Charging gun cooling system and charging gun

Abstract

The invention relates to the technical field of charging guns, and particularly discloses a charging gun cooling system and a charging gun. In the charging gun cooling system, in a head cooling assembly, a cooling cavity is provided with a liquid inlet and a liquid outlet, a supporting frame accommodates the connecting end of a first terminal and the connecting end of a second terminal, and the cooling cavity is located between the first terminal and the second terminal; the liquid input pipe is communicated with the liquid inlet; the liquid output pipe is communicated with the liquid outlet; the liquid input pipe is connected with a first cable, the liquid output pipe is connected with a second cable, the first cable is connected with the connecting end of the first terminal, the second cable is connected with the connecting end of the second terminal, and the first cable and the second cable are connected with the first conductive part in the two connecting boxes respectively; the liquid input pipe and the liquid output pipe penetrate through the two connecting boxes respectively. According to the above arrangement, the temperature of the joint of the first cable and the first terminal connecting end, the temperature of the joint of the second cable and the second terminal connecting end and the temperature of the first conductive part can be reduced, and the charging efficiency is improved.

Description

[0001] This application is a divisional application of patent application No. 2021113822131 (the filing date of the original application is November 19, 2021, and the name of the invention is A charging gun cooling system and charging gun). Technical Field

[0002] The present invention relates to the technical field of charging guns, and in particular to a charging gun cooling system and a charging gun. Background Art

[0003] With the popularity of new energy electric vehicles, the development of DC fast charging technology is becoming more and more important. As an important component of DC charging guns, there are many mature products on the market. In order to increase the charging speed, shorten the charging time and provide better user experience, the charging current and power of DC charging guns for loads will inevitably become larger and larger.

[0004] During the charging process of electric vehicles, the charging current is between 500A-600A. A large amount of heat will be generated at the connection between the cable and the first and second charging terminals, as well as at the connection between the cable and the external power supply, causing the temperature to rise, thereby reducing the charging efficiency. The higher temperature will cause greater damage to the charging gun, and excessively high temperature may even cause a fire hazard. Summary of the invention

[0005] An object of the present invention is to provide a charging gun cooling system and a charging gun, so as to reduce the temperature of the connection between the cable and the first terminal and the connection between the cable and the second terminal.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In one aspect, the present invention provides a charging gun cooling system, the charging gun cooling system comprising:

[0008] A head cooling assembly, the head cooling assembly comprising a support frame and a cooling cavity, the cooling cavity being provided with a liquid inlet and a liquid outlet, the support frame being configured to accommodate a connecting end of a first terminal and a connecting end of a second terminal, the cooling cavity being provided on the support frame, and the cooling cavity being configured to be located between the first terminal and the second terminal;

[0009] A liquid input pipe, the liquid input pipe is connected to the liquid inlet;

[0010] a liquid output pipe, the liquid output pipe being in communication with the liquid outlet; the liquid input pipe being connected to a first cable, the liquid output pipe being connected to a second cable, the first cable being used to be connected to the connection end of the first terminal, and the second cable being used to be connected to the connection end of the second terminal;

[0011] The tail cooling assembly includes two connection boxes, the connection boxes are configured to accommodate a first conductive member, the first cable and the second cable are respectively connected to the first conductive member in the two connection boxes; the liquid input pipe and the liquid output pipe pass through the two connection boxes respectively.

[0012] As an optional technical solution for the cooling system of a charging gun, the connection box includes a box body and a cover body, the box body is provided with a first lower through groove, a second lower through groove and a third lower through groove; the cover body is provided with a first upper through groove, a second upper through groove and a protrusion; when the cover body is covered on the box body, the first lower through groove and the first upper through groove are arranged to form a first channel; the second lower through groove and the second upper through groove are arranged to form a second channel; the third lower through groove and the protrusion are arranged to form a third channel; the liquid output pipe and / or the liquid input pipe penetrate into the connection box through the second channel and pass out from the first channel; the first conductive member penetrates into the connection box through the third channel so that part of the first conductive member is located inside the connection box.

[0013] As an optional technical solution for the cooling system of a charging gun, the connection box also includes a first sealing ring, a second sealing ring and a third sealing ring; the first sealing ring, the second sealing ring and the third sealing ring are used to seal the first channel, the second channel and the third channel respectively.

[0014] As an optional technical solution for the cooling system of a charging gun, the first sealing ring, the second sealing ring and the third sealing ring are all provided with annular avoidance grooves in their circumferential directions, the connecting box also includes a sealing strip, the end surface of the box body facing the cover body is provided with a first annular groove, and the end surface of the cover body facing the box body is provided with a second annular groove, when the cover body is covered on the box body, the first annular groove, the second annular groove and each of the annular avoidance grooves form a sealed cavity, and the sealing strip is arranged in the sealed cavity.

[0015] As an optional technical solution for a charging gun cooling system, a first avoidance groove is provided on the inner side wall of the first channel; a second avoidance groove is provided on the inner side wall of the second channel; a third avoidance groove is provided on the inner side wall of the third channel; the first sealing ring, the second sealing ring and the third sealing ring are respectively arranged in the first avoidance groove, the second avoidance groove and the third avoidance groove.

[0016] As an optional technical solution for the charging gun cooling system, the first cable is connected to the first conductive member through the second conductive member; the second cable is connected to the first conductive member through the second conductive member; wherein,

[0017] The second conductive member is a copper sheet; and / or,

[0018] The first conductive member is a copper busbar.

[0019] As an optional technical solution for the cooling system of a charging gun, the box body and the cover body are screwed together, wherein the box body is provided with a first connecting column, the first connecting column is provided with a screw hole, the cover body is provided with a second connecting column, the second connecting column is provided with a through hole, and when the cover body is covered on the box body, the locking screw passes through the through hole and is screwed into the screw hole.

[0020] As an optional technical solution for a charging gun cooling system, the cover body is provided with a nozzle, through which heat dissipation glue can be poured into the connection box.

[0021] As an optional technical solution for the cooling system of the charging gun, a portion of the first conductive member located outside the connection box is provided with a connection hole, and the connection hole is used to allow an external conductive wire to pass through and then be tied to the first conductive member.

[0022] As an optional technical solution for a charging gun cooling system, the cooling cavity includes a first liquid storage area, a second liquid storage area, and a connecting area connecting the first liquid storage area and the second liquid storage area; the liquid inlet is connected to the first liquid storage area; the liquid outlet is connected to the second liquid storage area, the first liquid storage area is configured to be adjacent to the connecting end of the first terminal, and the second liquid storage area is configured to be adjacent to the connecting end of the second terminal.

[0023] As an optional technical solution for the charging gun cooling system, a guide member is provided on the inner wall of the cooling cavity. The guide member is located in the communication area and extends to a predetermined height along the height direction of the cooling cavity.

[0024] As an optional technical solution for the cooling system of a charging gun, two liquid inlets and two liquid outlets are provided, each of the liquid inlets is connected to a liquid input pipe, and each of the liquid outlets is connected to a liquid output pipe, and the two liquid inlets are spaced apart in the first liquid storage area along the height direction of the cooling cavity; the two liquid outlets are spaced apart in the second liquid storage area along the height direction of the cooling cavity.

[0025] As an optional technical solution for a charging gun cooling system, the head cooling assembly also includes a first heat conductor, which is configured to be arranged between the connecting end of the first terminal and the cooling cavity and / or between the connecting end of the second terminal and the cooling cavity.

[0026] As an optional technical solution for the cooling system of a charging gun, the head cooling assembly also includes a second heat conductor; the second heat conductor is configured to be arranged between the connecting end of the first terminal and the support frame and / or between the connecting end of the second terminal and the support frame; the connecting end of the first terminal and the connecting end of the second terminal are both flat and have a planar cable connection surface; the cable connection surface and the second heat conductor are sealed by pouring thermal conductive glue.

[0027] As an optional technical solution for a charging gun cooling system, the head cooling assembly also includes a temperature detection component, the second heat conductive component is provided with an installation groove, and the temperature detection component is arranged in the installation groove for detecting the temperature of the connecting end of the first terminal and / or the temperature of the connecting end of the second terminal.

[0028] As an optional technical solution for a charging gun cooling system, the connecting end of the first terminal and the connecting end of the second terminal are both flat and have a planar cable connection surface; the cable connection surface is arranged perpendicular to the arrangement direction of the first terminal and the second terminal.

[0029] On the other hand, the present invention provides a charging gun, comprising the charging gun cooling system described in any one of the above technical solutions, the first terminal, the second terminal, the first cable and the second cable, the connecting end of the first terminal and the connecting end of the second terminal are both arranged on the support frame, the cooling cavity is located between the first terminal and the second terminal, the first cable is laid on the outer surface of the liquid input pipe and is connected to the connecting end of the first terminal, and the second cable is laid on the outer surface of the liquid output pipe and is connected to the connecting end of the second terminal.

[0030] As an optional technical solution for the cooling system of a charging gun, the connecting end of the first terminal and the connecting end of the second terminal are both flat and have a planar cable connection surface, one end of the first cable is distributed and fixed to the cable connection surface of the first terminal, and one end of the second cable is distributed and fixed to the cable connection surface of the second terminal.

[0031] As an optional technical solution for the cooling system of a charging gun, the head cooling assembly also includes a first heat conductor and a second heat conductor, the first heat conductor covers the connecting end of the first terminal and exposes the cable connecting surface and / or covers the connecting end of the second terminal and exposes the cable connecting surface; the second heat conductor is arranged between the connecting end of the first terminal and the supporting frame and / or between the connecting end of the second terminal and the supporting frame, the first heat conductor and the second heat conductor are both U-shaped and the openings are arranged opposite to each other, the flat connecting end of the first terminal and / or the flat connecting end of the second terminal are located between the corresponding first heat conductor and the second heat conductor.

[0032] The beneficial effects of the present invention are:

[0033] The present invention provides a charging gun cooling system, which includes a head cooling component, a liquid input pipe and a liquid output pipe. The head cooling component includes a support frame and a cooling cavity, the cooling cavity is provided with a liquid inlet and a liquid outlet, the support frame is configured to accommodate the connecting end of the first terminal and the connecting end of the second terminal, the cooling cavity is arranged on the support frame, and the cooling cavity is configured to be located between the first terminal and the second terminal; the liquid input pipe is connected to the liquid inlet; the liquid output pipe is connected to the liquid outlet; the outer surface of the liquid input pipe is used to lay the first cable, the outer surface of the liquid output pipe is used to lay the second cable, the first cable is used to connect to the connecting end of the first terminal, and the second cable is used to connect to the connecting end of the second terminal. The above arrangement enables the heat generated at the connection between the first cable and the first terminal connection end and the heat generated at the connection between the second cable and the second terminal connection end to be transferred to the cooling cavity. The coolant entering the cooling cavity from the liquid inlet absorbs the heat and then flows out from the liquid outlet, thereby taking the heat away, thereby reducing the temperature of the connection between the first cable and the first terminal connection end and the temperature of the connection between the second cable and the second terminal connection end; and by laying the first and second cables along the liquid inlet pipe or the liquid outlet pipe, the temperature of the entire first cable and the entire second cable can also be reduced, thereby improving the charging efficiency and reducing the harm to the charging gun.

[0034] The tail cooling assembly includes two connection boxes, which are configured to accommodate the first conductive member. The first cable and the second cable are connected to the first conductive member in the two connection boxes respectively; the liquid input pipe and the liquid output pipe pass through the two connection boxes respectively. The structural setting of the tail cooling assembly allows the heat at the connection between the first cable and the first conductive member and the heat at the connection between the second cable and the first conductive member to be taken away by the liquid input pipe and the liquid output pipe, thereby reducing the temperature of the two connections and reducing the charging risk.

[0035] The present invention provides a charging gun. Through the setting of the above-mentioned charging gun cooling system, the heat generated by the connecting end of the first terminal and the connecting end of the second terminal can be effectively dissipated, thereby effectively reducing the temperature of the connecting end of the first terminal and the temperature of the connecting end of the second terminal; in addition, the heat generated by the first cable and the second cable themselves can also be taken away by the coolant, thereby reducing the temperature of the first cable and the second cable; finally, the heat at the connection between the first cable and the first conductive part and the heat at the connection between the second cable and the first conductive part are taken away by the liquid input pipe and the liquid output pipe, thereby reducing the temperature of the two connections and reducing the charging risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of a charging gun in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of a charging gun cooling system in an embodiment of the present invention;

[0038] Figure 3 It is a schematic diagram of the exploded structure of the head cooling assembly in an embodiment of the present invention, excluding the support frame;

[0039] Figure 4 This is a schematic diagram of the structure of a head cooling assembly in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the exploded structure of the cooling cavity in an embodiment of the present invention;

[0041] Figure 6 It is a schematic diagram of the exploded structure of the first terminal, the first heat conducting member and the second heat conducting member according to an embodiment of the present invention;

[0042] Figure 7 Schematic diagram of the exploded structure of the tail cooling assembly in an embodiment of the present invention;

[0043] Figure 8 It is a structural schematic diagram of a box body in an embodiment of the present invention;

[0044] Fig. 9 This is a schematic diagram of the structure of the cover body in an embodiment of the present invention;

[0045] Fig.10 Schematic diagram of the structure of the first sealing ring in an embodiment of the present invention.

[0046] In the figure:

[0047] 100, first terminal; 101, cable connection surface; 200, second terminal; 300, first conductive member; 301, connection hole; 400, first cable; 401, second conductive member; 500, second cable;

[0048] 1. Head cooling assembly; 11. Support frame; 12. Cooling cavity; 121. Liquid inlet; 122. Liquid outlet; 123. Box body; 1231. Flow guide; 124. Box cover; 1201. First liquid storage area; 1202. Second liquid storage area; 1203. Communication area; 13. First heat conducting element; 14. Second heat conducting element; 15. Temperature detection element;

[0049] 2. Tail cooling assembly; 21. Connecting box; 211. Box body; 2111. First lower through groove; 2112. Second lower through groove; 2113. Third lower through groove; 2114. First annular groove; 212. Cover body; 2121. First upper through groove; 2122. Second upper through groove; 2123. Bump; 2124. Second annular groove; 2125. Inlet; 213. First sealing ring; 214. Second sealing ring; 215. Third sealing ring; 216. Sealing strip;

[0050] 3. Liquid inlet tube;

[0051] 4. Liquid output pipe;

[0052] 5. Tee pipe. DETAILED DESCRIPTION

[0053] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0057] Embodiment 1

[0058] like Figure 2-9 As shown, this embodiment provides a charging gun cooling system, which includes a head cooling assembly 1, a liquid input pipe 3 and a liquid output pipe 4. The head cooling assembly 1 includes a support frame 11 and a cooling cavity 12, the cooling cavity 12 is provided with a liquid inlet 121 and a liquid outlet 122, the support frame 11 is configured to accommodate the connecting end of the first terminal 100 and the connecting end of the second terminal 200, the cooling cavity 12 is provided on the support frame 11, and the cooling cavity 12 is configured to be located between the first terminal 100 and the second terminal 200; the liquid input pipe 3 is connected to the liquid inlet 121; the liquid output pipe 4 is connected to the liquid outlet 122; the outer surface of the liquid input pipe 3 is used to lay the first cable 400, and the outer surface of the liquid output pipe 4 is used to lay the second cable 500, the first cable 400 is used to connect to the connecting end of the first terminal 100, and the second cable 500 is used to connect to the connecting end of the second terminal 200. Optionally, the connection between the first cable 400 and the first terminal 100 and between the second cable 500 and the second terminal 200 can be ultrasonic welding. In some embodiments, the first terminal 100 is a positive terminal, and the first cable 400 is a positive cable; the second terminal 200 is a negative terminal, and the second cable 500 is a negative cable.

[0059] In this embodiment, the above-mentioned configuration enables the heat generated at the connection between the first cable 400 and the first terminal 100 and the connection between the second cable 500 and the second terminal 200 to be transferred to the cooling cavity 12, and the coolant entering the cooling cavity 12 from the liquid inlet 121 flows out from the liquid outlet 122 after absorbing the heat, thereby taking the heat away, thereby reducing the temperature of the connection between the first cable 400 and the first terminal 100 and the connection between the second cable 500 and the second terminal 200; and by laying the first cable 400 along the liquid input pipe 3 and the second cable 500 along the liquid output pipe 4, the temperature of the entire first cable 400 and the entire second cable 500 can also be reduced, thereby improving the charging efficiency and reducing the harm to the charging gun.

[0060] Combination Figure 5 As shown, in order to prevent the coolant from entering the cooling cavity 12 from the liquid inlet 121 and immediately entering the liquid outlet 122, in this embodiment, as a preference, the cooling cavity 12 includes a first liquid storage area 1201, a second liquid storage area 1202, and a connecting area 1203 connecting the first liquid storage area 1201 and the second liquid storage area 1202; the liquid inlet 121 connects the first liquid storage area 1201; the liquid outlet 122 connects the second liquid storage area 1202, the first liquid storage area 1201 is configured to be adjacent to the connection end of the first terminal 100, and the second liquid storage area 1202 is configured to be adjacent to the connection end of the second terminal 200. This arrangement allows the heat generated at the connection end of the first terminal 100 and the connection end of the second terminal 200 to enter the cooling cavity 12 through the side walls of the first liquid storage area 1201 and the second liquid storage area 1202, respectively, thereby improving the efficiency of heat transfer.

[0061] Furthermore, a guide member 1231 is provided on the inner wall of the cooling cavity 12, and the guide member 1231 is located in the connecting area 1203 and extends to a predetermined height in the height direction of the cooling cavity 12. With the arrangement of the above structure, the coolant can flow along the side walls of the first liquid storage area 1201, the second liquid storage area 1202 and the connecting area 1203 as much as possible, thereby improving the flow path of the coolant, thereby expanding the contact area between the flowing coolant and the cooling cavity 12, and improving the cooling effect of the cooling cavity 12 on the connecting ends of the second terminal 200 and the connecting ends of the first terminal 100 on both sides.

[0062] Furthermore, two guide members 1231 are provided, and are arranged opposite to each other up and down, so that the coolant entering the cooling cavity 12 through the upper liquid inlet 121 needs to pass through the upper guide member 1231 before entering the upper liquid outlet 122, and the coolant entering the cooling cavity 12 through the lower liquid inlet 121 needs to pass through the lower guide member 1231 before entering the lower liquid outlet 122, and this arrangement further optimizes the flow path of the coolant. Among them, the material of the cooling cavity 12 can be thermally conductive ceramic. Among them, the cooling cavity 12 includes a box body 123 and a box cover 124, and the box cover 124 is arranged behind the box body 123 to form a sealed cavity for containing the coolant. Preferably, the box body 123 is provided with a stop bar for stopping the box cover 124. Furthermore, the length of the guide member 1231 is consistent with the length of the stop bar, and the guide member 1231 is also used to stop the box cover 124. Preferably, the box cover 124 is provided with a sealing groove in the circumference, and when the box cover 124 is placed in the box body 123, the sealing groove and the inner wall of the box body 123 are surrounded to form an end sealing cavity, and the annular sealing member is arranged in the end sealing cavity. Optionally, a pressing plate is connected to the support frame 11, and presses the box cover 124 against the stop strip and the guide member 1231, wherein the pressing plate is not shown.

[0063] During use, when the liquid input pipe 3 or the liquid output pipe 4 is blocked, the cooling system of the charging gun will be unable to perform cooling work, thereby causing the temperature of the first terminal 100 and the second terminal 200 to rise, causing damage to the charging gun. In this embodiment, as a preference, there are two liquid inlets 121 and two liquid outlets 122, each of which is connected to a liquid input pipe 3, and each of which is connected to a liquid output pipe 4. The two liquid inlets 121 are arranged in the first liquid storage area 1201 along the height direction of the cooling cavity 12; the two liquid outlets 122 are arranged in the second liquid storage area 1202 along the height direction of the cooling cavity 12. This arrangement allows the other liquid input pipe 3 or liquid output pipe 4 to continue to transmit coolant when one of the liquid input pipes 3 or the liquid output pipe 4 is blocked, without affecting the cooling work of the first terminal 100 and the second terminal 200, thereby improving the smoothness of the charging work. Optionally, the liquid inlet 121 and the liquid input pipe 3 as well as the liquid outlet 122 and the liquid output pipe 4 are connected via a throat clamp.

[0064] Optionally, the box cover 124 is provided with four mounting holes, and the two liquid inlets 121 and the two liquid outlets 122 are respectively installed in the four mounting holes. This arrangement provides guidance for the installation of the liquid inlets 121 and the liquid outlets 122, and improves the installation efficiency.

[0065] Combination Figure 6As shown, preferably, the head cooling assembly 1 also includes a first heat conductive member 13, and the first heat conductive member 13 is configured to be arranged between the connecting end of the first terminal 100 and the cooling cavity 12 and / or between the connecting end of the second terminal 200 and the cooling cavity 12. In some embodiments, the first heat conductive member 13 is made of a heat conductive material having elasticity or buffering properties, preferably a heat conductive silicone. The provision of the first heat conductive member 13 improves the efficiency of heat transfer between the connecting end of the first terminal 100 and the cooling cavity 12 and / or between the connecting end of the second terminal 200 and the cooling cavity 12, and on the other hand, avoids rigid collision between the connecting end of the first terminal 100 and the cooling cavity 12 and / or between the connecting end of the second terminal 200 and the cooling cavity 12.

[0066] Furthermore, the head cooling assembly 1 also includes a second heat conductor 14; the second heat conductor 14 is configured to be arranged between the connecting end of the first terminal 100 and the support frame 11 and / or between the connecting end of the second terminal 200 and the support frame 11. In some embodiments, the second heat conductor 14 is made of a heat-conducting material having elasticity or buffering properties. Optionally, the material of the first heat conductor 13 is heat-conducting nylon. The provision of the second heat conductor 14 improves the heat transfer efficiency between the connecting end of the first terminal 100 and the support frame 11 and / or between the connecting end of the second terminal 200 and the support frame 11 on the one hand, and avoids rigid collision between the connecting end of the first terminal 100 and the support frame 11 and / or between the connecting end of the second terminal 200 and the support frame 11 on the other hand.

[0067] Combination Figure 3 As shown, in this embodiment, preferably, the head cooling assembly 1 further includes a temperature detection member 15, the second heat conducting member 14 is provided with a mounting groove, and the temperature detection member 15 is arranged in the mounting groove for detecting the temperature of the connection end of the first terminal 100 and / or the temperature of the connection end of the second terminal 200. This arrangement can accurately detect the temperature of the first terminal 100 and / or the second terminal 200 to avoid the occurrence of dangerous accidents.

[0068] Preferably, the connecting end of the first terminal 100 and the connecting end of the second terminal 200 are both flat and have a planar cable connecting surface 101; the cable connecting surface 101 is arranged perpendicular to the arrangement direction of the first terminal 100 and the second terminal 200. With the above arrangement, it is easy to achieve fixed connection with the first cable 400 or the second cable 500.

[0069] Combination Figure 7As shown, preferably, the charging gun cooling system further includes a rear cooling assembly 2, which includes two connection boxes 21, wherein the first conductive member 300 is partially located in the connection box 21, and the first cable 400 and the second cable 500 are respectively connected to the first conductive member 300 in the two connection boxes 21; the liquid input pipe 3 and the liquid output pipe 4 pass through the two connection boxes 21 respectively. The arrangement of the rear cooling assembly 2 allows the heat at the connection between the first cable 400, the second cable 500 and the first conductive member 300 to be taken away by the liquid input pipe 3, thereby reducing the temperature at the connection and reducing the charging risk.

[0070] Combination Figure 8-Figure 9 As shown, regarding the structure of the connection box 21, in this embodiment, specifically, the connection box 21 includes a box body 211 and a cover body 212, the box body 211 is provided with a first lower through groove 2111, a second lower through groove 2112 and a third lower through groove 2113; the cover body 212 is provided with a first upper through groove 2121, a second upper through groove 2122 and a protrusion 2123; when the cover body 212 is covered on the box body 211, the first lower through groove 2111 and the first upper through groove 2121 are arranged to form a first channel; the second lower through groove 2112 and the second upper through groove 2122 are arranged to form a second channel; the third lower through groove 2113 and the protrusion 2123 are arranged to form a third channel; the liquid output pipe 4 and / or the liquid input pipe 3 penetrate into the connection box 21 through the second channel and pass out from the first channel; the first conductive member 300 penetrates into the connection box 21 through the third channel. This arrangement facilitates the installation of the liquid output tube 4, the liquid output tube 4, the first conductive member 300 and the cable, and the structure with the semi-enclosed through groove or protrusion is conducive to the production of the box body 211 and the cover body 212. On the other hand, the cooperation between the protrusion 2123 and the third lower through groove 2113 can also effectively prevent the box body 211 and the cover body 212 from being misaligned during installation.

[0071] In this embodiment, preferably, the first cable 400 and the second cable 500 are both connected via the second conductive member 401 and the first conductive member 300. Preferably, the second conductive member 401 is a copper sheet, the first conductive member 300 is a copper bar, and the copper sheet and the copper bar are connected by ultrasonic welding. Furthermore, the first conductive member 300 is provided with a connection hole 301, and the external conductive wire is tied to the first conductive member 300 after passing through the connection hole 301. With the arrangement of the above structure, the firmness of the connection between the second conductive member 401 and the external conductive wire is improved.

[0072] Regarding the connection between the box body 211 and the cover body 212, in this embodiment, a screw connection can be selected. Specifically, the box body 211 is provided with a first connection column, the first connection column is provided with a screw hole, the cover body 212 is provided with a second connection column, the second connection column is provided with a through hole, when the cover body 212 is covered on the box body 211, the locking screw passes through the through hole and is screwed into the screw hole. Furthermore, a positioning groove is provided at the end of the second connection column, the through hole and the positioning groove are connected, and when the cover body 212 is covered on the box body 211, the first connection column is inserted into the positioning groove.

[0073] Optionally, the connection box 21 further includes a first sealing ring 213, a second sealing ring 214 and a third sealing ring 215; the first sealing ring 213, the second sealing ring 214 and the third sealing ring 215 are used to seal the first channel, the second channel and the third channel respectively. In this embodiment, the internal space of the connection box 21 is isolated from the external environment by means of the arrangement of the first sealing ring 213, the second sealing ring 214 and the third sealing ring 215, so as to prevent the connection between the internal first conductive member 300 and the first cable 400 or the second cable 500 from being damp, thereby improving the safety performance of the cooling system.

[0074] Combination Fig.10 As shown, further, the first sealing ring 213, the second sealing ring 214 and the third sealing ring 215 are all provided with annular avoidance grooves in their circumferential directions, the connection box 21 also includes a sealing strip 216, the end surface of the box body 211 facing the cover body 212 is provided with a first annular groove 2114, the end surface of the cover body 212 facing the box body 211 is provided with a second annular groove 2124, when the cover body 212 is covered on the box body 211, the first annular groove 2114 and the second annular groove 2124 and each annular avoidance groove form a sealing cavity, and the sealing strip 216 is arranged in the sealing cavity. The above-mentioned structure is further improved in the sealing effect of the connection box 21.

[0075] Furthermore, the cover 212 is provided with a nozzle 2125, through which the heat dissipation glue can be poured into the connection box 21. With the above arrangement, the sealing effect inside the connection box 21 can be further improved, and it is beneficial to transfer the heat generated at the connection between the first conductive member 300 and the first cable 400 to the liquid input pipe 3 or the side wall of the connection box 21, and the heat generated at the connection between the first conductive member 300 and the second cable 500 to the liquid output pipe 4 or the side wall of the connection box 21, thereby improving the speed of heat dissipation. In addition, since the connection box 21 is sealed under the action of the first sealing ring 213, the second sealing ring 214, the third sealing ring 215 and the sealing strip 216, the heat dissipation glue will not leak during the pouring process.

[0076] Preferably, the inner wall of the first channel is provided with a first avoidance groove; the inner wall of the second channel is provided with a second avoidance groove; the inner wall of the third channel is provided with a third avoidance groove; the first sealing ring 213, the second sealing ring 214 and the third sealing ring 215 are respectively arranged in the first avoidance groove, the second avoidance groove and the third avoidance groove. This arrangement improves the firmness of the connection between the first sealing ring 213, the second sealing ring 214 and the third sealing ring 215 and the connection box 21.

[0077] Optionally, two first cables 400 and two second cables 500 are provided, and two liquid input pipes 3 and two liquid output pipes 4 are provided. The two first cables 400 are laid along the outer surfaces of the two liquid input pipes 3 respectively; the two second cables 500 are laid along the outer surfaces of the two liquid output pipes 4 respectively. This arrangement ensures that when one first cable 400 or the second cable 500 is damaged, it will not affect the normal charging of the charging gun. The first cable 400 and the liquid input pipe 3 are wrapped with an insulating sleeve, and the second cable 500 and the liquid output pipe 4 are also wrapped with an insulating sleeve.

[0078] In this embodiment, optionally, the two liquid input pipes 3 are connected to the cooling pump through a three-way pipe 5 and an adapter; the two liquid output pipes 4 are connected to the cooling pump through a three-way pipe 5 and an adapter respectively. With the above arrangement, the arrangement of the pipelines can be reduced, the installation efficiency of the cooling system is improved, and the transfer of the charging gun is facilitated.

[0079] Optionally, the head cooling assembly 1 and the tail cooling assembly 2 both include a liquid leakage detection member, which is used to detect leaked liquid. This arrangement enables the liquid leakage detection member to detect when liquid leaks from the head cooling assembly 1 or the tail cooling assembly 2, thereby reducing the risk of the charging gun.

[0080] Embodiment 2

[0081] Combination Figure 1-Figure 6 As shown, this embodiment also provides a charging gun, including the charging gun cooling system in the above scheme, the first terminal 100, the second terminal 200, the first cable 400 and the second cable 500, the connection end of the first terminal 100 and the connection end of the second terminal 200 are both arranged on the support frame 11, the cooling cavity 12 is located between the first terminal 100 and the second terminal 200, the first cable 400 is laid on the outer surface of the liquid input pipe 3 and connected to the connection end of the first terminal 100, and the second cable 500 is laid on the outer surface of the liquid output pipe 4 and connected to the connection end of the second terminal 200. Through the above arrangement, the heat generated by the connection end of the first terminal 100 and the connection end of the second terminal 200 can be effectively extracted, and the temperature of the connection end of the first terminal 100 and the temperature of the connection end of the second terminal 200 can be effectively reduced; in addition, the heat generated by the first cable 400 and the second cable 500 themselves can also be taken away by the coolant, so that the temperature is reduced.

[0082] In this embodiment, preferably, the connecting end of the first terminal 100 and the connecting end of the second terminal 200 are both flat and have a planar cable connection surface 101, one end of the first cable 400 is distributed and fixed to the cable connection surface 101 of the first terminal 100, and one end of the second cable 500 is distributed and fixed to the cable connection surface 101 of the second terminal 200. With the above arrangement, a stable and good connection with the first cable 400 or the second cable 500 can be easily achieved.

[0083] Preferably, the head cooling assembly 1 also includes a first heat conductive member 13 and a second heat conductive member 14, the first heat conductive member 13 covers the connecting end of the first terminal 100 and exposes the cable connecting surface 101 and / or covers the connecting end of the second terminal 200 and exposes the cable connecting surface 101; the second heat conductive member 14 is arranged between the connecting end of the first terminal 100 and the support frame 11 and / or between the connecting end of the second terminal 200 and the support frame 11, and the first heat conductive member 13 and the second heat conductive member 14 are both U-shaped and the openings are arranged opposite to each other. This arrangement allows the heat generated by the connecting end of the first terminal 100 and the connecting end of the second terminal 200 to be dissipated by heat transfer, and the cooling effect is obvious. Due to the connection of the first cable 400 or the second cable 500, the second heat conductive member 14 and the cable connecting surface 101 cannot fit tightly. To this end, in the present embodiment, preferably, thermally conductive adhesive is poured and sealed inside the support frame 11, at each gap between the support frame 11 and the cooling cavity 12, the first heat conductor 13, and the second heat conductor 14, especially between the cable connection surface 101 and the second heat conductor 14. This arrangement further improves the internal heat transfer effect and reduces the risk of charging. With the aid of the above-mentioned structural arrangement, the heat-conducting structure can cover the connecting end of the first terminal 100 and the connecting end of the second terminal 200, thereby expanding the heat transfer area between the connecting end of the first terminal 100 and the connecting end of the second terminal 200, thereby making it easier to transfer heat and achieving a better cooling effect.

[0084] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A charging gun cooling system, characterized in that: include: A head cooling assembly (1), the head cooling assembly (1) comprising a support frame (11) and a cooling cavity (12), the cooling cavity (12) being provided with a liquid inlet (121) and a liquid outlet (122), the support frame (11) being configured to accommodate a connecting end of a first terminal (100) and a connecting end of a second terminal (200), the cooling cavity (12) being provided on the support frame (11), and the cooling cavity (12) being configured to be located between the first terminal (100) and the second terminal (200); a liquid input pipe (3), the liquid input pipe (3) being in communication with the liquid inlet (121); a liquid output pipe (4), the liquid output pipe (4) being in communication with the liquid outlet (122); the liquid input pipe (3) being connected to a first cable (400), the liquid output pipe (4) being connected to a second cable (500), the first cable (400) being used to be connected to the connection end of the first terminal (100), and the second cable (500) being used to be connected to the connection end of the second terminal (200); A tail cooling assembly (2), the tail cooling assembly (2) comprising two connection boxes (21), the connection boxes (21) being configured to accommodate a first conductive member (300), the first cable (400) and the second cable (500) being connected to the first conductive member (300) in the two connection boxes (21), respectively; the liquid input pipe (3) and the liquid output pipe (4) respectively passing through the two connection boxes (21).

2. The charging gun cooling system according to claim 1, characterized in that: The connection box (21) comprises a box body (211) and a cover body (212); the box body (211) is provided with a first lower through groove (2111), a second lower through groove (2112) and a third lower through groove (2113); the cover body (212) is provided with a first upper through groove (2121), a second upper through groove (2122) and a protrusion (2123); when the cover body (212) is covered on the box body (211), the first lower through groove (2111) and the first upper through groove (2121) are arranged to form a first channel; the first The second lower through grooves (2112) and the second upper through groove (2122) are arranged to form a second channel; the third lower through groove (2113) and the protrusion (2123) are arranged to form a third channel; the liquid output pipe (4) and / or the liquid input pipe (3) penetrate into the connection box (21) through the second channel and pass out from the first channel; the first conductive member (300) penetrates into the connection box (21) through the third channel so that a portion of the first conductive member (300) is located inside the connection box (21).

3. The charging gun cooling system according to claim 2, characterized in that: The connection box (21) further comprises a first sealing ring (213), a second sealing ring (214) and a third sealing ring (215); the first sealing ring (213), the second sealing ring (214) and the third sealing ring (215) are used to seal the first channel, the second channel and the third channel respectively.

4. The charging gun cooling system according to claim 3, characterized in that: The first sealing ring (213), the second sealing ring (214) and the third sealing ring (215) are all provided with annular avoidance grooves in their circumferential directions. The connection box (21) further comprises a sealing strip (216). The end surface of the box body (211) facing the cover body (212) is provided with a first annular groove (2114), and the end surface of the cover body (212) facing the box body (211) is provided with a second annular groove (2124). When the cover body (212) is covered on the box body (211), the first annular groove (2114), the second annular groove (2124) and each of the annular avoidance grooves form a sealing cavity, and the sealing strip (216) is arranged in the sealing cavity.

5. The charging gun cooling system according to claim 3, characterized in that: The inner side wall of the first channel is provided with a first avoidance groove; the inner side wall of the second channel is provided with a second avoidance groove; the inner side wall of the third channel is provided with a third avoidance groove; the first sealing ring (213), the second sealing ring (214) and the third sealing ring (215) are respectively arranged in the first avoidance groove, the second avoidance groove and the third avoidance groove.

6. The charging gun cooling system according to claim 2, characterized in that: The first cable (400) is connected to the first conductive member (300) via the second conductive member (401); the second cable (500) is connected to the first conductive member (300) via the second conductive member (401); wherein, The second conductive member (401) is a copper sheet; and / or, The first conductive member (300) is a copper busbar.

7. The charging gun cooling system according to claim 2, characterized in that: The box body (211) and the cover body (212) are screwed together, wherein the box body (211) is provided with a first connecting column, the first connecting column is provided with a screw hole, the cover body (212) is provided with a second connecting column, the second connecting column is provided with a through hole, and when the cover body (212) is covered on the box body (211), the locking screw passes through the through hole and is screwed into the screw hole.

8. The charging gun cooling system according to claim 2, characterized in that: The cover body (212) is provided with a nozzle (2125), and heat dissipation glue can be poured into the connection box (21) through the nozzle (2125).

9. The charging gun cooling system according to claim 2, characterized in that: The portion of the first conductive member (300) located outside the connection box (21) is provided with a connection hole (301), and the connection hole (301) is used to allow an external conductive wire to pass through and then be tied to the first conductive member (300).

10. The charging gun cooling system according to claim 1, characterized in that: The cooling cavity (12) comprises a first liquid storage area (1201), a second liquid storage area (1202), and a connecting area (1203) connecting the first liquid storage area (1201) and the second liquid storage area (1202); the liquid inlet (121) is connected to the first liquid storage area (1201); the liquid outlet (122) is connected to the second liquid storage area (1202); the first liquid storage area (1201) is configured to be adjacent to the connecting end of the first terminal (100), and the second liquid storage area (1202) is configured to be adjacent to the connecting end of the second terminal (200).

11. The charging gun cooling system according to claim 10, characterized in that: The inner wall of the cooling cavity (12) is provided with a flow guide (1231), and the flow guide (1231) is located in the communication area (1203) and extends to a predetermined height along the height direction of the cooling cavity (12).

12. The charging gun cooling system according to claim 10, characterized in that: Two of the liquid inlets (121) and two of the liquid outlets (122) are provided, each of the liquid inlets (121) is connected to one of the liquid input pipes (3), and each of the liquid outlets (122) is connected to one of the liquid output pipes (4). The two liquid inlets (121) are arranged at intervals in the first liquid storage area (1201) along the height direction of the cooling cavity (12); and the two liquid outlets (122) are arranged at intervals in the second liquid storage area (1202) along the height direction of the cooling cavity (12).

13. The charging gun cooling system according to claim 1, characterized in that: The head cooling assembly (1) further comprises a first heat conducting member (13), wherein the first heat conducting member (13) is configured to be arranged between the connecting end of the first terminal (100) and the cooling cavity (12) and / or between the connecting end of the second terminal (200) and the cooling cavity (12).

14. The charging gun cooling system according to claim 1, characterized in that: The head cooling assembly (1) further comprises a second heat-conducting member (14); the second heat-conducting member (14) is configured to be arranged between the connecting end of the first terminal (100) and the support frame (11) and / or between the connecting end of the second terminal (200) and the support frame (11); the connecting end of the first terminal (100) and the connecting end of the second terminal (200) are both flat and have a planar cable connection surface (101); a heat-conducting adhesive is poured between the cable connection surface (101) and the second heat-conducting member (14) for sealing.

15. The charging gun cooling system according to claim 14, characterized in that: The head cooling assembly (1) further comprises a temperature detection member (15), the second heat conducting member (14) being provided with a mounting groove, the temperature detection member (15) being arranged in the mounting groove and being used for detecting the temperature of the connecting end of the first terminal (100) and / or the temperature of the connecting end of the second terminal (200).

16. The charging gun cooling system according to claim 1, characterized in that: The connecting end of the first terminal (100) and the connecting end of the second terminal (200) are both flat and have a planar cable connection surface (101); the cable connection surface (101) is arranged perpendicular to the arrangement direction of the first terminal (100) and the second terminal (200).

17. A charging gun, characterized in that: The charging gun cooling system comprises the first terminal (100), the second terminal (200), the first cable (400) and the second cable (500), wherein the connection end of the first terminal (100) and the connection end of the second terminal (200) are both arranged on the support frame (11), the cooling cavity (12) is located between the first terminal (100) and the second terminal (200), the first cable (400) is laid on the outer surface of the liquid input pipe (3) and is connected to the connection end of the first terminal (100), and the second cable (500) is laid on the outer surface of the liquid output pipe (4) and is connected to the connection end of the second terminal (200).

18. The charging gun according to claim 17, characterized in that: The connecting end of the first terminal (100) and the connecting end of the second terminal (200) are both flat and have a planar cable connection surface (101); one end of the first cable (400) is fixed to the cable connection surface (101) of the first terminal (100); and one end of the second cable (500) is fixed to the cable connection surface (101) of the second terminal (200).

19. The charging gun according to claim 18, characterized in that: The head cooling assembly (1) further comprises a first heat conductive member (13) and a second heat conductive member (14), wherein the first heat conductive member (13) covers the connecting end of the first terminal (100) and exposes the cable connecting surface (101) and / or covers the connecting end of the second terminal (200) and exposes the cable connecting surface (101); the second heat conductive member (14) is arranged between the connecting end of the first terminal (100) and the supporting frame (11) and / or between the connecting end of the second terminal (200) and the supporting frame (11), the first heat conductive member (13) and the second heat conductive member (14) are both U-shaped and their openings are arranged opposite to each other, and the flat-plate-shaped connecting end of the first terminal (100) and / or the flat-plate-shaped connecting end of the second terminal (200) are located between the corresponding first heat conductive member (13) and the second heat conductive member (14).

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