Temperature-measurable liquid-cooled charging cable and production process

Abstract

The invention relates to the field of new energy charging cables, and discloses a temperature-measurable liquid cooling charging cable and a production process thereof, the temperature-measurable liquid cooling charging cable comprises a circular outer sheath, a cross-shaped support frame is arranged in the outer sheath in a penetrating manner, and the support frame divides the inner part of the outer sheath into four fan-shaped channels; a first main wire core, a control wire group, a second main wire core and a ground wire are sequentially arranged in the four fan-shaped channels, the sections of the first main wire core and the second main wire core are fan-shaped filling the fan-shaped channels, the fan-shaped channel where the control wire group is located is a liquid inlet channel, and the fan-shaped channel where the ground wire is located is a liquid outlet channel; the two ends of the first main wire core and the second main wire core are respectively provided with a temperature measuring unit, and the temperature measuring units are connected with the control wire group. The problem that a liquid cooling charging cable in the prior art cannot adjust the flow velocity of the cooling liquid according to the actual heating condition of the main wire cores can be solved.

Description

Technical Field

[0001] The present invention relates to the field of new energy charging cables, and in particular to a temperature-measurable liquid-cooled charging cable and a production process. Background Art

[0002] With the rapid development of the new energy vehicle industry, the performance and safety of new energy charging piles, as key infrastructure, have attracted much attention. Among the core components of new energy charging piles, the performance of charging cables directly affects the charging efficiency and stability.

[0003] At present, traditional charging cables have many problems in dealing with high-power charging. During high-power charging, the main core will generate a lot of heat due to the transmission of large current. If the heat cannot be dissipated in time, it will not only reduce the charging efficiency, but also may cause safety hazards, such as overheating of the cable, causing aging of the insulation layer, and even causing fire. Although some existing charging cables use liquid cooling technology to dissipate heat, they are insufficient in controlling the coolant flow rate. Most traditional charging cables cannot adjust the coolant flow rate in real time and accurately according to the actual heating of the main core. When the main core heats up less, if the coolant flow rate remains high, it will cause energy waste and unnecessary loss of the cooling system; when the main core heats up seriously, if the coolant flow rate cannot be increased in time, it cannot effectively dissipate heat, and it is difficult to meet the heat dissipation requirements of high-power charging.

[0004] In addition, traditional charging cables also have defects in their structural design. On the one hand, the layout of each wire core is not reasonable, resulting in a large cable volume, taking up a lot of space, inconvenient installation in the limited space inside the charging pile, and not conducive to wiring and maintenance; on the other hand, the overall structure is not compact enough, affecting the mechanical properties and stability of the cable, and it is easy to be damaged by external forces during actual use. Summary of the invention

[0005] The present invention is intended to provide a temperature-measurable liquid-cooled charging cable to improve the problem in the prior art that the liquid-cooled charging cable cannot adjust the coolant flow rate according to the actual heating condition of the main line core.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a temperature-measurable liquid-cooled charging cable, comprising a circular outer sheath, a cross-shaped support frame is inserted into the outer sheath, the support frame divides the interior of the outer sheath into four fan-shaped channels, and the four fan-shaped channels are respectively provided with a first main line core, a control line group, a second main line core and a ground wire, the cross-sectional shape of the first main line core and the second main line core are both fans that fill the fan-shaped channels, the fan-shaped channel where the control line group is located is a liquid inlet channel, and the fan-shaped channel where the ground wire is located is a liquid discharge channel, and temperature measuring units are provided at both ends of the first main line core and the second main line core, and the temperature measuring units are connected to the control line group.

[0007] Preferably, as an improvement, the first main line core and the second main line core both include a main conductor and a main insulating layer, the main conductor is fan-shaped, and the main insulating layer is wrapped around the main conductor.

[0008] Preferably, as an improvement, the control wire group includes a temperature measuring wire core and multiple control wire cores twisted together, and a shielding layer is woven after the temperature measuring wire core and the control wire core are twisted together, and a control wire core insulation layer is provided outside the shielding layer.

[0009] Preferably, as an improvement, the temperature measuring unit is connected to the temperature measuring wire core.

[0010] Preferably, as an improvement, the conductors of the first main line core, the second main line core, the control line core and the ground wire are all Category 6 conductors, the insulation layers of the first main line core, the second main line core, the control line core and the ground wire are all low-temperature resistant insulating materials, and the outer sheath is made of polylaurolactam.

[0011] Preferably, as an improvement, the support frame is a PE support frame.

[0012] Preferably, as an improvement, arc-shaped support sheets are provided at the ends of the four limbs of the support frame.

[0013] Preferably, as an improvement, a plurality of through holes are provided on the four limbs of the support frame, and the temperature measuring units are embedded in the through holes.

[0014] The present invention also provides a production process for a temperature-measurable liquid-cooled charging cable, comprising:

[0015] A. Main line core production

[0016] Category 6 conductors are selected as the main conductor material for the first and second main cores. Category 6 conductors have good flexibility and conductivity, meeting the cable's requirements for high current transmission and bending performance. Category 6 conductors are processed into fan-shaped shapes using extrusion and drawing equipment to meet the spatial layout design inside the cable. During the processing, the dimensional accuracy and surface quality of the conductors are strictly controlled to ensure that they meet relevant standards.

[0017] Insulation extrusion: extrusion of low-temperature resistant insulation material on the processed fan-shaped main conductor. Before extrusion, the insulation material is preheated to ensure its fluidity and uniformity. The extruder is equipped with a fan-shaped extrusion die to accurately control the extrusion temperature, pressure, speed and other parameters to ensure that the low-temperature resistant insulation layer is evenly and tightly wrapped on the main conductor, and the thickness meets the design requirements. After the extrusion is completed, the insulation layer is inspected for quality, including thickness measurement, insulation performance test, etc., to ensure its quality.

[0018] Temperature measurement unit installation: Install the temperature measurement unit on the first main line core and the second main line core near the charging pile and the charging gun respectively. When installing, first reserve a suitable installation position on the main line core, then accurately embed the temperature measurement unit, and use a reliable fixing method, such as special thermal conductive adhesive bonding and fixing, to ensure that the temperature measurement unit is tightly connected to the main line core and will not loosen or fall off during use.

[0019] B. Control line group production

[0020] Wire core twisting: Twist six control wire cores and one temperature measurement wire core. Use professional twisting equipment to strictly control the twisting pitch, direction and tension to ensure that each wire core is twisted together evenly and tightly to form a stable control wire group structure.

[0021] Braided shielding: Braided shielding is performed on the twisted control wire group. Select appropriate shielding materials, such as copper wire or aluminum wire, and use a braiding machine to evenly weave the shielding material on the surface of the control wire group. During the weaving process, control the weaving density and coverage to ensure that the shielding effect meets the requirements and effectively shields external electromagnetic interference.

[0022] Insulation extrusion: The control wire core insulation layer is extruded outside the braided shielding layer. The same low-temperature resistant insulation material as the main wire core is used to ensure the quality and performance of the control wire core insulation layer and protect the control wire group from the influence of the external environment.

[0023] C. Grounding core production: Select Category 6 conductors as the conductor material of the grounding core, and then extrude the conductor with low-temperature resistant insulation material consistent with the main core to form a complete grounding core. During the extrusion process, various process parameters and quality inspection links are also strictly controlled to ensure the quality of the grounding core.

[0024] D. Support frame preparation: Use PE or PPS material to make a cross-shaped support frame. Through injection molding or other suitable processing technology, extrude the material into a cross-shaped structure with a specific shape and size. The four ends of the cross-shaped structure are provided with arc-shaped support pieces to better fit the fan-shaped channel inside the cable, provide support when extruding the outer sheath to prevent the sheath material from collapsing or rupturing, and enhance the support effect on the product as a whole after molding. A through hole is opened at the end of the support frame for embedding the temperature measuring unit. After production is completed, the support frame is quality inspected to ensure that its dimensional accuracy, mechanical strength, etc. meet the requirements.

[0025] E. Cable body assembly: Place the prepared first main line core, control line group, second main line core and ground wire in the four fan-shaped channels divided by the cross-shaped support frame according to the design requirements. The fan-shaped cross-sectional shapes of the first main line core and the second main line core just fill the corresponding fan-shaped channels. The control line group is placed in the fan-shaped channel of the liquid inlet channel, and the ground wire is placed in the fan-shaped channel of the liquid discharge channel. During the placement process, pay attention to the position and direction of each core to ensure accuracy. At the same time, embed the temperature measuring unit on the main line core into the through holes on the four limbs of the support frame, and fix and seal it to prevent external factors from affecting the normal operation of the temperature measuring unit, and connect the temperature measuring unit to the temperature measuring core. Wrap a layer of PP tape around the surface of the assembled cable body, and limit the position of each core and line group to form a cable to facilitate the subsequent extrusion of the outer sheath.

[0026] F. In the fan-shaped channel where the control line group is located, the gap between the insulation layer of the control line group and the support frame is directly used as the liquid inlet channel to ensure the sealing and smoothness of the liquid inlet channel to prevent coolant leakage and blockage. In the fan-shaped channel where the ground wire is located, the channel gap is used to build a drainage channel to ensure that the drainage channel and the liquid inlet channel are independent of each other and have good flow performance so that the coolant can smoothly return to the cooling system.

[0027] H. Extrusion of outer sheath

[0028] Polylaurolactam is selected as the outer sheath material, the raw material of polylaurolactam is pretreated, and the material is evenly extruded on the outside of the cable body after the cable is formed by using an extruder. During the extrusion process, the extrusion temperature, pressure, speed and mold parameters are precisely controlled to ensure that the thickness of the outer sheath is uniform, the surface is smooth, and there are no defects such as cracks and bubbles. The thickness of the outer sheath is designed and controlled according to the use environment and performance requirements of the cable to provide sufficient mechanical protection and protective performance. After the extrusion is completed, the cable is post-processed, such as cooling and shaping. Then, the finished cable is subjected to comprehensive quality inspection, including appearance inspection, dimension measurement, electrical performance test, insulation performance test, cooling performance test, etc., to ensure that the performance indicators of the cable meet the relevant standards and design requirements. Only cables that have passed all tests can enter the next link or be delivered as qualified products.

[0029] The principle of this scheme is: in actual application, the first main core and the second main core adopt a fan-shaped design that fills the fan-shaped channel, which maximizes the use of the internal space of the cable. At the same time, this design allows the coolant to surround the main core more effectively, improves the heat exchange efficiency, and helps to quickly dissipate heat. The main core conductor adopts a Category 6 conductor, which not only improves the current transmission efficiency, but also enhances the mechanical strength and wear resistance of the conductor, which is suitable for high-power charging environments. Temperature measuring units are respectively set near the charging pile and the charging gun of the main core. These temperature measuring units can sense the temperature changes at both ends of the main core in real time. The temperature measuring unit is connected to the temperature measuring core in the control line group, and the temperature information is transmitted to the charging pile and the terminal device through the temperature measuring core. After the charging pile and the terminal receive the temperature data, they can monitor and analyze the temperature conditions during the charging process in real time. When the temperature measuring unit detects that the main core is heated to a low temperature, the cooling pump reduces the coolant flow rate to avoid energy waste and unnecessary loss of the cooling system; when the main core is heated seriously, the cooling pump increases the coolant flow rate to enhance the heat dissipation effect and meet the heat dissipation requirements of high-power charging. In the control line group, six control cores and one temperature control core are twisted together and then braided and shielded, which can effectively shield external electromagnetic interference and ensure the accuracy of signal transmission in the control line group. A low-temperature resistant sheath is extruded outside the shielding layer, which further enhances the reliability of the control line group in harsh environments. During the cabling process, a support frame is used to combine two main cores, control cores and ground cores to form a stable structure. The PE support frame has good flexibility and mechanical strength. Its cross-shaped structure divides the inside of the outer sheath into four fan-shaped channels, providing precise positioning and support for each core to avoid displacement or mutual interference of the core inside the cable. At the same time, this structure makes the cable more compact as a whole and enhances the mechanical properties and stability of the cable. The support frame is used to separate the liquid inlet channel and the liquid discharge channel. The coolant enters the liquid inlet channel where the control line group is located, flows through the entire cable, fully absorbs the heat generated by the main core, etc., and then returns from the liquid discharge channel where the ground wire is located. This unique coolant circulation path design cleverly utilizes the space inside the cable to cool down the first main line core and the second main line core from both sides of the fan shape. Compared with the traditional coolant channel design, it greatly saves space inside the cable and improves space utilization.

[0030] The advantages of the temperature-measurable liquid-cooled charging cable provided by the present invention include:

[0031] 1. The flow rate can be controlled according to the situation: The intelligent control system constructed by the temperature measurement unit and the temperature control core can adjust the coolant flow rate in real time and accurately according to the actual heating situation of the main core. This intelligent control method avoids the blindness of traditional charging cables in controlling the coolant flow rate, prevents energy waste and cooling system loss under low heating conditions, and ensures effective heat dissipation under high heating conditions, improves the energy utilization efficiency and operational reliability of the cooling system, and meets the heat dissipation requirements under different charging power and environmental conditions.

[0032] 2. Compact structure: The cross-shaped support frame is used to combine the cores together, making the internal structure of the cable neat and compact. The cores support each other and are accurately positioned to avoid shaking and displacement of the cores inside the cable. This compact structure not only enhances the mechanical properties of the cable, making it less likely to be damaged when stretched, bent or squeezed by external forces, but also improves the overall stability of the cable, ensuring reliable operation in various complex use environments.

[0033] 3. Fast cooling: The precise temperature monitoring system combined with the intelligent coolant flow rate control mechanism greatly improves the cooling effect. The temperature measurement unit monitors the temperature of the main core in real time, and promptly feeds back the temperature information to the cooling pump through the temperature control core. The cooling pump quickly adjusts the coolant flow rate according to the temperature change. When the main core is seriously heated, the coolant flow rate can be quickly increased to increase the heat dissipation to ensure that the temperature of the main core is always kept within a safe range, effectively improving the charging efficiency and reducing the safety hazards caused by overheating.

[0034] 4. Save space: Through the unique fan-shaped core design and reasonable coolant circulation channel layout, the space inside the cable is fully utilized. Compared with the traditional round core and complex coolant channel design, the temperature-measurable liquid-cooled charging cable of the present invention can accommodate more functional components under the same outer diameter conditions, or reduce the outer diameter of the cable while achieving the same function, so that it is easier to install and wire in the limited space inside the charging pile, and also reduces the space occupied by other equipment.

[0035] The advantages of the production process of a temperature-measurable liquid-cooled charging cable provided by the present invention include:

[0036] 1. Accurate adaptation and efficient space utilization

[0037] The shape of the wire core matches the channel: In the production of the main wire core, the six-category conductor is processed into a fan shape to perfectly fit the fan-shaped channel divided by the cross-shaped support frame. This precise design realizes the close arrangement of the wire core in the limited space inside the cable. Compared with the traditional round wire core, it greatly improves the space utilization rate, reduces the overall volume of the cable, facilitates installation and wiring inside equipment such as charging piles, and reduces the requirements for installation space.

[0038] Reasonable layout of coolant channels: In the coolant channel processing process, the fan-shaped channels where the control wire group and the ground wire are located are cleverly used as the liquid inlet and discharge channels respectively. Without occupying a large amount of extra space, a complete coolant circulation system is constructed, which further saves valuable space inside the cable and makes the cable structure more compact and efficient.

[0039] 2. Reliable performance guarantee

[0040] Combination of high-quality materials and processes: In the process of making each wire core, the selection of six types of conductors ensures good conductivity and flexibility to meet the needs of large current transmission and bending. Extruded low-temperature resistant insulation materials, whether it is the main wire core, control wire group or grounding wire core, ensure the stable operation of the cable in a low-temperature environment and broaden the use scenarios. In the production of the support frame, PE material is selected, whose good flexibility and mechanical strength provide reliable support for the internal structure of the cable, enhancing the overall stability and mechanical properties of the cable.

[0041] Strict quality control: In the entire production process, from core preparation to outer sheath extrusion, strict quality inspection steps are set up in each link. For example, the dimensional accuracy and surface quality inspection of the conductor after processing, the thickness and insulation performance test after insulation extrusion, the overall structure inspection after cabling, and the comprehensive performance inspection of the finished cable, etc., to ensure that the quality of each process meets the standards, thereby ensuring the reliability and safety of the final product.

[0042] 3. Intelligent temperature control function realization

[0043] Precise temperature monitoring installation: When making the main line core, accurately install the temperature measuring unit near the charging pile and charging gun, and reliably connect it to the temperature measuring core in the control line group. This precise installation and connection method ensures that the temperature measuring unit can monitor the temperature at both ends of the main line core in real time and accurately, and stably transmit the temperature information, providing key data support for the subsequent coolant flow rate control.

[0044] Intelligent flow rate control basic construction: By controlling the processes of core twisting, braided shielding and insulation extrusion in the production of the control line group, the stability and accuracy of the temperature control core (temperature measurement core) signal transmission are ensured. This lays a solid foundation for the charging pile cooling pump to accurately control the transmission flow and rate of the coolant according to the temperature information transmitted by the temperature control core, and realizes the intelligent control of the coolant flow rate according to the heating condition of the main core, improving the efficiency and energy utilization of the cooling system.

[0045] 4. Efficient production process

[0046] The process steps are connected in an orderly manner: the entire production process, from core preparation, cabling process, coolant channel processing to outer sheath extrusion, is closely connected and carried out in an orderly manner. The previous process fully prepares for the next process. For example, the cable process can be directly entered after the core preparation is completed, which reduces the waiting and turnaround time in the intermediate links and improves production efficiency.

[0047] Optimization of equipment and process parameters: In each production link, such as conductor processing, insulation extrusion, stranding, cabling and outer sheath extrusion, the equipment and process parameters are precisely controlled and optimized. For example, the extrusion equipment accurately controls the temperature, pressure and speed, and the stranding equipment strictly controls the stranding pitch and tension, etc., to ensure that each process can run efficiently and stably, reduce the scrap rate and improve production efficiency.

[0048] 5. The support frame is made of PE (polyethylene) or PPS (polyphenylene sulfide). The support frame made of PPS has good thermal conductivity and low thermal expansion coefficient. As the supporting structure inside the cable body, it can not only ensure the structural stability and reliability of each fan-shaped channel, but also effectively transfer the heat of the main line core for heat dissipation, which is beneficial to the liquid cooling and temperature control of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The following is further described in detail through specific implementation methods:

[0051] The figure marks in the drawings of the specification include: outer sheath 1, first main line core 2, control line group 3, second main line core 4, ground wire 5, support frame 6, support plate 7, drainage channel 8, liquid inlet channel 9, main insulation layer 10, temperature measuring unit 11, temperature measuring line core 12, control line core 13.

[0052] Embodiment 1, basically as attached Figure 1As shown: A temperature-measurable liquid-cooled charging cable comprises a circular outer sheath 1, a cross-shaped support frame 6 is inserted into the outer sheath 1, and the support frame 6 is a PE or PPS support frame 6, and arc-shaped support sheets 7 are arranged at the four ends of the support frame 6. The support frame 6 divides the interior of the outer sheath 1 into four fan-shaped channels, and the first main core 2, the control line group 3, the second main core 4 and the ground wire 5 are arranged in sequence in the four fan-shaped channels. The cross-sectional shapes of the first main core 2 and the second main core 4 are both fan-shaped to fill the fan-shaped channels. The first main core 2 and the second main core 4 both include a main conductor and a main insulating layer 10. The main conductor is fan-shaped, and the main insulating layer 10 is wrapped on the main conductor. The fan-shaped channel where the control line group 3 is located is a liquid inlet channel 9. The control line group 3 includes a temperature measuring core 12 and a plurality of control cores 13 twisted together. The temperature measuring core 12 and the control core 13 are twisted and woven with a shielding layer, and an insulating layer of the control core 13 is arranged outside the shielding layer. The fan-shaped channel where the ground wire 5 is located is a drainage channel 8. Temperature measuring units 11 are provided at both ends of the first main line core 2 and the second main line core 4. A through hole is provided at the end of the support frame 6. The temperature measuring unit 11 is embedded in the through hole. The temperature measuring unit 11 is connected to the temperature measuring wire core 12.

[0053] The conductors of the first main line core 2, the second main line core 4, the control line core 13, and the ground line 5 are all Category 6 conductors, the insulation layers of the first main line core 2, the second main line core 4, the control line core 13, and the ground line 5 are all low-temperature resistant insulating materials, and the outer sheath 1 is made of polylaurolactam.

[0054] Embodiment 2, a production process of a temperature-measurable liquid-cooled charging cable, used to produce a temperature-measurable liquid-cooled charging cable of embodiment 1, comprising:

[0055] A. Main line core production

[0056] Category 6 conductors are selected as the main conductor materials for the first main core 2 and the second main core 4. Category 6 conductors have good flexibility and conductivity, and meet the cable's requirements for large current transmission and bending performance. Category 6 conductors are processed into a fan-shaped shape using extrusion and drawing equipment to meet the spatial layout design inside the cable. During the processing, the dimensional accuracy and surface quality of the conductors are strictly controlled to ensure that they meet relevant standards.

[0057] Insulation extrusion: extrusion of low-temperature resistant insulation material on the processed fan-shaped main conductor. Before extrusion, the insulation material is preheated to ensure its fluidity and uniformity. Advanced extrusion equipment is used to accurately control extrusion parameters such as temperature, pressure and speed to ensure that the low-temperature resistant insulation layer is evenly and tightly wrapped on the main conductor, and the thickness meets the design requirements. After extrusion, the insulation layer is inspected for quality, including thickness measurement, insulation performance test, etc., to ensure its quality.

[0058] Installation of the temperature measuring unit 11: The temperature measuring unit 11 is installed on the first main line core 2 and the second main line core 4 near the charging pile and the charging gun respectively. During installation, a suitable installation position is reserved on the main line core first, and then the temperature measuring unit 11 is accurately embedded and fixed in a reliable manner, such as with a special thermal conductive adhesive, to ensure that the temperature measuring unit 11 is tightly connected to the main line core and will not loosen or fall off during use.

[0059] B. Production of control line group 3

[0060] Wire core twisting: Twist six control wire cores 13 and one temperature measuring wire core 12. Use professional wire twisting equipment to strictly control the twisting pitch, direction and tension to ensure that each wire core is twisted together evenly and tightly to form a stable control wire group 3 structure.

[0061] Braided shielding: Perform a braided shielding process on the twisted control wire group 3. Select appropriate shielding materials, such as copper wire or aluminum wire, and use a braiding machine to evenly braid the shielding material on the surface of the control wire group 3. During the braiding process, control the braiding density and coverage to ensure that the shielding effect meets the requirements and effectively shields external electromagnetic interference.

[0062] Insulation extrusion: Extrude the control wire core 13 insulation layer outside the braided shielding layer. Use the same low-temperature resistant insulation material as the main wire core, and operate according to the process parameters and quality control methods similar to the insulation extrusion of the main wire core to ensure the quality and performance of the control wire core 13 insulation layer and protect the control wire group 3 from the external environment.

[0063] C. Production of ground wire 5: Select Category 6 conductors as the conductor material of ground wire 5, and extrude low-temperature resistant insulation materials consistent with the main wire core on the conductor to form a complete ground wire 5. During the extrusion process, various process parameters and quality inspection links are also strictly controlled to ensure the quality of ground wire 5.

[0064] D. Preparation of support frame 6: PPS material is used to make the cross-shaped support frame 6. Through injection molding or extrusion molding, the PPS material is processed into a cross-shaped strip, and arc-shaped support pieces 7 are set at the ends of the four limbs to better fit the fan-shaped channel inside the cable and enhance the support effect. At the end of the support frame 6, a through hole is opened according to the design requirements for embedding the temperature measuring unit 11. After the production is completed, the support frame 6 is quality inspected to ensure that its dimensional accuracy, mechanical strength, etc. meet the requirements.

[0065] E. Cable body assembly: Place the prepared first main core 2, control wire group 3, second main core 4 and ground wire 5 in the four fan-shaped channels divided by the cross-shaped support frame 6 according to the design requirements. The fan-shaped cross-sectional shapes of the first main core 2 and the second main core 4 just fill the corresponding fan-shaped channels. The control wire group 3 is placed in the fan-shaped channel of the liquid inlet channel 9, and the ground wire 5 is placed in the fan-shaped channel of the liquid discharge channel 8. During the placement process, pay attention to the position and direction of each core to ensure accuracy. At the same time, embed the temperature measuring unit 11 on the main core into the through hole on the four limbs of the support frame 6, and fix and seal it to prevent external factors from affecting the normal operation of the temperature measuring unit 11. At the same time, reliably connect the temperature measuring unit 11 with the temperature measuring wire core 12 to ensure the stability of the temperature signal transmission. Wrap a layer of PP tape around the surface of the assembled cable body, and limit the position of each core and wire group to form a cable, so as to facilitate the subsequent extrusion of the outer sheath 1.

[0066] F. In the fan-shaped channel where the control line group 3 is located, the gap between the insulation layer of the control line group 3 and the support frame 6 is directly used as the liquid inlet channel 9 to ensure the sealing and smoothness of the liquid inlet channel 9 to prevent leakage and blockage of the coolant. In the fan-shaped channel where the ground wire 5 is located, the channel gap is also used to construct the drain channel 8 to ensure that the drain channel 8 and the liquid inlet channel 9 are independent of each other and have good flow performance so that the coolant can smoothly return to the cooling system.

[0067] H, outer sheath 1 extruded

[0068] Polylaurolactam (nylon 12) is selected as the material of the outer sheath 1. The nylon 12 raw material is pretreated, such as drying, mixing additives, etc., to improve its processing performance and product performance. The nylon 12 material is evenly extruded on the outside of the cable after cabling by using an extruder. During the extrusion process, the extrusion temperature, pressure, speed and mold parameters are precisely controlled to ensure that the thickness of the outer sheath 1 is uniform, the surface is smooth, and there are no defects such as cracks and bubbles. The thickness of the outer sheath 1 is designed and controlled according to the use environment and performance requirements of the cable to provide sufficient mechanical protection and protective performance. After the extrusion is completed, the cable is post-processed, such as cooling and shaping. Then, the finished cable is subjected to comprehensive quality inspection, including appearance inspection, dimension measurement, electrical performance test, insulation performance test, cooling performance test, etc., to ensure that the performance indicators of the cable meet the relevant standards and design requirements. Only cables that have passed all tests can enter the next link or be delivered as qualified products.

[0069] Embodiment 3: The difference between this embodiment and embodiment 2 is that a plurality of cooling holes are arranged side by side along the length direction in the middle of the four limbs of the support frame 6, and the cooling medium can directly cool the first main line core 2 and the second main line core 4 through the cooling holes.

[0070] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A temperature-measurable liquid-cooled charging cable, characterized in that: It includes a circular outer sheath with a cross-shaped support frame inserted inside the outer sheath, the support frame divides the inside of the outer sheath into four fan-shaped channels, the four fan-shaped channels are respectively provided with a first main line core, a control line group, a second main line core and a ground wire, the cross-sectional shape of the first main line core and the second main line core are both fans that fill the fan-shaped channels, the fan-shaped channel where the control line group is located is a liquid inlet channel, and the fan-shaped channel where the ground wire is located is a liquid discharge channel, and temperature measuring units are provided at both ends of the first main line core and the second main line core, and the temperature measuring units are connected to the control line group.

2. The temperature-measurable liquid-cooled charging cable according to claim 1, characterized in that: The first main line core and the second main line core both include a main conductor and a main insulating layer. The main conductor is fan-shaped, and the main insulating layer is wrapped around the main conductor.

3. The temperature-measurable liquid-cooled charging cable according to claim 2, characterized in that: The control line group comprises a temperature measuring line core and a plurality of control line cores twisted together. A shielding layer is woven after the temperature measuring line core and the control line core are twisted together, and a control line core insulation layer is arranged outside the shielding layer.

4. The temperature-measurable liquid-cooled charging cable according to claim 3, characterized in that: The temperature measuring unit is connected to the temperature measuring wire core.

5. The temperature-measurable liquid-cooled charging cable according to claim 4, characterized in that: The conductors of the first main line core, the second main line core, the control line core and the ground wire are all Category 6 conductors, the insulation layers of the first main line core, the second main line core, the control line core and the ground wire are all low-temperature resistant insulating materials, and the outer sheath is made of polylaurolactam.

6. The temperature-measurable liquid-cooled charging cable according to claim 5, characterized in that: The support frame is a PE support frame.

7. The temperature-measurable liquid-cooled charging cable according to claim 6, characterized in that: The four ends of the support frame are all provided with arc-shaped support pieces.

8. The temperature-measurable liquid-cooled charging cable according to claim 7, characterized in that: The support frame is provided with a through hole, and the temperature measuring unit is embedded in the through hole.

9. A production process for a temperature-measurable liquid-cooled charging cable, used to produce a temperature-measurable liquid-cooled charging cable as claimed in any one of claims 1 to 8, characterized in that: The following steps are included A. Main line core production: Select Category 6 conductors as the main conductor materials for the first and second main line cores, extrude and draw the Category 6 conductors into fan-shaped strips, extrude low-temperature resistant insulation materials on the processed fan-shaped main conductors, and install temperature measuring units near the charging pile and the charging gun on the first and second main line cores respectively; B. Production of control wire group: twist six control wire cores and one temperature measuring wire core, braid shield on the twisted control wire group, and extrude the control wire core insulation layer outside the braided shield layer; C. Ground wire production: Select Category 6 conductors as the conductor material of the ground wire, and then extrude low-temperature resistant insulating materials on the conductor to form the ground wire; D. Support frame preparation: The support frame is processed into a cross-shaped structure by injection molding, and the ends of its limbs are arc-shaped support pieces; E. Cable assembly: Place the prepared first main line core, control line group, second main line core and ground line in the four fan-shaped channels divided by the support frame respectively. The fan-shaped cross-sections of the first main line core and the second main line core just fill the corresponding fan-shaped channels. A through hole for embedding the temperature measuring unit on the main line core is opened at the end of the support frame, and the temperature measuring unit on the main line core is embedded. The temperature measuring unit is connected to the temperature measuring core of the control line group through a wire. F. Wrap a layer of PP tape on the surface of the assembled cable body, directly use the gap between the insulation layer of the control wire group and the support frame as the liquid inlet channel, and use the gap between the ground wire and the support frame as the liquid discharge channel; H. Extrusion of outer sheath: Polylaurolactam is selected as the outer sheath material, the assembled cable body is sent to the extruder, and the polylaurolactam is evenly extruded on the outside of the cable body to form the outer sheath by the extruder.

10. A production process for a temperature-measurable liquid-cooled charging cable according to claim 9, characterized in that: The support frame is made of PE or PPS material.

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