A surround cooling liquid cooled terminal

Abstract

The application discloses a kind of surrounding cooling type liquid cooling terminal, including electrically conductive terminal body and immersion wire box, one end of electrically conductive terminal body is formed with lap plate, lap plate is located at one side of immersion wire box, corresponding other end of electrically conductive terminal body is formed with wiring part for electrically connecting the terminal portion of wire core, liquid cavity for accommodating terminal portion and wiring part is formed in immersion wire box, one end of immersion wire box is formed with liquid cavity liquid inlet for communicating cable cooling cavity, corresponding other end of immersion wire box is formed with liquid cavity liquid outlet, wiring part passes through liquid cavity liquid outlet, the inside of lap plate is formed with terminal internal flow channel, internal flow channel is formed with internal flow channel inlet and internal flow channel outlet, internal flow channel inlet communicates liquid cavity liquid outlet.The application is favorable to improve the heat dissipation effect of liquid cooling terminal.

Description

Technical Field

[0001] This invention relates to the field of charging terminals, and more specifically to a surround-cooled liquid-cooled terminal. Background Technology

[0002] With the increasing popularity of new energy electric vehicles, users have a growing demand for short-term charging. To improve charging speed, the industry has been increasing voltage and current to accelerate the charging rate. However, this has led to significant heat dissipation issues during charging. Therefore, liquid-cooled charging guns have emerged, such as the "Liquid-cooled Charging Gun for Electric Vehicle Charging" (Utility Model Patent Publication No. CN224297017U). These liquid-cooled charging guns are electrically connected to the charging pile via a charging cable. One end of the charging cable has a tail terminal, and the corresponding other end is electrically connected to the liquid-cooled charging gun. The tail terminal is used to connect to the output end of the charging pile. Conventional tail terminal designs primarily consider the heat dissipation of the charging cable core (which is a stranded wire), but do not address the heat dissipation structure at the contact point between the core end and the tail terminal. For example, the "Liquid-cooled end" (Utility Model Patent Publication No. CN217544935U) further addresses this issue. The liquid-cooled terminal, described as a "sub-and charging gun," has a mounting hole on the side of the copper busbar facing the sleeve for installing cables to achieve electrical connection between the cables and the copper busbar. One end of the cable is inserted into the sleeve, and as it goes deeper, it extends into the mounting hole, where it can be secured by crimping. The other end of the sleeve has a protrusion extending away from the outer wall of the sleeve. The first liquid-cooling tube and the sleeve are press-fitted through the protrusion. The connection between the wall at the mounting hole and the cable generates high heat due to the large current flow. However, the outer wall of the mounting hole is not in contact with the coolant, resulting in poor heat dissipation at the connection point. This can easily lead to excessively high temperatures in the liquid-cooled terminal. Therefore, improvements to the existing liquid-cooled terminal are necessary. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an enclosed cooling liquid-cooled terminal, which is beneficial to improving the heat dissipation effect of the liquid-cooled terminal.

[0004] The objective of this invention is achieved through the following technical solution.

[0005] The present invention discloses a surround-cooled liquid-cooled terminal, comprising a conductive terminal body and an immersion box. One end of the conductive terminal body is formed with a lap plate, which is disposed on one side of the immersion box. The other end of the conductive terminal body is formed with a wiring portion for electrically connecting the end of a conductive wire core. The immersion box contains a liquid cavity for accommodating the end of the wire core and the wiring portion. One end of the immersion box has a liquid cavity inlet for connecting to a cable cooling cavity, and the other end has a liquid cavity outlet. The wiring portion passes through the liquid cavity outlet. An internal flow channel is formed inside the lap plate, and the internal flow channel has an inlet and an outlet. The inlet of the internal flow channel connects to the outlet of the liquid cavity.

[0006] Preferably, the overlapping plate has a mounting through hole, and the terminal inner channel surrounds the outside of the mounting through hole.

[0007] Preferably, the overlapping plate is fixed to the right side of the immersion box, and the front left and rear left parts of the overlapping plate are respectively formed with the inner flow channel inlet. The wiring part is located between the front and rear inner flow channel inlets. The inner flow channel includes a longitudinal flow channel section and a transverse flow channel section. The front and rear sides of the mounting through hole are respectively provided with the longitudinal flow channel section. The transverse flow channel section is located on the right side of the mounting through hole. The left end of the longitudinal flow channel section is connected to the corresponding inner flow channel inlet. The right end of the longitudinal flow channel section is connected to the transverse flow channel section. The inner flow channel outlet is formed at the right end of the overlapping plate. One end of the transverse flow channel section is connected to the inner flow channel outlet.

[0008] Preferably, the cross-section of the inner flow channel is a vertical strip.

[0009] Preferably, the right end of the immersion box is connected to the left end of the overlapping plate by a first screw, a first sealing ring is provided between the right end face of the immersion box and the left end face of the overlapping plate, the inner flow channel inlet is located inside the first sealing ring, and the first screw is distributed outside the first sealing ring.

[0010] Preferably, a first protruding pin is formed on the right end face of the immersion box, the first protruding pin is located on the front and rear sides of the first sealing ring respectively, and the first protruding pin is adapted to be inserted into the overlapping plate.

[0011] Preferably, the liquid-cooled terminal of the present invention further includes a connector seat, which is mounted on the front side of the lap plate by a second screw. The connector seat has a connector seat inlet, which is aligned with and connected to the inner flow channel outlet. A liquid-passing connector is formed on the connector seat, which is connected to the connector seat inlet. A second sealing ring is provided between the connector seat and the lap plate. The inner flow channel outlet is located inside the second sealing ring, and the second screw is distributed outside the second sealing ring.

[0012] Preferably, a second protruding pin is formed on the connector seat, the second protruding pin is located to the left of the second sealing ring, the second protruding pin is distributed vertically, and the second protruding pin is adapted to be inserted into the right part of the overlapping plate.

[0013] Preferably, the liquid-cooled terminal of the present invention further includes a sheath connector for insertion into the end of the liquid-conducting sheath, one end of the sheath connector being integrally connected to the immersion box, and a connector cavity for the conductive wire core to pass through is formed inside the sheath connector, the connector cavity being connected to the liquid inlet of the liquid chamber.

[0014] Preferably, the wiring portion is plate-shaped, and one side of the wiring portion has a welding surface for ultrasonic welding of the end of the wire core in the form of a flat wire.

[0015] Compared with the prior art, the beneficial effects of this invention are as follows: By setting a conductive terminal body and an immersion box, a lap plate is formed at one end of the conductive terminal body, which is located on one side of the immersion box. The corresponding other end of the conductive terminal body has a wiring portion for electrically connecting the end of the conductive wire core. A liquid cavity for accommodating the end of the wire core and the wiring portion is formed inside the immersion box. A liquid cavity inlet for connecting to the cable cooling cavity is formed at one end of the immersion box, and a liquid cavity outlet is formed at the corresponding other end of the immersion box. The wiring portion passes through the liquid cavity outlet. An internal flow channel is formed inside the lap plate, with an internal flow channel inlet and an internal flow channel outlet. The internal flow channel inlet connects to the liquid cavity outlet, allowing the assembly of the wiring portion and the end of the wire core to be immersed in the coolant. This is beneficial for improving the heat dissipation effect of the liquid-cooled terminal, because the heat of the lap plate can be transferred to the coolant flowing through the internal flow channel of the terminal, thereby improving the heat dissipation effect of the liquid-cooled terminal. Attached Figure Description

[0016] Figure 1 This is a left-side perspective three-dimensional structural diagram of the liquid-cooled terminal of the present invention.

[0017] Figure 2 This is a left-side bottom-view perspective view of the three-dimensional structure of the combination of the liquid-cooled terminal and one end of the liquid-cooled cable of the present invention.

[0018] Figure 3This is a right-side top-view perspective view of the three-dimensional structure of the liquid-cooled terminal and one end of the liquid-cooled cable of the present invention.

[0019] Figure 4 This is a top-down exploded view of the combination of the liquid-cooled terminal and one end of the liquid-cooled cable of the present invention.

[0020] Figure 5 This is a right-side exploded top view of the combination of the liquid-cooled terminal and one end of the liquid-cooled cable of the present invention.

[0021] Figure 6 This is a frontal cross-sectional view of the combination of the liquid-cooled terminal and one end of the liquid-cooled cable of the present invention.

[0022] Figure 7 This is a top-view cross-sectional view of the combination of the liquid-cooled terminal and one end of the liquid-cooled cable of the present invention.

[0023] Figure 8 This is a left top view of the three-dimensional structure of the conductive terminal body of the present invention.

[0024] Figure 9 This is a top view of the cross-sectional structure of the conductive terminal body of the present invention.

[0025] Figure 10 This is a right-side top-view perspective view of the three-dimensional structure of the immersion line box of the present invention.

[0026] Figure 11 This is a top view of the cross-sectional structure of the immersion box of the present invention.

[0027] Figure 12 This is a left-side perspective three-dimensional structural diagram of the connector seat of the present invention.

[0028] Labeling explanation: Conductive terminal body 1; Overlap plate 11; Mounting through hole 1101; First frame groove 1102; First positioning blind hole 1103; Second frame groove 1104; Second positioning blind hole 1105; Terminal inner flow channel 100; Inner flow channel inlet 1001; 1002; 1003; 1004; 12; 121; 2; 2; 21; 3; 3; 30; 301; 302; 303; 31; 32; 5; 50; 501; 502; 502; 51; 52; 7; 8; 98; 99; 991; 980; 980; Detailed Implementation

[0029] The present invention will now be further described with reference to the accompanying drawings.

[0030] The surround-cooled liquid-cooled terminal of the present invention, such as Figures 1 to 7 As shown, the device includes a conductive terminal body 1 and a wire-immersion housing 3. The conductive terminal body 1 is made of copper, and a lap plate 11 is formed at one end of the conductive terminal body 1. The lap plate 11 is cuboid in shape. Liquid-cooled cables are existing technology. For an example of a liquid-cooled cable, please refer to the utility model patent publication number CN218471660U, "A Liquid-Cooled Cable". Figures 2 to 7 As shown, the liquid-cooled cable includes a liquid-conducting sheath 98 and a conductive core 99. The liquid-conducting sheath 98 is fitted over the conductive core 99. A cable cooling cavity 980 is provided between the inner wall of the liquid-conducting sheath 98 and the conductive core 99. The liquid-conducting sheath 98 is made of insulating material, and the conductive core 99 is a stranded wire. Figures 1 to 7 As shown, the overlap plate 11 is located on one side of the immersion box 3. Specifically, in Figure 6 From a visual perspective, the lap plate 11 is located on the right side of the immersion box 3, and the other end of the conductive terminal body 1 corresponding to it has a wiring portion 12 for electrically connecting the wire core end 991 of the conductive wire core 99, such as... Figure 6 , Figure 7 , Figure 10 and Figure 11 As shown, a liquid cavity 30 is formed inside the immersion box 3 to accommodate the wire core end 991 and the connector 12. The inner wall of the liquid cavity 30 is separate from the wire core end 991 and the connector 12, meaning that the wire core end 991 and the connector 12 do not contact the inner wall of the liquid cavity 30. The liquid cavity 30 is approximately a cuboid cavity. One end of the immersion box 3 has a liquid cavity inlet 302 for connecting to the cable cooling cavity 980. The liquid cavity inlet 302 is circular. The corresponding other end of the immersion box 3 has a liquid cavity outlet 301, which is rectangular. In other words, the liquid cavity inlet 302 and the liquid cavity outlet 301 are respectively connected to the liquid cavity 30. Figure 6 and Figure 7 As shown, the wiring part 12 passes through the liquid outlet 301 of the liquid chamber, so that the wiring part 12 is located inside the liquid chamber 30, as... Figures 6 to 9 As shown, the interior of the lap plate 11 has a terminal internal flow channel 100, which has an internal flow channel inlet 1001 and an internal flow channel outlet 1002. The internal flow channel inlet 1001 is connected to the liquid outlet 301 of the liquid chamber.

[0031] like Figure 2 and Figure 6As shown, when using the liquid-cooled terminal of the present invention, one end of the liquid-cooled cable is connected to the liquid-cooled terminal of the present invention. Specifically, the core end 991 of the conductive core 99 of the liquid-cooled cable is electrically connected to the aforementioned wiring portion 12, and the cable cooling chamber 980 of the liquid-cooled cable is connected to the liquid chamber inlet 302. The contact plate 11 is then connected to the output end of the charging pile, that is, the contact plate 11 is electrically connected to the output end of the charging pile. When the coolant in the coolant container is delivered to the cable cooling chamber 980 by a liquid pump, the coolant flows through the liquid chamber inlet 302 into the liquid chamber 30, and then the coolant fills the liquid chamber 30. Afterward, the coolant flows through the liquid chamber outlet 301 into the inner flow channel inlet 1001, flows through the terminal inner flow channel 100, and then the coolant is discharged from the inner flow channel outlet 1002. The inner flow channel outlet 1002 can be connected to the aforementioned coolant container through a corresponding pipe, and then the coolant can return to the aforementioned coolant container. Figure 6 and Figure 7 As shown, since the wiring part 12 passes through the liquid outlet 301 of the liquid chamber, the wiring part 12 is located inside the liquid chamber 30. Thus, the wire core end 991 and the wiring part 12 are located inside the liquid chamber 30. The connection part between the wire core end 991 and the wiring part 12 is located inside the liquid chamber 30. That is to say, the combination of the wiring part 12 and the wire core end 991 can be immersed in the coolant inside the liquid chamber 30. It can also be understood that the coolant surrounds the combination of the wiring part 12 and the wire core end 991. The combination of the wiring part 12 and the wire core end 991 can be in direct contact with the coolant, so that the heat generated by the current passing through the connection part between the wire core end 991 and the wiring part 12 can be directly transferred to the coolant. Then, the coolant carries the heat away from the liquid-cooled terminal of the present invention, thereby improving the heat dissipation effect of the liquid-cooled terminal. During charging, current flows between the contact plate 11 and the output terminal of the charging pile, so the contact plate 11 will also generate high temperature. Because the contact plate 11 has a terminal internal flow channel 100, the coolant can flow through the terminal internal flow channel 100. Thus, the heat of the contact plate 11 can be transferred to the coolant flowing through the terminal internal flow channel 100, and then the coolant carries away the heat, so that the contact plate 11 can be cooled more effectively, which further helps to improve the heat dissipation effect of the liquid-cooled terminal.

[0032] Furthermore, such as Figure 3 and Figure 8As shown, a mounting through hole 1101 is formed on the overlapping plate 11. The mounting through hole 1101 extends vertically. When using the liquid-cooled terminal of the present invention, the overlapping plate 11 is placed on the output end of the charging pile. It can be installed in the mounting through hole 1101 using bolts. The bolts pass through the output end of the charging pile, and a nut is screwed onto the bolts. The overlapping plate 11 and the output end of the charging pile are sandwiched between the nut and the head of the bolt. This allows the lower edge of the mounting through hole 1101 to closely contact the output end of the charging pile, resulting in better conductivity between the lower edge of the mounting through hole 1101 and the output end of the charging pile. Current flows through the portion of the overlapping plate 11 radially outside the mounting through hole 1101, such as... Figure 6 and Figure 7 As shown, the terminal inner flow channel 100 surrounds the outside of the mounting through hole 1101, so the heat generated by the overlapping plate 11 at the radially outer part of the mounting through hole 1101 is transferred outward and then absorbed by the coolant flowing through the terminal inner flow channel 100.

[0033] Furthermore, such as Figures 6 to 8 As shown, the overlapping plate 11 is fixed to the right side of the immersion box 3, so the liquid outlet 301 is located at the right end of the immersion box 3, and the liquid inlet 302 is located at the left end of the immersion box 3. The front left and rear left parts of the overlapping plate 11 respectively form inner flow channel inlets 1001. The wiring part 12 is located between the two inner flow channel inlets 1001. The inner flow channel inlets 1001 are located within the corresponding range of the liquid outlet 301. The inner flow channel 100 includes a longitudinal flow channel section 1003 and a transverse flow channel section 1004. A connecting pipe is installed... The front and rear sides of the through hole 1101 are respectively provided with longitudinal flow channel sections 1003, and the transverse flow channel section 1004 is provided on the right side of the through hole 1101. The left ends of the longitudinal flow channel sections 1003 are connected to the corresponding inner flow channel inlets 1001, and the right ends of the longitudinal flow channel sections 1003 are connected to the transverse flow channel sections 1004. The inner flow channel outlet 1002 is formed at the right end of the overlapping plate 11, and one end of the transverse flow channel section 1004 is connected to the inner flow channel outlet 1002. Thus, from a top view, the inner flow channel 100 surrounds the through hole 1101 on three sides, as shown below. Figure 7 As shown, because the wiring part 12 passes through the liquid outlet 301 of the liquid chamber, the right end of the wiring part 12 is integrated with the left end of the overlapping plate 11, which is equivalent to the left end face of the overlapping plate 11 covering the liquid outlet 301 of the liquid chamber, so that the left end face of the overlapping plate 11 is in partial contact with the coolant at the liquid outlet 301 of the liquid chamber. Figure 7Specifically, the coolant enters the liquid chamber 30 through the liquid inlet 302. The coolant in the liquid chamber 30 flows into the longitudinal flow channel section 1003 through the two inner flow channel inlets 1001. Then, the coolant flowing through the longitudinal flow channel section 1003 gathers into the cross flow channel section 1004, and then the coolant is discharged from the inner flow channel outlet 1002. Because the wiring part 12 is located between the front and rear inner flow channel inlets 1001, coolant flows through the front and rear sides of the assembly of the wiring part 12 and the wire core end 991, so that the assembly of the wiring part 12 and the wire core end 991 gets a more uniform cooling effect.

[0034] Furthermore, such as Figure 6 and Figure 8 As shown, the cross-section of the inner flow channel 100 is a vertical elongated strip. To accommodate the installation space of the charging pile, with the length (along the left-right direction) and width (along the front-back direction) of the overlapping plate 11 set to a fixed value from a top-down perspective, the inner flow channel 100 should not be too wide because the overlapping plate 11 also needs to accommodate the mounting through holes 1101. That is, because the space available for arranging the inner flow channel 100 from a top-down perspective is small, in this embodiment, the cross-section of the inner flow channel 100 is set to a vertical elongated strip, resulting in a smaller width of the inner flow channel 100 from a top-down perspective, while the height dimension of the inner flow channel 100 in the vertical direction is larger. This allows the inner flow channel 100 to still have a large cross-sectional area, which is beneficial for allowing a larger flow rate of coolant to pass through it. Figure 6 As shown, since the cross-section of the inner flow channel 100 is a vertical strip, that is to say, the cross-section of the inner flow channel 100 extends in the vertical direction, which is beneficial to increasing the vertical range of heat absorption by the coolant.

[0035] Furthermore, such as Figures 1 to 5 As shown, the right end of the immersion box 3 is connected to the left end of the overlapping plate 11 by a first screw 31. A first sealing ring 7 is provided between the right end face of the immersion box 3 and the left end face of the overlapping plate 11. The inner flow channel inlet 1001 is located inside the first sealing ring 7, and the first screws 31 are distributed outside the first sealing ring 7. Figure 10 As shown, first screw mounting holes 303 are formed at the four corners of the right end of the immersion box 3, as... Figure 8 As shown, a first frame groove 1102 is formed on the left end face of the overlapping plate 11, that is, the first frame groove 1102 is a frame-shaped groove, such as... Figures 1 to 7As shown, the first sealing ring 7 is disposed within the first frame groove 1102, and the first screw 31 passes through the first screw mounting hole 303 and is screwed to the left end of the overlapping plate 11, thereby making the left end face of the overlapping plate 11 tightly adhere to the right end face of the immersion box 3. That is, the edge of the liquid outlet 301 contacts the first sealing ring 7, and the liquid outlet 301 is located within the corresponding range of the first sealing ring 7, thereby preventing coolant leakage between the immersion box 3 and the overlapping plate 11. Because the immersion box 3 and the overlapping plate 11 are connected by the first screw 31, the connection between the immersion box 3 and the overlapping plate 11 is stable and reliable.

[0036] Furthermore, such as Figure 10 As shown, a first protruding pin 32 is formed on the right end face of the immersion box 3, as... Figure 7 As shown, the first protruding pins 32 are located on the front and rear sides of the first sealing ring 7, that is, there are two first protruding pins 32. The first protruding pins 32 are adapted to the interlocking lap plate 11, specifically, as shown... Figure 8 As shown, a first positioning blind hole 1103 is formed on the left end face of the overlapping plate 11. The first positioning blind hole 1103 is located outside the first frame groove 1102. Specifically, the first protruding pin 32 is adapted to the corresponding first positioning blind hole 1103. Thus, the two first protruding pins 32 combine to prevent the overlapping plate 11 from rotating relative to the immersion box 3. The two first protruding pins 32 combine to prevent the overlapping plate 11 from shifting on the right end face of the immersion box 3, thereby further improving the connection reliability between the immersion box 3 and the overlapping plate 11.

[0037] Furthermore, such as Figures 1 to 7 As shown, the surround-cooled liquid-cooled terminal of the present invention also includes a connector seat 50. The connector seat 50 is mounted on the front side of the lap plate 11 by a second screw 51. The connector seat 50 has a connector seat inlet 501, which is aligned with and communicates with the inner flow channel outlet 1002. A liquid inlet 5 is formed on the connector seat 50, which communicates with the connector seat inlet 501. A second sealing ring 8 is provided between the connector seat 50 and the lap plate 11. The inner flow channel outlet 1002 is located inside the second sealing ring 8. The second screws 51 are distributed on the outside of the second sealing ring 8. Specifically, as shown... Figure 12 As shown, the connector seat 50 has a second screw mounting hole 502, which surrounds the outside of the liquid inlet 501 of the connector seat, as... Figure 8 As shown, the inner flow channel outlet 1002 is formed on the front side of the overlapping plate 11. A second frame groove 1104 is formed on the front side of the overlapping plate 11. The inner flow channel outlet 1002 is located inside the second frame groove 1104. The second screw 51 passes through the corresponding second screw mounting hole 502 and is screwed onto the overlapping plate 11, causing the connector seat 50 to tightly contact the front side of the overlapping plate 11. Because the connector seat inlet 501 is aligned with the inner flow channel outlet 1002, as... Figure 7As shown, the inlet 501 of the connector seat is located within the corresponding range of the second sealing ring 8, thereby preventing coolant leakage between the connector seat 50 and the front side of the lap plate 11. The fluid connector 5 can be a pagoda connector, that is, the outer wall of the fluid connector 5 has annular reverse teeth, and the end of the above-mentioned pipe is sleeved on the fluid connector 5, thereby connecting the above-mentioned pipe to the inner flow channel outlet 1002. Assuming that one end of the fluid connector 5 is directly welded to the lap plate 11 by brazing, the sealing reliability of the weld is difficult to control, and because there is stress in the weld, when the fluid connector 5 is impacted by a foreign object, the weld is prone to cracking, which may lead to coolant leakage; however, by setting the connector seat 50 to connect to the lap plate 11 by the second screw 51, and making the fluid connector 5 integrally formed on the connector seat 50 by casting, the hidden dangers caused by the stress of the welded structure are eliminated, and the second sealing ring 8 is used to achieve a more stable and reliable sealing connection between the connector seat 50 and the lap plate 11. The fluid connector 5 extends in the left and right direction.

[0038] Furthermore, such as Figure 12 As shown, a second protruding pin 52 is formed on the connector seat 50, and the second protruding pin 52 is located to the left of the second sealing ring 8, as shown. Figure 12 As shown, the second protruding pin 52 is distributed vertically, and the second protruding pin 52 is adapted to the right side of the interlocking plate 11, as shown. Figure 8 As shown, specifically, a second positioning blind hole 1105 is formed on the front side of the overlapping plate 11, and the second positioning blind hole 1105 is located on the left side of the second frame groove 1104. The second protruding pin 52 is adapted to connect to the corresponding second positioning blind hole 1105. There can be two second protruding pins 52. Thus, the upper and lower distributed second protruding pins 52 combine to prevent the overlapping plate 11 from rotating relative to the connector seat 50. The second positioning blind hole 1105 prevents the connector seat 50 from shifting on the front side of the overlapping plate 11, thereby further improving the connection reliability between the connector seat 50 and the overlapping plate 11. During the installation of the connector seat 50, the second sealing ring 8 is placed in the second frame groove 1104, and the side of the connector seat 50 with the second protrusion 52 is placed back against the front side of the overlapping plate 11, so that the second protrusion 52 is inserted into the corresponding second positioning blind hole 1105. At this time, each second screw mounting hole 502 is aligned with the screw hole on the front side of the overlapping plate 11. Then, each second screw 51 is installed. During this process, because the second protrusion 52 is located to the left of the second sealing ring 8, the relative position of the liquid inlet connector 5 and the overlapping plate 11 needs to be in accordance with the design requirements so that the second protrusion 52 can be inserted into the corresponding second positioning blind hole 1105, thus avoiding incorrect installation position of the liquid inlet connector 5.

[0039] Furthermore, such as Figures 1 to 7 As shown, the surround-cooled liquid-cooled terminal of the present invention also includes a sheath connector 2 for insertion into the end of the liquid-conducting sheath 98, such as... Figure 11As shown, one end of the sheathed connector 2 is integrally connected to the wire immersion box 3, and a connector cavity 21 for the conductive wire core 99 to pass through is formed inside the sheathed connector 2, as shown. Figure 6 and Figure 7 As shown, the connector cavity 21 is connected to the liquid inlet 302 of the liquid chamber. That is, the right end of the sheath connector 2 is integrated with the edge of the liquid inlet 302. A liquid passage gap is left between the inner wall of the connector cavity 21 and the conductive core 99, so that the coolant can enter the liquid chamber 30 from the cable cooling chamber 980 through the above-mentioned liquid passage gap. The sheath connector 2 can be a pagoda connector. The end of the liquid-passing sheath 98 is fitted onto the sheath connector 2. The sheath connector 2 slightly expands the end of the liquid-passing sheath 98, so that the end of the liquid-passing sheath 98 elastically expands and deforms slightly. Since the sheath connector 2 is integrated with the immersion box 3, the installation structure of the sheath connector 2 and the immersion box 3 is eliminated, which helps to simplify the installation steps of the liquid-cooled terminal.

[0040] Furthermore, such as Figure 8 As shown, the connector 12 is plate-shaped, and a welding surface 121 is formed on one side of the connector 12 for ultrasonic welding of the end 991 of the wire core in the form of a flat wire. The welding surface 121 can be the top of the connector 12, that is, because the conductive wire core 99 is a stranded wire with a cross-section that is approximately circular, such as Figure 7 As shown, before welding, the twisted structure of the wire core end 991 is untangled, allowing the wire core end 991 to unfold and transform into a flat wire shape. Then, the wire core end 991 is welded to the welding surface 121 using an ultrasonic welding process. For an example of ultrasonic welding equipment, please refer to the utility model patent publication number CN217290865U, "An Ultrasonic Welding Equipment". Because the ultrasonic welding process creates a metallurgical bonding layer between the wire core end 991 and the connector 12, it helps to reduce... The resistance of the assembly of the low-core end 991 and the terminal 12; the conductive core 99 is made of multiple copper wires twisted together. Since the core end 991 is spread out and then soldered to the terminal 12, the problem of poor heat dissipation of the copper wire in the center of the core end 99 due to its distance from the coolant is avoided. In other words, the core end 991, which is in the form of a flat wire, is soldered to the terminal 12, which enables the copper wire to obtain a more uniform heat dissipation effect.

[0041] like Figure 6As shown, during the installation of the liquid-cooled terminal of the present invention, the conductive wire core 99 is first passed through the sheath connector 2 and the liquid cavity 30 from left to right. The end of the liquid-conducting sheath 98 is then fitted onto the sheath connector 2. The wire core end 99 is then welded to the aforementioned wiring portion 12. The first sealing ring 7 is placed in the first frame groove 1102. The wire immersion box 3 is then moved to the right and placed against the left end face of the lap plate 11. At the same time, the wiring portion 12 will pass through the liquid cavity outlet 301, and the first protruding pin 32 will be inserted into the corresponding first positioning blind hole 1103. Then, the first screw 31 is installed, and the connector seat 50 is installed on the front side of the lap plate 11.

Claims

1. A surround-cooled liquid-cooled terminal, characterized in that: The device includes a conductive terminal body (1) and a wire immersion box (3). One end of the conductive terminal body (1) has a lap plate (11) located on one side of the wire immersion box (3). The other end of the conductive terminal body (1) has a connection portion (12) for electrically connecting the conductor end (991) of a conductive conductor (99). The wire immersion box (3) contains a liquid cavity (30) for accommodating the conductor end (991) and the connection portion (12). One end is formed with a liquid inlet (302) for connecting to the cable cooling chamber (980), and the other end of the immersion box (3) is formed with a liquid outlet (301). The wiring part (12) passes through the liquid outlet (301). The inside of the lap plate (11) is formed with a terminal internal flow channel (100). The internal flow channel (100) is formed with an internal flow channel inlet (1001) and an internal flow channel outlet (1002). The internal flow channel inlet (1001) is connected to the liquid outlet (301).

2. The surround-cooled liquid-cooled terminal according to claim 1, characterized in that: The overlapping plate (11) has a mounting through hole (1101) formed thereon, and the terminal inner flow channel (100) surrounds the outside of the mounting through hole (1101).

3. The surround-cooled liquid-cooled terminal according to claim 2, characterized in that: The overlapping plate (11) is fixed to the right side of the immersion box (3). The front left part and the rear left part of the overlapping plate (11) respectively form the inner flow channel inlet (1001). The wiring part (12) is located between the two inner flow channel inlets (1001). The inner flow channel (100) includes a longitudinal flow channel section (1003) and a transverse flow channel section (1004). The front and rear sides of the mounting through hole (1101) are respectively provided with the longitudinal flow channel. The crossflow section (1004) is located on the right side of the mounting through hole (1101). The left end of the longitudinal flow section (1003) is connected to the corresponding inner flow channel inlet (1001). The right end of the longitudinal flow section (1003) is connected to the crossflow section (1004). The inner flow channel outlet (1002) is formed at the right end of the overlapping plate (11). One end of the crossflow section (1004) is connected to the inner flow channel outlet (1002).

4. The surround-cooled liquid-cooled terminal according to claim 3, characterized in that: The cross-section of the inner flow channel (100) is a vertical strip.

5. The surround-cooled liquid-cooled terminal according to claim 3, characterized in that: The right end of the immersion box (3) is connected to the left end of the overlapping plate (11) by a first screw (31). A first sealing ring (7) is provided between the right end face of the immersion box (3) and the left end face of the overlapping plate (11). The inner flow channel inlet (1001) is located inside the first sealing ring (7). The first screw (31) is distributed outside the first sealing ring (7).

6. The surround-cooled liquid-cooled terminal according to claim 5, characterized in that: A first protruding pin (32) is formed on the right end face of the dip line box (3). The first protruding pin (32) is located on the front and rear sides of the first sealing ring (7). The first protruding pin (32) is adapted to be inserted into the overlapping plate (11).

7. The surround-cooled liquid-cooled terminal according to claim 3, characterized in that: It also includes a connector seat (50), which is installed on the front side of the overlapping plate (11) by a second screw (51). The connector seat (50) has a connector seat inlet (501) which is aligned with the inner flow channel outlet (1002). A liquid inlet (5) is formed on the connector seat (50), which is connected to the connector seat inlet (501). A second sealing ring (8) is provided between the connector seat (50) and the overlapping plate (11). The inner flow channel outlet (1002) is located inside the second sealing ring (8). The second screw (51) is distributed outside the second sealing ring (8).

8. The surround-cooled liquid-cooled terminal according to claim 7, characterized in that: A second protruding pin (52) is formed on the connector seat (50). The second protruding pin (52) is located on the left side of the second sealing ring (8). The second protruding pin (52) is distributed vertically and is adapted to be inserted into the right side of the lap plate (11).

9. The surround-cooled liquid-cooled terminal according to claim 1, characterized in that: It also includes a sheath connector (2) for insertion into the end of the liquid-conducting sheath (98), one end of which is integrally connected to the immersion box (3), and a connector cavity (21) is formed inside the sheath connector (2) for the conductive wire core (99) to pass through, and the connector cavity (21) is connected to the liquid inlet (302).

10. The surround-cooled liquid-cooled terminal according to claim 1, characterized in that: The wiring portion (12) is plate-shaped, and a welding surface (121) is formed on one side of the wiring portion (12) for ultrasonic welding of the end (991) of the wire core in the form of a flat wire.

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