Charging plug, charging gun and joint assembly

Abstract

The application discloses a charging plug, a charging gun and a joint assembly, and relates to the technical field of ground maintenance. The fluid channel defined by the charging plug is used for connecting a cooling source. The fluid flow cavities are respectively connected with the fluid channel and the fluid interface, so that the cooling circuit of external equipment such as an electric vehicle can be connected with the fluid interface on the charging plug conveniently and quickly, and the heat management capability is improved. In addition, the charging plug can switch the in-out liquid direction through the first and second fluid flow cavities, so that the internal temperature difference of the battery system of the corresponding external equipment can be reduced through the timing switching. Alternatively, the heat exchange fluid in the loop connection cavity can independently perform heat management through the cooling circuit of the external equipment, which is beneficial to improving the accuracy of heat management on the external equipment, improving the temperature uniformity of each position of the external equipment, and enabling the heat exchange fluid in the charging cooling cavity to independently dissipate heat for the to-be-cooled charging terminal or the charging wire harness.

Description

[0001] The present application is a divisional application of the patent application with application number 202411338528.X and titled "Charging plug, charging gun and connector assembly", filed on September 25, 2024. TECHNICAL FIELD

[0002] The present application relates to the technical field of ground maintenance, in particular to a charging plug, a charging gun and a connector assembly. BACKGROUND

[0003] New energy vehicles, eVTOL (Electric Vertical Takeoff and Landing), new energy ships and other electric vehicles powered by electricity include power battery packs. When the electric vehicles are maintained on the ground, the power battery packs need to be restored to a specified power level.

[0004] In addition, the propulsion and support system of the eVTOL and other electric vehicles is powered by the power battery. The battery thermal management needs to be considered during the charging and discharging of the power battery. Otherwise, the battery thermal runaway may endanger the safety of the electric vehicle, passengers and the surrounding environment. Moreover, the thermal management is important for achieving fast and effective charging of the power battery.

[0005] How to better achieve the thermal management coupling design of the power battery has become a technical problem to be solved. SUMMARY

[0006] The main purpose of the present application is to provide a charging plug, a charging gun and a connector assembly, which aims to improve the thermal management capability.

[0007] To achieve the above object, the application provides a charging plug, which comprises a plug body, the end surface 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 flow-through cavity, the fluid channel is used for connecting a cooling source, the fluid flow-through cavity is respectively communicated with the fluid channel and the fluid interface, the fluid flow-through cavity is used for flowing through heat exchange fluid from the cooling source, and the fluid interface is used for connecting a cooling loop of an external device; all the charging terminals at least include a plurality of to-be-cooled charging terminals, the charging plug further comprises a plurality of charging harnesses; at least one of a part of the to-be-cooled charging terminals and a part of the charging harnesses is arranged in the fluid flow-through cavity; the fluid flow-through cavity is divided into a first fluid flow-through cavity and a second fluid flow-through cavity by a partition plate, the flow directions of the heat exchange fluid in the first fluid flow-through cavity and the second fluid flow-through cavity are opposite; the first fluid flow-through cavity is arranged as one of an inlet channel and an outlet channel, and the second fluid flow-through cavity is arranged as the other one of the inlet channel and the outlet channel; or the fluid flow-through cavity is divided into a loop connection cavity and a charging cooling cavity which are independent of each other, the loop connection cavity is respectively communicated with the fluid channel and the fluid interface; at least one of a part of the to-be-cooled charging terminals and a part of the charging harnesses is arranged in the charging cooling cavity, and the charging cooling cavity is communicated with the fluid channel.

[0008] In an implementation manner, all the fluid interfaces communicated with the first fluid flow-through cavity are used for connecting inlet ends of the cooling loop of the external device, and all the fluid interfaces communicated with the second fluid flow-through cavity are used for connecting outlet ends of the cooling loop of the external device.

[0009] In an implementation manner, the charging plug further comprises a plurality of low-voltage emergency power supply terminals, and the low-voltage emergency power supply terminals extend into the fluid flow-through cavity.

[0010] In an implementation manner, the first fluid flow-through cavity defines a first sub-cavity and a second sub-cavity, and the second fluid flow-through cavity defines a third sub-cavity and a fourth sub-cavity; wherein a part of all the low-voltage emergency power supply terminals extends into the first sub-cavity, a part of all the fluid interfaces is communicated with the second sub-cavity, another part of all the low-voltage emergency power supply terminals extends into the third sub-cavity, and another part of all the fluid interfaces is communicated with the fourth sub-cavity.

[0011] In an implementation manner, all the to-be-cooled charging terminals include a plurality of standard charging terminals, a high-voltage direct-current positive terminal of a plurality of the standard charging terminals is in the first fluid flow-through cavity and is connected with a corresponding charging harness, and a high-voltage direct-current negative terminal of a plurality of the standard charging terminals is in the second fluid flow-through cavity and is connected with a corresponding charging harness.

[0012] In an implementation, all of the charging terminals to be cooled include a plurality of standard charging terminals, a positive terminal of a low-voltage auxiliary power supply in the plurality of standard charging terminals is in the first fluid flow channel and connected with a corresponding charging harness, and a negative terminal of the low-voltage auxiliary power supply in the plurality of standard charging terminals is in the second fluid flow channel and connected with the corresponding charging harness.

[0013] In an implementation, the plug body includes a plug shell and a plug inner core, an end face of a first shell end in an axial direction of the plug shell is provided with a receiving groove extending to a second shell end in the axial direction of the plug shell, and the plug inner core is arranged in the receiving groove, an end face of one end of the plug inner core away from a groove bottom wall of the receiving groove is provided with a plurality of the charging terminals, and the plug inner core and the plug shell jointly define the fluid flow channel.

[0014] In an implementation, another part of the charging terminals to be cooled is exposed from the plug inner core by penetrating through an end face of one end of the plug inner core away from the groove bottom wall, and another part of the charging harness extends into the plug shell by penetrating through an end face of one end of the plug inner core toward the groove bottom wall of the receiving groove.

[0015] In an implementation, the end face of one end of the plug inner core away from the groove bottom wall of the receiving groove includes a standard charging interface part and an extension area, the extension area is provided with a plurality of the fluid interfaces in communication with the fluid flow channel, and all or part of the low-voltage emergency power supply terminals are arranged in the extension area.

[0016] In an implementation, the low-voltage emergency power supply terminals extend to a part of the plug inner core in which the fluid flow channel is not arranged.

[0017] In an implementation, the end face of one end of the plug inner core away from the groove bottom wall of the receiving groove includes a standard charging interface part and an extension area, the extension area is provided with a plurality of the fluid interfaces in communication with the fluid flow channel, the plug inner core and the plug shell jointly define a first standard cavity and a second standard cavity, in a radial plane of the plug inner core, the first standard cavity, the second fluid flow channel, the second standard cavity and the first fluid flow channel are sequentially distributed in a circumferential direction of the plug inner core, the charging plug further includes a first communication terminal, a second communication terminal, a first charging connection terminal, a second charging connection terminal and a grounding terminal, the first communication terminal, the second communication terminal, the first charging connection terminal and the second charging connection terminal are arranged at positions of the standard charging interface part opposite to the first standard cavity, and the grounding terminal is arranged at a position of the standard charging interface part opposite to the second standard cavity.

[0018] In an implementation, at least part of the standard charging terminal is arranged at the standard charging interface part.

[0019] In addition, the application further provides a charging gun, which comprises a charging cable and the charging plug; the wire in the charging cable is electrically connected with the charging terminal of the charging plug.

[0020] In addition, the application further provides a joint assembly, which comprises a socket and the charging plug; the socket is adapted to be plugged with the charging terminal of the charging plug.

[0021] The fluid channel defined by the charging plug provided by the technical scheme of the application is used for connecting a cooling source, and the fluid flow cavities are respectively connected with the fluid channel and the fluid interface, so that the cooling circuit of the external equipment such as the electric vehicle can be conveniently and quickly connected with the fluid interface on the charging plug, so that the cooling components such as the power battery pack of the external equipment can be efficiently managed, and the heat management capability is improved. In addition, the charging plug can switch the in-out liquid direction through the first fluid flow cavity and the second fluid flow cavity, so that the internal temperature difference of the battery system of the external equipment corresponding to the charging plug can be greatly reduced through the timing switching of the in-out liquid direction; or the cooling liquid or other heat exchange fluid in the circuit connection cavity can independently manage the heat of the external equipment through the cooling circuit of the external equipment, which is beneficial to improve the accuracy of heat management of the external equipment, improve the temperature uniformity of each position of the external equipment, and the heat exchange fluid in the charging cooling cavity can independently dissipate heat of the to-be-cooled charging terminal or charging wire harness to improve the heat dissipation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0023] Figure 1 The structural schematic diagram of an embodiment of the charging plug provided by the application;

[0024] Figure 2 The sectional view of the plug inner core in the communication position in an embodiment of the charging plug provided by the application;

[0025] Figure 3 The schematic diagram of the handle in an embodiment of the charging plug provided by the application;

[0026] Figure 4A schematic view of the cooperation between the handle and the handle sliding groove in an embodiment of the present application;

[0027] Figure 5 A schematic view of the internal space of the charging plug in an embodiment of the present application;

[0028] Figure 6 A schematic view of the internal space of the charging plug in another embodiment of the present application;

[0029] Figure 7 A schematic view of the plug inner core in an embodiment of the present application;

[0030] Figure 8 A schematic view of the plug inner core in an embodiment of the present application; Figure 7 A sectional view of the B-B position in an embodiment of the present application;

[0031] Figure 9 A schematic view of the plug inner core in an embodiment of the present application; Figure 7 A sectional view of the A-A position in an embodiment of the present application;

[0032] Figure 10 A schematic view of the plug inner core in an embodiment of the present application;

[0033] Figure 11 A schematic view of the plug inner core in an embodiment of the present application;

[0034] Figure 12 A schematic view of the plug inner core in an embodiment of the present application;

[0035] Figure 13 A schematic view of the plug inner core in an embodiment of the present application;

[0036] Figure 14 A schematic view of the plug inner core in an embodiment of the present application;

[0037] Figure 15 A schematic view of the plug inner core in an embodiment of the present application;

[0038] Figure 16 A schematic view of the plug inner core in an embodiment of the present application;

[0039] Explanation of the reference signs:

[0040] 100, charging plug; 110, plug shell; 111, accommodating groove; 112, device cavity; 113, cable integrated head; 114, water pipe; 115, operating piece; 116, status indicator light; 120, plug inner core; 122, fluid interface; 121, fluid flow cavity; 121a, first fluid flow cavity; 121a1, first sub-cavity; 121a2, second sub-cavity; 121b, second fluid flow cavity; 121b1, third sub-cavity; 121b2, fourth sub-cavity; 121c, first standard cavity; 121d, second standard cavity; 123, handle sliding groove; 124, standard charging interface part; 125a, first expansion area; 125b, second expansion area; 126, pipe joint; 127, Y-shaped pipe; 128, boss; 129, inner core pressure relief port; 130, first elastic piece; 140, handle; 141, intermediate pressure relief channel; 142, sliding part; 143, handle pressure relief port; 144, shell pressure relief port; 145, connecting pipe; 150, low-voltage emergency power supply terminal; 200, socket; 210, plug-in slot; 220, standard DC charging interface; 230, fluid insertion slot; 240a, first expansion matching area; 240b, second expansion matching area; 310, buckling hook; 320, buckling piece; 330, lock hole; 341, seat body; 3411, component mounting groove; 342, limiting rod; 3421, small-diameter part; 3422, large-diameter part; 343, lock tongue; 3431, second matching hole; 3432, first matching hole; 344, third elastic piece; 345, second elastic piece.

[0041] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0043] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0044] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0045] The electric vehicle, eVTOL (Electric Vertical Takeoff and Landing), new energy ship and other electric vehicles powered by electric energy are provided with a charging socket matched with a charging plug on the carrier body of the electric vehicle. When the charging plug and the charging socket are matched, a plurality of charging terminals on the charging plug are matched with corresponding plug sleeves on the charging socket.

[0046] Taking eVTOL as an example, the power battery needs to be restored to a specified power and temperature before each flight. In order to make eVTOL more portable and improve the overall integration and performance of eVTOL, decoupling eVTOL thermal management into an aerial passive thermal management system (relying on the temperature difference interval created by heat capacity and ground temperature regulation) and a ground active thermal management system is a more feasible solution. Therefore, a thermal management interface is needed on the eVTOL, and the ground active thermal management system communicates with the eVTOL through the thermal management interface to establish a heat exchange fluid delivery channel and provide corresponding heat exchange fluid to the eVTOL. Specifically, the thermal management interface can be configured as a socket, and the ground active thermal management system has a corresponding charging plug structure.

[0047] Next, the technical concept of the present application will be further described in conjunction with some specific embodiments.

[0048] Referring to Figure 1 and Figure 2 The charging plug 100 provided by the present application includes a plug body, wherein the plug body can include a separately arranged plug shell 110 and a plug inner core 120, of course, the plug body can also be provided as an integrally formed shell structure. The end face of the plug body is provided with a plurality of charging terminals and a plurality of fluid interfaces 122, for example Figure 1The upper end face of the plug body is provided with the charging terminal and the fluid interface 122. The plug body further defines a fluid passage for connecting a cooling source, a fluid flow-through cavity 121 for the heat exchange fluid from the cooling source to flow through, and a body pressure relief passage.

[0049] The fluid flow-through cavity 121 is in communication with the fluid passage and the fluid interface 122, respectively, and is used for the heat exchange fluid from the cooling source to flow through. The fluid interface 122 is used to connect the cooling circuit of an external device, for example, the fluid interface 122 can connect the cooling circuit for cooling the power battery of an electric vehicle such as an eVTOL. All charging terminals at least include a plurality of charging terminals to be cooled, and it can be understood that at least part of the charging terminals are arranged as charging terminals to be cooled, so as to be cooled by subsequent structures.

[0050] The charging plug 100 further includes a plurality of charging wire bundles, the number of charging wire bundles is consistent with the number of charging terminals to be cooled and is one-to-one corresponding connection; at least one of a part of the charging terminals to be cooled and a part of the charging wire bundles 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 bundles is arranged in the fluid flow-through cavity, a part of the cooling charging terminals and a part of the charging wire bundles are arranged in the fluid flow-through cavity, which is not limited in the embodiment. In addition, another part of the cooling charging terminals penetrates the end face of the plug body to be exposed from the plug body, for example, exposed from the upper side in the figure, so as to facilitate electrical connection for charging. In addition, the body pressure relief passage is in communication with the fluid flow-through cavity, and the body pressure relief passage is configured to be openable and closable. A pressure relief valve assembly can be provided on the body pressure relief passage, and the pressure relief valve assembly is used to convert the opening and closing of the body pressure relief passage to realize opening and closing; of course, a movable baffle structure can also be arranged at the inlet and outlet positions of the body pressure relief passage, so as to realize the opening and closing of the body pressure relief passage by the relative movement of the baffle structure, which is not limited in the embodiment.

[0051] It can be understood that when the charging plug 100 is connected with 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 compared to the overall length, the total flow amount of the cooling liquid is relatively large, and the pressure difference between the cooling source and the cooling circuit is relatively large, etc., when the cooling circuit is connected with the charging plug 100, the risk of liquid path blockage and instantaneous high pressure is relatively large.

[0052] In the above embodiments, the fluid passage defined by the charging plug 100 is used to connect a cooling source, and the fluid flow-through cavity is in communication with the fluid passage and the fluid interface, so that the cooling circuit of the external device such as the electric vehicle can be conveniently and quickly connected through the fluid interface 122 on the charging plug 100, so that the cooling components such as the power battery pack of the external device can be efficiently thermally managed; on the other hand, the number of charging harnesses is consistent with the number of charging terminals to be cooled, and each charging harness is connected to one charging terminal to be cooled; at least one of a part of the charging terminals to be cooled and a part of the charging harnesses is arranged in the fluid flow-through cavity 121, and the other part of the charging terminals to be cooled is exposed from the plug body through the end face of the plug body, so that the charging plug 100 can conveniently and quickly charge the external device such as the electric vehicle through the charging terminals, and the charging terminals to be cooled or the charging harnesses near the plug-in position can be cooled through the fluid flow-through cavity 121, which is beneficial to improve the overall charging current or charging power and reduce the charging time. On the other hand, the body pressure relief passage on the plug body is in communication with the fluid flow-through cavity, and the body pressure relief passage is configured to be openable and closable, so that when the liquid path including the fluid passage, the fluid flow-through cavity, the fluid interface and the cooling circuit of the external device is blocked or forms a transient high pressure, the body pressure relief passage can be opened to relieve pressure, reducing the risk of damage to the charging plug 100 and the cooling circuit of the external device.

[0053] Referring to Figure 2 and Figure 3 , the plug body in some embodiments can be provided to include a plug shell 110 and a plug inner core 120. The end face of the first shell end of the plug shell 110 in the axial direction is provided with a receiving groove 111, and the groove wall of the receiving groove 111 is provided with at least one shell pressure relief port 144. The plug shell 110 defines a fluid passage in communication with the receiving groove 111 and a shell pressure relief passage in communication with the shell pressure relief port 144, and the above-mentioned body pressure relief passage includes the shell pressure relief passage; the plug inner core 120 is movably arranged in the receiving groove 111 along the axial direction of the plug shell 110, and the end face of one end of the plug inner core 120 away from the groove bottom wall of the receiving groove 111 is provided with a plurality of charging terminals; referring to Figure 3 and Figure 4 , 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 the inner core pressure relief port 129 is consistent with the number of the shell pressure relief port 144 and each corresponds to one; referring to Figure 2The plug inner core 120 defines a fluid flow cavity 121 that communicates with the inner core pressure relief port 129. The fluid flow cavity 121 is sealed and movably connected to the fluid channel. The plug inner core 120 has a communication position in which each inner core pressure relief port 129 is opposite to and communicates with the corresponding outer shell pressure relief port 144. The plug body may include a first elastic member 130, which is disposed in the receiving groove 111. The two ends of the first elastic member 130 are respectively connected to the plug inner core 120 and the plug outer shell 110. The first elastic member 130 usually drives the plug inner core 120 away from the communication position. The fluid flow cavity 121 is sealed and connected to the fluid channel. This can be understood as: the fluid flow cavity 121 and the fluid channel can maintain a seal to prevent the heat exchange fluid from leaking out, and the structures such as the plug inner core 120 where the fluid flow cavity 121 is located and the plug outer shell 110 where the fluid channel is located can move relative to each other, for example, they can move relative to each other in the up and down direction shown in the figure.

[0054] Specifically, the plug housing 110 has an axial structure, and its radial cross-sectional outer contour shape can be a circle, triangle, or rectangle, etc., which is not limited in this embodiment. The following description uses a rectangle as an example. The first housing end of the plug housing 110 in the axial direction, i.e., the socket 200 (see reference...) Figure 12 The end face of the mating part is provided with a receiving groove 111. 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, thereby receiving the heat exchange fluid such as coolant transported by the pipeline. A fluid passage is defined inside the plug housing 110 to allow the heat exchange fluid to continue flowing.

[0055] Reference Figure 1 The plug inner core 120 has a shaft-like structure and is movably fitted into the receiving groove 111 along the axial direction of the plug housing 110. The plug inner core 120 is a mating groove 210 with the socket 200 (see reference). Figure 12 and Figure 14 The plug-in portion, namely the inner core 120 of the plug, defines a fluid flow cavity 121. The fluid flow cavity 121 is sealed and movably connected to the fluid channel, allowing the heat exchange fluid from the fluid channel to continue into the fluid flow cavity 121. When the inner core 120 is plugged into the socket 200, the fluid interface on the upper end face of the inner core 120 and the fluid slot 230 on the socket 200 (see reference) Figure 13 In conjunction with these components, a corresponding heat exchange fluid transport channel is established. Furthermore, when the plug core 120 is inserted into the socket 200, various charging terminals are inserted into corresponding slots on the socket 200.

[0056] For the convenience of understanding, the following is described in the direction from the second housing end to the first housing end of the plug housing 110 as the upward 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 bottom wall of the accommodating groove 111 (the groove wall opposite the opening of the accommodating groove 111) is the lower end of the plug inner core 120, and the end of the plug inner core 120 away from the bottom wall of the accommodating groove 111 is the upper end of the plug inner core 120.

[0057] It should be noted that the matching relationship between the accommodating groove 111 and the socket 200 at least includes the following two cases:

[0058] (1) When the plug inner core 120 is plugged and matched with the socket 200, the plug housing 110 covers the socket 200 through the accommodating groove 111. That is, the socket 200 is inserted into the accommodating groove 111. As can be seen, in this case, the matching between the charging plug and the socket 200 is more compact.

[0059] (2) When the plug inner core 120 is plugged and matched with the socket 200, the upper end surface of the plug inner core 120 protrudes from the opening of the accommodating groove 111, thereby protruding from the upper end surface of the plug housing 110. At this time, the socket 200 does not extend into the accommodating groove 111. As can be seen, compared with the first case, the size of the charging plug is smaller.

[0060] 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 housing 110, the inner contour shape of the accommodating groove 111 is consistent with the outer contour shape of the plug inner core 120, and the size between the two can be a clearance fit, so that the plug inner core 120 can smoothly slide in the accommodating groove 111.

[0061] The groove wall of the accommodating groove 111 is provided with at least one housing pressure relief port 144. Correspondingly, the side wall of the plug inner core 120 opposite the housing pressure relief port 144 is provided with at least one inner core pressure relief port 129, and the number of the inner core pressure relief port 129 and the housing pressure relief port 144 is consistent and one-to-one corresponding.

[0062] As an option of the embodiment, the shell pressure relief port 144 is formed on the bottom wall of the accommodating groove 111, and the inner core pressure relief port 129 is formed on the lower end surface of the plug inner core 120. Alternatively, as another option of the embodiment, the shell pressure relief port 144 is formed on the side wall of the accommodating groove 111, and the inner core pressure relief port 129 is formed on the outer peripheral wall of the plug inner core 120. Alternatively, as still another option of the embodiment, part of the plurality of shell pressure relief ports 144 is formed on the side wall of the accommodating groove 111, and the other part is formed on the bottom wall of the accommodating groove 111, and correspondingly, part of the plurality of inner core pressure relief ports 129 is formed on the lower end surface of the plug inner core 120, and the other part is formed on the outer peripheral wall of the plug inner core 120.

[0063] Referring to Figure 2 , Figure 3 and Figure 4 , the plug inner core 120 is designed to have a communication position in the moving stroke in the accommodating groove 111. In the communication position, each inner core pressure relief port 129 is opposite to and in communication with the corresponding shell pressure relief port 144. It can be seen that, in the axial movement of the plug inner core 120 in the accommodating groove 111 along the plug shell 110, when the plug inner core 120 is in the non-communication position, each inner core pressure relief port 129 is not opposite to and / or in communication with the corresponding shell pressure relief port 144. Obviously, when the inner core pressure relief port 129 is in communication with the shell pressure relief port 144, the shell pressure relief passage is in communication with the fluid flow-through cavity inside the plug inner core 120, and at this time, the fluid flow-through cavity can be relieved through the shell pressure relief passage. When the inner core pressure relief port 129 is not in communication with the shell pressure relief port 144, the fluid flow-through cavity 121 is not in communication with the shell pressure relief passage.

[0064] At least one first elastic member 130 is arranged in the accommodating groove 111, for driving the plug inner core 120 away from the communication position. In this way, when the plug inner core 120 is not plugged with the socket 200, the first elastic member 130 drives the plug inner core 120 away from the communication position. During the plugging of the plug inner core 120 with the charging plug, the worker 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 communication position.

[0065] It can be seen that, in the embodiment, the pressure relief passage is adjustable in opening and closing, and when the charging plug 100 is not plugged with the socket 200, the shell pressure relief port 144 is misaligned with the inner core pressure relief port 129, and the pressure relief passage is not in communication. In this way, when the ground conducts the air tightness test on the passage through which the heat exchange fluid in the charging plug flows, the test error caused by the communication of the pressure relief passage can be avoided.

[0066] It can be understood that the communication position can be located in the middle of the stroke of the plug inner core 120 in the accommodating groove 111, at this time the first elastic member 130 can drive the plug inner core 120 away from the communication position in the direction away from the groove bottom wall of the accommodating groove 111, or in the direction close to the groove bottom wall of the accommodating groove 111. Of course, since when the charging plug 100 is plugged with the socket 200, the socket 200 will force the plug inner core 120 to be close to the groove bottom wall of the accommodating groove 111. Therefore, please refer to Figure 2 In an embodiment, the communication position is the end position of the stroke of the plug inner core 120 in the accommodating groove 111, moving towards the groove bottom wall of the accommodating groove 111, and the first elastic member 130 always drives the plug inner core 120 away from the communication position in the direction away from the groove bottom wall of the accommodating groove 111.

[0067] Specifically, the plug inner core 120 is close to the opening of the accommodating groove 111 at the starting position of the stroke of the accommodating groove 111, and then moves inward along the insertion direction of the accommodating groove 111 until the end position of the stroke. In this way, when the worker pushes the plug shell 110 to overcome the elastic potential energy of the first elastic member 130 to complete the plugging of the socket 200 with the plug inner core 120, the plug inner core 120 will stay at the end position of the stroke relative to the accommodating groove 111, that is, no matter how much force the worker applies, the plug inner core 120 will not move further along the insertion direction (from top to bottom) of the accommodating groove 111 without damaging the charging plug 100. The plug inner core 120 at the end position of the stroke is also at the communication position, so that when the plug inner core 120 is plugged with the insertion groove 210 of the socket 200, the plug inner core 120 is moved to the communication position at the same time to communicate the shell pressure relief port 144 and the inner core pressure relief port 129, thereby facilitating the operation of the worker and improving the operation efficiency.

[0068] It should be noted that the relative and communication between the inner core pressure relief port 129 and the shell pressure relief port 144 can be that one of the two is provided with a one-way valve or a two-way valve or the like pressure relief 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 shell pressure relief port 144 are opposite to each other and the spacing therebetween meets the requirements, and the internal pressure meets the requirements, the pressure relief valve is conducted. For example, the shell pressure relief port 144 is opened on the groove 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 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 they are close to each other until they are communicated, the shell pressure relief port 144 and the inner core pressure relief port 129 are communicated, and the pressure relief valve is conducted when the internal pressure meets the requirements. Conversely, when they are away from each other and not conducted, the pressure relief valve is difficult to be closed by the internal pressure, so that the heat exchange fluid at the shell pressure relief port 144 or the inner core pressure relief port 129 can also be prevented from leaking into the accommodating groove 111. Alternatively, in an embodiment, the shell pressure relief port 144 is opened on the groove side wall of the accommodating groove 111, and at least one inner core pressure relief port 129 is opened on the position where the inner core peripheral wall of the plug inner core 120 cooperates with the groove side wall of the accommodating groove 111.

[0069] At this time, when the plug inner core 120 slides in the accommodating groove 111, the shell pressure relief port 144 and the inner core pressure relief port 129 are moved from being staggered to being partially opposite in the axial direction of the plug shell 110, and then until they are directly opposite. Specifically, in the non-communication position, the shell pressure relief port 144 is blocked by the 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 accommodating groove 111. During the movement of the plug inner core 120 towards the communication position, the shell pressure relief port 144 and the inner core pressure relief port 129 begin to partially communicate, until they are completely opposite and communicated with each other.

[0070] It can be seen that in the present embodiment, the shell pressure relief port 144 is opened on the groove side wall of the accommodating groove 111, and the inner core pressure relief port 129 is opened on the inner core peripheral wall, which is naturally blocked when they are staggered, reducing the risk of heat exchange fluid leakage from the shell pressure relief port 144 and / or the inner core pressure relief port 129 into the accommodating groove 111, thereby making the internal structure of the charging plug more simple and reliable.

[0071] The opening of the shell pressure relief port 144 on the groove side wall of the accommodating groove 111 will limit the shell pressure relief channel to the radial outside of the accommodating groove 111, such as being embedded in the plug shell 110 at the groove side wall of the accommodating groove 111. However, it can be understood that this way will cause the wall thickness of the plug shell 110 to increase to ensure the structural strength of the plug shell 110. Therefore, please refer to Figure 2 to Figure 4In an embodiment, the charging plug 100 further comprises a holding member fixedly arranged on the outer peripheral wall of the plug housing 110, the holding member is provided with a handle pressure relief opening 143, and a portion of the holding member close to the first housing end (for example, the portion facing upwards in the figure) extends into the accommodating groove 111 and is provided with a housing pressure relief opening 144, and the holding member defines an intermediate pressure relief channel 141 therein, which is in communication with the housing pressure relief opening 144 and the handle pressure relief opening 143.

[0072] Specifically, the holding member is a handle, a grip or the like arranged on the plug housing 110 and facilitating the staff to hold the plug housing 110 and facilitate the pushing of the charging plug into the socket 200. It can be understood that, in order to facilitate the staff to apply force, a plurality of handles can be symmetrically arranged, or a plurality of handles can be uniformly and spaced apart along the circumference of the housing of the charging plug 100.

[0073] Please refer to Figure 2 to Figure 4 , which will be described below by taking the handle as an example. The handle is arranged along the axial direction of the plug housing 110, and the upper end thereof is close to the upper end of the plug housing 110, and the lower end thereof is close to the lower end of the plug housing 110. In order to facilitate the staff to hold, the middle portion of the handle can be spaced apart from the outer peripheral wall of the plug housing 110.

[0074] The handle defines an intermediate pressure relief channel 141 therein, and the lower end of the handle is provided with a handle pressure relief opening 143 in communication with the intermediate pressure relief channel 141, and the handle pressure relief opening 143 is in communication with the housing pressure relief channel of the plug housing 110. Please refer to Figure 3 The handle pressure relief opening 143 can be specifically provided at the lower end face of the handle, at this time, the lower end face of the handle can be tightly attached to the outer peripheral wall of the plug housing 110 by means of screws or other fasteners, and the housing pressure relief channel extends to the position of the outer peripheral wall of the plug housing 110 opposite to the handle pressure relief opening 143, so that the intermediate pressure relief channel 141 in the handle is in communication with the housing pressure relief channel in the plug housing 110. Of course, the lower end of the handle can also pass through the outer peripheral wall of the plug housing 110 to enter the plug housing 110 so that the handle pressure relief opening 143 is in communication with the housing pressure relief channel. It is worth mentioning that the handle internally provided with the intermediate pressure relief channel 141 can be only one of a plurality of handles, of course, it can also be a plurality or all of them.

[0075] The upper end of the handle can extend to the accommodating groove 111 and to the portion of the outer circumferential wall of the plug inner core 120 between the groove side wall of the accommodating groove 111, and the housing pressure relief port 144 is formed. In this way, in the radial inner side to the radial outer side direction of the charging plug 100, the portion of the outer circumferential wall of the plug inner core 120 and the side end face 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 cooperates with the plug inner core 120 instead of the groove side wall of the accommodating groove 111, and there is no need to form the housing pressure relief port 144 in the plug housing 110.

[0076] As can be seen, in the embodiment, the housing pressure relief port 144 that cooperates with the inner core pressure relief port 129 of the plug inner core 120 is designed on the handle, and the internal space of the handle is fully utilized to define the intermediate pressure relief channel 141 that communicates with the housing pressure relief channel. Compared with the housing pressure relief port 144 formed in the groove side wall of the accommodating groove 111, the structural strength of the plug housing 110 can be significantly improved, and the wall thickness and other sizes of the plug housing 110 are avoided to be increased.

[0077] Please refer to Figure 2 to Figure 4 and Figure 7 , Figure 8 In an embodiment, a portion of the surface of the inner circumferential wall is recessed to form a handle sliding groove 123, the handle sliding groove 123 extends to the axial ends of the plug inner core 120 along the axial direction of the plug housing 110, and the groove wall of the handle sliding groove 123 is provided with the inner core pressure relief port 129; a portion of the holding member close to the first housing end (for example, the upward portion in the figure) extends into the accommodating groove 111 to form a sliding part 142, and the sliding part 142 is slidably assembled in the handle sliding groove 123.

[0078] Specifically, the portions of the outer circumferential wall of the plug inner core 120 that do not cooperate with the handle are in close contact with the groove side wall of the accommodating groove 111 and slide relative to each other. The portions of the outer circumferential wall of the plug inner core 120 that cooperate with the handle are recessed along the radial direction of the plug inner core 120 to form the handle sliding groove 123 for the handle to slide. In the axial direction of the plug housing 110, both ends of the handle sliding groove 123 extend to the axial ends of the plug inner core 120, i.e., the upper end of the plug inner core 120 and the lower end of the plug inner core 120.

[0079] In addition, the upper end of the handle extends into the handle sliding groove 123 to form a corresponding sliding part 142 such as a sliding block, so that the handle can smoothly slide in the handle sliding groove 123. In this way, the handle is separated from the space formed by the accommodating groove 111 to form a corresponding sliding space, and the handle slides in the sliding space. Not only can the most part of the surface of the plug inner core 120 be in close contact with the groove side wall of the accommodating groove 111 to improve the aesthetic appearance, but also the most part of the outer circumferential wall of the plug inner core 120 can provide a corresponding restraining force to make the movement of the plug inner core 120 in the accommodating groove 111 more stable.

[0080] 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 stably slide relative to each other.

[0081] In addition, in order to further improve the movement stability between the sliding portion 142 and the handle sliding groove 123, in an embodiment, the sliding portion 142 is bent and extends towards the groove bottom wall of the accommodating groove 111. In this way, the sliding portion 142 and the accommodating 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 accommodating groove 111, so that the upper end of the handle can be more stably attached or fixed in the plug housing 110, and the plug inner core 120 and the sliding portion 142 are prevented from being separated from each other during sliding.

[0082] It can be understood that when the sliding portion 142 is configured as a sliding block or the like, it has at least three side wall surfaces that slide with the handle sliding groove 123, and the housing pressure relief port 144 can be arranged on any one of the three side wall surfaces. In an embodiment, the groove side wall of the accommodating groove 111 has a matching area matched with the sliding portion 142; the side wall of the sliding portion 142 away from the matching area is provided with the housing pressure relief port 144, and the side wall of the handle sliding groove 123 opposite to the matching area is provided with the inner core pressure relief port 129.

[0083] Specifically, referring to Figure 3 and Figure 4 For any sliding portion 142, the side surface thereof away from the plug inner core 120 is opposite to a part of the surface of the accommodating groove 111, which is a matching area of the groove side wall of the accommodating groove 111 matched with the sliding portion 142. The side wall of the sliding portion 142 away from the matching area is provided with the housing pressure relief port 144, and correspondingly, the side wall of the handle sliding groove 123 opposite to the matching area is provided with the inner core pressure relief port 129.

[0084] Compared with the inner core pressure relief port 129 arranged on the left and right side walls of the handle sliding groove 123 (the two sides of the matching area of the sliding portion 142 and the accommodating groove 111), the inner core pressure relief port 129 is arranged on the side wall of the handle sliding groove 123 opposite to the matching area, so that when the inner core pressure relief port 129 and the housing pressure relief port 144 are communicated, the fluid flowing in the cavity 121 flows along the established pressure relief channel, and the bending part is less and the overall flow path is smoother, thereby improving the pressure relief effect.

[0085] It is worth mentioning that the charging terminals can extend to the part of the plug inner core 120 which is not provided with the fluid flow cavity. Alternatively, in an embodiment, a part of the charging terminals to be cooled is arranged in the fluid flow cavity 121, and another part of the charging terminals to be cooled penetrates through the end face of the plug inner core 120 away from the groove bottom wall of the accommodating groove 111 to be exposed from the plug inner core 120; a part of the charging harness is arranged in the fluid flow cavity 121 and connected with the corresponding charging terminals to be cooled, and another part of the charging harness penetrates through the plug inner core 120 towards the end face of the groove bottom wall of the accommodating groove 111 to extend into the plug outer shell 110. The fluid flow cavity 121 is provided for the insulation heat exchange fluid to flow through. Of course, the outer periphery of the charging harness is usually provided with an insulation layer such as an insulation adhesive layer, and the outer periphery of the charging terminal can also be provided with an insulation layer, and at this time the fluid flow cavity 121 can be provided for more types of cooling liquid to flow through.

[0086] In the embodiment, in order to realize the direct contact cooling of the charging terminals, the insulation heat exchange fluid flows through the fluid flow cavity 121. At least part of the plurality of charging terminals required for charging is the charging terminal to be cooled, and the main part of the charging terminal to be cooled is in direct contact with the insulation heat exchange fluid in the fluid flow cavity 121, and the pin end thereof is exposed from the upper end face of the plug inner core 120. Each charging terminal to be cooled is connected with the corresponding charging harness. Most of the charging harness is located between the groove bottom wall of the accommodating groove 111 and the lower end face of the plug outer shell 110, one end of the charging harness extends to the lower end face of the plug outer shell 110 and is exposed to be connected with the corresponding wire core in the cable, and the other end of the charging harness extends to the fluid flow cavity 121 through the groove bottom wall of the accommodating groove 111 and the lower end face of the plug inner core 120 to be connected with the corresponding charging terminal to be cooled.

[0087] As can be seen, the charging plug 100 in the embodiment also cools the charging terminals to be cooled and the charging harness in the charging plug 100 when conveying the cooling liquid and other heat exchange fluids, so that the embodiment provides cooling measures for each heat-generating key component of the charging plug 100 in the charging process, thereby significantly improving the heat generation phenomenon of each key component in the charging process. In this way, through the cooling scheme provided by the embodiment, the charging plug 100 can support a larger charging power and reduce the charging time, that is, can support a faster fast charging technology.

[0088] In addition, in the embodiment, the insulation heat exchange fluid is in direct contact with the charging terminals to be cooled, so compared with the liquid cooling technology in the related art, the charging plug is smaller in size and lighter in weight at the same power without the need to design isolation measures (cooling liquid and heat dissipation components), thereby achieving the purpose of lightweight design, saving other auxiliary materials to achieve better production cost control, and improving the convenience of personnel operation.

[0089] It is worth mentioning that when the charging function is provided, the materials of the plug housing 110 and the plug inner core 120 should meet the requirements of insulation performance, flame retardancy, weather resistance, low-temperature toughness, etc. For example, one or more of PC (polycarbonate), ABS (acrylonitrile-butadiene-styrene copolymer), PBT (polycarbonate / polybutylene terephthalate) can be used.

[0090] It can be understood that each region has corresponding standards for the interface layout of the charging plug 100. In order to adapt to such standards, in an embodiment, referring to Figure 1 and Figure 9 , the end face of the plug inner core 120 away from the groove bottom wall of the accommodating groove 111 includes a standard charging interface part 124 and an extension area, the extension area is provided with a plurality of fluid interfaces 122 in communication with the fluid flow-through cavity; all the to-be-cooled charging terminals include a plurality of standard charging terminals, all or part of the standard charging terminals are arranged in the standard charging interface part 124.

[0091] Specifically, the upper end face of the plug inner core 120 includes a standard charging interface part 124 and an extension area, all or part of the standard charging terminals in all the to-be-cooled charging terminals are arranged in the standard charging interface part 124 and arranged in the layout mode specified by the corresponding standard. It can be understood that at least part of the standard charging terminals are arranged in the standard charging interface part 124 and arranged in the layout mode specified by the corresponding standard. Of course, the shape and size of the standard charging interface part 124 are also implemented according to the corresponding standard. The extension area is located on one side of the standard charging structure area, and at least one of the non-standard charging terminals in the to-be-cooled charging terminals, the fluid interface 122 and the charging terminal that does not need to be cooled is arranged in the extension area. Of course, part of the standard charging terminals with standard shape and size can also be arranged in the extension area. The fluid interface 122 is in communication with the fluid flow-through cavity 121 and is plugged with the fluid charging plug on the socket 200, so that the cooling liquid in the fluid flow-through cavity 121 can be transported into the socket 200.

[0092] In this way, the charging plug 100 provided by the embodiment can be matched with the standard form socket 200, so as to improve the adaptability of the charging plug 100 of the embodiment.

[0093] It can be understood that for electric vehicles such as eVTOL, the machine body not only includes a main power source such as a power battery, but also includes an emergency low-voltage power source. Generally speaking, the emergency low-voltage power source is a 28V low-voltage emergency storage battery, so that in the case of failure of the main power source of the eVTOL, the emergency low-voltage power source can quickly take over to provide necessary power support for the key systems of the eVTOL (such as flight control system, navigation system, communication system, etc.), and ensure that the eVTOL can land safely and stably. Generally speaking, the emergency power source should also be charged and discharged once every period of time (such as every three months) when it is not used for a long time, in order to maintain battery activity and prolong service life. In the related art, the emergency low-voltage power source is usually charged by the power battery with relatively high voltage in the electric vehicle; however, the power battery may have low power, failure, or damage to the charging line between the two, which may cause the emergency low-voltage power source to fail to charge. Therefore, please refer to Figure 1 and Figure 10 In an embodiment, the charging plug 100 further includes a plurality of low-voltage emergency power terminals 150, all or part of the low-voltage emergency power terminals 150 are arranged in the extension area, and it can be understood that at least part of the low-voltage emergency power terminals 150 are 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 part 124, it is only necessary to avoid connection interference of the low-voltage emergency power terminals 150 to other standard charging terminals.

[0094] Of course, the corresponding socket 200 also has a corresponding low-voltage emergency charging plug sleeve, which cooperates with the low-voltage emergency power terminal 150 to establish a charging channel for the emergency low-voltage power source.

[0095] In this way, the charging plug 100 provided by the embodiment can not only charge the main power source, but also charge the emergency low-voltage power source after being connected with the socket 200, thereby expanding the function of the charging plug 100 to reduce the steps during ground maintenance of the eVTOL. Of course, it can be understood that whether the low-voltage emergency power terminal 150 operates or not can be controlled by the worker according to the work task when the charging plug 100 cooperates with the socket 200.

[0096] In addition, the low-voltage emergency power terminal 150 can also provide stable low-voltage power input during ground debugging, thereby playing a role as a ground power input interface.

[0097] In addition, all or part of the low-voltage emergency power terminals 150 are still arranged in the extension area. In this way, the charging plug provided by the embodiment can not only charge the main power source, but also charge the low-voltage emergency power source, and can also cooperate with the standard socket 200, thereby improving the adaptability of the charging plug 100 of the embodiment.

[0098] It should be noted that the low-voltage emergency power supply terminals 150 can extend to the fluid flow cavity 121 to be in direct contact with the insulation heat exchange fluid for cooling. Alternatively, since the low-voltage emergency power supply terminals 150 generate limited heat during operation, the low-voltage emergency power supply terminals 150 can also extend to the part of the plug inner core 120 that is not provided with the fluid flow cavity 121, that is, the low-voltage emergency power supply terminals 150 and the corresponding charging wire harness are not immersed for cooling, thereby improving safety.

[0099] It can be understood that the relative position relationship between the standard charging interface part 124 and the extension area can be that the standard charging interface part 124 is inside and the extension area is outside the standard charging interface part 124. Alternatively, the standard charging interface part 124 and the extension area can be arranged left and right. Alternatively, in an embodiment, referring to Figure 10 , the extension area includes a first extension area 125a and a second extension area 125b, and the first extension area 125a and the second extension area 125b are symmetrically arranged on both sides of the standard charging interface part 124.

[0100] Specifically, the standard charging interface part 124 is located at the geometric center of the plug inner core 120, and the first extension area 125a and the second extension area 125b are symmetrically arranged on the left and right sides of the standard charging interface part 124. Please refer to Figure 1 In an example, the cross-sectional shape of the plug inner core 120 is approximately rectangular, the geometric center of the rectangle is the circular standard charging interface part 124, and the two sides are the first extension area 125a and the second extension area 125b, respectively.

[0101] At this time, part of all low-voltage emergency power supply terminals 150 are arranged in the first extension area 125a, and another part of all low-voltage emergency power supply terminals 150 are symmetrically arranged in the second extension area 125b. Specifically, part of all fluid interfaces 122 are arranged in the first extension area 125a, and another part of all fluid interfaces 122 are symmetrically arranged in the second extension area 125b.

[0102] In the symmetric layout, after the worker aligns the standard charging interface part 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 together. In this way, the upper end surface of the plug inner core 120 not only meets the standard regulations, but also improves the appearance of the charging plug and the efficiency of plugging through the symmetric layout.

[0103] It should be noted that after the insulating heat exchange fluid enters the electric vehicle such as eVTOL through the fluid interface 122, it exchanges heat with the modules such as battery cells in the power battery. In order to achieve the set temperature control target, a large amount of insulating heat exchange fluid is required, and after heat exchange, a large amount of insulating heat exchange fluid needs to return to the ground thermal management system. For this situation, the insulating heat exchange fluid can leave the electric vehicle such as eVTOL through a dedicated return pipeline and return to the ground thermal management system. Alternatively, please refer to Figure 5 、 Figure 6 、 Figure 7 and Figure 8 In an embodiment, the fluid flow cavity 121 is divided into a first fluid flow cavity 121a and a second fluid flow cavity 121b by the partition plate. The flow directions of the insulating heat exchange fluid in the first fluid flow cavity 121a and the second fluid flow cavity 121b are opposite. At least part of the first fluid flow cavity 121a is opposite to the first expansion area 125a, and at least part of the second fluid flow cavity 121b is opposite to the second expansion area 125b.

[0104] In this way, the fluid flow cavity 121 not only includes a liquid outlet channel for the insulating heat exchange fluid to enter the electric vehicle such as eVTOL, but also includes a liquid inlet channel for the insulating heat exchange fluid to return to the ground thermal management system. Of course, the first fluid flow cavity 121a can be one of the liquid inlet channel and the liquid outlet channel, and the second fluid flow cavity 121b can be the other of the liquid inlet channel and the liquid outlet channel.

[0105] In the related art, during the cooling process on the ground, the fluid channel of the cooling circuit in the external device such as eVTOL is relatively long. In order to speed up the cooling efficiency, the liquid inlet temperature of the cooling circuit in the external device is usually low, and the temperature difference between the battery system of the external device and the liquid inlet and outlet positions during the cooling process is large. Correspondingly, in the above embodiment, the charging plug can divide the fluid flow cavity 121 into the first fluid flow cavity 121a and the second fluid flow cavity 121b through the partition plate, and can switch the liquid inlet and outlet directions through the first fluid flow cavity 121a and the second fluid flow cavity 121b, so as to greatly reduce the internal temperature difference of the battery system of the external device corresponding to the charging plug through the timing switching of the liquid inlet and outlet directions.

[0106] As an option of the embodiment, the first extension area 125a is directly opposite to at least part of the first fluid flow cavity 121a, so that all the low-voltage emergency power supply terminals in the first extension area 125a extend into the first fluid flow cavity 121a, and all the fluid interfaces 122 are in communication with the first fluid flow cavity 121a. The second extension area 125b is directly opposite to at least part of the second fluid flow cavity 121b, so that all the low-voltage emergency power supply terminals in the second extension area 125b extend into the first fluid flow cavity 121a, and all the fluid interfaces 122 are in communication with the second fluid flow cavity 121b.

[0107] It is worth mentioning that, as shown in Figure 5 , the insulation heat exchange fluid in the first fluid flow cavity 121a and the second fluid flow cavity 121b can be the same insulation heat exchange fluid in the same closed-loop fluid circuit. For example, the insulation heat exchange fluid in the first fluid flow cavity 121a is the insulation heat exchange fluid in the liquid inlet direction of the same closed-loop fluid circuit, and the insulation heat exchange fluid in the second fluid flow cavity 121b is the insulation heat exchange fluid in the liquid outlet direction of the same closed-loop fluid circuit. This structure can reduce the complexity of the system structure, reduce the volume and weight of the connector and the cable, and facilitate operation and maintenance.

[0108] Of course, due to the large amount of heat generated by the charging terminals at the electrical connection interface, if the insulation heat exchange fluid in the plug inner core 120 is in the same closed-loop fluid circuit, it may significantly affect the temperature of the insulation heat exchange fluid flowing through, and thus affect the heat exchange effect of the insulation heat exchange fluid flowing into the eVTOL electric vehicle on the power battery. Therefore, as shown in Figure 6 , as another option of the embodiment, the first fluid flow cavity 121a defines a first sub-cavity 121a1 and a second sub-cavity 121a2, and the second fluid flow cavity 121b defines a third sub-cavity 121b1 and a fourth sub-cavity 121b2; wherein a part of all the low-voltage emergency power supply terminals extends into the first sub-cavity 121a1, a part of all the fluid interfaces 122 is in communication with the second sub-cavity 121a2, another part of all the low-voltage emergency power supply terminals extends into the third sub-cavity 121b1, and another part of all the fluid interfaces 122 is in communication with the fourth sub-cavity 121b2.

[0109] It is worth mentioning that, at this time, the first sub-cavity 121a1 and the second sub-cavity 121a2 can be connected with the same fluid channel, or can be connected with different fluid channels in the same direction of the flow direction of the insulation heat exchange fluid. The embodiment does not limit this. Similarly, the third sub-cavity 121b1 and the fourth sub-cavity 121b2 can be connected with the same fluid channel, or can be connected with different fluid channels in the same direction of the flow direction of the insulation heat exchange fluid. The embodiment does not limit this.

[0110] It can be understood that, when the first fluid flows through the cavity 121a, the first sub-cavity 121a1 and the second sub-cavity 121a2 can be separated from each other left and right, or inside and outside, which is not limited in the embodiment. Similarly, the third sub-cavity 121b1 and the fourth sub-cavity 121b2 can be separated from each other left and right, or inside and outside, which is also not limited in the embodiment. In addition, the first sub-cavity 121a1 and the second sub-cavity 121a2 are independent of each other, the first sub-cavity 121a1 is in the charging device circuit for cooling the corresponding low-voltage emergency power terminal, and the second sub-cavity 121a2 is in the battery pack cooling circuit, which is a temporary storage place for the insulating heat exchange fluid between the power battery and the ground thermal management system in the liquid inlet direction (or the liquid outlet direction). Similarly, the third sub-cavity 121b1 and the fourth sub-cavity 121b2 are independent of each other, the third sub-cavity 121b1 is in the charging device circuit for cooling the corresponding low-voltage emergency power terminal, and the fourth sub-cavity 121b2 is in the battery pack cooling circuit, which is a temporary storage place for the insulating heat exchange fluid between the power battery and the ground thermal management system in the liquid outlet direction (or the liquid inlet direction).

[0111] As can be seen, the insulating heat exchange fluid that exchanges heat with the charging terminal and the charging wire harness flows in the charging device cooling circuit, and the insulating heat exchange fluid that is transported into the power battery flows in the battery pack cooling circuit, both of which are independent of each other, which 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 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.

[0112] Of course, in some embodiments, for the first fluid flow-through cavity 121a and the second fluid flow-through cavity 121b separated by a partitioning structure such as a partition, all fluid interfaces 122 in communication with the first fluid flow-through cavity 121a can be used to connect the liquid inlet end of the cooling circuit of the external device, and all fluid interfaces 122 in communication with the second fluid flow-through cavity 121b can be used to connect the liquid outlet end of the cooling circuit of the external device, so that after the first fluid flow-through cavity 121a is connected to the external heat exchange fluid, the external heat exchange fluid can be more effectively 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 making the heat exchange fluid flow in order through the first fluid flow-through cavity 121a, the cooling circuit of the external device, and the second fluid flow-through cavity 121b, thereby reducing the risk of the heat exchange fluid flowing directly from the first fluid flow-through cavity 121a to the second fluid flow-through cavity 121b, and improving the heat exchange efficiency. It can be understood that a plurality of fluid interfaces 122 in communication with the first fluid flow-through cavity 121a can be connected to the liquid inlet end of each cooling circuit of the external device, respectively, and a plurality of fluid interfaces 122 in communication with the second fluid flow-through cavity 121b can be connected to the liquid outlet end of each cooling circuit of the external device, respectively.

[0113] In addition, referring to Figure 8 , the plug body also defines a pressure relief tee channel, specifically, the plug inner core 120 also defines a pressure relief tee channel, and the body pressure relief channel includes the pressure relief tee channel; the first end of the pressure relief tee channel is in communication with the first fluid flow cavity 121a, and the second end of the pressure relief tee channel is in communication with the second fluid flow cavity 121b; in addition, the third end of the pressure relief tee channel can be in communication with the inner core pressure relief port 129; the charging plug 100 also includes two pressure relief valves, one of which is arranged at the first end, and the other of which is arranged at the second end.

[0114] Please refer to Figure 8 , specifically, the plug inner core 120 can be divided into a chamber between the first fluid flow cavity 121a and the second fluid flow cavity 121b, and corresponding to the inner core pressure relief port 129, a Y-shaped pipe is installed in the chamber, the Y-shaped pipe defines a pressure relief tee channel, the first end extends to be in communication with the first fluid flow cavity 121a, the second end extends to be in communication with the second fluid flow cavity 121b, and the third end extends to be in communication with the inner core pressure relief port 129.

[0115] Please refer to Figure 7 and Figure 9 , in order to facilitate smooth pressure relief, the central axes of each pipe segment of the Y-shaped pipe are all 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 pipe and the inner core pressure relief port 129 are located at about the same height, and the third end of the Y-shaped pipe is opposite the inner core pressure relief port 129. In this way, the insulating heat exchange fluid entering the pressure relief tee channel from the second end or the first end can flow smoothly into the inner core pressure relief port 129.

[0116] It is worth mentioning that the pressure relief tee channel is used only when abnormal conditions occur in the delivery of the insulating heat exchange fluid, and in order to avoid leakage of the insulating heat exchange fluid under normal conditions, the charging plug 100 also includes two pressure relief valves, one of which is arranged at the first end, and the other of which is arranged at the second end. Understandably, the pressure relief valve can be a one-way valve or a two-way valve, and the present embodiment does not limit this.

[0117] In addition, the inlet and outlet directions of the inlet and outlet liquid circuit of the charging plug can be switched, which can be understood as a symmetrical circuit; in this embodiment, the charging plug defines a pressure relief tee channel in the plug inner core 120, which can meet the pressure relief requirements of different circuits when the liquid direction is switched, and improves the use convenience of the charging plug.

[0118] It should be noted that when the charging plug 100 is used as a charging plug, especially as a fast charging plug, the heat generation of the standard charging terminals is also large, so it is necessary to cool them. Please refer to Figure 7 and Figure 8 In an embodiment, the plug inner core 120 further defines a first standard cavity 121c and a second standard cavity 121d. In the radial plane of the plug inner core 120, the first standard cavity 121c, the second fluid flow-through cavity 121b, the second standard cavity 121d, and the first fluid flow-through cavity 121a are sequentially distributed in the circumferential direction of the plug inner core 120. The high-voltage direct-current positive terminal and the low-voltage auxiliary power positive terminal in the plurality of standard charging terminals are connected to the corresponding charging wire harness in the first fluid flow-through cavity 121a. The high-voltage direct-current negative terminal and the low-voltage auxiliary power negative terminal in the plurality of standard charging terminals are connected to the corresponding charging wire harness in the second fluid flow-through cavity 121b. The charging plug further includes a first communication terminal, a second communication terminal, a first charging connection terminal, a second charging connection terminal, and a ground terminal. The first communication terminal, the second communication terminal, the first charging connection terminal, and the second charging connection terminal are arranged at the position of the standard charging interface part 124 opposite the first standard cavity 121c. The ground terminal is arranged at the position of the standard charging interface part 124 opposite the second standard cavity 121d. 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 tee channel is defined in the first standard cavity 121c.

[0119] Specifically, taking the standard charging interface part 124 as a direct-current 9-pin layout area as an example, it includes direct-current power supply (DC+, DC-), vehicle and pile shared ground (PE), message interaction communication (S+, S-), vehicle and pile connection confirmation communication (CC1, CC2), and low-voltage auxiliary power supply (A+, A-) a total of 9 standard charging terminals. Among them, the DC+ terminal is a high-voltage direct-current positive terminal, the A+ terminal is a low-voltage auxiliary power supply positive terminal, the A- terminal is a low-voltage auxiliary power supply negative terminal, and the DC- terminal is a high-voltage direct-current negative terminal. The PE terminal is a ground terminal, the S+ terminal is a first communication terminal, the S- terminal is a second communication terminal, the CC1 terminal is a first charging connection terminal, and the CC2 terminal is a second charging connection terminal.

[0120] The first fluid flow cavity 121a not only faces the first extension area 125a, but also faces the area where the DC+ terminal and the A+ terminal of the standard charging interface part 124 are located, so that the DC+ terminal and the A+ terminal both extend into the first fluid flow cavity 121a to be connected with the corresponding charging harness.

[0121] Thus, the charging plug 100 provided by the embodiment can also cool the DC high-voltage devices such as the DC+ terminal, the A+ terminal, the DC- terminal and the A- terminal, and further cooling measures are provided for the key components of the charging plug 100 that generate heat during charging, so as to significantly improve the heat generation of the key components during charging. Thus, by using the cooling scheme provided by the embodiment, the charging plug 100 can support a larger charging power and reduce the charging time, that is, can support faster fast charging technology.

[0122] As for the S+ terminal, the S- terminal, the CC1 terminal, the CC2 terminal and the PE terminal, since the above standard charging terminals do not generate obvious heat during charging, in order to avoid the risk of electric leakage caused by contact with the insulating heat exchange fluid, the above terminals do not extend into the first fluid flow cavity 121a or the second fluid flow cavity 121b. In order to accommodate the part of the standard charging terminals in the plug inner core 120, the first standard cavity 121c and the second standard cavity 121d are defined in the plug inner core 120. In the axial direction of the plug inner core 120, the first standard cavity 121c is located directly below the S+ terminal, the S- terminal, the CC1 terminal and the CC2 terminal, and the second standard cavity 121d is located directly below the PE terminal. It is worth mentioning that the first standard cavity 121c, the first fluid flow cavity 121a, the second standard cavity 121d and the second fluid flow cavity 121b are independent of each other, so as to realize dry and wet isolation in the plug inner core 120, and improve the overall safety of the plug inner core 120.

[0123] 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 tee channel is defined in the first standard cavity 121c. At this time, the Y-shaped tube is arranged in the first standard cavity 121c. Thus, the Y-shaped tube is integrated in the first standard cavity 121c in the embodiment, so as to make full use of 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, so as to establish a pressure relief channel with the corresponding handle.

[0124] In some embodiments, the fluid flow through the cavity 121 is divided into a separate circuit connection cavity and a charging cooling cavity, which can be divided by a partition plate or other partition assembly. The circuit connection cavity is in communication with the fluid channel and the fluid interface 122, and the shell pressure relief channel is in communication with the circuit connection cavity. At least one of a part of the to-be-cooled charging terminal and a part of the charging wire harness is arranged in the charging cooling cavity, and the charging cooling cavity is in communication with the fluid channel. In this embodiment, the cooling liquid or other heat exchange fluid in the circuit connection cavity can independently pass through the cooling circuit of the external device to thermally manage the external device, which is beneficial to improve the accuracy of thermal management of the external device and improve the temperature uniformity of each position of the external device. In addition, the heat exchange fluid in the charging cooling cavity can independently cool the to-be-cooled charging terminal or the charging wire harness to improve the heat dissipation efficiency.

[0125] Referring to Figure 1 and Figure 2 In an embodiment, the plug shell 110 further defines a device cavity 112, which is arranged between the receiving groove 111 and a second shell end of the plug shell 110, which is at an end position in the axial direction of the plug shell 110, for example, the lower end in the figure. The charging plug further includes a plurality of detection elements, a control module, and an operation member 115. The detection elements are arranged in the plug inner core 120 or the plug shell 110, the control module is arranged in the device cavity 112, the control module is in communication connection with each detection element, and the control module has a plurality of state indicator lights 116. The operation member 115 is arranged on the outer peripheral wall of the plug shell 110, part of the operation 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 operation member 115 includes a touch screen and / or a control button.

[0126] The outer peripheral wall of the plug shell 110 is provided with a plurality of through holes in communication with the device cavity 112. The number of through holes is consistent with and one-to-one corresponds to the number of state indicator lights 116, so that each state indicator light 116 extends into and exposes from the corresponding through hole.

[0127] Specifically, the plug inner core 120 can be provided with flow sensors, pressure sensors, temperature sensors, and other detection elements for detecting the flow, pressure, and temperature of the fluid flowing through the cavity. The plug shell 110 can also be provided with ammeters or voltmeters and other detection elements.

[0128] The upper part of the plug housing 110 defines the aforementioned accommodation groove 111, while the lower part of the plug housing 110 defines the device cavity 112. Of course, the accommodation groove 111 and the device cavity 112 can also communicate with each other. The control module in the device cavity 112 can be configured as an integrated control panel, on which corresponding modules are arranged to realize communication and partial function control operations with the ground charging thermal management device and the eVTOL. Please refer to Figure 11 The specific contents of the communication include but are not limited to: inlet and outlet hydraulic pressure, inlet and outlet hydraulic temperature, flow rate, liquid connection state, charging state, discharging state, battery state information, fault or alarm information, historical log, thermal management strategy identification, environmental information, etc. The function control operations include but are not limited to emergency stop (charging and discharging stop, inlet and outlet stop, etc.), information query (connection state confirmation, battery information query, fault and alarm information query, etc.), communication connection operation (Bluetooth, local area network connection, etc.), etc.

[0129] Therefore, the ground thermal management system and the eVTOL complete the communication connection (cable connection) through the connection of the charging plug 100 and the socket 200. The eVTOL communication contents include flight log, battery state information (including but not limited to total battery voltage, battery cell voltage, charging and discharging current, battery temperature, battery operation data, controller device switch state, etc.), device state information (including but not limited to airborne ground power supply equipment, airborne ground thermal management equipment, etc.), and the parameter information collected by the aforementioned flow sensor, pressure sensor, temperature sensor, etc. are also uploaded to the ground thermal management system and the eVTOL through the communication bus.

[0130] It can be understood that the ground thermal management system can collect ground energy storage state information (including but not limited to energy storage system power, energy storage system output power, energy storage system output current, energy storage system controller device switch state, etc.), charging and discharging parameters (including but not limited to charging current, charging power, expected charging time, etc.), device state information, thermal management parameters and device state information (including but not limited to refrigeration and heating power, output flow rate, inlet and outlet liquid temperature, target temperature value, etc.), and device operation log (including operation time, historical data, fault and alarm information, etc.). Then the ground thermal management system and the eVTOL can transmit the aforementioned state information to the cloud server for storage or reading through wired, wireless, Bluetooth, local area network, etc. when parking.

[0131] The control module can display the parameter information collected by the aforementioned flow sensor, pressure sensor, temperature sensor, etc. through the plurality of state indicator lights 116 on the charging plug 100. Of course, the state indicator lights 116 on the plug shell 110 can also be used to display information such as whether the charging and discharging state is normal, whether the communication with the eVTOL or the ground thermal management system is normal, etc. In an example, the state indicator lights 116 include but are not limited to high-voltage charging indicator light, 28V charging indicator light, communication indicator light, and thermal management state indicator light. In addition, the plug shell 110 is also provided with operating elements 115 such as touch screen, control button, control knob, etc. Different operating elements 115 are configured with corresponding functions. In an example, the operating elements include but are not limited to communication button and emergency stop button. The operating personnel can perform corresponding operations through the operating elements 115.

[0132] During the ground charging and discharging and thermal management operation, since the ground thermal management system is far away from the eVTOL landing site, when the charging plug 100 and the socket 200 are in an abnormal state, the ground thermal management system operator cannot be notified in time, or the charging and discharging or thermal management cannot be stopped in time by moving to the ground equipment operation table. Therefore, after the charging plug 100 and the socket 200 are connected, the operating personnel can observe the running state in real time through the display state of the state indicator lights 116 on the charging plug 100 during the ground charging and discharging or thermal management operation. For example, in an example, when an abnormal state occurs, the operating personnel can complete the emergency stop operation in place through the emergency stop button on the handheld device or mobile device, or the emergency stop button on the plug shell 110. In some examples, the operating personnel can also view the ground thermal management and charging and discharging state information in real time through the control panel installed on the charging plug, and perform start or stop operation.

[0133] In an embodiment, one end of the shell pressure relief channel included in the body pressure relief channel extends to the end surface 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 part of the handle near the second shell end penetrates the shell peripheral wall to extend into the device cavity 112, and the end surface of the part of the handle near the second shell end is provided with a handle pressure relief port 143; the charging plug further includes a connecting pipe 145, the connecting pipe 145 is arranged in the device cavity 112, and the handle pressure relief port 143 communicates with the body pressure relief channel through the connecting pipe 145.

[0134] Please refer to Figure 2Specifically, the lower end of the plug housing 110 is provided with a cable integrated head 113, the cable integrated head 113 is provided with a plurality of cable through holes, various charging cables or water pipes extend into the device cavity 112 through the cable through holes. Among them, the charging cable extends into the fluid flow-through cavity of the plug inner core 120 through the gap between the device cavity 112, the accommodating groove 111 and the lower end of the plug inner core 120, and the lower end face 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 extends into the device cavity 112 through the side wall of the device cavity 112.

[0135] In the embodiment, the handle is communicated with the pressure relief pipe through a 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 realize sealed communication with the handle pressure relief channel, and the other end is inserted into the pressure relief pipe to realize sealed communication with the pressure relief pipe. The connecting pipe 145 can be a hose, and can also be a hard pipe, and the embodiment does not limit this. Of course, since the wiring in the device cavity 112 is relatively dense, the hose is more conducive to wiring in the device cavity 112.

[0136] The water pipe also includes a fluid pipe 114, which is used to input the insulation heat exchange fluid input from the lower end of the plug housing 110 into the fluid flow-through cavity of the plug inner core 120. However, in the embodiment, the plug inner core 120 and the plug housing 110 can slide relative to each other. In order to realize the sealed communication between the fluid flow-through cavity in the plug inner core 120 and the fluid pipe 114, a soft water pipe can be connected. However, when the lower end face of the plug inner core 120 and the groove bottom wall of the accommodating groove 111 are far away from each other, the distance is relatively long, which causes the length of the soft water pipe to be relatively long. The soft water pipe with a relatively long length will occupy the space in the device cavity 112, affect the stroke length of the plug inner core 120 in the accommodating groove 111, and even force the volume of the fluid flow-through cavity of the plug inner core 120 to be reduced to leave enough space to accommodate the soft water pipe.

[0137] Therefore, please refer to Figure 7 In an embodiment, the groove bottom wall of the accommodating groove 111 is provided with a channel opening communicated with the fluid channel; the charging plug 100 further includes a pipe joint 126, the pipe joint 126 is protrudingly arranged on one end face of the plug inner core 120 facing the groove bottom wall, the pipe joint 126 is communicated with the fluid flow-through cavity, 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; wherein the pipe joint 126 is adapted to be inserted into the fluid channel from the channel opening, and the tapered portion is in interference fit with the fluid channel and can move relatively, so that the fluid flow-through cavity and the fluid channel are in sealed movable communication.

[0138] Specifically, the fluid pipe 114 in the device cavity 112 defines a fluid passage, one end of the fluid pipe 114 extends to the bottom wall of the accommodating groove 111 to form a passage opening. The lower end surface of the plug inner core 120 is provided with a pipe joint 126. The pipe joint 126 can be integrally formed with the plug inner core 120, or it is also a separate part and is fixedly installed on the plug inner core 120. The pipe joint 126 extends downward along the axial direction of the plug shell 110.

[0139] 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 portions gradually decreases in the protruding direction. When the pipe joint 126 is matched with the fluid passage, there is always a part of the tapered portion extending into the fluid passage, and the part of the outer peripheral wall of the tapered portion extending into the fluid passage is in interference fit with the fluid passage, thereby realizing the sealed and active communication of the fluid flow passage.

[0140] As can be seen, in the embodiment, the pipe joint 126 can completely extend into or partially extend into the fluid passage during the movement of the plug inner core 120 away from or close to the bottom wall of the accommodating groove 111, and the fluid flow passage is always in sealed and active communication with the fluid passage. And in this process, the pipe joint 126 does not occupy the movement space of the plug inner core 120, thereby 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 of the tapered portion is sleeved with a sealing ring or the like sealing element.

[0141] The first elastic member 130 can be arranged as a tension spring embedded at the side wall of the accommodating groove 111, one end of the tension spring is connected with the plug inner core 120, the other end is fixedly connected with the side wall of the accommodating groove 111, and the two ends are spaced apart by a certain distance in the axial direction of the plug shell 110. This kind of 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 accommodating groove 111, which is beneficial to the lower end surface of the plug inner core 120 abutting against the bottom wall of the accommodating groove 111 during the movement. However, this structure will occupy the groove side space of the accommodating groove 111, thereby increasing the thickness size of the plug shell 110.

[0142] Alternatively, in an embodiment, the first elastic member 130 is a compression spring, which is arranged between the end surface of the plug inner core 120 facing the bottom wall and the bottom wall of the accommodating groove 111. In this way, one end of the compression spring is connected with the lower end surface of the plug inner core 120, and the other end of the compression spring is connected with the side wall of the accommodating groove 111.

[0143] In addition, the compression spring can be sleeved on the radial outer side of the pipe joint 126, so that it is not necessary to design a guide column structure for installing the compression spring in the accommodating groove 111.

[0144] In addition, in order to enable the compression spring to have sufficient elastic potential to always drive the plug inner core 120 away from the communication position, the length size of the single compression spring can be large, thereby occupying the slot space in the accommodation slot 111, and further affecting the stroke distance of the plug inner core 120 in the accommodation slot 111. Therefore, the first elastic member 130 can be provided with multiple, and the stronger elasticity is realized by multiple compression springs with smaller outer diameter size and / or length size in parallel, thereby replacing a single compression spring. It can be seen that multiple first elastic members 130 can reduce the occupation of the slot hole space of the accommodation slot 111 in the height direction, so that the whole of the plug shell 110 and the plug inner core 120 is more compact.

[0145] The application further provides a charging gun, comprising: the charging plug 100 and a charging cable, the charging cable being connected with the second shell end (for example, the lower end in the figure) of the plug shell 110 of the charging plug 100, and specifically, the wires in the charging cable can be electrically connected with the charging terminals of the charging plug 100, so that power supply can be realized during charging. The specific structure of the charging plug 100 is referred to the above embodiments, and since the charging gun adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0146] In the charging cable, each wire core is connected with the corresponding charging wire bundle in the plug shell 110. In addition, a cable fluid channel for circulating heat exchange fluid is defined in the charging cable, and the cable fluid channel is communicated with the fluid channel of the plug shell 110.

[0147] The shell pressure relief channel of the plug shell 110 can be directly communicated with the outside, so as to discharge a small amount of leaked insulation heat exchange fluid to the outside. Alternatively, in an 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 communicated with the pressure relief return channel. In this way, the small amount of leaked insulation heat exchange fluid can also be recycled, thereby avoiding resource waste and avoiding pollution of the outside environment by the insulation heat exchange fluid.

[0148] Please refer to Figure 12 The application further provides a connector assembly, comprising: the charging plug 100 and a socket 200, the socket 200 being adapted to be plugged with the plug inner core 120 of the charging plug 100, for example, being plugged with the charging terminals. The specific structure of the charging plug is referred to the above embodiments, and since the connector assembly adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0149] It can be understood that, referring to Figure 13The socket 200 is provided with a corresponding fluid slot 230, so as to be matched with the fluid interface 122 on the charging plug 100.

[0150] As the plug shell 110 is further provided with a control module and other components in some embodiments, the overall weight of the plug shell 110 is relatively heavy. In order to improve the plugging stability between the charging plug and the socket 200, in an embodiment, the socket 200 is adapted to extend into the accommodating groove 111 of the charging plug and be plugged with the plug inner core 120 of the charging plug. Thus, each charging terminal on the plug inner core 120 is plugged with the corresponding charging plug of the socket 200, and the outer peripheral wall of the socket 200 is plugged with the groove side wall of the accommodating groove 111. The plugging at the two places makes the friction between the charging plug 100 and the socket 200 larger, so that the connection between the two is more stable.

[0151] In addition, in an embodiment, the connector assembly further includes a first matching structure and a second matching structure, a third matching structure and a fourth matching structure, the first matching structure is arranged on the radial outer side of the socket 200, the second matching structure is arranged on the shell peripheral wall of the plug shell 110, and the first matching structure and the second matching structure are separably matched; the third matching structure is arranged at the plugging groove 210 of the socket 200, the fourth matching structure is arranged at the accommodating groove 111 of the plug shell 110, and the third matching structure and the fourth matching structure are separably matched.

[0152] Specifically, in the embodiment, on the basis of the friction force matching connection, the charging plug 100 and the socket 200 further realize further locking through the first matching structure and the second matching structure outside the two, and further locking through the third matching structure and the fourth matching structure inside the accommodating groove 111. It is not difficult to see that the first matching structure, the second matching structure, and the third matching structure, the fourth matching structure respectively lock from the inside and outside of the charging plug 100, so as to more firmly fix the charging plug on the socket 200, and reduce the risk of accidental falling of the charging plug 100 after being inserted into the socket 200. In this way, even if the friction force matching fails, the first matching structure, the second matching structure, and the third matching structure, the fourth matching structure can avoid the charging plug from falling off to cause liquid leakage or charging failure.

[0153] It can be understood that the first matching structure and the second matching structure can be buckle, lock pin and the like. For example, in an embodiment, referring to Figure 12 The first matching structure is configured as a buckling hook 310 fixedly arranged on the outer peripheral wall of the socket 200; the second matching structure is configured as a buckling piece 320 rotatably connected to the shell peripheral wall, and the buckling piece 320 is adapted to be hooked on the buckling hook 310.

[0154] Please refer to Figure 12In particular, the side wall of the plug shell 110 can be protruded to form a ramp, and the ramp is pivotally connected with a buckling member 320. The buckling member 320 can be configured as a hook, a ring-shaped member or the like. Correspondingly, the outer peripheral wall of the socket 200, or the socket 200 is fixedly installed on the body of the eVTOL, is provided with a buckling hook 310. After the plug inner core 120 is inserted into the socket 200, the buckling member 320 can be rotated until it is hooked on the buckling hook 310. Of course, before the charging plug is separated from the socket 200, the buckling member 320 needs to be detached from the buckling hook 310.

[0155] The third and fourth cooperation structures can also be configured as a lock pin, a buckle or the like. Alternatively, in an embodiment, the fourth cooperation structure is configured as a lock hole 330 which is opened on the outer peripheral wall of the plug shell 110 and which is in communication with the accommodating groove 111; and the third cooperation structure includes a lock tongue 343 and a position switching assembly. The lock tongue 343 is arranged in the insertion groove 210 and is configured to be movable between an extended position and an avoiding position. In the extended position, the lock tongue 343 is adapted to extend into the lock hole 330, and in the avoiding position, the lock tongue 343 avoids the plug shell 110. The position switching assembly is arranged in the insertion groove 210 and is adapted to drive the lock tongue 343 to move from the avoiding position to the extended position when the plug inner core 120 is completely inserted into the insertion groove 210.

[0156] Please refer to Figure 12 to Figure 15 In particular, at least one lock hole 330 is opened on the outer peripheral wall of the shell, and the lock hole 330 extends along the radial direction of the plug shell 110 to be in communication with the accommodating groove 111.

[0157] Since the socket 200 is adapted to extend into the accommodating groove 111, the outer peripheral wall of the socket 200 is provided with a lock tongue mounting hole which extends along the radial direction of the socket 200 to be in communication with the insertion groove 210. Part of the lock tongue 343 is sleeved in the lock tongue mounting hole, and the inner end of the lock tongue 343 extends into the insertion groove 210. The lock tongue 343 can be telescoped along the radial direction of the plug shell 110 in the lock tongue mounting hole. When the charging plug is completely inserted into the socket 200, the lock hole 330 and the lock tongue mounting hole correspondingly and continuously face each other, and when the lock tongue 343 extends 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 shell 110. When the lock tongue 343 is retracted to the avoiding position, the lock tongue 343 can be completely retracted into the lock tongue mounting hole, or it can also partially protrude from the outer peripheral 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 shell 110 and can slide relative to the outer peripheral wall of the socket 200.

[0158] The specific position of the locking tongue 343 is controlled by a position switching assembly. It can be understood that the position switching assembly can be configured as an electromagnet that drives the locking tongue 343 to extend and retract. Alternatively, the position switching assembly can also be configured as an electric control structure composed of a PLC (Programmable Logic Controller) and an electric control switch. However, the above structure is relatively complex and cannot achieve the automatic extension of the locking tongue 343 to the extended position when the charging plug 100 is plugged into the socket 200, and an additional instruction is required for control.

[0159] Therefore, in an embodiment, referring to Figure 15 , the locking tongue 343 comprises a first fitting hole 3432 and a second fitting hole 3431 which are sequentially arranged and communicate with each other in the direction from the radially inner side to the radially outer side of the plugging groove 210, and the size of the first fitting hole 3432 is smaller than the size of the second fitting hole 3431 in the width direction of the locking tongue 343; referring to Figure 14 , the position switching assembly comprises a seat body 341, a limiting rod 342, a second elastic member 345, and a third elastic member 344. The seat body 341 is arranged in the plugging groove 210, and the seat body 341 is provided with a rod moving hole in the side wall of the side facing the opening of the plugging groove 210 (referring to the lower side in Figure 14 ), and the seat body 341 is also provided with a locking tongue moving hole, which is opposite to the locking hole 330 when the plug inner core 120 is plugged into the plugging groove 210, and the seat body 341 further defines an assembly accommodating cavity 3411 which communicates with the rod moving hole and the locking tongue moving hole; wherein the locking tongue 343 is slidably arranged in the locking tongue moving hole; the limiting rod 342 is movably arranged in the rod moving hole along the depth direction of the plugging groove 210, and one end of the limiting rod 342 extends out of the rod moving hole to protrude from the side wall of the side of the seat body 341 facing the opening of the plugging groove 210 (for example, protrude from the lower side in Figure 14 ), and the limiting rod 342 comprises a small-diameter portion 3421 and a large-diameter portion 3422 which are sequentially arranged in the insertion direction of the plugging groove 210, the outer diameter of the large-diameter portion 3422 is larger than the outer diameter of the small-diameter portion 3421, the limiting rod 342 has a limiting position and a triggering position, at the limiting position, the large-diameter portion 3422 is matched with the second fitting hole 3431, and at the triggering position, the small-diameter portion 3421 is matched with the first fitting hole 3432; the second elastic member 345 is arranged in the assembly accommodating cavity 3411, two ends of the second elastic member 345 are connected with the seat body 341 and the locking tongue 343 respectively, and the second elastic member 345 always drives the locking tongue 343 to move towards the extended position; the third elastic member 344 is arranged in the assembly accommodating cavity 3411, and the third elastic member 344 always drives the limiting rod 342 to move towards the triggering position.

[0160] Specifically, please refer to Figure 14 and Figure 15, the seat body 341 can be configured as a U-shaped plate member. After the seat body 341 is installed in the insertion slot 210, its opening faces the slot side wall of the insertion slot 210 and is directly opposite and connected to the lock tongue mounting hole. At this time, the top plate of the U-shaped plate member faces the opening direction of the insertion slot 210 and is provided with a rod moving hole. It can be understood that the top and bottom of the U-shaped plate member are relative to the bottom wall of the insertion slot 210; for example, the bottom wall of the insertion slot 210 and the bottom plate of the U-shaped plate member are on the upper side in Figure 14 the upper side, and the top plate of the U-shaped plate member is on the lower side in Figure 14 . The bottom plate of the U-shaped plate member can be fixed in the insertion slot 210 by means of glue bonding, screw fastening or welding. The intermediate plate of the U-shaped plate member extends along the depth direction of the insertion slot 210 (the axial direction of the insertion housing), and it is spaced apart from the slot side wall of the insertion slot 210 to define a component accommodation cavity 3411.

[0161] The inner end of the lock tongue 343 extends from the lock tongue mounting hole into the component accommodation cavity 3411 and is connected to the second elastic member 345. The second elastic member 345 can be configured as a leaf spring, a compression spring or a disc spring, etc. It is arranged between the inner end of the lock tongue 343 and the intermediate plate of the U-shaped plate member and always drives the lock tongue 343 to extend outwards to the extended position. It is worth mentioning that in the direction from the radial inner side to the radial outer side of the insertion slot 210, the lock tongue 343 includes a first mating hole 3432 and a second mating 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 mating hole 3432 is smaller than the size of the second mating hole 3431. For example, in an example, the first mating hole 3432 and the second mating hole 3431 together form a hole in the shape of a "convex" character, where the protruding part in the "convex" character-shaped hole is the first mating hole 3432, and the rest of the "convex" character is the second mating hole 3431. Obviously, in the width direction of the lock tongue 343, the size of the first mating hole 3432 is smaller than the size of the second mating hole 3431. Of course, in other examples, the first mating hole 3432 and the second mating hole 3431 can also be configured as hole structures in the shape of an "L", etc., and this embodiment does not limit this.

[0162] A limiting rod 342 is also installed in the component accommodation cavity 3411. The limiting rod 342 can move along the depth direction of the insertion slot 210 (the same as the axial direction of the insertion housing) in the rod moving hole, and one end of the limiting rod 342 protrudes from the rod moving hole to protrude from the top plate of the U-shaped plate member, and the other end of the limiting rod 342 is connected to the third elastic member 344. The third elastic member 344 can be configured as a leaf spring, a compression spring or a disc spring, etc. 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 always drives the limiting rod 342 to move outwards towards the outside of the insertion slot 210 to the limiting position.

[0163] In the insertion direction of the insertion slot 210, the limiting rod 342 is a variable diameter structure, specifically including a small diameter part 3421 and a large diameter part 3422 arranged in sequence, and the outer diameter size of the large diameter part 3422 is greater than the outer diameter size of the small diameter part 3421. It is worth mentioning that the outer diameter size of the large diameter part 3422 is greater than the width size of the first matching hole 3432, so that the large diameter part 3422 cannot extend into the first matching hole 3432. The outer diameter size of the small diameter part 3421 is less than or equal to the width size of the first matching hole 3432, so that it can extend into the first matching hole 3432.

[0164] Therefore, in the process of matching the plug inner core 120 and the insertion slot 210, the plug inner core 120 and the insertion slot 210 are close to each other, and at this time the limiting rod 342 is in the limiting position, that is, the large diameter part 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 travel in the accommodating groove 111. At the same time, the plug inner core 120 pushes the limiting rod 342 in the opposite direction to overcome the elastic potential energy of the third elastic member 344 to move to the triggering position, until the large diameter part 3422 of the limiting rod 342 is separated from the second matching hole 3431 in the insertion direction of the insertion slot, and the small diameter part 3421 enters the second matching hole 3431. Under the action of the second elastic member 345, the locking tongue 343 extends to the extended position, and the small diameter part 3421 is clamped into the first matching hole 3432.

[0165] It is not difficult to see that in the embodiment, the control of the locking tongue 343 can be realized by the mechanical structure of 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 extension of the locking tongue 343 can be naturally completed when the charging plug 100 and the socket 200 are inserted and matched, without the need for additional operation by the staff, and the reliability is high.

[0166] It is worth mentioning that the large diameter part 3422 and the small diameter part 3421 can be connected by a tapered surface, or a step can be formed at the junction of the two. Among them, the step formed at the junction of the two is beneficial to the rapid separation of the large diameter part 3422 from the second matching hole 3431 and the rapid entry of the small diameter part 3421 into the first matching hole 3432, thereby improving the position switching rate of the locking tongue 343.

[0167] Of course, it can be understood that when the charging plug and the socket 200 are separated, the locking tongue 343 can be pushed back to the avoiding position by using a tool such as a push piece.

[0168] In addition, in order to avoid that the limiting rod 342 is completely retracted into the rod moving hole, the other end of the limiting rod 342 forms a cap part, and the outer diameter of the cap part is greater than the hole diameter of the rod moving hole.

[0169] It should be noted that the third matching structure can also be arranged on the plug shell 110, and the corresponding fourth matching structure is arranged in the plug-in slot 210.

[0170] 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 Figure 10 In an embodiment, the end surface of the plug inner core 120 away from the slot bottom wall of the accommodating slot 111 is protrusively provided with a boss 128. Wherein, the limiting rod 342 is adapted to abut against the boss 128 when the plug inner core 120 is plugged with the plug-in slot 210.

[0171] The boss 128 can be integrally formed with the plug inner core 120, and a corresponding cavity can also be defined therein, thereby expanding the volume of the fluid flowing through the cavity. Alternatively, the boss 128 can be a U-shaped piece fixedly connected to the upper end surface of the plug inner core 120, which is bonded to the upper end surface of the plug inner core 120.

[0172] Please refer to Figure 13 and Figure 16 In order to enable the socket 200 of the present embodiment to be independently matched with a standard charging gun, in an embodiment, a standard DC charging interface 220 is arranged in the plug-in slot 210, and the fourth matching structure is arranged on the outside of the standard DC charging interface 220 and spaced apart from each other.

[0173] Specifically, the plug-in slot 210 of the socket 200 has a standard DC charging interface 220 at the geometric center of the slot bottom wall, and the left and right sides of the standard DC charging interface 220 are respectively a first expansion matching area 240a and a second expansion matching area 240b. The first expansion matching area 240a matches with the first expansion area 125a of the charging plug, and the second expansion matching area 240b matches with the second expansion area 125b. At this time, the aforementioned fourth matching structure is arranged in the first expansion area 125a or the second expansion area 125b, and is spaced apart from the standard DC charging interface 220.

[0174] In order to improve the reliability of fastening, in an embodiment, the third matching structure and the fourth matching structure are each provided with a plurality of.

[0175] Specifically, the connector assembly can include at least two fourth matching structures, for example, the fourth matching structure can be provided with 4, and the 4 are uniformly spaced along the circumferential direction of the standard DC charging interface 220. Correspondingly, the third matching structure and the boss 128 on the plug shell 110 are also provided with 4. Of course, the fourth matching structure can also be 2 or 3 or more, and the present embodiment does not limit this.

[0176] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, which is made under the technical concept of the present application, and based on the content of the present application and the drawings, is included in the patent protection scope of the present application.

Claims

1. A charging plug, characterized in that, The charging plug comprises a plug body, an end surface 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 for connecting a cooling source; a fluid flow-through cavity respectively communicating with the fluid channel and the fluid interface, the fluid flow-through cavity is used for flowing through heat exchange fluid from the cooling source, and the fluid interface is used for connecting a cooling circuit of an external device; all of the charging terminals at least include a plurality of charging terminals to be cooled, and the charging plug further comprises a plurality of charging harnesses; at least one of a part of the charging terminals to be cooled and a part of the charging harnesses is arranged in the fluid flow-through cavity; the fluid flow-through cavity is divided into a first fluid flow-through cavity and a second fluid flow-through cavity by a partition, and the flow directions of the heat exchange fluid in the first fluid flow-through cavity and the second fluid flow-through cavity are opposite; the first fluid flow-through cavity is arranged as one of an inlet channel and an outlet channel, and the second fluid flow-through cavity is arranged as the other one of the inlet channel and the outlet channel; or, the fluid flow-through cavity is divided into a separate circuit connection cavity and a charging cooling cavity, and the circuit connection cavity respectively communicates with the fluid channel and the fluid interface; at least one of a part of the charging terminals to be cooled and a part of the charging harnesses is arranged in the charging cooling cavity, and the charging cooling cavity communicates with the fluid channel; the plug body comprises a plug shell and a plug inner core, an end surface of a first shell end in an axial direction of the plug shell is provided with a receiving groove extending along the axial direction of the plug shell to a second shell end in the axial direction of the plug shell; the plug inner core is arranged in the receiving groove, an end surface of one end of the plug inner core away from a groove bottom wall of the receiving groove is provided with a plurality of the charging terminals, and the plug inner core and the plug shell jointly define the fluid flow-through cavity.

2. The charging plug of claim 1, wherein, all of the fluid interfaces communicating with the first fluid flow-through cavity are used for connecting an inlet end of a cooling circuit of an external device, and all of the fluid interfaces communicating with the second fluid flow-through cavity are used for connecting an outlet end of the cooling circuit of the external device.

3. The charging plug of claim 1 or 2, wherein, the charging plug further comprises a plurality of low-voltage emergency power supply terminals, and the low-voltage emergency power supply terminals extend into the fluid flow-through cavity.

4. The charging plug of claim 3, wherein, the first fluid flow-through cavity defines a first sub-cavity and a second sub-cavity, and the second fluid flow-through cavity defines a third sub-cavity and a fourth sub-cavity; wherein a part of all of the low-voltage emergency power supply terminals extends into the first sub-cavity, a part of all of the fluid interfaces communicates with the second sub-cavity, another part of all of the low-voltage emergency power supply terminals extends into the third sub-cavity, and another part of all of the fluid interfaces communicates with the fourth sub-cavity.

5. The charging plug of claim 1 or 2, wherein, all of the charging terminals to be cooled include a plurality of standard charging terminals, a high-voltage direct-current positive terminal of a plurality of the standard charging terminals is in the first fluid flow-through cavity and connected with a corresponding charging harness, and a high-voltage direct-current negative terminal of the plurality of the standard charging terminals is in the second fluid flow-through cavity and connected with a corresponding charging harness.

6. The charging plug of claim 1 or 2, wherein, All of the to-be-cooled charging terminals include a plurality of standard charging terminals, a low-voltage auxiliary power positive terminal of the plurality of standard charging terminals is in the first fluid flow channel and connected with a corresponding charging harness, and a low-voltage auxiliary power negative terminal of the plurality of standard charging terminals is in the second fluid flow channel and connected with the corresponding charging harness.

7. The charging plug of claim 3, wherein, Another part of the to-be-cooled charging terminals penetrates through an end face of the plug inner core away from the groove bottom wall to be exposed from the plug inner core, and another part of the charging harness penetrates through an end face of the plug inner core toward the groove bottom wall of the accommodating groove to extend into the plug shell.

8. The charging plug of claim 3, wherein, The end face of the plug inner core away from the groove bottom wall of the accommodating groove includes a standard charging interface part and an extension area, the extension area is provided with a plurality of fluid interfaces in communication with the fluid flow channel, and all or part of the low-voltage emergency power terminals are arranged in the extension area.

9. The charging plug of claim 3, wherein, The low-voltage emergency power terminals extend to a part of the plug inner core which is not provided with the fluid flow channel.

10. The charging plug of claim 3, wherein, The end face of the plug inner core away from the groove bottom wall of the accommodating groove includes a standard charging interface part and an extension area, the extension area is provided with a plurality of fluid interfaces in communication with the fluid flow channel; The plug inner core and the plug 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 flow channel, the second standard cavity and the first fluid flow channel are sequentially distributed along the circumference of the plug inner core. The charging plug further includes a first communication terminal, a second communication terminal, a first charging connection terminal, a second charging connection terminal and a grounding terminal, the first communication terminal, the second communication terminal, the first charging connection terminal and the second charging connection terminal are arranged at positions of the standard charging interface part opposite to the first standard cavity, and the grounding terminal is arranged at a position of the standard charging interface part opposite to the second standard cavity.

11. The charging plug of claim 10, wherein, At least part of the standard charging terminals are arranged in the standard charging interface part.

12. A charging gun, characterized in that The charging plug includes: The charging plug according to any one of claims 1 to 11; A charging cable, wires in the charging cable are electrically connected with the charging terminals of the charging plug.

13. A joint assembly characterized by The charging plug includes: The charging plug according to any one of claims 1 to 11; And A socket adapted to be plugged with the charging terminals of the charging plug.

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