Charging liquid cooling terminal structure

Abstract

The utility model discloses a charging liquid cooling terminal structure which comprises charging terminals and a cooling box body, two ends of the two charging terminals respectively penetrate through the cooling box body to be arranged in a limiting and sealing mode, and the front ends of the charging terminals are flat and used for being welded with wires. The surface of the ceramic spraying position, located in the cooling box body, of the charging terminal is coated with an aluminum oxide ceramic coating with an insulation function, and the aluminum oxide ceramic coating is used for making contact with cooling liquid. According to the utility model, through the arrangement of the corresponding matching structure of the charging terminal and the cooling box body, the cooling box body is larger and can accommodate more cooling liquid; and corresponding sealing and limiting structures are arranged, so that dismounting and mounting are convenient. The aluminum oxide ceramic coating can directly use water with large specific heat capacity and cooling liquid of ethylene glycol to cool the positive and negative charging terminals at the same time, and the cooling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of new energy charging technology, specifically, a charging liquid-cooled terminal structure. Background Technology

[0002] With the development of new energy charging technology, the demand for fast charging is increasing, and the charging current is becoming larger. During high-power charging, the terminals of the charging gun generate a large amount of heat. The high temperature generated by continuous charging will trigger over-temperature protection, causing charging to be interrupted. Therefore, temperature control is extremely important during high-power charging, and effective cooling measures need to be taken.

[0003] Traditional charging gun cooling structures involve the charging terminals contacting an insulating material before contacting a metal water tank, or the metal terminals contacting a water tank made of thermally conductive materials such as engineering plastics or ceramics for heat transfer to achieve a cooling effect, or the conductive parts of the charging terminals directly contacting the insulating coolant. These methods are complex and difficult to implement; furthermore, the specific heat capacity of oils used as coolants is usually lower than that of water plus ethylene glycol coolants, resulting in poor heat dissipation. Utility Model Content

[0004] To address the aforementioned technical problems of installation difficulties and poor heat dissipation, the present invention aims to provide a charging liquid-cooled terminal structure. This structure achieves contact with a coolant consisting of water and ethylene glycol by setting a corresponding charging terminal and cooling box matching structure, and by coating the surface of the charging terminal with an insulating alumina ceramic coating.

[0005] The present invention solves the above problems through the following technical solution:

[0006] A charging liquid-cooled terminal structure includes: charging terminals and a cooling box. The two ends of the two charging terminals are respectively limited and sealed through the cooling box. The front end of the charging terminal is flat and used for welding with a wire. The ceramic coating on the surface of the charging terminal located in the cooling box is coated with an insulating alumina ceramic coating for contact with the coolant.

[0007] As a further improvement, the two wires are respectively soldered to the outer front end of the two charging terminals.

[0008] As a further improvement, the rear end face of the cooling box is formed with a limiting cavity to accommodate the elastic retaining ring, so as to limit the installation of the elastic retaining ring sleeved on the rear end of the charging terminal through the limiting cavity.

[0009] As a further improvement, liquid flow chambers are formed on the left and right sides of the cooling box, and a liquid passage connecting the two liquid flow chambers is formed; a first O-shaped cavity and a second O-shaped cavity are formed at the front and rear ends of the cooling box, respectively, so that the two ends of the charging terminals can pass through the cooling box.

[0010] As a further improvement, the rear end cover of the cooling box is used to cover the entire cooling box, and the first O-shaped cavity is disposed on the rear end cover.

[0011] As a further improvement, a water nozzle is provided at the front end of the cooling box, which is connected to the liquid flow chamber, and the two water nozzles are staggered vertically.

[0012] As a further improvement, the water tap is a variable diameter pagoda water tap, which is connected to the water pipe through a pipe clamp to achieve tight clamping.

[0013] As a further improvement, a terminal limiting post is provided on the front end face of the cooling box outside the second O-shaped cavity to radially limit the front end of the charging terminal.

[0014] As a further improvement, the charging terminal includes, in sequence, a terminal conductive part, an elastic retaining ring mounting part, a first O-ring mounting part, a ceramic spraying part, a second O-ring mounting part, a terminal limiting part, and a wire welding part. The first and second O-ring mounting parts are each fitted with an O-ring, and when the charging terminal is installed inside the cooling box, the first and second O-ring mounting parts are located within the first and second O-ring cavities of the cooling box, respectively, to achieve a sealed fit. The elastic retaining ring mounting part is used to install an elastic retaining ring, and the elastic retaining ring is embedded in the limiting cavity outside the first O-ring cavity.

[0015] As a further improvement, the terminal limiting point is arc-shaped and perpendicular to the wire welding point, and is used to abut against the front end face of the cooling box to achieve axial limiting;

[0016] And / or the surface of the mounting area of ​​the elastic retaining ring is coated with an alumina ceramic coating.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0018] (1) This utility model has a larger cooling box structure by setting up corresponding charging terminals and cooling box, which can hold more coolant; and it has corresponding sealing and limiting structures to facilitate disassembly and installation.

[0019] (2) By spraying an insulating alumina ceramic coating onto the surface of the charging terminal, the positive and negative charging terminals can be cooled simultaneously by water with a high specific heat capacity and ethylene glycol, thereby improving cooling efficiency and reducing costs while achieving the desired cooling effect.

[0020] (3) The present invention can also spray an alumina ceramic coating on the part of the outer periphery of the charging terminal that needs to be cooled, and then use machining to make the alumina ceramic coating have a high gloss, thereby reducing the resistance when the coolant flows around the charging terminal. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a charging liquid-cooled terminal structure according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the charging terminal of this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the cooling box of this utility model;

[0024] Figure 4 This is a schematic diagram showing the connection between the charging terminal and the cooling box of this utility model.

[0025] Reference numerals: 1. Charging terminal; 101. Ceramic coating area; 102. Elastic retaining ring mounting area; 103. Terminal conductive area; 104. First O-ring mounting area; 105. Wire welding area; 106. Terminal limiting area; 107. Second O-ring mounting area; 2. Cooling box; 201. Liquid flow chamber; 202. First O-ring opening; 203. Liquid passage; 204. Rear end cover; 205. Terminal limiting post; 206. Water nozzle; 3. Wire; 4. Water pipe; 5. Pipe clamp; 6. Elastic retaining ring; 7. O-ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example:

[0028] Combined with appendix Figure 1-4As shown, a liquid-cooled charging terminal structure includes: two charging terminals 1, a cooling box 2, wires 3, water pipes 4, and pipe clamps 5. The two charging terminals 1 are disposed through the cooling box 2 at both ends. The rear end face of the cooling box 2 forms a limiting cavity to accommodate an elastic retaining ring 6, thereby axially limiting the installation of the elastic retaining ring 6 fitted outside the rear end of the charging terminal 1. The front end of the charging terminal 1 is flat for welding to the wires 3. The ceramic coating 101 of the charging terminal 1 located inside the cooling box 2 is coated with an insulating alumina ceramic coating for contact with the coolant. In this embodiment, preferably, the two wires 3 are welded to the outer sides of the front ends of the two charging terminals 1.

[0029] The cooling housing 2 has liquid flow chambers 201 formed on the left and right sides, and a liquid passage 203 connecting the two liquid flow chambers 201. The entire cooling housing is covered by a rear end cover 204, on which a first O-shaped opening 202 is disposed. A second O-shaped opening is formed at the front end of the cooling housing 2 relative to the first O-shaped opening 202, so that two charging terminals 1 can pass through the cooling housing 2 through the first O-shaped opening 202 and the second O-shaped opening. Terminal limiting posts 205 are provided on the front end face of the cooling housing 2 outside the second O-shaped opening. In this embodiment, two terminal limiting posts 205 are provided outside each second O-shaped opening, and the center of the two terminal limiting posts 205 is the center of the second O-shaped opening.

[0030] In this embodiment, the front end of the cooling box 2 is connected to a water nozzle 206, and the two water nozzles are respectively connected to the left and right liquid flow chambers 201; preferably, the two water nozzles are staggered vertically to realize liquid inlet and liquid outlet.

[0031] In one alternative, the water tap 206 is a reducing pagoda-shaped water tap, which facilitates the use of pipe clamps 5 to tighten the pipe when it is connected to the water pipe 4.

[0032] In a preferred embodiment, the charging terminal 1 includes a terminal conductive part 103, an elastic retaining ring mounting part 102, a first O-ring mounting part 104, a ceramic spraying part 101, a second O-ring mounting part 107, a terminal limiting part 106, and a wire welding part 105 arranged sequentially. The first O-ring mounting part 104 and the second O-ring mounting part 107 are respectively fitted with O-rings. When the charging terminal 1 is installed inside the cooling box 2, the first O-ring mounting part 104 and the second O-ring mounting part 107 are respectively located within the first O-ring cavity 202 and the second O-ring cavity 2 to achieve a sealed fit. The elastic retaining ring mounting part 102 is used to set the elastic retaining ring 6, and the elastic retaining ring is embedded in the limiting cavity outside the first O-ring cavity 202. The ceramic coating area 101 is located within the liquid flow chamber 201 of the cooling box 2; the terminal limiting area 106 is arc-shaped and perpendicular to the wire welding area 105, used to abut against the front end face of the cooling box 2 to achieve axial limiting. The arc-shaped terminal limiting area 106 also achieves radial limiting through the terminal limiting post 205.

[0033] In another preferred embodiment, the end cap is attached to the front end of the cooling box 2 by welding methods such as laser or friction welding.

[0034] Preferably, both the ceramic spraying area 101 and the elastic retaining ring mounting area 102 are coated with an alumina ceramic coating that serves as an insulating agent. Alumina ceramic is a ceramic material with alumina (Al2O3) as its main component, used in thick-film integrated circuits. An alumina ceramic coating refers to a coating material with alumina ceramic as its coating material, which serves as an insulating agent.

[0035] During installation, after welding wire 3 to wire welding point 105 of charging terminal 1, O-ring 7 is then installed at first O-ring mounting point 104. O-ring 7 forms a radial sealing structure with first O-ring cavity 202. Charging terminal 1 is then assembled into cooling box 2, where terminal limiting point 106 and cooling box 2 provide axial limiting. Terminal limiting post 205 prevents circumferential rotation of the terminal. Axial limiting is further achieved by installing elastic retaining ring 6 at elastic retaining ring mounting point 102 to meet the insulation requirements of charging terminal 1. Water pipe 4 is installed onto water nozzle 206 via pipe clamp 5. Coolant flows in from one of the water nozzles 206, passes through liquid flow chamber 201 and liquid passage 203 to cool the two charging terminals.

[0036] This invention features a simple structure and high installation reliability. Both the ceramic coating area 101 and the elastic retaining ring mounting area 102 are coated with an insulating alumina ceramic coating. The elastic retaining ring mounting area 102, where the O-ring is installed, comes into contact with the coolant and therefore requires insulation. This allows the use of water and ethylene glycol, which have high specific heat capacities, as coolants to cool the ceramic coating area 101. The low viscosity of these coolants also improves cooling efficiency. Alternatively, water and ethylene glycol can be used directly as coolants to simultaneously cool both the positive and negative terminals, achieving the desired cooling effect while reducing costs.

[0037] Alternatively, an alumina ceramic coating can be sprayed onto the outer periphery of the charging terminal where cooling is required, followed by machining to achieve a high degree of smoothness in the ceramic layer, reducing the resistance to the flow of coolant around the charging terminal. For partial insulation of the charging terminal, water and ethylene glycol can be used as coolants, as they have high specific heat capacity and provide better cooling. Furthermore, water and ethylene glycol are generally more cost-effective than other coolants.

[0038] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A liquid-cooled charging terminal structure, characterized in that, include: The charging terminals and cooling box are designed with two charging terminals that pass through the cooling box and are sealed at both ends. The front end of the charging terminals is flat and designed for welding to wires. The charging terminal is located inside the cooling box, and the ceramic coating on the surface is coated with an insulating alumina ceramic coating for contact with the coolant.

2. The charging liquid-cooled terminal structure according to claim 1, characterized in that, The two wires are respectively soldered to the outer front end of the two charging terminals.

3. The charging liquid-cooled terminal structure according to claim 1, characterized in that, The rear end face of the cooling box is formed with a limiting cavity to accommodate the elastic retaining ring, so as to limit the installation of the elastic retaining ring sleeved on the rear end of the charging terminal through the limiting cavity.

4. The charging liquid-cooled terminal structure according to claim 1, characterized in that, The cooling box has liquid flow chambers on the left and right sides, and a liquid passage connecting the two liquid flow chambers; the front and rear ends of the cooling box have a first O-shaped opening and a second O-shaped opening, respectively, so that the two ends of the charging terminal can pass through the cooling box.

5. The charging liquid-cooled terminal structure according to claim 4, characterized in that, The rear end cover of the cooling box is used to cover the entire cooling box, and the first O-shaped cavity is provided on the rear end cover.

6. The charging liquid-cooled terminal structure according to claim 4, characterized in that, The front end of the cooling box is connected to the liquid flow chamber and is equipped with a water nozzle, with the two water nozzles being staggered vertically.

7. The charging liquid-cooled terminal structure according to claim 6, characterized in that, The water tap is a variable diameter pagoda-shaped water tap, which is connected to the water pipe by a pipe clamp to achieve tight clamping.

8. The charging liquid-cooled terminal structure according to claim 4, characterized in that, The front end face of the cooling box is provided with a terminal limiting post located outside the second O-shaped cavity, which is used to radially limit the front end of the charging terminal.

9. A charging liquid-cooled terminal structure according to any one of claims 1-8, characterized in that, The charging terminal includes, in sequence, a terminal conductive part, an elastic retaining ring mounting part, a first O-ring mounting part, a ceramic spraying part, a second O-ring mounting part, a terminal limiting part, and a wire welding part. The first and second O-ring mounting parts are each fitted with an O-ring. When the charging terminal is installed inside the cooling box, the first and second O-ring mounting parts are located within the first and second O-ring cavities of the cooling box, respectively, to achieve a sealed fit. The elastic retaining ring mounting part is used to install an elastic retaining ring, which is embedded in the limiting cavity outside the first O-ring cavity.

10. The charging liquid-cooled terminal structure according to claim 9, characterized in that, The terminal limiting point is arc-shaped and perpendicular to the wire welding point, and is used to abut against the front end face of the cooling box to achieve axial limiting; And / or the surface of the mounting area of ​​the elastic retaining ring is coated with an alumina ceramic coating.

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