Charging gun

Abstract

The invention belongs to the technical field of charging, and discloses a charging gun which comprises a gun body, a terminal fixing seat, a charging terminal and a temperature monitoring assembly. The terminal fixing seat is arranged in the gun body, and the peripheral wall of the terminal fixing seat and the gun body are matched with each other to define a temperature detection hole; one end of the charging terminal is arranged on the terminal fixing seat; the temperature monitoring assembly comprises a temperature monitoring device and a heat conduction piece arranged outside the temperature monitoring device in a sleeving mode, and the heat conduction piece is located in the temperature detection hole and abuts against the temperature monitoring device and the terminal fixing base. According to the charging gun provided by the invention, the risk of over-high temperature is reduced, so that the condition that the gun body or the terminal fixing seat is heated and melted is prevented, and the charging gun has relatively high reliability.

Description

Technical Field

[0001] The present invention relates to the field of charging technology, and in particular to a charging gun. Background Art

[0002] Charging of new energy electric vehicles requires the use of a charging gun, the charging plug of the charging gun can be inserted into the socket of the new energy electric vehicle to achieve charging.

[0003] In the prior art, the temperature of the charging terminal of the charging plug is relatively high during the charging process, especially the temperature rise at the location where the charging terminal is connected to the cable is relatively fast. In order to avoid the danger of spontaneous combustion of the charging gun or melting of the charging gun body due to the excessive temperature of the charging terminal, the charging gun is usually provided with a temperature control system. The temperature control system collects the temperature of the charging gun through a temperature monitoring device. When the temperature of the charging gun is too high, the charging function of the charging gun is controlled to reduce the heat generated by the charging terminal, thereby ensuring the safe charging of the charging gun. Specifically, the charging terminal is arranged in a cavity formed by the charging gun body, and the temperature monitoring device is arranged in another cavity formed by the charging gun body, and is fixed by sealing glue, and the material of the charging gun body is usually plastic.

[0004] The heat generated by the charging terminal is first transferred to the charging gun body, then transferred to the sealing glue through the charging gun body, and finally transferred to the temperature monitoring device. The thermal resistance of the charging gun body made of sealing glue and plastic material is large, resulting in a large deviation between the temperature detected by the temperature monitoring device and the actual temperature of the structure around the charging terminal. The charging gun has a greater risk of overheating and lower reliability. Summary of the invention

[0005] The purpose of the present invention is to provide a charging gun to solve the problems of high temperature and poor reliability in the prior art.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] Charging gun, including:

[0008] Gun body;

[0009] A terminal fixing seat, wherein the terminal fixing seat is arranged in the gun body, and the outer peripheral wall of the terminal fixing seat and the gun body cooperate with each other to form a temperature detection hole;

[0010] A charging terminal, one end of which is disposed on the terminal fixing seat;

[0011] The temperature monitoring component comprises a temperature monitoring device and a heat conducting member sleeved outside the temperature monitoring device. The heat conducting member is located in the temperature detection hole and abuts against the temperature monitoring device and the terminal fixing seat.

[0012] In one embodiment, the heat conductive member includes a connected heat conductive structure and an elastic deformable body, the heat conductive structure is connected to the temperature monitoring device, and the elastic deformable body protrudes in a direction away from the temperature monitoring device and abuts against the terminal fixing seat.

[0013] In one embodiment, the elastic deformation body includes a plurality of elastic strips, each of which protrudes in a direction away from the temperature monitoring device; or,

[0014] The elastic deformation body is an integrated structure.

[0015] In one embodiment, the heat-conducting structure is a ring body sleeved on the temperature monitoring device, and two heat-conducting structures are arranged opposite to each other, and the elastic deformation body is connected between the two heat-conducting structures; and / or,

[0016] The heat-conducting structure is a ring body sleeved on the temperature monitoring device, and one end of the heat-conducting structure is bent inward to form a bent portion, and the bent portion abuts against an end surface of one end of the temperature monitoring device.

[0017] In one embodiment, the heat conducting member is made of metal; and / or the terminal fixing seat is made of metal.

[0018] In one embodiment, the terminal fixing seat is tubular, and a cooling inlet is provided on a side wall of the terminal fixing seat. The charging gun also includes a cable, the charging terminal is plugged into one end of the terminal fixing seat, and the cable is plugged into the other end of the terminal fixing seat. The charging terminal, the cable and the terminal fixing seat cooperate with each other to form a cooling cavity connected to the cooling inlet, and a cooling medium is provided in the cooling cavity.

[0019] In one of the embodiments, the heat conducting member and the charging terminal are arranged opposite to each other in the radial direction of the terminal fixing seat.

[0020] In one of the embodiments, the cable is provided with a cooling channel, the cooling channel has a channel opening on the surface of the cable, the channel opening is provided at a portion of the cable located in the terminal fixing seat and is connected to the cooling cavity.

[0021] In one of the embodiments, the charging gun further includes a supporting structure, which is disposed in the cooling channel and is provided with a supporting through hole connected to the cooling channel, and the supporting structure is used to support the cable.

[0022] In one embodiment, the charging gun also includes a sealing assembly, which is sleeved on the charging terminal and is used to seal the gap between the charging terminal and the inner wall of the terminal fixing seat; the contact position between the heat conductor and the terminal fixing seat is a first contact position, and the contact position between the sealing assembly and the terminal fixing seat is a second contact position, and the first contact position and the second contact position are staggered in the axial direction of the terminal fixing seat.

[0023] Beneficial effects of the present invention:

[0024] In the charging gun provided by the present invention, one end of the charging terminal is arranged on the terminal fixing seat, and the terminal fixing seat and the gun body cooperate with each other to form a temperature detection hole for installing a temperature monitoring component, and the temperature monitoring component is in direct contact with the terminal fixing seat, so that the temperature monitoring component can directly monitor the temperature of the terminal fixing seat to avoid the situation where the temperature of the terminal fixing seat is too high, and the temperature monitoring component includes a temperature monitoring device and a heat conductor, and the heat on the terminal fixing seat can be transferred to the heat conductor, so that the temperature of the heat conductor is the same or approximately the same as the temperature of the terminal fixing seat, and the temperature of the heat conductor monitored by the temperature monitoring device can be considered as the temperature of the terminal fixing seat, thereby improving the accuracy of monitoring the temperature of the terminal fixing seat, reducing the number of components between the terminal fixing seat and the temperature monitoring device, and thereby making the thermal resistance between the terminal fixing seat and the temperature monitoring device smaller, so that the deviation between the temperature monitored by the temperature monitoring device and the actual temperature at the terminal fixing seat is smaller, reducing the risk of the charging gun having an overtemperature, and thereby preventing the gun body or the terminal fixing seat from melting due to heat, and having high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 is a first structural schematic diagram of a charging gun provided in an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the exploded structure of a charging gun provided in an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of the first part of the charging gun provided by an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of the second part of the charging gun provided in an embodiment of the present invention;

[0030] Figure 5 The present invention Figure 4 AA section view shown;

[0031] Figure 6 is a schematic structural diagram of a support portion provided by an embodiment of the present invention;

[0032] Figure 7 is an exploded view of a portion of a charging gun provided in an embodiment of the present invention;

[0033] Figure 8 is a schematic structural diagram of a heat conducting member provided in an embodiment of the present invention;

[0034] Fig. 9 is a first structural schematic diagram of a charging terminal, a terminal fixing seat and a cable provided in an embodiment of the present invention;

[0035] Fig.10 is a second structural schematic diagram of a charging terminal, a terminal fixing seat and a cable provided in an embodiment of the present invention;

[0036] Fig.11 The present invention Fig. 9 a cross-sectional view of the structure shown;

[0037] Fig.12 The present invention Fig. 9 An exploded view of the structure shown;

[0038] Fig.13 is a schematic diagram of the structure of a charging terminal provided by an embodiment of the present invention;

[0039] Fig.14 is a schematic structural diagram of a terminal fixing seat provided by an embodiment of the present invention;

[0040] Fig.15 is a second structural schematic diagram of a charging gun provided in an embodiment of the present invention;

[0041] Fig.16 is a third structural schematic diagram of a charging gun provided in an embodiment of the present invention.

[0042] In the figure:

[0043] 100, gun body; 110, main body; 120, support part; 121, first mounting groove; 122, second mounting groove; 200, terminal fixing seat; 210, cooling inlet; 220, assembly hole; 230, limiting groove; 240, cavity body; 250, transfer structure; 251, connecting flow channel; 2511, first section; 2512, second section; 252, sealing hole; 260, sealing joint; 270, sealing screw; 300, charging terminal; 310, plug end; 320, connecting end; 321, main body; 322, connecting part; 323, screw hole; 324 , stopper; 330, sealing groove; 400, temperature monitoring assembly; 410, temperature monitoring device; 420, heat conductor; 421, ring body; 422, elastic deformation body; 4221, elastic strip; 423, bending portion; 500, cable; 510, cooling channel; 511, channel opening; 520, conductive portion; 600, cooling cavity; 700, supporting structure; 710, supporting through hole; 800, sealing assembly; 910, connecting bolt; 10, temperature detection hole; 1, head structure; 2, tail structure; 31, main pipeline; 32, branch pipeline; 4, collecting cavity; 5, tee. DETAILED DESCRIPTION

[0044] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0048] In the description of this embodiment, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or there may be a central element.

[0050] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0051] This embodiment provides a charging gun, which can improve the accuracy of temperature monitoring, avoid the situation where the temperature of the charging gun is too high, and has high reliability. The charging gun provided by this embodiment can be used to charge new energy electric vehicles.

[0052] like Figures 1 to 8 As shown, the charging gun includes a gun body 100 , a terminal fixing seat 200 , a charging terminal 300 , and a temperature monitoring component 400 .

[0053] The gun body 100 in this embodiment is the main structure of the charging gun, which is used to support or accommodate the terminal fixing seat 200, the charging terminal 300 and the temperature monitoring component 400. In some optional embodiments, such as Figure 2As shown, the gun body 100 includes a main body 110 and a support part 120 fixedly arranged in the main body 110. One end of the main body 110 is a plug end, which is used to be inserted into the socket of a new energy electric vehicle. The support part 120 is used to support and fix the structure inside the main body 110. Exemplarily, the materials of the main body 110 and the support part 120 can be plastic or other hard non-metallic materials, so that there will be no leakage, and it has high safety.

[0054] The terminal fixing seat 200 in this embodiment is used to fix the charging terminal 300. Specifically, the terminal fixing seat 200 is arranged in the gun body 100, and is fixed relative to the gun body 100, so that the charging terminal 300 is fixed relative to the gun body 100. Optionally, the material of the terminal fixing seat 200 in this embodiment can be a metal material to have a higher heat transfer coefficient. Of course, it can be understood that the material of the terminal fixing seat 200 is not limited to a metal material, and can also be a non-metallic material with a high thermal conductivity, which is not limited in this embodiment.

[0055] For example, Figure 6 As shown, the support portion 120 is provided with a first installation groove 121 , and the first installation groove 121 cooperates with the main body 110 to form an installation space, and the terminal fixing seat 200 is fixedly installed in the installation space.

[0056] In one possible implementation, Figure 7 As shown, the outer peripheral wall of the terminal fixing seat 200 and the gun body 100 cooperate with each other to form a temperature detection hole 10, and the temperature detection hole 10 is used to install the temperature monitoring component 400. Specifically, the temperature detection hole 10 in this embodiment is formed by the support portion 120 and the terminal fixing seat 200 cooperating with each other. For example, see Figure 6 The groove wall of the first mounting groove 121 is provided with a second mounting groove 122. When the terminal fixing seat 200 is located in the first mounting groove 121, the outer peripheral wall of the terminal fixing seat 200 is tightly against the groove opening of the second mounting groove 122, so that it can cooperate with the second mounting groove 122 to form a temperature detection hole 10, so that part of the hole wall of the temperature detection hole 10 is formed by the terminal fixing seat 200.

[0057] like Figure 4 and Figure 5 As shown, one end of the charging terminal 300 is fixedly disposed on the terminal fixing seat 200, and the other end of the charging terminal 300 extends to the plug end of the gun body 100 so as to be electrically connected to the terminal of the socket of the new energy electric vehicle to realize the transmission of electric energy.

[0058] For example, please see Figure 5, the temperature monitoring assembly 400 includes a temperature monitoring device 410 and a heat conductive member 420 sleeved outside the temperature monitoring device 410. The heat conductive member 420 is located in the temperature detection hole 10, and is in contact with both the temperature monitoring device 410 and the terminal fixing seat 200. The heat conductive member 420 is configured to transfer the heat of the terminal fixing seat 200 to the temperature monitoring device 410, specifically to the monitoring position of the temperature monitoring device 410, so that the temperature monitoring device 410 can indirectly monitor the temperature of the terminal fixing seat 200. When the temperature of the terminal fixing seat 200 is high, it means that the temperature of the charging terminal 300 is already very high. At this time, it is necessary to reduce the charging power of the charging gun to reduce the temperature of the charging terminal 300, so that the temperature of the terminal fixing seat 200 and the gun body 100 will not be too high. It should be noted that the heat conductive member 420 in this embodiment has a high thermal conductivity so as to be able to transfer the temperature of the terminal fixing seat 200 to the temperature monitoring device 410.

[0059] Optionally, the temperature monitoring device 410 in this embodiment may be an NTC temperature sensor or other temperature sensors, which is not limited in this embodiment.

[0060] In the charging gun provided in this embodiment, one end of the charging terminal 300 is arranged on the terminal fixing seat 200, and the terminal fixing seat 200 and the gun body 100 cooperate with each other to form a temperature detection hole 10 for installing the temperature monitoring component 400, and the temperature monitoring component 400 is directly in contact with the terminal fixing seat 200, so that the temperature monitoring component 400 can directly monitor the temperature of the terminal fixing seat 200 to avoid the situation where the temperature of the terminal fixing seat 200 is too high, and the temperature monitoring component 400 includes a temperature monitoring device 410 and a heat conductive member 420, and the heat on the terminal fixing seat 200 can be transferred to the heat conductive member 420, so that the temperature of the heat conductive member 420 is the same as that of the terminal fixing seat 200. The temperature of the heat conductor 420 monitored by the temperature monitoring device 410 can be considered to be the temperature of the terminal fixing base 200, which improves the accuracy of monitoring the temperature of the terminal fixing base 200 and reduces the number of components between the terminal fixing base 200 and the temperature monitoring device 410, thereby making the thermal resistance between the terminal fixing base 200 and the temperature monitoring device 410 smaller, so that the deviation between the temperature monitored by the temperature monitoring device 410 and the actual temperature at the terminal fixing base 200 is smaller, reducing the risk of overheating of the charging gun, thereby preventing the gun body 100 or the terminal fixing base 200 from melting due to heat, and having higher reliability.

[0061] In one embodiment, the charging gun generally includes at least two charging terminals 300, and correspondingly, the number of terminal fixing seats 200 is the same as the number of charging terminals 300, and the terminal fixing seats 200 are used to fix the corresponding charging terminals 300. The number of temperature monitoring components 400 is the same as the number of terminal fixing seats 200, and the heat conductive member 420 of the temperature monitoring component 400 abuts against the corresponding terminal fixing seat 200, so that the temperature monitoring device 410 can monitor the temperature of the corresponding terminal fixing seat 200. The accompanying drawings of this embodiment show a schematic diagram of a charging gun including two charging terminals 300.

[0062] The heat conducting member 420 may have various structures. In one embodiment, for example, Figure 7 and Figure 8 As shown, the heat-conducting member 420 includes a heat-conducting structure (not shown in the figure) and an elastic deformation body 422 that are connected to each other. The heat-conducting structure is connected to the monitoring position of the temperature monitoring device 410, so that the temperature monitoring device 410 can monitor the temperature of the heat-conducting structure. The elastic deformation body 422 protrudes in the direction away from the temperature monitoring device 410, and the elastic deformation body 422 can be elastically deformed in a direction perpendicular to the axial direction of the temperature monitoring device 410, so that it can elastically abut against the terminal fixing seat 200, so that the elastic deformation body 422 can tightly abut against the terminal fixing seat 200, thereby increasing the contact area between the terminal fixing seat 200 and the elastic deformation body 422, ensuring the heat transfer efficiency, and further improving the accuracy of the temperature of the terminal fixing seat 200 measured by the temperature monitoring device 410.

[0063] In one possible implementation, Figure 7 As shown, the heat-conducting structure is a ring body 421 sleeved on the temperature monitoring device 410, and two heat-conducting structures are arranged opposite to each other, and the elastic deformation body 422 is connected between the two heat-conducting structures. In this embodiment, the two ring bodies 421 are arranged opposite to each other along the axis direction of the temperature monitoring device 410, and the two ring bodies 421 are sleeved on the temperature monitoring device 410.

[0064] Exemplarily, when the heat-conducting structure is a ring body 421 sleeved on the temperature monitoring device 410, as Figure 5 and Figure 8As shown, one end of the heat-conducting structure is bent inward to form a bent portion 423. The heat-conducting structure with the bent portion 423 is sleeved on one end of the temperature monitoring device 410 (specifically, it can be the monitoring end of the temperature monitoring device 410), and the bent portion 423 is in contact with the end surface of the one end of the temperature monitoring device 410. In this way, the heat-conducting member 420 can be sleeved on one end of the temperature monitoring device 410, and the position of the heat-conducting member 420 relative to the temperature monitoring device 410 is fixed, so that the heat-conducting member 420 can be located at the monitoring position of the temperature monitoring device 410, further reducing the deviation between the temperature monitored by the temperature monitoring device 410 and the temperature of the terminal fixing seat 200. In addition, when assembling the heat-conducting member 420 and the temperature monitoring device 410, the heat-conducting member 420 can be inserted from the end of the heat-conducting member 420 facing away from the bent portion 423 until the bent portion 423 contacts the end surface of the temperature monitoring device 410, which facilitates the assembly of the two. In addition, when the assembled heat conductive member 420 and the temperature monitoring device 410 are inserted into the temperature detection hole 10, since the heat conductive member 420 is shorter than the temperature monitoring device 410, it is usually necessary to grasp the temperature monitoring device 410 and insert both into the temperature detection hole 10. Due to the existence of the bending portion 423, during the insertion process, the temperature monitoring device 410 will not extend out from the end where the bending portion 423 is located, thereby ensuring the uniqueness of the relative positions of the temperature monitoring device 410 and the heat conductive member 420.

[0065] In one embodiment, please continue to see Figure 8 The elastic deformation body 422 includes a plurality of elastic strips 4221, each of which protrudes in a direction away from the temperature monitoring device 410. Optionally, the plurality of elastic strips 4221 are arranged in sequence and spaced along the circumferential direction of the heat-conducting structure. Some of the plurality of elastic strips 4221 abut against the gun body 100, and other portions of the elastic strips 4221 abut against the terminal fixing seat 200. By providing a plurality of elastic strips 4221, there is a gap between the elastic strips 4221 and the elastic strips 4221, so that the elastic strips 4221 have a larger deformation space in a direction perpendicular to the axial direction of the temperature monitoring device 410, and the elastic strips 4221 do not interfere with each other.

[0066] In other embodiments, the elastic deformation body 422 is not formed by a plurality of elastic strips 4221 , and the elastic deformation body 422 is a cylindrical integrated structure to have a higher structural strength.

[0067] Optionally, the heat conducting member 420 in this embodiment is an integrated structure, so that the heat conducting member 420 has a higher structural strength.

[0068] Optionally, the heat conductive member 420 is made of metal, which, on the one hand, can have a higher thermal conductivity; on the other hand, the heat conductive member 420 made of metal has higher structural strength and ductility, and can have a longer service life.

[0069] For example, Figure 5 As shown, the terminal fixing seat 200 is tubular, and, as shown in FIG. Fig. 9 and Fig.10 As shown, a cooling inlet 210 is provided on the side wall of the terminal fixing seat 200. The charging gun also includes a cable 500, the charging terminal 300 is sealed and plugged into one end of the terminal fixing seat 200, and the cable 500 is sealed and plugged into the other end of the terminal fixing seat 200. The charging terminal 300, the cable 500 and the terminal fixing seat 200 cooperate with each other to form a cooling cavity 600 connected to the cooling inlet 210, and a cooling medium is provided in the cooling cavity 600, and the cooling medium is used to cool the charging terminal 300 and the cable 500. It should be noted that the cooling medium in the cooling cavity 600 is connected to the external cooling system through the cooling inlet 210 to achieve cooling of the charging gun.

[0070] The charging gun provided in this embodiment is provided with a cooling chamber 600, so that the cooling medium in the cooling chamber 600 can promptly take away the heat from the charging terminal 300, the cable 500 and the terminal fixing seat 200, thereby improving the heat transfer efficiency between the cooling medium and the charging terminal 300 and the cable 500, so that the temperature of the terminal fixing seat 200 will not be too high, thereby not limiting the charging efficiency of the charging gun, and shortening the charging time of the charging gun.

[0071] In one possible implementation, Figure 5 As shown, the heat conducting member 420 and the charging terminal 300 are arranged opposite to each other in the radial direction of the terminal fixing seat 200. The radial direction of the terminal fixing seat 200 is perpendicular to the opposite direction of the axial direction of the terminal fixing seat 200. Figure 5 X direction in the diagram. By arranging the heat conductive member 420 to be arranged opposite to the charging terminal 300 in the radial direction of the terminal fixing seat 200, the heat conductive member 420 can transfer the heat of the portion of the terminal fixing seat 200 that is in direct contact with the charging terminal 300 to the temperature monitoring device 410, so that the temperature monitored by the temperature monitoring device 410 is closer to the temperature of the portion of the terminal fixing seat 200 that is in direct contact with the charging terminal 300. Since the temperature of the area where the terminal fixing seat 200 is in direct contact with the charging terminal 300 is the highest temperature area in the entire charging gun, it is only necessary to ensure that the temperature there does not exceed the preset temperature to ensure that the entire charging gun is within the normal operating temperature range.

[0072] Optionally, the area where the charging terminal 300 contacts the terminal fixing seat 200 is referred to as a high temperature area. In this embodiment, the position where the heat conductive member 420 contacts the terminal fixing seat 200 is located in the high temperature area.

[0073] In order to improve the sealing performance of the cooling chamber 600, in some optional embodiments, please continue to refer to Figure 5 The charging gun further includes a sealing assembly 800. The sealing assembly 800 is sleeved on the charging terminal 300 and is used to seal the gap between the charging terminal 300 and the inner wall of the terminal fixing seat 200 to prevent the cooling medium from leaking through the gap.

[0074] To further improve the accuracy of temperature monitoring, optionally, as Figure 5 As shown, the contact position between the heat conductive member 420 and the terminal fixing seat 200 is the first contact position D1, and the contact position between the sealing assembly 800 and the terminal fixing seat 200 is the second contact position D2. The first contact position D1 and the second contact position D2 are staggered in the axial direction (i.e., the X direction) of the terminal fixing seat 200, that is, the first contact position D1 and the second contact position D2 do not overlap in the radial direction of the terminal fixing seat 200. In this way, the heat generated by the charging terminal 300 will be directly transferred to the terminal fixing seat 200, and there is no sealing assembly 800 between the contact position between the heat conductive member 420 and the terminal fixing seat 200 and the charging terminal 300. Since the material of the sealing assembly 800 is usually a material with high thermal resistance such as rubber or silicone, it is avoided that the temperature monitored by the temperature monitoring device 410 deviates greatly from the actual temperature on the terminal fixing seat 200 due to the setting of the sealing assembly 800, and the problem that the temperature of the terminal fixing seat 200 is already very high but the temperature of the charging gun power is not reduced in time will not occur, and it has high reliability.

[0075] Optionally, the charging gun usually has a temperature control system, and the temperature monitoring device 410 is connected to the temperature control system. When the temperature monitored by the temperature monitoring device 410 reaches the preset temperature, the temperature control system will automatically start to reduce the charging power and limit the temperature rise. If the temperature continues to rise and reaches the preset temperature again, the temperature control system will automatically cut off the power supply, stop charging, and wait for the temperature to drop before starting charging again. This can effectively prevent the occurrence of dangers such as spontaneous combustion or melting of the socket due to excessive temperature during charging.

[0076] In order to avoid the problem of overheating of the cable 500 due to the transmission of a large current, in some optional embodiments, the cable 500 in this embodiment is a liquid-cooled cable 500. For example, Fig.11 As shown, the cable 500 is provided with a cooling channel 510. Fig.12As shown, the cooling channel 510 has a channel opening 511 on the surface of the cable 500, and the channel opening 511 is provided at the portion of the cable 500 located in the terminal fixing seat 200, and is connected to the cooling cavity 600. In this way, the cooling medium in the cooling cavity 600 can enter the cooling channel 510 through the channel opening 511, and then flow inside the cable 500 to take away the heat generated by the cable 500, thereby cooling the cable 500. The provision of the cooling channel 510 enables the heat generating wire inside the cable 500 to directly contact the cooling medium, thereby improving the heat exchange efficiency between the cable 500 and the cooling medium, and improving the efficiency of cooling the cable 500.

[0077] Since the cooling channel 510 is provided inside the cable 500, that is, the cable 500 is designed as a hollow structure, the structural strength of the cable 500 is inevitably affected. In this embodiment, in order to improve the structural strength of the cable 500, for example, Fig.11 or Fig.12 As shown, the terminal assembly further includes a support structure 700. The support structure 700 is disposed in the cooling channel 510 and is used to support the cable 500 to improve the compression resistance of the cable 500 and improve the structural strength of the cable 500. For example, in order to ensure the supporting effect of the support structure 700, the circumferential outer wall of the support structure 700 abuts against the circumferential inner wall of the cable 500 to prevent the support structure 700 from occupying too much space in the cooling channel 510.

[0078] In order to prevent the support structure 700 from affecting the flow of the cooling medium, Fig.12 As shown, the support structure 700 in this embodiment is provided with a support through hole 710 connected to the cooling channel 510. Specifically, the support through hole 710 is arranged to penetrate the support structure 700 in the axial direction of the cable 500, so that the cooling medium outside one end of the support structure 700 can flow to the other end through the support through hole 710 without blocking the cooling channel 510.

[0079] It should be noted that by providing a support structure 700 with a support through hole 710, the inner wall of the cable 500 is supported, so that the cross-sectional size of the formed cooling channel 510 can be larger, and with the support of the support structure 700, the space for the cooling medium to flow will not be reduced due to bending or squeezing, thereby ensuring the flow of the cooling medium, so that the cooling medium can carry more heat. Exemplarily, the end of the cooling channel 510 facing away from the cold zone cavity can be connected to the cooling source. At this time, the cooling source, the cooling cavity 600 and the cooling channel 510 can form a cooling circuit. When the flow rate and flow velocity of the cooling medium in the cooling channel 510 increase, the flow rate and flow velocity in the cooling cavity 600 also increase, thereby improving the cooling effect on the charging terminal 300, thereby achieving efficient charging of the charging gun using the terminal assembly.

[0080] In some optional embodiments, the support structure 700 may be cylindrical, which has a better support effect and is convenient for manufacturing the support structure 700. In other optional embodiments, such as Fig.12 As shown, the support structure 700 may also be in a spiral shape, which can also provide a better support effect.

[0081] Exemplarily, the material of the support structure 700 may be a metal material to ensure the support effect on the cable 500. Of course, it is understandable that the support structure 700 may also be a non-metal material, and this embodiment does not limit this.

[0082] In some optional embodiments, in order to improve the overall structural strength of the charging terminal 300, the charging terminal 300 in this embodiment is an integrated structure, so as to have a higher structural strength and a lower resistance.

[0083] In some optional embodiment sets, such as Fig.11 As shown, the charging terminal 300 has a plug end 310 and a connection end 320. The plug end 310 and the connection end 320 are two ends of the charging terminal 300 in the axial direction thereof. The plug end 310 is used to be plugged into a socket of a vehicle or other device to be charged, and the connection end 320 is used to electrically connect the cable 500, for example, one end of the cable 500 is electrically connected to the connection end 320.

[0084] In some optional embodiments, such as Fig.11 As shown, the plug end 310 in this embodiment is cylindrical.

[0085] Please continue to see Fig.11 or Fig.12 , the connection end 320 includes a body portion 321 and a connection portion 322. Among them, one end of the terminal fixing seat 200 is sealed and sleeved on the body portion 321, and the body portion 321, the cable 500 and the terminal fixing seat 200 cooperate with each other to form a cooling cavity 600 connected to the cooling inlet 210. The connection portion 322 is located in the cooling cavity 600 and is used to connect the cable 500. Since the connection portion 322 of the charging terminal 300 used to connect the cable 500 is located in the cooling cavity 600, and the part where the connection portion 322 is connected to the cable 500 is the area where the largest heat is generated in the entire charging gun, in this embodiment, the cooling medium in the cooling cavity 600 can completely immerse the connection portion 322, thereby increasing the contact area between the connection portion 322 and the cooling medium, and further improving the heat transfer efficiency between the connection portion 322 and the cooling medium, so as to quickly cool down the connection portion 322 and avoid the excessive temperature of the area where the connection portion 322 is connected to the cable 500.

[0086] Further optionally, if Fig.12As shown, the main body 321 in this embodiment is cylindrical, and one end of the terminal fixing seat 200 is also cylindrical to facilitate sealing connection with the main body 321 to ensure the sealing effect. The connecting portion 322 in this embodiment is flat, and the longitudinal section size of the connecting portion 322 is smaller than the longitudinal section size of the main body 321.

[0087] In order to improve the connection effect between the cable 500 and the connecting portion 322, in one embodiment, as Fig.12 As shown, a conductive portion 520 is provided at one end of the cable 500 facing the charging terminal 300, and the conductive portion 520 is electrically connected to the connecting portion 322 to reduce the difficulty of connecting the cable 500 to the charging terminal 300. In some optional embodiments, the conductive portion 520 and the connecting portion 322 are stacked, that is, the conductive portion 520 is also in a flat block shape, and the large surface of the conductive portion 520 is in contact with the large surface of the connecting portion 322, so that the two have a larger contact area, thereby improving the connection reliability of the two. It should be noted that the conductive portion 520 in this embodiment is arranged to avoid the channel opening 511. For example, the conductive portion 520 is arranged on one side of the channel opening 511 so as not to affect the flow area of ​​the channel opening 511, thereby ensuring the flow of the cooling medium in the cooling channel 510.

[0088] In order to further improve the connection effect between the connection portion 322 and the conductive portion 520 , in this embodiment, the connection portion 322 and the conductive portion 520 are connected by ultrasonic welding to reduce the risk of connection failure.

[0089] The conductive part 520 in this embodiment is located in the cooling cavity 600, so that the conductive part 520 can be in direct contact with the cooling medium, thereby improving the effect of the cooling medium cooling the conductive part 520, reducing the risk of excessive temperature at the connection between the conductive part 520 and the connecting part 322, and increasing the maximum overcurrent that the terminal assembly can withstand, thereby improving the charging efficiency of the charging gun using the terminal assembly.

[0090] The terminal fixing seat 200 and the charging terminal 300 may be connected in various ways. This embodiment provides a connection structure between the terminal fixing seat 200 and the charging terminal 300. Specifically, Fig.12 As shown, the terminal fixing seat 200 is provided with an assembly hole 220. Fig.13 As shown, the connection end 320 of the charging terminal 300 is provided with a screw hole 323 that matches the assembly hole 220. In this embodiment, the assembly hole 220 and the screw hole 323 match each other, which means that the assembly hole 220 and the screw hole 323 are coaxially arranged. Exemplarily, the screw hole 323 is arranged on the body part 321. Fig.12As shown, the charging gun also includes a connecting bolt 910, the screw of the connecting bolt 910 passes through the assembly hole 220 and is screwed into the screw hole 323 to connect the terminal fixing seat 200 and the connecting end 320. In this way, the structure connecting the terminal fixing seat 200 and the charging terminal 300 is relatively simple, easy to assemble, and has a low cost. It should be noted that the nut of the connecting bolt 910 is in close contact with the outer wall surface of the terminal fixing seat 200, so that the terminal fixing seat 200 can be in close contact with the main body 321 of the charging terminal 300, thereby improving the sealing of the connection between the charging terminal 300 and the terminal fixing seat 200.

[0091] In some optional embodiments, in order to improve the connection effect between the terminal fixing base 200 and the charging terminal 300, a plurality of connecting bolts 910, assembly holes 220 and screw holes 323 are provided in a one-to-one correspondence, so that the terminal fixing base 200 and the charging terminal 300 have multiple connection points, further improving the connection reliability between the terminal fixing base 200 and the charging terminal 300.

[0092] It is understandable that the connection method between the terminal fixing base 200 and the charging terminal 300 is not limited to the connection through the connecting bolt 910. The terminal fixing base 200 can also be provided with an internal thread, the charging terminal 300 can be provided with an external thread, and the terminal fixing base 200 and the charging terminal 300 can be directly screwed together. This embodiment does not limit this.

[0093] The sealing performance of the terminal fixing seat 200 and the charging terminal 300 connected by the connecting bolt 910 can be further improved by providing a first sealing assembly 800. Exemplarily, the sealing assembly 800 is sleeved on the connecting end 320, for example, the sealing assembly 800 can be sleeved on the body 321.

[0094] Exemplarily, the sealing assembly 800 includes at least one sealing ring, and the material of the sealing ring is silicone, rubber, etc., which is not limited in this embodiment. The sealing assembly 800 in this embodiment includes two sealing rings, and the two sealing rings are spaced apart along the axis direction of the charging terminal 300.

[0095] Alternatively, if Fig.13 As shown, the outer peripheral surface of the body of the charging terminal 300 is provided with an annular sealing groove 330, and the sealing ring is placed in the sealing groove 330 to limit the sealing ring through the sealing groove 330 to prevent the sealing ring from axial movement.

[0096] In order to facilitate the assembly of the terminal fixing seat 200 and the charging terminal 300, in one embodiment, as shown in FIG. Fig.13As shown, the outer peripheral surface of the connection end 320 is provided with a stopper 324. When the connection end 320 includes a body part 321, the stopper 324 is provided on the body part 321. The stopper 324 is used to abut against the end surface of one end of the terminal fixing seat 200 to limit the relative position of the terminal fixing seat 200 and the charging terminal 300, that is, to limit the maximum length of the charging terminal 300 extending into the terminal fixing seat 200. In this way, on the one hand, it can ensure that the assembly positions of the terminal fixing seat 200 and the charging terminal 300 of each terminal assembly are consistent, which is convenient for batch manufacturing of terminal assemblies; on the other hand, it can avoid that the size of the cooling cavity 600 is too small due to the excessive length of the portion of the charging terminal 300 inserted into the terminal fixing seat 200, which affects the cooling effect; in addition, the terminal fixing seat 200 abuts against the stopper 324 to form a sealing structure, so that there are multiple seals between the terminal fixing seat 200 and the charging terminal 300, further improving the sealing effect.

[0097] Further optionally, the stopper portion 324 is annular in shape to increase the contact area between the stopper portion 324 and the terminal fixing seat 200 , thereby ensuring the stopper positioning effect and the sealing effect.

[0098] A sealing structure is provided between the terminal fixing seat 200 and the cable 500 to ensure the sealing of the connection between the terminal fixing seat 200 and the cable 500. In one embodiment, the sealing structure includes a sealing plug (not shown in the figure) and a waterproof ring (not shown in the figure) both of which are sleeved on the cable 500. Among them, the waterproof ring is clamped between the end face of the terminal fixing seat 200, the inner wall of the sealing plug and the outer wall of the cable 500, and has the function of waterproof sealing. One end of the sealing plug in the axial direction is in close contact with the outer wall of the cable 500, the other end is in close contact with the outer wall of the terminal fixing seat 200, and the middle part is in close contact with the outer wall of the waterproof ring, so as to realize the connection and sealing between the terminal fixing seat 200 and the cable 500, and has a good sealing effect.

[0099] One end of the terminal fixing seat 200 in the axial direction is connected to the connection end 320 of the charging terminal 300, and the other end is connected to the cable 500, so that the cooling inlet 210 of the terminal fixing seat 200 needs to be arranged on one side of the terminal fixing seat 200. In this embodiment, in order to facilitate the connection of the cooling inlet 210 with the pipeline, for example, Fig.12 and Fig.14As shown, the terminal fixing seat 200 includes a cavity body 240 and an adapter structure 250. The adapter structure 250 is connected to one side of the cavity body 240, and the adapter structure 250 has a connecting flow channel 251 connected to the cooling cavity 600, and the connecting flow channel 251 is connected to the cooling inlet 210, so that the cooling medium enters the cooling cavity 600 through the connecting flow channel 251. Among them, one end of the cavity body 240 is sealed and sleeved on the connecting end 320, and the other end of the cavity body 240 is sealed and sleeved on the cable 500. The cavity body 240, the charging terminal 300 and the cable 500 cooperate with each other to form the cooling cavity 600. By setting the adapter structure 250, and providing the connecting flow channel 251 in the adapter structure 250, the setting position of the cooling inlet 210 is more flexible, so as to facilitate the connection of the pipeline and reduce the difficulty of assembly.

[0100] It should be noted that the transfer structure 250 and the cavity body 240 in this embodiment are an integrated structure to have a higher structural strength.

[0101] Further optionally, if Fig.11 As shown, the connecting flow channel 251 includes a first section 2511 and a second section 2512 arranged at an angle, and the second section 2512 can be arranged coaxially with the cooling inlet 210. Among them, the flow channel opening of the first section 2511 facing away from the second section 2512 is connected to the cooling cavity 600. In this way, the extension direction of the second section 2512 can be the axial direction of the cavity body 240, so that the extension direction of the pipeline connecting the cooling inlet 210 is roughly the same as the extension direction of the cable 500, so as to reduce the space required to be occupied by the charging gun using the terminal assembly in the radial direction, thereby improving the miniaturization of the charging gun.

[0102] In some optional embodiments, such as Fig.11 or Fig.12 As shown, the terminal fixing seat 200 also includes a sealing joint 260, which is sealed at the flow channel opening of the connecting flow channel 251 away from the cooling chamber 600, and the cooling inlet 210 is provided at the sealing joint 260 and connected to the connecting flow channel 251. By providing the sealing joint 260, the connection and communication between the terminal fixing seat 200 and the pipeline can be facilitated. The axial direction of the sealing joint 260 in this embodiment is the same as the axial direction of the second section 2512. For example, the sealing structure and the second section 2512 can be coaxially arranged.

[0103] Exemplarily, a sealing hole 252 is provided on the surface of the transition structure 250 facing away from the cavity body 240, and the sealing hole 252 is connected to the second section 2512. The terminal fixing seat 200 also includes a sealing screw 270 that is sealed and screwed into the sealing hole 252. When the cooling medium in the cooling cavity 600 needs to be released, the sealing screw 270 is removed from the sealing hole 252. At this time, the cooling medium in the cooling cavity 600 flows out through the first section 2511, the second section 2512 and the sealing hole 252, so that the terminal fixing seat 200 is emptied.

[0104] Optionally, the cavity body 240 and the charging terminal 300 in this embodiment can be coaxially connected or non-coaxially connected, which is not limited in this embodiment. The cavity body 240 and the cable 500 can be coaxially connected or non-coaxially connected, which is not limited in this embodiment.

[0105] In the charging gun provided in this embodiment, a cylindrical support structure 700 is provided in the center of the cable 500 to ensure the smooth flow of the cooling medium inside the cable 500. By providing a terminal fixing seat 200 made of metal material, the pressure resistance of the terminal assembly can be effectively improved. The connecting portion 322 of the charging terminal 300 and the conductive portion 520 of the cable 500 are both located in the cooling cavity 600, which improves the effect of the cooling medium cooling the conductive portion 520 and the connecting portion 322, reduces the risk of excessive temperature at the connection between the conductive portion 520 and the connecting portion 322, and increases the maximum overcurrent that the terminal assembly can withstand, thereby improving the charging efficiency of the charging gun using the terminal assembly.

[0106] For example, Fig.15 and Fig.16 A charging gun provided in this embodiment includes a head structure 1 and a tail structure 2. The cable 500 of the head structure 1 is electrically connected to the cable 500 of the tail structure 2, and the cooling channels 510 of the two connected cables 500 are connected to form a cooling circuit.

[0107] For example, Fig.15 As shown, the head structure 1 includes two charging terminals 300, and the tail structure 2 also has a charging terminal 300 and a terminal fixing seat 200. The tail structure 2 may be provided with a temperature monitoring component 400 and a gun body 100, or may not be provided with a temperature monitoring component 400 and a gun body 100, which is not limited in this embodiment.

[0108] In one embodiment, the charging gun further includes a collecting cavity 4, which is disposed between the head structure 1 and the tail structure 2, for example, can be sleeved on the outside of the cable 500. The cooling inlet 210 of each terminal fixing seat 200 is connected to the collecting cavity 4 through a pipeline (not shown in the figure), so that the collecting cavity, the pipeline, the cooling cavity 600 and the cooling channel 510 form a cooling circuit.

[0109] Exemplarily, each end of the confluence cavity is connected to a main pipeline 31, the cooling inlet 210 of the two terminal fixing seats 200 of the head structure 1 is connected to one of the main pipelines 31 through a tee 5 and two branch pipelines 32, and the cooling inlet 210 of the two terminal fixing seats 200 of the tail structure 2 is also connected to the other main pipeline 31 through a tee 5 and two branch pipelines 32.

[0110] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A charging gun, characterized in that: include: Gun body (100); A terminal fixing seat (200), the terminal fixing seat (200) being arranged in the gun body (100), and the outer peripheral wall of the terminal fixing seat (200) and the gun body (100) cooperate with each other to surround and form a temperature detection hole (10); A charging terminal (300), one end of the charging terminal (300) being arranged on the terminal fixing seat (200); The temperature monitoring assembly (400) comprises a temperature monitoring device (410) and a heat conducting member (420) sleeved outside the temperature monitoring device (410); the heat conducting member (420) is located in the temperature detection hole (10) and abuts against both the temperature monitoring device (410) and the terminal fixing seat (200).

2. The charging gun according to claim 1, characterized in that: The heat-conducting member (420) comprises a connected heat-conducting structure and an elastic deformation body (422), wherein the heat-conducting structure is connected to the temperature monitoring device (410), and the elastic deformation body (422) protrudes in a direction away from the temperature monitoring device (410) and abuts against the terminal fixing seat (200).

3. The charging gun according to claim 2, characterized in that: The elastic deformation body (422) includes a plurality of elastic strips (4221), each of the elastic strips (4221) protruding in a direction away from the temperature monitoring device (410); or, The elastic deformation body (422) is an integrated structure.

4. The charging gun according to claim 2, characterized in that: The heat-conducting structure is a ring body (421) sleeved on the temperature monitoring device (410), and two heat-conducting structures are arranged opposite to each other, and the elastic deformation body (422) is connected between the two heat-conducting structures; and / or, The heat-conducting structure is a ring body (421) sleeved on the temperature monitoring device (410), and one end of the heat-conducting structure is bent inward to form a bent portion (423), and the bent portion (423) abuts against an end surface of one end of the temperature monitoring device (410).

5. The charging gun according to any one of claims 1 to 3, characterized in that: The heat conducting member (420) is made of metal; and / or the terminal fixing seat (200) is made of metal.

6. The charging gun according to any one of claims 1 to 3, characterized in that: The terminal fixing seat (200) is tubular, and a cooling inlet (210) is provided on a side wall of the terminal fixing seat (200). The charging gun further comprises a cable (500), the charging terminal (300) is plugged into one end of the terminal fixing seat (200), and the cable (500) is plugged into the other end of the terminal fixing seat (200), and the charging terminal (300), the cable (500) and the terminal fixing seat (200) cooperate with each other to form a cooling cavity (600) connected to the cooling inlet (210), and a cooling medium is provided in the cooling cavity (600).

7. The charging gun according to claim 6, characterized in that: The heat conducting member (420) and the charging terminal (300) are arranged opposite to each other in the radial direction of the terminal fixing seat (200).

8. The charging gun according to claim 6, characterized in that: The cable (500) is provided with a cooling channel (510), the cooling channel (510) having a channel opening (511) on the surface of the cable (500), the channel opening (511) being provided at a portion of the cable (500) located inside the terminal fixing seat (200) and being connected to the cooling cavity (600).

9. The charging gun according to claim 8, characterized in that: The charging gun further comprises a supporting structure (700), wherein the supporting structure (700) is arranged in the cooling channel (510) and is provided with a supporting through hole (710) connected to the cooling channel (510), and the supporting structure (700) is used to support the cable (500).

10. The charging gun according to claim 6, characterized in that: The charging gun also includes a sealing component (800), which is sleeved on the charging terminal (300) and is used to seal the gap between the charging terminal (300) and the inner wall of the terminal fixing seat (200); the contact position between the heat conductive member (420) and the terminal fixing seat (200) is a first contact position, and the contact position between the sealing component (800) and the terminal fixing seat (200) is a second contact position, and the first contact position and the second contact position are staggered in the axial direction of the terminal fixing seat (200).

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