Charging socket with drainage structure, charging system and new energy automobile

Abstract

The invention discloses a charging socket with a drainage structure, a charging system and a new energy automobile, and aims to solve the problems of insufficient rigidity of a dustproof cover, poor AC / DC adaptation stability, unstable low-temperature plugging force and easy generation of structural depression in the prior art. The charging socket with the drainage structure comprises a charging socket insulating shell, wherein the charging socket insulating shell comprises a direct current insulating seat and an alternating current insulating seat which can be independently detached; a drain hole is formed in the bottom of each terminal cavity of the alternating current insulating seat; independent drainage runners are arranged at one end, close to the drainage ports of the terminal cavities, of the alternating current insulating seat, and are communicated with the drainage holes in the bottoms of the terminal cavities in a one-to-one correspondence manner; the alternating current insulating seat and the direct current insulating seat are respectively provided with an alternating current insulator peripheral flow channel and a direct current insulator peripheral flow channel which are communicated with the independent drainage flow channel; and the bottom of the charging socket insulating shell is provided with a bottom drainage port which is communicated with the alternating current insulator peripheral flow channel and the direct current insulator peripheral flow channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging socket drainage, in particular to a charging socket with a drainage structure, a charging system and a new energy vehicle. BACKGROUND

[0002] The core connecting components of the new energy vehicle charging system are the vehicle charging socket and the charging pile charging gun, and the two cooperate to realize power transmission. Since a large number of public charging piles are deployed in outdoor open environments, the terminals of the charging socket are exposed to rain, snow, condensation and other weather conditions for a long time, and the terminal cavities, hole positions and plug-in cavities are prone to accumulate water. Especially the terminal cavities of European and American standard charging interfaces adopt a cylindrical structure, the water accumulation discharge path is limited and difficult to naturally drain; long-term water accumulation can corrode the terminal contacts and reduce the insulation performance, directly affecting the service life of the terminal and the safety of the charging; in extremely cold environments, water accumulation is easy to condense into ice, which may also cause the charging gun and the socket to be stuck and unable to separate, seriously hindering the normal progress of the charging process; therefore, efficient drainage design of the charging socket is a key technical requirement to ensure its outdoor use reliability.

[0003] In the existing technology, although there are charging sockets with drainage function, the drainage design does not cover all independent holes, or the drainage flow channel design is complex and finally discharged through a single drainage port, resulting in limited drainage effect. The specific problems are as follows:

[0004] (1) A single drainage hole is provided at the bottom of the charging socket insulating shell, and no dedicated drainage channel is designed for each terminal cavity or independent hole position, relying on the natural flow of accumulated water in the shell to the bottom drainage hole for discharge, without directional flow guide structure; that is, there is no terminal single-hole drainage structure, and there is no independent terminal cavity drainage channel, making it difficult to drain the accumulated water in the cylindrical terminal cavity, and the residual water cannot be completely drained.

[0005] (2) Although there are schemes to set up drainage flow channels to solve the problem of drainage of the terminal cavities, some of the drainage flow channels themselves are not reasonably set up or the flow channel is set up in a complex way and finally discharged through a single drainage port, thereby affecting the drainage speed; that is, the flow channel layout for multiple groups of terminal cavities is unreasonable, the accumulated water flow path is blocked, the flow resistance is large, and the drainage efficiency is low; the complex design of some drainage structures increases the difficulty of mold processing, and the balance between drainage efficiency and processing cost is not achieved.

[0006] (3) The drainage design of the charging socket insulating shell relies on one or more waterproof structures to complete the drainage, that is, the insulating shell itself cannot realize effective drainage function.

[0007] (4) The current charging socket insulation shell generally adopts the method of one-piece injection molding, and the solidification structure seriously restricts the optimization design of the drainage system and the internal flow channel, and there are problems of great molding difficulty and poor maintenance and replaceability; that is, there are limitations, including limited drainage port and internal flow channel design, high molding process difficulty, and insufficient overall structure in maintenance and component replacement.

[0008] It should be particularly noted that the analysis of the above technical information is the result of creative labor, and the detailed description in the background art section is only intended to deepen the understanding of the non-obviousness of the overall background art of the present application by the person skilled in the art, and should not be regarded as acknowledging or implying in any form that the above technical information has constituted the prior art known to the person skilled in the art. SUMMARY

[0009] In view of the deficiencies in the above background art, the present application provides a charging socket with a drainage structure, a charging system and a new energy vehicle to solve the technical problems of incomplete water drainage, low drainage efficiency due to unreasonable drainage flow channel layout, dependence on additional waterproof or sealing structure, and difficulty in maintenance and replacement of one-piece structure in the prior art.

[0010] The technical scheme of the present application is as follows:

[0011] A charging socket with a drainage structure, comprising a charging socket insulation shell, the charging socket insulation shell comprising a direct current insulation seat and an independent detachable alternating current insulation seat, the alternating current insulation seat being arranged above the direct current insulation seat;

[0012] A plurality of terminal cavities are arranged in the alternating current insulation seat, and a drainage hole is arranged at the bottom of each terminal cavity, the drainage hole comprising an inclined drainage hole I with a flow guide slope and / or a vertical drainage hole II;

[0013] One end of the alternating current insulation seat near the drainage port of the terminal cavity is provided with an independent drainage flow channel, and the independent drainage flow channel is in one-to-one correspondence with the drainage hole at the bottom of each terminal cavity;

[0014] The alternating current insulation seat and the direct current insulation seat are respectively provided with an alternating current insulation body peripheral flow channel and a direct current insulation body peripheral flow channel connected with the independent drainage flow channel, and the bottom of the charging socket insulation shell is provided with a bottom drainage port connected with the alternating current insulation body peripheral flow channel and the direct current insulation body peripheral flow channel, and the accumulated water discharged from the drainage hole is collected through the independent drainage flow channel and the peripheral flow channel and then discharged from the bottom drainage port.

[0015] Advantages:

[0016] Breaking through the structural limitations of unibody molding: Completely solving the constraints of existing unibody injection-molded charging socket insulation shells on drainage system and internal flow channel optimization design. The split architecture allows AC and DC sides to independently plan flow channel routes and drain hole positions according to their respective terminal layouts and drainage requirements, without being limited by the overall solidified structure. This greatly improves the design flexibility and adaptability of the drainage system, easily meeting the drainage requirements of different charging interfaces such as European and American standards.

[0017] Significantly reduced maintenance and replacement costs: In existing one-piece molded structures, if a terminal cavity or flow channel is damaged or blocked, the entire insulating shell must be replaced, resulting in high maintenance costs and long maintenance time. In this solution, the AC insulation base can be disassembled independently. When the AC side drainage structure fails, the terminal cavity is worn, or the flow channel is blocked, only the AC insulation base needs to be replaced, without involving the DC insulation base and other components, thus reducing maintenance costs and shortening downtime for maintenance.

[0018] Improved assembly and debugging efficiency: The modular design allows AC and DC insulation bases to be manufactured separately, with drainage performance (such as flow path unobstructedness, drainage speed, and sealing reliability) tested individually before assembly. This avoids overall rework caused by localized drainage problems in a single-piece structure, significantly improving production pass rate and assembly efficiency, and shortening the production cycle.

[0019] Enhance product upgrade and iteration flexibility: When charging interface standards are updated (such as terminal quantity and layout adjustments) or drainage requirements are optimized (such as improving drainage speed and adapting to harsher environments), only the AC insulation base needs structural iteration, while the DC insulation base remains unchanged. This eliminates the need to redesign the overall mold, reducing the R&D cost and cycle of product upgrades and enhancing product market competitiveness.

[0020] Achieving "zero residue" of water accumulation in terminal cavities: Addressing the core pain points of existing technologies with single-hole drainage structures without terminals and the difficulty in draining water from cylindrical terminal cavities, we have constructed an independent drainage pattern of "one cavity, one hole". Each terminal cavity is equipped with a dedicated drainage channel, blocking the path of water residue from the source and completely solving the problem of water accumulation corroding terminal contacts and reducing insulation performance, thus extending the service life of terminals.

[0021] Balancing drainage efficiency and structural adaptability: Inclined drainage hole I guides the directional flow of accumulated water through a flow-guiding slope, accelerating drainage through the combined effects of gravity and the slope's guidance. It is particularly suitable for terminal cavities located at the top where natural water flow resistance is high. Vertical drainage hole II relies directly on gravity for rapid "direct-fall" drainage, with low flow resistance, making it suitable for terminal cavities located at the bottom and close to the outer flow channel. The two drainage hole types precisely match the spatial characteristics of different terminal cavities, ensuring thorough drainage while avoiding the efficiency limitations caused by a single drainage hole type.

[0022] Enhanced adaptability to extreme cold environments: Residual water is the root cause of charging guns and sockets freezing and jamming in extremely cold environments. This solution quickly drains water from the terminal cavity through a dedicated drainage hole, fundamentally eliminating the risk of freezing and ensuring that the charging gun and socket can still separate normally in low-temperature environments, guaranteeing the continuity and reliability of the charging process.

[0023] Based on the above technical solution, as a preferred technical solution for the charging socket with drainage structure, the multiple terminal cavities in the AC insulation base include terminal cavity group I, terminal cavity group II and terminal cavity group III arranged from top to bottom. Terminal cavity group I includes two first terminal cavities, terminal cavity group II includes three second terminal cavities, and terminal cavity group III includes two third terminal cavities. The inclined drainage hole I is located at the bottom of the first terminal cavity, and the vertical drainage hole II is located at the bottom of the second and third terminal cavities.

[0024] Further beneficial effects of this technical solution:

[0025] Achieving precise adaptation of the drainage hole layout: The drainage hole type is designed based on the vertical arrangement of the terminal cavity groups and the spatial height difference. Terminal cavity group I is located at the top, and the inclined drainage hole I can overcome the drainage resistance caused by the height difference through the flow guide slope, and guide the accumulated water to converge efficiently in the direction of the flow channel. Terminal cavity groups II and III are located at the bottom and are closer to the outer flow channel. The vertical drainage hole II can shorten the drainage path and reduce flow loss, forming an optimized design of "group adaptation and layered drainage".

[0026] Simplify the flow channel connection logic and reduce the processing difficulty: The same type of drainage hole is used in the same group of terminal cavities, which makes the design of subsequent independent drainage channels more regular and avoids too many flow channel intersections and turns due to the chaotic drainage hole types. This reduces the mold complexity of flow channel processing and reduces the risk of water stagnation in the flow channel.

[0027] Improved internal structural coordination: The matching design of terminal cavity grouping and drainage hole type makes the internal structure of the charging socket more regular, which not only ensures the rationality of terminal installation (meeting the spacing and insulation requirements of power transmission), but also takes into account the high efficiency of drainage function, realizing the synergistic optimization of "power transmission function" and "drainage function" and avoiding structural conflicts.

[0028] Based on the above technical solution, as a preferred technical solution for the charging socket with drainage structure, the independent drainage channel includes channel I and channel II. Channel I is connected to the inclined drainage hole I at the bottom of the first terminal cavity, and channel II is connected to the vertical drainage hole II at the bottom of the second terminal cavity and the third terminal cavity. Channel I and channel II do not interfere with each other.

[0029] Further beneficial effects of this technical solution:

[0030] To address flow channel congestion and improve drainage efficiency: Existing technologies often involve multiple terminal cavities sharing complex flow channels, leading to obstructed flow paths and congestion caused by water accumulating in different cavities. This solution employs a "grouped corresponding flow channel" design. Flow channel I is specifically designed to receive water from terminal cavity group I, while flow channel II is specifically designed to receive water from terminal cavities groups II and III. This prevents water from different terminal cavity groups from interfering with each other within the flow channels, significantly reducing flow resistance and improving drainage speed compared to existing technologies.

[0031] Enhanced reliability and redundancy of the drainage system: Flow channel I and flow channel II do not interfere with each other, forming independent drainage branches. If one flow channel fails due to sudden events such as blockage by foreign objects or wear, the other flow channel can still work normally, avoiding paralysis of the entire drainage system; at the same time, independent flow channels facilitate quick location of faults (if the drainage of flow channel I is abnormal, only terminal cavity group I and the corresponding flow channel need to be checked), reducing the difficulty of maintenance and troubleshooting.

[0032] Balancing drainage efficiency and processing costs: Compared with the complex confluence channels in existing technologies, the grouped independent channel structure of this solution is simpler, eliminating the need for complex confluence nodes, reducing mold processing difficulty, and controlling manufacturing costs, thus achieving the optimal balance between "efficient drainage" and "low-cost processing".

[0033] Based on the above technical solution, as a preferred technical solution for the charging socket with drainage structure, there are two independent flow channels I and five independent flow channels II. Flow channel I is an inclined flow channel that connects the corresponding inclined drainage hole I with the external flow channel of the AC insulator, and flow channel II is a vertical flow channel that connects the corresponding vertical drainage hole II with the external flow channel of the AC insulator.

[0034] Further beneficial effects of this technical solution:

[0035] Achieving precise flow guidance with "one channel per hole": the number of channels corresponds one-to-one with the number of drainage holes (2 channels I correspond to 2 inclined drainage holes I, and 5 channels II correspond to 5 vertical drainage holes II). The water accumulated in each terminal cavity is directly discharged through a dedicated channel, without any diversion or confluence links. The drainage path is the shortest and the flow resistance is the lowest, completely solving the problem of residual water accumulation and ensuring thorough drainage.

[0036] The depth of the flow channel type and the drainage hole type are matched to improve the smoothness of flow: the inclined flow channel I continues the guiding slope advantage of the inclined drainage hole I, so that the water in the flow channel is kept in an accelerated flow state and the water is prevented from stagnating at the turning point of the flow channel; the vertical flow channel II and the vertical drainage hole II are smoothly connected, and the "straight drop" drainage is achieved by gravity, with the flow loss approaching zero, further improving the drainage efficiency.

[0037] Reduce the risk of flow channel blockage and improve system stability: The independent and simple flow channel structure (without complex bends and confluence nodes) reduces dead zones for foreign object accumulation and lowers the probability of blockage; even if the flow channel corresponding to a certain terminal cavity is blocked, it will not affect the normal drainage of other flow channels, ensuring the overall stability and redundancy of the drainage system.

[0038] Based on the above technical solution, as a preferred technical solution for the charging socket with drainage structure, the two side walls of the AC insulation base are respectively provided with drainage outlets I that are connected to the corresponding flow channels I, and the side wall of the AC insulation base near the DC insulation base is respectively provided with drainage outlets II that are connected to each flow channel II. Both drainage outlets I and drainage outlets II are connected to the outer flow channels of the AC insulator.

[0039] Further beneficial effects of this technical solution:

[0040] Distributing drainage pressure and avoiding congestion at a single drain outlet: Existing technologies often use a single drain outlet to discharge all accumulated water, which can easily lead to drain outlet saturation and water overflow. This solution sets up 7 drain outlets (2 drain outlets I + 5 drain outlets II), which significantly improves the total flow capacity of the drain outlets, distributes the water collected in different flow channels, and completely avoids water stagnation or overflow at the end of the flow channels.

[0041] Optimize drainage path and shorten confluence distance: Drainage outlet I is located on both sides of the AC insulation base, precisely matching the inclined guiding direction of flow channel I. Accumulated water can be directly discharged from both sides to the outer flow channel of the AC insulator without additional turning; Drainage outlet II is located on the side wall near the DC insulation base, consistent with the vertical drainage direction of flow channel II. Accumulated water flows into the outer flow channel through a short path, further reducing flow resistance and improving drainage response speed.

[0042] Enhance the independence and reliability of the AC side drainage system: Multiple drainage outlets are directly connected to the external flow channel of the AC insulator, without relying on the flow channel of the DC insulation base for transfer, ensuring that the AC side drainage system can work independently, avoiding the impact of DC side structural failure on the AC side drainage function, and improving the overall reliability of the drainage system.

[0043] Based on the above technical solutions, as a preferred technical solution for the charging socket with drainage structure, the DC insulation base is provided with two fourth terminal cavities, each fourth terminal cavity has a vertical drainage hole Ⅲ at its bottom, and the side wall of the DC insulation base near the ground is provided with a drainage outlet Ⅲ that communicates with the outer flow channel of the DC insulator. The vertical drainage hole Ⅲ is connected to the drainage outlet Ⅲ through the flow channel Ⅲ.

[0044] Further beneficial effects of this technical solution:

[0045] This solution constructs an independent DC-side drainage system to fill a technological gap: Existing technologies often rely on AC-side drainage systems or additional waterproof structures for DC-side drainage, resulting in poor drainage performance and high dependence. This solution equips each fourth terminal cavity of the DC electrical insulation base with a dedicated drainage hole (vertical drainage hole III), a flow channel (flow channel III), and a drainage outlet (drainage outlet III), forming a complete independent DC-side drainage system and completely solving the problem of water accumulation in the DC terminal cavities.

[0046] The drainage path is shortest and the efficiency is optimal: Drainage outlet Ⅲ is located on the side wall of the DC insulation base near the ground. Flow channel Ⅲ directly connects the vertical drainage hole Ⅲ and drainage outlet Ⅲ. Accumulated water is quickly discharged from the bottom of the terminal cavity through flow channel Ⅲ to the outer flow channel of the DC insulator, and then flows into the bottom drainage outlet. The drainage path is short and there are no redundant turns. The drainage speed is improved compared with the existing DC side drainage scheme.

[0047] No need to rely on additional waterproof structures, simplifying system design: The DC side drainage system uses an integrated design of "drain hole + flow channel + drain outlet" to enable the DC insulation base itself to achieve effective drainage without relying on additional mating components such as waterproof gaskets and seals, reducing the number of parts and assembly steps, lowering the risk of mating failure and manufacturing costs.

[0048] Based on the above technical solution, as a preferred technical solution for the charging socket with drainage structure, there are two vertical drainage holes Ⅲ that are independent of each other, and two flow channels Ⅲ that are independent of each other. The flow channel Ⅲ is a vertical flow channel that connects the corresponding vertical drainage hole Ⅲ with the flow channel on the periphery of the DC insulator.

[0049] Further beneficial effects of this technical solution:

[0050] To ensure the independence and redundancy of DC-side drainage: The two fourth terminal cavities correspond to independent vertical drainage holes III and flow channels III, respectively. The water accumulated in each DC terminal cavity is discharged separately, avoiding drainage delays or blockages caused by sharing flow channels. Even if one flow channel fails, the other flow channel can still drain normally, ensuring that the DC-side drainage function is not interrupted and improving system redundancy.

[0051] Simplified flow channel structure reduces processing and assembly difficulty: The vertical flow channel III has a simple structure with no complex bends, making mold processing easier and product qualification rate higher; at the same time, the vertical straight channel connects smoothly with the vertical drain hole III and drain outlet III without obvious turns, reducing alignment errors during assembly and improving assembly efficiency.

[0052] Balancing drainage function and terminal installation stability: DC terminals (such as DC+ and DC-) typically carry high currents, requiring high sealing and structural stability of the terminal cavity. The independent vertical DC channel design does not affect the terminal installation accuracy or sealing performance, ensuring that the "drainage function" and "power transmission function" do not interfere with each other, thus guaranteeing charging safety.

[0053] Based on the above technical solutions, as a preferred technical solution for the charging socket with drainage structure, the outer flow channel of the AC insulator is located outside the AC insulation base, the outer flow channel of the DC insulator is located outside the DC insulation base, and the outer flow channel of the AC insulator is connected to the outer flow channel of the DC insulator to form a through-type confluence channel.

[0054] Further beneficial effects of this technical solution:

[0055] The system achieves efficient water collection by "single-point drainage, multi-point convergence, and unified discharge": water from the seven drain outlets on the AC side is collected through the outer channel of the AC insulator, and water from the two drain outlets on the DC side is collected through the outer channel of the DC insulator. The system is then designed to achieve unified water collection on both sides and finally discharge the water from the bottom drain outlet, thus avoiding the formation of "island-like" stagnation of water between the AC and DC sides.

[0056] Simplified busbar structure and reduced assembly complexity: The through-type busbar channel does not require additional transfer channels or connecting components. The outer channels of the AC insulator and the outer channels of the DC insulator are directly connected, resulting in a simple structure. During assembly, only the positioning accuracy of the two insulator bases needs to be ensured. There is no need to make additional adjustments to the busbar interface, reducing assembly difficulty and error risk.

[0057] Improve the overall smoothness of the drainage system: The through-type manifold has a large flow cross-section, which can quickly receive the accumulated water from multiple drain outlets on the AC and DC sides, avoid bottlenecks in the manifold, and ensure that the entire drainage path (terminal cavity → drain hole → independent flow channel → drain outlet → peripheral flow channel → bottom drain outlet) is unobstructed, further improving the overall drainage efficiency.

[0058] Based on the above technical solutions, as a preferred technical solution for the charging socket with drainage structure, the insulating shell of the charging socket is a split injection molding structure, and the injection mold structures of the AC insulating base and the DC insulating base are independently set.

[0059] Further beneficial effects of this technical solution:

[0060] Reduce molding process complexity and improve product yield: Existing one-piece injection molding structures are prone to defects such as runner blockage, mold wear, and product bubbles / shrinkage marks due to their complex internal runners, high mold design difficulty, and high machining precision requirements. This solution adopts split injection molding, with independent mold designs for the two insulating seats. The mold cavity can be optimized for the runner and drainage hole structures of each, reducing mold complexity, lowering the incidence of molding defects, and improving product yield.

[0061] Facilitates optimization and iteration of flow channels and drainage holes: When it is necessary to adjust parameters such as drainage hole angle, flow channel cross-sectional size, and drainage outlet position, only the mold of the corresponding insulating seat needs to be modified, without replacing the entire mold, thus reducing R&D costs and shortening the product upgrade cycle.

[0062] Improved production flexibility and cost controllability: Separate injection molding allows for separate control of the injection process parameters (such as temperature, pressure, and injection speed) for AC and DC insulation bases, adapting to their respective structural characteristics and avoiding low yield rates caused by conflicting process requirements of different parts during integrated injection molding; at the same time, if one insulation base fails to meet the production standards, it will not affect the production progress of the other insulation base, thereby improving overall production efficiency and reducing production costs.

[0063] A charging system includes a charging socket with a drainage structure as described in any of the above technical solutions, and therefore also has the corresponding beneficial effects.

[0064] A new energy vehicle includes the charging system described in the above technical solution, and therefore also has the aforementioned beneficial effects.

[0065] This invention, through an integrated technical solution of "modular detachable design, independent drainage channel layout, precise flow channel matching, and through-flow convergence," comprehensively overcomes four core technical problems existing in current charging sockets: incomplete water drainage, unreasonable drainage channel layout, reliance on additional waterproof structures, and difficulty in maintenance and replacement due to its one-piece molding. The overall beneficial effects are as follows:

[0066] 1. Drainage performance has achieved a leapfrog improvement.

[0067] The innovative design adopts an independent drainage system with "one cavity, one hole, and one flow channel," combining the differentiated adaptation of inclined drainage holes (flow guidance and acceleration) and vertical drainage holes (gravity direct discharge) to completely solve the problem of water accumulation and residue in cylindrical terminal cavities, ensuring thorough drainage.

[0068] The drainage system is constructed with "grouped independent flow channels + multiple drainage outlets + through-type confluence channels", which greatly reduces flow resistance and improves the overall drainage speed compared with existing technologies. It effectively avoids charging gun jamming caused by water accumulation and freezing in extremely cold environments and is suitable for wide temperature operating environments.

[0069] The AC and DC sides each form an independent drainage system, and are discharged uniformly through a through-type confluence channel. The drainage system has strong reliability and redundancy. The failure of a single channel or drain outlet does not affect the overall drainage function, ensuring the continuity of the charging process.

[0070] 2. The structural design is more rational, with outstanding adaptability and stability.

[0071] The modular and detachable design breaks the structural limitations of one-piece molding, greatly increasing the design freedom of the flow channel and drainage hole, and can flexibly adapt to different charging interfaces such as European standard and American standard, making it highly versatile;

[0072] The split structure physically isolates the terminal area from the drainage channel, preventing water from directly contacting the terminals, further improving the insulation performance of the charging socket and the service life of the terminals, and reducing charging safety hazards.

[0073] The type, quantity, and location of the flow channels, drainage holes, and drainage outlets are all adapted to the depth of the terminal cavity layout. The structure is regular, the connection is smooth, there is no complex and redundant design, the assembly precision is high, the structural stability is strong, and the failure rate is reduced after long-term use.

[0074] 3. Manufacturing and maintenance costs are significantly reduced.

[0075] The split injection molding process simplifies mold design, reduces processing difficulty, improves product qualification rate, and reduces manufacturing costs.

[0076] Independent mold design facilitates product upgrades and iterations, eliminating the need for complete mold replacement, shortening the R&D cycle, and adapting to rapid updates of charging interface standards.

[0077] The modular and detachable design makes maintenance and replacement more convenient. For local faults, only the corresponding insulation seat needs to be replaced, which reduces maintenance costs, shortens downtime for maintenance, and significantly reduces the operation and maintenance costs of charging piles.

[0078] 4. Strong functional independence, simplifying system design

[0079] This invention achieves efficient drainage through the integrated design of "drainage hole + independent flow channel + drain outlet + peripheral flow channel" in the insulating shell of the charging socket. It does not require additional waterproof gaskets, seals or other matching parts, reducing the number of parts, simplifying assembly steps, reducing the risk of failure, and improving the long-term stability of the product.

[0080] 5. Wide range of applications and significant economic and social benefits.

[0081] The charging socket of this invention can be directly applied to various new energy vehicle charging systems, especially suitable for harsh environments such as outdoor public charging piles and highway service area charging piles. It can effectively extend the service life of the charging socket and reduce the total life cycle operating cost of the charging pile. At the same time, the improved drainage performance ensures the safety and continuity of the charging process, helps the popularization and promotion of new energy vehicle charging infrastructure, provides technical support for the development of the new energy vehicle industry, and has significant economic and social benefits. Attached Figure Description

[0082] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0083] Figure 1 Axonometric view of a charging socket with a drainage structure Figure 1 ;

[0084] Figure 2 for Figure 1 Axonometric view of the AC insulating base;

[0085] Figure 3 for Figure 1 Axonometric view after the AC power insulator base has been removed;

[0086] Figure 4 This is a cross-sectional view of the drainage channel of the AC insulation base;

[0087] Figure 5 Axial section of AC insulation base Figure 1 ;

[0088] Figure 6 Axial section of AC insulation base Figure 2 ;

[0089] Figure 7 for Figure 1 A partial sectional view;

[0090] Figure 8 Axonometric view of a charging socket with a drainage structure Figure 2 .

[0091] Explanation of reference numerals in the attached figures:

[0092] 100. Insulating housing for charging socket;

[0093] 110. AC insulation base; 111. Terminal cavity group I; 112. Terminal cavity group II; 113. Terminal cavity group III; 114. Inclined drainage hole I; 115. Vertical drainage hole II.

[0094] 120. DC insulation base; 121. Terminal cavity group IV; 122. Vertical drain hole III;

[0095] 130. Independent drainage channel; 131. Channel I; 132. Channel II; 133. Channel III;

[0096] 140. Drainage outlet I; 150. Drainage outlet II; 160. Drainage outlet III;

[0097] 170. External flow channel of AC insulator; 180. External flow channel of DC insulator; 190. Bottom drain outlet. Detailed Implementation

[0098] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0099] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0100] It should be noted that, in the description of this application, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," etc., indicating orientation or positional relationships 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 on this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0101] Furthermore, the terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0102] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0103] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0104] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0105] A charging socket with a drainage structure, such as Figures 1 to 8 As shown, the overall structure and drainage path design are as follows:

[0106] The charging socket insulating housing 100 includes an AC insulating base 110 and a DC insulating base 120. The AC insulating base 110 is independently detachable and is located above the DC insulating base 120. The AC insulating base 110 can be installed or removed in various ways, such as by screw connection or snap-fit ​​connection.

[0107] Each terminal cavity of the AC socket insulation base 110 is provided with an inclined drainage hole I114 or a vertical drainage hole II115 at the bottom. The inclined drainage hole I114 is set with an inclination angle according to the installation direction on the vehicle body to form a guide slope, which significantly improves the self-drainage efficiency and reliability of accumulated water; the vertical drainage hole II115 adopts a vertical channel and directly relies on gravity to achieve rapid self-drainage.

[0108] The inclined drainage hole I 114 and the vertical drainage hole II 115 are connected to the outer channels of the AC insulation base 110 and the DC insulation base 120 through independent drainage channels 130. The outer channels include an AC insulator outer channel 170 and a DC insulator outer channel 180. The AC insulator outer channel 170 is located outside the AC insulation base 110, and the DC insulator outer channel 180 is located outside the DC insulation base 120. The AC insulator outer channel 170 and the DC insulator outer channel 180 are connected to form a through-type confluence channel.

[0109] The AC insulation base 110 has two drain outlets I140 on its two side walls, and five drain outlets II150 on its side wall near the DC insulation base 120. The bottom of each of the two terminal cavities of the DC insulation base 120 has a vertically downward-facing drain hole III122 connected to the DC plug-in cavity; the DC insulation base 120 has two drain outlets III160 on its side wall near the ground. The drain outlets II150 and III160 are used for independent drainage channels 130 connected to the AC insulation outer channel 170 and DC insulation outer channel 180 of the AC and DC insulation bases, respectively. The charging socket insulation housing 100 has two bottom drain outlets III160, which are interconnected with the AC insulation outer channel 170 and DC insulation outer channel 180. This achieves single-point drainage, multi-point convergence, and dual-hole discharge.

[0110] AC drain outlet design, i.e., the relevant structural design of AC insulation base 110:

[0111] The AC insulation base 110 has three rows of terminal cavities arranged in sequence, namely terminal cavity group I 111, terminal cavity group II 112, and terminal cavity group III 113. As shown in the figure, terminal cavity group I includes two first terminal cavities, terminal cavity group II 112 includes three second terminal cavities, and terminal cavity group III 113 includes two third terminal cavities.

[0112] The terminal cavity of the AC socket insulation base 110 is provided with through holes at the bottom, including two inclined drainage holes I114 and five vertical drainage holes II115. The purpose of setting the inclined drainage holes I114 and the vertical drainage holes II115 is to drain the water accumulated inside the terminal cavity.

[0113] An independent drainage channel 130 is provided in front of the AC insulation base 110. The independent drainage channel 130 includes channel I 131 and channel II 132. Each channel of the independent drainage channel 130 is directly connected to the inclined drainage hole I 114 or the vertical drainage hole II 115 at the bottom of the corresponding first terminal cavity, second terminal cavity, and third terminal cavity, and the channels do not interfere with each other.

[0114] An independent drainage channel 130 is located at the front of the AC charging socket 110, achieving physical isolation from the terminal area and effectively ensuring the independence and reliability of the AC charging socket drainage system. The front of the AC charging socket 110 refers to the end face near the opening of the terminal cavity.

[0115] The AC insulation base 110 has two drain outlets I140 on its two side walls and five drain outlets II150 on its side wall near the DC insulation base. Drain outlets I140 and II150 are used to connect the various flow channels I131 and II132 with the outer flow channel 170 of the AC insulator.

[0116] For the drainage structure of the AC insulation base 110, an opening is made at the bottom of the terminal cavity of the AC insulation base 110. Each terminal cavity of the terminal cavity group I111 is directly connected to the drainage channel I131 through the corresponding inclined drainage hole I114. The water flows from the inclined drainage hole I114 through the channel I131 and flows out through the drain outlet I140 to the AC insulator peripheral channel 170, then flows to the DC insulator peripheral channel 180, and finally is discharged from the bottom drain outlet 190 of the charging socket insulation housing 100.

[0117] Each terminal cavity of terminal cavity group II112 and terminal cavity group III113 is directly connected to the drainage channel II132 through the corresponding vertical drainage hole II115. Water flows from the vertical drainage hole II115 through the channel II132 and flows out through the drain outlet II150 to the DC insulator peripheral channel 180, and is finally discharged from the bottom drain outlet 190 of the charging socket insulating housing 100.

[0118] Preferably, there are two independent flow channels I and five independent flow channels II. Flow channel I is an inclined flow channel that connects the corresponding inclined drainage hole I with the flow channel around the AC insulator, and flow channel II is a vertical flow channel that connects the corresponding vertical drainage hole II with the flow channel around the AC insulator.

[0119] DC drain port design, i.e., the related structural design of DC insulation base 120:

[0120] The DC insulation base 120 has two fourth terminal cavities, namely terminal cavity group IV 121. The bottom of terminal cavity group IV 121 has a vertical drain hole III 122 that communicates with the outer flow channel 180 of the DC insulation base. Water accumulated in terminal cavity group IV 121 flows from the vertical drain hole III 122 through the flow channel III 133 and out through the drain outlet III 160 into the outer flow channel 180 of the DC insulator, and is finally discharged from the bottom drain outlet 190 of the charging socket insulating housing 100.

[0121] By designing the AC power insulation base 110 as an independently detachable structure and improving the internal structure of the AC power insulation base 110, and setting an independent single-hole drainage structure for each terminal cavity, the problem of water accumulation in the charging socket terminal cavity that cannot drain or drains slowly can be effectively solved, while avoiding the failure risk caused by the inability of multiple parts to fit together.

[0122] The present invention provides inclined drainage hole I114 and vertical drainage hole II115 at the bottom of the terminal cavity for draining water accumulated in the terminal cavity. An independent drainage channel 130 is provided inside the AC insulation base 110. Water accumulated in each terminal cavity flows through its respective drainage channel I131 and channel II132 to drainage hole I140 and drainage hole II150 and is discharged to the AC insulator peripheral channel 170. The water in the AC insulator peripheral channel 170 and the water discharged from the vertical drainage hole III122, channel III133 and drainage port III160 in sequence are collected at the bottom drainage port 190 and discharged to the outside.

[0123] This invention adopts a modular design with independently detachable AC insulation base, and each terminal cavity is provided with an independent drainage channel, which realizes physical isolation between the terminal and the drainage path and efficient drainage of the charging socket.

[0124] It should be noted that the above embodiments are only preferred embodiments of this application. In other embodiments, the number, position and shape of functional structures such as drainage holes, flow channels and drainage outlets can be changed.

[0125] A charging base for new energy vehicles includes a DC charging port and an AC charging port, wherein the DC charging port and / or the AC charging port are connected to a charging socket with a drainage structure as described in the above technical solution.

[0126] It should be noted that this invention is applicable not only to the DC charging port and AC charging port of new energy vehicle charging docks, but also to the DC charging port and AC charging port of other charging docks.

[0127] A charging system includes a charging socket with a drainage structure as described in the above embodiments. This charging system can be used in devices such as electric vehicles, electric aircraft, electric boats, and outdoor power supply equipment.

[0128] A new energy vehicle includes the charging system described in the above embodiments, wherein the new energy vehicle includes, but is not limited to, pure electric vehicles, hybrid vehicles, and range-extended electric vehicles.

[0129] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0130] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A charging socket having a water drainage structure, characterized by, The charging socket insulation shell comprises a direct-current insulation seat and an independent detachable alternating-current insulation seat arranged above the direct-current insulation seat; The alternating-current insulation seat is internally provided with a plurality of terminal cavities, each of which is provided with a drainage hole at the bottom, the drainage hole comprising an inclined drainage hole I with a flow guide slope and / or a vertical drainage hole II; The alternating-current insulation seat is provided with an independent drainage flow channel at one end of the drainage port of the terminal cavity, and the independent drainage flow channel is in one-to-one correspondence with the drainage hole at the bottom of each terminal cavity. The alternating-current insulation seat and the direct-current insulation seat are respectively provided with an alternating-current insulation body peripheral flow channel and a direct-current insulation body peripheral flow channel in communication with the independent drainage flow channel, and the bottom of the charging socket insulation shell is provided with a bottom drainage port in communication with the alternating-current insulation body peripheral flow channel and the direct-current insulation body peripheral flow channel, and the accumulated water in the drainage hole is discharged from the bottom drainage port through the independent drainage flow channel, the alternating-current insulation body peripheral flow channel and the direct-current insulation body peripheral flow channel.

2. The charging socket with a water drainage structure according to claim 1, characterized in that, The plurality of terminal cavities in the alternating-current insulation seat comprise terminal cavity group I, terminal cavity group II and terminal cavity group III arranged in sequence from top to bottom, the terminal cavity group I comprises two first terminal cavities, the terminal cavity group II comprises three second terminal cavities, and the terminal cavity group III comprises two third terminal cavities; the inclined drainage hole I is arranged at the bottom of the first terminal cavity, and the vertical drainage hole II is arranged at the bottom of the second terminal cavity and the third terminal cavity.

3. The charging socket with a water drainage structure according to claim 2, characterized in that, The independent drainage flow channel comprises flow channel I and flow channel II, the flow channel I is in communication with the inclined drainage hole I at the bottom of the first terminal cavity, the flow channel II is in communication with the vertical drainage hole II at the bottom of the second terminal cavity and the third terminal cavity, and the flow channel I and the flow channel II do not interfere with each other.

4. The charging socket with a water drainage structure according to claim 3, characterized in that, The flow channel I is provided with two independent flow channels, and the flow channel II is provided with five independent flow channels, the flow channel I is an inclined flow channel for connecting the corresponding inclined drainage hole I and the alternating-current insulation body peripheral flow channel, and the flow channel II is a vertical flow channel for connecting the corresponding vertical drainage hole II and the alternating-current insulation body peripheral flow channel.

5. The charging socket with a water drainage structure according to claim 4, characterized in that, The two side walls of the alternating-current insulation seat are respectively provided with a drainage port I in communication with the corresponding flow channel I, and the side wall of the alternating-current insulation seat close to the direct-current insulation seat is respectively provided with a drainage port II in communication with each flow channel II, and the drainage port I and the drainage port II are in communication with the alternating-current insulation body peripheral flow channel.

6. The charging socket with a drainage structure according to any one of claims 1-5, characterized in that, The direct-current insulation seat is internally provided with two fourth terminal cavities, each of which is provided with a vertical drainage hole III at the bottom, and the side wall of the direct-current insulation seat close to the ground is provided with a drainage port III in communication with the direct-current insulation body peripheral flow channel, and the vertical drainage hole III is in communication with the drainage port III through the flow channel III.

7. The charging socket with a water drainage structure according to claim 6, characterized in that, The vertical drainage hole III is provided with two independent vertical drainage holes, and the flow channel III is provided with two independent flow channels, and the flow channel III is a vertical flow channel for connecting the corresponding vertical drainage hole III and the direct-current insulation body peripheral flow channel.

8. The charging socket with drainage structure according to any one of claims 1-5, 7, characterized in that, The alternating-current insulation body peripheral flow channel is arranged outside the alternating-current insulation seat, the direct-current insulation body peripheral flow channel is arranged outside the direct-current insulation seat, the alternating-current insulation body peripheral flow channel is in communication with the direct-current insulation body peripheral flow channel, and a through-type flow channel is formed.

9. The charging socket with a water drainage structure according to claim 8, characterized in that, The charging socket insulation shell is a split type injection molding structure, and the injection mold structures of the alternating-current insulation seat and the direct-current insulation seat are independently arranged.

10. A charging system characterized by, The charging socket with the drainage structure according to any one of claims 1-9.

11. A new energy vehicle, characterized in that, The charging system according to claim 10.

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