Integrated liquid cooling terminal

Abstract

The utility model discloses an integrated liquid cooling terminal, which belongs to the technical field of direct current charging guns and comprises a contact pin shell, a cavity is arranged in the contact pin shell, a vertical section of the cavity is a liquid outlet channel, the liquid outlet channel is communicated with a liquid outlet hole, an adapter is mounted on the contact pin shell and comprises a blocking part, and the blocking part is communicated with the liquid outlet hole. According to the utility model, through the integrated design, the cable conductor and the contact terminal are directly crimped, the contact resistance is reduced, the conductivity is enhanced, the generation of heat is reduced from the inside under the condition that the flowing of cooling liquid is not influenced, and the internal cavity of the terminal adopts a split conduit form, so that the connection of the cable conductor and the contact terminal is facilitated. The cooling liquid can smoothly flow back downwards from the top of the terminal, so that the whole terminal is better cooled, and the integrated structural form avoids the conditions of terminal separation, charging failure and the like caused by traditional split disconnection.

Description

Technical Field

[0001] This utility model relates to the field of DC charging gun technology, specifically an integrated liquid-cooled terminal. Background Technology

[0002] As a charging connector for new energy vehicles, the charging gun connects the vehicle to the charging pile, and the terminal is the most critical contact component. As consumers' demands for charging speed continue to increase, DC charging guns have become the mainstream product for social operation piles, and the current has gradually increased from a maximum of 250A to over 600A.

[0003] During charging, high voltage and high current are conducted into the car battery through cables and terminals. The charging terminals and cable conductors of the charging gun or charging socket will generate heat due to resistance. The connection between the terminals and the cable is the main heat source. As the temperature rises, the resistance will increase, forming a vicious cycle. Excessive temperature will affect the charging power and pose a safety hazard.

[0004] Currently, to reduce the temperature of charging terminals and crimping points during high-power charging, liquid cooling or air cooling is generally used at the crimping points. If a current of 400A or more is required, oil cooling is generally the only option. However, existing oil cooling structures on the market are usually separate structures, where the cable connection block and the plug terminal are two separate parts that are fitted together by interference fit. This type of solution has problems such as unstable contact, high contact resistance, easy leakage, and difficulty in assembly. There is even a risk of the cable conductor falling off the terminal. For charging terminals that are frequently plugged and unplugged, separate crimping terminals have risks that are difficult to overcome. Therefore, an integrated liquid-cooled terminal is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated liquid-cooled terminal to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated liquid-cooled terminal, comprising a pin housing, wherein a cavity is provided inside the pin housing, the vertical section of the cavity is a liquid outlet channel, the liquid outlet channel is connected to a liquid outlet hole, and an adapter is installed on the pin housing, the adapter comprising a blocking part, wherein a first adapter tube and a second adapter tube are respectively installed in the blocking part.

[0007] As a further preferred embodiment of this technical solution: the end of the first adapter pipe away from the obstruction part passes through the pin housing, and the liquid outlet is connected to the first adapter pipe, so that the coolant can flow out smoothly from the cavity through the above operation.

[0008] As a further preferred embodiment of this technical solution: a pin inner core is installed inside the pin housing and below the liquid outlet channel.

[0009] As a further preferred embodiment of this technical solution: the inner core of the insertion pin includes a guide tube and an insertion part, the guide tube is cylindrical, and there is a gap between the cavity and the guide tube.

[0010] As a further preferred embodiment of this technical solution: two liquid inlet holes are symmetrically provided on the pin housing, and the two liquid inlet holes are connected to the cavity, so as to guide the coolant into the cavity.

[0011] As a further preferred embodiment of this technical solution: a pressure relief hole is provided on the top of the pin housing, and a sealing head is installed on the pin housing and located in the pressure relief hole. The pressure relief hole is provided to balance the air pressure inside and outside the pin housing, and the sealing head is used to control the opening and closing of the pressure relief hole.

[0012] As a further preferred embodiment of this technical solution: a fastener is installed at the end of the second adapter pipe away from the obstruction part. The fastener is used to seal the second adapter pipe, ensuring the sealing of the device when the coolant does not drain out, and to allow the fastener to be removed for connecting the second adapter pipe to the external outlet pipe.

[0013] As a further preferred embodiment of this technical solution: an insulating head is installed on one side of the pin housing to ensure the stability and safety of the electrical connection.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model adopts an integrated design, which integrates the conductor terminal at the cable crimping point with the charging terminal (connected to the socket), thereby enhancing connection stability. The cable crimping point, the charging terminal cavity, and the entire cable are all immersed in cooling oil, ensuring that the heating component can be cooled. By hollowing out the inside of the terminal, the coolant can circulate and cool inside the terminal, better reducing the high temperature of the front terminal caused by charging contact, thereby reducing the risk of overheating and keeping the charging power stable.

[0016] 2. This utility model, through its integrated design, allows for direct crimping between the cable conductor and the contact terminal. This reduces contact resistance and enhances conductivity without affecting the flow of coolant, thereby reducing heat generation from within. The internal cavity of the terminal is provided by a separate conduit, allowing the coolant to flow smoothly from the top of the terminal downwards, thus better cooling the entire terminal. The integrated structure avoids the terminal separation and charging failure caused by the traditional separate design. It can also reduce temperature rise and contact resistance better than conventional liquid-cooled terminals, reducing temperature from both the inside and outside, making it safer and more reliable.

[0017] 3. The terminal and cable conductor crimping part and liquid inlet position of this utility model adopt an integrated design, which enhances the stability of the connection and reduces the risk of separation of the separate terminals. It eliminates the contact resistance of the separate terminals and is safer and more reliable. At the same time, the guide tube and the plug part are integrated and penetrate into the cavity. The coolant enters the terminal through the core of the pin while completely wrapping the conductor in the cable cavity, and then exits after internal circulation. This can quickly remove the heat of the cable, thereby improving the cooling performance of the coolant on the charging gun as a whole. Attached Figure Description

[0018] Figure 1 This is a first structural schematic diagram of an integrated liquid-cooled terminal according to the present invention;

[0019] Figure 2 This is an exploded view of the integrated liquid-cooled terminal according to the present invention.

[0020] Figure 3 This is a schematic diagram of the second structure of an integrated liquid-cooled terminal according to the present invention;

[0021] Figure 4 This is a cross-sectional structural diagram of an integrated liquid-cooled terminal according to the present invention.

[0022] In the diagram: 1. Pin housing; 11. Liquid outlet channel; 12. Liquid outlet hole; 13. Liquid inlet hole; 14. Pressure relief hole; 2. Sealing head; 3. Adapter; 31. First adapter pipe; 32. Barrier part; 33. Second adapter pipe; 4. Fastener; 5. Insulating head; 6. Pin inner core. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Example 1

[0025] Please see Figures 1-4 This utility model provides a technical solution: an integrated liquid-cooled terminal, including a pin housing 1, a cavity is opened in the pin housing 1, the vertical section of the cavity is a liquid outlet channel 11, the liquid outlet channel 11 is connected to a liquid outlet hole 12, an adapter 3 is installed on the pin housing 1, the adapter 3 includes a blocking part 32, and a first adapter tube 31 and a second adapter tube 33 are respectively installed in the blocking part 32.

[0026] In this embodiment, specifically: the end of the first adapter pipe 31 away from the blocking part 32 passes through the pin housing 1, and the liquid outlet 12 is connected to the first adapter pipe 31, so that the coolant can flow out smoothly from the cavity through the above operation.

[0027] In this embodiment, specifically: a pin core 6 is installed inside the pin housing 1 and below the liquid outlet channel 11.

[0028] In this embodiment, specifically: the inner core 6 of the pin includes a guide tube and a plug-in part. The guide tube is cylindrical and there is a gap between the cavity and the guide tube. The gap between the cavity and the guide tube forms a liquid channel to connect the liquid inlet hole 13 and the liquid outlet hole 12. Because the length of the guide tube extends into the cavity, the coolant can penetrate into the interior of the terminal and circulate for cooling from the top, thus better cooling the terminal insertion and removal position.

[0029] Example 2

[0030] An integrated liquid-cooled terminal has two symmetrical liquid inlet holes 13 on the pin housing 1, and the two liquid inlet holes 13 are connected to a cavity. The liquid inlet holes 13 are used to guide the coolant into the cavity, thereby achieving effective heat conduction and heat dissipation.

[0031] In this embodiment, specifically: a pressure relief hole 14 is provided on the top of the pin housing 1, and a sealing head 2 is installed on the pin housing 1 and located in the pressure relief hole 14. The pressure relief hole 14 is used to balance the air pressure inside and outside the pin housing 1 to prevent the device from being damaged due to air pressure changes, and the sealing head 2 is used to control the opening and closing of the pressure relief hole 14.

[0032] In this embodiment, specifically: a fastener 4 is installed at the end of the second adapter pipe 33 away from the barrier part 32. The fastener 4 is used to seal the second adapter pipe 33 to ensure the sealing of the device when the coolant is not discharged. On the other hand, the fastener 4 can be removed to connect the second adapter pipe 33 to the external outlet pipe, so as to smoothly realize the external discharge operation.

[0033] In this embodiment, specifically: an insulating head 5 is installed on one side of the pin housing 1. The insulating head 5 is used to ensure the stability and safety of the electrical connection, while providing good sealing and insulation effects.

[0034] Working principle: The device is composed of a pin housing 1, a sealing head 2, an adapter 3, a fastener 4, an insulating head 5, and a pin core 6. The pin housing 1 has a cavity inside and a liquid inlet hole 13 and a liquid outlet hole 12 connected to the cavity. The pin core 6 is connected to the cavity and includes a plug part and a guide tube. The guide tube is cylindrical and is inserted into the cavity through the liquid inlet hole 13. There is a gap between the cavity and the guide tube to form a liquid channel to connect the liquid inlet hole 13 and the liquid outlet hole 12. Because the length of the guide tube extends into the cavity, the coolant can penetrate into the terminal and circulate cooling from the top, thereby better cooling the terminal insertion and removal position.

[0035] The adapter 3 includes a first adapter pipe 31, a barrier part 32, and a second adapter pipe 33. The first adapter pipe 31 and the second adapter pipe 33 are installed on both sides of the barrier part 32, respectively. The first adapter pipe 31 is connected to the liquid outlet hole 12. The second adapter pipe 33 is used to connect the external liquid outlet pipe after removing the fastener 4, thereby connecting the liquid outlet hole 12 and the external liquid outlet pipe, so that the coolant can flow out smoothly from the cavity. At the same time, the pressure relief hole 14 is used to balance the air pressure inside and outside the pin housing 1 to prevent the device from being damaged due to air pressure changes. The opening and closing of the pressure relief hole 14 is controlled by the provided sealing head 2.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated liquid-cooled terminal, comprising a pin housing (1), characterized in that: The needle housing (1) has a cavity, the vertical section of which is a liquid outlet channel (11), the liquid outlet channel (11) is connected to a liquid outlet hole (12), and an adapter (3) is installed on the needle housing (1). The adapter (3) includes a blocking part (32), and a first adapter pipe (31) and a second adapter pipe (33) are respectively installed in the blocking part (32).

2. The integrated liquid-cooled terminal according to claim 1, characterized in that: The first adapter (31) extends through the needle housing (1) at the end away from the barrier (32), and the liquid outlet (12) is connected to the first adapter (31).

3. The integrated liquid-cooled terminal according to claim 1, characterized in that: The insert core (6) is installed inside the insert housing (1) and below the liquid outlet channel (11).

4. The integrated liquid-cooled terminal according to claim 3, characterized in that: The insert core (6) includes a guide tube and an insertion part. The guide tube is cylindrical and there is a gap between the cavity and the guide tube.

5. The integrated liquid-cooled terminal according to claim 1, characterized in that: The insert housing (1) has two symmetrical liquid inlet holes (13), and the two liquid inlet holes (13) are connected to the cavity.

6. The integrated liquid-cooled terminal according to claim 1, characterized in that: The top of the pin housing (1) is provided with a pressure relief hole (14), and a sealing head (2) is installed on the pin housing (1) and inside the pressure relief hole (14).

7. The integrated liquid-cooled terminal according to claim 1, characterized in that: The second adapter (33) has a fastener (4) installed at the end away from the barrier (32).

8. The integrated liquid-cooled terminal according to claim 1, characterized in that: An insulating head (5) is installed on one side of the pin housing (1).

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