New energy automobile large-current charging terminal and charging device

Abstract

The utility model relates to the technical field of charging terminals, in particular to a large-current charging terminal for a new energy automobile and a charging device. The large-current charging terminal of the new energy automobile comprises a male head and a female head, and a first conductive part, a second conductive part, a third conductive part and a fourth conductive part are sequentially formed on the male head; the second hollow structure longitudinally penetrates through the third conductive part and the fourth conductive part; a first air hole is formed in the third conductive part and is connected with the second hollow structure; a fifth conductive part and a sixth conductive part are sequentially formed on the female head; a third hollow structure and a positioning column are arranged in the sixth conductive part; the sixth conductive part is provided with an air channel which is communicated with the second hollow structure and the third hollow structure; the sixth conductive part is provided with a second air hole. When the air channel exhausts air, the air enters the third hollow structure and the second hollow structure from the second air hole and then is exhausted from the air channel, the air cooling mode is safer, meanwhile, the structure is simpler, and the manufacturing cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of charging terminals, in particular to a large-current charging terminal and a charging device for new energy vehicles. Background Art

[0002] A charging socket is installed on a new energy vehicle. When the existing charging socket is connected to a power supply end for charging, the charging gun head of the power supply end needs to be inserted into the charging interface of the charging socket of the new energy vehicle. During charging, the charging terminal will generate relatively large heat, especially in the case of fast charging, the heat generated by the terminal is relatively large. To ensure safety, some charging guns use a liquid cooling method to cool the charging terminal. However, the liquid cooling method has a relatively complex structure and high safety requirements, so the cost is relatively high.

[0003] For example, the charging terminal cooling box and charging socket disclosed in Chinese Patent Application No.: CN202323323509.3. Specifically disclosed is "a charging terminal cooling box. The charging terminal cooling box includes: a box body having an inner cavity for accommodating a coolant and a top opening communicating with the inner cavity; and a top cover installed on the top of the box body for covering the top opening of the box body. The top cover is used for thermally contacting the welding end of the charging terminal fixed thereon to transfer the heat of the charging terminal to the coolant in the box body; the box body has a cooling core pipe joint and a liquid inlet pipe joint communicating with its inner cavity. The liquid inlet pipe joint is used for connecting with a liquid inlet pipe, and the cooling core pipe joint is used for connecting with the cooling core pipe of the charging cable, so that the coolant can flow through the charging terminal cooling box and the cooling core pipe of the charging cable to cool the charging terminal and the charging cable". The coolant cools the charging terminal and the charging cable. This liquid cooling method has a relatively complex structure, high safety requirements, and high costs. Summary of the Utility Model

[0004] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide a large-current charging terminal for new energy vehicles, which uses air cooling to cool the terminal, has a simple structure, high safety, and low cost, thereby overcoming the deficiencies of the existing technology.

[0005] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0006] The present application provides a large-current charging terminal for new energy vehicles, including a male head and a female head. The male head is sequentially formed with a first conductive part, a second conductive part, a third conductive part, and a fourth conductive part; the first conductive part has a first hollow structure inside, and a first wire is inserted into the first hollow structure; a second hollow structure longitudinally penetrates the third conductive part and the fourth conductive part, and a first air hole is provided on the third conductive part and is connected to the second hollow structure;

[0007] A fifth conductive part and a sixth conductive part are sequentially formed on the female head; the second wire is fixed to the fifth conductive part; the interior of the sixth conductive part has a third hollow structure and a positioning post; a first conductive crown spring and a second conductive crown spring are arranged in the third hollow structure; the sixth conductive part is provided with an air passage, and the air passage is communicated with the second hollow structure and the third hollow structure; the sixth conductive part is provided with a second air hole;

[0008] The male head is inserted into the female head. The first conductive crown spring wraps the second conductive part, the second conductive crown spring wraps the third conductive part, and the positioning post is inserted into the second hollow structure.

[0009] Preferably, a first limiting ring is arranged between the first conductive part and the second conductive part, a second limiting ring is arranged between the second conductive part and the third conductive part, the included angle A between the left and right inclined surfaces of the first limiting ring, and the included angle B between the left and right inclined surfaces of the second limiting ring are between 55 - 65°.

[0010] Preferably, the included angle C between the bottom of the second limiting ring and the vertical plane is between 80 - 90°.

[0011] Preferably, a third limiting ring is arranged between the first conductive part and the second conductive part, and the third limiting ring is blocked by the opening of the sixth conductive part; a fourth limiting ring is arranged between the fifth conductive part and the sixth conductive part.

[0012] Preferably, a fourth limiting ring is arranged between the fifth conductive part and the sixth conductive part

[0013] Preferably, a gap is left between the reed pieces of the first conductive crown spring and the second conductive crown spring, and gas can enter the first hollow structure and the second hollow structure from the second air hole and be discharged from the air passage.

[0014] Preferably, a first air nozzle is arranged at the exhaust port of the air passage, and the first air nozzle is connected to an air pump through a pipeline.

[0015] Preferably, the air passage includes a main air passage and several branch air passages, the branch air passages are communicated with the main air passage, and the branch air passages are arranged on both the third hollow structure and the positioning post.

[0016] A charging device includes the large - current charging terminal for new - energy vehicles, a female housing, and a male housing described above; the female housing is detachably buckled on the male housing; a first mounting seat is arranged on the female housing, the first mounting seat has several first mounting grooves, and the female head is inserted into the first mounting grooves; a second mounting seat is arranged on the male housing, the second mounting seat has several second mounting grooves, and the male head is inserted into the second mounting grooves.

[0017] Preferably, a sealing ring is arranged on the inner wall of the opening of the female housing, and the outer wall of the male housing can press the sealing ring.

[0018] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that the male head is inserted into the female head, and the airway is connected with the second hollow structure and the third hollow structure. When the airway is evacuated, the gas will enter the third hollow structure from the second air hole, and at the same time, the gas will enter the second hollow structure through the first air hole, and then the gas will be discharged from the airway. This air cooling method is safer and has a simpler structure, which is conducive to reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a female connector according to the first embodiment of the present utility model.

[0020] Figure 2 This is the first embodiment of the utility model Figure 1 Schematic cross-section view.

[0021] Figure 3 It is a schematic diagram of the assembly of the male and female connectors of the first embodiment of the utility model.

[0022] Figure 4 It is a cross-sectional schematic diagram of the assembly of the male and female connectors of the first embodiment of the utility model.

[0023] Figure 5 It is a schematic side view of a portion of the charging device of the second embodiment of the present utility model.

[0024] Figure 6 It is a top view schematic diagram of a portion of the charging device of the second embodiment of the present utility model.

[0025] Figure 7 It is a schematic diagram of the closed state of the female shell and the male shell of the second embodiment of the utility model.

[0026] Description of the accompanying drawings:

[0027] 10. Male connector; 11. First conductive part; 12. First hollow structure; 13. First wire; 110. Second conductive part; 111. Third conductive part; 112. First air hole; 113. Fourth conductive part; 114. First limiting ring; 115. Second limiting ring; 116. Second hollow structure; 118. Third limiting ring; 20. Female connector; 21. Fifth conductive part; 22. Second conductive part; 210. Sixth conductive part; 211. Third hollow structure; 212. Positioning column; 213. First conductive crown spring; 214. Second conductive crown spring; 215. Main air passage; 216. Branch air passage; 217. First air nozzle; 218. Second air hole; 219. Fourth limiting ring; 30. Female shell; 31. First mounting seat; 32. Sealing ring; 33. Male shell; 34. Second mounting seat. DETAILED DESCRIPTION

[0028] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, detail the specific implementation manners, structures, features, and effects of the present utility model as follows.

[0029] Embodiment 1

[0030] Please refer to Figures 1 to 4 as shown, which shows the specific structure of the preferred embodiment of the present utility model, and is a large-current charging terminal for a new energy vehicle.

[0031] Among them, the male head is inserted into the female head 20, and the air duct is connected to the second hollow structure 116 and the third hollow structure 211. When air is pumped out of the air duct, the gas will enter the third hollow structure 211 from the second air hole 218. At the same time, the gas will enter the second hollow structure 116 through the first air hole 112, and then the gas is discharged from the air duct. This air-cooling method is safer and the structure is simpler, which is beneficial to reducing the manufacturing cost.

[0032] The present application provides a high-current charging terminal for a new energy vehicle, including a male head and a female head 20. The male head is successively formed with a first conductive part 11, a second conductive part 110, a third conductive part 111, and a fourth conductive part 113. The first conductive part 11 has a first hollow structure 12 inside, and a first wire 13 is inserted into the first hollow structure 12. A second hollow structure 116 longitudinally penetrates the third conductive part 111 and the fourth conductive part 113, and a first air hole 112 is provided on the third conductive part 111 and is connected to the second hollow structure 116. The female head 20 is successively formed with a fifth conductive part 21 and a sixth conductive part 210. A second wire 22 is fixed to the fifth conductive part 21. The inside of the sixth conductive part 210 has a third hollow structure 211 and a positioning post 212. A first conductive crown spring 213 and a second conductive crown spring 214 are arranged in the third hollow structure 211. The sixth conductive part 210 is provided with an air passage, and the air passage is communicated with the second hollow structure 116 and the third hollow structure 211. The sixth conductive part 210 is provided with a second air hole 218. The male head is inserted into the female head 20. The first conductive crown spring 213 wraps the second conductive part 110, the second conductive crown spring 214 wraps the third conductive part 111, and the positioning post 212 is inserted into the second hollow structure 116. The male head and the female head 20 are made of aluminum or copper, which has good electrical conductivity. The male head and the female head 20 are made by cooperating with processes such as cold heading, drilling, cutting, and grinding. The first wire 13 is inserted into the first hollow structure 12, and then the first wire 13 is locked in the first hollow structure 12 by using a first screw. The first air hole 112 is connected to the second hollow structure 116, and gas can enter the second hollow structure 116 from the second hollow structure 116. The second wire 22 is fixed to the fifth conductive part 21 by using a second screw. The sixth conductive part 210 is provided with a plurality of second air holes 218, and gas can enter the third hollow structure 211 from the second air holes 218. There is a gap between the spring pieces of the first conductive crown spring 213 and the second conductive crown spring 214, and gas can enter the second hollow structure 116 and the third hollow structure 211 from the second air holes 218 and be discharged from the air passage. Working principle: The male head is inserted into the female head 20, and the air passage is communicated with the third hollow structure 211 and the second hollow structure 116 inside the sixth conductive part 210. An air pump evacuates the air passage, and part of the gas will enter the third hollow structure 211 from the second air holes 218 and then be discharged through the air passage. Part of the gas will enter the second hollow structure 116 from the third hollow structure 211 through the first air hole 112 and then be discharged through the branch air passage 216 on the positioning post 212. It can be seen that this air-cooling method can directly take away the heat inside the terminal, has higher safety, a simpler structure, and lower cost. The air passage can be formed by drilling. The first conductive crown spring 213 and the second conductive crown spring 214 play a role of wrapping and clamping to prevent loosening and at the same time ensure electrical conductivity.There is a gap between the reeds of the first conductive crown spring 213 and the second conductive crown spring 214, and gas can pass through the gap. Therefore, dry and low-temperature gas can also cool the first conductive crown spring 213 and the second conductive crown spring 214, and the cooling effect is better. As a preferred solution, a second air nozzle can also be provided at the position of the second air hole 218, and the second air nozzle is connected to a low-temperature dry nitrogen pump through a pipeline. This design can quickly remove the heat generated during charging, and the performance is better.

[0033] Preferably, a first limiting ring 114 is provided between the first conductive part 11 and the second conductive part 110, and a second limiting ring 115 is provided between the second conductive part 110 and the third conductive part 111. The included angle A between the left and right inclined surfaces of the first limiting ring 114 and the included angle B between the left and right inclined surfaces of the second limiting ring 115 are between 55-65°. The first limiting ring 114 and the second limiting ring 115 can play a positioning role, improve the contact tightness, and have better fit. The degrees of the included angle A and the included angle B can be any value between 55°, 66°, and 65°. The included angle A and the included angle B improve the tightness of the first limiting ring 114, the second limiting ring 115 and the inner wall of the third hollow structure 211 or the first conductive crown spring 213 and the second conductive crown spring 214.

[0034] Preferably, the included angle C between the bottom of the second limiting ring 115 and the vertical plane is between 80-90°. The included angle C can be any value among 80°, 85°, and 90°. The included angle C can make the second limiting ring 115 clamp more firmly with the first conductive crown spring 213 and / or the second conductive crown spring 214.

[0035] Preferably, a third limiting ring 118 is also provided between the first conductive part 11 and the second conductive part 110, and the third limiting ring 118 is blocked by the opening of the sixth conductive part 210; a fourth limiting ring 219 is provided between the fifth conductive part 21 and the sixth conductive part 210. The third limiting ring 118 can play a limiting role and improve the sealing degree between the male head and the female head 20. The third limiting ring 118 can play a reference role to ensure that the male head is fully inserted into the female head 20. The fourth limiting ring 219 facilitates the fixation of the female head 20.

[0036] Preferably, a first air nozzle 217 is provided at the exhaust port of the air duct, and the first air nozzle 217 is connected to an air pump through a pipeline. The air pump evacuates the air duct, and gas can enter the third hollow structure 211 from the second air hole 218. At the same time, the gas will enter the second hollow structure 116 through the first air hole 112, and then the gas is discharged from the air duct.

[0037] Preferably, the air duct includes a main air duct 215 and a plurality of branch air ducts 216. The branch air ducts 216 communicate with the main air duct 215, and the branch air ducts 216 are provided on both the third hollow structure 211 and the positioning posts 212. The branch air ducts 216 and the main air duct 215 are formed by drilling.

[0038] Embodiment 2

[0039] A charging device includes the large-current charging terminal of the new energy vehicle, a female housing 30, and a male housing 33. The female housing 30 is detachably buckled on the male housing 33. A first mounting seat 31 is provided on the female housing 30, and the first mounting seat 31 has a plurality of first mounting grooves, into which the female head 20 is inserted. A second mounting seat 34 is provided on the male housing 33, and the second mounting seat 34 has a plurality of second mounting grooves, into which the male head is inserted. A sealing ring 32 is provided on the inner wall of the opening of the female housing 30, and the outer wall of the male housing 33 can press the sealing ring 32 tightly. The male housing 33 and the female housing 30 can be buckled together, and the sealing ring 32 is provided between them. The sealing ring 32 can improve the waterproof ability and the safety during use.

[0040] In summary, the design focus of the present utility model is that the male head is inserted into the female head 20, and the air duct communicates with the second hollow structure 116 and the third hollow structure 211. When the air duct extracts air, the gas will enter the third hollow structure 211 and the second hollow structure 116 from the second air hole 218, and then the gas is discharged from the air duct. This air-cooling method is safer, and at the same time, the structure is simpler, which is beneficial to reducing the manufacturing cost.

[0041] The above is only a preferred embodiment of the present utility model, and it does not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to it as equivalent embodiments within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A large-current charging terminal for a new energy vehicle, characterized in that: It includes a male head and a female head. The following are successively formed on the male head: a first conductive part, a second conductive part, a third conductive part, and a fourth conductive part. The first conductive part has a first hollow structure inside, and a first wire is inserted into the first hollow structure. A second hollow structure longitudinally penetrates the third conductive part and the fourth conductive part, and a first air hole is provided on the third conductive part and is connected to the second hollow structure. The following are successively formed on the female head: a fifth conductive part and a sixth conductive part. A second wire is fixed to the fifth conductive part. The inside of the sixth conductive part has a third hollow structure and a positioning post. A first conductive crown spring and a second conductive crown spring are arranged in the third hollow structure. The sixth conductive part is provided with an air passage, and the air passage is connected and communicated with the second hollow structure and the third hollow structure. The sixth conductive part is provided with a second air hole. The male head is inserted into the female head. The first conductive crown spring wraps the second conductive part, the second conductive crown spring wraps the third conductive part, and the positioning post is inserted into the second hollow structure.

2. The high-current charging terminal for a new energy vehicle according to claim 1, characterized in that: A first limiting ring is arranged between the first conductive part and the second conductive part, and a second limiting ring is arranged between the second conductive part and the third conductive part. The included angle A between the left and right inclined surfaces of the first limiting ring and the included angle B between the left and right inclined surfaces of the second limiting ring are between 55° and 65°.

3. The large-current charging terminal for a new energy vehicle according to claim 2, wherein: The included angle C between the bottom of the second limiting ring and the vertical plane is between 80° and 90°.

4. The large current charging terminal of a new energy vehicle according to claim 1, characterized in that: A third limiting ring is also arranged between the first conductive part and the second conductive part, and the third limiting ring is blocked by the opening of the sixth conductive part. A fourth limiting ring is arranged between the fifth conductive part and the sixth conductive part.

5. The large-current charging terminal for a new energy vehicle according to claim 1, characterized in that: A gap is left between the spring pieces of the first conductive crown spring and the second conductive crown spring. Gas can enter the first hollow structure and the second hollow structure from the second air hole and is discharged from the air passage.

6. The large current charging terminal of a new energy vehicle according to claim 1, characterized in that: A first air nozzle is arranged at the exhaust port of the air passage, and the first air nozzle is connected to an air pump through a pipeline.

7. A large current charging terminal for a new energy vehicle according to claim 1 or 6, characterized in that: The air passage includes a main air passage and several branch air passages. The branch air passages are communicated with the main air passage, and the branch air passages are arranged on both the third hollow structure and the positioning post.

8. A charging device, characterized in that: It includes the large-current charging terminal for new energy vehicles, the female shell, and the male shell according to any one of claims 1-7. The female shell is detachably buckled on the male shell. A first mounting seat is arranged on the female shell, and the first mounting seat has several first mounting grooves, and the female head is inserted into the first mounting grooves. A second mounting seat is arranged on the male shell, and the second mounting seat has several second mounting grooves, and the male head is inserted into the second mounting grooves.

9. The charging device according to claim 8, wherein: A sealing ring is arranged on the inner wall of the opening of the female shell, and the outer wall of the male shell can press the sealing ring.

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