Charging stations and charging systems

Abstract

The present invention discloses a charging station and a charging system, wherein the charging station includes: a wiring harness terminal group; a charging terminal group, the charging terminal group having a receiving groove and electrically connected to the wiring harness terminal group; and an insulating member, the insulating member at least partially disposed within the receiving groove, the insulating member being connected to a liquid inlet pipe and / or a liquid outlet pipe, the wiring harness terminal group being connected to the liquid inlet pipe and / or the liquid outlet pipe, and coolant flowing from the liquid inlet pipe into the insulating member and then out through the liquid outlet pipe. The charging station of the present invention has good heat dissipation effect and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of direct current charging sockets for electric vehicles, and in particular to a charging seat and a charging system. Background Art

[0002] With the increasing popularity of new energy electric vehicles, charging equipment is increasingly being used, leading to new technical challenges. For example, the higher the charging current, the thicker the cable required, limiting flexibility and resulting in insufficient interior space. During DC charging (high power over 1000V / 400A), the charging terminals generate significant heat, requiring rapid cooling to dissipate the heat.

[0003] In the related art, the heat dissipation of the charging terminal is mainly transferred through the soft wire and shell connecting the charging terminal. Due to the overall closed structure, the heat transfer speed is too slow and the efficiency is low. If the heat dissipation effect is improved by increasing the diameter of the integrated cable soft wire, the diameter of the integrated cable connecting the terminal will become very thick (GB / T 11918.1-2014 nominal current 400A conductor cross-sectional area is 240mm 2 ), the welding process of overly thick cable conductors and charging terminals is also more difficult, and even if they are connected, the overall weight of the integrated cable is inconvenient to operate, the cost will be very high, and the heat dissipation effect is not very ideal.

[0004] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is prior art. Summary of the Invention

[0005] The main purpose of the present invention is to provide a charging stand, aiming to reduce production costs and improve the heat dissipation efficiency of the charging stand.

[0006] To achieve the above-mentioned purpose, the charging stand proposed by the present invention comprises:

[0007] Wiring harness terminal set;

[0008] a charging terminal group, the charging terminal group being provided with a receiving groove and electrically connected to the wiring harness terminal group; and

[0009] An insulating member, wherein the insulating member is at least partially disposed in the accommodating groove, the insulating member is connected to a liquid inlet pipe and a liquid outlet pipe, the wiring harness terminal group is connected to the liquid inlet pipe and / or the liquid outlet pipe, and the coolant flows into the insulating member from the liquid inlet pipe and then flows out from the liquid outlet pipe.

[0010] Optionally, the charging terminal group includes a positive charging terminal and a negative charging terminal that are spaced apart, and the accommodating slot includes a first through slot and a second through slot, the positive charging terminal is provided with the first through slot, and the negative charging terminal is provided with the second through slot;

[0011] The insulating member has a accommodating space, and is provided with a liquid inlet and a liquid outlet communicated with the accommodating space, the liquid inlet pipe is communicated with the liquid inlet, the liquid outlet pipe is communicated with the liquid outlet, the liquid inlet and the liquid outlet are spaced apart, the insulating member is at least partially disposed in the first through groove and the second through groove, and is limited to the positive charging terminal and the negative charging terminal, the coolant flows into the accommodating space from the liquid inlet and flows out of the liquid outlet.

[0012] Optionally, the insulating member includes a positive insulating portion, a negative insulating portion, and an intermediate insulating portion, the intermediate insulating portion being connected to the positive insulating portion and the negative insulating portion, respectively; the positive insulating portion having a first cavity, the negative insulating portion having a second cavity, the intermediate insulating portion being provided with a communicating cavity, the first cavity, the second cavity, and the communicating cavity being interconnected to form the accommodating space, and the intermediate insulating portion being provided with the liquid inlet and the liquid outlet;

[0013] The positive electrode insulating portion is at least partially accommodated in the first through-groove, the negative electrode insulating portion is at least partially accommodated in the second through-groove, and the intermediate insulating portion is provided between the positive charging terminal and the negative charging terminal.

[0014] Optionally, the positive charging terminal includes a first terminal base, the side wall of which is provided with a first limiting groove communicating with the first cavity, and the negative charging terminal includes a second terminal base, the side wall of which is provided with a second limiting groove communicating with the second cavity, and the two ends of the intermediate insulating part are respectively limited at the first limiting groove and the second limiting groove.

[0015] Optionally, the intermediate insulating part includes a first connecting member, a second connecting member and an intermediate connecting member, the two ends of the intermediate connecting member are respectively connected to the first connecting member and the second connecting member, the first connecting member is provided with a first cavity, the second connecting member is provided with a second cavity, and the intermediate connecting member is provided with an intermediate cavity, the intermediate cavity is respectively connected with the first cavity and the second cavity to form the connecting cavity, the first cavity is connected with the liquid inlet, and the second cavity is connected with the liquid outlet.

[0016] Optionally, the wiring harness terminal group is provided with a mounting hole, and the first connector and / or the second connector is limited to the mounting hole.

[0017] Optionally, the intermediate cavity includes a first communicating pipe and a second communicating pipe connected to the first communicating pipe at an angle, the first communicating pipe is connected to the first cavity, and the second communicating pipe is connected to the second cavity.

[0018] Optionally, the charging stand further includes a first sealing ring and a second sealing ring, wherein the first sealing ring is located at the connection between the positive insulating part and the middle insulating part, and the second sealing ring is located at the connection between the negative insulating part and the middle insulating part.

[0019] Optionally, the charging base further includes a mounting base, the mounting base is provided with sockets for connecting the positive pole and the negative pole of the charging pile respectively, and the charging terminal group is arranged in the sockets.

[0020] The present invention also provides a charging system, comprising a charging base and a charging pile, wherein the charging pile is electrically connected to the charging base, and the charging base is the charging base described above.

[0021] The charging seat of the present invention includes a wiring harness terminal group, a charging terminal group and an insulating member. The charging terminal group is electrically connected to the wiring harness terminal group. Since the heat generated when the charging seat is working is mainly concentrated in the wiring harness terminal group and the charging terminal group, a receiving groove is provided in the charging terminal group, and the insulating member is at least partially provided in the receiving groove. The insulating member is connected to a liquid inlet pipe and a liquid outlet pipe, and the wiring harness terminal group is connected to the liquid inlet pipe and / or the liquid outlet pipe. When the coolant flows into the insulating member from the liquid inlet pipe and then flows out from the liquid outlet pipe, the heat generated by the wiring harness terminal group and the charging terminal group can be quickly taken away, the heat dissipation efficiency is high, and there is no need to thicken the cables, and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of an embodiment of a charging stand of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of a partial cross-section of the charging base;

[0025] Figure 3 This is a schematic diagram of a partially exploded structure of the charging base of the present invention;

[0026] Figure 4 This is another exploded structural diagram of the charging stand of the present invention;

[0027] Figure 5 This is a schematic structural diagram of an embodiment of a positive charging terminal or a negative charging terminal of the present invention;

[0028] Figure 6 Schematic diagram of the structure of an embodiment of the intermediate insulating portion of the present invention.

[0029] Description of Figure Numbers:

[0030]

[0031]

[0032] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] The present invention provides a charging stand 100 .

[0038] Reference Figures 1 to 4 In an embodiment of the present invention, the charging station 100 includes:

[0039] Wiring harness terminal group 10;

[0040] a charging terminal group 30 , wherein the charging terminal group 30 is provided with a receiving groove 31 and the charging terminal group 30 is electrically connected to the wiring harness terminal group 10 ; and

[0041] The insulating member 50 is at least partially disposed in the accommodating groove 31 . The insulating member 50 is connected to the liquid inlet pipe 20 and the liquid outlet pipe 40 . The wiring harness terminal group 10 is connected to the liquid inlet pipe 20 and / or the liquid outlet pipe 40 . The coolant flows into the insulating member 50 from the liquid inlet pipe 20 and then flows out from the liquid outlet pipe 40 .

[0042] Specifically, one end of the wiring harness terminal group 10 is electrically connected to the charging terminal group 30, and the other end is integratedly connected to the wiring harness. The wiring harness is connected to the power supply or the vehicle-end battery. The end of the charging terminal group 30 away from the wiring harness terminal group 10 is connected to the charging pile (not shown).

[0043] The charging terminal assembly 30 is provided with a receiving groove 31, within which an insulating member 50 is positioned. The insulating member 50 is made of an insulating material, such as ceramic, plastic, or a metal heat pipe coated with a heat-dissipating insulating varnish, though this is not specifically limited. The insulating member 50 is a hollow component through which a coolant, such as water or propylene glycol, can be passed and circulated. Furthermore, the coolant enters the insulating member 50, flows out, and then refluxes, thereby dissipating heat generated by the charging terminal assembly 30.

[0044] The insulating member 50 is connected to the liquid inlet pipe 20 and the liquid outlet pipe 40, enabling the circulation of the coolant. The wiring harness terminal group 10 is connected to the liquid inlet pipe 20 and / or the liquid outlet pipe 40, that is, connected to the outer surface of the liquid inlet pipe 20 and / or the liquid outlet pipe 40. The liquid inlet pipe 20 and / or the liquid outlet pipe 40 use a water-cooled cable, that is, a copper-clad water structure cable. The outer periphery of the water-cooled cable is copper wire, and the center of the circle is a water pipe. This water-cooled cable structure can separate water and electricity. The outer copper wire of the water-cooled cable is connected to the wiring harness terminal group 10 to achieve electrical conduction. The wiring harness terminal group 10 is insulated from the water pipe in the water-cooled cable, thereby achieving the purpose of water-electricity insulation. When the coolant circulates in the liquid inlet pipe 20 and the liquid outlet pipe 40, the heat generated by the wiring harness terminal group 10 is concentrated on the outer copper wire, which is conducive to carrying away the heat generated by the wiring harness terminal group 10, achieving the purpose of heat dissipation and cooling. The cross-sectional area of the water-cooled cable is 35mm2, which is relatively thin and does not take up space.

[0045] The charging seat 100 of the present invention includes a wiring harness terminal group 10, a charging terminal group 30 and an insulating member 50. The charging terminal group 30 is electrically connected to the wiring harness terminal group 10. Since the heat generated when the charging seat 100 is working is mainly concentrated in the wiring harness terminal group 10 and the charging terminal group 30, a receiving groove 31 is provided in the charging terminal group 30, and the insulating member 50 is at least partially provided in the receiving groove 31. The insulating member 31 is connected to the liquid inlet pipe 20 and the liquid outlet pipe 40. The wiring harness terminal group 10 is connected to the liquid inlet pipe 20 and / or the liquid outlet pipe 40. When the coolant flows from the liquid inlet pipe 20 into the insulating member 50 and then flows out from the liquid outlet pipe 40, the heat generated by the wiring harness terminal group 10 and the charging terminal group 30 can be quickly taken away, the heat dissipation efficiency is high, and there is no need to thicken the cables, and the production cost is low.

[0046] Furthermore, the charging terminal group 30 in this embodiment includes a positive charging terminal 33 and a negative charging terminal 35 spaced apart from each other. The accommodating slot 31 includes a first through slot 311 and a second through slot 313. The positive charging terminal 33 is provided with the first through slot 311, and the negative charging terminal 35 is provided with the second through slot 313.

[0047] The insulating member 50 has a accommodating space, and is provided with a liquid inlet 51a and a liquid outlet 51b connected to the accommodating space. The liquid inlet pipe 20 is connected to the liquid inlet 51a, and the liquid outlet pipe 40 is connected to the liquid outlet 51b. The liquid inlet 51a and the liquid outlet 51b are arranged at intervals. The insulating member 50 is at least partially arranged in the first through groove 311 and the second through groove 313, and is limited to the positive charging terminal 33 and the negative charging terminal 35. The coolant flows into the accommodating space from the liquid inlet 51a and flows out of the liquid outlet 51b.

[0048] A first through-slot 311 is provided in the positive charging terminal 33, and a second through-slot 313 is provided in the negative charging terminal 35 to achieve better heat dissipation. To facilitate installation, the charging stand 100 also includes a mounting base 80, which is provided with sockets 80a for connecting to the positive and negative poles of the charging pile, respectively. The charging terminal group 30 is disposed within the sockets 80a, that is, the positive charging terminal 33 is disposed within the socket 80a for connecting to the positive pole, and the negative charging terminal 35 is disposed within the socket 80a for connecting to the negative pole. The mounting base 80 includes a base 83, a top cover 81, and a sealing member 85. The sealing member 85 is sandwiched between the base 83 and the top cover 81 for sealing. The base 83 and the top cover 81 are both made of materials with good insulating properties, such as flame-retardant PC, flame-retardant PP, or fiberglass, for electrical insulation.

[0049] Reference Figure 2 and Figure 6 To facilitate demolding, the insulating member 50 includes a positive insulating portion 53, a negative insulating portion 55, and an intermediate insulating portion 57. The intermediate insulating portion 57 is connected to the positive insulating portion 53 and the negative insulating portion 55, respectively. The positive insulating portion 53 has a first cavity 531, the negative insulating portion 55 has a second cavity 551, and the intermediate insulating portion 57 has a connecting cavity 571. The first cavity 531, the second cavity 551, and the connecting cavity 571 are interconnected to form the accommodating space. The intermediate insulating portion 57 is provided with the liquid inlet 51a and the liquid outlet 51b.

[0050] The positive insulating portion 53 is at least partially accommodated in the first through-slot 311 , the negative insulating portion 55 is at least partially accommodated in the second through-slot 313 , and the intermediate insulating portion 57 is provided between the positive charging terminal 33 and the negative charging terminal 35 .

[0051] In this embodiment, the positive electrode insulation 53, the negative electrode insulation 55, and the intermediate insulation 57 are made of plastic, ceramic, or metal with an insulating layer sprayed on the surface. To improve heat dissipation, the positive electrode insulation 53 and the negative electrode insulation 55 are made of ceramic, which has good thermal conductivity and electrical insulation properties and good heat dissipation. The intermediate insulation 57 is made of plastic. The positive electrode insulation 53 and the intermediate insulation 57 are sealed together, and the negative electrode insulation 55 and the intermediate insulation 57 are sealed together. Furthermore, the charging station 100 also includes a first sealing ring 70 and a second sealing ring 90. The first sealing ring 70 is located at the connection between the positive electrode insulation 53 and the intermediate insulation 57, and the second sealing ring 90 is located at the connection between the negative electrode insulation 55 and the intermediate insulation 57 to prevent coolant from leaking out and posing a safety hazard. The first sealing ring 70 and the second sealing ring 90 are made of a plastic with a certain degree of elasticity, such as silicone rubber.

[0052] Good waterproof effect.

[0053] To improve heat dissipation, the positive insulating portion 53 is a cylindrical structure that matches the wall of the first through-slot 311 and abuts the wall. The negative insulating portion 55 is a cylindrical structure that matches the wall of the second through-slot 313 and abuts the wall, providing a stable structure. Of course, the positive insulating portion 53 and the negative insulating portion 55 can also be square or other shapes, without specific limitation.

[0054] Reference Figure 5 To ensure stability in the connection between the insulating member 50 and the charging terminal assembly 30, the positive charging terminal 33 includes a first terminal base 331, the sidewall of which is provided with a first limiting groove 333 communicating with the first cavity 531. The negative charging terminal 35 includes a second terminal base 351, the sidewall of which is provided with a second limiting groove 353 communicating with the second cavity 551. The ends of the intermediate insulating portion 57 are respectively limited by the first limiting groove 333 and the second limiting groove 353.

[0055] Specifically, the first terminal base 331 and the second terminal base 351 are both made of conductive materials. The upper end of the first terminal base 331 is provided with a first cavity 531, and the lower end of the first terminal base 331 is provided with a first rotating spring (not shown in the figure). The first rotating spring is connected to the positive pole of the charging pile. The upper end of the second terminal base 351 is provided with a second cavity 551, and the lower end of the second terminal base 351 is provided with a second rotating spring (not shown in the figure). The second rotating spring is connected to the positive pole of the charging pile.

[0056] Please refer again Figure 6 The intermediate insulating part 57 includes a first connecting member 573, a second connecting member 575 and an intermediate connecting member 577. The two ends of the intermediate connecting member 577 are respectively connected to the first connecting member 573 and the second connecting member 575. The first connecting member 573 is provided with a first cavity 573a, the second connecting member 575 is provided with a second cavity 575a, and the intermediate connecting member 577 is provided with an intermediate cavity 577a. The intermediate cavity 577a is respectively connected with the first cavity 573a and the second cavity 575a to form the connecting cavity 571. The first cavity 573a is connected with the liquid inlet 51a, and the second cavity 575a is connected with the liquid outlet 51b.

[0057] In this embodiment, the first connector 573 matches the outer shape of the positive electrode insulating portion 53, such as a cylindrical shape, and the second connector 575 matches the outer shape of the negative electrode insulating portion 55, such as a cylindrical shape. The intermediate connector 577 serves to connect the first cavity 573a and the second cavity 575a. The intermediate connector 577 has a plate-like structure, which facilitates the restraint of the first connector 573 in the first limiting groove 333 and the second connector 575 in the second limiting groove 353, thereby ensuring structural stability.

[0058] Furthermore, in order to facilitate demolding, the intermediate cavity 577a includes a first communicating pipe 5771 and a second communicating pipe 5773 connected to the first communicating pipe 5771 at an angle, the first communicating pipe 5771 is connected to the first cavity 573a, and the second communicating pipe 5773 is connected to the second cavity 575a.

[0059] Please refer again Figure 3 To ensure a secure connection between the insulating member 50 and the wiring harness terminal assembly 10, the wiring harness terminal assembly 10 is provided with a mounting hole 10a, and the first connector 573 and / or the second connector 575 are confined within the mounting hole 10a. When coolant flows within the first connector 573 and / or the second connector 575, it simultaneously dissipates heat from the wiring harness terminal assembly 10, resulting in effective heat dissipation. The wiring harness terminal assembly 10 can be a single connection terminal or two connection terminals corresponding to the positive charging terminal 33 and the negative charging terminal 35, all of which are within the scope of protection of this patent.

[0060] The present invention also proposes a charging system, which includes a charging base 100. The specific structure of the charging base 100 refers to the above-mentioned embodiment. Since this charging system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0061] In this embodiment, the charging system includes a charging station 100 and a charging pile (not shown). The charging pile is electrically connected to the charging station 100. When the electric vehicle is charging, the current flow path between the charging pile and the charging station 100 is from the charging terminal group 30 to the wiring harness terminal group 10. The end of the wiring harness terminal group 10 away from the charging terminal group 30 is connected to the wiring harness assembly, and the end of the charging terminal group 30 away from the wiring harness terminal group 10 is connected to the charging pile. The connection method can be any reliable connection method such as welding, riveting, and crimping.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A charging stand, characterized in that: include: Wiring harness terminal set; a charging terminal group, the charging terminal group being provided with a receiving groove and electrically connected to the wiring harness terminal group; as well as an insulating member, wherein the insulating member is at least partially disposed in the accommodating groove, the insulating member is connected to a liquid inlet pipe and a liquid outlet pipe, the wiring harness terminal group is connected to the liquid inlet pipe and / or the liquid outlet pipe, and the coolant flows into the insulating member from the liquid inlet pipe and then flows out from the liquid outlet pipe; The charging terminal group includes a positive charging terminal and a negative charging terminal arranged at intervals, the accommodating groove includes a first through groove and a second through groove, the positive charging terminal is provided with the first through groove, and the negative charging terminal is provided with the second through groove; the insulating member has an accommodating space, and the insulating member is provided with a liquid inlet and a liquid outlet communicating with the accommodating space, the liquid inlet pipe is communicated with the liquid inlet, and the liquid outlet pipe is communicated with the liquid outlet, the liquid inlet and the liquid outlet are arranged at intervals, the insulating member is at least partially provided in the first through groove and the second through groove, and is confined to the positive charging terminal and the negative charging terminal, the coolant flows into the accommodating space from the liquid inlet and flows out at the liquid outlet; The insulating member includes a positive insulating portion, a negative insulating portion, and an intermediate insulating portion. The intermediate insulating portion is connected to the positive insulating portion and the negative insulating portion, respectively. The positive insulating portion has a first cavity, the negative insulating portion has a second cavity, and the intermediate insulating portion is provided with a connecting cavity. The first cavity, the second cavity, and the connecting cavity are interconnected to form the accommodating space. The intermediate insulating portion is provided with the liquid inlet and the liquid outlet. The positive insulating portion is at least partially accommodated in the first through-groove, the negative insulating portion is at least partially accommodated in the second through-groove, and the intermediate insulating portion is provided between the positive charging terminal and the negative charging terminal. The positive electrode insulating portion, the negative electrode insulating portion and the intermediate insulating portion are made of plastic, ceramic or metal with an insulating layer sprayed on the surface; The positive electrode insulating portion is a cylindrical structure adapted to the groove wall of the first through-groove, and the positive electrode insulating portion abuts against the groove wall of the first through-groove; the negative electrode insulating portion is a cylindrical structure adapted to the groove wall of the second through-groove, and the negative electrode insulating portion abuts against the groove wall of the second through-groove; The positive charging terminal includes a first terminal base, a side wall of which is provided with a first limiting groove communicating with the first cavity; the negative charging terminal includes a second terminal base, a side wall of which is provided with a second limiting groove communicating with the second cavity, and the ends of the intermediate insulating portion are respectively limited in the first limiting groove and the second limiting groove; The intermediate insulating portion includes a first connector, a second connector, and an intermediate connector. The two ends of the intermediate connector are respectively connected to the first connector and the second connector. The first connector is provided with a first cavity, the second connector is provided with a second cavity, and the intermediate connector is provided with an intermediate cavity. The intermediate cavity is respectively communicated with the first cavity and the second cavity to form the communicating cavity. The first cavity is communicated with the liquid inlet, and the second cavity is communicated with the liquid outlet. The first connector is cylindrical and matches the outer shape of the positive electrode insulating portion; the second connector is cylindrical and matches the outer shape of the negative electrode insulating portion; the intermediate connector is a plate-shaped structure to limit the first connector to the first limiting groove and the second connector to the second limiting groove; The wiring harness terminal group is provided with a mounting hole, and the first connector and / or the second connector is limited to the mounting hole; The intermediate cavity includes a first communicating pipe and a second communicating pipe connected to the first communicating pipe at an angle, the first communicating pipe is connected to the first cavity, and the second communicating pipe is connected to the second cavity.

2. The charging stand according to claim 1, wherein: The charging stand also includes a first sealing ring and a second sealing ring. The first sealing ring is located at the connection between the positive insulating part and the middle insulating part, and the second sealing ring is located at the connection between the negative insulating part and the middle insulating part.

3. The charging stand according to any one of claims 1 to 2, wherein: The charging base also includes a mounting base, which is provided with sockets for conducting the positive pole and the negative pole of the charging pile respectively, and the charging terminal group is arranged in the sockets.

4. A charging system, characterized in that: The invention comprises a charging base and a charging pile, wherein the charging pile is electrically connected to the charging base, and the charging base is the charging base according to any one of claims 1 to 3.

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