Micro-electric heating system and control method in charging pile in alpine region

Abstract

The application discloses a high-cold-region charging pile inner package-attached micro-electric heating system, which comprises a charging pile electrical cabinet body, and a plurality of electrical units with shell structures are discretely distributed in the charging pile electrical cabinet body; the package-attached heating unit is further arranged on the shell surface of each electrical unit; the package-attached heating unit comprises a heating unit, a heat preservation unit, a heat conduction unit and a heat transfer unit; the heat transfer unit is clamped between the heat preservation unit and the heat conduction unit, the heat conduction unit is attached to the shell surface of the electrical unit in a heat conduction mode; the heat generated by the heating unit can be uniformly transferred to any part of the heat conduction unit through the heat transfer unit; the scheme of the application not only realizes the uniform heat transmission of the heat conduction sheet to the attached electrical unit, thereby avoiding the problem of overcooling of the electrical unit in the extremely cold state, but also takes into account the temporary heat dissipation demand caused by the thermal effect of the high-current working process of the heated electrical unit.

Description

Technical Field

[0001] This invention belongs to the field of charging piles in extremely cold regions. Background Technology

[0002] In frigid regions, charging stations face extremely low temperatures, which can lead to reduced battery charging efficiency, decreased equipment performance, and even damage. Low temperatures also affect the driving range and charging speed of electric vehicle batteries, increasing user waiting time and inconvenience. Therefore, a system is needed that can automatically regulate the temperature of various electrical components inside the charging station to keep them within a suitable operating temperature range. The system should have a high energy efficiency ratio to reduce energy consumption and operating costs, while also taking into account the temporary heat dissipation needs caused by the thermal effects of the heated electrical components during high-current operation. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides an encapsulated micro-electric heating system and control method for charging piles in high-altitude and cold regions, so as to avoid the problem of excessive cooling of key electrical units in charging piles under extremely cold conditions.

[0004] Technical solution: To achieve the above objectives, the present invention provides an encapsulated micro-electric heating system for charging piles in high-altitude and cold regions, comprising an electrical cabinet for the charging pile, wherein a plurality of electrical units with shell structures are discretely distributed within the electrical cabinet; and further comprising a plurality of encapsulated heating units, wherein each encapsulated heating unit is attached to the shell surface of each electrical unit.

[0005] The encapsulated heating unit includes a heating unit, a heat preservation unit, a heat conduction unit, and a heat transfer unit; the heat transfer unit is sandwiched between the heat preservation unit and the heat conduction unit, and the heat conduction unit is thermally attached to the outer shell surface of the electrical unit; the heat generated by the heating unit can be evenly transferred to any part of the heat conduction unit through the heat transfer unit.

[0006] Furthermore, the insulation unit is an insulation sheet; the heat conduction unit is a heat conduction sheet, which is bonded to the outer shell surface of the electrical unit by thermally conductive silicone grease.

[0007] Furthermore, the heat transfer unit includes a labyrinthine heat-conducting strip distributed in a tortuous labyrinthine pattern on a plane. The labyrinthine heat-conducting strip is sandwiched parallel between the heat-conducting plate and the insulation plate, and the labyrinthine heat-conducting strip divides the space between the heat-conducting plate and the insulation plate into a tortuous labyrinthine heat transfer channel.

[0008] Furthermore, the labyrinthine heat-conducting strip includes a left square vortex-shaped tortuous section and a right square vortex-shaped tortuous section, with a left vortex channel and a right vortex channel formed within the left square vortex-shaped tortuous section and the right square vortex-shaped tortuous section, respectively.

[0009] Furthermore, the left square vortex-shaped bend segment has the opposite vortex rotation direction to the right square vortex-shaped bend segment;

[0010] The segment furthest from the center of the left square vortex-shaped tortuous segment is called the left distal segment, and the segment furthest from the center of the right square vortex-shaped tortuous segment is called the right distal segment. The left distal segment and the right distal segment are integrally connected and on the same extension line; a channel inside the left distal segment and the right distal segment is called the left channel connecting segment and the right channel connecting segment, respectively.

[0011] The left and right square vortex-shaped bends are adjacent to each other, forming a ventilation channel with one end connected to the outside. The insulation sheet at the center of the left vortex channel has a left hole, and the insulation sheet at the center of the right vortex channel has a right hole. A micro-electric heating wire coil is fixedly installed at the axis of the left hole via a left bracket. The micro-electric heating wire coil releases heat when energized. An annular cylinder is integrally and coaxially arranged on the side of the left hole away from the labyrinth-type heat conduction strip. A spherical passive flexible diaphragm is coaxially arranged inside the annular cylinder. The outer contour of the passive flexible diaphragm is sealed to the inner contour of the annular cylinder. A heat storage chamber is formed on the inner side of the passive flexible diaphragm, and the micro-electric heating wire coil is located in the center of the heat storage chamber.

[0012] Furthermore, a permanent magnet is fixedly installed at the axis of the right hole via a right bracket. An active flexible diaphragm is provided on the side of the right hole away from the labyrinth-type heat-conducting strip. The outer contour of the active flexible diaphragm is sealed to the outer side of the insulation sheet. The inner side of the active flexible diaphragm forms a volume-changing chamber. An electromagnetic coil is provided at the axis of the active flexible diaphragm. When the electromagnetic coil is alternately energized in positive and negative directions, the active flexible diaphragm fluctuates up and down under the alternating magnetic attraction and repulsion between the permanent magnet and the electromagnetic coil, thereby creating alternating positive and negative pressures within the volume-changing chamber.

[0013] Furthermore, a rotating air distribution plate is rotatably installed at the intersection of the left channel connecting section, the right channel connecting section, and the ventilation channel. The outer circumferential surface of the rotating air distribution plate is slidably tangential or clearance-fitted with the three inner wall surfaces of the intersection of the left channel connecting section, the right channel connecting section, and the ventilation channel. An arc-shaped air guide channel is provided on the air distribution plate. In the initial state, the arc-shaped air guide channel connects the left channel connecting section and the right channel connecting section, and the outer circumferential surface of the air distribution plate blocks one end of the ventilation channel. When the rotating air distribution plate rotates a certain angle, the arc-shaped air guide channel connects the right channel connecting section and one end of the ventilation channel, and the outer circumferential surface of the air distribution plate blocks the end of the left channel connecting section.

[0014] Furthermore, the working method of the encapsulated micro-electric heating system in the charging pile in high-altitude and cold regions is characterized by: "In the heating mode": the arc-shaped air guide channel connects the left channel connecting section and the right channel connecting section to each other, and the outer circumference of the air distribution plate blocks one end of the air exchange channel; at this time, the micro-electric heating wire coil is energized, and at the same time, the electromagnetic coil is alternately energized in both directions;

[0015] Under "High-efficiency heat dissipation mode":

[0016] Step 1: Immediately disconnect the power to the micro-heating wire coil;

[0017] Step 2: Rotate the air distribution plate until the arc-shaped air guide channel connects the right channel connecting section with one end of the air exchange channel.

[0018] Step 3: Apply forward energization to the electromagnetic coil;

[0019] Step 4: Rotate the air distribution plate until the arc-shaped air guide channel connects the left channel connecting section and the right channel connecting section.

[0020] Step 5: Reverse the energization of the electromagnetic coil;

[0021] Step six: The electromagnetic coil is energized in the forward direction;

[0022] Repeat the cycle from "Step Two" to "Step Six".

[0023] Beneficial effects: This solution of the present invention not only enables the heat-conducting sheet to uniformly transfer heat to the attached electrical unit, thereby avoiding the problem of the electrical unit becoming too cold in extremely cold conditions; it also takes into account the temporary heat dissipation needs caused by the thermal effect of the heated electrical unit during its high-current operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the internal structure of a charging pile;

[0025] Figure 2 This is a schematic diagram of the overall temperature control strategy;

[0026] Figure 3 A schematic diagram showing an encapsulated heating unit attached to the outer casing of an electrical unit;

[0027] Figure 4 for Figure 3 Disassembly diagram;

[0028] Figure 5 This is a disassembled view of the encapsulated heating unit from the rear view.

[0029] Figure 6 This is a schematic diagram of the encapsulated heating unit with the heat-conducting plate hidden from the rear view. In this state, the arc-shaped air guide channel connects the left channel connecting section and the right channel connecting section to each other.

[0030] Figure 7 This is a schematic diagram of the encapsulated heating unit with the heat-conducting plate hidden from the rear view. In this state, the arc-shaped air guide channel connects the right channel connecting section with one end of the air exchange channel.

[0031] Figure 8 for Figure 7 A sectional view. Detailed Implementation

[0032] The invention will now be further described with reference to the accompanying drawings.

[0033] As attached Figures 1 to 8 The attached micro-electric heating system inside the charging pile in the high-altitude cold region shown is, for example... Figure 1 As shown, the device includes an electrical cabinet 41 for the charging pile, within which are discretely distributed several electrical units 9 with shell structures; it also includes several encapsulated heating units 51, each encapsulated heating unit 51 being attached to the shell surface of each electrical unit 9; each encapsulated heating unit 51 includes a heating unit, a heat preservation unit, a heat conduction unit, and a heat transfer unit; the heat transfer unit is sandwiched between the heat preservation unit and the heat conduction unit, and the heat conduction unit is thermally attached to the shell surface of the electrical unit 9; the heat generated by the heating unit can be evenly transferred to any part of the heat conduction unit through the heat transfer unit.

[0034] Electrical unit 9 can be an air switch, power module, controller, DC contactor, AC circuit breaker, DC charging module, etc., and all electrical units 9 are equipped with a housing.

[0035] like Figures 3 to 8 As shown, the insulation unit is an insulation sheet 14 with low thermal conductivity. The insulation sheet 14 can be a rectangular plate-like structure with a rigid plastic outer surface and filled with insulation materials such as polyurethane foam. The heat conduction unit is a heat conduction sheet 18 with high thermal conductivity, such as an aluminum sheet or a copper sheet. The heat conduction sheet 18 is thermally bonded to the outer surface of the electrical unit 9 using thermally conductive silicone grease. The heat transfer unit includes a labyrinthine heat conduction strip 1 that is distributed in a tortuous labyrinthine pattern on a plane. The labyrinthine heat conduction strip 1 is sandwiched parallel between the heat conduction sheet 18 and the insulation sheet 14, and the labyrinthine heat conduction strip 1 divides the space between the heat conduction sheet 18 and the insulation sheet 14 into a tortuous labyrinthine heat transfer channel.

[0036] like Figure 6 , 7 8; The labyrinthine heat-conducting strip 1 includes a left square vortex-shaped tortuous section 1.1 and a right square vortex-shaped tortuous section 1.2, with a left vortex channel 2.1 and a right vortex channel 2.2 formed within the left square vortex-shaped tortuous section 1.1 and the right square vortex-shaped tortuous section 1.2, respectively; the vortex directions of the left square vortex-shaped tortuous section 1.1 and the right square vortex-shaped tortuous section 1.2 are opposite.

[0037] The segment furthest from the center of the left square vortex-shaped tortuous segment 1.1 is denoted as the left distal segment 1.1b, and the segment furthest from the center of the right square vortex-shaped tortuous segment 1.2 is denoted as the right distal segment 1.2b. The left distal segment 1.1b and the right distal segment 1.2b are integrally connected and on the same extension line; the channel inside the left distal segment 1.1b and the right distal segment 1.2b is denoted as the left channel connecting segment 2.1a and the right channel connecting segment 2.2b, respectively.

[0038] The left square vortex-shaped bend segment 1.1 and the right square vortex-shaped bend segment 1.2 are adjacent to each other, forming a left adjacent segment 1.1a and a right adjacent segment 1.2a respectively. A ventilation channel 3, with one end connected to the outside, is formed between the left adjacent segment 1.1a and the right adjacent segment 1.2a. A left hole 4 is cut out on the insulation plate 14 at the center of the vortex in the left vortex channel 2.1, and a right hole 5 is cut out on the insulation plate 14 at the center of the vortex in the right vortex channel 2.2. The axis of the left hole 4 is fixed by a left bracket 8. The device is equipped with a micro-electric heating wire coil 12, which can be a graphene carbon fiber heating wire. The micro-electric heating wire coil 12 releases heat when energized. An annular cylinder 20 is integrally and coaxially arranged on the side of the left hole 4 away from the labyrinth-type heat conduction strip 1. A spherical passive flexible diaphragm 21 is coaxially arranged inside the annular cylinder 20. The outer contour of the passive flexible diaphragm 21 is sealed and connected to the inner contour of the annular cylinder 20. A heat storage chamber 10 is formed on the inner side of the passive flexible diaphragm 21. The micro-electric heating wire coil 12 is located in the center of the heat storage chamber 10.

[0039] A permanent magnet 13 is fixedly installed at the axis of the right hole 5 via the right bracket 9. An active flexible diaphragm 22 is provided on the side of the right hole 5 away from the labyrinth-type heat conduction strip 1. The outer contour of the active flexible diaphragm 22 is sealed to the outer side of the heat insulation sheet 14. The inner side of the active flexible diaphragm 22 forms a volume-changing chamber 11. An electromagnetic coil 23 is provided at the axis of the active flexible diaphragm 22. When the electromagnetic coil 23 is alternately energized in positive and negative directions, the active flexible diaphragm 22 fluctuates up and down under the alternating magnetic attraction and repulsion between the permanent magnet 13 and the electromagnetic coil 23, thereby alternating positive and negative pressures in the volume-changing chamber 11.

[0040] A rotating air distribution plate 6 is rotatably installed at the intersection of the left channel connecting section 2.1a, the right channel connecting section 2.2b, and the ventilation channel 3. The outer circumferential surface of the rotating air distribution plate 6 is slidably tangential or clearance-fitted with the three inner wall surfaces of the intersection of the left channel connecting section 2.1a, the right channel connecting section 2.2b, and the ventilation channel 3. An arc-shaped air guiding channel 7 is provided on the air distribution plate 6. In the initial state, such as... Figure 6 As shown, the arc-shaped air guide channel 7 connects the left channel connecting section 2.1a and the right channel connecting section 2.2b, and the outer circumferential surface of the air distribution plate 6 blocks one end of the air exchange channel 3.

[0041] After the air distribution plate 6 rotates a certain angle, approximately 110° clockwise, the arc-shaped air guide channel 7 connects the right channel connecting section 2.2b with one end of the air exchange channel 3, and the outer circumference of the air distribution plate 6 blocks the end of the left channel connecting section 2.1a. Figure 7 As shown;

[0042] The insulation plate 14 has a perforated rotating hole 15 at the intersection of the left channel connecting section 2.1a, the right channel connecting section 2.2b, and the ventilation channel 3. After rotating the rotating hole 15, one end of the rotating air distribution plate 6 is coaxially fixedly connected to a gear 16. A rack 61 that meshes with the gear 16 is provided on the outside of the insulation plate 14. The plate also includes a linear actuator 60 that can drive the rack 61 to linear displacement.

[0043] The volume change in the inner heat storage chamber 10 caused by the up-and-down fluctuation of the passive flexible diaphragm 21 is denoted as V1; the volume change in the actively changing volume chamber 11 caused by the up-and-down fluctuation of the active flexible diaphragm 22 is denoted as V2; the total volume in the left vortex channel 2.1 and the right vortex channel 2.2 is denoted as V3; V1 = V2 = V3;

[0044] Working principle:

[0045] The heat-conducting sheet 18 of the encapsulated heating unit 51 is thermally bonded to the outer surface of the electrical unit 9 using thermally conductive silicone grease.

[0046] In heating mode: the arc-shaped air guide channel 7 connects the left channel connecting section 2.1a and the right channel connecting section 2.2b, and the outer circumference of the air distribution plate 6 blocks one end of the air exchange channel 3; such as Figure 6 As shown, at this time, the micro-electric heating wire coil 12 is energized, so that the micro-electric heating wire coil 12 continuously heats the air in the heat storage chamber 10; at the same time, the electromagnetic coil 23 is alternately energized in positive and negative directions, and the active flexible diaphragm 22 fluctuates up and down under the alternating magnetic attraction and repulsion between the permanent magnet 13 and the electromagnetic coil 23, so that positive pressure and negative pressure are alternately formed in the volume active change chamber 11, thereby causing the volume in the volume active change chamber 11 to change periodically.

[0047] In any of the above cycles:

[0048] As the volume of the actively changing chamber 11 gradually decreases, the air originally in the actively changing chamber 11 is forced into the left vortex channel 2.1 and the right vortex channel 2.2. The cold air originally in the left vortex channel 2.1 and the right vortex channel 2.2 is forced into the heat storage chamber 10, thereby increasing the pressure inside the heat storage chamber 10. The passive flexible diaphragm 21 oscillates away from the micro-electric heating wire coil 12, forcing the volume inside the heat storage chamber 10 to increase. At the same time, the micro-electric heating wire coil 12 continuously heats the air inside the increased-volume heat storage chamber 10. Subsequently, as the volume of the actively changing chamber 11 gradually increases, the air originally in the left vortex channel 2.1 and the right vortex channel 2.2 is drawn in under negative pressure. The volume of the actively changing chamber 11 increases, while the heated air in the heat storage chamber 10 is drawn into the left vortex channel 2.1 and the right vortex channel 2.2 under the action of negative pressure, so that the left vortex channel 2.1 and the right vortex channel 2.2 are evenly filled with hot air. At the same time, the passive flexible diaphragm 21 fluctuates towards the micro-electric heating wire coil 12 under the action of negative pressure, so that the volume of the heat storage chamber 10 passively decreases. At this time, the hot air evenly filled into the left vortex channel 2.1 and the right vortex channel 2.2 will evenly transfer heat through the labyrinth heat conduction strip 1 or directly to the heat conduction plate 18, and then the heat conduction plate 18 will evenly transfer heat to the attached electrical unit 9, thereby preventing the electrical unit 9 from becoming too cold in extremely cold conditions.

[0049] As can be seen, when the electromagnetic coil 23 is alternately energized in both directions and the micro-heating wire coil 12 is continuously energized, the air in the left vortex channel 2.1 and the right vortex channel 2.2 will be repeatedly drawn into the heat storage chamber 10, heated, and then continuously returned to the left vortex channel 2.1 and the right vortex channel 2.2, so that the heat-conducting plate 18 can evenly transfer heat to the attached electrical unit 9, thereby achieving efficient and uniform heat transfer and release process under local heating conditions;

[0050] During the heating process described above, when the temperature of the outer casing of the attached electrical unit 9 exceeds a threshold, the heat of the electrical unit 9 needs to be released. However, the original insulation sheet 14 will inhibit this process. Therefore, the attached heating unit 51 needs to enter a "high-efficiency heat dissipation mode". The "high-efficiency heat dissipation mode" includes the following process:

[0051] Step 1: Immediately disconnect the power to the micro-heating wire coil 12;

[0052] Step two: Control the linear actuator 60 to drive the rack 61, causing the rotary air distribution plate 6 to rotate until the arc-shaped air guide channel 7 connects the right channel connecting section 2.2b with one end of the air exchange channel 3, as shown. Figure 7 As shown, the outer circumferential surface of the air distribution plate 6 blocks the end of the left channel connecting section 2.1a;

[0053] Step 3: When the electromagnetic coil 23 is energized in the positive direction, the active flexible diaphragm 22 fluctuates away from the permanent magnet 13 under the repulsive force between the permanent magnet 13 and the electromagnetic coil 23, thereby increasing the volume of the volume-changing chamber 11. Under the action of negative pressure, the cold air outside enters the right vortex channel 2.2 through the ventilation channel 3.

[0054] Step four: Control the linear actuator 60 to drive the rack 61, causing the rotary valve plate 6 to rotate until the arc-shaped air guide channel 7 connects the left channel connecting section 2.1a and the right channel connecting section 2.2b. Figure 6 As shown;

[0055] Step 5: Reverse energize the electromagnetic coil 23. Under the magnetic attraction between the permanent magnet 13 and the electromagnetic coil 23, the active flexible diaphragm 22 oscillates towards the side closer to the permanent magnet 13. The cooler air from the outside in the right vortex channel 2.2 is squeezed into the left vortex channel 2.1 under the action of the active flexible diaphragm 22.

[0056] Step six: When the electromagnetic coil 23 is energized in the forward direction, the active flexible diaphragm 22 fluctuates away from the permanent magnet 13 under the repulsive force between the permanent magnet 13 and the electromagnetic coil 23. The air that originally entered the left vortex channel 2.1 is re-inhaled into the right vortex channel 2.2.

[0057] By continuously cycling through "Step Two" to "Step Six", the air in the left vortex channel 2.1 and the right vortex channel 2.2 is periodically exchanged with the cooler air outside, thereby continuously removing the heat from the heat-conducting plate 18 and achieving efficient heat dissipation for the attached electrical unit 9.

[0058] like Figure 2 The overall control strategy shown is as follows:

[0059] (1) During power-on startup and idle state of the charging pile: Within 1-2 minutes after power-on, the program will automatically start running and receive temperature data from multiple temperature sensors to determine whether the temperature of each electrical unit 9, such as air switch, power module, controller, DC contactor, AC circuit breaker, DC charging module, etc., is within the normal range. If it is below the range, the software will control the enclosed heating unit 51 corresponding to each electrical unit 9 to enter the heating mode. At this time, the software will continuously receive data from the temperature sensors. When an electrical unit 9 reaches the normal temperature range, the software will control the enclosed heating unit 51 to stop heating and turn off until all electrical units 9 reach the normal temperature range. Conversely, when a part is below the set temperature range, the software will control the enclosed heating unit 51 of that part to enter the heating mode and start heating until the set temperature range is reached and heating stops.

[0060] (2) During charging: The software will control the electrical unit 9 located in the DC charging module to stop working, because when the DC charging module is working, it will emit a lot of heat. When the electrical unit 9 temporarily exceeds the preset temperature range due to the thermal effect, the corresponding encapsulated heating unit 51 will enter the "high-efficiency heat dissipation mode".

[0061] 4. Troubleshooting

[0062] (1) During the operation of the pile, if the temperature of a certain electrical unit 9 exceeds the preset value, but the heating unit 51 has obviously stopped working, the software will restart the controller of the current enclosed heating unit 51. If the temperature still does not drop, the software will power off the controller of the enclosed heating unit 51 and send this event to the background server for maintenance personnel to come and inspect.

[0063] (2) If the temperature detected by the temperature sensor is abnormal, the software will power off the controller of that part of the heating element and send the event to the back-end server, where maintenance personnel will inspect and diagnose the fault.

[0064] 5. Remote monitoring and data analysis

[0065] (1) Remote monitoring system: Establish a remote monitoring system for charging piles to achieve real-time monitoring and remote control of parameters such as temperature, current, and voltage. Collect and analyze the operating data of the charging piles to optimize control strategies and improve operational efficiency.

[0066] (2) Data Analysis and Optimization: In-depth mining and analysis of the charging pile's operational data to identify potential problems and trends. Based on the analysis results, optimization and adjustment of the charging pile's control strategy, heat-generating component layout, and power output are carried out.

[0067] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An encapsulated micro-electric heating system for charging piles in high-altitude and cold regions, characterized in that: It includes a charging pile electrical cabinet (41), in which several electrical units (19) with shell structures are discretely distributed; it also includes several enclosed heating units (51), each enclosed heating unit (51) is attached to the shell surface of each electrical unit (19); The encapsulated heating unit (51) includes a heating unit, a heat preservation unit, a heat conduction unit, and a heat transfer unit; the heat transfer unit is sandwiched between the heat preservation unit and the heat conduction unit, and the heat conduction unit is thermally attached to the outer surface of the electrical unit (19); the heat generated by the heating unit can be evenly transferred to any part of the heat conduction unit through the heat transfer unit. The heat transfer unit includes a labyrinthine heat-conducting strip (1) that is distributed in a tortuous labyrinthine pattern on a plane. The labyrinthine heat-conducting strip (1) is sandwiched parallel between the heat-conducting plate (18) and the insulation plate (14). The labyrinthine heat-conducting strip (1) divides the space between the heat-conducting plate (18) and the insulation plate (14) into a tortuous labyrinthine heat transfer channel. The labyrinth-type heat conduction strip (1) includes a left square vortex-shaped tortuous section (1.1) and a right square vortex-shaped tortuous section (1.2), and a left vortex channel (2.1) and a right vortex channel (2.2) are formed in the left square vortex-shaped tortuous section (1.1) and the right square vortex-shaped tortuous section (1.2), respectively. The left square vortex-shaped bend (1.1) and the right square vortex-shaped bend (1.2) have opposite vortex directions; The segment furthest from the center of the left square vortex-shaped tortuous segment (1.1) is denoted as the left distal segment (1.1b), and the segment furthest from the center of the right square vortex-shaped tortuous segment (1.2) is denoted as the right distal segment (1.2b). The left distal segment (1.1b) and the right distal segment (1.2b) are integrally connected and on the same extension line; the channel segments inside the left distal segment (1.1b) and the right distal segment (1.2b) are denoted as the left channel connecting segment (2.1a) and the right channel connecting segment (2.2b), respectively. The left square vortex-shaped bend (1.1) and the right square vortex-shaped bend (1.2) are adjacent to each other, forming a left adjacent segment (1.1a) and a right adjacent segment (1.2a), respectively. A ventilation channel (3) is formed between the left adjacent segment (1.1a) and the right adjacent segment (1.2a) with one end connected to the outside. The insulation plate (14) at the center of the vortex in the left vortex channel (2.1) has a left hole (4), and the insulation plate (14) at the center of the vortex in the right vortex channel (2.2) has a right hole (5). The axis of the left hole (4) A micro-electric heating wire coil (12) is fixedly installed at the center via the left bracket (8). The micro-electric heating wire coil (12) releases heat after being energized. An annular cylinder (20) is integrally and coaxially arranged on the side of the left hole (4) away from the labyrinth-type heat conduction strip (1). A spherical passive flexible diaphragm (21) is coaxially arranged inside the annular cylinder (20). The outer contour of the passive flexible diaphragm (21) is sealed and connected to the inner contour of the annular cylinder (20). A heat storage chamber (10) is formed on the inner side of the passive flexible diaphragm (21). The micro-electric heating wire coil (12) is located in the center of the heat storage chamber (10).

2. The encapsulated micro-electric heating system in a charging pile for high-altitude and cold regions according to claim 1, characterized in that: The heat insulation unit is a heat insulation sheet (14); the heat conduction unit is a heat conduction sheet (18), which is bonded to the outer surface of the electrical unit (19) by thermal conductive silicone grease.

3. The encapsulated micro-electric heating system in a charging pile for high-altitude and cold regions according to claim 2, characterized in that: A permanent magnet (13) is fixedly installed at the center of the right hole (5) by a right bracket (9). An active flexible diaphragm (22) is provided on the side of the right hole (5) away from the labyrinth heat-conducting strip (1). The outer contour of the active flexible diaphragm (22) is sealed to the outer side of the heat-insulating sheet (14). An active volume change chamber (11) is formed on the inner side of the active flexible diaphragm (22). An electromagnetic coil (23) is provided at the center of the active flexible diaphragm (22). When the electromagnetic coil (23) is alternately energized in positive and negative directions, the active flexible diaphragm (22) fluctuates up and down under the alternating magnetic attraction and repulsion between the permanent magnet (13) and the electromagnetic coil (23), thereby alternating positive and negative pressures in the active volume change chamber (11).

4. The encapsulated micro-electric heating system in a charging pile for high-altitude and cold regions according to claim 3, characterized in that: A rotating air distribution plate (6) is rotatably installed at the intersection of the left channel connecting section (2.1a), the right channel connecting section (2.2b), and the ventilation channel (3). The outer circumferential surface of the rotating air distribution plate (6) is slidably tangential or clearance-fitted with the three inner wall surfaces at the intersection of the left channel connecting section (2.1a), the right channel connecting section (2.2b), and the ventilation channel (3). An arc-shaped air guide channel (7) is provided on the air distribution plate (6). In the initial state, the arc-shaped air guide channel (7) connects the left channel connecting section (2.1a) and the right channel connecting section (2.2b) to each other, and the outer circumferential surface of the air distribution plate (6) blocks one end of the ventilation channel (3). When the rotating air distribution plate (6) rotates a certain angle, the arc-shaped air guide channel (7) connects the right channel connecting section (2.2b) and one end of the ventilation channel (3) to each other, and the outer circumferential surface of the air distribution plate (6) blocks the end of the left channel connecting section (2.1a).

5. The working method of the encapsulated micro-electric heating system in the charging pile in high-altitude and cold regions according to claim 4, characterized in that: "Heating mode": The arc-shaped air guide channel (7) connects the left channel connecting section (2.1a) and the right channel connecting section (2.2b) to each other, and the outer circumference of the air distribution plate (6) blocks one end of the air exchange channel (3); at this time, the micro electric heating wire coil (12) is energized, and at the same time, the electromagnetic coil (23) is alternately energized in both directions; Under "High-efficiency heat dissipation mode": Step 1: Immediately disconnect the power to the micro-heating wire coil (12); Step 2: Rotate the air distribution plate (6) until the arc-shaped air guide channel (7) connects the right channel connecting section (2.2b) with one end of the air exchange channel (3); Step 3: Apply forward energization to the electromagnetic coil (23); Step 4: Rotate the air distribution plate (6) until the arc-shaped air guide channel (7) connects the left channel connecting section (2.1a) and the right channel connecting section (2.2b). Step 5: Reverse the current flow of the electromagnetic coil (23); Step 6: The electromagnetic coil (23) is energized in the forward direction; Repeat the cycle from "Step Two" to "Step Six".

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