the connection between the elastic tube (12) and the liquid-cooled charging cable (11).

2. The charging cable of claim 1, wherein, The liquid-cooled charging cable includes: Conductor (14); Liquid cooling tube (15), which is sleeved outside the conductor (14); The elastic tube (12) is sleeved on the outside of the liquid cooling tube (15), and the two ends of the elastic tube (12) are fixedly connected to the liquid cooling tube (15) through the heat shrink tubing (13).

3. The charging cable of claim 1, wherein, The elastic tube (12) is a metal spring tube or a metal corrugated tube.

4. The charging cable of claim 1, wherein, The space between the elastic tube (12) and the liquid-cooled charging cable (11) is filled with an adhesive protective material.

5. The charging cable of claim 4, wherein, The adhesive protective material is insulating tape or foam tape.

6. The charging cable of claim 2, wherein, Multiple thin-film thermocouples are provided on the inner wall of the liquid cooling pipe (15). The multiple thin-film thermocouples are arranged at intervals along the axial direction of the liquid cooling pipe (15) for real-time monitoring of the axial temperature gradient.

7. The charging cable of claim 1, wherein, The charging cable includes two elastic tubes (12) and two liquid-cooled charging lines (11). The two elastic tubes (12) are respectively sleeved on the two liquid-cooled charging lines (11). One liquid-cooled charging line (11) is used to input the cooling medium, and the other liquid-cooled charging line (11) is used to output the cooling medium.

8. A charging device, characterized by The charging device includes: The device body; and The charging cable as described in any one of claims 1 to 7, wherein the end of the cable body (2) away from the cable cut-out section (1) is connected to the device body.

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