Liquid cooling charging gun

Abstract

The utility model discloses a liquid cooling charging gun, which comprises a shell formed by plugging a plug shell and a handle shell, an inner cavity of the handle shell comprises a first inner cavity extending straightly and a second inner cavity extending downwards obliquely, the first inner cavity is in butt joint with the plug shell, a limiting seat is fixedly arranged on the inner end face of the plug shell, and the second inner cavity is in butt joint with the limiting seat. A pair of liquid cooling terminals is limited in the limiting seat, the liquid cooling terminals are arranged between the plug shell and the first inner cavity in a penetrating manner, the tail ends of the liquid cooling terminals are connected with cables and liquid cooling pipes, the cables and the liquid cooling pipes extend along the second inner cavity and extend out from the bottom of the handle shell, and a handle is arranged at the tail end of the handle shell; the front end face of the limiting seat is fixedly connected with a group of signal terminals which are arranged in the plug shell in a penetrating manner, the rear end face of the limiting seat is fixedly provided with an FPC (Flexible Printed Circuit), and the FPC is integrated with a group of pin headers which are connected with the group of signal terminals one by one. The liquid cooling charging gun is compact in structure.

Description

Technical Field

[0001] This utility model relates to the field of charging gun technology, and specifically to a liquid-cooled charging gun. Background Technology

[0002] As a crucial component, the long-term safety of the DC charging gun is a primary concern. During charging, significant heat is generated at the charging terminals and the connection between the cable and the external power source. High temperatures reduce charging efficiency and can damage the charging gun itself; overheating can even lead to a fire. Therefore, timely cooling of the terminals is essential to ensure the safe operation of the charging gun.

[0003] Conventional liquid-cooled terminals, as disclosed in publication number CN 117485155 A, typically have an independent cooling circuit for each terminal. This results in a complex internal structure and requires significant installation space. With the increasing frequency of charging gun usage, lighter and more portable charging guns are becoming a new demand. This necessitates reducing the size and weight of the charging gun to improve its user experience. Therefore, liquid-cooled terminals with independent cooling circuits are not conducive to optimizing the internal space layout of the charging gun. Thus, a new type of liquid-cooled terminal that is easy to install and has a small size is needed to accommodate more portable charging guns. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a liquid-cooled charging gun.

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

[0006] A liquid-cooled charging gun includes a housing formed by the insertion of a plug housing and a handle housing. The inner cavity of the handle housing includes a first inner cavity extending straight and a second inner cavity extending downwardly. The first inner cavity is connected to the plug housing. A limiting seat is fixed on the inner end face of the plug housing. A pair of liquid-cooled terminals are defined in the limiting seat. The liquid-cooled terminals pass through the plug housing and the first inner cavity, and their tail ends are connected to a cable and a liquid-cooling tube. The cable and liquid-cooling tube extend along the second inner cavity and extend out from the bottom of the handle housing. A handle is provided at the tail end of the handle housing. A set of signal terminals passing through the plug housing are fixed on the front end face of the limiting seat. An FPC flexible board is fixed on the rear end face of the limiting seat. A set of pin headers is integrated on the FPC flexible board to connect to the set of signal terminals one by one.

[0007] Preferably, the inner cavity of the handle housing includes a first inner cavity extending straight and a second inner cavity extending downwardly. The first inner cavity is connected to the plug housing, the tail end of the liquid-cooled terminal is located in the first inner cavity, and the cable and liquid-cooled pipe are located in the second inner cavity.

[0008] Preferably, the liquid-cooled terminal includes a terminal, an inner tube, and a connecting sleeve. The terminal is hollow and houses the inner tube. A first flow channel for coolant to flow is formed between the inner wall of the terminal and the outer wall of the inner tube. The hollow interior of the inner tube forms a second flow channel that communicates with the first flow channel. The connecting sleeve is fitted onto the outside of the tail end of the terminal and has a connecting branch pipe that communicates with the liquid-cooled pipe. The tail end of the terminal has a through hole that connects to the connecting branch pipe to communicate with the first flow channel and the connecting branch pipe. The tail end of the terminal is connected to an outer tube fitted onto the cable. A third flow channel that communicates with the second flow channel is formed between the outer tube and the cable. The liquid-cooled pipe, the connecting branch pipe, the first flow channel, the second flow channel, and the third flow channel are sequentially connected to form a liquid-cooled circuit.

[0009] Preferably, the limiting seat has two accommodating cavities symmetrically arranged extending into the first inner cavity. The liquid-cooled terminal is inserted from the bottom of the accommodating cavity, and a retaining ring is fixed on the outside of the liquid-cooled terminal. The diameter of the front end port of each accommodating cavity is smaller than that of the retaining ring so as to abut against the retaining ring to limit the axial position of the liquid-cooled terminal. The side of the accommodating cavity is provided with a groove that matches the connecting branch pipe, and the connecting branch pipe is engaged in the groove.

[0010] Preferably, the liquid cooling pipe includes two branch ports, each of which is connected to a connecting branch pipe.

[0011] Preferably, the cable and liquid cooling pipe are both inserted into a sleeve, which extends from the bottom of the handle housing. A cable fastener is provided at the bottom of the handle housing. The cable fastener is composed of two symmetrical half-shells joined together. A fixing member is fixed on the outer wall of the sleeve. The inner cavity of the half-shell matches the outer contour of the fixing member. The two half-shells are symmetrically engaged on both sides of the fixing member and screwed together to form the cable fastener, thus fixing it to the fixing member as a whole.

[0012] Preferably, a set of protrusions is provided on the inner wall of the semi-shell, and the protrusions abut against the outer wall of the sleeve.

[0013] Preferably, a sealing ring is provided at the connection between the cable fastener and the bottom of the handle housing.

[0014] Preferably, the top of the FPC flexible board is bent, and a set of pin headers is disposed on the bent portion of the FPC flexible board to connect one by one with a set of signal terminals.

[0015] Preferably, a mechanical lock and a micro switch are provided on the top of the handle housing. The mechanical lock is pivotally connected to the handle housing, the micro switch is located at the bottom of the mechanical lock, and a spring is abutting between the bottom of the mechanical lock and the top of the handle housing so that the mechanical lock can be pressed to trigger the micro switch.

[0016] Preferably, the handle housing is provided with a handle at its tail end.

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

[0018] 1. The housing is formed by plugging the plug housing and the handle housing together to facilitate the installation of internal components. A limit seat is set to limit the signal terminal and the liquid cooling terminal to facilitate installation. The handle housing is set as a first inner cavity and a second inner cavity with bending to shorten the axial length of the entire handle housing and shorten the axial distance between the handle and the center of gravity of the charging gun, so as to enhance the stability and hand-holding convenience of the user.

[0019] 2. Replace the conventional PCB board inside with a softer FPC flexible board. By bending the FPC flexible board to set up the pin header and signal terminal connection, the size of the FPC flexible board and the required installation space are reduced as much as possible, saving the internal space of the first inner cavity and making the entire internal structure of the first inner cavity more compact.

[0020] 3. Two liquid-cooled terminals share a single liquid-cooling tube to further save internal components, optimize the internal structure, make the internal components more compact, and thus reduce the overall size and weight;

[0021] 4. Both the cable and the liquid cooling pipe are threaded through the sleeve. The fixing device and the clamp work together to limit the position of the sleeve, thereby limiting the position of the cable and the liquid cooling pipe while avoiding squeezing the liquid cooling pipe. Attached Figure Description

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0023] Figure 1 : Schematic diagram of an embodiment of this utility model;

[0024] Figure 2 : Partial schematic diagram of an embodiment of this utility model;

[0025] Figure 3 Cross-sectional view of an embodiment of this utility model;

[0026] Figure 4 : Figure 3 An enlarged schematic diagram of part A in the middle. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0028] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the solution, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0029] like Figures 1 to 4 As shown, this utility model discloses a liquid-cooled charging gun, including a housing formed by inserting a plug housing 1 and a handle housing 2. The inner cavity of the handle housing 2 includes a first inner cavity 201 extending straight and a second inner cavity 202 extending downward. The first inner cavity 201 is connected to the plug housing 1. A limiting seat 5 is fixedly provided on the inner end face of the plug housing 1. A pair of liquid-cooled terminals 3 are defined in the limiting seat 5. The liquid-cooled terminals 3 pass through the plug housing 1 and the first inner cavity 201, and their tail ends are connected to a cable (not shown in the figure) and a liquid-cooling tube 7. The cable 7 and the liquid-cooling tube 7 extend along the second inner cavity 202 and extend out from the bottom of the handle housing 2. A handle is provided at the tail end of the handle housing 2. A set of signal terminals 4 passing through the plug housing 1 is fixedly connected to the front end face of the limiting seat 5. An FPC flexible board 6 is fixedly provided on the rear end face of the limiting seat 5. A set of pin headers 601 are integrated on the FPC flexible board 6 to connect one by one with the set of signal terminals 4.

[0030] This design uses a housing formed by the insertion of the plug housing 1 and the handle housing 2 to facilitate the installation of internal components. A limiting seat 5 is provided to define the signal terminal 4 and the liquid-cooled terminal 3 for easier installation. The handle housing 2 is configured with a bent first inner cavity 201 and a second inner cavity 202 to shorten the overall axial length of the handle housing 2, thereby shortening the axial distance between the handle and the center of gravity of the charging gun, enhancing the stability and ease of use for the user. The plug housing 1 and the handle housing 2 in this design can also be fixed together using other secure methods, such as adhesive bonding.

[0031] Furthermore, the liquid-cooled terminal 3 includes a terminal 302, an inner tube 303, and a connecting sleeve 304. The terminal 302 is hollow inside and houses the inner tube 303. A first flow channel 100 for coolant to flow is formed between the inner wall of the terminal 302 and the outer wall of the inner tube 303. The hollow interior of the inner tube 303 forms a second flow channel 200 that communicates with the first flow channel 100. The connecting sleeve 304 is sleeved on the outside of the tail end of the terminal 302 and has communication with the liquid-cooled pipe 7. The terminal 302 has a connecting branch pipe 305 at its tail end, which has a through hole 306 that connects to the connecting branch pipe 305 to connect the first flow channel 100 and the connecting branch pipe 305. The tail end of the terminal 302 is connected to an outer tube 307 that is sleeved around the cable. The outer tube 307 and the cable form a third flow channel that connects to the second flow channel 200. The liquid cooling pipe 7, connecting branch pipe 305, first flow channel 100, second flow channel 200, and third flow channel are sequentially connected to form a liquid cooling circuit. In this design, the liquid cooling terminal is a contact-type liquid cooling terminal that can contact the coolant to achieve better cooling effect and ensure the stability of the terminal 302 under operating conditions.

[0032] To secure the liquid-cooled terminal 3, two accommodating cavities 501 extending into the first inner cavity 201 are symmetrically arranged on the limiting seat 5. The liquid-cooled terminal 3 is inserted from the bottom of the accommodating cavity 501, and a retaining ring 301 is fixedly provided on the outer side of the liquid-cooled terminal 3. The diameter of the front end port of each accommodating cavity 501 is smaller than that of the retaining ring 301 so as to abut against the retaining ring 301 to limit the axial position of the liquid-cooled terminal 3. The side of the accommodating cavity 501 is provided with a slot 502 that matches the connecting branch pipe 305. The connecting branch pipe 305 is engaged in the slot 502 to prevent the liquid-cooled terminal 3 from rotating, save the volume of the accommodating cavity 501, and improve the compatibility between the accommodating cavity 501 and the liquid-cooled terminal 3.

[0033] Furthermore, the liquid cooling pipe 7 includes two branch ports 701, each of which is connected to a connecting branch pipe 305. This structure allows two liquid cooling terminals 3 to share a single liquid cooling pipe 7, further saving internal components, optimizing the internal structure, making the internal components more compact, and thus reducing the overall volume and weight.

[0034] Both the cable and the liquid cooling pipe 7 are threaded through a sleeve 8, which extends from the bottom of the handle housing 2. A cable retainer 9 is located at the bottom of the handle housing 2. The cable retainer 9 is composed of two symmetrical half-shells 901 joined together. A fixing member 902 is fixed to the outer wall of the sleeve 8. The inner cavity of each half-shell 901 matches the outer contour of the fixing member 902. The two half-shells 901 are symmetrically engaged on both sides of the fixing member 902 and screwed together to form the cable retainer 9, thus securing it integrally with the fixing member 902. The cable clamp 9, composed of the two half-shells 901, allows it to adapt to sleeves 8 of different diameters. The fixing member 902, in conjunction with the cable clamp 9, limits the position of the sleeve 8, thereby limiting the position of the cable and the liquid cooling pipe 7 while preventing compression of the liquid cooling pipe 7.

[0035] Furthermore, a set of protrusions 903 are provided on the inner wall of the semi-shell 901, and the protrusions 903 abut against the outer wall of the sleeve 8 to enhance the stability of the wire clamp 9 in holding the sleeve 8.

[0036] To ensure the airtightness of the handle housing 2, a sealing ring 10 is provided at the connection between the cable holder 9 and the bottom of the handle housing 2. The outer peripheral wall of the sealing ring 10 is provided with multiple layers of sealing rings to form a multi-level seal and enhance the sealing performance.

[0037] In this design, the top of the FPC flexible board 6 is bent, and a set of pin headers 601 are disposed at the bent portion of the FPC flexible board 6 to connect one by one with a set of signal terminals 4. By replacing the conventional internal PCB board with the more flexible FPC flexible board 6, and by bending the FPC flexible board 6 to connect the pin headers 601 to the signal terminals 4, the size of the FPC flexible board 6 and the required installation space are minimized as much as possible, saving internal space in the first inner cavity 201 and making the entire internal structure of the first inner cavity 201 more compact.

[0038] Furthermore, a mechanical lock 11 and a micro switch 12 are provided on the top of the handle housing 2. The mechanical lock 11 is pivotally connected to the handle housing 2, and the micro switch 12 is located at the bottom of the mechanical lock 11. A spring 13 is abutted between the bottom of the mechanical lock 11 and the top of the handle housing 2 so that the mechanical lock 11 can trigger the micro switch 12 by pressing, thereby ensuring that the charging gun maintains a stable and reliable charging state.

[0039] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0040] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A liquid-cooled charging gun, characterized in that: The housing includes a plug housing (1) and a handle housing (2) joined together. The handle housing (2) has an inner cavity including a straight-extending first inner cavity (201) and a downwardly extending second inner cavity (202). The first inner cavity (201) is connected to the plug housing (1). A limiting seat (5) is fixed on the inner end face of the plug housing (1). A pair of liquid-cooled terminals (3) are defined in the limiting seat (5). The liquid-cooled terminals (3) pass through the plug housing (1) and the first inner cavity (201), and their tail ends are... A cable and a liquid cooling pipe (7) are connected. The cable and the liquid cooling pipe (7) extend along the second inner cavity (202) and extend out from the bottom of the handle housing (2). A handle is provided at the tail end of the handle housing (2). A set of signal terminals (4) passing through the plug housing (1) is fixed on the front end face of the limiting seat (5). An FPC flexible board (6) is fixed on the rear end face of the limiting seat (5). A set of pin headers (601) is integrated on the FPC flexible board (6) to connect one by one with the set of signal terminals (4).

2. The liquid-cooled charging gun according to claim 1, characterized in that: The liquid-cooled terminal (3) includes a terminal (302), an inner tube (303), and a connecting sleeve (304). The terminal (302) is hollow inside and houses the inner tube (303). A first flow channel (100) for coolant to flow is formed between the inner wall of the terminal (302) and the outer wall of the inner tube (303). The hollow interior of the inner tube (303) forms a second flow channel (200) that communicates with the first flow channel (100). The connecting sleeve (304) is fitted onto the outside of the tail end of the terminal (302) and has a connection to the liquid-cooled pipe (7). A branch pipe (305) is connected to the terminal (302), and a through hole (306) is provided at the end of the terminal (302) to connect the first flow channel (100) and the branch pipe (305). An outer tube (307) is connected to the end of the terminal (302) and is sleeved on the outside of the cable. The outer tube (307) and the cable form a third flow channel that is connected to the second flow channel (200). The liquid cooling pipe (7), the branch pipe (305), the first flow channel (100), the second flow channel (200) and the third flow channel are connected in sequence to form a liquid cooling circuit.

3. The liquid-cooled charging gun according to claim 2, characterized in that: The limiting seat (5) is symmetrically provided with two receiving cavities (501) extending toward the first inner cavity (201). The liquid-cooled terminal (3) is inserted from the bottom of the receiving cavity (501), and a retaining ring (301) is fixed on the outside of the liquid-cooled terminal (3). The diameter of the front end port of each receiving cavity (501) is smaller than that of the retaining ring (301) to abut against the retaining ring (301) to limit the axial position of the liquid-cooled terminal (3). The side of the receiving cavity (501) is provided with a groove (502) that matches the connecting branch pipe (305). The connecting branch pipe (305) is locked in the groove (502).

4. The liquid-cooled charging gun according to claim 3, characterized in that: The liquid cooling pipe (7) includes two branch ports (701), and the two branch ports (701) are respectively connected to a connecting branch pipe (305).

5. The liquid-cooled charging gun according to claim 4, characterized in that: The cable and liquid cooling pipe (7) are both inserted into a sleeve (8). The sleeve (8) extends out from the bottom of the handle housing (2). A cable fastener (9) is provided at the bottom of the handle housing (2). The cable fastener (9) is composed of two symmetrical half-shells (901) spliced ​​together. A fixing member (902) is fixed on the outer wall of the sleeve (8). The inner cavity of the half-shell (901) matches the outer contour of the fixing member (902). The two half-shells (901) are respectively symmetrically clamped on both sides of the fixing member (902) and screwed together to form the cable fastener (9), which is then fixed to the fixing member (902) as a whole.

6. The liquid-cooled charging gun according to claim 5, characterized in that: A set of protrusions (903) are provided on the inner wall of the semi-shell (901), and the protrusions (903) abut against the outer wall of the sleeve (8).

7. The liquid-cooled charging gun according to claim 6, characterized in that: A sealing ring (10) is provided at the connection between the wire fastener (9) and the bottom of the handle housing (2).

8. The liquid-cooled charging gun according to any one of claims 1-7, characterized in that: The top of the FPC flexible board (6) is bent, and a set of pin headers (601) are disposed on the bent part of the FPC flexible board (6) to connect one by one with a set of signal terminals (4).

9. The liquid-cooled charging gun according to claim 8, characterized in that: The top of the handle housing (2) is provided with a mechanical lock (11) and a micro switch (12). The mechanical lock (11) is pivotally connected to the handle housing (2). The micro switch (12) is located at the bottom of the mechanical lock (11). A spring (13) abuts between the bottom of the mechanical lock (11) and the top of the handle housing (2) so that the mechanical lock (11) can trigger the micro switch (12) by pressing.

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