Charging gun and charging device

Abstract

The application provides a charging gun and a charging device, and belongs to the technical field of charging. The charging gun comprises a gun head, a protective shell, at least two power terminals and at least two connecting lines. The gun head is fixed to one end of the protective shell, the gun head has a terminal cavity, a part of each connecting line passes through the protective shell and extends into the gun head, and each connecting line comprises a liquid cooling pipe and a bare power line. By arranging a sealing element in the gun head and making the sealing element contact the inner wall surface of the terminal cavity to block the terminal cavity, when cooling liquid leaks at the connecting position of the connecting line and the power terminal, the leakage of the cooling liquid from the terminal cavity can be effectively prevented, and the overall sealing performance and use safety of the charging gun are significantly improved. Compared with the glue filling sealing structure used in the related art, the embodiment of the application does not need to design a special mold and perform a complex glue filling process, so that the operation process is simplified and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of charging technology, and more particularly to a charging gun and a charging device. Background Technology

[0002] With the increasing popularity of electric vehicles, charging equipment, as a supporting facility, has also developed rapidly. Charging equipment typically includes a charging gun, used to connect to and charge electric vehicles. To cope with the high heat generated during high-power fast charging, immersion cooling technology is increasingly being applied to charging equipment. This technology involves installing liquid cooling pipes on the outside of the positive and negative leads of the charging gun. These liquid cooling pipes not only serve as insulating protective layers for the leads but also act as sealed cavities filled with coolant, allowing the leads to be in direct contact with the coolant. The coolant circulates and carries away heat, effectively cooling the leads.

[0003] However, due to the complex structure and vibration, sealing the interface of the liquid cooling pipe inside the charging gun is difficult and prone to leaks. This can lead to coolant leakage, causing short circuits between the positive and negative charging cables and other safety hazards. Therefore, related technologies typically employ potting compound sealing processes to enhance the sealing effect.

[0004] While the solution using related technologies can effectively prevent leakage through glue sealing, the process requires redesigning the mold for glue solidification, increasing operational complexity and manufacturing costs. Utility Model Content

[0005] This application provides a charging gun and a charging device that can reduce the complexity of the sealing operation of the charging gun and reduce the production cost of the charging gun.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, this application provides a charging gun, including a gun head, a protective shell, at least two power terminals, and at least two connecting wires; the gun head is fixed to one end of the protective shell, the gun head has a terminal cavity, at least two power terminals are located in the terminal cavity, the end of the gun head away from the protective shell has at least two openings, the at least two openings communicate with the terminal cavity, and one opening exposes one power terminal; a portion of each connecting wire passes through the protective shell and extends into the gun head, each connecting wire includes a liquid cooling tube and a bare power wire, the liquid cooling tube is used to supply coolant flow, and the bare power wire is located inside the liquid cooling tube; one liquid cooling tube is sleeved on the outside of one power terminal, and the bare power wire inside the liquid cooling tube is connected to one power terminal; the charging gun also includes a sealing element, the sealing element has at least two first through holes, one of the first through holes is used for one liquid cooling tube to pass through; the connection between the liquid cooling tube and the power terminal is located on the side of the sealing element away from the protective shell, the sealing element is fixed inside the gun head, and the sealing element contacts the inner wall surface of the terminal cavity and is used to seal the terminal cavity.

[0008] When using the charging gun, the gun head is plugged into the socket of the device to be charged (such as an electric vehicle), so that the terminals of the gun head are electrically connected to the vehicle's docking terminals, thereby completing the power transmission. By setting a seal inside the gun head and having it contact the inner wall of the terminal cavity to seal the terminal cavity, coolant leakage from the terminal cavity can be effectively prevented when coolant leaks at the connection between the connecting wire and the power terminal, significantly improving the overall sealing performance and safety of the charging gun. Compared with the potting sealing structure used in related technologies, the embodiments of this application do not require the design of special molds and the execution of complex potting processes, simplifying the operation procedures and reducing production costs.

[0009] In one embodiment, the charging gun further includes at least two fasteners, one of which is sleeved around a liquid cooling tube and a power terminal, and the fastener is resilient and used to clamp the liquid cooling tube and the power terminal.

[0010] By incorporating at least two fasteners within the charging gun, each fitting over the corresponding liquid cooling pipe and power terminal, and utilizing their elasticity to clamp and secure both, the connection stability between the liquid cooling pipe and power terminal is enhanced, further improving the sealing performance of this connection. During charging, especially under conditions of vibration or temperature fluctuations, the fasteners effectively prevent loosening or misalignment between the liquid cooling pipe and power terminal, thereby reducing the risk of coolant leakage and preventing electrical faults or safety accidents caused by unstable connections. Furthermore, this fastening structure is easy to install, requiring no complex assembly processes, which helps improve production efficiency.

[0011] In one embodiment, both the seal and the fastener are located within the terminal cavity, with the seal positioned between the fastener and the protective housing.

[0012] By placing both the seals and fasteners inside the terminal cavity, the internal space of the terminal cavity is made efficient, reducing the number of external structures and thus improving the overall compactness of the charging gun. This also simplifies the design of the external terminal cavity structure. Furthermore, the seals are positioned between the fasteners and the protective shell, allowing the fasteners to prioritize the connection and fixation of the liquid cooling pipes and power terminals, while the seals further prevent coolant leakage to the outside of the terminal cavity.

[0013] In one embodiment, the charging gun further includes a cover plate fixed to the gun head, the cover plate being located on the side of the seal facing the protective shell, and the cover plate covering the opening.

[0014] The cover plate not only protects the seals from damage during assembly or use, but also further enhances the sealing effect of the terminal cavity, preventing coolant leakage or intrusion of external impurities, thereby improving the overall sealing performance and safety of the charging gun.

[0015] In one embodiment, one of the sidewalls of the terminal cavity and the cover plate has one or more locking blocks, and the other has one or more locking slots, with one locking block engaging with one locking slot.

[0016] By embedding the locking block into the slot to achieve a mating connection, displacement of the cover plate during use can be effectively prevented, thereby improving the stability of the connection between the cover plate and the side wall of the terminal cavity. At the same time, since there is a clear mating relationship between the locking block and the slot, it can play a positioning and guiding role during assembly, which helps to achieve accurate alignment and installation of the cover plate, avoid misalignment, and improve assembly efficiency.

[0017] In one embodiment, at least two power terminals include a positive terminal and a negative terminal; the nozzle includes a partition fixed within the terminal cavity and dividing the terminal cavity into a first cavity and a second cavity, at least a portion of the positive terminal is located within the first cavity, and at least a portion of the negative terminal is located within the second cavity; the seal includes a first sub-part and a second sub-part, the first sub-part contacting the inner wall surface of the first cavity and used to seal the first cavity, and the second sub-part contacting the inner wall surface of the second cavity and used to seal the second cavity, each of the first sub-part and the second sub-part having one or more first through holes; at least two connecting wires include a positive connecting wire and a negative connecting wire, the liquid cooling tube of the positive connecting wire passes through a first through hole on the first sub-part and is sleeved outside the positive terminal, the bare power wire in the positive connecting wire is electrically connected to the positive terminal; the liquid cooling tube of the negative connecting wire passes through a first through hole on the second sub-part and is sleeved outside the negative terminal, the bare power wire in the negative connecting wire is electrically connected to the negative terminal.

[0018] By dividing the terminal cavity into two independent chambers, a first chamber and a second chamber, each housing the positive and negative terminals respectively, physical spatial isolation between the positive and negative terminals (the electrical connection points) is achieved. This effectively prevents safety hazards such as short circuits caused by coolant leakage between the positive and negative terminals, improving the overall safety of the charging gun. Simultaneously, the sealing element adopts a split structure comprising a first sub-section and a second sub-section, independently sealing the first and second chambers. This not only improves sealing reliability but also facilitates assembly and maintenance. Each sub-section of the sealing element has a first through hole for the connecting wires, allowing the positive and negative connecting wires to pass through their respective sealing sub-sections and connect to the positive and negative terminals, further enhancing the electrical isolation and sealing performance between the chambers.

[0019] In one embodiment, the charging gun further includes at least two flow tubes, each power terminal having a channel, and one flow tube communicating with a liquid cooling pipe of a connecting wire through the channel of one power terminal; the seal further includes at least two second through holes, with one flow tube passing through one second through hole.

[0020] By setting a channel in the power terminal and connecting the flow pipe and the liquid cooling pipe in the connecting wire, the coolant can circulate between the power terminal and the connecting wire, effectively removing the heat generated during charging and significantly improving the heat dissipation efficiency of the charging gun.

[0021] In one embodiment, the charging gun further includes a temperature sensor fixed inside the terminal cavity and in contact with the sidewall of the power terminal.

[0022] By installing a temperature sensor inside the terminal cavity that is in direct contact with the side wall of the power terminal, the temperature change of the power terminal during operation can be monitored in real time and accurately, thereby providing feedback on the operating status of the cooling components and realizing cooling control of the power terminal.

[0023] In one embodiment, a leakage detector is provided at the bottom of the terminal cavity. The leakage detector has conductive contacts, and an alarm signal is triggered when coolant comes into contact with the conductive contacts.

[0024] By installing a leak detector with conductive contacts at the bottom of the terminal cavity, when coolant leaks and accumulates at the detection location due to seal failure, the conductive properties of the coolant trigger the conductive contacts, thereby generating an alarm signal. This allows for timely detection of even minor leaks, preventing coolant from spreading to electrical connection areas and causing short circuits or other safety hazards, significantly improving the safety of the charging gun under liquid-cooled conditions.

[0025] Secondly, this application provides a charging device, including a power conversion device, a cooling assembly, and a charging gun of any of the above; the power conversion device is electrically connected to the bare power line of each connection line, the power conversion device is used to output electrical energy to the charging gun, and the cooling assembly is used to cool the coolant and drive the coolant to flow in the liquid cooling pipe.

[0026] The power conversion device converts AC power from the external power grid into stable DC power, which is then delivered to the electric vehicle via a charging gun to charge it. The cooling assembly may include a circulation pump and a condenser. The circulation pump drives the coolant to flow through the liquid cooling pipes in the connecting wires, and the condenser cools the coolant by exchanging heat with it. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a charging device provided in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of another charging device provided in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the structure of a charging gun provided in an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the structure of a gun head provided in an embodiment of this application;

[0031] Figure 5 This is a partial structural diagram of a charging gun provided in an embodiment of this application;

[0032] Figure 6 This is a partial structural schematic diagram of another charging gun provided in an embodiment of this application;

[0033] Figure 7 This is a partial structural cross-sectional view of a charging gun provided in an embodiment of this application;

[0034] Figure 8 This is a partial structural cross-sectional view of another charging gun provided in an embodiment of this application;

[0035] Figure 9 This is an exploded view of a portion of the structure of a charging gun provided in an embodiment of this application;

[0036] Figure 10 This is a schematic diagram of the structure of a sealing element provided in an embodiment of this application;

[0037] Figure 11 This is a partial structural cross-sectional view of another charging gun provided in the embodiments of this application.

[0038] Figure label:

[0039] 010-Charging equipment; 001-Charging pile; 30-Power grid; 20-Electric vehicle; 111-Charging host; 112-Charging terminal; 000-Charging gun;

[0040] 100 - Gun head; 200 - Protective shell; 300 - Power terminal; C - Terminal cavity; K - Opening; 400 - Connecting wire; 401 - Liquid cooling pipe;

[0041] 402 - Bare power wire; 500 - Seal; B1 - First through hole; 600 - Fastener; 700 - Cover plate; P - Locking block; Q - Locking slot;

[0042] 031 - Equipment cabinet; 300A - Positive terminal; 300B - Negative terminal; 101 - Partition; C1 - First cavity; C2 - Second cavity;

[0043] 501 - First sub-section; 502 - Second sub-section; 400A - Positive connection wire; 400B - Negative connection wire; 800 - Flow tube; L - Channel;

[0044] B2 - Second through hole; 00 - Cooling assembly; 01 - Circulation pump; 02 - Condenser; 900 - Temperature sensor. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them.

[0046] In this application, the terms "first," "second," etc., are used only to distinguish different technical features or components, and do not indicate any priority or importance among these features, nor do they imply the number of technical features involved. Therefore, technical features described with "first," "second," etc., should be understood to include one or more.

[0047] In this application, unless otherwise expressly stated and limited, "multiple" means two or more.

[0048] Furthermore, in this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0049] In the accompanying drawings of the embodiments of this application, in order to clearly express different structural elements, solid structures such as parts and components are represented by guide lines, openings and holes are represented by broken lines, and hollow structures such as spaces and cavities are identified by guide lines with arrows.

[0050] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a charging device provided in an embodiment of this application. Figure 2 This is a schematic diagram of another charging device provided in an embodiment of this application. In some embodiments, the charging device 010 is a charging pile. The charging device 010 is used to receive AC power output from the external power grid 30, convert it into stable DC power, and then supply it to the electric vehicle 20 to charge the electric vehicle 20.

[0051] In some embodiments, such as Figure 1As shown, the charging device 010 is a split-type charging pile. Specifically, the charging pile 001 includes a charging host 111, at least one charging terminal 112, and at least one charging gun 000. The charging host 111 is electrically connected to each charging terminal 112, and each charging terminal 112 is electrically connected to one or more charging guns 000. The charging host 111 includes a power conversion device 33, which is installed inside the host cabinet of the charging host 111. This power conversion device 33 is used to convert AC power from the external power grid 30 into stable DC power before supplying it to the charging terminal 112. The charging terminal 112 can supply the stable DC power output by the power conversion device 33 to the electric vehicle 20 for charging. For example, the power conversion device 33 includes an AC-DC converter; or, for another example, the power conversion device 33 includes an AC-DC converter and a DC-DC converter, wherein the output of the AC-DC converter is electrically connected to the input of the DC-DC converter.

[0052] In some embodiments, the charging terminal 112 further includes a housing, a human-machine interface, a charging control unit, and a metering and billing unit, etc., for information interaction, energy transmission, and metering and billing functions with the electric vehicle 20.

[0053] In other embodiments, such as Figure 2 As shown, the charging device 010 is an integrated charging pile. The charging device 010 includes an equipment cabinet 031, a power conversion device 33, and at least one charging gun 000. The power conversion device 33 is located inside the equipment cabinet 031 and can convert AC power from the external power grid 30 into stable DC power. Each charging gun 000 is electrically connected to the power conversion device 33 inside the equipment cabinet 031, thereby transmitting the converted DC power to the electric vehicle 20 through the charging gun 000 to realize the charging operation of the electric vehicle 20.

[0054] This application embodiment also provides a charging gun 000 used in the charging device 010 described above. For example, the charging gun 000 can be a direct current (DC) charging gun or an alternating current (AC) charging gun.

[0055] To see the structure of the charging gun 000 more clearly, please refer to... Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of a charging gun provided in an embodiment of this application. Figure 4This is a schematic diagram of the structure of a charging gun head provided in an embodiment of this application. The charging gun 000 may include a charging gun head 100 and a protective shell 200, with the charging gun head 100 fixed to one end of the protective shell 200.

[0056] Figure 5 This is a partial structural schematic diagram of a charging gun provided in an embodiment of this application. For example... Figure 5 As shown, the charging gun 000 may further include at least two power terminals 300; the gun head 100 in the charging gun 000 may have a terminal cavity C, and at least two power terminals 300 are located in the terminal cavity C. The end of the gun head 100 away from the protective shell 200 has at least two openings K, which can communicate with the terminal cavity C, and one opening K exposes one power terminal 300.

[0057] In this way, at least two power terminals 300 in the charging gun 000 can establish an electrical connection with the corresponding interface (e.g., the terminal in the charging socket) on the electric vehicle 20 through the opening K, thereby realizing the charging of the electric vehicle 20.

[0058] In some embodiments, the charging gun 000 further includes a plurality of signal terminals (not shown) fixed within the terminal cavity C, including connection confirmation terminals (such as CC terminals, CP terminals, etc.). These signal terminals are used to enable communication between the charging gun 000 and the electric vehicle 20 to ensure the safety and reliability of the charging process.

[0059] Figure 6 This is a partial structural schematic diagram of another charging gun provided in an embodiment of this application. For example... Figure 6 As shown, the charging gun 000 may further include a cable, a portion of which passes through the protective housing 200 and extends into the gun head 100, while the other portion of the cable is located outside the protective housing. The cable includes a protective layer (not shown) and at least two connecting wires 400. The protective layer covers all connecting wires 400, providing protection for them. Furthermore, in some embodiments, the cable also includes a grounding wire (for grounding), a signal wire (for connecting signal terminals), etc., all encased within the protective layer; this application does not impose specific limitations on these aspects.

[0060] like Figure 6 As shown, a portion of each connecting wire 400 can pass through the protective housing 200 and extend into the gun head 100, and the portion of a connecting wire 400 extending into the gun head 100 is connected to a corresponding power terminal 300.

[0061] During charging, the passage of high-voltage current generates a significant amount of heat in at least two power terminals 300 and their connecting wires 400 within the charging gun 000, causing the temperature to rise. Excessive temperature not only reduces charging efficiency but may also threaten the safe operation of the charging facility.

[0062] To solve this problem, the cable in this application can adopt a liquid-cooled cable structure. Specifically, combined with Figure 6 , Figure 7 and Figure 8 , Figure 7 This is a partial structural cross-sectional view of a charging gun provided in an embodiment of this application. Figure 8 This is a partial cross-sectional view of another charging gun provided in an embodiment of this application. Each connecting wire 400 may include a liquid cooling pipe 401 and a bare power wire 402. The liquid cooling pipe 401 is used to supply coolant flow, and the bare power wire 402 is located inside the liquid cooling pipe 401 and is completely immersed in the coolant. One liquid cooling pipe 401 is sleeved around one power terminal 300, and the bare power wire 402 inside the liquid cooling pipe 401 is connected to one power terminal 300. The liquid cooling pipe 401 is used to supply coolant flow, thereby removing the heat generated during operation; the bare power wire 402 is used to transmit electrical energy, ensuring normal energy delivery while dissipating heat. For example, the bare power wire 402 and the power terminal 300 can be connected by welding, crimping, or conductive adhesive.

[0063] It should be noted that bare power wire 402 refers to a conductive metal wire without an independent insulating sheath. Since bare power wire 402 is completely immersed in coolant, heat can be directly transferred from the conductor surface to the coolant, thereby significantly improving heat dissipation efficiency.

[0064] Figure 9 This is an exploded view of a portion of the structure of a charging gun provided in an embodiment of this application. For example... Figure 9 As shown, the charging gun 000 may further include a seal 500, which has at least two first through holes B1. One of the first through holes B1 can be used for a liquid cooling pipe 401 to pass through. The connection between the liquid cooling pipe 401 and the power terminal 300 is located on the side of the seal 500 away from the protective shell 200. The seal 500 is fixed inside the gun head 100 and contacts the inner wall of the terminal cavity C to seal the terminal cavity C.

[0065] For example, the seal 500 is elastic, and this elastic structure allows it to fit tightly against the mating parts, thereby improving sealing performance. For instance, the seal 500 can be made of rubber or other elastic materials (such as silicone, thermoplastic elastomer TPE, etc.). Specifically, the outer wall of the seal 500 forms an interference fit with the inner wall of the terminal cavity C, and the inner wall of the first through hole B1 also forms an interference fit with the outer wall of the liquid cooling pipe 401, thus achieving a good sealing effect at multiple contact interfaces, preventing liquid or impurities from seeping in, and ensuring the safety and reliability of the charging gun 000 operation.

[0066] When using the charging gun 000, the gun head 100 is plugged into the socket of the device to be charged (such as an electric vehicle), so that the terminals of the gun head 100 are electrically connected to the vehicle's docking terminals, thereby completing power transmission. By setting a sealing element 500 inside the gun head 100 and making it contact the inner wall surface of the terminal cavity C to seal the terminal cavity C, when coolant leakage occurs at the connection between the connecting wire 400 and the power terminal 300, it can effectively prevent coolant from leaking out of the terminal cavity C, significantly improving the overall sealing performance and safety of the charging gun 000. Compared with the potting sealing structure used in related technologies, the embodiments of this application do not require the design of special molds and the execution of complex potting processes, simplifying the operation procedures and reducing production costs.

[0067] In some embodiments, combined with Figure 8 and Figure 9 The charging gun 000 also includes at least two fasteners 600. One fastener 600 is sleeved on a liquid cooling tube 401 and a power terminal 300. The fastener 600 is elastic and is used to clamp a liquid cooling tube 401 and a power terminal 300.

[0068] For example, fastener 600 is a ring structure made of a metal material, possessing good elasticity and mechanical strength. For instance, the metal material can be spring steel, stainless steel, or copper alloy, and its specific form can be a spring ring, snap ring, or elastic clamping ring.

[0069] By incorporating at least two fasteners 600 within the charging gun 000, each fastener 600 is fitted around the corresponding liquid cooling pipe 401 and power terminal 300, using its elasticity to clamp and secure them. This not only enhances the connection stability between the liquid cooling pipe 401 and the power terminal 300 but also further improves the sealing performance of this connection. During charging, especially under conditions of vibration or temperature changes, the fasteners 600 effectively prevent loosening or misalignment between the liquid cooling pipe 401 and the power terminal 300, thereby reducing the risk of coolant leakage and preventing electrical faults or safety accidents caused by unstable connections. Furthermore, this fastening structure is easy to install, requiring no complex assembly processes, which helps improve production efficiency.

[0070] In this embodiment, the seal 500 and fastener 600 in the charging gun 000 are both located inside the terminal cavity C, and the seal 500 is located between the fastener 600 and the protective shell 200.

[0071] By placing both the seal 500 and the fastener 600 inside the terminal cavity C, the internal space of the terminal cavity C is utilized efficiently, reducing the number of external structures and thus improving the overall compactness of the charging gun 000. This also simplifies the design of the external structure of the terminal cavity C. Furthermore, the seal 500 is positioned between the fastener 600 and the protective shell 200, allowing the fastener 600 to prioritize the connection and fixation of the liquid cooling pipe 401 and the power terminal 300, while the seal 500 further prevents the possibility of coolant leakage to the outside of the terminal cavity C.

[0072] In some embodiments, reference Figure 7 and Figure 9 The charging gun 000 also includes a cover plate 700 fixed to the gun head 100. The cover plate 700 can be located on the side of the seal 500 facing the protective shell 200, and the cover plate 700 can cover the opening K.

[0073] The cover plate 700 can be made of any suitable material to meet the requirements of structural strength, protective performance and manufacturing process.

[0074] In one embodiment, the cover 700 is made of rigid plastic, such as polycarbonate (PC), polyvinyl chloride (PVC), or acrylonitrile-butadiene-styrene copolymer (ABS). These materials possess good mechanical strength, wear resistance, and weather resistance, effectively protecting the internal components of the charging gun 000 from external environmental influences. Furthermore, rigid plastics are easy to process and mold, facilitating structural optimization according to specific design requirements and making them suitable for mass production.

[0075] In another embodiment, the cover plate 700 can also be made of other types of rigid materials, such as metals, including but not limited to aluminum alloys and stainless steel. Metal cover plates 700 have higher structural strength and excellent thermal conductivity, which helps improve overall heat dissipation while providing stronger physical protection.

[0076] Furthermore, in certain specific applications, the cover plate 700 can also partially utilize flexible materials, such as rubber or silicone, as an auxiliary structure. This design can further enhance sealing and cushioning performance while ensuring sufficient rigidity.

[0077] In the embodiments of this application, such as Figure 9 As shown, one of the sidewalls of the terminal cavity C and the cover plate 700 has one or more locking blocks P, and the other has one or more locking slots Q. One locking block P is engaged with one locking slot Q. For example, there is one locking block P and one locking slot Q, and the locking block P is engaged in the locking slot Q. Or, for another example, there are multiple locking blocks P and multiple locking slots Q, and multiple locking blocks P and multiple locking slots Q are arranged in a one-to-one correspondence, so that one locking block P can be engaged in the corresponding locking slot Q.

[0078] By embedding the locking block P into the locking slot Q to achieve a mating connection, displacement of the cover plate 700 during use can be effectively prevented, thereby improving the stability of the connection between the cover plate 700 and the side wall of the terminal cavity C. At the same time, since there is a clear mating relationship between the locking block P and the locking slot Q, it can play a positioning and guiding role during assembly, which helps to achieve accurate alignment and installation of the cover plate 700, avoid misalignment, and improve assembly efficiency.

[0079] In some embodiments, the sidewall of the terminal cavity C and the cover plate 700 can be flexibly provided with matching locking blocks P and locking slots Q. For example, when a locking slot Q is provided on the sidewall of the terminal cavity C, a corresponding locking block P is provided on the cover plate 700; conversely, if a locking block P is provided on the sidewall of the terminal cavity C, a locking slot Q is adapted to be provided on the cover plate 700. For ease of explanation, this application uses a structure in which a locking block P is provided on the sidewall of the terminal cavity C and a locking slot Q is provided on the cover plate 700 as an example for detailed description.

[0080] In one embodiment, the terminal cavity C in the gun head 100 is a single, integral cavity; in another embodiment, such as... Figure 4 and Figure 5 As shown, the charging gun 000's head 100 may include a partition 101, which is fixed within the terminal cavity C and divides the terminal cavity C into a first cavity C1 and a second cavity C2 that are independent of each other. At least two power terminals 300 include a positive terminal 300A and a negative terminal 300B. At least a portion of the positive terminal 300A is located within the first cavity C1, and at least a portion of the negative terminal 300B is located within the second cavity C2.

[0081] By dividing the terminal cavity C into two independent cavities C1 and C2 by the partition 101, which respectively accommodate the positive terminal 300A and the negative terminal 300B, physical isolation of the positive terminal 300A and the negative terminal 300B (the positive and negative electrical connection parts) is achieved in space. This effectively prevents safety hazards such as short circuits caused by coolant leakage between the positive and negative terminals, and significantly improves the overall safety of the charging gun 000.

[0082] In some embodiments, such as Figure 9 As shown, the sealing element 500 in the charging gun 000 may include a first sub-part 501 and a second sub-part 502. The first sub-part 501 contacts the inner wall surface of the first cavity C1 and is used to seal the first cavity C1. The second sub-part 502 contacts the inner wall surface of the second cavity C2 and is used to seal the second cavity C2.

[0083] The seal 500 adopts a split structure including a first sub-part 501 and a second sub-part 502, which independently seals the first cavity C1 and the second cavity C2, thereby improving the reliability of the seal and facilitating assembly and maintenance.

[0084] In some embodiments, such as Figure 6 As shown, at least two connecting lines 400 include a positive connecting line 400A and a negative connecting line 400B. The first sub-part 501 and the second sub-part 502 each have one or more first through holes B1. The liquid cooling tube 401 in the positive connecting line 400A can pass through one of the first through holes B1 on the first sub-part 501 and be sleeved outside the positive terminal 300A. The bare power line 402 in the positive connecting line 400A can be electrically connected to the positive terminal 300A. Similarly, the liquid cooling tube 401 in the negative connecting line 400B can pass through one of the first through holes B1 on the second sub-part 502 and be sleeved outside the negative terminal 300B. The bare power line 402 in the negative connecting line 400B can be electrically connected to the negative terminal 300B.

[0085] Each sub-part of the seal 500 is provided with a first through hole B1 for the connecting wire 400 to pass through, so that the positive connecting wire 400A and the negative connecting wire 400B can pass through the corresponding sealing sub-part respectively and connect to the positive terminal 300A and the negative terminal 300B, further enhancing the electrical isolation and sealing performance between the cavities.

[0086] In the embodiments of this application, please refer to Figure 8 and Figure 9 The charging gun 000 may also include at least two flow tubes 800, each power terminal 300 having a channel L, and one flow tube 800 being connected to a liquid cooling pipe 401 of a connecting wire 400 through the channel L of one power terminal 300.

[0087] Figure 10 This is a schematic diagram of the structure of a sealing element provided in an embodiment of this application. The sealing element 500 in the charging gun 000 may further include at least two second through holes B2, and a flow tube 800 may pass through one of the second through holes B2.

[0088] By setting a channel L in the power terminal 300 and connecting the flow pipe 800 and the liquid cooling pipe 401 in the connecting line 400, the coolant can circulate between the power terminal 300 and the connecting line 400, effectively removing the heat generated during the charging process and significantly improving the heat dissipation efficiency of the charging gun 000.

[0089] In some embodiments, please refer to Figure 11 , Figure 11This is a partial structural cross-sectional view of another charging gun provided in the embodiments of this application. The charging device 010 may also include a cooling assembly 00, which may include a circulation pump 01 and a condenser 02. The circulation pump 01 is used to drive the coolant to flow in the liquid cooling pipe 401 in the connecting line 400, and the condenser 02 is used to perform heat exchange and cooling on the coolant flowing through it.

[0090] In some embodiments, such as Figure 9 As shown, the charging gun 000 also includes a temperature sensor 900, which is fixed inside the terminal cavity C and in contact with the side wall of the power terminal 300.

[0091] By installing a temperature sensor 900 in the terminal cavity C that is in direct contact with the side wall of the power terminal 300, the temperature change of the power terminal 300 during operation can be monitored in real time and accurately, thereby providing feedback on the operating status of the cooling assembly 00 and realizing cooling control of the power terminal 300.

[0092] In some embodiments, a leakage detector (not shown) is provided at the bottom of the terminal cavity. The leakage detector has conductive contacts that trigger an alarm signal when coolant comes into contact with the conductive contacts.

[0093] By installing a leak detector with conductive contacts at the bottom of terminal cavity C, when coolant leaks and accumulates at the detection location due to seal failure, the conductive properties of the coolant trigger the conductive contacts, thereby generating an alarm signal. This allows for timely detection of even minor leaks, providing real-time safety warnings and effectively preventing coolant from spreading to electrical connection areas and causing short circuits or other safety hazards. This significantly improves the safety of the charging gun 000 under liquid-cooled conditions.

[0094] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0095] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A charging gun, characterized in that, Includes a gun head, a protective shell, at least two power terminals, and at least two connecting wires; The gun head is fixed to one end of the protective shell. The gun head has a terminal cavity, and the at least two power terminals are located in the terminal cavity. The end of the gun head away from the protective shell has at least two openings, which communicate with the terminal cavity. One of the openings exposes one of the power terminals. A portion of each of the connecting wires passes through the protective shell and extends into the nozzle. Each of the connecting wires includes a liquid cooling tube and a bare power wire. The liquid cooling tube is used to supply coolant flow, and the bare power wire is located inside the liquid cooling tube. One of the liquid cooling tubes is sleeved over one of the power terminals, and the bare power wire inside the one of the liquid cooling tubes is connected to the one of the power terminals. The charging gun also includes a sealing element having at least two first through holes, one of which is for a liquid cooling tube to pass through; the connection between the liquid cooling tube and the power terminal is located on the side of the sealing element away from the protective shell, and the sealing element contacts the inner wall surface of the terminal cavity and is used to seal the terminal cavity.

2. The charging gun according to claim 1, characterized in that, The charging gun also includes at least two fasteners, one of which is sleeved on the liquid cooling tube and the power terminal, and the fastener is elastic and used to clamp the liquid cooling tube and the power terminal.

3. The charging gun according to claim 2, characterized in that, Both the seal and the fastener are located within the terminal cavity, with the seal positioned between the fastener and the protective shell.

4. The charging gun according to any one of claims 1-3, characterized in that, The charging gun also includes a cover plate fixed to the gun head, the cover plate being located on the side of the seal facing the protective shell, and the cover plate covering the opening.

5. The charging gun according to claim 4, characterized in that, One of the sidewalls of the terminal cavity and the cover plate has one or more locking blocks, and the other has one or more locking slots, with one locking block engaging with one locking slot.

6. The charging gun according to any one of claims 1-5, characterized in that, The at least two power terminals include a positive terminal and a negative terminal; The gun head includes a partition plate, which is fixed inside the terminal cavity and divides the terminal cavity into a first cavity and a second cavity. At least a portion of the positive terminal is located in the first cavity, and at least a portion of the negative terminal is located in the second cavity. The sealing element includes a first sub-part and a second sub-part. The first sub-part contacts the inner wall surface of the first cavity and is used to seal the first cavity. The second sub-part contacts the inner wall surface of the second cavity and is used to seal the second cavity. The first sub-part and the second sub-part each have one or more first through holes. The at least two connecting wires include a positive connecting wire and a negative connecting wire. The liquid cooling tube of the positive connecting wire passes through a first through hole on the first sub-part and is sleeved on the positive terminal. The bare power line in the positive connecting wire is electrically connected to the positive terminal. The liquid cooling tube of the negative connecting wire passes through a first through hole on the second sub-part and is sleeved on the negative terminal. The bare power line in the negative connecting wire is electrically connected to the negative terminal.

7. The charging gun according to any one of claims 1-6, characterized in that, The charging gun also includes at least two flow tubes, each of the power terminals is provided with a channel, and one of the flow tubes is connected to the liquid cooling tube of one of the connecting wires through the channel of one of the power terminals; The seal also includes at least two second through holes, with one of the flow tubes passing through one of the second through holes.

8. The charging gun according to any one of claims 1-7, characterized in that, The charging gun also includes a temperature sensor, which is fixed inside the terminal cavity and in contact with the side wall of the power terminal.

9. The charging gun according to any one of claims 1-8, characterized in that, A leakage detector is provided at the bottom of the terminal cavity. The leakage detector has conductive contacts, and an alarm signal is triggered when the coolant comes into contact with the conductive contacts.

10. A charging device, characterized in that, The device includes a power conversion device, a cooling assembly, and a charging gun according to any one of claims 1-9; the power conversion device is electrically connected to the bare power line of each of the connecting lines, the power conversion device is used to output electrical energy to the charging gun, and the cooling assembly is used to cool the coolant and drive the coolant to flow in the liquid cooling pipe.

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