Device and method for preparing charging cable for new energy vehicle and cable prepared therefrom

Abstract

The present invention relates to the field of cable preparation technology, and in particular to a preparation device and method for a new energy vehicle charging cable and a cable prepared therefrom, wherein the preparation device comprises a primary cooling trough, a scraping mechanism, a rotating mechanism, a secondary cooling trough, a bundling mechanism, a primary dragging mechanism, a pressure sensor, and a central control module, wherein the central control module determines the initial working mode of each component according to the diameter of the inner core of the cable. The present invention increases the bending degree and the number of bending times that the charging cable can withstand by arranging spirally arranged aramid fibers in the cable, and at the same time, evaluates the cooling condition of the inner rubber after passing through the primary cooling trough by detecting the resistance of the inner rubber when scraping the edges during the manufacturing process, thereby ensuring that the edges scraped by the scraping mechanism are smooth and neat, satisfying the perfect attachment of the aramid fibers, ensuring the tightness between the aramid fibers and the inner rubber, and thus ensuring the bending times that the charging cable can withstand.

Description

Technical Field

[0001] The present invention relates to the technical field of cable preparation, and in particular to a device and method for preparing a new energy vehicle charging cable and a cable prepared thereby. Background Art

[0002] Electric vehicles (BEV) refer to vehicles that use on-board power as power, use motors to drive wheels, and meet the requirements of road traffic and safety regulations. Because the impact on the environment is relatively small compared to traditional vehicles, its prospects are widely optimistic. The working principle of its energy transmission is: battery-current-power regulator-motor-power transmission system-drive the vehicle. The speed and starting speed of pure electric vehicles depend on the power and performance of the drive motor. The length of its continuous driving range depends on the capacity of the on-board power battery. The weight of the on-board power battery depends on the type of power battery used, such as lead-acid, zinc-carbon, lithium battery, etc. They vary in size, specific gravity, specific power, specific energy, and cycle life. This depends on the manufacturer's positioning and use of the vehicle grade, as well as market definition and market segmentation. Electric vehicles are charged by connecting a charging cable to a charging device (generally a charging pile). The charging cable includes an AC charging cable and a DC charging cable.

[0003] Chinese Patent Publication No.: CN111469684A. A charging cable is disclosed, which has a rectifier and a first connecting element and a second connecting element, wherein the first connecting element is designed to be connected to a power source outside the vehicle, and the second connecting element is designed to be connected to a charging socket of a motor vehicle having an electric power storage device, wherein the alternating current fed into the first connecting element can be converted into a direct current that can be output on the second connecting element by the rectifier, wherein the first connecting element is detachably fastened to the charging cable through an interface of the charging cable.

[0004] Car charging cables are subject to more dragging and bending during use than traditional cables. Currently produced cables are prone to damage during the bending process, so there is an urgent need for a bending-resistant charging cable and its preparation equipment. Summary of the invention

[0005] To this end, the present invention provides a device and method for preparing an automobile charging cable and a cable prepared therefrom, so as to overcome the problem in the prior art that the cables currently produced are prone to damage during the bending process.

[0006] To achieve the above object, the present invention provides a device for preparing a new energy vehicle charging cable, comprising:

[0007] A primary cooling tank is used to cool the inner core of the cable covered with an inner layer of rubber;

[0008] The scraping mechanism is used to scrape the inner rubber layer passing through the primary cooling groove, so that the inner rubber layer surface forms grooves that are easy to cover; different specifications of scraping mechanisms are set for cable cores with different diameters;

[0009] A rotating mechanism connected to the scraping mechanism to drive the scraping mechanism to rotate;

[0010] Secondary cooling tank, used to cool the inner rubber layer after scraping;

[0011] A binding mechanism, used for binding and attaching the aramid fiber to the groove of the inner rubber layer;

[0012] The primary dragging mechanism is arranged between the scraping mechanism and the secondary cooling tank, and is used to drag the cable inner core coated with the inner layer of rubber after the scraping is completed.

[0013] The scraping mechanism is provided with a pressure sensor laterally, which can detect the resistance encountered during scraping;

[0014] The central control module is respectively connected to the primary cooling trough, the scraping mechanism, the rotating mechanism, the secondary cooling trough, the bundling mechanism, and the primary dragging mechanism. The central control module determines the initial working mode of each component according to the diameter of the cable inner core, and determines whether to adjust the temperature of the primary cooling trough according to the data detected by the pressure sensor. However, when adjusting the temperature of the primary cooling trough alone cannot ensure that the data detected by the pressure sensor is within the preset range, the central control module adjusts the dragging speed of the primary dragging mechanism to ensure that the data detected by the pressure sensor is within the preset range.

[0015] Furthermore, the pressure sensor detects the pressure value in real time and transmits the detection result to the central control module.

[0016] If the detected pressure value is within the standard pressure range, the central control module determines that there is no need to adjust the working state of each component;

[0017] If the detected pressure value is not within the standard pressure range, the central control module determines that the working state of each component needs to be adjusted.

[0018] Furthermore, if the detected pressure value is not within the standard pressure range and is less than the standard pressure range, the central control module determines that the cable core coated with the inner layer rubber is insufficiently cooled in the primary cooling tank, and the central control module controls the primary cooling tank to cool down, thereby increasing the cooling efficiency of the inner layer rubber.

[0019] Furthermore, if the detected pressure value is not within the standard pressure range and is greater than the standard pressure range, the central control module determines that the cable core coated with the inner layer rubber is over-cooled in the primary cooling tank, and the central control module controls the temperature of the primary cooling tank to reduce the cooling efficiency of the inner layer rubber.

[0020] Furthermore, a minimum cooling temperature is set in the primary cooling tank. If the pressure value detected under the minimum cooling temperature condition is still lower than the standard pressure range, the central control module adjusts the dragging speed of the primary dragging mechanism to reduce the dragging speed of the primary dragging mechanism so as to prolong the cooling time of the cable core coated with the inner layer of rubber in the primary cooling tank, and adjusts the rotation speed of the rotating mechanism at the same time.

[0021] Furthermore, a maximum cooling temperature is set in the primary cooling tank. If the pressure value detected under the maximum cooling temperature condition is still greater than the standard pressure range, the central control module adjusts the dragging speed of the primary dragging mechanism to increase the dragging speed of the primary dragging mechanism to reduce the cooling time of the cable core coated with the inner layer of rubber in the primary cooling tank, and adjusts the rotation speed of the rotating mechanism at the same time.

[0022] Furthermore, for cable cores of different diameters, the thickness of the inner rubber coating is different, the basic cooling temperature and basic cooling time of the first-level cooling trough are different, and the pressure ranges set therefor are also different.

[0023] Furthermore, the basic cooling temperature of the primary cooling groove is inversely proportional to the thickness of the inner rubber layer, and the basic cooling time of the primary cooling groove is directly proportional to the thickness of the inner rubber layer.

[0024] The present invention also discloses a method for preparing a new energy vehicle charging cable, which is applied to a preparation device for the new energy vehicle charging cable, comprising:

[0025] Step S1, determining the thickness of the inner rubber layer coated on the inner core of the cable to be processed;

[0026] Step S2, determining the basic cooling temperature and basic cooling time of the primary cooling tank according to the thickness of the inner rubber layer;

[0027] Step S3, judging whether to adjust the basic cooling temperature of the primary cooling tank according to the value detected by the pressure sensor located at the scraping mechanism;

[0028] Step S4, if the value detected by the pressure sensor is still not within the standard range after the adjustment in step S3, the basic cooling time of the primary cooling tank is adjusted, and the rotation speed of the rotating mechanism is adjusted at the same time;

[0029] Step S5, secondary cooling the inner layer rubber after scraping;

[0030] Step S6, bundling and attaching the aramid fibers to the grooves of the inner rubber layer;

[0031] Step S7, covering the inner rubber layer with the aramid fiber by the outer rubber layer.

[0032] The present invention also discloses a new energy vehicle charging cable, which is prepared according to the preparation method of the new energy vehicle charging cable, comprising a cable inner core, an inner rubber layer, an aramid fiber belt, and an outer rubber layer, wherein:

[0033] The inner rubber layer is coated on the inner core of the cable, and a thread-shaped groove is arranged on the surface of the inner rubber layer;

[0034] The aramid fiber belt is used to bind the inner rubber layer through the thread-shaped grooves;

[0035] The outer rubber layer is coated on the inner rubber layer which is bound with the aramid fiber belt.

[0036] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention increases the bending degree and the number of bending times that the charging cable can withstand by arranging spirally arranged aramid fibers in the cable, and at the same time, by detecting the resistance encountered by the inner rubber when scraping the edges during the manufacturing process, the cooling condition of the inner rubber after passing through the primary cooling groove is evaluated, thereby ensuring that the edges scraped by the scraping mechanism are smooth and neat, meeting the perfect attachment of the aramid fibers, ensuring the tightness between the aramid fibers and the inner rubber, and thus ensuring the bending degree and the number of bending times that the charging cable can withstand.

[0037] Furthermore, when the detected pressure value is less than the standard pressure range, it is easy to scrape off more inner rubber, and the grooves are easily not formed during the scraping process, so that the aramid fiber cannot be well attached to the inner rubber, and there is a gap in the middle of the attachment. When the detected pressure value is greater than the standard pressure range, it is easy to scrape off less inner rubber, so that the aramid fiber cannot be well attached to the inner rubber, and the aramid fiber is easy to slide with the inner rubber. Therefore, when the pressure value is not within the standard pressure range, the working conditions between the various parts are adjusted to ensure the tightness between the aramid fiber and the inner rubber, thereby ensuring the number of bendings that the charging cable can withstand.

[0038] Furthermore, the detected pressure value is not within the standard pressure range and is lower than the standard pressure range, indicating that the primary cooling groove at this time does not cool down the inner rubber sufficiently, and the inner rubber after passing through the primary cooling groove cannot be well formed. Therefore, when the detected pressure value is lower than the standard pressure range, the temperature of the primary cooling groove is lowered to ensure that the inner rubber can be formed in the primary cooling groove, thereby facilitating the scraping mechanism to reasonably scrape the inner rubber, thereby ensuring the tightness between the aramid fiber and the inner rubber, thereby ensuring the number of bendings that the charging cable can withstand.

[0039] Furthermore, the detected pressure value is not within the standard pressure range and is greater than the standard pressure range, indicating that the primary cooling groove at this time cools down the inner rubber excessively. The inner rubber that has passed through the primary cooling groove is over-cooled and it is not easy for the scraping mechanism to scrape the inner rubber. Therefore, in the case where the detected pressure value is higher than the standard pressure range, the temperature of the primary cooling groove is increased, thereby reducing the degree to which the inner rubber can be cooled in the primary cooling groove, thereby facilitating the scraping mechanism to reasonably scrape the inner rubber, thereby ensuring the tightness between the aramid fiber and the inner rubber, thereby ensuring the number of bendings that the charging cable can withstand.

[0040] Furthermore, when the cooling temperature of the primary cooling tank is adjusted to the lowest, if the cooling demand is still not met at this time, the dragging speed of the primary dragging mechanism is adjusted. By reducing the dragging speed of the primary dragging mechanism, the cooling time of the cable core coated with the inner rubber layer in the primary cooling tank is prolonged, thereby ensuring that the inner rubber layer can be formed in the primary cooling tank, and then facilitating the scraping mechanism to reasonably scrape the inner rubber layer, thereby ensuring the tightness between the aramid fiber and the inner rubber layer, thereby ensuring the number of bendings that the charging cable can withstand.

[0041] Furthermore, when the cooling temperature of the primary cooling tank is adjusted to the highest, if it is still over-cooled at this time, the dragging speed of the primary dragging mechanism is adjusted. By accelerating the dragging speed of the primary dragging mechanism, the cooling time of the cable core coated with the inner rubber in the primary cooling tank is shortened, thereby reducing the cooling degree of the inner rubber in the primary cooling tank, and then facilitating the scraping mechanism to reasonably scrape the inner rubber, thereby ensuring the tightness between the aramid fiber and the inner rubber, thereby ensuring the number of bendings that the charging cable can withstand.

[0042] Furthermore, for the cable core with a larger diameter, it is coated with a thicker inner layer of rubber. The basic cooling temperature and basic cooling time of the primary cooling tank are adjusted by the thickness of the inner layer of rubber, thereby ensuring that the inner layer of rubber can be formed in the primary cooling tank, and then facilitating the scraping mechanism to reasonably scrape the inner layer of rubber, thereby ensuring the tightness between the aramid fiber and the inner layer of rubber, thereby ensuring the number of bending times that the charging cable can withstand.

[0043] Furthermore, by adding an outer layer of rubber outside the inner layer of rubber and aramid fiber, the tightness between the aramid fiber and the inner layer of rubber is ensured, thereby ensuring the number of bending times that the charging cable can withstand. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic top view of a device for preparing a new energy vehicle charging cable in an embodiment of the present invention;

[0045] Figure 2 Schematic diagram of a process for preparing a new energy vehicle charging cable in an embodiment of the present invention;

[0046] Figure 3 Schematic diagram of the structure of a charging cable prepared in an embodiment of the present invention;

[0047] Figure 4 Schematic diagram of the bending experiment equipment in the embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0050] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0051] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] See also Figure 1 As shown, Figure 1 It is a schematic top view of a device for preparing a new energy vehicle charging cable in an embodiment of the present invention;

[0053] The present invention provides a device for preparing a new energy vehicle charging cable, comprising:

[0054] The primary cooling tank 1 is used to cool the inner core of the cable covered with the inner rubber layer 72;

[0055] The scraping mechanism 2 is used to scrape the inner rubber layer passing through the primary cooling groove, so that the inner rubber layer 72 is formed with an edge groove 77 that is easy to cover; different specifications of scraping mechanisms are set for cable cores with different diameters;

[0056] A rotating mechanism 3, which is connected to the scraping mechanism and is used to drive the scraping mechanism 2 to rotate;

[0057] The secondary cooling tank 4 is used to cool the inner rubber layer 72 after the scraping process;

[0058] The binding mechanism 9 is used to bind and attach the aramid fiber to the rib groove 77 of the inner rubber layer 72;

[0059] The primary dragging mechanism 5 is arranged between the scraping mechanism 2 and the secondary cooling tank 4, and is used to drag the cable inner core coated with the inner layer of rubber after the scraping is completed.

[0060] The scraping mechanism is laterally provided with a pressure sensor 6, which can detect the resistance encountered during scraping;

[0061] The central control module is respectively connected to the primary cooling trough, the scraping mechanism, the rotating mechanism, the secondary cooling trough, the bundling mechanism, and the primary dragging mechanism. The central control module determines the initial working mode of each component according to the diameter of the cable inner core, and determines whether to adjust the temperature of the primary cooling trough according to the data detected by the pressure sensor. However, when adjusting the temperature of the primary cooling trough alone cannot ensure that the data detected by the pressure sensor is within the preset range, the central control module adjusts the dragging speed of the primary dragging mechanism to ensure that the data detected by the pressure sensor is within the preset range.

[0062] The present invention increases the tolerable bending degree and the number of bending times of the charging cable by arranging spirally arranged aramid fibers in the cable, and at the same time evaluates the cooling condition of the inner rubber after passing through the primary cooling groove by detecting the resistance encountered by the inner rubber when scraping the edges during the manufacturing process, thereby ensuring that the edges scraped by the scraping mechanism are smooth and neat, meeting the perfect attachment of the aramid fibers, ensuring the tightness between the aramid fibers and the inner rubber, and thus ensuring the tolerable bending degree and the number of bending times of the charging cable.

[0063] Specifically, the pressure sensor detects the pressure value A in real time and transmits the detection result to the central control module.

[0064] If the detected pressure value is within the standard pressure range, the central control module determines that there is no need to adjust the working state of each component;

[0065] If the detected pressure value is not within the standard pressure range, the central control module determines that the working state of each component needs to be adjusted.

[0066] The central control module is set with a standard pressure range [a1, a2], where a1 is the minimum value of the standard pressure range and a2 is the maximum value of the standard pressure range. If a1≤A≤a2, the detected pressure value is within the standard pressure range; if A<a1 or A>a2, the detected pressure value is not within the standard pressure range.

[0067] When the detected pressure value is smaller than the standard pressure range, it is easy to scrape off more inner rubber, and the grooves are easily not formed in the scraping process, so that the aramid fiber cannot be well attached to the inner rubber, and there is a gap in the middle of the attachment. When the detected pressure value is larger than the standard pressure range, it is easy to scrape off less inner rubber, so that the aramid fiber cannot be well attached to the inner rubber, and the aramid fiber is easy to slide with the inner rubber. Therefore, when the pressure value is not within the standard pressure range, the working conditions between the various parts are adjusted to ensure the tightness between the aramid fiber and the inner rubber, thereby ensuring the number of bendings that the charging cable can withstand.

[0068] Specifically, if the detected pressure value is not within the standard pressure range and is lower than the standard pressure range, the central control module determines that the inner core of the cable coated with the inner layer rubber is insufficiently cooled in the primary cooling tank. The central control module controls the primary cooling tank to cool down and increase the cooling efficiency of the inner layer rubber.

[0069] The initial temperature of the first-stage cooling tank is S, and the temperature after cooling is S'.

[0070] S'=S-(a1-A)×b1

[0071] Among them, b1 is the calculation compensation parameter for reducing the temperature of the first-stage cooling tank.

[0072] The detected pressure value is not within the standard pressure range and is lower than the standard pressure range, indicating that the primary cooling groove at this time does not cool down the inner rubber sufficiently, and the inner rubber after passing through the primary cooling groove cannot be well formed. Therefore, when the detected pressure value is lower than the standard pressure range, the temperature of the primary cooling groove is lowered to ensure that the inner rubber can be formed in the primary cooling groove, thereby facilitating the scraping mechanism to scrape the inner rubber reasonably, thereby ensuring the tightness between the aramid fiber and the inner rubber, thereby ensuring the number of bendings that the charging cable can withstand.

[0073] Specifically, if the detected pressure value is not within the standard pressure range and is greater than the standard pressure range, the central control module determines that the cable core coated with an inner layer of rubber is over-cooled in the primary cooling tank. The central control module controls the temperature of the primary cooling tank to increase, reducing the cooling efficiency of the inner layer of rubber.

[0074] The initial temperature of the first-stage cooling tank is S, and the temperature after temperature adjustment is S", set

[0075] S”=S+(A-a2)×b2

[0076] Among them, b2 is the calculation compensation parameter for increasing the temperature of the first-stage cooling tank.

[0077] The detected pressure value is not within the standard pressure range and is greater than the standard pressure range, indicating that the primary cooling groove at this time cools down the inner rubber excessively. The inner rubber that has passed through the primary cooling groove is over-cooled and it is not easy for the scraping mechanism to scrape the inner rubber. Therefore, when the detected pressure value is higher than the standard pressure range, the temperature of the primary cooling groove is increased to reduce the degree to which the inner rubber can be cooled in the primary cooling groove, thereby facilitating the scraping mechanism to scrape the inner rubber reasonably, thereby ensuring the tightness between the aramid fiber and the inner rubber, thereby ensuring the number of bendings that the charging cable can withstand.

[0078] Specifically, a minimum cooling temperature is set in the primary cooling tank. If the pressure value detected under the minimum cooling temperature condition is still lower than the standard pressure range, the central control module adjusts the dragging speed of the primary dragging mechanism to reduce the dragging speed of the primary dragging mechanism so as to prolong the cooling time of the cable core coated with the inner layer of rubber in the primary cooling tank, and adjusts the rotation speed of the rotating mechanism at the same time.

[0079] When the cooling temperature of the primary cooling tank is adjusted to the lowest, if the cooling demand is still not met at this time, the dragging speed of the primary dragging mechanism is adjusted. By reducing the dragging speed of the primary dragging mechanism, the cooling time of the cable core coated with the inner rubber layer in the primary cooling tank is prolonged, thereby ensuring that the inner rubber layer can be formed in the primary cooling tank, and then facilitating the scraping mechanism to reasonably scrape the inner rubber layer, thereby ensuring the tightness between the aramid fiber and the inner rubber layer, thereby ensuring the number of bendings that the charging cable can withstand.

[0080] Specifically, a maximum cooling temperature is set in the primary cooling tank. If the pressure value detected under the maximum cooling temperature condition is still greater than the standard pressure range, the central control module adjusts the dragging speed of the primary dragging mechanism to increase the dragging speed of the primary dragging mechanism to reduce the cooling time of the cable core coated with the inner layer of rubber in the primary cooling tank, and adjusts the rotation speed of the rotating mechanism at the same time.

[0081] When the cooling temperature of the primary cooling tank is adjusted to the highest, if it is still over-cooled at this time, the dragging speed of the primary dragging mechanism is adjusted. By speeding up the dragging speed of the primary dragging mechanism, the cooling time of the cable core coated with the inner rubber in the primary cooling tank is shortened, thereby reducing the cooling degree of the inner rubber in the primary cooling tank, and then facilitating the scraping mechanism to reasonably scrape the inner rubber, thereby ensuring the tightness between the aramid fiber and the inner rubber, thereby ensuring the number of bendings that the charging cable can withstand.

[0082] Specifically, for cable cores of different diameters, the thickness of the inner rubber coating is different, the basic cooling temperature and basic cooling time of the first-level cooling trough are different, and the pressure ranges set therefor are also different.

[0083] Specifically, the basic cooling temperature of the primary cooling groove is inversely proportional to the thickness of the inner rubber layer, and the basic cooling time of the primary cooling groove is directly proportional to the thickness of the inner rubber layer.

[0084] For the cable core with a larger diameter, it is coated with a thicker inner layer of rubber. The basic cooling temperature and basic cooling time of the primary cooling tank are adjusted according to the thickness of the inner layer of rubber, thereby ensuring that the inner layer of rubber can be formed in the primary cooling tank, and then facilitating the scraping mechanism to scrape the inner layer of rubber reasonably, thereby ensuring the tightness between the aramid fiber and the inner layer of rubber, thereby ensuring the number of bending times that the charging cable can withstand.

[0085] Please continue reading Figure 2 , Figure 2 Schematic diagram of a process for preparing a new energy vehicle charging cable in an embodiment of the present invention;

[0086] The present invention also discloses a method for preparing a new energy vehicle charging cable, which is applied to a preparation device for the new energy vehicle charging cable, comprising:

[0087] Step S1, determining the thickness of the inner rubber layer coated on the inner core of the cable to be processed;

[0088] Step S2, determining the basic cooling temperature and basic cooling time of the primary cooling tank according to the thickness of the inner rubber layer;

[0089] Step S3, judging whether to adjust the basic cooling temperature of the primary cooling tank according to the value detected by the pressure sensor located at the scraping mechanism;

[0090] Step S4, if the value detected by the pressure sensor is still not within the standard range after the adjustment in step S3, the basic cooling time of the primary cooling tank is adjusted, and the rotation speed of the rotating mechanism is adjusted at the same time;

[0091] Step S5, secondary cooling the inner layer rubber after scraping;

[0092] Step S6, bundling and attaching the aramid fibers to the grooves of the inner rubber layer;

[0093] Step S7, covering the inner rubber layer with the aramid fiber by the outer rubber layer.

[0094] By adding an outer layer of rubber outside the inner layer of rubber and aramid fiber, the tightness between the aramid fiber and the inner layer of rubber is ensured, thereby ensuring the number of bending times that the charging cable can withstand.

[0095] Please continue reading Figure 3-Figure 4 , Figure 3 Schematic diagram of the structure of a charging cable prepared in an embodiment of the present invention; Figure 4 Schematic diagram of the bending experiment equipment in the embodiment of the present invention.

[0096] The present invention also discloses a new energy vehicle charging cable, which is prepared according to the preparation method of the new energy vehicle charging cable, comprising a cable inner core 71, an inner rubber layer 72, an aramid fiber belt 73, and an outer rubber layer 74, wherein:

[0097] The inner rubber layer is coated on the inner core of the cable, and a thread-shaped groove is arranged on the surface of the inner rubber layer;

[0098] The aramid fiber belt is used to bind the inner rubber layer through the thread-shaped grooves;

[0099] The outer rubber layer is coated on the inner rubber layer which is bound with the aramid fiber belt.

[0100] The cable prepared by the present invention has better bending resistance than the traditional cable, and is much better than the general cable after bending test. The bending test comparison data is shown in Table 1.

[0101] Table 1

[0102]

[0103] Bending test equipment Figure 4 ;

[0104] The bending test equipment includes a fixed part 81 and a movable part 82. A through hole is provided between the fixed part and the movable part to allow the cable 7 to pass through. The movable part can swing 180° periodically around the fixed part to simulate the bending of the cable.

[0105] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A device for preparing a new energy vehicle charging cable, characterized in that: include, A primary cooling tank is used to cool the inner core of the cable covered with an inner layer of rubber; The scraping mechanism is used to scrape the inner rubber layer passing through the primary cooling groove, so that the inner rubber layer surface forms grooves that are easy to cover; different specifications of scraping mechanisms are set for cable cores with different diameters; A rotating mechanism connected to the scraping mechanism to drive the scraping mechanism to rotate; Secondary cooling tank, used to cool the inner rubber layer after scraping; A binding mechanism, used for binding and attaching the aramid fiber to the groove of the inner rubber layer; The primary dragging mechanism is arranged between the scraping mechanism and the secondary cooling tank, and is used to drag the cable inner core coated with the inner layer of rubber after the scraping is completed. The scraping mechanism is provided with a pressure sensor laterally, which can detect the resistance encountered during scraping; The central control module is respectively connected to the primary cooling trough, the scraping mechanism, the rotating mechanism, the secondary cooling trough, the bundling mechanism, and the primary dragging mechanism. The central control module determines the initial working mode of each component according to the diameter of the cable inner core, and determines whether to adjust the temperature of the primary cooling trough according to the data detected by the pressure sensor. However, when adjusting the temperature of the primary cooling trough alone cannot ensure that the data detected by the pressure sensor is within the preset range, the central control module adjusts the dragging speed of the primary dragging mechanism to ensure that the data detected by the pressure sensor is within the preset range.

2. The manufacturing device of the new energy vehicle charging cable according to claim 1, characterized in that: The pressure sensor detects the pressure value in real time and transmits the detection result to the central control module. If the detected pressure value is within the standard pressure range, the central control module determines that there is no need to adjust the working state of each component; If the detected pressure value is not within the standard pressure range, the central control module determines that the working state of each component needs to be adjusted.

3. The manufacturing device of the new energy vehicle charging cable according to claim 2, characterized in that: If the detected pressure value is not within the standard pressure range and is lower than the standard pressure range, the central control module determines that the inner core of the cable coated with the inner layer rubber is insufficiently cooled in the primary cooling tank, and the central control module controls the primary cooling tank to cool down, thereby increasing the cooling efficiency of the inner layer rubber.

4. The manufacturing device of the new energy vehicle charging cable according to claim 3, characterized in that: If the detected pressure value is not within the standard pressure range and is greater than the standard pressure range, the central control module determines that the cable core coated with the inner layer rubber is overcooled in the primary cooling tank. The central control module controls the temperature of the primary cooling tank to reduce the cooling efficiency of the inner layer rubber.

5. The manufacturing device of the new energy vehicle charging cable according to claim 4, characterized in that: A minimum cooling temperature is set in the primary cooling tank. If the pressure value detected under the minimum cooling temperature condition is still lower than the standard pressure range, the central control module adjusts the dragging speed of the primary dragging mechanism to reduce the dragging speed of the primary dragging mechanism so as to extend the cooling time of the cable core coated with the inner layer of rubber in the primary cooling tank, and adjusts the rotation speed of the rotating mechanism at the same time.

6. The manufacturing device of the new energy vehicle charging cable according to claim 2, characterized in that: A maximum cooling temperature is set in the primary cooling tank. If the pressure value detected under the maximum cooling temperature condition is still greater than the standard pressure range, the central control module adjusts the dragging speed of the primary dragging mechanism, increases the dragging speed of the primary dragging mechanism, so as to reduce the cooling time of the cable core coated with the inner layer of rubber in the primary cooling tank, and adjusts the rotation speed of the rotating mechanism at the same time.

7. The manufacturing device of the new energy vehicle charging cable according to claim 2, characterized in that: For cable cores of different diameters, the thickness of the inner rubber coating is different, the basic cooling temperature and basic cooling time of the first-level cooling trough are different, and the pressure ranges set therefor are also different.

8. The manufacturing device of the new energy vehicle charging cable according to claim 7, characterized in that: The basic cooling temperature of the primary cooling groove is inversely proportional to the thickness of the inner rubber layer, and the basic cooling time of the primary cooling groove is directly proportional to the thickness of the inner rubber layer.

9. A method for preparing a new energy vehicle charging cable, applied to the preparation device for the new energy vehicle charging cable according to any one of claims 1 to 8, characterized in that: include, Step S1, determining the thickness of the inner rubber layer coated on the inner core of the cable to be processed; Step S2, determining the basic cooling temperature and basic cooling time of the primary cooling tank according to the thickness of the inner rubber layer; Step S3, judging whether to adjust the basic cooling temperature of the primary cooling tank according to the value detected by the pressure sensor located at the scraping mechanism; Step S4, if the value detected by the pressure sensor is still not within the standard range after the adjustment in step S3, the basic cooling time of the primary cooling tank is adjusted, and the rotation speed of the rotating mechanism is adjusted at the same time; Step S5, secondary cooling the inner layer rubber after scraping; Step S6, bundling and attaching the aramid fibers to the grooves of the inner rubber layer; Step S7, covering the inner rubber layer with the aramid fiber by the outer rubber layer.

10. A new energy vehicle charging cable, prepared according to the preparation method of the new energy vehicle charging cable according to claim 9, characterized in that: It includes a cable inner core, an inner rubber layer, an aramid fiber belt, and an outer rubber layer, wherein: The inner rubber layer is coated on the inner core of the cable, and a thread-shaped groove is arranged on the surface of the inner rubber layer; The aramid fiber belt is used to bind the inner rubber layer through the thread-shaped grooves; The outer rubber layer is coated on the inner rubber layer which is bound with the aramid fiber belt.

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