Micro-electric heating component system of charging pile in alpine region and working method

Abstract

The application discloses a high-cold-region charging pile micro-electric heating assembly system and a working method thereof, and relates to the technical field of charging piles. The application discloses a high-cold-region charging pile micro-electric heating assembly system and a working method thereof, and relates to the technical field of charging piles.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of extremely cold charging piles. BACKGROUND

[0002] The extremely low temperature environment in the high-cold region may cause damage to the electronic components and mechanical parts inside the charging pile, such as cracking of various components on the circuit board, unsmooth action of the relay action part, performance decline and the like, so that the electric heating wire needs to be used for auxiliary heating; in the extremely low temperature environment, the temperature of the electric appliance cabinet shell of the charging pile is very low, the existing electric heating wire attached to the inner wall of the electric appliance cabinet has the problems of uneven heating, and the heat generated by the electric heating wire is absorbed by the case shell, while the case shell itself releases heat to the outside, thereby causing the problem of low heating efficiency; and the central hanging electric heating wire of the cabinet body has the problems of interfering with the maintenance and maintenance of the maintenance personnel, and the safety problem of winding. SUMMARY

[0003] The purpose of the application is to overcome the deficiencies in the prior art, and provide a micro-electric heating assembly system and working method for a charging pile in a high-cold region, which effectively alleviates the risks of cracking of various components of the charging pile, unsmooth action of the relay action part, performance decline and the like in the extremely low temperature environment through cooperation of the fixed micro-electric heating unit and the vertical wire type heating unit.

[0004] Technical scheme: To achieve the above-mentioned purpose, the micro-electric heating assembly system for a charging pile in a high-cold region of the application comprises a high-cold region charging pile electric box, a plurality of fixed micro-electric heating units and temperature sensors are discretely arranged in the high-cold region charging pile electric box, and the plurality of fixed micro-electric heating units are arranged near a plurality of electrical components in the high-cold region charging pile electric box which need special anti-freezing protection; a plurality of vertical wire type heating units are arranged in a horizontal array on the top of the high-cold region charging pile electric box.

[0005] Further, the fixed micro-electric heating unit is a multilayer structure; the innermost layer is a micro-current heating alloy wire, the middle layer is an insulating layer, and the outermost layer is a heat dissipation layer.

[0006] Further, the vertical wire type heating unit comprises a reel drive motor and an electric heating wire reel which are fixedly installed on the top of the high-cold region charging pile electric box, the reel end is coaxially connected to the electric heating wire reel, and the electric heating wire reel can lead out and recover the downwardly hanging micro-electric heating wire.

[0007] Further, the micro-electric heating wire comprises an electric heating alloy wire inner core extending in the length direction and a flexible insulating outer skin.

[0008] Further, the electric heating wire reel comprises two insulating discs arranged at the same coaxial distance, and the two insulating discs are integrally connected through the insulating reel ring at the coaxial center, and a winding ring groove is formed between the two insulating discs.

[0009] In the non-heating state, the micro electric heating wire is wound in the winding ring groove outside the insulating reel ring and forms an electric heating wire winding body.

[0010] Further, a part of the insulating reel ring is provided with a notch, and a flap shaft is arranged at the notch, the two ends of the flap shaft are fixed with the insulating discs, the flap shaft is rotatably sleeved outside the bearing through the metal rotating sleeve, one side of the metal rotating sleeve is integrally connected with an arc-shaped metal flap extending out of the notch, and the other side of the metal rotating sleeve is integrally connected with a metal spring piece extending into the inner ring of the insulating reel ring; one end of the metal rotating sleeve is connected with a torsion spring, and in the free state, the torsion spring applies a counterclockwise torsion to the metal rotating sleeve, so that the arc-shaped metal flap is tightly attached to the outer peripheral surface of the insulating reel ring; a metal contact rod is arranged at the inner side of the notch of the insulating reel ring, and when the inner arc surface of the arc-shaped metal flap is tightly attached to the outer peripheral surface of the insulating reel ring, the metal contact rod is separated from the metal spring piece, and on this basis, the metal spring piece swings clockwise around the flap shaft axis to contact and electrically connect the metal contact rod.

[0011] Further, the end of the metal contact rod is fixedly connected with the insulating disc; the metal contact rod is electrically connected with the metal slip ring on the insulating disc through the metal conductive strip at the inner side of the insulating disc; further comprising an electric brush in electric sliding cooperation with the metal slip ring, and the electric brush is electrically connected with the positive electrode of the power supply through the galvanometer; the upper end of the micro electric heating wire is fixedly and electrically connected with the outer arc surface of the arc-shaped metal flap, and the lower end of the micro electric heating wire is fixedly and electrically connected with the counterweight iron column in the suspended state; a plurality of metal permanent magnetic columns are fixedly installed at the bottom of the electrical box in the high-cold area charging pile electrical box, and each metal permanent magnetic column corresponds to one electric heating wire reel above.

[0012] When the electric heating wire reel draws out all the wound micro electric heating wires downward, the notch on the insulating reel ring faces downward, and the counterweight iron column at the lower end of the plumb-shaped micro electric heating wire is just attracted and electrically connected by the metal permanent magnetic column corresponding to the position directly below; at this time, the plumb-shaped micro electric heating wire is pulled downward by the counterweight iron column under the action of the gravity of the counterweight iron column and the magnetic attraction of the metal permanent magnetic column, so that the arc-shaped metal flap is swung clockwise around the flap shaft axis to overcome the torsion of the torsion spring, thereby driving the metal spring piece to swing clockwise around the flap shaft axis to contact and electrically connect the metal contact rod, and at this time, the arc-shaped metal flap extends to the right and downward.

[0013] If the metal permanent magnetic column is removed on the basis of this state, the plumb-shaped micro electric heating wire cannot pull the arc-shaped metal flap to overcome the torsion of the torsion spring only by the gravity of the counterweight iron column.

[0014] Further, on the basis that the electric heating wire reel hangs down all the micro electric heating wires, after the electric heating wire reel rotates clockwise °, the arc-shaped metal flap extends to the lower left, the pulling direction of the upper end of the micro electric heating wire on the arc-shaped metal flap tends to make the arc-shaped metal flap swing counterclockwise around the flap shaft axis, so that the metal spring sheet is driven away from the metal contact rod; the metal permanent magnet column is grounded.

[0015] Further, the working method of the high-cold-area charging pile micro electric heating component system, the process of a single vertical wire type heating unit entering the heating mode: the reel drive motor drives the electric heating wire reel to slowly rotate counterclockwise until the electric heating wire reel hangs down all the micro electric heating wires, at which time the reel is paused, if the electric heating wire reel has hung down all the micro electric heating wires, but the galvanometer has not detected current, it is immediately determined that the counterweight iron column is not attracted by the metal permanent magnet column at this time, and the micro electric heating wire is wound, at which time the controller immediately sends this determination to the maintenance personnel.

[0016] Beneficial effects: The fixed micro electric heating unit and the vertical wire type heating unit effectively alleviate the risk problems of cracking of various elements of the charging pile, unsmooth movement of the relay action part, performance decline and the like in the extremely low temperature environment.

[0017] Since the plumb-bob-shaped micro electric heating wire penetrates the entire inner cavity of the high-cold-area charging pile electrical box from top to bottom, and does not adhere to the inner wall of the high-cold-area charging pile electrical box, the plumb-bob-shaped micro electric heating wire can uniformly release heat to the inner cavity of the high-cold-area charging pile electrical box at this time, thereby achieving the effect of uniformly heating the entire inner cavity of the high-cold-area charging pile electrical box. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the external structure of the cabinet body;

[0019] Figure 2 It is a schematic diagram of the distribution of the heating unit of the cabinet body, and the vertical wire type heating unit of this diagram is in a heating state;

[0020] Figure 3 It is a schematic diagram of the heating state of a plurality of vertical wire type heating units in the cabinet body;

[0021] Figure 4 It is a principle diagram of a single vertical wire type heating unit in a heating state;

[0022] Figure 5 It is a schematic diagram of a single vertical wire type heating unit converting from a non-heating state to a heating state;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the electric heating wire reel;

[0024] Figure 7This is a schematic diagram of the heating wire reel after the micro-electric heating wire is completely led out;

[0025] Figure 8 for Figure 7 A partially enlarged structural stereogram;

[0026] Figure 9 This is a schematic diagram of the arc-shaped metal seesaw extending to the lower left after the heating wire coil rotates 90° clockwise in the heating state.

[0027] Figure 10 for Figure 9 A partially enlarged schematic diagram shows that, based on the heating state, the heating wire reel rotates 90° clockwise, and the arc-shaped metal seesaw extends to the lower left. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] like Figures 1 to 10 The micro-electric heating component system of the high-cold area charging pile shown in the figure includes an electrical box 22 of the high-cold area charging pile. Figure 2 Several fixed micro-electric heating units 24 and temperature sensors are discretely arranged in the electrical box 22 of the charging pile in the high-cold area. Several fixed micro-electric heating units 24 are distributed near several electrical components that require special anti-freeze protection in the electrical box 22 of the charging pile in the high-cold area, so as to protect the electrical components that are vulnerable to extremely low temperature conditions in the electrical box 22 of the charging pile in the high-cold area in a targeted manner; the fixed micro-electric heating units 24 all adopt a multi-layer structure; the innermost layer is a micro-current heating alloy wire, and the middle layer is an insulating interlayer, which uses special polymer materials to reduce the rapid loss of heat to the surrounding environment; the outermost layer is a heat dissipation layer, which has good heat dissipation performance and can dissipate heat in time. When working, the fixed micro-electric heating unit 24 is connected to the power supply, and the electrical energy is converted into heat energy. The heat is conducted to the outer heat dissipation layer through the middle insulating layer, while heating the key parts of the charging pile, it can also ensure the reasonable control of the component's own temperature; the control system intelligently adjusts the power of the micro-electric heating component according to the data feedback from the temperature sensor. When the temperature is low, the power output is increased to quickly raise the temperature. When the temperature reaches the set optimum range, the power is reduced to maintain a stable temperature and avoid overheating. The control system can also adjust the heating strategy appropriately based on the different charging stages and battery status.

[0030] When the ambient temperature is lower than -30℃, the overall temperature of the inner cavity of the charging pile electrical box 22 in the high-cold region enters an extremely low state, the local temperature control effect of the fixed micro-electric heating unit 24 will be seriously weakened or even failed due to the overall low-temperature environment, and other electrical elements of the charging pile electrical box 22 in the high-cold region are also prone to fail to work normally or be affected in performance under the extremely low-temperature condition. Therefore, on the basis of local key temperature control, the overall uniform heating in the cabinet is also needed, and the following structure is designed:

[0031] As shown in Figure 2 , a plurality of vertical wire type heating units 23 are arranged in a horizontal array at the top of the charging pile electrical box 22 in the high-cold region.

[0032] The vertical wire type heating unit 23 includes a reel drive motor 90 fixedly installed at the top of the charging pile electrical box 22 in the high-cold region, an electric heating wire reel 5, an axis of the reel 9 connected in synchronization with an output end of the reel drive motor 90 is horizontal, and the electric heating wire reel 5 is fixedly connected to the reel 9 at the end of the axis, the electric heating wire reel 5 can lead out and recover the downwardly hanging micro-electric heating wire 2; the electric heating wire reel 5 is made of insulating material, the micro-electric heating wire 2 includes an electric heating alloy wire inner core and a flexible insulating outer skin extending along the length direction; as shown in Figure 6 、 7 , 8, the electric heating wire reel 5 includes two insulating discs 5a arranged at the same axis center distance, the two insulating discs 5a are integrally connected through the insulating reel ring 1 at the same axis center, and a winding ring groove 4 is formed between the two insulating discs 5a.

[0033] As shown in the top view of Figure 5 , in the non-heating state, the micro-electric heating wire 2 is wound in the winding ring groove 4 outside the insulating reel ring 1 and forms an electric heating wire winding body 2a; a part of the insulating reel ring 1 is provided with a notch 10, the notch 10 is provided with a flap shaft 17, the flap shaft 17 is parallel to the axis of the electric heating wire reel 5, and the two ends of the flap shaft 17 are fixedly connected to the two insulating discs 5a, the flap shaft 17 is rotatably sleeved outside the bearing through the metal rotating sleeve 14, one side of the metal rotating sleeve 14 is integrally connected with the arc-shaped metal flap 15 extending out of the notch 10, and the other side of the metal rotating sleeve 14 is integrally connected with the metal spring piece 13 extending into the inner ring of the insulating reel ring 1; one end of the metal rotating sleeve 14 is connected with a torsion spring 16, in the free state, the torsion spring 16 applies a counterclockwise torsion force to the metal rotating sleeve 14, so that the arc-shaped metal flap 15 tightly abuts against the outer peripheral surface of the insulating reel ring 1; a metal contact rod 11 parallel to the flap shaft 17 is arranged at the inner side of the notch 10 of the insulating reel ring 1, when the inner arc surface of the arc-shaped metal flap 15 tightly abuts against the outer peripheral surface of the insulating reel ring 1, the metal contact rod 11 is separated from the metal spring piece 13, and on this basis, the metal spring piece 13 swings clockwise around the axis of the flap shaft 17 to contact and electrically connect the metal contact rod 11.

[0034] The end of the metal contact rod 11 is fixedly connected with the insulating disc 5a; the metal contact rod 11 is electrically connected with the metal slip ring 120 on the insulating disc 5a through the metal conductive strip 12 inside the insulating disc 5a; the electric brush 20 is further electrically and slidingly connected with the metal slip ring 120, and the electric brush 20 is electrically connected with the positive pole of the power supply through the galvanometer 101.

[0035] The upper end of the micro electric heating wire 2 is fixedly and electrically connected with the outer arc surface of the arc-shaped metal flap 15, and the lower end of the micro electric heating wire 2 is fixedly and electrically connected with the counterweight iron column 3 in a hanging state; a plurality of metal permanent magnetic columns 6 are fixedly installed at the bottom of the electric box 25 in the electric box 22 of the charging pile in the high-cold area, and each metal permanent magnetic column 6 corresponds to one electric heating wire reel 5.

[0036] As Figure 4 , 7 , 8, when the electric heating wire reel 5 draws down all the wound micro electric heating wires 2, the notch 10 on the insulating ring 1 faces downward, and the counterweight iron column 3 at the lower end of the plumb-shaped micro electric heating wire 2 is just attracted and electrically connected with the metal permanent magnetic column 6 corresponding to the directly below; at this time, the plumb-shaped micro electric heating wire 2 pulls down the arc-shaped metal flap 15 under the action of the gravity of the counterweight iron column 3 and the magnetic attraction of the metal permanent magnetic column 6, so that the arc-shaped metal flap 15 swings clockwise around the flap shaft 17 axis to drive the metal spring 13 to swing clockwise around the flap shaft 17 axis to contact and electrically connect with the metal contact rod 11, at this time, the arc-shaped metal flap 15 extends to the right and downward; if the metal permanent magnetic column 6 is removed on the basis of this state, the plumb-shaped micro electric heating wire 2 cannot pull the arc-shaped metal flap 15 to overcome the torsion of the torsion spring 16 only by the gravity of the counterweight iron column 3.

[0037] On the basis that the electric heating wire reel 5 draws down all the wound micro electric heating wires 2, the electric heating wire reel 5 is rotated 90° clockwise, at this time, the arc-shaped metal flap 15 extends to the left and downward, and the pulling force direction of the upper end of the micro electric heating wire 2 to the arc-shaped metal flap 15 tends to make the arc-shaped metal flap 15 swing counterclockwise around the flap shaft 17 axis, so as to drive the metal spring 13 to be separated from the metal contact rod 11.

[0038] The lower end of the metal permanent magnetic column 6 is electrically connected with the metal shell of the electric box 22 of the charging pile in the high-cold area through the metal base 7, which is equivalent to grounding; the negative pole of the power supply is electrically connected with the metal shell of the electric box 22 of the charging pile in the high-cold area, which is equivalent to grounding.

[0039] Working principle: under normal circumstances, several fixed micro electric heating units 24 are arranged near several electrical elements that need special anti-freezing protection in the high-cold area charging pile electrical box 22, and the key parts in the charging pile cabinet body are heated, so as to protect the vulnerable electrical elements in the high-cold area charging pile electrical box 22 under the extremely low temperature condition; when the ambient temperature is lower than-30℃, due to the overall temperature of the high-cold area charging pile electrical box 22 entering the extremely low state, the local temperature control effect of the fixed micro electric heating unit 24 will be seriously weakened or even failed due to the overall low temperature environment, and other electrical elements in the high-cold area charging pile electrical box 22 are also prone to fail to work normally and their performance is affected under the extremely low temperature condition, therefore, on the basis of local key temperature control, the overall uniform heating in the cabinet body is also needed; the specific operation is as follows:

[0040] Control each vertical wire type heating unit 23 to enter the heating mode, and the process of single vertical wire type heating unit 23 entering the heating mode is as follows:

[0041] It should be noted that the micro electric heating wire 2 of the case is wrapped with a heat-conducting insulating skin.

[0042] Step one, initial state, as Figure 3 , the micro electric heating wire 2 on the electric heating wire reel 5 of the vertical wire type heating unit 23 is wound in the winding ring groove 4 outside the insulating reel 1 and forms an electric heating wire winding body 2a, in this state, the metal spring 13 and the metal contact rod 11 are in a separated state, and at the same time, since the micro electric heating wire 2 is in a non-vertical hanging state, it will not hinder the maintenance and other operations of the workers;

[0043] Step two, control the reel drive motor 90 with electric heating wire reel 5 slowly counterclockwise rotation, so that the electric heating wire winding body 2a gradually in the gravity of the weight iron column 3 gradually under the traction, so that the electric heating wire 2 gradually downward extension of the hanging state, until the electric heating wire reel 5 will be wound down to the micro electric heating wire 2 all downward hanging lead out, at this time the gap 10 on the insulating ring 1 just down, the plumb bob like the lower end of the micro electric heating wire 2 weight iron column 3 just be the corresponding metal permanent magnet column 6 under and electrically connected; At this time the plumb bob like the micro electric heating wire 2 under the action of the weight iron column 3 and the magnetic force of the metal permanent magnet column 6 downward traction arc metal flap 15, make the arc metal flap 15 overcome the torsion spring 16 around the flap shaft 17 axis clockwise swing, so as to drive the metal sheet 13 around the flap shaft 17 axis clockwise swing to contact and electrically connected metal contact rod 11, so that the plumb bob like the micro electric heating wire 2 at this time power, and release heat, and then enter the heating mode of the wire type heating unit 23; Because the plumb bob like the micro electric heating wire 2 from top to bottom through the entire high cold area charging pile electrical box 22 cavity, and not to adhere to the high cold area charging pile electrical box 22 inner wall, so that the plumb bob like the micro electric heating wire 2 at this time can evenly to the high cold area charging pile electrical box 22 cavity release heat, so as to achieve the effect of uniform heating of the entire high cold area charging pile electrical box 22 cavity;

[0044] In the above process, the plumb bob like the micro electric heating wire 2 lower end of the weight iron column 3 in the process of gradually falling if the reason caused by the earthquake and external impact, etc, cause the micro electric heating wire 2 and the electrical elements in the cabinet winding, the weight iron column 3 can not be dropped to be the bottom of the metal permanent magnet column 6, even if the weight iron column 3 finally contact the other metal, conductor, metal shell or electrical contact in the cabinet, because the metal sheet 13 and the metal contact rod 11 is disconnected, so there will be no short circuit and other situations.

[0045] If the above process, if the electric heating wire reel 5 has been wound down to the micro electric heating wire 2 all downward hanging lead out, but the galvanometer 101 still did not detect the current, immediately determine that the weight iron column 3 at this time is not absorbed by the metal permanent magnet column 6, the micro electric heating wire 2 lead out winding, at this time the controller immediately send this judgment to the maintenance personnel.

[0046] Because in the heating state of each plumb bob like the micro electric heating wire 2 through the upper and lower parts of the cabinet, several plumb bob like the micro electric heating wire 2 hanging in the charging pile electrical cabinet cavity will interfere with the opening of the cabinet maintenance box maintenance personnel, but also will bring the problem of winding, therefore, in the normal state and maintenance state, the plumb bob like the micro electric heating wire 2 need to be recycled to each electric heating wire reel 5, the plumb bob like the micro electric heating wire 2 back to the electric heating wire reel 5 in the process as follows:

[0047] The control reel drive motor 90 drives the electric heating wire reel 5 to rotate slowly counterclockwise, so that the plumb-shaped micro electric heating wire 2 is gradually wound on the plumb-shaped micro electric heating wire 2. After the electric heating wire reel 5 rotates 90° clockwise, the arc-shaped metal flap 15 extends to the lower left at this time, as shown in Figure 9 and 10 The pulling force direction of the upper end of the micro electric heating wire 2 on the arc-shaped metal flap 15 tends to make the arc-shaped metal flap 15 swing counterclockwise around the axis of the flap shaft 17, so that the metal spring 13 is driven to separate from the metal contact rod 11; the electric heating alloy wire in the micro electric heating wire 2 is disconnected from the circuit, and then the electric heating wire reel 5 continues to rotate slowly counterclockwise, so that the plumb-shaped micro electric heating wire 2 is continuously retracted, thereby achieving the purpose of recycling the plumb-shaped micro electric heating wire 2.

[0048] The above description is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. The micro-electric heating component system for charging piles in cold regions is characterized by: The invention comprises a high-cold region charging pile electrical box (22), wherein a plurality of fixed micro-electric heating units (24) and temperature sensors are discretely arranged in the high-cold region charging pile electrical box (22), wherein the plurality of fixed micro-electric heating units (24) are distributed near a plurality of electrical components requiring special antifreeze protection in the high-cold region charging pile electrical box (22); and a plurality of vertical wire-type heating units (23) are arranged in a top horizontal array in the high-cold region charging pile electrical box (22); The hanging wire heating unit (23) comprises a reel drive motor (90) fixedly mounted on the top of an electrical box (22) of a charging pile in a high-cold area, and a heating wire reel (5); the end of the reel (9) is coaxially connected to the heating wire reel (5); and the heating wire reel (5) can lead out and recycle a downward hanging micro-electric heating wire (2); The heating wire reel (5) comprises two insulating discs (5a) arranged at a coaxial distance, the two insulating discs (5a) being integrally connected via a coaxial insulating winding ring (1), and a winding ring groove (4) being formed between the two insulating discs (5a); In a non-heating state, the micro-electric heating wire (2) is wound in a winding ring groove (4) outside the insulating winding ring (1) to form an electric heating wire winding body (2a); A notch (10) is provided on a part of the insulating winding ring (1), and a seesaw shaft (17) is provided at the notch (10). Insulating discs (5a) are fixed at both ends of the seesaw shaft (17). The outside of the seesaw shaft (17) is rotatably sleeved on a metal rotating sleeve (14) through a bearing. One side of the metal rotating sleeve (14) is integrally connected with an arc-shaped metal seesaw (15) extending out of the notch (10), and the other side of the metal rotating sleeve (14) is integrally connected with a metal spring (13) extending into the inner ring of the insulating winding ring (1); one end of the metal rotating sleeve (14) is connected with a torsion spring (16), which is automatically In the state, the torsion spring (16) applies a counterclockwise torsion force to the metal rotating sleeve (14), so that the arc-shaped metal seesaw (15) is closely attached to the outer peripheral surface of the insulating ring (1); a metal contact rod (11) is provided inside the notch (10) of the insulating ring (1); when the inner arc surface of the arc-shaped metal seesaw (15) is closely attached to the outer peripheral surface of the insulating ring (1), the metal contact rod (11) is separated from the metal spring (13), and on this basis, the metal spring (13) swings clockwise around the axis of the seesaw shaft (17) until it contacts and electrically connects to the metal contact rod (11); The end of the metal contact rod (11) is fixedly connected to the insulating disc (5a); the metal contact rod (11) is electrically connected to the metal slip ring (120) on the insulating disc (5a) through the metal conductive strip (12) on the inner side of the insulating disc (5a); and also includes a brush (20) electrically slidingly matched with the metal slip ring (120), and the brush (20) is electrically connected to the positive pole of the power supply after passing through the galvanometer (101); the upper end of the micro-electric heating wire (2) is fixed and electrically connected to the outer arc surface of the arc-shaped metal seesaw (15), and the lower end of the micro-electric heating wire (2) is fixed and electrically connected to the counterweight iron column (3) in a suspended state; a plurality of metal permanent magnet columns (6) are fixedly installed at the bottom of the electrical box (25) in the high-cold area charging pile electrical box (22), and each metal permanent magnet column (6) corresponds to a heating wire reel (5) above; When the electric heating wire reel (5) leads all the wound micro-electric heating wire (2) downwardly, the notch (10) on the insulating winding ring (1) faces downward, and the counterweight iron column (3) at the lower end of the plumb bob-shaped micro-electric heating wire (2) is just attracted by the corresponding metal permanent magnet column (6) directly below and electrically connected; at this time, the plumb bob-shaped micro-electric heating wire (2) pulls the arc-shaped metal seesaw (15) downward under the action of the gravity of the counterweight iron column (3) and the magnetic attraction of the metal permanent magnet column (6), so that the arc-shaped metal seesaw (15) overcomes the torsion spring (16) and swings clockwise around the axis of the seesaw shaft (17), thereby driving the metal spring (13) to swing clockwise around the axis of the seesaw shaft (17) until it contacts and electrically connects to the metal contact rod (11), and the arc-shaped metal seesaw (15) extends to the lower right; If the metal permanent magnet column (6) is removed in this state, the plumb bob-shaped micro-electric heating wire (2) cannot move the arc-shaped metal seesaw (15) to overcome the torsion of the torsion spring (16) by relying solely on the gravity of the counterweight iron column (3); On the basis that the electric heating wire reel (5) leads out the wound micro-electric heating wire (2) in a downward hanging manner, the electric heating wire reel (5) rotates 90 degrees clockwise, and the arc-shaped metal seesaw (15) extends to the lower left at this time. The pulling force of the upper end of the micro-electric heating wire (2) on the arc-shaped metal seesaw (15) tends to cause the arc-shaped metal seesaw (15) to swing counterclockwise around the axis of the seesaw shaft (17), thereby driving the metal spring (13) to separate from the metal contact rod (11); the metal permanent magnet column (6) is grounded.

2. The micro-electric heating component system for charging piles in cold regions according to claim 1 is characterized by: The fixed micro-electric heating units (24) are all multi-layer structures; the innermost layer is a micro-current heating alloy wire, the middle layer is an insulating layer; and the outermost layer is a heat dissipation layer.

3. The micro-electric heating component system for charging piles in cold regions according to claim 2 is characterized by: The micro-electric heating wire (2) comprises an electric heating alloy wire inner core extending along the length direction and a flexible insulating outer sheath.

4. The operating method of the micro-electric heating component system for charging piles in cold regions according to claim 3 is characterized by: The process of a single hanging wire type heating unit (23) entering the heating mode: the reel drive motor (90) drives the heating wire reel (5) to rotate slowly counterclockwise until the heating wire reel (5) has completely hung the wound micro-electric heating wire (2) downward and led it out, and then pauses. If the heating wire reel (5) has completely hung the wound micro-electric heating wire (2) downward and led it out, but the galvanometer (101) still does not detect the current, it is immediately determined that the counterweight iron column (3) is not attracted by the metal permanent magnet column (6) at this time, and the led micro-electric heating wire (2) is entangled, and the controller immediately sends this judgment to the maintenance personnel.

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