A bottom charging device

Abstract

The application discloses a chassis type charging device, which comprises a vehicle end and a ground end arranged on a three-way moving end, and further comprises a conductive mechanism connected with a flexible cooling module, wherein the flexible cooling module comprises a flexible conductor and a circulating cooling unit; one of the ground end and the vehicle end is formed with a convex surface, and the other is formed with a recess; after the convex surface is inserted into the recess, the ground end and the vehicle end complete power supply through the conductive mechanism, and further comprise a positioning mechanism and a contact mechanism; the chassis type charging device is provided with annular butt joint mechanisms on the ground end and the vehicle end, so that the ground end can effectively guarantee butt joint effect when the ground end is butt jointed with the vehicle end; and corresponding annular positioning mechanisms and annular contact mechanisms are further arranged, a first tolerance area of the annular positioning mechanism and a second tolerance area of the annular contact mechanism also correspond to each other, and the multiple annular butt joint high tolerance settings enable the vehicle end and the ground end to accurately realize butt joint and complete charging operation.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicle technology, and in particular to a chassis-type charging device. Background Technology

[0002] As new energy vehicles develop towards high-power charging, autonomous driving, and vehicle-to-grid interaction, chassis-based automatic charging has become the core direction for charging heavy trucks, construction machinery, commercial vehicles, and ordinary passenger cars due to its space-saving design and suitability for the full-process automation requirements of unmanned driving.

[0003] However, most existing new energy vehicles have their automatic charging sockets installed on the side or rear of the vehicle, with the charging pile in a fixed position that cannot be adapted or moved. This results in a low level of automation and hinders convenient charging. While some new energy vehicles have charging sockets at the bottom of the vehicle, they haven't adequately considered situations where the vehicle is positioned for charging but there's a misalignment between the vehicle and the charging pile. This leads to inaccurate connection between the charging interface and the charging pile, and the lack of tolerance structures for the connection between the socket and the pile results in a high failure rate, hindering efficient and convenient charging. Summary of the Invention

[0004] Purpose of the invention: To provide a chassis-type charging device that enables docking and charging operations at the bottom of a vehicle, while also offering high fault tolerance, improved docking success rate, and charging efficiency.

[0005] Technical solution

[0006] A chassis-type charging device includes a vehicle end and a ground end disposed on a three-way mobile end, and also includes a conductive mechanism connected to a flexible cooling module, the flexible cooling module including a flexible conductor and a circulating cooling unit; One of the ground end and the vehicle end has a convex surface, and the other has a groove. When the convex surface is inserted into the groove, the ground end and the vehicle end are energized through the conductive mechanism. Also includes: The positioning mechanism includes a plurality of corresponding pins and slots, wherein the size of the pins is smaller than the size of the slots to form a first tolerance zone; The contact mechanism includes a plurality of corresponding communication electrodes and clips, wherein the clamping coverage area of ​​the clips is smaller than the clamping area of ​​the communication electrodes, so as to form a second tolerance zone. The first tolerance area and the second tolerance area are set accordingly. When the insert is inserted into any circumferential position in the first tolerance area, there is a corresponding clamping position in the second tolerance area for the clip to hold.

[0007] In some possible embodiments, the convex surface, the groove, the positioning mechanism, the contact mechanism, and the conductive mechanism are all arranged in a ring shape; The convex surface is formed on the ground end, and the groove is formed on the vehicle end; The communication electrode and the insertion post are both located on the ground end and are distributed at equal angles along the circumference of the convex surface. The clip and the slot are both located on the vehicle end and are distributed at equal angles along the circumference of the groove.

[0008] In a further embodiment, the conductive mechanism includes a first conductive component disposed at the vehicle end and a second conductive component disposed at the ground end; The first conductive component includes a machined positive electrode, a machined negative electrode, and at least two elastic contacts. The machined positive electrode and the machined negative electrode are respectively disposed on two corresponding surfaces of the groove, and the two elastic contacts are respectively disposed on the machined positive electrode and the machined negative electrode. The second conductive component includes a ground positive electrode and a ground negative electrode, which are respectively disposed on two corresponding sidewalls of the convex surface, and a plurality of the flexible conductors connect the ground positive electrode and the ground negative electrode. When the convex surface is inserted into the groove, the grounding positive electrode and the grounding negative electrode correspond to the vehicle-mounted positive electrode and the vehicle-mounted negative electrode, and the elastic contact is attached to the grounding positive electrode and the grounding negative electrode.

[0009] In a further embodiment, the machined positive electrode, the machined negative electrode, and the elastic contact are all coaxially arranged with the groove; Both the grounding positive electrode and the grounding negative electrode are coaxially arranged with the convex surface.

[0010] In a further embodiment, the circulating cooling unit includes a first circulating mechanism and a second circulating mechanism, wherein the first circulating mechanism is connected to a first circulating cavity opened on the inner side of the ground end, and the second circulating mechanism is connected to a second circulating cavity opened on the outer side of the ground end. Both the first circulation cavity and the second circulation cavity are coaxially arranged with the convex surface, and the first circulation cavity is close to the ground positive electrode plate, while the second circulation cavity is close to the ground negative electrode plate.

[0011] In a further embodiment, both the first circulation mechanism and the second circulation mechanism include a plurality of circulation channels corresponding to the number of the flexible conductors; The circulation pipe is sleeved on the outside of the flexible conductor, and a space is reserved between the inner wall of the circulation pipe and the outer wall of the flexible conductor for liquid to flow through, so that the liquid can enter and exit the first circulation chamber or the second circulation chamber through the space.

[0012] In a further embodiment, the ground end is connected to the three-way mobile end via a first elastic support module; The first elastic support module includes a support plate and several first springs. One side of the support plate is fixed to the three-way moving end, and the other side is connected to the ground end through several first springs. Several of the first springs are symmetrically arranged about the axis of the ground end.

[0013] In a further embodiment, the first elastic support module is further provided with a positioning and identification module, which is used to identify the position of the vehicle end and transmit the position information to the three-way mobile end, so that the three-way mobile end drives the ground end to complete the docking and charging with the vehicle end according to the position information; The positioning and identification module includes sensor components.

[0014] In a further embodiment, the vehicle end is connected to the vehicle body via a second elastic support module; The second elastic support module includes a connecting frame and several second springs. The connecting frame is disposed outside the vehicle end and fixedly connected to the vehicle body. A space is reserved between the connecting frame and the vehicle end for the second springs to connect. Several second springs are evenly distributed around the center of the vehicle end on the outside of the vehicle end.

[0015] In a further embodiment, the three-way moving end is disposed on a fixed plane or an automatic moving device.

[0016] The beneficial effects of this invention are as follows: By providing annular docking mechanisms on both the ground end and the vehicle end, the docking effect can be effectively guaranteed when the ground end docks with the vehicle end. Furthermore, corresponding annular positioning mechanisms and annular contact mechanisms are also provided. The first tolerance area of ​​the annular positioning mechanism and the second tolerance area of ​​the annular contact mechanism correspond to each other. This multi-ring docking with high fault tolerance allows the vehicle end and the ground end to accurately dock and complete the charging and discharging operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a frontal cross-sectional structural diagram of the vehicle end and the ground end of the present invention.

[0019] Figure 3 This is a top view of the ground end structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the vehicle-end top-view structure of the present invention.

[0021] Figure 5 This is a top view cross-sectional structural diagram of the second circulation mechanism at the ground end of the present invention.

[0022] Figure 6 This is a top view cross-sectional structural diagram of the first circulation mechanism at the ground end of the present invention.

[0023] Figure 7 This is a partial cross-sectional view of the docking structure between the ground end and the vehicle end of the present invention.

[0024] Figure 8 This is a top view schematic diagram of the docking structure between the ground end and the vehicle end of the present invention.

[0025] The attached figures are labeled as follows: end plate 100, groove 101, elastic contact 102, slot 103, clip 104, PE pole pin sleeve 105, positive electrode plate connected by the machine 106, negative electrode plate connected by the machine 107, ground end 200, convex surface 201, ground PE pin 202, insertion post 203, communication electrode plate 204, ground positive electrode plate 205, ground negative electrode plate 206, first circulation chamber 207, second circulation chamber 208, flexible conductor 209, first elastic support module 300, second elastic support module 400, three-way moving end 500, flexible cooling module 600, first circulation mechanism 601, second circulation mechanism 602, first water inlet assembly 603, first water outlet assembly 604, second water inlet assembly 605, second water outlet assembly 606, flow outer pipe 607, connector 608, positioning and identification module 700. Detailed Implementation

[0026] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1: Refer to Figure 1This embodiment discloses a chassis-type charging device, including a vehicle end 100, a ground end 200, and an annular conductive mechanism connected to a flexible cooling module 600. The vehicle end 100 is mounted on the vehicle body, and the ground end 200 is mounted on a three-way movable end 500. The three-way movable end 500 drives the ground end 200 to move, causing the ground end 200 to dock with the vehicle end 100. The three directions are x, y, and z directions. Specifically, refer to... Figure 1 The z-direction is the vertical axial direction, and xy is the front-back and left-right direction on the plane, respectively. The mounting bases at the vehicle end 100 and the ground end 200 are both made of 95% alumina ceramic and T2 copper composite molding.

[0029] The flexible cooling module 600 includes a flexible conductor 209 and a circulating cooling unit. Specifically, the flexible conductor 209 includes a cable, and is electrically connected to a conductive mechanism to achieve current transmission. The circulating cooling unit cools both the flexible conductor 209 and the conductive mechanism by transmitting a liquid cooling medium.

[0030] like Figure 2 and Figure 3 As shown, an annular convex surface 201 is formed on the ground end 200, and the annular convex surface 201 is a conical guide surface.

[0031] like Figure 2 and Figure 4 As shown, an annular groove 101 with an open end is formed on the vehicle end 100. When the annular convex surface 201 is axially engaged and inserted into the annular groove 101 from the opening, the ground end 200 and the vehicle end 100 complete the charging operation of the vehicle body through the annular conductive mechanism.

[0032] Specifically, the annular conductive mechanism includes a first conductive component located at the vehicle end 100 and a second conductive component located at the ground end 200.

[0033] like Figure 7 As shown, the first conductive component includes a machined positive electrode 106, a machined negative electrode 107, and at least two elastic contacts 102. The machined positive electrode 106 and the machined negative electrode 107 are respectively disposed on two corresponding annular surfaces of the groove 101, and the two elastic contacts 102 are respectively disposed on the machined positive electrode 106 and the machined negative electrode 107.

[0034] Specifically, the elastic contact 102 can be a finger spring, and the contact and disconnection of the circuit can be achieved by the elastic deformation of the finger spring.

[0035] like Figure 7As shown, the second conductive component includes a ground positive electrode 205 and a ground negative electrode 206. The ground positive electrode 205 and the ground negative electrode 206 are respectively disposed on two corresponding sidewalls of the convex surface 201, and a plurality of flexible conductors 209 connect the ground positive electrode 205 and the ground negative electrode 206.

[0036] When the convex surface 201 is inserted into the groove 101, the ground positive electrode 205 and the ground negative electrode 206 correspond to the vehicle-mounted positive electrode 106 and the vehicle-mounted negative electrode 107, and the elastic contact 102 is attached to the ground positive electrode 205 and the ground negative electrode 206. The flexible conductor 209 transmits current and realizes the charging and discharging of the vehicle end 100 and the ground end 200 through the positive and negative electrodes and the elastic contact 102.

[0037] Preferably, four elastic contacts 102 are provided, and they are arranged in pairs on the positive electrode plate 106 and the negative electrode plate 107 respectively, to improve the charging efficiency and effect. The positive and negative conductors are made of T2 high-purity copper and are processed by forging and milling.

[0038] Furthermore, the positive electrode 106, the negative electrode 107, and the elastic contact 102 are all coaxially arranged with the groove 101.

[0039] Both the grounding positive electrode 205 and the grounding negative electrode 206 are coaxially arranged with the convex surface 201. The coaxial structure allows the positive and negative electrodes to contact the elastic contact 102 as long as the annular convex surface 201 can be inserted into the annular groove 101, thus completing the charging and discharging operation, improving the fault tolerance and making the charging effect better.

[0040] The flexible conductor 209 is connected to the ground end 200 and supports V2G bidirectional charging and discharging functions. According to the grid dispatch instructions, the charging or discharging mode is selected, which is adapted to the 1500VDC / 2000A operating condition to realize bidirectional energy transmission of charging (3MW) and discharging (2MW) to meet the needs of vehicle-grid interactive dispatch.

[0041] Reference Figure 2 , Figure 3 and Figure 8 A ground PE needle 202 is provided on the ground end 200 at the axial position of the convex surface 201. The ground PE needle 202 is inserted into the PE pole needle sleeve 105 of the vehicle end 100. The PE pole needle sleeve 105 is located at the axial position of the groove 101.

[0042] Specifically, the charging device also includes an annular positioning mechanism and an annular contact mechanism. When the annular convex surface 201 is inserted into the annular groove 101 to complete the docking, the positioning mechanism and the contact mechanism are also docked one by one.

[0043] The positioning mechanism includes a plurality of corresponding pins 203 and slots 103. The outer circumferential dimension of the pins 203 is smaller than the inner circumferential dimension of the slots 103 to form a first tolerance zone in the circumferential direction. Specifically, the arc length of the slots 103 is greater than the diameter of the pins 203, and a first tolerance zone in the circumferential gap is formed between them.

[0044] The contact mechanism includes a plurality of corresponding communication electrodes 204 and clips 104. The clamping coverage area of ​​the clips 104 is smaller than the available clamping area of ​​the communication electrodes 204, so as to form a second tolerance zone in the circumferential direction.

[0045] Preferably, six communication electrodes 204 are arranged at equal angles of 60°, and six clips 104 are also arranged at equal angles of 15°. Therefore, the communication electrodes 204 have a second tolerance zone, which allows the clips 104 to be clamped onto the corresponding positions on the communication electrodes 204 in accordance with the positions of the inserts 203 within the first tolerance zone.

[0046] The communication electrode 204 and the insertion post 203 are both disposed on the ground end 200 and are distributed at equal angles along the circumference of the convex surface 201. The clip 104 and the slot 103 are both disposed on the vehicle end 100 and are distributed at equal angles along the circumference of the groove 101.

[0047] To achieve high tolerance, the first tolerance area and the second tolerance area are set accordingly. When the insertion post 203 is inserted into any circumferential position in the first tolerance area, there is a corresponding circumferential clamping position in the second tolerance area for the clip 104 to clamp.

[0048] The ground end 100 is connected to the three-way moving end 500 through the first elastic support module 300; the three-way moving end 500 enables bottom-up insertion, compensating for plane ±60° angle deviation, Z-axis 0-30mm vertical deviation, and XYZ three-axis ±15mm displacement deviation.

[0049] The first elastic support module 300 includes a support plate and a plurality of first springs. One side of the support plate is fixed to the three-way moving end 500, and the other side is connected to the ground end 200 through the plurality of first springs. Several first springs are symmetrically arranged about the axis of the ground end 200. Through the elastic support of the first springs, docking operations between the vehicle end and the ground end when they are not in a completely horizontal state can be achieved. When deviation occurs, the elastic support module can compensate for the deviation and ensure the docking position. Preferably, at least two first springs can be used.

[0050] The first elastic support module 300 is also provided with a positioning and identification module 700, which is used to identify the position of the vehicle end 100 and transmit the position information to the three-way mobile end 500, so that the three-way mobile end 500 drives the ground end 200 to complete the docking and charging with the vehicle end 100 according to the position information. Specifically, the positioning and identification module 700 can also be optionally installed on the support plate.

[0051] The positioning and identification module 700 includes a sensor assembly.

[0052] Specifically, the sensor components include a vision sensor, a distance sensor, and a detection sensor. Preferably, the vision sensor can be a 3D ToF camera, which acquires 100° images from the vehicle. The distance sensor can be a LiDAR, which performs distance scanning. The detection sensor can be an ultrasonic sensor, which detects obstacles. The logic chip fuses the data, and the SLAM algorithm generates an initial path. Combined with Kalman filtering, it dynamically compensates for positional offsets, achieving a positioning accuracy of ±2mm. It corrects positional offsets caused by vehicle suspension deformation and ground vibrations in real time, addressing interference from vehicle suspension deformation and ground vibrations.

[0053] Specifically, the 3D ToF camera captures high-definition images of the vehicle-side charging port (100) and sends them directly to the ground-side main control unit (200). After image processing, key features such as the interface center coordinates and pin distribution are extracted. The LiDAR specifically scans the relative distance between the vehicle-side port (100) and the ground-side unit (200), simultaneously collecting horizontal / vertical offset data. All distance information is uploaded to the main control unit in real time. The ground-side chip (200) retrieves raw data from all sensors from the main control unit and performs data calibration, noise filtering, and fusion processing through parallel computing to generate a comprehensive data packet containing positional deviation, angle error, and obstacle status. The SLAM algorithm calls this data packet, combines it with pre-stored map information of the parking space, and quickly generates a collision-free optimal docking path. It simultaneously outputs path planning instructions to the three-way mobile terminal (500), including movement direction, speed, and pause points. The three-way mobile terminal (500) starts according to the path planning instructions, receiving real-time feedback data from sensors during movement for dynamic correction, ultimately achieving precise alignment between the ground-side unit (200) and the vehicle-side port (100), with positioning accuracy controlled within ±2mm.

[0054] Furthermore, the vehicle end 100 is connected to the vehicle body via the second elastic support module 400.

[0055] The second elastic support module 400 includes a connecting frame and a plurality of second springs. The connecting frame is disposed outside the vehicle end 100 and fixedly connected to the vehicle body. A space is reserved between the connecting frame and the vehicle end 100 for the second springs to connect. Several second springs are evenly distributed at angles around the center of the vehicle end 100. Preferably, four second springs are provided to connect the vehicle end 100 and the vehicle body in four directions. Even if the vehicle body vibrates during movement, the vehicle end 100 can maintain its position under the action of the second springs, avoiding excessive deviation that would prevent it from docking with the ground end 200.

[0056] The autonomous vehicle schedules charging via network communication. After entering the designated parking space, the vehicle-side BMS (Battery Management System) 100 sends chassis interface location information via the CANFD bus. The three-way mobile terminal 500 operates, and the autonomous vehicle enters the charging area, communicating with the ground terminal 200 socket via a communication protocol. The ground terminal 200 positioning and identification module 700 activates, fusing positioning data through a chip, achieving a positioning error ≤0.3mm, and generating a docking path. The servo motors included in the three-way mobile terminal 500 drive the ground terminal 200 and the first elastic support module to move, compensating for the vehicle's ±60° planar angular deviation, 0-30mm vertical deviation in the Z direction, and ±15mm displacement deviation in the XYZ three directions. A ring-shaped contact mechanism inserts into a 30mm deep contact area, achieving reliable connection of DC+ / DC-, A+ / A-, etc. contact pairs, with a docking response time ≤60s. Based on the power grid dispatch instructions, the charging or discharging mode is selected. The charging system starts, outputting 1500VDC / 2000A current.

[0057] Furthermore, to protect the vehicle end 100 and prevent debris from damaging it during movement, a protective component is installed on the vehicle body. Preferably, the protective component is connected to the side of the vehicle end 100 facing the ground end 200. The protective component includes a protective cover and a driving component, which drives the protective cover to switch between a first state and a second state. When the protective cover is in the first state, it covers the mating surface of the vehicle end 100. When the protective cover is in the second state, it moves away, allowing the vehicle end 100 to connect to the ground end 200 without obstruction.

[0058] Example 2: Based on Example 1, this example discloses a chassis-type charging device, wherein the circulating cooling unit includes a first circulating mechanism 601 and a second circulating mechanism 602, as follows: Figure 6As shown, the first circulation mechanism 601 is connected to the first circulation cavity 207 opened inside the ground end 200, as... Figure 5 As shown, the second circulation mechanism 602 is connected to the second circulation cavity 208 opened on the outside of the ground end 200. The two circulation mechanisms and the two circulation cavities respectively cool the grounded positive electrode 205 and the grounded negative electrode 206.

[0059] Both the first circulation chamber 207 and the second circulation chamber 208 are coaxially arranged with the convex surface 201. The first circulation chamber 207 is close to the ground positive electrode 205, and the second circulation chamber 208 is close to the ground negative electrode 206. The two sets of circulation mechanisms are arranged in conjunction with the positions of the circulation chambers so that the ground end 200 can be effectively cooled during the charging and discharging operation, thereby improving the safety of the charging and discharging process.

[0060] The first circulation mechanism 601 and the second circulation mechanism 602 both include a plurality of circulation channels corresponding to the number of the flexible conductors 209.

[0061] Reference Figure 7 The circulation pipe is sleeved on the outside of the flexible conductor 209. A space is reserved between the inner wall of the circulation pipe and the outer wall of the flexible conductor 209 for liquid flow, allowing liquid to enter and exit the first circulation chamber 207 or the second circulation chamber 208 through this space. The liquid can cool the ground end 200 while flowing through the circulation chamber, and also cool the flexible conductor 209 while circulating in the space. A silicone oil solution can be selected as the liquid cooling medium.

[0062] Specifically, the first circulation mechanism 601 includes a first water inlet component 603 and a first water outlet component 604, the second circulation mechanism 602 includes a second water inlet component 605 and a second water outlet component 606, and the circulation pipe is a flow outer pipe 607. The first water inlet component 603, the first water outlet component 604, the second water inlet component 605, and the second water outlet component 606 all include a flow outer pipe 607. Furthermore, in order to ensure that the flexible conductor 209 is energized while also meeting the water transmission requirements of the flow outer pipe 607, the first water inlet component 603, the first water outlet component 604, the second water inlet component 605, and the second water outlet component 606 all also include a connector 608. The connector 608 connects the positive and negative electrode plates and the flexible conductor 209 respectively. The connector 608 has a groove that connects the cavity and the space, thereby realizing the flow of liquid. The cable features a multi-strand fine copper wire flexible design and a high-temperature resistant silicone cooling outer tube 607. The cable and the outer tube 607 bend synchronously, with the minimum bending radius of the cable being only 3-8 times its diameter, allowing for flexible installation.

[0063] The charging system starts, outputting a 1500VDC / 2000A current. The liquid cooling system starts simultaneously, connected to the flexible cooling module 600. The variable frequency cold source outputs solution, which enters the double vortex channel of the ground end 200 through the flow channel connector 608. After cooling the ground positive electrode 205 and ground negative electrode 206, it flows through the immersion cable liquid cooling channel and finally returns to the cold source. The maximum temperature rise of the interface is ≤50℃. The ceramic-metal composite insulation component ensures an insulation strength of 1200MΩ, and the elastic contact 102 maintains contact pressure (contact resistance ≤0.05mΩ), with no electric arc generated. After charging is completed, the three-way moving end 500 drives the ground end 200 to retract, and the vehicle leaves the charging area. The liquid cooling system shuts down after a 30-second delay to ensure that residual heat is completely discharged.

[0064] Example 3: Based on Example 1, this example discloses a chassis-type charging device, wherein the three-way moving end 500 is disposed on a fixed plane; the fixed plane includes the ground.

[0065] Example 4: Based on Example 1, this example discloses a chassis-type charging device, wherein the three-way moving end 500 is disposed on an automatic moving device; the automatic moving device includes an AGV mobile trolley.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0067] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A chassis-type charging device, comprising a vehicle end and a ground end disposed on a three-way movable end, characterized in that: It also includes a conductive mechanism connected to the flexible cooling module, which includes a flexible conductor and a circulating cooling unit; One of the ground end and the vehicle end has a convex surface, and the other has a groove. When the convex surface is inserted into the groove, the ground end and the vehicle end are energized through the conductive mechanism. Also includes: The positioning mechanism includes a plurality of corresponding pins and slots, wherein the size of the pins is smaller than the size of the slots to form a first tolerance zone; The contact mechanism includes a plurality of corresponding communication electrodes and clips, wherein the clamping coverage area of ​​the clips is smaller than the clamping area of ​​the communication electrodes, so as to form a second tolerance zone. The first tolerance area and the second tolerance area are set accordingly. When the insert is inserted into any position in the first tolerance area, there is a corresponding clamping position in the second tolerance area for the clip to hold. The convex surface, the groove, the positioning mechanism, the contact mechanism, and the conductive mechanism are all arranged in a ring shape; The convex surface is formed on the ground end, and the groove is formed on the vehicle end; The communication electrode and the insertion post are both located on the ground end and are distributed at equal angles along the circumference of the convex surface. The clip and the slot are both located on the vehicle end and are distributed at equal angles along the circumference of the groove.

2. The chassis-type charging device according to claim 1, characterized in that: The conductive mechanism includes a first conductive component disposed at the end of the vehicle and a second conductive component disposed at the end of the ground; The first conductive component includes a machined positive electrode, a machined negative electrode, and at least two elastic contacts. The machined positive electrode and the machined negative electrode are respectively disposed on two corresponding surfaces of the groove, and the two elastic contacts are respectively disposed on the machined positive electrode and the machined negative electrode. The second conductive component includes a ground positive electrode and a ground negative electrode, which are respectively disposed on two corresponding sidewalls of the convex surface, and a plurality of the flexible conductors connect the ground positive electrode and the ground negative electrode. When the convex surface is inserted into the groove, the grounding positive electrode and the grounding negative electrode correspond to the vehicle-mounted positive electrode and the vehicle-mounted negative electrode, and the elastic contact is attached to the grounding positive electrode and the grounding negative electrode.

3. The chassis-type charging device according to claim 2, characterized in that: The positive electrode plate, the negative electrode plate, and the elastic contact are all coaxially arranged with the groove. Both the grounding positive electrode and the grounding negative electrode are coaxially arranged with the convex surface.

4. A chassis-type charging device according to claim 3, characterized in that: The circulating cooling unit includes a first circulating mechanism and a second circulating mechanism. The first circulating mechanism is connected to a first circulating cavity opened on the inner side of the ground end, and the second circulating mechanism is connected to a second circulating cavity opened on the outer side of the ground end. Both the first circulation cavity and the second circulation cavity are coaxially arranged with the convex surface, and the first circulation cavity is close to the ground positive electrode plate, while the second circulation cavity is close to the ground negative electrode plate.

5. A chassis-type charging device according to claim 4, characterized in that: Both the first and second circulation mechanisms include a plurality of circulation channels corresponding to the number of the flexible conductors; The circulation pipe is sleeved on the outside of the flexible conductor, and a space is reserved between the inner wall of the circulation pipe and the outer wall of the flexible conductor for liquid to flow through, so that the liquid can enter and exit the first circulation chamber or the second circulation chamber through the space.

6. A chassis-type charging device according to claim 1, characterized in that: The ground end is connected to the three-way mobile end via a first elastic support module; The first elastic support module includes a support plate and several first springs. One side of the support plate is fixed to the three-way moving end, and the other side is connected to the ground end through several first springs. Several of the first springs are symmetrically arranged about the axis of the ground end.

7. A chassis-type charging device according to claim 6, characterized in that: The first elastic support module is also provided with a positioning and identification module, which is used to identify the position of the vehicle end and transmit the position information to the three-way mobile terminal, so that the three-way mobile terminal drives the ground end to complete the docking and charging with the vehicle end according to the position information; The positioning and identification module includes sensor components.

8. A chassis-type charging device according to claim 1, characterized in that: The vehicle end is connected to the vehicle body via a second elastic support module; The second elastic support module includes a connecting frame and several second springs. The connecting frame is disposed outside the vehicle end and fixedly connected to the vehicle body. A space is reserved between the connecting frame and the vehicle end for the second springs to connect. Several second springs are evenly distributed around the center of the vehicle end on the outside of the vehicle end.

9. A chassis-type charging device according to claim 1, characterized in that: The three-way moving end is mounted on a fixed plane or an automatic moving device.

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