Metering and separable direct current charging gun

Abstract

The invention provides a measurable and separable direct current charging gun, and belongs to the technical field of charging guns. A mounting cavity, a plunger head and a connecting cavity are arranged in the charging gun body, and a first step part and a first wiring terminal are arranged on the plunger head; the metering module is positioned in the mounting cavity; one end of the connector is connected with a cable, the other end of the connector is provided with a second step part and a second wiring terminal, and when the connector is inserted into the connecting cavity, the first step part is inserted into the second step part, and the second wiring terminal and the first wiring terminal form male and female insertion fit; the rotary cover is provided with a first through groove, the rotary cover is detachably connected to the connecting cavity, and the structure, inserted into the connecting cavity, on the connector is locked in the connecting cavity or unlocked through rotation of the rotary cover. According to the charging gun, the gun body of the charging gun and the connector provided with the cable are of a separable structure, so that calibration of the metering module and maintenance of the charging gun are facilitated, and in addition, the creepage and insulation problems of the charging gun are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging guns, and relates to a DC charging gun, in particular to a metering and separable DC charging gun. Background Art

[0002] Electric vehicle charging piles are the most basic power facilities for electric vehicle charging. The current metering device is installed inside the electric vehicle charging pile, resulting in a relatively long cable between the metering device and the charging gun. Due to cable losses, the metered power consumption is large, affecting the final metering result.

[0003] Patent application CN202010167614.4 discloses a charging gun with charging control and metering functions, which installs a metering module on the charging gun to exclude the power loss on the cable from the metering module and improve metering accuracy.

[0004] In actual use, after the charging gun has been used for a period of time, the metering module needs to be calibrated and the charging gun needs to be maintained. According to the charging guns disclosed in the prior art, since one end of the cable is connected to the charging pile and the other end is integrally arranged with the charging gun body, when calibrating the metering module and maintaining the charging gun, the entire charging gun needs to be disassembled from the charging pile. At this time, the charging pile needs to be opened and a series of operations are required to complete the disassembly of the charging gun, which is rather troublesome and has low work efficiency. In addition, the voltage of the DC charging gun is different from that of the AC charging gun. Among them, the rated voltage of the AC charging gun is 220V, while the DC charging gun is generally 1000V because it is used for fast charging programs, which belongs to high voltage. Therefore, insulation and creepage phenomena also need to be considered in the DC charging gun. Summary of the Invention

[0005] The object of the present invention is to address the above problems in the existing technology and propose a DC charging gun that is convenient for calibrating the metering module, maintaining, has high-precision metering, and avoids creepage phenomena.

[0006] The object of the present invention can be achieved by the following technical solutions: A metering and separable DC charging gun, comprising:

[0007] A charging gun body provided with a hollow interior, and the internal space of the charging gun body is divided into an installation cavity and a connection cavity along its axial direction by a plunger head. A first stepped portion is provided on the side of the plunger head facing the connection cavity, and a first wiring terminal is provided on the plunger head. The first end of the first wiring terminal is located in the installation cavity and extends out of the installation cavity along the length direction of the installation cavity, and the second end of the first wiring terminal is located in the connection cavity;

[0008] The metering module is located in the installation cavity. The power consumption data measured by the metering module is displayed on the charging gun body or on the charging pile.

[0009] The connector has a cable connected to one end and electrically connected to the charging pile, and a second terminal is provided at the other end. A second stepped portion is provided on the end face where the second terminal is located. When the connector is inserted into the connection cavity, the second stepped portion is inserted and matched with the first stepped portion, and the second terminal and the first terminal form a male-female plug-in connection to complete the electrical connection between the connector and the charging gun body.

[0010] The rotary cover is provided with a first through groove for the cable to pass through, and the rotary cover is detachably connected to the connection cavity. By rotating the rotary cover, the structure of the connector inserted into the connection cavity is locked in the connection cavity or unlocked.

[0011] In the above-mentioned metering and separable DC charging gun, the first stepped portion includes a cavity, and a plurality of pits with different depths are provided on the bottom of the cavity. At least one first jack matching the terminal in the first terminal is provided in each pit; the second stepped portion includes a convex disk, and a plurality of convex blocks with different thicknesses are provided on the convex disk. At least one second jack matching the terminal in the second terminal is provided on each convex block. When the connector is inserted and matched with the charging gun body, the pits are inserted and matched with the corresponding convex blocks.

[0012] In the above-mentioned metering and separable DC charging gun, the connection cavity includes a connection cavity opening, a connection cavity wall, and a connection cavity bottom. The first end of the first terminal penetrates the connection cavity bottom and extends into the installation cavity, and extends along the length direction of the installation cavity. The second end of the first terminal is located in the connection cavity and extends towards the connection cavity opening. A first locking portion is provided on the connection cavity wall; the two ends along the axis direction of the rotary cover are respectively a second locking portion and a trigger portion. When the second locking portion is inserted at the connection cavity opening, the trigger portion is located outside the connection cavity. By rotating the trigger portion, the locking or unlocking between the second locking portion and the first locking portion is completed.

[0013] In the above-mentioned metering and separable DC charging gun, a concave cavity is provided on the second locking portion, and the axis of the concave cavity is coaxially arranged with the axis of the first through groove. The concave cavity includes a concave cavity bottom and a concave cavity opening. The first through groove penetrates the concave cavity bottom and extends towards the concave cavity opening. The diameter of the first through groove is smaller than the circumferential diameter of the concave cavity. When the second locking portion is inserted at the connection cavity opening, the end of the connector provided with the cable abuts against the concave cavity bottom.

[0014] In the above-mentioned measurable and separable DC charging gun, the first locking portion includes a guiding groove and a locking groove that are located on the wall of the connection cavity and communicate with each other. The extending direction of the guiding groove is consistent with the inserting direction of the rotary cap, and the extending direction of the locking groove is consistent with the rotating direction of the rotary cap. Among them, the second locking portion is slidably engaged with the guiding groove, and the second locking portion is rotatably engaged with the locking groove.

[0015] In the above-mentioned measurable and separable DC charging gun, the charging gun body includes an adapter, and the adapter is connected to the opening of the connection cavity through a fastener. Among them, the adapter is provided with a second through groove along the axial direction, and the second locking portion is arranged on the wall of the second through groove.

[0016] In the above-mentioned measurable and separable DC charging gun, the adapter includes a first convex ring and a first convex platform that are connected to each other, and the diameter of the first convex ring is larger than the diameter of the first convex platform. Among them, the second through groove penetrates through the first convex ring and the first convex platform, and the first locking portion is arranged on the first convex platform.

[0017] In the above-mentioned measurable and separable DC charging gun, the rotary cap includes a second convex ring. Second convex platforms and third convex platforms are respectively arranged at both ends along the axial direction of the second convex ring. The second locking portion and the concave cavity are arranged on the second convex platform, and the third convex platform serves as a trigger portion. Among them, the first through groove sequentially penetrates through the third convex platform, the second convex ring, and the second convex platform along the axial direction. When the second convex platform is inserted and engaged with the second through groove, the second convex ring abuts against the first convex ring.

[0018] In the above-mentioned measurable and separable DC charging gun, a step is arranged at the opening of the connection cavity, and the step forms an abutment with the first convex ring. Among them, the sum of the thicknesses of the first convex ring and the second convex ring is not greater than the distance between the side of the step in contact with the first convex ring and the plane where the opening of the connection cavity is located.

[0019] In the above-mentioned measurable and separable DC charging gun, a first sealing member is arranged between the first convex platform and the step. When the connector is inserted into the connection cavity, it is nested and connected with the first sealing member. Among them, multiple first flanges are arranged on the outer peripheral surface of the first sealing member, and the multiple first flanges are distributed along the axial direction of the first sealing member.

[0020] In the above-mentioned measurable and separable DC charging gun, the connector includes:

[0021] A housing, on which a first end face, a second end face, and a third through groove for the cable to run along the axial direction of the housing are arranged. Among them, the third through groove penetrates through the first end face, the second wiring terminal penetrates through the second end face, and the cable is connected to the second wiring terminal;

[0022] An anti-disconnection module, which is located inside the housing, and the anti-disconnection module includes:

[0023] A snap ring is clamped on the cable and is close to one end connected to the second terminal. Through the deformation of the snap ring, there are at least three contact areas between the inner wall of the snap ring and the outer wall of the cable. The mutual sliding between the snap ring and the cable along the axial direction is defined by the contact areas.

[0024] A limiting member is nested on the cable and is located between the snap ring and the first end face. Along the two sides of the axial direction of the limiting member are a first limiting portion and a second limiting portion respectively. Among them, the first limiting portion is in abutting cooperation with the snap ring, the second limiting portion is in abutting cooperation with the first end face, and the maximum edge diameter of the limiting member is greater than the diameter of the third through groove and less than the maximum diameter of the first end face.

[0025] In the above-mentioned metering and separable DC charging gun, the contact area between the inner wall of the deformed snap ring and the outer wall of the cable is line-surface contact or surface-surface contact.

[0026] In the above-mentioned metering and separable DC charging gun, an anti-twist portion is further provided on the first limiting portion of the limiting member, and the anti-twist portion is nested and matched with the snap ring. Among them, there is at least one limiting plane on the inner peripheral surface of the anti-twist portion in surface-surface contact with the outer peripheral surface of the snap ring.

[0027] In the above-mentioned metering and separable DC charging gun, a second sealing member is provided between the limiting member and the first end face, and the second sealing member is nested and matched with the cable. Among them, the two sides of the second sealing member along the axial direction are respectively abutted against the limiting member and the first end face. Multiple second flanges are provided on the outer peripheral surface of the second sealing member, and the multiple second flanges are distributed along the axial direction of the second sealing member.

[0028] In the above-mentioned metering and separable DC charging gun, at least two positioning plates are further provided in the connector. Between the two positioning plates and between the positioning plates and the housing, multiple positioning holes are formed along the axial direction. Among them, the second terminal includes multiple wiring ends, the multiple wiring ends are connected to the cable, and the multiple wiring ends are correspondingly inserted into the multiple positioning holes.

[0029] In the above-mentioned metering and separable DC charging gun, the housing includes a separable outer shell and an end cover. The outer shell is hollow, and a third through groove for the cable to pass through is provided on the end cover. Among them, the first end face is provided on the end cover, the second end face is provided on the outer shell, and a detachable structure is provided between the outer shell and the end cover. A part of the detachable structure is provided on the side wall of the outer shell, and another part of the detachable structure is provided on the side wall of the end cover.

[0030] In the above-mentioned metering and separable DC charging gun, the charging gun body includes a gun body, and a handle is provided on the gun body. Among them, the handle is hollow.

[0031] In the above-mentioned metering and separable DC charging gun, the metering module is used to calculate the bidirectional flowing electric quantity between the charging pile and the electric vehicle load; the metering module at least includes:

[0032] A collection circuit configured to obtain the electrical parameter signals flowing through the cable;

[0033] A calculation circuit configured to calculate the corresponding electrical parameter values according to the obtained electrical parameter signals;

[0034] A control circuit configured to output corresponding control signals according to the instruction signals of the terminal or the electrical parameter values calculated by the calculation circuit, and send the electrical parameter values and the position information of the charging gun body to the terminal at regular intervals;

[0035] A communication circuit configured to wirelessly send the electrical parameter values and the position data of the charging gun body to the terminal that has established a data connection with the charging gun body, and enable the terminal to determine the positioning information of the charging and discharging gun head device.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] (1) For the metering and separable DC charging gun provided by the present invention, since the charging gun body and the connector provided with the cable are of a separable structure, it is convenient to disassemble, calibrate and maintain the charging gun body with the metering module, thus ensuring the accurate metering of the metering module;

[0038] (2) A first stepped portion is provided on the plunger head, and a second stepped portion is provided on the end face where the second wiring terminal is located. When the connector and the charging gun body are in plug-in fit, multiple wiring terminals in the first wiring terminal on the first stepped portion are in plug-in fit with multiple wiring terminals in the second wiring terminal on the second stepped portion, and the end faces of the formed multiple groups of wiring terminals are in different vertical planes along the axial direction, so that there is a height difference between the end faces of adjacent two groups of wiring terminals, thereby avoiding the occurrence of creepage phenomenon and improving the safety of using the DC charging gun;

[0039] (3) The number of pits corresponds to the number of corresponding bumps, and the depth of the pits corresponds to the thickness of the corresponding bumps. Through the cooperation between the pits and the bumps, and the cooperation between the cavity and the convex disc, not only the creepage problem is solved, but also it can be used as a positioning structure when the first wiring terminal and the second wiring terminal are connected, improving the assembly efficiency and insulation effect between the connector and the charging gun body;

[0040] (4) Since the trigger part is located outside the connection cavity, it is convenient for the staff to rotate the rotary cap without tools, thereby restricting the movement of the connector along the axial direction after the connector and the charging gun body are electrically connected, and releasing the axial limit of the connector, realizing the detachable separation of the connector and the charging gun body;

[0041] (5) A concave cavity is provided on the second locking part. On the one hand, when the connector and the charging gun body are electrically connected, the connector can be clamped between the bottom of the connection cavity and the bottom of the concave cavity, not only realizing the axial limit of the connector in the connection cavity, but also improving the reliability of the electrical connection between the connector and the charging gun body, preventing loosening between the two. On the other hand, since one end of the cable is inserted into the concave cavity on the connector, the radial freedom of the connector is restricted, avoiding the connector shaking in the connection cavity during the movement of the charging gun. In addition, when the charging gun body needs to be separated from the connector, since the diameter of the first through groove is smaller than the circumferential diameter of the concave cavity, the rotary cap unscrewed from the opening of the connection cavity can always be sleeved on the cable until the connector is plugged into the corresponding charging gun body again, and then it can be locked by the rotary cap, avoiding the loss of the rotary cap;

[0042] (6) By providing a guide groove, when the rotary cap is inserted from the opening of the connection cavity, it can move along a preset trajectory, ensuring that the second locking part can be reliably inserted into the locking groove during the subsequent rotation process, improving the disassembly and assembly efficiency, and also avoiding damage to the second locking part;

[0043] (7) By providing an adapter, the guide groove and the locking groove originally required to be opened on the cavity wall of the connection cavity are transferred to the wall of the second through groove of the adapter. The adapter is an independent structure, so it is convenient to open the guide groove and the locking groove on the wall of the second through groove of the adapter, reducing the grooving process;

[0044] (8) By providing a step, it can not only be used as a positioning structure when the adapter is connected to the connection cavity, but also make the diameter of the cavity wall of the connection cavity smaller than the diameter of the opening of the connection cavity, thereby further blocking moisture or dust from entering the connection cavity;

[0045] (9) Since the sum of the thicknesses of the first convex ring and the second convex ring is not greater than the distance between the side of the step in contact with the first convex ring and the plane where the opening of the connection cavity is located, the side of the second convex ring connected to the third convex platform is indented into the opening of the connection cavity, thereby further restricting the shaking of the rotary cap during rotation and the shaking of the charging gun during movement, improving the connection reliability between the first locking part and the second locking part;

[0046] (10) By providing multiple first flanges on the inner peripheral surface of the first seal, and the first seal is generally made of a flexible material. When the connector is inserted into the first seal, the first flanges on the first seal will be squeezed and deformed, thereby increasing the frictional force between the first seal and the connector, and further improving the waterproof and dustproof effects.

[0047] (11) Through the cooperation between the snap ring and the cable, an integral structure is formed between the snap ring and the cable, and there is no relative slip between them. By the abutment of the limiting member with the snap ring and the first end face, the degree of freedom of the snap ring in the axial direction is limited, and then the degree of freedom of the cable in the axial direction is limited, realizing the anti-disconnection function of the cable.

[0048] (12) By providing the second seal, the relative distance between the snap ring and the first end face is increased, and the second seal has a certain strength, which can further realize the anti-disconnection function of the cable. By providing multiple second flanges on the outer peripheral surface of the second seal, and the second seal is generally made of a flexible material. When the second seal is inserted into the shell, the second flanges on the second seal will be squeezed and deformed, thereby increasing the frictional force between the second seal and the inner wall of the shell. On the one hand, it can further improve the waterproof and dustproof effects, and on the other hand, it can improve the anti-disconnection ability of the second seal, thereby further indirectly improving the anti-disconnection ability of the cable.

[0049] (13) By providing the positioning plate, on the one hand, it facilitates the rapid assembly of the second terminal, and ensures that the angle and gap between any two adjacent terminals are constant. On the other hand, when the connector is inserted and removed, the second terminal will not shake in the connector, improving the plugging and electrical connection effects. Thirdly, since the material of the positioning plate is an insulating material, it can achieve a good insulating effect. Description of the Drawings

[0050] Figure 1 is a schematic structural diagram of a metering and separable DC charging gun according to the present invention.

[0051] Figure 2 is Figure 1 a schematic structural diagram of another view of the DC gun shown.

[0052] Figure 3 is Figure 2 a sectional view taken along the cutting line A-A in the middle.

[0053] Figure 4 is Figure 1 a schematic partial structural diagram of the DC gun shown.

[0054] Figure 5 is Figure 4 a schematic partial structural diagram of another view of the one shown.

[0055] Figure 6 is Figure 5 a sectional view along cutting line B-B.

[0056] Figure 7 is a schematic structural view of the charging gun body in the present invention.

[0057] Figure 8 is a schematic structural view of the connector in the present invention.

[0058] Figure 9 is Figure 8 a schematic structural view of the connector shown from another perspective.

[0059] Figure 10 is Figure 9 a sectional view along cutting line C-C.

[0060] Figure 11 is Figure 8 a schematic partial structural view of the connector shown.

[0061] Figure 12 is a schematic structural view of the plunger head in the present invention.

[0062] Figure 13 is a schematic structural view of the end of the housing in the present invention.

[0063] Figure 14 is a schematic structural view of the connecting member in the present invention.

[0064] Figure 15 is a schematic structural view of the screw cap in the present invention.

[0065] Figure 16 is Figure 15 a schematic structural view of the screw cap shown from another perspective.

[0066] Figure 17 is Figure 16 a sectional view along cutting line D-D.

[0067] Figure 18 is a block diagram of the metering module in the present invention.

[0068] In the figure,

[0069] 100, charging gun body; 110, plunger head; 111, cavity; 112, pit; 113, first jack; 120, installation cavity; 130, connection cavity; 131, connection cavity opening; 132, connection cavity wall; 133, connection cavity bottom; 134, step; 135, second connection hole; 140, first terminal; 150, adapter; 151, guide groove; 152, locking groove; 153, second through groove; 154, first convex ring; 155, first boss; 156, first connection hole; 160, first seal; 161, first flange; 170, gun body; 171, handle;

[0070] 200, metering module;

[0071] 300, connector; 310, cable; 320, second terminal; 340, housing; 341, first end face; 342, second end face; 343, third through groove; 344, outer shell; 3441, clamping block; 3442, convex disc; 3443, convex block; 3444, second jack; 345, end cap; 3451, card slot; 350, anti-disengagement module; 351, snap ring; 3511, contact area; 352, limiting member; 3521, first limiting portion; 3522, second limiting portion; 3523, anti-twisting portion; 353, second seal; 3531, second flange; 360, positioning plate; 361, positioning hole;

[0072] 400, screw cap; 410, first through groove; 420, concave cavity; 421, concave cavity bottom; 422, concave cavity opening; 430, second convex ring; 440, second boss; 450, third boss; 460, locking block. Detailed implementation manners

[0073] The following are specific embodiments of the present invention and, in conjunction with the accompanying drawings, further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0074] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0075] As Figures 1 to 18 shown, a metering and separable DC charging gun provided by the present invention includes:

[0076] The charging gun body 100 is provided with a hollow structure, and the internal space of the charging gun body 100 is divided into an installation cavity 120 and a connection cavity 130 along the axial direction thereof by a plunger head 110. A first stepped portion is provided on one side of the plunger head 110 facing the connection cavity 130, and a first wiring terminal 140 is provided on the plunger head 110. The first end of the first wiring terminal 140 is located in the installation cavity 120 and extends out of the installation cavity 120 along the length direction of the installation cavity 120, and the second end of the first wiring terminal 140 is located in the connection cavity 130;

[0077] A metering module 200, located in the installation cavity 120, and the power data measured by the metering module 200 is displayed on the charging gun body 100 or on the charging pile;

[0078] A connector 300, one end of which is connected with a cable 310 electrically connected to the charging pile, and the other end is provided with a second wiring terminal 320. A second stepped portion is provided on the end face where the second wiring terminal 320 is located. Among them, when the connector 300 is inserted into the connection cavity 130, the second stepped portion is inserted and matched with the first stepped portion, and the second wiring terminal 320 and the first wiring terminal 140 form a male-female plug-in connection to complete the electrical connection between the connector 300 and the charging gun body 100;

[0079] A rotary cover 400, on which a first through groove 410 for the cable 310 to pass through is provided, and the rotary cover 400 is detachably connected to the connection cavity 130. By rotating the rotary cover 400, the structure of the connector 300 inserted into the connection cavity 130 is locked in the connection cavity 130 or unlocked.

[0080] It is worth mentioning that by rotating the rotary cover 400, the structure of the connector 300 inserted into the connection cavity 130 is locked in the connection cavity 130. At this time, when the charging gun is plugged and electrically connected to the charging port of the electric vehicle, the electric vehicle can be charged, and the charging power can be reflected on the charging gun in real time or on the charging pile; when it is necessary to calibrate the metering module 200 in the charging gun or when maintenance of the charging gun is required, reverse the rotary cover 400 and remove the rotary cover 400 from the connection cavity 130. At this time, the connector 300 can be pulled out of the connection cavity 130 to realize the separation between the charging gun body 100 and the connector 300, so as to facilitate the staff to directly carry the charging gun body 100 to the calibration location or the maintenance location for calibration or maintenance, and the operation is convenient and reliable.

[0081] A metering and separable DC charging gun provided by the present invention, because the charging gun body 100 and the connector 300 provided with the cable 310 are of a separable structure, it is convenient to disassemble, calibrate and maintain the charging gun body 100 with the metering module 200, so as to ensure the accurate metering of the metering module 200.

[0082] It is worth mentioning that for a charging gun similar to those disclosed in the background art, since the charging gun and the cable 310 are of an integrated structure, although the metering module 200 is arranged inside the charging gun, which improves the metering accuracy, when the metering module 200 inside the charging gun needs to be calibrated and the charging gun needs to be maintained, generally two methods are adopted. One is to disassemble the charging gun together with the cable 310 from the charging pile and then go to the calibration location or the maintenance location for calibration and maintenance, but the disassembly and assembly are not convenient. The other is to directly take the charging gun, the cable 310 and the charging pile to the calibration location or the maintenance location for calibration and maintenance, but the charging pile is relatively large in size, heavy and inconvenient to carry.

[0083] Therefore, whether method one or method two is adopted, it is not convenient for the calibration of the metering module 200 and the maintenance of the charging gun. Therefore, it is possible that the calibration of the metering module 200 and the maintenance of the charging gun are not carried out for a long time, or the number of calibrations of the metering module 200 and the number of maintenance of the charging gun are reduced. This may lead to, on the one hand, the metering accuracy being reduced due to the metering module 200 not being calibrated for a long time, which is not beneficial to consumers, and on the other hand, the service life of the charging gun being reduced due to the charging gun not being maintained for a long time. Therefore, the charging gun of the present invention can avoid the slackness of reducing the number of calibrations of the metering module 200 and the number of maintenance of the charging gun, ensure the reliability and accuracy of the metering module 200 during metering detection, and extend the service life of the charging gun.

[0084] In addition, a first stepped portion is provided on the plunger head 110, and a second stepped portion is provided on the end face where the second wiring terminal 320 is located. When the connector 300 is in plug-in fit with the charging gun body 100, a plurality of terminals in the first wiring terminal 140 on the first stepped portion are in plug-in fit with a plurality of terminals in the second wiring terminal 320 on the second stepped portion, and the end faces of the formed multi-group of terminals are in different vertical planes along the axial direction, so that there is a height difference between the end faces of adjacent two groups of terminals, thereby avoiding the occurrence of creepage phenomenon and improving the safety of using the DC charging gun.

[0085] It is further pointed out that both the plunger head 110 and the end where the second wiring terminal 320 is located are made of insulating materials, thus having good insulation effects.

[0086] It is further pointed out that the first stepped portion includes a cavity 111, and a plurality of pits 112 with different depths are provided on the bottom of the cavity 111. At least one first socket 113 that cooperates with the terminals in the first terminal 140 is provided in each pit 112. The second stepped portion includes a convex disk 3442, and a plurality of protrusions 3443 with different thicknesses are provided on the convex disk 3442. At least one second socket 3444 that cooperates with the terminals in the second terminal is provided on each protrusion 3443. When the connector 300 is plugged and matched with the charging gun body 100, the pits 112 are plugged and matched with the corresponding protrusions 3443.

[0087] In this embodiment, the number of pits 112 corresponds to the number of the corresponding protrusions 3443, and the depth of the pits 112 corresponds to the thickness of the corresponding protrusions 3443. Through the cooperation between the pits 112 and the protrusions 3443, and the cooperation between the cavity 111 and the convex disk 3442, not only the creepage problem is solved, but also it can be used as a positioning structure when the first terminal 140 is connected to the second terminal 320, improving the assembly efficiency and insulation effect between the connector 300 and the charging gun body 100.

[0088] Preferably, the connection cavity 130 includes a connection cavity opening 131, a connection cavity wall 132, and a connection cavity bottom 133. The first end of the first terminal 140 penetrates the connection cavity bottom 133 and extends into the installation cavity 120, and extends along the length direction of the installation cavity 120. The second end of the first terminal 140 is located in the connection cavity 130 and extends towards the connection cavity opening 131. A first locking portion is provided on the connection cavity wall 132. The two ends along the axis direction of the rotary cover 400 are respectively a second locking portion and a trigger portion. When the second locking portion is plugged at the connection cavity opening 131, the trigger portion is located outside the connection cavity 130, and the locking or unlocking between the second locking portion and the first locking portion is completed by rotating the trigger portion.

[0089] It is worth mentioning that when the rotary cover 400 is rotated, the connection between the first locking portion and the second locking portion is locked, and the structure of the connector 300 plugged into the connection cavity 130 is limited within the connection cavity 130, avoiding the disconnection between the first terminal 140 and the second terminal 320 caused by the movement of the connector 300 along the axis direction of the connection cavity 130. In addition, by sealing the connection cavity 130 with the rotary cover 400, it is avoided that external moisture or dust enters the connection cavity 130 and affects the electrical connection effect between the connector 300 and the charging gun body 100. When the trigger portion is rotated in the reverse direction, the connection between the first locking portion and the second locking portion is released. At this time, the rotary cover 400 can be disassembled from the connection cavity opening 131, and the limit on the connector 300 in the axis direction is released. At this time, the connector 300 can be directly pulled out from the charging gun body 100 to complete the separation between the two.

[0090] In this embodiment, since the triggering portion is located outside the connection cavity 130, it is convenient for the staff to rotate the rotary cap 400 without tools, thereby limiting the axial movement of the connector 300 along the axis after the connector 300 is electrically connected to the charging gun body 100, and releasing the axial limit of the connector 300, realizing the detachable separation of the connector 300 and the charging gun body 100.

[0091] Further preferably, a concave cavity 420 is provided on the second locking portion, and the axis of the concave cavity 420 is coaxially arranged with the axis of the first through groove 410. Among them, the concave cavity 420 includes a concave cavity bottom 421 and a concave cavity opening 422, and the first through groove 410 penetrates the concave cavity bottom 421 and extends towards the concave cavity opening 422. The diameter of the first through groove 410 is smaller than the circumferential diameter of the concave cavity 420. When the second locking portion is inserted into the connection cavity opening 131, one end of the cable 310 provided on the connector 300 abuts against the concave cavity bottom 421.

[0092] In this embodiment, by providing the concave cavity 420 on the second locking portion, on the one hand, when the connector 300 is electrically connected to the charging gun body 100, the connector 300 can be clamped between the connection cavity bottom 133 and the concave cavity bottom 421, not only realizing the axial limit of the connector 300 in the connection cavity 130, but also improving the reliability of the electrical connection between the connector 300 and the charging gun body 100, preventing loosening between the two. On the other hand, since one end of the cable 310 provided on the connector 300 is inserted into the concave cavity 420, the radial degree of freedom of the connector 300 is limited, avoiding the shaking of the connector 300 in the connection cavity 130 during the movement of the charging gun. In addition, when it is necessary to separate the charging gun body 100 from the connector 300, since the diameter of the first through groove 410 is smaller than the circumferential diameter of the concave cavity 420, the rotary cap 400 unscrewed from the connection cavity opening 131 can always be sleeved on the cable 310 until the connector 300 is plugged into the corresponding charging gun body 100 again, and then it can be locked by the rotary cap 400, avoiding the loss of the rotary cap 400.

[0093] Preferably, the first locking portion includes a guiding groove 151 and a locking groove 152 that are located on the connection cavity wall 132 and communicate with each other. The extending direction of the guiding groove 151 is consistent with the insertion direction of the rotary cap 400, and the extending direction of the locking groove 152 is consistent with the rotation direction of the rotary cap 400. Among them, when the second locking portion is inserted into the connection cavity opening 131, the second locking portion first forms a plug-in fit with the guiding groove 151 and moves along the guiding groove 151. When the second locking portion reaches the intersection position of the guiding groove 151 and the locking groove 152, rotate the triggering portion so that the second locking portion moves along the locking groove 152 until the second locking portion abuts against the end of the locking groove 152.

[0094] In this embodiment, by providing the guiding groove 151, when the rotary cap 400 is inserted from the opening 131 of the connecting cavity, it can move along a preset trajectory, ensuring that the second locking portion can be reliably inserted into the locking groove 152 during the subsequent rotation process of the rotary cap 400, improving the disassembly and assembly efficiency, and also avoiding damage to the second locking portion.

[0095] It is further pointed out that the number of the guiding grooves 151 and the locking grooves 152 is multiple, and the multiple guiding grooves 151 and the multiple locking grooves 152 are respectively annularly distributed along the axial direction of the connecting cavity 130. Each guiding groove 151 and the locking groove 152 at the corresponding position are spliced to form the corresponding second locking portion, wherein the second locking portion is arranged in an L shape.

[0096] In this embodiment, by providing multiple guiding grooves 151 and multiple locking grooves 152, the reliability of locking between the first locking portion and the second locking portion is improved. Even if one set of the guiding grooves 151 and the locking grooves 152 is damaged, the locking effect can still be achieved.

[0097] It is worth mentioning that since the process of directly opening the guiding groove 151 and the locking groove 152 on the wall 132 of the connecting cavity is difficult, and it will also affect the strength and appearance of the entire charging gun body 100. Therefore, the charging gun body 100 includes an adapter 150, and the adapter 150 is connected to the opening 131 of the connecting cavity through a fastener. Among them, the adapter 150 is provided with a second through groove 153 along the axial direction, and the second locking portion is arranged on the groove wall of the second through groove 153.

[0098] In this embodiment, by providing the adapter 150, the guiding groove 151 and the locking groove 152 that originally needed to be opened on the wall 132 of the connecting cavity are transferred to the groove wall of the second through groove 153 of the adapter. The adapter 150 is an independent structure, so it is convenient to open the guiding groove 151 and the locking groove 152 on the groove wall of the second through groove 153 of the adapter 150, reducing the grooving process.

[0099] It is further pointed out that the adapter 150 includes a first convex ring 154 and a first convex platform 155 that are connected to each other, and the diameter of the first convex ring 154 is larger than the diameter of the first convex platform 155. Among them, the second through groove 153 penetrates through the first convex ring 154 and the first convex platform 155, and the first locking portion is arranged on the first convex platform 155. Among them, the groove depth of the guiding groove 151 is the same as the groove depth of the locking groove 152.

[0100] It is worth mentioning that, for the convenience of installing the adapter 150 at the orifice 131 of the connection cavity, a step 134 is provided at the orifice 131 of the connection cavity, and the step 134 abuts against the first convex ring 154. A plurality of first connection holes 156 are annularly arranged on the first convex ring 154, and the first connection holes 156 are connected to the second connection holes 135 on the step 134 by fasteners.

[0101] It is worth mentioning that the first connection holes 156 are counterbored, so that the tails of the fasteners are hidden in the first connection holes 156, avoiding the formation of an assembly gap between the rotary cover 400 and the adapter 150 when the rotary cover 400 is inserted into the adapter 150.

[0102] In this embodiment, by providing the step 134, it can not only serve as a positioning structure when the adapter 150 is connected in the connection cavity 130, but also make the diameter of the wall 132 of the connection cavity smaller than the diameter of the orifice 131 of the connection cavity, thereby further blocking water vapor or dust from entering the connection cavity 130.

[0103] Preferably, the rotary cover 400 includes a second convex ring 430. A second convex platform 440 and a third convex platform 450 are respectively arranged at both ends of the second convex ring 430 along the axial direction. The second locking portion and the concave cavity 420 are arranged on the second convex platform 440, and the third convex platform 450 serves as a trigger portion. The first through groove 410 axially penetrates through the third convex platform 450, the second convex ring 430, and the second convex platform 440 in sequence. When the second convex platform 440 is inserted and matched with the second through groove 153, the second convex ring 430 abuts against the first convex ring 154.

[0104] It is further pointed out that the sum of the thicknesses of the first convex ring 154 and the second convex ring 430 is not greater than the distance between the side of the step 134 in contact with the first convex ring 154 and the plane where the orifice 131 of the connection cavity is located.

[0105] In this embodiment, since the sum of the thicknesses of the first convex ring 154 and the second convex ring 430 is not greater than the distance between the side of the step 134 in contact with the first convex ring 154 and the plane where the orifice 131 of the connection cavity is located, the side of the second convex ring 430 connected to the third convex platform 450 is indented into the orifice 131 of the connection cavity, thereby further limiting the shaking of the rotary cover 400 during rotation and the shaking of the charging gun during movement, and improving the connection reliability between the first locking portion and the second locking portion.

[0106] Further preferably, the second locking portion includes a plurality of locking blocks 460, and the plurality of locking blocks 460 are annularly distributed along the outer peripheral surface of the second convex platform 440. The number of the locking blocks 460 corresponds to the number of the guiding grooves 151.

[0107] In this embodiment, the function of setting multiple locking blocks 460 is equivalent to that of setting multiple guiding grooves 151 and locking grooves 152, which not only improves the locking reliability, but also matches the number of guiding grooves 151 and locking grooves 152.

[0108] It is worth mentioning that one side of the locking block 460 facing the opening 422 of the concave cavity is arranged as an inclined surface, and one side of the locking block 460 facing the bottom 421 of the concave cavity is arranged as a flat surface.

[0109] In this embodiment, setting one side of the locking block 460 facing the opening 422 of the concave cavity as an inclined surface facilitates the locking block 460 to quickly complete the insertion fit with the guiding groove 151, improving the assembly efficiency. And setting one side of the locking block 460 facing the bottom 421 of the concave cavity as a flat surface can increase the contact area between the locking block 460 and the groove wall of the locking groove 152, improving the locking effect.

[0110] Preferably, a first seal 160 is arranged between the first boss 155 and the step 134. When the connector 300 is inserted into the connection cavity 130, it is nested and connected with the first seal 160. Among them, multiple first flanges 161 are arranged on the inner peripheral surface of the first seal 160, and the multiple first flanges 161 are distributed along the axial direction of the first seal 160.

[0111] In this embodiment, by arranging multiple first flanges 161 on the inner peripheral surface of the first seal 160, and the first seal 160 is generally made of a flexible material such as rubber. When the connector 300 is embedded in the first seal 160, the first flanges 161 on the first seal 160 will be squeezed and deformed, thereby increasing the friction force between the first seal 160 and the connector 300, and further improving the waterproof and dustproof effect.

[0112] It is worth mentioning that since the connector 300 and the charging gun body 100 are separable structures, when it is necessary to calibrate the metering module 200 on the charging gun body 100 or maintain the charging gun body 100, the connection between the connector 300 and the charging gun body 100 needs to be disconnected. In the normal state, the connector 300 is inserted into the connection cavity 130. If you want to separate the two, the staff can only pull the cable 310 located outside the connection cavity 130 to pull out the connector 300 from the connection cavity 130. After the cable 310 is inserted and pulled out multiple times, it is easy to cause the disconnection between the cable 310 and the connector 300, resulting in the connector 300 being unable to be used normally. Therefore, in order to improve the reliability of the connector 300, an anti-disconnection module 350 can be arranged inside the connector 300 to improve the anti-disconnection function of the cable 310.

[0113] Preferably, the connector 300 includes:

[0114] A housing 340 is provided with a first end face 341, a second end face 342, and a third through groove 343 for the cable 310 to run along the axis of the housing 340. Among them, the third through groove 343 penetrates the first end face 341, the second terminal 320 penetrates the second end face 342, and the cable 310 is connected to the second terminal 320, and the second end face 342 is arranged as a flat surface;

[0115] An anti - detachment module 350 is located inside the housing 340, and the anti - detachment module 350 includes:

[0116] A snap ring 351 is clamped on the cable 310 and is close to the end connected to the second terminal 320. And through the deformation of the snap ring 351, there are at least three contact areas 3511 between the inner side wall of the snap ring 351 and the outer side wall of the cable 310. The relative slip between the snap ring 351 and the cable 310 along the axis direction is limited by the contact areas 3511;

[0117] A limiting member 352 is nested on the cable 310 and is located between the snap ring 351 and the first end face 341. And on both sides along the axis direction of the limiting member 352 are a first limiting portion 3521 and a second limiting portion 3522 respectively. Among them, the first limiting portion 3521 is in abutting cooperation with the snap ring 351, the second limiting portion 3522 is in abutting cooperation with the first end face 341, and the maximum edge diameter of the limiting member 352 is larger than the diameter of the third through groove 343 and smaller than the maximum diameter of the first end face 341.

[0118] In this embodiment, through the cooperation between the snap ring 351 and the cable 310, an integral structure is formed between the snap ring 351 and the cable 310, and no relative slip occurs between them. Through the abutting between the limiting member 352 and the snap ring 351, the first end face 341, the freedom degree of the snap ring 351 along the axis direction is limited, and further the freedom degree of the cable 310 along the axis direction is limited, realizing the anti - detachment function of the cable 310.

[0119] Furthermore, it is pointed out that the first limiting portion 3521 is a first limiting surface, forming a surface - to - surface contact with the snap ring 351, and the second limiting portion 3522 is a second limiting surface, forming a surface - to - surface contact with the first end face 341.

[0120] It is worth mentioning that the surface - to - surface contact can provide a larger contact area compared with point or line contact, thus improving the stability and reliability of the limit. In addition, due to the increase in the contact area, the force applied to the structural member can be more evenly distributed, reducing the occurrence of local stress concentration.

[0121] It is worth mentioning that the limiting member 352 is arranged in a circular sheet shape, such as a gasket, etc.

[0122] Preferably, the contact area 3511 between the inner side wall of the deformed snap ring 351 and the outer side wall of the cable 310 can be line-surface contact or surface-surface contact.

[0123] It is worth mentioning that generally the outer contour of the cable 310 is circularly arranged. In order to ensure that the snap ring 351 can be easily clamped and matched with the cable 310, the through hole of the snap ring 351 is also circularly arranged. However, this results in an assembly gap between the snap ring 351 and the cable 310. In order to eliminate the assembly gap between the two, the snap ring 351 is designed to have a deformation function, and the cable 310 also has a deformation function. Through the deformation of the snap ring 351 and the deformation of the cable 310, the snap ring 351 and the cable 310 are made to form a whole, so that while restricting the axial movement of the snap ring 351, the axial movement of the cable 310 can be restricted, thus achieving the purpose of preventing the cable 310 from coming off. And line-surface contact and surface-surface contact can increase the contact area between the snap ring 351 and the cable 310, thereby further preventing relative slippage between the snap ring 351 and the cable 310.

[0124] It is further pointed out that the deformed snap ring 351 is polygonally arranged. Further preferably, the deformed snap ring 351 is hexagonally arranged or octagonally arranged.

[0125] Preferably, an anti-twist portion 3523 is further provided on the first limiting portion 3521 of the limiting member 352, and the anti-twist portion 3523 is nested and matched with the snap ring 351. Among them, at least one limiting plane on the inner circumferential surface of the anti-twist portion 3523 is in surface-surface contact with the outer circumferential surface of the snap ring 351.

[0126] It is worth mentioning that by providing the anti-twist portion 3523, the cable 310 is prevented from twisting in the housing 340. When the cable 310 is subjected to repeated torsional stress, the conductor and the insulating layer inside may be damaged due to fatigue. By providing the anti-twist portion 3523, this stress on the cable 310 can be effectively reduced, and the service life of the cable 310 can be extended. In addition, the setting of the anti-twist portion 3523 helps to maintain the stability of the internal electrical performance of the cable 310 and ensure the quality of signal transmission.

[0127] It is further pointed out that the contour shape of the anti-twist portion 3523 is the same as the contour shape of the snap ring 351. That is, the anti-twist portion 3523 is polygonally arranged. Further preferably, the anti-twist portion 3523 is hexagonally arranged or octagonally arranged.

[0128] Preferably, a second sealing member 353 is provided between the limiting member 352 and the first end face 341, and the second sealing member 353 is nested and matched with the cable 310. Among them, both sides of the second sealing member 353 in the axial direction are in contact with the limiting member 352 and the first end face 341 respectively.

[0129] It is worth mentioning that during actual application, the installation position of the charging gun may be outdoors or indoors. When the charging gun is installed outdoors, due to the changeable outdoor weather, it may be windy or rainy. The charging gun exposed to the air will be eroded by rainwater, causing rainwater or dust to enter the charging gun, affecting the use safety and service life of the charging gun. In this embodiment, by arranging a second seal 353 in the connector 300, rainwater, water vapor or dust can be blocked from entering the charging gun, thus ensuring the use safety and service life of the charging gun.

[0130] In addition, by arranging the second seal 353, the relative distance between the snap ring 351 and the first end face 341 is increased, and the second seal 353 has a certain strength, which can further realize the anti-disconnection function of the cable 310. If you want to pull out the cable 310 from the housing 340, a considerable amount of pulling force is required, which generally only occurs in destructive tests and cannot be pulled out of the housing 340 during normal use.

[0131] Furthermore, multiple second flanges 3531 are arranged on the outer peripheral surface of the second seal 353, and the multiple second flanges 3531 are distributed along the axial direction of the second seal 353.

[0132] In this embodiment, by arranging multiple second flanges 3531 on the outer peripheral surface of the second seal 353, and the second seal 353 is generally made of a flexible material such as rubber. When the second seal 353 is embedded in the housing 340, the second flanges 3531 on the second seal 353 will be squeezed and deformed, thereby increasing the friction between the second seal 353 and the inner wall of the housing 340. On the one hand, it can further improve the waterproof and dustproof effect, and on the other hand, it can improve the anti-disconnection ability of the second seal 353, thereby further indirectly improving the anti-disconnection ability of the cable 310.

[0133] It is worth mentioning that the multiple second flanges 3531 arranged on the outer peripheral surface of the second seal 353 can also be set as external threads, and internal threads are arranged on the inner wall of the housing 340. By screwing the external threads and the internal threads, the above-mentioned effects can be achieved, and it is also convenient to solve the problems of aging and replacement of the second seal 353 after long-term use.

[0134] Preferably, at least two positioning plates 360 are further arranged in the connector 300, and a plurality of positioning holes 361 are formed along the axial direction between the two positioning plates 360 and between the positioning plates 360 and the housing 340. Among them, the second terminal 320 includes a plurality of terminals, the plurality of terminals are connected to the cable 310, and the plurality of terminals are inserted into the plurality of positioning holes 361 correspondingly.

[0135] In this embodiment, by providing the positioning plate 360, on the one hand, it facilitates the rapid assembly of the second terminal 320 and ensures that the angle and gap between any two adjacent terminals are constant. On the other hand, during the insertion and extraction process of the connector 300, the second terminal 320 will not shake within the connector 300, improving the insertion and electrical connection effects. Thirdly, since the material of the positioning plate 360 is an insulating material, it can achieve a good insulating effect.

[0136] Preferably, the housing 340 includes a separable outer shell 344 and an end cap 345, and the outer shell 344 is hollow. The end cap 345 is provided with a third through groove 343 for the cable 310 to pass through. Among them, the first end face 341 is provided on the end cap 345, and the second end face 342 is provided on the outer shell 344.

[0137] In this embodiment, the housing 340 is split into a separable outer shell 344 and an end cap 345, which facilitates the assembly of the connector 300 and the replacement of the cable 310.

[0138] It is further pointed out that since the outer shell 344 and the end cap 345 are separable structures, in order to facilitate the fixing and disassembly between the outer shell 344 and the end cap 345, and to provide a good limiting function in the fixed state, a detachable structure will be provided between the outer shell 344 and the end cap 345, and a part of the detachable structure is provided on the side wall of the outer shell 344, and the other part of the detachable structure is provided on the side wall of the end cap 345.

[0139] It is worth mentioning that the form of the detachable structure can be diverse, and it can be a snap structure, a threaded structure, a pin structure, etc., not limited to the several ways described above.

[0140] For the sake of easy understanding, in this embodiment, the snap structure and the threaded structure are taken as examples for description.

[0141] When the detachable structure is a snap structure, the detachable structure includes a snap block 3441 and a snap groove 3451, and the snap block 3441 is provided on one of the side walls of the outer shell 344 and the end cap 345, and the snap groove 3451 is provided on the other of the side walls of the outer shell 344 and the end cap 345. Among them, through the snap fit between the snap block 3441 and the snap groove 3451, the connection between the outer shell 344 and the end cap 345 is realized.

[0142] It is further pointed out that when the clamping block 3441 is arranged on the side wall of the outer shell 344 and the clamping groove 3451 is arranged on the side wall of the end cover 345, the number of the clamping blocks 3441 and the number of the clamping grooves 3451 can be multiple. Moreover, the multiple clamping blocks 3441 are arranged in a ring along the outer peripheral surface of the outer shell 344, the clamping grooves 3451 are arranged in a ring along the side wall of the end cover 345, and penetrate through the side wall of the end cover 345.

[0143] Similarly, when the clamping block 3441 is arranged on the side wall of the end cover 345 and the clamping groove 3451 is arranged on the side wall of the outer shell 344, the number of the clamping blocks 3441 and the number of the clamping grooves 3451 can be multiple. Moreover, the multiple clamping blocks 3441 are arranged in a ring along the inner peripheral surface of the end cover 345, the clamping grooves 3451 are arranged in a ring along the side wall of the outer shell 344, and penetrate through the side wall of the end cover 345.

[0144] It is further pointed out that when the clamping block 3441 is arranged on the outer peripheral surface of the outer shell 344 or the inner peripheral surface of the end cover 345, the radial cross-section of the clamping block 3441 is in a trapezoidal structure, wherein the inclined surface of the clamping block 3441 is arranged as an arc-shaped curved surface.

[0145] When the detachable structure is a threaded structure, the detachable structure includes an external thread and an internal thread, and the external thread is arranged on the outer peripheral surface of the outer shell 344, and the internal thread is arranged on the inner peripheral surface of the end cover 345. Wherein, the connection between the outer shell 344 and the end cover 345 is completed through the screwing connection between the external thread and the internal thread.

[0146] Preferably, the charging gun body 100 includes a gun body 170, and a handle 171 is arranged on the gun body 170. On the one hand, it is convenient to hold the charging gun, and on the other hand, the inside of the handle 171 is hollow and can be used as a placement position for electrical components.

[0147] Preferably, the metering module 200 is used to calculate the bidirectional flowing electric quantity between the charging pile and the electric vehicle load.

[0148] Among them, the metering module 200 includes:

[0149] An acquisition circuit, which is configured to acquire the electrical parameter signals flowing through the cable;

[0150] A calculation circuit, which is configured to calculate the corresponding electrical parameter values according to the acquired electrical parameter signals;

[0151] A control circuit, which is configured to output corresponding control signals according to the instruction signals of the terminal or the electrical parameter values calculated by the calculation circuit, and send the electrical parameter values and the position information of the charging gun body to the terminal at regular intervals;

[0152] A communication circuit configured to wirelessly transmit the value of the electrical parameter and the position data of the charging gun body to a terminal that has established a data connection with the charging gun body, and enable the terminal to determine the positioning information of the charging and discharging gun head device.

[0153] In this embodiment, the metering module is first integrated on the charging gun body, and then a communication circuit is set in the metering module to transmit the value of the electrical parameter detected in real time to the terminal, so as to obtain the accurate charging or discharging power of the vehicle. And when an abnormal situation occurs in the metering module, the fault type and the corresponding gun head position data can be sent to the terminal through the communication circuit in time. Then the terminal can judge which charging gun body has an abnormality according to the data transmitted in real time, so as to accurately locate the charging and discharging gun head device that may have a fault. At the same time, the terminal can provide the optimal path planning for the maintenance or calibration personnel to reach the corresponding charging gun device fastest according to the position information of the charging gun body.

[0154] Preferably, each circuit in the metering module 200 is arranged on the same circuit board or on multiple different circuit boards, and the circuit board is fixed to the charging gun body 100 through a bolt or a plug-in structure.

[0155] Preferably, in order to achieve more accurate acquisition of the voltage value of the cable 310, in addition to obtaining the voltage value through the sensor, the voltage detection circuit includes but is not limited to sampling the voltage values between the cable 310 and the positive pole of the DC power supply (DC+), the DC power enrichment (DC-) by setting a voltage dividing resistor, using a voltage transformer, or adopting a voltage sensor based on the fluxgate principle or the Hall principle, and then transmitting the corresponding value to the terminal through the communication circuit for data display or fault diagnosis.

[0156] At the same time, in order to prevent the cable 310 from overheating during the charging process, in this embodiment, a temperature sensor is also provided. The temperature sensor is connected to the control circuit to obtain the real-time temperature value of the cable 310. The real-time temperature signal obtained by the temperature sensor will be transmitted to the calculation circuit, and the real-time temperature signal will be converted into the corresponding temperature value in the calculation circuit. Then, on the one hand, this temperature value will be transmitted to the terminal through the communication circuit, and on the other hand, it will be judged in the calculation circuit whether this temperature value exceeds the threshold, so as to serve as the basis for whether the control circuit outputs to continue the charging operation.

[0157] It is worth mentioning that, in this embodiment, the calculation circuit, the power supply circuit, and the voltage detection circuit are arranged in the installation cavity 120, and the communication circuit is arranged in the handle 171.

[0158] On the one hand, limited by the space within the DC charging and discharging gun body, it is unable to accommodate more circuit board layouts. On the other hand, in order to better achieve the transmission of communication signals and the isolation and shielding between circuit signals, the communication circuit and its corresponding antenna are thus arranged in the handle 171 away from the installation cavity 120.

[0159] It should be noted that in the present invention, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. Terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0160] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0161] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A measurable and separable DC charging gun, characterized in that, Comprising: A charging gun body (100) provided with a hollow interior, and the interior space of the charging gun body (100) is divided into an installation cavity (120) and a connection cavity (130) along its axial direction by a plunger head (110). A first stepped portion is provided on one side of the plunger head (110) facing the connection cavity (130), and a first wiring terminal (140) is provided on the plunger head (110). The first end of the first wiring terminal (140) is located in the installation cavity (120) and extends out of the installation cavity (120) along the length direction of the installation cavity (120), and the second end of the first wiring terminal (140) is located in the connection cavity (130). A metering module (200), located in the installation cavity (120), and the power consumption data measured by the metering module (200) is displayed on the charging gun body (100) or on the charging pile. A connector (300), one end of which is connected to a cable (310) electrically connected to the charging pile, and the other end is provided with a second wiring terminal (320). A second stepped portion is provided on the end face where the second wiring terminal (320) is located. Wherein, when the connector (300) is inserted into the connection cavity (130), the second stepped portion is inserted and matched with the first stepped portion, and the second wiring terminal (320) and the first wiring terminal (140) form a male-female plug-in match to complete the electrical connection between the connector (300) and the charging gun body (100). A rotary cover (400), on which a first through groove (410) for the cable (310) to pass through is provided, and the rotary cover (400) is detachably connected to the connection cavity (130). By rotating the rotary cover (400), the structure of the connector (300) inserted into the connection cavity (130) is locked in the connection cavity (130) or unlocked.

2. The metering and separable DC charging gun according to claim 1, wherein The first stepped portion includes a cavity (111), and a plurality of pits (112) with different depths are provided on the bottom of the cavity (111). At least one first jack (113) matching the wiring terminal in the first wiring terminal (140) is provided in each pit (112). The second stepped portion includes a convex disc (3442), and a plurality of convex blocks (3443) with different thicknesses are provided on the convex disc (3442). At least one second jack (3444) matching the wiring terminal in the second wiring terminal is provided on each convex block (3443). Wherein, when the connector (300) is inserted and matched with the charging gun body (100), the pits (112) are inserted and matched with the corresponding convex blocks (3443).

3. A metering and separable DC charging gun according to claim 1, characterized in that, The connection cavity (130) includes a connection cavity opening (131), a connection cavity wall (132), and a connection cavity bottom (133). Among them, the first end of the first terminal (140) penetrates through the connection cavity bottom (133) and extends into the installation cavity (120), and extends along the length direction of the installation cavity (120). The second end of the first terminal (140) is located within the connection cavity (130) and extends towards the connection cavity opening (131), and a first locking portion is provided on the connection cavity wall (132); the two ends along the axis direction of the rotary cover (400) are respectively a second locking portion and a triggering portion. When the second locking portion is inserted at the connection cavity opening (131), the triggering portion is located outside the connection cavity (130), and the locking or unlocking between the second locking portion and the first locking portion is completed by rotating the triggering portion.

4. The metering and separable DC charging gun according to claim 3, characterized in that, A concave cavity (420) is provided on the second locking portion, and the axis of the concave cavity (420) is coaxially arranged with the axis of the first through groove (410). Among them, the concave cavity (420) includes a concave cavity bottom (421) and a concave cavity opening (422), and the first through groove (410) penetrates through the concave cavity bottom (421) and extends towards the concave cavity opening (422). The diameter of the first through groove (410) is smaller than the circumferential diameter of the concave cavity (420). When the second locking portion is inserted at the connection cavity opening (131), one end of the cable (310) provided on the connector (300) abuts against the concave cavity bottom (421).

5. A metering and separable DC charging gun according to claim 3, characterized in that, The first locking portion includes a guiding groove (151) and a locking groove (152) that are located on the connection cavity wall (132) and communicate with each other. The extending direction of the guiding groove (151) is consistent with the insertion direction of the rotary cover (400), and the extending direction of the locking groove (152) is consistent with the rotation direction of the rotary cover (400). Among them, the second locking portion is in sliding fit with the guiding groove (151), and the second locking portion is in rotational fit with the locking groove (152).

6. The metering and separable DC charging gun according to claim 4, characterized in that, The charging gun body (100) includes an adapter (150), and the adapter (150) is connected to the connection cavity opening (131) through a fastener. Among them, a second through groove (153) is arranged along the axis direction of the adapter (150), and the second locking portion is provided on the groove wall of the second through groove (153).

7. The metering and separable DC charging gun according to claim 6, wherein The adapter (150) includes a first convex ring (154) and a first convex platform (155) that are connected to each other, and the diameter of the first convex ring (154) is larger than the diameter of the first convex platform (155). Among them, the second through groove (153) penetrates through the first convex ring (154) and the first convex platform (155), and the first locking portion is provided on the first convex platform (155).

8. A metering and separable DC charging gun according to claim 7, characterized in that, The capping (400) includes a second convex ring (430), with a second boss (440) and a third boss (450) respectively provided at two ends of the second convex ring (430) along the axial direction thereof, and the second locking portion and the cavity (420) are provided on the second boss (440), and the third boss (450) serves as the triggering portion. Among them, the first through groove (410) sequentially penetrates through the third boss (450), the second convex ring (430) and the second boss (440) along the axial direction. When the second boss (440) is inserted and matched with the second through groove (153), the second convex ring (430) abuts against the first convex ring (154).

9. The metering and separable DC charging gun according to claim 8, wherein, A step (134) is provided at the orifice (131) of the connection cavity, and the step (134) abuts against the first convex ring (154). Among them, the sum of the thicknesses of the first convex ring (154) and the second convex ring (430) is not greater than the distance between the side of the step (134) that contacts the first convex ring (154) and the plane where the orifice (131) of the connection cavity is located.

10. A measurable and separable DC charging gun according to claim 9, characterized in that, A first sealing member (160) is provided between the first boss (155) and the step (134). When the connector (300) is inserted into the connection cavity (130), it is nested and connected with the first sealing member (160). Among them, multiple first flanges (161) are provided on the inner circumferential surface of the first sealing member (160), and the multiple first flanges (161) are distributed along the axial direction of the first sealing member (160).

11. A metering and separable DC charging gun according to any one of claims 1 to 10, characterized in that, The connector (300) includes: A housing (340) provided with a first end face (341), a second end face (342), and a third through groove (343) for the cable (310) to run along the axial direction of the housing (340). Among them, the third through groove (343) penetrates through the first end face (341), the second terminal (320) penetrates through the second end face (342), and the cable (310) is connected to the second terminal (320). An anti-disengagement module (350) located inside the housing (340), and the anti-disengagement module (350) includes: A snap ring (351) clamped on the cable (310) and close to the end connected to the second terminal (320), and at least three contact areas (3511) are formed between the inner side wall of the snap ring (351) and the outer side wall of the cable (310) by the deformation of the snap ring (351), and the mutual sliding of the snap ring (351) and the cable (310) along the axial direction is defined by the contact areas (3511). The limiting member (352) is nested on the cable (310) and is located between the snap ring (351) and the first end face (341). On both sides along the axial direction of the limiting member (352), there are a first limiting portion (3521) and a second limiting portion (3522) respectively. Wherein, the first limiting portion (3521) is in abutting cooperation with the snap ring (351), the second limiting portion (3522) is in abutting cooperation with the first end face (341), and the maximum edge diameter of the limiting member (352) is greater than the diameter of the third through groove (343) and less than the maximum diameter of the first end face (341).

12. A metering and separable DC charging gun according to claim 11, characterized in that, The contact area (3511) between the inner side wall of the deformed snap ring (351) and the outer side wall of the cable (310) is line-surface contact or surface-surface contact.

13. A measurable and separable DC charging gun according to claim 11, characterized in that, A torsion prevention portion (3523) is further provided on the first limiting portion (3521) of the limiting member (352), and the torsion prevention portion (3523) is nested and cooperated with the snap ring (351). Wherein, there is at least one limiting plane on the inner circumferential surface of the torsion prevention portion (3523) in surface-surface contact with the outer circumferential surface of the snap ring (351).

14. A metering and separable DC charging gun according to claim 11, characterized in that, A second sealing member (353) is provided between the limiting member (352) and the first end face (341), and the second sealing member (353) is nested and cooperated with the cable (310). Wherein, both sides of the second sealing member (353) along the axial direction are in abutting contact with the limiting member (352) and the first end face (341) respectively. A plurality of second flanges (3531) are provided on the outer circumferential surface of the second sealing member (353), and the plurality of second flanges (3531) are distributed along the axial direction of the second sealing member (353).

15. A measurable and separable DC charging gun according to claim 11, characterized in that, At least two positioning plates (360) are further provided in the connector (300). Between the two positioning plates (360) and between the positioning plates (360) and the housing (340), a plurality of positioning holes (361) are formed along the axial direction. Wherein, the second wiring terminal (320) includes a plurality of wiring ends, the plurality of wiring ends are connected to the cable (310), and the plurality of wiring ends are inserted into the plurality of positioning holes (361) correspondingly.

16. A metering and separable DC charging gun according to claim 11, characterized in that, The housing (340) includes a separable outer shell (344) and an end cover (345). The outer shell (344) is provided in a hollow shape. A third through groove (343) for the cable (310) to pass through is provided on the end cover (345). Wherein, the first end face (341) is provided on the end cover (345), the second end face (342) is provided on the outer shell (344), and a detachable structure is provided between the outer shell (344) and the end cover (345). A part of the structure of the detachable structure is provided on the side wall of the outer shell (344), and another part of the structure of the detachable structure is provided on the side wall of the end cover (345).

17. A metering and separable DC charging gun according to claim 1, characterized in that, The charging gun body (100) includes a gun body (170), and a handle (171) is provided on the gun body (170), wherein the handle (171) is hollow.

18. A metering and separable DC charging gun according to claim 1, characterized in that, The metering module (200) is used to calculate the bidirectional flowing electricity quantity between the charging pile and the electric vehicle load; the metering module (200) at least includes: A collection circuit, which is configured to obtain the electrical parameter signal flowing through the cable; A calculation circuit, which is configured to calculate the corresponding electrical parameter value according to the obtained electrical parameter signal; A control circuit, which is configured to output a corresponding control signal according to the instruction signal of the terminal or the electrical parameter value calculated by the calculation circuit to send the electrical parameter value and the position information of the gun head body to the terminal at regular intervals; A communication circuit, which is configured to wirelessly send the electrical parameter value and the position data of the gun head body to the terminal that has established a data connection with the gun head body, and enable the terminal to determine the positioning information of the charging and discharging gun head device.

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