Low-temperature charging cable
By placing the signal wire group in the center, multiple conductors at the edge in the charging cable, and using polyimide insulation layer and thermal glue, the heating and service life problems of the charging cable are solved, and the low-temperature charging cable is realized Rapid cooling and stable performance reduce usage costs and maintenance requirements.
Patent Information
- Application Number
- CN202420848871.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The high current charging of new energy vehicles causes the charging cable to heat up, affecting the service life, and the existing liquid-cooled cables need regular maintenance and there is a risk of liquid leakage. The increase in the diameter of the conductor causes the cable to be too heavy and inconvenient for operation, and the charging performance is not available after long-term use. Stablize.
Design a low-temperature charging cable with the signal line set in the center and multiple conductors on the edge. It uses polyimide insulating layer and braided layer, and thermally conductive glue fills the conductor gap. The sheath layer is made of polyurethane to avoid regular maintenance needs. Reduce heat dissipation, improve service life and operation convenience.
It achieves rapid cooling under high current charging, extends service life, reduces usage costs, improves charging performance stability and customer experience, avoids conductor breakage, and does not require regular maintenance.
Smart Images
Figure CN222213767U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cable manufacturing, and in particular to a low-temperature charging cable. Background Art
[0002] With the development of the new energy field, new energy vehicles have gradually become popular and become one of the ways for people to travel. The charging speed of new energy vehicles has also become a concern. New energy vehicles on the market use high-current charging to speed up the charging speed. High-current charging will cause the charging cables of new energy vehicles to generate a lot of heat. Long-term high-current charging will affect the service life of the charging cables. In order to solve the problem of excessive heat generation of charging cables, on the one hand, liquid-cooled cables are introduced on the market, that is, by filling coolant inside the charging cable to cool the charging cable, but in order to ensure the cooling effect, the coolant inside the charging cable needs to be regularly replaced, that is, the charging cable needs to be regularly maintained, and if cracks appear on the outer layer of the charging cable, there will be a risk of leakage, which is not only costly to use, but also has certain risks of use.
[0003] On the other hand, the market has increased the diameter of the conductor to allow the charging cable to pass large currents. However, the overall outer diameter of the charging cable is large, and the overall weight is too heavy, which is inconvenient for customers to operate. At the same time, the conductor copper wire is prone to breakage. After long-term use, the charging performance is unstable.
[0004] Therefore, there is an urgent need for a low-temperature charging cable to solve the above technical problems. Utility Model Content
[0005] The purpose of the utility model is to provide a low-temperature charging cable, which can quickly cool down when charging with a large current, does not need to be filled with coolant inside, does not require regular maintenance, has low cost of use, has a small overall outer diameter, is easy to operate, and the internal copper wire will not break when bent for a long time, and has stable charging performance.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A low-temperature charging cable, comprising:
[0008] Signal line set;
[0009] A shielding layer, covering the outer periphery of the signal line group;
[0010] A plurality of conductors are arranged around the shielding layer;
[0011] a non-woven fabric layer, the non-woven fabric layer being wound around the outer circumferences of the plurality of conductors;
[0012] The sheath layer is sleeved on the outer periphery of the non-woven fabric layer.
[0013] As an optimal technical solution for the low-temperature charging cable, the conductor includes a conductor core and an insulating layer, the insulating layer is coated on the outer circumference of the conductor core, and the insulating layer is made of polyimide.
[0014] As a preferred technical solution for the low-temperature charging cable, the conductor further includes a braided layer, and the braided layer is arranged between the conductor core and the insulating layer.
[0015] As a preferred technical solution for the low-temperature charging cable, the braiding density of the braided layer is ≥80%.
[0016] As a preferred technical solution for the low-temperature charging cable, the insulating layer is formed by wrapping a polyimide tape around the conductor core.
[0017] As a preferred technical solution for the low-temperature charging cable, two polyimide tapes are provided, and the two polyimide tapes are spirally wound around the outer circumference of the plurality of guide cores in opposite directions.
[0018] As a preferred technical solution for the low-temperature charging cable, the plurality of conductors are divided into positive wires and negative wires, and the polyimide tapes covering the outer circumferences of the positive wires and the negative wires are different in color.
[0019] As a preferred technical solution of the low-temperature charging cable, the low-temperature charging cable further includes a thermally conductive adhesive, and the thermally conductive adhesive is filled in the gaps between the plurality of conductors.
[0020] As an optimal technical solution for low-temperature charging cables, the sheath layer is made of polyamide.
[0021] As a preferred technical solution for the low-temperature charging cable, the signal wire group includes a plurality of signal wires, and the plurality of signal wires are twisted together.
[0022] The beneficial effects of the utility model are:
[0023] The low-temperature charging cable provided by the utility model places a signal line group at the center of the low-temperature charging cable and places multiple conductors at the edge. Since the outer diameter of the signal line group is small, it has good bending properties. Even if the low-temperature charging cable is bent for a long time, the copper wires in the signal line group and the copper wires in the edge conductors will not break, which can not only ensure the stable charging performance of the low-temperature charging cable, but also extend its service life and improve the customer's usage experience; the conductor is located at the edge of the low-temperature charging cable. When the low-temperature charging cable is charged, compared with the prior art that sets the conductor in the middle position, the conductor is placed at the edge, and the conductor is closer to the external environment, so that the heat generated by the conductor can be dissipated to the external environment faster, thereby realizing rapid cooling of the low-temperature charging cable. Compared with the liquid-cooled cable in the prior art, it does not require regular maintenance and has a low cost of use; multiple conductors are provided, and the multiple conductors can achieve the effect of shunting the charging current, thereby dissipating the heat of the conductor, thereby reducing the heat of the low-temperature charging cable when it is working. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural schematic diagram of the low-temperature charging cable provided by the utility model;
[0025] Figure 2 This is a preparation flow chart of the low-temperature charging cable provided by the utility model.
[0026] In the figure:
[0027] 1. Signal line group; 2. Shielding layer; 3. Conductor; 31. Core guide; 32. Insulation layer; 33. Braided layer; 4. Non-woven fabric layer; 5. Sheath layer. DETAILED DESCRIPTION
[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0031] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0032] Embodiment 1
[0033] This embodiment provides a low-temperature charging cable, such as Figure 1 As shown, it includes a signal line group 1, a shielding layer 2, multiple conductors 3, a non-woven fabric layer 4 and a sheath layer 5, wherein the signal line group 1 is located at the center of the low-temperature charging cable, the shielding layer 2 is coated on the periphery of the signal line group 1, and multiple conductors surround the periphery of the shielding layer 2. The shielding layer 2 is arranged between the signal line group 1 and the conductor 3. When the low-temperature charging cable is charging, the shielding layer 2 can shield the current flowing in the conductor 3 from interfering with the signal line group 1, thereby effectively ensuring that the low-temperature charging cable has good communication performance.
[0034] When the low-temperature charging cable is bent during use, the bending degree at the center is larger and the bending degree at the edge is smaller. The signal line group 1 is placed in the center of the low-temperature charging cable, and multiple conductors 3 are placed at the edge. Since the signal line group 1 has a small outer diameter, it has good bending properties. Even if the low-temperature charging cable is bent for a long time, the copper wires in the signal line group 1 and the copper wires in the edge conductors 3 will not break. This not only ensures the stable charging performance of the low-temperature charging cable, but also extends its service life, while also improving the customer's usage experience.
[0035] Since the conductor 3 is located at the edge of the low-temperature charging cable, when the low-temperature charging cable is charging, compared with the prior art that places the conductor 3 in the middle, placing the conductor 3 at the edge makes the conductor 3 closer to the external environment, which can dissipate the heat generated by it to the external environment more quickly, thereby achieving rapid cooling of the low-temperature charging cable. Compared with the liquid-cooled cable in the prior art, it does not require regular maintenance and has a low cost of use. Since multiple conductors 3 are provided, multiple conductors 3 can achieve the effect of shunting the charging current, while ensuring that each conductor 3 generates its own heat, the heat of the conductor 3 can also be dispersed, thereby further reducing the heat of the low-temperature charging cable during operation. Moreover, compared with the single conductor 3 in the prior art, multiple conductors 3 have a larger heat dissipation area and a faster cooling rate.
[0036] The non-woven fabric layer 4 is wrapped around the outer periphery of the multiple conductors 3, which can achieve the purpose of binding the multiple conductors 3 and prevent the multiple conductors 3 from being loosely arranged in the low-temperature charging cable, making the low-temperature charging cable more compact and having a lower outer diameter, which is convenient for customers to operate. The sheath layer 5 is sleeved on the outer periphery of the tape layer, which can make the low-temperature charging cable have certain flame retardancy and extrusion resistance.
[0037] The conductor 3 includes a conductor core 31 and an insulating layer 32 wrapped around the outer periphery of the conductor core 31. The insulating layer 32 is made of polyimide. The polyimide material has good high temperature resistance and low temperature resistance, so that the conductor 3 can adapt to changes in the external environment. The insulating layer 32 will not spontaneously combust in high temperature environments and high heat environments, and the insulating layer 32 will not crack in low temperature environments. At the same time, the polyimide material has a low smoke rate and is non-toxic. Even if the low-temperature charging cable burns, it will not release a large amount of toxic smoke, which can ensure that residents have a certain amount of escape time.
[0038] Preferably, the conductor 3 further includes a braided layer 33, which is disposed between the conductor core 31 and the insulating layer 32. By adding the braided layer 33 on the outer periphery of the conductor 3, the roundness of the conductor 3 can be improved, and the situation where the copper wire in the conductor core 31 pierces the insulating layer 32 due to wire skipping can be avoided, thereby increasing the service life of the conductor 3. In this embodiment, the braiding density of the braided layer 33 is preferably ≥80%, so as to effectively protect the insulating layer 32 and facilitate the processing of the conductor 3.
[0039] Preferably, the insulating layer 32 is formed by winding a polyimide tape around the conductor core 31, wherein two polyimide tapes are provided, and the two polyimide tapes are spirally wound around the outer circumference of the conductor core 31 in opposite directions. When one polyimide tape is wound around the conductor core 31, the other polyimide tape is wound around the opposite direction, and the gap around the first polyimide tape can be wrapped, thereby improving the insulation of the conductor 3, avoiding leakage of the conductor core 31, and reducing the risk of spontaneous combustion of the low-temperature charging cable.
[0040] The multiple conductors 3 are divided into positive wires and negative wires. To facilitate the distinction between the positive wires and the negative wires, in this embodiment, the polyimide tapes wrapped around the outer periphery of the positive wires and the negative wires are different in color. In this way, if the low-temperature charging cable is used abnormally, it is easy for the staff to identify the type of wires and facilitate the staff to repair them later.
[0041] Preferably, the low-temperature charging cable also includes a thermally conductive adhesive. In actual production, the thermally conductive adhesive is filled in the gaps between the multiple conductors 3. When the low-temperature charging cable is working, the heat of the positive wire in the conductor 3 is high, and the heat of the negative wire in the conductor 3 is low. The setting of the thermally conductive adhesive can transfer the heat of the positive wire in the conductor 3 to the negative wire, so that the multiple conductors 3 are heated evenly, further improving the stability of the low-temperature charging cable during use. Regarding the selection of thermally conductive adhesive, liquid silicone can be selected, and other colloids can also be selected, without specific restrictions.
[0042] Preferably, the sheath layer 5 is made of polyurethane material. Since the polyurethane material has good wear resistance and low temperature resistance, it can not only ensure the service life of the low-temperature charging cable, but also prevent the sheath layer 5 from cracking when the temperature is low, thus ensuring the quality of the low-temperature charging cable. At the same time, the polyurethane material also has good tensile strength and bendability, which makes it easier for customers to use the low-temperature charging cable, thereby further improving the customer's experience.
[0043] In this embodiment, the signal line group 1 includes multiple signal lines, and the multiple signal lines are twisted together. This can improve the tensile strength of the signal line group 1, prevent the signal lines from breaking, and improve the stability of the signal during the use of the low-temperature charging cable, so that customers can understand the status of the low-temperature charging cable and the matching equipment in real time, thereby improving the customer's usage experience.
[0044] Embodiment 2
[0045] This embodiment provides a preparation method for preparing the low-temperature charging cable in Embodiment 1, such as Figure 2 As shown, the preparation steps include:
[0046] Step 1: Wrap the shielding layer 2 around the periphery of the signal line group 1 to prevent the signal transmitted by the signal line group 1 from being interfered by external electromagnetic or current interference, and ensure the stability of signal transmission during the use of the low-temperature charging cable.
[0047] Step 2: Drawing the copper wire into copper wire. Specifically, the staff assembles the copper wire to the designated position of the drawing machine, and operates the drawing machine to draw the copper wire into copper wire. The diameter of the copper wire is about 0.2mm.
[0048] Step 3: twisting a plurality of copper wire bundles into a plurality of guide cores 31. Specifically, twisting a plurality of copper wires together to form a guide core 31 with a standard radial dimension, and repeating the copper wire twisting process to form a plurality of guide cores 31.
[0049] Step 4: Wrap the insulating layer 32 around the outer periphery of the conductor core 31 to form the conductor 3.
[0050] Step 5: surround the signal line group 1 with multiple conductors 3, and wrap the non-woven fabric around the outer periphery of the multiple conductors 3 to form a non-woven fabric layer 4. The multiple conductors 3 surround the signal line group 1, which can transfer the heat generated by the conductors 3 to the external environment faster and accelerate the heat dissipation of the conductors 3. The provision of the non-woven fabric layer 4 can prevent the multiple conductors 3 from loosening, thereby improving the roundness of the low-temperature charging cable.
[0051] Step 6: Extruding and coating the sheath material on the periphery of the non-woven fabric layer 4 to form the sheath layer 5 . The staff extrude the sheath material and coat it on the periphery of the non-woven fabric layer 4 through an extruder.
[0052] In this embodiment, the following step is also included between step 3 and step 4, in which a braided layer 33 is coated on the outer periphery of the conductor core 31. This not only makes the conductor 3 more round, but also prevents the copper wire in the conductor core 31 from being inserted into the insulating layer 32, thereby improving the overall safety of the conductor 3.
[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A low-temperature charging cable, characterized in that: include: Signal line set (1); A shielding layer (2) covering the outer periphery of the signal line group (1); A plurality of conductors (3) are arranged around the shielding layer (2); a non-woven fabric layer (4), the non-woven fabric layer (4) being wound around the outer circumference of the plurality of conductors (3); The sheath layer (5) is sleeved on the outer periphery of the non-woven fabric layer (4).
2. The low-temperature charging cable according to claim 1, characterized in that: The conductor (3) comprises a conductor core (31) and an insulating layer (32); the insulating layer (32) is coated on the outer periphery of the conductor core (31); and the insulating layer (32) is made of polyimide.
3. The low-temperature charging cable according to claim 2, characterized in that: The conductor (3) further comprises a braided layer (33), wherein the braided layer (33) is arranged between the conductor core (31) and the insulating layer (32).
4. The low-temperature charging cable according to claim 3, characterized in that: The braiding density of the braided layer (33) is ≥80%.
5. The low-temperature charging cable according to claim 2, characterized in that: The insulating layer (32) is formed by wrapping a polyimide tape around the conductor core (31).
6. The low-temperature charging cable according to claim 5, characterized in that: Two polyimide tapes are provided, and the two polyimide tapes are spirally wound around the outer circumferences of the plurality of guide cores (31) in opposite directions.
7. The low-temperature charging cable according to claim 5, characterized in that: The plurality of conductors (3) are divided into positive electrode wires and negative electrode wires, and the polyimide tapes covering the outer circumferences of the positive electrode wires and the negative electrode wires have different colors.
8. The low-temperature charging cable according to claim 1, characterized in that: The low-temperature charging cable also includes a thermally conductive adhesive, which is filled in the gaps between the plurality of conductors (3).
9. The low-temperature charging cable according to claim 1, characterized in that: The sheath layer (5) is made of polyamide.
10. The low-temperature charging cable according to claim 1, characterized in that: The signal line group (1) comprises a plurality of signal lines, and the plurality of signal lines are twisted together.