Double-in and double-out liquid cooling charging plug

Abstract

The utility model discloses a double-in and double-out liquid cooling charging plug which is large in cooling liquid coverage, simple in structure, convenient to install and fast in cooling circulation. According to the technical scheme, the plug comprises a plug shell, a liquid-cooled insulating rubber core assembly arranged at the rear end of the plug shell, and a rubber-coated DC terminal arranged between the plug shell and the liquid-cooled insulating rubber core assembly, the liquid cooling insulation rubber core assembly is characterized in that the liquid cooling insulation rubber core assembly comprises a liquid cooling insulation rubber core, a water cooling groove sealing rubber ring, a liquid cooling insulation rubber core rear cover, a liquid inlet nozzle and a liquid outlet nozzle; the liquid-cooled insulating rubber core is provided with two axially extending cooling cavities, the rear end of the liquid-cooled insulating rubber core is provided with a sealing groove, and the two ends of each cooling cavity are provided with axially extending diversion trenches. The charging gun has the advantages that under the condition that the size standard of the space structure of the charging gun is met, the middle of the DC terminal is immersed in the cooling liquid through the rubber coating structure, the flow guide groove is formed in the cooling cavity, resistance generated when the liquid passes through is reduced, and therefore the circulation speed of the cooling liquid can be increased.

Description

Technical Field

[0001] The utility model belongs to the field of new energy vehicles, and in particular relates to a liquid-cooled charging plug. Background Art

[0002] As charging equipment manufacturers continue to increase charging power to achieve fast charging and reduce charging time, high-current charging will inevitably cause a lot of heat to be generated in the charging terminal components. As the terminal temperature continues to rise, the charging process will trigger the temperature protection and cause charging failure, and serious combustion will occur. Therefore, how to reduce the temperature of the terminal components during high-power charging is particularly important. In order to quickly take away the heat generated by the charging cable, the mode of using coolant to cool the charging cable has begun to be adopted. The traditional liquid-cooled charging plug structure includes: a plug housing, a liquid-cooled insulating rubber core assembly located at the rear end of the plug housing, and a DC terminal located between the plug housing and the liquid-cooled insulating rubber core assembly. The main disadvantages of the traditional liquid-cooled charging plug structure are: 1. Insufficient coverage of the coolant, resulting in a high temperature of the local DC terminal; 2. The assembly structure is complex, and the cooling structure is difficult to install and disassemble; 3. The cooling effect is affected by the slow cooling cycle. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a double-inlet and double-outlet liquid-cooled charging plug with large coolant coverage, simple structure, convenient installation and fast cooling cycle.

[0004] In order to solve the above problems, the technical solution adopted by the utility model includes: a plug housing, a liquid-cooled insulating rubber core assembly arranged at the rear end of the plug housing, and a rubber-coated DC terminal arranged between the plug housing and the liquid-cooled insulating rubber core assembly, characterized in that: the liquid-cooled insulating rubber core assembly includes a liquid-cooled insulating rubber core, a water-cooling groove sealing rubber ring, a liquid-cooled insulating rubber core rear cover, a liquid inlet nozzle and a liquid outlet nozzle; the liquid-cooled insulating rubber core is provided with two axially extending cooling cavities, and a sealing groove is provided at the rear end, and axially extending guide grooves are provided at both ends of the cooling cavity; the water-cooling groove sealing rubber ring is provided at the liquid-cooled insulating rubber core The liquid-cooled insulating rubber core rear cover is covered on the rear end of the liquid-cooled insulating rubber core and applies pressure to the water-cooled groove sealing rubber ring; the liquid inlet nozzle is installed on the upper end of the liquid-cooled insulating rubber core rear cover and is connected to the guide groove at the upper end; the liquid outlet nozzle is installed on the lower end of the liquid-cooled insulating rubber core rear cover and is connected to the guide groove at the lower end; the rear end of the rubber-coated DC terminal is placed in the cooling cavity of the liquid-cooled insulating rubber core, and the insertion end is provided with a rubber coating layer, the front end of the rubber coating layer is provided with a first sealing ring that is sealed with the liquid-cooled insulating rubber core, and the rear end is sealed with the water-cooled groove sealing rubber ring.

[0005] The dual-inlet and dual-outlet liquid-cooled charging plug is characterized in that the rear end of the rubber coating layer is sealed with the water-cooling groove sealing rubber ring through a convex ring, and the convex ring is provided with an anti-foolproof protrusion, and the rear cover of the liquid-cooled insulating rubber core is provided with an anti-foolproof groove adapted to the anti-foolproof protrusion.

[0006] The dual-inlet and dual-outlet liquid-cooled charging plug is characterized in that a positioning tube embedded in the guide groove is provided on the rear cover of the liquid-cooled insulating rubber core.

[0007] The dual-input and dual-output liquid-cooled charging plug is characterized in that the rear cover of the liquid-cooled insulating rubber core is connected to the hanging platform on the plug housing through buckles at both ends.

[0008] The dual-inlet and dual-outlet liquid-cooled charging plug is characterized in that the cross-section of the guide groove is U-shaped and an inclined surface is provided at the front end.

[0009] The dual-input and dual-output liquid-cooled charging plug is characterized in that a second sealing ring that seals with the plug housing is provided at the front end of the rubber-coated DC terminal.

[0010] The double-inlet and double-outlet liquid-cooled charging plug is characterized in that a third sealing ring is provided between the liquid inlet nozzle, the liquid outlet nozzle and the liquid-cooled insulating rubber core.

[0011] The dual-input and dual-output liquid-cooled charging plug is characterized in that a PCB board mounting portion is provided at the front end of the liquid-cooled insulating rubber core, and a PCB board positioning column is provided on the PCB board mounting portion.

[0012] The main advantages of the dual-inlet and dual-outlet liquid-cooled charging plug of the utility model are as follows: 1. While meeting the spatial structure size standards of the charging gun, the middle part of the DC terminal is immersed in the coolant using a rubber-coated structure, and a guide groove is arranged inside the cooling chamber to reduce the resistance when the liquid passes through, thereby increasing the coolant circulation speed; 2. The overall structure is installed in a modular manner and can be assembled by one person, which is convenient for maintenance and simple for subsequent maintenance.

[0013] The utility model is further described below in conjunction with the accompanying drawings of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an exploded view of the double-input and double-output liquid-cooled charging plug of the utility model;

[0015] Figure 2 It is a cross-sectional view of the double-inlet and double-outlet liquid-cooled charging plug of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the liquid-cooled insulating rubber core of the utility model;

[0017] Figure 4It is a schematic diagram of the coolant circulation of the charging plug of the utility model. DETAILED DESCRIPTION

[0018] Reference Figure 1-4 As shown, the double-inlet and double-outlet liquid-cooled charging plug of the utility model comprises a plug housing 1, a liquid-cooled insulating rubber core assembly 2 arranged at the rear end of the plug housing 1, and a rubber-coated DC terminal 3 arranged between the plug housing 1 and the liquid-cooled insulating rubber core assembly 2. The liquid-cooled insulating rubber core assembly 2 comprises a liquid-cooled insulating rubber core 4, a water-cooled groove sealing rubber ring 5, a liquid-cooled insulating rubber core rear cover 6, a liquid inlet nozzle 7, and a liquid outlet nozzle 8. The liquid-cooled insulating rubber core 4 is provided with two axially extending cooling chambers 9, and a sealing groove 10 is provided at the rear end of the liquid-cooled insulating rubber core 4. Both ends of the cooling chamber 9 are provided with guide grooves 11 extending axially and communicating with the cooling chamber 9. The water-cooled groove sealing rubber ring 5 is arranged in the sealing groove 10 of the liquid-cooled insulating rubber core 4. The liquid-cooled insulating rubber core rear cover 6 covers the rear end of the liquid-cooled insulating rubber core 4, and the liquid-cooled insulating rubber core rear cover applies pressure to the water-cooled groove sealing rubber ring 5. The liquid inlet nozzle 7 is installed at the upper end of the liquid-cooled insulating rubber core rear cover 6 and is fastened by screws 25. The liquid inlet nozzle 7 is connected to the guide groove 11 at the upper end. The liquid outlet nozzle 8 is installed at the lower end of the liquid-cooled insulating rubber core rear cover 6 and is also fastened by a screw 25. The liquid outlet nozzle 8 is connected to the guide groove 11 at the lower end. The rear end of the rubber-coated DC terminal 3 is placed in the cooling cavity 9 of the liquid-cooled insulating rubber core 4, and the insertion end is provided with a rubber coating layer 12, and the rubber-coated DC terminal 3 is fixed to the liquid-cooled insulating rubber core 4 by a C-shaped retaining ring 26. The front end of the rubber coating layer 12 is provided with a first sealing ring 13 that is sealed with the liquid-cooled insulating rubber core 4, and the rear end of the rubber coating layer 12 is sealed with the water-cooled groove sealing rubber ring 5.

[0019] Preferably, the rear end of the rubber coating layer 12 is sealed with the water cooling groove sealing rubber ring 5 through a convex ring 14, and the convex ring 14 is provided with a foolproof protrusion 15, and the liquid cooling insulation rubber core rear cover 6 is provided with a foolproof groove 16 adapted to the foolproof protrusion 15, so as to prevent the rubber coated DC terminal 3 from being installed upside down and rotating.

[0020] Preferably, the liquid-cooled insulating rubber core rear cover 6 is provided with a positioning tube 17 embedded in the guide groove 11 to position the liquid-cooled insulating rubber core rear cover 6 so that the coolant enters the guide groove 11 more accurately.

[0021] Preferably, the liquid-cooled insulating rubber core rear cover 6 is connected to the hanging platform 19 on the plug housing through buckles 18 at both ends to achieve a quick connection between the two.

[0022] Preferably, the cross section of the guide groove 11 is U-shaped, and an inclined surface 20 is provided at the front end to further improve the circulation speed and uniformity of the coolant.

[0023] Preferably, the front end of the rubber-coated DC terminal 3 is provided with a second sealing ring 21 that is sealed with the plug housing 1. A third sealing ring 22 is provided between the liquid inlet nozzle 7, the liquid outlet nozzle 8 and the liquid-cooled insulating rubber core 4 to improve the overall waterproof performance of the product.

[0024] Preferably, a PCB board mounting portion 23 is provided at the front end of the liquid-cooling insulating rubber core 4, and a PCB board positioning column 24 is provided on the PCB board mounting portion 23, so as to facilitate the installation and fixation of the PCB board.

[0025] The above does not impose any formal limitation on the utility model. Although the utility model has been disclosed as a preferred implementation case as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to the equivalent implementation cases of equivalent changes by using the structure and technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above implementation cases based on the technical essence of the utility model without departing from the content of the technical solution of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. A dual-input and dual-output liquid-cooled charging plug, comprising a plug housing (1), a liquid-cooled insulating rubber core assembly (2) arranged at the rear end of the plug housing (1), and a rubber-coated DC terminal (3) arranged between the plug housing (1) and the liquid-cooled insulating rubber core assembly (2), characterized in that: The liquid-cooled insulating rubber core assembly (2) comprises a liquid-cooled insulating rubber core (4), a water-cooled groove sealing rubber ring (5), a liquid-cooled insulating rubber core rear cover (6), a liquid inlet nozzle (7) and a liquid outlet nozzle (8); the liquid-cooled insulating rubber core (4) is provided with two axially extending cooling chambers (9), and a sealing groove (10) is provided at the rear end, and axially extending guide grooves (11) are provided at both ends of the cooling chamber (9); the water-cooled groove sealing rubber ring (5) is arranged in the sealing groove (10) of the liquid-cooled insulating rubber core (4); the liquid-cooled insulating rubber core rear cover (6) covers the rear end of the liquid-cooled insulating rubber core (4) and applies pressure to the water-cooled groove sealing rubber ring (5). The liquid inlet nozzle (7) is installed at the upper end of the liquid-cooled insulating rubber core rear cover (6) and is connected to the guide groove (11) at the upper end; the liquid outlet nozzle (8) is installed at the lower end of the liquid-cooled insulating rubber core rear cover (6) and is connected to the guide groove (11) at the lower end; the rear end of the rubber-coated DC terminal (3) is placed in the cooling cavity (9) of the liquid-cooled insulating rubber core (4), and the rear end of the rubber-coated DC terminal (3) is provided with a rubber coating layer (12), the front end of the rubber coating layer (12) is provided with a first sealing ring (13) that is sealed with the liquid-cooled insulating rubber core (4), and the rear end is sealed with the water-cooled groove sealing rubber ring (5).

2. The double-input and double-output liquid-cooled charging plug according to claim 1, characterized in that: The rear end of the rubber coating (12) is sealed with the water cooling groove sealing rubber ring (5) via a convex ring (14), and the convex ring (14) is provided with an anti-mistake protrusion (15), and the liquid cooling insulation rubber core rear cover (6) is provided with an anti-mistake groove (16) adapted to the anti-mistake protrusion (15).

3. The double-input and double-output liquid-cooled charging plug according to claim 1, characterized in that: The liquid-cooling insulating rubber core rear cover (6) is provided with a positioning tube (17) embedded in the guide groove (11).

4. The double-input and double-output liquid-cooled charging plug according to claim 1, characterized in that: The liquid-cooled insulating rubber core rear cover (6) is connected to the hanging platform (19) on the plug housing (1) via buckles (18) at both ends.

5. The double-input and double-output liquid-cooled charging plug according to claim 1, characterized in that: The guide groove (11) has a U-shaped cross section and an inclined surface (20) is provided at the front end.

6. The double-input and double-output liquid-cooled charging plug according to claim 1, characterized in that: A second sealing ring (21) which seals with the plug housing (1) is provided at the front end of the rubber-coated DC terminal (3).

7. The dual-input and dual-output liquid-cooled charging plug according to claim 1, characterized in that: A third sealing ring (22) is provided between the liquid inlet nozzle (7), the liquid outlet nozzle (8) and the liquid-cooling insulating rubber core (4).

8. The dual-input and dual-output liquid-cooled charging plug according to claim 1, characterized in that: A PCB board mounting portion (23) is provided at the front end of the liquid-cooling insulating rubber core (4), and a PCB board positioning column (24) is provided on the PCB board mounting portion (23).

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