Direct current liquid cooling charging gun for new energy European standard automobile

Abstract

The utility model discloses a direct current liquid cooling charging gun for a new energy European standard automobile. The liquid cooling charging gun comprises a gun shell, a plug shell, a mounting seat, a liquid cooling box, a plurality of direct current terminals and a multi-core cable, the liquid cooling box comprises an n-shaped box body in threaded connection with the mounting seat, a middle sealing block and an outer cover plate, the direct-current terminal is sleeved with a plug shell and the mounting seat in front and back, a rear end plate of the direct-current terminal extends into a heat conduction groove of the box body, and an outer vertical wall of the direct-current terminal is attached to a vertical cavity of the flow channel; the tail end of the multi-core cable is fixedly sleeved with the tail end of the gun shell, a plurality of direct-current wires of the multi-core cable penetrate through an inner cavity of the gun shell and are welded to the inner vertical wall of the rear end plate, two liquid cooling pipes of the multi-core cable are symmetrically and directly connected with two vertical cavities, and a liquid cooling loop is formed to cool a heating area. According to the utility model, the direct-current terminal can work at a proper temperature, the performance of the terminal is efficient and stable, the charging speed is fast, and the safety is high.

Description

Technical Field

[0001] This utility model relates to the field of charging guns, and in particular to a DC liquid-cooled charging gun for new energy European standard vehicles. Background Technology

[0002] With the rapid development of new energy vehicles, when high-power charging (such as fast DC charging) is used, a large amount of heat is generated when the charging gun is connected to the power terminals of the charging socket. This has several drawbacks: First, the resistance of the DC terminals of the charging gun is positively correlated with temperature rise. High temperatures cause the DC terminals and related components to continuously heat up, affecting terminal performance and thus reducing charging speed. Second, when the charging gun operates under continuous overload, it may cause the wires to overheat, burn, or even short-circuit, posing potential safety risks and affecting charging safety. Third, the electronic components inside the charging gun operate at continuously high temperatures, causing frequent equipment shutdowns and unstable operation, resulting in low charging efficiency, long vehicle charging times, and potentially affecting the lifespan of components. Utility Model Content

[0003] To address one or more of the aforementioned problems, this utility model provides a DC liquid-cooled charging gun for new energy European standard vehicles.

[0004] According to one aspect of the present invention, the new energy European standard vehicle DC liquid-cooled charging gun includes: a gun shell, a plug shell fixedly connected to the front of the gun shell, and a mounting base sleeved in the rear cavity of the plug shell, and also includes a liquid cooling box, multiple DC terminals, and a multi-core cable.

[0005] The liquid cooling box includes a U-shaped box body with a threaded connection mounting base, a middle sealing block and an outer cover plate. The box body is provided with a U-shaped flow channel with a rear opening and a stepped sealing groove at the opening of the flow channel. The middle sealing block is sealed and fitted to the stepped sealing groove. The outer cover plate is fixedly connected to the secondary sealing flow channel on the outer wall of the box body.

[0006] The DC terminal is connected to the plug housing and mounting base at the front and rear, and its rear end plate extends into the heat conduction groove of the box and its outer wall is in contact with the vertical cavity of the flow channel.

[0007] The multi-core cable is fixedly sleeved at the end of the gun housing. Its multiple DC wires pass through the inner cavity of the gun housing and are welded to the inner wall of the rear end plate. Its two liquid cooling pipes are symmetrically connected to the two vertical cavities to form a liquid cooling circuit to cool down the heat-generating area.

[0008] In some embodiments, the housing is an open-end shell made of thermally conductive polymer plastic by injection molding. The housing has a C-shaped through-hole heat conduction groove in the middle, and the flow channel is a ∩-shaped structure formed by symmetrically connecting two vertical cavities at the lower end of the transverse cavity.

[0009] In some embodiments, the outline dimensions of the central sealing block are the same as those of the stepped sealing groove. The upper end plate of the central sealing block is provided with a connecting seat and its two lower plates are provided with side suspension seats. The cap end of the screw is located in the connecting seat or the side suspension seat and the column end is threaded to the housing.

[0010] In some embodiments, screw holes are provided on both sides of the transverse cavity and on one side of the lower end of each vertical cavity, and screws are connected to the screw holes by passing through the through holes of the connecting seat or the side suspension seat.

[0011] In some embodiments, the two vertical ends of the central sealing block are integrally and symmetrically connected to two liquid inlet and outlet ports that communicate with the vertical cavity, and the straight plug at the end of the liquid cooling pipe is connected to the liquid inlet and outlet ports.

[0012] The outer shoulder of the inlet and outlet is interference-fitted to the straight-through connector, its external thread is connected to the internal thread of the straight-through connector, and its internal anti-loosening pawl is connected to the ratchet of the straight-through connector.

[0013] In some embodiments, a pad is provided in the middle of the central sealing block, the inner wall of the central sealing block is attached to the wall of the stepped sealing groove, and the pad and the rear end wall of the box are flush with and attached to the outer cover plate.

[0014] In some implementations, an interference fit is made between the inner and outer end grooves of the pad and the stepped sealing groove, forming a sealing ring.

[0015] In some implementations, the housing and outer cover are laser-welded together, and the two lugs and mounting bases at the upper end of the housing are fixedly connected by screws.

[0016] In some embodiments, the mounting base is pre-clamped into the rear cavity of the plug housing, and multiple axial threaded posts in the inner cavity of the gun housing pass through the first U-shaped through hole of the mounting base and enter the second U-shaped through hole of the housing. Screws pass through the through hole of the plug housing and are threaded to the axial threaded posts, thereby achieving a fixed connection between the gun housing, the plug housing, the mounting base and the liquid cooling box.

[0017] In some implementations, the multi-core cable includes four DC conductors and two liquid cooling tubes;

[0018] The I-shaped baffle at the rear end of the mounting base extends into the heat conduction groove. On both sides of the baffle, the front end plate of every two DC wires is welded to the rear end plate.

[0019] This new energy European standard DC liquid-cooled charging gun for automobiles features a built-in liquid-cooling structure with continuously circulating coolant to cool the heat-generating area, ensuring the charging gun remains in a suitable charging state. Its benefits include: First, continuous heat dissipation keeps the DC terminals at a suitable operating temperature, resulting in efficient and stable terminal performance and fast charging speed; Second, continuous operation at a suitable temperature eliminates potential safety risks, ensuring high charging safety; Third, continuous operation at a suitable temperature ensures stable and uninterrupted equipment operation, high charging efficiency, short single-charge time, and long component lifespan; Fourth, the liquid-cooling box adopts a U-shaped structure, providing ample space for DC terminals and multi-core cable connections, facilitating assembly design; Fifth, the heat-generating area directly contacts the flow channel sidewall, enabling rapid heat dissipation and quick heat exchange; Sixth, the liquid-cooling box uses a central sealing block and an outer cover plate for secondary sealing, ensuring high overall sealing performance and preventing coolant leakage that could damage internal electronic equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a DC liquid-cooled charging gun for European standard new energy vehicles according to one embodiment of the present invention.

[0021] Figure 2 for Figure 1 The diagram shows a 3D representation of the removal of the gun housing and liquid cooling box from the DC liquid-cooled charging gun for European standard new energy vehicles.

[0022] Figure 3 for Figure 2 A three-dimensional schematic diagram of the liquid cooling box shown;

[0023] Figure 4 for Figure 2 The diagram shows a three-dimensional exploded view of the liquid cooling box.

[0024] Figure 5 for Figure 2 A three-dimensional schematic diagram of the multi-core cable and DC terminals shown;

[0025] Gun casing 1; grip handle 11; plug casing 2; mounting base 3; partition 31;

[0026] Liquid cooling box 4, box body 40, flow channel 400, stepped sealing groove 401, heat conduction groove 402, vertical cavity 403, horizontal cavity 404, screw hole block 405, lug seat 406, second U-shaped perforation 407, middle sealing block 41, connecting seat 411, side suspension seat 412, pad block 413, outer cover plate 42, liquid inlet and outlet 43;

[0027] DC terminal 5, rear end plate 51;

[0028] 6. Multi-core cable, 60. Straight connector, 61. DC wire, 62. Liquid cooling pipe, 63. Front end board;

[0029] 7. Cable locking block; 8. Sealing ring; 9. PE pin; 10. Signal pin. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, while the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0031] Figures 1 to 5 The figure schematically illustrates a DC liquid-cooled charging gun for European standard new energy vehicles according to one embodiment of the present invention. As shown in the figure, the DC liquid-cooled charging gun for European standard new energy vehicles includes: a gun housing 1, a plug housing 2 fixedly connected to the front of the gun housing 1, and a mounting base 3 sleeved in the rear cavity of the plug housing 2; it also includes a liquid cooling box 4, multiple DC terminals 5, and a multi-core cable 6.

[0032] The liquid cooling box 4 includes a U-shaped box body 40, a central sealing block 41, and an outer cover plate 42, which are connected to the threaded mounting base 3.

[0033] The housing 40 is provided with a rear-opening ∩-shaped flow channel 400 and a stepped sealing groove 401 at the opening of the flow channel 400. Preferably, the housing 40 is a rear-opening shell made of high-molecular plastic injection molding. The housing 40 is provided with a lower-opening C-shaped through-hole heat conduction groove 402 in the middle. The flow channel 400 is a ∩-shaped structure formed by symmetrically connecting two vertical cavities 403 at the lower end of a transverse cavity 404.

[0034] The central sealing block 41 is fitted into the stepped sealing groove 401 for sealing, and the outer cover plate 42 is fixedly connected to the secondary sealing flow channel 400 on the outer wall of the box body 40. Preferably, the box body 40 and the outer cover plate 42 are laser welded into one piece, and the two ear seats 406 at the upper end of the box body 40 and the mounting seat 3 are fixedly connected by screws.

[0035] The DC terminal 5 is connected to the plug housing 2 and the mounting base 3 at the front and rear, and its rear end plate 51 extends into the heat conduction groove 402 of the box 40 and its outer wall is attached to the vertical cavity 403 of the flow channel 400.

[0036] The end of the multi-core cable 6 is fixedly sleeved to the tail end of the gun housing 1. Its multiple DC wires 61 pass through the inner cavity of the gun housing 1 and are welded to the inner vertical wall of the rear end plate 51. Its two liquid cooling pipes 62 are symmetrically connected to the two vertical cavities 403 to form a liquid cooling circuit to cool down the heat-generating area.

[0037] This new energy European standard DC liquid-cooled charging gun for automobiles features a built-in liquid-cooling structure with continuously circulating coolant to cool the heat-generating area, ensuring the charging gun remains in a suitable charging state. Its benefits are: First, the continuous dissipation of heat from the charging gun keeps the DC terminal 5 at a suitable operating temperature, resulting in efficient and stable terminal performance and fast charging speed. Second, the continuous operation of the charging gun at a suitable temperature eliminates potential safety risks, ensuring high charging safety. Third, the continuous operation of the charging gun at a suitable temperature ensures stable equipment operation without interruptions, high charging efficiency, short single-charge time, and long component lifespan. Fourth, the liquid-cooling box 4 adopts a U-shaped structure, providing ample space for the connection of the DC terminal 5 and the multi-core cable 6, facilitating assembly design. Fifth, the heat-generating area directly contacts the sidewall of the flow channel 400, enabling rapid heat dissipation and quick heat exchange. Sixth, the liquid-cooling box 4's body 40 uses a secondary seal with a central sealing block 41 and an outer cover plate 42, ensuring high overall sealing performance and preventing liquid coolant leakage that could damage internal electronic equipment.

[0038] Preferably, the outline dimensions of the central sealing block 41 are the same as those of the stepped sealing groove 401. The upper end plate of the central sealing block 41 is provided with a connecting seat 411 with a forward-protruding structure, and its two lower plates are provided with side suspension seats 412 protruding forward. The head end of the screw is located in the connecting seat 411 or the side suspension seat 412, and the column end is threaded to the housing 40. Preferably, screw hole blocks 405 are provided on both sides of the transverse cavity 404, and a screw hole block 405 is provided on one side of the lower end of each vertical cavity 403. The screw passes through the through hole of the connecting seat 411 or the side suspension seat 412 and connects to the screw hole block 405. Its advantages are: the structure is simple, the overall size is small, and the installation accuracy is high.

[0039] Furthermore, the two vertical ends of the central sealing block 41 are integrally and symmetrically connected to the inlet and outlet ports 43 of the two communicating vertical cavities 403. The straight-through connector 60 at the end of the liquid cooling pipe 62 is connected to the inlet and outlet ports 43. The outer shoulder of the inlet and outlet port 43 is interference-fitted to the straight-through connector 60, its external thread is connected to the internal thread of the straight-through connector 60, and its internal anti-loosening pawl is connected to the ratchet of the straight-through connector 60. The beneficial effect is that this setting ensures the tightness of the pipeline connection, prevents detachment during long-term use, and has high safety performance.

[0040] Furthermore, a pad 413 is provided in the middle of the central sealing block 41. The depth of the stepped sealing groove 401 is the same as the thickness of the central sealing block 41. The inner wall of the central sealing block 41 fits against the groove wall of the stepped sealing groove 401, and the pad 413 is flush with the rear end wall of the housing 40 and fits against the outer cover plate 42. Preferably, an inner end groove and an outer end groove are formed between the pad 413 and the inner and outer groove walls of the stepped sealing groove 401, respectively, and an interference fit sealing ring is made in the inner and outer end grooves. The beneficial effect is that this arrangement has high sealing performance and improves safety performance.

[0041] Furthermore, the mounting base 3 is pre-locked into the rear end cavity of the plug housing 2. Multiple axial threaded posts in the inner cavity of the gun housing 1 pass through the first U-shaped through hole of the mounting base 3 and enter the second U-shaped through hole 407 of the housing 40. Screws pass through the through hole of the plug housing 2 and are threadedly connected to the axial threaded posts, thereby achieving a fixed connection between the gun housing 1, plug housing 2, mounting base 3, and liquid cooling box 4. Its advantages are: this setup enables modular operation; the front-end connection can be achieved with a single set of screws, simplifying the structure and reducing component costs.

[0042] Furthermore, the multi-core cable 6 includes four DC conductors 61 and two liquid cooling pipes 62; the I-shaped partition 31 at the rear end of the mounting base 3 extends into the heat conduction groove 402, and on both sides of the partition 31, the front end plate 63 of every two DC conductors 61 is welded to the upper and lower ends of the inner wall of the rear end plate 51. Its beneficial effect is that this arrangement effectively isolates the various connection areas, avoiding mutual interference.

[0043] Furthermore, the gun casing 1 is fitted with a sealing ring 8 and threaded with a cable locking block 7. The end of the multi-core cable 6 passes through the sealing ring 8 and enters the inner cavity of the gun casing 1 through the cable locking block 7. The beneficial effect is that this setting makes the multi-core cable 6 securely fixed and has high sealing performance.

[0044] Preferably, the inner bushing of the plug housing 2 connects the PE pin 9 and the signal pin 10.

[0045] Preferably, the side end of the gun casing 1 is also provided with a grip handle 11. The advantage of this is that this design makes it easier to hold and use.

[0046] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. DC liquid-cooled charging gun for new energy European standard vehicles, including: The gun housing (1), the plug housing (2) fixedly connected to the front of the gun housing (1) and the mounting base (3) sleeved in the rear cavity of the plug housing (2) are characterized in that they also include a liquid cooling box (4), multiple DC terminals (5) and a multi-core cable (6). The liquid cooling box (4) includes a U-shaped box body (40) after the threaded connection mounting base (3), a middle sealing block (41) and an outer cover plate (42). The box body (40) is provided with a U-shaped flow channel (400) with a rear opening and a stepped sealing groove (401) provided at the opening of the flow channel (400). The middle sealing block (41) is sealed and fitted to the stepped sealing groove (401). The outer cover plate (42) is fixedly connected to the outer wall of the box body (40) to provide secondary sealing of the flow channel (400). The DC terminal (5) is connected to the plug shell (2) and the mounting base (3) at the front and rear, and its rear end plate (51) extends into the heat conduction groove (402) of the box (40) and its outer wall is attached to the vertical cavity (403) of the flow channel (400). The end of the multi-core cable (6) is fixedly sleeved to the tail end of the gun shell (1). Multiple DC wires (61) pass through the inner cavity of the gun shell (1) and are welded to the inner wall of the rear end plate (51). Two liquid cooling pipes (62) are symmetrically connected to two vertical cavities (403) to form a liquid cooling circuit to cool down the heating area.

2. The liquid-cooled charging gun of claim 1, wherein, The box (40) is a rear open shell made of high-molecular plastic with good thermal conductivity by injection molding. The box (40) has a C-shaped heat conduction groove (402) in the middle. The flow channel (400) is a transverse cavity (404) with two vertical cavities (403) symmetrically connected at the lower end to form a ∩-shaped structure.

3. The liquid-cooled charging gun of claim 2, wherein, The outline dimensions of the middle sealing block (41) are the same as those of the stepped sealing groove (401). The upper end plate of the middle sealing block (41) is provided with a connecting seat (411) and its two lower plates are provided with side suspension seats (412). The cap end of the screw is located in the connecting seat (411) or the side suspension seat (412) and the screw end is threadedly connected to the box body (40).

4. The liquid-cooled charging gun of claim 3, wherein, The transverse cavity (404) has screw holes (405) on both sides and each vertical cavity (403) has a screw hole (405) on one side of the lower end. The screw passes through the through hole of the connecting seat (411) or the side suspension seat (412) to connect the screw hole (405).

5. The liquid-cooled charge gun of claim 2, wherein, The two vertical ends of the central sealing block (41) are integrally and symmetrically connected to the inlet and outlet ports (43) of the two communicating vertical cavities (403), and the straight plug (60) at the end of the liquid cooling pipe (62) is connected to the inlet and outlet ports (43). The outer shoulder of the inlet / outlet port (43) is interference-fitted to the straight plug connector (60), its outer thread is connected to the inner thread of the straight plug connector (60), and its inner anti-loosening pawl is connected to the ratchet of the straight plug connector (60).

6. The liquid-cooled charge gun of claim 2, wherein, The middle sealing block (41) is also provided with a pad (413). The inner wall of the middle sealing block (41) is attached to the groove wall of the stepped sealing groove (401), and its pad (413) and the rear end wall of the box (40) are flush with the outer cover plate (42).

7. The liquid-cooled charging gun of claim 6, wherein, The inner and outer end grooves of the pad (413) and the stepped sealing groove (401) are fitted with interference-fit sealing rings.

8. The liquid-cooled charging gun of claim 6, wherein, The housing (40) and the outer cover plate (42) are laser welded together, and the two ear seats (406) and the mounting seat (3) at the upper end of the housing (40) are fixedly connected by screws.

9. The liquid-cooled charging gun according to any one of claims 1 to 8, characterized in that, The mounting base (3) is pre-attached to the rear end cavity of the plug housing (2). Multiple axial screw holes in the inner cavity of the gun housing (1) pass through the first U-shaped through hole of the mounting base (3) and enter the second U-shaped through hole (407) of the housing (40). Screws pass through the through hole of the plug housing (2) and are threaded to the axial screw holes, thereby achieving a fixed connection between the gun housing (1), the plug housing (2), the mounting base (3) and the liquid cooling box (4).

10. The liquid-cooled charging gun according to any one of claims 1 to 8, characterized in that, The multi-core cable (6) includes four DC conductors (61) and two liquid cooling pipes (62). The I-shaped partition (31) at the rear end of the mounting base (3) extends into the heat conduction groove (402). On both sides of the partition (31), the front end plate (63) of each pair of DC wires (61) is welded to the rear end plate (51).

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