Charging gun and charging system

Abstract

The present application discloses a charging gun and a charging system, including a shell, a conductive structure, a terminal structure, a cable and a liquid cooling pipe, wherein the cable is used to be electrically connected to the charging pile, wherein the conductive structure is inserted in the shell, and along the axial direction of the shell, the conductive structure divides the inner cavity of the shell into two opposite first accommodating chambers and second accommodating chambers, and the first accommodating chamber is connected to the liquid cooling pipe. The conductive structure can move along the axial direction of the shell, and the terminal structure is electrically connected to the conductive structure. Along the axial direction of the shell, one end of the conductive structure away from the terminal structure is arranged opposite to the cable, and when the conductive structure contacts the cable, the conductive structure is electrically connected to the cable, and when the end of the conductive structure away from the terminal structure is separated from the cable, the conductive structure is electrically disconnected from the cable. Using the charging gun provided by the present application, the conductive structure moves in the inner cavity of the shell to realize the power on and off of the conductive structure and the cable and the pressure relief of the liquid cooling pipe, thereby improving the safety of the charging gun.

Description

Technical Field

[0001] The present application relates to the technical field of charging equipment, and in particular to a charging gun and a charging system. Background Art

[0002] With the development of science and technology, the charging power of charging piles is getting higher and higher, and correspondingly, the heat generated by the cables of charging guns is also getting higher and higher. In order to improve the operating stability of charging equipment, effective heat dissipation methods have become particularly important. Among them, liquid cooling is widely used in charging equipment as an efficient heat dissipation method. Specifically, the liquid cooling pipe of the charging gun is connected to the liquid cooling box of the charging pile to achieve heat dissipation of the cable of the charging gun through the circulation of the coolant between the liquid cooling pipe and the liquid cooling box. However, when the liquid cooling pipe storing the coolant is deformed, the internal pressure of the liquid cooling pipe suddenly increases, which may destroy the integrity of the liquid cooling pipe and may also cause the coolant to leak. Especially during the charging process of the charging gun, if the liquid cooling pipe is deformed, the entire liquid cooling system may not work properly. At this time, if the charging gun is still in a charging state, it may cause a safety accident.

[0003] Therefore, how to improve the safety of the charging gun when the liquid cooling pipe is deformed has become a difficult problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0004] The present application provides a charging gun to improve the safety of the charging gun.

[0005] In the first aspect, the present application provides a charging gun, including a shell, a conductive structure, a terminal structure, a cable and a liquid cooling pipe, wherein the cable is electrically connected to the charging pile, wherein the conductive structure is inserted into the shell, and along the axial direction of the shell, the conductive structure divides the inner cavity of the shell into two opposite first accommodating chambers and second accommodating chambers, and the first accommodating chamber is connected to the liquid cooling pipe; and the conductive structure can move along the axial direction of the shell. The terminal structure is connected to the shell, and the terminal structure includes a first blind hole, the opening end of the first blind hole faces the second accommodating chamber, at least part of the conductive structure is inserted into the first blind hole, and the terminal structure is electrically connected to the conductive structure. Along the axial direction of the shell, the end of the conductive structure away from the terminal structure is arranged opposite to the cable, and when the conductive structure contacts the cable, the conductive structure is electrically connected to the cable. When the end of the conductive structure away from the terminal structure is separated from the cable, the conductive structure is electrically disconnected from the cable.

[0006] When using the charging gun provided by the present application, when the liquid cooling pipe storing coolant is deformed, a part of the liquid in the liquid cooling pipe will flow rapidly to the first accommodating chamber, which will cause the liquid pressure in the first accommodating chamber to increase instantaneously, so as to push the conductive structure to move toward the second accommodating chamber. In this way, the end of the conductive structure that is away from the terminal structure can be separated from the cable, so that the conductive structure is electrically disconnected from the cable, thereby disconnecting the electrical connection between the charging gun and the charging pile, so as to avoid the cable continuing to supply power and abnormal heating when an abnormality occurs in the liquid cooling pipe, thereby improving the safety of the charging gun.

[0007] In addition, by adopting the design of the charging gun provided in the present application, when an abnormality occurs in the liquid cooling pipe, the volume of the first accommodating chamber increases, so it can also relieve the pressure inside the liquid cooling pipe, thereby reducing the risk of damage to the liquid cooling pipe and leakage of the coolant.

[0008] In a possible implementation of the present application, the charging gun further includes an elastic structural member, one end of which abuts against the bottom of the first blind hole, and the other end of which abuts against the conductive structure. In this way, when the deformed liquid cooling pipe returns to normal, the conductive structure can move toward the cable under the elastic force of the elastic structural member to achieve automatic resetting of the conductive structure and electrical connection between the conductive structure and the cable.

[0009] In a possible implementation of the present application, a first connecting column is disposed in the first blind hole, and the first connecting column is located at the bottom of the first blind hole; the conductive structure includes a second connecting column, and the second connecting column is disposed opposite to the first connecting column. One end of the elastic structural member is sleeved on the first connecting column, and the other end of the elastic structural member is sleeved on the second connecting column. In this way, by sleeved one end of the elastic structural member on the first connecting column, and sleeved the other end of the elastic structural member on the second connecting column, the connection reliability between the elastic structural member and the first blind hole and the conductive structure can be improved.

[0010] In a possible implementation of the present application, the terminal structure also includes a limiting rib, and the limiting rib is located on the inner wall of the first blind hole. The conductive structure includes a clamping portion, and the clamping portion is used to clamp with the limiting rib. When the liquid cooling pipe is severely deformed and cannot work normally afterwards, the conductive structure will move a large displacement in the first blind hole in a direction away from the cable until the clamping portion of the conductive structure is clamped with the limiting rib in the first blind hole. In this way, even if the external force that causes the deformation of the liquid cooling pipe disappears, the conductive structure cannot be reset and electrically connected to the cable, thereby effectively avoiding abnormal heating of the cable.

[0011] In a possible implementation of the present application, at least a portion of the side wall of the conductive structure abuts against the side wall of the first blind hole, which can improve the convenience of installing the charging gun while meeting the electrical connection requirements between the terminal structure and the conductive structure.

[0012] In a possible implementation of the present application, the conductive structure includes a body and a boss, and at least a portion of the body is plugged into the first blind hole. The boss is arranged on the side wall of the body around the axis of the body, and the boss abuts against the inner side wall of the shell. In this way, the inner cavity of the shell can be directly divided into a first accommodating cavity and a second accommodating cavity by the boss, thereby reducing the material cost of the conductive structure and increasing the volume of the first accommodating cavity.

[0013] In a possible implementation of the present application, the charging gun also includes a crimping piece, which is located between the conductive structure and the cable. The crimping piece includes a second blind hole, the cable is inserted into the second blind hole, and the cable abuts against the side wall of the second blind hole. When the conductive structure contacts the crimping piece, the conductive structure is electrically connected to the cable through the crimping piece. The charging gun provided by the present application can effectively improve the contact reliability between the crimping piece and the cable by abutting the side wall of the second blind hole with the cable, thereby further improving the contact reliability and electrical connection stability between the conductive structure and the cable when the conductive structure contacts the crimping piece.

[0014] In a possible implementation of the present application, the charging gun further includes a locking end cap, the terminal structure is plugged into the second accommodating cavity; the locking end cap is sleeved on the terminal structure, and the locking end cap is detachably connected to the shell; the terminal structure is fixedly connected to the shell through the locking end cap. In this way, the terminal structure can be detachably connected to the shell, thereby improving the convenience of replacing or repairing the terminal structure.

[0015] In a possible implementation of the present application, the charging gun further includes a sealing ring, which is sleeved on the terminal structure and abuts against the outer wall of the terminal structure and the inner wall of the shell, so as to reduce the possibility of the coolant overflowing the second accommodating chamber when the coolant is squeezed into the second accommodating chamber.

[0016] On the second aspect, the present application also provides a charging system, which includes a charging pile, a liquid storage tank and a charging gun as described in the first aspect, the liquid storage tank is filled with coolant, and the second accommodating chamber is connected to the liquid storage tank through a liquid cooling pipe. The cable is electrically connected to the charging pile. In the charging system provided by the present application, the charging gun can use the deformation of the liquid cooling pipe to cause the liquid pressure in the first accommodating chamber to increase instantaneously to disconnect the electrical connection with the charging pile. At the same time, when the liquid cooling pipe returns to normal, the charging gun can also achieve electrical connection with the charging pile. Therefore, it is beneficial to improve the safety of the charging system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of the charging gun provided in this application;

[0018] Figure 2 A cross-sectional view of a charging gun provided for this application;

[0019] Figure 3 Another cross-sectional view of the charging gun provided for this application;

[0020] Figure 4 A schematic diagram of the structure of the clamping part and the limiting rib of the charging gun provided in this application;

[0021] Figure 5 A schematic diagram of a conductive structure provided in this application;

[0022] Figure 6 A schematic diagram of the structure of the charging system provided in this application when it is in a normal state;

[0023] Figure 7 A structural schematic diagram of a charging system provided in the present application when it is in an abnormal state.

[0024] Figure markings: 1-housing; 11-first accommodating cavity; 12-second accommodating cavity; 2-conductive structure; 21-clamping part; 22-body; 23-boss; 24-groove; 3-terminal structure; 31-first blind hole; 32-limiting rib; 4-cable; 5-liquid cooling pipe; 51-liquid inlet pipe; 52-liquid return pipe; 6-elastic structural part; 7-crimping part; 8-locking end cover; 9-sealing ring; 01-charging pile. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all illustrated by taking the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings of the embodiments of the present application are only used to illustrate the relative position relationship, and they do not represent the true proportion.

[0026] It should be noted that specific details are described in the following description to facilitate understanding of the present application. However, the present application can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific implementation methods disclosed below.

[0027] With the development of science and technology, the charging power of charging piles is getting higher and higher, and correspondingly, the heat generated by charging guns and cables is also getting higher and higher. In order to improve the operating stability of charging equipment, effective heat dissipation methods have become particularly important. Among them, liquid cooling heat dissipation, as an efficient heat dissipation method, is widely used in charging equipment. Specifically, the liquid cooling pipe of the charging gun is connected to the liquid cooling box of the charging pile to achieve heat dissipation of the cable of the charging gun through the circulation of the coolant between the liquid cooling pipe and the liquid cooling box. However, when the liquid cooling pipe storing the coolant is deformed, the internal pressure of the liquid cooling pipe suddenly increases, which may destroy the integrity of the liquid cooling pipe and may also cause the coolant to leak. Especially during the charging process of the charging gun, if the liquid cooling pipe is deformed, the entire liquid cooling system may not work properly. At this time, if the charging gun is still in a charging state, it may cause a safety accident.

[0028] In view of this, the charging gun provided by the present application disconnects the electrical connection between the charging gun and the charging pile by utilizing the deformation of the liquid cooling pipe to cause the liquid pressure in the pipe to increase instantaneously, thus, it is beneficial to improve the safety of the charging system. In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] refer to Figure 1 , Figure 1 A schematic diagram of the structure of the charging gun provided in this application. The charging gun includes a housing 1, a conductive structure 2, a terminal structure 3, a cable 4 and a liquid cooling pipe 5. The cable 4 is electrically connected to the charging pile. For details, please refer to Figure 2 , Figure 2 A cross-sectional view of the charging gun provided in the present application is used to show the state when the conductive structure 2 is in contact with the cable 4. The conductive structure 2 is inserted into the housing 1, and along the axial direction of the housing 1, the conductive structure 2 divides the inner cavity of the housing 1 into two opposite first accommodating chambers 11 and second accommodating chambers 12, and the first accommodating chamber 11 is connected to the liquid cooling pipe 5. Specifically, the liquid cooling pipe 5 includes a liquid inlet pipe 51 and a liquid return pipe 52, and the cable 4 is inserted into the liquid return pipe 52. In addition, the arrow direction in the liquid cooling pipe 5 is the flow direction of the coolant in the pipe.

[0030] In the actual application of the liquid cooling pipe 5 to dissipate heat for the cable 4, the coolant flows into the first accommodating chamber 11 through the liquid inlet pipe 51 and then flows back to the coolant storage device through the liquid return pipe 52. In this way, the coolant can be continuously circulated in the liquid cooling pipe 5 and the coolant storage device, thereby achieving heat dissipation for the cable 4.

[0031] Continue to refer Figure 2, the terminal structure 3 is connected to the housing 1, and the terminal structure 3 includes a first blind hole 31, the opening end of the first blind hole 31 faces the second accommodating cavity 12, and at least a portion of the conductive structure 2 is inserted into the first blind hole 31, and the terminal structure 3 is electrically connected to the conductive structure 2. And during the operation of the charging gun, the side of the terminal structure 3 away from the conductive structure 2 is electrically connected to the electrical device. Exemplarily, in order to achieve the electrical connection between the conductive structure 2 and the terminal structure 3, at least a portion of the side wall of the conductive structure 2 can be abutted against the side wall of the first blind hole 31, so that the convenience of installation of the charging gun can be improved while meeting the electrical connection requirements between the terminal structure 3 and the conductive structure 2.

[0032] It is worth mentioning that along the axial direction of the shell 1, the end of the conductive structure 2 facing away from the terminal structure 3 is arranged opposite to the cable 4, and when the conductive structure 2 is in contact with the cable 4, the conductive structure 2 and the cable 4 can be electrically connected, thereby realizing the electrical connection between the charging gun and the charging pile.

[0033] When the liquid cooling pipe 5 storing the coolant is deformed by using the charging gun provided by the present application, Figure 3 , Figure 3 Another cross-sectional view of the charging gun provided in the present application is used to show the state when the conductive structure 2 is separated from the cable 4. A portion of the liquid in the liquid cooling pipe 5 will quickly flow to the first accommodating chamber 11 along the liquid inlet pipe 51 and the liquid return pipe 52, which will cause the liquid pressure in the first accommodating chamber 11 to increase instantaneously, and the conductive structure 2 will move toward the second accommodating chamber 12, so that the conductive structure 2 of the charging gun is in a state of being separated from the cable 4. Figure 3 This can achieve the electrical disconnection between the conductive structure 2 and the cable 4, thereby disconnecting the electrical connection between the charging gun and the charging pile, so as to avoid the cable 4 continuing to supply power and abnormal heating when an abnormality occurs in the liquid cooling pipe 5, thereby improving the safety of the charging gun.

[0034] In addition, for the charging gun provided in the present application, when an abnormality occurs in the liquid cooling pipe 5, the conductive structure 2 moves along the axial direction of the shell 1 toward the terminal structure 3, so that the volume of the first accommodating chamber 11 increases, which can also have the effect of relieving the pressure on the liquid cooling pipe 5, thereby reducing the risk of damage to the liquid cooling pipe 5 and leakage of the coolant.

[0035] In a specific embodiment, Figure 2As shown, the charging gun also includes an elastic structural member 6, one end of the elastic structural member 6 abuts against the bottom of the first blind hole 31, the other end of the elastic structural member 6 abuts against the conductive structure 2, and the elastic structural member 6 is in a compressed state. Using the charging gun provided by the present application, along the axial direction of the housing 1, the force applied by the elastic structural member 6 to the conductive structure 2 is a first pressure, and the force applied by the coolant in the first accommodating chamber 11 toward the conductive structure 2 is a second pressure. When the liquid cooling pipe 5 is normal, that is, when the pressure value of the second pressure is less than or equal to the pressure value of the first pressure, the conductive structure 2 is in contact with the cable 4. When the liquid cooling pipe 5 is deformed, that is, when the pressure value of the second pressure is greater than the pressure value of the first pressure, the conductive structure 2 is separated from the cable 4, and the elastic structural member 6 is squeezed and deformed, and the pressure value of the first pressure applied by the elastic structural member 6 to the conductive structure 2 increases. It can be understood that when the deformed liquid cooling pipe 5 returns to normal, the pressure value of the second pressure is less than or equal to the pressure value of the first pressure. Then, under the elastic force of the elastic structural member 6, the conductive structure 2 can move toward the cable 4 to achieve automatic resetting of the conductive structure 2 and realize electrical connection between the conductive structure 2 and the cable 4.

[0036] It is worth mentioning that a first connecting column is disposed in the first blind hole 31, and the first connecting column is located at the bottom of the first blind hole 31. The conductive structure 2 includes a second connecting column, and the second connecting column is disposed opposite to the first connecting column. In this way, one end of the elastic structural member 6 can be sleeved on the first connecting column, and the other end of the elastic structural member 6 can be sleeved on the second connecting column to improve the connection reliability between the elastic structural member 6 and the first blind hole 31 and the conductive structure 2. Exemplarily, the elastic structural member 6 can be a spring, so that the cost can be reduced while satisfying the use function of the elastic structural member 6.

[0037] refer to Figure 4 , Figure 4 A structural schematic diagram of the clamping portion and the limiting rib of the charging gun provided in the present application. The terminal structure 3 also includes a limiting rib 32, which is located on the inner wall of the first blind hole 31. The conductive structure 2 includes a clamping portion 21, which is used to clamp with the limiting rib 32. Specifically, the limiting rib 32 is located on the inner wall of the first blind hole 31 and protrudes from the inner wall, and the limiting rib 32 and the body of the terminal structure 3 are an integral structure, which can improve the overall strength of the terminal structure 3. In addition, the clamping portion 21 is arranged on the outer side wall of the head of the body 22 of the conductive structure 2, and a groove is arranged on the outer side wall of the body 22 of the conductive structure 2, and the clamping portion 21 is embedded in the groove, and the clamping portion 21 can extend or retract along the notch of the groove, which can improve the smoothness of the clamping of the clamping portion 21 and the limiting rib 32.

[0038] In addition, with the charging gun provided by the present application, due to the different deformation degrees of the liquid cooling pipe 5, the magnitude of the second pressure applied by the coolant in the first accommodating chamber 11 to the conductive structure 2 will also be different, and the displacement of the conductive structure 2 in the first blind hole 31 in the direction away from the cable 4 will also be different. Therefore, when the liquid cooling pipe 5 is severely deformed and cannot work normally afterwards, since the pressure value of the second pressure at this time is much greater than the pressure value of the first pressure, the conductive structure 2 will move a large displacement in the first blind hole 31 in the direction away from the cable 4 until the clamping portion 21 of the conductive structure 2 is clamped with the limiting rib 32 in the first blind hole 31. In this way, even if the external force that causes the deformation of the liquid cooling pipe 5 disappears, so that the pressure value of the second pressure is less than the pressure value of the first pressure, the conductive structure 2 cannot be reset and electrically connected with the cable 4. Therefore, through the above-mentioned structural design, the present application can effectively avoid abnormal heating of the cable 4 by clamping the clamping portion 21 with the limiting rib 32 when the liquid cooling pipe 5 is severely deformed and cannot work normally afterwards.

[0039] In a specific embodiment, Figure 2 As shown, the conductive structure 2 includes a body 22 and a boss 23, and at least a portion of the body 22 is inserted into the first blind hole 31. Figure 2 and Figure 4 , the boss 23 is arranged on the side wall of the body 22 around the axis of the body 22, and the boss 23 abuts against the inner wall of the shell 1, so that the inner cavity of the shell 1 can be directly divided into the first accommodating cavity 11 and the second accommodating cavity 12 by the boss 23, thereby reducing the material cost of the conductive structure 2, and also increasing the volume of the first accommodating cavity 11. It can be understood that the contact position between the boss 23 and the inner wall of the shell 1 is sealed, and it can be sealed by setting a sealing silicone. And along the axial direction of the shell, during the movement of the conductive structure 2, the contact position between the boss 23 and the inner wall of the shell 1 is always in a sealed state.

[0040] In addition, the present application does not limit the specific shapes of the body 22 and the boss 23. For example, the body 22 may be cylindrical and coaxially arranged with the first blind hole 31. In addition, the boss 23 may be a thin ring sleeved on the outer wall of the body 22 and coaxially arranged with the body 22, and the thickness of the thin ring along the axis direction of the body 22 may be adjusted according to actual needs.

[0041] For reference Figure 4 and reference Figure 5 , Figure 5A structural schematic diagram of the conductive structure provided in the present application. Along the axial direction of the shell, a plurality of grooves 24 are arranged side by side on one side of the boss 23 close to the first accommodating chamber 11, and the notches of the plurality of grooves 24 are all facing the first accommodating chamber 11. Specifically, the groove 24 may surround the body 22 along the circumference of the body 22, and the plurality of grooves 24 are radially arranged in sequence. Since the aperture of the groove 24 is smaller than the aperture of the first accommodating chamber 11, the flow rate of the coolant becomes faster in the process of entering the groove 24 through the first accommodating chamber 11, so that the liquid pressure on the bottom part of the groove 24 of the boss 23 relative to the notch position of the groove 24 will be further increased, so when the liquid cooling pipe 5 is deformed, it can effectively increase the moving speed of the conductive structure 2, which is conducive to further improving the safety of the charging gun.

[0042] It is worth mentioning that the body 22 and the boss 23 can be an integrated structure, which can improve the overall strength of the conductive structure 2.

[0043] Continue to refer Figure 2 It is worth mentioning that the charging gun also includes a crimping piece 7, which is located between the conductive structure 2 and the cable 4, and the crimping piece 7 is made of a conductive material. The charging gun provided by the present application is used to insert the cable 4 into the second blind hole of the crimping piece 7, and apply pressure to the outer wall of the crimping piece 7 through the hydraulic cylinder so that the side wall of the second blind hole abuts against the cable 4. This can effectively improve the connection strength between the cable 4 and the crimping piece 7, and improve the contact reliability between the crimping piece 7 and the cable 4. When the conductive structure 2 contacts the crimping piece 7, the contact reliability and electrical connection stability between the conductive structure 2 and the cable 4 are further improved.

[0044] In a specific embodiment, Figure 2 As shown, the charging gun also includes a locking end cap 8, the terminal structure 3 is plugged into the second accommodating cavity 12, the locking end cap 8 is sleeved on the terminal structure 3, and the locking end cap 8 is detachably connected to the housing 1. Exemplarily, the locking end cap 8 is threadedly connected to the housing 1. And the terminal structure 3 is fixedly connected to the housing 1 through the locking end cap 8. In this way, the terminal structure 3 can be detachably connected to the housing 1, thereby improving the convenience of replacement or maintenance of the terminal structure 3.

[0045] In addition, the charging gun further includes a sealing ring 9, which is sleeved on the terminal structure 3 and abuts against the outer wall of the terminal structure 3 and the inner wall of the housing 1 to seal the second accommodating chamber 12. When the coolant is squeezed into the second accommodating chamber 12, the possibility of the coolant overflowing from the second accommodating chamber 12 is reduced.

[0046] Specifically, the terminal structure 3 further includes a groove, and the groove is arranged around the outer wall of the terminal structure 3 along the axis of the terminal structure 3, and the sealing ring 9 is interference fit with the groove and the inner wall of the housing 1 to improve the overall sealing of the charging gun.

[0047] When the charging gun provided in this application is used in a charging system, refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of the charging system provided in this application when it is in normal working state. The charging system includes a charging pile 01, a liquid storage tank ( Figure 6 (not shown) and the charging gun provided in the present application, the liquid storage tank is filled with coolant, the first accommodating chamber 11 is connected to the liquid storage tank through the liquid cooling pipe 5, and the cable 4 is electrically connected to the charging pile 01.

[0048] Figure 7 This is a schematic diagram of a structure when the charging system provided by this application is in an abnormal state. Figure 3 and Figure 7 When the liquid cooling pipe 5 storing the coolant is deformed, a part of the liquid in the liquid cooling pipe 5 will quickly flow to the first accommodating chamber 11 along the liquid inlet pipe 51 and the liquid return pipe 52, which will cause the liquid pressure in the first accommodating chamber 11 to increase instantaneously, and the conductive structure 2 will move toward the second accommodating chamber 12, so that the conductive structure 2 can be electrically disconnected from the cable 4, thereby preventing the cable 4 from continuing to supply power and abnormally heating when an abnormality occurs in the liquid cooling pipe 5.

[0049] In addition, the charging gun provided in the present application can relieve the pressure inside the liquid cooling pipe 5 by changing the volume of the first accommodating chamber 11 when an abnormality occurs in the liquid cooling pipe 5, thereby reducing the risk of pipe damage and coolant leakage, thereby improving the safety of the entire system.

[0050] In summary, the charging gun provided in the present application sets a movable conductive structure 2 between the cable 4 and the terminal structure 3, and utilizes the change of liquid pressure in the first accommodating chamber 11 to move the conductive structure 2 in the inner cavity of the shell 1, so as to change the volume of the first accommodating chamber 11 while realizing the power on and off between the conductive structure 2 and the cable 4 and the pressure relief of the liquid cooling pipe 5, thereby improving the safety of the charging gun.

[0051] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A charging gun, characterized in that: It includes a housing, a conductive structure, a terminal structure, a cable and a liquid cooling pipe, wherein the cable is used to be electrically connected to the charging pile, wherein: The conductive structure is inserted in the shell, and along the axial direction of the shell, the conductive structure divides the inner cavity of the shell into two opposite first accommodating cavities and a second accommodating cavities, the first accommodating cavities are connected to the liquid cooling pipeline; and the conductive structure can move along the axial direction of the shell; The terminal structure is connected to the housing, and the terminal structure includes a first blind hole, the opening end of the first blind hole faces the second accommodation cavity, at least a part of the conductive structure is inserted into the first blind hole, and the terminal structure is electrically connected to the conductive structure; Along the axial direction of the housing, one end of the conductive structure away from the terminal structure is arranged opposite to the cable, and when the conductive structure contacts the cable, the conductive structure is electrically connected to the cable; When one end of the conductive structure facing away from the terminal structure is separated from the cable, the conductive structure is electrically disconnected from the cable; When the liquid cooling pipe storing coolant is deformed, part of the coolant in the liquid cooling pipe flows to the first accommodating chamber, the liquid pressure in the first accommodating chamber increases instantaneously, the conductive structure moves toward the second accommodating chamber, and the conductive structure is electrically disconnected from the cable.

2. The charging gun according to claim 1, characterized in that: The charging gun further includes an elastic structural member, one end of which abuts against the bottom of the first blind hole, and the other end of which abuts against the conductive structure.

3. The charging gun according to claim 2, characterized in that: A first connecting column is disposed in the first blind hole, and the first connecting column is located at the bottom of the first blind hole; the conductive structure includes a second connecting column, and the second connecting column is disposed opposite to the first connecting column; One end of the elastic structure is sleeved on the first connecting column, and the other end of the elastic structure is sleeved on the second connecting column.

4. The charging gun according to claim 3, characterized in that: The terminal structure further includes a limiting rib, and the limiting rib is located on the inner side wall of the first blind hole; the conductive structure includes a clamping portion, and the clamping portion is used to clamp with the limiting rib.

5. The charging gun according to claim 1, characterized in that: At least a portion of the sidewall of the conductive structure abuts against the sidewall of the first blind hole.

6. The charging gun according to claim 1, characterized in that: The conductive structure includes a body and a boss, at least a portion of the body is inserted into the first blind hole; the boss is arranged on the side wall of the body around the axis of the body, and the boss abuts against the inner side wall of the shell.

7. The charging gun according to claim 1, characterized in that: The charging gun further includes a crimping piece, which is located between the conductive structure and the cable; the crimping piece includes a second blind hole, the cable is plugged into the second blind hole, and the cable abuts against a side wall of the second blind hole; When the conductive structure contacts the crimping piece, the conductive structure is electrically connected to the cable through the crimping piece.

8. The charging gun according to claim 1, characterized in that: The charging gun also includes a locking end cover, and the terminal structure is plugged into the second accommodating cavity; the locking end cover is sleeved on the terminal structure, and the locking end cover is detachably connected to the shell; the terminal structure is fixedly connected to the shell through the locking end cover.

9. The charging gun according to claim 8, characterized in that: The charging gun further includes a sealing ring, which is sleeved on the terminal structure and abuts against an outer side wall of the terminal structure and an inner side wall of the shell.

10. A charging system, characterized in that: It comprises a charging pile, a liquid storage tank and a charging gun as described in any one of claims 1 to 9, the liquid storage tank is filled with coolant, the second accommodating chamber is connected to the liquid storage tank through the liquid cooling pipe; the cable is electrically connected to the charging pile.

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