Liquid cooling charging gun

Abstract

The utility model belongs to the technical field of charging equipment, and discloses a liquid cooling charging gun, which comprises a gun body and a liquid cooling pipeline, and is characterized in that the gun body is provided with a positive charging terminal, a negative charging terminal, a positive cable connected to the positive charging terminal and a negative cable connected to the negative charging terminal; the liquid cooling pipeline comprises a first pipeline arranged outside the positive electrode cable in a sleeving manner, a second pipeline arranged outside the negative electrode cable, a communicating pipeline and a backflow pipeline communicating with the communicating pipeline, a first liquid inlet channel is formed between the first pipeline and the positive electrode cable, and a second liquid inlet channel is formed between the second pipeline and the negative electrode cable; one end of the communicating pipeline is communicated with one end, close to the positive electrode charging terminal, of the first liquid inlet channel, and the other end of the communicating pipeline is communicated with one end, close to the negative electrode charging terminal, of the second liquid inlet channel, so that cooling liquid in the first liquid inlet channel and the second liquid inlet channel enters the backflow pipeline through the communicating pipeline and completes backflow; therefore, the cooling of the liquid cooling charging gun is realized, and the charging efficiency is ensured.

Description

Technical Field

[0001] This application belongs to the technical field of charging equipment, and specifically relates to a liquid-cooled charging gun. Background Technology

[0002] With the popularization of new energy electric vehicles, DC fast charging cabinets have developed rapidly. The charging gun is an important component of the charging cabinet, and its long-term safety has become a major concern. The charging gun generates a lot of heat during the charging process. On the one hand, high temperatures reduce charging efficiency, and on the other hand, excessively high temperatures pose safety hazards.

[0003] To ensure charging efficiency and eliminate safety hazards, two common solutions are currently used. One is to increase the diameter of the cable to reduce its heat generation, but this affects the ease of operation during charging. The other is to add a cooling system to cool the charging gun. Although this can reduce the temperature of the charging gun to some extent, the existing cooling systems are complex in structure and have low cooling efficiency, thus failing to guarantee charging efficiency and still posing safety hazards. Utility Model Content

[0004] This application provides a liquid-cooled charging gun to ensure charging efficiency and eliminate safety hazards.

[0005] The technical solution adopted in this application is as follows:

[0006] A liquid-cooled charging gun includes a gun body and a liquid-cooling pipeline. The gun body has a positive charging terminal, a negative charging terminal, a positive cable connected to the positive charging terminal, and a negative cable connected to the negative charging terminal. The liquid-cooling pipeline includes a first pipeline sleeved outside the positive cable, a second pipeline disposed outside the negative cable, a connecting pipeline, and a return pipeline connected to the connecting pipeline. A first liquid inlet channel is formed between the first pipeline and the positive cable, and a second liquid inlet channel is formed between the second pipeline and the negative cable. One end of the connecting pipeline is connected to the end of the first liquid inlet channel near the positive charging terminal, and the other end of the connecting pipeline is connected to the end of the second liquid inlet channel near the negative charging terminal, so that the coolant in the first liquid inlet channel and the second liquid inlet channel enters the return pipeline through the connecting pipeline and completes the return flow.

[0007] By adopting the above technical solution, when using the liquid-cooled charging gun of this application, the equipment for conveying coolant in the charging cabinet is connected to the first and second inlet channels, and the return pipe is connected to the container for storing coolant in the charging cabinet. When the liquid-cooled charging gun charges a new energy electric vehicle, the equipment for conveying coolant in the charging cabinet delivers coolant to the first and second inlet channels, thereby cooling the positive and negative cables respectively. The coolant in the first and second inlet channels enters the return pipe through the connecting pipe, so that the coolant exchanges heat with and cools the positive and negative cables before returning to the charging cabinet via the return pipe. This achieves the cooling of the liquid-cooled charging gun, greatly reducing its temperature, thus ensuring the charging efficiency of the liquid-cooled charging gun and eliminating safety hazards.

[0008] Furthermore, since the first liquid inlet channel and the second liquid inlet channel are connected by a connecting pipe, when the pumping equipment corresponding to the first liquid inlet channel and the second liquid inlet channel in the charging cabinet malfunctions, the coolant can enter the liquid inlet channel corresponding to the malfunctioning pumping equipment through the connecting pipe, so as to ensure the cooling efficiency of the liquid-cooled charging gun and thus ensure the safety of the liquid-cooled charging gun.

[0009] In addition, the improved cooling efficiency of the liquid-cooled charging gun also reduces the diameter of the positive and negative cables, thus improving the convenience for users when charging the liquid-cooled charging gun; at the same time, it simplifies the structure of the liquid-cooled charging gun and reduces its production cost.

[0010] Optionally, the positive cable has a positive crimp section, one end of which is connected to the positive charging terminal via a positive terminal connector, and the other end of which is provided with a positive pipeline connector. The positive pipeline connector and the positive terminal connector are hollow inside, and a first extension pipeline connecting the two is provided between the positive pipeline connector and the positive terminal connector. The first pipeline is connected to the positive pipeline connector.

[0011] The negative cable has a negative crimp section. One end of the negative crimp section is connected to the negative charging terminal via a negative terminal connector. The other end of the negative crimp section is provided with a negative conduit connector. The negative conduit connector and the negative terminal connector are hollow inside. A second extension conduit connecting the two is provided between the negative conduit connector and the negative terminal connector. The second conduit is connected to the negative conduit connector, and the two ends of the connecting conduit are respectively connected to the positive terminal connector and the negative terminal connector.

[0012] By adopting the above technical solution, since one end of the positive electrode crimping section is connected to the positive electrode charging terminal through the positive electrode terminal connector, the connection stability between the positive electrode charging terminal and the positive electrode cable is increased; since a first extension pipe connecting the positive electrode pipe connector and the positive electrode terminal connector is provided, the coolant can flow to a position close to the positive electrode charging terminal, thereby improving the cooling effect on the positive electrode charging terminal and further increasing the safety of the liquid-cooled charging gun when charging new energy electric vehicles.

[0013] Because one end of the negative electrode crimping section is connected to the negative electrode charging terminal via the negative electrode terminal connector, the connection stability between the negative electrode charging terminal and the negative electrode cable is increased. Because a second extension pipe is provided between the negative electrode pipe connector and the negative electrode terminal connector to connect the two, the coolant can flow to a position close to the negative electrode charging terminal, thereby improving the cooling effect on the negative electrode charging terminal and further increasing the safety of the liquid-cooled charging gun when charging new energy electric vehicles.

[0014] Optionally, a heat insulation layer is provided on the outside of the return pipeline, which is used to thermally isolate the return pipeline from the first pipeline and the second pipeline.

[0015] By adopting the above technical solution, since the return pipe is provided with a heat insulation layer, the heat insulation layer can insulate the return pipe from the first pipe and the second pipe, so as to avoid the situation where the temperature difference between the coolant inside the return pipe and the coolant in the first liquid inlet channel and the second liquid inlet channel affects the cooling effect on the positive and negative cables, thereby further improving the cooling effect on the liquid-cooled charging gun and further reducing the temperature of the liquid-cooled charging gun.

[0016] Optionally, a first helical blade is provided between the first pipeline and the positive electrode cable. The inner end of the first helical blade is connected to the positive electrode cable, and the outer end of the first helical blade is connected to the first pipeline, so that the first liquid inlet channel is provided in a helical extension configuration.

[0017] And / or, a second spiral blade is provided between the second pipeline and the negative electrode cable, the inner end of the second spiral blade is connected to the negative electrode cable, and the outer end of the second spiral blade is connected to the second pipeline, so that the second liquid inlet channel is spirally extended.

[0018] By adopting the above technical solution, since a first spiral blade is provided between the first pipeline and the positive cable, the first liquid inlet channel extends spirally along the circumference of the positive cable, thereby increasing the flow path of the coolant in the first liquid inlet channel, thus increasing the heat exchange time between the coolant and the positive cable, and further improving the cooling effect on the liquid-cooled charging gun.

[0019] Because a second spiral blade is provided between the second pipeline and the negative cable, the second liquid inlet channel extends spirally along the circumference of the negative cable, thereby increasing the flow path of the coolant in the second liquid inlet channel, which increases the heat exchange time between the coolant and the negative cable, and further improves the cooling effect on the liquid-cooled charging gun.

[0020] Optionally, the first pipeline and / or the second pipeline may be provided with an insulation layer.

[0021] By adopting the above technical solution, since the first pipeline and / or the second pipeline are provided with an insulation layer, the coolant in the first liquid inlet channel and / or the second liquid inlet channel can be insulated, thereby reducing the amount of heat transferred from the coolant in the first liquid inlet channel to the outside of the first pipeline. This allows the coolant to exchange more heat with the positive cable, thus improving the cooling effect on the positive cable. Furthermore, the amount of heat transferred from the coolant in the second liquid inlet channel to the outside of the second pipeline is reduced, allowing the coolant to exchange more heat with the negative cable, thus improving the cooling effect on the negative cable, and further improving the cooling effect on the liquid-cooled charging gun.

[0022] Optionally, the gun body also has an outer shell, which includes a housing and a blocking sleeve. One end of the housing has a passage for the charging cable to extend out, and an elastic sealing sleeve is provided at the passage for the charging cable. The blocking sleeve is provided on the outside of the housing and is used to block the elastic sealing sleeve.

[0023] By adopting the above technical solution, the elastic sealing sleeve fitted over the charging cable at the port increases the sealing between the charging cable and the port, thereby improving the waterproof performance of the liquid-cooled charging gun and further enhancing its safety. Furthermore, the barrier sleeve fitted over the outer shell and used to block the elastic sealing sleeve increases the stability of the elastic sealing sleeve, further ensuring the waterproof performance of the liquid-cooled charging gun.

[0024] Optionally, the blocking sleeve has a support ring inside, the support ring has a connecting protrusion on its periphery, the blocking sleeve has a connecting groove inside to accommodate the connecting protrusion, and the inner diameter of the support ring is smaller than the outer diameter of the elastic sealing sleeve.

[0025] By adopting the above technical solution, since the inner diameter of the support ring is smaller than the outer diameter of the elastic sealing sleeve, the support ring blocks the elastic sealing sleeve, thereby increasing the stability of the elastic sealing sleeve. At the same time, the structural design of the blocking sleeve is simplified, making it easier to manufacture the blocking sleeve. Furthermore, the support ring has a connecting protrusion on its periphery, and the blocking sleeve has a connecting groove inside to accommodate the connecting protrusion, thereby increasing the connection stability between the support ring and the blocking sleeve, and thus ensuring the sealing between the charging cable and the outer shell.

[0026] Optionally, the blocking sleeve includes an upper shell and a lower shell, the upper shell being provided with fasteners connected to the lower shell, so that the upper shell and the lower shell are pressed against the outer wall of the housing under the action of the fasteners.

[0027] By adopting the above technical solution, since the blocking sleeve includes an upper shell and a lower shell, and the upper shell is provided with fasteners connected to the lower shell, on the one hand, the assembly difficulty of the blocking sleeve is reduced, so as to facilitate the assembly of the liquid-cooled charging gun, and on the other hand, the connection stability between the blocking sleeve and the shell is increased.

[0028] Optionally, the upper shell is provided with a reinforcing ring, the reinforcing ring is located at the end of the lower shell, and the support ring passes through the reinforcing ring.

[0029] By adopting the above technical solution, since the support ring passes through the reinforcing ring, the reinforcing ring can limit the support ring. In turn, the reinforcing ring can counteract the relative movement between the support ring and the blocking sleeve caused by the pressure exerted on it by the charging cable, thereby increasing the stability of the support ring and the connection stability between the blocking sleeve and the outer shell.

[0030] Optionally, the housing is provided with a positioning groove, and the blocking sleeve is provided with a positioning protrusion extending into the positioning groove.

[0031] By adopting the above technical solution, since the housing is provided with a positioning groove and the blocking sleeve is provided with a positioning protrusion extending into the positioning groove, the cooperation between the positioning protrusion and the positioning groove can limit the blocking sleeve, thereby further increasing the connection stability between the blocking sleeve and the housing.

[0032] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0033] 1. The liquid-cooled charging gun of this application includes a gun body and a liquid-cooling pipeline. The gun body has a positive charging terminal, a negative charging terminal, a positive cable connected to the positive charging terminal, and a negative cable connected to the negative charging terminal. The liquid-cooling pipeline includes a first pipeline sleeved outside the positive cable, a second pipeline disposed outside the negative cable, a connecting pipeline, and a return pipeline connected to the connecting pipeline. A first liquid inlet channel is formed between the first pipeline and the positive cable, and a second liquid inlet channel is formed between the second pipeline and the negative cable. One end of the connecting pipeline is connected to the end of the first liquid inlet channel near the positive charging terminal, and the other end of the connecting pipeline is connected to the end of the second liquid inlet channel near the negative charging terminal, so that the coolant in the first liquid inlet channel and the second liquid inlet channel enters the return pipeline through the connecting pipeline and completes the return flow. Using the liquid-cooled charging gun of this application... During charging, the coolant delivery device in the charging cabinet is connected to the first and second inlet channels, and the return pipe is connected to the coolant storage container in the charging cabinet. When the liquid-cooled charging gun charges a new energy electric vehicle, the coolant delivery device in the charging cabinet delivers coolant to the first and second inlet channels, thereby cooling the positive and negative cables respectively. The coolant in the first and second inlet channels enters the return pipe through the connecting pipe, allowing the coolant to exchange heat and cool the positive and negative cables before returning to the charging cabinet via the return pipe. This effectively cools the liquid-cooled charging gun, significantly reducing its temperature and ensuring its charging efficiency while eliminating safety hazards.

[0034] 2. The return pipeline in this application is provided with a heat insulation layer on the outside. The heat insulation layer is used to thermally isolate the return pipeline from the first pipeline and the second pipeline, so as to avoid the situation where the cooling effect on the positive and negative cables is affected by the temperature difference between the coolant inside the return pipeline and the coolant in the first and second inlet channels, thereby further improving the cooling effect on the liquid-cooled charging gun and further reducing the temperature of the liquid-cooled charging gun.

[0035] 3. The first and / or second pipes in this application are provided with an insulation layer, which can insulate the coolant in the first and / or second inlet channels, thereby reducing the amount of heat transferred from the coolant in the first inlet channel to the outside of the first pipe. This allows the coolant to exchange more heat with the positive cable, thus improving the cooling effect on the positive cable. Furthermore, it reduces the amount of heat transferred from the coolant in the second inlet channel to the outside of the second pipe, allowing the coolant to exchange more heat with the negative cable, thus improving the cooling effect on the negative cable, and further improving the cooling effect on the liquid-cooled charging gun. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0037] Figure 1 This is a schematic diagram of the structure of the liquid-cooled charging gun according to one embodiment of this application;

[0038] Figure 2 This is a cross-sectional view of the liquid-cooled charging gun according to one embodiment of this application, showing only a portion of the structure;

[0039] Figure 3 This is a schematic diagram of the liquid cooling pipeline according to one embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the explosion structure of the blocking sleeve according to one embodiment of this application.

[0041] Figure label:

[0042] 1. Gun body; 11. Positive charging terminal; 12. Negative charging terminal; 13. Positive crimp section; 131. Positive terminal connector; 132. Positive pipeline connector; 133. First extension pipeline; 14. Negative crimp section; 141. Negative terminal connector; 142. Negative pipeline connector; 143. Second extension pipeline; 15. Housing; 151. Positioning groove; 16. Blocking sleeve; 161. Support ring; 162. Connecting protrusion; 163. Connecting groove; 164. Upper shell; 165. Lower shell; 166. Reinforcing ring; 167. Positioning protrusion; 17. Elastic sealing sleeve; 2. Liquid cooling pipeline; 21. First pipeline; 22. Second pipeline; 23. Connecting pipeline; 24. Return pipeline. Detailed Implementation

[0043] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0045] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0048] Reference Figures 1 to 4 A liquid-cooled charging gun is disclosed, comprising a gun body 1 and a liquid-cooling pipeline 2. The gun body 1 has a positive charging terminal 11, a negative charging terminal 12, a positive cable connected to the positive charging terminal 11, and a negative cable connected to the negative charging terminal 12. The liquid-cooling pipeline 2 includes a first pipeline 21 sleeved outside the positive cable, a second pipeline 22 disposed outside the negative cable, a connecting pipeline 23, and a return pipeline 24 connected to the connecting pipeline 23. A first liquid inlet channel is formed between the first pipeline 21 and the positive cable, and a second liquid inlet channel is formed between the second pipeline 22 and the negative cable. One end of the connecting pipeline 23 is connected to the end of the first liquid inlet channel near the positive charging terminal 11, and the other end of the connecting pipeline 23 is connected to the end of the second liquid inlet channel near the negative charging terminal 12, so that the coolant in the first liquid inlet channel and the second liquid inlet channel enters the return pipeline 24 through the connecting pipeline 23 and completes the return flow.

[0049] When using the liquid-cooled charging gun of this application, the device for supplying coolant in the charging cabinet is connected to the first and second inlet channels, and the return pipe 24 is connected to the container for storing coolant in the charging cabinet. When the liquid-cooled charging gun charges a new energy electric vehicle, the device for supplying coolant in the charging cabinet supplies coolant to the first and second inlet channels, thereby cooling the positive and negative cables respectively. The coolant in the first and second inlet channels enters the return pipe 24 through the connecting pipe 23, so that the coolant exchanges heat with and cools the positive and negative cables before returning to the charging cabinet via the return pipe 24. This achieves cooling of the liquid-cooled charging gun, greatly reducing its temperature, thereby ensuring the charging efficiency of the liquid-cooled charging gun and eliminating safety hazards.

[0050] Furthermore, since the first liquid inlet channel and the second liquid inlet channel are connected by the connecting pipe 23, when the pumping equipment corresponding to the first liquid inlet channel and the second liquid inlet channel in the charging cabinet malfunctions, the coolant can enter the liquid inlet channel corresponding to the malfunctioning pumping equipment through the connecting pipe 23, so as to ensure the cooling efficiency of the liquid-cooled charging gun and thus ensure the safety of the liquid-cooled charging gun.

[0051] In addition, the improved cooling efficiency of the liquid-cooled charging gun also reduces the diameter of the positive and negative cables, thus improving the convenience for users when charging the liquid-cooled charging gun; at the same time, it simplifies the structure of the liquid-cooled charging gun and reduces its production cost.

[0052] In a preferred embodiment, refer to Figure 2 and Figure 3 The positive cable has a positive crimp section 13. One end of the positive crimp section 13 is connected to the positive charging terminal 11 through a positive terminal connector 131. The other end of the positive crimp section 13 is provided with a positive tube connector 132. The positive tube connector 132 and the positive terminal connector 131 are hollow inside. A first extension tube 133 connecting the positive tube connector 132 and the positive terminal connector 131 is provided between them. The first tube 21 is connected to the positive tube connector 132.

[0053] Since one end of the positive electrode crimping section 13 is connected to the positive electrode charging terminal 11 through the positive electrode terminal connector 131, the connection stability between the positive electrode charging terminal 11 and the positive electrode cable is increased. Since a first extension pipe 133 connecting the positive electrode pipe connector 132 and the positive electrode terminal connector 131 is provided, the coolant can flow to a position close to the positive electrode charging terminal 11, thereby improving the cooling effect on the positive electrode charging terminal 11 and further increasing the safety of the liquid-cooled charging gun when charging new energy electric vehicles.

[0054] In a preferred embodiment, refer to Figure 3 The negative cable has a negative crimp section 14. One end of the negative crimp section 14 is connected to the negative charging terminal 12 through a negative terminal connector 141. The other end of the negative crimp section 14 is provided with a negative tube connector 142. The negative tube connector 142 and the negative terminal connector 141 are hollow inside. A second extension tube 143 connecting the negative tube connector 142 and the negative terminal connector 141 is provided between them. The second tube 22 is connected to the negative tube connector 142. The two ends of the connecting tube 23 are respectively connected to the positive terminal connector 131 and the negative terminal connector 141.

[0055] Since one end of the negative electrode crimping section 14 is connected to the negative electrode charging terminal 12 through the negative electrode terminal connector 141, the connection stability between the negative electrode charging terminal 12 and the negative electrode cable is increased. Since a second extension pipe 143 connecting the negative electrode pipe connector 142 and the negative electrode terminal connector 141 is provided, the coolant can flow to a position close to the negative electrode charging terminal 12, thereby improving the cooling effect on the negative electrode charging terminal 12 and further increasing the safety of the liquid-cooled charging gun when charging new energy electric vehicles.

[0056] In a preferred embodiment, a heat insulation layer is provided on the outside of the return pipe 24. The heat insulation layer is used to thermally isolate the return pipe 24 from the first pipe 21 and the second pipe 22, so as to avoid the situation where the cooling effect on the positive and negative cables is affected by the temperature difference between the coolant inside the return pipe 24 and the coolant in the first and second inlet channels, thereby further improving the cooling effect on the liquid-cooled charging gun and further reducing the temperature of the liquid-cooled charging gun.

[0057] This application does not specifically limit the formation method of the insulation layer. Preferably, the insulation layer is formed of rock wool that is sleeved on the outside of the return pipe 24, so as to improve the insulation effect between the return pipe 24 and the first pipe 21 and the second pipe 22, and at the same time improve the antifreeze effect of the return pipe 24. In other embodiments, the insulation layer may also be formed of aerogel felt that is sleeved on the outside of the return pipe 24.

[0058] In a preferred embodiment, an insulation layer is provided on the outside of the first pipe 21 and / or the second pipe 22, thereby insulating the coolant in the first liquid inlet channel and / or the second liquid inlet channel. This reduces the amount of heat transferred from the coolant in the first liquid inlet channel to the outside of the first pipe 21, allowing the coolant to exchange more heat with the positive cable, thus improving the cooling effect on the positive cable. Furthermore, the amount of heat transferred from the coolant in the second liquid inlet channel to the outside of the second pipe 22 is reduced, allowing the coolant to exchange more heat with the negative cable, thus improving the cooling effect on the negative cable, and further improving the cooling effect on the liquid-cooled charging gun.

[0059] Preferably, both the first pipe 21 and the second pipe 22 are provided with an insulation layer to improve the cooling effect on the liquid-cooled charging gun.

[0060] This application does not specifically limit the formation method of the insulation layer. Preferably, the insulation layer is formed by insulation cotton sleeved on the outside of the first pipe 21 and the second pipe 22 to improve the insulation effect of the coolant in the first liquid inlet channel and the second liquid inlet channel. In other embodiments, the insulation layer may also be formed by polyurethane foam adhered to the outside of the first pipe 21 and the second pipe 22.

[0061] In a preferred embodiment, a first helical blade is provided between the first pipe 21 and the positive cable. The inner end of the first helical blade is connected to the positive cable, and the outer end of the first helical blade is connected to the first pipe 21, so that the first liquid inlet channel is spirally extended to increase the flow path of the coolant in the first liquid inlet channel, thereby increasing the heat exchange time between the coolant and the positive cable, and further improving the cooling effect on the liquid-cooled charging gun. At the same time, the first helical blade can also support the first pipe 21 and the positive cable to increase the connection stability of the first pipe 21 and the positive cable.

[0062] In a preferred embodiment, a second helical blade is provided between the second pipe 22 and the negative cable. The inner end of the second helical blade is connected to the negative cable, and the outer end of the second helical blade is connected to the second pipe 22, so that the second liquid inlet channel is spirally extended to increase the flow path of the coolant in the second liquid inlet channel, thereby increasing the heat exchange time between the coolant and the negative cable, and further improving the cooling effect on the liquid-cooled charging gun. At the same time, the second helical blade can also support the second pipe 22 and the negative cable to increase the connection stability of the second pipe 22 and the negative cable.

[0063] In a preferred embodiment, refer to Figure 1 , Figure 2 and Figure 4The gun body 1 also has an outer shell, which includes a housing 15 and a blocking sleeve 16. One end of the housing 15 has a passage for the charging cable to extend out. An elastic sealing sleeve 17 is provided at the passage and is fitted onto the outside of the charging cable. The blocking sleeve 16 is fitted onto the outside of the housing and is used to block the elastic sealing sleeve 17.

[0064] It should be noted that the charging cable includes a positive cable, a first conduit 21, a negative cable, a second conduit 22, a return conduit 24, and a sheath covering the outside of the above five components.

[0065] Because an elastic sealing sleeve 17 is provided at the port and sleeved on the outside of the charging cable, the sealing between the charging cable and the port is increased, thereby improving the waterproof performance of the liquid-cooled charging gun and further increasing the safety of the liquid-cooled charging gun; and the blocking sleeve 16 is provided on the outside of the housing and is used to block the elastic sealing sleeve 17, thereby increasing the stability of the elastic sealing sleeve 17 and further ensuring the waterproof performance of the liquid-cooled charging gun.

[0066] This application does not specifically limit the structure of the blocking sleeve 16; preferably, refer to... Figure 2 and Figure 4 The blocking sleeve 16 has a support ring 161 inside, and the support ring 161 has a connecting protrusion 162 on its periphery. The blocking sleeve 16 has a connecting groove 163 inside to accommodate the connecting protrusion 162. The inner diameter of the support ring 161 is smaller than the outer diameter of the elastic sealing sleeve 17, thereby blocking the elastic sealing sleeve 17 and increasing the stability of the elastic sealing sleeve 17. At the same time, it simplifies the structural design of the blocking sleeve 16, so as to facilitate the production of the blocking sleeve 16. Furthermore, the support ring 161 has a connecting protrusion 162 on its periphery, and the blocking sleeve 16 has a connecting groove 163 inside to accommodate the connecting protrusion 162, thereby increasing the connection stability between the support ring 161 and the blocking sleeve 16, and thus ensuring the sealing between the charging cable and the housing 15.

[0067] The better one is to refer to Figure 2 and Figure 4 The connecting protrusion 162 extends continuously along the circumference of the support ring 161, and the connecting groove 163 is adapted to the connecting protrusion 162 to increase the connection area between the support ring 161 and the blocking sleeve 16, thereby further increasing the stability of the support ring 161.

[0068] Furthermore, refer to Figure 2 and Figure 4The blocking sleeve 16 includes an upper shell 164 and a lower shell 165. The upper shell 164 is provided with fasteners connected to the lower shell 165, so that the upper shell 164 and the lower shell 165 are pressed against the outer wall of the housing 15 under the action of the fasteners. On the one hand, it reduces the assembly difficulty of the blocking sleeve 16, so as to facilitate the assembly of the liquid-cooled charging gun. On the other hand, it increases the connection stability between the blocking sleeve 16 and the housing 15.

[0069] This application does not specifically limit the structure of the fastener. Preferably, the fastener is a screw to reduce the assembly difficulty of the blocking sleeve 16 and improve the assembly efficiency of the liquid-cooled charging gun. In other embodiments, the fastener may also be a snap-fit ​​post that can engage with the lower shell 165 or other structures that can fix the upper shell 164 and the lower shell 165.

[0070] Furthermore, refer to Figure 2 and Figure 4 The upper shell 164 is provided with a reinforcing ring 166, which is located at the end of the lower shell 165. The support ring 161 passes through the reinforcing ring 166, thereby enabling the reinforcing ring 166 to limit the support ring 161. The reinforcing ring 166 also counteracts the relative movement between the support ring 161 and the blocking sleeve 16 caused by the pressure exerted on it by the charging cable, thereby increasing the stability of the support ring 161 and the connection stability between the blocking sleeve 16 and the shell 15.

[0071] Furthermore, refer to Figure 2 and Figure 4 The housing 15 is provided with a positioning groove 151, and the blocking sleeve 16 is provided with a positioning protrusion 167 extending into the positioning groove 151. The cooperation between the positioning protrusion 167 and the positioning groove 151 can limit the blocking sleeve 16, thereby further increasing the connection stability between the blocking sleeve 16 and the housing 15.

[0072] Preferably, the positioning protrusion 167 extends continuously along the circumference of the blocking sleeve 16, and the positioning groove 151 is adapted to the positioning protrusion 167 to further increase the connection stability between the blocking sleeve 16 and the housing 15.

[0073] In other embodiments, the blocking sleeve 16 may also be an integral structure with an annular cross-section, and an annular rib is provided at the end of the blocking sleeve 16 away from the housing 15. The annular rib can cooperate with the elastic sealing sleeve 17 to stop, and the blocking sleeve 16 is threaded to the housing 15 to reduce the assembly difficulty of the blocking sleeve 16. After the blocking sleeve 16 is threaded to the housing 15, it can also be fixed with screws.

[0074] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0075] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0076] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A liquid-cooled charging gun, characterized in that, The device includes a gun body (1) and a liquid cooling pipeline (2). The gun body (1) has a positive charging terminal (11), a negative charging terminal (12), a positive cable connected to the positive charging terminal (11), and a negative cable connected to the negative charging terminal (12). The liquid cooling pipeline (2) includes a first pipeline (21) sleeved outside the positive cable, a second pipeline (22) disposed outside the negative cable, a connecting pipeline (23), and a return pipeline (24) connected to the connecting pipeline (23). The first pipeline (21) A first liquid inlet channel is formed between the positive electrode cable and the second pipe (22), and a second liquid inlet channel is formed between the negative electrode cable. One end of the connecting pipe (23) is connected to the end of the first liquid inlet channel near the positive electrode charging terminal (11), and the other end of the connecting pipe (23) is connected to the end of the second liquid inlet channel near the negative electrode charging terminal (12), so that the coolant in the first liquid inlet channel and the second liquid inlet channel enters the return pipe (24) through the connecting pipe (23) and completes the return flow.

2. The liquid-cooled charging gun according to claim 1, characterized in that, The positive cable has a positive crimp section (13), one end of which is connected to the positive charging terminal (11) via a positive terminal connector (131). The other end of the positive crimp section (13) is provided with a positive pipeline connector (132). The positive pipeline connector (132) and the positive terminal connector (131) are hollow inside. A first extension pipeline (133) connecting the positive pipeline connector (132) and the positive terminal connector (131) is provided between them. The first pipeline (21) is connected to the positive pipeline connector (132). The negative cable has a negative crimp section (14), one end of which is connected to the negative charging terminal (12) via a negative terminal connector (141). The other end of the negative crimp section (14) is provided with a negative pipeline connector (142). The negative pipeline connector (142) and the negative terminal connector (141) are hollow inside. A second extension pipeline (143) connecting the two is provided between the negative pipeline connector (142) and the negative terminal connector (141). The second pipeline (22) is connected to the negative pipeline connector (142). The two ends of the connecting pipeline (23) are respectively connected to the positive terminal connector (131) and the negative terminal connector (141).

3. A liquid-cooled charging gun according to claim 1, characterized in that, The return pipe (24) is provided with a heat insulation layer on the outside, which is used to thermally isolate the return pipe (24) from the first pipe (21) and the second pipe (22).

4. A liquid-cooled charging gun according to claim 1, characterized in that, A first spiral blade is provided between the first pipeline (21) and the positive electrode cable. The inner end of the first spiral blade is connected to the positive electrode cable, and the outer end of the first spiral blade is connected to the first pipeline (21), so that the first liquid inlet channel is spirally extended. And / or, a second spiral blade is provided between the second pipeline (22) and the negative electrode cable, the inner end of the second spiral blade is connected to the negative electrode cable, and the outer end of the second spiral blade is connected to the second pipeline (22), so that the second liquid inlet channel is spirally extended.

5. A liquid-cooled charging gun according to claim 1, characterized in that, The first pipe (21) and / or the second pipe (22) are provided with an insulation layer on the outside.

6. A liquid-cooled charging gun according to any one of claims 1-5, characterized in that, The gun body (1) also has an outer shell, which includes a housing (15) and a blocking sleeve (16). One end of the housing (15) has a passage for the charging cable to extend out. An elastic sealing sleeve (17) is provided at the passage and is fitted onto the outside of the charging cable. The blocking sleeve (16) is fitted onto the outside of the housing (15) and is used to block the elastic sealing sleeve (17).

7. A liquid-cooled charging gun according to claim 6, characterized in that, The blocking sleeve (16) has a support ring (161) inside, and the support ring (161) has a connecting protrusion (162) on its periphery. The blocking sleeve (16) has a connecting groove (163) inside to accommodate the connecting protrusion (162). The inner diameter of the support ring (161) is smaller than the outer diameter of the elastic sealing sleeve (17).

8. A liquid-cooled charging gun according to claim 7, characterized in that, The blocking sleeve (16) includes an upper shell (164) and a lower shell (165). The upper shell (164) is provided with a fastener connected to the lower shell (165) so that the upper shell (164) and the lower shell (165) are pressed against the outer wall of the housing (15) by the action of the fastener.

9. A liquid-cooled charging gun according to claim 8, characterized in that, The upper shell (164) is provided with a reinforcing ring (166), the reinforcing ring (166) is located at the end of the lower shell (165), and the support ring (161) passes through the reinforcing ring (166).

10. A liquid-cooled charging gun according to claim 8, characterized in that, The housing (15) is provided with a positioning groove (151), and the blocking sleeve (16) is provided with a positioning protrusion (167) extending into the positioning groove (151).

Images