A liquid-cooled terminal heat dissipation structure for charging

Abstract

The present invention relates to the technical field of charging connectors, and specifically refers to a liquid-cooled terminal heat dissipation structure for charging, which includes a sleeve having a liquid flow channel, a copper bar connected to the sleeve, and a guide core inserted into the copper bar. The guide core is cylindrical, and one end thereof is directly connected to the inner end face of the insertion tube through a crimping process, capable of transferring the heat generated during charging to the guide core in real time. The entire guide core is immersed in the coolant to increase the cooling immersion area, and the heat of the guide core exchanges heat with the coolant in real time. The coolant circulates through the liquid-cooled tube to the outside for cooling, and can well solve the heat dissipation problem of the crimping area.

Description

Technical Field

[0001] The present invention relates to the field of charging cables, and particularly to a liquid-cooled terminal heat dissipation structure for charging. Background Art

[0002] It has been a common consensus around the world to replace fuel vehicles with new energy vehicles. With the continuous progress of science and technology, new energy vehicles are also developing rapidly towards lightweight, integrated, and intelligent directions. The requirements for charging power and charging speed are getting higher and higher. To improve the charging speed and shorten the charging time, it is necessary to study from the aspects of increasing the charging voltage and charging current. Simply increasing the cross-sectional area of the conductor to increase the current-carrying capacity cannot meet the actual usage requirements; reducing the cable specifications while increasing the charging current and improving the insulation of the entire charging system to ensure that the temperature rise during charging meets the safety standards has become a technical problem to be solved urgently. At present, the existing technology has also proposed high-power liquid-cooled charging guns. Generally, in a liquid-cooled cable, the cooling pipe is led out from the conductor, and the conductor is crimped to the terminal. The cooling only acts on the cable part, and the terminal crimping area cannot be cooled and still has a high temperature. When the conductor is in a high-temperature state for a long time, it will accelerate aging, resulting in a reduced service life and an increased failure rate. As the current is the main factor affecting the temperature rise, the current size often has to be limited due to the too high temperature. In the actual cooling cycle, the efficiency is low and the heat dissipation is slow, thus limiting the upper limit of the current during high-power charging; how to quickly remove the heat from the terminal crimping area and the contact area and reduce the temperature has become a technical difficulty in the entire circulation system. Summary of the Invention

[0003] The purpose of the present invention is to solve the defect of poor heat dissipation of the existing liquid-cooled terminal, and to provide a liquid-cooled terminal heat dissipation structure for charging.

[0004] To achieve the above purpose, the present invention provides a liquid-cooled terminal heat dissipation structure for charging, including a sleeve having a liquid flow channel, a copper bar connected to the sleeve, and a guide core inserted into the copper bar. The copper bar includes a plug-in portion electrically connected to an external power supply component and an insertion tube at least partially located in the liquid flow channel. The guide core is cylindrical, and one end thereof is connected to the insertion tube by a crimping process. A first liquid flow channel is formed between the insertion tube and the guide core. Liquid passing holes are provided on the tube wall of the insertion tube. A second liquid flow channel is formed between the insertion tube and a part of the sleeve on the outer peripheral side. The first liquid flow channel communicates with the second liquid flow channel through the liquid passing holes, and the second liquid flow channel communicates with the liquid flow channel of the sleeve.

[0005] Preferably, the liquid passing holes include a first liquid passing hole away from the end direction of the connection between the guide core and the copper bar, and a second liquid passing hole close to the end direction of the guide core.

[0006] Preferably, the insertion pipe is connected to a lining pipe, at least a part of the lining pipe is sleeved in the sleeve, the guide core is coaxially arranged in the lining pipe, and a liquid flow gap communicating with the first liquid flow channel is formed between the guide core and the lining pipe.

[0007] Preferably, the liquid cooling terminal heat dissipation structure for charging further includes a liquid cooling pipe, and a part of the liquid cooling pipe is clamped between the lining pipe and the sleeve.

[0008] Preferably, a sealing ring is arranged on the outer peripheral side of the liquid cooling pipe, and the sealing ring is clamped between the liquid cooling pipe and the sleeve.

[0009] Preferably, a tail nut is further connected to the sleeve, and the tail nut is sleeved on the liquid cooling pipe and connected to the sleeve to prevent the sealing ring from slipping off.

[0010] Preferably, a tightening ring is sleeved on the outer peripheral side of the liquid cooling pipe.

[0011] Preferably, the liquid flow channel of the sleeve further includes an outflow channel and a connection channel located between the outflow channel and the second liquid flow channel. The direction of the outflow channel is opposite to that of the first liquid flow channel, and an adapter is arranged in the outflow channel.

[0012] The liquid cooling terminal heat dissipation structure for charging of the present invention includes a sleeve with a liquid flow channel, a copper bar connected to the sleeve, and a guide core inserted into the copper bar. The guide core is cylindrical, and one end of it is directly connected to the inner end face of the insertion pipe through a crimping process, which can transfer the heat generated during charging to the guide core in real time. The whole guide core is immersed in the coolant to increase the cooling immersion area. The heat of the guide core exchanges heat with the coolant in real time, and the coolant circulates through the liquid cooling pipe to the outside for cooling, which can well solve the heat dissipation problem of the crimping area. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0014] Figure 1 It is a three-dimensional structure schematic diagram of an embodiment of the liquid cooling terminal heat dissipation structure for charging of the present invention;

[0015] Figure 2 For the appendix Figure 1 It is a cross-sectional schematic diagram of the liquid cooling terminal heat dissipation structure for charging of the present invention in the appendix;

[0016] Figure 3 For the appendixFigure 1 Explosion structure schematic diagram of the liquid-cooled terminal heat dissipation structure for charging in the present invention. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Refer to Figure 1 To Figure 3 As shown, it is the liquid-cooled terminal heat dissipation structure for charging in the present invention. It is used for the charging socket of a new energy electric vehicle and is connected to the plug-in terminal or socket of the power supply component to achieve charging. The liquid-cooled terminal heat dissipation structure for charging in the present invention includes a sleeve 106 having a liquid flow channel, a copper bar 101 connected to the sleeve 106, a guide core 112 inserted into the copper bar 101, a lining tube 107, and a liquid-cooled tube 111. In this embodiment, the sleeve 106 includes two parts, namely a cylindrical main body part 106A and a raised base part 106B located on the main body part 106A. The copper bar 101 is installed at one end of the main body part 106A, and the other end of the main body part 106A is the introduction direction of the liquid flow channel, and the liquid flow channel penetrates through the base part 106B and then exits. In this embodiment, the exit direction of the liquid flow channel from the base part 106B is opposite to the introduction direction, but this does not limit that its exit direction must be different from the introduction direction. In the present invention, the exit direction of the liquid flow channel of the base part 106B is set according to the actual product requirements. In this embodiment, a hollow adapter 115 is provided on the base part 106B. The adapter 115 is fixedly connected to the sleeve 106 through a sealing ring 116 and a nut. The redundant openings on the base 106B are closed by a sealing ring 104 and a cover 105. The sealing ring is generally made of elastic rubber or plastic material.

[0019] The copper busbar 101 includes a plug-in portion 101B electrically connected to an external power component and a plug-in tube 101A at least partially located within the liquid flow channel. A portion of the connection region between the plug-in portion 101B and the plug-in tube 101A is threadedly connected to the sleeve 106. The plug-in tube 101A is cylindrical, and the inner surface portion connected to the plug-in portion 101B is an inner end face, which is substantially perpendicular to the central axis of the plug-in tube 101A. In order to maximize the area where the guide core 112 is immersed in the coolant, the guide core 112 is cylindrical, and one end portion 112A thereof is connected to the inner end face within the plug-in tube 101A by a crimping process. In this embodiment, the end face of one end portion 112A of the guide core 112 is connected to the inner end face within the plug-in tube 101A by a crimping process. The coolant is preferably an insulating liquid with good heat conduction performance, such as transformer oil, capacitor oil, cable oil, silicone oil, or mineral oil, etc. The inner diameter of the plug-in tube 101A is larger than the outer diameter of the guide core 112, and a first liquid flow channel is formed between the plug-in tube 101A and the guide core 112. Liquid passing holes are provided on the tube wall of the plug-in tube 101A, and a second liquid flow channel is formed between the plug-in tube 101A and a partial sleeve 106 on the outer peripheral side. The first liquid flow channel communicates with the second liquid flow channel through the liquid passing holes, and the second liquid flow channel communicates with the liquid flow channel of the sleeve 106. In the embodiment of the present invention, both the copper busbar 101 and the guide core 112 are made of a metal conductive material, such as a copper alloy or pure copper, and generally need to be surface-treated, such as nickel plating or silver plating. The external shape of the sleeve 106 can be designed according to actual needs as long as it is adapted to the corresponding socket. In actual applications, it is mostly cylindrical.

[0020] In this embodiment, the liquid passing holes include a first liquid passing hole 101D located away from the end portion 112A where the guide core 112 is connected to the copper busbar 101, and a second liquid passing hole 101C close to the region of the end portion 112A of the guide core 112. The coolant in the first liquid flow channel can flow into the second liquid flow channel through the first liquid passing hole 101D and the second liquid passing hole 101C, so that the crimping region between the guide core 112 and the copper busbar 101 is completely immersed in the coolant, and the heat can be taken away in the largest amount.

[0021] In addition, the plug-in tube 101A of the copper busbar 101 is connected to a lining tube 107 by a threaded connection method. The lining tube 107 is at least partially sleeved within the sleeve 106. The guide core 112 is sleeved within the lining tube 107. The guide core 112, the lining tube 107, the plug-in tube 101A, and the main body portion 106A of the sleeve 106 are coaxially arranged. A liquid flow gap communicating with the first liquid flow channel is formed between the guide core 112 and the lining tube 107.

[0022] The liquid cooling terminal heat dissipation structure for charging further includes a liquid cooling pipe 111, and a part of the liquid cooling pipe 111 is clamped between the inner lining pipe 107 and the sleeve 106. The liquid cooling pipe 111 is generally preferably made of a flexible material with good insulation properties, such as a flexible rubber pipe or a flexible plastic pipe. Specifically, the liquid cooling pipe 111 is sleeved on the inner lining pipe 107. The inner diameter of the liquid cooling pipe 111 is obviously larger than the outer diameter of the guide core 112, so a gap 111A is formed between the liquid cooling pipe 111 and the guide core 112 and communicates with the first liquid flow channel. The coolant is introduced from the liquid cooling pipe 111, flows through the first liquid flow channel, passes through the first liquid passing hole 101D and the second liquid passing hole 101C to completely immerse the guide core 112, flows into the second liquid flow channel, and flows out through the liquid flow channel in the base 106B to the hollow adapter 115.

[0023] To prevent the coolant from leaking inside the sleeve 106, one end of the liquid cooling pipe 111 is clamped between the inner lining pipe 107 and the main body part 106A of the sleeve 106 and is adjacent to the second liquid flow. A protrusion is provided inside the main body part 106A and abuts against the end area of the liquid cooling pipe 111. The protrusion presses and fixes the end area of the liquid cooling pipe 111 on the inner lining pipe 107. Further, a wire sealing ring 108 is also sleeved on the outer peripheral side of the liquid cooling pipe 111, and the wire sealing ring 108 is clamped between the liquid cooling pipe 108 and the main body part 106A of the sleeve to further prevent the leakage of the coolant.

[0024] A tail nut 110 is also connected to the sleeve. The tail nut is sleeved on the liquid cooling pipe and connected to the sleeve to prevent the wire sealing ring 108 from slipping off. Further, a pressing ring 113 is provided on the wire sealing ring 108. The pressing ring 113 forces the wire sealing ring 108 to seal the gap in the end area of the liquid cooling pipe 111 under the action of the tail nut 110 to achieve a sealing effect.

[0025] A tightening ring 109 is sleeved on the outer peripheral side of the liquid cooling pipe 111 to firmly fix the liquid cooling pipe 111 on the inner lining pipe 107 to prevent the liquid cooling pipe 111 from being pulled out forcefully and falling off during use.

[0026] In the liquid cooling terminal heat dissipation structure for charging of the present invention, the entire guide core is immersed in the coolant to increase the cooling immersion area. The heat of the guide core is exchanged with the coolant in real time, and the coolant is circulated through the liquid cooling pipe to be cooled externally, which can well solve the heat dissipation problem of the crimping area. The present invention has a better design for the core heat conducting part, effectively improving the cooling efficiency and eliminating the risk of short circuit.

[0027] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A liquid-cooled terminal heat dissipation structure for charging, comprising a sleeve having a liquid flow channel, a copper bar connected to the sleeve, and a guide core inserted into the copper bar, characterized in that: The copper busbar includes a plugging part electrically connected to an external power component and an insertion tube at least partially located in the liquid flow channel. The guide core is cylindrical, and one end thereof is connected to the inside of the insertion tube by a crimping process. A first liquid flow channel is formed between the insertion tube and the guide core. Liquid passing holes are provided on the tube wall of the insertion tube. A second liquid flow channel is formed between the insertion tube and a partial sleeve on the outer peripheral side. The first liquid flow channel communicates with the second liquid flow channel through the liquid passing holes, and the second liquid flow channel communicates with the liquid flow channel of the sleeve; The insertion tube is connected to a lining tube, and the lining tube is at least partially sleeved in the sleeve. The guide core is coaxially arranged inside the lining tube and forms a liquid flow gap communicating with the first liquid flow channel between the guide core and the lining tube; The liquid-cooled terminal heat dissipation structure for charging further includes a liquid-cooled tube, and a part of the liquid-cooled tube is clamped between the lining tube and the sleeve; The liquid passing holes include a first liquid passing hole away from the end direction of the connection between the guide core and the copper busbar, and a second liquid passing hole close to the end direction of the guide core; The coolant in the first liquid flow channel can flow into the second liquid flow channel through the first liquid passing hole and the second liquid passing hole, and the crimping area between the guide core and the copper busbar is completely immersed in the coolant.

2. The liquid-cooled terminal heat dissipation structure for charging according to claim 1, wherein, A sealing ring is provided on the outer peripheral side of the liquid-cooled tube, and the sealing ring is clamped between the liquid-cooled tube and the sleeve.

3. The liquid-cooled terminal heat dissipation structure for charging according to claim 2, wherein A tail nut is further connected to the sleeve, and the tail nut is sleeved on the liquid-cooled tube and connected to the sleeve to prevent the sealing ring from slipping off.

4. The liquid-cooled terminal heat dissipation structure for charging according to claim 1, characterized in that, A tightening ring is sleeved on the outer peripheral side of the liquid-cooled tube.

5. The liquid-cooled terminal heat dissipation structure for charging according to claim 1, wherein, The liquid flow channel of the sleeve further includes an outflow channel and a connection channel located between the outflow channel and the second liquid flow channel. The direction of the outflow channel is opposite to the direction of the first liquid flow channel, and a connector is arranged in the outflow channel.

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