High-power direct-current charging pile with liquid-cooled cable automatic winding and unwinding function

Abstract

The utility model relates to a high-power direct-current charging pile with a function of automatically winding and unwinding a liquid-cooled cable, which comprises a charging pile body, a cavity penetrating through the charging pile body is arranged on the charging pile body, a charging gun is arranged on the inner wall surface of the cavity, and the charging gun is connected with the liquid-cooled cable. And an unwinding device for automatically winding and unwinding the liquid cooling cable is arranged in the charging pile body. The unwinding device comprises a mechanical locking device, a cable pressing mechanism and a winding mechanism, the mechanical locking device is used for locking the charging gun on the charging pile body, the cable pressing mechanism is in linkage with the winding mechanism, and the winding mechanism is used for winding and unwinding the liquid cooling cable; and the wire pressing mechanism is matched with the winding mechanism to wind and unwind the liquid-cooled cable by limiting the position of the liquid-cooled cable. When a user pulls out the charging gun from the charging pile, the charging pile can automatically send out the liquid cooling cable; after charging is completed, when a user returns the charging gun, the charging pile automatically recycles and returns the liquid cooling charging cable, and it is ensured that the liquid cooling charging cable is not rolled and abraded by an automobile.

Description

Technical Field

[0001] The utility model relates to the technical field of charging piles, in particular to a high-power DC charging pile with a liquid-cooling cable automatic retracting and releasing function. Background Art

[0002] A charging pile is a device that replenishes power for electric vehicles. Its function is similar to that of a gas pump in a gas station. It can be fixed on the ground or on a wall and installed in public buildings (charging stations, shopping malls, public parking lots, etc.) and residential parking lots. It can charge various types of electric vehicles according to the adjusted voltage and current.

[0003] DC charging piles are also generally called "fast charging". They are generally connected to the AC power grid, convert AC power into DC power through an internal power module, and control the output of continuously adjustable voltage and current according to demand. They can be used as a power supplement for non-onboard electric vehicles, providing sufficient power and effectively achieving fast charging requirements. Usually, a charging output power greater than or equal to 120KW is considered high power. When the charging output power exceeds 240KW, since the current flowing through the charging gun line exceeds 400A, liquid cooling cables are generally used to ensure the heat dissipation of the cable.

[0004] With the rapid development of battery charging and discharging technology, in order to completely eliminate the anxiety of charging mileage, DC charging piles are gradually moving towards greater output power. In order to achieve a higher power output, the current must be increased while increasing the output voltage. Therefore, the charging gun line generally adopts liquid cooling technology, which controls the temperature rise of the gun line conductor within the acceptable range specified by the specification through a more efficient heat dissipation method. At present, the most cutting-edge products on the market can pass 800A-1000A current with a thinner (main conductor 40mm2) cable cross-section. With the iteration of technology, there is also a trend of lighter and more flexible development.

[0005] In the existing technology, the management of charging stations is generally extensive. After the charging gun is hung, the charging cable is not wound onto the charging pile as required. The charging cable is discarded everywhere, and it is difficult to avoid being crushed by cars. After the liquid cooling cable is repeatedly crushed and rubbed for a long time, there may be safety hazards such as internal flow channel deformation, damage, insulation damage, and leakage, which seriously affect the operation of the charging station. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a high-power DC charging pile with an automatic retractable liquid-cooling cable function. When using this charging pile for charging, when the user pulls out the charging gun from the charging pile, the charging pile can automatically send out the liquid-cooling cable; after charging is completed, when the user returns the charging gun to its place, the charging pile automatically retracts the liquid-cooling charging cable to its place, thereby ensuring that the liquid-cooling charging cable is not worn, twisted, or bent due to being run over by a car or dragged by humans, and maintaining the beauty and cleanliness of the charging pile and charging station.

[0007] The above utility model object of the utility model is achieved through the following technical solutions:

[0008] A high-power DC charging pile with an automatic retractable liquid cooling cable function comprises a charging pile body, a cavity penetrating the charging pile body is provided on the charging pile body, a charging gun is installed on the inner wall surface of the cavity, a liquid cooling cable is connected to the charging gun, and an unwinding device for automatically retracting the liquid cooling cable is arranged in the charging pile body.

[0009] As a further technical solution of the present utility model: the unwinding device includes a mechanical locking device, a wire pressing mechanism and a winding mechanism. The mechanical locking device is used to lock the charging gun on the charging pile body. The wire pressing mechanism is linked with the winding mechanism. The winding mechanism is used to wind up and unwind the liquid cooling cable. The wire pressing mechanism cooperates with the winding mechanism to wind up and unwind the liquid cooling cable by limiting the position of the liquid cooling cable.

[0010] As a further technical solution of the utility model: the winding mechanism comprises a wheel and a reel motor, the output shaft of the reel motor is drivingly connected to the wheel, the reel motor is used to drive the wheel to rotate forward or reverse, and the liquid cooling cable is wound on the wheel;

[0011] A bracket is provided in the charging pile body, the wheel and the reel motor are installed on the bracket, one end of the liquid cooling cable is connected to the charging gun, and the other end passes through the bracket upward and bypasses the wheel, and then bypasses the wire pressing mechanism and is connected to the wiring copper bus and the inlet and outlet liquid pipes of the charging pile.

[0012] As a further technical solution of the utility model: roller guide clamps are rotatably arranged on both sides of the wheel, and the outer wall of the wheel is provided with a limiting groove for embedding the liquid cooling cable, and the roller guide clamp is used to guide the liquid cooling cable when the wheel retracts and releases the liquid cooling cable.

[0013] As a further technical solution of the utility model: the wire pressing mechanism includes a screw motor, a wire pressing screw, a lifting seat, a support rod, a cable receiving roller pressure block and a roller installed on the cable receiving roller pressure block, one end of the wire pressing screw is fixedly connected to the output shaft of the screw motor, the lifting seat is threadedly connected to the wire pressing screw, and the screw motor drives the wire pressing screw to rotate forward or reverse to realize the lifting seat to lift and lower on the wire pressing screw;

[0014] One end of the support rod is detachably fixed on the lifting seat, the cable-collecting roller pressure block is detachably fixed on the end of the support rod away from the lifting seat, and one end of the liquid-cooling cable is wrapped around the wheel and then surrounds below the roller.

[0015] As a further technical solution of the utility model: the angular velocity of the rotation of the wheel disc is the same as the linear velocity of the lifting seat on the wire pressing screw moving up and down.

[0016] As a further technical solution of the utility model: an upper limit plate is arranged at the top end of the wire pressing screw rod, and a lower limit plate is arranged at the bottom end of the wire pressing screw rod.

[0017] As a further technical solution of the utility model: a charging gun seat is installed at the bottom of the bracket, the charging gun is installed on the charging gun seat, and a micro switch is installed on the charging gun.

[0018] In summary, the present invention includes at least one of the following beneficial technical effects:

[0019] The utility model discloses a high-power DC charging pile with the function of automatic retracting and releasing of liquid cooling cables. By setting a reeling device on the charging pile, the liquid cooling cables can be automatically and smoothly retracted without adding any unnecessary operation steps to the user, ensuring that the liquid cooling cables are not crushed by vehicles or stepped on by pedestrians, and preventing safety hazards such as leakage, insulation damage, and short circuits, thereby effectively reducing operation and maintenance costs and extending service life. After the liquid cooling cables are stored, the charging pile and the charging station can remain beautiful and tidy, enhancing the sense of technology of the charging station and turning the charging process into a popular science experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the internal structure of the utility model from the positive direction.

[0022] Figure 3 It is a schematic diagram of the internal structure of the utility model facing backward.

[0023] Figure 4 The utility model is a structural schematic diagram showing the wire pressing mechanism.

[0024] Figure 5 This is a schematic diagram showing the structure of the charging gun holder of the utility model.

[0025] Figure numerals: 1. Charging pile body; 11. Bracket; 12. Charging gun seat; 13. Micro switch; 2. Cavity; 3. Charging gun; 4. Liquid-cooled cable; 5. Unwinding device; 6. Wire pressing mechanism; 61. Screw motor; 62. Wire pressing screw; 63. Lifting seat; 64. Support rod; 65. Cable winding roller pressure block; 66. Roller; 7. Winding mechanism; 71. Wheel; 711. Limiting groove; 72. Reel motor; 73. Roller guide clamp; 8. Upper limit plate; 9. Lower limit plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0027] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] Embodiment 1:

[0030] Reference Figure 1 , a high-power DC charging pile with a liquid cooling cable automatic retracting function disclosed in the utility model, comprises a charging pile body 1, a cavity 2 penetrating the charging pile body 1 is opened on the charging pile body 1, a charging gun 3 is installed on the inner wall surface of the cavity 2, and a liquid cooling cable 4 is connected to the charging gun 3. Figure 2 A reeling device 5 for automatically retracting and releasing the liquid cooling cable 4 is provided in the charging pile body 1 .

[0031] Reference Figure 3 The unwinding device 5 includes a mechanical locking device, a wire pressing mechanism 6 and a winding mechanism 7. The mechanical locking device is used to lock the charging gun 3 on the charging pile body 1. The wire pressing mechanism 6 is linked with the winding mechanism 7. The winding mechanism 7 is used to wind up and unwind the liquid cooling cable 4. The wire pressing mechanism 6 cooperates with the winding mechanism 7 to wind up and unwind the liquid cooling cable 4 by limiting the position of the liquid cooling cable 4.

[0032] Reference Figure 4 The winding mechanism 7 includes a wheel 71 and a reel motor 72. The output shaft of the reel motor 72 is connected to the wheel 71 in a transmission manner. The reel motor 72 is used to drive the wheel 71 to rotate forward or reversely. The liquid cooling cable 4 is wound around the wheel 71. A bracket 11 is provided in the charging pile body 1. The wheel 71 and the reel motor 72 are installed on the bracket 11. One end of the liquid cooling cable 4 is connected to the charging gun 3, and the other end passes through the bracket 11 upward and bypasses the wheel 71, and then bypasses the wire pressing mechanism 6 and is connected to the wiring copper bus and the inlet and outlet liquid pipes of the charging pile.

[0033] Roller guide clamps 73 are rotatably provided on both sides of the wheel 71. The outer wall of the wheel 71 is provided with a limiting groove 711 for embedding the liquid cooling cable 4. The roller guide clamps 73 are used to guide the liquid cooling cable 4 when the wheel 71 retracts and releases the liquid cooling cable 4.

[0034] Reference Figure 4 The wire pressing mechanism 6 includes a screw motor 61, a wire pressing screw 62, a lifting seat 63, a support rod 64, a cable receiving roller pressing block 65, and a roller 66 installed on the cable receiving roller pressing block 65. One end of the wire pressing screw 62 is fixedly connected to the output shaft of the screw motor 61, and the lifting seat 63 is threadedly connected to the wire pressing screw 62. The screw motor 61 drives the wire pressing screw 62 to rotate forward or reverse to realize the lifting seat 63 on the wire pressing screw 62.

[0035] One end of the support rod 64 is detachably fixed on the lifting seat 63, and the cable roller pressure block 65 is detachably fixed on the end of the support rod 64 away from the lifting seat 63. One end of the liquid cooling cable 4 passes around the wheel 71 and then surrounds the bottom of the roller 66. The angular velocity of the wheel 71 is the same as the linear velocity of the lifting seat 63 on the pressing screw rod 62. The top of the pressing screw rod 62 is provided with an upper limit plate 8, and the bottom of the pressing screw rod 62 is provided with a lower limit plate 9. Figure 5 A charging gun seat 12 is installed at the bottom of the bracket 11, the charging gun 3 is installed on the charging gun seat 12, and a micro switch 13 is installed on the charging gun 3.

[0036] The utility model designs a device for automatically retracting and releasing the liquid cooling cable 4 for the charging pile. The device is composed of the main parts such as the liquid cooling cable 4, the wheel 71, the micro switch 13, the wire pressing screw 62, the cable roller pressing block 65, the wheel 71 motor, the roller guide clamp 73, and the bracket 11. Among them, the upper end of the liquid cooling cable 4 is connected to the wiring copper bar and the inlet and outlet liquid pipes and fixed; the travel switch is located in the charging pile plug seat; the wire pressing screw 62 is connected to the cable roller pressing block 65 and is controlled by the screw motor 61; the wheel 71 and the wheel 71 motor and the guide clamp are fixed to the same bracket 11.

[0037] Gun removal and cable feeding: When the user pulls out the charging gun 3 from the charging pile, the mechanical locking device of the gun head will be pressed down synchronously, the travel switch in the charging pile gun seat will be released, the screw rod and cable roller pressure block 65 will slide upward to the upper limit plate 8, and at the same time, the wheel 71 will rotate counterclockwise at a linear speed equal to the movement of the screw rod (the wheel 71 and the screw rod are controlled in linkage), and the liquid-cooled cable 4 will be automatically and smoothly sent out under the guidance of a series of roller guide clamps 73 and rollers 66; when the length of the liquid-cooled cable 4 meets the user's charging needs, when the user releases the mechanical locking device, the liquid-cooled cable 4 stops being sent out, the user can charge, and the automatic cable feeding process ends.

[0038] Hanging the gun and winding the cable: After charging is completed, the user returns the charging gun 3 to its original position, triggering the travel switch in the charging gun seat 12, and the screw rotates, so that the cable winding roller pressure block 65 smoothly presses the liquid cooling cable 4 to the lower limit plate 9 of the screw. At the same time, the wheel 71 rotates clockwise at a linear speed equal to the movement of the screw (the wheel 71 and the screw are controlled in linkage), and the liquid cooling cable 4 is retracted to its original position in the opposite direction along the wheel 71 and the roller guide clamp 73, and the automatic winding process ends.

[0039] The implementation principle of the utility model is as follows: the utility model discloses a high-power DC charging pile with the function of automatic retracting and releasing of liquid cooling cables. By setting a reeling device 5 on the charging pile, the liquid cooling cable 4 can be automatically and smoothly retracted without adding any unnecessary operation steps to the user, ensuring that the liquid cooling cable 4 is not crushed by vehicles or stepped on by pedestrians, and preventing safety hazards such as leakage, insulation damage, and short circuit, thereby effectively reducing operation and maintenance costs and extending service life. After the liquid cooling cable 4 is stored, the charging pile and the charging station can remain beautiful and tidy, enhancing the sense of technology of the charging station and turning the charging process into a popular science experience.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-power DC charging pile with a liquid-cooled cable automatic retracting function, comprising a charging pile body (1), the charging pile body (1) is provided with a cavity (2) penetrating the charging pile body (1), a charging gun (3) is installed on the inner wall surface of the cavity (2), and the characteristics are: The charging gun (3) is connected to a liquid cooling cable (4), and the charging pile body (1) is provided with an unwinding device (5) for automatically retracting and unwinding the liquid cooling cable (4); The unwinding device (5) comprises a mechanical locking device, a wire pressing mechanism (6) and a winding mechanism (7); the mechanical locking device is used to lock the charging gun (3) on the charging pile body (1); the wire pressing mechanism (6) is linked with the winding mechanism (7); the winding mechanism (7) is used to wind up and unwind the liquid cooling cable (4); the wire pressing mechanism (6) cooperates with the winding mechanism (7) to wind up and unwind the liquid cooling cable (4) by limiting the position of the liquid cooling cable (4).

2. A high-power DC charging pile with automatic retractable liquid cooling cable according to claim 1, characterized in that: The winding mechanism (7) comprises a wheel (71) and a winding motor (72), wherein an output shaft of the winding motor (72) is drivingly connected to the wheel (71), and the winding motor (72) is used to drive the wheel (71) to rotate forward or reverse, and the liquid cooling cable (4) is wound on the wheel (71); A bracket (11) is arranged inside the charging pile body (1), the wheel (71) and the reel motor (72) are mounted on the bracket (11), one end of the liquid cooling cable (4) is connected to the charging gun (3), and the other end passes through the bracket (11) upwards and bypasses the wheel (71), then bypasses the wire pressing mechanism (6) and is connected to the wiring copper bus and the inlet and outlet liquid pipes of the charging pile.

3. A high-power DC charging pile with automatic retractable liquid cooling cable according to claim 2, characterized in that: Roller guide clamps (73) are rotatably provided on both sides of the wheel disc (71), and a limiting groove (711) for embedding the liquid cooling cable (4) is provided on the outer wall of the wheel disc (71), and the roller guide clamps (73) are used to guide the liquid cooling cable (4) when the wheel disc (71) retracts and releases the liquid cooling cable (4).

4. A high-power DC charging pile with automatic retractable liquid cooling cable function according to claim 2, characterized in that: The wire pressing mechanism (6) comprises a screw motor (61), a wire pressing screw rod (62), a lifting seat (63), a support rod (64), a cable receiving roller pressure block (65), and a roller (66) installed on the cable receiving roller pressure block (65); one end of the wire pressing screw rod (62) is fixedly connected to the output shaft of the screw motor (61); the lifting seat (63) is threadedly connected to the wire pressing screw rod (62); the screw motor (61) drives the wire pressing screw rod (62) to rotate forward or reverse to realize the lifting seat (63) to be lifted and lowered on the wire pressing screw rod (62); One end of the support rod (64) is detachably fixed to the lifting seat (63), the cable-collecting roller pressure block (65) is detachably fixed to one end of the support rod (64) away from the lifting seat (63), and one end of the liquid-cooling cable (4) passes around the wheel (71) and then surrounds the bottom of the roller (66).

5. A high-power DC charging pile with automatic retractable liquid cooling cable function according to claim 4, characterized in that: The angular velocity of the rotation of the wheel disc (71) is the same as the linear velocity of the lifting seat (63) on the wire pressing screw rod (62) moving up and down.

6. A high-power DC charging pile with automatic retractable liquid cooling cable function according to claim 4, characterized in that: An upper limit plate (8) is arranged at the top end of the wire pressing screw rod (62), and a lower limit plate (9) is arranged at the bottom end of the wire pressing screw rod (62).

7. A high-power DC charging pile with automatic liquid cooling cable retraction function according to claim 2, characterized in that: A charging gun seat (12) is installed at the bottom of the bracket (11), the charging gun (3) is installed on the charging gun seat (12), and a micro switch (13) is installed on the charging gun (3).

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