Charging pile thermal management system

Abstract

The present invention relates to the technical field of heat dissipation of charging piles, and discloses a charging pile thermal management system, including: a natural air cooling circuit, a loop heat pipe circuit, and an air supply device, the air supply device including a first air duct and a second air duct sleeved on the outside of the first air duct, the bottom end of the first air duct is rotatably installed with a damper; the first air duct is used to provide cold air for the loop heat pipe circuit, and the second air duct is used to provide cold air for the natural air cooling circuit; the damper can close the first air duct or the second air duct. The charging pile thermal management system provided by the present invention combines a natural air cooling circuit with a loop heat pipe circuit, and the natural air cooling circuit performs forced convection cooling on a large area in the charging pile. When the charging module has a local high temperature, the loop heat pipe circuit performs efficient heat dissipation on the high heat flux density area of ​​the charging module to prevent the occurrence of local hot spots; while meeting the requirements of fast charging of electric vehicles, it still ensures efficient dissipation of heat generated in the charging pile.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation of charging piles, and in particular to a thermal management system of a charging pile. Background Art

[0002] A car is a vehicle that has its own power to drive and can be driven without tracks or electricity. In a broad sense, vehicles with four wheels are generally called cars. Most of the current cars are powered by fuel, and with the emission of automobile exhaust and industrial waste gas, the global temperature is generally rising. Electric vehicles (BEV) refer to cars that use on-board power as power, use motors to drive the wheels, and meet the requirements of road traffic and safety regulations. Because the impact on the environment is relatively small compared to traditional cars, its prospects are widely optimistic. At present, electric vehicles are used by more and more people due to their energy-saving, environmental protection, and economic characteristics. The electric vehicle industry has also ushered in rapid development, and the development of corresponding electric vehicle-related industries has also received more and more attention from society.

[0003] The charging pile is the most important facility in the electric vehicle charging and replacement system. It uses a dedicated charging interface and conduction method to provide AC power to electric vehicles with on-board chargers, and has corresponding communication, billing and safety protection functions. Electric vehicles can be charged by inserting coins or purchasing a dedicated IC card. Since there are a large number of electronic components inside the charging pile, a lot of heat will be generated during operation. Especially in the hot summer, if the heat is not discharged in time, it is easy to cause the charging pile to burn.

[0004] The existing charging pile cooling system can only cool the charging pile system through heat pipes or natural air cooling. The cooling capacity is constant and very limited, and it is impossible to dissipate heat in local high heat generation areas in a timely and effective manner. Summary of the invention

[0005] An embodiment of the present invention provides a charging pile thermal management system, which is used to solve or partially solve the problem of poor heat dissipation efficiency of the existing charging pile cooling system.

[0006] An embodiment of the present invention provides a charging pile thermal management system, including: a natural air cooling circuit, a loop heat pipe circuit and an air supply device, the air supply device including a first air duct and a second air duct arranged outside the first air duct, a damper being rotatably installed at the bottom end of the first air duct; the first air duct is used to provide cold air for the loop heat pipe circuit, and the second air duct is used to provide cold air for the natural air cooling circuit; the damper can close the first air duct or the second air duct.

[0007] On the basis of the above technical solution, the natural air cooling circuit includes an air outlet channel and an air inlet channel surrounded by the outside of the charging module, the air outlet channel is connected to the air inlet channel, and the second air duct is connected to the air inlet channel.

[0008] On the basis of the above technical solution, an exhaust fan is installed on the air outlet channel.

[0009] Based on the above technical solution, the loop heat pipe circuit includes a first heat exchanger, a steam pipeline, a second heat exchanger and a liquid pipeline which are connected end to end in sequence; the first heat exchanger is arranged in a high heat flux density area of ​​the charging module, and the first air duct is used to provide cold air for the second heat exchanger.

[0010] Based on the above technical solution, the second heat exchanger is installed inside the first air duct.

[0011] On the basis of the above technical solution, the loop heat pipe of the second heat exchanger is a gravity loop heat pipe without a capillary wick or a loop heat pipe with a capillary wick.

[0012] On the basis of the above technical solution, the loop heat pipe circuit includes a plurality of the first heat exchangers connected in parallel.

[0013] On the basis of the above technical solution, the first heat exchanger includes a top shell and a bottom shell, the top shell is arranged on the bottom shell, and a accommodating chamber is defined between the top shell and the bottom shell; a capillary core is installed inside the accommodating chamber to separate the accommodating chamber into a pressure equalizing chamber and a liquid storage chamber, and a steam channel connected to the pressure equalizing chamber is constructed inside the capillary core.

[0014] On the basis of the above technical solution, the capillary core is prepared by sintering copper powder at 300°C to 500°C.

[0015] On the basis of the above technical solution, the top shell is detachably mounted on the bottom shell.

[0016] A charging pile thermal management system provided by an embodiment of the present invention flexibly controls the operation of a natural air cooling circuit and a loop heat pipe circuit through the corresponding rotation of the air damper. The natural air cooling circuit and the loop heat pipe circuit can work separately or together according to the heat dissipation requirements of the charging module. The charging pile thermal management system provided by an embodiment of the present invention combines a natural air cooling circuit with a loop heat pipe circuit, and flexibly adjusts the ratio of the air damper opening according to the heat generated by the charging module. The natural air cooling circuit performs forced convection cooling on a large area in the charging pile. When the charging module has a local high temperature, the loop heat pipe circuit efficiently dissipates heat in the high heat flux density area of ​​the charging module to prevent the occurrence of local hot spots and ensure the normal operation of the charging module. While meeting the requirements of fast charging of electric vehicles, it still ensures efficient dissipation of heat generated in the charging pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of a working state of a charging pile thermal management system according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of another working state of the charging pile thermal management system according to an embodiment of the present invention;

[0020] Figure 3 This is another working state schematic diagram of the charging pile thermal management system according to an embodiment of the present invention;

[0021] Figure 4 Schematic diagram of the structure of the first heat exchanger according to an embodiment of the present invention.

[0022] Reference numerals:

[0023] 1. Steam pipeline; 2. Second heat exchanger; 3. Liquid pipeline; 4. First heat exchanger; 5. Air inlet channel; 6. Exhaust fan; 7. Air outlet channel; 8. Air supply device; 9. Loop heat pipe; 10. Air inlet; 11. Capillary core; 12. Bottom shell; 13. Top shell; 14. Liquid storage chamber; 15. Pressure equalizing chamber; 16. Steam channel; 17. Charging module; 18. Damper. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 the present invention can be understood according to specific circumstances.

[0026] The charging pile thermal management system of the embodiment of the present invention includes: a natural air cooling circuit, a loop heat pipe circuit and an air supply device 8, the air supply device 8 includes a first air duct and a second air duct arranged outside the first air duct, and a damper 18 is rotatably installed at the bottom end of the first air duct; the first air duct is used to provide cold air for the loop heat pipe circuit, and the second air duct is used to provide cold air for the natural air cooling circuit; the damper 18 can close the first air duct or the second air duct.

[0027] It should be noted that the natural air cooling circuit is used to perform forced convection cooling on a large area in the charging pile; when local high temperature appears in the charging module 17, the loop heat pipe circuit is used to efficiently dissipate heat in the high heat flux density area of ​​the charging module 17 to prevent the occurrence of local hot spots and ensure the normal operation of the charging module 17.

[0028] It can be understood that the air supply device 8 is used to deliver the cold air from the outside to the first air duct and the second air duct, that is, the cold air from the outside enters the first air duct and the second air duct respectively through the air inlet 10. Among them, the size of the first air duct is smaller than that of the second air duct, the inner wall of the second air duct and the outer wall of the first air duct constitute an air duct for providing cold air for the natural air cooling circuit, and the bottom end of the first air duct is located above the bottom end of the second air duct; or the top end of the second air duct is located at a position lower than the bottom end of the first air duct.

[0029] The following description will be made by taking the example that the top end of the second air duct is located lower than the bottom end of the first air duct.

[0030] Air vents are provided at the bottom of the first air duct and the top of the second air duct, and a damper 18 that can rotate 180° is provided at the bottom of the first air duct, and the corresponding air vents are closed or opened by rotating the damper 18. When the air vent at the bottom of the first air duct is closed, the loop heat pipe circuit cannot work; when the air vent at the top of the second air duct is closed, the natural air cooling circuit cannot work. The damper 18 can be driven by a stepper motor, and a temperature sensor is provided at the charging module 17, and the stepper motor performs corresponding work according to the data obtained by the temperature sensor.

[0031] In an embodiment of the present invention, the operation of the natural air cooling circuit and the loop heat pipe circuit is flexibly controlled by corresponding rotation of the air door 18. According to the heat dissipation requirements of the charging module 17, the natural air cooling circuit and the loop heat pipe circuit can work separately or together.

[0032] The charging pile thermal management system provided by the embodiment of the present invention combines a natural air cooling circuit with a loop heat pipe circuit. The ratio of the opening of the air door is flexibly adjusted according to the heat generated by the charging module. The natural air cooling circuit performs forced convection cooling on a large area in the charging pile. When the charging module has a local high temperature, the loop heat pipe circuit efficiently dissipates heat in the high heat flux density area of ​​the charging module to prevent the occurrence of local hot spots and ensure the normal operation of the charging module. While meeting the fast charging requirements of the electric vehicle, the heat generated in the charging pile is still efficiently dissipated.

[0033] On the basis of the above embodiment, the natural air cooling circuit includes an air outlet channel 7 and an air inlet channel 5 arranged outside the charging module 17, the air outlet channel 7 is connected to the air inlet channel 5, and the second air duct is connected to the air inlet channel 5.

[0034] It should be noted that the size of the second air duct is consistent with the size of the air inlet channel 5, and the bottom end of the second air duct is connected to the top end of the air inlet channel 5, and the second air duct and the air inlet channel 5 can be integrally formed. Among them, the height of the cooling space constructed by the air inlet channel is designed according to demand, and the height of the cooling space can be 1.6m to 1.8m.

[0035] It is understandable that in order to improve the heat dissipation efficiency of the natural air cooling circuit, an exhaust fan 6 is installed on the air outlet channel 7.

[0036] Based on the above embodiment, the loop heat pipe loop includes a first heat exchanger 4, a steam pipeline 1, a second heat exchanger 2 and a liquid pipeline 3 which are connected end to end in sequence; the first heat exchanger 4 is arranged in a high heat flux density area of ​​the charging module 17, and the first air duct is used to provide cold air for the second heat exchanger 2.

[0037] It should be noted that the first heat exchanger 4 may be an evaporator, and the second heat exchanger 2 may be a condenser.

[0038] The working process of the loop heat pipe loop is described in detail below. First, the working medium in the evaporator absorbs heat and evaporates. The refrigerant in the vapor refrigeration loop enters the condenser through the vapor pipeline 1 under the action of the pressure difference, condenses in the condenser, condenses into a liquid working medium through the condenser, enters the evaporator through the liquid pipeline 3, evaporates, absorbs the heat of the charging module 17 and the air inside the charging pile housing, and then evaporates and flows back to the condenser, thus completing the cooling cycle.

[0039] On the basis of the above embodiment, the second heat exchanger 2 is installed inside the first air duct.

[0040] It should be noted that the second heat exchanger 2 is installed inside the first air duct, and the first air duct provides the second heat exchanger 2 with the cold air required for operation. After the air outlet is closed, the cold air in the second heat exchanger 2 cannot be discharged, and the second heat exchanger 2 stops working; or the second heat exchanger 2 is installed outside the first air duct. After the air outlet is closed, the cold air cannot enter the second heat exchanger 2, and the second heat exchanger 2 also stops working.

[0041] It can be understood that the loop heat pipe 9 of the second heat exchanger 2 is a gravity loop heat pipe without a capillary wick or a loop heat pipe with a capillary wick.

[0042] On the basis of the above embodiment, the loop heat pipe circuit includes a plurality of first heat exchangers 4 connected in parallel.

[0043] It should be noted that, in order to improve the heat dissipation efficiency, a plurality of first heat exchangers 4 connected in parallel may be installed in the casing, and each charging module 17 is correspondingly provided with a first heat exchanger 4 .

[0044] Based on the above embodiments, Figure 4 As shown, the first heat exchanger 4 includes a top shell 13 and a bottom shell 12, the top shell 13 is arranged on the bottom shell 12, and a accommodating chamber is defined between the top shell 13 and the bottom shell 12; a capillary core 11 is installed inside the accommodating chamber to separate the accommodating chamber into a pressure equalizing chamber 15 and a liquid storage chamber 14, and a steam channel 16 connected to the pressure equalizing chamber 15 is constructed inside the capillary core 11.

[0045] It should be noted that the liquid working medium in the liquid storage chamber 14 absorbs heat and evaporates into a gaseous working medium, which is discharged to the outside of the top shell 13 through the steam channel, that is, moves from the pressure equalizing chamber 15 through the steam pipeline 1 to the inside of the second heat exchanger 2.

[0046] It is understandable that the capillary core 11 is made by sintering copper powder at 400° C. The top shell 13 is detachably mounted on the bottom shell 12 .

[0047] like Figure 1 As shown, the loop heat pipe circuit does not work, and the natural air cooling circuit starts to run. In the embodiment of the present invention, the two air outlets on the left and right sides of the second air duct are opened, and the air outlets of the first air duct are closed. The air flow direction is upward to cool the various components inside the casing, and the air is discharged to the outside of the casing through the exhaust fan 6 of the air outlet channel 7 for continuous cooling.

[0048] like Figure 2 As shown, the loop heat pipe circuit is working, and the natural air cooling circuit is not running. In an embodiment of the present invention, the two air outlets on the left and right sides of the second air duct are closed, and the air outlet of the first air duct is opened, and the high heat flux density area of ​​the charging module 17 is cooled by multiple evaporators connected in parallel.

[0049] like Figure 3 As shown, the loop heat pipe circuit works and the natural air cooling circuit operates. In the embodiment of the present invention, the two air outlets on the left and right sides of the second air duct are opened, and the air outlet of the first air duct is opened. Air enters from the air inlet channel 5 on the upper part of the casing to cool the various components inside the casing, and is discharged to the outside of the casing through the exhaust fan 6 of the air outlet channel 7; the evaporator is attached to the charging module 17, and the working fluid vaporizes and absorbs heat in the evaporator, thereby reducing the temperature of the charging module 17 and the casing.

[0050] It should be noted that the opening ratio of the damper 18 can control the air intake volume of the air intake passage and the heat exchange efficiency of the second heat exchanger.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A charging pile thermal management system, characterized in that: include: A natural air cooling circuit, a loop heat pipe circuit, and an air supply device, wherein the air supply device comprises a first air duct and a second air duct sleeved outside the first air duct, and a damper is rotatably installed at the bottom end of the first air duct; the first air duct is used to provide cold air for the loop heat pipe circuit, and the second air duct is used to provide cold air for the natural air cooling circuit; the damper can close the first air duct or the second air duct; The loop heat pipe loop includes a first heat exchanger, a steam pipeline, a second heat exchanger and a liquid pipeline which are connected end to end in sequence; the first heat exchanger is arranged in a high heat flux density area of ​​the charging module, and the first air duct is used to provide cold air for the second heat exchanger; The second heat exchanger is installed inside the first air duct; The loop heat pipe circuit includes a plurality of the first heat exchangers connected in parallel.

2. The charging pile thermal management system according to claim 1, characterized in that: The natural air cooling circuit includes an air outlet channel and an air inlet channel surrounded by the outside of the charging module, the air outlet channel is connected to the air inlet channel, and the second air duct is connected to the air inlet channel.

3. The charging pile thermal management system according to claim 2, characterized in that: An exhaust fan is installed on the air outlet channel.

4. The charging pile thermal management system according to claim 1, characterized in that: The loop heat pipe of the second heat exchanger is a gravity loop heat pipe without a capillary wick or a loop heat pipe with a capillary wick.

5. The charging pile thermal management system according to claim 1, characterized in that: The first heat exchanger includes a top shell and a bottom shell, the top shell is arranged on the bottom shell, and a accommodating chamber is defined between the top shell and the bottom shell; a capillary core is installed inside the accommodating chamber to separate the accommodating chamber into a pressure equalizing chamber and a liquid storage chamber, and a steam channel connected to the pressure equalizing chamber is constructed inside the capillary core.

6. The charging pile thermal management system according to claim 5, characterized in that: The capillary core is prepared by sintering copper powder at 300°C to 500°C.

7. The charging pile thermal management system according to claim 5, characterized in that: The top case is detachably mounted on the bottom case.

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