Charging gun

Abstract

The utility model 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 utility model, the risk of overhigh temperature is reduced, the situation that the gun body or the terminal fixing seat is heated and melted is further prevented, and the charging gun has relatively high reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to charging technology field especially, relate to a charging gun. BACKGROUND

[0002] The charging of new energy electric vehicle needs to use the charging gun, and the charging plug of the charging gun can be inserted into the socket of the new energy electric vehicle to realize the 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 position where the charging terminal is connected with the cable. In order to avoid the risk of self-ignition of the charging gun or melting of the main body of the charging gun caused by the excessively high temperature of the charging terminal, the charging gun usually has a temperature control system. The temperature control system collects the temperature of the charging gun through a temperature monitoring device, and controls the charging function of the charging gun when the temperature of the charging gun is too high, so as to reduce the heat generation of the charging terminal and ensure the safe charging of the charging gun. Specifically, the charging terminal is arranged in a cavity formed by the main body of the charging gun, and the temperature monitoring device is arranged in another cavity formed by the main body of the charging gun and fixed by sealing glue. In addition, the material of the main body of the charging gun is usually plastic.

[0004] The heat generated by the charging terminal is first transferred to the main body of the charging gun, then transferred to the sealing glue through the main body of the charging gun, and finally transferred to the temperature monitoring device. The thermal resistance of the sealing glue and the main body of the charging gun made of plastic is relatively large, which results in a large deviation between the temperature detected by the temperature monitoring device and the actual temperature of the structure around the charging terminal, and the risk of excessively high temperature of the charging gun is relatively large, and the reliability is relatively low. SUMMARY

[0005] The utility model aims at providing a kind of charging gun, to solve the problem of easy temperature excessively high, poor reliability in prior art.

[0006] As conceived above, the technical scheme adopted by the utility model is as follows:

[0007] The charging gun comprises:

[0008] Gun body;

[0009] Terminal fixed seat, the terminal fixed seat is arranged in the gun body, and the outer peripheral wall of the terminal fixed seat is cooperated with the gun body to form a temperature detection hole;

[0010] Charging terminal, one end of the charging terminal is arranged in the terminal fixed seat;

[0011] Temperature monitoring assembly, comprising temperature monitoring device and heat conducting piece sleeved outside the temperature monitoring device, the heat conducting piece is located in the temperature detection hole, and is in abutment with the temperature monitoring device and the terminal fixed seat.

[0012] In one of the embodiments, the heat-conducting member comprises a heat-conducting structure connected to the temperature monitoring device and an elastically deformable body protruding in a direction away from the temperature monitoring device and abutting against the terminal fixing seat.

[0013] In one of the embodiments, the elastically deformable body comprises a plurality of elastic strips each protruding in a direction away from the temperature monitoring device; or,

[0014] The elastically deformable body is of an integral structure.

[0015] In one of the embodiments, the heat-conducting structure is a ring body sleeved on the temperature monitoring device, and two of the heat-conducting structures are oppositely arranged, and the elastically deformable 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 inwardly and forms a bent portion, and the bent portion abuts against an end surface of one end of the temperature monitoring device.

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

[0018] In one of the embodiments, the terminal fixing seat is in a tubular shape, and a side wall of the terminal fixing seat is provided with a cooling inlet, the charging gun further comprises a cable, the charging terminal is inserted into one end of the terminal fixing seat, the cable is inserted into the other end of the terminal fixing seat, and the charging terminal, the cable and the terminal fixing seat cooperatively form a cooling cavity communicating with the cooling inlet, and the cooling cavity is provided with a cooling medium.

[0019] In one of the embodiments, the heat-conducting member and the charging terminal are oppositely arranged in a 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 a surface of the cable, the channel opening is arranged on a portion of the cable located in the terminal fixing seat and communicates with the cooling cavity.

[0021] In one of the embodiments, the charging gun further comprises a support structure arranged in the cooling channel and provided with a support through hole communicating with the cooling channel, and the support structure is used for supporting the cable.

[0022] In one of the embodiments, the charging gun further comprises a sealing assembly sleeved on the charging terminal and used for sealing the gap between the charging terminal and the inner wall of the terminal fixing seat; the contact position of the heat conduction member with the terminal fixing seat is a first contact position, the contact position of the sealing assembly with the terminal fixing seat is a second contact position, and the first contact position and the second contact position are arranged staggeredly in the axial direction of the terminal fixing seat.

[0023] The utility model discloses beneficial effect has:

[0024] The utility model provides a charging gun, one end of charging terminal is arranged in terminal fixing seat, and the terminal fixing seat and gun body are mutually cooperated and surround and form the temperature detection hole for installing temperature monitoring component, and temperature monitoring component is directly contacted with terminal fixing seat, so that temperature monitoring component can directly monitor the temperature of terminal fixing seat, to avoid the situation that the temperature of terminal fixing seat is too high, and temperature monitoring component includes temperature monitoring device and heat conduction member, and the heat on terminal fixing seat can be transferred to heat conduction member, so that the temperature of heat conduction member is same or approximately same with the temperature of terminal fixing seat, and the temperature of heat conduction member monitored by temperature monitoring device can be considered as the temperature of terminal fixing seat, improve the accuracy of monitoring the temperature of terminal fixing seat, reduce the quantity of the component between terminal fixing seat and temperature monitoring device, and then make the thermal resistance between terminal fixing seat and temperature monitoring device can be smaller, make the deviation between the temperature monitored by temperature monitoring device and the actual temperature at terminal fixing seat smaller, reduce the risk that charging gun appears temperature too high, and then prevent the situation that gun body or terminal fixing seat is heated and fused, have higher reliability. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will introduce the drawings needed to be used in the embodiment of the utility model briefly, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, under the premise of not paying the creative labor, other drawings can also be obtained according to the content of the embodiment of the utility model and these drawings.

[0026] Figure 1 It is the first structure schematic drawing of charging gun provided by the embodiment of the utility model;

[0027] Figure 2 It is the exploded structure schematic drawing of charging gun provided by the embodiment of the utility model;

[0028] Figure 3 It is the first part schematic drawing of charging gun provided by the embodiment of the utility model;

[0029] Figure 4is a second part schematic view of the charging gun provided by the embodiment of the utility model;

[0030] Figure 5 is the A-A section view of the utility model Figure 4 as shown in the structure schematic view of the utility model;

[0031] Figure 6 is the structure schematic view of the support part provided by the embodiment of the utility model;

[0032] Figure 7 is the exploded view of part charging gun provided by the embodiment of the utility model;

[0033] Figure 8 is the structure schematic view of the heat conducting piece provided by the embodiment of the utility model;

[0034] Figure 9 is the first structure schematic view of the charging terminal, terminal fixed seat and cable provided by the embodiment of the utility model;

[0035] Figure 10 is the second structure schematic view of the charging terminal, terminal fixed seat and cable provided by the embodiment of the utility model;

[0036] Figure 11 is the section view of the structure of the utility model Figure 9 as shown;

[0037] Figure 12 is the exploded view of the structure of the utility model Figure 9 as shown;

[0038] Figure 13 is the structure schematic view of the charging terminal provided by the embodiment of the utility model;

[0039] Figure 14 is the structure schematic view of the terminal fixed seat provided by the embodiment of the utility model;

[0040] Figure 15 is the second structure schematic view of the charging gun provided by the embodiment of the utility model;

[0041] Figure 16 is the third structure schematic view of the charging gun provided by the embodiment of the utility model.

[0042] In the figure:

[0043] 100, gun body; 110, main body part; 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, adapter 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-in end; 320, connecting end; 321, main body part; 322, connecting part; 323, screw hole; 324, stop part; 330, sealing groove; 400, temperature monitoring assembly; 410, temperature monitoring device; 420, heat conduction piece; 421, ring body; 422, elastic deformation body; 4221, elastic strip; 423, bending part; 500, cable; 510, cooling channel; 511, channel opening; 520, conductive part; 600, cooling cavity; 700, support structure; 710, support 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, collection cavity; 5, tee. DETAILED DESCRIPTION

[0044] To make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific embodiments. It can be understood that the specific embodiments described herein are merely used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all.

[0045] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0046] In the description of the present application, unless otherwise explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature is on, above and on of second feature includes that first feature is directly above and obliquely above of second feature, or only indicates that horizontal height of first feature is higher than second feature. First feature is under, below and under of second feature includes that first feature is directly below and obliquely below of second feature, or only indicates that horizontal height of first feature is less than second feature. In the description of the embodiment, if not special statement, "multiple" specifically refers to two or more than two.

[0048] In the description of the embodiment, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, only for the convenience of description and simplification of operation, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "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 "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element.

[0050] The technical scheme of the utility model will be further illustrated below by combining with the drawings and through specific embodiments.

[0051] The embodiment provides a charging gun, which can improve temperature monitoring accuracy, avoid the case that the temperature of the charging gun is too high, and has high reliability. The charging gun provided by the embodiment can be used for charging new energy electric vehicles.

[0052] As shown in Figures 1 to 8 The charging gun comprises a gun body 100, a terminal fixing seat 200, a charging terminal 300 and a temperature monitoring assembly 400.

[0053] The gun body 100 in the embodiment is the main structure of the charging gun, and is used for supporting or containing the terminal fixing seat 200, the charging terminal 300 and the temperature monitoring assembly 400. In some optional embodiments, as shown in Figure 2As shown, the gun body 100 includes a main body part 110 and a support part 120 fixedly arranged in the main body part 110. One end of the main body part 110 is a plug end for being inserted into a socket of a new energy electric vehicle. The support part 120 is used to support the structure inside the main body part 110. Exemplarily, the materials of the main body part 110 and the support part 120 can be plastic or other hard non-metallic materials, so as not to cause electric leakage and have higher safety.

[0054] The terminal fixing seat 200 in the embodiment is used to fix the charging terminal 300. Specifically, the terminal fixing seat 200 is arranged in the gun body 100 and fixed relative to the position of the gun body 100, so that the position of the charging terminal 300 is fixed relative to the gun body 100. Optionally, the material of the terminal fixing seat 200 in the embodiment can be a metal material, so as 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, but can also be a non-metallic material with a high heat transfer coefficient, and the embodiment does not limit this.

[0055] Exemplarily, as shown in Figure 6 , the support part 120 is provided with a first mounting groove 121, and the first mounting groove 121 and the main body part 110 cooperatively form a mounting space, and the terminal fixing seat 200 is fixedly mounted in the mounting space.

[0056] In an implementable manner, as shown in Figure 7 , the outer peripheral wall of the terminal fixing seat 200 cooperates with the gun body 100 to form a temperature detection hole 10, and the temperature detection hole 10 is used to mount a temperature monitoring assembly 400. Specifically, the temperature detection hole 10 in the embodiment is formed by the support part 120 and the terminal fixing seat 200 cooperating with each other. Exemplarily, as shown in Figure 6 , the groove wall of the first mounting groove 121 is provided with a second mounting groove 122, and when the terminal fixing seat 200 is located in the first mounting groove 121, the outer peripheral wall of the terminal fixing seat 200 tightly abuts against the groove opening of the second mounting groove 122, so as to cooperatively form the temperature detection hole 10 with the second mounting groove 122, so that part of the hole wall of the temperature detection hole 10 is formed by the terminal fixing seat 200.

[0057] As shown in Figure 4 and Figure 5 , one end of the charging terminal 300 is fixedly arranged in 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 with the terminal of the socket of the new energy electric vehicle, thereby realizing the transmission of electric energy.

[0058] Exemplarily, please continue to refer to Figure 5The temperature monitoring assembly 400 comprises a temperature monitoring device 410 and a heat conduction member 420 sleeved outside the temperature monitoring device 410. The heat conduction member 420 is located in the temperature detection hole 10 and abuts against the temperature monitoring device 410 and the terminal fixing seat 200. The heat conduction member 420 is configured to transmit the heat of the terminal fixing seat 200 to the temperature monitoring device 410, in particular 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 relatively high, it indicates that the temperature of the charging terminal 300 has been very high. At this time, the charging power of the charging gun needs to be reduced 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 conduction member 420 in the embodiment has high heat conduction performance to transmit the temperature of the terminal fixing seat 200 to the temperature monitoring device 410.

[0059] Optionally, the temperature monitoring device 410 in the embodiment can be an ntc temperature sensor or other temperature sensor, which is not limited in the embodiment.

[0060] The charging gun provided by the embodiment is characterized in that one end of the charging terminal 300 is arranged in the terminal fixing seat 200, the terminal fixing seat 200 and the gun body 100 cooperatively surround to form a temperature detection hole 10 for mounting the temperature monitoring assembly 400, and the temperature monitoring assembly 400 directly contacts the terminal fixing seat 200, so that the temperature monitoring assembly 400 can directly monitor the temperature of the terminal fixing seat 200 to avoid the case that the temperature of the terminal fixing seat 200 is too high. In addition, the temperature monitoring assembly 400 comprises a temperature monitoring device 410 and a heat conduction member 420. The heat on the terminal fixing seat 200 can be transmitted to the heat conduction member 420, so that the temperature of the heat conduction member 420 is the same as or approximately the same as the temperature of the terminal fixing seat 200. The temperature of the heat conduction member 420 monitored by the temperature monitoring device 410 can be considered as the temperature of the terminal fixing seat 200, which improves the accuracy of monitoring the temperature of the terminal fixing seat 200, reduces the number of components between the terminal fixing seat 200 and the temperature monitoring device 410, and further makes the thermal resistance between the terminal fixing seat 200 and the temperature monitoring device 410 smaller. As a result, the deviation between the temperature monitored by the temperature monitoring device 410 and the actual temperature at the terminal fixing seat 200 is smaller, which reduces the risk of the charging gun being too hot, and further prevents the gun body 100 or the terminal fixing seat 200 from being melted by heat, thereby having high reliability.

[0061] In one embodiment, the charging gun comprises at least two charging terminals 300, and the number of terminal fixing seats 200 is the same as the number of charging terminals 300, and the terminal fixing seat 200 is used for fixing the corresponding charging terminal 300. The number of temperature monitoring assemblies 400 is the same as the number of terminal fixing seats 200, and the heat conduction member 420 of the temperature monitoring assembly 400 is in abutment with 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 the present embodiment show a schematic view of the charging gun comprising two charging terminals 300.

[0062] The structure of the heat conduction member 420 can be various. In one embodiment, as shown in Figure 7 and Figure 8 , the heat conduction member 420 comprises heat conduction structures (not shown in the drawings) connected with each other and an elastic deformation body 422. The heat conduction 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 conduction 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 the direction perpendicular to the axis direction of the temperature monitoring device 410, so as to be in abutment with the terminal fixing seat 200, so that the elastic deformation body 422 can be tightly in abutment with 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 embodiment, as shown in Figure 7 , the heat conduction structure is a ring body 421 sleeved on the temperature monitoring device 410, and the heat conduction structure is oppositely arranged in two, and the elastic deformation body 422 is connected between the two heat conduction structures. In the present embodiment, the two ring bodies 421 are oppositely arranged in 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 conduction structure is a ring body 421 sleeved on the temperature monitoring device 410, as shown in Figure 5 and Figure 8As shown, one end of the heat-conducting structure is bent towards the inside and forms 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, the monitoring end of the temperature monitoring device 410), and the bent portion 423 abuts against 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 the 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. Moreover, when assembling the heat-conducting member 420 and the temperature monitoring device 410, one end of the heat-conducting member 420 away from the bent portion 423 can be inserted into the heat-conducting member 420 until the bent portion 423 contacts the end surface of the temperature monitoring device 410, facilitating the assembly of the two. In addition, when the assembled heat-conducting member 420 and temperature monitoring device 410 are inserted into the temperature detection hole 10, since the heat-conducting member 420 is relatively short relative to the temperature monitoring device 410, the temperature monitoring device 410 usually needs to be gripped to be inserted into the temperature detection hole 10. Due to the presence of the bent portion 423, the temperature monitoring device 410 does not protrude from the end where the bent portion 423 is located during the insertion process, ensuring the uniqueness of the relative position of the temperature monitoring device 410 and the heat-conducting member 420.

[0065] In one embodiment, please continue to refer to 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 sequentially and spaced apart along the circumferential direction of the heat-conducting structure. Some of the plurality of elastic strips 4221 abut against the gun body 100, and the other elastic strips 4221 abut against the terminal fixing seat 200. By arranging the plurality of elastic strips 4221, there is a gap between the elastic strips 4221, so that the elastic strips 4221 have a large deformation space in the direction perpendicular to the axis 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 the plurality of elastic strips 4221, but is an integral structure in the shape of a cylinder, so as to have higher structural strength.

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

[0068] Optionally, the heat-conducting member 420 is made of metal material, which has high thermal conductivity and high structural strength and ductility, and thus has a long service life.

[0069] As shown in Figure 5 , the terminal fixing seat 200 is tubular, and as shown in Figure 9 and Figure 10 , the side wall of the terminal fixing seat 200 is provided with a cooling inlet 210. The charging gun further comprises a cable 500, the charging terminal 300 is sealingly plugged into one end of the terminal fixing seat 200, and the cable 500 is sealingly plugged into the other end of the terminal fixing seat 200. The charging terminal 300, the cable 500 and the terminal fixing seat 200 cooperatively form a cooling cavity 600 communicating with the cooling inlet 210, and the cooling cavity 600 is provided with a cooling medium for cooling the charging terminal 300 and the cable 500. It should be noted that the cooling medium in the cooling cavity 600 communicates with the cooling system outside to cool the charging gun.

[0070] The charging gun provided by the embodiment can make the cooling medium in the cooling cavity 600 timely take away the heat on the charging terminal 300, the cable 500 and the terminal fixing seat 200, improve 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, and thus the charging efficiency of the charging gun will not be limited, and the charging time of the charging gun is shortened.

[0071] In one implementation mode, as shown in Figure 5 , the heat-conducting member 420 is arranged opposite to the charging terminal 300 in the radial direction of the terminal fixing seat 200. The radial direction of the terminal fixing seat 200 is the opposite direction perpendicular to the axial direction of the terminal fixing seat 200, and the axial direction of the terminal fixing seat 200 is the X direction in Figure 5 . By arranging the heat-conducting member 420 opposite to the charging terminal 300 in the radial direction of the terminal fixing seat 200, the heat-conducting member 420 can transfer the heat of the part of the terminal fixing seat 200 directly contacting 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 part of the terminal fixing seat 200 directly contacting the charging terminal 300. Since the area of the terminal fixing seat 200 directly contacting the charging terminal 300 has the highest temperature in the charging gun, as long as the temperature of this area does not exceed the preset temperature, the entire charging gun can be ensured to be within the normal working 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 part, and in the embodiment, the position where the heat-conducting member 420 contacts the terminal fixing seat 200 is located in the high-temperature area part.

[0073] To improve the sealing performance of the cooling cavity 600, in some optional embodiments, please continue to refer to Figure 5 , the charging gun further comprises 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 shown in Figure 5 , the contact position of the heat-conducting member 420 with the terminal fixing seat 200 is a first contact position D1, and the contact position of the sealing assembly 800 with the terminal fixing seat 200 is a second contact position D2. The first contact position D1 and the second contact position D2 are staggered in the axial direction of the terminal fixing seat 200 (i.e., the X direction), that is, the first contact position D1 and the second contact position D2 do not coincide in the radial direction of the terminal fixing seat 200. In this way, the heat generated by the charging terminal 300 is directly transmitted to the terminal fixing seat 200, and there is no sealing assembly 800 between the position where the heat-conducting member 420 contacts the terminal fixing seat 200 and the charging terminal 300. Since the material of the sealing assembly 800 is usually rubber, silicone or other materials with high thermal resistance, the situation 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 is avoided, and thus the problem that the temperature of the terminal fixing seat 200 is already very high but the charging gun power is not reduced in time is not caused, which has high reliability.

[0075] Optionally, the charging gun usually has a temperature control system, and the temperature monitoring device 410 is in communication connection with the temperature control system. When the temperature monitored by the temperature monitoring device 410 reaches a preset temperature, the temperature control system will automatically start to reduce the charging power to 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 to stop charging and wait for the temperature to fall again before starting charging again. In this way, the occurrence of dangerous situations such as self-ignition or socket melting due to excessively high temperature during charging can be effectively prevented.

[0076] To avoid the problem that the cable 500 has excessively high temperature due to transmission of large current, in some optional embodiments, the cable 500 in the embodiment is a liquid-cooled cable 500. For example, as shown in Figure 11 , the cable 500 is provided with a cooling channel 510, and as shown in Figure 12As shown, the cooling channel 510 has a channel opening 511 on the surface of the cable 500, which is located at the portion of the cable 500 in the terminal fixing seat 200 and is communicated with 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 achieving cooling of the cable 500. The provision of the cooling channel 510 enables the wires 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 arranged inside the cable 500, that is, the cable 500 is designed as a hollow structure, the structural strength of the cable 500 will inevitably be affected. In this embodiment, in order to improve the structural strength of the cable 500, the cable 500 is designed as a hollow structure, and the cable 500 is provided with a plurality of reinforcing structures 520 arranged inside the cable 500. Figure 11 or Figure 12 As shown, the terminal assembly further includes a support structure 700. The support structure 700 is arranged 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 make the support structure 700 not affect the flow of the cooling medium, as shown in the drawings, Figure 12 the support structure 700 in this embodiment is provided with a support through hole 710 which is communicated with the cooling channel 510. Specifically, the support through hole 710 is arranged through 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 arranging the support structure 700 with the support through hole 710, the inner wall of the cable 500 is supported, so that the cross-sectional size of the cooling channel 510 formed can be larger, and with the support of the support structure 700, the space for the flow of the cooling medium will not be reduced due to bending or extrusion, which ensures the flow of the cooling medium and enables the cooling medium to carry more heat. As an example, one end of the cooling channel 510 away from the cold region cavity can be communicated with a cooling source. At this time, the cooling source, the cooling cavity 600 and the cooling channel 510 can form a cooling loop. When the flow and flow rate of the cooling medium in the cooling channel 510 increase, the flow and flow rate in the cooling cavity 600 also increase, thereby improving the cooling effect of the charging terminal 300, so as to realize efficient charging of the charging gun using the terminal assembly.

[0080] In some optional embodiments, the support structure 700 can be in a cylindrical shape, has a good support effect, and is convenient for manufacturing the support structure 700. In some other optional embodiments, as shown in Figure 12 the support structure 700 can also be in a spiral shape, and also has a good support effect.

[0081] For example, the material of the support structure 700 can be a metal material to ensure the support effect on the cable 500. Of course, it can be understood that the support structure 700 can also be a non-metal material, and the present 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 the present embodiment is in an integrated structure, so as to have a higher structural strength and also have a lower resistance.

[0083] In some optional embodiments, as shown in Figure 11 the charging terminal 300 has a plug-in end 310 and a connecting end 320. The plug-in end 310 and the connecting end 320 are two end portions of the charging terminal 300 in the axial direction. The plug-in end 310 is used for plugging into a socket of a vehicle or other device to be charged, and the connecting end 320 is used for electrically connecting the cable 500, for example, one end of the cable 500 is electrically connected to the connecting end 320.

[0084] In some optional embodiments, as shown in Figure 11 the plug-in end 310 in the present embodiment is in a cylindrical shape.

[0085] Please continue to refer to Figure 11 or Figure 12 the connecting end 320 includes a body portion 321 and a connecting portion 322. One end of the terminal fixing seat 200 is sealingly sleeved on the body portion 321, and the body portion 321, the cable 500 and the terminal fixing seat 200 cooperatively form the cooling cavity 600 which is in communication with the cooling inlet 210. The connecting portion 322 is located in the cooling cavity 600 and is used for connecting the cable 500. Since the connecting portion 322 of the charging terminal 300 for connecting the cable 500 is located in the cooling cavity 600, and the part of the connecting portion 322 connected with the cable 500 is the area with the largest heat generation in the entire charging gun, in the present embodiment, the cooling medium in the cooling cavity 600 can completely immerse the connecting portion 322, thereby increasing the contact area of the connecting portion 322 with the cooling medium, and further improving the heat transfer efficiency of the connecting portion 322 with the cooling medium, so as to quickly cool the connecting portion 322 and avoid the temperature of the area where the connecting portion 322 is connected with the cable 500 being too high.

[0086] Further optionally, as shown in Figure 12As shown, the body part 321 in the embodiment is in a cylindrical shape, and correspondingly, one end of the terminal fixing seat 200 is also in a cylindrical shape, so as to be sealingly connected with the body part 321 and ensure the sealing effect. The connecting part 322 in the embodiment is in a flat block shape, and the longitudinal cross-sectional dimension of the connecting part 322 is smaller than that of the body part 321.

[0087] In order to improve the connection effect of the cable 500 and the connecting part 322, in an implementable manner, as shown in Figure 12 As shown, the cable 500 is provided with a conductive part 520 at one end thereof, and the conductive part 520 is electrically connected with the connecting part 322, so as to reduce the connection difficulty of the cable 500 and the charging terminal 300. In some optional embodiments, the conductive part 520 and the connecting part 322 are arranged in a stacked manner, that is, the conductive part 520 is also in a flat block shape, and the large face of the conductive part 520 is in contact with the large face of the connecting part 322, so as to have a larger contact area and improve the connection reliability. It should be noted that the conductive part 520 in the embodiment is arranged to avoid the channel opening 511, for example, the conductive part 520 is arranged at one side of the channel opening 511, so as not to affect the flow area of the channel opening 511 and ensure the flow of the cooling medium in the cooling channel 510.

[0088] In order to further improve the connection effect of the connecting part 322 and the conductive part 520, in the embodiment, the connecting part 322 and the conductive part 520 are connected in an ultrasonic welding manner, so as to reduce the risk of connection failure.

[0089] The conductive part 520 in the embodiment is located in the cooling cavity 600, so that the conductive part 520 can be directly contacted with the cooling medium, the cooling effect of the cooling medium on the conductive part 520 is improved, the risk of excessively high temperature at the connection between the conductive part 520 and the connecting part 322 is reduced, the maximum overcurrent that can be borne by the terminal assembly is improved, and the charging efficiency of the charging gun using the terminal assembly is improved.

[0090] The connection manner of the terminal fixing seat 200 and the charging terminal 300 can be various, and the embodiment provides a connection structure of the terminal fixing seat 200 and the charging terminal 300. Specifically, as shown in Figure 12 As shown, the terminal fixing seat 200 is provided with an assembly hole 220, as shown in Figure 13 As shown, the connecting end 320 of the charging terminal 300 is provided with a threaded hole 323 matched with the assembly hole 220. In the embodiment, the assembly hole 220 and the threaded hole 323 are coaxially arranged. For example, the threaded hole 323 is arranged on the body part 321. As shown in Figure 12As shown, the charging gun also includes a connecting bolt 910. The threaded part of the connecting bolt 910 passes through the mounting hole 220 and is screwed into the threaded hole 323 to connect the terminal fixing seat 200 and the connecting end 320. Thus, the structure of the connecting terminal fixing seat 200 and the charging terminal 300 is relatively simple, easy to assemble, and has a lower 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 and the body part 321 of the charging terminal 300 can be in close contact, improving the sealing performance 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, multiple connecting bolts 910, mounting holes 220 and screw holes 323 are provided one by one, so that the terminal fixing base 200 and the charging terminal 300 have multiple connection points, thereby further improving the connection reliability between the terminal fixing base 200 and the charging terminal 300.

[0092] It is understood that the connection between the terminal fixing base 200 and the charging terminal 300 is not limited to the connection by the connecting bolt 910. Alternatively, the terminal fixing base 200 may have an internal thread, the charging terminal 300 may have an external thread, and the terminal fixing base 200 and the charging terminal 300 may be directly screwed together. This embodiment does not limit this.

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

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

[0095] Optionally, such as Figure 13 As shown, the outer circumferential surface 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 and prevent it from moving axially.

[0096] To facilitate the assembly of the terminal holder 200 and the charging terminal 300, in one embodiment, such as Figure 13As shown, the outer peripheral surface of the connecting end 320 is provided with a stop portion 324. When the connecting end 320 includes the body portion 321, the stop portion 324 is provided on the body portion 321. The stop portion 324 abuts against the end face 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 be ensured that the assembly positions of the terminal fixing seat 200 and the charging terminal 300 of each terminal assembly are consistent, facilitating mass production of the terminal assembly; on the other hand, it avoids the cooling cavity 600 from being too small due to the charging terminal 300 being inserted too long into the terminal fixing seat 200, thus affecting the cooling effect; in addition, the abutment between the terminal fixing seat 200 and the stop portion 324 can form a sealing structure, providing multiple seals between the terminal fixing seat 200 and the charging terminal 300, further improving the sealing effect.

[0097] Alternatively, the stop portion 324 may be annular to increase the contact area between the stop portion 324 and the terminal fixing seat 200, thereby ensuring the stop positioning effect and sealing effect.

[0098] A sealing structure is provided between the terminal holder 200 and the cable 500 to ensure the sealing of the connection between them. 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 fitted onto the cable 500. The waterproof ring is sandwiched between the end face of the terminal holder 200, the inner wall of the sealing plug, and the outer wall of the cable 500, providing a waterproof seal. One end of the sealing plug is in close contact with the outer wall of the cable 500 along its axial direction, the other end is in close contact with the outer wall of the terminal holder 200, and the middle part is in close contact with the outer wall of the waterproof ring, achieving a connection and seal between the terminal holder 200 and the cable 500, resulting in a good sealing effect.

[0099] One end of the terminal holder 200 along its axis is connected to the connection end 320 of the charging terminal 300, and the other end is connected to the cable 500. This necessitates that the cooling inlet 210 of the terminal holder 200 be located on one side of the terminal holder 200. In this embodiment, to facilitate the connection of the cooling inlet 210 to the pipeline, for example, as shown... Figure 12 and Figure 14As shown, the terminal fixing seat 200 comprises 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 communicating with the cooling cavity 600. The connecting flow channel 251 communicates with the cooling inlet 210, so that the cooling medium enters the cooling cavity 600 through the connecting flow channel 251. One end of the cavity body 240 is sealingly sleeved to the connecting end 320, and the other end of the cavity body 240 is sealingly sleeved to the cable 500. The cavity body 240, the charging terminal 300 and the cable 500 cooperatively form the cooling cavity 600. By arranging the adapter structure 250 and the connecting flow channel 251 in the adapter structure 250, the arrangement position of the cooling inlet 210 is flexible, so as to facilitate the connection of the pipeline and reduce the assembly difficulty.

[0100] It should be noted that the adapter structure 250 and the cavity body 240 in the embodiment are integrated structures, so as to have higher structural strength.

[0101] Further optionally, as shown in Figure 11 The connecting flow channel 251 comprises a first segment 2511 and a second segment 2512 arranged at an angle. The second segment 2512 can be coaxially arranged with the cooling inlet 210. The flow channel opening of the first segment 2511 away from the second segment 2512 communicates with the cooling cavity 600. In this way, the extension direction of the second segment 2512 can be the axial direction of the cavity body 240, so that the extension direction of the pipeline connected to the cooling inlet 210 is substantially the same as the extension direction of the cable 500, so as to reduce the space required by the charging gun of the application terminal assembly in the radial direction, and improve the miniaturization of the charging gun.

[0102] In some optional embodiments, as shown in Figure 11 or Figure 12 The terminal fixing seat 200 further comprises a sealing joint 260. The sealing joint 260 is sealingly arranged at the flow channel opening of the connecting flow channel 251 away from the cooling cavity 600. The cooling inlet 210 is arranged at the sealing joint 260 and communicates with the connecting flow channel 251. By arranging the sealing joint 260, the connection and communication of the terminal fixing seat 200 and the pipeline can be facilitated. The axial direction of the sealing joint 260 in the embodiment is the same as the axial direction of the second segment 2512. For example, the sealing structure and the second segment 2512 can be coaxially arranged.

[0103] Exemplarily, the surface of the adapter structure 250 facing away from the cavity body 240 is provided with a sealing hole 252, which is in communication with the second section 2512. The terminal fixing seat 200 further comprises a sealing screw 270 sealingly screwed into the sealing hole 252. When it is needed to release the cooling medium in the cooling cavity 600, the sealing screw 270 is unscrewed from the sealing hole 252, at which 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, achieving the emptying of the terminal fixing seat 200.

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

[0105] The charging gun provided by the embodiment has the center of the cable 500 provided with a cylindrical support structure 700, so as to ensure the smoothness of the flow of the cooling medium in the cable 500. By providing the terminal fixing seat 200 made of metal, the voltage resistance performance 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 cooling effect of the cooling medium on the conductive portion 520 and the connecting portion 322, reduces the risk of excessively high temperature at the connecting position of the conductive portion 520 and the connecting portion 322, improves the maximum overcurrent that the terminal assembly can withstand, and further improves the charging efficiency of the charging gun using the terminal assembly.

[0106] Exemplarily, Figure 15 and Figure 16 The charging gun provided by the embodiment comprises a head structure 1 and a tail structure 2. The cable 500 of the head structure 1 is electrically connected with the cable 500 of the tail structure 2, and the cooling channels 510 of the two connected cables 500 are in communication to form a cooling loop.

[0107] For example, as Figure 15 shown, the head structure 1 comprises 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 can be provided with a temperature monitoring assembly 400 and a gun body 100, or can not be provided with the temperature monitoring assembly 400 and the gun body 100, which is not limited in the embodiment.

[0108] In one embodiment, the charging gun further comprises a collecting cavity 4, which is arranged 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 in communication with 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 loop.

[0109] Exemplarily, two main pipelines 31 are connected to two ends of the confluence cavity respectively, and the cooling inlet 210 of the two terminal fixing seats 200 of the head structure 1 is connected with one of the main pipelines 31 through a three-way pipe 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 with the other main pipeline 31 through a three-way pipe 5 and two branch pipelines 32.

[0110] It should be noted that the above are only preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A charging gun, characterized in that, include: Gun body (100); Terminal fixing seat (200) is disposed inside the gun body (100), and the outer peripheral wall of the terminal fixing seat (200) and the gun body (100) cooperate to form a temperature detection hole (10); A charging terminal (300), one end of which is disposed on the terminal fixing base (200); The temperature monitoring assembly (400) includes a temperature monitoring device (410) and a heat-conducting component (420) sleeved outside the temperature monitoring device (410). The heat-conducting component (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 component (420) includes a connected heat-conducting structure and an elastic deformable body (422). The heat-conducting structure is connected to the temperature monitoring device (410). The elastic deformable 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 deformable body (422) includes a plurality of elastic strips (4221), each of the elastic strips (4221) protruding in a direction opposite to the temperature monitoring device (410); or, The elastic deformable body (422) is an integral structure.

4. The charging gun according to claim 2, characterized in that, The heat-conducting structure is a ring (421) sleeved on the temperature monitoring device (410), and two heat-conducting structures are arranged opposite each other, with the elastic deformable body (422) connecting the two heat-conducting structures; and / or, The heat-conducting structure is a ring (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), which abuts against the end face of one end of the temperature monitoring device (410).

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

6. The charging gun according to any one of claims 1-3, characterized in that, The terminal holder (200) is tubular, and a cooling inlet (210) is provided on the side wall of the terminal holder (200). The charging gun also includes a cable (500). The charging terminal (300) is inserted into one end of the terminal holder (200), and the cable (500) is inserted into the other end of the terminal holder (200). The charging terminal (300), the cable (500), and the terminal holder (200) cooperate with each other to form a cooling cavity (600) communicating with the cooling inlet (210). A cooling medium is provided in the cooling cavity (600).

7. The charging gun according to claim 6, characterized in that, The heat-conducting element (420) and the charging terminal (300) are arranged opposite 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), and the cooling channel (510) has a channel opening (511) on the surface of the cable (500). The channel opening (511) is located in the portion of the cable (500) located inside the terminal fixing seat (200) and is connected to the cooling cavity (600).

9. The charging gun according to claim 8, characterized in that, The charging gun also includes a support structure (700), which is located in the cooling channel (510) and has a support through hole (710) communicating with the cooling channel (510). The support 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 assembly (800), which is sleeved on the charging terminal (300) and 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-conducting element (420) and the terminal fixing seat (200) is the first contact position, and the contact position between the sealing assembly (800) and the terminal fixing seat (200) is the second contact position. The first contact position and the second contact position are offset from each other in the axial direction of the terminal fixing seat (200).

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