Charging plug, charging gun and connector assembly

Abstract

The utility model discloses a charging plug, a charging gun and a connector assembly, and relates to the technical field of ground maintenance. The charging plug comprises a plug body, the end face of the plug body is provided with a plurality of charging terminals and a plurality of fluid interfaces, the plug body further defines a fluid channel and a fluid flowing cavity, and the fluid channel is used for being connected with a cooling source; the fluid flowing-through cavity is communicated with the fluid channel and the fluid connector, the fluid flowing-through cavity is used for allowing heat exchange fluid from a cooling source to flow through, and the fluid connector is used for being communicated with a cooling loop of external equipment; the fluid channel defined by the charging plug is used for being connected with a cooling source, and the fluid flowing cavity is communicated with the fluid channel and the fluid interface, so that the charging plug can be conveniently and quickly communicated with a cooling loop of external equipment such as an electric vehicle through the fluid interface on the charging plug. Therefore, heat management is efficiently carried out on parts to be cooled, such as the power battery pack, of the external equipment, and the heat management capability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ground maintenance, and in particular to a charging plug, a charging gun and a connector assembly. Background Art

[0002] New energy vehicles, eVTOL (Electric Vertical Takeoff and Landing), new energy ships and other electric vehicles that use electricity as the main power source include power battery packs. When performing ground maintenance on electric vehicles, the power battery packs need to be restored to the specified power level.

[0003] In addition, the propulsion and support systems of electric vehicles such as eVTOL are powered by power batteries, and battery thermal management needs to be considered during the charging and discharging process of the power batteries; otherwise, battery thermal runaway may endanger the safety of the electric vehicle, passengers and the surrounding environment; and thermal management is important for achieving fast and efficient charging of power batteries.

[0004] How to better realize the thermal management coupling design of power batteries has become a technical problem that needs to be solved urgently. Utility Model Content

[0005] The main purpose of the utility model is to provide a charging plug, a charging gun and a connector assembly, aiming to improve the thermal management capability.

[0006] To achieve the above-mentioned purpose, the utility model provides a charging plug, which includes a plug body, and the end face of the plug body is provided with multiple charging terminals and multiple fluid interfaces, the plug body also defines a fluid channel and a fluid flow cavity, the fluid channel is used to connect to a cooling source; the fluid flow cavity is connected to the fluid channel and the fluid interface respectively, the fluid flow cavity is used for allowing the heat exchange fluid from the cooling source to flow through, and the fluid interface is used to connect to the cooling circuit of an external device.

[0007] In one embodiment, all of the charging terminals include at least a plurality of charging terminals to be cooled, and the charging plug further includes a plurality of charging harnesses, the number of the charging harnesses is consistent with the number of the charging terminals to be cooled and they are connected to each other in a one-to-one correspondence; at least one of a portion of the charging terminals to be cooled and a portion of the charging harnesses is disposed in the fluid flow cavity, and another portion of the charging terminals to be cooled passes through the end surface of the plug body to be exposed from the plug body.

[0008] In one embodiment, the plug body includes a plug shell and a plug core, and an axial end surface of a first shell end of the plug shell is provided with a receiving groove;

[0009] The plug inner core is movably arranged in the receiving groove along the axial direction of the plug shell, and a plurality of charging terminals are arranged on an end surface of the plug inner core away from the groove bottom wall of the receiving groove. The plug inner core and the plug shell jointly define the fluid flow cavity.

[0010] In one embodiment, another portion of the charging terminal to be cooled passes through an end surface of the plug core facing away from the groove bottom wall to be exposed from the plug core; another portion of the charging wiring harness passes through an end surface of the plug core facing the groove bottom wall of the accommodating groove to extend into the plug shell.

[0011] In one embodiment, the end surface of the plug inner core facing away from the bottom wall of the receiving groove includes a standard charging interface portion and an expansion area, and the expansion area is provided with a plurality of fluid interfaces connected to the fluid flow cavity;

[0012] All of the charging terminals to be cooled include a plurality of standard charging terminals, and at least some of the standard charging terminals are arranged in the standard charging interface portion.

[0013] In one implementation, the charging plug further includes a plurality of low-voltage emergency power terminals, and at least some of the low-voltage emergency power terminals are disposed in the expansion area.

[0014] In one implementation, the expansion area includes a first expansion area and a second expansion area, and the first expansion area and the second expansion area are symmetrically arranged on both sides of the standard charging interface portion;

[0015] Part of all the low-voltage emergency power supply terminals and part of all the fluid interfaces are arranged in the first extension area, and another part of all the low-voltage emergency power supply terminals and another part of all the fluid interfaces are symmetrically arranged in the second extension area.

[0016] In one embodiment, the fluid flow chamber is divided into a first fluid flow chamber and a second fluid flow chamber by a partition, and the flow directions of the heat exchange fluids in the first fluid flow chamber and the second fluid flow chamber are opposite, and at least a portion of the first fluid flow chamber is opposite to the first expansion area, and at least a portion of the second fluid flow chamber is opposite to the second expansion area.

[0017] In one embodiment, all the fluid interfaces connected to the first fluid flow cavity are used to connect to the liquid inlet end of the cooling circuit of the external device, and all the fluid interfaces connected to the second fluid flow cavity are used to connect to the liquid outlet end of the cooling circuit of the external device.

[0018] In one implementation, the first fluid flows through the cavity to define a first sub-cavity and a second sub-cavity, and the second fluid flows through the cavity to define a third sub-cavity and a fourth sub-cavity; wherein a portion of all the low-voltage emergency power supply terminals extends into the first sub-cavity, a portion of all the fluid interfaces communicate with the second sub-cavity, another portion of all the low-voltage emergency power supply terminals extends into the third sub-cavity, and another portion of all the fluid interfaces communicate with the fourth sub-cavity; or, the plug inner core and the plug outer shell further jointly define a first standard cavity and a second standard cavity, and on a radial plane of the plug inner core, the first standard cavity, the second fluid flows through cavity, the second standard cavity and the first fluid flows through cavity are sequentially distributed along the circumference of the plug inner core; The high-voltage DC positive terminal and the low-voltage auxiliary power supply positive terminal among the multiple standard charging terminals are all in the first fluid flow cavity and connected to the corresponding charging harness, and the high-voltage DC negative terminal and the low-voltage auxiliary power supply negative terminal among the multiple standard charging terminals are all in the second fluid flow cavity and connected to the corresponding charging harness; the charging plug also includes a first communication terminal, a second communication terminal, a first charging connection terminal, a second charging connection terminal and a grounding terminal, and the first communication terminal, the second communication terminal, the first charging connection terminal and the second charging connection terminal are all arranged at a position of the standard charging interface part facing the first standard cavity; the grounding terminal is arranged at a position of the standard charging interface part facing the second standard cavity.

[0019] In one embodiment, the fluid flows through the cavity which is divided into an independent loop connection cavity and a charging cooling cavity, and the loop connection cavity is connected to the fluid channel and the fluid interface respectively; at least one of a portion of the charging terminal to be cooled and a portion of the charging harness is arranged in the charging cooling cavity, and the charging cooling cavity is connected to the fluid channel.

[0020] In one implementation, a device cavity is further defined in the plug shell of the plug body, and the device cavity is arranged between the receiving groove of the plug body and the second shell end of the plug shell in the axial direction; the charging plug further includes:

[0021] A plurality of detection elements, wherein the detection elements are arranged in the plug inner core of the plug body or in the plug outer shell;

[0022] A control module, the control module is arranged in the device cavity, the control module is respectively connected to each of the detection elements for communication, and the control module has a plurality of status indicator lights;

[0023] An operating member, which is arranged on the outer peripheral wall of the plug housing. A part of the operating member penetrates through the side wall of the plug housing and extends into the device cavity to be connected to the control module; the operating member includes a touch screen and / or control buttons;

[0024] Wherein, a plurality of through holes are formed in the outer peripheral wall of the plug housing, and the through holes communicate with the device cavity. The number of the plurality of through holes is the same as the number of the plurality of status indicators and they correspond to each other one by one, so that each status indicator extends into the corresponding through hole and exposes from the corresponding through hole.

[0025] In one embodiment, a channel opening communicating with the fluid passage is formed in the bottom wall of the receiving groove;

[0026] The charging plug further includes a pipe joint, which protrudes from one end face of the plug inner core facing the bottom wall of the groove. The pipe joint communicates with the fluid flow cavity. The pipe joint includes a plurality of tapered portions sequentially connected along the protruding direction of the pipe joint, and in the protruding direction, the outer diameter of the tapered portion gradually decreases;

[0027] Wherein, the pipe joint is adapted to be inserted into the fluid passage from the channel opening, and the tapered portion is in interference fit with the fluid passage so that the fluid flow cavity is in sealed communication with the fluid passage.

[0028] In addition, the present invention also provides a charging gun, which includes a charging cable and the above-mentioned charging plug, and the wires in the charging cable are electrically connected to the charging terminals of the charging plug.

[0029] In addition, the present invention also provides a joint assembly, which includes a socket and the above-mentioned charging plug, and the socket is adapted to be plugged and matched with the charging terminals of the charging plug.

[0030] In one embodiment, the socket is adapted to extend into the receiving groove of the charging plug and be plugged and matched with the charging terminals.

[0031] In one embodiment, the joint assembly further includes:

[0032] A first mating structure and a second mating structure. The first mating structure is arranged on the radial outer side of the socket, and the second mating structure is arranged on the outer peripheral wall of the plug housing of the plug body. The first mating structure and the second mating structure are detachably mated;

[0033] The third matching structure and the fourth matching structure, the third matching structure is arranged at the plugging slot of the socket, the fourth matching structure is arranged at the receiving slot of the plug shell of the plug body, and the third matching structure and the fourth matching structure can be matched detachably.

[0034] In one embodiment, the first matching structure is configured as a snap hook, and the snap hook is fixedly disposed on the outer peripheral wall of the socket;

[0035] The second matching structure is configured as a buckle member, the buckle member is rotatably connected to the outer peripheral wall of the plug housing, and the buckle member is suitable for being hooked on the buckle hook.

[0036] In one embodiment, the fourth matching structure is configured as a locking hole opened on the outer peripheral wall of the plug housing, and the locking hole is communicated with the receiving groove;

[0037] The third matching structure includes:

[0038] A locking tongue, the locking tongue being arranged in the plug slot of the socket and being configured to be movable between an extended position and a retracted position, wherein the locking tongue is adapted to extend into the locking hole in the extended position and the locking tongue is retracted from the plug housing in the retracted position;

[0039] A position switching component is disposed in the plug slot, and is suitable for driving the locking tongue to move from the avoidance position to the extended position when the plug inner core of the plug body is plugged into the plug slot.

[0040] In one embodiment, the locking tongue comprises a first matching hole and a second matching hole which are sequentially opened and connected to each other in a direction from the radial inner side to the radial outer side of the plug-in slot, and in a width direction of the locking tongue, a size of the first matching hole is smaller than a size of the second matching hole;

[0041] The position switching component comprises:

[0042] A seat body, the seat body is arranged in the plug-in slot, a side wall of the seat body facing the opening of the plug-in slot is provided with a rod movable hole, the seat body is also provided with a lock tongue movable hole, when the inner core of the plug is plugged into the plug-in slot, the lock tongue movable hole and the lock hole are directly opposite to each other, and the seat body is also defined with a component accommodating cavity which is respectively connected with the rod movable hole and the lock tongue movable hole; wherein the lock tongue can be slidably assembled in the lock tongue movable hole;

[0043] A limit rod, wherein the limit rod is movably arranged in the rod movable hole along the depth direction of the plug-in slot, and one end of the limit rod extends from the rod movable hole to protrude from a side wall of the seat body facing the opening of the plug-in slot, and in the insertion direction of the plug-in slot, the limit rod comprises a small diameter portion and a large diameter portion arranged in sequence, the outer diameter of the large diameter portion is larger than the outer diameter of the small diameter portion, and the limit rod has a limit position and a trigger position, in the limit position, the large diameter portion is matched with the second matching hole, and in the trigger position, the small diameter portion is matched with the first matching hole;

[0044] a second elastic member, the second elastic member being disposed in the component accommodating cavity, the two ends of the second elastic member being respectively connected to the seat body and the locking tongue, and the second elastic member normally driving the locking tongue to move toward the extended position;

[0045] A third elastic member is disposed in the component accommodating cavity, two ends of the third elastic member are respectively connected to the seat body and the limiting rod, and the third elastic member often drives the limiting rod to move toward the trigger position.

[0046] In one embodiment, a boss is protruding from an end surface of the plug inner core away from the bottom wall of the receiving groove;

[0047] Wherein, the limiting rod is suitable for stopping at the boss when the inner core of the plug is plugged into and matched with the plug slot.

[0048] In one embodiment, a standard DC charging interface is provided in the plug slot of the socket, and the connector assembly includes at least two fourth matching structures, which are arranged on the outside of the standard DC charging interface and are spaced apart from each other.

[0049] The fluid channel defined by the charging plug provided by the technical solution of the utility model is used to connect to the cooling source, and the fluid flows through the cavity to connect the fluid channel and the fluid interface respectively, so that it can be conveniently and quickly connected to the cooling circuit of external equipment such as electric vehicles through the fluid interface on the charging plug, thereby efficiently performing thermal management for the power battery pack of the external equipment waiting for cooling components, thereby improving the thermal management capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0051] Figure 1 Schematic diagram of the structure of an embodiment of the charging plug provided by the present utility model;

[0052] Figure 2 Cross-sectional view of the inner core of the plug in a connected position in an embodiment of the charging plug provided by the present utility model;

[0053] Figure 3 Schematic diagram of the handle in an embodiment of the charging plug provided by the present utility model;

[0054] Figure 4 Schematic diagram of the cooperation between the handle and the handle chute in an embodiment provided by the present utility model;

[0055] Figure 5 Schematic diagram of the internal space of the charging plug in an embodiment provided by the present utility model;

[0056] Figure 6 Schematic diagram of the internal space of the charging plug in another embodiment provided by the present utility model;

[0057] Figure 7 Schematic diagram of the inner core of the plug in an embodiment provided by the present utility model;

[0058] Figure 8 For Figure 7 Cross-sectional view at position B-B in;

[0059] Fig. 9 For Figure 7 Cross-sectional view at position A-A in;

[0060] Fig.10 Partial structural schematic diagram in the top view direction of an embodiment of the charging plug provided by the present utility model;

[0061] Fig.11 Functional and communication connection schematic diagram of the control module in an embodiment of the charging plug provided by the present utility model;

[0062] Fig.12 Schematic diagram of the structure of an embodiment of the joint assembly provided by the present utility model;

[0063] Fig.13 End face schematic diagram of the socket in an embodiment of the joint assembly provided by the present utility model;

[0064] Fig.14 Schematic diagram of the position switching assembly of the socket in an embodiment of the joint assembly provided by the present utility model;

[0065] Fig.15 Schematic diagram of the locking tongue of the position switching assembly in an embodiment of the joint assembly provided by the present utility model;

[0066] Fig.16 Schematic diagram of the cooperation between a socket and a standard charging gun in an embodiment of the joint assembly provided by the present utility model.

[0067] Explanation of the reference numerals in the drawings:

[0068] 100. Charging plug; 110. Plug housing; 111. Accommodating groove; 112. Device cavity; 113. Cable integrated head; 114. Water pipe; 115. Operating member; 116. Status indicator light; 120. Plug inner core; 122. Fluid interface; 121. Fluid flow-through cavity; 121a. First fluid flow-through cavity; 121a1. First sub-cavity; 121a2. Second sub-cavity; 121b. Second fluid flow-through cavity; 121b1. Third sub-cavity; 121b2. Fourth sub-cavity; 121c. First standard cavity; 121d. Second standard cavity; 123. Handle chute; 124. Standard charging interface part; 125a. First extended area; 125b. Second extended area; 126. Pipe joint; 127. Y-shaped pipe; 128. Boss; 129. Inner core pressure relief port; 130. First elastic member; 140. Handle; 141. Intermediate pressure relief channel; 142. Sliding part; 143. Handle pressure relief port; 144. Housing pressure relief port; 145. Connecting pipe; 150. Low-voltage emergency power supply terminal; 200. Socket; 210. Insertion slot; 220. Standard DC charging interface; 230. Fluid slot; 240a. First extended mating area; 240b. Second extended mating area; 310. Clamping hook; 320. Clamping member; 330. Lock hole; 341. Seat body; 3411. Component installation groove; 342. Limit rod; 3421. Small-diameter part; 3422. Large-diameter part; 343. Lock tongue; 3431. Second mating hole; 3432. First mating hole; 344. Third elastic member; 345. Second elastic member.

[0069] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0070] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0071] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0072] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0073] New energy vehicles, eVTOL (Electric Vertical Takeoff and Landing), new energy ships and other electric vehicles that use electricity as the main power are equipped with a charging socket that cooperates with a charging plug. When the charging plug and the charging socket are matched, the multiple charging terminals on the charging plug are respectively matched with the corresponding sockets on the charging socket.

[0074] Taking eVTOL as an example, the power battery needs to be restored to the specified power before each flight. In addition, the propulsion and support systems of electric vehicles such as eVTOL are powered by power batteries, and battery thermal management needs to be considered during the charging and discharging of power batteries; otherwise, battery thermal runaway may endanger the safety of electric vehicles, passengers and the surrounding environment; and thermal management is important for achieving fast and efficient charging of power batteries.

[0075] To this end, the present application provides a solution to improve thermal management capabilities.

[0076] The technical concept of the present utility model is further described below in conjunction with some specific embodiments.

[0077] See also Figure 1 and Figure 2, the charging plug 100 provided by the present utility model includes a plug body. The plug body may include an independently provided plug housing 110 and a plug inner core 120. Of course, the plug body may also be provided as an integrally formed housing structure. For example, it may include an integrally formed plug housing and plug inner core, or the side wall of the plug inner core has through holes but the through holes are covered by the plug housing when connected to the plug housing. A plurality of charging terminals and a plurality of fluid interfaces 122 are provided on the end face of the plug body. For example Figure 1 the above-mentioned charging terminals and fluid interfaces 122 are provided on the upper end face of the plug body. The plug body also defines a fluid channel and a fluid flow-through cavity 121. The fluid channel is used to connect to a cooling source. The cooling source may be a storage device storing a coolant such as insulating coolant, and the cooling source may be placed on the ground.

[0078] The fluid flow-through cavity 121 is respectively communicated with the fluid channel and the fluid interface 122. The fluid flow-through cavity 121 is used for the heat exchange fluid from the cooling source to flow through. The fluid interface 122 is used to connect to the cooling circuit of an external device. For example, the fluid interface 122 may connect to a cooling circuit for cooling the power battery of an electric vehicle such as an eVTOL. All the charging terminals at least include a plurality of charging terminals to be cooled. It can be understood that at least some of the charging electrons are set as charging terminals to be cooled, so as to be cooled by subsequent structures.

[0079] In the above embodiment, the fluid channel defined by the charging plug 100 is used to connect to a cooling source, and the fluid flow-through cavity is respectively communicated with the fluid channel and the fluid interface, so that it can be conveniently and quickly connected to the cooling circuit of an external device such as an electric vehicle through the fluid interface 122 on the charging plug 100, so as to efficiently perform thermal management on the cooling components such as the power battery pack of the external device, and improve the thermal management ability.

[0080] In addition, the charging plug 100 may further include a plurality of charging wire harnesses. The number of the charging wire harnesses is the same as the number of the charging terminals to be cooled and they are connected to each other in one-to-one correspondence; at least one of a part of the charging terminals to be cooled and a part of the charging wire harnesses is arranged in the fluid flow-through cavity. For example, a part of the cooling charging terminals is arranged in the fluid flow-through cavity, a part of the charging wire harnesses is arranged in the fluid flow-through cavity, or both a part of the charging terminals to be cooled and a part of the charging wire harnesses are arranged in the fluid flow-through cavity. This embodiment does not limit this. In addition, the other part of the charging terminals to be cooled penetrates through the end face of the plug body to expose from the plug body, for example, expose from the upper side in the figure, so as to facilitate electrical connection for charging.

[0081] In this embodiment, the number of charging harnesses is consistent with the number of charging terminals to be cooled in the charging terminal and they are connected one-to-one. At least one of a portion of the charging terminal to be cooled and a portion of the charging harness is arranged in the fluid flow cavity 121, and the other portion of the charging terminal to be cooled passes through the end surface of the plug body to be exposed from the plug body, so that the charging plug 100 can charge external equipment such as electric vehicles conveniently and quickly through the charging terminal, and can cool the charging terminal to be cooled or the charging harness near the plug position through the fluid flow cavity 121, which is beneficial to increase the overall charging current or charging power and reduce the charging time.

[0082] In order to make eVTOL lighter and improve the overall integration and performance of eVTOL, decoupling the thermal management of eVTOL into an airborne passive thermal management system (relying on the temperature difference range created by heat capacity and ground temperature regulation) and a ground active thermal management system is currently a more feasible solution. Therefore, a thermal management interface is required on the eVTOL. The ground active thermal management system is connected to the eVTOL through the thermal management interface to establish a heat exchange fluid delivery channel and provide the corresponding heat exchange fluid to the eVTOL. Specifically, the thermal management interface can be constructed as a socket, and the ground active thermal management system has a corresponding charging plug structure. Of course, the charging plug structure needs to have a corresponding pressure relief design so that after the ground active thermal management system is connected to the eVTOL, the heat exchange fluid delivery channel can be relieved when pressure abnormalities or blockages occur. This may cause damage to the cooling circuit of external equipment such as electric vehicles, and may endanger the corresponding power batteries and even transportation equipment.

[0083] It is understandable that when the charging plug 100 is connected to the cooling circuit of an electric vehicle such as an eVTOL, due to the reasons that the overall length of the cooling circuit is relatively long, the pipe diameter is relatively small relative to the overall length, the total amount of coolant flowing is relatively large, and the pressure difference between the cooling source and the cooling circuit is relatively large, when the cooling circuit is connected to the charging plug 100, there is a greater risk of liquid circuit blockage and generation of instantaneous high pressure.

[0084] Therefore, the plug body can also define a body pressure relief channel, which is connected to the fluid flow cavity and is configured to be openable and closable. A pressure relief valve assembly can be provided on the body pressure relief channel, and the pressure relief valve assembly is used to enable the body pressure relief channel to be opened and closed to achieve opening and closing; of course, a movable baffle structure can also be provided at the inlet and outlet positions of the body pressure relief channel, so that the body pressure relief channel can be opened and closed by the relative movement of the baffle structure, and this embodiment does not limit this.

[0085] In this embodiment, the body pressure relief channel on the plug body is connected to the fluid flow cavity, and the body pressure relief channel is configured to be openable and closable, so that when the fluid path of the cooling circuit including the fluid channel, the fluid flow cavity, the fluid interface and the external device is blocked or forms an instantaneous high pressure, the pressure can be released by opening the body pressure relief channel, thereby reducing the risk of damage to the cooling circuit of the charging plug 100 and the external device.

[0086] Reference Figure 2 and Figure 3 In some embodiments, the plug body may be configured to include a plug shell 110 and a plug core 120. A receiving groove 111 is provided on the end face of the first shell end of the plug shell 110 in the axial direction, and at least one shell pressure relief port 144 is provided on the groove wall of the receiving groove 111. A fluid channel communicating with the receiving groove 111 and a shell pressure relief channel communicating with the shell pressure relief port 144 are defined in the plug shell 110. In this case, the body pressure relief channel includes the shell pressure relief channel; the plug core 120 is movably disposed in the receiving groove 111 along the axial direction of the plug shell 110, and a plurality of charging terminals are provided on the end face of the plug core 120 that is away from the bottom wall of the receiving groove 111; refer to Figure 3 and Figure 4 , at least one inner core pressure relief port 129 is provided on the side wall of the plug inner core 120 opposite to the outer shell pressure relief port 144, and the number of the inner core pressure relief ports 129 and the outer shell pressure relief ports 144 are the same and correspond to each other one by one; Figure 2 The plug inner core 120 and the plug outer shell 110 jointly define the above-mentioned fluid flow cavity, for example, the plug inner core 120 may define a fluid flow cavity 121 that is connected to the inner core pressure relief port 129, and the fluid flow cavity 121 is sealed and connected to the fluid channel, for example, it may be a sealed movable connection. The plug inner core 120 has a communication position that makes each inner core pressure relief port 129 respectively opposite to the corresponding outer shell pressure relief port 144 and connected to each other; wherein the above-mentioned plug body may include a first elastic member 130, the first elastic member 130 is arranged in the receiving groove 111, and the two ends of the first elastic member 130 are respectively connected to the plug inner core 120 and the plug outer shell 110, and the first elastic member 130 often drives the plug inner core 120 away from the communication position. Among them, the fluid flows through the cavity 121 and the fluid channel and is sealed and movably connected, which can be understood as: the fluid flows through the cavity 121 and the fluid channel can maintain a seal to prevent leakage of the heat exchange fluid, and the plug inner core 120 and other structures where the fluid flows through the cavity 121 and the plug shell 110 and other structures where the fluid channel is located can move relatively, for example, can move relatively along the up and down directions in the figure.

[0087] Specifically, the plug housing 110 is an axial structure, and the outer contour of its radial cross section can be a circle, a triangle, or a polygon such as a rectangle, which is not limited in this embodiment. The following description takes a rectangle as an example. The first housing end of the plug housing 110 in the axial direction, that is, the housing end that is connected to the socket 200 (see Fig.12 ) is provided with a receiving groove 111 on the end surface of one end that matches. The receiving groove 111 extends along the axial direction of the plug housing 110 toward the second housing end of the plug housing 110 in the axial direction. The second housing end of the plug housing 110 is connected to the pipeline to receive the heat exchange fluid such as the coolant transported by the pipeline. A fluid channel is defined in the plug housing 110 for the heat exchange fluid to continue to flow.

[0088] Reference Figure 1 The plug inner core 120 is an axial structure, which is movably assembled in the receiving groove 111 along the axial direction of the plug housing 110. The plug inner core 120 is connected to the plug groove 210 of the socket 200 (see Fig.12 and Fig.14 ) The plug-in mating part, that is, the plug inner core 120 defines a fluid flow chamber 121. The fluid flow chamber 121 is sealed and movably connected to the fluid channel, so that the heat exchange fluid in the fluid channel continues to flow into the fluid flow chamber 121. When the plug inner core 120 is plugged into the socket 200, the fluid interface on the upper end surface of the plug inner core 120 is connected to the fluid slot 230 on the socket 200 (see Fig.13 ) to establish a corresponding heat exchange fluid delivery channel. In addition, when the plug inner core 120 is plugged into the socket 200, various charging terminals are plugged into corresponding slots on the socket 200.

[0089] For ease of understanding, the following description is based on the direction from the second housing end to the first housing end of the plug housing 110 as the upper direction. At this time, the first housing end of the plug housing 110 is the upper end of the plug housing 110, and the second housing end of the plug housing 110 is the lower end of the plug housing 110. Similarly, the end of the plug inner core 120 facing the groove bottom wall of the receiving groove 111 (the groove wall opposite to the opening of the receiving groove 111) is the lower end of the plug inner core 120, and the end of the plug inner core 120 facing away from the groove bottom wall of the receiving groove 111 is the upper end of the plug inner core 120.

[0090] It should be noted that the matching relationship between the receiving slot 111 and the socket 200 includes at least the following two situations:

[0091] (1) When the plug inner core 120 is plugged into the socket 200, the plug outer shell 110 covers the socket 200 through the receiving groove 111. That is, the socket 200 is inserted into the receiving groove 111. It is not difficult to see that in this case, the charging plug and the socket 200 are more closely matched.

[0092] (2) When the plug core 120 is plugged into the socket 200, the upper end surface of the plug core 120 extends from the opening of the receiving groove 111, thereby protruding from the upper end surface of the plug shell 110. At this time, the socket 200 does not extend into the receiving groove 111. It is not difficult to see that compared with the first case, the size and volume of the charging plug is smaller.

[0093] In addition, in order to reduce the size of the charging plug and avoid wasting the internal space of the charging plug 100, on the radial plane of the plug shell 110, the shape of the inner contour of the receiving groove 111 is consistent with the outer contour of the plug core 120, and the size between the two can meet the clearance fit to facilitate the plug core 120 to slide smoothly in the receiving groove 111.

[0094] The groove wall of the receiving groove 111 is provided with at least one shell pressure relief port 144. Correspondingly, the side wall of the plug inner core 120 opposite to the shell pressure relief port 144 is provided with at least one inner core pressure relief port 129, and the number of inner core pressure relief ports 129 and the shell pressure relief ports 144 are the same and correspond to each other.

[0095] As an option of this embodiment, the shell pressure relief port 144 is opened on the bottom wall of the receiving groove 111, and correspondingly, the inner core pressure relief port 129 is opened on the lower end surface of the plug inner core 120. Alternatively, as another option of this embodiment, the shell pressure relief port 144 is opened on the groove side wall of the receiving groove 111, and correspondingly, the inner core pressure relief port 129 is opened on the inner core outer peripheral wall of the plug inner core 120. Alternatively, as another option of this embodiment, part of the multiple shell pressure relief ports 144 are opened on the groove side wall of the receiving groove 111, and another part is opened on the bottom wall of the receiving groove 111, and correspondingly, part of the multiple inner core pressure relief ports 129 are opened on the lower end surface of the plug inner core 120, and another part is opened on the inner core outer peripheral wall.

[0096] See also Figure 2 , Figure 3 and Figure 4 , the plug inner core 120 is designed with a connection position in the moving stroke of the receiving groove 111. At the connection position, each inner core pressure relief port 129 is respectively opposite to the corresponding outer shell pressure relief port 144 and connected to each other. It can be seen that during the axial movement of the plug inner core 120 in the receiving groove 111 along the plug outer shell 110, when the plug inner core 120 is in a non-connected position, each inner core pressure relief port 129 is not opposite to and / or connected to the corresponding outer shell pressure relief port 144. Obviously, when the inner core pressure relief port 129 is connected to the outer shell pressure relief port 144, the outer shell pressure relief channel is connected to the fluid flow cavity inside the plug inner core 120, and at this time, the fluid flow cavity can be depressurized through the outer shell pressure relief channel. When the inner core pressure relief port 129 is not connected to the outer shell pressure relief port 144, the fluid flow cavity 121 is not connected to the outer shell pressure relief channel.

[0097] At least one first elastic member 130 is provided in the receiving groove 111, which is used to always drive the plug inner core 120 away from the connection position. In this way, when the plug inner core 120 is not plugged into the socket 200, the first elastic member 130 drives the plug inner core 120 away from the connection position. In the process of plugging the plug inner core 120 into the charging plug, the staff does work to overcome the elastic potential energy of the first elastic member 130, so that the plug inner core 120 can be moved to the connection position.

[0098] It is not difficult to see that in this embodiment, the pressure relief channel is adjustable to open and close, and when the charging plug 100 is not plugged into the socket 200, the shell pressure relief port 144 is misaligned with the inner core pressure relief port 129, and the pressure relief channel is not connected. In this way, when the air tightness test is performed on the channel where the heat exchange fluid flows, such as the fluid flow cavity 121 in the charging plug, the test error caused by the connection of the pressure relief channel can be avoided.

[0099] It can be understood that the connection position can be located in the middle of the travel of the plug core 120 in the receiving groove 111. At this time, the first elastic member 130 can drive the plug core 120 away from the connection position in a direction away from the groove bottom wall of the receiving groove 111, and can also drive the plug core 120 away from the connection position in a direction close to the groove bottom wall of the receiving groove 111. Of course, when the charging plug 100 is plugged into the socket 200, the socket 200 will force the plug core 120 to approach the groove bottom wall of the receiving groove 111. Therefore, please refer to Figure 2 In one embodiment, the connection position is the end position of the travel of the plug core 120 in the receiving groove 111, moving toward the bottom wall of the receiving groove 111, and the first elastic member 130 often drives the plug core 120 away from the connection position in the direction away from the bottom wall of the receiving groove 111.

[0100] Specifically, the plug core 120 is close to the opening of the receiving groove 111 at the stroke starting position of the receiving groove 111, and then moves inward along the insertion direction of the receiving groove 111 until its stroke end position. In this way, when the staff pushes the plug shell 110 to overcome the elastic potential energy of the first elastic member 130 and completes the plugging of the socket 200 and the plug core 120, the plug core 120 will stay at its stroke end position relative to the receiving groove 111, that is, without damaging the charging plug 100, no matter how much force the staff applies, the plug core 120 will not continue to move further along the insertion direction of the receiving groove 111 (from top to bottom). The plug core 120 at the stroke end position is also in the connection position, so that when the plug core 120 and the plug slot 210 of the socket 200 are plugged in, the plug core 120 moves synchronously to the connection position to connect the shell pressure relief port 144 and the core pressure relief port 129, thereby facilitating the operation of the staff and improving the operation efficiency.

[0101] It should be noted that the inner core pressure relief port 129 and the outer shell pressure relief port 144 are relative and connected to each other, and one of them can be provided with a pressure relief valve such as a one-way valve or a two-way valve, and the above-mentioned pressure relief valve assembly can include at least one such pressure relief valve. When the inner core pressure relief port 129 and the outer shell pressure relief port 144 are relative to each other, the spacing meets the requirements, and the internal pressure meets the requirements, the pressure relief valve is turned on. For example, when the outer shell pressure relief port 144 is opened on the bottom wall of the accommodating groove 111 and the inner core pressure relief port 129 is opened on the lower end surface of the plug inner core 120, the outer shell pressure relief port 144 and the inner core pressure relief port 129 are close to or away from each other in the axial direction of the plug shell 110. When the two are close to each other until they are connected, the outer shell pressure relief port 144 is connected to the inner core pressure relief port 129, and the pressure relief valve is turned on when the internal pressure meets the requirements. On the contrary, when the two are far away from each other and not connected, the pressure relief valve is difficult to be closed by the internal pressure, thereby preventing the heat exchange fluid at the shell pressure relief port 144 or the inner core pressure relief port 129 from leaking into the receiving groove 111. Alternatively, in one embodiment, the groove side wall of the receiving groove 111 is provided with a shell pressure relief port 144, and at least one inner core pressure relief port 129 is provided at a position where the inner core outer peripheral wall of the plug inner core 120 matches the groove side wall of the receiving groove 111.

[0102] At this time, when the plug inner core 120 slides in the receiving groove 111, the shell pressure relief port 144 and the inner core pressure relief port 129 move from being offset to being partially opposite to each other in the axial direction of the plug shell 110, and then to being directly opposite to each other. Specifically, in the non-connected position, the shell pressure relief port 144 is blocked by the outer peripheral wall of the plug inner core 120, and the inner core pressure relief port 129 is blocked by the groove side wall of the receiving groove 111. When the plug inner core 120 moves toward the connected position, the shell pressure relief port 144 and the inner core pressure relief port 129 begin to be partially connected, until the two are completely opposite to each other and connected to each other.

[0103] It is not difficult to see that in the present embodiment, the outer shell pressure relief port 144 is opened on the side wall of the receiving groove 111, and the inner core pressure relief port 129 is opened on the outer peripheral wall of the inner core. The two are naturally blocked when staggered, thereby reducing the risk of heat exchange fluid from the outer shell pressure relief port 144 and / or the inner core pressure relief port 129 leaking into the receiving groove 111, thereby making the internal structure of the charging plug simpler and more reliable.

[0104] The housing pressure relief port 144 is opened on the side wall of the receiving groove 111, so that the housing pressure relief channel is limited to the radial outside of the receiving groove 111, such as being buried in the plug housing 110 at the side wall of the receiving groove 111. However, it can be understood that this method will increase the wall thickness of the plug housing 110 to ensure the structural strength of the plug housing 110. Therefore, please refer to Figures 2 to 4In one embodiment, the charging plug 100 further includes a gripping member, which is fixedly disposed on the outer peripheral wall of the plug shell 110, and is provided with a handle pressure relief port 143. A portion of the gripping member close to the first shell end (e.g., the portion facing upward in the figure) extends into the accommodating groove 111 and is provided with a shell pressure relief port 144. An intermediate pressure relief channel 141 is defined in the gripping member, and the intermediate pressure relief channel 141 is connected to both the shell pressure relief port 144 and the handle pressure relief port 143; wherein, the handle pressure relief port 143 is connected to the shell pressure relief channel.

[0105] Specifically, the gripping member is a handle or a grip provided on the plug housing 110, which facilitates the staff to hold the plug housing 110 and push the charging plug into the socket 200. It can be understood that, in order to facilitate the staff to apply force, multiple handles can be symmetrically provided, or multiple handles can be evenly spaced along the circumference of the housing of the charging plug 100.

[0106] See also Figures 2 to 4 The handle is arranged along the axial direction of the plug housing 110, with its upper end close to the upper end of the plug housing 110 and its lower end close to the lower end of the plug housing 110. In order to facilitate the staff to hold, the middle part of the handle can be spaced apart from the outer peripheral wall of the plug housing 110.

[0107] An intermediate pressure relief channel 141 is defined in the handle, and a handle pressure relief port 143 communicating with the intermediate pressure relief channel 141 is formed at the lower end of the handle. The handle pressure relief port 143 is communicated with the housing pressure relief channel of the plug housing 110. Figure 3 , the handle pressure relief port 143 can be specifically opened at the lower end surface of the handle. At this time, the lower end surface of the handle can be tightly fitted to the outer peripheral wall of the plug shell 110 through fasteners such as screws, and the shell pressure relief channel extends to the position of the outer peripheral wall of the plug shell 110 that is opposite to the handle pressure relief port 143, so that the intermediate pressure relief channel 141 in the handle is connected with the shell pressure relief channel in the plug shell 110. Of course, the lower end of the handle can also pass through the outer peripheral wall of the plug shell 110 and enter the plug shell 110 so that the handle pressure relief port 143 is connected with the shell pressure relief channel. It is worth mentioning that the handle with the intermediate pressure relief channel 141 inside can be only one of the multiple handles, of course, it can also be multiple or all of them.

[0108] The upper end of the handle can extend to the receiving groove 111 and to between part of the outer peripheral wall of the plug inner core 120 and the groove side wall of the receiving groove 111, and a shell pressure relief port 144 is provided. In this way, in the radial inner side to the radial outer side of the charging plug 100, part of the outer peripheral wall of the plug inner core 120 and one side end surface of the upper end of the handle are opposite to each other and can slide relative to each other. Thus, the upper end of the handle replaces the groove side wall of the receiving groove 111 to cooperate with the plug inner core 120, and there is no need to provide a shell pressure relief port 144 in the plug shell 110.

[0109] It is not difficult to see that in the present embodiment, by designing a shell pressure relief port 144 which is adjustably matched with the inner core pressure relief port 129 of the plug inner core 120 on the handle, and making full use of the internal space of the handle to define an intermediate pressure relief channel 141 which is connected to the shell pressure relief channel, compared with the shell pressure relief port 144 being opened on the side wall of the accommodating groove 111, the structural strength of the plug shell 110 can be significantly improved, and the increase in the wall thickness and other dimensions of the plug shell 110 can be avoided.

[0110] See also Figures 2 to 4 as well as Figure 7 , Figure 8 In one embodiment, part of the surface of the outer peripheral wall of the inner core is recessed to form a handle groove 123, and the handle groove 123 extends along the axial direction of the plug shell 110 to the axial ends of the plug inner core 120, and the groove wall of the handle groove 123 is provided with an inner core pressure relief port 129; the portion of the gripping piece close to the first shell end (for example, the upward portion in the figure) extends into the accommodating groove 111 to form a sliding portion 142, and the sliding portion 142 can be slidably assembled in the handle groove 123.

[0111] Specifically, the surface of the portion of the outer circumferential wall of the plug inner core 120 that is not matched with the handle is closely attached to and slides relatively with the groove side wall of the receiving groove 111. The surface of the portion of the outer circumferential wall of the plug inner core 120 that is matched with the handle is recessed along the radial direction of the plug inner core 120 to form a handle slide groove 123 for the handle to slide. In the axial direction of the plug shell 110, both ends of the handle slide groove 123 extend to the two axial end surfaces of the plug inner core 120, namely, the upper end surface of the plug inner core 120 and the lower end surface of the plug inner core 120.

[0112] In addition, the upper end of the handle extends into the handle slide groove 123 to form a corresponding sliding portion 142 such as a slider, so that the handle can slide smoothly in the handle slide groove 123. In this way, a corresponding sliding space is separated for the handle in the space formed by the receiving groove 111, and the handle slides in the sliding space, which not only allows most of the surface of the plug inner core 120 to be in close contact with the groove side wall of the receiving groove 111 to improve the aesthetics, but also allows most of the outer peripheral wall of the plug inner core 120 to provide corresponding restraining force to make the movement of the plug inner core 120 in the receiving groove 111 more stable.

[0113] Of course, the cross-sectional shape of the sliding portion 142 is consistent with the cross-sectional shape of the handle sliding groove 123 , so that the sliding portion 142 and the handle sliding groove 123 can also slide relative to each other stably.

[0114] In addition, in order to further improve the movement stability between the sliding portion 142 and the handle sliding groove 123, in one embodiment, the sliding portion 142 is bent and extended toward the bottom wall of the receiving groove 111. In this way, the sliding portion 142 and the receiving groove 111 have a longer matching stroke and a larger matching area. In addition, the sliding portion 142 is bent and extended, so that the sliding portion 142 has a certain length in the receiving groove 111, so that the upper end of the handle can be more stably attached to or fixed in the plug housing 110, and the plug inner core 120 is prevented from being separated from the sliding portion 142 during the sliding process.

[0115] It can be understood that when the sliding portion 142 is constructed as a slider or the like, it has at least three sidewalls that are slidably matched with the handle slide groove 123, and the shell pressure relief port 144 can be provided on any of the three sidewalls. In one embodiment, the groove sidewall of the accommodating groove 111 has a matching area that matches with the sliding portion 142; the sidewall of the sliding portion 142 that is away from the matching area is provided with a shell pressure relief port 144, and the groove wall of the handle slide groove 123 that is opposite to the matching area is provided with an inner core pressure relief port 129.

[0116] Specifically, see Figure 3 and Figure 4 For any sliding part 142, the side surface of the sliding part 142 facing away from the plug inner core 120 is directly opposite to a part of the surface of the receiving groove 111, and the part of the surface is the matching area of ​​the groove side wall of the receiving groove 111 that matches with the sliding part 142. The side wall of the sliding part 142 facing away from the matching area is provided with a shell pressure relief port 144, and correspondingly, the side wall of the handle sliding groove 123 facing the matching area is provided with an inner core pressure relief port 129.

[0117] Compared with opening the inner core pressure relief port 129 on the left and right side walls of the handle slide groove 123 (on both sides of the matching area of ​​the sliding portion 142 and the accommodating groove 111), the inner core pressure relief port 129 is opened on the groove wall on one side of the matching area of ​​the handle slide groove 123, so that after the inner core pressure relief port 129 and the outer shell pressure relief port 144 are connected, when the fluid flows through the cavity 121 and flows along the established pressure relief channel, there are fewer winding parts and the flow path is smoother as a whole, thereby improving the pressure relief effect.

[0118] It is worth mentioning that the charging terminal can extend to the part of the plug inner core 120 where the fluid flow cavity is not opened. Or in one embodiment, a part of the above-mentioned charging terminal to be cooled is arranged in the fluid flow cavity 121, and another part of the charging terminal to be cooled passes through the end face of one end of the plug inner core 120 away from the bottom wall of the receiving groove 111 to be exposed from the plug inner core 120; a part of the above-mentioned charging harness is arranged in the fluid flow cavity 121 and connected to the corresponding charging terminal to be cooled, and another part of the charging harness sequentially passes through the end face of one end of the plug inner core 120 facing the bottom wall of the receiving groove 111 to extend into the plug shell 110. Among them, the fluid flow cavity 121 is for the insulating heat exchange fluid to flow through. Of course, the outer peripheral surface of the charging harness is usually provided with an insulating layer such as an insulating rubber layer, and the outer peripheral surface of the charging terminal can also be provided with an insulating layer. At this time, the fluid flow cavity 121 can be provided with more types of coolants.

[0119] In this embodiment, in order to achieve direct contact cooling of the charging terminal, the fluid flowing through the cavity 121 is an insulating heat exchange fluid. At least part of the multiple charging terminals required for charging are charging terminals to be cooled. The main body of the charging terminal to be cooled is located in the cavity 121 where the fluid flows and is in direct contact with the insulating heat exchange fluid, and its pin end is exposed from the upper end surface of the plug inner core 120. Each charging terminal to be cooled is connected to a corresponding charging harness. Most of the charging harness is located between the bottom wall of the accommodating groove 111 and the lower end surface of the plug shell 110. One end of the charging harness extends to the lower end surface of the plug shell 110 and is exposed to connect with the corresponding wire core in the cable. The other end of the charging harness passes through the bottom wall of the accommodating groove 111 and the lower end surface of the plug inner core 120 in sequence and extends to the fluid flow cavity 121 to connect with the corresponding charging terminal to be cooled.

[0120] It is not difficult to see that the charging plug 100 in this embodiment, while delivering a heat exchange fluid such as a coolant, also cools the charging terminals and charging harness to be cooled in the charging plug 100, so that this embodiment provides cooling measures for the key components of the charging plug 100 that generate heat during the charging process, thereby significantly improving the heating phenomenon of the key components during the charging process. In this way, through the cooling solution provided by this embodiment, the charging plug 100 can support a higher rate of charging power and reduce the charging time, that is, it can support faster fast charging technology.

[0121] In addition, in this embodiment, the insulating heat exchange fluid will directly contact the charging terminal to be cooled. Therefore, compared with the liquid cooling technology in the related technology, under the same power, since there is no need to design isolation measures (isolation of coolant and heat dissipation components), the charging plug is smaller in size and lighter in weight, achieving the purpose of lightweight design, saving other auxiliary materials, achieving better production cost control, and improving the convenience of personnel operation.

[0122] It is worth mentioning that when providing a charging function, the materials of the plug shell 110 and the plug core 120 should meet the requirements of insulation performance, flame retardancy, weather resistance, low-temperature toughness, etc. For example, one or more materials selected from PC (polycarbonate), ABS (acrylonitrile-butadiene-styrene copolymer), and PBT (polycarbonate / polybutylene terephthalate) can be used.

[0123] It is understandable that each region has corresponding standards for the interface layout of the charging plug 100. In order to adapt to such standards, in one embodiment, reference is made to Figure 1 and Fig. 9 The end surface of the plug core 120 that faces away from the bottom wall of the accommodating groove 111 includes a standard charging interface portion 124 and an expansion area, and the expansion area is provided with a plurality of fluid interfaces 122 that are connected to the fluid flow cavity; all charging terminals to be cooled include a plurality of standard charging terminals, and all or part of the standard charging terminals are arranged in the standard charging interface portion 124.

[0124] Specifically, the upper end surface of the plug inner core 120 includes a standard charging interface portion 124 and an expansion area. All or part of the standard charging terminals to be cooled are arranged in the standard charging interface portion 124 and arranged in accordance with the layout specified in the corresponding standards. It can be understood that at least part of the standard charging terminals are arranged in the standard charging interface portion 124 and arranged in accordance with the layout specified in the corresponding standards. Of course, the shape and size of the standard charging interface portion 124 are also implemented in accordance with the corresponding standards. The expansion area is located on one side of the standard charging structure area, and at least one of the non-standard charging terminals, the fluid interface 122 and the charging terminals that do not require cooling in the charging terminals to be cooled is arranged in the expansion area; of course, some standard charging terminals with standard shapes and sizes can also be arranged in the expansion area. The fluid interface 122 is connected to the fluid flow cavity 121, and is plugged and matched with the fluid charging plug on the socket 200, so that the heat exchange fluid such as the coolant in the fluid flow cavity 121 can be transported to the socket 200.

[0125] In this way, the charging plug 100 provided in this embodiment can be matched with a standard socket 200 to improve the adaptability of the charging plug 100 of this embodiment.

[0126] It is understandable that for electric vehicles such as eVTOL, their fuselages include not only main power sources such as power batteries, but also emergency low-voltage power sources. Generally speaking, the emergency low-voltage power source is a 28V low-voltage emergency battery, so that when the main power source of the eVTOL fails, the emergency low-voltage power source can quickly take over and provide the necessary power support for the key systems of the eVTOL (such as flight control systems, navigation systems, communication systems, etc.), ensuring that the eVTOL can land safely and stably. Generally speaking, when the emergency power source is not used for a long time, it should also be charged and discharged every once in a while (such as every three months) to maintain battery activity and extend its service life. In related technologies, the emergency low-voltage power source is usually charged by the relatively high-voltage power battery in the electric vehicle; however, the power battery may be too low in power, fail, or the charging line between the two may be damaged, which may cause the emergency low-voltage power source to fail to charge. Therefore, please refer to Figure 1 and Fig.10 In one embodiment, the charging plug 100 further includes a plurality of low-voltage emergency power terminals 150, and all or part of the low-voltage emergency power terminals 150 are arranged in the extension area, which can be understood as at least part of the low-voltage emergency power terminals 150 being arranged in the extension area. It can be understood that if part of the low-voltage emergency power terminals 150 are arranged in the standard charging interface portion 124, it is sufficient to avoid the low-voltage emergency power terminals 150 from causing connection interference to other standard charging terminals.

[0127] Of course, the corresponding socket 200 also has a corresponding low-voltage emergency charging socket, which cooperates with the low-voltage emergency power supply terminal 150 to establish a charging channel for the emergency low-voltage power supply.

[0128] In this way, after the charging plug 100 provided in this embodiment is connected to the socket 200, it can not only charge the main power supply, but also charge the emergency low-voltage power supply, thereby expanding the function of the charging plug 100 to reduce the steps of eVTOL ground maintenance. Of course, it can be understood that when the charging plug 100 is matched with the socket 200, whether the low-voltage emergency power supply terminal 150 is in operation can be controlled by the staff according to the work task.

[0129] In addition, the low-voltage emergency power terminal 150 can also provide a stable low-voltage power input during ground debugging, and serves as a ground power input interface.

[0130] In addition, all or part of the low-voltage emergency power supply terminals 150 are still arranged in the expansion area. In this way, the charging plug provided in this embodiment can not only charge the main power supply, but also charge the low-voltage emergency power supply, and can also be matched with the standard socket 200 to improve the adaptability of the charging plug 100 of this embodiment.

[0131] It should be noted that the low-voltage emergency power terminal 150 can extend into the fluid flow cavity 121 and directly contact with the insulating heat exchange fluid for cooling. Alternatively, since the low-voltage emergency power terminal 150 generates limited heat during operation, the low-voltage emergency power terminal 150 can also extend to a portion of the plug inner core 120 where the fluid flow cavity 121 is not provided, that is, the low-voltage emergency power terminal 150 and the corresponding charging harness are not immersed in cooling, thereby improving safety.

[0132] It can be understood that the relative position relationship between the standard charging interface portion 124 and the expansion area can be that the standard charging interface portion 124 is inside, and the expansion area surrounds the outside of the standard charging interface portion 124. Alternatively, the standard charging interface portion 124 and the expansion area can be arranged left and right. Alternatively, in one embodiment, refer to Fig.10 The expansion area includes a first expansion area 125 a and a second expansion area 125 b , and the first expansion area 125 a and the second expansion area 125 b are symmetrically arranged on both sides of the standard charging interface portion 124 .

[0133] Specifically, the standard charging interface portion 124 is located at the geometric center of the plug inner core 120, and the first expansion area 125a and the second expansion area 125b are symmetrically arranged on the left and right sides of the standard charging interface portion 124. Figure 1 In one example, the cross-sectional shape of the plug core 120 is roughly rectangular, the geometric center of the rectangle is a circular standard charging interface portion 124, and the two sides are respectively a first expansion area 125a and a second expansion area 125b.

[0134] At this time, a part of all low-voltage emergency power terminals 150 is arranged in the first expansion area 125a, and another part of all low-voltage emergency power terminals 150 is symmetrically arranged in the second expansion area 125b. Specifically, a part of all fluid interfaces 122 is arranged in the first expansion area 125a, and another part of all fluid interfaces 122 is symmetrically arranged in the second expansion area 125b.

[0135] When the symmetrical layout is performed, after the staff aligns the standard charging interface 124 with the corresponding area on the socket 200, the fluid interface 122 and the low-voltage emergency power supply terminal 150 can also be aligned at the same time. In this way, the upper end surface of the plug core 120 not only meets the standard requirements, but also improves the appearance of the charging plug and the efficiency of insertion through the symmetrical layout.

[0136] It should be noted that after the insulating heat exchange fluid enters the eVTOL or other electric vehicle through the fluid interface 122, it exchanges heat with the battery cells and other modules in the power battery. In order to achieve the set temperature control target, a large amount of insulating heat exchange fluid is required, and a large amount of insulating heat exchange fluid needs to be returned to the ground thermal management system after heat exchange. In this case, the insulating heat exchange fluid can leave the eVTOL or other electric vehicle through a dedicated return line and return to the ground thermal management system. Alternatively, please refer to Figure 5 , Figure 6 , Figure 7 and Figure 8 In one embodiment, the fluid flow chamber 121 is divided into a first fluid flow chamber 121a and a second fluid flow chamber 121b by a partition, and the flow directions of the insulating heat exchange fluid in the first fluid flow chamber 121a and the second fluid flow chamber 121b are opposite. At least part of the first fluid flow chamber 121a is opposite to the first expansion area 125a, and at least part of the second fluid flow chamber 121b is opposite to the second expansion area 125b.

[0137] In this way, the fluid flow through cavity 121 includes not only a liquid outlet channel for the insulating heat exchange fluid to enter the electric vehicle such as eVTOL, but also a liquid inlet channel for the insulating heat exchange fluid to return to the ground thermal management system. Of course, the first fluid flow through cavity 121a can be one of the liquid inlet channel and the liquid outlet channel, and the second fluid flow through cavity 121b can be the other of the liquid inlet channel and the liquid outlet channel.

[0138] In the related art, during the cooling process on the ground, since the fluid channel of the cooling circuit in the external equipment such as eVTOL is relatively long, and in order to speed up the cooling efficiency, the inlet temperature of the cooling circuit in the external equipment is usually relatively low, the temperature difference between the inlet and outlet positions of the battery system of the external equipment is relatively large during the cooling process. Correspondingly, in the above-mentioned embodiment, the charging plug can separate the fluid flow through the cavity 121 by a partition into the first fluid flow through the cavity 121a and the second fluid flow through the cavity 121b, and can switch the inlet and outlet directions by the first fluid flow through the cavity 121a and the second fluid flow through the cavity 121b, so that the internal temperature difference of the battery system of the external equipment corresponding to the charging plug can be greatly reduced by the timed switching of the inlet and outlet directions.

[0139] As an option of this embodiment, the first expansion area 125a is directly opposite to at least a portion of the first fluid flow chamber 121a, so that all low-voltage emergency power supply terminals in the first expansion area 125a extend into the first fluid flow chamber 121a, and all fluid interfaces 122 are in communication with the first fluid flow chamber 121a. The second expansion area 125b is directly opposite to at least a portion of the second fluid flow chamber 121b, so that all low-voltage emergency power supply terminals in the second expansion area 125b extend into the first fluid flow chamber 121a, and all fluid interfaces 122 are in communication with the second fluid flow chamber 121b.

[0140] It is worth mentioning that see Figure 5 , the insulating heat exchange fluid in the first fluid flowing through the cavity 121a and the second fluid flowing through the cavity 121b can be the insulating heat exchange fluid in the same closed-loop fluid circuit, such as the insulating heat exchange fluid in the first fluid flowing through the cavity 121a is the insulating heat exchange fluid in the inlet direction of the same closed-loop fluid circuit, and the insulating heat exchange fluid in the second fluid flowing through the cavity 121b is the insulating heat exchange fluid in the outlet direction of the same closed-loop fluid circuit. This structural method can reduce the complexity of the system structure, reduce the volume and weight of the connector and cable, and facilitate operation and maintenance.

[0141] Of course, since the charging terminal at the junction of the electrical connection generates a large amount of heat, if the insulating heat exchange fluid in the plug core 120 is in the same closed-loop fluid circuit, it may significantly affect the temperature of the insulating heat exchange fluid flowing through, thereby affecting the heat exchange effect of the insulating heat exchange fluid flowing into the eVTOL and other electric vehicles on the power battery. Therefore, please refer to Figure 6 As another option of this embodiment, the first fluid flows through the cavity 121a to define the first sub-cavity 121a1 and the second sub-cavity 121a2, and the second fluid flows through the cavity 121b to define the third sub-cavity 121b1 and the fourth sub-cavity 121b2; wherein, a portion of all low-voltage emergency power supply terminals extends into the first sub-cavity 121a1, a portion of all fluid interfaces 122 is communicated with the second sub-cavity 121a2, another portion of all low-voltage emergency power supply terminals extends into the third sub-cavity 121b1, and another portion of all fluid interfaces 122 is communicated with the fourth sub-cavity 121b2.

[0142] It is worth mentioning that, at this time, the first sub-cavity 121a1 and the second sub-cavity 121a2 can be connected to the same fluid channel, or they can be connected to the same but different fluid channels of the insulating heat exchange fluid, and this embodiment does not limit this. Similarly, the third sub-cavity 121b1 and the fourth sub-cavity 121b2 can be connected to the same fluid channel, or they can be connected to the same but different fluid channels of the insulating heat exchange fluid, and this embodiment does not limit this.

[0143] It can be understood that in the first fluid flow chamber 121a, the first sub-chamber 121a1 and the second sub-chamber 121a2 can be separated from each other left and right, or separated inside and outside, and this embodiment does not limit this. Similarly, the third sub-chamber 121b1 and the fourth sub-chamber 121b2 can be separated from each other left and right, or separated inside and outside, and this embodiment does not limit this. In addition, the first sub-chamber 121a1 and the second sub-chamber 121a2 are independent of each other. The first sub-chamber 121a1 is in the charging device circuit and is used to cool the corresponding low-voltage emergency power supply terminal, while the second sub-chamber 121a2 is in the battery pack cooling circuit and is a temporary storage place for the insulating heat exchange fluid in the liquid inlet direction (or liquid outlet direction) between the power battery and the ground thermal management system. Similarly, the third sub-chamber 121b1 and the fourth sub-chamber 121b2 are independent of each other. The third sub-chamber 121b1 is in the charging device circuit and is used to cool the corresponding low-voltage emergency power supply terminal, while the fourth sub-chamber 121b2 is in the battery pack cooling circuit and is a temporary storage place for the insulating heat exchange fluid in the liquid outlet direction (or liquid inlet direction) between the power battery and the ground thermal management system.

[0144] It is not difficult to see that the insulating heat exchange fluid that exchanges heat with the charging terminals and the charging harness flows in the charging device cooling circuit, and the insulating heat exchange fluid transported to the power battery flows in the battery pack cooling circuit. The two are relatively independent circuits. This structural method can reduce the mutual influence between the battery pack cooling circuit and the charging device cooling circuit, ensure the heat exchange effect of the insulating heat exchange fluid in each circuit, and can also independently control the cooling conditions of the battery pack and the charging device, increase the system control accuracy, and improve the system reliability and cooling efficiency.

[0145] Of course, in some embodiments, for the first fluid flow chamber 121a and the second fluid flow chamber 121b that are separated by partition structures such as partitions and are independent of each other, all fluid interfaces 122 connected to the first fluid flow chamber 121a can be used to connect to the liquid inlet end of the cooling circuit of the external device, and all fluid interfaces 122 connected to the second fluid flow chamber 121b can be used to connect to the liquid outlet end of the cooling circuit of the external device. Therefore, after the first fluid flow chamber 121a is connected to the external heat exchange fluid, the pressure of the external heat exchange fluid can be more applied to the cooling circuit of the external device, which is convenient for overcoming the flow resistance in the cooling circuit, and is conducive to the heat exchange fluid flowing through the first fluid flow chamber 121a, the cooling circuit of the external device, and the second fluid flow chamber 121b in an orderly manner, thereby reducing the risk of the heat exchange fluid flowing directly from the first fluid flow chamber 121a to the second fluid flow chamber 121b, which is conducive to improving the heat exchange efficiency. It can be understood that the multiple fluid interfaces 122 connected to the first fluid flow cavity 121a can be respectively connected to the liquid inlet ends of each cooling circuit on the external device, and the multiple fluid interfaces 122 connected to the second fluid flow cavity 121b can be respectively connected to the liquid outlet ends of each cooling circuit on the external device.

[0146] In addition, refer to Figure 8 A three-way pressure relief channel is also defined in the plug body, and specifically, a three-way pressure relief channel can be further defined in the plug inner core 120, and the above-mentioned body pressure relief channel includes the three-way pressure relief channel; a first end of the three-way pressure relief channel is connected to the first fluid flow chamber 121a, and a second end of the three-way pressure relief channel is connected to the second fluid flow chamber 121b; in addition, a third end of the three-way pressure relief channel can be connected to the above-mentioned inner core pressure relief port 129; the charging plug 100 also includes two pressure relief valves, one pressure relief valve is arranged at the first end, and the other pressure relief valve is arranged at the second end.

[0147] See also Figure 8 Specifically, the plug inner core 120 can separate a chamber between the first fluid flow chamber 121a and the second fluid flow chamber 121b and in an area corresponding to the inner core pressure relief port 129. A Y-shaped tube is installed in the chamber, and a pressure relief three-way channel is defined in the Y-shaped tube. The first end extends to communicate with the first fluid flow chamber 121a, the second end extends to communicate with the second fluid flow chamber 121b, and the third end extends to communicate with the inner core pressure relief port 129.

[0148] See also Figure 7 and Fig. 9 In order to facilitate smooth pressure relief, the central axis of each tube section of the Y-shaped tube is on the same radial plane of the plug inner core 120, and the central axis of the third end is collinear with the central axis of the inner core pressure relief port 129, so that in the axial direction of the plug shell 110, the Y-shaped tube and the inner core pressure relief port 129 are approximately at the same height, and the third end of the Y-shaped tube is directly opposite to the inner core pressure relief port 129. In this way, the insulating heat exchange fluid entering the pressure relief three-way channel from the second end or the first end can flow smoothly into the inner core pressure relief port 129.

[0149] It is worth mentioning that the pressure relief three-way channel is used only when an abnormal situation occurs in the delivery of the insulating heat exchange fluid. In order to avoid leakage of the insulating heat exchange fluid under normal circumstances, the charging plug 100 also includes two pressure relief valves, one pressure relief valve is arranged at the first end, and the other pressure relief valve is arranged at the second end. It can be understood that the pressure relief valve can be a one-way valve or a two-way valve, and this embodiment does not limit this.

[0150] In addition, the liquid inlet and outlet directions of the liquid inlet and outlet circuits of the charging plug can be switched, which can be understood as a symmetrical circuit. In this embodiment, the charging plug defines a three-way pressure relief channel in the plug inner core 120, which can meet the pressure relief requirements of different circuits when the liquid direction is switched, thereby improving the convenience of use of the charging plug.

[0151] It should be noted that when the charging plug 100 is used as a charging plug, especially when used as a fast charging plug, the heat generated by the standard charging terminal is also relatively large, so it is necessary to cool it. Figure 7 and Figure 8 In one embodiment, the plug core 120 and the plug shell 110 further define a first standard cavity 121c and a second standard cavity 121d together. For example, the plug core 120 further defines a first standard cavity 121c and a second standard cavity 121d. On a radial plane of the plug core 120, the first standard cavity 121c, the second fluid flow cavity 121b, the second standard cavity 121d, and the first fluid flow cavity 121a are sequentially distributed along the circumference of the plug core 120; the high-voltage DC positive terminal and the low-voltage auxiliary power positive terminal in the plurality of standard charging terminals are both connected to the corresponding charging harness in the first fluid flow cavity 121a, and the high-voltage DC negative terminal and the low-voltage auxiliary power positive terminal in the plurality of standard charging terminals are connected to the corresponding charging harness in the first fluid flow cavity 121a. The negative terminal of the pressure-assisted power supply is connected to the corresponding charging harness in the second fluid flow cavity 121b; the charging plug also includes a first communication terminal, a second communication terminal, a first charging connection terminal, a second charging connection terminal and a grounding terminal, and the first communication terminal, the second communication terminal, the first charging connection terminal and the second charging connection terminal are all arranged at the position of the standard charging interface part 124 facing the first standard cavity 121c; the grounding terminal is arranged at the position of the standard charging interface part 124 facing the second standard cavity 121d; wherein, the outer peripheral wall of the plug inner core 120 at the first standard cavity 121c is provided with an inner core pressure relief port 129, and a pressure relief three-way channel is defined in the first standard cavity 121c.

[0152] Specifically, taking the standard charging interface part 124 as a DC 9-pin layout area as an example, it includes DC power supply (DC+, DC-), common grounding (PE) for the car and the pile, message interaction communication (S+, S-), car and pile connection confirmation communication (CC1, CC2), low-voltage auxiliary power supply (A+, A-), a total of 9 standard charging terminals. Among them, the DC+ terminal is the high-voltage DC positive terminal, the A+ terminal is the low-voltage auxiliary power positive terminal, the A- terminal is the low-voltage auxiliary power negative terminal, and the DC- terminal is the high-voltage DC negative terminal. The PE terminal is the ground terminal, the S+ terminal is the first communication terminal, the S- terminal is the second communication terminal, the CC1 terminal is the first charging connection terminal, and the CC2 terminal is the second charging connection terminal.

[0153] The first fluid flow cavity 121a is not only opposite to the first expansion area 125a, but also opposite to the area where the DC+ terminal and the A+ terminal in the standard charging interface part 124 are located, so that the DC+ terminal and the A+ terminal are extended into the first fluid flow cavity 121a and connected to the corresponding charging harness. The second fluid flow cavity 121b is not only opposite to the first expansion area 125a, but also opposite to the area where the DC- terminal and the A- terminal in the standard charging interface part 124 are located, so that the DC- terminal and the A- terminal are extended into the second fluid flow cavity 121b and connected to the corresponding charging harness.

[0154] In this way, the charging plug 100 provided in this embodiment can also realize the cooling of DC high-voltage devices such as the DC+ terminal, A+ terminal, DC- terminal and A- terminal, and provide further cooling measures for the key components of the charging plug 100 that generate heat during the charging process, so as to significantly improve the heating phenomenon of the key components during the charging process. In this way, through the cooling solution provided in this embodiment, the charging plug 100 can support a higher rate of charging power and reduce the charging time, that is, it can support faster fast charging technology.

[0155] As for the S+ terminal, S- terminal, CC1 terminal, CC2 terminal and PE terminal, since the above-mentioned standard charging terminals do not generate heat significantly during charging, in order to avoid contact with the insulating heat exchange fluid and increase the risk of leakage, the above-mentioned terminals do not extend into the first fluid flow chamber 121a or the second fluid flow chamber 121b. In order to accommodate this part of the standard charging terminals in the plug core 120, the first standard chamber 121c and the second standard chamber 121d are defined in the plug core 120. Among them, in the axial direction of the plug core 120, the first standard chamber 121c is located directly below the S+ terminal, S- terminal, CC1 terminal and CC2 terminal, and the second standard chamber 121d is located directly below the PE terminal. It is worth mentioning that the first standard chamber 121c, the first fluid flow chamber 121a, the second standard chamber 121d, and the second fluid flow chamber 121b are all independent of each other, thereby realizing dry and wet isolation in the plug core 120 to improve the overall safety of the plug core 120.

[0156] In addition, the outer peripheral wall of the plug inner core 120 at the first standard cavity 121c is provided with an inner core pressure relief port 129, and a pressure relief three-way channel is defined in the first standard cavity 121c. At this time, the aforementioned Y-shaped tube is arranged in the first standard cavity 121c. Therefore, this embodiment integrates the Y-shaped tube into the first standard cavity 121c, thereby fully utilizing the space in the plug inner core 120. Of course, in other embodiments, a Y-shaped tube can also be arranged in the second standard cavity 121d, thereby establishing a pressure relief channel with the corresponding handle.

[0157] In some embodiments, the fluid flows through the cavity 121 and is divided into an independent loop connection cavity and a charging cooling cavity, which can be specifically separated by a partition component such as a partition plate; the loop connection cavity is connected to the fluid channel and the fluid interface 122 respectively, and the shell pressure relief channel is connected to the loop connection cavity; at least one of a part of the charging terminal to be cooled and a part of the charging harness is arranged in the charging cooling cavity, and the charging cooling cavity is connected to the fluid channel. In this embodiment, the heat exchange fluid such as the coolant in the loop connection cavity can independently perform thermal management on the external device through the cooling circuit of the external device, which is conducive to improving the accuracy of thermal management of the external device and improving the temperature uniformity of each position of the external device. In addition, the heat exchange fluid in the charging cooling cavity can independently dissipate heat from the charging terminal to be cooled or the charging harness to improve the heat dissipation efficiency.

[0158] See also Figure 1 and Figure 2 In one embodiment, a device cavity 112 is further defined in the plug shell 110. The device cavity 112 is disposed between the receiving groove 111 and the second shell end of the plug shell 110. The second shell end is at an end position in the axial direction of the plug shell 110, such as the lower end in the figure. The charging plug also includes a plurality of detection elements, a control module and an operating member 115. The detection element is disposed in the plug inner core 120 or the plug shell 110. The control module is disposed in the device cavity 112. The control module is respectively connected to each detection element in communication, and the control module has a plurality of status indicator lights 116. The operating member 115 is disposed on the outer peripheral wall of the plug shell 110. Part of the operating member 115 penetrates the side wall of the plug shell 110 and extends into the device cavity 112 to connect with the control module. The operating member 115 includes a touch screen and / or a control button.

[0159] Among them, the outer wall of the plug shell 110 is provided with multiple through holes, which are connected to the device cavity 112. The number of the multiple through holes is consistent with the number of the multiple status indicator lights 116 and corresponds to each other one by one, so that each status indicator light 116 extends into the corresponding through hole and emerges from the corresponding through hole.

[0160] Specifically, the plug core 120 may be equipped with detection elements such as flow sensors, pressure sensors, and temperature sensors, which are used to detect parameters such as flow, pressure, and temperature of the fluid flowing through the cavity. The plug housing 110 may also be equipped with detection elements such as ammeters or voltmeters.

[0161] The upper portion of the plug housing 110 defines the aforementioned receiving groove 111, and the lower portion of the plug housing 110 defines the device cavity 112. Of course, the receiving groove 111 and the device cavity 112 can also communicate with each other. The control module in the device cavity 112 can be constructed as an integrated control board, and the corresponding modules are arranged on the integrated control board to realize communication with the ground charging thermal management device and the eVTOL and some functional control operations. Please refer to Fig.11 The specific content of the communication includes but is not limited to: inlet and outlet liquid pressure, inlet and outlet liquid temperature, flow rate, liquid circuit connection status, charging status, discharging status, battery status information, fault or alarm information, historical log, thermal management strategy identification, environmental information, etc. Functional control operations include but are not limited to emergency stop (charging and discharging stop, liquid and air inlet stop, etc.), information query (connection status confirmation, battery information query, fault and alarm information query, etc.), communication connection operation (Bluetooth, LAN, etc. connection) and other functions.

[0162] Thus, the ground thermal management system and the eVTOL complete the communication connection (cable connection) through the connection between the charging plug 100 and the socket 200. The eVTOL communication content includes flight logs, battery status information (including but not limited to total battery voltage, battery cell voltage, charge and discharge current, battery temperature, battery operation data, control device switch status, etc.), equipment status information (including but not limited to airborne ground power supply equipment, airborne ground thermal management equipment, etc.), and at the same time, the parameter information collected by the aforementioned flow sensors, pressure sensors, temperature sensors and other detection elements is also uploaded to the ground thermal management system and eVTOL through the communication bus.

[0163] It is understandable that the ground thermal management system can collect ground energy storage status information (including but not limited to energy storage system power, energy storage system output power, energy storage system output current, energy storage system control device switch status, etc.), charging and discharging parameters (including but not limited to charging current, charging power, expected charging time, etc.) and equipment status information, thermal management parameters and equipment status information (including but not limited to cooling and heating power, output flow, inlet and outlet liquid temperature, target temperature value, etc.), equipment operation log (including operation time, historical data, fault and alarm information, etc.). Then, when the ground thermal management system and eVTOL are docked, they can transmit the aforementioned status information to the cloud server through wired, wireless, Bluetooth, local area network, etc. for storage or reading.

[0164] The control module can display the parameter information collected by the aforementioned flow sensor, pressure sensor, temperature sensor and other detection elements through multiple status indicator lights 116 on the charging plug 100. Of course, the plug housing 110 can also be provided with a status indicator light 116 for displaying information such as whether the charging and discharging status is normal, whether the communication with the eVTOL or the ground thermal management system is normal, etc. In one example, the status indicator light 116 includes but is not limited to a high-voltage charging indicator light, a 28V charging indicator light, a communication indicator light, and a thermal management status indicator light. In addition, the plug housing 110 is also provided with operating parts 115 such as a touch screen, a control button, and a control knob, and different operating parts 115 are configured with corresponding functions. In one example, the operating parts include but are not limited to a communication button and an emergency stop button. The staff can perform corresponding operations through the operating part 115.

[0165] During ground charging, discharging and thermal management operations, since the ground thermal management system is far away from the eVTOL docking location, when an abnormal state occurs between the charging plug 100 and the socket 200, it is impossible to promptly notify the ground thermal management system operator, or it is impossible to promptly move to the ground equipment operating console to stop charging, discharging or thermal management. Therefore, after the operator completes the docking of the charging plug 100 and the socket 200, during ground charging, discharging or thermal management operations, the operator can observe the operating status nearby in real time through the display status of the status indicator light 116 on the charging plug 100. For example, in one example, when an abnormal state occurs, the operator can complete the emergency stop operation nearby through the emergency stop button on the handheld device or mobile device, or the emergency stop button on the plug housing 110. In a certain example, the operator can also view the ground thermal management and charging and discharging status information nearby in real time through the control panel installed on the charging plug, and start or stop the operation.

[0166] In one embodiment, one end of the shell pressure relief channel included in the main body pressure relief channel extends to communicate with the end face of the second shell end, and the other end of the shell pressure relief channel extends to the device cavity 112 to communicate with the device cavity 112; the portion of the gripping piece close to the second shell end passes through the outer peripheral wall of the shell to extend into the device cavity 112, and the end face of the portion of the gripping piece close to the second shell end is provided with a handle pressure relief port 143; the charging plug also includes a connecting tube 145, which is arranged in the device cavity 112, and the handle pressure relief port 143 is communicated with the main body pressure relief channel through the connecting tube 145.

[0167] See also Figure 2Specifically, a cable integrated head 113 is provided at the lower end of the plug housing 110, and the cable integrated head 113 has a plurality of cable perforations, through which various charging harnesses or water pipes extend into the device cavity 112. Among them, the charging harness passes through the device cavity 112, the gap between the accommodating groove 111 and the lower end of the plug inner core 120, and the lower end surface of the plug inner core 120, and then enters the fluid flow cavity of the plug inner core 120. The water pipe includes a pressure relief pipe, and the pressure relief pipe defines a housing pressure relief channel. The lower end of the handle penetrates the side wall of the device cavity 112 and extends into the device cavity 112.

[0168] In this embodiment, the handle is connected to the pressure relief pipe through the connecting pipe 145. One end of the connecting pipe 145 is sleeved on the part of the handle extending into the device cavity 112 to achieve sealed communication with the handle pressure relief channel, and the other end is inserted into the pressure relief pipe to be sealed and connected with the pressure relief pipe. The connecting pipe 145 can be a hose or a hard pipe, which is not limited in this embodiment. Of course, since the wiring in the device cavity 112 is relatively dense, a hose is more conducive to wiring in the device cavity 112.

[0169] The water pipe also includes a fluid pipe 114, which is used to input the insulating heat exchange fluid input from the lower end of the plug shell 110 into the fluid flow cavity of the plug core 120. However, in this embodiment, the plug core 120 and the plug shell 110 can slide relative to each other. In order to achieve a sealed connection between the fluid flow cavity in the plug core 120 and the fluid pipe 114, a soft water pipe can be connected. However, the distance between the lower end surface of the plug core 120 and the bottom wall of the receiving groove 111 when they are away from each other is long, resulting in a long length of the soft water pipe. The long soft water pipe will occupy the space in the device cavity 112, affecting the stroke length of the plug core 120 in the receiving groove 111, and even forcing the volume of the fluid flow cavity of the plug core 120 to be reduced to leave enough space to accommodate the soft water pipe.

[0170] Therefore, please refer to Figure 7 In one embodiment, a channel opening connected to the fluid channel is formed on the bottom wall of the accommodating groove 111; the charging plug 100 further comprises a pipe joint 126, which is protrudingly arranged on an end surface of the plug inner core 120 facing the bottom wall of the groove, and is connected to the fluid flow cavity. The pipe joint 126 comprises a plurality of tapered portions sequentially connected along the protruding direction of the pipe joint 126, and the outer diameter of the tapered portion gradually decreases in the protruding direction; wherein the pipe joint 126 is suitable for being inserted into the fluid channel from the channel opening, and the tapered portion is interference fit with the fluid channel, so that the fluid flow cavity is sealed and connected with the fluid channel; in addition, on the basis of the interference fit between the tapered portion and the fluid channel, the tapered portion can also be configured to be relatively movable with the fluid channel, so that the fluid flow cavity is sealed and connected with the fluid channel.

[0171] Specifically, a fluid channel is defined in the fluid tube 114 in the device cavity 112, and one end of the fluid tube 114 extends to the bottom wall of the receiving groove 111 to form a channel opening. A pipe joint 126 is protruding from the lower end surface of the plug inner core 120. The pipe joint 126 can be integrally formed with the plug inner core 120, or it can also be an independent component and fixedly installed on the plug inner core 120. The pipe joint 126 protrudes downward along the axial direction of the plug shell 110.

[0172] The pipe joint 126 includes a plurality of tapered portions connected in sequence along the protruding direction of the pipe joint 126, and the outer diameter of the tapered portion gradually decreases in the protruding direction. When the pipe joint 126 is matched with the fluid channel, part of the tapered portion always extends into the fluid channel, and part of the outer peripheral wall of the tapered portion extending into the fluid channel is interference-fitted with the fluid channel, thereby achieving a sealed active connection between the fluid flow cavity and the fluid channel.

[0173] It is not difficult to see that in this embodiment, when the plug inner core 120 is away from or close to the bottom wall of the receiving groove 111, the pipe joint 126 can be fully or partially extended into the fluid channel, and the fluid flow cavity is always kept in sealed and movable communication with the fluid channel. In this process, the pipe joint 126 does not occupy the moving space of the plug inner core 120, thus reducing the overall size of the charging plug 100, making the internal structure of the charging plug more compact and fully utilized. In addition, in order to further improve the sealing performance, the small diameter end sleeve of the tapered portion is provided with a sealing ring or other sealing member.

[0174] The first elastic member 130 can be arranged as a tension spring embedded in the side wall of the receiving groove 111, one end of the tension spring is connected to the plug inner core 120, and the other end is fixedly connected to the side wall of the receiving groove 111, and the two ends are spaced a certain distance apart in the axial direction of the plug shell 110. This tension spring structure does not occupy the space between the lower end surface of the plug inner core 120 and the bottom wall of the receiving groove 111, which is conducive to the lower end surface of the plug inner core 120 stopping at the bottom wall of the receiving groove 111 during the movement. However, this structure will occupy the side space of the receiving groove 111 and increase the thickness of the plug shell 110.

[0175] Alternatively, in one embodiment, the first elastic member 130 is a compression spring, which is disposed between an end surface of the plug inner core 120 facing the groove bottom wall and the groove bottom wall of the receiving groove 111. Thus, one end of the compression spring is connected to the lower end surface of the plug inner core 120, and the other end of the compression spring is connected to the groove side wall of the receiving groove 111.

[0176] In addition, the compression spring can be sleeved on the radial outer side of the pipe joint 126 , so there is no need to design a guide column structure for installing the compression spring in the accommodating groove 111 .

[0177] In addition, in order to enable the compression spring to have sufficient elastic potential energy and always drive the plug inner core 120 away from the connection position, the length dimension of a single compression spring may be relatively large, thereby occupying the space in the slot of the receiving slot 111, and further affecting the travel distance of the plug inner core 120 in the receiving slot 111. Therefore, a plurality of first elastic members 130 may be provided, and a plurality of compression springs with smaller outer diameters and / or lengths may be connected in parallel to achieve stronger elasticity, thereby replacing a single compression spring. It is not difficult to see that a plurality of first elastic members 130 can reduce the occupation of the slot hole space of the receiving slot 111 in the height direction, making the plug housing 110 and the plug inner core 120 more compact as a whole.

[0178] The utility model also proposes a charging gun, including: a charging plug 100 and a charging cable, the charging cable is connected to the second shell end (such as the lower end in the figure) of the plug shell 110 of the charging plug 100, and specifically, the wire in the charging cable is electrically connected to the charging terminal of the charging plug 100, so that power can be supplied during charging. The specific structure of the charging plug 100 refers to the above embodiment. Since the charging gun adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0179] The wire cores in the charging cable are connected to the corresponding charging wire harnesses in the plug housing 110. In addition, a cable fluid channel for heat exchange fluid to flow is defined in the charging cable, and the cable fluid channel is connected to the fluid channel of the plug housing 110.

[0180] The shell pressure relief channel of the plug shell 110 can be directly connected to the outside world, so as to discharge the leaked small amount of insulating heat exchange fluid to the outside world. Alternatively, in one embodiment, a pressure relief return channel extending along the wiring direction of the charging cable is defined in the charging cable, and the shell pressure relief channel of the charging plug 100 is connected to the pressure relief return channel. As a result, the leaked small amount of insulating heat exchange fluid is also recycled, thereby avoiding waste of resources and preventing the insulating heat exchange fluid from polluting the external environment.

[0181] See also Fig.12 The utility model also provides a connector assembly, including: a charging plug 100 and a socket 200, wherein the socket 200 is suitable for plugging and matching with the plug inner core 120 of the charging plug 100, for example, it can be plugged and matched with the above-mentioned charging terminal. The specific structure of the charging plug refers to the above-mentioned embodiment. Since the connector assembly adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0182] Understandably, referring to Fig.13The socket 200 is provided with a corresponding fluid socket 230 so as to be matched with the fluid interface 122 on the charging plug 100 .

[0183] Since in some embodiments, the plug housing 110 is also provided with components such as a control module, the overall weight of the plug housing 110 is relatively heavy. In order to improve the plugging stability between the charging plug and the socket 200, in one embodiment, the socket 200 is adapted to extend into the receiving groove 111 of the charging plug and plug and match with the plug inner core 120 of the charging plug. Thus, each charging terminal on the plug inner core 120 plugs and matches with the corresponding charging plug on the socket 200, and the outer peripheral wall of the socket 200 plugs and matches with the side wall of the receiving groove 111. The plugging and matching at the two places makes the friction between the charging plug 100 and the socket 200 greater, so that the connection between the two is more stable.

[0184] In addition, in one embodiment, the connector assembly also includes: a first mating structure and a second mating structure, a third mating structure and a fourth mating structure, the first mating structure is arranged on the radial outer side of the socket 200, the second mating structure is arranged on the outer peripheral wall of the plug shell 110, and the first mating structure and the second mating structure can be detachably mated; the third mating structure is arranged at the plug-in slot 210 of the socket 200, and the fourth mating structure is arranged at the accommodating slot 111 of the plug shell 110, and the third mating structure and the fourth mating structure can be detachably mated.

[0185] Specifically, in this embodiment, on the basis of the friction fit connection, the charging plug 100 and the socket 200 are further locked through the first matching structure and the second matching structure on the outside of the two, and the third matching structure and the fourth matching structure inside the receiving groove 111. It is not difficult to see that the first matching structure, the second matching structure, the third matching structure, and the fourth matching structure are locked from the inside and outside of the charging plug 100, respectively, so that the charging plug can be more firmly fixed on the socket 200, reducing the risk of accidental falling off after the charging plug 100 is inserted into the socket 200. In this way, even if the friction fit fails, the first matching structure, the second matching structure, the third matching structure, and the fourth matching structure can prevent the charging plug from falling off and causing liquid leakage or charging failure.

[0186] It can be understood that the first matching structure and the second matching structure can be structures such as buckles, locking pins, etc., such as in one embodiment, referring to Fig.12 The first matching structure is constructed as a snap hook 310, which is fixedly arranged on the outer wall of the socket 200; the second matching structure is constructed as a snap member 320, which is rotatably connected to the outer wall of the shell, and the snap member 320 is suitable for hooking on the snap hook 310.

[0187] See also Fig.12Specifically, one side wall of the plug housing 110 may protrude to form an inclined platform, and a snap-fitting piece 320 is pivotally connected to the inclined platform. The snap-fitting piece 320 may be constructed as a hook, a ring, or the like. Accordingly, a snap-fitting hook 310 is fixedly mounted on the outer peripheral wall of the socket 200, or on the body of the eVTOL at the socket 200. After the socket 200 and the plug core 120 are plugged in, the snap-fitting piece 320 may be rotated until it is hooked on the snap-fitting hook 310. Of course, before separating the charging plug from the socket 200, the snap-fitting piece 320 needs to be detached from the snap-fitting hook 310.

[0188] The third matching structure and the fourth matching structure can also be constructed as a locking pin, a buckle, or other structures. Alternatively, in one embodiment, the fourth matching structure is constructed as a locking hole 330 opened on the outer peripheral wall of the plug housing 110, and the locking hole 330 is connected to the receiving groove 111; the third matching structure includes: a locking tongue 343 and a position switching assembly, the locking tongue 343 is arranged in the plug-in slot 210, and the locking tongue 343 is configured to be movable between an extended position and an avoidance position, in the extended position, the locking tongue 343 is suitable for extending into the locking hole 330, and in the avoidance position, the locking tongue 343 avoids the plug housing 110; the position switching assembly is arranged in the plug-in slot 210, and the position switching assembly is suitable for driving the locking tongue 343 to move from the avoidance position to the extended position when the plug inner core 120 and the plug-in slot 210 are plugged in.

[0189] See also Figures 12 to 15 Specifically, at least one locking hole 330 is opened on the outer peripheral wall of the shell, and the locking hole 330 extends along the radial direction of the plug shell 110 to communicate with the accommodating groove 111.

[0190] Since the socket 200 is suitable for extending into the receiving groove 111, the outer peripheral wall of the socket 200 is provided with a lock tongue mounting hole along its radial direction, and the lock tongue mounting hole extends along the radial direction of the socket 200 to communicate with the plug slot 210. Part of the lock tongue 343 is sleeved in the lock tongue mounting hole, and its inner end extends into the plug slot 210. The lock tongue 343 can be extended and retracted in the radial direction of the plug housing 110 in the lock tongue mounting hole. When the charging plug is plugged into the socket 200, the lock hole 330 and the lock tongue mounting hole are aligned and connected one by one. When the lock tongue 343 is extended to the extended position, the lock tongue 343 protrudes from the outer peripheral wall of the socket 200 and its length can extend into the lock hole 330 on the plug housing 110. When the lock tongue 343 is retracted to the avoidance position, the lock tongue 343 can be completely retracted into the lock tongue mounting hole, or it can also partially protrude from the outer wall of the socket 200, as long as it does not affect the input of the socket 200 into the accommodating groove 111, that is, the lock tongue 343 can avoid the plug housing 110 and allow it to slide relative to the outer wall of the socket 200.

[0191] The specific position of the lock tongue 343 is controlled by the position switching component. It can be understood that the position switching component can be constructed as an electromagnet, which drives the lock tongue 343 to extend and retract. Alternatively, the position switching component can also be constructed as an electric control structure composed of a PLC (Programmable Logic Controller) and an electric control switch. However, the above structure is relatively complicated, and it is not possible to realize that the lock tongue 343 automatically extends to the extended position when the charging plug 100 is plugged into the socket 200, and additional instructions are required for control.

[0192] Therefore, in one embodiment, referring to Fig.15 The locking tongue 343 includes a first matching hole 3432 and a second matching hole 3431 which are sequentially opened and connected to each other in the direction from the radial inner side to the radial outer side of the insertion groove 210, and in the width direction of the locking tongue 343, the size of the first matching hole 3432 is smaller than the size of the second matching hole 3431; Fig.14 The position switching assembly includes: a seat body 341, a limiting rod 342, a second elastic member 345 and a third elastic member 344. The seat body 341 is disposed in the plug slot 210, and the seat body 341 faces the side of the opening of the plug slot 210 (refer to Fig.14 The side wall of the base body 341 is provided with a rod movable hole, and the base body 341 is also provided with a lock tongue movable hole. When the plug inner core 120 is plugged into the plug slot 210, the lock tongue movable hole and the lock hole 330 are opposite to each other. The base body 341 also defines a component accommodating cavity 3411 which is connected to the rod movable hole and the lock tongue movable hole respectively; wherein the lock tongue 343 can be slidably assembled in the lock tongue movable hole; the limiting rod 342 is movably arranged in the rod movable hole along the depth direction of the plug slot 210, and one end of the limiting rod 342 extends from the rod movable hole to protrude from a side wall of the base body 341 facing the opening of the plug slot 210 (for example, protruding from Fig.14 ), in the insertion direction of the plug-in slot 210, the limiting rod 342 includes a small diameter portion 3421 and a large diameter portion 3422 arranged in sequence, the outer diameter of the large diameter portion 3422 is larger than the outer diameter of the small diameter portion 3421, and the limiting rod 342 has a limiting position and a triggering position, in the limiting position, the large diameter portion 3422 cooperates with the second matching hole 3431, and in the triggering position, the small diameter portion 3421 cooperates with the first matching hole 3432; the second elastic member 345 is arranged in the component accommodating cavity 3411, and the two ends of the second elastic member 345 are respectively connected to the seat body 341 and the locking tongue 343, and the second elastic member 345 often drives the locking tongue 343 to move toward the extended position; the third elastic member 344 is arranged in the component accommodating cavity 3411, and the third elastic member 344 often drives the limiting rod 342 to move toward the triggering position.

[0193] Specifically, see Fig.14 and Fig.15The seat body 341 can be constructed as a 匚-shaped plate. After the seat body 341 is installed in the plug-in slot 210, its opening faces the slot side wall of the plug-in slot 210 and is directly opposite to and connected with the bolt mounting hole. At this time, the top plate of the 匚-shaped plate faces the opening direction of the plug-in slot 210 and is provided with a rod movable hole. It can be understood that the top and bottom of the 匚-shaped plate are relative to the slot bottom wall of the plug-in slot 210; for example, the slot bottom wall of the plug-in slot 210 and the bottom plate of the 匚-shaped plate are in Fig.14 On the upper side, the top plate of the 匚-shaped plate is Fig.14 The bottom plate of the 匚-shaped plate can be fixed in the plug slot 210 by gluing, screwing or welding. The middle plate of the 匚-shaped plate extends along the depth direction of the plug slot 210 (the axial direction of the plug housing), and is spaced apart from the slot side wall of the plug slot 210 to define the component accommodating cavity 3411.

[0194] The inner end of the lock tongue 343 extends from the lock tongue mounting hole to the component accommodating cavity 3411, and is connected to the second elastic member 345. The second elastic member 345 can be constructed as a spring, a compression spring or a disc spring, etc., which is arranged between the inner end of the lock tongue 343 and the middle plate of the 匚-shaped plate, and often drives the lock tongue 343 to extend outward to the extended position. It is worth mentioning that in the direction from the radial inner side to the radial outer side of the plug-in slot 210, the lock tongue 343 includes a first matching hole 3432 and a second matching hole 3431 that are sequentially opened and connected to each other, and in the width direction of the lock tongue 343, the size of the first matching hole 3432 is smaller than the size of the second matching hole 3431. For example, in one example, the first matching hole 3432 and the second matching hole 3431 together form a hole in the shape of a "convex" character, wherein the protruding part of the hole in the shape of a "convex" character is the first matching hole 3432, and the remaining part of the "convex" character is the second matching hole 3431. Obviously, in the width direction of the locking tongue 343, the size of the first matching hole 3432 is smaller than the size of the second matching hole 3431. Of course, in other examples, the first matching hole 3432 and the second matching hole 3431 can also be configured as a hole structure in an "L" shape, etc., and this embodiment is not limited to this.

[0195] A limiting rod 342 is also installed in the component accommodating cavity 3411. The limiting rod 342 can move in the rod movable hole along the depth direction of the plug-in slot 210 (in the same direction as the axial direction of the plug-in shell), and one end of the limiting rod 342 extends from the rod movable hole to protrude from the top plate of the 匚-shaped plate, and the other end of the limiting rod 342 is connected to the third elastic member 344. The third elastic member 344 can be constructed as a spring, a compression spring or a disc spring. The two ends of the third elastic member 344 are respectively connected to the seat body 341 and the limiting rod 342, and the third elastic member 344 often drives the limiting rod 342 to move to the limit position outside the plug-in slot 210.

[0196] In the insertion direction of the insertion slot 210, the limiting rod 342 is a variable diameter structure, specifically including a small diameter portion 3421 and a large diameter portion 3422 arranged in sequence, and the outer diameter of the large diameter portion 3422 is larger than the outer diameter of the small diameter portion 3421. It is worth mentioning that the outer diameter of the large diameter portion 3422 is larger than the width of the first matching hole 3432, so that the large diameter portion 3422 cannot extend into the first matching hole 3432. The outer diameter of the small diameter portion 3421 is less than or equal to the width of the first matching hole 3432, so that it can extend into the first matching hole 3432.

[0197] In this way, in the process of matching the plug inner core 120 with the insertion slot 210, the plug inner core 120 and the insertion slot 210 are close to each other, and the limiting rod 342 is in the limiting position, that is, the large diameter portion 3422 extends into the second matching hole 3431. One end of the limiting rod 342 first contacts the upper end surface of the plug inner core 120. In this process, the socket 200 as a whole pushes the plug inner core 120 to move to the end position of the stroke in the receiving slot 111. At the same time, the plug inner core 120 pushes the limiting rod 342 in the reverse direction to overcome the elastic potential energy of the third elastic member 344 and move to the trigger position until the large diameter portion 3422 of the limiting rod 342 is separated from the second matching hole 3431 and the small diameter portion 3421 enters the second matching hole 3431 in the insertion direction of the insertion slot. Under the action of the second elastic member 345, the locking tongue 343 extends to the extended position, and the small diameter portion 3421 is inserted into the first matching hole 3432.

[0198] It is not difficult to see that in the present embodiment, the lock tongue 343 can be controlled by mechanical structures such as the first matching hole 3432, the second matching hole 3431, the limiting rod 342, the second elastic member 345 and the third elastic member 344, and the above structure can naturally complete the extension of the lock tongue 343 when the charging plug 100 and the socket 200 are plugged in and matched, without the need for additional operation by the staff, and has high reliability.

[0199] It is worth mentioning that the large diameter portion 3422 and the small diameter portion 3421 can be connected by a conical transition, or a step can be formed at the connection between the two. The step formed at the connection between the two facilitates the large diameter portion 3422 to quickly disengage from the second matching hole 3431, and the small diameter portion 3421 to quickly enter the first matching hole 3432, thereby increasing the position switching rate of the lock tongue 343.

[0200] Of course, it is understandable that when the charging plug and the socket 200 are separated, the locking tongue 343 can be pushed back to the avoidance position using a tool such as a paddle.

[0201] In addition, in order to prevent the limiting rod 342 from being completely retracted into the rod movable hole, a cap portion is formed at the other end of the limiting rod 342, and the outer diameter of the cap portion is larger than the aperture of the rod movable hole.

[0202] It should be noted that the third matching structure may also be disposed on the plug housing 110 , and the corresponding fourth matching structure is disposed in the plug slot 210 .

[0203] In order to ensure that the upper end surface of the plug inner core 120 can stably push the limiting rod 342, please refer to Fig.10 In one embodiment, a boss 128 is protruded from one end of the plug inner core 120 away from the bottom wall of the receiving groove 111. The limiting rod 342 is adapted to stop at the boss 128 when the plug inner core 120 is plugged into the plug groove 210.

[0204] The boss 128 can be integrally formed with the plug inner core 120, and a corresponding cavity can be defined therein, thereby expanding the volume of the cavity through which the fluid flows. Alternatively, the boss 128 can be a shaped part fixedly connected to the upper end surface of the plug inner core 120, and bonded to the upper end surface of the plug inner core 120.

[0205] See also Fig.13 and Fig.16 In order to enable the socket 200 of this embodiment to independently cooperate with a standard charging gun, in one embodiment, a standard DC charging interface 220 is provided in the plug slot 210, and the fourth matching structure is provided on the outside of the standard DC charging interface 220 and is spaced apart from each other.

[0206] Specifically, the standard DC charging interface 220 is provided at the geometric center of the bottom wall of the plug slot 210 of the socket 200. The left and right sides of the standard DC charging interface 220 are respectively the first extended matching area 240a and the second extended matching area 240b. The first extended matching area 240a matches with the first extended area 125a of the charging plug, and the second extended matching area 240b matches with the second extended area 125b. At this time, the aforementioned fourth matching structure is arranged in the first extended area 125a or the second extended area 125b, and is separated from the standard DC charging interface 220.

[0207] In order to improve the reliability of fastening, in one embodiment, a plurality of the third matching structures and a plurality of the fourth matching structures are provided.

[0208] Specifically, the connector assembly may include at least two of the fourth matching structures. For example, four fourth matching structures may be provided, and the four fourth matching structures are evenly spaced along the circumferential direction of the standard DC charging interface 220. Accordingly, the third matching structure and the boss 128 on the plug housing 110 are also provided in four numbers. Of course, the fourth matching structure may also be two or three or more, and this embodiment does not limit this.

[0209] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A charging plug, characterized in that: The charging plug comprises a plug body, an end surface of which is provided with a plurality of charging terminals and a plurality of fluid interfaces, and the plug body further defines: a fluid channel, the fluid channel being used to connect to a cooling source; The fluid flows through the cavity, the fluid flows through the cavity respectively connects the fluid channel and the fluid interface, the fluid flows through the cavity is used for allowing the heat exchange fluid from the cooling source to flow through, and the fluid interface is used for connecting the cooling circuit of the external device.

2. The charging plug according to claim 1, characterized in that: All of the charging terminals include at least a plurality of charging terminals to be cooled, and the charging plug further includes a plurality of charging harnesses, the number of the charging harnesses is consistent with the number of the charging terminals to be cooled and they are connected to each other in a one-to-one correspondence; at least one of a portion of the charging terminals to be cooled and a portion of the charging harnesses is arranged in the fluid flow cavity, and another portion of the charging terminals to be cooled passes through the end surface of the plug body to be exposed from the plug body.

3. The charging plug according to claim 2, characterized in that: The plug body comprises a plug shell and a plug core, and an accommodating groove is provided on the end surface of the first shell end of the plug shell in the axial direction; The plug inner core is movably arranged in the receiving groove along the axial direction of the plug shell, and a plurality of charging terminals are arranged on an end surface of the plug inner core away from the groove bottom wall of the receiving groove. The plug inner core and the plug shell jointly define the fluid flow cavity.

4. The charging plug according to claim 3, characterized in that: Another part of the charging terminal to be cooled passes through an end surface of the plug inner core facing away from the groove bottom wall to be exposed from the plug inner core; another part of the charging wiring harness passes through an end surface of the plug inner core facing the groove bottom wall of the accommodating groove to extend into the plug shell.

5. The charging plug according to claim 4, characterized in that: The end surface of the plug inner core facing away from the bottom wall of the receiving groove comprises a standard charging interface portion and an expansion area, wherein the expansion area is provided with a plurality of fluid interfaces connected to the fluid flow cavity; All of the charging terminals to be cooled include a plurality of standard charging terminals, and at least some of the standard charging terminals are arranged in the standard charging interface portion.

6. The charging plug according to claim 5, characterized in that: The charging plug further includes a plurality of low-voltage emergency power terminals, at least some of which are arranged in the expansion area.

7. The charging plug according to claim 6, characterized in that: The expansion area includes a first expansion area and a second expansion area, and the first expansion area and the second expansion area are symmetrically arranged on both sides of the standard charging interface portion; Part of all the low-voltage emergency power supply terminals and part of all the fluid interfaces are arranged in the first extension area, and another part of all the low-voltage emergency power supply terminals and another part of all the fluid interfaces are symmetrically arranged in the second extension area.

8. The charging plug according to claim 7, characterized in that: The fluid flow chamber is divided into a first fluid flow chamber and a second fluid flow chamber by a partition, and the flow directions of the heat exchange fluids in the first fluid flow chamber and the second fluid flow chamber are opposite, and at least a portion of the first fluid flow chamber is opposite to the first expansion area, and at least a portion of the second fluid flow chamber is opposite to the second expansion area.

9. The charging plug according to claim 8, characterized in that: All the fluid interfaces communicating with the first fluid flow cavity are used to connect to the liquid inlet end of the cooling circuit of the external device, and all the fluid interfaces communicating with the second fluid flow cavity are used to connect to the liquid outlet end of the cooling circuit of the external device.

10. The charging plug according to claim 8, characterized in that: The first fluid flows through the cavity to define a first sub-cavity and a second sub-cavity, and the second fluid flows through the cavity to define a third sub-cavity and a fourth sub-cavity; wherein a portion of all the low-voltage emergency power supply terminals extends into the first sub-cavity, a portion of all the fluid interfaces communicates with the second sub-cavity, another portion of all the low-voltage emergency power supply terminals extends into the third sub-cavity, and another portion of all the fluid interfaces communicates with the fourth sub-cavity; or, The plug inner core and the plug outer shell also jointly define a first standard cavity and a second standard cavity. On the radial plane of the plug inner core, the first standard cavity, the second fluid flow cavity, the second standard cavity and the first fluid flow cavity are sequentially distributed along the circumference of the plug inner core; the high-voltage DC positive terminal and the low-voltage auxiliary power supply positive terminal in the plurality of standard charging terminals are all in the first fluid flow cavity and connected to the corresponding charging harness, and the high-voltage DC negative terminal and the low-voltage auxiliary power supply negative terminal in the plurality of standard charging terminals are all in the second fluid flow cavity and connected to the corresponding charging harness; the charging plug also includes a first communication terminal, a second communication terminal, a first charging connection terminal, a second charging connection terminal and a grounding terminal, and the first communication terminal, the second communication terminal, the first charging connection terminal and the second charging connection terminal are all arranged at a position of the standard charging interface portion facing the first standard cavity; the grounding terminal is arranged at a position of the standard charging interface portion facing the second standard cavity.

11. The charging plug according to claim 3, characterized in that: The fluid flow cavity is divided into an independent loop connection cavity and a charging cooling cavity, and the loop connection cavity is connected to the fluid channel and the fluid interface respectively; at least one of a part of the charging terminal to be cooled and a part of the charging harness is arranged in the charging cooling cavity, and the charging cooling cavity is connected to the fluid channel.

12. The charging plug according to any one of claims 4 to 11, characterized in that: A device cavity is also defined in the plug shell of the plug body, and the device cavity is arranged between the receiving groove of the plug body and the second shell end of the plug shell in the axial direction; The charging plug also includes: A plurality of detection elements, wherein the detection elements are arranged in the plug inner core of the plug body or in the plug outer shell; A control module, the control module is arranged in the device cavity, the control module is respectively connected to each of the detection elements for communication, and the control module has a plurality of status indicator lights; An operating member, the operating member is arranged on the outer peripheral wall of the plug housing, a part of the operating member passes through the side wall of the plug housing and extends into the device cavity to be connected with the control module; the operating member includes a touch screen and / or a control button; Among them, the outer wall of the plug shell is provided with a plurality of through holes, and the through holes are connected to the device cavity. The number of the plurality of through holes is consistent with the number of the plurality of status indicator lights and corresponds to each other one by one, so that each status indicator light extends into the corresponding through hole and emerges from the corresponding through hole.

13. The charging plug according to claim 3, characterized in that: The bottom wall of the receiving groove is provided with a channel opening connected with the fluid channel; The charging plug further comprises a pipe joint, the pipe joint is protrudingly arranged on an end surface of the plug inner core facing the groove bottom wall, the pipe joint is communicated with the fluid flow cavity, the pipe joint comprises a plurality of tapered portions sequentially connected along a protruding direction of the pipe joint, and the outer diameter of the tapered portion gradually decreases in the protruding direction; The pipe joint is suitable for being inserted into the fluid channel from the channel opening, and the tapered portion is interference fit with the fluid channel so that the fluid flows through the cavity and is sealed and connected with the fluid channel.

14. A charging gun, characterized in that: include: A charging plug as claimed in any one of claims 1 to 13; A charging cable, wherein the conductive wires in the charging cable are electrically connected to the charging terminals of the charging plug.

15. A joint assembly, characterized in that: include: The charging plug according to any one of claims 1 to 12; as well as A socket is suitable for plugging and matching with the charging terminal of the charging plug.

16. The joint assembly according to claim 15, characterized in that The socket is suitable for extending into the receiving groove of the charging plug and plugging and matching with the charging terminal.

17. The joint assembly according to claim 15, wherein: The joint assembly also includes: A first matching structure and a second matching structure, wherein the first matching structure is arranged on the radial outer side of the socket, and the second matching structure is arranged on the outer peripheral wall of the plug shell of the plug body, and the first matching structure and the second matching structure are separably matched; The third matching structure and the fourth matching structure, the third matching structure is arranged at the plugging slot of the socket, the fourth matching structure is arranged at the receiving slot of the plug shell of the plug body, and the third matching structure and the fourth matching structure can be matched detachably.

18. The joint assembly according to claim 17, wherein: The first matching structure is configured as a buckle hook, and the buckle hook is fixedly disposed on the outer peripheral wall of the socket; The second matching structure is configured as a buckle member, the buckle member is rotatably connected to the outer peripheral wall of the plug housing, and the buckle member is suitable for being hooked on the buckle hook.

19. The joint assembly according to claim 17 or 18, characterized in that: The fourth matching structure is configured as a locking hole provided on the outer peripheral wall of the plug housing, and the locking hole is communicated with the receiving groove; The third matching structure comprises: A locking tongue, the locking tongue being arranged in the plug slot of the socket and being configured to be movable between an extended position and a retracted position, wherein the locking tongue is adapted to extend into the locking hole in the extended position and the locking tongue is retracted from the plug housing in the retracted position; A position switching component is disposed in the plug slot, and is suitable for driving the locking tongue to move from the avoidance position to the extended position when the plug inner core of the plug body is plugged into the plug slot.

20. The connector assembly of claim 19, wherein: The locking tongue comprises a first matching hole and a second matching hole which are sequentially opened and connected to each other in the direction from the radial inner side to the radial outer side of the plug-in slot, and in the width direction of the locking tongue, the size of the first matching hole is smaller than the size of the second matching hole; The position switching component comprises: A seat body, the seat body is arranged in the plug-in slot, a side wall of the seat body facing the opening of the plug-in slot is provided with a rod movable hole, the seat body is also provided with a lock tongue movable hole, when the inner core of the plug is plugged into the plug-in slot, the lock tongue movable hole and the lock hole are directly opposite to each other, and the seat body is also defined with a component accommodating cavity which is respectively connected with the rod movable hole and the lock tongue movable hole; wherein the lock tongue can be slidably assembled in the lock tongue movable hole; A limit rod, wherein the limit rod is movably arranged in the rod movable hole along the depth direction of the plug-in slot, and one end of the limit rod extends from the rod movable hole to protrude from a side wall of the seat body facing the opening of the plug-in slot, and in the insertion direction of the plug-in slot, the limit rod comprises a small diameter portion and a large diameter portion arranged in sequence, the outer diameter of the large diameter portion is larger than the outer diameter of the small diameter portion, and the limit rod has a limit position and a trigger position, in the limit position, the large diameter portion is matched with the second matching hole, and in the trigger position, the small diameter portion is matched with the first matching hole; a second elastic member, the second elastic member being disposed in the component accommodating cavity, the two ends of the second elastic member being respectively connected to the seat body and the locking tongue, and the second elastic member normally driving the locking tongue to move toward the extended position; A third elastic member is disposed in the component accommodating cavity, two ends of the third elastic member are respectively connected to the seat body and the limiting rod, and the third elastic member often drives the limiting rod to move toward the trigger position.

21. The joint assembly according to claim 20, wherein: A boss is protruded from an end surface of the plug inner core away from the bottom wall of the receiving groove; Wherein, the limiting rod is suitable for stopping at the boss when the inner core of the plug is plugged into and matched with the plug slot.

22. The connector assembly of claim 17, wherein: A standard DC charging interface is arranged in the plug slot of the socket, and the connector assembly includes at least two fourth matching structures, which are arranged on the outside of the standard DC charging interface and are spaced apart from each other.

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