Liquid cooling terminal and charging gun

Abstract

The invention discloses a liquid cooling terminal and a charging gun, the liquid cooling terminal comprises a terminal and a liquid cooling assembly matched with the terminal, the liquid cooling assembly comprises a ceramic liquid cooling pipe and a connecting piece, the connecting piece is an integrated member composed of a main sleeve, a water inlet pipe and a water outlet pipe, the ceramic liquid cooling pipe is embedded in the main sleeve, and the water inlet pipe is connected with the water outlet pipe. The two ends of the outer wall of the ceramic liquid cooling pipe are connected with the inner wall of the main sleeve in a sealed mode, a liquid cooling flow channel surrounding the outer wall of the ceramic liquid cooling pipe is concavely arranged between the two ends of the outer wall of the ceramic liquid cooling pipe, and the liquid cooling flow channel is communicated with the water inlet pipe and the water outlet pipe to form a liquid cooling loop. The ceramic liquid cooling pipe is sleeved at the tail end of the terminal, and the inner wall of the ceramic liquid cooling pipe is tightly attached to the outer wall of the terminal. According to the scheme, the volume length of the liquid cooling terminal is shortened as much as possible while the terminal of a solid structure is effectively cooled, so that the volume and the weight of the charging gun are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of charging guns, and in particular to a liquid cooling terminal and a charging gun. Background Art

[0002] High-power conduction charging is one of the main ways to quickly replenish electric energy for electric vehicles. This requires the use of a charging gun connected to the car for charging. Due to the passage of high-voltage current, the charging gun will generate a lot of heat during the charging process, resulting in high temperatures. On the one hand, high temperatures will reduce charging efficiency, and on the other hand, they will damage the charging gun itself. Overheating may even cause a fire. In order to ensure safe charging, the charging gun must be cooled in time to avoid overheating.

[0003] In the prior art, liquid cooling is often used to cool the inside of the charging gun. As disclosed in publication number CN 117507889A, a cavity is set inside the terminal to circulate coolant for cooling. However, such a cooling method is only suitable for terminals with hollow structures, and some terminals with solid structures cannot use such a heat dissipation method. Terminals with solid structures can be electrically connected more stably, but at the same time, as charging guns are increasingly pursuing lightweight and portable structural characteristics, the space left for terminal cooling is greatly reduced. Therefore, how to reduce the cooling space as much as possible while ensuring a good cooling effect is an issue that urgently needs to be considered. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a liquid cooling terminal and a charging gun.

[0005] The purpose of the present invention is achieved through the following technical solutions: A liquid-cooling terminal comprises a terminal and a liquid-cooling component matched therewith, wherein the liquid-cooling component comprises a ceramic liquid-cooling tube and a connecting piece, wherein the connecting piece is an integrated component consisting of a main sleeve, a water inlet pipe, and a water outlet pipe, wherein the water inlet pipe and the water outlet pipe are respectively arranged on both sides of the main sleeve, wherein the ceramic liquid-cooling tube is embedded in the main sleeve, and the two ends of the outer wall of the ceramic liquid-cooling tube are respectively sealed and connected to the inner wall of the main sleeve, and a liquid-cooling flow channel is recessed between the two ends of the outer wall of the ceramic liquid-cooling tube and wound around the outer wall thereof, and the liquid-cooling flow channel is respectively connected to the water inlet pipe and the water outlet pipe to form a liquid-cooling circuit, wherein the ceramic liquid-cooling tube is sleeved on the tail end of the terminal, and the inner wall of the ceramic liquid-cooling tube is tightly fitted to the outer wall of the terminal.

[0006] Preferably, the liquid cooling channel is formed by a group of straight segments and arc segments connected in sequence, the straight segments extend along the axial direction of the ceramic liquid cooling tube, the ends of every two straight segments are connected by an arc segment, and the water inlet pipe and the water outlet pipe are symmetrically arranged on both sides of the main casing and are respectively connected to the liquid cooling channel.

[0007] Preferably, the liquid cooling channel is spirally arranged along the circumference of the outer wall of the ceramic liquid cooling tube, the water inlet pipe is connected to the starting point of the liquid cooling channel, and the water outlet pipe is connected to the end point of the liquid cooling channel.

[0008] Preferably, at least one annular groove is respectively provided at both ends of the outer wall of the ceramic liquid cooling tube, and a sealing ring is embedded in the annular groove to seal the gap between the outer wall of the ceramic liquid cooling tube and the inner wall of the main sleeve.

[0009] Preferably, a retaining ring is clamped on the terminal, and a limiting step surface matching the tail end of the ceramic liquid cooling tube is provided in the main sleeve, and both ends of the ceramic liquid cooling tube are respectively abutted against the retaining ring and the limiting step surface.

[0010] Preferably, a limiting slot is symmetrically arranged in the limiting step surface, and a clamping block matching the limiting slot is arranged at the tail end of the ceramic liquid cooling tube, and the clamping block is clamped in the limiting slot.

[0011] Preferably, a temperature sensor is provided in the tail end of the terminal to detect the temperature of the terminal in real time.

[0012] Preferably, the front ends of the water inlet pipe and the water outlet pipe are extended obliquely relative to the main sleeve to be connected with the main sleeve, and the tail ends of the water inlet pipe and the water outlet pipe are extended straight.

[0013] The charging gun comprises a shell, in which at least two liquid-cooling terminals as described above are symmetrically arranged.

[0014] The beneficial effects of the present invention are mainly reflected in: 1. A ceramic liquid cooling tube that fits the solid structure terminal is sleeved on the tail end, and the ceramic itself has good thermal conductivity to directly contact the terminal for heat conduction, and a liquid cooling channel for circulating coolant is directly recessed on the outer wall of the ceramic liquid cooling tube to reduce the temperature of the terminal by reducing the temperature of the ceramic cooling tube, so as to further enhance the heat dissipation effect of the ceramic liquid cooling tube on the terminal, dissipate heat from the terminal in time, and ensure the safe use of the terminal; 2. A liquid cooling channel is recessed on the outer wall of the ceramic liquid cooling tube and arranged around its outer peripheral wall, so that the liquid cooling channel can cover the entire outer wall of the ceramic liquid cooling tube as much as possible through bending, so as to maximize the cooling effect of the liquid cooling ceramic tube and achieve the purpose of cooling; at the same time, such a structural setting can shorten the axial length of the ceramic liquid cooling tube as much as possible under the same cooling effect, so as to simplify the axial length and volume of the entire liquid cooling assembly, and help to reduce the volume of the entire charging gun, making the charging gun lighter and easier to hold; 3. The inclined extension of the connection ends of the water inlet pipe and the water outlet pipe to the main body can facilitate the coolant to flow into the liquid cooling flow channel recessed in the ceramic liquid cooling tube, and help to reduce the radial dimension of the entire liquid cooling assembly, thereby streamlining and optimizing the internal structure of the charging gun and reducing the volume of the charging gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The technical solution of the present invention is further described below in conjunction with the accompanying drawings: Figure 1 : Explosion diagram of the liquid cooling terminal; Figure 2 : Cross-sectional view of the liquid cooling terminal; Figure 3 : A schematic diagram of a first embodiment of a ceramic liquid cooling tube; Figure 4 : A schematic diagram of a second embodiment of a ceramic liquid cooling tube; Figure 5 : Schematic diagram of the charging gun. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0017] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0018] like Figures 1 to 4As shown, the present invention discloses a liquid-cooling terminal, comprising a terminal 1 and a liquid-cooling component matched therewith, the liquid-cooling component comprising a ceramic liquid-cooling tube 2 and a connector 3, the connector 3 being an integrated component consisting of a main sleeve 301, a water inlet pipe 302, and a water outlet pipe 303, the water inlet pipe 302 and the water outlet pipe 303 being arranged on both sides of the main sleeve 301, the ceramic liquid-cooling tube 2 being embedded in the main sleeve 301, and the two ends of the outer wall of the ceramic liquid-cooling tube 2 are respectively sealed and connected to the inner wall of the main sleeve 301, a liquid-cooling channel 200 is recessed between the two ends of the outer wall of the ceramic liquid-cooling tube 2 and the outer wall of the ceramic liquid-cooling tube is wound around the liquid-cooling channel 200, and the liquid-cooling channel 200 is respectively connected to the water inlet pipe 302 and the water outlet pipe 303 to form a liquid-cooling circuit, the ceramic liquid-cooling tube 2 is sleeved on the tail end of the terminal 1, and the inner wall of the ceramic liquid-cooling tube 2 is tightly fitted to the outer wall of the terminal 1.

[0019] The terminal 1 in this solution is preferably a solid structure, and the ceramic liquid cooling tube 2 is preferably made of alumina ceramics to have good heat dissipation effect and insulation. The tail end of the solid structure terminal 1 is sleeved with a ceramic liquid cooling tube 2 that fits it, and the good thermal conductivity of the ceramic itself is used to directly contact the terminal 1 for heat conduction, and a liquid cooling channel 200 for circulating coolant is directly recessed on the outer wall of the ceramic liquid cooling tube 2 to achieve the effect of lowering the temperature of the terminal 1 by lowering the temperature of the ceramic cooling tube 2, so as to further enhance the heat dissipation effect of the ceramic liquid cooling tube 2 on the terminal 1, dissipate heat from the terminal 1 in time, and ensure the safe use of the terminal 1.

[0020] The liquid cooling channel 200 is recessed on the outer wall of the ceramic liquid cooling tube 2 and wrapped around its outer circumferential wall, so that the liquid cooling channel 200 can cover the entire outer wall of the ceramic liquid cooling tube 2 as much as possible through bending, so as to maximize the cooling effect on the liquid-cooled ceramic tube 2 and achieve the purpose of cooling; at the same time, such a structural setting can shorten the axial length of the ceramic liquid cooling tube 2 as much as possible under the same cooling effect, to simplify the axial length and volume of the entire liquid cooling assembly, to help reduce the volume of the entire charging gun, and make the charging gun lighter and easier to hold.

[0021] Specifically, the liquid cooling channel 200 has two feasible embodiments, such as Figure 1-Figure 3 As shown, in the first embodiment, the liquid cooling channel 200 is formed by a group of straight segments 201 and arc segments 202 connected in sequence, the straight segment 201 extends along the axial direction of the ceramic liquid cooling tube 2, and the ends of every two straight segments 201 are connected by an arc segment 202, so that the liquid cooling channel 200 covers the entire outer wall of the ceramic liquid cooling tube 2 as much as possible, and such a structure facilitates the rapid passage of the coolant. The width of the straight segment 201 is preferably consistent with the width of the arc segment 202.

[0022] In the first embodiment of the liquid cooling channel 200, the water inlet pipe 302 and the water outlet pipe 303 can be symmetrically arranged on both sides of the main sleeve 301, and the two are respectively connected to the liquid cooling channel 200 to form a liquid cooling circuit. Such a structure allows the water inlet pipe 302 and the water outlet pipe 303 to be installed without error prevention, which greatly facilitates the manufacture and installation of the connector 3.

[0023] like Figure 4 As shown, it is a second embodiment of the liquid cooling channel 200. In the second embodiment, the liquid cooling channel 200 is spirally wound along the outer wall of the ceramic liquid cooling tube 2, the water inlet pipe 302 is connected to the starting point of the liquid cooling channel 200, and the water outlet pipe 303 is connected to the end point of the liquid cooling channel 200. Such a structure can facilitate the flow of the coolant more smoothly, so that it can flow quickly for cooling. In the second embodiment, the positions of the water inlet pipe 302 and the water outlet pipe 303 correspond to the starting point and the end point of the liquid cooling channel 200, respectively, to connect and form a liquid cooling circuit.

[0024] In the two embodiments of the present invention, the water inlet pipe 302 and the water outlet pipe 303 are arranged on both sides of the main sleeve 301. In addition to the above-mentioned effects, the cooling effect can also be balanced as much as possible. Because corresponding to the structure of water inlet at the end and water outlet on one side of the prior art, since it has no flow channel restriction, the uncertainty of water flow pressure and flow rate will lead to uneven cooling of the terminal surface, and the present invention is provided with a liquid cooling channel 200 with a limited path on the outer wall of the ceramic liquid cooling tube 2, which can solve the above problem. At the same time, the water inlet pipe 302 and the water outlet pipe 303 are arranged on both sides of the main sleeve 301, which can make the forces on both sides of the terminal 1 more balanced, and improve its position stability and force balance after being configured in the charging gun, thereby improving the user's holding experience when using the charging gun.

[0025] Furthermore, at least one annular groove 203 is respectively provided at both ends of the outer wall of the ceramic liquid cooling tube 2, and a sealing ring 204 is embedded in the annular groove 203 to seal the gap between the outer wall of the ceramic liquid cooling tube 2 and the inner wall of the main sleeve 301. Preferably, two annular grooves 203 are respectively recessed at both ends of the ceramic liquid cooling tube 2 to respectively embed the sealing ring 204, so as to form a multi-stage sealing effect, prevent coolant leakage, and ensure the sealing of the liquid cooling channel 200 and the safety of use inside the charging gun.

[0026] A retaining ring 101 is clamped on the terminal 1, and a limiting step surface 304 matching the tail end of the ceramic liquid cooling tube 2 is provided in the main sleeve 301. The two ends of the ceramic liquid cooling tube 2 are respectively abutted against the retaining ring 101 and the limiting step surface 304, so that the main sleeve 301 and the retaining ring 101 cooperate to limit the position of the ceramic liquid cooling tube 2, so that the ceramic liquid cooling tube 2 and the terminal 1 are stably fixed together to prevent the two from detaching.

[0027] Furthermore, a limiting slot 305 is symmetrically arranged in the limiting step surface 304, and a block 205 matching the limiting slot 305 is arranged at the tail end of the ceramic liquid cooling tube 2. The block 205 is clamped in the limiting slot 305 to prevent the ceramic liquid cooling tube 2 from rotating in the main sleeve 301.

[0028] In order to ensure safety, a temperature sensor is provided in the tail end of the terminal 1 to detect the temperature of the terminal 1 in real time. A mounting hole is provided at the tail end of the terminal 1 to fix the temperature sensor.

[0029] Preferably, the front ends of the water inlet pipe 302 and the water outlet pipe 303 are extended obliquely relative to the main sleeve 301 to communicate with the main sleeve 301, and the tail ends of the water inlet pipe 302 and the water outlet pipe 303 extend straight. The oblique extension of the front ends of the water inlet pipe 302 and the water outlet pipe 303 can facilitate the coolant to flow into the liquid cooling channel 200, and help to reduce the volume of the entire liquid cooling component, thereby streamlining and optimizing the internal structure of the charging gun and reducing the volume of the charging gun.

[0030] In addition, if Figure 5 As shown, the present solution also discloses a charging gun, including a housing 4, in which at least two liquid-cooling terminals as described above are symmetrically arranged. A mounting seat 401 adapted to the two liquid-cooling terminals is also arranged in the housing 4, and the two liquid-cooling terminals are embedded in the mounting seat 401. The front end of the terminal 1 extends from the mounting seat 401, and the rear end of the terminal 1 is connected to a cable. The retaining ring 101 abuts against the mounting seat 401, and the water inlet pipe 302 and the water outlet pipe 303 are respectively connected to the liquid inlet pipe 306 to circulate the cooling liquid.

[0031] The mounting seat 401 is fixedly connected to the housing 4 by screws, and a circuit board or FPC soft board is embedded therein to be plugged with the signal terminals. The liquid inlet pipe 306 and the cable are inserted into the main sleeve 402 together, and the main sleeve 402 passes through the tail end of the housing 4. The tail end of the housing 4 is provided with a clamp for limiting the main sleeve 402, and the clamp includes a fixed block 501 fixedly connected to the main sleeve 402 and an outer limit sleeve 502 fixedly connected to the fixed block 501. The outer limit sleeve 502 is composed of two symmetrical annular structures, and the two halves of the annular structure are sleeved on the outer wall of the fixed block 501, and the two ends of the two halves of the annular structure are fixedly connected by bolts to clamp the fixed block 501 to achieve the fixed connection between the housing 4 and the main sleeve 402, while avoiding squeezing the main sleeve 402. The inner wall of the outer limit sleeve 502 is densely covered with convex points to increase the contact area between it and the main sleeve 402, so as to prevent the main sleeve 402 from shaking and causing wear and breakage. The housing 4 also includes other conventional structures in the charging gun, which is the prior art and will not be described here one by one.

[0032] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0033] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. Liquid-cooled terminal, characterized in that: The invention comprises a terminal (1) and a liquid cooling component matched therewith, wherein the liquid cooling component comprises a ceramic liquid cooling tube (2) and a connecting piece (3), wherein the connecting piece (3) is an integrated component composed of a main sleeve (301), a water inlet pipe (302), and a water outlet pipe (303), wherein the water inlet pipe (302) and the water outlet pipe (303) are arranged on both sides of the main sleeve (301), and the ceramic liquid cooling tube (2) is embedded in the main sleeve (301), and the ceramic liquid cooling tube (2) is The two ends of the outer wall are respectively sealedly connected to the inner wall of the main sleeve (301); a liquid cooling channel (200) is recessed between the two ends of the outer wall of the ceramic liquid cooling tube (2) and wound around the outer wall; and the liquid cooling channel (200) is respectively connected to the water inlet pipe (302) and the water outlet pipe (303) to form a liquid cooling circuit; the ceramic liquid cooling tube (2) is sleeved on the tail end of the terminal (1), and the inner wall of the ceramic liquid cooling tube (2) is tightly fitted with the outer wall of the terminal (1).

2. The liquid-cooled terminal according to claim 1, characterized in that: The liquid cooling channel (200) is formed by a group of straight segments (201) and arc segments (202) connected in sequence, the straight segments (201) extending along the axial direction of the ceramic liquid cooling tube (2), the ends of every two straight segments (201) being connected by an arc segment (202), the water inlet pipe (302) and the water outlet pipe (303) being symmetrically arranged on both sides of the main sleeve (301), and respectively connected to the liquid cooling channel (200).

3. The liquid-cooled terminal according to claim 1, characterized in that: The liquid cooling channel (200) is spirally arranged along the circumference of the outer wall of the ceramic liquid cooling tube (2); the water inlet pipe (302) is connected to the starting point of the liquid cooling channel (200); and the water outlet pipe (303) is connected to the end point of the liquid cooling channel (200).

4. The liquid-cooled terminal according to claim 2 or 3, characterized in that: At least one annular groove (203) is provided at each end of the outer wall of the ceramic liquid cooling tube (2), and a sealing ring (204) is embedded in the annular groove (203) to seal the gap between the outer wall of the ceramic liquid cooling tube (2) and the inner wall of the main sleeve (301).

5. The liquid-cooled terminal according to claim 4, characterized in that: A retaining ring (101) is clamped on the terminal (1), a limiting step surface (304) matching the tail end of the ceramic liquid cooling tube (2) is provided in the main sleeve (301), and both ends of the ceramic liquid cooling tube (2) are respectively in contact with the retaining ring (101) and the limiting step surface (304).

6. The liquid-cooled terminal according to claim 5, characterized in that: A limiting slot (305) is symmetrically arranged in the limiting step surface (304), and a clamping block (205) matching the limiting slot (305) is arranged at the tail end of the ceramic liquid cooling tube (2), and the clamping block (205) is clamped in the limiting slot (305).

7. The liquid-cooled terminal according to claim 6, characterized in that: A temperature sensor is arranged in the tail end of the terminal (1) to detect the temperature of the terminal (1) in real time.

8. The liquid-cooled terminal according to claim 2 or 3, characterized in that: The front ends of the water inlet pipe (302) and the water outlet pipe (303) extend obliquely relative to the main sleeve (301) to communicate with the main sleeve (301), and the rear ends of the water inlet pipe (302) and the water outlet pipe (303) extend straight.

9. Charging gun, characterized by: It comprises a shell (4), in which at least two liquid-cooling terminals according to any one of claims 1 to 8 are symmetrically arranged.

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