A new liquid cooling heat dissipation device and charging pile

Abstract

The utility model discloses a novel liquid cooling heat dissipation device and charging pile belongs to charging pile heat dissipation technical field, and liquid cooling heat dissipation device includes the oil tank, oil pump, air cooling heat dissipation module and liquid cooling charging module that are connected in proper order, and the box of liquid cooling charging module is equipped with charging power module cage, and the charging power module in charging power module cage is immersed in heat transfer oil, the input, output of charging power module are through the junction box and are connected to the alternating current contactor and integrated control module in charging pile, and the power module of charging pile is cooled down through liquid cooling heat dissipation device. Heat transfer oil circulates in the loop that the oil tank and air cooling heat dissipation module and liquid cooling charging module constitute through oil pump, and the heat of charging power module exchanges heat with heat transfer oil, and then radiates heat through air cooling heat dissipation module, and the heat transfer oil after cooling down is recycled to liquid cooling charging module, realizes the circulating continuous cooling of charging power module, and then prolongs the service life of the internal electronic component of charging pile.

Description

Technical Field

[0001] This utility model belongs to the field of heat dissipation technology for charging piles, and specifically relates to a novel liquid cooling heat dissipation device and a charging pile. Background Technology

[0002] Electric vehicle charging stations function similarly to gas pumps at gas stations. They can be fixed to the ground or walls and installed in public buildings, residential parking lots, or charging stations, or at construction sites and dedicated logistics yards. They can charge various models of electric vehicles according to different voltage levels. The input end of the charging station is directly connected to the AC power grid, and the output end is equipped with a charging plug (charging gun) for charging electric vehicles. Charging stations generally provide two charging methods: regular charging and fast charging. Users can use a specific charging card to swipe on the human-machine interface provided by the charging station to select the charging method, charging time, and print out cost data. The charging station's display screen shows data such as charging amount, cost, and charging time.

[0003] When a charging station is in use, its internal electrical components generate heat. As this heat dissipates, the internal temperature of the charging station rises rapidly. Prolonged exposure to high temperatures can affect the stable operation of these components, accelerate their aging, and in severe cases, even lead to short circuits and fires. Currently, existing charging stations typically have fans for cooling. However, in hot summer weather, the outside air is also hot, making the air blown into the charging station by the fans ineffective in dissipating heat and consequently affecting the lifespan of the internal electronic components.

[0004] As charging piles become increasingly powerful and widely used, their environmental adaptability requirements also rise. Currently available air-cooled charging piles cannot fully meet these requirements, while traditional cold-plate cooling solutions are costly, ineffective, and lack cost-effectiveness. Therefore, there is an urgent need to develop a novel cooling solution—the immersion liquid-cooled charging pile. Utility Model Content

[0005] The purpose of this invention is to provide a novel liquid cooling heat dissipation device, which aims to solve the technical problems of poor heat dissipation effect of existing air-cooled charging piles, resulting in short service life of internal electronic components and poor environmental adaptability, as well as high cost and poor heat dissipation effect of traditional cold plate heat dissipation charging piles.

[0006] To address the above problems, this utility model provides a novel liquid cooling heat dissipation device and charging pile.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A novel liquid cooling heat dissipation device includes an oil storage tank, an oil pump, an air-cooled heat dissipation module, and a liquid-cooled charging module for cooling the charging power module inside a charging pile. The outlet of the liquid-cooled charging module is connected to the inlet of the oil pump through an oil guide pipe, the outlet of the oil pump is connected to the inlet of the oil storage tank through an oil guide pipe, the outlet of the oil storage tank is connected to the inlet of the air-cooled heat dissipation module through an oil guide pipe, and the outlet of the air-cooled heat dissipation module is connected to the inlet of the liquid-cooled charging module through an oil guide pipe.

[0009] The liquid-cooled charging module includes a hollow sealed housing. Inside the housing is a charging power module cage and heat transfer oil. The charging power module cage contains a charging power module, which is immersed in the heat transfer oil. The inlet and outlet of the housing are connected to an air-cooled heat dissipation module and an oil pump, respectively. A junction box is provided on the outside of the housing. The inputs and outputs of multiple charging power modules are connected to the corresponding AC contactors and integrated control modules in the charging pile through the junction box.

[0010] Furthermore, the air-cooled heat dissipation module includes an aluminum plate radiator and a fan. The aluminum plate radiator has oil tanks on both sides. One oil tank has an oil inlet connected to an oil storage tank on its upper side, and the other oil tank has an oil outlet connected to a liquid-cooled charging module on its lower side. The two oil tanks are separated into multiple continuous, curved S-shaped oil passages by multiple baffles. The fan is located on one side of each S-shaped oil passage and is used to cool the heat-conducting oil within the S-shaped oil passages. A protective mesh cover is provided on the outside of the fan, and the protective mesh cover is connected to the outer shell of the aluminum plate radiator.

[0011] Furthermore, the charging power module cage can be one or more, and each charging power module cage contains multiple charging power modules. The top of the charging power module cage is provided with an oil inlet pipe and the bottom is provided with an oil outlet pipe. The inlet of the oil inlet pipe and the outlet of the oil outlet pipe are respectively connected to the air-cooled heat dissipation module and the oil pump. The oil inlet pipe and the oil outlet pipe are respectively provided with an oil inlet nozzle and an oil outlet nozzle corresponding to the charging power module.

[0012] Furthermore, the charging power module cage includes a frame, copper busbars, plug-in terminals, and insulating posts. The charging power module is disposed inside the frame. The copper busbars are connected to the charging power module via plug-in terminals. An insulating post is provided between the copper busbars and the charging power module. The copper busbars and the outgoing copper busbars are connected in an L-shape. The copper busbars are horizontally disposed at the bottom of the charging power module. The outgoing copper busbars are disposed on the outside of the frame on the side of the charging power module and connected to the junction box.

[0013] Furthermore, the rack has guide rails on two opposite sides inside, which cooperate with the charging power module, allowing the charging power module to enter and exit the rack along the guide rails.

[0014] Furthermore, the inner diameter of the oil inlet nozzle gradually increases along the end of the oil inlet pipe, and the inner diameter of the oil outlet nozzle gradually decreases along the oil outlet direction of the oil outlet pipe; the total cross-sectional area of ​​the inner bore of the oil inlet nozzle and the oil outlet nozzle is greater than the inner cross-sectional area of ​​the oil inlet pipe and the oil outlet pipe.

[0015] Furthermore, the breakdown voltage of the heat transfer oil is above 30KV, and its kinematic viscosity at 40℃ is less than 20 mm². 2 / s.

[0016] Furthermore, a level gauge is provided on the side wall of the liquid-cooled charging module housing, and a top cover is provided on the top of the liquid-cooled charging module housing, which is sealed and connected to the top of the housing around the perimeter.

[0017] Furthermore, the oil pump is a magnetic pump, and the inlet of the oil pump is equipped with a filter; the oil storage tank is equipped with an oil filler, a temperature sensor and a pressure relief valve; the oil guide pipe between the oil storage tank and the air-cooled heat dissipation module is equipped with a flow meter and a pressure gauge.

[0018] This utility model also provides a charging pile, including a charging power module and the above-mentioned novel liquid cooling heat dissipation device.

[0019] The technological advancements achieved by this invention compared to existing technologies are as follows:

[0020] This invention uses a liquid cooling device to cool the charging power module inside the charging pile. The heat transfer oil in the liquid cooling device circulates in a loop consisting of an oil tank, an air-cooled cooling module, and a liquid-cooled charging module via an oil pump. The heat generated by the charging power module exchanges heat with the heat transfer oil in the liquid-cooled charging module. The heat transfer oil carries the heat and dissipates it through the air-cooled cooling module. The cooled heat transfer oil then circulates back to the liquid-cooled charging module, achieving continuous cooling of the charging power module and thus extending the service life of the electronic components inside the charging pile. Attached Figure Description

[0021] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0022] In the attached diagram:

[0023] Figure 1 A schematic diagram of a novel liquid cooling heat dissipation device provided for an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the air-cooled heat dissipation module in an embodiment of the present invention;

[0025] Figure 3 for Figure 2A schematic diagram of the rear structure of the air-cooled heat dissipation module;

[0026] Figure 4 This is a schematic diagram of the liquid-cooled charging module in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the charging power module cage in an embodiment of this utility model;

[0028] Figure 6 for Figure 5 View A in the middle;

[0029] Figure 7 This is a schematic diagram of the oil inlet pipe in an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the oil outlet pipe in an embodiment of the present invention;

[0031] Figure 9 This is an external view of the charging pile in an embodiment of this utility model;

[0032] Figure 10 This is a schematic diagram of the heat dissipation principle of the charging pile in an embodiment of this utility model;

[0033] Figure 11 This is an external view of the integrated control module in an embodiment of this utility model;

[0034] Figure 12 for Figure 11 A schematic diagram of the integrated control module after removing the cover plate;

[0035] Figure 13 for Figure 11 Schematic diagram of the internal structure of the integrated control module;

[0036] Figure 14 for Figure 12 View B of the integrated control module;

[0037] In the picture:

[0038] 1-Oil storage tank; 2-Oil pump; 3-Air-cooled heat dissipation module; 4-Charging power supply module; 5-Liquid-cooled charging module; 6-Integrated control module; 7-Filter; 8-Fuel filler nozzle; 9-Temperature sensor; 10-Charging pile; 11-Pressure relief valve; 12-Flow meter; 13-Pressure gauge; 14-Main control board; 15-Auxiliary power supply; 16-Signal terminal; 17-Power distribution DC contactor; 18-Output DC contactor; 19-DC dual-channel meter; 20-Fan; 21-Adapter board; 22-Shunting device; 23-Fuse; 24-Input copper busbar; 25-Output copper busbar;

[0039] 30-Outer casing; 31-Aluminum plate radiator; 32-Fan; 33-Oil tank; 34-S-shaped oil passage; 35-Oil inlet; 36-Oil outlet;

[0040] 50- Junction box; 51- Housing; 52- Charging power module cage; 520- Frame; 521- Oil inlet pipe; 522- Oil outlet pipe; 523- Oil inlet nozzle; 524- Oil outlet nozzle; 525- Wiring copper busbar; 526- Plug-in terminal; 527- Insulating post; 528- Insulating post; 529- Outlet copper busbar; 53- Liquid level gauge; 54- Pipe connector. Detailed Implementation

[0041] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. In the following detailed description of the present utility model, some specific details are described in detail. However, for the parts not described in detail, those skilled in the art can fully understand the present utility model.

[0042] Furthermore, those skilled in the art should understand that the accompanying drawings are provided only to illustrate the purpose, features, and advantages of this utility model, and are not actually drawn to scale.

[0043] Furthermore, unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to."

[0044] like Figure 1As shown in the figure, this utility model provides a novel liquid cooling heat dissipation device, including an oil storage tank 1, an oil pump 2, an air-cooled heat dissipation module 3, and a liquid-cooled charging module 5 for cooling the charging power module 4 inside the charging pile 10. The outlet of the liquid-cooled charging module 5 is connected to the inlet of the oil pump 2 through an oil guide pipe. The outlet of the oil pump 2 is connected to the inlet of the oil storage tank 1 through an oil guide pipe. The outlet of the oil storage tank 1 is connected to the inlet of the air-cooled heat dissipation module 3 through an oil guide pipe. The outlet of the air-cooled heat dissipation module 3 is connected to the inlet of the liquid-cooled charging module 5 through an oil guide pipe. The liquid-cooled charging module 5 includes a hollow sealed housing 51. Inside the housing 51 is a charging power module cage 52 filled with heat-conducting oil. Inside the charging power module cage 52 are charging power modules 4, which are immersed in the heat-conducting oil. The inlet and outlet of the housing 51 are connected to the air-cooled heat dissipation module 3 and the oil pump 2, respectively. A junction box 50 is located on the outside of the housing 51. The inputs and outputs of multiple charging power modules 4 are connected to corresponding AC contactors and integrated control modules 6 within the charging pile 10 through the junction box 50, such as... Figure 4 As shown, an oil pump drives heat transfer oil to circulate in a loop consisting of an oil storage tank, an air-cooled heat dissipation module, and a liquid-cooled charging module, forming a heat dissipation system. When the charging power module is working, it directly transfers heat to the heat transfer oil. After absorbing heat, the heat transfer oil is pumped to the air-cooled heat dissipation module for cooling. The cooled heat transfer oil then circulates back to the liquid-cooled charging module's housing. This cycle continuously dissipates the heat from the charging power module.

[0045] In specific manufacturing processes, the heat transfer oil must meet the following requirements: breakdown voltage above 30KV, kinematic viscosity (40 degrees Celsius) less than 20 mm². 2 The heat transfer oil is chemically stable, neutral in acidity and alkalinity, with a water content not exceeding 30 mg / kg, an insulation resistance greater than 50 megohms, a closed-cup flash point greater than 140 degrees Celsius, and is non-toxic, odorless (with a weak odor), and environmentally friendly. The composition of the heat transfer oil is as follows: 90% naphthenic mineral oil, 9.96% dimethyl silicone oil, 0.35% aluminum nitride powder (1µm), and 0.05% fumed silica.

[0046] In specific embodiments of this utility model, such as Figure 2 and Figure 3As shown, the air-cooled heat dissipation module 3 includes an aluminum plate heat sink 31 and a fan 32. Both sides of the aluminum plate heat sink 31 are equipped with oil tanks 33. One oil tank 33 has an oil inlet connected to an oil storage tank 1 on its upper side, and the other oil tank 33 has an oil outlet connected to a liquid-cooled charging module 5 on its lower side. The two oil tanks 33 are separated into multiple continuously curved S-shaped oil passages 34 by multiple baffles. The fan 32 is located on one side of the S-shaped oil passages 34 and is used to cool the heat-conducting oil within the S-shaped oil passages 34. After absorbing heat from the charging power module, the heat-conducting oil, driven by an oil pump, enters the S-shaped oil passage of the aluminum plate heat sink from the casing. The fan blows away the heat dissipated by the aluminum plate heat sink, and the hot oil, after becoming cold oil, returns to the liquid-cooled charging module casing.

[0047] In specific manufacturing, a protective mesh cover is provided on the outside of the fan 32, and the perimeter of the protective mesh cover is connected to the outer shell 30 of the aluminum plate radiator 31. The protective mesh cover is used to protect the fan and prevent debris from entering the fan.

[0048] Figure 3 In the illustrated embodiment, the S-shaped oil path consists of nine loops. These nine loops lengthen the oil path, improving utilization and heat dissipation efficiency. The number of loops can be adjusted according to specific needs in practical applications. Simultaneously, the size of the aluminum plate heat sink and the fan airflow are calculated and determined based on the heat dissipation requirements of the liquid-cooled charging module. The following is the design process of the aluminum plate heat sink in the 480kW immersion charging pile embodiment:

[0049] 1. The total power of the charging pile is 480KW;

[0050] 2. Efficiency: 95%;

[0051] 3. The heat transfer oil has a specific heat capacity of 2000 J / kg and a specific gravity of 0.89;

[0052] 4. The specific heat capacity of air is 1005 J / kg, and its specific gravity is 1.2.

[0053] 5. Maximum ambient temperature: 50 degrees Celsius;

[0054] 6. The temperature difference between cold oil and hot oil is 10 degrees Celsius;

[0055] 7. The exhaust capacity of the fan is 2*5500 cubic meters per hour;

[0056] 8. The total cross-sectional area of ​​the inner bore of the oil guide tube = 3.14 * 162 = 16.1 square centimeters;

[0057] (a) Calculate the flow rate of the heat transfer oil:

[0058] Total heat load = 480 * 0.05 = 24KW, leaving a 10% margin, total heat load = 26.67KW;

[0059] After the hot oil is cooled by the cooling system, the oil temperature drops by 10 degrees, i.e., ΔT = 10℃.

[0060] The flow rate of the heat transfer oil = [60 (seconds) * 26.67 * 10³] / [2000 (specific heat capacity) * 10 (degrees) * 0.89 (specific gravity)]

[0061] =89.9 liters per minute;

[0062] (ii) The temperature rise of the air at the outlet of the fan = 26670 / [1005 (specific heat capacity) * 1.2 (specific gravity) * 3.055 (air volume)] = 7.24 degrees Celsius;

[0063] The air temperature at the air outlet is 57.24 degrees Celsius.

[0064] Conversely, to keep the air temperature rise below 7 degrees Celsius, an air volume of 11,000 cubic meters per hour is required, and the fan specifications should be selected accordingly.

[0065] (III) Calculation of aluminum panel radiator area: Aluminum profile heat dissipation coefficient = 45W / M 2 .K, the coefficient of performance of finned aluminum profile radiators is increased by 3-5 times, and by 3-4 times when exposed to strong winds.

[0066] In summary, the heat dissipation coefficient of the finned aluminum radiator under strong winds is 45 (W) * 3 (multiple) * 3 (multiple) = 405 W / m 2 ·K;

[0067] The total area of ​​the aluminum panel radiator = 26670 / 405 = 65.85 square meters;

[0068] If the temperature difference between the oil inlet and outlet of an aluminum plate radiator is 10 degrees Celsius, then the area required for heat dissipation is 6.585 square meters.

[0069] The aluminum plate radiator has a length of 1060 - 2 * 60 = 940 mm, a thickness of 140 mm, a height of 540 mm, and 49 oil guide pipes (i.e., internal oil passages).

[0070] Total area of ​​the oil guide tube = 0.94 (length) * 0.14 (width) * 49 * 2 (surface) = 12.9 square meters;

[0071] The total surface area of ​​both sides = 0.54 (height) * 0.94 (length) * 2 (sides) = 1.02 square meters;

[0072] The area of ​​the heat dissipation strip = 0.14 (width) * 0.008 (height) * 148 * 2 * 49 = 16.24 square meters;

[0073] Total heat dissipation area = 30.16 square meters, effective coefficient 0.7 (temperature gradient effect), effective heat dissipation area = 21.12 square meters;

[0074] If the coefficient of the aluminum profile heat sink with upper fins is taken as 3, then the minimum effective heat dissipation area is 7.04 square meters.

[0075] The radiator has a surface area of ​​6.585 square meters, which exceeds the minimum required area for heat dissipation. This radiator design is reasonable.

[0076] As a preferred configuration, the charging power module cage 52 may be one or more. Figure 4 In the embodiment shown, there are two charging power module cages; each charging power module cage 52 is provided with multiple charging power modules 4. The top of the charging power module cage 52 is provided with an oil inlet pipe 521 and the bottom is provided with an oil outlet pipe 522. The inlet of the oil inlet pipe 521 and the outlet of the oil outlet pipe 522 are respectively connected to the air-cooled heat dissipation module 3 and the oil pump 2. The number of oil inlet pipes 521 and oil outlet pipes 522 corresponds to the number of charging power module cages, that is, one charging power module cage has an oil inlet pipe at its top and an oil outlet pipe at its bottom.

[0077] like Figure 9 , 10 As shown, the oil inlet pipe 521 and oil outlet pipe 522 are respectively provided with oil inlet nozzles 523 (X1, X2, X3, X4, X5, X6, ..., XN) and oil outlet nozzles 524 (C1, C2, C3, C4, C5, C6, ..., CN) corresponding to the multiple charging power modules 4. The inner diameter XN (N=1, 2, 3...) of the oil inlet nozzles 523 increases sequentially along the end direction of the oil inlet pipe 521, while the inner diameter CN (N=1, 2, 3...) of the oil outlet nozzles 524 decreases sequentially along the oil outlet direction of the oil outlet pipe 522. The total cross-sectional area of ​​the inner holes of the oil inlet nozzles 523 and 524 is slightly larger than the inner cross-sectional area of ​​the oil inlet pipe 521 and oil outlet pipe 522. Both the inlet pipe 521 and the outlet pipe 522 are made of stainless steel. The end of the outlet pipe 522 is equipped with a pipe fitting 54. The pipe fitting can be designed as a threaded head, a pagoda head, a chuck, etc., depending on the specific requirements.

[0078] exist Figure 4 In the illustrated embodiment, the liquid-cooled charging module housing contains two charging power module cages, and the oil inlet pipe 521 at the top can be combined into one (e.g., Figure 7 As shown), there are two oil outlet pipes 522 at the bottom, and the oil outlet nozzles 524 on the two oil outlet pipes 522 are CN (N=1, 2, 3...) and DN (N=1, 2, 3...), respectively. Figure 8 As shown.

[0079] In specific embodiments of this utility model, such as Figure 7 ,8 As shown, the charging power module cage 52 includes a frame 520, a wiring copper busbar 525, plug-in terminals 526, and an insulating post 527. The charging power module 4 is disposed inside the frame 520. The wiring copper busbar 525 is connected to the charging power module 4 through the plug-in terminals 526. An insulating post 527 is provided between the wiring copper busbar 525 and the charging power module 4. The wiring copper busbar 525 and the outgoing copper busbar 528 are connected in an L-shape. The wiring copper busbar 525 is horizontally disposed at the bottom of the charging power module 4. The outgoing copper busbar 528 is disposed on the outside of the frame 520 on the side of the charging power module 4 and is connected to the junction box 50.

[0080] In the specific production process, such as Figure 4 As shown, a level gauge 53 is provided on the side wall of the liquid-cooled charging module housing 51 for easy observation of the heat transfer oil level inside the housing; the top of the housing 51 is provided with a top cover (not shown in the figure), which is sealed to the top of the housing 51. Meanwhile, guide rails (not shown in the figure) are provided on two opposite sides inside the frame 520 to cooperate with the charging power module 4, allowing the charging power module 4 to enter and exit the frame 520 along the guide rails.

[0081] In the specific design, the oil pump 2 is a magnetic pump, and the inlet of the oil pump 2 is equipped with a filter 7; the oil storage tank 1 is equipped with an oil filler 8, a temperature sensor 9, and a pressure relief valve 11; the oil pipe between the oil storage tank 1 and the air-cooled heat dissipation module 3 is equipped with a flow meter 12 and a pressure gauge 13. The pressure relief valve provides safety protection, the temperature sensor detects the oil temperature to control the oil pump, thereby controlling the oil flow of the liquid-cooled charging module and adjusting the fan speed; the oil filler is used to fill the oil storage tank, fill the oil pump head, and vent the heat dissipation system (during initial use). The hot oil in the oil storage tank 1 is driven by the oil pump to the inlet of the flow meter, pressure gauge, and air-cooled heat dissipation module. The flow meter is used to measure the oil flow of the heat dissipation system, the pressure gauge is used to detect the oil pressure, and the air-cooled heat dissipation module is used for heat dissipation; the hot oil flows through nine loops in the air-cooled heat dissipation module until it flows out from the oil outlet as cold oil, and then returns to the housing of the liquid-cooled charging module through the oil inlet pipe to absorb heat, completing a cycle of heat dissipation, and this cycle repeats continuously.

[0082] This utility model also provides a charging pile, such as Figure 9 As shown, the charging pile includes a charging power module 4 and the aforementioned novel liquid cooling heat dissipation device. The charging pile also includes an integrated control module 6, with the junction box 50 of the novel liquid cooling heat dissipation device connected to the integrated control module 6. The integrated control module 6 is used to control the operation of the charging pile. Figure 9 The charging pile shown has an air-cooled heat dissipation module at the top, an integrated control module in the middle, and a liquid-cooled charging module at the bottom.

[0083] The heat dissipation principle of this charging station is as follows: Figure 10As shown, when the charging power module charges the electric vehicle through the charging guns (gun A and gun B), the heat generated by the charging power module, which is immersed in the heat transfer oil, is directly conducted to the heat transfer oil. The heat transfer oil absorbs the heat from the charging power module and becomes hot oil, which circulates to the air-cooled heat dissipation module driven by the oil pump. The heat is dissipated by a fan and an aluminum plate heat sink. The cooled heat transfer oil then returns to the liquid-cooled charging module's housing under the drive of the oil pump. This continuous cycle ensures that the heat from the charging power module is constantly dissipated. The entire process operates smoothly under the management of the integrated control module, which controls the charging pile, the liquid cooling device, metering and billing, and information exchange. The control methods used are all existing technologies and will not be described in detail here. In the diagram, +1 / -1 represents the copper busbar connecting gun A, +2 / -2 represents the copper busbar connecting gun B, and + / - indicates polarity.

[0084] To further optimize the above solution, the charging gun is immersed in heat-conducting oil and connected in parallel with the liquid-cooled charging module in the oil circuit of a new liquid-cooling heat dissipation device. The heat-conducting oil dissipates heat from the charging gun head, absorbing the heat and circulating it to the air-cooled heat dissipation module for further cooling before returning to the charging gun head. This continuous circulation ensures the charging gun operates normally. This solution utilizes heat-conducting oil to simultaneously cool both the charging power module and the charging gun head, ensuring the all-weather adaptability of the liquid-cooled charging pile. Simultaneously, it eliminates the need for a separate small cooling system on the liquid-cooled charging gun, reducing the cost of a fully liquid-cooled charging pile.

[0085] like Figure 11-14As shown, the integrated control module 6 includes a main control board 14, an auxiliary power supply 15, signal terminals 16, a power distribution DC contactor 17, an output DC contactor 18, a DC dual-channel meter 19, a fan 20, an adapter board 21, a shunt 22, a fuse 23, an input copper busbar 24, and an output copper busbar 25. The DC dual-channel meter 19 and the fan 20 are mounted on the front panel of the integrated control module. This integrated control module 6 has already been disclosed in the invention patent "A Highly Integrated Intelligent Charging Pile" (Announcement No. CN113771659B), and will not be described in detail here. In actual operation, the main control board 14 acts as the brain of the charging pile, controlling various functional components and communicating with the outside world through the signal terminal 16. There are three auxiliary power supplies 15: one main control auxiliary power supply and two BMS power supplies. There are two power distribution DC contactors 17 used for power distribution; four output DC contactors 18 are used for controlling the DC output of charging guns A and B; two shunts 22 detect the current of charging guns A and B; a DC dual-channel meter 19 measures the charging amount of guns A and B; and a fan 20 provides heat dissipation for the integrated control module. Multiple input copper busbars 24 are used to connect to the junction box of the charging power module, and multiple output copper busbars are used to connect charging guns A and B. This embodiment uses a dual-gun charging configuration; when designing for multi-gun charging, the integrated control module will be modified accordingly. The integrated control module organically integrates functions such as charging control, power distribution, background communication, and human-machine interaction.

[0086] In summary, this utility model has the advantages of compact structure and good heat dissipation, which can continuously dissipate heat and cool the charging power module, extend the service life of electronic components in the charging pile, improve the environmental adaptability of the charging pile, and make its cost performance far superior to other liquid-cooled charging pile solutions, water-cooled charging pile solutions and air-cooled charging pile solutions on the market, thus having good economic and social benefits.

[0087] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A novel liquid-cooled heat dissipation device, characterized in that: The device includes an oil storage tank, an oil pump, an air-cooled heat dissipation module, and a liquid-cooled charging module for cooling the charging power module inside the charging pile. The outlet of the liquid-cooled charging module is connected to the inlet of the oil pump through an oil guide pipe. The outlet of the oil pump is connected to the inlet of the oil storage tank through an oil guide pipe. The outlet of the oil storage tank is connected to the inlet of the air-cooled heat dissipation module through an oil guide pipe. The outlet of the air-cooled heat dissipation module is connected to the inlet of the liquid-cooled charging module through an oil guide pipe. The liquid-cooled charging module includes a hollow sealed housing. Inside the housing is a charging power module cage and heat transfer oil. The charging power module cage contains a charging power module, which is immersed in the heat transfer oil. The inlet and outlet of the housing are connected to an air-cooled heat dissipation module and an oil pump, respectively. A junction box is provided on the outside of the housing. The inputs and outputs of multiple charging power modules are connected to the corresponding AC contactors and integrated control modules in the charging pile through the junction box.

2. The novel liquid-cooled heat dissipation device according to claim 1, characterized in that: The air-cooled heat dissipation module includes an aluminum plate heat sink and a fan. The aluminum plate heat sink has oil tanks on both sides. One oil tank has an oil inlet connected to an oil storage tank on its upper side, and the other oil tank has an oil outlet connected to the liquid-cooled heat dissipation module on its lower side. The two oil tanks are separated into multiple continuous curved S-shaped oil passages by multiple baffles. The fan is located on one side of the S-shaped oil passage and is used to cool the heat transfer oil in the S-shaped oil passage.

3. The novel liquid-cooled heat dissipation device according to claim 1, characterized in that: The charging power module cage may be one or more, and each charging power module cage contains multiple charging power modules. The top of the charging power module cage is provided with an oil inlet pipe and the bottom with an oil outlet pipe. The inlet of the oil inlet pipe and the outlet of the oil outlet pipe are respectively connected to the air-cooled heat dissipation module and the oil pump. The oil inlet pipe and the oil outlet pipe are respectively provided with oil inlet nozzles and oil outlet nozzles corresponding to the charging power modules.

4. The novel liquid-cooled heat dissipation device according to claim 3, characterized in that: The charging power module cage of the liquid-cooled charging module includes a frame, copper busbars, pluggable terminals, and insulating posts. The charging power module is disposed inside the frame. The copper busbars are connected to the charging power module through pluggable terminals. An insulating post is provided between the copper busbars and the charging power module. The copper busbars and the outgoing copper busbars are connected in an L-shape. The copper busbars are horizontally disposed at the bottom of the charging power module. The outgoing copper busbars are disposed on the outside of the charging power module cage and connected to the junction box.

5. A novel liquid-cooled heat dissipation device according to claim 4, characterized in that: The liquid-cooled charging module rack has guide rails on two opposite sides inside, which cooperate with the charging power module. The charging power module can enter and exit the rack along the guide rails.

6. A novel liquid-cooled heat dissipation device according to claim 3, characterized in that: The inner diameter of the oil inlet nozzle gradually increases along the end of the oil inlet pipe, and the inner diameter of the oil outlet nozzle gradually decreases along the oil outlet direction of the oil outlet pipe; the total cross-sectional area of ​​the inner bore of the oil inlet nozzle and the oil outlet nozzle is greater than the inner cross-sectional area of ​​the oil inlet pipe and the oil outlet pipe.

7. The novel liquid-cooled heat dissipation device according to claim 1, characterized in that: The heat transfer oil has a breakdown voltage of over 30KV and a kinematic viscosity of less than 20 mm at 40℃. 2 / s.

8. A novel liquid-cooled heat dissipation device according to claim 1, characterized in that: The liquid-cooled charging module has a liquid level gauge on the side wall of its housing, and a top cover on the top of the housing, which is sealed to the top of the housing.

9. A novel liquid-cooled heat dissipation device according to claim 1, characterized in that: The oil pump is a magnetic pump, and the inlet of the oil pump is equipped with a filter; the oil storage tank is equipped with an oil filler, a temperature sensor and a pressure relief valve; the oil guide pipe between the oil storage tank and the air-cooled heat dissipation module is equipped with a flow meter and a pressure gauge.

10. A charging pile, characterized in that: It includes a charging power module and a novel liquid cooling heat dissipation device as described in any one of claims 1-9.

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