A liquid-cooled cable and charging pile for new energy vehicles

Abstract

This invention discloses a liquid-cooled cable and charging pile for new energy vehicles. When the liquid-cooled cable is applied to a charging pile to charge an electric vehicle, during operation, the refrigerant in the liquid-cooling pipe of the cable body passes through the first passage chamber, the second passage chamber, the first one-way valve, and the second one-way valve of the power supply connector, forming two convection flows with opposite directions. One of the diverted refrigerants flows into the charging pile for cooling and then flows back to the power supply connector. When the refrigerant in the liquid-cooling pipe of the cable body flows to the charging connector, the two interconnected liquid passage chambers facilitate the refrigerant to flow back through one of them. Therefore, the refrigerant in the liquid-cooling pipe can achieve liquid circulation in the charging connector, the cable body, the power supply connector, and the charging pile, thereby efficiently cooling the heated conductors and control core wires in the cable body and improving charging efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of cooling cable structures for automobiles, specifically relating to a liquid-cooled cable and charging pile for new energy vehicles. Background Technology

[0002] The electrification of automobiles has become the new mainstream, gradually replacing traditional fuel vehicles. Currently, the market penetration rate of new energy vehicles in China has exceeded 10%, meaning that electric vehicles account for more than 10% of the increase in new car sales, and this is expected to exceed 30% by 2025. Currently, it takes at least 30 minutes to charge a private new energy passenger vehicle to 80%. This is mainly due to the continuous heating at the connection points between conductors and terminals during long-term charging with high current, forcing the charging station to limit the current as the temperature rises. This situation not only greatly limits charging efficiency and increases charging time, but also poses a fire hazard due to severe cable heating.

[0003] Given the rapid development of the new energy vehicle industry, there is an urgent need to develop a new type of charging pile that can meet the requirements of high-current supercharging, shorten charging time, and extend the service life of the charging pile. Therefore, there is still room for improvement. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a liquid-cooled cable for new energy vehicles and its charging pile, which can reduce the heat generation of the cable during charging and thus improve the charging efficiency.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A liquid-cooled cable for new energy vehicles includes a cable body, a charging connector, and a power supply connector. The cable body includes an insulating sleeve, and conductors, control core wires, and a liquid-cooling tube disposed within the insulating sleeve. The charging connector is located at the end of the cable body and includes a base, a shunt plate, and a charging plug connected in sequence. The base has a cavity, the opening of which is located at the end of the cable body. The shunt plate has two interconnected liquid-cooling chambers, and a channel is provided in the middle of the shunt plate between the two liquid-cooling chambers. The end of the cable body is located within the cavity. The conductors and control core wires of the cable body pass through the channel and are electrically connected to the charging plug. The power supply connector is located at the other end of the cable body. At one end, the power supply connector includes a base, a convection plate, and a power supply plug connected in sequence. The base has a receiving cavity, the opening of which is located at the end of the cable body. The convection plate has a first passage chamber and a second passage chamber that are relatively closed. The inner wall of the first passage chamber is provided with a first one-way valve, and the inner wall of the second passage chamber is provided with a second one-way valve. The first one-way valve and the second one-way valve are in opposite directions. The convection plate has a through-hole in the middle, which is located between the first passage chamber and the second passage chamber. The power supply plug has two water inlets that are respectively connected to the first one-way valve and the second one-way valve. The end of the cable body is located in the receiving cavity. The conductor and control core wire of the cable body pass through the through-hole and are electrically connected to the power supply plug.

[0007] Furthermore, connecting rings are provided on the outer periphery of both ends of the cable body, and an annular connecting part is provided on the inner circumferential surface of the cavity opening, the annular connecting part being detachably adapted to the connecting ring; an annular mounting part is provided on the inner circumferential surface of the cavity opening of the receiving cavity, the annular mounting part being detachably adapted to the connecting ring.

[0008] Furthermore, a flexible sealing element is provided between the conductors and control cores of the cable body and the channel, and a flexible sealing element is provided between the conductors and control cores of the cable body and the opening.

[0009] Furthermore, in the cable body, there are at least two liquid cooling pipes, which are independent of the conductors and control core wires, and the conductors and control core wires are close to the liquid cooling pipes.

[0010] Furthermore, in the cable body, the liquid cooling pipe is an annular liquid cooling pipe, the conductor is disposed inside the annular liquid cooling pipe, and the portion of the annular liquid cooling pipe located in the chamber or receiving cavity has an opening, through which the conductor can pass into the channel or through-hole.

[0011] Furthermore, the liquid cooling tube is disposed inside the wire, and the end of the liquid cooling tube located in the chamber or receiving cavity extends out of the wire.

[0012] A charging pile includes the aforementioned liquid-cooled cable for new energy vehicles, a charging pile body, a power supply unit, and a cooling unit. The charging pile body is provided with a connecting plate, which has two start-up water inlets. The power supply plate is connected to the connecting plate, and two water inlets of the power supply plate are respectively connected to the two start-up water inlets. The power supply unit is disposed within the charging pile body and is electrically connected to the connecting plate, supplying power externally through the liquid-cooled cable. The cooling unit is disposed within the charging pile body, and the liquid-cooled pipe of the cable body enters the cooling unit through the two water inlets, using the cooling unit to cool and circulate the refrigerant within the liquid-cooled pipe.

[0013] Furthermore, the refrigeration unit includes a condensate tank, a water pump, and a return pipe. The return pipe is disposed in the condensate tank. One end of the return pipe is connected to one of the start-up water inlets via the water pump, and the other end of the return pipe is connected to another start-up water inlet via a pipe.

[0014] Furthermore, the start-up water inlet includes a perforated seat, a fixed plate, an elastic element, and a sealing ball. The perforated seat is disposed on the charging pile body and has a through hole. The fixed plate is disposed on the perforated seat and faces the through hole. One end of the elastic element is connected to the fixed plate, and the sealing ball is connected to the other end of the elastic element. The sealing ball abuts against the opening of the through hole through the elastic action of the elastic element. A water inlet is provided on the outer peripheral surface of the water connector. When the water connector is inserted into the through hole, the water connector squeezes the sealing ball, and the inside of the through hole is connected to the liquid cooling pipe through the water inlet.

[0015] The present invention has the following beneficial effects:

[0016] 1. When the liquid-cooled cable for new energy vehicles of the present invention is applied to a charging pile and used to charge an electric vehicle, during operation, the refrigerant in the liquid-cooling pipe of the cable body passes through the first passage chamber, the second passage chamber, the first one-way valve, and the second one-way valve of the power supply connector, forming two convection flows with opposite directions. One of the diverted refrigerants flows into the charging pile for cooling and then flows back to the power supply connector. When the refrigerant in the liquid-cooling pipe of the cable body flows to the charging connector, due to the two interconnected liquid passage chambers, the refrigerant can easily flow back through one of the liquid passage chambers. Therefore, the refrigerant in the liquid-cooling pipe can achieve liquid circulation in the charging connector, the cable body, the power supply connector, and the charging pile, thereby facilitating efficient cooling of the heated conductors and control core wires in the cable body, and thus improving charging efficiency.

[0017] 2. The charging pile of the present invention adopts a liquid-cooled cable for new energy vehicles. The power supply unit can transmit power to the outside through the liquid-cooled cable, while the cooling unit can cool down the liquid-cooled pipe in the cable body and realize the flow and circulation of the coolant. Therefore, when charging the car, the liquid-cooled pipe in the cable body can cool down the heated wires and control core wires in time to improve charging efficiency, and can better meet the requirements of high current overcharging and shorten charging time, and extend the service life of the liquid-cooled cable and the charging pile. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the liquid-cooled cable for new energy vehicles according to the present invention.

[0019] Figure 2 This is one of the cross-sectional views of the cable body of the present invention.

[0020] Figure 3 This is a second cross-sectional view of the cable body of the present invention.

[0021] Figure 4 This is the third cross-sectional view of the cable body of the present invention.

[0022] Figure 5 This is a schematic diagram of the charging connector of the present invention.

[0023] Figure 6 This is a cross-sectional view of the charging connector of the present invention.

[0024] Figure 7 This is a schematic diagram of the power supply connector of the present invention.

[0025] Figure 8 This is a cross-sectional view of the power supply connector of the present invention.

[0026] Figure 9 This is a schematic diagram of the liquid-cooled cable for new energy vehicles of the present invention applied to a charging pile.

[0027] In the picture:

[0028] 1. Cable body; 11. Insulation sleeve; 12. Conductor; 13. Control core wire; 14. Liquid cooling pipe;

[0029] 2. Charging connector; 21. Base; 211. Chamber; 22. Diverter plate; 221. Liquid passage chamber; 223. Channel; 23. Charging socket;

[0030] 3. Power supply connector; 31. Base; 311. Receiving cavity; 32. Convection plate; 321. First passage chamber; 322. Second passage chamber; 323. First check valve; 324. Second check valve; 325. Port; 33. Power supply plug; 331. Water connector; 332. Water inlet; 333. Metal ring;

[0031] 4. Charging pile; 41. Connecting plug; 42. Power supply unit; 43. Cooling unit. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Terms such as “upper,” “inner,” “middle,” “left,” “right,” and “one” used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention. Example

[0033] A liquid-cooled cable for new energy vehicles, such as Figures 1 to 8 As shown, the device includes a cable body 1, and charging connectors 2 and power supply connectors 3 respectively disposed at both ends of the cable body 1; the charging connector 2 is used to connect to the car battery to supply power to the car; the power supply connector 3 is used to connect to a charging pile 4, and the power generated by the charging pile 4 can be used to supply power to external devices through the liquid-cooled cable of this invention (e.g., Figure 9 ).

[0034] The cable body 1 of the present invention includes an insulating sleeve 11, and a conductor 12, a control core wire 13, and a liquid cooling pipe 14 disposed within the insulating sleeve 11. The number of conductors 12, control core wires 13, and liquid cooling pipes 14 can be adjusted according to actual needs. The liquid cooling pipes 14 are filled with refrigerant, which is used to cool the conductors 12 and control core wires 13 in the cable body 1 during operation, so as to improve charging efficiency, thereby meeting the requirements of high current overcharging and shortening charging time, and extending the service life of the liquid-cooled cable and the charging pile 4.

[0035] The charging connector 2 of the present invention includes a base 21, a current distribution plate 22 disposed on the base 21, and a charging plug 23 disposed on the end face of the current distribution plate 22 away from the base 21. In this embodiment, the base 21 and the current distribution plate 22 can be an integral structure formed by one piece, or they can be independent components assembled by screws or snap-fit. The charging plug 23 can be screwed and attached to the current distribution plate 22, and the connection between the charging plug 23 and the current distribution plate 22 will be sealed with a sealing ring or sealant to achieve a waterproof effect.

[0036] In this embodiment, connecting rings are provided on the outer periphery of both ends of the cable body 1. The base 21 has a cavity 211. An annular connecting part is provided on the inner circumferential surface of the cavity 211. The cavity 211 is detachably engaged with the connecting ring at the end of the cable body 1 through the annular connecting part. This detachable engagement can be a threaded engagement or an interference fit. Two interconnected liquid passage chambers 221 are provided in the diverter plate 22. A channel 223 is provided in the middle of the diverter plate 22. The channel 223 is located between the two liquid passage chambers 221 and is not connected to the liquid passage chambers 221. The end of the cable body 1 is located in the cavity 211. The conductor 12 and control core wire 13 of the cable body 1 are separated from the liquid cooling pipe 14 and pass through the channel 223 before being electrically connected to the charging plug 23. A flexible seal is provided between the conductor 12 and control core wire 13 of the cable body 1 and the channel 223. The flexible seal can be a flexible sealant or a flexible rubber plug.

[0037] The power connector 3 of the present invention includes a base 31, a convection plate 32 disposed on the base 31, and a power supply plug 33 disposed on the end face of the convection plate 32 away from the base 31. In this embodiment, the base 31 and the convection plate 32 can be an integral structure formed by one piece, or they can be independent components assembled by screws or snap-fit. The power supply plug 33 can be screwed and attached to the convection plate 32, and the connection between the power supply plug 33 and the convection plate 32 will be sealed with a sealing ring or sealant to achieve a waterproof effect.

[0038] In this embodiment, the base 31 has a receiving cavity 311, and an annular mounting part is provided on the inner circumferential surface of the cavity opening of the receiving cavity 311. The receiving cavity 311 is detachably engaged with the end of the cable body 1 through the annular mounting part. This detachable engagement can be a threaded engagement or an interference fit. The convection plate 32 is provided with a relatively closed first passage chamber 321 and a second passage chamber 322. A first one-way valve 323 is provided on the inner wall of the first passage chamber 321 near the power supply socket 33, and a second one-way valve 324 is provided on the inner wall of the second passage chamber 322 near the power supply socket 33. The flow directions of the first one-way valve 323 and the second one-way valve 324 are opposite. An opening 325 is provided in the middle of the convection plate 32, and the opening 325 is located between the first passage chamber 321 and the second passage chamber 322. Between them, and the cylinder opening is not connected to the first passage chamber 321 and the second passage chamber 322. The end face of the power supply plug 33 away from the convection plate 32 is provided with two water connectors 331 that are respectively connected to the first one-way valve 323 and the second one-way valve 324. The water connectors 331 are set outward, so the cooling function of the refrigerant in the liquid cooling pipe 14 in the cable body 1 and the water circulation function can be realized by connecting to the external water circulation system. The end of the cable body 1 is located in the receiving cavity 311. After the wire 12 and the control core wire 13 of the cable body 1 pass through the opening 325, they are electrically connected to the power supply plug 33. Among them, a flexible sealing element is provided between the wire 12 and the control core wire 13 of the cable body 1 and the opening 325. The flexible sealing element can be a flexible sealant or a flexible rubber plug.

[0039] Based on this, when the liquid-cooled cable for new energy vehicles of the present invention is applied to the charging pile 4 and used to charge the electric vehicle, during operation, the refrigerant in the liquid-cooled pipe 14 in the cable body 1 passes through the first passage chamber 321, the second passage chamber 322, the first one-way valve 323, and the second one-way valve 324 of the power supply connector 3, forming two convection flows with opposite directions. One of the diverted refrigerants flows into the charging pile 4 to achieve cooling and then flows back to the power supply connector 3. When the refrigerant in the liquid-cooled pipe 14 of the cable body 1 flows to the charging connector 2, due to the two connected liquid passage chambers 221, the refrigerant can easily flow back through one of the liquid passage chambers 221. Therefore, the refrigerant in the liquid-cooled pipe 14 can achieve liquid circulation in the charging connector 2, the cable body 1, the power supply connector 3, and the charging pile 4, thereby facilitating efficient cooling of the heated wires 12 and control core wires 13 in the cable body 1, and thus improving charging efficiency. Meanwhile, in practical applications, the liquid-cooled cable for new energy vehicles and the corresponding charging pile 4 of the present invention can achieve a charging capacity of 80% in 10 minutes, which is 20 minutes shorter than the charging time of ordinary charging pile 4. Therefore, it can better meet the requirements of high current overcharging and shortening charging time, and extend the service life of liquid-cooled cable and charging pile 4.

[0040] To improve the versatility of the liquid-cooled cable of the present invention and to meet the cooling needs of cable bodies 1 with different structures, the following detailed description of adaptive improvements to different cable bodies 1 is provided:

[0041] 1) such as Figure 2 As shown, in the cable body 1, there are at least two liquid cooling pipes 14. The liquid cooling pipes 14 are independent of the conductors 12 and the control core wires 13. The conductors 12 and the control core wires 13 are close to the liquid cooling pipes 14 so as to use the liquid cooling pipes 14 to cool the conductors 12 and the control core wires 13 when they are heated during operation. The liquid cooling pipes 14 are divided into two parts. The two parts of the liquid cooling pipes 14 achieve convection through the first passage 321 and the second passage 322, thereby facilitating the function of water circulation cooling in the liquid cooling pipes 14 within the cable body 1.

[0042] 2) such as Figure 3 As shown, in the cable body 1, the liquid cooling pipe 14 is an annular liquid cooling pipe 14. This annular liquid cooling pipe 14 is composed of two pipes of different sizes connected together. The refrigerant flows within the annular channel 223, while the conductor 12 is placed inside the annular liquid cooling pipe 14. The portion of the annular liquid cooling pipe 14 located within the chamber 211 or receiving cavity 311 has an opening, allowing the conductor 12 to pass through the opening and enter the channel 223 or through-hole 325. Therefore, interference between the conductor 12 and the annular liquid cooling pipe 14 can be reduced.

[0043] 3) such as Figure 4 As shown, the liquid cooling pipe 14 is disposed inside the wire 12. The end of the liquid cooling pipe 14 located in the chamber 211 or the receiving chamber 311 extends out of the wire 12 so as to separate the liquid cooling pipe 14 and the wire 12, thereby realizing the functions of power supply and cable cooling. Example

[0044] Example 2 mainly applies the liquid-cooled cable for new energy vehicles from Example 1 to the charging pile 4, thereby forming a product that can be implemented. The following describes the charging pile 4 of the present invention.

[0045] A type of charging pile 4, such as Figures 1 to 9 As shown, the system includes a liquid-cooled cable for new energy vehicles (as described in Embodiment 1), a charging pile 4 main body, and a power supply unit 42 and a cooling unit 43 mounted on the charging pile 4 main body. The liquid-cooled cable for new energy vehicles is connected to the charging pile 4 main body via a power supply connector 3, enabling the connection of the cable body 1's conductors 12 and control information to the power supply unit 42. The liquid-cooling pipe 14 of the cable body 1 is connected to the cooling unit 43 via the power supply connector 3. Therefore, when charging a vehicle using the charging pile 4 and the liquid-cooled cable, the power supply unit 42 operates to supply power externally, and the cooling unit 43 operates to cool the refrigerant flowing into the cable body 1 and circulate the water.

[0046] The charging pile 4 is equipped with a connecting plate 41, which is used to connect the power supply plate 33 of the liquid cooling cable. The connecting plate 41 is equipped with two start-up water inlets, which correspond to two water inlets 331 respectively. The power supply plate 33 is connected to the connecting plate 41, and the two water inlets 331 of the power supply plate 33 are connected to the two start-up water inlets respectively.

[0047] The power supply unit 42 is installed inside the main body of the charging pile 4. The power supply unit 42 can adopt a municipal power supply system or a solar power supply system, etc. The power supply unit 42 is electrically connected to the connecting plug 41 and supplies power to the outside through a liquid-cooled cable.

[0048] The cooling unit 43 is installed inside the main body of the charging pile 4. The liquid cooling pipe 14 of the cable body 1 enters the cooling unit 43 through two water inlet connectors 331. The cooling unit 43 is used to cool the refrigerant in the liquid cooling pipe 14 and circulate water.

[0049] The refrigeration unit 43 in this embodiment includes a condensation tank, a water pump, and a return pipe. The return pipe is installed inside the condensation tank. One end of the return pipe is connected to a start-up water inlet via the water pump, and the other end is connected to another start-up water inlet via a pipe. Therefore, after the liquid-cooled pipe 14 exchanges heat with the wire 12 and the control core wire 13, it transmits hot water to the refrigeration unit 43. The condensation tank cools the hot water, and then the pumping action of the water pump transmits the cold water back to the liquid-cooled pipe 14 of the cable body 1. This achieves the cooling of the refrigerant and water circulation within the liquid-cooled pipe 14, while also meeting the requirements of high-current overcharging, shortening charging time, and extending the service life of the liquid-cooled cable and the charging pile 4.

[0050] In this embodiment, the start-up water supply interface includes a perforated seat, a fixed plate, an elastic element, and a sealing ball. The perforated seat is mounted on the main body of the charging pile 4 and has a through hole. The fixed plate is L-shaped and is mounted on the perforated seat. One end of the fixed plate is directly opposite the through hole. The elastic element can be a spring. One end of the elastic element is connected to the fixed plate, and the sealing ball is connected to the other end of the elastic element. The sealing ball abuts against the opening of the through hole through the elastic action of the elastic element to achieve automatic sealing.

[0051] The water inlet 331 of the power supply connector 3 has a water inlet 332 on its outer peripheral surface, and a metal ring 333 is embedded in the outer peripheral surface of the water inlet 331. A magnetic ring is embedded in the inner peripheral surface of the through hole. When the water inlet is inserted into the through hole, the metal ring 333 and the magnetic ring attract each other magnetically, so that the water inlet 331 remains relatively fixed. At the same time, the water inlet 331 squeezes the sealed ball so that the inside of the through hole is connected to the liquid cooling pipe 14 through the water inlet 332, thereby realizing the function of the refrigerant in the liquid cooling pipe 14 flowing with the refrigeration unit 43.

[0052] In summary, the charging pile 4 of the present invention adopts a liquid-cooled cable for new energy vehicles. The power supply unit 42 can transmit power to the outside through the liquid-cooled cable, while the cooling unit 43 can cool down the liquid-cooled pipe 14 in the cable body 1 and realize the flow and circulation of the coolant. Therefore, when charging the car, the liquid-cooled pipe 14 of the cable body 1 can cool down the heated wire 12 and control core wire 13 in time to improve the charging efficiency, and can better meet the requirements of high current overcharging and shortening the charging time, and extend the service life of the liquid-cooled cable and the charging pile 4.

[0053] The embodiments of the present invention are not limited thereto. Based on the above description of the present invention, and using common technical knowledge and conventional means in the field, the present invention can be modified, replaced or combined in various other forms without departing from the basic technical idea of ​​the present invention, and all such modifications, replacements or combinations fall within the scope of protection of the present invention.

Claims

1. A liquid-cooled cable for new energy vehicles, characterized in that, include: The cable body includes an insulating sleeve, and conductors, control core wires, and liquid cooling pipes disposed within the insulating sleeve; A charging connector is disposed at the end of the cable body. The charging connector includes a base, a shunt plate, and a charging plug connected in sequence. The base has a cavity, the opening of which is located at the end of the cable body. The shunt plate has two interconnected liquid-passing chambers. A channel is provided in the middle of the shunt plate, the channel being located between the two liquid-passing chambers. The end of the cable body is located in the cavity. The conductors and control core wires of the cable body pass through the channel and are electrically connected to the charging plug. A power supply connector is located at the other end of the cable body. The power supply connector includes a base, a convection plate, and a power supply plug connected in sequence. The base has a receiving cavity, the opening of which is located at the end of the cable body. The convection plate has a first passage chamber and a second passage chamber that are relatively closed. The inner wall of the first passage chamber is provided with a first one-way valve, and the inner wall of the second passage chamber is provided with a second one-way valve. The first and second one-way valves are in opposite directions. A through-hole is provided in the middle of the convection plate, located between the first and second passage chambers. The power supply plug has two water inlets that are respectively connected to the first and second one-way valves. The end of the cable body is located in the receiving cavity. The conductors and control core wires of the cable body pass through the through-hole and are electrically connected to the power supply plug.

2. The liquid-cooled cable for new energy vehicles as described in claim 1, characterized in that, The outer periphery of both ends of the cable body is provided with a connecting ring, and the inner circumferential surface of the cavity opening is provided with an annular connecting part, which is detachably adapted to the connecting ring; the inner circumferential surface of the cavity opening of the receiving cavity is provided with an annular mounting part, which is detachably adapted to the connecting ring.

3. The liquid-cooled cable for new energy vehicles as described in claim 1, characterized in that, A flexible sealing element is provided between the conductors and control cores of the cable body and the channel, and a flexible sealing element is provided between the conductors and control cores of the cable body and the opening.

4. The liquid-cooled cable for new energy vehicles as described in claim 1, characterized in that, In the cable body, there are at least two liquid cooling tubes. The liquid cooling tubes are independent of the conductors and control cores, and the conductors and control cores are close to the liquid cooling tubes.

5. The liquid-cooled cable for new energy vehicles as described in claim 1, characterized in that, In the cable body, the liquid cooling pipe is an annular liquid cooling pipe, and the conductor is arranged inside the annular liquid cooling pipe. The portion of the annular liquid cooling pipe located in the chamber or receiving cavity has an opening, and the conductor can pass through the opening and enter the channel or through-hole.

6. The liquid-cooled cable for new energy vehicles as described in claim 1, characterized in that, The liquid cooling tube is disposed inside the conductor, and the end of the liquid cooling tube located in the chamber or receiving cavity extends out of the conductor.

7. A charging pile, characterized in that, include: Liquid-cooled cables for new energy vehicles as described in any one of claims 1 to 6; The charging pile body is provided with a connecting plate, which has two start-up water inlets. The power supply plate is connected to the connecting plate, and the two water inlets of the power supply plate are respectively connected to the two start-up water inlets. A power supply unit is installed inside the charging pile body. The power supply unit is electrically connected to the connecting plug and supplies power to the outside through the liquid-cooled cable. A refrigeration unit is installed inside the main body of the charging pile. The liquid cooling pipe of the cable body enters the refrigeration unit through two water inlets. The refrigeration unit is used to cool the refrigerant in the liquid cooling pipe and circulate water.

8. The charging pile as described in claim 7, characterized in that, The refrigeration unit includes a condensate tank, a water pump, and a return pipe. The return pipe is disposed in the condensate tank. One end of the return pipe is connected to one of the start-up water inlets via the water pump, and the other end of the return pipe is connected to another start-up water inlet via a pipe.

9. The charging pile as described in claim 7, characterized in that, The start-up water inlet includes a perforated seat, a fixed plate, an elastic element, and a sealing ball. The perforated seat is mounted on the charging pile body and has a through hole. The fixed plate is mounted on the perforated seat and faces the through hole. One end of the elastic element is connected to the fixed plate, and the sealing ball is connected to the other end of the elastic element. The sealing ball abuts against the opening of the through hole through the elastic force of the elastic element. A water inlet is provided on the outer circumferential surface of the water connector. When the water connector is inserted into the through hole, the water connector squeezes the sealing ball, and the inside of the through hole is connected to the liquid cooling pipe through the water inlet.

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