Wiring structure of natural heat dissipation direct current charging cable

Abstract

According to the wiring structure of the natural heat dissipation direct current charging cable, three circles of wires are coaxially and tightly arranged in an insulating sheath of the charging cable, and the number of the three circles of wires is eight, sixteen and five in sequence from outside to inside; the wires of the first circle are thick wires with the same wire diameter, and the wires of the second circle are thin wires with the same wire diameter; in terms of functions, the eight thick wires of the first circle are charging wires, the sixteen thin wires of the second circle are auxiliary wires, and the third circle is provided with a grounding wire and four signal shielding wires. According to the charging cable, the wire diameter of the cable is reduced to the maximum extent on the premise that the charging power is ensured, and the wire diameter of the cable is only 24 mm. The charging cable has the advantages of being thin, light and soft, the use experience feeling of a user is greatly improved, and the charging operation becomes easy. Under the same bearing, the charging cable is large in heat dissipation area and low in temperature rise, the anisotropy of the charging cable in the bending direction is eliminated, and the tensile property of the charging cable is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy electric vehicle charging technical field especially is involved in a kind of natural heat dissipation dc charging cable's wiring structure. BACKGROUND

[0002] At present, the natural heat dissipation dc charging gun used in domestic has 250A and 200A, and the natural heat dissipation dc charging gun of foreign standard, American standard, Japanese standard is 200A. DC charging gun connects special natural heat dissipation integrated cable. Although 200A dc charging gun at home and abroad is not universal, but the integrated cable connected by charging gun, its structure is roughly same, only difference exists in the setting of signal line quantity.

[0003] As Figure 1 As shown in the prior art, the traditional integrated cable commonly used at home and abroad, DC+ power line 114, DC- power line 115 are arranged in the insulating sheath, one root each, the position is on the diameter of integrated cable and is arranged side by side, the upper and lower space formed by two power lines and the inner wall of insulating coating respectively distributes PE ground wire and several signal lines and other functional lines, and the remaining space is filler. Figure 1 The traditional integrated cable shown in the figure has the following shortcomings:

[0004] Shortcoming one: wire diameter is too thick. The power line carrying 200A charging current adopts 60 square millimeter conductor, the outer diameter size of single power line is between 15 millimeters and 16 millimeters, and the width size of two power lines arranged side by side is about 30-32 millimeters. After adding insulating coating, the outer diameter of integrated cable is about 36-38 millimeters.

[0005] Shortcoming two: the layout of conductor is unreasonable. PE ground wire and several signal lines and functional lines are arranged above and below two power lines, and this asymmetric layout structure has the following problems: first, the gap is too large, and filler needs to be added to fill the gap, so that the integrated cable after filling has large hardness, poor roundness and poor appearance; second, two power lines are arranged side by side, which makes the integrated cable difficult to bend in one direction and easy to bend in the other direction, so that the integrated cable has anisotropy in bending direction; third, the integrated cable is bent, which causes partial signal line to be damaged by excessive stretching.

[0006] Shortcoming three: poor human engineering experience. The length of the existing standard integrated cable is usually 5 meters, and the weight of each meter is about 3 kilograms. The weight of 200A dc charging gun is about 1.5 kilograms, and the total weight of the two is 16.5 kilograms, which is not light for charging operation. UTILITY MODEL CONTENT

[0007] In order to overcome the deficiencies in the background art, the utility model discloses a wiring structure of natural heat dissipation dc charging cable, adopts the following technical scheme:

[0008] A natural heat dissipation direct current charging cable wiring structure, three circles of conductors are arranged coaxially and closely in the insulating sheath of the charging cable, the number of the three circles of conductors is eight, sixteen and five from outside to inside in turn; the conductors of the first circle are thick conductors with the same diameter, and the conductors of the second circle are thin conductors with the same diameter; from the function, the eight thick conductors of the first circle are charging wires, the sixteen thin conductors of the second circle are auxiliary wires, and the third circle has one ground wire and four signal shielding wires.

[0009] Further improved technical solutions, the four charging wires in the first circle are connected in parallel by copper noses at both ends to form a DC+ power line; the remaining four charging wires are connected in parallel by copper noses at both ends to form a DC- power line.

[0010] Further improved technical solutions, among the sixteen auxiliary wires of the second circle, four are temperature data transmission lines, four are electronic lock connection lines, and the remaining eight are auxiliary power lines.

[0011] Further improved technical solutions, among the eight auxiliary power lines, four are connected in parallel by terminal connectors at both ends to form an A+ auxiliary power line, and the remaining four are connected in parallel by terminal connectors at both ends to form an A- auxiliary power line.

[0012] Further improved technical solutions, the temperature data transmission lines are T1+ line, T1- line, T2+ line and T2- line; the electronic lock connection lines are PIN1 line, PIN2 line, EL+ line and EL- line; terminal connectors are connected at both ends of the temperature data transmission lines and the electronic lock connection lines.

[0013] Further improved technical solutions, the four signal shielding wires in the third circle are CC1 line, CC2 line, S+ line and S- line respectively; a metal wire shielding net is wrapped outside the signal shielding wires, and terminal connectors are connected at both ends of the signal shielding wires.

[0014] Further improved technical solutions, a wrapping tape is arranged between the conductors of each circle, and the wrapping tape is wound by a non-woven fabric tape.

[0015] Further improved technical solutions, a wrapping tape is arranged between the conductors of each circle.

[0016] Further improved technical solutions, the diameter of the ground wire is 3mm, the diameter of the signal shielding wire is 1.8mm, the diameter of the auxiliary wire is 1.35mm, the diameter of the charging wire is 5.2mm, and the diameter of the insulating sheath is 24mm.

[0017] Due to the adoption of the above technical solutions, compared with the background art, the utility model has the following beneficial effects:

[0018] 1、The charging cable uses multiple small-diameter charging wires in parallel to replace a single large-diameter charging wire, which maximally reduces the wire diameter of the cable under the premise of ensuring 250A charging current, and reduces the wire diameter of the charging cable from 36-38mm to 24mm and the bending radius from 230mm to 80mm. Since the charging cable has the characteristics of thinness, lightness and softness, the user's experience is greatly improved, making the charging operation easy.

[0019] 2、The charging cable uses multiple small-diameter charging wires in parallel to replace a single large-diameter charging wire, which greatly improves the heat dissipation area of the charging wire under the same load, and the temperature rise of the cable is low, so that the charging safety of the cable can be ensured only by natural heat dissipation.

[0020] 3、The thicker external wires protect the thinner internal wires, and the circumferentially uniform arrangement structure eliminates the anisotropy of the charging cable in the bending direction. When pulled, the wires can evenly disperse the pulling force, improving the tensile performance of the charging cable. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The wiring structure diagram of the existing natural cooling DC charging cable is shown.

[0022] Figure 2 The structure diagram of the charging cable and the charging gun is shown.

[0023] Figure 3 The cross-sectional view of the charging cable is shown.

[0024] Figure 4 The partial enlarged view of Figure 2 is shown.

[0025] In the figure:

[0026] 100, charging cable;

[0027] 101, insulating sheath; 102, charging wire; 103, auxiliary wire; 104, ground wire; 105, signal shielding wire; 106, first layer of tape; 107, second layer of tape; 108, third layer of tape; 109, copper nose; 110, terminal; 111, DC+ power wire; 112, DC- power wire;

[0028] 200, charging gun. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that the embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application. It should be noted that in the description of the present application, the terms "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] As shown in Figure 2 , a natural heat dissipation direct current charging cable is connected between a charging gun 200 and a charging pile, and is used for charging an electric vehicle.

[0031] Referring to Figures 2-4 , from the cross-sectional view, there are three circles of wires coaxially and closely arranged in the insulating sheath 101 of the charging cable 100, and the number of wires in the three circles is eight, sixteen and five from outside to inside. The following will be specifically explained.

[0032] The eight wires in the first circle are thick wires with the same wire diameter, and functionally, the eight thick wires are charging wires 102. In the present embodiment, the wire diameter of the charging wires 102 is 5.2 mm.

[0033] When connected with the charging gun 200 and the charging pile, four of the charging wires 102 in the first circle are connected in parallel through the copper nose 109 as a DC+ power wire at both ends; the remaining four charging wires 102 are connected in parallel through the copper nose 109 as a DC- power wire at both ends. Such a design has two beneficial effects, one is to optimize the layout of the cable, to maximize the reduction of the wire diameter of the cable under the premise of ensuring the charging current, and to improve the flexibility of the cable; the other is to increase the heat dissipation area, which is beneficial to the natural heat dissipation of the cable.

[0034] The second circle is a thin conductor wire with the same diameter. In terms of function, the sixteen thin conductor wires of the second circle are auxiliary lines 103. Among the sixteen auxiliary lines 103, four are temperature data transmission lines, four are electronic lock connection lines, and the remaining eight are auxiliary power lines. In the present embodiment, the diameter of the sixteen auxiliary lines 103 is 1.35 mm.

[0035] The four temperature data transmission lines are respectively T1+ line, T1- line, T2+ line and T2- line. The four electronic lock connection lines are respectively PIN1 line, PIN2 line, EL+ line and EL- line. The temperature data transmission lines and the electronic lock connection lines are connected with the terminal 110 at both ends.

[0036] When connected with the charging gun 200 and the charging pile, four of the eight auxiliary power lines are connected in parallel into an A+ auxiliary power line through the terminal 110 at both ends, and the remaining four are connected in parallel into an A- auxiliary power line through the terminal 110 at both ends.

[0037] The third circle has one ground wire 104 and four signal shielding lines 105. In the present embodiment, the diameter of the ground wire 104 is 3 mm, and the diameter of the signal shielding line 105 is 1.8 mm.

[0038] The four signal shielding lines 105 are respectively CC1 line, CC2 line, S+ line and S- line. The four signal shielding lines 105 are wrapped with a metal wire shielding net outside, and the terminal 110 is connected at both ends of the signal shielding line 105. Since the ground wire 104 is thicker, the copper nose 109 is connected at both ends of the ground wire 104.

[0039] In order to protect the conductor wires of each circle, a tape is arranged between the conductor wires of each circle. Specifically, the first layer of tape 106 is arranged between the insulating sheath 101 and the first circle of conductor wires, the second layer of tape 107 is arranged between the first circle of conductor wires and the second circle of conductor wires, and the third layer of tape 108 is arranged between the second circle of conductor wires and the third circle of conductor wires.

[0040] The insulating sheath 101 is made of TPU material. Since the layout of the conductor wires of the present charging cable 100 is optimized, the outer diameter of the insulating sheath 101 is only 24 mm.

[0041] It should be noted that the present charging cable and the charging gun are applicable to GB20234.3-2015 DC charging gun standard, HPC super charging gun standard, IEC 62196-3 American standard charging gun standard, IEC 62196-3 European standard charging gun standard, and IEC 62196-3 Japanese standard charging gun standard.

[0042] The part not described in detail is prior art. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A wiring structure of a natural heat dissipation DC charging cable, characterized by: Three circles of conductors are arranged coaxially and closely in the insulating sheath of the charging cable, and the number of the conductors in the three circles is eight, sixteen and five from outside to inside; the conductors in the first circle are thick conductors with the same diameter, and the conductors in the second circle are thin conductors with the same diameter; from the functional point of view, the eight thick conductors in the first circle are charging lines, the sixteen thin conductors in the second circle are auxiliary lines, and the third circle has one ground line and four signal shielding lines.

2. The natural heat dissipation DC charging cable wiring structure according to claim 1, characterized in that: The four charging lines in the first circle are connected in parallel by copper noses to form a DC+ power line; the remaining four charging lines are connected in parallel by copper noses to form a DC- power line.

3. The natural heat dissipation DC charging cable wiring structure according to claim 1, characterized in that: Among the sixteen auxiliary lines in the second circle, four are temperature data transmission lines, four are electronic lock connecting lines, and the remaining eight are auxiliary power lines.

4. The natural heat dissipation DC charging cable wiring structure according to claim 3, characterized in that: Four of the eight auxiliary power lines are connected in parallel by terminal connectors to form an A+ auxiliary power line, and the remaining four are connected in parallel by terminal connectors to form an A- auxiliary power line.

5. The natural heat dissipation DC charging cable wiring structure according to claim 3, characterized in that: The temperature data transmission lines are T1+ line, T1- line, T2+ line and T2- line; the electronic lock connecting lines are PIN1 line, PIN2 line, EL+ line and EL- line; terminal connectors are connected to both ends of the temperature data transmission lines and the electronic lock connecting lines.

6. The natural heat dissipation DC charging cable wiring structure according to claim 1, characterized in that: The four signal shielding lines in the third circle are CC1 line, CC2 line, S+ line and S- line; a metal wire shielding net is wrapped outside the signal shielding lines, and terminal connectors are connected to both ends of the signal shielding lines.

7. The natural heat dissipation DC charging cable wiring structure according to claim 1, characterized in that: A tape is arranged between the conductors in each circle, and the tape is wound by a non-woven fabric belt.

8. The natural heat dissipation DC charging cable wiring structure according to claim 1, characterized in that: A tape is arranged between the conductors in each circle.

9. The natural heat dissipation DC charging cable wiring structure according to claim 1, characterized in that: The diameter of the ground line is 3mm, the diameter of the signal shielding line is 1.8mm, the diameter of the auxiliary line is 1.35mm, the diameter of the charging line is 5.2mm, and the diameter of the insulating sheath is 24mm.

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