European standard liquid cooling high-power charging gun

Abstract

The utility model discloses a European standard liquid cooling high-power charging gun which is ideal in cooling effect, high in modularization degree, convenient to disassemble and assemble and small in size. According to the technical scheme, the cooling gun comprises a gun handle and a gun head assembly arranged at the front end of the gun handle, the gun head assembly comprises a gun head, a DC terminal, a PE terminal, an auxiliary terminal and a lining, the DC terminal, the PE terminal and the auxiliary terminal are arranged in the gun head, the lining is arranged at the rear end of the gun head, and two cooling cavities which are not communicated with each other are formed in the lower end of the lining. The DC terminal is inserted into the front end of the cooling cavity and is fixed through a clamp spring, the rear end of the DC terminal is provided with a welding part extending into the cooling cavity, the welding part is provided with an upper welding surface and a lower welding surface, the rear end of the cooling cavity is provided with water nozzles, and each water nozzle is provided with a water inlet nozzle joint and a water outlet nozzle joint.

Description

Technical Field

[0001] The utility model belongs to the field of new energy vehicles, and particularly relates to a charging gun for new energy vehicles. Background Art

[0002] With the rapid development of the electric vehicle industry, the corresponding electric vehicle charging and discharging equipment has also made great progress. However, compared with traditional vehicles, there are still deficiencies. For example, according to the existing actual situation, the fastest DC fast charging in the field of vehicle charging still takes an average of 1 hour to fully charge, which is still a long way to go compared with refueling which only takes 5 - 10 minutes to fill up. Therefore, to solve the above problems, charging equipment manufacturers continuously increase the charging power to achieve fast charging and reduce the charging duration. However, high-current charging will inevitably cause a large amount of heat to be generated in the charging terminal components. As the terminal temperature continues to rise, the charging process will trigger temperature protection and lead to inability to charge, and in severe cases, combustion will occur. Therefore, it is particularly important to reduce the temperature of the terminal components during high-power charging. The disadvantages of traditional European standard new energy vehicle charging guns are as follows: 1. During high-power charging, the current-carrying temperature rise at the crimping part of the DC terminal is relatively high; 2. The degree of modularization is low, the disassembly and assembly are troublesome, and the volume is large. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a European standard liquid-cooled high-power charging gun with ideal cooling effect, high degree of modularization, convenient disassembly and assembly, and small volume.

[0004] To solve the above problems, the technical solution adopted by the utility model includes: a gun handle and a gun head assembly arranged at the front end of the gun handle. The gun head assembly includes a gun head, a DC terminal, a PE terminal, and an auxiliary terminal arranged in the gun head, and a bushing arranged at the rear end of the gun head. The characteristics are as follows: two non-communication cooling cavities are arranged at the lower end of the bushing. The DC terminal is inserted into the front end of the cooling cavity and fixed by a circlip. A welding part extending into the cooling cavity is arranged at the rear end of the DC terminal. The welding part is provided with an upper welding surface and a lower welding surface. A water nozzle is arranged at the rear end of the cooling cavity, and each water nozzle is provided with a water inlet nozzle joint and a water outlet nozzle joint.

[0005] The European standard liquid-cooled high-power charging gun is characterized in that: the rear end of the auxiliary terminal is connected to a PCB board. The PCB board is clamped in a card slot at the top of the bushing through a clamping part at the rear end. The PE terminal is clamped in a U-shaped rib in the bushing through an annular groove at the rear end.

[0006] The European standard liquid-cooled high-power charging gun is characterized in that: a positioning groove is arranged above the cooling cavity of the bushing, and the upper welding surface is embedded in the positioning groove.

[0007] The European standard liquid-cooled high-power charging gun described above is characterized in that: a partition is provided between the bushings corresponding to the water nozzles.

[0008] The European standard liquid-cooled high-power charging gun described above is characterized in that: temperature sensors are installed on both sides of the bushing through installation grooves, and the tops of the temperature sensors are attached to the welding part.

[0009] The European standard liquid-cooled high-power charging gun described above is characterized in that: the gun head is connected to the gun handle by screws in a set of screw holes on the end face, and a waterproof plug is provided in the screw holes.

[0010] The European standard liquid-cooled high-power charging gun described above is characterized in that: a first sealing ring that is hermetically matched with the cooling cavity is provided at the front end of the water nozzle.

[0011] The European standard liquid-cooled high-power charging gun described above is characterized in that: a gasket, a wire sealing body and a wire clamping mechanism are successively provided at the tail of the gun handle. The wire clamping mechanism includes a clamping jaw and a clamping sleeve sleeved outside the clamping jaw. The rear end of the clamping sleeve is provided with a sheath that is connected to the gun handle through a groove.

[0012] The European standard liquid-cooled high-power charging gun described above is characterized in that: a second sealing ring that is hermetically matched with the gun handle is provided on the gun head.

[0013] The advantages of the European standard liquid-cooled high-power charging gun of the present utility model are as follows:

[0014] 1. The tail of the DC terminal is widened, so that there are an upper welding surface and a lower welding surface, and it is ultrasonically welded with two wires, maximizing the contact area between the DC terminal and the coolant, so that the cooling liquid can quickly take away the high temperature on the terminal surface, thereby reducing the DC temperature rise of the terminal;

[0015] 2. The double-in and double-out coolant circulation method is adopted, increasing the cooling efficiency and achieving a better cooling effect;

[0016] 3. The overall modular installation is easy to assemble and convenient for subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below with reference to the drawings in the specification.

[0018] Figure 1 is a schematic structural diagram of the European standard liquid-cooled high-power charging gun of the present utility model;

[0019] Figure 2 is an exploded view of the European standard liquid-cooled high-power charging gun of the present utility model;

[0020] Figure 3 is an installation schematic diagram between the bushing and the terminal of the present utility model;

[0021] Figure 4 is a schematic structural view of the bushing of the present utility model;

[0022] Figure 5 is a schematic structural view of the DC terminal of the present utility model;

[0023] Figure 6 is a schematic structural view of the water nozzle of the present utility model;

[0024] Figure 7 is a schematic structural view of the PCB board of the present utility model;

[0025] Figure 8 is a schematic structural view of the PE terminal of the present utility model;

[0026] Figure 9 is a schematic structural view of the jacket and the sheath of the present utility model;

[0027] Figure 10 is a schematic view of the coolant circulation of the present utility model. Detailed implementation manners

[0028] Referring to Figures 1-10 as shown, the standard liquid-cooled high-power charging gun of the present utility model includes a gun handle 1 and a gun head assembly 2 provided at the front end of the gun handle 1. The gun head assembly 2 includes a gun head 3, a DC terminal 4, a PE terminal 5, and an auxiliary terminal 6 provided in the gun head 3, and a bushing 7 provided at the rear end of the gun head 3. The bushing 7 is fixed to the rear end of the gun head 3 by screws. The DC terminal 4 includes two wires of DC+ and CD-, and the DC terminal 4 includes two wires of CP (control signal positive electrode) and PP (control signal negative electrode). Two mutually non-communication cooling cavities 8 are provided at the lower end of the bushing 7. The DC terminal 4 is inserted into the front end of the cooling cavity 8 and fixed by a circlip 9. A welding portion 10 extending into the cooling cavity 8 is provided at the rear end of the DC terminal 4. The welding portion 10 is provided with an upper welding surface 11 and a lower welding surface 12. Two wires are welded on the upper welding surface 11 and the lower welding surface 12 by ultrasonic welding. A water nozzle 15 is provided at the rear end of the cooling cavity 8. The water nozzle 15 is fixed to the rear end of the bushing 7 by installing screws on its flange 38. Each water nozzle 15 is provided with a water inlet nozzle joint 16 and a water outlet nozzle joint 17, and the cooling pipes are respectively connected through the water inlet nozzle joint 16 and the water outlet nozzle joint 17.

[0029] Preferably, the rear end of the auxiliary terminal 6 is connected to the PCB board 18. The PCB board 18 is snap-fitted into the card slot 20 at the top of the bushing 7 through the snap-fitting portion 19 at the rear end. The PE terminal 5 is snap-fitted into the U-shaped rib 22 inside the bushing 7 through the annular groove 21 at the rear end. With the above structure, during assembly, the auxiliary terminal 6 and the PE terminal 5 can be first integrated onto the bushing 7 to form a modular structure, and finally the whole is installed into the gun head 3, which is convenient for assembly and subsequent maintenance.

[0030] Preferably, a positioning groove 23 is provided above the cooling cavity 8 of the bushing 7, and the upper welding surface 11 is embedded in the positioning groove 23 to improve the stability of the installation of the DC terminal 4.

[0031] Preferably, a partition 24 is provided between the bushings 7 corresponding to the water nozzles 15 for isolating adjacent cables, thereby improving safety.

[0032] Preferably, temperature sensors 26 are installed on both sides of the bushing 7 through installation grooves 25, and the tops of the temperature sensors 26 are attached to the welding portion 10 for convenient installation of the temperature sensors 26. The temperature sensors 26 are used to detect the temperature rise of the DC terminal 4.

[0033] Preferably, the gun head 3 is connected to the gun handle 1 through screws 28 in a set of screw holes 27 on the end face, and a waterproof plug 29 is provided in the screw holes 27. By directly installing the screws 28 in the screw holes 27 on the end face of the gun head 3 to connect with the gun handle 1, the installation is more convenient, and at the same time, the waterproof plug 29 can also play a waterproof role.

[0034] Preferably, a first sealing ring 30 for sealing cooperation with the cooling cavity 8 is provided at the front end of the water nozzle 15, and a second sealing ring 35 for sealing cooperation with the gun handle 1 is provided on the gun head 3. To improve the overall sealing performance of the charging gun.

[0035] Preferably, a gasket 37, a wire sealing body 31 and a wire clamping mechanism are successively provided at the tail of the gun handle 1. The wire clamping mechanism includes a clamping jaw 32 and a clamping sleeve 33 sleeved outside the clamping jaw 32. The rear end of the clamping sleeve 33 is provided with a sheath 34 connected to the gun handle 1 through a groove 36. The sheath 34 is composed of an upper sheath and a lower sheath. After the studs 40 of the upper sheath and the lower sheath are inserted into the groove 36, they are fixed by screwing in screws. When the clamping sleeve 33 is tightened with the gun handle 1 through a screw rod, the converging groove 39 with an inclined surface on its inner wall forces the clamping jaw 32 to converge towards the center to play a role in fixing the wire, and the combination of the gasket 37 and the sheath 34 can play a better role in protecting the wire and sealing.

[0036] As mentioned above, there is no restriction in any form on the present utility model. Although the present utility model has been disclosed above with a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art, within the scope of the technical solution of the present invention, can make some changes or modifications to the above-disclosed structure and technical content to obtain equivalent embodiments of equivalent changes. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present utility model.

Claims

1. A European standard liquid-cooled high-power charging gun, comprising a gun handle (1) and a gun head assembly (2) arranged at the front end of the gun handle (1), the gun head assembly (2) comprising a gun head (3), a DC terminal (4), a PE terminal (5) and an auxiliary terminal (6) arranged in the gun head (3), and a bushing (7) arranged at the rear end of the gun head (3), characterized in that: The lower end of the bushing (7) is provided with two cooling chambers (8) which are not connected to each other. The DC terminal (4) is plugged into the front end of the cooling chamber (8) and fixed by a retaining ring (9). The rear end of the DC terminal (4) is provided with a welding portion (10) which extends into the cooling chamber (8). The welding portion (10) is provided with an upper welding surface (11) and a lower welding surface (12). The rear end of the cooling chamber (8) is provided with a water nozzle (15). Each of the water nozzles (15) is provided with a water inlet nozzle joint (16) and a water outlet nozzle joint (17).

2. The European standard liquid-cooled high-power charging gun according to claim 1, characterized in that: The auxiliary terminal (6) is connected to a PCB board (18) at a rear end, the PCB board (18) is clamped to a clamping groove (20) at the top of the bushing (7) via a clamping portion (19) at a rear end, and the PE terminal (5) is clamped to a U-shaped clamping rib (22) in the bushing (7) via a ring-shaped groove (21) at a rear end.

3. The European standard liquid-cooled high-power charging gun according to claim 1, characterized in that: A positioning groove (23) is provided above the cooling cavity (8) of the bushing (7), and the upper welding surface (11) is embedded in the positioning groove (23).

4. The European standard liquid-cooled high-power charging gun according to claim 1, characterized in that: A partition plate (24) is provided between the bushing (7) and the water nozzle (15).

5. The European standard liquid-cooled high-power charging gun according to claim 1, characterized in that: Temperature sensors (26) are installed on both sides of the bushing (7) through installation grooves (25), and the top of the temperature sensor (26) is attached to the welding portion (10).

6. The European standard liquid-cooled high-power charging gun according to claim 1, characterized in that: The gun head (3) is connected to the gun handle (1) via screws (28) in a group of screw holes (27) on the end surface, and a waterproof plug (29) is provided in the screw hole (27).

7. The European standard liquid-cooled high-power charging gun according to claim 1, characterized in that: A first sealing ring (30) is provided at the front end of the water nozzle (15) and is in sealing cooperation with the cooling cavity (8).

8. The European standard liquid-cooled high-power charging gun according to claim 1, characterized in that: The rear portion of the gun handle (1) is provided with a gasket (37), a wire sealing body (31) and a wire clamp mechanism in sequence, the wire clamp mechanism comprising a clamping claw (32) and a jacket (33) sleeved outside the clamping claw (32), the jacket (33) having a sheath (34) connected to the gun handle (1) via a groove (36) at the rear end thereof.

9. The European standard liquid-cooled high-power charging gun according to claim 1, characterized in that: The gun head (3) is provided with a second sealing ring (35) which is in sealing cooperation with the gun handle (1).

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