CN118849826A

CN118849826A - Charging plug, charging gun and joint assembly

Info

Publication number: CN118849826A
Application number: CN202411338528.XA
Authority: CN
Inventors: 薛松柏; 李清; 孙滋夏; 王珂; 李�杰; 廖志乔
Original assignee: Sichuan Wofei Changkong Technology Development Co ltd; Zhejiang Geely Holding Group Co Ltd
Current assignee: Sichuan Wofei Changkong Technology Development Co ltd; Zhejiang Geely Holding Group Co Ltd
Priority date: 2024-09-25
Filing date: 2024-09-25
Publication date: 2024-10-29

Abstract

The invention discloses a charging plug, a charging gun and a joint assembly, and relates to the technical field of ground maintenance. The fluid channel, the fluid flow cavity and the fluid interface defined by the charging plug are beneficial to conveniently communicating with a cooling loop of external equipment for heat management; the charging wire harness is consistent in number with the charging terminals to be cooled and is correspondingly connected, at least one of a part of the charging terminals to be cooled and a part of the charging wire harness is arranged in the fluid flow cavity, so that the temperature of the charging terminals to be cooled or the charging wire harness near the plugging position can be reduced through the fluid flow cavity, and the integral charging current or the charging power can be improved. The body pressure relief channel on the plug body is communicated with the fluid flow cavity, and the body pressure relief channel is configured to be opened and closed, so that pressure relief can be realized through opening the body pressure relief channel when a liquid path is blocked or instantaneous high pressure is formed, and the risk of damage to the cooling loop of the charging plug and external equipment is reduced.

Description

Charging plug, charging gun and joint assembly

Technical Field

The invention relates to the technical field of ground maintenance, in particular to a charging plug, a charging gun and a joint assembly.

Background

Electric vehicles such as new energy automobiles, eVTOL (ELECTRIC VERTICAL Takeoff AND LANDING, electric vertical take-off and landing aircrafts), new energy ships and the like which take electric energy as main power comprise power battery packs, and when the electric vehicles are maintained on the ground, the power battery packs are required to be restored to specified electric quantity, and the electric core temperature of the power battery packs is required to be adjusted to the specified temperature.

In the related art, during maintenance, after the ground thermal management system is connected with the electric vehicle through the thermal management interface assembly, heat exchange fluid such as cooling liquid is conveyed into a cooling loop corresponding to a power battery pack of the electric vehicle, so that active thermal management is performed.

However, in the related art, when the cooling circuit of the power battery pack is actively thermally managed, the cooling circuit may be damaged.

Disclosure of Invention

The main purpose of the invention is to propose a charging plug, a charging gun and a joint assembly, aiming at reducing the risk of damage to the cooling circuit.

In order to achieve the above object, the present invention provides a charging plug, which includes a plug body, wherein 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, a fluid flow cavity and a body pressure release channel, and the fluid channel is used for connecting a cooling source; the fluid flow cavity is respectively communicated with the fluid channel and the fluid interface, the fluid flow cavity is used for flowing heat exchange fluid from a cooling source, and the fluid interface is used for connecting a cooling circuit of external equipment; the charging plug comprises a plurality of charging terminals to be cooled, and a plurality of charging wire bundles, wherein the number of the charging wire bundles is consistent with that of the charging terminals to be cooled and the charging wire bundles are connected in a one-to-one correspondence manner; at least one of a portion of the charging terminal to be cooled and a portion of the charging harness is provided in the fluid flow-through cavity, and the other portion of the charging terminal to be cooled penetrates an end face of the plug body to be exposed from the plug body; the body pressure relief channel is in communication with the fluid flow-through cavity, and the body pressure relief channel is configured to be openable and closable.

In an implementation, the plug body comprises a plug shell and a plug inner core, an accommodating groove is formed in the end face of a first shell end in the axial direction of the plug shell, at least one shell pressure relief opening is formed in the groove wall of the accommodating groove, the plug shell is internally provided with a fluid channel communicated with the accommodating groove and a shell pressure relief channel communicated with the shell pressure relief opening, and the body pressure relief channel comprises the shell pressure relief channel; the plug inner core is arranged in the accommodating groove in a movable mode along the axial direction of the plug outer shell, a plurality of charging terminals are arranged on one end face of the bottom wall of the accommodating groove, at least one inner core pressure relief opening is formed in the side wall, opposite to the outer shell pressure relief opening, of the plug inner core, the inner core pressure relief openings are consistent in number and correspond to the outer shell pressure relief openings one by one, a fluid flow cavity communicated with the inner core pressure relief openings is defined in the plug inner core, the fluid flow cavity is in sealing movable connection with the fluid channel, and the plug inner core is provided with communication positions enabling the inner core pressure relief openings to correspond to the outer shell pressure relief openings and to be opposite to each other.

In one implementation, the plug body further includes a first elastic member disposed in the accommodating groove; the two ends of the first elastic piece are respectively connected with the plug inner core and the plug outer shell, and the first elastic piece is used for always driving the plug inner core to be far away from the communication position.

In an implementation, the communication position is a travel end position of the plug inner core in the accommodating groove, wherein the travel end position moves towards the groove bottom wall direction of the accommodating groove, and the first elastic piece normally drives the plug inner core to be far away from the communication position along the direction far away from the groove bottom wall of the accommodating groove.

In an implementation, the housing pressure relief opening is formed in the groove side wall of the accommodating groove, and at least one inner core pressure relief opening is formed in the position, matched with the groove side wall of the accommodating groove, of the outer core peripheral wall of the inner core of the plug.

In an implementation, the charging plug further comprises a holding piece, the holding piece is fixedly arranged on the outer peripheral wall of the plug shell, the holding piece is provided with a handle pressure relief opening, a part of the holding piece, which is close to the first shell end, extends into the accommodating groove and is provided with the shell pressure relief opening, an intermediate pressure relief channel is defined in the holding piece, and the intermediate pressure relief channel is communicated with the shell pressure relief opening and the handle pressure relief opening; the handle pressure relief opening is communicated with the shell pressure relief channel.

In one implementation, part of the surface of the outer peripheral wall of the inner core is recessed to form a handle sliding groove, the handle sliding groove extends to two axial ends of the inner core of the plug along the axial direction of the plug shell, and the groove wall of the handle sliding groove is provided with the inner core pressure relief opening; the portion of the grip member adjacent the first housing end extends into the receiving slot and forms a sliding portion that slidably fits within the handle chute.

In one embodiment, the sliding part extends towards the bottom wall of the accommodating groove in a bending way and/or the side wall of the accommodating groove is provided with a matching area matched with the sliding part; the sliding part deviates from the side wall of one side of the matching area and is provided with the shell pressure relief opening, and the handle sliding chute is opposite to the side wall of one side of the matching area and is provided with the inner core pressure relief opening.

In one implementation, another portion of the charging terminal to be cooled extends through an end face of the plug core facing away from the bottom wall of the tank to be exposed from the plug core; another portion of the charging harness penetrates through an end face of the plug inner core toward a groove bottom wall of the accommodating groove to extend into the plug housing.

In one implementation, an end face of the plug inner core, which is away from the bottom wall of the accommodating groove, comprises a standard charging interface part and an expansion area, and the expansion area is provided with a plurality of fluid interfaces communicated with the fluid flow cavity; all the charging terminals to be cooled comprise a plurality of standard charging terminals, and at least part of the standard charging terminals are arranged at the standard charging interface part.

In one implementation, the charging plug further includes a plurality of low voltage emergency power terminals, at least a portion of the low voltage emergency power terminals being disposed in the expansion zone.

In one implementation, the fluid flow-through chamber is separated into a first fluid flow-through chamber and a second fluid flow-through chamber by a partition; the plug body is internally provided with a pressure relief three-way channel, and the pressure relief channel of the plug body comprises the pressure relief three-way channel; the first end of the pressure relief three-way channel is communicated with the first fluid flow cavity, and the second end of the pressure relief three-way channel is communicated with the second fluid flow cavity; the charging plug further comprises two pressure relief valves, one pressure relief valve is arranged at the first end, and the other pressure relief valve is arranged at the second end.

In one implementation, the fluid flow-through cavity is divided into a circuit connecting cavity and a charging cooling cavity which are independent, the circuit connecting cavity is communicated with the fluid channel and the fluid interface respectively, and the shell pressure relief channel is communicated with the circuit connecting cavity; at least one of a part of the charging terminal to be cooled and a part of the charging harness is arranged in the charging cooling cavity, and the charging cooling cavity is communicated with the fluid channel; and/or a pressure relief valve assembly is arranged on the pressure relief channel of the body and is used for enabling the pressure relief channel of the body to be opened and closed.

In one implementation, a device cavity is further defined in the plug housing of the plug body, the device cavity being disposed between the receiving slot of the plug body and the second housing end of the plug housing in the axial direction; the charging plug further comprises a control module, an operating piece and a plurality of detection elements, wherein the detection elements are arranged in a plug inner core of the plug body or in the plug shell; the control module is arranged in the device cavity, is respectively in communication connection with each detection element, and is provided with a plurality of status indicator lamps; the operating piece is arranged on the peripheral wall of the plug shell, and part of the operating piece penetrates through the side wall of the plug shell and extends into the device cavity to be connected with the control module; the operation piece comprises a touch screen and/or a control button; the plug comprises a plug shell, a device cavity, a plurality of through holes, a plurality of status indicator lamps, a plurality of display devices and a plurality of display devices, wherein the plurality of through holes are formed in the peripheral wall of the plug shell and are communicated with the device cavity, the number of the plurality of through holes is consistent with that of the plurality of status indicator lamps and corresponds to that of the status indicator lamps one by one, so that the status indicator lamps extend into the corresponding through holes and are exposed from the corresponding through holes.

In one implementation, one end of the body pressure relief channel extends to communicate with an end face of the second housing end, and the other end of the body pressure relief channel communicates with the device cavity; the part of the holding piece close to the second shell end penetrates through the peripheral wall of the plug shell to extend into the device cavity, and a handle pressure relief opening is formed in the end face of the part of the holding piece close to the second shell end; the charging plug further comprises a connecting pipe, the connecting pipe is arranged in the device cavity, and the handle pressure relief opening is communicated with the body pressure relief channel through the connecting pipe.

In one implementation, the bottom wall of the accommodating groove is provided with a channel port communicated with the fluid channel; the charging plug further comprises a pipe joint, the pipe joint is convexly arranged on the end face of one end of the plug inner core, which faces the bottom wall of the tank, the pipe joint is communicated with the fluid flow cavity, the pipe joint comprises a plurality of conical parts which are sequentially connected along the protruding direction of the pipe joint, and the outer diameter of each conical part is gradually reduced in the protruding direction; wherein the tube fitting is adapted to be inserted into the fluid passage from the passage opening and the tapered portion is in interference fit with the fluid passage and is relatively movable to allow the fluid flow through chamber to be in sealing movable communication with the fluid passage.

In one implementation, the first elastic piece comprises a compression spring, and the compression spring is arranged between an end face of the plug inner core, which faces the groove bottom wall, and the groove bottom wall of the accommodating groove; and/or, the first elastic member is provided with a plurality of.

In addition, the invention also provides a charging gun which comprises a charging cable and the charging plug; and the lead in the charging cable is electrically connected with the charging terminal of the charging plug.

In an embodiment, a pressure relief backflow channel extending along the wiring direction of the charging cable is defined in the charging cable, and a housing pressure relief channel of the charging plug is communicated with the pressure relief backflow channel.

In addition, the invention also provides a connector assembly, which comprises a socket and the charging plug, wherein the socket is suitable for being in plug-in fit with a charging terminal of the charging plug.

In one embodiment, the socket is adapted to extend into the receiving groove of the charging plug and to be in plug-in engagement with the charging terminal.

In one embodiment, the joint assembly further comprises: the first matching structure is arranged on the radial outer side of the socket, the second matching structure is arranged on the outer peripheral wall of the plug outer shell of the plug body, and the first matching structure and the second matching structure are detachably matched; the third matching structure is arranged at the inserting groove of the socket, the fourth matching structure is arranged at the accommodating groove of the plug shell of the plug body, and the third matching structure and the fourth matching structure are detachably matched.

In an embodiment, the first mating structure is configured as a snap-fit hook, and the snap-fit hook is fixedly arranged on the peripheral wall of the socket; the second mating structure is configured as a clasp rotatably coupled to the peripheral wall of the plug housing, the clasp adapted to be hooked to the clasp.

In an embodiment, the fourth mating structure is configured as a lock hole formed in the outer peripheral wall of the plug housing, and the lock hole is in communication with the receiving groove; the third matching structure comprises a lock tongue and a position switching assembly, the lock tongue is arranged in a plugging groove of the socket and is configured to be movable between an extending position and a avoiding position, the lock tongue is suitable for extending into the lock hole in the extending position, and the lock tongue is avoided from the plug shell in the avoiding position; the position switching assembly is arranged in the inserting groove, and is suitable for driving the lock tongue to move from the avoiding position to the extending position when the plug inner core is inserted into the inserting groove.

In an embodiment, the lock tongue comprises a first matching hole and a second matching hole which are sequentially formed and communicated with each other in the direction from the radial inner side to the radial outer side of the insertion groove, and the size of the first matching hole is smaller than that of the second matching hole in the width direction of the lock tongue; the position switching assembly comprises a base body, a limiting rod, a second elastic piece and a third elastic piece, wherein the base body is arranged in the inserting groove, a rod moving hole is formed in the side wall of one side of the base body, which faces to the opening of the inserting groove, a lock tongue moving hole is further formed in the base body, when the plug inner core is in inserting fit with the inserting groove, the lock tongue moving hole and the lock hole are opposite to each other, and an assembly accommodating cavity which is respectively communicated with the rod moving hole and the lock tongue moving hole is further defined in the base body; wherein, the lock tongue is slidably assembled in the lock tongue moving hole; the limiting rod is movably arranged in the rod movable hole along the depth direction of the inserting groove, one end of the limiting rod extends out of the rod movable hole to protrude out of one side wall of the seat body, which faces the opening of the inserting groove, the limiting rod comprises a small diameter part and a large diameter part which are sequentially arranged in the inserting direction of the inserting groove, the outer diameter size of the large diameter part is larger than that of the small diameter part, the limiting rod is provided with a limiting position and a triggering position, the large diameter part is matched with the second matching hole in the limiting position, and the small diameter part is matched with the first matching hole in the triggering position; the second elastic piece is arranged in the assembly accommodating cavity, two ends of the second elastic piece are respectively connected with the seat body and the lock tongue, and the second elastic piece normally drives the lock tongue to move towards the extending position; the third elastic piece is arranged in the component accommodating cavity, two ends of the third elastic piece are respectively connected with the seat body and the limiting rod, and the third elastic piece normally drives the limiting rod to move towards the triggering position.

In an embodiment, a standard dc charging interface is disposed in the socket slot of the socket, and the connector assembly includes at least two fourth mating structures, where the fourth mating structures are disposed outside the standard dc charging interface and are spaced apart from each other.

The fluid channel defined by the charging plug is used for connecting a cooling source, and the fluid flow cavity is respectively communicated with the fluid channel and the fluid interface, so that the fluid flow channel can be conveniently and rapidly communicated with a cooling loop of external equipment such as an electric vehicle and the like through the fluid interface on the charging plug, and the cooling part waiting for the power battery pack of the external equipment can be efficiently and thermally managed; on the other hand, the quantity of the charging wire harnesses is consistent with the quantity of the charging terminals to be cooled in the charging terminals and is connected in a one-to-one correspondence manner, at least one of a part of the charging terminals to be cooled and a part of the charging wire harnesses is arranged in the fluid flow cavity, and the other part of the charging terminals to be cooled penetrates through the end face of the plug body to be exposed out of the plug body, so that the charging plug can conveniently and rapidly charge external equipment such as an electric vehicle through the charging terminals, and the charging terminals to be cooled or the charging wire harnesses near the plugging position can be cooled through the fluid flow cavity, thereby being beneficial to improving the overall charging current or charging power and reducing the charging time. On the other hand, the body pressure relief channel on the plug body is communicated with the fluid flow cavity, and the body pressure relief channel is configured to be opened and closed, so that when the liquid path of the cooling circuit comprising the fluid channel, the fluid flow cavity, the fluid interface and the external equipment is blocked or forms instantaneous high pressure, the pressure can be relieved through opening the body pressure relief channel, and the risk of damage to the cooling circuit of the charging plug and the external equipment is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an embodiment of a charging plug according to the present invention;

FIG. 2 is a cross-sectional view of a plug core in a connected position in an embodiment of a charging plug provided by the present invention;

FIG. 3 is a schematic view of a handle of an embodiment of a charging plug according to the present invention;

FIG. 4 is a schematic view illustrating the cooperation of a handle and a handle chute according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating an internal space of a charging plug according to an embodiment of the present invention;

fig. 6 is a schematic view of an internal space of a charging plug according to another embodiment of the present invention;

FIG. 7 is a schematic view of a plug core according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of the B-B position of FIG. 7;

FIG. 9 is a cross-sectional view taken at the A-A position of FIG. 7;

fig. 10 is a schematic view of a partial structure of a charging plug in a top view according to an embodiment of the present invention;

FIG. 11 is a schematic diagram illustrating the functions and communication connection of a control module in an embodiment of a charging plug according to the present invention;

FIG. 12 is a schematic view of an embodiment of a joint assembly according to the present invention;

FIG. 13 is a schematic end view of a socket in an embodiment of a connector assembly according to the present invention;

FIG. 14 is a schematic view of a position switching assembly of a socket according to an embodiment of the present invention;

FIG. 15 is a schematic view of a latch of a position switch assembly according to an embodiment of the present invention;

fig. 16 is a schematic diagram illustrating the mating of a socket with a standard charging gun in an embodiment of a connector assembly according to the present invention.

Reference numerals illustrate:

100. A charging plug; 110. a plug housing; 111. a receiving groove; 112. a device cavity; 113. a cable integrated head; 114. a water flow pipe; 115. an operating member; 116. status indicator lights; 120. a plug inner core; 122. a fluid interface; 121. the fluid flows through the cavity; 121a, through which a first fluid flows; 121a1, a first subchamber; 121a2, a second subchamber; 121b, through which a second fluid flows; 121b1, a third subchamber; 121b2, fourth subchamber; 121c, a first standard cavity; 121d, a second standard cavity; 123. a handle chute; 124. a standard charging interface; 125a, a first extension region; 125b, a second extension region; 126. a pipe joint; 127. a Y-shaped tube; 128. a boss; 129. an inner core pressure relief port; 130. a first elastic member; 140. a handle; 141. a middle pressure relief channel; 142. a sliding part; 143. a handle pressure relief port; 144. a housing pressure relief vent; 145. a connecting pipe; 150. a low voltage emergency power supply terminal; 200. a socket; 210. a plug-in groove; 220. a standard dc charging interface; 230. a fluid slot; 240a, a first expansion mating zone; 240b, a second expansion mating zone; 310. a buckling hook; 320. a fastener; 330. a lock hole; 341. a base; 3411. a component mounting groove; 342. a limit rod; 3421. a small diameter portion; 3422. a large diameter portion; 343. a bolt; 3431. a second mating hole; 3432. a first mating hole; 344. a third elastic member; 345. and a second elastic member.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The vehicle body of the electric vehicle taking electric energy as main power, such as a new energy automobile, eVTOL (ELECTRIC VERTICAL Takeoff AND LANDING, an electric vertical take-off and landing aircraft), a new energy ship and the like, is provided with a charging socket which is matched with the charging plug in a plugging manner, and when the charging plug is matched with the charging socket, a plurality of charging terminals on the charging plug are respectively matched with corresponding plug sleeves on the charging socket.

Taking eVTOL as an example, the power cell needs to be restored to a specified amount of electricity and temperature before each flight. In order to make eVTOL lighter and improve the overall integration and performance of eVTOL, it is currently a feasible solution to understand eVTOL heat pipes as being coupled to an overhead passive thermal management system (temperature difference region created by means of heat capacity and ground temperature regulation) and to a ground active thermal management system. A thermal management interface is therefore required at eVTOL through which the surface active thermal management system communicates with eVTOL to establish a heat exchange fluid delivery path and provide a corresponding heat exchange fluid to eVTOL. In particular, the thermal management interface may be configured as a socket, while the ground-based active thermal management system has a corresponding charging plug structure. Of course, the charging plug structure needs to have a corresponding pressure relief design, so that after the ground active heat management system is communicated with eVTOL, the pressure of the heat exchange fluid conveying channel can be relieved when the pressure abnormality and the blockage occur, the cooling circuit of external equipment such as an electric vehicle and the like can be possibly damaged, and the corresponding power battery and even traffic equipment can be possibly endangered.

To this end, the application provides a solution to reduce the risk of damage to the cooling circuit.

The technical idea of the present invention will be further explained below in conjunction with some specific embodiments.

Referring to fig. 1 and 2, the charging plug 100 provided by the present invention includes a plug body, where the plug body may include a plug outer shell 110 and a plug inner core 120 that are separately disposed, and of course, the plug body may also be configured 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, the upper end face of the plug body in fig. 1 is provided with the charging terminals and the fluid interfaces 122. The plug body further defines a fluid passage for connecting a cooling source, which may be a storage device storing a cooling fluid such as an insulating cooling fluid, and a fluid flow through the cavity 121 and a body pressure relief passage, and which may be placed on the ground.

The fluid flow cavity 121 is respectively communicated with the fluid channel and the fluid interface 122, the fluid flow cavity 121 is used for flowing heat exchange fluid from a cooling source, the fluid interface 122 is used for connecting a cooling circuit of external equipment, for example, the fluid interface 122 can connect a cooling circuit for cooling a power battery of an electric vehicle such as eVTOL. All charging terminals comprise at least a plurality of charging terminals to be cooled, it being understood that at least part of the charging electrons are arranged as charging terminals to be cooled, so that cooling is achieved by the subsequent construction.

The charging plug 100 further includes a plurality of charging harnesses, the number of which is identical to the number of charging terminals to be cooled and which are connected in one-to-one correspondence with each other; at least one of a portion of the charging terminal to be cooled and a portion of the charging harness is disposed within the fluid flow-through cavity, for example, a portion of the charging terminal to be cooled is disposed within the fluid flow-through cavity, a portion of the charging harness is disposed within the fluid flow-through cavity, a portion of the charging terminal to be cooled and a portion of the charging harness are disposed within the fluid flow-through cavity, which is not limited in this embodiment. In addition, another portion of the charging terminal to be cooled penetrates through the end face of the plug body to be exposed from the plug body, for example, from the upper side in the drawing, thereby facilitating electrical connection for charging. In addition, the body pressure relief passage communicates with the fluid flow chamber, the body pressure relief passage being configured to be openable and closable. The pressure relief valve assembly is used for enabling the pressure relief channel of the body to be opened and closed through opening and closing conversion; of course, a movable baffle structure or the like may be disposed at the inlet and outlet positions of the body pressure relief channel, so that the opening and closing of the body pressure relief channel can be realized by the relative movement of the baffle structure, which is not limited in this embodiment.

It can be understood that when the cooling circuits of the electric vehicles such as the charging plugs 100 and eVTOL are connected, the risk of blocking the liquid path and generating the instantaneous high pressure is high when the cooling circuits are connected with the charging plug 100 due to the above-mentioned reasons of the longer overall length of the cooling circuits, the smaller pipe diameter relative to the overall length, the larger total amount of the overall cooling liquid flowing, and the larger pressure difference between the cooling source and the cooling circuits.

In the above embodiment, the fluid channel defined by the charging plug 100 is used for connecting a cooling source, and the fluid flow cavity is respectively communicated with the fluid channel and the fluid interface, so that the fluid flow cavity can be conveniently and quickly communicated with a cooling circuit of an external device such as an electric vehicle through the fluid interface 122 on the charging plug 100, and thus the cooling component is waited for to be efficiently and thermally managed for the power battery pack of the external device; on the other hand, the number of the charging wire harnesses is consistent with the number of the charging terminals to be cooled in the charging terminals and the charging terminals are connected in a one-to-one correspondence manner, at least one of a part of the charging terminals to be cooled and a part of the charging wire harnesses is arranged in the fluid flow cavity 121, and the other part of the charging terminals to be cooled penetrates through the end face of the plug body to be exposed out of the plug body, so that the charging plug 100 can charge external equipment such as an electric vehicle conveniently and rapidly through the charging terminals, and the charging terminals to be cooled or the charging wire harnesses near the plugging position can be cooled through the fluid flow cavity 121, which is beneficial to improving the overall charging current or charging power and reducing the charging time. On the other hand, the body pressure relief channel on the plug body is communicated with the fluid flow cavity, and the body pressure relief channel is configured to be opened and closed, so that when the liquid path of the cooling circuit comprising the fluid channel, the fluid flow cavity, the fluid interface and the external equipment is blocked or forms instantaneous high pressure, the pressure can be relieved through opening the body pressure relief channel, and the risk of damage to the cooling circuit of the charging plug 100 and the external equipment is reduced.

Referring to fig. 2 and 3, a plug body in some embodiments may be provided that includes a plug outer housing 110 and a plug inner core 120. The end face of the first shell end in the axial direction of the plug shell 110 is provided with a containing groove 111, the groove wall of the containing groove 111 is provided with at least one shell pressure relief opening 144, a fluid channel communicated with the containing groove 111 and a shell pressure relief channel communicated with the shell pressure relief opening 144 are defined in the plug shell 110, and at this time, the body pressure relief channel comprises the shell pressure relief channel; the plug inner core 120 is movably arranged in the accommodating groove 111 along the axial direction of the plug outer shell 110, and one end face of the plug inner core 120, which is away from the groove bottom wall of the accommodating groove 111, is provided with a plurality of charging terminals; referring to fig. 3 and 4, at least one inner core pressure relief port 129 is formed in a side wall of the plug inner core 120 opposite to the outer shell pressure relief port 144, and the inner core pressure relief ports 129 and the outer shell pressure relief ports 144 are consistent in number and correspond to each other one by one; referring to fig. 2, the plug core 120 defines a fluid flow chamber 121 in communication with the core pressure relief ports 129, the fluid flow chamber 121 is in sealing and movable connection with the fluid passage, and the plug core 120 has a communication position in which each core pressure relief port 129 is respectively opposite to and communicates with the corresponding housing pressure relief port 144; the plug body may include a first elastic member 130, where the first elastic member 130 is disposed in the accommodating groove 111, two ends of the first elastic member 130 are respectively connected to the plug inner core 120 and the plug outer shell 110, and the first elastic member 130 often drives the plug inner core 120 away from the communicating position. Wherein, the fluid flowing through the cavity 121 is movably connected with the fluid channel in a sealing manner, which can be understood as: the fluid flowing through the cavity 121 and the fluid passage can be kept sealed to prevent the heat exchange fluid from leaking, and the fluid flowing through the plug core 120 and the like structures where the cavity 121 is located and the plug housing 110 and the like structures where the fluid passage is located can be relatively moved, for example, relatively moved in the up-down direction in the figure.

Specifically, the plug housing 110 has a shaft-like structure, and the outer contour shape of the radial cross section thereof may be a polygon such as a circle, a triangle, or a rectangle. Rectangular is described below as an example. The housing groove 111 is formed in the first housing end in the axial direction of the plug housing 110, that is, the end surface of the end that mates with the receptacle 200 (see fig. 12). The receiving groove 111 extends in the axial direction of the plug housing 110 toward the second housing end in the axial direction of the plug housing 110. The second housing end of the plug housing 110 is connected to the tubing to receive a heat exchange fluid such as coolant delivered by the tubing. A fluid passage is defined within the plug housing 110 for the heat exchange fluid to continue to flow.

Referring to fig. 1, the plug core 120 is of a shaft-like structure, which is movably fitted in the receiving groove 111 in the axial direction of the plug housing 110. The plug core 120 is the portion that mates with the mating grooves 210 (see fig. 12 and 14) of the receptacle 200, i.e., the plug core 120 defines a fluid flow cavity 121 therein. The fluid flow through chamber 121 is in sealing movable connection with the fluid passage such that heat exchange fluid from within the fluid passage continues to the fluid flow through chamber 121. When the plug core 120 is plugged into the socket 200, the fluid interface of the upper end surface of the plug core 120 mates with the fluid slot 230 (see fig. 13) on the socket 200, thereby establishing a corresponding heat exchange fluid transfer channel. In addition, when the plug core 120 is plugged into the socket 200, various charging terminals are plugged into corresponding slots on the socket 200.

For ease of understanding, the description below will be directed upward with respect to the direction from the second housing end to the first housing end of the plug housing 110. At this time, the first housing end of the plug housing 110 is an upper end of the plug housing 110, and the second housing end of the plug housing 110 is a lower end of the plug housing 110. Similarly, the end of the plug core 120 facing the groove bottom wall of the accommodation groove 111 (the groove wall opposite to the opening of the accommodation groove 111) is the lower end of the plug core 120, and the end of the plug core 120 facing away from the groove bottom wall of the accommodation groove 111 is the upper end of the plug core 120.

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

(1) The plug housing 110 encloses the receptacle 200 through the receiving slot 111 when the plug core 120 is mated with the receptacle 200. I.e., the socket 200 is inserted into the receiving groove 111. It will be readily apparent that in this case, the fit between the charging plug and the socket 200 is tighter.

(2) When the plug core 120 is in plug-in engagement with the receptacle 200, the upper end surface of the plug core 120 protrudes from the opening of the accommodation groove 111 so as to protrude from the upper end surface of the plug housing 110. At this time, the socket 200 does not protrude into the receiving groove 111. It is easily seen that the size and volume of the charging plug are smaller than those of the 1 st case.

In addition, in order to reduce the size of the charging plug and avoid wasting the internal space of the charging plug 100, the shape of the inner profile of the receiving groove 111 is identical to the shape of the outer profile of the plug inner core 120 on the radial plane of the plug housing 110, and the size therebetween may be such that the clearance fit is satisfied, so that the plug inner core 120 can slide smoothly in the receiving groove 111.

The wall of the accommodating groove 111 is provided with at least one casing pressure relief opening 144. Accordingly, at least one core relief opening 129 is formed in a side wall of the plug core 120 opposite to the shell relief opening 144, and the core relief openings 129 and the shell relief openings 144 are consistent in number and correspond to each other one by one.

Alternatively, the shell pressure relief opening 144 is formed in the bottom wall of the accommodating groove 111, and the core pressure relief opening 129 is formed in the lower end surface of the plug core 120. Alternatively, the housing pressure relief vent 144 may be formed in the side wall of the receiving slot 111, and the core pressure relief vent 129 may be formed in the core peripheral wall of the plug core 120. Alternatively, a part of the plurality of shell pressure relief openings 144 is formed in the groove side wall of the accommodating groove 111, another part is formed in the groove bottom wall of the accommodating groove 111, and correspondingly, a part of the plurality of core pressure relief openings 129 is formed in the lower end surface of the plug core 120, and another part is formed in the core peripheral wall.

Referring to fig. 2, 3 and 4, the plug core 120 is designed with a communication position in the travel of the receiving groove 111. At this communication position, each inner core relief port 129 is opposite to and communicates with a corresponding outer shell relief port 144, respectively. It can be seen that each core relief vent 129 and corresponding shell relief vent 144 do not oppose and/or communicate with each other when the plug core 120 is in the non-communication position during axial movement of the plug core 120 within the receiving slot 111 along the plug shell 110. Obviously, when the inner core pressure relief opening 129 is communicated with the outer shell pressure relief opening 144, the outer shell pressure relief channel is communicated with the fluid flow cavity inside the plug inner core 120, and the fluid flow cavity can be relieved through the outer shell pressure relief channel. When the core relief port 129 is not in communication with the shell relief port 144, the fluid flow through chamber 121 is not in communication with the shell relief passage.

At least one first elastic member 130 is disposed in the accommodating groove 111 for normally driving the plug core 120 away from the communication position. In this manner, the first elastic member 130 drives the plug core 120 away from the communication position when the plug core 120 is not in plug-in engagement with the socket 200. In the process of plugging and matching the plug inner core 120 with the charging plug, a worker does work, overcomes the elastic potential energy of the first elastic member 130, and can move the plug inner core 120 to the communication position.

It can be seen from this that, in this embodiment, the pressure release channel is an on-off adjustable fit, and when the charging plug 100 is not in plug-in fit with the socket 200, the pressure release opening 144 of the outer shell is dislocated from the pressure release opening 129 of the inner core, and the pressure release channel is not communicated. Therefore, when the air tightness of the channel through which the heat exchange fluid flows, such as the fluid flowing cavity 121, in the charging plug is detected, the test error caused by the communication of the pressure release channel can be avoided.

It will be appreciated that the communication position may be located in the middle of the travel of the plug core 120 in the receiving slot 111, where the first resilient member 130 may drive the plug core 120 away from the communication position in a direction away from the slot bottom wall of the receiving slot 111, or may drive the plug core 120 away from the communication position in a direction toward the slot bottom wall of the receiving slot 111. Of course, since the receptacle 200 will force the plug core 120 to approach the bottom wall of the receiving groove 111 when the charging plug 100 is in plug-in engagement with the receptacle 200. Therefore, referring to fig. 2, in an embodiment, the communication position is a travel end position of the plug core 120 in the accommodating groove 111, where the travel end position moves toward the groove bottom wall of the accommodating groove 111, and the first elastic member 130 often drives the plug core 120 away from the communication position in a direction away from the groove bottom wall of the accommodating groove 111.

Specifically, the plug core 120 is brought close to the opening of the accommodation groove 111 at the stroke start position of the accommodation groove 111, and then is moved inward in the insertion direction of the accommodation groove 111 until it reaches the stroke end position thereof. In this way, when the worker pushes the plug housing 110 to overcome the elastic potential energy of the first elastic member 130 and plug the socket 200 and the plug core 120, the plug core 120 will stay at the stroke end position relative to the accommodating groove 111, that is, the plug core 120 will not move further in the insertion direction (from top to bottom) of the accommodating groove 111 no matter how the worker applies force again without damaging the charging plug 100. The plug inner core 120 at the stroke end position is located at the communication position, so that when the plug inner core 120 is in plug-in fit with the plug groove 210 of the socket 200, the plug inner core 120 synchronously moves to the communication position to communicate the shell pressure relief opening 144 with the inner core pressure relief opening 129, thereby facilitating the operation of staff and further improving the operation efficiency.

It should be noted that, the opposite and communication between the inner core pressure relief port 129 and the outer shell pressure relief port 144 may be that one of them is provided with a pressure relief valve such as a one-way valve or a two-way valve, and the pressure relief valve assembly may include at least one such pressure relief valve. When the core relief port 129 and the shell relief port 144 are opposite to each other and the space satisfies the requirement and the internal pressure satisfies the requirement, the relief valve is turned on. If the shell pressure relief opening 144 is formed in the bottom wall of the accommodating groove 111, and the inner core pressure relief opening 129 is formed in the lower end face of the plug inner core 120, the shell pressure relief opening 144 and the inner core pressure relief opening 129 are close to or far away from each other in the axial direction of the plug shell 110, and when the two are close to each other until the two are communicated, the shell pressure relief opening 144 is communicated with the inner core pressure relief opening 129, and the pressure relief valve is conducted when the internal pressure meets the requirement. Conversely, when the two are separated from each other and not conducted, the pressure release valve is difficult to be closed by the internal pressure, so that the heat exchange fluid at the outer shell pressure release port 144 or the inner core pressure release port 129 is prevented from leaking into the accommodating groove 111. Or in an embodiment, the groove side wall of the accommodating groove 111 is provided with a shell pressure relief opening 144, and the position where the outer peripheral wall of the inner core of the plug inner core 120 is matched with the groove side wall of the accommodating groove 111 is provided with at least one inner core pressure relief opening 129.

At this time, when the plug core 120 slides in the accommodation groove 111, the housing relief port 144 and the core relief port 129 are displaced from each other to partially oppose each other in the axial direction of the plug housing 110, and then until they are opposed. Specifically, in the non-communication position, the outer shell relief vent 144 is blocked by the outer peripheral wall of the plug inner core 120, and the inner core relief vent 129 is blocked by the groove side wall of the receiving groove 111. During movement of the plug core 120 toward the communication position, the outer shell relief vent 144 and the core relief vent 129 begin to partially communicate until the two are fully aligned and in communication with each other.

It is easy to see that, in this embodiment, the shell pressure relief opening 144 is formed in the groove side wall of the accommodating groove 111, the inner core pressure relief opening 129 is formed in the outer peripheral wall of the inner core, and the shell pressure relief opening 144 and/or the inner core pressure relief opening 129 are naturally plugged when staggered, so that the risk that heat exchange fluid of the shell pressure relief opening 144 and/or the inner core pressure relief opening 129 leaks into the accommodating groove 111 is reduced, and the internal structure of the charging plug is simpler and more reliable.

The casing pressure relief opening 144 is formed in the groove side wall of the accommodating groove 111, so that the casing pressure relief channel is defined in the radial outer side of the accommodating groove 111, such as the plug casing 110 buried in the groove side wall of the accommodating groove 111. It will be appreciated that this approach may result in an increase in the wall thickness of the plug housing 110 to ensure structural strength of the plug housing 110. Therefore, referring to fig. 2 to 4, in an embodiment, the charging plug 100 further includes a holding member fixedly disposed on the outer peripheral wall of the plug housing 110, the holding member is provided with a handle pressure relief opening 143, a portion of the holding member near the first housing end (for example, an upward portion in the drawing) extends into the accommodating groove 111 and is provided with a housing pressure relief opening 144, an intermediate pressure relief channel 141 is defined in the holding member, and the intermediate pressure relief channel 141 is communicated with both the housing pressure relief opening 144 and the handle pressure relief opening 143; wherein the handle pressure relief port 143 communicates with the housing pressure relief channel.

Specifically, the grip is a part provided on the plug housing 110 such as a handle, grip, etc., that facilitates a worker to grip the plug housing 110 and facilitate pushing the charging plug into the receptacle 200. It will be appreciated that a plurality of handles may be symmetrically disposed for the convenience of the operator's application of force, or a plurality of handles may be disposed at uniform intervals along the circumference of the housing of the charging plug 100.

Referring to fig. 2 to 4, a handle is described below as an example. The handle is disposed along the axial direction of the plug housing 110 with its upper end adjacent to the upper end of the plug housing 110 and its lower end adjacent to the lower end of the plug housing 110. The middle portion of the handle may be spaced from the outer peripheral wall of the plug housing 110 for ease of handling by the operator.

The handle defines a middle pressure release channel 141 therein, and the lower end of the handle is provided with a handle pressure release opening 143 communicated with the middle pressure release channel 141, and the handle pressure release opening 143 is communicated with the housing pressure release channel of the plug housing 110. Referring to fig. 3, the handle pressure relief opening 143 may be specifically formed at a lower end face of the handle, at this time, the lower end face of the handle may be tightly attached to the outer peripheral wall of the plug housing 110 by a fastener such as a screw, and the housing pressure relief channel extends to a position of the outer peripheral wall of the plug housing 110 opposite to the handle pressure relief opening 143, so that the middle pressure relief channel 141 in the handle is communicated with the housing pressure relief channel in the plug housing 110. Of course, the lower end of the handle may also pass through the outer peripheral wall of the plug housing 110 to enter the plug housing 110 so that the handle pressure relief port 143 communicates with the housing pressure relief passage. It should be noted that the handle with the middle pressure release channel 141 may be only one of the handles, or may be multiple or all of the handles.

The upper end of the handle may extend to the accommodating groove 111 and extend between a portion of the peripheral wall of the plug core 120 and the groove sidewall of the accommodating groove 111, and a housing pressure relief opening 144 is formed. As such, in the radial inside to radial outside direction of the charging plug 100, a part of the outer peripheral wall of the plug core 120 and one side end face of the upper end of the handle are opposed to each other and both are relatively slidable. So that the upper end of the handle mates with the plug core 120 instead of the slot side walls of the receiving slot 111 without the need to provide a housing relief vent 144 in the plug housing 110.

It can be seen that, in this embodiment, the shell pressure relief opening 144 which is in dislocation adjustable fit with the inner core pressure relief opening 129 of the plug inner core 120 is designed on the handle, and the inner space of the handle is fully utilized to define the middle pressure relief channel 141 which is communicated with the shell pressure relief channel, and compared with the shell pressure relief opening 144 which is formed on the side wall of the accommodating groove 111, the structural strength of the plug shell 110 can be remarkably improved, and the increase of the wall thickness and other dimensions of the plug shell 110 can be avoided.

Referring to fig. 2 to 4 and fig. 7 and 8, in an embodiment, a portion of the surface of the outer peripheral wall of the inner core is recessed to form a handle chute 123, the handle chute 123 extends to two axial ends of the plug inner core 120 along the axial direction of the plug outer shell 110, and the wall of the handle chute 123 is provided with an inner core pressure relief port 129; the portion of the grip member near the first housing end (e.g., the portion facing upward in the drawing) extends into the receiving groove 111 to form a sliding portion 142, and the sliding portion 142 is slidably fitted in the handle chute 123.

Specifically, the portion of the outer peripheral wall of the plug core 120 that does not engage with the handle is in close contact with and slides relative to the groove side wall of the accommodating groove 111. While the portion of the outer peripheral wall of the plug core 120 that mates with the handle is recessed radially of the plug core 120 to form a handle slide groove 123 for sliding the handle. And in the axial direction of the plug housing 110, both ends of the handle chute 123 extend to both axial end surfaces of the plug core 120, i.e., an upper end surface of the plug core 120 and a lower end surface of the plug core 120.

Further, the upper end of the handle extends into the handle slide groove 123 to form a corresponding sliding portion 142 such as a slider, so that the handle can smoothly slide in the handle slide groove 123. In this way, a corresponding sliding space is partitioned for the handle in the space formed by the accommodating groove 111, and the handle slides in the sliding space, so that not only can most of the surface of the plug inner core 120 be clung to the groove side wall of the accommodating groove 111 to improve the aesthetic degree, but also most of the peripheral wall of the plug inner core 120 can provide a corresponding restraining force to enable the movement of the plug inner core 120 in the accommodating groove 111 to be more stable.

Of course, the sectional shape of the sliding portion 142 coincides with the sectional shape of the handle chute 123, so that the sliding portion 142 and the handle chute 123 can also stably slide relative to each other.

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

It will be appreciated that when the sliding portion 142 is configured as a slider or the like, at least 3 side wall surfaces thereof slidably engage the handle chute 123, and the housing pressure relief opening 144 may be provided on any one of the 3 side wall surfaces. In one embodiment, the groove side wall of the receiving groove 111 has an engagement area with the sliding portion 142; the side wall of one side of the sliding part 142, which is away from the matching area, is provided with a shell pressure relief opening 144, and the side wall of one side of the handle sliding groove 123, which is opposite to the matching area, is provided with an inner core pressure relief opening 129.

Specifically, referring to fig. 3 and 4, for any sliding portion 142, a side surface of the sliding portion facing away from the plug core 120 is opposite to a portion of a surface of the accommodating groove 111, where the portion of the surface is a mating region of a groove sidewall of the accommodating groove 111 that mates with the sliding portion 142. The side wall of the sliding part 142, which is away from the matching area, is provided with a shell pressure relief opening 144, and correspondingly, the side wall of the handle chute 123, which is opposite to the matching area, is provided with an inner core pressure relief opening 129.

Compared with the inner core pressure relief opening 129 formed on the left and right side walls of the handle chute 123 (the two sides of the opposite matching area of the sliding portion 142 and the accommodating groove 111), the inner core pressure relief opening 129 formed on the wall of the side of the opposite matching area of the handle chute 123, so that after the inner core pressure relief opening 129 and the outer shell pressure relief opening 144 are communicated, when the fluid in the fluid flow cavity 121 circulates along the established pressure relief channel, the number of the passing bent portions is small, the whole flow path is smoother, and the pressure relief effect is improved.

It is worth mentioning that the charging terminal may extend to a portion of the plug core 120 where no fluid flow cavity is opened. Or in an embodiment, a part of the charging terminal to be cooled is disposed in the fluid flow cavity 121, and another part of the charging terminal to be cooled penetrates through an end face of the bottom wall of the accommodating groove 111 of the plug core 120 to be exposed from the plug core 120; a part of the above-mentioned charging harness is disposed in the fluid flow chamber 121 and connected to the corresponding charging terminal to be cooled, and another part of the charging harness sequentially penetrates through the plug inner core 120 toward the end face of the bottom wall of the accommodating groove 111 to extend into the plug housing 110. Wherein the fluid flows through the cavity 121 for the insulating heat exchange fluid to flow through. Of course, the outer peripheral surface of the charging harness is usually provided with an insulating layer such as an insulating glue layer, and the outer peripheral surface of the charging terminal may also be provided with an insulating layer, and at this time, the fluid flowing through the cavity 121 can be used for flowing a greater variety of cooling fluids.

In this embodiment, in order to achieve direct contact cooling of the charging terminals, an insulating heat exchange fluid flows through the fluid flow chamber 121. At least part of the plurality of charging terminals required for charging is a charging terminal to be cooled, a main body part of the charging terminal to be cooled is positioned in the fluid flow cavity 121 and is in direct contact with the insulating heat exchange fluid, and a pin end of the charging terminal is exposed from the upper end face of the plug inner core 120. Each charging terminal to be cooled is connected with a 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 housing 110, one end of the charging harness extends to the lower end face of the plug housing 110 and is exposed to be connected with the corresponding wire core of the cable, and the other end of the charging harness sequentially penetrates through the groove bottom wall of the accommodating groove 111 and the lower end face of the plug inner core 120 and extends into the fluid flow cavity 121 to be connected with the corresponding charging terminal to be cooled.

It is apparent that, when the charging plug 100 in this embodiment conveys heat exchange fluid such as cooling liquid, the charging terminal to be cooled and the charging harness in the charging plug 100 are also cooled, so that this embodiment provides cooling measures for each heat-generating key component of the charging plug 100 in the charging process, so as to significantly improve the heat-generating phenomenon of each key component in the charging process. Thus, by the cooling scheme provided in the present embodiment, the charging plug 100 can support a larger-rate charging power and reduce the charging time, i.e. can support a faster quick charging technique.

In addition, in this embodiment, the insulating heat exchange fluid may directly contact with the charging terminal to be cooled, so compared with the liquid cooling technology in the related art, under the same power, the insulating heat exchange fluid can be used for avoiding design of isolation measures (isolation of the cooling liquid and the heat dissipation parts), so that the charging plug is smaller in size and lighter in weight, the purpose of light-weight design is achieved, other auxiliary materials are saved, better production cost control can be achieved, and the convenience of personnel operation is improved.

It should be noted that, when the charging function is provided, the materials of the plug outer shell 110 and the plug inner core 120 should meet the requirements of insulation performance, flame retardance, weather resistance, low temperature toughness and the like, and one or more materials of PC (polycarbonate), ABS (acrylonitrile butadiene styrene) and PBT (polycarbonate/polybutylene terephthalate) can be adopted.

It will be appreciated that each region has corresponding standards for the interface layout of the charging plug 100, and in order to accommodate such standards, in one embodiment, referring to fig. 1 and 9, an end face of the plug core 120 facing away from the bottom wall of the receiving slot 111 includes a standard charging interface portion 124 and an expansion region, and the expansion region is provided with a plurality of fluid interfaces 122 communicating with the fluid flow through cavities; all of the charging terminals to be cooled include a plurality of standard charging terminals, and all or part of the standard charging terminals are disposed at the standard charging interface 124.

Specifically, the upper end surface of the plug core 120 includes a standard charging interface 124 and an extension area, and all or part of the standard charging terminals of all the charging terminals to be cooled are disposed at the standard charging interface 124 and arranged in a layout manner specified by the corresponding standard, which may be understood that at least part of the standard charging terminals are disposed at the standard charging interface 124 and arranged in a layout manner specified by the corresponding standard. Of course, the shape and size of the standard charging interface 124 are also performed according to the corresponding standard. While the expansion region is located at one side of the standard charging structure region, and at least one of the nonstandard charging terminal of the charging terminals to be cooled, the fluid interface 122, and the charging terminal without cooling is arranged in the expansion region; of course, standard charging terminals, some of which have standard shape and dimensions, may also be provided in the extension area. The fluid interface 122 communicates with the fluid flow cavity 121 and is in plug-in fit with the fluid charging plug on the socket 200, so that heat exchange fluid such as cooling fluid flowing through the cavity 121 can be delivered into the socket 200.

In this way, the charging plug 100 provided in the present embodiment may be mated with the standard socket 200, so as to improve the adaptability of the charging plug 100 in the present embodiment.

It can be appreciated that for electric vehicles such as eVTOL, the body of the electric vehicle includes not only a main power source such as a power battery, but also an emergency low-voltage power source. Generally, the emergency low-voltage power supply is a 28V low-voltage emergency storage battery, so that in the event of a failure of a eVTOL main power supply, the emergency low-voltage power supply can rapidly take over, provide necessary power support for key systems (such as an airplane control system, a navigation system, a communication system and the like) of eVTOL, and ensure that eVTOL can safely and stably land. In general, emergency power supplies should also be cycled for charge and discharge at intervals (e.g., every three months) when not in use for a long period of time to preserve battery activity and extend service life. In the related art, emergency power supplies are typically charged by a relatively high voltage power battery in an electric vehicle; however, the power battery may have too low an amount of power, a failure or a damaged charging line between the two may result in a failure of the emergency power supply to charge. Thus, referring to fig. 1 and 10, in an embodiment, the charging plug 100 further includes a plurality of low voltage emergency power terminals 150, and all or a portion of the low voltage emergency power terminals 150 are disposed in the expansion area, which is understood to mean that at least a portion of the low voltage emergency power terminals 150 are disposed in the expansion area. It will be appreciated that if part of the low voltage emergency power supply terminal 150 is disposed at the standard charging interface 124, it is sufficient to avoid connection interference of the low voltage emergency power supply terminal 150 to other standard charging terminals.

Of course, the corresponding socket 200 also has a corresponding low voltage emergency charging plug therein, which cooperates with the low voltage emergency power terminal 150 to establish a charging path for the emergency low voltage power supply.

Thus, after the charging plug 100 provided in this embodiment is connected to the socket 200, not only the main power supply can be charged, but also the emergency low-voltage power supply can be charged, so that the functions of the charging plug 100 are expanded to reduce the steps during eVTOL ground maintenance. Of course, it will be appreciated that whether or not the low voltage emergency power terminal 150 is operational may be controlled by a worker in accordance with a job task when the charging plug 100 is mated with the receptacle 200.

In addition, the low voltage emergency power supply terminal 150 can also provide stable low voltage power supply input during ground commissioning, functioning as a ground power supply input interface.

In addition, all or a portion of the low voltage emergency power supply terminals 150 remain disposed in the expansion area. Thus, the charging plug provided in this embodiment not only can charge the main power supply, but also can charge the low-voltage emergency power supply, and can also cooperate with the standard socket 200 to improve the suitability of the charging plug 100 in this embodiment.

It should be noted that the low-voltage emergency power supply terminal 150 may extend to the point where the fluid flows through the cavity 121 to be cooled in direct contact with the insulating heat exchange fluid. Or because the low-voltage emergency power terminal 150 generates limited heat during operation, the low-voltage emergency power terminal 150 can also extend to a portion of the plug core 120 where the fluid flowing through the cavity 121 is not provided, that is, the low-voltage emergency power terminal 150 and the corresponding charging harness are not subjected to submerged cooling, thereby improving safety.

It is understood that the relative positional relationship between the standard charging interface 124 and the expansion area may be that the standard charging interface 124 is included, and the expansion area surrounds the outside of the standard charging interface 124. Or the standard charging interface 124 and the extension area may be arranged side-to-side. Alternatively, in an embodiment, referring to fig. 10, the extension regions include a first extension region 125a and a second extension region 125b, and the first extension region 125a and the second extension region 125b are symmetrically disposed at two sides of the standard charging interface 124.

Specifically, the standard charging interface 124 is located at the geometric center of the plug core 120, and the first extension region 125a and the second extension region 125b are symmetrically disposed on the left and right sides of the standard charging interface 124. As shown in fig. 1, in an example, the plug core 120 has a substantially rectangular cross-sectional shape, and a standard charging interface 124 having a circular shape at the geometric center of the rectangle is provided with a first extension 125a and a second extension 125b on both sides.

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

In a symmetrical arrangement, the fluid interface 122 and the low voltage emergency power terminal 150 may be aligned together after the operator aligns the standard charging interface 124 with the corresponding area on the receptacle 200. In this way, the upper end surface of the plug inner core 120, on the basis of meeting the standard specification, also improves the aesthetic degree of the charging plug and the inserting efficiency through the symmetrical layout.

It should be noted that, after the insulating heat exchange fluid enters the electric vehicle such as eVTOL through the fluid interface 122, heat exchange is performed between the insulating heat exchange fluid and the module such as the electric core in the power battery. Since a large amount of insulating heat exchange fluid is required to achieve the set temperature control target, a large amount of insulating heat exchange fluid needs to be returned to the surface thermal management system after heat exchange. For this case, the insulating heat exchange fluid may exit eVTOL or other electric vehicles through dedicated return lines and return to the surface thermal management system. Alternatively, referring to fig. 5, 6, 7 and 8, in an embodiment, the fluid flow chamber 121 is divided into a first fluid flow chamber 121a and a second fluid flow chamber 121b by a partition plate, and the flow directions of the insulating heat exchange fluid in the first fluid flow chamber 121a and the second fluid flow chamber 121b are opposite. At least a portion of the first fluid flow through chamber 121a is opposite the first expansion region 125a and at least a portion of the second fluid flow through chamber 121b is opposite the second expansion region 125 b.

As such, fluid flow through the cavity 121 includes not only the fluid outlet channel for the insulating heat exchange fluid to enter eVTOL or other electric vehicles, but also the fluid inlet channel for the insulating heat exchange fluid to return to the surface thermal management system. Of course, the first fluid flow through chamber 121a may be one of a liquid inlet channel and a liquid outlet channel, and the second fluid flow through chamber 121b may be the other of the liquid inlet channel and the liquid outlet channel.

In the related art, in the process of cooling the ground, the fluid channel of the cooling circuit is long due to eVTOL and other external equipment; in order to accelerate cooling efficiency, the temperature of the inlet liquid of the cooling loop in the external equipment is usually lower, and the temperature difference between the inlet liquid and the outlet liquid in the battery system of the external equipment in the cooling process is larger. Accordingly, in the above-described embodiments, the charging plug can be separated into the first fluid flow chamber 121a and the second fluid flow chamber 121b by the partition plate by the fluid flow chamber 121, and the liquid in and out direction can be switched by the first fluid flow chamber 121a and the second fluid flow chamber 121b, so that the internal temperature difference of the battery system of the external device to which the charging plug corresponds can be reduced to a large extent by timing switching of the liquid in and out direction.

Alternatively to this embodiment, the first expansion region 125a is directly opposite at least a portion of the first fluid flow chamber 121a such that all of the low voltage emergency power terminals in the first expansion region 125a extend into the first fluid flow chamber 121a and all of the fluid interfaces 122 are in communication with the first fluid flow chamber 121 a. The second expansion region 125b is directly opposite at least a portion of the second fluid flow chamber 121b such that all of the low voltage emergency power terminals in the second expansion region 125b extend into the first fluid flow chamber 121a and all of the fluid interfaces 122 are in communication with the second fluid flow chamber 121 b.

It should be noted that, referring to fig. 5, the insulating heat exchange fluid in the first fluid flowing through the cavity 121a and the insulating heat exchange fluid in the second fluid flowing through the cavity 121b may be insulating heat exchange fluid in the same closed loop fluid circuit, for example, the insulating heat exchange fluid in the first fluid flowing through the cavity 121a is insulating heat exchange fluid in the liquid inlet direction in the same closed loop fluid circuit, and the insulating heat exchange fluid in the second fluid flowing through the cavity 121b is insulating heat exchange fluid in the liquid outlet direction in the same closed loop fluid circuit. The structure mode can reduce the complexity of the system structure, reduce the volume and the weight of the connector and the cable, and is convenient for operation and maintenance.

Of course, since the heat productivity of the charging terminal at the junction of the electrical connection is large, if the insulating heat exchange fluid in the plug inner core 120 is in the same closed loop fluid circuit, the temperature of the insulating heat exchange fluid flowing through the plug inner core may be significantly affected, so as to affect the heat exchange effect of the insulating heat exchange fluid flowing into the electric vehicles such as eVTOL on the power battery. Thus, referring to fig. 6, as an alternative to the present embodiment, a first fluid flowing through the cavity 121a defines a first sub-cavity 121a1 and a second sub-cavity 121a2, and a second fluid flowing through the cavity 121b defines a third sub-cavity 121b1 and a fourth sub-cavity 121b2; wherein a portion of all low voltage emergency power terminals extend into the first subchamber 121a1, a portion of all fluid interfaces 122 communicate with the second subchamber 121a2, another portion of all low voltage emergency power terminals extend into the third subchamber 121b1, and another portion of all fluid interfaces 122 communicate with the fourth subchamber 121b 2.

It should be noted that, at this time, the first subchamber 121a1 and the second subchamber 121a2 may be connected to the same fluid channel, or may be connected to different fluid channels with the same flow direction of the insulating heat exchange fluid, which is not limited in this embodiment. Similarly, the third subchamber 121b1 and the fourth subchamber 121b2 may be connected to the same fluid channel, or may be connected to different fluid channels with the same direction of flow of the insulating heat exchange fluid, respectively, which is not limited in this embodiment.

It will be appreciated that the first subchamber 121a1 and the second subchamber 121a2 may be separated from each other in the first fluid flow chamber 121a, or may be separated from each other in the second fluid flow chamber, which is not limited in this embodiment. Similarly, the third sub-chamber 121b1 and the fourth sub-chamber 121b2 may be separated from each other in the left-right direction or in the inside-outside direction, which is not limited in this embodiment. In addition, the first subchamber 121a1 and the second subchamber 121a2 are independent from each other, the first subchamber 121a1 is in the charging device circuit for cooling the corresponding low voltage emergency power supply terminal, and the second subchamber 121a2 is in the battery pack cooling circuit for insulating the temporary storage of heat exchange fluid between the power battery and the ground thermal management system in the liquid inlet direction (or in the liquid outlet direction). Similarly, the third subchamber 121b1 and the fourth subchamber 121b2 are independent of each other, the third subchamber 121b1 is in the charging device circuit for cooling the corresponding low voltage emergency power supply terminal, and the fourth subchamber 121b2 is in the battery pack cooling circuit for temporarily storing insulating heat exchange fluid in the liquid outlet direction (or liquid inlet direction) between the power battery and the ground thermal management system.

It is easy to see that the insulating heat exchange fluid which exchanges heat with the charging terminal and the charging wire harness circulates in the charging device cooling loop, the insulating heat exchange fluid which is conveyed into the power battery circulates in the battery pack cooling loop, and the two loops are independent loops relative to each other.

Of course, in some embodiments, for the first fluid flow cavity 121a and the second fluid flow cavity 121b that are separated by the partition structure and are independent of each other, all the fluid interfaces 122 that are in communication with the first fluid flow cavity 121a are used for connecting the liquid inlet end of the cooling circuit of the external device, and all the fluid interfaces 122 that are in communication with the second fluid flow cavity 121b are used for connecting the liquid outlet end of the cooling circuit of the external device, so that after the first fluid flow cavity 121a is connected to the external heat exchange fluid, the pressure of the external heat exchange fluid can be applied to the cooling circuit of the external device more, so that the flow resistance in the cooling circuit is overcome, and the heat exchange fluid can sequentially flow through the first fluid flow cavity 121a, the cooling circuit of the external device, and the second fluid flow cavity 121b in order, which reduces the risk that the heat exchange fluid flows from the first fluid flow cavity 121a directly to the second fluid flow cavity 121b, and is beneficial for improving the heat exchange efficiency. It is understood that the plurality of fluid interfaces 122 communicating with the first fluid flow chamber 121a may be respectively connected to respective liquid inlet ends of the cooling circuits on the external device, and the plurality of fluid interfaces 122 communicating with the second fluid flow chamber 121b may be respectively connected to respective liquid outlet ends of the cooling circuits on the external device.

In addition, referring to fig. 8, a pressure relief three-way channel is defined in the plug body, specifically, the plug inner core 120 may further define a pressure relief three-way channel, where the pressure relief three-way channel of the body includes the pressure relief three-way channel; the first end of the pressure relief three-way channel is communicated with the first fluid flow cavity 121a, and the second end of the pressure relief three-way channel is communicated with the second fluid flow cavity 121 b; in addition, a third end of the pressure relief three-way passage may be in communication with the core pressure relief port 129 described above; the charging plug 100 further includes two pressure relief valves, one pressure relief valve disposed at the first end and the other pressure relief valve disposed at the second end.

Referring to fig. 8, specifically, the plug core 120 may be separated into a chamber in a region between the first fluid flow chamber 121a and the second fluid flow chamber 121b and corresponding to the core pressure relief port 129, and a Y-tube is installed in the chamber, and defines a pressure relief three-way channel therein, wherein the first end extends to communicate with the first fluid flow chamber 121a, the second end extends to communicate with the second fluid flow chamber 121b, and the third end extends to communicate with the core pressure relief port 129.

Referring to fig. 7 and 9, in order to facilitate smooth pressure relief, the central axes of the sections of the Y-shaped tube are on the same radial plane of the plug core 120, and the central axis of the third end is collinear with the central axis of the core pressure relief port 129, so that the Y-shaped tube and the core pressure relief port 129 are located at the same height in the axial direction of the plug housing 110, and the third end of the Y-shaped tube is opposite to the core pressure relief port 129. In this way, insulating heat exchange fluid entering the pressure relief three-way passage from either the second end or the first end can smoothly flow into the core pressure relief port 129.

It should be noted that the pressure relief three-way channel is used when an abnormal situation occurs in the transportation 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 further includes two pressure relief valves, one of which is disposed at the first end, and the other of which is disposed at the second end. It will be appreciated that the pressure relief valve may be a one-way valve or a two-way valve, and the present embodiment is not limited in this regard.

In addition, the liquid inlet and outlet directions of the liquid inlet and outlet loop of the charging plug can be switched, and the charging plug can be understood as a symmetrical loop; in this embodiment, the charging plug defines a pressure relief three-way channel in the plug inner core 120, so that pressure relief requirements of different loops during liquid-to-liquid switching can be met, and the convenience of use of the charging plug is improved.

When the charging plug 100 is used as a charging plug, particularly as a quick-charge charging plug, the standard charging terminal generates a large amount of heat, and therefore it is necessary to cool it. Referring to fig. 7 and 8, in an embodiment, the plug core 120 further defines a first standard cavity 121c and a second standard cavity 121d, and the first standard cavity 121c, the second fluid flow cavity 121b, the second standard cavity 121d, and the first fluid flow cavity 121a are sequentially distributed along the circumferential direction of the plug core 120 on a radial plane of the plug core 120; the high-voltage direct current positive terminal and the low-voltage auxiliary power positive terminal in the standard charging terminals are connected with corresponding charging wire harnesses in the first fluid flow cavity 121a, and the high-voltage direct current negative terminal and the low-voltage auxiliary power negative terminal in the standard charging terminals are connected with corresponding charging wire harnesses in the second fluid flow cavity 121 b; the charging plug further comprises a first communication terminal, a second communication terminal, a first charging connection terminal, a second charging connection terminal and a grounding terminal, wherein the first communication terminal, the second communication terminal, the first charging connection terminal and the second charging connection terminal are all arranged at the position of the standard charging interface part 124, which is opposite to the first standard cavity 121 c; the ground terminal is provided at a position of the standard charging interface 124 facing the second standard cavity 121 d; the outer peripheral wall of the plug inner core 120 at the first standard cavity 121c is provided with an inner core pressure relief port 129, and a pressure relief three-way channel is defined in the first standard cavity 121 c.

Specifically, taking the standard charging interface 124 as an example of a direct current 9 card layout area, the standard charging interface includes direct current power supply (dc+, DC-), vehicle and pile common ground (PE), message interactive communication (s+, S-), vehicle and pile connection confirmation communication (CC 1, CC 2), and low voltage auxiliary power supply (a+, a-) as many as 9 standard charging terminals. 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 grounding 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.

The first fluid flow-through chamber 121a is not only opposite to the first expansion region 125a, but also opposite to the region where the dc+ terminal and the a+ terminal are located in the standard charging interface 124, so that both the dc+ terminal and the a+ terminal extend into the first fluid flow-through chamber 121a to be connected to the corresponding charging harness. The second fluid flow-through chamber 121b is not only opposite the first expansion region 125a, but also opposite the region where the DC-terminal and the a-terminal are located in the standard charging interface 124, such that both the DC-terminal and the a-terminal extend into the second fluid flow-through chamber 121b to connect with the corresponding charging harness.

In this way, the charging plug 100 provided in this embodiment may further realize cooling of DC high-voltage devices such as dc+ terminals, a+ terminals, DC-terminals, a-terminals, and the like, and provide further cooling measures for each heating key component of the charging plug 100 in the charging process, so as to significantly improve the heating phenomenon of each key component in the charging process. Thus, by the cooling scheme provided in the present embodiment, the charging plug 100 can support a larger-rate charging power and reduce the charging time, i.e. can support a faster quick charging technique.

However, for the s+ terminal, the S-terminal, the CC1 terminal, the CC2 terminal, and the PE terminal, since the standard charging terminal does not generate heat significantly during charging, the terminal does not extend into the first fluid flow chamber 121a or the second fluid flow chamber 121b in order to avoid contact with the insulating heat exchange fluid and increase the risk of leakage. To receive the portion of the standard charging terminal in the plug core 120, a first standard cavity 121c and a second standard cavity 121d are defined within the plug core 120. Wherein, in the axial direction of the plug 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 should be noted 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, so as to achieve dry-wet isolation in the plug core 120, so as to improve the overall safety of the plug core 120.

In addition, an inner core pressure relief port 129 is provided in the outer peripheral wall of the plug inner core 120 at the first standard cavity 121c, and a pressure relief three-way passage is defined in the first standard cavity 121 c. At this time, the aforementioned Y-tube is disposed in the first standard chamber 121 c. Thus, the present embodiment integrates the Y-tube into the first standard cavity 121c, thereby fully utilizing the space within the plug core 120. Of course, in other embodiments, a Y-tube may be disposed in the second standard cavity 121d, so as to establish a pressure release channel with the corresponding handle.

In some embodiments, the fluid flow chamber 121 is divided into a separate circuit connection chamber and a charge cooling chamber, which may be separated by a separation assembly such as a separator plate; the loop connecting cavity is respectively communicated with the fluid channel and the fluid interface 122, and the shell pressure relief channel is communicated with the loop connecting cavity; at least one of a portion of the charging terminal to be cooled and a portion of the charging harness is disposed within the charging cooling cavity, and the charging cooling cavity is in communication with the fluid passage. In the embodiment, the heat exchange fluid such as the cooling liquid in the loop connecting cavity can independently carry out heat management on the external equipment through the cooling loop of the external equipment, so that the accuracy of carrying out heat management on the external equipment is improved, and the temperature uniformity of each position of the external equipment is improved. In addition, the heat exchange fluid in the charging cooling cavity can independently radiate heat to the charging terminal or the charging wire harness to be cooled, so that the heat radiation efficiency is improved.

Referring to fig. 1 and 2, in one embodiment, the plug housing 110 further defines a device cavity 112 therein, and the device cavity 112 is disposed between the receiving groove 111 and a second housing end of the plug housing 110, which is at an axial end position of the plug housing 110, such as a lower end in the drawing. The charging plug further comprises a plurality of detection elements, a control module and an operating piece 115, wherein the detection elements are arranged in the plug inner core 120 or the plug outer shell 110, the control module is arranged in the device cavity 112, the control module is respectively in communication connection with each detection element, and the control module is provided with a plurality of status indicator lamps 116; the operating member 115 is disposed on the outer peripheral wall of the plug housing 110, and a portion of the operating member 115 penetrates through the side wall of the plug housing 110 and extends into the device cavity 112 to be connected with the control module; the operating member 115 includes a touch screen and/or control buttons.

The outer peripheral wall of the plug housing 110 is provided with a plurality of through holes, the through holes are communicated with the device cavity 112, and the number of the through holes is consistent with that of the status indicator lamps 116 and corresponds to that of the status indicator lamps one by one, so that each status indicator lamp 116 extends into and exposes out of the corresponding through hole.

Specifically, a detecting element such as a flow sensor, a pressure sensor, a temperature sensor, etc. may be installed in the plug core 120, and is used to detect parameters such as a flow rate, a pressure, and a temperature of the fluid flowing through the cavity. A detection element such as a ammeter or voltmeter may be mounted in the plug housing 110.

The upper portion of the plug housing 110 defines the aforementioned receiving slot 111, while the lower portion of the plug housing 110 defines the device cavity 112. Of course, the accommodating groove 111 and the device cavity 112 may also communicate with each other. The control module in the device cavity 112 may be configured as an integrated control board, on which corresponding modules are disposed, so as to implement communication with the ground charging thermal management device and eVTOL and partial function control operation. Referring to fig. 11, specific details of the communication include, but are not limited to: hydraulic pressure in and out, temperature in and out, flow, fluid path connection status, charge status, discharge status, battery status information, fault or alarm information, history log, thermal management policy identification, environmental information, etc. The function control operation includes, but is not limited to, an emergency stop (charge and discharge stop, intake and intake stop, etc.), information inquiry (connection state confirmation, battery information inquiry, trouble and alarm information inquiry, etc.), communication connection operation (connection of bluetooth, local area network, etc.), and the like.

Thus, the ground thermal management system and eVTOL are communicatively connected (cabled) through the connection of the charging plug 100 to the receptacle 200. eVTOL the communication content includes a flight log, battery status information (including but not limited to total battery voltage, battery cell voltage, charge-discharge current, battery temperature, battery operation data, control device switch status, etc.), equipment status information (including but not limited to on-board ground power supply equipment, on-board ground heat management equipment, etc.), and parameter information collected by the detection elements of the aforementioned flow sensor, pressure sensor, temperature sensor, etc. are also uploaded to the ground heat management system and eVTOL through a communication bus.

It will be appreciated that the ground thermal management system may collect ground energy storage state information (including, but not limited to, energy storage system power, energy storage system output current, energy storage system control device switch state, etc.), charge and discharge parameters (including, but not limited to, charge current, charge power, expected charge duration, etc.), and device state information, thermal management parameters, and device state information (including, but not limited to, cooling and heating power, output flow, in and out liquid temperature, target temperature values, etc.), device operation logs (including operation duration, historical data, fault and alarm information, etc.). Then, the ground thermal management system and eVTOL can transmit the state information to the cloud server for storage or reading in the forms of wired, wireless, bluetooth, local area network and the like when the ground thermal management system and eVTOL are parked.

The control module may display the parameter information collected by the detection elements such as the flow sensor, the pressure sensor, the temperature sensor, etc. through the status indicator lamps 116 on the charging plug 100. Of course, a status indicator 116 for displaying whether the charge and discharge status is normal, whether communication with eVTOL or the ground thermal management system is normal, etc. may also be provided on the plug housing 110. In one example, status indicator lights 116 include, but are not limited to, high voltage charge indicator lights, 28V charge indicator lights, communication indicator lights, thermal management status indicator lights. Further, the plug housing 110 is further provided with operation elements 115 such as a touch panel, a control button, a control knob, and the like, and the respective operation elements 115 are provided with corresponding functions. In one example, the operating member includes, but is not limited to, a communication button and a scram button. The operator can perform a corresponding operation through the operation piece 115.

During the ground charging and discharging and thermal management operation, because the ground thermal management system is far from eVTOL stopping points, when the charging plug 100 and the socket 200 are in abnormal states, operators of the ground thermal management system cannot be notified in time, or the operators cannot be moved to the ground equipment operation platform in time to stop the charging and discharging or thermal management operation. Therefore, after the charging plug 100 and the socket 200 are docked, an operator can observe the running state in real time and nearby through the display state of the status indicator 116 on the charging plug 100 during the ground charging and discharging or thermal management operation. As an example, when an abnormal condition occurs, an operator may complete a nearby emergency stop operation via an emergency stop button on the handheld device or mobile device, or an emergency stop button on the plug housing 110. In a certain example, an operator can also view ground thermal management and charge and discharge state information nearby in real time through a control panel installed on the charging plug, and start or stop operation.

In one embodiment, one end of a housing pressure relief channel included in the body pressure relief channel extends to communicate with an end face of the second housing end, and the other end of the housing pressure relief channel extends to the device cavity 112 to communicate with the device cavity 112; the part of the holding piece close to the second shell end penetrates through the peripheral wall of the shell to extend into the device cavity 112, and a handle pressure relief opening 143 is formed in the end face of the part of the holding piece close to the second shell end; the charging plug further comprises a connecting pipe 145, the connecting pipe 145 is arranged in the device cavity 112, and the handle pressure relief opening 143 is communicated with the body pressure relief channel through the connecting pipe 145.

Referring to fig. 2, specifically, a cable integration head 113 is disposed at a lower end of the plug housing 110, the cable integration head 113 is provided with a plurality of cable perforations, and various charging harnesses or water pipes extend into the device cavity 112 through the cable perforations. Wherein the fluid, which enters the plug core 120 after passing through the device cavity 112, the gap between the receiving groove 111 and the lower end of the plug core 120, the lower end surface of the plug core 120, flows through the cavity. The water pipe comprises a pressure relief pipe, and an outer shell pressure relief channel is defined in the pressure relief pipe. The lower end of the handle extends into the device cavity 112 through the sidewall of the device cavity 112.

In this embodiment, the handle communicates with the pressure relief tube through a connecting tube 145. One end of the connecting pipe 145 is sleeved on the part of the handle extending into the device cavity 112 to realize sealing communication with the pressure release channel of the handle, and the other end of the connecting pipe is inserted into the pressure release pipe to be in sealing communication with the pressure release pipe. The connection pipe 145 may be a hose or a hard pipe, which is not limited in this embodiment. Of course, the hose is more conducive to routing within the device cavity 112 because of the denser routing within the device cavity 112.

And the water pipe further includes a fluid pipe 114 therein, the fluid pipe 114 being for flowing a fluid inputted from the lower end of the plug housing 110 into the plug core 120 through the cavity. In this embodiment, however, the plug core 120 and the plug housing 110 are slidable relative to each other. To achieve sealed communication of fluid flow through the cavity within the plug core 120 with the fluid tube 114, it may be connected by a flexible water tube. However, the longer distance between the lower end surface of the plug core 120 and the bottom wall of the receiving groove 111 when they are away from each other results in longer lengths of the flexible water pipe which would occupy space within the device cavity 112, affecting the length of travel of the plug core 120 within the receiving groove 111, and even reducing the volume of the fluid flow through the cavity forcing the plug core 120 to leave sufficient space to accommodate the flexible water pipe.

Thus, referring to fig. 7, in one embodiment, a bottom wall of the accommodating groove 111 is provided with a passage opening communicating with the fluid passage; the charging plug 100 further includes a pipe joint 126, the pipe joint 126 is convexly disposed at an end face of the plug inner core 120 facing the bottom wall of the groove, the pipe joint 126 is communicated with the fluid flow cavity, the pipe joint 126 includes a plurality of tapered portions sequentially connected along a protruding direction of the pipe joint 126, and in the protruding direction, an outer diameter of the tapered portions is gradually reduced; wherein the nipple 126 is adapted to be inserted into the fluid passageway from the port and the tapered portion is in interference fit with the fluid passageway and is relatively movable to place the fluid flow lumen in sealing movable communication with the fluid passageway.

Specifically, a fluid passage is defined in the fluid pipe 114 in the device chamber 112, and 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 core 120 is convexly provided with a pipe joint 126. The coupler 126 may be integrally formed with the plug core 120 or may be a separate component and fixedly attached to the plug core 120. The pipe joint 126 extends downward along the axial projection of the plug housing 110.

The pipe joint 126 includes a plurality of tapered portions connected in sequence in the protruding direction of the pipe joint 126, and in the protruding direction, the tapered portions gradually decrease in outer diameter. When the pipe joint 126 is matched with the fluid channel, part of the conical part extends into the fluid channel, and part of the peripheral wall of the conical part extending into the fluid channel is in interference fit with the fluid channel, so that the fluid flowing through cavity is in sealing movable communication with the fluid channel.

It will be readily appreciated that in this embodiment, the nipple 126 may extend completely or partially into the fluid passageway during the movement of the plug core 120 away from or toward the bottom wall of the receiving slot 111, always maintaining fluid flow through the cavity in sealing movable communication with the fluid passageway. In this process, the pipe joint 126 does not occupy the moving space of the plug core 120, so that the overall size of the charging plug 100 is reduced, and the internal structure of the charging plug is 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 member such as a seal ring.

The first elastic member 130 may be arranged as a tension spring buried at a groove sidewall of the receiving groove 111, one end of the tension spring is connected with the plug core 120, the other end is fixedly connected with the sidewall of the receiving groove 111, and both ends are spaced apart from each other in an axial direction of the plug housing 110. The 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, so that the lower end surface of the plug inner core 120 can stop against the bottom wall of the accommodating groove 111 in the moving process. But such a structure occupies a groove side space of the receiving groove 111 so that the thickness dimension of the plug housing 110 increases.

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

In addition, the compression spring may be sleeved on the radially outer side of the pipe joint 126, so that it is not necessary to design a guide post structure for installing the compression spring in the receiving groove 111.

In addition, in order to enable the compression springs to have sufficient elastic potential to often drive the plug core 120 away from the communication position, the length dimension of a single compression spring may be large, thereby occupying the space within the groove of the receiving groove 111, thereby affecting the travel distance of the plug core 120 in the receiving groove 111. Accordingly, the first elastic member 130 may be provided in plurality, and stronger elasticity is achieved by a plurality of compression springs having smaller outer diameter sizes and/or length sizes in parallel, thereby replacing a single compression spring. It is apparent that the plurality of first elastic members 130 can reduce the occupation of the slot space of the receiving groove 111 in the height direction, so that the overall plug housing 110 and plug core 120 is more compact.

The invention also proposes a charging gun comprising: the charging plug 100 and the charging cable are connected to a second housing end (for example, a lower end in the drawing) of the plug housing 110 of the charging plug 100, specifically, a wire in the charging cable is electrically connected to a charging terminal of the charging plug 100, so that power can be supplied during charging. The specific structure of the charging plug 100 refers to the above embodiment, and since the charging gun adopts all the technical solutions of all the embodiments, the charging plug at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

Wherein each wire core in the charging cable is connected with a corresponding variety of charging harnesses in the plug housing 110. In addition, a cable fluid passage is defined in the charging cable in fluid communication with the fluid passage of the plug housing 110 for the heat exchange fluid.

The housing pressure relief passage of the plug housing 110 may be directly communicated with the outside, thereby discharging a small amount of the leaked insulating heat exchange fluid to the outside. Or in an embodiment, a pressure relief backflow channel extending along the wiring direction of the charging cable is defined in the charging cable, and the housing pressure relief channel of the charging plug 100 is communicated with the pressure relief backflow channel. Therefore, a small amount of leaked insulating heat exchange fluid is recycled, so that resource waste is avoided, and the insulating heat exchange fluid can be prevented from polluting the external environment.

Referring to fig. 12, the present invention further provides a joint assembly, including: the charging plug 100 and the socket 200, the socket 200 is adapted to be in plug-in fit with the plug core 120 of the charging plug 100, for example, may be in plug-in fit with the charging terminal. The specific structure of the charging plug refers to the above embodiments, and since the present connector assembly adopts all the technical solutions of all the embodiments, at least the charging plug has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

As can be appreciated, referring to fig. 13, the receptacle 200 is provided with a corresponding fluid receptacle 230 to mate with the fluid interface 122 on the charging plug 100.

Since in some embodiments the plug housing 110 is further provided with components such as a control module, the overall weight of the plug housing 110 is heavy, and in order to improve the plug stability between the charging plug and the socket 200, in one embodiment, the socket 200 is adapted to extend into the receiving groove 111 of the charging plug to be in plug-in engagement with the plug core 120 of the charging plug. From this, each charging terminal on plug inner core 120 is pegged graft the cooperation with the corresponding charging plug on socket 200, and the peripheral wall of socket 200 is pegged graft the cooperation with the groove lateral wall of holding tank 111, and two grafting cooperation make the frictional force between charging plug 100 and the socket 200 bigger to the connection between the two is more firm.

Furthermore, in one embodiment, the joint assembly further comprises: the first mating structure and the second mating structure, the third mating structure and the fourth mating structure, the first mating structure is disposed radially outside the socket 200, the second mating structure is disposed on the outer peripheral wall of the plug housing 110, and the first mating structure and the second mating structure are detachably mated; the third mating structure is disposed at the socket slot 210 of the socket 200, the fourth mating structure is disposed at the receiving slot 111 of the plug housing 110, and the third mating structure and the fourth mating structure are detachably mated.

Specifically, in this embodiment, on the basis of the friction force fit connection, the charging plug 100 and the socket 200 further achieve locking by the first and second mating structures outside the charging plug and the socket, and further achieve locking by the third and fourth mating structures inside the accommodating groove 111. It is easy to see that the first mating structure, the second mating structure, the third mating structure and the fourth mating structure are respectively locked from the inner side and the outer side of the charging plug 100, so that the charging plug can be more firmly fixed on the socket 200, and the risk of accidental falling after the charging plug 100 is inserted into the socket 200 is reduced. Therefore, even if the friction force fit fails, the first fit structure, the second fit structure, the third fit structure and the fourth fit structure can avoid liquid leakage or charging faults caused by falling of the charging plug.

It will be appreciated that the first mating structure and the second mating structure may be a buckle, a latch, or the like, and as in an embodiment, referring to fig. 12, the first mating structure is configured as a snap hook 310, and the snap hook 310 is fixedly disposed on the peripheral wall of the socket 200; the second mating structure is configured as a clasp 320, the clasp 320 being rotatably connected to the housing peripheral wall, the clasp 320 being adapted to hook onto the clasp hook 310.

Referring to fig. 12, specifically, a side wall of the plug housing 110 may be protruded to form a ramp, and the ramp is pivotally connected to a fastener 320. The fasteners 320 may be configured as hooks, loops, etc. Correspondingly, the fastening hooks 310 are fixedly mounted on the outer peripheral wall of the socket 200 or the body of the eVTOL at the socket 200. After the socket 200 is inserted into the plug core 120, the fastening member 320 may be rotated until it is hooked to the fastening hook 310. Of course, prior to separating the charging plug from the receptacle 200, the snap-in member 320 is disengaged from the snap-in hook 310.

The third mating structure and the fourth mating structure may also be configured as locking pins, snaps, and the like. Or in an embodiment, the fourth mating structure is configured as a locking hole 330 formed on the outer peripheral wall of the plug housing 110, and the locking hole 330 is in communication with the accommodating groove 111; the third mating structure includes: the lock tongue 343 and the position switching assembly, the lock tongue 343 is arranged in the inserting groove 210, and the lock tongue 343 is configured to be movable between an extending position and a avoiding position, wherein in the extending position, the lock tongue 343 is suitable for extending into the lock hole 330, and in the avoiding position, the lock tongue 343 avoids the plug housing 110; the position switching assembly is disposed in the plugging slot 210, and the position switching assembly is adapted to drive the lock tongue 343 to move from the avoidance position to the extended position when the plug core 120 is plugged into the plugging slot 210.

Referring to fig. 12 to 15, specifically, at least one locking hole 330 is formed in the outer peripheral wall of the housing, and the locking hole 330 extends along the radial direction of the plug housing 110 to communicate with the receiving groove 111.

Since the socket 200 is adapted to extend into the receiving groove 111, the outer circumferential wall of the socket 200 is radially provided with a latch bolt mounting hole extending in the radial direction of the socket 200 to communicate 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 latch 343 is retractable in the radial direction of the plug housing 110 within the latch mounting hole. When the charging plug is plugged into the socket 200, the lock holes 330 and the lock tongue mounting holes are opposite and communicated in a one-to-one correspondence, and when the lock tongue 343 extends to an extending position, the lock tongue 343 protrudes from the peripheral wall of the socket 200 and can extend into the lock holes 330 on the plug housing 110. When the lock tongue 343 is retracted to the avoiding position, the lock tongue 343 may be completely retracted into the lock tongue mounting hole, or may be partially protruded from the outer peripheral wall of the socket 200, so long as the input of the socket 200 into the accommodating groove 111 is not affected, i.e. the lock tongue 343 can avoid the plug housing 110, so that it can slide relative to the outer peripheral wall of the socket 200.

The specific position of the tongue 343 is controlled by the position switching assembly. It will be appreciated that the position switching assembly may be configured as an electromagnet that drives the latch 343 in and out. Or the position switching assembly can also be constructed as an electric control structure consisting of a PLC (Programmable Logic Controller, a programmable logic controller) and an electric control switch. However, the above structure is complicated, and the latch 343 cannot be automatically extended to the extended position when the charging plug 100 is plugged into the socket 200, and additional instructions are required for control.

Therefore, in an embodiment, referring to fig. 15, the locking tongue 343 includes a first fitting hole 3432 and a second fitting hole 3431 which are sequentially opened and communicate with each other in a direction from a radial inner side to a radial outer side of the insertion groove 210, and a size of the first fitting hole 3432 is smaller than a size of the second fitting hole 3431 in a width direction of the locking tongue 343; referring to fig. 14, the position switching assembly includes: the base 341, the limit rod 342, the second elastic member 345 and the third elastic member 344. The base 341 is disposed in the jack groove 210, a rod moving hole is formed in a side wall of the base 341 facing to an opening of the jack groove 210 (refer to a lower side in fig. 14), a lock tongue moving hole is formed in the base 341, the lock tongue moving hole and the lock hole 330 are opposite to each other when the plug inner core 120 is in plug-in fit with the jack groove 210, and an assembly accommodating cavity 3411 which is respectively communicated with the rod moving hole and the lock tongue moving hole is defined in the base 341; wherein, the lock tongue 343 is slidably assembled in the lock tongue moving hole; the limit lever 342 is movably disposed in the lever movable hole along the depth direction of the socket 210, and one end of the limit lever 342 protrudes from the lever movable hole to protrude from a side wall of the base 341 toward the opening of the socket 210 (e.g., protrudes from the lower side in fig. 14), in the insertion direction of the socket 210, the limit lever 342 includes a small diameter portion 3421 and a large diameter portion 3422 disposed in sequence, the outer diameter size of the large diameter portion 3422 is larger than the outer diameter size of the small diameter portion 3421, the limit lever 342 has a limit position in which the large diameter portion 3422 is engaged with the second engagement hole 3431, and a trigger position in which the small diameter portion 3421 is engaged with the first engagement hole 3432; the second elastic piece 345 is disposed in the component accommodating cavity 3411, two ends of the second elastic piece 345 are respectively connected to the seat body 341 and the lock tongue 343, and the second elastic piece 345 drives the lock tongue 343 to move towards the extended position; the third elastic member 344 is disposed in the assembly receiving cavity 3411, and the third elastic member 344 normally drives the limit lever 342 to move toward the trigger position.

Specifically, referring to fig. 14 and 15, the base 341 may be configured as a 匚 plate, and after the base 341 is installed in the plugging slot 210, the opening of the base is facing to the slot sidewall of the plugging slot 210 and is opposite to and communicated with the latch bolt installation hole. At this time, the top plate of 匚 type plate faces the opening direction of the plugging slot 210, and a rod moving hole is formed. It will be appreciated that the top and bottom of 匚 plates are relative to the bottom wall of the mating slot 210; for example, the bottom wall of the socket 210, the bottom plate of the 匚 -type plate member is on the upper side in fig. 14, and the top plate of the 匚 -type plate member is on the lower side in fig. 14. The bottom plate of 匚 type plate can be fixed in the socket 210 by glue bonding, screw fastening or welding. The intermediate plate of 匚 plate member extends in the depth direction of the socket 210 (axial direction of the socket housing) and is spaced apart from the socket side wall of the socket 210 to define the assembly receiving cavity 3411.

The inner end of the tongue 343 extends from within the tongue mounting aperture into the assembly receiving cavity 3411 and is connected to the second resilient member 345. The second elastic member 345 may be configured as a spring plate, a compression spring, a disc spring, or the like, which is disposed between the inner end of the locking tongue 343 and the middle plate of the 匚 type plate, and normally drives the locking tongue 343 to extend outward to the extended position. It should be noted 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 are communicated with 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. As an example, the first fitting hole 3432 and the second fitting hole 3431 together form a hole with a "convex" shape, wherein a protruding portion of the hole with the "convex" shape is the first fitting hole 3432, and the remaining portion of the "convex" shape is the second fitting hole 3431. Obviously, in the width direction of the latch 343, the size of the first fitting hole 3432 is smaller than the size of the second fitting hole 3431. Of course, in other examples, the first and second fitting holes 3432 and 3431 may be also configured as an "L" shaped hole structure, which is not limited thereto.

A limiting rod 342 is further installed in the assembly accommodating cavity 3411, the limiting rod 342 can move in the depth direction (the same direction as the axial direction of the plugging housing) of the plugging slot 210 in the rod moving hole, one end of the limiting rod 342 extends out of the rod moving hole to protrude out of the top plate of the 匚 type plate, and the other end of the limiting rod 342 is connected with the third elastic piece 344. The third elastic member 344 may be configured as a spring plate, a compression spring, or a disc spring. The two ends of the third elastic piece 344 are respectively connected with the seat body 341 and the limiting rod 342, and the third elastic piece 344 drives the limiting rod 342 to move to the limiting position towards the outside of the inserting groove 210.

In the insertion direction of the insertion groove 210, the limit rod 342 has a variable diameter structure, and specifically includes a small diameter portion 3421 and a large diameter portion 3422 that are sequentially disposed, where the outer diameter of the large diameter portion 3422 is greater than the outer diameter of the small diameter portion 3421. It should be noted that the outer diameter of the large diameter portion 3422 is larger than the width of the first fitting hole 3432, so that the large diameter portion 3422 cannot extend into the first fitting hole 3432. The small diameter portion 3421 has an outer diameter dimension equal to or smaller than a width dimension of the first fitting hole 3432 so as to be able to extend into the first fitting hole 3432.

In this way, during the process of mating the plug core 120 with the mating groove 210, the plug core 120 and the mating groove 210 are close to each other, and the limiting rod 342 is at the limiting position, i.e. the large diameter portion 3422 extends into the second mating hole 3431. One end of the stopper rod 342 first contacts the upper end surface of the plug core 120. In this process, the socket 200 integrally pushes the plug core 120 to move to the stroke end position in the receiving groove 111. Meanwhile, the plug core 120 reversely pushes the limit rod 342 to move toward the trigger position against the elastic potential energy of the third elastic member 344 until the large diameter portion 3422 of the limit rod 342 is separated from the second fitting hole 3431 in the insertion direction of the insertion slot, and the small diameter portion 3421 enters into the second fitting hole 3431. Under the action of the second elastic member 345, the locking tongue 343 extends to an extended position, and the small diameter portion 3421 is snapped into the first mating hole 3432.

It can be seen that, in this embodiment, the control of the lock tongue 343 can be achieved through the mechanical structures such as the first mating hole 3432, the second mating hole 3431, the limiting rod 342, the second elastic member 345, the third elastic member 344, and the like, and the above structure can naturally complete the extension of the lock tongue 343 when the charging plug 100 and the socket 200 are in plug-in mating, so that no additional operation of a worker is required, and the reliability is high.

It should be noted that the large diameter portion 3422 and the small diameter portion 3421 may be connected by a tapered surface, or a step may be formed at the joint of the two. Wherein, a step is formed at the joint of the two parts, which is favorable for the large diameter part 3422 to be quickly separated from the second matching hole 3431, and the small diameter part 3421 to be quickly entered into the first matching hole 3432, so as to improve the position switching rate of the lock tongue 343.

Of course, it is understood that when the charging plug and the socket 200 are separated, the locking tongue 343 may be pushed back to the retracted position by using a tool such as a dial.

In addition, in order to prevent the limit rod 342 from being completely retracted into the rod moving hole, the other end of the limit rod 342 forms a cap portion having an outer diameter larger than the diameter of the rod moving hole.

It should be noted that the third mating structure may also be disposed on the plug housing 110, and the corresponding fourth mating structure is disposed in the socket 210.

To ensure that the upper end surface of the plug core 120 can stably push the stopper rod 342, referring to fig. 10, in one embodiment, a boss 128 is provided protruding from an end surface of the plug core 120 facing away from the bottom wall of the receiving groove 111. The limiting rod 342 is adapted to abut against the boss 128 when the plug core 120 is in plug-in engagement with the plug slot 210.

The boss 128 may be integrally formed with the plug core 120 and may define a corresponding cavity therein to expand the volume of fluid flowing through the cavity. Alternatively, the boss 128 may be a U-shaped member fixedly coupled to the upper end surface of the plug core 120, and adhered to the upper end surface of the plug core 120.

Referring to fig. 13 and 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 disposed in the socket 210, and a fourth matching structure is disposed outside the standard dc charging interface 220 and spaced apart from each other.

Specifically, the geometric center of the bottom wall of the plugging slot 210 of the socket 200 is provided with a standard dc charging interface 220, the left and right sides of the standard dc charging interface 220 are respectively provided with a first expansion matching area 240a and a second expansion matching area 240b, the first expansion matching area 240a is matched with the first expansion area 125a of the charging plug, and the second expansion matching area 240b is matched with the second expansion matching area 240b and the second expansion area 125 b. At this time, the aforementioned fourth mating structure is disposed in the first extension area 125a or the second extension area 125b and is spaced apart from the standard dc charging interface 220.

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

Specifically, the connector assembly may include at least two of the fourth mating structures, for example, the fourth mating structures may be provided with 4, and the 4 are uniformly spaced along the circumferential direction of the standard dc charging interface 220. Correspondingly, the number of the third mating structures and bosses 128 on the plug housing 110 is also 4. Of course, the fourth mating structure may be 2 or 3 or more, which is not limited in this embodiment.

The foregoing is merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and all equivalent structural changes made by the present specification and drawings or direct/indirect application in other related technical fields are included in the scope of the present invention under the technical concept of the present invention.

Claims

1. The utility model provides a charging plug, its characterized in that, charging plug includes the plug body, the terminal surface of plug body is provided with a plurality of charging terminals and a plurality of fluid interface, the plug body still defines:

A fluid passage for connecting a cooling source;

a fluid flow-through cavity which is respectively communicated with the fluid channel and the fluid interface, wherein the fluid flow-through cavity is used for flowing heat exchange fluid from a cooling source, and the fluid interface is used for connecting a cooling circuit of external equipment; the charging plug comprises a plurality of charging terminals to be cooled, and a plurality of charging wire bundles, wherein the number of the charging wire bundles is consistent with that of the charging terminals to be cooled and the charging wire bundles are connected in a one-to-one correspondence manner; at least one of a portion of the charging terminal to be cooled and a portion of the charging harness is provided in the fluid flow-through cavity, and the other portion of the charging terminal to be cooled penetrates an end face of the plug body to be exposed from the plug body;

The body pressure relief channel is communicated with the fluid flow cavity and is configured to be opened and closed.

2. The charging plug according to claim 1, wherein the plug body comprises a plug housing and a plug inner core, an accommodating groove is formed in an end face of a first housing end in an axial direction of the plug housing, at least one housing pressure relief opening is formed in a groove wall of the accommodating groove, the plug housing defines the fluid passage communicated with the accommodating groove and a housing pressure relief passage communicated with the housing pressure relief opening therein, and the body pressure relief passage comprises the housing pressure relief passage;

The plug inner core is arranged in the accommodating groove in a movable mode along the axial direction of the plug outer shell, a plurality of charging terminals are arranged on one end face of the bottom wall of the accommodating groove, at least one inner core pressure relief opening is formed in the side wall, opposite to the outer shell pressure relief opening, of the plug inner core, the inner core pressure relief openings are consistent in number and correspond to the outer shell pressure relief openings one by one, a fluid flow cavity communicated with the inner core pressure relief openings is defined in the plug inner core, the fluid flow cavity is in sealing movable connection with the fluid channel, and the plug inner core is provided with communication positions enabling the inner core pressure relief openings to correspond to the outer shell pressure relief openings and to be opposite to each other.

3. The charging plug of claim 2, wherein the plug body further comprises a first resilient member disposed within the receiving slot; the two ends of the first elastic piece are respectively connected with the plug inner core and the plug outer shell, and the first elastic piece is used for always driving the plug inner core to be far away from the communication position.

4. A charging plug according to claim 3, wherein the communication position is a stroke end position in which the plug core is moved in the accommodation groove toward a groove bottom wall direction of the accommodation groove, and the first elastic member normally drives the plug core away from the communication position in a direction away from the groove bottom wall of the accommodation groove.

5. The charging plug of claim 4, wherein the housing pressure relief opening is provided in a slot side wall of the receiving slot, and at least one core pressure relief opening is provided in a position where a core outer peripheral wall of the plug core is engaged with the slot side wall of the receiving slot.

6. The charging plug of claim 4, wherein the charging plug further comprises:

The holding piece is fixedly arranged on the outer peripheral wall of the plug shell, a handle pressure relief opening is formed in the holding piece, a part, close to the first shell end, of the holding piece extends into the accommodating groove and is provided with the shell pressure relief opening, an intermediate pressure relief channel is defined in the holding piece, and the intermediate pressure relief channel is communicated with the shell pressure relief opening and the handle pressure relief opening;

The handle pressure relief opening is communicated with the shell pressure relief channel.

7. The charging plug according to claim 6, wherein a part of the surface of the outer peripheral wall of the inner core is recessed to form a handle chute, the handle chute extends to both axial ends of the plug inner core along the axial direction of the plug outer shell, and the wall of the handle chute is provided with the inner core pressure relief opening;

The portion of the grip member adjacent the first housing end extends into the receiving slot and forms a sliding portion that slidably fits within the handle chute.

8. The charging plug according to claim 7, wherein the sliding portion is folded and extended toward a bottom wall of the receiving groove; and/or the number of the groups of groups,

The groove side wall of the accommodating groove is provided with a matching area matched with the sliding part; the sliding part deviates from the side wall of one side of the matching area and is provided with the shell pressure relief opening, and the handle sliding chute is opposite to the side wall of one side of the matching area and is provided with the inner core pressure relief opening.

9. The charging plug of claim 6, wherein another portion of the charging terminal to be cooled extends through an end face of the plug core facing away from the bottom wall of the slot to be exposed from the plug core; another portion of the charging harness penetrates through an end face of the plug inner core toward a groove bottom wall of the accommodating groove to extend into the plug housing.

10. The charging plug of claim 9, wherein an end face of said plug core facing away from a bottom wall of said receiving recess includes a standard charging interface portion and an expansion region, said expansion region being provided with a plurality of said fluid interfaces communicating with said fluid flow-through cavity;

all the charging terminals to be cooled comprise a plurality of standard charging terminals, and at least part of the standard charging terminals are arranged at the standard charging interface part.

11. The charging plug of claim 10, further comprising a plurality of low voltage emergency power terminals, at least a portion of the low voltage emergency power terminals being disposed in the expansion zone.

12. The charging plug of claim 1, wherein the fluid flow-through chamber is separated into a first fluid flow-through chamber and a second fluid flow-through chamber by a partition; the plug body is internally provided with a pressure relief three-way channel, and the pressure relief channel of the plug body comprises the pressure relief three-way channel; the first end of the pressure relief three-way channel is communicated with the first fluid flow cavity, and the second end of the pressure relief three-way channel is communicated with the second fluid flow cavity;

The charging plug further comprises two pressure relief valves, one pressure relief valve is arranged at the first end, and the other pressure relief valve is arranged at the second end.

13. The charging plug of claim 2, wherein the fluid flow-through cavity is divided into a separate circuit connection cavity and a charging cooling cavity, the circuit connection cavity communicating with the fluid passage and the fluid port, respectively, the housing pressure relief passage communicating with the circuit connection cavity; at least one of a part of the charging terminal to be cooled and a part of the charging harness is arranged in the charging cooling cavity, and the charging cooling cavity is communicated with the fluid channel; and/or the number of the groups of groups,

The body pressure release channel is provided with a pressure release valve assembly, and the pressure release valve assembly is used for enabling the body pressure release channel to be opened and closed.

14. The charging plug according to any one of claims 6 to 11, wherein a device cavity is further defined within the plug housing of the plug body, the device cavity being disposed between the receiving groove of the plug body and the second housing end of the plug housing in the axial direction;

The charging plug further includes:

a plurality of detection elements, the detection elements being disposed within a plug core of the plug body or within the plug housing;

The control module is arranged in the device cavity, is respectively in communication connection with each detection element, and is provided with a plurality of status indicator lamps;

The operating piece is arranged on the peripheral wall of the plug shell, and part of the operating piece penetrates through the side wall of the plug shell and extends into the device cavity to be connected with the control module; the operation piece comprises a touch screen and/or a control button;

The plug comprises a plug shell, a device cavity, a plurality of through holes, a plurality of status indicator lamps, a plurality of display devices and a plurality of display devices, wherein the plurality of through holes are formed in the peripheral wall of the plug shell and are communicated with the device cavity, the number of the plurality of through holes is consistent with that of the plurality of status indicator lamps and corresponds to that of the status indicator lamps one by one, so that the status indicator lamps extend into the corresponding through holes and are exposed from the corresponding through holes.

15. The charging plug of claim 14, wherein one end of the body relief passage extends into communication with an end face of the second housing end and the other end of the body relief passage communicates with the device cavity;

The part of the holding piece close to the second shell end penetrates through the peripheral wall of the plug shell to extend into the device cavity, and a handle pressure relief opening is formed in the end face of the part of the holding piece close to the second shell end;

The charging plug further comprises a connecting pipe, the connecting pipe is arranged in the device cavity, and the handle pressure relief opening is communicated with the body pressure relief channel through the connecting pipe.

16. The charging plug according to claim 2, wherein a bottom wall of the accommodating groove is provided with a passage opening communicating with the fluid passage;

the charging plug further comprises a pipe joint, the pipe joint is convexly arranged on the end face of one end of the plug inner core, which faces the bottom wall of the tank, the pipe joint is communicated with the fluid flow cavity, the pipe joint comprises a plurality of conical parts which are sequentially connected along the protruding direction of the pipe joint, and the outer diameter of each conical part is gradually reduced in the protruding direction;

Wherein the tube fitting is adapted to be inserted into the fluid passage from the passage opening and the tapered portion is in interference fit with the fluid passage and is relatively movable to allow the fluid flow through chamber to be in sealing movable communication with the fluid passage.

17. The charging plug according to claim 3, wherein the first elastic member includes a compression spring provided between an end face of the plug inner core toward the tank bottom wall and the tank bottom wall of the accommodation tank; and/or the number of the groups of groups,

The first elastic piece is provided with a plurality of.

18. A charging gun, comprising:

a charging plug according to any one of claims 1 to 17;

and the conducting wire in the charging cable is electrically connected with the charging terminal of the charging plug.

19. The charging gun of claim 18, wherein a pressure relief return channel is defined in the charging cable that extends in a routing direction of the charging cable, the housing pressure relief channel of the charging plug being in communication with the pressure relief return channel.

20. A joint assembly, comprising:

a charging plug according to any one of claims 1 to 17; and

And the socket is suitable for being in plug-in fit with a charging terminal of the charging plug.

21. The connector assembly of claim 20, wherein the receptacle is adapted to extend into the receiving slot of the charging plug and mate with the charging terminal.

22. The connector assembly of claim 20, wherein the connector assembly further comprises:

The first matching structure is arranged on the radial outer side of the socket, the second matching structure is arranged on the outer peripheral wall of the plug outer shell of the plug body, and the first matching structure and the second matching structure can be matched in a separable manner;

the third matching structure is arranged at the plugging groove of the socket, the fourth matching structure is arranged at the containing groove of the plug shell of the plug body, and the third matching structure and the fourth matching structure are detachably matched.

23. The connector assembly of claim 22, wherein the first mating structure is configured as a snap-fit hook fixedly disposed on an outer peripheral wall of the receptacle;

The second mating structure is configured as a clasp rotatably coupled to the peripheral wall of the plug housing, the clasp adapted to be hooked to the clasp.

24. The connector assembly of claim 22 or 23, wherein the fourth mating structure is configured as a locking hole opening into the outer peripheral wall of the plug housing, and wherein the locking hole communicates with the receiving slot;

The third mating structure includes:

The lock tongue is arranged in the inserting groove of the socket and is configured to be movable between an extending position and an avoiding position, the lock tongue is suitable for extending into the lock hole in the extending position, and the lock tongue is avoided from the plug shell in the avoiding position;

The position switching assembly is arranged in the inserting groove and is suitable for driving the lock tongue to move from the avoiding position to the extending position when the plug inner core of the charging plug is inserted into the inserting groove.

25. The connector assembly of claim 24, wherein the locking tongue includes a first mating hole and a second mating hole which are sequentially opened and communicate with each other in a direction from a radially inner side to a radially outer side of the insertion groove, and a size of the first mating hole is smaller than a size of the second mating hole in a width direction of the locking tongue;

the position switching assembly includes:

The socket body is arranged in the plug-in groove, a rod moving hole is formed in the side wall of one side of the socket body, facing the opening of the plug-in groove, a lock tongue moving hole is further formed in the socket body, when the plug inner core is in plug-in fit with the plug-in groove, the lock tongue moving hole and the lock hole are opposite to each other, and an assembly accommodating cavity which is respectively communicated with the rod moving hole and the lock tongue moving hole is further defined in the socket body; wherein, the lock tongue is slidably assembled in the lock tongue moving hole;

The limiting rod is movably arranged in the rod movable hole along the depth direction of the inserting groove, one end of the limiting rod extends out of the rod movable hole to protrude out of one side wall of the seat body, which faces the opening of the inserting groove, the limiting rod comprises a small-diameter part and a large-diameter part which are sequentially arranged in the inserting direction of the inserting groove, the outer diameter of the large-diameter part is larger than that of the small-diameter part, the limiting rod is provided with a limiting position and a triggering position, the large-diameter part is matched with the second matching hole in the limiting position, and the small-diameter part is matched with the first matching hole in the triggering position;

The second elastic piece is arranged in the assembly accommodating cavity, two ends of the second elastic piece are respectively connected with the seat body and the lock tongue, and the second elastic piece normally drives the lock tongue to move towards the extending position;

The third elastic piece is arranged in the assembly accommodating cavity, two ends of the third elastic piece are respectively connected with the seat body and the limiting rod, and the limiting rod is driven to move towards the triggering position by the third elastic piece.

26. The joint assembly of claim 22, wherein, a standard direct current charging interface is arranged in the plug-in groove of the socket, the connector assembly comprises at least two fourth matching structures, wherein the fourth matching structures are arranged on the outer side of the standard direct current charging interface and are spaced apart from each other.