A new energy automobile anti-deformation charging pile cable

Abstract

The application relates to a new-energy-vehicle anti-deformation charging pile cable, which comprises, from inside to outside, a cable main body, an inner insulation layer and a wear-resistant outer insulation layer; a current variable fluid is filled between the inner insulation layer and the wear-resistant outer insulation layer; the cable main body comprises square-array-arranged conductive inner core bodies, current-responsive elastic belts are connected between two groups of adjacent conductive inner core bodies in the horizontal direction and the vertical direction, and the remaining spaces are filled with high-elasticity rubber inner cores; a pressure sensor is used to monitor which side of the charging pile cable touches the ground in a charging use state, and then the square structure is changed into a trapezoidal structure which is narrow at the top and wide at the bottom; the charging pile cable with the trapezoidal structure has a wide bottom surface, can disperse stress, and has obvious vertical compression resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to a new energy vehicle anti-deformation charging pile cable, belonging to the technical field of cables. BACKGROUND

[0002] With the continuous expansion of the new energy electric vehicle market, a large number of charging piles follow, the emergence of charging piles greatly facilitates the charging of new energy vehicles, with the continuous improvement of fast charging technology, the requirements for charging pile cables are also getting higher and higher, traditional cables cannot withstand the requirements of fast charging, so many special cables for charging piles appear in the market;

[0003] In order to improve the anti-vehicle crushing ability of the existing cable, the cable armor thickness is increased, this design makes the existing charging pile cable thicker and thicker, the structure of which is too thick and hard to be rolled up, therefore, a charging pile cable which can be hardened during operation and softened during non-use for easy rolling is needed;

[0004] For example, the patent announcement No. CN118507136B discloses a "charging pile special cable", by setting up a current variable liquid on the outer layer of the cable main body, the heat exchange conductive liquid in the current variable liquid has no pressure and magnetic fluid in the fluid state in the storage state, the current variable liquid is in a flexible state, which is convenient for rolling and plugging charging operation, in the charging state, the heat exchange conductive liquid generates pressure under the action of the circulating pump, and the magnetic fluid solidifies under the action of the magnetic field generated by the heat exchange conductive liquid current, which can significantly improve the pressure resistance of the cable and effectively avoid damage to the cable during charging use;

[0005] However, the contact surface between the circular structure of the charging pile cable and the ground is small, and the charging pile cable is easily crushed by the vehicle during use. SUMMARY

[0006] The purpose of the present application is to provide a new energy vehicle anti-deformation charging pile cable to solve the problems raised in the background art.

[0007] The technical scheme of the present application is as follows:

[0008] A new energy vehicle anti-deformation charging pile cable, comprising a cable main body, an inner insulation layer and a wear-resistant outer insulation layer arranged in order from inside to outside;

[0009] The inner insulation layer and the wear-resistant outer insulation layer are filled with a current variable liquid;

[0010] The cable main body is wrapped by the inner insulation layer, the cable main body comprises a square array of conductive inner core bodies, two adjacent groups of conductive inner core bodies are connected by a current response type elastic belt, and the remaining space is filled with a high-elasticity rubber inner core.

[0011] The current response type elastic belt comprises a substrate layer, a current variable fluid layer and a composite electroactive layer connected in sequence.

[0012] Preferably, a first conductive layer is arranged on the inner side of the wear-resistant outer insulation layer, a second conductive layer is arranged on the outer side of the inner insulation layer, and the first conductive layer and the second conductive layer are connected through a plurality of isolation connecting layers.

[0013] Preferably, the thickness ratio of the substrate layer, the current variable fluid layer and the composite electroactive layer is 2:3:6.

[0014] Preferably, a plurality of pressure sensors are arranged on the outer side wall of the charging pile cable in a uniform circumferential direction.

[0015] Preferably, the outer side wall of the charging pile cable is provided with a non-inductive temperature detection module.

[0016] Preferably, the high-elasticity rubber inner core comprises a rigid cross and a high-elasticity rubber strip arranged in four corner groove regions of the rigid cross.

[0017] Preferably, in a normal state, the side length of the high-elasticity rubber strip is greater than half of the side length of the rigid cross, and a heat-conducting microchannel is formed between adjacent two groups of high-elasticity rubber strips and the rigid cross.

[0018] Preferably, the opposite ends of the rigid cross are respectively provided with a protruding part and an inner recess part which are adaptively inserted and matched.

[0019] Preferably, when the charging pile cable charges the new energy vehicle, each current response type elastic belt is elongated or shortened, so that the charging pile cable forms a trapezoidal structure which is narrow at the top and wide at the bottom; finally, all the current response type elastic belts turn into a solid state, and the current variable fluid turns into a solid state.

[0020] The present application has the following beneficial effects:

[0021] In the storage state, the current variable fluid is in a fluid flexible state, which facilitates winding and plugging charging operation; in the charging state, the current variable fluid solidifies, which can significantly improve the compression resistance of the charging pile cable and effectively avoid damage of the charging pile cable in the charging use state.

[0022] The pressure sensor monitors which position of the charging pile cable touches the ground in the charging use state, and provides a reference for the deformation of the subsequent multiple current response type elastic belts based on the reference, so that the charging pile cable is changed from a circular structure to a trapezoidal structure which is narrow at the top and wide at the bottom, the wide bottom surface of the trapezoidal structure disperses stress, and the vertical compression resistance is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1It is a schematic diagram of the three-dimensional cross-section structure of the application in the uncharged state.

[0024] Figure 2 It is a schematic diagram of the lateral cross-section structure of the application in the uncharged state.

[0025] Figure 3 It is a schematic diagram of the lateral cross-section structure of the application in the charged state.

[0026] Figure 4 It is a schematic diagram of the current-responsive elastic belt structure of the application.

[0027] Figure 5 It is a schematic diagram of the high-elasticity rubber inner core structure of the application.

[0028] Figure 6 It is a schematic diagram of the second connection and cooperation of the first conductive layer and the second conductive layer of the application.

[0029] Figure 7 It is a schematic diagram of the application after determining the pressure sensor as the base point.

[0030] Figure 8 It is a schematic diagram of the three-dimensional cross-section structure of the application in the uncharged state.

[0031] Figure 9 It is a schematic diagram of the lateral cross-section structure of the application in the uncharged state.

[0032] The reference signs in the drawings are as follows:

[0033] 1, wear-resistant outer insulation layer; 2, inner insulation layer; 3, current variable liquid; 31, isolation connection layer; 4, conductive inner core body; 5, current-responsive elastic belt; 51, base layer; 52, current variable fluid layer; 53, composite electroactive layer; 6, high-elasticity rubber inner core; 61, rigid cross; 62, high-elasticity rubber strip; 63, heat-conducting microchannel. DETAILED DESCRIPTION

[0034] The application will be described in detail below in combination with the drawings and specific embodiments.

[0035] The anti-deformation charging pile cable for new energy vehicles is shown in FIG. Figures 1-2 The charging pile cable is in a circular structure in the uncharged state.

[0036] The charging pile cable comprises, from inside to outside, a cable main body, an inner insulation layer 2, and a wear-resistant outer insulation layer 1, and the inner insulation layer 2 and the wear-resistant outer insulation layer 1 have a certain elastic deformation capacity.

[0037] The space between the second conductive layer on the outer side of the inner insulation layer 2 and the first conductive layer on the inner side of the wear-resistant outer insulation layer 1 is filled with electrorheological fluid 3, with a filling rate between 50% and 80%. The first conductive layer is connected to the positive terminal of the charging pile cable end, and the second conductive layer is connected to the negative terminal of the charging pile cable end. An insulating isolation connection layer 31 is uniformly disposed between the first conductive layer and the second conductive layer, which restricts the flow of electrorheological fluid 3 in each area to only within that area.

[0038] Or, such as Figure 6 As shown, a first insulating protrusion and a second insulating protrusion are respectively provided on the side of the first conductive layer and the second conductive layer that are close to each other to replace the isolation connection layer 31, and the first insulating protrusion and the second insulating protrusion are arranged alternately.

[0039] Multiple pressure sensors are evenly installed circumferentially on the sidewall of the charging pile cable. These pressure sensors are resistive thin-film pressure sensors. When the charging pile cable is used to charge new energy vehicles, its extended portion contacts the ground. By judging the pressure values ​​of each pressure sensor, the system can automatically determine which sensor is closest to the ground. The relative positions of each conductive inner core 4 and each pressure sensor are pre-defined in a plane. Using the pressure sensor closest to the ground as the base point, and the radial direction from this base point to the center of the charging pile cable as the Y-axis and the tangential direction as the X-axis, the positional relationship of each array of conductive inner cores 4 relative to this base point can be determined. This allows for the calculation of the expansion and contraction of each current-responsive elastic band 5. Figure 7 As shown, even though the current-responsive elastic band 5, which is in a roughly horizontal state at this time, has an angle α with the X-axis, it can automatically straighten itself after deforming into a trapezoidal shape.

[0040] The outer side of the cable body is wrapped with an inner insulation layer 2. The cable body includes conductive inner cores 4 arranged in an array under normal conditions. Two adjacent sets of conductive inner cores 4 in the horizontal direction are connected by a current-responsive elastic band 5. Two adjacent sets of conductive inner cores 4 in the vertical direction are also connected by a current-responsive elastic band 5. The remaining space is filled with a highly elastic rubber inner core 6. For example, a set of highly elastic rubber inner cores 6 is filled between the space formed by four adjacent current-responsive elastic bands 5, the inner insulation layer 2, and the current-responsive elastic bands 5.

[0041] like Figure 4 As shown, the current-responsive elastic band 5 includes a base layer 51, an electrorheological fluid layer 52, and a composite electroactive layer 53 connected in sequence.

[0042] The base layer 51 uses a flexible electrode carrier to maintain structural integrity; the electrorheological fluid layer 52 includes a flexible material mesh carrier filled with electrorheological fluid; the composite electroactive layer 53 can be a stretchable dielectric elastomer such as an electrostrictive grafted elastomer; the thickness ratio of the base layer 51, the electrorheological fluid layer 52 and the composite electroactive layer 53 is 2:3:6; the thickness of the composite electroactive layer 53 accounts for about 60%, ensuring that the capacitance characteristics dominate the total capacitive reactance of the system, and ensuring that the driving energy consumption is concentrated in the deformation work (rather than the ohmic loss of the electrorheological cavity); when the thickness of the electrorheological fluid layer 52 is 1 / 2 the thickness of the composite electroactive layer 53, the shear stress distribution is the most uniform.

[0043] High elastic rubber core 6 under normal conditions Figure 5 As shown, it includes a rigid cross 61 and four sets of highly elastic rubber strips 62 distributed in its four regions. The cross-section of the highly elastic rubber strips 62 is square. Under normal conditions, the length and width of the highly elastic rubber strips 62 are greater than 1 / 2 the horizontal / vertical ends of the rigid cross 61, so that heat-conducting microchannels 63 are formed between adjacent two highly elastic rubber strips 62 and the horizontal / vertical ends of the rigid cross 61. Multiple heat dissipation channels can be formed inside the charging pile cable through the heat-conducting microchannels 63. The opposite ends of the rigid cross 61 are respectively designed with compatible plug-in protrusions and concave parts; as Figure 2 As shown, a set of highly elastic rubber cores 6 are provided between four adjacent current-responsive elastic strips 5; a set of highly elastic rubber cores 6 or highly elastic rubber strips 62 can be provided between the inner insulation layer 2 and the adjacent current-responsive elastic strips 5.

[0044] Since the rigid cross 61 has a rigid structure, in order to avoid affecting the bending of the charging pile cable, the rigid cross 61 includes multiple sets of cross bodies arranged along the length of the charging pile cable, with a certain gap between adjacent cross bodies.

[0045] The current-responsive elastic band 5 has a channel through which the end of the rigid cross 61 passes. The conductive inner core 4 is not directly fixed to the inner wall of the inner insulating layer 2, or the inner wall of the inner insulating layer 2 of the outermost group of conductive inner cores 4 in the square array is fixed to other movable contacts.

[0046] Working principle:

[0047] When the charging pile cable is not in use, such as Figures 1-2 As shown, at this time, the electrorheological fluid 3 between the inner insulation layer 2 and the wear-resistant outer insulation layer 1 is in a liquid state and will not hinder bending deformation; at this time, the electrorheological fluid layer 52 in the current-responsive elastic band 5 is in a liquid state and will not hinder bending deformation.

[0048] When the charging pile cable charges the new energy vehicle, the side of the charging pile cable with a circular structure touches the ground, and the data processing center can determine which side of the charging pile cable touches the ground according to the pressure sensor on the side, thereby providing a direction basis for subsequent control.

[0049] After the reference is determined, each current-responsive elastic belt 5 controls the corresponding composite electroactive layer 53 to shorten or lengthen a set distance according to a preset extension amount, with the pressure sensor as the reference, so that the charging pile cable forms a trapezoidal structure with a narrow top and a wide bottom.

[0050] After the current-variable fluid layer 52 in all current-responsive elastic belts 5 is solidified, the solidified current-responsive elastic belt 5 has a grid structure for supporting the inner cavity of the inner insulation layer 2, thereby improving the overall pressure resistance.

[0051] The rigid cross 61 originally in a vertical state and connected as a whole can be used to support the trapezoidal charging pile cable, thereby further improving the pressure resistance.

[0052] As shown in Figure 3 the charging pile cable after deformation has a symmetrical trapezoidal structure. The charging pile cable after deformation has a trapezoidal structure that not only reduces the overall height but also increases the base area, thereby effectively improving the structural pressure resistance. Moreover, the geometric design of the double-side inclined surfaces provides a smooth transition curve for the vehicle tires, thereby significantly reducing the impact risk when the vehicle wheels overcome obstacles.

[0053] Embodiment Two: contains all the contents of Embodiment One, except that:

[0054] As shown in Figures 8-9 the charging pile cable has a square structure in the non-charging state; and pressure sensors are installed on the four side walls of the charging pile cable.

[0055] Suppose that a length L is composed of a plurality of conductive inner core bodies 4 in the same horizontal direction, and the charging pile cable is in a square state. First, control the composite electroactive layer 53 in all current-responsive elastic belts 5 in a vertical state to shorten the same distance, so that the protruding part and the recessed part of the upper and lower adjacent rigid crosses 61 are inserted and matched, thereby realizing that the upper and lower adjacent rigid crosses 61 are connected as a whole.

[0056] After that, control the composite electroactive layer 53 in the current-responsive elastic belt 5 in a horizontal state to shorten or lengthen a set distance, so that the horizontal length L from top to bottom increases in turn, so that the charging pile cable forms a trapezoidal structure with a narrow top and a wide bottom. The distance by which each composite electroactive layer 53 shortens or lengthens is adaptively adjusted according to the later demand.

[0057] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made according to the content of the present application and the drawings, are also included in the patent protection scope of the present application.

Claims

1. A deformation-resistant charging pile cable for new energy vehicles, characterized in that, It includes a cable body, an inner insulation layer (2), and a wear-resistant outer insulation layer (1) arranged sequentially from the inside out; Electrorheological fluid (3) is filled between the inner insulation layer (2) and the wear-resistant outer insulation layer (1). The cable body is wrapped with an inner insulation layer (2) on the outside. The cable body includes conductive inner cores (4) arranged in a square array. A current-responsive elastic band (5) is connected between two adjacent sets of conductive inner cores (4). The remaining space is filled with a highly elastic rubber inner core (6). The current-responsive elastic band (5) includes a base layer (51), an electrorheological fluid layer (52), and a composite electroactive layer (53) connected in sequence. Multiple pressure sensors are evenly distributed circumferentially on the outer wall of the charging pile cable. When the charging pile cable charges the new energy vehicle, each current-responsive elastic band (5) stretches or shortens, so that the charging pile cable forms a trapezoidal structure that is narrow at the top and wide at the bottom; finally, all the current-responsive elastic bands (5) turn into a solid state and the electrorheological fluid (3) turns into a solid state.

2. The anti-deformation charging pile cable for new energy vehicles as described in claim 1, characterized in that: The wear-resistant outer insulation layer (1) has a first conductive layer on its inner side and the inner insulation layer (2) has a second conductive layer on its outer side. The first conductive layer and the second conductive layer are connected by multiple isolation connection layers (31).

3. The deformation-resistant charging pile cable for new energy vehicles as described in claim 1, characterized in that: The thickness ratio of the substrate layer (51), the electrorheological fluid layer (52), and the composite electroactive layer (53) is 2:3:

6.

4. The deformation-resistant charging pile cable for new energy vehicles as described in claim 1, characterized in that: The outer wall of the charging pile cable is equipped with a non-sensitive temperature detection module.

5. The deformation-resistant charging pile cable for new energy vehicles as described in claim 1, characterized in that: The high-elasticity rubber core (6) includes a rigid cross (61) and high-elasticity rubber strips (62) disposed in the four corner groove areas of the rigid cross (61).

6. The deformation-resistant charging pile cable for new energy vehicles as described in claim 5, characterized in that: Under normal conditions, the side length of the high elastic rubber strip (62) is greater than half the side length of the rigid cross (61), and a heat-conducting microchannel (63) is formed between two adjacent sets of high elastic rubber strips (62) and rigid cross (61).

7. The deformation-resistant charging pile cable for new energy vehicles as described in claim 5, characterized in that: The rigid cross (61) has a protrusion and a concave part that are adapted to be inserted and mated at opposite ends.

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