A DC+ and DC- liquid-cooled terminal for a super charging gun

Abstract

The present invention discloses a DC+ and DC- liquid cooling terminal for a super charging gun, including two charging terminals, a bracket and a shell, wherein the charging terminal and the wiring terminal in the shell are respectively installed with vertical sealing baffles, and the bracket is provided with a waterproof heat dissipation sleeve for the charging terminal to pass through, and the outer wall of the waterproof heat dissipation sleeve adopts a sandwich structure, and the sandwich structure is a liquid cooling channel, and a funnel-shaped water inlet is provided at the liquid cooling channel on the top surface of one end of the waterproof heat dissipation sleeve, and the water inlet is connected to the liquid cooling channel, and the side wall of the liquid cooling channel at one end away from the water inlet is connected to an infusion hose, and a communicating insulated connecting pipe is provided between the shells of the two charging terminals, and the port of the insulated connecting pipe is connected to the infusion hose. The present invention connects the DC+ and DC- terminals through the insulated connecting pipe, thereby realizing circulating liquid cooling of the DC+ and DC- terminals, so that the temperature of the charging terminal can be reduced while increasing the charging power, thereby ensuring the stability of fast charging.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging guns, and in particular relates to a DC+ and DC- liquid-cooled terminal for a super charging gun. Background Art

[0002] With the continuous promotion and application of new energy, the development of new energy electric vehicles is getting faster and faster. With the development of electric vehicles, charging piles have become one of the indispensable equipment for electric vehicles.

[0003] The current charging piles and charging guns take too long to charge electric vehicles, so we need to increase the power of the charging piles to improve the efficiency of charging. However, since high-power charging will inevitably bring high heat, we propose a liquid-cooled terminal for DC+ and DC- to ensure the heat dissipation of the charging terminal. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a DC+ and DC- liquid-cooled terminal for a super charging gun in view of the above-mentioned deficiencies in the prior art, which can form a liquid cooling cycle between DC+ and DC-, effectively reduce the temperature of the charging terminal, and thus increase the charging rate.

[0005] The technical solution adopted by the present invention is: a DC+ and DC- liquid-cooled terminal for a super charging gun, including two charging terminals, a bracket and a shell, the two charging terminals are DC+ and DC- terminals arranged in parallel, one end of the shell is the charging terminal, and the other end is the wiring terminal, the charging terminal is fixed on the bracket, the bracket is fixed in the shell, one end of the charging terminal extends into the charging end of the shell, and the other end is connected to the wiring terminal, vertical sealing baffles are respectively installed at the charging end and the wiring terminal in the shell, and a connection interface for the charging terminal to pass through is opened in the center of the sealing baffle, wherein an annular liquid inlet matching the liquid cooling cable flow channel is also opened on the sealing baffle near the wiring terminal, the The bracket is provided with a waterproof heat dissipation sleeve for the charging terminal to pass through, and the centers of both ends of the waterproof heat dissipation sleeve are provided with integrally formed threaded interfaces, which are matched with the connection interface threads. The outer wall of the waterproof heat dissipation sleeve adopts a sandwich structure, and the sandwich structure is a liquid cooling channel. A funnel-shaped water inlet is opened at the liquid cooling channel on the top surface of one end of the waterproof heat dissipation sleeve, and the water inlet is connected to the liquid cooling channel. An infusion hose is connected to the side wall of the liquid cooling channel away from the water inlet, and an insulated connecting pipe is provided between the shells of the two charging terminals, and the port of the insulated connecting pipe is connected to the infusion hose. The waterproof heat dissipation sleeve is provided with a number of spiral blades along its length direction, and the edges of the spiral blades are in close contact with the outer wall and the inner wall.

[0006] Preferably, a sealing ring is provided between the threaded interface and the connecting interface.

[0007] Preferably, a plurality of heat dissipation fins are evenly arranged on the insulating connecting pipe along its length direction.

[0008] Preferably, heat dissipation nylon is filled between the waterproof heat dissipation sleeve and the charging terminal.

[0009] The beneficial effects of the present invention are:

[0010] (1) A closed cavity is formed in the housing by two sealing baffles, so that the liquid cooling medium flowing out of the liquid cooling cable can be collected, thereby realizing liquid cooling of the charging terminal;

[0011] (2) The liquid cooling medium enters the housing from the connection terminal and fills the housing. Due to the spiral blades arranged in the housing, the liquid cooling medium spirally flows from the connection terminal to the charging terminal. At the same time, the water inlet of the liquid cooling channel of the waterproof heat dissipation sleeve is located at the charging terminal, and the liquid infusion hose is located at the connection terminal, so that the liquid cooling medium entering the liquid cooling channel flows from the charging terminal to the connection terminal, thereby making the liquid cooling medium relatively flowable, taking away more heat during the flow process, and making the liquid cooling effect better;

[0012] (3) An insulating connecting pipe is provided to connect the DC+ and DC- terminals, so that after entering the DC+ terminal from the DC+ cable, it enters the DC- terminal through the insulating connecting pipe and then flows back from the DC- cable, thereby forming circulating liquid cooling;

[0013] (4) The insulating connecting pipe is provided with heat dissipation fins, which can assist in dissipating the heat of the liquid cooling medium, thereby reducing the temperature of the liquid cooling medium when it enters the DC-terminal, thereby better liquid cooling the DC-terminal.

[0014] The present invention connects the DC+ and DC- terminals through an insulating connecting pipe, thereby realizing circulating liquid cooling of the DC+ and DC- terminals, thereby reducing the temperature of the charging terminals while increasing the charging power, thereby ensuring the stability of fast charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a cross-sectional view of the charging terminal of the present invention.

[0017] In the figure: 1. Charging terminal; 2. Bracket; 3. Housing; 4. Sealing baffle; 5. Connection interface; 6. Annular liquid inlet; 7. Waterproof heat dissipation sleeve; 8. Threaded interface; 9. Liquid cooling channel; 10. Water inlet; 11. Infusion hose; 12. Insulated connecting pipe; 13. Spiral blades; 14. Heat dissipation fins. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Example

[0020] like Figure 1 and Figure 2 As shown, the DC+ and DC- liquid-cooled terminals for the super charging gun provided in this embodiment include two charging terminals 1, a bracket 2 and a shell 3. The two charging terminals 1 are DC+ and DC- terminals arranged in parallel. One end of the shell 3 is a charging terminal, and the other end is a wiring terminal. The charging terminal 1 is fixed on the bracket 2, and the bracket 2 is fixed in the shell 3, that is, the DC+ terminal is fixed in one shell 3 through the bracket 2, and the DC- terminal is fixed in another shell 3 through the bracket 2, and the two shells 3 are arranged in parallel;

[0021] After the charging terminal 1 is fixed by the bracket 2, one end thereof extends into the charging end of the housing 3, and the other end is connected to the wiring terminal. Vertical sealing baffles 4 are respectively installed at the charging end and the wiring terminal in the housing 3. A connection interface 5 for the charging terminal 1 to pass through is opened in the center of the sealing baffle 4. The charging terminal 1 is extended in this embodiment, which is 58 mm longer than the traditional charging terminal 1, so as to ensure that one end of the charging terminal 1 is located in the charging gun head of the housing 3 after passing through the sealing single plate, and the other end passes through the sealing baffle 4 to communicate with the liquid cooling cable, that is, the wire core of the liquid cooling cable is connected to the charging terminal 1, and the medium flow channel of the liquid cooling cable is connected to the annular liquid inlet 6 on the sealing baffle 4, so that the liquid cooling medium in the liquid cooling cable flows into the housing 3 through the annular liquid inlet 6, and the cavity between the two sealing baffles 4 in the housing 3 is filled with liquid. Liquid cooling medium, a waterproof heat dissipation sleeve 7 is arranged between the two sealing baffles 4, and the waterproof heat dissipation sleeve 7 is sleeved on the charging terminal 1, so as to realize heat exchange between the charging terminal 1 and the liquid cooling medium, and the centers of both ends of the waterproof heat dissipation sleeve 7 are provided with an integrally formed threaded interface 8, and the threaded interface 8 is threadedly matched with the connecting interface 5, and the threaded connection of the threaded interface 8 and the connecting interface 5 is made so that the waterproof heat dissipation sleeve 7 is connected to the sealing baffle 4, and a sealing ring is sleeved between the threaded interface 8 and the connecting interface 5 to ensure that the inside of the waterproof heat dissipation sleeve 7 is connected with the charging terminal and the wiring terminal in the shell 3. After the waterproof heat dissipation sleeve 7 is connected to the sealing baffle 4, a closed space is formed inside it to ensure that the liquid cooling medium will not penetrate into the waterproof heat dissipation sleeve 7, the charging terminal of the shell 3 and the wiring terminal of the shell 3, thereby ensuring the normal operation of the charging terminal 1;

[0022] The waterproof heat dissipation sleeve 7 is provided with several spiral blades 13 coaxially arranged therewith along its length direction. The edges of the spiral blades 13 are in close contact with the inner wall of the outer shell 3. After the liquid cooling medium is filled in the outer shell 3 and flows into the liquid cooling medium through the annular liquid inlet 6, the liquid cooling medium will flow in a spiral along the several spiral blades 13, and the flow direction is from the wiring terminal to the charging terminal. At this time, the liquid cooling medium flows in a spiral around the outer wall of the waterproof heat dissipation sleeve 7;

[0023] At the same time, the outer wall of the waterproof heat dissipation sleeve 7 adopts a sandwich structure, and the sandwich structure is a liquid cooling channel 9. A funnel-shaped water inlet 10 is opened at the liquid cooling channel 9 on the top surface of one end of the waterproof heat dissipation sleeve 7, and the water inlet 10 is connected to the liquid cooling channel 9. The side wall of the liquid cooling channel 9 at one end away from the water inlet 10 is connected to an infusion hose 11. The liquid cooling medium filled in the shell 3 will also fill the liquid cooling channel 9. Therefore, the liquid cooling medium in the shell 3 spirally flows from the wiring end to the charging end, and flows into the liquid cooling channel 9 at the water inlet 10 of the liquid cooling channel 9 near the charging end, and flows from the charging end to the wiring end in the liquid cooling channel 9, and flows out through the infusion hose 11;

[0024] An insulating connecting pipe 12 is provided between the housings 3 of the two charging terminals 1 , and a port of the insulating connecting pipe 12 is connected to the infusion hose 11 . The liquid cooling medium flowing into the infusion hose 11 in the liquid cooling channel 9 flows into the insulating connecting pipe 12 through the infusion hose 11 .

[0025] The waterproof heat dissipation sleeve 7 and the charging terminal 1 are also filled with heat dissipation nylon, which can absorb the heat of the charging terminal 1 and then exchange heat with the liquid-cooling medium in the liquid-cooling channel 9 through the inner wall of the waterproof heat dissipation sleeve 7. The liquid-cooling medium in the liquid-cooling channel 9 exchanges heat with the liquid-cooling medium flowing in the outer shell 3. The liquid-cooling medium in the outer shell 3 and the liquid-cooling medium in the liquid-cooling channel 9 flow in opposite directions, which effectively improves the efficiency of heat exchange. At the same time, a number of heat dissipation fins 14 are evenly arranged along the length direction of the insulating connecting pipe 12, which can help reduce the temperature of the liquid-cooling medium that rises after heat exchange at the DC+ terminal, thereby improving the liquid cooling effect of the DC- terminal.

[0026] The liquid cooling medium of this embodiment enters the liquid cooling cable of DC+ from the liquid cooling circulation pool provided in the charging pile, enters the housing 3 of the DC+ terminal, flows through the housing 3 of the DC+ terminal, and then enters the housing 3 of the DC- terminal through the insulating connecting pipe 12, and flows in the housing 3 of the DC- terminal in the opposite direction to the flow direction of DC+, then enters the liquid cooling cable of DC-, and finally returns to the liquid cooling circulation pool, forming a liquid cooling cycle.

Claims

1. A DC+ and DC- liquid-cooled terminal for a super charging gun, comprising two charging terminals (1), a bracket (2) and a housing (3), wherein the two charging terminals (1) are DC+ and DC- terminals arranged in parallel, one end of the housing (3) is a charging terminal, and the other end is a wiring terminal, the charging terminal (1) is fixed on the bracket (2), the bracket (2) is fixed in the housing (3), one end of the charging terminal (1) extends into the charging end of the housing (3), and the other end is connected to the wiring terminal, characterized in that: A vertical sealing baffle (4) is installed at the charging terminal and the wiring terminal in the housing (3), respectively. A connection interface (5) for the charging terminal (1) to pass through is opened in the center of the sealing baffle (4), wherein an annular liquid inlet (6) matching the liquid cooling cable flow channel is also opened on the sealing baffle (4) close to the wiring terminal. A waterproof heat dissipation sleeve (7) for the charging terminal (1) to pass through is provided on the bracket (2). An integrally formed threaded interface (8) is provided at the center of both ends of the waterproof heat dissipation sleeve (7). The threaded interface (8) is threadedly matched with the connection interface (5). The outer wall of the waterproof heat dissipation sleeve (7) adopts a sandwich structure, and the sandwich structure is a liquid cooling flow channel (9). The liquid cooling flow channel (9) on the top surface of one end of the waterproof heat dissipation sleeve (7) is opened. A funnel-shaped water inlet (10) is provided, the water inlet (10) is connected to a liquid cooling channel (9), a side wall of the liquid cooling channel (9) at one end away from the water inlet (10) is connected to an infusion hose (11), an insulating connecting pipe (12) is provided between the shells (3) of the two charging terminals (1), the port of the insulating connecting pipe (12) is connected to the infusion hose (11), a plurality of spiral blades (13) are provided on the waterproof heat dissipation sleeve (7) along its length direction, and the edges of the spiral blades (13) are tightly attached to the outer wall and the inner wall; a sealing ring is also provided between the threaded interface (8) and the connection interface (5); a plurality of heat dissipation fins (14) are evenly arranged on the insulating connecting pipe (12) along its length direction.

2. The DC+ and DC- liquid-cooled terminals for a super charging gun according to claim 1, characterized in that: Heat dissipation nylon is also filled between the waterproof heat dissipation sleeve (7) and the charging terminal (1).

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