Charging gun and charging device

Abstract

The embodiment of the application provides a charging gun and a charging device, and relates to the technical field of charging devices. The charging gun comprises a wire rack, a power terminal, a liquid cooling plate and an insulating heat-conducting pad. The power terminal extends along a first direction, and the power terminal comprises a first section, and the surface of the first section is covered by the insulating heat-conducting pad. The wire rack has a power terminal groove on one side in a second direction, and the first section and the insulating heat-conducting pad are both arranged in the power terminal groove. The liquid cooling plate is arranged at the opening of the power terminal groove in the second direction, and the liquid cooling plate is fixedly connected with the wire rack. The liquid cooling plate crimps the insulating heat-conducting pad and the first section on the wire rack, and the surface of the first section on both sides in the second direction is pressed together with the insulating heat-conducting pad. The insulating heat-conducting pad separates the power terminal from the liquid cooling plate. In this way, the assembly of the power terminal of the charging gun and the liquid cooling plate is more convenient, and the heat dissipation and insulation effect is better.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of charging equipment, in particular to a charging gun and a charging equipment. BACKGROUND

[0002] The charging gun is a connecting device for transmitting electric energy from a charging pile to an electric vehicle. After the charging gun is connected to the electric vehicle, the charging pile can charge the electric vehicle through the charging gun. With the rapid development of the electric vehicle industry, the battery capacity of the electric vehicle is becoming larger and larger. Increasing the charging power to shorten the charging time is a method to achieve fast charging. Increasing the charging power increases the heat consumption of the charging gun. However, the high temperature of the charging gun will affect the reliability and other performances of the charging gun. Therefore, the heat dissipation efficiency of the charging gun restricts the increase of the charging power.

[0003] Liquid cooling of the charging gun is a direction to improve the heat dissipation efficiency of the charging gun. In the related art, the charging gun can include a power terminal and a liquid cooling plate. The power terminal and the liquid cooling plate are often fixed by injection molding. The charging gun in the related art is inconvenient to assemble and has poor heat dissipation and insulation effect. SUMMARY

[0004] Embodiments of the present application provide a charging gun and a charging equipment, which can make the assembly of the power terminal and the liquid cooling plate of the charging gun more convenient and have better heat dissipation and insulation effect.

[0005] The first aspect of embodiments of the present application provides a charging gun, which includes a wire holder, a power terminal, a liquid cooling plate and an insulating heat-conductive pad. The power terminal extends along a first direction. The power terminal includes a first section, and a surface of the first section is covered by the insulating heat-conductive pad. The wire holder has a power terminal slot on one side in a second direction. The first section and the insulating heat-conductive pad are both arranged in the power terminal slot. The liquid cooling plate is arranged at an opening of the power terminal slot in the second direction. The liquid cooling plate is fixedly connected to the wire holder. The liquid cooling plate press-bonds the insulating heat-conductive pad and the first section on the wire holder. The surfaces of the first section on both sides in the second direction are both press-bonded with the insulating heat-conductive pad. The insulating heat-conductive pad separates the power terminal from the liquid cooling plate.

[0006] The charging gun provided by the embodiments of the present application is assembled and fixed by the wire holder, the assembly process steps are reduced, and the power terminal and the liquid cooling plate are assembled conveniently. In addition, the surface of the first section is covered by the insulating heat-conducting pad, the heat exchange surface between the power terminal and the insulating heat-conducting pad is large, the heat on the power terminal is quickly transmitted to the liquid cooling plate through the insulating heat-conducting pad, and the heat dissipation efficiency of the liquid cooling plate on the power terminal is high. Furthermore, the power terminal and the liquid cooling plate are electrically insulated by the insulating heat-conducting pad located therebetween, and the power terminal and the liquid cooling plate have good insulation performance. The insulating heat-conducting pad and the first section are crimped on the wire holder by the liquid cooling plate, and the surfaces of the first section on both sides in the second direction are pressed against the insulating heat-conducting pad, so that the insulating heat-conducting pad has high adhesion to the liquid cooling plate and the power terminal, thereby improving the heat dissipation efficiency of the liquid cooling plate on the power terminal. The power terminal and the liquid cooling plate are not easy to be miscontacted due to the process such as injection molding, and the insulation failure between the power terminal and the liquid cooling plate is not easy to occur. In addition, the heat conduction path between the liquid cooling plate and the power terminal is short, and the heat dissipation efficiency of the liquid cooling plate on the power terminal is high.

[0007] In some possible implementation manners, the insulating heat-conducting pad is an elastic pad. In this way, the insulating heat-conducting pad is closely attached to the power terminal and the liquid cooling plate, and the heat exchange efficiency between the power terminal and the liquid cooling plate is high.

[0008] In some possible implementation manners, the insulating heat-conducting pad includes a first part, a second part and a third part. The first part and the third part are located on both sides of the second part in the first direction, and the two ends of the second part in the first direction are connected to the first part and the third part, respectively. The liquid cooling plate is crimped on the second part, and the first part and the third part are located on both sides of the liquid cooling plate in the first direction. In this way, the two ends of the insulating heat-conducting pad in the first direction protrude from the liquid cooling plate, and the electrical insulation effect between the power terminal and the liquid cooling plate is good. Further, the power terminal and the liquid cooling plate are not limited to be kept at a certain safety distance by the insulating material.

[0009] In some possible implementation manners, the wire holder includes a first holder body and a second holder body. The second holder body is detachably arranged on one side of the first holder body in the second direction, and the first holder body has a power terminal slot on the side facing the second holder body in the second direction. The liquid cooling plate is fixedly connected to the first holder body, the liquid cooling plate crimps the first section and the insulating heat-conducting pad on the first holder body, and the power terminal is located between the second holder body and the first holder body. In this way, the power terminal and the liquid cooling plate can be assembled on the wire holder conveniently. In addition, the second holder body for assembling other components can be arranged flexibly.

[0010] In some possible implementation manners, the power terminal further includes a second segment and a partition segment, the second segment and the first segment are located on two sides of the partition segment in the first direction respectively, and the second segment is connected to the first segment through the partition segment, and the second segment is used to be connected to the electric vehicle. The partition segment includes a protruding structure protruding from a surface of a side of the first segment facing the liquid cooling plate in the second direction, and the liquid cooling plate is arranged at a side of the protruding structure facing away from the second segment in the first direction. In this way, on the basis of insulating the power terminal from the liquid cooling plate, the protruding structure and the first segment can both exchange heat with the liquid cooling plate through the insulating heat-conducting pad, thereby facilitating improvement of the heat exchange efficiency between the liquid cooling plate and the power terminal.

[0011] In some possible implementation manners, the protruding structure protrudes from a portion of the insulating heat-conducting pad located at the side of the first segment facing the liquid cooling plate in the second direction. In this way, the protruding structure can exchange heat with an end face of an end of the liquid cooling plate facing the second segment, thereby facilitating improvement of the heat exchange efficiency between the power terminal and the liquid cooling plate.

[0012] In some possible implementation manners, an insulating heat-conducting body is arranged between the protruding structure and the liquid cooling plate, one end of the insulating heat-conducting body is connected to the protruding structure in the first direction, and the other end of the insulating heat-conducting body is connected to the liquid cooling plate in the first direction. In this way, heat on the protruding structure can be transmitted to the liquid cooling plate through the insulating heat-conducting body, so that the heat exchange efficiency between the protruding structure and the liquid cooling plate is relatively high.

[0013] In some possible implementation manners, the charging gun further includes a power line and an insulating protective sleeve. The power terminal further includes a third segment and a fourth segment, the first segment and the fourth segment are located on two sides of the third segment in the first direction respectively, and the first segment is connected to the fourth segment through the third segment. The power line includes a terminal connecting end, the terminal connecting end is connected to a surface of a side of the fourth segment facing away from the liquid cooling plate in the second direction, so that the terminal connecting end and the liquid cooling plate are located on two sides of the fourth segment respectively, and the terminal connecting end is convenient and reliable to connect to the power terminal. The insulating protective sleeve covers the fourth segment and the terminal connecting end, so that the fourth segment and the terminal connecting end both have good electrical insulation performance. The insulating protective sleeve is located at a side of the liquid cooling plate facing the fourth segment in the first direction, and an end of the insulating protective sleeve close to the liquid cooling plate is covered by the insulating heat-conducting pad. In this way, the power terminal is not partially exposed due to the interval between the insulating protective sleeve and the insulating heat-conducting pad in the first direction, and the electrical insulation performance of the power terminal is good.

[0014] In some possible implementation manners, the insulating heat-conducting pad extends to a connection position of the fourth segment and the third segment. In this way, the overlapping area of the insulating heat-conducting pad and the insulating protective sleeve is large, and the electrical insulation performance of the power terminal is good. In addition, the deformation of the insulating heat-conducting pad caused by the terminal connecting end extruding the insulating protective sleeve is small, thereby facilitating close contact of the insulating heat-conducting pad with the power terminal and the liquid cooling plate.

[0015] In some possible implementation manners, the distance between the surface of the fourth section away from the side of the liquid cooling plate in the second direction and the liquid cooling plate in the second direction is less than the distance between the surface of the third section away from the side of the liquid cooling plate in the second direction and the liquid cooling plate in the second direction. In this way, the notch formed on the power terminal for accommodating at least part of the terminal connecting end can reduce the extrusion of the terminal connecting end on the insulation protective sleeve, the insulation heat-conductive pad is less deformed due to the extrusion of the terminal connecting end on the insulation protective sleeve, and the insulation heat-conductive pad is beneficial to closely fit with the power terminal and the liquid cooling plate.

[0016] In some possible implementation manners, the outer edge of the one end of the first section connected with the third section is located within the outer edge of the one end of the third section connected with the first section, the end surface of the one end of the first section connected with the third section includes a first area and a second area, the outer edge of the first area is coincident with the outer edge of the one end of the third section connected with the first section, and the second area surrounds the first area in the circumferential direction of the third section, and the second area is used to abut against the one end of the insulation protective sleeve close to the liquid cooling plate. In this way, the interval space can be formed between the peripheral surface of the third section and the peripheral surface of the first section for accommodating at least part of the insulation protective sleeve, and the deformation of the insulation heat-conductive pad caused by the extrusion of the insulation protective sleeve on the insulation heat-conductive pad can be reduced. In addition, the second area can limit the insulation protective sleeve, and the insulation protective sleeve can be prevented from moving to the liquid cooling plate, the part of the insulation heat-conductive pad close to the liquid cooling plate is not easy to be arched due to the extrusion of the insulation protective sleeve, and the insulation heat-conductive pad is beneficial to closely fit with the power terminal and the liquid cooling plate.

[0017] In some possible implementation manners, the power terminal further includes a first end and a second end, the first end and the second end are respectively located at two ends of the power terminal in the first direction, and the first end is used to be connected with the electric vehicle. The second end has an assembly hole, and a temperature sensor is arranged in the assembly hole. The distance between the temperature sensor and the first end is greater than or equal to 12 mm and less than or equal to 65 mm. In this way, the temperature sensor is located at a position where the power terminal generates a large amount of heat, and the working condition of the power terminal can be accurately mastered, so that the power terminal can be found in time when the power terminal is overheated.

[0018] In some possible embodiments, the charging gun further comprises a liquid inlet pipe, a liquid return pipe, and a water immersion rope sensor. The liquid cooling plate has an inlet joint and an outlet joint, the inlet joint being an inlet end of the liquid cooling plate, and the outlet joint being an outlet end of the liquid cooling plate. The inlet joint is connected to the liquid inlet pipe, and the outlet joint is connected to the liquid return pipe. The water immersion rope sensor is in a rope structure, and is arranged at the inlet joint and the outlet joint. The water immersion rope sensor is sleeved outside the liquid inlet pipe, the liquid return pipe, and the insulating heat-conducting pad. In this way, the water immersion rope sensor can be used to detect liquid leakage at multiple positions, such as the connection between the inlet joint and the liquid inlet pipe, and the connection between the outlet joint and the liquid return pipe. The water immersion rope sensor has a large range for detecting liquid leakage, and the number of sensors used for detecting liquid leakage can be reduced, thereby saving installation space.

[0019] In some possible embodiments, the charging gun comprises a plurality of power terminals, a plurality of liquid cooling plates corresponding to the power terminals, and a plurality of insulating heat-conducting pads corresponding to the power terminals. The surface of the first section of the power terminal is covered by the corresponding insulating heat-conducting pad. The wire holder has a plurality of power terminal grooves corresponding to the power terminals, the power terminal and the corresponding insulating heat-conducting pad are arranged in the corresponding power terminal groove, the liquid cooling plate is arranged at the corresponding power terminal, and the power terminal and the corresponding insulating heat-conducting pad are crimped on the wire holder by the corresponding liquid cooling plate. The plurality of liquid cooling plates are arranged in parallel. In this way, the plurality of liquid cooling plates arranged in parallel can reduce temperature cascade, so that the temperature at each power terminal is more balanced, thereby reducing the temperature difference of each power terminal. In addition, the plurality of liquid cooling plates independent of each other can make the assembly of the liquid cooling plate more flexible, and can reduce the requirements for the manufacturing precision and assembly precision of each component of the gun head, and the assembly of the gun head is easier.

[0020] The second aspect of the embodiments of the present application provides a charging device, which comprises a charging pile and the charging gun of any of the above embodiments. The charging pile comprises a power supply assembly and a liquid supply assembly, and the power supply assembly is electrically connected to the power terminal of the charging gun through the power line of the charging gun. The charging gun comprises a liquid inlet pipe and a liquid return pipe, and the liquid outlet end of the liquid supply assembly is connected to the inlet end of the liquid cooling plate of the charging gun through the liquid inlet pipe, and the outlet end of the liquid cooling plate is connected to the liquid return end of the liquid supply assembly through the liquid return pipe. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A schematic diagram of a charging device provided by the embodiments of the present application;

[0022] Figure 2 An exploded view of a charging gun provided by the embodiments of the present application;

[0023] Figure 3 A charging gun provided by the embodiments of the present application; Figure 2A schematic view of a charging gun provided in the present application;

[0024] Figure 4 A schematic view of a wire holder provided in the present application;

[0025] Figure 5 A schematic view of a power terminal provided in the present application;

[0026] Figure 6 A schematic view of a power terminal provided in the present application;

[0027] Figure 7 A schematic view of a gun head provided in the present application;

[0028] Figure 8 An exploded view of a gun head provided in the present application;

[0029] Figure 9 A schematic view of a power terminal provided in the present application; Figure 5 A schematic view of a power terminal provided in the present application;

[0030] Figure 10 A schematic view of a power terminal provided in the present application; Figure 9 A cross-sectional view of A-A provided in the present application;

[0031] Figure 11 An enlarged view of the connection between the first segment and the third segment of a power terminal provided in the present application;

[0032] Figure 12 A schematic view of a gun head provided in the present application; Figure 7 A schematic view of a gun head provided in the present application;

[0033] Explanation of reference signs:

[0034] 1, charging gun; 2, charging pile;

[0035] 10, gun head; 20, cable; 30, power supply assembly; 40, liquid supply assembly;

[0036] 100, gun head seat;

[0037] 200, wire holder; 210, first holder body; 211, power terminal slot; 211a, first power terminal slot; 211b, second power terminal slot; 212, clamping slot; 212a, first clamping slot; 220, second holder body;

[0038] 300, power terminal; 300a, first power terminal; 300b, second power terminal; 310, first section; 311, second region; 320, second section; 321, first end; 330, partition section; 331, protruding structure; 332, clamping edge structure; 340, third section; 350, fourth section; 351, second end; 360, assembly hole; 370, glue injection hole;

[0039] 400, liquid cooling plate; 400a, first liquid cooling plate; 400b, second liquid cooling plate; 410, inlet joint; 410a, first inlet joint; 410b, second inlet joint; 420, outlet joint; 420a, first outlet joint; 420b, second outlet joint; 430, second through hole; 440, third through hole; 450, mounting ear;

[0040] 500, insulating heat-conducting pad; 500a, first insulating heat-conducting pad; 500b, second insulating heat-conducting pad; 510, first part; 520, second part; 530, third part;

[0041] 600, power line; 600a, first power line; 600b, second power line;

[0042] 700, insulating protective sleeve; 700a, first insulating protective sleeve; 700b, second insulating protective sleeve;

[0043] 810, liquid inlet pipe; 810a, first liquid inlet pipe; 810b, second liquid inlet pipe; 820, liquid return pipe; 820a, first liquid return pipe; 820b, second liquid return pipe;

[0044] 900, temperature sensor;

[0045] x, first direction; y, second direction; z, third direction. DETAILED DESCRIPTION

[0046] The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application, and the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0047] Figure 1 A schematic diagram of a charging device provided by the embodiments of the present application.

[0048] As Figure 1As shown in the illustration, this application provides a charging device for charging electric vehicles. The charging device includes a charging pile 2 and a charging gun 1. The charging pile 2 is connected to the charging gun 1. The charging pile 2 provides electrical energy, and the charging gun 1 is a connection device that transmits electrical energy from the charging pile 2 to the electric vehicle. After the charging gun 1 is connected to the electric vehicle, the charging pile 2 can charge the electric vehicle through the charging gun 1. In some examples, this charging device can be a supercharger, whose single charging gun typically has a charging power greater than or equal to 480 kW.

[0049] The charging gun 1 includes a gun head 10 and a cable 20, with the two ends of the cable 20 connected to the gun head 10 and the charging station 2, respectively.

[0050] The charging pile 2 includes a power supply component 30, which can be connected to the mains power supply through the charging host. The charging host can convert the current provided by the mains power supply into the current required for charging electric vehicles.

[0051] Figure 2 This is an exploded view of a charging gun provided in an embodiment of this application. The x-direction is a first direction, the y-direction is a second direction, and the z-direction is a third direction. The first direction is perpendicular to the second direction, the second direction is perpendicular to the third direction, and the second direction is perpendicular to the third direction.

[0052] Understandably, in some implementations, the first direction and the second direction can be set at an angle, the first direction and the third direction can be set at an angle, and the second direction and the third direction can be set at an angle. The first direction and the second direction do not have to be perpendicular.

[0053] like Figure 2 As shown, and see Figure 1 The gun head 10 includes a power terminal 300 extending along a first direction. The cable 20 includes a power line 600, which includes a terminal connection end and a component connection end. The terminal connection end is fixed and electrically connected to the power terminal 300, and the component connection end is fixed and electrically connected to the power supply component 30. The power supply component 30 is electrically connected to the power terminal 300 through the power line 600.

[0054] For example, the power terminal 300 can be electrically connected to the power supply component 30 via one or more power lines 600.

[0055] In some examples, the gun head 10 can include a plurality of power terminals 300 arranged in parallel. For example, the plurality of power terminals 300 can include a first power terminal 300a and a second power terminal 300b, the first power terminal 300a and the second power terminal 300b can be arranged side by side along a third direction, the first power terminal 300a is electrically connected to the power supply assembly 30 through one or more first power lines 600a, and the second power terminal 300b is electrically connected to the power supply assembly 30 through one or more second power lines 600b, wherein the first power line 600a refers to the power line 600 electrically connected to the first power terminal 300a, the second power line 600b refers to the power line 600 electrically connected to the second power terminal 300b, and the first power line 600a and the second power line 600b are different power lines 600.

[0056] In the embodiments of the present application, the gun head 10 further includes a gun head seat 100, the gun head seat 100 is used to be connected to the electric vehicle, and the power terminal 300 is fixedly arranged in the gun head seat 100.

[0057] Figure 3 For Figure 2 the schematic diagram of the charging gun provided in the embodiments of the present application.

[0058] As Figure 3 shown, and referring to Figure 1 , Figure 2 , in order to improve the heat dissipation efficiency of the power terminal 300, the gun head 10 further includes a liquid cooling plate 400, the charging pile 2 further includes a liquid supply assembly 40, and the cable 20 further includes a liquid inlet pipe 810 and a liquid return pipe 820, the liquid outlet end of the liquid supply assembly 40 is connected to the inlet end of the liquid cooling plate 400 through the liquid inlet pipe 810, the outlet end of the liquid cooling plate 400 is connected to the liquid return end of the liquid supply assembly 40 through the liquid return pipe 820, and the liquid cooling plate 400 is used to liquid-cool and dissipate heat for the power terminal 300.

[0059] In some examples in which the gun head 10 includes a plurality of power terminals 300, the gun head 10 can include a plurality of liquid cooling plates 400 corresponding to the power terminals 300, each liquid cooling plate 400 is used to liquid-cool and dissipate heat for the corresponding power terminal 300, and the plurality of liquid cooling plates 400 can be arranged in parallel.

[0060] In this way, compared with the scheme in which a plurality of liquid cooling plates 400 are arranged in series or a plurality of power terminals 300 are liquid-cooled and dissipated by one liquid cooling plate 400, the plurality of liquid cooling plates 400 arranged in parallel can reduce temperature cascade, so that the temperature at each power terminal 300 is relatively balanced, which is beneficial to reducing the temperature difference of each power terminal 300. In addition, the plurality of liquid cooling plates 400 independent of each other can make the assembly of the liquid cooling plate 400 more flexible, and can reduce the requirements for the manufacturing precision and assembly precision of each component of the gun head 10, so that the assembly of the gun head 10 is relatively easy.

[0061] For example, the plurality of liquid cooling plates 400 can include a first liquid cooling plate 400a corresponding to the first power terminal 300a and a second liquid cooling plate 400b corresponding to the second power terminal 300b, the first liquid cooling plate 400a and the second liquid cooling plate 400b are arranged in parallel. The first liquid cooling plate 400a is arranged at the first power terminal 300a, the inlet end of the first liquid cooling plate 400a is connected to the liquid outlet end of the liquid supply assembly 40 through the first liquid inlet pipe 810a, the outlet end of the first liquid cooling plate 400a is connected to the liquid return end of the liquid supply assembly 40 through the first liquid return pipe 820a, and the first liquid cooling plate 400a is used for liquid cooling heat dissipation of the first power terminal 300a. The second liquid cooling plate 400b is arranged at the second power terminal 300b, the inlet end of the second liquid cooling plate 400b is connected to the liquid outlet end of the liquid supply assembly 40 through the second liquid inlet pipe 810b, the outlet end of the second liquid cooling plate 400b is connected to the liquid return end of the liquid supply assembly 40 through the second liquid return pipe 820b, and the second liquid cooling plate 400b is used for liquid cooling heat dissipation of the second power terminal 300b. Wherein, the first liquid inlet pipe 810a refers to the liquid inlet pipe 810 connected to the first liquid cooling plate 400a, the first liquid return pipe 820a refers to the liquid return pipe 820 connected to the first liquid cooling plate 400a, the second liquid inlet pipe 810b refers to the liquid inlet pipe 810 connected to the second liquid cooling plate 400b, and the second liquid return pipe 820b refers to the liquid return pipe 820 connected to the second liquid cooling plate 400b, the first liquid inlet pipe 810a and the second liquid inlet pipe 810b are different liquid inlet pipes 810 arranged in parallel, and the first liquid return pipe 820a and the second liquid return pipe 820b are different liquid return pipes 820 arranged in parallel.

[0062] Figure 4 A schematic diagram of a wire holder according to an embodiment of the present application.

[0063] As shown in Figure 4 and referring to Figure 2 , Figure 3 In the embodiment of the present application, the gun head 10 further includes a wire holder 200, and the wire holder 200 is used for fixed connection with the gun head seat 100. For example, the wire holder 200 can be fixedly connected with the gun head seat 100 by fasteners, welding or the like. For example, the wire holder 200 has a first through hole, the gun head seat 100 has a first threaded hole opposite to the first through hole, and the wire holder 200 and the gun head seat 100 can be fixedly connected by a bolt threaded into the first through hole and the first threaded hole.

[0064] The wire holder 200 has a power terminal groove 211 on one side in the second direction, both ends of the power terminal groove 211 in the first direction are open structures, and the power terminal 300 is arranged in the power terminal groove 211.

[0065] When the gun head 10 includes multiple power terminals 300, the wire holder 200 has multiple power terminal grooves 211 corresponding to the power terminals 300, and the power terminals 300 are arranged in the corresponding power terminal grooves 211. For example, the wire holder 200 can have a first power terminal groove 211a corresponding to the first power terminal 300a and a second power terminal groove 211b corresponding to the second power terminal 300b, the first power terminal 300a is arranged in the first power terminal groove 211a, and the second power terminal 300b is arranged in the second power terminal groove 211b. The first power terminal groove 211a and the second power terminal groove 211b can be arranged side by side along the third direction.

[0066] Figure 5 A schematic diagram of one perspective of a power terminal provided by an embodiment of the present application.

[0067] As shown in Figure 5 , the power terminal 300 can include a first section 310, a second section 320, a third section 340, a fourth section 350, and a partition section 330. The second section 320 and the first section 310 are located on both sides of the partition section 330 in the first direction, respectively. The second section 320 is connected to the first section 310 through the partition section 330, and the second section 320 is used to be connected to an electric vehicle. The first section 310 and the fourth section 350 are located on both sides of the third section 340 in the first direction, respectively. The first section 310 is connected to the fourth section 350 through the third section 340, and the terminal connecting end of the power wire 600 is fixed to and electrically connected to the fourth section 350. For example, the terminal connecting end can be welded to the fourth section 350.

[0068] Figure 6 A schematic diagram of one perspective of a power terminal provided by an embodiment of the present application is covered with an insulating heat-conducting pad and an insulating protective sleeve.

[0069] In the embodiment of the present application, the gun head 10 further includes an insulating heat-conducting pad 500, and the surface of the first section 310 is covered by the insulating heat-conducting pad 500, that is, the surface of the first section 310 is covered by the insulating heat-conducting pad 500, and the insulating heat-conducting pad 500 wraps around the first section 310.

[0070] For example, one end of the insulating heat-conducting pad 500 can extend to the partition section 330, and the other end of the insulating heat-conducting pad 500 can extend to the third section 340 or the fourth section 350.

[0071] Figure 7 A schematic diagram of one perspective of a gun head provided by an embodiment of the present application, Figure 8 An exploded view of a gun head provided by an embodiment of the present application.

[0072] As shown in Figure 7 , Figure 8As shown, in the embodiment of the present application, the first section 310 covered with the insulating heat-conducting pad 500 is arranged in the power terminal groove 211, in other words, the first section 310 and the insulating heat-conducting pad 500 are both arranged in the power terminal groove 211. In some examples, the first section 310 and the insulating heat-conducting pad 500 can be accommodated in the power terminal groove 211 entirely. In other examples, part of the first section 310 and part of the insulating heat-conducting pad 500 can protrude out of the power terminal groove 211, for example, at least one end of the first section 310 and at least one end of the insulating heat-conducting pad 500 in the first direction can protrude out of the power terminal groove 211, for another example, one side of the first section 310 and one side of the insulating heat-conducting pad 500 in the second direction can protrude out of the power terminal groove 211.

[0073] The liquid cooling plate 400 is arranged at the opening of the power terminal groove 211 in the second direction, the liquid cooling plate 400 is fixedly connected with the wire rack 200, the liquid cooling plate 400 crimps the insulating heat-conducting pad 500 and the first section 310 on the wire rack 200, the two side surfaces of the first section 310 in the second direction are both crimped with the insulating heat-conducting pad 500, and the insulating heat-conducting pad 500 separates the power terminal 300 from the liquid cooling plate 400.

[0074] In this way, compared with the scheme that the power terminal 300 and the liquid cooling plate 400 are fixed in the plastic body by embedded injection molding, the power terminal 300 and the liquid cooling plate 400 are fixed by the wire holder 200, and the power terminal 300 and the liquid cooling plate 400 are assembled more conveniently. In addition, compared with the scheme that the heat exchange is realized by the plastic body formed by injection molding between the power terminal 300 and the liquid cooling plate 400, the heat exchange is realized by the insulating heat-conducting pad 500 between the power terminal 300 and the liquid cooling plate 400, the selection of the insulating heat-conducting pad 500 is less limited, and the insulating heat-conducting pad 500 with good heat conductivity and high adhesion to the liquid cooling plate 400 and the power terminal 300 can be selected to improve the heat dissipation efficiency of the liquid cooling plate 400 on the power terminal 300. In addition, the surface of the first section 310 is covered by the insulating heat-conducting pad 500, the heat exchange area between the power terminal 300 and the insulating heat-conducting pad 500 is large, which is beneficial to the rapid heat transfer from the power terminal 300 to the liquid cooling plate 400 through the insulating heat-conducting pad 500, so that the heat dissipation efficiency of the liquid cooling plate 400 on the power terminal 300 is high. Furthermore, compared with the scheme that the electrical insulation is realized by the plastic body formed by injection molding between the power terminal 300 and the liquid cooling plate 400, the power terminal 300 and the liquid cooling plate 400 are separated by the insulating heat-conducting pad 500, and the electrical insulation is realized by the insulating heat-conducting pad 500 between the power terminal 300 and the liquid cooling plate 400. Since the insulating heat-conducting pad 500 is not limited to being formed by injection molding, the selection of the insulating heat-conducting pad 500 is less limited, and the insulating heat-conducting pad 500 with good insulation performance can be selected to make the power terminal 300 and the liquid cooling plate 400 have good insulation performance. Compared with the scheme that the electrical insulation is realized by the plastic body formed by injection molding between the power terminal 300 and the liquid cooling plate 400, the power terminal 300 and the liquid cooling plate 400 are not easy to be miscontacted due to the injection molding process, and the insulation failure problem between the power terminal 300 and the liquid cooling plate 400 is not easy to occur. In addition, the heat conduction path between the liquid cooling plate 400 and the power terminal 300 is short, and the heat dissipation efficiency of the liquid cooling plate 400 on the power terminal 300 is high.

[0075] The liquid cooling plate 400 presses the insulating heat-conducting pad 500 and the first section 310 on the wire holder 200, and the two side surfaces of the first section 310 in the second direction are pressed with the insulating heat-conducting pad 500, so that the two side surfaces of the first section 310 in the second direction and the liquid cooling plate 400 are in close contact with the insulating heat-conducting pad 500, and the first section 310 can exchange heat with the liquid cooling plate 400 more efficiently.

[0076] The insulation heat-conductive pad 500 has high heat-conducting performance. For example, the heat-conducting coefficient of the insulation heat-conductive pad 500 can be in the range of about 5-30 W / m.K, so that the power terminal 300 and the liquid cooling plate 400 can efficiently conduct heat.

[0077] The insulation heat-conductive pad 500 has high insulation performance. For example, the volume resistivity of the insulation heat-conductive pad 500 can be greater than about 108Ω.cm. For example, the insulation strength (breakdown voltage) of the insulation heat-conductive pad 500 can be greater than or equal to about 3kv / mm. In this way, the insulation heat-conductive pad 500 can play a good role in insulating and isolating the power terminal 300 and the liquid cooling plate 400.

[0078] The insulation heat-conductive pad 500 can efficiently transfer heat on the power terminal 300 to the liquid cooling plate 400, and the insulation heat-conductive pad 500 can also electrically insulate the power terminal 300 and the liquid cooling plate 400.

[0079] The two side groove walls of the power terminal groove 211 in the third direction can be used to limit the movement of the power terminal 300 between the two side groove walls in the third direction.

[0080] For example, the two side surfaces of the first section 310 in the third direction can respectively press the insulation heat-conductive pad 500 on the two side groove walls of the power terminal groove 211 in the third direction. The two side surfaces of the first section 310 in the third direction are in contact with the insulation heat-conductive pad 500, so that the two side surfaces of the first section 310 in the third direction are in close contact with the insulation heat-conductive pad 500, and the first section 310 can efficiently exchange heat with the insulation heat-conductive pad 500. In addition, the power terminal 300 can be fixed more stably on the rack 200.

[0081] For example, as shown in Figure 4 , the rack 200 has a clamping groove 212 at a position opposite to the partition section 330. As shown in Figure 5 , the partition section 330 includes a clamping rib structure 332, which protrudes from the surface of the first section 310 on the side away from the liquid cooling plate 400 along the second direction. The clamping rib structure 332 is clamped in the clamping groove 212 to limit the movement of the power terminal 300 in the first direction.

[0082] For example, the clamping rib structure 332 can protrude from the part of the insulation heat-conductive pad 500 on the side of the first section 310 away from the liquid cooling plate 400 along the second direction, so as to facilitate the clamping rib structure 332 and the clamping groove 212.

[0083] In some possible embodiments, the insulation heat-conductive pad 500 can be an elastic pad. That is, the insulation heat-conductive pad 500 can be compressed.

[0084] In this way, the elastic insulation and heat conduction pad 500 is compressed, and the insulation and heat conduction pad 500 is closely attached to the power terminal 300 and the liquid cooling plate 400, so that the heat on the power terminal 300 is efficiently transferred to the liquid cooling plate 400.

[0085] The insulation and heat conduction pad 500 has the flexible compression deformation ability, the high heat conduction performance and the high insulation performance. The insulation and heat conduction pad 500 can be used as a thermal interface material between the power terminal 300 and the liquid cooling plate 400 to quickly conduct heat.

[0086] For example, the compression deformation amount of the insulation and heat conduction pad 500 can be in the range of about 5-60%. In this way, the insulation and heat conduction pad 500 is closely attached to the power terminal 300 and the liquid cooling plate 400.

[0087] For example, the hardness of the insulation and heat conduction pad 500 tested by Shore 00 can be in the range of about 20-80. In this way, the insulation and heat conduction pad 500 is deformed under pressure, so that the insulation and heat conduction pad 500 is closely attached to the power terminal 300 and the liquid cooling plate 400.

[0088] For example, the insulation and heat conduction pad 500 can include an elastomer and an insulation and heat conduction filler, and the insulation and heat conduction filler can be arranged in the elastomer. The insulation and heat conduction filler can be a granular structure filled in the elastomer.

[0089] For example, the insulation and heat conduction filler can include, but is not limited to, aluminum nitride, diamond, etc.

[0090] For example, the compression deformation amount of the elastomer can be in the range of 5-60%. In this way, the compression deformation of the insulation and heat conduction pad 500 is facilitated.

[0091] For example, the hardness of the elastomer tested by Shore 00 can be in the range of 20-80. In this way, the compression deformation of the insulation and heat conduction pad 500 is facilitated.

[0092] For example, the elastomer can be made of one or more of the following materials: silicone, polyurethane, rubber, etc.

[0093] In other possible embodiments, the insulation and heat conduction pad 500 can also be a hard pad. For example, the insulation and heat conduction pad 500 can also be a heat conductive plastic. For another example, the insulation and heat conduction pad 500 can also be a ceramic. When the insulation and heat conduction pad 500 is a hard pad, the insulation and heat conduction pad 500 and the power terminal 300, and the insulation and heat conduction pad 500 and the liquid cooling plate 400 can be connected by a thermal interface material.

[0094] For example, the insulation and heat conduction pad 500 can be a thermal interface material, and the power terminal 300 and the liquid cooling plate 400 can be connected by the insulation and heat conduction pad 500. Figure 6 , Figure 7As shown, in some possible embodiments, the insulating thermal pad 500 includes a first portion 510, a second portion 520, and a third portion 530. The first portion 510 and the third portion 530 are respectively located on both sides of the second portion 520 in a first direction, and the two ends of the second portion 520 in the first direction are respectively connected to the first portion 510 and the third portion 530. The liquid cooling plate 400 is pressed onto the second portion 520, and the first portion 510 and the third portion 530 are respectively located on both sides of the liquid cooling plate 400 in the first direction.

[0095] In this way, both ends of the insulating thermal pad 500 protrude from the liquid cooling plate 400 in the first direction, resulting in better electrical insulation between the power terminal 300 and the liquid cooling plate 400.

[0096] like Figure 8 As shown, in some examples where the nozzle 10 includes multiple power terminals 300, the nozzle 10 includes multiple insulating thermally conductive pads 500 corresponding one-to-one with each power terminal 300. The surface of the first segment 310 of the power terminal 300 is covered by the corresponding insulating thermally conductive pad 500. Both the power terminal 300 and the corresponding insulating thermally conductive pad 500 are inserted into the corresponding power terminal slot 211. A liquid cooling plate 400 is disposed at the corresponding power terminal 300, and the power terminal 300 and the corresponding insulating thermally conductive pad 500 are pressed onto the wire frame 200 by the corresponding liquid cooling plate 400. Both sides of the power terminal 300 in the second direction are pressed against the corresponding insulating thermally conductive pad 500, and the power terminal 300 and the corresponding liquid cooling plate 400 are separated by the corresponding insulating thermally conductive pad 500.

[0097] For example, the gun head 10 comprises a first insulating heat-conducting pad 500a corresponding to the first power terminal 300a and a second insulating heat-conducting pad 500b corresponding to the second power terminal 300b. The surface of the first section 310 of the first power terminal 300a is covered by the first insulating heat-conducting pad 500a, the first section 310 of the first power terminal 300a and the first insulating heat-conducting pad 500a are both arranged in the first power terminal slot 211a, the first liquid cooling plate 400a is arranged at the first power terminal 300a, that is, the first liquid cooling plate 400a is arranged at the opening of the first power terminal slot 211a in the second direction, the first liquid cooling plate 400a crimps the first insulating heat-conducting pad 500a and the first section 310 of the first power terminal 300a on the rack 200, the two side surfaces of the first power terminal 300a in the second direction are both pressed with the first insulating heat-conducting pad 500a, and the first power terminal 300a is separated from the first liquid cooling plate 400a by the first insulating heat-conducting pad 500a. The surface of the first section 310 of the second power terminal 300b is covered by the second insulating heat-conducting pad 500b, the first section 310 of the second power terminal 300b and the second insulating heat-conducting pad 500b are both arranged in the second power terminal slot 211b, the second liquid cooling plate 400b is arranged at the second power terminal 300b, that is, the second liquid cooling plate 400b is arranged at the opening of the second power terminal slot 211b in the second direction, the second liquid cooling plate 400b crimps the second insulating heat-conducting pad 500b and the first section 310 of the second power terminal 300b on the rack 200, the two side surfaces of the second power terminal 300b in the second direction are both pressed with the second insulating heat-conducting pad 500b, and the second power terminal 300b is separated from the second liquid cooling plate 400b by the second insulating heat-conducting pad 500b.

[0098] For example, the rack 200 has a first clamping slot 212a corresponding to the baffle section 330 of the first power terminal 300a and a second clamping slot (not shown) corresponding to the baffle section 330 of the second power terminal 300b, the clamping rib structure 332 of the first power terminal 300a is clamped in the first clamping slot 212a to limit the movement of the first power terminal 300a in the first direction, and the clamping rib structure 332 of the second power terminal 300b is clamped in the second clamping slot to limit the movement of the second power terminal 300b in the first direction.

[0099] For example, the liquid cooling plate 400 has an inlet joint 410 and an outlet joint 420 away from one end of the second section 320 in the first direction, the inlet joint 410 is the inlet end of the liquid cooling plate 400, the outlet joint 420 is the outlet end of the liquid cooling plate 400, the inlet joint 410 is connected with the liquid inlet pipe 810, and the outlet joint 420 is connected with the liquid return pipe 820.

[0100] When the gun head 10 comprises the first liquid cooling plate 400a and the second liquid cooling plate 400b, the first liquid cooling plate 400a has a first inlet joint 410a and a first outlet joint 420a away from one end of the second section 320 in the first direction, the first inlet joint 410a is connected with the first liquid inlet pipe 810a, and the first outlet joint 420a is connected with the first liquid return pipe 820a. The second liquid cooling plate 400b has a second inlet joint 410b and a second outlet joint 420b away from one end of the second section 320 in the first direction, the second inlet joint 410b is connected with the second liquid inlet pipe 810b, and the second outlet joint 420b is connected with the second liquid return pipe 820b. Among them, the first inlet joint 410a is the inlet joint 410 of the first liquid cooling plate 400a, the first outlet joint 420a is the outlet joint 420 of the first liquid cooling plate 400a, the second inlet joint 410b is the inlet joint 410 of the second liquid cooling plate 400b, and the second outlet joint 420b is the outlet joint 420 of the second liquid cooling plate 400b.

[0101] In some possible embodiments, the wire rack 200 comprises a first rack body 210 and a second rack body 220. The second rack body 220 is detachably arranged on one side of the first rack body 210 in the second direction, and the first rack body 210 has a power terminal groove 211 on the side facing the second rack body 220 in the second direction. The liquid cooling plate 400 is fixedly connected with the first rack body 210, and the liquid cooling plate 400 is crimped on the first rack body 210 with the first section 310 and the insulating heat-conducting pad 500, and the power terminal 300 is located between the second rack body 220 and the first rack body 210.

[0102] In this way, when the power terminal 300 and the liquid cooling plate 400 are assembled, the second rack body 220 can be detached from the first rack body 210 to avoid blocking the assembly of the power terminal 300 and the liquid cooling plate 400. After the power terminal 300 and the liquid cooling plate 400 are assembled on the first rack body 210, the second rack body 220 is assembled on the first rack body 210, so that the power terminal 300 and the liquid cooling plate 400 are more convenient to assemble on the wire rack 200. In addition, the position of the second rack body 220 for assembling other components can be more flexible.

[0103] In some examples, the first rack body 210 and the second rack body 220 can be clamped.

[0104] In other examples, the first rack body 210 and the second rack body 220 can be connected by threaded fasteners.

[0105] For example, the second rack body 220 can be used to fix one or more of the signal terminal, the ground terminal, etc.

[0106] In other possible embodiments, the wire rack 200 can also be a one-piece structure.

[0107] In some possible embodiments, as shown in Figure 5 The baffle segment 330 includes a protruding structure 331 protruding from the surface of the side of the first segment 310 facing the liquid cooling plate 400 along the second direction, which can exchange heat with the end face of the end of the insulating thermal pad 500 facing the protruding structure 331. For example, the insulating thermal pad 500 can extend to and contact the end face of the end of the protruding structure 331 facing the liquid cooling plate 400 along the first direction, so that the insulating thermal pad 500 can exchange heat with the protruding structure 331 by contact. In this way, both the first segment 310 and the protruding structure 331 can exchange heat with the insulating thermal pad 500, so that the power terminal 300 has a larger heat exchange surface with the insulating thermal pad 500, which is conducive to improving the heat exchange efficiency between the power terminal 300 and the liquid cooling plate 400.

[0108] As shown in Figure 7 The liquid cooling plate 400 is arranged at a position away from the side of the protruding structure 331 facing away from the second segment 320 along the first direction. In this way, the electrical insulation between the liquid cooling plate 400 and the power terminal 300 is facilitated.

[0109] The portion of the first segment 310 between the baffle segment 330 and the liquid cooling plate 400 along the first direction is covered by the first portion 510.

[0110] For example, as shown in Figure 6 The protruding structure 331 can protrude from the portion of the insulating thermal pad 500 on the side of the first segment 310 facing the liquid cooling plate 400 along the second direction, and the protruding structure 331 can exchange heat with the end face of the end of the liquid cooling plate 400 facing the second segment 320. In this way, the heat exchange efficiency between the power terminal 300 and the liquid cooling plate 400 is improved.

[0111] The projection of the protruding structure 331 along the first direction partially overlaps the projection of the liquid cooling plate 400 along the first direction.

[0112] When the gun head 10 includes the first power terminal 300a, the second power terminal 300b, the first liquid cooling plate 400a, and the second liquid cooling plate 400b, the projection of the protruding structure 331 of the first power terminal 300a along the first direction partially overlaps the projection of the first liquid cooling plate 400a along the first direction, and the projection of the protruding structure 331 of the second power terminal 300b along the first direction partially overlaps the projection of the second liquid cooling plate 400b along the first direction.

[0113] In some examples, the protruding structure 331 and the end face of the end of the liquid cooling plate 400 facing the second segment 320 can exchange heat through a gap therebetween.

[0114] In some examples, an insulating heat conductor (not shown) can be arranged between the protruding structure 331 and the liquid cooling plate 400, one end of the insulating heat conductor in the first direction is connected with the protruding structure 331, and the other end of the insulating heat conductor in the first direction is connected with the liquid cooling plate 400. Heat on the protruding structure 331 can be transferred to the liquid cooling plate 400 through the insulating heat conductor, so as to improve the heat exchange efficiency between the protruding structure 331 and the liquid cooling plate 400.

[0115] In some possible embodiments, the terminal connecting end is connected with a surface of the fourth section 350 on a side of the fourth section 350 away from the liquid cooling plate 400 in the second direction.

[0116] In this way, the terminal connecting end and the liquid cooling plate 400 are respectively located on two sides of the fourth section 350, and the connection between the terminal connecting end and the fourth section 350 is not easily affected by the liquid inlet pipe 810 and the liquid return pipe 820, so that the connection between the terminal connecting end and the fourth section 350 is convenient and reliable.

[0117] In some possible embodiments, the gun head 10 further comprises an insulating protective sleeve 700, and the insulating protective sleeve 700 covers the fourth section 350 and the terminal connecting end.

[0118] In this way, electrical insulation at the fourth section 350 and the terminal connecting end is facilitated.

[0119] When the gun head 10 comprises the first power terminal 300a and the second power terminal 300b, the gun head 10 comprises a first insulating protective sleeve 700a corresponding to the first power terminal 300a and a second insulating protective sleeve 700b corresponding to the second power terminal 300b. The first insulating protective sleeve 700a covers the fourth section 350 of the first power terminal 300a and the terminal connecting end connected with the first power terminal 300a, and the second insulating protective sleeve 700b covers the fourth section 350 of the second power terminal 300b and the terminal connecting end connected with the second power terminal 300b.

[0120] Figure 9 For Figure 5 a perspective view of another view of the power terminal provided in the Figure 10 a cross-sectional view of the A-A plane in Figure 9 .

[0121] As Figure 9 , Figure 10 shown, in some examples, the insulating protective sleeve 700 is located on a side of the liquid cooling plate 400 facing the fourth section 350 in the first direction, and an end of the insulating protective sleeve 700 close to the liquid cooling plate 400 is covered by the insulating heat-conducting pad 500.

[0122] In this way, the power terminal 300 is not partially exposed due to the gap between the insulation protective sleeve 700 and the insulation heat-conducting pad 500 in the first direction, and the electrical insulation performance of the power terminal 300 is better.

[0123] The end of the insulation protective sleeve 700 close to the liquid cooling plate 400 is covered by the third section 530.

[0124] The insulation protective sleeve 700 is located on one side of the first section 310 facing the fourth section 350 in the first direction.

[0125] For example, the end of the insulation heat-conducting pad 500 away from the second section 320 can extend to the connection between the fourth section 350 and the third section 340, so that the overlapping area of the insulation heat-conducting pad 500 and the insulation protective sleeve 700 is larger, and the electrical insulation performance of the power terminal 300 is better. In addition, when the size of the terminal connecting end in the second direction is large, the deformation of the insulation heat-conducting pad 500 caused by the extrusion of the insulation protective sleeve 700 by the terminal connecting end is small, which is conducive to the close fit of the insulation heat-conducting pad 500 with the power terminal 300 and the liquid cooling plate 400.

[0126] In some possible embodiments, the distance between the surface of the fourth section 350 away from the liquid cooling plate 400 in the second direction and the liquid cooling plate 400 in the second direction is smaller than the distance between the surface of the third section 340 away from the liquid cooling plate 400 in the second direction and the liquid cooling plate 400 in the second direction.

[0127] In this way, a gap for accommodating at least part of the terminal connecting end can be formed on the side of the power terminal 300 away from the liquid cooling plate 400, and the extrusion of the insulation protective sleeve 700 by the terminal connecting end can be reduced, and the deformation of the insulation heat-conducting pad 500 caused by the extrusion of the insulation protective sleeve 700 by the terminal connecting end is small, which is conducive to the close fit of the insulation heat-conducting pad 500 with the power terminal 300 and the liquid cooling plate 400.

[0128] The distance between the surface of the fourth section 350 away from the liquid cooling plate 400 in the second direction and the liquid cooling plate 400 in the second direction and the distance between the surface of the third section 340 away from the liquid cooling plate 400 in the second direction and the liquid cooling plate 400 in the second direction are distances obtained with reference to the same plane perpendicular to the second direction on the liquid cooling plate 400. For example, the distance between the surface of the fourth section 350 away from the liquid cooling plate 400 in the second direction and the liquid cooling plate 400 in the second direction can be the distance between the surface of the fourth section 350 away from the liquid cooling plate 400 in the second direction and the plane of the liquid cooling plate 400 pressing the insulation heat-conducting pad 500, and the distance between the surface of the third section 340 away from the liquid cooling plate 400 in the second direction and the liquid cooling plate 400 in the second direction is the distance between the surface of the third section 340 away from the liquid cooling plate 400 in the second direction and the plane of the liquid cooling plate 400 pressing the insulation heat-conducting pad 500.

[0129] Figure 11 An enlarged view of the connection between the first section and the third section of the power terminal according to an embodiment of the present application.

[0130] As shown in Figure 11 some possible embodiments, the outer edge of the end of the third section 340 connecting the first section 310 is located within the outer edge of the end of the first section 310 connecting the third section 340, the end surface of the end of the first section 310 connecting the third section 340 comprises a first area (not shown) and a second area 311, the outer edge of the first area coincides with the outer edge of the end of the third section 340 connecting the first section 310, and the second area 311 surrounds the first area in the circumferential direction of the third section 340, the second area 311 is used to abut against the end of the insulation protective sleeve 700 close to the liquid cooling plate 400.

[0131] In this way, a spacing space can be formed between the circumferential surface of the third section and the circumferential surface of the first section for accommodating at least part of the insulation protective sleeve 700, and the deformation of the insulation thermal pad 500 caused by the extrusion of the insulation protective sleeve 700 can be reduced. In addition, the second area 311 can limit the movement of the insulation protective sleeve 700, and the second part 520 of the insulation thermal pad 500 connected to the liquid cooling plate 400 is less likely to be arched due to the extrusion of the insulation protective sleeve 700, which facilitates the close contact between the second part 520 and the power terminal 300 and the liquid cooling plate 400.

[0132] As shown in Figure 10 some possible embodiments, the power terminal 300 further comprises a first end 321 and a second end 351, the first end 321 and the second end 351 are respectively located at two ends of the power terminal 300 in the first direction, and the first end 321 is used to be connected to an electric vehicle. The second end 351 has an assembly hole 360, and a temperature sensor 900 is arranged in the assembly hole 360, so that the temperature of the power terminal 300 can be obtained through the temperature sensor 900, and the temperature sensor 900 is convenient to install.

[0133] The second section 320 comprises a first end 321, and the first end 321 is located at one end of the second section 320 away from the partition section 330. The fourth section 350 comprises a second end 351, and the second end 351 is located at one end of the fourth section 350 away from the third section 340.

[0134] In some examples, the distance between the temperature sensor 900 and the first end 321 is L, and L is greater than or equal to 12 mm and less than or equal to 65 mm.

[0135] In this way, the temperature sensor 900 is located at a position where the power terminal 300 generates a large amount of heat, so that the working condition of the power terminal 300 can be accurately grasped, and overheating of the power terminal 300 can be found in time.

[0136] For example, the surface of the power terminal 300 further has a glue injection hole 370 in communication with the assembly hole 360, the glue injection hole 370 is arranged close to the hole bottom of the assembly hole 360, and the glue injection hole 370 is used for injecting glue into the assembly hole 360 to bond the temperature sensor 900 and the power terminal 300.

[0137] For example, the glue injection hole 370 is located on the surface of the side of the power terminal 300 away from the liquid cooling plate 400 along the second direction.

[0138] In some possible implementation manners, the charging gun 1 further includes a water immersion rope sensor (not shown), the water immersion rope sensor is in a rope structure, the water immersion rope sensor is arranged at the inlet joint 410 and the outlet joint 420, liquid leakage detection can be performed through the water immersion rope sensor, the water immersion rope sensor is sleeved outside the liquid inlet pipe 810, the liquid return pipe 820 and the insulating heat-conducting pad 500, that is, the liquid inlet pipe 810, the liquid return pipe 820 and the insulating heat-conducting pad 500 are sleeved in the space formed by the water immersion rope sensor, in this way, liquid leakage detection can be performed on multiple positions such as the connection position between the inlet joint 410 and the liquid inlet pipe 810 and the connection position between the outlet joint 420 and the liquid return pipe 820 through one water immersion rope sensor, the range of liquid leakage detection performed by the water immersion rope sensor is large, the number of sensors used for liquid leakage detection can be reduced, and then installation space can be saved. In addition, the water immersion rope sensor is sleeved outside the liquid inlet pipe 810, the liquid return pipe 820 and the insulating heat-conducting pad 500, so that the water immersion rope sensor can be conveniently installed.

[0139] For example, the water immersion rope sensor is sleeved outside the third part 530.

[0140] When the gun head 10 includes multiple power terminals 300, the water immersion rope sensor is arranged at all inlet joints 410 and all outlet joints 420, and is sleeved outside all liquid inlet pipes 810, all liquid return pipes 820 and all insulating heat-conducting pads 500, that is, all liquid inlet pipes 810, all liquid return pipes 820 and all insulating heat-conducting pads 500 are sleeved in the space formed by the water immersion rope sensor. The water immersion rope sensor can detect liquid leakage at the connection between all inlet joints 410 and liquid inlet pipes 810, and at the connection between all outlet joints 420 and liquid return pipes 820. For example, when the gun head 10 includes a first power terminal 300a, a second power terminal 300b, a first liquid cooling plate 400a, a second liquid cooling plate 400b, a first insulating heat-conducting pad 500a and a second insulating heat-conducting pad 500b, the water immersion rope sensor is arranged at the first inlet joint 410a, the second inlet joint 410b, the first outlet joint 420a and the second outlet joint 420b, and is sleeved outside the first liquid inlet pipe 810a, the second liquid inlet pipe 810b, the first liquid return pipe 820a, the second liquid return pipe 820b, the first insulating heat-conducting pad 500a and the second insulating heat-conducting pad 500b.

[0141] Figure 12 For Figure 7 another perspective view of the gun head provided in the present disclosure.

[0142] As Figure 12 shown in some possible embodiments, the liquid cooling plate 400 can be fixedly connected with the wire rack 200 by fasteners. For example, the liquid cooling plate 400 can be fixedly connected with the wire rack 200 by bolts.

[0143] For example, the liquid cooling plate 400 has a second through hole 430 and a third through hole 440, the second through hole 430 and the third through hole 440 are respectively located on two sides of the liquid cooling plate 400 in the third direction, the second through hole 430 and the third through hole 440 both penetrate the liquid cooling plate 400 along the second direction, the wire rack 200 has a second threaded hole opposite to the second through hole 430 and a third threaded hole opposite to the third through hole 440, and the liquid cooling plate 400 is fixedly connected with the wire rack 200 by a bolt threaded into the second through hole 430 and the second threaded hole and screwed with the hole wall of the second threaded hole, and a bolt threaded into the third through hole 440 and the third threaded hole and screwed with the hole wall of the third threaded hole.

[0144] When the gun head 10 comprises the first liquid cooling plate 400a and the second liquid cooling plate 400b arranged side by side in the third direction, the second through hole 430 of the first liquid cooling plate 400a is located on the side of the first liquid cooling plate 400a away from the second liquid cooling plate 400b, and the second through holes 430 of the first liquid cooling plate 400a are arranged in an array along the first direction. The second through hole 430 of the second liquid cooling plate 400b is located on the side of the second liquid cooling plate 400b away from the first liquid cooling plate 400a, and the second through holes 430 of the second liquid cooling plate 400b are arranged in an array along the first direction. The side of the first liquid cooling plate 400a close to the second liquid cooling plate 400b has a mounting lug 450, and the side of the second liquid cooling plate 400b close to the first liquid cooling plate 400a has a mounting lug 450, the mounting lug 450 of the first liquid cooling plate 400a is arranged in a staggered manner with the mounting lug 450 of the second liquid cooling plate 400b, the third through hole 440 of the first liquid cooling plate 400a is located on the mounting lug 450 of the first liquid cooling plate 400a, and the third through hole 440 of the second liquid cooling plate 400b is located on the mounting lug 450 of the second liquid cooling plate 400b. The third through hole 440 of the first liquid cooling plate 400a and the third through hole 440 of the second liquid cooling plate 400b are arranged in an array along the first direction.

[0145] In this way, the space utilization rate of the wire rack 200 is high, and the size of the gun head 10 can be small.

[0146] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0147] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the embodiments of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.

[0148] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and not to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A charging gun, characterized in that, The line frame, the power terminal, the liquid cooling plate and the insulating heat-conducting pad are included; The power terminal extends along a first direction, and the power terminal includes a first section, a surface of the first section being wrapped by the insulating heat-conducting pad; The line frame has a power terminal slot on one side in a second direction, the first section and the insulating heat-conducting pad are arranged in the power terminal slot, the liquid cooling plate is arranged at an opening of the power terminal slot in the second direction, the liquid cooling plate is fixedly connected with the line frame, the liquid cooling plate press-bonds the insulating heat-conducting pad and the first section on the line frame, so that the insulating heat-conducting pad is tightly attached to the first section and the liquid cooling plate, the surfaces of the first section on both sides in the second direction are press-bonded with the insulating heat-conducting pad, and the insulating heat-conducting pad separates the power terminal from the liquid cooling plate; The second direction is a height direction of the charging gun. The first section and the insulating heat-conducting pad are arranged in the power terminal slot.

2. The charging gun of claim 1, wherein, The insulating heat-conducting pad is an elastic pad.

3. The charging gun of claim 1, wherein, The insulating heat-conducting pad includes a first part, a second part and a third part. The first part and the third part are respectively located on both sides of the second part in the first direction, and the second part is connected with the first part and the third part at both ends in the first direction. The liquid cooling plate is press-bonded on the second part, and the first part and the third part are respectively located on both sides of the liquid cooling plate in the first direction.

4. The charging gun of claim 2, wherein, The insulating heat-conducting pad includes a first part, a second part and a third part. The first part and the third part are respectively located on both sides of the second part in the first direction, and the second part is connected with the first part and the third part at both ends in the first direction. The liquid cooling plate is press-bonded on the second part, and the first part and the third part are respectively located on both sides of the liquid cooling plate in the first direction.

5. The charging gun according to any one of claims 1-4, characterized in that, The line frame includes a first frame body and a second frame body. The second frame body is detachably arranged on one side of the first frame body in the second direction, and the first frame body has the power terminal slot on the side facing the second frame body in the second direction. The liquid cooling plate is fixedly connected with the first frame body, the liquid cooling plate press-bonds the first section and the insulating heat-conducting pad on the first frame body, and the power terminal is located between the second frame body and the first frame body.

6. The charging gun according to any one of claims 1-4, characterized in that, The power terminal further includes a second section and a partition section, the second section and the first section are respectively located on both sides of the partition section in the first direction, the second section is connected with the first section through the partition section, and the second section is used for being connected with an electric vehicle; The partition section includes a protruding structure, the protruding structure protrudes from a surface of the side of the first section facing the liquid cooling plate in the second direction, and the liquid cooling plate is arranged at a side of the protruding structure facing away from the second section in the first direction.

7. The charging gun according to any one of claims 1-4, characterized in that, The power line and the insulating protective sleeve are further included. The power terminal further comprises a third section and a fourth section, the first section and the fourth section are respectively located on two sides of the third section in the first direction, and the first section is connected with the fourth section through the third section; The power line comprises a terminal connecting end, the terminal connecting end is connected with a surface on a side of the fourth section away from the liquid cooling plate in the second direction, the insulating protective sleeve covers the fourth section and the terminal connecting end, the insulating protective sleeve is located on a side of the liquid cooling plate facing the fourth section in the first direction, and an end of the insulating protective sleeve close to the liquid cooling plate is covered by the insulating heat-conductive pad.

8. The charging gun of claim 7, wherein, The distance between the surface on a side of the fourth section away from the liquid cooling plate in the second direction and the liquid cooling plate in the second direction is less than the distance between the surface on a side of the third section away from the liquid cooling plate in the second direction and the liquid cooling plate in the second direction; And / or, The outer edge of the end of the first section connected with the third section is located within the outer edge of the end of the third section connected with the first section, the end surface of the end of the first section connected with the third section comprises a first area and a second area, the outer edge of the first area coincides with the outer edge of the end of the third section connected with the first section, the second area surrounds the first area in the circumferential direction of the third section, and the second area is used for abutting against the end of the insulating protective sleeve close to the liquid cooling plate.

9. The charging gun according to any one of claims 1-4, characterized in that, The power terminal further comprises a first end and a second end, the first end and the second end are respectively located at two ends of the power terminal in the first direction, and the first end is used for being connected with an electric vehicle; The second end is provided with an assembly hole, a temperature sensor is arranged in the assembly hole, and the distance between the temperature sensor and the first end is greater than or equal to 12 mm and less than or equal to 65 mm.

10. The charging gun according to any one of claims 1-4, characterized in that, The charging gun comprises a plurality of power terminals, a plurality of liquid cooling plates corresponding to the power terminals, and a plurality of insulating heat-conductive pads corresponding to the power terminals; The surface of the first section of the power terminal is covered by the corresponding insulating heat-conductive pad; The wire holder is provided with a plurality of power terminal grooves corresponding to the power terminals, the power terminal and the corresponding insulating heat-conductive pad are arranged in the corresponding power terminal groove, the liquid cooling plate is arranged at the corresponding power terminal, and the power terminal and the corresponding insulating heat-conductive pad are crimped on the wire holder by the corresponding liquid cooling plate; The plurality of liquid cooling plates are arranged in parallel.

11. A charging device, characterized by The charging gun comprises a charging pile and the charging gun according to any one of claims 1-10; The charging pile comprises a power supply assembly and a liquid supply assembly, the power supply assembly is electrically connected with the power terminal of the charging gun through the power line of the charging gun; The charging gun comprises an inlet pipe and a return pipe, the outlet end of the liquid supply assembly is connected with the inlet end of the liquid cooling plate of the charging gun through the inlet pipe, and the outlet end of the liquid cooling plate is connected with the return liquid end of the liquid supply assembly through the return pipe.

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