阅读说明：本技术 一种充电用的液冷端子散热结构 (Liquid cooling terminal heat radiation structure for charging ) 是由 杜青林 徐文军 杨腾 肖飞 胡生 于 2021-09-28 设计创作，主要内容包括：本发明涉及充电连接器技术领域,具体指一种充电用的液冷端子散热结构,包括具有液流通道的套筒、连接于所述套筒的铜排、插接于铜排内的导芯,所述导芯呈圆柱状其一端部通过压接工艺直接连接于插接管的内端面,能够将充电过程中产生的热量实时传递给导芯,所述导芯整个浸没在冷却液中以增加了冷却浸没面积,导芯的热量与冷却液进行实时的热交换,冷却液经液冷管循环到外部降温,能够很好的解决压接区域的散热问题。(The invention relates to the technical field of charging connectors, in particular to a liquid cooling terminal heat dissipation structure for charging, which comprises a sleeve with a liquid flow channel, a copper bar connected to the sleeve and a guide core inserted in the copper bar, wherein one end of the guide core is cylindrical, and is directly connected to the inner end face of an insertion pipe through a crimping process, so that heat generated in the charging process can be transferred to the guide core in real time, the guide core is wholly immersed in cooling liquid to increase the cooling immersion area, the heat of the guide core and the cooling liquid perform real-time heat exchange, and the cooling liquid circulates to the outside through the liquid cooling pipe to cool, so that the heat dissipation problem of a crimping area can be well solved.)

1. The utility model provides a liquid cooling terminal heat radiation structure for charging usefulness of charging, including the sleeve that has flow channel, connect in telescopic copper bar, peg graft the core of leading in the copper bar, its characterized in that: the copper bar comprises an insertion part electrically connected with an external power supply component and an insertion pipe at least partially positioned in the liquid flow channel, the guide core is cylindrical, one end of the guide core is connected into the insertion pipe through a crimping process, a first liquid flow channel is formed between the insertion pipe and the guide core, a liquid passing hole is formed in the pipe wall of the insertion pipe, a second liquid flow channel is formed between the insertion pipe and part of the sleeve on the outer peripheral side, the first liquid flow channel is communicated with the second liquid flow channel through the liquid passing hole, and the second liquid flow channel is communicated with the liquid flow channel of the sleeve.

2. The liquid-cooled terminal heat dissipation structure for charging as defined in claim 1, wherein the liquid passing holes include a first liquid passing hole in a direction away from the end of the lead core connected to the copper bar and a second liquid passing hole in a direction close to the end of the lead core.

3. The liquid cooling terminal heat dissipation structure for charging as defined in claim 1 or 2, wherein the insertion tube is connected to a lining tube, the lining tube is at least partially sleeved in the sleeve, the guide core is coaxially sleeved in the lining tube, and a liquid flow gap penetrating the first liquid flow channel is formed between the guide core and the lining tube.

4. The liquid-cooled terminal heat dissipation structure for charging of claim 3, further comprising a liquid-cooled tube, a portion of which is sandwiched between the inner liner tube and the sleeve.

5. The liquid-cooled terminal heat dissipation structure for charging as defined in claim 4, wherein a wire-sealing ring is provided on the outer periphery of the liquid-cooled tube, and the wire-sealing ring is sandwiched between the liquid-cooled tube and the sleeve.

6. The liquid-cooled terminal heat dissipation structure for charging as defined in claim 5, 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 wire-sealing ring from slipping off.

7. The liquid cooling terminal heat dissipation structure for charging as defined in claim 4, wherein a tightening ring is provided around the outer circumference of the liquid cooling pipe.

8. The liquid cooled terminal heat sink structure for charging of claim 4, wherein the flow channel of said sleeve further comprises an outflow channel and a connecting channel between said outflow channel and said second flow channel, said outflow channel being in a direction opposite to that of said first flow channel, and a swivel is disposed in said outflow channel.

Technical Field

The invention relates to the field of charging cables, in particular to a liquid cooling terminal heat dissipation structure for charging.

Background

The new energy automobile replacing fuel oil automobile is a common consensus of all countries in the world, and with the continuous progress of scientific technology, the new energy automobile also develops rapidly towards the direction of light weight, integration and intellectualization. The requirements on the charging power and the charging speed are higher and higher, and for improving the charging speed and shortening the charging time, research needs to be carried out from the aspects of improving the charging voltage and the charging current, and the practical use requirements cannot be met by simply increasing the sectional area of a conductor and increasing the current-carrying capacity; reduce the cable specification and improve charging current and improve whole charging system's insulating nature simultaneously, ensure that the temperature rise satisfies the technical problem that safety standard becomes urgent to wait to solve among the charging process, prior art has also proposed high-power liquid cooling type charging gun at present, and the cooling tube is drawn forth from the conductor in the general liquid cooling cable, and the conductor carries out the crimping with the terminal, and the cooling only plays a role to the cable part, and the terminal crimping district still can the temperature height can not obtain the cooling. The conductor is accelerated to age when being in a high-temperature state for a long time, so that the service life is shortened, and the failure rate is increased. The current is a main factor influencing the temperature rise, and the magnitude of the current has to be limited because the temperature is too high. In an actual cooling cycle, the efficiency is low, and the heat dissipation is slow, so that the upper limit of the current during high-power charging is limited; how to quickly take away the heat of the terminal crimping area and the contact area and reduce the temperature becomes a technical difficulty of the whole circulating system.

Disclosure of Invention

The invention aims to solve the defect of poor heat dissipation of the conventional liquid cooling terminal, and provides a liquid cooling terminal heat dissipation structure for charging

In order to achieve the above object, the present invention provides a liquid cooling 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 in the copper bar, wherein the copper bar includes an insertion portion electrically connected to an external power supply component and an insertion tube at least partially located in the liquid flow channel, one end of the guide core is connected to the insertion tube through a crimping process, a first liquid flow channel is formed between the insertion tube and the guide core, a liquid passing hole is formed on a tube wall of the insertion tube, a second liquid flow channel is formed between the insertion tube and a part of the sleeve on an outer peripheral side, the first liquid flow channel is communicated with the second liquid flow channel through the liquid passing hole, and the second liquid flow channel is communicated with the liquid flow channel of the sleeve.

Preferably, the liquid passing holes comprise a first liquid passing hole far away from the end part direction of the connection between the guide core and the copper bar and a second liquid passing hole close to the end part direction of the guide core.

Preferably, the insertion pipe is connected with a lining pipe, at least part of the lining pipe is sleeved in the sleeve, the guide core is sleeved in the lining pipe in a coaxial manner, and a liquid flow gap communicated with the first liquid flow channel is formed between the guide core and the lining pipe.

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.

Preferably, a wire sealing ring is arranged on the outer periphery of the liquid cooling pipe, and the wire sealing ring is clamped between the liquid cooling pipe and the sleeve.

Preferably, the sleeve is further connected with a tail screw cap, and the tail screw cap is sleeved on the liquid cooling pipe and connected with the sleeve to prevent the wire sealing ring from sliding off.

Preferably, a hoop is sleeved on the outer periphery of the liquid cooling pipe.

Preferably, the flow passage of the sleeve further includes an outflow passage and a connection passage between the outflow passage and the second flow passage, the outflow passage being in a direction opposite to that of the first flow passage, and a junction is provided in the outflow passage.

The liquid cooling terminal heat dissipation structure for charging comprises a sleeve with a liquid flow channel, a copper bar connected to the sleeve and a guide core inserted in the copper bar, wherein one end of the guide core is cylindrical, and is directly connected to the inner end face of an insertion pipe through a crimping process, so that heat generated in the charging process can be transferred to the guide core in real time, the guide core is wholly immersed in cooling liquid to increase the cooling immersion area, the heat of the guide core and the cooling liquid perform real-time heat exchange, and the cooling liquid is circulated to the outside through the liquid cooling pipe to cool, so that the heat dissipation problem of a crimping area can be well solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a liquid cooling terminal heat dissipation structure according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the liquid cooling terminal heat dissipation structure for charging of FIG. 1;

fig. 3 is an exploded view of the liquid cooling terminal heat dissipation structure for charging of the present invention shown in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the liquid cooling terminal heat dissipation structure for charging according to the present invention is used in a charging socket of a new energy electric vehicle, and is connected to a plug terminal or a socket of a power supply unit to realize charging. The liquid cooling terminal heat dissipation structure for charging of the invention comprises a sleeve 106 with a liquid flow channel, a copper bar 101 connected with the sleeve 106, a guide core 112 inserted in the copper bar 101, a lining pipe 107 and a liquid cooling pipe 111. In this embodiment, the sleeve 106 includes two parts, namely, a cylindrical main body portion 106A and a convex base portion 106B on the main body portion 106A. The copper bar 101 is attached to one end of the main body 106A, and the other end of the main body 106A is in the direction of introduction of the liquid flow channel, and the liquid flow channel penetrates the base portion 106B and is led out. In the present embodiment, the leading-out direction of the liquid flow channel from the base portion 106B is opposite to the leading-in direction, but this is not limited to the case where the leading-out direction is different from the leading-in direction. In the present invention, the direction of discharge of the liquid flow channel of the base portion 106B is set according to actual product requirements. In this embodiment, the base portion 106B is provided with a hollow adapter 115. Adapter 115 is fixedly connected to sleeve 106 by a gasket 116 and a nut. The excess opening in the base 106B is closed by the sealing ring 104 and the cover 105. The sealing ring is generally made of elastic rubber or plastic material.

The copper bar 101 comprises a plug-in part 101B electrically connected with an external power supply component and a plug-in pipe 101A at least partially positioned in the liquid flow channel. The plug part 101B and part of the connection region of the plug tube 101A are screwed onto the sleeve 106. The insertion tube 101A is cylindrical, and an inner surface portion connected to the insertion portion 101B is an inner end surface that is substantially perpendicular to the central axis of the insertion tube 101A. In order to increase the area of the guide core 112 submerged by the coolant to the maximum, the guide core 112 has a cylindrical shape, and one end portion 112A thereof is connected to the inner end surface inside the bayonet tube 101A by a crimping process. In this embodiment, the end surface of the end portion 112A of the guide core 112 and the inner end surface inside the bayonet tube 101A are connected by a crimping process. The cooling fluid is preferably an insulating fluid with good heat-conducting properties, for example transformer oil, capacitor oil, cable oil, silicone oil or mineral oil can be used. The inner diameter of the insertion tube 101A is larger than the outer diameter of the guide core 112, and a first fluid flow channel is formed between the insertion tube 101A and the guide core 112. The pipe wall of the insertion pipe 101A is provided with a liquid passing hole, a second liquid flow channel is formed between the insertion pipe 101A and a part of the sleeve 106 on the outer peripheral side, the first liquid flow channel is communicated with the second liquid flow channel through the liquid passing hole, and the second liquid flow channel is communicated with the liquid flow channel of the sleeve 106. In the embodiment of the present invention, the copper bar 101 and the conductive core 112 are made of a metal conductive material, such as copper alloy or pure copper, and generally need to be surface-treated with nickel plating, silver plating, etc. The external shape of the sleeve 106 can be designed according to actual requirements, and only needs to be adapted to a corresponding socket, and most of the sleeves are cylindrical in practical application.

In the embodiment, the liquid passing holes comprise a first liquid passing hole 101D far away from the end 112A of the guide core 112 connected with the copper bar 101, and a second liquid passing hole 101C close to the area of the end 112A of the guide core 112. The coolant in the first flow channel can flow into the second flow channel through the first liquid passing hole 101D and the second liquid passing hole 101C, and the crimping area of the core 112 and the copper bar 101 is completely immersed in the coolant, so that the maximum amount of heat can be removed.

In addition, the inserting pipe 101A of the copper bar 101 is connected with a lining pipe 107 through a threaded connection manner, at least a part of the lining pipe 107 is sleeved in the sleeve 106, the guide core 112 is sleeved in the lining pipe 107, and the guide core 112, the lining pipe 107, the inserting pipe 101A and the main body portion 106A of the sleeve 106 are coaxially arranged. A liquid flow gap communicated with the first liquid flow channel is formed between the guide core 112 and the lining pipe 107.

The liquid cooling terminal heat dissipation structure for charging further comprises a liquid cooling pipe 111, and a part of the liquid cooling pipe 111 is sandwiched between the lining pipe 107 and the sleeve 106. The liquid cooling tube 111 is preferably made of a flexible material having a good insulation property, such as a flexible rubber tube or a flexible plastic tube. Specifically, the liquid cooling pipe 111 is sleeved on the lining pipe 107. The inner diameter of the liquid-cooled tube 111 is significantly larger than the outer diameter of the core 112, and a gap 111A is formed between the liquid-cooled tube 111 and the core 112 and communicates with the first liquid flow path. The cooling fluid is introduced from the fluid cooling tube 111, flows through the first fluid passage, through the first fluid passage hole 101D and the second fluid passage hole 101C to completely submerge the wick 112, flows into the second fluid passage, and flows out of the fluid passage introduced into the base 106B to the hollow adapter 115.

In order to prevent the coolant from leaking inside the sleeve 106, one end of the coolant pipe 111 is interposed between the liner pipe 107 and the main body portion 106A of the sleeve 106 and is in close communication with the second coolant. The main body 106A has a projection which abuts against the end region of the liquid cooling pipe 111. The projections hold the end regions of the liquid-cooled tube 111 in compression on the lining tube 107. Further, a wire-sealing ring 108 is provided around the outer periphery of the liquid-cooling pipe 111, and the wire-sealing ring 108 is sandwiched between the liquid-cooling pipe 108 and the body portion 106A of the sleeve, thereby further preventing leakage of the cooling liquid.

The sleeve is also connected with a tail nut 110 which is sleeved on the liquid cooling pipe and connected with the sleeve to prevent the wire sealing ring 108 from sliding off. Furthermore, a pressing ring 113 is arranged on the wire sealing ring 108, and the pressing ring 113 presses the wire sealing ring 108 to seal the gap of the end area of the liquid cooling pipe 111 under the action of the tail nut 110 so as to achieve the sealing effect.

A tightening ring 109 is sleeved on the outer periphery of the liquid cooling pipe 111, so that the liquid cooling pipe 111 is firmly fixed on the lining pipe 107 to prevent the liquid cooling pipe 111 from being pulled by a large force and falling off in the using process.

According to the liquid cooling terminal heat dissipation structure for charging, the guide core is wholly immersed in the cooling liquid to increase the cooling immersion area, the heat of the guide core and the cooling liquid perform real-time heat exchange, and the cooling liquid circulates to the outside through the liquid cooling pipe to cool, so that the heat dissipation problem of a crimping area can be well solved. The invention carries out better design on the core heat-conducting piece, effectively improves the cooling efficiency and eliminates the short circuit risk.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.