Direct current liquid cooling flat wire charging gun

Abstract

The utility model relates to the technical field of new energy electric vehicles, and discloses a direct current liquid cooling flat wire charging gun, which comprises a main shell, a gun head and a cable, an annular shell is arranged in the main shell, the cable is in a flat wire shape, two liquid cooling pipes are respectively arranged in the cable corresponding to each DC terminal, a conductor wire core is arranged in each liquid cooling pipe in a penetrating manner, and the conductor wire core is connected with the gun head. Two sealing cavities are formed in the annular shell, one sealing cavity is communicated with the two liquid cooling pipes corresponding to one DC terminal, one liquid cooling pipe inputs cooling liquid into the sealing cavity, the other liquid cooling pipe outputs the cooling liquid from the sealing cavity, and the DC terminal is communicated with the two corresponding conductor wire cores in the sealing cavity. The direct current liquid cooling flat wire charging gun improves the current-carrying capacity and the heat dissipation capacity of the charging gun during charging, is particularly suitable for a high-power quick charging scene, effectively solves the heat dissipation problem in a high-voltage and high-current environment, and in addition, the flat wire type cable not only improves the high-power charging heating problem, but also is convenient to operate and use.

Description

Technical Field

[0001] This utility model relates to the field of new energy electric vehicle technology, and in particular to a DC liquid-cooled flat wire charging gun. Background Technology

[0002] With the increasing popularity of electric vehicles, the demand for high-power fast charging is growing daily. Traditional charging guns are prone to overheating during high-power charging, affecting charging efficiency and safety. Air cooling technology suffers from low heat dissipation efficiency and high noise, while liquid cooling technology has leakage problems and safety hazards in high-power charging scenarios, requiring technological improvements. In addition, the addition of heat dissipation design to charging cables increases cross-sectional area and weight, making them inconvenient to use. Utility Model Content

[0003] The purpose of this invention is to provide a DC liquid-cooled flat wire charging gun that solves the overheating problem of traditional charging guns during high-power charging, thereby improving charging efficiency, safety, and ease of use.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A DC liquid-cooled flat wire charging gun includes a main housing, a gun head disposed at a first end of the main housing, and a cable passing through a second end of the main housing and electrically connected to the gun head. The main housing is provided with an annular shell fixed to the gun head, and the annular shell is provided with two DC terminals, which are respectively exposed above the gun head.

[0006] The cable is a flat cable type, with two liquid cooling tubes for each DC terminal. The four liquid cooling tubes are arranged side by side along the cross-sectional length of the cable, and each liquid cooling tube has a conductor core.

[0007] The annular shell has two sealed cavities. One sealed cavity is connected to two liquid cooling pipes corresponding to a DC terminal. One liquid cooling pipe inputs coolant into the sealed cavity, and the other liquid cooling pipe outputs coolant from the sealed cavity. The DC terminal is connected to the two corresponding conductor cores in the sealed cavity.

[0008] As an alternative, the sealing cavity is connected to the two corresponding liquid cooling pipes via a sealing joint. One end of the sealing joint is inserted into the sealing cavity, and a first sealing ring is sandwiched between the sealing joint and the sealing cavity. The other end of the sealing joint is provided with a connecting part that is respectively interference-fitted into the two liquid cooling pipes.

[0009] As an alternative, the outer edge of the sealing joint is fastened to the annular shell with screws, and a fastening ring is provided on the outside of the liquid cooling pipe to tighten the liquid cooling pipe and the connection.

[0010] As an alternative, a limiting step is provided on the inner wall of the second end of the main housing, a second sealing ring is sleeved on the cable, and a locking structure is provided on the cable. The locking structure is used to keep the second sealing ring in a state of pressing the limiting step.

[0011] As an alternative, the locking structure includes a first pressure block, a second pressure block, and a retaining latch. The first pressure block and the second pressure block can be combined to clamp the cable, and the retaining latch is used to keep the first pressure block and the second pressure block in the combined state.

[0012] As an alternative, the first pressure block and the second pressure block are combined to form a conical surface, and a fixing buckle is sleeved on the conical surface. The fixing buckle is connected to the first pressure block and / or the second pressure block by screws.

[0013] As an alternative, the first pressing block is provided with a limit groove, and the second pressing block is provided with a positioning buckle that can be inserted into the limit groove.

[0014] As an alternative, several anti-slip protrusions are provided on the inner walls of both the first and second pressing blocks.

[0015] As an optional solution, a third sealing ring is provided between the DC terminal and the gun head.

[0016] As an optional solution, a fourth sealing ring is provided between the gun head and the main housing.

[0017] The beneficial effects of this utility model are:

[0018] This DC liquid-cooled flat cable charging gun improves the current carrying capacity and heat dissipation capacity during charging. In particular, the cooling structure connecting the sealed cavity with two liquid cooling pipes enhances heat dissipation efficiency and charging safety, making it especially suitable for high-power fast charging scenarios. It effectively solves the heat dissipation problem under high voltage and high current conditions. In addition, the flat cable not only improves the heat generation problem of high-power charging but also facilitates operation and use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external appearance of the DC liquid-cooled flat wire charging gun provided in this embodiment of the utility model;

[0020] Figure 2 This is a cross-sectional view of the DC liquid-cooled flat wire charging gun provided in this embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure between the cable and the annular shell according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the locking structure involved in an embodiment of the present utility model.

[0023] In the attached image:

[0024] 1. Main housing; 2. Gun head; 3. Cable; 4. Annular shell; 5. DC terminal; 6. Liquid cooling pipe; 7. Conductor core; 8. Sealing cavity; 9. Sealing joint; 10. First sealing ring; 11. Fastening ring; 12. Second sealing ring; 13. First pressure block; 14. Second pressure block; 15. Fixing latch; 16. Limiting groove; 17. Positioning buckle; 18. Third sealing ring; 19. Fourth sealing ring. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0030] Please see Figures 1 to 4 As shown, this embodiment provides a DC liquid-cooled flat wire charging gun, including a main housing 1, a gun head 2 disposed at the first end of the main housing 1, and a cable 3 that passes through the second end of the main housing 1 and is electrically connected to the gun head 2. The main housing 1 is provided with an annular shell 4 fixed to the gun head 2, and the annular shell 4 is provided with two DC terminals 5, which are respectively exposed above the gun head 2.

[0031] The cable 3 is a flat wire type. Two liquid cooling tubes 6 are provided in the cable 3 corresponding to each DC terminal 5. The four liquid cooling tubes 6 are arranged side by side along the cross-sectional length of the cable 3. A conductor core 7 is threaded through each liquid cooling tube 6.

[0032] The annular shell 4 is provided with two sealing cavities 8. One sealing cavity 8 is connected to two liquid cooling pipes 6 corresponding to a DC terminal 5. One of the liquid cooling pipes 6 inputs coolant into the sealing cavity 8, and the other liquid cooling pipe 6 outputs coolant from the sealing cavity 8. The DC terminal 5 and the two corresponding conductor cores 7 are connected in the sealing cavity 8.

[0033] This improves the current-carrying capacity and heat dissipation capacity of the charging gun during charging. In particular, the cooling structure connecting the sealed cavity 8 with the two liquid cooling pipes 6 enhances heat dissipation efficiency and charging safety, making it especially suitable for high-power fast charging scenarios. It effectively solves the heat dissipation problem under high-voltage and high-current conditions. In addition, the flat cable 3 improves the heat dissipation problem of high-power charging and solves the problem of the cable 3 being difficult to handle due to its thickness, making it easy to bend and move.

[0034] Optionally, the sealing cavity 8 is connected to the two corresponding liquid cooling pipes 6 by a sealing joint 9. One end of the sealing joint 9 is inserted into the sealing cavity 8, and a first sealing ring 10 is sandwiched between the sealing joint 9 and the sealing cavity 8. The other end of the sealing joint 9 is provided with a connecting part that is respectively interference-fitted into the two liquid cooling pipes 6.

[0035] Therefore, the sealing joint 9 ensures the sealing performance of the sealing cavity 8 and the heat dissipation effect at the connection between the DC terminal 5 and the conductor core 7, prevents coolant leakage, ensures stable current transmission, extends the service life of the equipment, and improves the overall charging efficiency and safety.

[0036] The first sealing ring 10 includes a main sealing layer and an auxiliary sealing layer. The main sealing layer is used to prevent coolant leakage, and the auxiliary sealing layer is used to prevent dust and impurities from entering. The termination of the DC terminal 5 and the conductor core 7 is achieved by ultrasonic welding to reduce heat generation in the conductive parts and improve current carrying capacity.

[0037] Furthermore, the outer edge of the sealing joint 9 is fastened to the annular shell 4 by screws, and a fastening ring 11 for clamping the liquid cooling pipe 6 and the connecting part is provided on the outside of the liquid cooling pipe 6.

[0038] This ensures a tight fit between the sealing joint 9 and the annular shell 4 and the liquid cooling pipe 6, enhances structural stability, prevents loosening, ensures sealing and heat dissipation during long-term use, and further improves the overall performance and reliability of the charging gun.

[0039] Optionally, a limiting step is provided on the inner wall of the second end of the main housing 1, a second sealing ring 12 is sleeved on the cable 3, and a locking structure is provided on the cable 3. The locking structure is used to keep the second sealing ring 12 in the state of pressing the limiting step.

[0040] Therefore, by squeezing the second sealing ring 12 through the locking structure, the position of the second sealing ring 12 is ensured to be accurate, so as to reliably seal the gap between the cable 3 and the main housing 1, prevent external impurities from entering the main housing 1, and ensure the working performance of the internal electrical components.

[0041] Furthermore, the locking structure includes a first pressure block 13, a second pressure block 14, and a fixing latch 15. The first pressure block 13 and the second pressure block 14 can be combined into one unit to clamp the cable 3, and the fixing latch 15 is used to keep the first pressure block 13 and the second pressure block 14 in the combined state.

[0042] Therefore, by combining the first pressure block 13 and the second pressure block 14 and locking them with the fixing latch 15, the locking structure can be stabilized on the cable 3, so as to form a lasting top pressure on the second sealing ring 12, effectively preventing the sealing function of the second sealing ring 12 from failing, further improving the sealing performance and durability of the overall structure, and ensuring the stable operation of the charging gun in complex environments.

[0043] Optionally, when the first pressing block 13 and the second pressing block 14 are combined, they form a conical surface. The fixing buckle 15 is sleeved on the conical surface, and the fixing buckle 15 is connected to the first pressing block 13 and / or the second pressing block 14 by screws.

[0044] In this embodiment, the first pressure block 13 is sleeved on the cable 3, and the first pressure block 13 is provided with a notch. The shape of the second pressure block 14 is adapted to the notch, so that the first pressure block 13 and the second pressure block 14 can be combined into one body to ensure reliable clamping of the cable 3. The fixing buckle 15 is sleeved on the combination of the first pressure block 13 and the second pressure block 14 and fixed by screws. In this embodiment, the fixing buckle 15 is fixed to the first pressure block 13 to ensure the stability and detachability of the locking structure.

[0045] Furthermore, the first pressing block 13 is provided with a limiting groove 16, and the second pressing block 14 is provided with a positioning buckle 17 that is inserted into the limiting groove 16.

[0046] Therefore, by cooperating with the positioning buckle 17 through the limiting groove 16, the first pressing block 13 and the second pressing block 14 are precisely aligned during assembly, thereby enhancing the assembly accuracy and stability of the locking structure.

[0047] Optionally, a number of anti-slip protrusions are provided on the inner wall of the first pressing block 13 and the inner wall of the second pressing block 14.

[0048] Therefore, by having the anti-slip protrusions make close contact with the outer surface of the cable 3, the friction is increased, preventing the cable 3 from sliding within the locking structure, thus further improving the stability and reliability of the locking structure.

[0049] Optionally, a third sealing ring 18 is provided between the DC terminal 5 and the gun head 2.

[0050] Therefore, the third sealing ring 18 ensures the sealing between the DC terminal 5 and the gun head 2, preventing coolant leakage and the intrusion of external impurities, and ensuring the reliability and safety of the electrical connection.

[0051] Optionally, a fourth sealing ring 19 is provided between the gun head 2 and the main housing 1.

[0052] Therefore, the fourth sealing ring 19 ensures the sealing between the gun head 2 and the main housing 1, preventing external impurities and moisture from entering, further improving the overall protection level of the structure, ensuring that the charging gun works stably in various environments, and extending its service life.

[0053] In summary, this DC liquid-cooled flat wire charging gun has the following characteristics:

[0054] 1) Flat cable design 3: Each DC terminal 5 uses two liquid cooling pipes 6. In terms of heat dissipation, the flat shape allows for a larger contact area with the coolant, enabling the transfer of more heat per unit time and resulting in higher heat dissipation efficiency. In high-power charging scenarios, the flat cable 3 can dissipate the heat generated by the cable 3 more quickly, keeping the cable 3 temperature within a safe range and ensuring the safety and stability of charging. In terms of space utilization, it is easier to lay out and install. The flat shape makes it easier to arrange and install in narrow spaces or complex wiring environments. The bending radius is smaller. With the same number of core wires, the bending radius is smaller than that of round cables, thus better adapting to different bending angles and installation environments during use.

[0055] 2) Unique cooling structure design: A sealed cavity 8 is formed at the connection between DC terminal 5 and conductor core 7, through which coolant can flow. It also has multiple cooling circulation paths, which connect the inside and outside of the coolant to form a circulation channel, thus achieving better cooling performance.

[0056] 3) Integrated water channel sealing design: An integrated sealing design is adopted between the annular shell 4 and the liquid cooling pipe 6 to ensure that the coolant will not leak to the outside during circulation; the depth and width of the sealing cavity 8 are optimized to ensure that the corresponding sealing rings can fit tightly, and each sealing ring is made of high temperature and corrosion resistant elastic material silicone.

[0057] 4) Main housing 1 sealing design: Made of high-strength insulating material, and corresponding sealing rings are designed at the joints of the gun head 2 and the tail cable 3 to ensure the overall structure is sealed and prevent external dust and impurities from entering.

[0058] 5) Modular design with locking structure: easy to assemble and operate, and the output end has an IP67 protection rating, ensuring reliable sealing.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A direct current liquid-cooled flat wire charging gun, comprising a main shell (1), a gun head (2) arranged at a first end of the main shell (1), and a cable (3) penetrating from a second end of the main shell (1) and electrically connected with the gun head (2), characterized in that, The main shell (1) is provided with an annular shell (4) fixed with the gun head (2), and two DC terminals (5) are arranged on the annular shell (4), and the two DC terminals (5) respectively expose the gun head (2); The cable (3) is a flat wire type, and two liquid cooling pipes (6) are arranged in the cable (3) corresponding to each DC terminal (5), and four liquid cooling pipes (6) are arranged side by side along the cross-sectional length direction of the cable (3), and a conductor wire core (7) is arranged in each liquid cooling pipe (6); The annular shell (4) is provided with two sealing cavities (8), one of the sealing cavities (8) is communicated with two liquid cooling pipes (6) corresponding to one DC terminal (5), and one of the liquid cooling pipes (6) inputs cooling liquid into the sealing cavity (8), and the other liquid cooling pipe (6) outputs cooling liquid from the sealing cavity (8), and the DC terminal (5) is conducted in the sealing cavity (8) with the corresponding two conductor wire cores (7).

2. The direct current liquid-cooled flat wire charging gun of claim 1, wherein, The sealing cavity (8) and the corresponding two liquid cooling pipes (6) are connected through a sealing joint (9), one end of the sealing joint (9) is inserted into the sealing cavity (8), and a first sealing ring (10) is arranged between the sealing joint (9) and the sealing cavity (8), and the other end of the sealing joint (9) is provided with a connecting part which is inserted into two liquid cooling pipes (6) respectively.

3. The direct current liquid-cooled flat wire charging gun of claim 2, wherein, The outer edge of the sealing joint (9) is fastened with the annular shell (4) through screws, and a fastening ring (11) is arranged outside the liquid cooling pipe (6) for clamping the liquid cooling pipe (6) and the connecting part.

4. The direct current liquid-cooled flat wire charging gun of claim 1, wherein, A limiting step is arranged on the inner wall of the second end of the main shell (1), a second sealing ring (12) is arranged on the cable (3), and a locking structure is arranged on the cable (3), which is used to make the second sealing ring (12) in the state of pressing the limiting step.

5. The direct current liquid-cooled flat wire charging gun of claim 4, wherein, The locking structure comprises a first pressing block (13), a second pressing block (14) and a fixed lock buckle (15), the first pressing block (13) and the second pressing block (14) can be combined into one to clamp the cable (3), and the fixed lock buckle (15) is used to make the first pressing block (13) and the second pressing block (14) keep in the combined state.

6. The direct current liquid-cooled flat wire charging gun of claim 5, wherein, When the first pressing block (13) and the second pressing block (14) are combined, a tapered surface is formed, the fixed lock buckle (15) is arranged on the tapered surface, and the fixed lock buckle (15) is connected with the first pressing block (13) and / or the second pressing block (14) through screws.

7. The direct current liquid-cooled flat wire charging gun of claim 5, wherein, A limiting groove (16) is arranged on the first pressing block (13), and a positioning buckle (17) is arranged on the second pressing block (14) and inserted into the limiting groove (16).

8. The direct current liquid-cooled flat wire charging gun of claim 5, wherein, A plurality of anti-skid protrusions are arranged on the inner wall of the first pressing block (13) and the inner wall of the second pressing block (14).

9. The direct current liquid-cooled flat wire charging gun of claim 1, wherein, A third sealing ring (18) is arranged between the DC terminal (5) and the gun head (2).

10. The direct current liquid-cooled flat wire charging gun of claim 1, wherein, A fourth sealing ring (19) is arranged between the gun head (2) and the main shell (1).

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