Composite connection gun, composite connection socket and charging device applied to charging device

Abstract

Disclosed are a composite connection gun applied to a charging device, a composite connection socket and the charging device. The composite connection gun is used for plug-in connection with the composite connection socket arranged on a vehicle. The composite connection gun comprises a plug-in end, the plug-in end comprising a liquid supply plug, a liquid return plug and a charging plug, the liquid supply plug and the liquid return plug being connected with a liquid cooling unit through a pipeline; the charging plug is used for connecting a power module of the charging device. The plug-in end further comprises a first connection confirmation terminal and a second connection confirmation terminal, one end of the first connection confirmation terminal being used for connecting a first connection confirmation socket of the composite connection socket, the other end of the first connection confirmation terminal being connected with a first connection confirmation circuit; one end of the second connection confirmation terminal is used for connecting a second connection confirmation socket of the composite connection socket, the other end of the second connection confirmation terminal being connected with a second connection confirmation circuit. The liquid cooling unit can be used to improve the heat dissipation capacity of a battery management system for a vehicle power battery, so as to meet the heat dissipation requirement of battery overcharging.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more particularly to a composite connector gun, composite connector socket, and charging device for use in charging equipment. Background Technology

[0002] There are two main ways to replenish energy for electric vehicles: charging and battery swapping. Charging is limited by the charging speed of the power battery, generally requiring 1-2 hours to fully charge, which cannot meet the fast charging needs of electric vehicles. Therefore, battery swapping has gained favor in some passenger cars and heavy trucks. Currently, electric vehicle battery swapping stations primarily serve only a single brand or a few specific models, limiting the number of vehicles served and the target user group. Furthermore, the construction and investment costs of battery swapping stations are relatively high, making it difficult to generate operational revenue, and resulting in high operating costs for users.

[0003] With breakthroughs in high-rate battery technology (3C and above), high-rate supercharging of lithium batteries has become possible, significantly improving charging speed. However, high-rate supercharging places higher demands on the battery management system (BMS). The BMS needs to dissipate heat rapidly during supercharging. Improving the vehicle's BMS's heat dissipation capabilities is costly, and such improvements are only effective during charging, becoming redundant in other operating conditions. This not only increases the vehicle's weight but also leads to higher energy consumption. Summary of the Invention

[0004] This application provides a composite connector gun, a composite connector socket, and a charging device for use in charging equipment, to improve the heat dissipation capacity of the battery during overcharging of the vehicle battery.

[0005] Firstly, this application provides an under-vehicle connection gun for connecting to an on-vehicle connection socket installed on a vehicle. The under-vehicle connection gun includes a plug-in end for plugging into the on-vehicle connection socket along a plugging direction. The plug-in end includes a supply plug and a return plug, which are connected to a liquid cooling unit via pipes, wherein the liquid cooling unit includes coolant. The plug-in end also includes a first connection confirmation terminal, one end of which is connected to a first connection confirmation socket of the on-vehicle connection socket, and the other end of which is connected to a first connection confirmation circuit. When the first connection confirmation terminal is connected to the first connection confirmation socket, the first connection confirmation circuit and the connection confirmation circuit connected to the first connection confirmation socket form a first connection confirmation loop, which is used to confirm the connection status of the supply plug and the return plug with the on-vehicle connection socket.

[0006] In the technical solution provided in this application, when the under-vehicle connection gun and the on-vehicle connection socket are plugged in, the coolant lines of the liquid cooling unit and the battery management system can be connected. When the first connection confirmation terminal of the under-vehicle connection gun is connected to the first connection confirmation socket of the on-vehicle connection socket, coolant can be transferred between the coolant lines of the liquid cooling unit and the battery management system. The liquid cooling unit can assist the battery management system in dissipating heat from the vehicle's power battery, thereby utilizing the under-vehicle liquid cooling unit to improve the heat dissipation capacity of the on-vehicle battery management system for the vehicle's power battery, meeting the heat dissipation requirements for battery overcharging. Using the under-vehicle connection gun provided in this application, the heat dissipation requirements for vehicle battery overcharging can be met without upgrading or modifying the vehicle's battery management system, or with only a minor upgrade or modification. This reduces the cost of upgrading or modifying the vehicle's battery management system, largely avoids resource waste caused by upgrading or modifying the vehicle's battery management system when the battery is not charging, and hardly increases the overall weight of the vehicle or its energy consumption.

[0007] In one specific implementation, the liquid supply plug includes a sleeve and a piston tube, which are sleeved together in the insertion direction. The piston tube is a hollow tubular structure with an opening at its first end and a closed second end. The first end of the piston tube is used to connect to a vehicle-mounted connector. The side wall of the piston tube near the second end includes a through hole for connecting the pipeline and the piston tube. The piston tube and the sleeve are movable relative to each other in the insertion direction. When the lower-side connector is not connected to the vehicle-mounted connector, the sleeve closes the through hole, thereby sealing the passage between the pipeline and the piston tube. When the lower-side connector is connected to the vehicle-mounted connector, the sleeve avoids the through hole, thereby connecting the pipeline and the piston tube.

[0008] In one specific implementation, the undercarriage connector further includes a first housing. The first housing includes a first end along the insertion direction. The first end of the first housing is used to connect to the vehicle-mounted connector socket. A liquid supply plug and a liquid return plug are respectively disposed at the first end of the first housing. The first end of the first housing includes a first positioning through hole, and a locking part is included in the first positioning through hole. When the undercarriage connector and the vehicle-mounted connector socket are inserted, the locking part extends from the first positioning through hole into the vehicle-mounted connector socket in the vertical direction along the insertion direction to lock the relative position of the undercarriage connector and the vehicle-mounted connector socket.

[0009] In one specific implementation, the undercarriage connection gun further includes an assist handle structure, which includes a grip, a first connecting part, and a second connecting part. The first connecting part and the second connecting part are respectively connected to both ends of the grip, and the first connecting part and the second connecting part are respectively connected to the two vertically opposite sides of the undercarriage connection gun along the insertion direction.

[0010] In one specific implementation scheme, the vehicle is provided with a plug-in auxiliary structure, which includes a tow frame extending and movable along the plug-in direction. One end of the tow frame is movably connected to the vehicle, and the other end of the tow frame is provided with an abutment portion. The outer wall of the undercarriage connector includes a protrusion that protrudes near the plug-in end of the undercarriage connector along the plug-in direction. Along the plug-in direction, the projection of the protrusion at least partially overlaps with the projection of the abutment portion. When the undercarriage connector is connected to the vehicle-mounted connector socket and the undercarriage connector is in a first position, the tow frame pulls the undercarriage connector from the first position to a second position so that the undercarriage connector is fully connected to the vehicle-mounted connector socket.

[0011] In one specific implementation, the undercarriage connector further includes a signal trigger terminal, which is disposed at the plug end of the undercarriage connector. When the undercarriage connector is in the first position, the signal trigger terminal is electrically connected to the signal trigger terminal of the on-board connector. In response to the electrical connection between the signal trigger terminal and the signal trigger terminal of the on-board connector, the towing frame pulls the undercarriage connector from the first position to the second position so that the undercarriage connector is successfully connected to the on-board connector.

[0012] In one specific implementation, the first connection confirmation terminal and the signal trigger terminal are located between the liquid supply plug and the liquid return plug respectively in the vertical direction of the insertion direction; the first connection confirmation terminal and the signal trigger terminal are spaced apart in the vertical direction of the insertion direction.

[0013] In one specific implementation, the length of the first connection confirmation terminal protruding from the plug end of the under-vehicle connection gun in the plugging direction is L3, and the length of the signal trigger terminal protruding from the plug end of the under-vehicle connection gun in the plugging direction is L2, where L3 < L2; when the under-vehicle connection gun is in the first position, the signal trigger terminal is electrically connected to the signal trigger terminal of the on-vehicle connection socket; when the under-vehicle connection gun is in the second position, the first connection confirmation terminal is electrically connected to the connection confirmation terminal of the on-vehicle connection socket.

[0014] Secondly, this application provides an on-vehicle connection socket for connecting to an off-vehicle connection gun. The on-vehicle connection socket includes a plug-in end for plugging into the off-vehicle connection gun along a plugging direction. The plug-in end includes an inlet socket and an outlet socket, which are connected to the coolant lines of the vehicle's battery management system via pipes, wherein the coolant lines of the battery management system include coolant. The plug-in end also includes a first connection confirmation socket, one end of which is connected to a first connection confirmation terminal of the off-vehicle connection gun, and the other end of which is connected to a third connection confirmation circuit. When the first connection confirmation terminal is connected to the first connection confirmation socket, the third connection confirmation circuit and the connection confirmation circuit connected to the first connection confirmation terminal form a first connection confirmation loop, which is used to confirm the connection status of the inlet and outlet sockets with the off-vehicle connection gun.

[0015] In the technical solution provided in this application, when the under-vehicle connection gun and the on-vehicle connection socket are plugged in, the coolant lines of the liquid cooling unit and the battery management system can be connected. When the first connection confirmation terminal of the under-vehicle connection gun is connected to the first connection confirmation socket of the on-vehicle connection socket, coolant can be transferred between the coolant lines of the liquid cooling unit and the battery management system. The liquid cooling unit can assist the battery management system in dissipating heat from the vehicle's power battery, thereby utilizing the under-vehicle liquid cooling unit to improve the heat dissipation capacity of the on-vehicle battery management system for the vehicle's power battery, meeting the heat dissipation requirements for battery overcharging. Using the on-vehicle connection socket provided in this application, the heat dissipation requirements for vehicle battery overcharging can be met without upgrading or modifying the vehicle's battery management system, or with only a minor upgrade or modification. This reduces the cost of upgrading or modifying the vehicle's battery management system, largely avoids resource waste when the battery is not charging, and hardly increases the overall weight of the vehicle or its energy consumption.

[0016] In one specific implementation, the liquid inlet socket includes a sleeve and a piston tube, which are sleeved together in the insertion direction. The piston tube is a hollow tubular structure with an opening at its first end and a closed second end. The first end of the piston tube is used to connect to the under-vehicle connecting gun, and the side wall of the piston tube near the second end includes a through hole for connecting the pipeline and the piston tube. The piston tube and the sleeve can move relative to each other in the insertion direction. When the under-vehicle connecting gun is not connected to the vehicle-mounted connecting socket, the sleeve closes the through hole, thereby sealing the passage between the pipeline and the piston tube. When the under-vehicle connecting gun is connected to the vehicle-mounted connecting socket, the sleeve avoids the through hole, thereby connecting the pipeline and the piston tube.

[0017] In one specific implementation, the vehicle-mounted connector further includes a second housing. The second housing includes a first end along the insertion direction. The first end of the second housing is used to connect the vehicle-mounted connector gun. An inlet socket and an outlet socket are respectively disposed at the first end of the second housing. The first end of the second housing includes a second positioning through hole, and a locking part is included in the second positioning through hole. When the vehicle-mounted connector gun and the vehicle-mounted connector are inserted, the locking part extends from the second positioning through hole into the vehicle-mounted connector gun in the vertical direction along the insertion direction to lock the relative position of the vehicle-mounted connector gun and the vehicle-mounted connector gun.

[0018] Thirdly, this application provides a liquid cooling device, including a liquid cooling unit and an under-vehicle connection gun as described in any of the possible embodiments of the first aspect above; the under-vehicle connection gun is used to connect to an on-vehicle connection socket, and the supply plug and return plug are connected to the liquid cooling unit through pipelines. After the supply plug and return plug are successfully connected to the on-vehicle connection socket, the liquid cooling unit is used to output coolant to the vehicle's battery management system through the supply plug to dissipate heat from the vehicle's battery, and the liquid cooling unit is used to receive the coolant output by the battery management system through the return plug.

[0019] In one specific implementation, the liquid cooling unit includes a heat exchanger, a coolant tank, and a water pump. A supply plug and a return plug are connected to at least one of the heat exchanger and the coolant tank via pipelines, wherein: the coolant tank is used to contain coolant; the heat exchanger is used to receive coolant transmitted through the pipelines by the return plug; and the water pump is used to drive the coolant to flow between the supply plug, the return plug, the heat exchanger, and the coolant tank.

[0020] Fourthly, this application provides a composite connection gun for use in charging equipment, which is used to connect to a composite connection socket installed in a vehicle. The composite connection gun includes a plug-in end for plugging into the composite connection socket along the plugging direction. The plug-in end includes a supply plug, a return plug, and a charging plug. The supply plug and return plug are connected to a liquid cooling unit via pipes, wherein the liquid cooling unit includes coolant. One end of the charging plug is used to connect to the power module of the charging equipment, and the other end is used to output DC power. The plug-in end also includes a first connection confirmation terminal and a second connection confirmation terminal. One end of the first connection confirmation terminal is used to connect to a first connection confirmation socket of the composite connection socket, and the other end is used to connect to a first connection confirmation circuit. One end of the second connection confirmation terminal is used to connect to a second connection confirmation socket of the composite connection socket, and the other end is used to connect to a second connection confirmation circuit. When the first connection confirmation terminal is connected to the first connection confirmation socket, the first connection confirmation circuit and the connection confirmation circuit connected to the first connection confirmation socket form a first connection confirmation loop, which is used to confirm the connection status of the supply plug and return plug with the composite connection socket. When the second connection confirmation terminal is connected to the second connection confirmation socket, the second connection confirmation circuit and the connection confirmation circuit connected to the second connection confirmation socket form a second connection confirmation loop. The second connection confirmation loop is used to confirm the connection status between the charging plug and the composite connection socket. The length of the second connection confirmation terminal protruding from the plug end of the composite connection gun in the plugging direction is L1, and the length of the first connection confirmation terminal protruding from the plug end of the composite connection gun in the plugging direction is L3, where L1 ≤ L3.

[0021] In the technical solution provided in this application, when the composite connector gun and composite connector socket are plugged in, they can connect the coolant lines of the liquid cooling unit and the battery management system, and can also connect the charging equipment and the vehicle's battery. This ensures that coolant is supplied before power is supplied. When the first connection confirmation terminal of the under-vehicle connector gun is connected to the first connection confirmation socket of the on-vehicle connector socket, coolant can be transferred between the coolant lines of the liquid cooling unit and the battery management system. The liquid cooling unit can assist the battery management system in dissipating heat from the vehicle's power battery, thereby utilizing the under-vehicle liquid cooling unit to enhance the heat dissipation capacity of the on-vehicle battery management system for the vehicle's power battery, meeting the heat dissipation requirements for overcharging. Using the composite connector gun provided in this application, the heat dissipation requirements for overcharging the vehicle battery can be met without upgrading or modifying the vehicle's battery management system, or with only minor upgrades. This reduces the cost of upgrading the vehicle's battery management system, largely avoids resource waste when the battery is not charging, and hardly increases the vehicle's overall weight or energy consumption.

[0022] In one specific implementation, the liquid supply plug includes a sleeve and a piston tube, which are sleeved together in the insertion direction. The piston tube is a hollow tubular structure with an opening at its first end and a closed second end. The first end of the piston tube is used to connect to a composite connection socket. The side wall of the piston tube near the second end includes a through hole for connecting the pipeline and the piston tube. The piston tube and the sleeve are movable relative to each other in the insertion direction. When the composite connection gun is not connected to the composite connection socket, the sleeve closes the through hole, thereby closing the channel between the pipeline and the piston tube. When the composite connection gun is connected to the composite connection socket, the sleeve avoids the through hole, thereby connecting the pipeline and the piston tube.

[0023] In one specific implementation, the composite connector gun further includes a first housing, which includes a first end along the insertion direction. The first end of the first housing is used to connect to the composite connector socket. A liquid supply plug and a liquid return plug are respectively disposed at the first end of the first housing. The first end of the first housing includes a first positioning through hole, and a locking part is included in the first positioning through hole. When the composite connector gun and the composite connector socket are inserted, the locking part extends from the first positioning through hole into the composite connector socket in the vertical direction along the insertion direction to lock the relative position of the composite connector gun and the composite connector socket.

[0024] In one specific implementation, the composite connector gun further includes an assist handle structure, which includes a grip, a first connecting part, and a second connecting part. The first connecting part and the second connecting part are respectively connected to both ends of the grip, and the first connecting part and the second connecting part are respectively connected to the two vertically opposite sides of the composite connector gun along the insertion direction.

[0025] In one specific implementation scheme, the vehicle is provided with a plug-in auxiliary structure, which includes a tow frame extending and movable along the plug-in direction. One end of the tow frame is movably connected to the vehicle, and the other end of the tow frame is provided with an abutment portion. The outer wall of the composite connector gun includes a protrusion that protrudes along the plug-in direction and is located near the plug-in end of the composite connector gun. Along the plug-in direction, the projection of the protrusion and the projection of the abutment portion at least partially overlap. When the composite connector gun is connected to the composite connector socket and the composite connector gun is in a first position, the tow frame pulls the composite connector gun from the first position to a second position so that the composite connector gun is fully connected to the composite connector socket.

[0026] In one specific implementation, the composite connector gun further includes a signal trigger terminal disposed at the plug end of the composite connector gun. When the composite connector gun is in the first position, the signal trigger terminal is electrically connected to the signal trigger terminal of the composite connector socket. In response to the electrical connection between the signal trigger terminal and the signal trigger terminal of the composite connector socket, the traction frame pulls the composite connector gun from the first position to the second position so that the composite connector gun and the composite connector socket are successfully connected.

[0027] In one specific implementation scheme, the first connection confirmation terminal, the second connection confirmation terminal, and the signal trigger terminal are respectively located between the liquid supply plug and the liquid return plug in the vertical direction of the insertion direction; the first connection confirmation terminal, the second connection confirmation terminal, and the signal trigger terminal are spaced apart in the vertical direction of the insertion direction.

[0028] In one specific implementation, the length of the signal trigger terminal exposed by the plug end of the composite connector gun in the plugging direction is L2, and L3 < L2; when the composite connector gun is in the first position, the signal trigger terminal is electrically connected to the signal trigger terminal of the composite connector socket; when the composite connector gun is in the second position, the first connection confirmation terminal is electrically connected to the connection confirmation terminal of the composite connector socket.

[0029] In one specific feasible implementation, a cooling pool is provided inside the composite connector gun. The cooling pool is in thermal contact with the charging plug. The cooling pool includes a liquid inlet and a liquid outlet, which are connected to a liquid cooling unit.

[0030] In one specific implementation, the plug end of the composite connector gun also includes an auxiliary power plug, one end of which is used to connect to the auxiliary power socket of the composite connector socket, and the other end of which is used to connect to the low-voltage auxiliary power supply of the charging device.

[0031] In one specific implementation, the connector of the composite connector gun further includes a communication plug, one end of which is used to connect to the communication socket of the composite connector socket, and the other end of which is used to connect to the controller of the charging device.

[0032] Fifthly, this application provides a composite connection socket for connecting to a composite connection gun outside of a vehicle. The composite connection socket includes a plug-in end for plugging into the composite connection gun along the plug-in direction. The plug-in end includes an inlet socket, an outlet socket, and a charging socket. The inlet and outlet sockets are connected to the coolant lines of the vehicle's battery management system via pipes. One end of the charging socket is used to connect to the vehicle's battery, and the other end is used to input DC power. The plug-in end also includes a first connection confirmation socket and a second connection confirmation socket. One end of the first connection confirmation socket is used to connect to a first connection confirmation terminal of the composite connection gun, and the other end is used to connect to a third connection confirmation circuit. One end of the second connection confirmation socket is used to connect to a second connection confirmation terminal of the composite connection gun, and the other end is used to connect to a fourth connection confirmation circuit. When the first connection confirmation terminal is connected to the first connection confirmation socket, the third connection confirmation circuit and the connection confirmation circuit connected to the first connection confirmation terminal form a first connection confirmation loop. The first connection confirmation loop is used to confirm the connection status of the inlet and outlet sockets with the composite connection gun. When the second connection confirmation terminal is connected to the second connection confirmation socket, the fourth connection confirmation circuit and the connection confirmation circuit connected to the second connection confirmation terminal form a second connection confirmation loop. The second connection confirmation loop is used to confirm the connection status between the charging socket and the composite connection gun. The length of the second connection confirmation socket exposing the plug end of the composite connection socket in the plugging direction is L1, and the length of the first connection confirmation socket exposing the plug end of the composite connection socket in the plugging direction is L3, where L1 ≤ L3.

[0033] In the technical solution provided in this application, when the composite connector gun and composite connector socket are plugged in, they can connect the coolant lines of the liquid cooling unit and the battery management system, and can also connect the charging equipment and the vehicle's battery. This ensures that coolant is supplied before power is supplied. When the first connection confirmation terminal of the under-vehicle connector gun is connected to the first connection confirmation socket of the on-vehicle connector socket, coolant can be transferred between the coolant lines of the liquid cooling unit and the battery management system. The liquid cooling unit can assist the battery management system in dissipating heat from the vehicle's power battery, thereby utilizing the under-vehicle liquid cooling unit to enhance the heat dissipation capacity of the on-vehicle battery management system for the vehicle's power battery, meeting the heat dissipation requirements for overcharging. Using the composite connector socket provided in this application, the heat dissipation requirements for overcharging the vehicle battery can be met without upgrading or modifying the vehicle's battery management system, or with only minor upgrades. This reduces the cost of upgrading the vehicle's battery management system, largely avoids resource waste when the battery is not charging, and hardly increases the vehicle's overall weight or energy consumption.

[0034] In one specific implementation, the liquid inlet socket includes a sleeve and a piston tube, which are sleeved together in the insertion direction. The piston tube is a hollow tubular structure with an opening at its first end and a closed second end. The first end of the piston tube is used to connect to a composite connection gun, and the side wall of the piston tube near the second end includes a through hole for connecting the pipeline and the piston tube. The piston tube and the sleeve are movable relative to each other in the insertion direction. When the composite connection socket is not connected to the composite connection gun, the sleeve closes the through hole, thereby closing the channel between the pipeline and the piston tube. When the composite connection socket is connected to the composite connection gun, the sleeve avoids the through hole, thereby connecting the pipeline and the piston tube.

[0035] In one specific implementation, the composite connector further includes a second housing. The second housing includes a first end along the insertion direction. The first end of the second housing is used to connect the composite connector gun. An inlet socket and an outlet socket are respectively disposed at the first end of the second housing. The first end of the second housing includes a second positioning through hole, and a locking part is included in the second positioning through hole. When the composite connector gun and the composite connector are inserted, the locking part extends from the second positioning through hole into the composite connector gun in the vertical direction along the insertion direction to lock the relative position of the composite connector gun and the composite connector.

[0036] In one specific implementation, the plug end of the composite connector also includes an auxiliary power socket, one end of which is used to connect to the auxiliary power plug of the composite connector gun, and the other end of which is used to connect to the vehicle's battery management system.

[0037] In one specific implementation, the plug end of the composite connector also includes a communication socket, one end of which is used to connect to the communication plug of the composite connector gun, and the other end of which is used to connect to the vehicle's battery management system.

[0038] Sixthly, this application provides a charging device, including a power module, a liquid cooling unit, and a composite connector gun as described in any of the possible embodiments of the fourth aspect above. The composite connector gun is used to connect to a composite connector socket of a vehicle. A charging plug is connected to the power module, and a liquid supply plug and a liquid return plug are connected to the liquid cooling unit via pipelines. After the charging plug, liquid supply plug, and liquid return plug are successfully connected to the composite connector socket, the power module is used to output DC power to the vehicle's battery through the charging plug to charge the battery, the liquid cooling unit is used to output coolant to the vehicle's battery management system through the liquid supply plug to dissipate heat from the battery, and the liquid cooling unit is used to receive coolant output from the battery management system through the liquid return plug.

[0039] In one specific implementation, the liquid cooling unit includes a heat exchanger, a coolant tank, and a water pump. A supply plug and a return plug are connected to at least one of the heat exchanger and the coolant tank via pipelines, wherein: the coolant tank is used to contain coolant; the heat exchanger is used to receive coolant transmitted through the pipelines by the return plug; and the water pump is used to drive the coolant to flow between the supply plug, the return plug, the heat exchanger, and the coolant tank. Attached Figure Description

[0040] Figure 1 A schematic diagram illustrating the application of the connecting device provided in this application;

[0041] Figure 2 A schematic diagram of the connecting device provided in this application;

[0042] Figure 3 This is a schematic diagram of the structure of the under-vehicle connecting gun provided in this application;

[0043] Figure 4 A structural schematic diagram of the vehicle-mounted connection socket provided in this application;

[0044] Figure 5 A partial structural schematic diagram of the liquid supply plug for the under-vehicle connecting gun provided in this application;

[0045] Figure 6 This is a structural schematic diagram of the under-vehicle connecting gun provided in this application;

[0046] Figure 7 A schematic diagram of the terminals of the under-vehicle connection gun provided in this application and the corresponding sockets of the on-vehicle connection sockets;

[0047] Figure 8 Another structural schematic diagram of the under-vehicle connecting gun provided in this application;

[0048] Figure 9 Another structural diagram of the vehicle connection socket provided in this application.

[0049] Figure label:

[0050] 1-Vehicle; 2-Liquid cooling unit; 3-Connecting device; 4-Charging pile;

[0051] 100 - Under-vehicle connection gun; 200 - On-vehicle connection socket; 300 - Locking part; 400 - Power steering handle structure;

[0052] 500-Plug-in auxiliary structure;

[0053] 101-First housing; 102-First connection confirmation terminal; 103-Supply plug; 104-Return plug;

[0054] 105 - First positioning through hole; 106 - Signal trigger terminal; 107 - Charging plug; 108 - Second connection confirmation terminal;

[0055] 109 - Protrusion;

[0056] 201 - Second housing; 202 - First connection confirmation socket; 203 - Liquid inlet socket; 204 - Liquid outlet socket;

[0057] 205 - Second positioning through hole; 206 - Signal trigger socket; 207 - Charging socket; 208 - Second connection confirmation socket;

[0058] 401-First connecting part; 402-Second connecting part; 403-Holding part; 501-Traction frame;

[0059] 502 - Abutment part; 1031 - Sleeve; 1032 - Piston tube; 1033 - Through hole. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The terms expressing position and direction described in the embodiments of this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of the embodiments of this application are only for illustrating relative positional relationships and do not represent actual scale.

[0061] Specific details are set forth in the following description to aid in understanding this application; however, embodiments of this application can be implemented in various ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the embodiments of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0062] To facilitate understanding, the application scenarios of the under-vehicle connection gun and on-vehicle connection socket involved in this application will be explained first. The under-vehicle connection gun provided in this application embodiment can be adapted with the on-vehicle connection socket provided in this application embodiment to form a connection device. This connection device can be applied to vehicles, such as electric cars, electric heavy trucks, and other electric vehicles, or hybrid vehicles. This connection device can connect the liquid cooling unit under the vehicle (outside the vehicle) to the coolant pipeline of the battery management system (BMS) on the vehicle (on the vehicle) during vehicle charging, realizing the transfer of coolant between the liquid cooling unit and the battery management system, thereby improving the heat exchange capacity of the battery management system for the vehicle's battery. This connection device can also electrically connect charging equipment such as charging piles to the vehicle's battery (or battery pack), realizing the transfer of electrical energy between the charging equipment and the vehicle's battery, thereby realizing the charging of the vehicle's battery. When the connection device can transfer both coolant and electrical energy, the under-vehicle connection gun can also be called a composite connection gun, and correspondingly, the on-vehicle connection socket can also be called a composite connection socket. It is understood that the under-vehicle connection gun and the on-vehicle connection socket provided in this application embodiment are not limited to mutual adaptation. That is to say, the under-vehicle connection gun provided in this application embodiment can also be adapted to other on-vehicle connection structures to form a connection device with the above-mentioned functions. Similarly, the on-vehicle connection socket provided in this application embodiment can also be adapted to other under-vehicle connection structures to form a connection device with the above-mentioned functions.

[0063] In related technologies, high-rate overcharging of batteries places higher demands on the heat dissipation of the battery management system, which needs to dissipate the heat generated by the battery during overcharging quickly. Improving the heat dissipation capacity of the vehicle's battery management system to adapt to overcharging is not only costly, but this improvement is only effectively utilized during battery charging and becomes redundant under other operating conditions. It also increases the overall vehicle weight and leads to higher energy consumption.

[0064] Based on this, embodiments of this application provide a connection device, such as... Figure 1 As shown, the connecting device 3 can connect the liquid cooling unit 2 outside the vehicle 1 to the coolant pipeline of the battery management system on the vehicle 1. The liquid cooling unit 2 under the vehicle can be used to improve the heat dissipation capacity of the battery management system on the vehicle to the power battery of the vehicle 1, meet the heat dissipation requirements of the battery overcharging, reduce the cost of upgrading and modifying the battery management system of the vehicle 1, avoid resource waste when not charging, and have a small impact on the weight and energy consumption of the vehicle 1.

[0065] Reference Figure 2 , Figure 2A schematic diagram of the connecting device provided in this application is shown. In the following figures, the coordinate directions are: x-axis represents the first direction, y-axis represents the second direction, and z-axis represents the third direction; the second direction can be perpendicular to the first direction, and the third direction can be perpendicular to both the first and second directions. Figure 2 As shown, the connection device provided in this application embodiment may include an under-vehicle connection gun 100 and an on-vehicle connection socket 200 that can be plugged into and connected along a first direction. The first direction is the plugging direction of the under-vehicle connection gun 100 and the on-vehicle connection socket 200, referred to simply as the plugging direction. The second and third directions are respectively perpendicular to the plugging direction. In practical applications, the plugging direction can be horizontal, or it can be a direction that is tilted upwards at a certain angle to the horizontal. The on-vehicle connection socket 200 can be fixedly connected to the vehicle. The under-vehicle connector 100 may include a first housing 101, and the on-vehicle connector 200 may include a second housing 201. When the under-vehicle connector 100 and the on-vehicle connector 200 are connected, the first end of the under-vehicle connector 100 along the insertion direction can be connected to the first end of the on-vehicle connector 200 along the insertion direction. In this case, the first end of the under-vehicle connector 100 along the insertion direction can also be referred to as the insertion end of the under-vehicle connector 100. Correspondingly, the first end of the on-vehicle connector 200 along the insertion direction can also be referred to as the insertion end of the on-vehicle connector 200. Specifically, the first end of the first housing 101 along the insertion direction can be mated with the first end of the second housing 201 along the insertion direction, that is, the first end of the first housing 101 along the first direction can be mated with the first end of the second housing 201 along the first direction. The second end of the first housing 101 along the first direction can be connected to an air conditioning liquid cooling unit outside the vehicle. The second end of the second housing 201 along the first direction can be connected to the coolant lines of the vehicle's battery management system.

[0066] Figure 3 A schematic diagram of the under-vehicle connecting gun provided in this application is shown. Figure 3As shown, in a specific implementation, the under-vehicle connection gun 100 may further include a first connection confirmation terminal 102, a liquid supply plug 103, and a liquid return plug 104. The first connection confirmation terminal 102, liquid supply plug 103, and liquid return plug 104 may be respectively disposed at the first end of the first housing 101 along a first direction. The lengths of the liquid supply plug 103 and the liquid return plug 104 protruding from the first end of the first housing 101 in the first direction are the same. The liquid supply plug 103 and the liquid return plug 104 are spaced apart in a second direction, and can be respectively connected to a liquid cooling unit (or air conditioning liquid cooling unit) outside the vehicle via pipelines. Coolant flows through the liquid cooling unit. The first connection confirmation terminal 102 may be located between the liquid supply plug 103 and the liquid return plug 104 in the second direction. The first connection confirmation terminal 102 is connected to a first connection confirmation circuit. The first connection confirmation circuit may be disposed in the under-vehicle connection gun 100 or in the liquid cooling unit; for example, the first connection confirmation circuit may be integrated into the liquid cooling unit controller.

[0067] Figure 4 A schematic diagram of the vehicle-mounted connection socket provided in this application is shown. Figure 4 As shown, the vehicle connection socket 200 may further include a first connection confirmation socket 202, a liquid inlet socket 203, and a liquid outlet socket 204. The first connection confirmation socket 202, liquid inlet socket 203, and liquid outlet socket 204 may be respectively disposed at the first end of the second housing 201 along a first direction. The lengths of the liquid inlet socket 203 and liquid outlet socket 204 protruding from the first end of the second housing 201 in the first direction are the same. The liquid inlet socket 203 and liquid outlet socket 204 are spaced apart in the second direction and can be respectively connected to the coolant lines of the vehicle's battery management system via pipes. Coolant flows through the coolant lines of the battery management system. The first connection confirmation socket 202 may be located between the liquid inlet socket 203 and the liquid outlet socket 204 in the second direction. The first connection confirmation socket 202 is connected to the vehicle's third connection confirmation circuit. The third connection confirmation circuit may be disposed in the vehicle connection socket 200 or in the vehicle itself; for example, the third connection confirmation circuit may be integrated into the vehicle controller. When the undercarriage connection gun 100 and the vehicle connection socket 200 are connected, the first connection confirmation terminal 102 of the undercarriage connection gun 100 can be electrically connected to the first connection confirmation socket 202 of the vehicle connection socket 200, thereby connecting the first connection confirmation circuit and the third connection confirmation circuit. The first connection confirmation circuit and the third connection confirmation circuit form the first connection confirmation loop, which can then confirm the connection status of the liquid supply plug 103 and the liquid return plug 104 of the undercarriage connection gun 100 to the liquid inlet socket 203 and the liquid outlet socket 204 of the vehicle connection socket 200, respectively.

[0068] In practical applications, when the undercarriage connector 100 and the on-vehicle connector 200 are connected, the first end of the first housing 101 along the first direction is connected to the first end of the second housing 201 along the first direction, the liquid supply plug 103 is connected to the liquid inlet socket 203, and the liquid return plug 104 is connected to the liquid outlet socket 204. At this time, the structural conditions for the liquid cooling unit and the battery management system to communicate with each other for the transmission of coolant are met. When the first connection confirmation terminal 102 of the under-vehicle connection gun 100 is electrically connected to the first connection confirmation socket 202 of the on-vehicle connection socket 200, the first connection confirmation circuit and the third connection confirmation circuit are connected to form the first connection confirmation loop. The vehicle controller confirms that the supply plug 103 and return plug 104 of the under-vehicle connection gun 100 are successfully connected to the inlet socket 203 and outlet socket 204 of the on-vehicle connection socket 200, respectively. At this time, the vehicle controller can respond. Specifically, the vehicle controller can control the opening of the coolant pipeline of the battery management system. The vehicle controller and the liquid cooling unit controller can communicate. The liquid cooling unit controller can control the opening of the liquid cooling unit. Thus, the coolant pipeline of the battery management system and the liquid cooling unit can transmit coolant through the interconnected supply plug 103 and inlet socket 203 and the interconnected return plug 104 and outlet socket 204. The liquid cooling unit can assist the battery management system in dissipating heat from the vehicle's power battery. This achieves the goal of using the under-vehicle liquid cooling unit to improve the heat dissipation capacity of the vehicle's battery management system for the vehicle's power battery and meet the heat dissipation requirements of battery overcharging. By using the under-vehicle connection gun 100 or the on-vehicle connection socket 200 provided in this application embodiment, the heat dissipation requirements of the vehicle battery during overcharging can be met without upgrading or modifying the vehicle's battery management system, or with only a minor upgrade or modification. This can reduce the cost of upgrading or modifying the vehicle's battery management system, largely avoid the waste of resources caused by upgrading or modifying the vehicle's battery management system when the battery is not charging, and hardly increase the overall weight of the vehicle or the energy consumption of the vehicle.

[0069] In practice, the liquid supply connector 103 can be connected to a liquid cooling unit outside the vehicle via a pipeline, and the liquid supply connector 103 is sealed to the pipeline. The sealing method can be a sealing ring structure at the connection point, or sealing can be achieved by potting adhesive at the connection point. Similarly, the liquid return connector 104 can be connected to a liquid cooling unit outside the vehicle via a pipeline, and the liquid return connector 104 is sealed to the pipeline. The liquid inlet socket 203 can be connected to the coolant pipeline of the vehicle's battery management system via a pipeline, and the liquid inlet socket 203 is sealed to the pipeline. The liquid outlet socket 204 can be connected to the coolant pipeline of the vehicle's battery management system via a pipeline, and the liquid outlet socket 204 is sealed to the pipeline.

[0070] The vehicle controller can determine whether the first connection confirmation terminal 102 and the first connection confirmation socket 202 are connected and conductive by detecting changes in the voltage of the first connection confirmation circuit, that is, whether the first connection confirmation circuit and the third connection confirmation circuit are connected. Specifically, when the first connection confirmation terminal 102 and the first connection confirmation socket 202 are electrically connected, the vehicle controller detects a change in the voltage of the first connection confirmation circuit. The vehicle controller then determines that the under-vehicle connection gun 100 and the on-vehicle connection socket 200 have been successfully connected. The vehicle controller then controls the coolant lines of the battery management system to open, and communicates with the liquid cooling unit controller. The liquid cooling unit controller controls the liquid cooling unit to open, enabling the transfer of coolant between the liquid cooling unit and the battery management system. This allows the heat exchange capacity of the battery management system to be improved through the liquid cooling unit, thus enhancing the battery management system's heat exchange capability with the vehicle battery. In essence, the battery management system can both dissipate heat and heat the vehicle battery, and the liquid cooling unit can enhance both the battery management system's heat dissipation and heating capabilities.

[0071] Figure 5 A partial structural schematic diagram of the liquid supply plug of the under-vehicle connection gun provided in this application is shown. (See attached diagram.) Figure 5 As shown, in one possible design, the liquid supply plug 103 may include a sleeve 1031 and a piston tube 1032, which can be sleeved together along a first direction. The piston tube 1032 can be a hollow tubular structure, having a first end and a second end. The first end of the piston tube 1032 has an opening, and the second end is closed. The first end of the piston tube 1032 can be connected to the vehicle connection socket 200, and the second end of the piston tube 1032 can be connected to the liquid cooling unit through a pipeline. A through hole 1033 is provided on the side wall of the piston tube 1032 near the second end, which can connect the pipeline to the piston tube 1032. The piston tube 1032 and the sleeve 1031 can move relative to each other in a first direction, so that the sleeve 1031 avoids or closes the through hole 1033 of the piston tube 1032, thereby enabling the piston tube 1032 to communicate with the pipeline through the through hole 1033 to communicate with the liquid cooling unit, or to disconnect the piston tube 1032 from the pipeline to disconnect from the liquid cooling unit. Specifically, when the under-vehicle connecting gun 100 is not connected to the vehicle-mounted connecting socket 200, the sleeve 1031 closes the through hole 1033, thereby closing the passage between the pipeline and the piston tube 1032. When the under-vehicle connecting gun 100 is connected to the vehicle-mounted connecting socket 200, the sleeve 1031 avoids the through hole 1033, thereby connecting the pipeline and the piston tube 1032.

[0072] In specific implementation, the piston tube 1032 can be movably sleeved inside the sleeve 1031, and the piston tube 1032 can move relative to the sleeve 1031. A spring can be installed inside the sleeve 1031, with both ends of the spring connected to the piston tube 1032 and the sleeve 1031 respectively. When the under-vehicle connecting gun 100 and the on-vehicle connecting socket 200 are plugged in, the piston tube 1032 moves relative to the sleeve 1031.

[0073] The return connector 104 can have the same structure as the supply connector 103, and the inlet and outlet connectors 203 can also have the same structure as the supply connector 103. For example, the inlet connector 203 has the same structure as the supply connector 103, and the supply connector 103 and the inlet connector 203 form a male-female pair. The sleeve of the inlet connector 203 avoids or closes the through hole of the piston tube, allowing the piston tube to connect to the coolant lines of the vehicle's battery management system through the through hole, or to disconnect the piston tube from the coolant lines of the vehicle's battery management system. Similarly, the return connector 104 and the outlet connector 204 can also form a male-female pair.

[0074] Taking the liquid supply plug 103 and the liquid inlet socket 203 forming a male-female connector as an example, when the connectors are not connected, the sleeves 1031 of each connector close the through holes 1033 on the piston tube 1032 under the elastic force of the spring. When the under-vehicle connecting gun 100 and the on-vehicle connecting socket 200 are plugged in, the liquid supply plug 103 and the liquid inlet socket 203 are connected, and the piston tubes 1032 of the liquid supply plug 103 and the liquid inlet socket 203 abut against each other. The piston tubes 1032 of the liquid supply plug 103 and the liquid inlet socket 203 move independently, and the through holes 1033 on the piston tube 1032 are closed. The sleeve 1031 avoids the hole 1033, allowing the two connectors to communicate with each other, thus enabling coolant flow between the coolant lines of the liquid cooling unit and the vehicle's battery management system. When the under-vehicle connecting gun 100 and the on-vehicle connecting socket 200 are separated, the supply plug 103 and the inlet socket 203 separate. The piston tubes 1032 of the supply plug 103 and the inlet socket 203 move in opposite directions under the spring force, and the through holes 1033 on the piston tubes 1032 of each connector are sealed by the sleeve 1031, ensuring that each connector is shut off and preventing leakage. Similarly, the return plug 104 and the outlet socket 204 form a male-female connector, which communicate with each other when connected and shut off when separated.

[0075] As one possible implementation method, such as Figure 2As shown, the first housing 101 may be provided with a first positioning through hole 105, which is located near the first end of the first housing 101 along the first direction. A locking part 300 may be fixedly connected or pluggably connected inside the first positioning through hole 105. The second housing 201 may be provided with a second positioning through hole 205, which is located near the first end of the second housing 201 along the first direction. The position of the second positioning through hole 205 corresponds to the position of the first positioning through hole 105 in the second or third direction.

[0076] When the undercarriage connector 100 and the vehicle-mounted connector 200 are connected, the locking part 300 can extend vertically from the first positioning through hole 105 into the second positioning through hole 205 in a first direction, or extend vertically from the first positioning through hole 105 into the second positioning through hole 205 in a third direction, to lock the relative positions of the first housing 101 and the second housing 201, thereby locking the relative positions of the undercarriage connector 100 and the vehicle-mounted connector 200 and preventing the undercarriage connector 100 from being pulled out uncontrollably. In specific implementation, the first positioning through hole 105 can be set on the top or one side of the first housing 101, and correspondingly, the second positioning through hole 205 can be set on the top or one side of the second housing 201. In this way, when the undercarriage connector 100 and the vehicle-mounted connector 200 are connected, the locking part 300 can be located on the top or one side of the entire undercarriage connector 100 and the vehicle-mounted connector 200, making it convenient to operate the locking part 300. Specifically, the locking part 300 may be an electronic lock, which may be controlled by the vehicle controller or the liquid cooling unit controller.

[0077] In specific implementation, the locking part 300 can also be fixedly connected or pluggably connected to the second positioning through hole 205. When the under-vehicle connecting gun 100 and the on-vehicle connecting socket 200 are plugged in, the locking part 300 can extend from the second positioning through hole 205 into the first positioning through hole 105 in the vertical direction of the first direction to lock the relative position of the first housing 101 and the second housing 201.

[0078] As one possible implementation method, such as Figure 3As shown, the first housing 101 may be provided with an assist handle structure 400. The assist handle structure 400 may include a grip portion 403, a first connecting portion 401, and a second connecting portion 402. The first connecting portion 401 and the second connecting portion 402 are spaced apart, and the first connecting portion 401 and the second connecting portion 402 are respectively connected to both ends of the grip portion 403. In a specific implementation, the first connecting portion 401 and the second connecting portion 402 may be connected to opposite sides of the first housing 101 along a second direction. In a specific implementation, the assist handle may be a U-shaped structure, with the first connecting portion 401 and the second connecting portion 402 serving as two opposite sides of the U-shaped structure. Specifically, both the first connecting portion 401 and the second connecting portion 402 may be strip-shaped structures, with one end of the first connecting portion 401 free and one end of the second connecting portion 402 free. The other ends of the first connecting portion 401 and the second connecting portion 402 are connected through the grip portion 403, thus forming a U-shaped structure. The grip portion 403 can be a strip-shaped structure, and may have a groove to fit the shape of a human hand for stable gripping. The first connecting portion 401 and the second connecting portion 402 can be connected to the left and right sides of the first housing 101, or to the top and bottom sides of the first housing 101, respectively. A hinged connection can be used for this purpose. In practical applications, the assist handle structure 400 can rotate within a certain angle range relative to the undercarriage connector 100 to adjust the assist angle, making it easier to connect the undercarriage connector 100 to the vehicle connector socket 200.

[0079] In specific implementations, the power handle structure 400 may only include a grip portion 403, which may be located near the second or first end of the first housing 101 along the first direction. The grip portion 403 may be U-shaped, arc-shaped, etc., in which case both ends of the grip portion 403 may be fixedly connected to the first housing 101 respectively; alternatively, the grip portion 403 may be straight, arc-shaped, etc., in which case one end of the grip portion 403 may be fixedly connected to the first housing 101, while the other end is free. In actual use, the operator can hold the grip portion 403 to apply force to the undercarriage connection gun 100, causing the undercarriage connection gun 100 to connect to the vehicle connection socket 200.

[0080] Figure 6 A schematic diagram of the under-vehicle connecting gun provided in this application is shown. Figure 6As shown in the embodiments of this application, the connection device may further include a plug-in auxiliary structure 500, which may be installed on a vehicle. The plug-in auxiliary structure 500 may include a tow frame 501 extending and movable along a first direction. One end of the tow frame 501 may be movably connected to the vehicle, and the other end of the tow frame 501 may be provided with an abutment portion 502. The tow frame 501 may be installed at the same position on the vehicle as the vehicle connection socket 200, and the tow frame 501 may cover the vehicle connection socket 200 in the first direction.

[0081] In a specific configuration, the outer wall of the undercarriage connector 100 may be provided with a protrusion 109. Specifically, the outer wall of the first housing 101 may be provided with a protrusion 109, which may be located near the first end of the first housing 101 along the first direction. Along the first direction, the projection of the protrusion 109 at least partially overlaps with the projection of the abutment portion 502. When the towing frame 501 moves towards the vehicle-mounted connector 200 along the first direction, the protrusion 109 abuts against the abutment portion 502. The towing frame 501 can help overcome the resistance when the undercarriage connector 100 is inserted into the vehicle-mounted connector 200 (such as the spring force in the above description of the liquid supply plug 103), pulling the undercarriage connector 100 from the first position to the second position, that is, pulling the undercarriage connector 100 towards the vehicle-mounted connector 200, so that the undercarriage connector 100 is inserted into the vehicle-mounted connector 200, thereby assisting in completing the insertion of the undercarriage connector 100 into the vehicle-mounted connector 200.

[0082] In actual setup, the tow frame 501 can be connected to the vehicle's power source. For example, the tow frame 501 can be connected to the vehicle's air source. Specifically, the tow frame 501 can be connected to the vehicle's cylinder, and the cylinder drives the tow frame 501 to move, thus enabling the tow frame 501 to move along the first direction.

[0083] In specific implementation, when the under-vehicle connecting gun 100 is connected to the vehicle-mounted connecting socket 200 and the under-vehicle connecting gun 100 is in the first position, the towing frame 501 pulls the under-vehicle connecting gun 100 from the first position to the second position, so that the under-vehicle connecting gun 100 and the vehicle-mounted connecting socket 200 are fully connected, that is, the under-vehicle connecting gun 100 and the vehicle-mounted connecting socket 200 are successfully connected. Combined with... Figure 3 and Figure 4As shown, the undercarriage connector 100 may further include a signal trigger terminal 106, which may be disposed at a first end of the first housing 101 along a first direction. The vehicle-mounted connector 200 may further include a signal trigger socket 206, which may be disposed at a first end of the second housing 201 along a first direction. When the undercarriage connector 100 is in the first position, the signal trigger socket 206 and the signal trigger terminal 106 may be electrically connected to connect to the vehicle's control circuit to confirm the connection position of the undercarriage connector 100; the vehicle's control circuit may be integrated into the vehicle controller. Exemplarily, the tow bracket 501 is connected to the vehicle's cylinder. When the signal trigger socket 206 and the signal trigger terminal 106 are electrically connected, the vehicle controller responds. Specifically, the vehicle controller controls the cylinder to operate, thereby controlling the tow bracket 501 to move, causing the tow bracket 501 to pull the undercarriage connector 100 from the first position to the second position, completing the connection between the undercarriage connector 100 and the vehicle-mounted connector 200.

[0084] In specific implementation, the signal trigger terminal 106 can be located between the liquid supply plug 103 and the liquid return plug 104 in the second direction. The signal trigger terminal 106 and the first connection confirmation terminal 102 are spaced apart in the third direction, and the first connection confirmation terminal 102 and the signal trigger terminal 106 can be arranged in a row in the third direction. The signal trigger socket 206 can be located between the liquid inlet socket 203 and the liquid outlet socket 204 in the second direction. The signal trigger socket 206 and the first connection confirmation socket 202 are spaced apart in the third direction. The first connection confirmation socket 202 and the signal trigger socket 206 can be arranged in a row in the third direction.

[0085] In the first direction, the length of the first connection confirmation terminal 102 protruding from the first housing 101 and the length of the first connection confirmation socket 202 protruding from the second housing 201 are L3, and the length of the signal trigger terminal 106 protruding from the first housing 101 and the length of the signal trigger socket 206 protruding from the second housing 201 are L2, where L3 < L2. During the connection process between the under-vehicle connection gun 100 and the on-vehicle connection socket 200, the signal trigger terminal 106 connects to the signal trigger socket 206 first, and the first connection confirmation terminal 102 connects to the first connection confirmation socket 202 subsequently. Specifically, when the under-vehicle connection gun 100 is in the first position, the signal trigger terminal 106 is electrically connected to the signal trigger socket 206, and at this time, the first connection confirmation terminal 102 is not connected to the first connection confirmation socket 202; when the under-vehicle connection gun 100 is in the second position, the first connection confirmation terminal 102 is electrically connected to the first connection confirmation socket 202. Figure 7 The diagram illustrates the terminals of the under-vehicle connector 100 and the corresponding sockets of the on-vehicle connector 200. Figure 7In the diagram, "plug" refers to the gun side (or plug side), corresponding to the under-vehicle connection gun 100; "socket" refers to the vehicle side (or socket side), corresponding to the vehicle-mounted connection socket 200; CC3 represents the length of the first connection confirmation terminal 102 protruding from the first housing 101 and the length of the first connection confirmation socket 202 protruding from the second housing 201, respectively; CC2 represents the length of the signal trigger terminal 106 protruding from the first housing 101 and the length of the signal trigger socket 206 protruding from the second housing 201, respectively. Figure 7 As shown, d3 > d2 (or d3' > d2'), which means that L3 < L2 as mentioned above.

[0086] In practical applications, when the undercarriage connector 100 is in the first position, it corresponds to the undercarriage connector 100 and the vehicle-mounted connector 200 being in a semi-connected state. At this time, the signal trigger terminal 106 and the signal trigger connector 206 are electrically connected. The vehicle controller controls the towing frame 501 to move to pull the undercarriage connector 100 from the first position to the second position, so that the undercarriage connector 100 is plugged into the vehicle-mounted connector 200, that is, the undercarriage connector 100 and the vehicle-mounted connector 200 are fully connected. When the under-vehicle connection gun 100 is in the second position, that is, when the under-vehicle connection gun 100 is fully connected to the on-vehicle connection socket 200, the liquid supply plug 103 is connected to the liquid inlet socket 203, and the liquid return plug 104 is connected to the liquid outlet socket 204. The structural condition for the liquid cooling unit and the battery management system's coolant pipeline to be interconnected for coolant transmission is achieved. At this time, the first connection confirmation terminal 102 is electrically connected to the first connection confirmation socket 202, the vehicle controller controls the opening of the battery management system's coolant pipeline, the vehicle controller communicates with the liquid cooling unit controller, the liquid cooling unit controller controls the liquid cooling unit to be opened, and coolant can be transmitted between the battery management system's coolant pipeline and the liquid cooling unit.

[0087] Figure 8 Another structural schematic diagram of the undercarriage connecting gun provided in this application is shown. Figure 9 Another structural schematic diagram of the vehicle-mounted connection socket provided in this application is shown. (See diagram below.) Figure 8 As shown, the under-vehicle connection gun 100 may also include multiple charging plugs 107. In this case, the under-vehicle connection gun 100 can transmit both coolant and electrical energy, and can be called a composite connection gun. Multiple charging plugs 107 can be disposed at a first end of the first housing 101 along a first direction. One end of the charging plug 107 can be connected to the power module of the charging device, and the other end of the charging plug 107 outputs DC power. Figure 9As shown, corresponding to the under-vehicle connection gun 100, the on-vehicle connection socket 200 may also include multiple charging sockets 207. Similarly, in this case, the on-vehicle connection socket 200 can transmit both coolant and electrical energy, and can be called a composite connection socket. Multiple charging sockets 207 can be disposed at the first end of the second housing 201 along the first direction, and can be electrically connected to the vehicle's battery. The length of the charging plug 107 protruding from the first end of the first housing 101 in the first direction is the same as the length of the charging socket 207 protruding from the first end of the second housing 201 in the first direction. When the under-vehicle connection gun 100 and the on-vehicle connection socket 200 are plugged in, the multiple charging plugs 107 and the multiple charging sockets 207 are electrically connected one-to-one, enabling the charging equipment to charge the vehicle's battery.

[0088] In a specific implementation, for example, the under-vehicle connection gun 100 includes three charging plugs 107, which serve as the positive (DC+), negative (DC-), and ground (PE) terminals of the under-vehicle connection gun 100, respectively. The on-vehicle connection socket 200 includes three charging sockets 207, which similarly serve as the positive (DC+), negative (DC-), and ground (PE) terminals of the on-vehicle connection socket 200, respectively. When the under-vehicle connection gun 100 and the on-vehicle connection socket 200 are connected, the three charging plugs 107 and the three charging sockets 207 are electrically connected in a one-to-one correspondence. Specifically, the charging plug 107 serving as the positive terminal is electrically connected to the corresponding positive charging socket 207, the charging plug 107 serving as the negative terminal is electrically connected to the corresponding negative charging socket 207, and the charging plug 107 serving as the ground terminal is electrically connected to the corresponding ground charging socket 207.

[0089] In a specific implementation, the under-vehicle connection gun 100 may further include a second connection confirmation terminal 108, which may be disposed at a first end of the first housing 101 along a first direction. The second connection confirmation terminal 108 may be located between the liquid supply plug 103 and the liquid return plug 104 in a second direction, and the second connection confirmation terminal 108 and the first connection confirmation terminal 102 may be spaced apart in a third direction. The first connection confirmation terminal 102, the signal trigger terminal 106, and the second connection confirmation terminal 108 may be arranged in a row in a third direction. The second connection confirmation terminal 108 is connected to a second connection confirmation circuit. The second connection confirmation circuit may be disposed in the under-vehicle connection gun 100 or in a charging device; for example, the second connection confirmation circuit may be integrated into the charging device controller. Correspondingly to the under-vehicle connection gun 100, the on-vehicle connection socket 200 may further include a second connection confirmation socket 208, which may be disposed at a first end of the second housing 201 along a first direction. The second connection confirmation socket 208 can be located between the inlet socket 203 and the outlet socket 204 in the second direction. The second connection confirmation socket 208 and the first connection confirmation socket 202 are spaced apart in the third direction. The first connection confirmation socket 202, the signal trigger socket 206, and the second connection confirmation socket 208 can be arranged in a row in the third direction. The second connection confirmation socket 208 is connected to the fourth connection confirmation circuit. The fourth connection confirmation circuit can be installed in the vehicle connection socket 200 or in the vehicle itself; for example, the fourth connection confirmation circuit can be integrated into the vehicle controller.

[0090] When the undercarriage connector 100 and the vehicle connector 200 are plugged in, the second connection confirmation terminal 108 of the undercarriage connector 100 can be electrically connected to the second connection confirmation socket 208 of the vehicle connector 200, thereby connecting the second connection confirmation circuit and the fourth connection confirmation circuit. The second connection confirmation circuit and the fourth connection confirmation circuit form a second connection confirmation loop, which can then confirm the connection status between the charging plug 107 of the undercarriage connector 100 and the charging socket 207 of the vehicle connector 200. When the second connection confirmation terminal 108 and the second connection confirmation socket 208 are electrically connected, the second connection confirmation circuit and the fourth connection confirmation circuit form a second connection confirmation loop. The vehicle controller confirms that the charging plug 107 of the under-vehicle connection gun 100 and the charging socket 207 of the on-vehicle connection socket 200 are successfully connected. At this time, the vehicle controller can respond. Specifically, the vehicle controller can control the charging circuit of the vehicle's battery to be turned on. The vehicle controller and the charging equipment controller can communicate. The charging equipment controller can control the charging circuit of the charging equipment to be turned on. Thus, the charging equipment and the vehicle's battery can transmit electrical energy through the mutually connected charging plug 107 and charging socket 207, so that the charging equipment can charge the vehicle's battery.

[0091] In specific implementation, in the first direction, the length of the first connection confirmation terminal 102 protruding from the first housing 101 and the length of the first connection confirmation socket 202 protruding from the second housing 201 are L3, and the length of the second connection confirmation terminal 108 protruding from the first housing 101 and the length of the second connection confirmation socket 208 protruding from the second housing 201 are L1, where L1 ≤ L3. (Refer to again...) Figure 7 ,exist Figure 7 In the diagram, CC1 represents the length of the second connection confirmation terminal 108 protruding from the first housing 101 and the length of the second connection confirmation socket 208 protruding from the second housing 201, respectively. Figure 7 As shown, d1≥d3 (or d1'≥d3') indicates that L1≤L3 as mentioned above.

[0092] During the connection process between the under-vehicle connection gun 100 and the on-vehicle connection socket 200, there are two possible connection scenarios for the connection confirmation terminals. One scenario is that the first connection confirmation terminal 102 is connected to the first connection confirmation socket 202 first, and then the second connection confirmation terminal 108 is connected to the second connection confirmation socket 208. The other scenario is that the first connection confirmation terminal 102 is connected to the first connection confirmation socket 202 while the second connection confirmation terminal 108 is connected to the second connection confirmation socket 208. Both connection scenarios ensure that the vehicle is charged while it is connected to the liquid cooling unit. This allows the vehicle to be connected to the liquid cooling unit first and then to the charging equipment, ensuring that the heat dissipation requirements of the vehicle's battery overcharging are met and guaranteeing the safety and stability of overcharging.

[0093] In practice, besides Figure 3 Besides the arrangement shown, the first connection confirmation terminal 102, signal trigger terminal 106, and second connection confirmation terminal 108 can also be arranged in other ways. For example, the first connection confirmation terminal 102, signal trigger terminal 106, and second connection confirmation terminal 108 can be arranged in a row in the second direction, or the first connection confirmation terminal 102, signal trigger terminal 106, and second connection confirmation terminal 108 can be arranged in multiple rows in the second and third directions. The first connection confirmation socket 202, signal trigger socket 206, and second connection confirmation socket 208 can also be arranged in other different ways. When the under-vehicle connection gun 100 and the on-vehicle connection socket 200 are plugged in, they can be electrically connected to the corresponding first connection confirmation terminal 102, signal trigger terminal 106, and second connection confirmation terminal 108, respectively.

[0094] As one possible implementation, a cooling pool can be provided inside the under-vehicle connection gun 100, and the cooling pool can make thermally conductive contact with the charging plug 107. Specifically, the cooling pool can be formed inside the first housing 101. The thermally conductive contact mentioned here can be direct contact or indirect contact. A cable electrically connected to the charging plug 107 can be provided inside the first housing 101, realizing the electrical connection between the charging plug 107 and the charging device, and the cooling pool can simultaneously make thermally conductive contact with the cable electrically connected to the charging plug 107.

[0095] The cooling tank has a liquid inlet and a liquid outlet, which can be respectively located at the second end of the first housing 101 along a first direction, and are spaced apart in a second direction. The liquid inlet and the liquid outlet can be respectively connected to a liquid cooling unit outside the vehicle via pipelines. The vertical (e.g., a third direction) projection of the cooling tank along the insertion direction can cover at least a portion of the charging plug 107 and at least a portion of the cable electrically connected to the charging plug 107, so that the liquid cooling unit can dissipate heat from the cable when the charging equipment is charging the vehicle's battery.

[0096] In specific implementation, the first housing 101 may have pipes arranged inside, serving as cooling pools for the coolant. The two ends of the pipes serve as inlet and outlet ports, respectively. Vertically in the insertion direction, the pipe routing path may coincide with the routing positions of at least a portion of the charging plug 107 and at least a portion of the cables electrically connected to the charging plug 107. Alternatively, the first housing 101 may have a cavity forming inside, serving as a cooling pool for the coolant. The cavity has an inlet and outlet port, and vertically in the insertion direction, the cavity may cover at least a portion of the charging plug 107 and at least a portion of the cables electrically connected to the charging plug 107. The first housing 101 may have multiple cooling pools inside, sharing the same inlet and outlet ports. Each cooling pool may correspond to a cable electrically connected to a different charging plug 107, achieving separate heat dissipation for each cable. For example, the first housing 101 is provided with two cooling pools, which are respectively provided for the cables that are electrically connected to the positive (DC+) and negative (DC-) terminals of the under-vehicle connection gun 100. That is, the two cooling pools are respectively provided for the positive and negative cables of the under-vehicle connection gun 100, so as to dissipate heat from the positive and negative cables respectively.

[0097] In one possible implementation, the first end of the under-vehicle connection gun 100 may further include an auxiliary power plug. One end of the auxiliary power plug can be connected to the auxiliary power socket of the on-vehicle connection socket 200, and the other end of the auxiliary power plug can be connected to the low-voltage auxiliary power supply of the charging device. Correspondingly, the first end of the on-vehicle connection socket 200 may also include an auxiliary power socket. One end of the auxiliary power socket can be connected to the auxiliary power plug of the under-vehicle connection gun 100, and the other end of the auxiliary power socket can be connected to the vehicle's battery management system. In practical applications, the low-voltage auxiliary power supply can be used to power the battery management system.

[0098] The first end of the under-vehicle connection gun 100 may also include a communication plug. One end of the communication plug can connect to the communication socket of the on-vehicle connection socket 200, and the other end of the communication plug can connect to the controller of the charging equipment. Correspondingly, the first end of the on-vehicle connection socket 200 may also include a communication socket. One end of the communication socket can connect to the communication plug of the under-vehicle connection gun 100, and the other end of the communication socket can connect to the vehicle's battery management system. In practical applications, after the communication plug and communication socket are connected, the controller of the charging equipment and the vehicle's battery management system can communicate with each other.

[0099] This application also provides a liquid cooling device, such as... Figure 1 As shown, the liquid cooling device may include a liquid cooling unit 2 and the aforementioned under-vehicle connection gun 100. In this case, the under-vehicle connection gun 100 may only have the function of transferring coolant; that is, it may not be a composite connection gun, but simply a liquid connection gun. The liquid cooling unit 2 is located outside the vehicle 1, or in other words, it is located under the vehicle, for example, in a charging station or similar location. The under-vehicle connection gun 100 can connect to the liquid cooling unit 2, and then connect to the coolant lines of the battery management system of the vehicle 1 via the on-vehicle connection socket 200 or other on-vehicle connection structures. The under-vehicle connection gun 100 can be plugged into the on-vehicle connection socket 200, so that when the vehicle 1 is charging, the liquid cooling unit 2 and the coolant lines of the battery management system can communicate to transfer coolant, enabling the liquid cooling unit 2 to assist the battery management system in dissipating heat from the battery of the vehicle 1. Specifically, after the supply and return connectors of the under-vehicle connection gun 100 are successfully connected to the on-vehicle connection socket, the liquid cooling unit can output coolant to the vehicle's battery management system through the supply connector to dissipate heat from the battery of vehicle 1. The liquid cooling unit can receive the coolant output from the battery management system through the return connector. Therefore, supercharging of the vehicle 1's battery can be achieved without upgrading or modifying the vehicle's battery management system. This not only saves on the cost of upgrading or modifying vehicle 1 but also avoids redundancy when the battery is not charging, thus preventing an increase in the overall weight and energy consumption of vehicle 1.

[0100] In practice, a liquid-cooled unit may include a heat exchanger, a coolant tank, and a water pump. A supply connector and a return connector are connected to at least one of the heat exchanger and the coolant tank via piping. The coolant tank holds the coolant. The heat exchanger receives the coolant supplied via piping from the return connector. The water pump drives the coolant to flow between the supply connector, the return connector, the heat exchanger, and the coolant tank.

[0101] This application also provides a charging device, such as... Figure 1 As shown, the charging equipment may include charging pile 4, liquid cooling unit 2, liquid cooling unit controller, vehicle controller, and the aforementioned under-vehicle connection gun 100. The under-vehicle connection gun 100 can function as both a coolant transfer device and a power transfer device, making it a composite connection gun. The charging pile 4 and liquid cooling unit 2 can be installed adjacent to each other or integrated into a single unit to save under-vehicle space and facilitate centralized management and maintenance. The charging pile 4 may include a power module. The under-vehicle connection gun 100 can be electrically connected to the power module of the charging pile 4 while simultaneously being connected to the liquid cooling unit 2. The on-vehicle connection socket 200 can be electrically connected to the coolant lines of the battery management system of vehicle 1, and also to the battery of vehicle 1. When the under-vehicle connection gun 100 and the on-vehicle connection socket 200 are plugged in, the liquid cooling unit 2 can assist the battery management system in cooling the battery of vehicle 1, while simultaneously electrically connecting the charging pile 4 and the battery of vehicle 1, thus enabling the charging pile 4 to charge the battery of vehicle 1. Specifically, after the charging plug, liquid supply plug, and liquid return plug of the under-vehicle connecting gun 100 are successfully connected to the composite connecting socket or other on-vehicle connection structures, the power module can output DC power to the vehicle's battery through the charging plug to charge the battery. The liquid cooling unit can output coolant to the vehicle's battery management system through the liquid supply plug to dissipate heat from the battery. The liquid cooling unit can receive coolant output from the battery management system through the liquid return plug.

[0102] In practical implementation, the liquid cooling unit controller and the vehicle controller can communicate with each other, for example, through a wireless module. When the first connection confirmation terminal 102 of the under-vehicle connection gun 100 and the first connection confirmation socket 202 of the on-vehicle connection socket 200 are electrically connected, the liquid cooling unit controller controls the liquid cooling unit 2 to transfer coolant to the under-vehicle connection gun 100, and the vehicle controller controls the coolant lines of the battery management system of vehicle 1 to transfer coolant to the on-vehicle connection socket 200. As described above, when the first connection confirmation terminal 102 of the under-vehicle connection gun 100 and the first connection confirmation socket 202 of the on-vehicle connection socket 202 are electrically connected, the liquid supply plug 103 and the liquid inlet socket 203 are already connected to each other, and the liquid return plug 104 and the liquid outlet socket 204 are also connected to each other. Thus, coolant can be transferred between the liquid cooling unit 2 and the battery management system of vehicle 1, and the liquid cooling unit 2 can assist the battery management system in dissipating heat from the battery of vehicle 1 to meet the heat dissipation requirements of the battery overcharging of vehicle 1. The charging pile 4 and the vehicle controller can communicate with each other through wireless modules, etc. When the second connection confirmation terminal 108 of the under-vehicle connection gun 100 and the second connection confirmation socket 208 of the on-vehicle connection socket 200 are electrically connected, the charging plug 107 and the charging socket 207 are electrically connected to each other. Thus, the charging pile 4 and the battery of the vehicle 1 can transmit electrical energy, so that the charging pile 4 can charge the battery of the vehicle 1.

[0103] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects. "Including at least one of A, B, and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0104] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

[0105] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A composite connector gun for use in charging equipment, characterized in that, The composite connector gun is used to connect to the composite connector socket installed on the vehicle. The composite connector gun includes a plug-in end for plugging into the composite connector socket along the plugging direction. The plug-in end includes a liquid supply plug, a liquid return plug, and a charging plug. The liquid supply plug and the liquid return plug are connected to a liquid cooling unit via pipelines, wherein the liquid cooling unit includes coolant. One end of the charging plug is used to connect to the power module of the charging device, and the other end of the charging plug is used to output DC power. The plug-in terminal further includes a first connection confirmation terminal and a second connection confirmation terminal. One end of the first connection confirmation terminal is used to connect to the first connection confirmation socket of the composite connection socket, and the other end of the first connection confirmation terminal is used to connect to the first connection confirmation circuit. One end of the second connection confirmation terminal is used to connect to the second connection confirmation socket of the composite connection socket, and the other end of the second connection confirmation terminal is used to connect to the second connection confirmation circuit; When the first connection confirmation terminal is connected to the first connection confirmation socket, the first connection confirmation circuit and the connection confirmation circuit connected to the first connection confirmation socket form a first connection confirmation loop. The first connection confirmation loop is used to confirm the connection status of the liquid supply plug and the liquid return plug with the composite connection socket. When the second connection confirmation terminal is connected to the second connection confirmation socket, the second connection confirmation circuit and the connection confirmation circuit connected to the second connection confirmation socket form a second connection confirmation loop. The second connection confirmation loop is used to confirm the connection status of the charging plug and the composite connection socket. The length of the second connection confirmation terminal exposed on the plug end of the composite connection gun in the plugging direction is L1, and the length of the first connection confirmation terminal exposed on the plug end of the composite connection gun in the plugging direction is L3, where L1≤L3.

2. The composite connecting gun as described in claim 1, characterized in that, The liquid supply plug includes a sleeve and a piston tube, which are sleeved together along the insertion direction; The piston tube is a hollow tubular structure. The first end of the piston tube includes an opening, and the second end of the piston tube is closed. The first end of the piston tube is used to connect with the composite connection socket. The side wall of the piston tube near the second end includes a through hole, which is used to connect the pipeline and the piston tube. The piston tube and the sleeve can move relative to each other along the insertion direction. When the composite connection gun is not connected to the composite connection socket, the sleeve closes the through hole, thereby closing the channel between the pipeline and the piston tube. When the composite connection gun is connected to the composite connection socket, the sleeve avoids the through hole, thereby connecting the pipeline and the piston tube.

3. The composite connecting gun as described in claim 1 or 2, characterized in that, The composite connector gun further includes a first housing, which has a first end along the insertion direction. The first end of the first housing is used to connect to the composite connector socket, and the liquid supply plug and the liquid return plug are respectively disposed at the first end of the first housing. The first end of the first housing includes a first positioning through hole, and the first positioning through hole includes a locking part; When the composite connector gun and the composite connector socket are plugged in, the locking part extends from the first positioning through hole into the composite connector socket in the vertical direction of the plugging direction to lock the relative position of the composite connector gun and the composite connector socket.

4. The composite connecting gun as described in any one of claims 1 to 3, characterized in that, The composite connector gun also includes an assist handle structure, which includes a grip, a first connecting part, and a second connecting part. The first connecting part and the second connecting part are respectively connected to both ends of the grip, and the first connecting part and the second connecting part are respectively connected to the two vertically opposite sides of the composite connector gun along the insertion direction.

5. The composite connecting gun as described in any one of claims 1 to 4, characterized in that, The vehicle is provided with a plug-in auxiliary structure, which includes a towing frame that extends along the plug-in direction and is movable along the plug-in direction. One end of the towing frame is movably connected to the vehicle, and the other end of the towing frame is provided with an abutment portion. The outer wall of the composite connector gun includes a protrusion, which is located near the insertion end of the composite connector gun along the insertion direction. The projection of the protrusion at least partially overlaps with the projection of the abutment portion along the insertion direction. When the composite connector is connected to the composite connector socket and the composite connector is in the first position, the traction frame pulls the composite connector from the first position to the second position so that the composite connector is fully connected to the composite connector socket.

6. The composite connecting gun as described in claim 5, characterized in that, The composite connector gun also includes a signal trigger terminal, which is disposed at the plug end of the composite connector gun. When the composite connector gun is in the first position, the signal trigger terminal is electrically connected to the signal trigger terminal of the composite connector socket. In response to the electrical connection between the signal trigger terminal and the signal trigger terminal of the composite connection socket, the traction frame pulls the composite connection gun from the first position to the second position so that the composite connection gun is successfully connected to the composite connection socket.

7. The composite connecting gun as described in claim 6, characterized in that, The first connection confirmation terminal, the second connection confirmation terminal, and the signal trigger terminal are respectively located between the liquid supply plug and the liquid return plug in the vertical direction of the insertion direction; The first connection confirmation terminal, the second connection confirmation terminal, and the signal trigger terminal are spaced apart vertically in the insertion direction.

8. The composite connecting gun as described in claim 6 or 7, characterized in that, The length of the signal trigger terminal exposed by the plug end of the composite connector gun in the plugging direction is L2, and L3 < L2; When the composite connector gun is in the first position, the signal trigger terminal is electrically connected to the signal trigger terminal of the composite connector socket; when the composite connector gun is in the second position, the first connection confirmation terminal is electrically connected to the connection confirmation terminal of the composite connector socket.

9. The composite connecting gun according to any one of claims 1 to 8, characterized in that, The composite connector gun is equipped with a cooling pool, which is in thermal contact with the charging plug. The cooling pool includes a liquid inlet and a liquid outlet, which are connected to the liquid cooling unit.

10. The composite connecting gun according to any one of claims 1 to 9, characterized in that, The plug-in end of the composite connector gun also includes an auxiliary power plug. One end of the auxiliary power plug is used to connect to the auxiliary power socket of the composite connector, and the other end of the auxiliary power plug is used to connect to the low-voltage auxiliary power supply of the charging device.

11. The composite connecting gun as described in any one of claims 1 to 10, characterized in that, The plug-in end of the composite connector gun also includes a communication plug, one end of which is used to connect to the communication socket of the composite connector socket, and the other end of which is used to connect to the controller of the charging device.

12. A composite connector socket, characterized in that, The composite connector is used for connecting to a composite connector gun outside of a vehicle. The composite connector includes a plug-in end for plugging into the composite connector gun along the plugging direction. The plug-in end includes an inlet socket, an outlet socket, and a charging socket. The inlet socket and the outlet socket are connected to the coolant lines of the vehicle's battery management system via pipelines. One end of the charging socket is used to connect to the vehicle's battery, and the other end of the charging socket is used to input DC power. The plug-in terminal also includes a first connection confirmation socket and a second connection confirmation socket. One end of the first connection confirmation socket is used to connect to the first connection confirmation terminal of the composite connection gun, and the other end of the first connection confirmation socket is used to connect to a third connection confirmation circuit. One end of the second connection confirmation socket is used to connect to the second connection confirmation terminal of the composite connection gun, and the other end of the second connection confirmation socket is used to connect to a fourth connection confirmation circuit. When the first connection confirmation terminal is connected to the first connection confirmation socket, the third connection confirmation circuit and the connection confirmation circuit connected to the first connection confirmation terminal form a first connection confirmation loop. The first connection confirmation loop is used to confirm the connection status of the liquid inlet socket and the liquid outlet socket with the composite connection gun. When the second connection confirmation terminal is connected to the second connection confirmation socket, the fourth connection confirmation circuit and the connection confirmation circuit connected to the second connection confirmation terminal form a second connection confirmation loop. The second connection confirmation loop is used to confirm the connection status of the charging socket and the composite connection gun. The length of the second connection confirmation socket that exposes the plug end of the composite connection socket in the plugging direction is L1, and the length of the first connection confirmation socket that exposes the plug end of the composite connection socket in the plugging direction is L3, where L1 ≤ L3.

13. The composite connector socket as described in claim 12, characterized in that, The liquid inlet socket includes a sleeve and a piston tube, which are sleeved together along the insertion direction; The piston tube is a hollow tubular structure. The first end of the piston tube has an opening, and the second end of the piston tube is closed. The first end of the piston tube is used to connect with the composite connecting gun. The side wall of the piston tube near the second end has a through hole, which is used to connect the pipeline and the piston tube. The piston tube and the sleeve can move relative to each other along the insertion direction. When the composite connector socket is not connected to the composite connector gun, the sleeve closes the through hole, thereby closing the channel between the pipeline and the piston tube. When the composite connector socket is connected to the composite connector gun, the sleeve avoids the through hole, thereby connecting the pipeline and the piston tube.

14. The composite connector socket as described in claim 12 or 13, characterized in that, The composite connector further includes a second housing, which has a first end along the insertion direction. The first end of the second housing is used to connect the composite connector gun, and the liquid inlet and liquid outlet are respectively disposed at the first end of the second housing. The first end of the second housing includes a second positioning through hole, and the second positioning through hole includes a locking part; When the composite connector gun and the composite connector socket are plugged in, the locking part extends from the second positioning through hole into the composite connector gun in the vertical direction of the plugging direction to lock the relative position of the composite connector gun and the composite connector socket.

15. The composite connector as described in any one of claims 12 to 14, characterized in that, The composite connector also includes an auxiliary power socket, one end of which is used to connect to the auxiliary power plug of the composite connector gun, and the other end of which is used to connect to the vehicle's battery management system.

16. The composite connector as described in any one of claims 12 to 15, characterized in that, The composite connector also includes a communication connector, one end of which is used to connect to the communication plug of the composite connector gun, and the other end of which is used to connect to the vehicle's battery management system.

17. A charging device, characterized in that, Includes a power module, a liquid cooling unit, and a composite connector gun as described in any one of claims 1 to 11, the composite connector gun being used to connect to the composite connector socket of the vehicle; The charging plug is connected to the power module, and the liquid supply plug and the liquid return plug are connected to the liquid cooling unit through pipelines; After the charging plug, the liquid supply plug, and the liquid return plug are successfully connected to the composite connector, the power module is used to output DC power to the vehicle's battery through the charging plug to charge the battery, the liquid cooling unit is used to output coolant to the vehicle's battery management system through the liquid supply plug to dissipate heat from the battery, and the liquid cooling unit is used to receive coolant output by the battery management system through the liquid return plug.

18. The charging device as claimed in claim 17, characterized in that, The liquid cooling unit includes a heat exchanger, a cold liquid tank, and a water pump. The liquid supply plug and the liquid return plug are connected to at least one of the heat exchanger and the cold liquid tank via the pipeline, wherein: The cold liquid tank is used to hold coolant; The heat exchanger is used to receive the coolant transmitted through the pipeline by the return plug; The water pump is used to drive the coolant to flow between the supply plug, the return plug, the heat exchanger, and the cold liquid tank.

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