A pin terminal cooling device

Abstract

The application relates to the technical field of DC terminal cooling, in particular to a pin terminal cooling device which comprises a shell, a mounting support and a plurality of terminals are arranged in the shell, the terminals are mounted on the shell through the mounting support, a plurality of cavities are formed between the mounting support and the shell, one terminal is arranged in each cavity, a cooling liquid tank is arranged on each terminal which carries a large power current, the cooling liquid tank is in communication with an external liquid cooling system, one end of the terminal inserted into the cavity is arranged in an L-shaped structure, the cooling liquid tank is attached to the inside of the L-shaped structure, and two adjacent side walls of the cooling liquid tank are respectively attached to two side walls of the L-shaped structure. The application has the effect of improving the heat dissipation efficiency of the pin terminal.

Description

Technical Field

[0001] This application relates to the field of DC terminal cooling technology, and in particular to a pin terminal cooling device. Background Technology

[0002] As a key component for electrical connections, connector pins play a vital role in industrial automation, electronic equipment, and various electrical systems. For example, the metal conductive pins on the charging gun head, used to connect to a vehicle charging socket, are responsible for transmitting power. Their design, materials, and usage directly affect the safety and reliability of charging.

[0003] As electronic devices increasingly demand higher power density, a large amount of heat is generated during the overload of high current at the pin terminals. The temperature rise of the pin terminals affects the maximum current limit that the electronic device can handle, directly impacting charging efficiency and charging time, and also posing significant safety hazards. Therefore, effective cooling measures are necessary.

[0004] In recent years, liquid cooling technology has gradually become the mainstream solution for cooling high-power electronic devices due to its high heat capacity and high thermal conductivity. However, these methods have significant shortcomings in terms of heat dissipation efficiency and space utilization, especially in the application of small components such as pin terminals, which still face challenges. Utility Model Content

[0005] To improve the heat dissipation efficiency of pin terminals, this application provides a pin terminal cooling device.

[0006] The pin terminal cooling device provided in this application adopts the following technical solution: A pin terminal cooling device includes a housing, within which a mounting bracket and multiple terminals are disposed. The terminals are mounted on the housing via the mounting bracket, and multiple cavities are formed between the mounting bracket and the housing. Each cavity contains one terminal, and each terminal carrying a high-power current is provided with a coolant tank, which is connected to an external liquid cooling system. One end of the terminal inserted into the cavity is configured as an L-shaped structure, and the coolant tank is attached to the inside of the L-shaped structure. Two adjacent sidewalls of the coolant tank are respectively attached to two sidewalls of the L-shaped structure.

[0007] By adopting the above technical solution, the contact area between the coolant tank and the terminals is increased, thereby improving the cooling effect.

[0008] Optionally, the terminal includes a first end piece and a second end piece that are perpendicular to each other. The plane of the first end piece is perpendicular to the direction of the terminal axis, and the plane of the second end piece is parallel to the direction of the terminal axis. The second end piece is disposed in the cavity on the side close to the housing along the circumferential direction. The coolant tank is disposed in the cavity on the side close to the central axis of the housing. Two adjacent side walls of the coolant tank are respectively attached to the side walls opposite to the first end piece and the second end piece.

[0009] By adopting the above technical solution, the shape of the terminals is improved. The contact area between the coolant tank and the terminals is increased through the contact of the two planes, thus enhancing the cooling effect. The two coolant tanks are positioned close to the housing axis. This design helps improve heat dissipation at the center of the housing, preventing heat accumulation and excessive temperature rise that could have adverse effects.

[0010] Optionally, the coolant tank is connected to an inlet pipe and an outlet pipe, which are connected to an external liquid cooling system; a partition plate is provided inside the coolant tank, and a liquid cooling circuit is formed between the partition plate and the inner wall of the coolant tank; the inlet pipe and the outlet pipe are respectively connected to the liquid cooling circuits on both sides of the partition plate.

[0011] By adopting the above technical solution, the partition plate can guide the coolant to move along the circuit direction, which is beneficial for heat dissipation.

[0012] Optionally, four screw holes are provided at the four corners of the coolant tank. The screw holes penetrate the sidewall of the coolant tank in the thickness direction. Bolts are installed in the screw holes, and the coolant tank is fixedly connected to the second end plate by the bolts.

[0013] By adopting the above technical solution, the coolant tank is fixedly connected to the second end plate by bolts to ensure that the side wall of the coolant tank is in contact with the side wall of the second end plate, thereby improving the heat dissipation effect.

[0014] Optionally, the terminal has a first annular groove and a second annular groove on the peripheral wall at one end of the cavity. The housing has an insertion hole that matches the first annular groove. An O-ring is provided in the first annular groove, and the terminal is interference-fitted with the housing through the O-ring. The mounting bracket has a mounting ring at one end near the cavity. The side opening of the mounting ring is C-shaped to allow the terminal to enter. The mounting ring can be inserted into the second annular groove.

[0015] Optionally, a wire is ultrasonically welded to the terminal, and the wire is connected to the end of the second end piece away from the first end piece.

[0016] By adopting the above technical solution, during terminal installation, the wire is first ultrasonically welded to the second end piece, then the coolant tank is fixed to the second end piece with bolts, and then the O-ring is fitted into the first annular groove. At this point, the operator approaches the mounting ring from the side of the mounting bracket and inserts it into the cavity through the opening, allowing the mounting ring to be inserted into the second annular groove. Then, the mounting bracket and terminal assembly are inserted into the housing along the axial direction. Once in place, the O-ring is press-fitted into the inner wall of the socket, and the mounting bracket is then fixed to the housing with bolts, completing the terminal installation.

[0017] Optionally, a detection bracket is provided on the same side of the mounting bracket for multiple cavities, and a leakage sensor is provided inside the detection bracket; the detection bracket is fixedly mounted on the mounting bracket by bolts.

[0018] Optionally, the detection bracket has a U-shaped groove, the detection wire of the leakage sensor passes through the U-shaped groove, and the top wall of the detection bracket has a detection hole that communicates with the U-shaped groove. The detection wire of the leakage sensor detects external leakage through the detection hole.

[0019] By adopting the above technical solution, the remaining space inside the housing is used to test the liquid cooling device, thereby improving the safety of the pin terminal cooling structure.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. When installing the terminal, first ultrasonically weld the wire to the second end piece, then fix the coolant tank to the second end piece with bolts, and then fit the O-ring into the first annular groove. At this time, the operator moves the terminal from the side of the mounting bracket close to the mounting ring and inserts it into the cavity through the opening, so that the mounting ring is inserted into the second annular groove. Then, insert the mounting bracket and the terminal as a whole into the housing along the axial direction. After it is in place, the O-ring is interference-fitted with the inner wall of the socket. Finally, fix the mounting bracket to the housing with bolts to complete the terminal installation. 2. This application improves the shape of the terminal by increasing the contact area between the coolant tank and the terminal through the mating of the planes, thereby improving the cooling effect; 3. The coolant tank is positioned closer to the central axis of the housing than the terminals, which improves heat dissipation at the center of the housing and prevents heat accumulation and excessive temperature rise. Heat on the inner side of the terminals (closest to the axis) can be dissipated through the coolant tank, while heat on the outer side of the terminals can be dissipated outwards through the housing. This provides better heat dissipation compared to existing cooling systems. 4. The installation of the detection bracket and leakage sensor allows for the detection of the liquid cooling device using the remaining space inside the housing, improving the safety of the pin terminal cooling structure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a pin terminal cooling device according to an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the structure of the housing and mounting bracket in an embodiment of this application.

[0023] Figure 3 This is a schematic diagram of the structure of the terminal and mounting bracket in an embodiment of this application.

[0024] Figure 4 This is a schematic diagram of the structure of the first end piece and the second end piece in an embodiment of this application.

[0025] Figure 5 This is a schematic diagram of the structure of the coolant tank and the second end piece in an embodiment of this application.

[0026] Figure 6 This is a schematic diagram of the structure of the partition plate in an embodiment of this application.

[0027] Figure 7 This is a schematic diagram of the structure of the detection bracket in an embodiment of this application.

[0028] Figure 8 This is a schematic diagram of the structure of the leakage sensor in an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Insertion hole; 2. Mounting bracket; 21. Cavity; 22. Mounting ring; 3. Terminal; 31. First end piece; 32. Second end piece; 33. First annular groove; 34. Second annular groove; 35. O-ring; 4. Coolant tank; 41. Divider plate; 43. Screw hole; 5. Inlet pipe; 6. Outlet pipe; 7. Wire; 8. Detection bracket; 81. U-shaped groove; 82. Detection hole; 9. Leakage sensor; 91. Detection line. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0031] This application discloses a pin terminal cooling device. (Refer to...) Figure 1 and Figure 2 A cooling device for a pin terminal 3 includes a housing 1. A mounting bracket 2 and multiple terminals 3 are disposed within the housing 1. The terminals 3 are mounted on the housing 1 via the mounting bracket 2. Multiple cavities 21 are formed between the mounting bracket 2 and the housing 1, and the multiple cavities 21 are arranged circumferentially around the axis of the housing 1. Each cavity 21 contains one terminal 3. In this embodiment, each housing 1 contains two terminals 3 capable of carrying high current, and the two terminals 3 are symmetrically arranged on the left and right sides of the housing 1, respectively. The mounting bracket 2 has two corresponding cavities 21 on its left and right sides.

[0032] Reference Figure 3 and Figure 4 The terminal 3, which carries a high current, is inserted into the cavity 21 at one end and is L-shaped. It includes a first end piece 31 and a second end piece 32 that are perpendicular to each other and are integrally formed. The plane of the first end piece 31 is perpendicular to the axis of the terminal 3, and the plane of the second end piece 32 is parallel to the axis of the terminal 3.

[0033] Each high-current-load terminal 3 is equipped with a coolant tank 4. Two adjacent sidewalls of the coolant tank 4 are respectively attached to the opposite sidewalls of the first end piece 31 and the second end piece 32, with the planes touching each other, increasing the contact area between the coolant tank 4 and the terminal 3 and improving the cooling effect. The coolant tank 4 is an alumina ceramic water tank, manufactured using the lost-wax casting method in one piece.

[0034] Reference Figure 2 and Figure 3 The second end piece 32 is disposed within the cavity 21 along the circumferential direction near the housing 1, and the coolant tank 4 is disposed within the cavity 21 near the central axis of the housing 1. That is, the two coolant tanks 4 are disposed closer to the axis of the housing 1 than the terminal 3. This design improves heat dissipation at the center of the housing 1, preventing heat accumulation and excessive temperature rise. Heat on the inner side of the terminal 3, near the axis, can be dissipated through the coolant tank 4, while heat on the outer side of the terminal 3 can be dissipated outwards through the housing 1.

[0035] Reference Figure 5 and Figure 6 The coolant tank 4 is equipped with an inlet pipe 5 and an outlet pipe 6. A short pipe is connected to the side wall of the coolant tank 4. The inlet pipe 5 and the outlet pipe 6 are fitted onto the outside of the short pipe, and clamps are installed on them to fix the inlet pipe 5 and the outlet pipe 6 to the short pipe, thus fixing them to the coolant tank 4. A partition plate 41 is installed inside the coolant tank 4, forming a liquid cooling circuit between the partition plate 41 and the inner wall of the coolant tank 4. The inlet pipe 5 and the outlet pipe 6 are connected to the liquid cooling circuits on both sides of the partition plate 41, respectively. The partition plate 41 guides the coolant to move along the circuit direction, which is beneficial for heat dissipation.

[0036] Reference Figure 5 and Figure 6Four screw holes 43 are provided at the four corners of the coolant tank 4. The screw holes 43 penetrate the sidewall of the coolant tank 4 in the thickness direction. Bolts are installed in the screw holes 43. The bolts are self-tapping screws. Holes are pre-drilled on the second end plate 32. The coolant tank 4 is fixedly connected to the second end plate 32 by bolts to ensure that the sidewall of the coolant tank 4 is in contact with the sidewall of the second end plate 32, thereby improving the heat dissipation effect. It is worth noting that the coolant tank 4 is relatively small in size due to the available space in the housing 1 and the volume of the terminal 3. Four columnar solids are provided at the four corners of the coolant tank 4. The screw holes 43 are set in the columnar solids. The columnar solids occupy part of the space inside the coolant tank 4, but do not affect the movement of coolant along the liquid cooling circuit. At the same time, the holes on the sidewall of the coolant tank 4 that connect to the inlet pipe 5 and the outlet pipe 6 will encroach on the columnar solids. Grooves are opened on them, but they will not connect with the screw holes 43 to cause coolant leakage.

[0037] Reference Figure 3 and Figure 4 Terminal 3 has a first annular groove 33 and a second annular groove 34 on the peripheral wall of one end of the cavity 21. The housing 1 has an insertion hole 11 that matches the first annular groove 33. An O-ring 35 is provided in the first annular groove 33, and terminal 3 is interference-fitted with housing 1 through the O-ring 35. A mounting ring 22 is provided at one end of the mounting bracket 2 near the cavity 21. The side opening of the mounting ring 22 is C-shaped to allow terminal 3 to enter. The mounting ring 22 can be inserted into the second annular groove 34. A wire 7 is ultrasonically welded to terminal 3. The wire 7 is connected to the end of the second end piece 32 away from the first end piece 31, and the wire 7 is located on the side wall of the second end piece 32 away from the coolant tank 4.

[0038] When installing terminal 3, first ultrasonically weld wire 7 onto the second end piece 32, then fix coolant tank 4 onto the second end piece 32 with bolts, and then fit O-ring 35 into the first annular groove 33. At this time, the operator moves terminal 3 from the side of mounting bracket 2 towards mounting ring 22 and inserts it into cavity 21 through the opening, so that mounting ring 22 is inserted into the second annular groove 34. Then, the mounting bracket 2 and terminal 3 are inserted into housing 1 along the axial direction. After they are in place, O-ring 35 is interference-fitted with the inner wall of insertion hole 11, and then mounting bracket 2 is fixed to housing 1 with bolts, completing the installation of terminal 3.

[0039] Reference Figure 7 and Figure 8A detection bracket 8 is installed on the same side of the mounting bracket 2 as the cavity 21, and a leakage sensor 9 is installed inside the detection bracket 8. The detection bracket 8 is located at the bottom of the mounting bracket 2 and is fixed to the mounting bracket 2 by bolts. A U-shaped groove 81 is formed inside the detection bracket 8, and the detection line 91 of the leakage sensor 9 passes through the U-shaped groove 81. A detection hole 82 is formed on the top wall of the detection bracket 8, which communicates with the U-shaped groove 81. The detection line 91 of the leakage sensor 9 detects external leakage through the detection hole 82. The remaining space inside the housing 1 is used to detect the liquid cooling device, improving the safety of the cooling structure of the pin terminal 3. The principle of the leakage sensor 9 is existing technology and will not be described in detail here.

[0040] The implementation principle of the cooling device for the pin terminal 3 in this application embodiment is as follows: When installing the terminal 3, the wire 7 is first ultrasonically welded to the second end piece 32, and then the coolant tank 4 is fixed to the second end piece 32 with bolts. Subsequently, the O-ring 35 is fitted into the first annular groove 33. At this time, the operator moves the terminal 3 from the side of the mounting bracket 2 close to the mounting ring 22 and inserts it into the cavity 21 through the opening, so that the mounting ring 22 is inserted into the second annular groove 34. Then, the mounting bracket 2 and the terminal 3 are inserted into the housing 1 along the axial direction. After they are in place, the O-ring 35 is interference-fitted with the inner wall of the insertion hole 11. Finally, the mounting bracket 2 is fixed to the housing 1 with bolts, completing the installation of the terminal 3.

[0041] The coolant tank 4 is positioned closer to the central axis of the housing 1 than the terminal 3, which improves heat dissipation at the center of the housing 1 and prevents heat accumulation and excessive temperature rise. Heat on the inner side of the terminal 3, near the axis, can be dissipated through the coolant tank 4, while heat on the outer side of the terminal 3 can be dissipated outwards through the housing 1. This provides better heat dissipation than existing cooling devices. Furthermore, the placement of the detection bracket 8 and the leakage sensor 9 allows for the use of the remaining space inside the housing 1 to detect the liquid cooling system, improving the safety of the cooling structure of the pin terminal 3.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pin terminal cooling device, characterized in that: The device includes a housing (1), which contains a mounting bracket (2) and multiple terminals (3). The terminals (3) are mounted on the housing (1) via the mounting bracket (2). Multiple cavities (21) are formed between the mounting bracket (2) and the housing (1). Each cavity (21) contains a terminal (3). Each terminal (3) carrying a high-power current is provided with a coolant tank (4). The coolant tank (4) is connected to an external liquid cooling system. One end of the terminal (3) inserted into the cavity (21) is configured as an L-shaped structure. The coolant tank (4) is attached to the inside of the L-shaped structure. Two adjacent sidewalls of the coolant tank (4) are respectively attached to the two sidewalls of the L-shaped structure.

2. The pin terminal cooling device according to claim 1, characterized in that: The terminal (3) includes a first end piece (31) and a second end piece (32) that are perpendicular to each other. The plane of the first end piece (31) is perpendicular to the axis of the terminal (3), and the plane of the second end piece (32) is parallel to the axis of the terminal (3). The second end piece (32) is disposed in the cavity (21) on the side close to the shell (1) along the circumferential direction. The coolant tank (4) is disposed in the cavity (21) on the side close to the central axis of the shell (1). Two adjacent side walls of the coolant tank (4) are respectively attached to the side walls opposite to the first end piece (31) and the second end piece (32).

3. The pin terminal cooling device according to claim 1, characterized in that: The coolant tank (4) is connected to an inlet pipe (5) and an outlet pipe (6), which are connected to an external liquid cooling system. A partition plate (41) is provided inside the coolant tank (4), and a liquid cooling circuit is formed between the partition plate (41) and the inner wall of the coolant tank (4). The inlet pipe (5) and the outlet pipe (6) are respectively connected to the liquid cooling circuits on both sides of the partition plate (41).

4. A pin terminal cooling device according to claim 2, characterized in that: The coolant tank (4) has four screw holes (43) at its four corners. The screw holes (43) penetrate the sidewall of the coolant tank (4) in the thickness direction. Bolts are installed in the screw holes (43). The coolant tank (4) is fixedly connected to the second end piece (32) by bolts.

5. A pin terminal cooling device according to claim 1, characterized in that: The terminal (3) has a first annular groove (33) and a second annular groove (34) on the peripheral wall of the outer end of the cavity (21). The housing (1) is provided with an insertion hole (11) that matches the first annular groove (33). An O-ring (35) is provided in the first annular groove (33). The terminal (3) is interference-fitted with the housing (1) through the O-ring (35). The mounting bracket (2) is provided with a mounting ring (22) at one end near the cavity (21). The side opening of the mounting ring (22) is C-shaped to allow the terminal (3) to enter. The mounting ring (22) can be inserted into the second annular groove (34).

6. A pin terminal cooling device according to claim 2, characterized in that: A wire (7) is ultrasonically welded onto the terminal (3), and the wire (7) is connected to the end of the second end piece (32) away from the first end piece (31).

7. A pin terminal cooling device according to claim 1, characterized in that: The mounting bracket (2) has a detection bracket (8) on the same side of the multiple cavities (21), and a leakage sensor (9) is installed inside the detection bracket (8); the detection bracket (8) is fixedly installed on the mounting bracket (2) by bolts.

8. A pin terminal cooling device according to claim 7, characterized in that: The detection bracket (8) has a U-shaped groove (81) inside, and the detection line (91) of the leakage sensor (9) passes through the U-shaped groove (81). The top wall of the detection bracket (8) has a detection hole (82) connected to the U-shaped groove (81). The detection line (91) of the leakage sensor (9) detects external leakage through the detection hole (82).

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