High-power charging gun sealing system

Abstract

The utility model provides a high-power charging gun sealing system which comprises a DC terminal and a three-way assembly connected with the DC terminal in a matched mode, and the DC terminal and the three-way assembly are fixedly arranged at the gun head of a charging gun through terminal pressing blocks respectively. The terminal pressing block extends in the axial direction of the DC terminal and is combined with the three-way assembly and the DC terminal to form a cavity, and sealant is arranged in the cavity. After the three-way assembly and the DC terminal are connected and fixed, the sealant is poured into the space around the terminal pressing block to form dual protection and prevent liquid leakage, and meanwhile, the addition of the sealant enhances the fixation of the terminal and provides an additional heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of charging guns, in particular to a high-power charging gun sealing system. Background Art

[0002] In the design and manufacture of high-power DC charging guns, due to the particularity of their working environment, there are indeed some industry challenges and deficiencies.

[0003] Mainly reflected in: traditional plastic materials may not meet the temperature resistance, chemical resistance and mechanical strength requirements of high-power charging guns in high-temperature and corrosive environments; at the same time, in high-current and high-power applications, the sealing performance of the terminal connection of the charging gun is crucial. If the sealing structure is not properly designed, it will lead to coolant leakage, affecting the performance and safety of the charging gun. In addition, if there are not enough heat dissipation measures in the charging gun design, it will also cause the equipment to overheat, affecting performance and life. Summary of the Utility Model

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a high-power charging gun sealing system to solve the problems raised in the above background art. After the tee and the DC terminal are connected and fixed, sealant is poured into the space around the terminal block to completely seal the terminal connection, playing a dual protection role against liquid leakage. At the same time, the potting compound has a heat dissipation effect, solving the problems in the prior art.

[0005] In order to achieve the above purpose, the utility model is realized by the following technical solutions: In order to achieve the above purpose, the utility model is realized by the following technical solutions: A high-power charging gun sealing system includes a DC terminal and a tee assembly adapted to be connected to the DC terminal. Among them, the DC terminal and the tee assembly are respectively fixed to the charging gun head through a terminal block; the terminal block extends along the axial direction of the DC terminal and forms a cavity in combination with the tee assembly and the DC terminal, and the cavity is filled with sealant.

[0006] Compared with the prior art, the beneficial effects of the utility model are:

[0007] To solve the problems of sealing and structural stability of high-power DC charging guns in high-temperature and corrosive environments, the present utility model proposes that, first, for the heat generated during high-current and high-power operations and corrosive coolant (such as oil or ethylene glycol), a PEEK material with high temperature resistance, corrosion resistance, self-lubricity, and good mechanical properties is used to manufacture the tee assembly; second, an optimized tee structure with one inlet and two outlets is proposed, with the upper part sealed by a plug and the two sides pressed into the tee joints, which simplifies the connection method, enhances the structural strength, and achieves an excellent sealing effect; third, a rubber gasket is assembled at the DC terminal connection to align with the tee outlet, and an interference fit is achieved by screwing into the tee joint to achieve a waterproof effect. At the same time, the direct participation of the tee main structure in sealing is avoided, reducing the risk of sealing failure. An inlet liquid rubber gasket is assembled at the tee inlet, and the flanging joint is tightened. Through the interference fit between the flanging of the inlet liquid pipe and the rubber gasket, the waterproof performance is enhanced; finally, after the tee and the DC terminal are connected and fixed, sealant is poured into the space around the terminal block to form a double protection against liquid leakage. At the same time, the addition of the sealant strengthens the fixation of the terminal and provides an additional heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0009] Figure 1 is a schematic structural diagram of the glue filling design of the tee assembly proposed in an embodiment of the present utility model;

[0010] Figure 2 is a schematic structural diagram of the overall installation of the DC rubber gasket and the inlet liquid rubber gasket proposed in an embodiment of the present utility model;

[0011] Figure 3 is a schematic structural diagram of the tee assembly proposed in an embodiment of the present utility model;

[0012] Figure 4 is a schematic structural diagram of the interference fit between the tee assembly and the DC rubber gasket proposed in an embodiment of the present utility model.

[0013] REFERENCE NUMERALS:

[0014] 1 - DC terminal, 2 - tee assembly, 21 - tee pipe body, 22 - tee plug, 23 - tee joint, 3 - terminal block, 4 - charging gun head, 5 - DC rubber gasket, 6 - inlet liquid pipe, 7 - inlet liquid rubber gasket, 8 - flanging joint, 9 - cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] It is easy to understand that according to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various interchangeable structural forms and implementation manners. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0016] As Figures 1-4 shown, as an embodiment of the present utility model, a technical solution is provided: a high-power charging gun sealing system, including: a DC terminal 1 and a tee assembly 2 adaptively connected to the DC terminal 1.

[0017] It should be noted that due to the problems of sealing performance and structural instability of the DC charging gun in high-temperature and corrosive environments, during specific implementation, it is proposed that the DC terminal 1 and the tee assembly 2 are respectively fixed to the charging gun head 4 through a terminal pressing block 3. The terminal pressing block 3 extends along the axial direction of the DC terminal 1 and forms a cavity 9 in combination with the tee assembly 2 and the DC terminal 1. A sealant is provided inside the cavity 9. The purpose is to fill the sealant in the cavity 9 to ensure complete sealing at the connection between the DC terminal 1 and the tee assembly 2, prevent leakage of coolant or other media, and provide a high level of sealing guarantee. At the same time, the curing of the sealant in the cavity 9 can enhance the fixation of the DC terminal 1 and the tee assembly 2, reduce displacement caused by vibration or thermal expansion, and thus improve the stability and durability of the entire connection structure.

[0018] In an embodiment of the present utility model, the DC terminal 1 includes a terminal DC+ and a power terminal DC- with a hollow structure to achieve an efficient charging process. Both ends of the tee assembly 2 are provided with interfaces matching the DC terminal 1. The interfaces are connected to the DC terminal through threads or insertion, and the connection part is located inside the above-mentioned cavity 9, so as to centrally seal the above-mentioned key connection points, ensure the sealing performance of the entire system, prevent leakage of coolant or other media, and at the same time make the appearance of the charging gun more tidy and reduce interference from external factors to the connection points.

[0019] Based on the above technical concept, since the high-power DC charging gun has large current, high power, high temperature, and the coolant is oil or ethylene glycol with certain corrosiveness, the requirements for materials are relatively high, and general plastic materials have more or less limitations. Therefore, the tee assembly 2 is made of PEEK material. The tee assembly 2 includes a tee pipe main body 21, a tee plug 22 and a tee joint 23 respectively fixed to the end part and the side part of the tee pipe main body 21. It can be understood that the tee assembly 2 is designed with one inlet and two outlets, with a plug for sealing at the upper part and the tee joints 23 pressed into both sides. Therefore, the designed tee assembly 2 has the characteristics of simple connection, good structural strength and excellent sealing effect.

[0020] In an embodiment of the present utility model, a DC rubber gasket 5 is fixedly provided at the connection between the tee joint 23 and the DC terminal 1. The DC rubber gasket 5 is in interference connection with the tee joint 23 to enhance the sealing performance. At the same time, a liquid inlet pipe 6 is connected to the other side of the tee pipe body 21 far from the connection with the DC terminal 1 by threading or insertion. A flanged joint 8 is sleeved on the outer peripheral surface of the liquid inlet pipe 6. An inlet liquid rubber gasket 7 is fixedly provided at the connection between the flanged joint 8 and the tee pipe body 21. The inlet liquid rubber gasket 7 is in interference connection with the flanged joint 8 to enhance the waterproof performance. It can be understood that the sealing method of the tee assembly 2 is as follows: (1) Assemble the DC rubber gasket 5 in the holes of the two-side DC terminals 1, align the tee interface 23 with it, and screw the tee joint 23 with a wrench to make the tee pipe body 21 and the DC rubber gasket 5 in interference fit to achieve the waterproof effect. During sealing, only the tee pipe body 21 and the DC rubber gasket 5 are pressed together, but the entire tee structure is not involved in the sealing; (2) Assemble the inlet liquid rubber gasket 7 to the inlet of the tee pipe body 21, and tighten the flanged inlet liquid joint 8 to make the flange of the liquid inlet pipe 6 and the inlet liquid rubber gasket 7 in interference fit to achieve the waterproof effect.

[0021] The technical principle of the present utility model is as follows: Through the integrated sealing structure design, first, the DC terminal 1 and the tee assembly 2 are fixed to the terminal pressing block 3 of the charging gun head 4, forming a cavity 9 extending along the axial direction of the DC terminal 1 and internally filled with sealant to achieve double-sealing protection to prevent coolant leakage. Second, the tee assembly 2 is made of PEEK material with high temperature resistance and corrosion resistance, and the tee structure is optimized to be one-inlet and two-outlets, simplifying the connection and enhancing the structural strength. Third, by using interference-fit rubber gaskets at the connection between the tee joint 23 and the DC terminal 1 and at the connection of the liquid inlet pipe 6, the sealing performance and waterproof performance are further improved. At the same time, the sealant poured into the cavity 9 plays the role of heat dissipation and structural strengthening, and the hollow design of the DC terminal 1 effectively manages the heat generated during the charging process to ensure efficient thermal management.

[0022] The technical scope of the present utility model is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications should all fall within the protection scope of the present utility model.

Claims

1. A high-power charging gun sealing system, characterized in that, including a DC terminal and a tee assembly adaptively connected to the DC terminal, wherein the DC terminal and the tee assembly are respectively fixed to the charging gun head through terminal pressing blocks; the terminal pressing block extends along the axial direction of the DC terminal, and combines with the tee assembly and the DC terminal to form a cavity, and a sealant is disposed in the cavity.

2. The high-power charging gun sealing system according to claim 1, wherein the two ends of the tee assembly are provided with interfaces matching the DC terminal, the interfaces are connected to the DC terminal by threading or plugging, and the connection part is located in the cavity.

3. The high-power charging gun sealing system according to claim 2, wherein the tee assembly includes a tee pipe body, a tee plug and a tee joint respectively fixed to the end and side of the tee pipe body.

4. The high-power charging gun sealing system according to claim 3, wherein a DC rubber washer is fixed at the connection part between the tee joint and the DC terminal, and the DC rubber washer is in interference connection with the tee joint.

5. The high-power charging gun sealing system according to claim 3, wherein a liquid inlet pipe is connected to the other side of the tee pipe body far from the connection with the DC terminal by threading or plugging, and a liquid inlet rubber washer is fixed at the connection part between the liquid inlet pipe and the tee pipe body, and the liquid inlet rubber washer is in interference connection with the liquid inlet pipe to enhance waterproofness.

6. The high-power charging gun sealing system according to claim 1, wherein the DC terminal includes a terminal DC+ and a power terminal DC- with a hollow structure to achieve an efficient charging process.

7. The high-power charging gun sealing system according to claim 1, wherein the tee assembly is made of PEEK material.

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