A charging circuit cooling structure

Abstract

The present invention discloses a charging circuit cooling structure, comprising a fixing part and two jack terminals sealed and inserted in the fixing part for connecting with a cable, a guide tube for the flow of cooling medium is arranged in the cable, a slot hole with one end being open is arranged in the axial middle of the jack terminal, a plug pin connected to the guide tube is arranged in the slot hole, a through hole connected to the guide tube is arranged in the axial middle of the plug pin, a gap connected to the through hole is arranged between the front end of the plug pin and the slot hole, a flow hole connected to the slot hole is arranged on the opposite side of the two jack terminals, and a flow channel connected to the two flow holes is arranged on the fixing part; a first sealing ring is arranged between the guide tube and the plug pin, and a second sealing ring is arranged between the rear end of the plug pin and the jack terminal. The charging circuit cooling structure of the present invention has good heat dissipation performance and sealing performance, and has the characteristics of simple structure, compactness, safety and reliability, and easy assembly.

Description

Technical Field

[0001] The invention relates to the field of connectors, and in particular to a charging circuit cooling structure. Background Art

[0002] With the increasing popularity of electric vehicles, charging equipment for this type of vehicle has become the core technology of this industry; and the charging connector of an electric vehicle is an important component of the charging equipment. When charging an electric vehicle for a long time, the terminals at the charging connection will generate a certain amount of heat due to the relatively large charging current, and the original charging connector structure is tightly arranged and not easy to dissipate heat. If charging is done for a long time, the contact resistance of the charging connection terminal will increase and the temperature rise will increase, thereby affecting the performance of the terminal; continuous heating will also cause aging of plastic parts, and eventually lead to the risk of burning of the charging connector; therefore, the market urgently needs to solve the heat dissipation problem of the charging connection terminal. However, with the continuous development of new energy vehicles, the heat dissipation structure of the existing charging connection terminal can no longer meet the requirements, and the heat dissipation structure has poor sealing and poor leakage prevention performance. Summary of the invention

[0003] In view of the above-mentioned existing technical defects, the present invention provides a charging circuit cooling structure with good heat dissipation performance and sealing performance, which has the characteristics of simple and compact structure, safety and reliability, and easy assembly.

[0004] In order to solve the above technical problems, the present invention provides a charging circuit cooling structure, comprising a fixing part and two jack terminals sealed and penetrated in the fixing part for connecting with a cable, the cable is provided with a guide tube for the flow of cooling medium, a slot hole with an open end is provided in the axial middle of the jack terminal, a pin connected to the guide tube is provided in the slot hole, a through hole connected to the guide tube is provided in the axial middle of the pin, a gap connected to the through hole is provided between the front end of the pin and the slot hole, a flow hole connected to the slot hole is provided on the opposite sides of the two jack terminals, and a flow channel connecting the two flow holes is provided on the fixing part; a first sealing ring is provided between the guide tube and the pin, and a second sealing ring is provided between the rear end of the pin and the jack terminal.

[0005] Furthermore, the fixing part is provided with two fixing holes for installing the socket terminal, a third sealing ring and a fourth sealing ring are provided between the socket terminal and the fixing part, and the third sealing ring and the fourth sealing ring are respectively placed on both sides of the flow hole.

[0006] Furthermore, the fixing part includes a front cover and a rear cover that are interlocked, the third sealing ring is arranged between the socket terminal and the front cover, the fourth sealing ring is arranged between the socket terminal and the rear cover, and a fifth sealing ring is arranged between the front cover and the rear cover, and the flow channel is arranged between the front cover and the rear cover and placed in the fifth sealing ring.

[0007] Furthermore, a groove communicating with the fixing hole is provided on the end surface of the front cover and / or the rear cover to form the flow channel.

[0008] Furthermore, the rear cover is provided with a plurality of buckling parts extending forward, the buckling parts are provided with card slots, the outer periphery of the front cover is provided with a receiving groove for accommodating the buckling parts, and the receiving groove is provided with a buckle that cooperates with the card slot; the rear end face of the front cover is provided with a raised positioning column, and the front end face of the rear cover is provided with a positioning hole that cooperates with the positioning column.

[0009] Furthermore, a fixing panel for pressing the jack terminal inwards is provided at the rear end of the fixing portion.

[0010] Furthermore, a stop step is provided at the rear end of the fixing hole, a ring platform is provided on the outer peripheral protrusion at the rear end of the socket terminal to cooperate with the stop step, and a flange is extended forward at the front end of the fixing panel to be inserted into the fixing hole, and the front end surface of the flange abuts against the rear end surface of the ring platform.

[0011] Furthermore, the cable includes a guide tube, a copper layer and an insulating layer from the inside to the outside, the guide tube is crimped into the through hole in the middle of the pin, and the copper layer is crimped between the pin and the socket terminal.

[0012] Furthermore, the first sealing ring is sleeved on the outer side of the end of the flow guide tube, and a plurality of raised annular bosses are provided on the outer periphery of the first sealing ring, and the outer periphery of the annular bosses abuts against the inner wall of the through hole.

[0013] Furthermore, the outer periphery of the jack terminal is provided with two annular grooves for respectively fitting the third sealing ring and the fourth sealing ring; and the fixed panel is fixed to the fixing portion by screws.

[0014] The present invention has the following beneficial effects:

[0015] The present invention arranges a guide tube on the cable, and arranges a pin in the jack terminal to cooperate with the guide tube, so that the cooling medium can flow into the entire slot in the jack terminal. In this way, when the cooling medium flows, the coolant is evenly distributed on the inner and outer surfaces of the pin, and the pin, the jack terminal and the heating position of the cable can be completely covered, so that the cooling effect is excellent. The fluidity of the cooling medium is used to quickly take away the heat inside the pin, the jack and the cable, so as to achieve the purpose of cooling, so that the performance of the jack terminal is maintained in the best state, and the charging circuit can work stably in harsh environments; the panel is fixed to press the jack terminal, so as to improve the connection reliability of the jack structure. The invention is convenient for assembly, and the fixed part is divided into an interlocking front cover and a rear cover, which is convenient for processing the internal flow channel and assembling the whole structure. The cooperation of the positioning posts and the positioning holes respectively arranged on the front cover and the rear cover has a fool-proof effect, and is convenient for the alignment, plugging, locking and fixing of the front cover and the rear cover. The first sealing ring and the second sealing ring are used to ensure the sealing between the jack terminal, the pin and the cable, and the third to fifth sealing rings are used to ensure the sealing between the jack terminal and the fixed part, so that leakage can be effectively avoided, and the anti-leakage effect is excellent. The invention also has the characteristics of simple and compact structure, safety and reliability, and low cost.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It is an exploded schematic diagram of the charging circuit cooling structure in the embodiment;

[0019] Figure 2 is a schematic diagram of a first sealing ring in the embodiment;

[0020] Figure 3 is a schematic diagram of a jack terminal in an embodiment;

[0021] Figure 4 is an exploded schematic diagram of a fixing portion in an embodiment;

[0022] Figure 5 2 is a cross-sectional view of a charging circuit cooling structure in an embodiment. DETAILED DESCRIPTION

[0023] In order to more fully understand the technical content of the present invention, the present invention will be further introduced and explained in conjunction with the accompanying drawings and specific embodiments below; it should be noted that the descriptions of "first", "second", etc. in this article are used to distinguish different components, etc., do not represent the order of precedence, nor do they limit the "first" and "second" to be different types.

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 skilled in the art without making creative work are within the scope of protection of the present invention.

[0025] Example

[0026] like Figures 1 to 5 As shown, a charging circuit cooling structure shown in this embodiment includes a fixing part 1 and two socket terminals 3 sealed and penetrated in the fixing part 1 for connecting with the cable 2. A guide tube 21 for the flow of cooling medium is provided in the middle of the cable 2. Specifically, the cable 2 includes the guide tube 21, the copper layer 22 and the insulating layer 23 from the inside to the outside. A slot 31 with an open rear end is provided in the axial middle of the socket terminal 3. A pin 4 connected to the guide tube 21 is provided in the slot 31. A through hole 41 connected to the guide tube 21 is provided in the axial middle of the pin 4. The front end of the pin 4 extends to the bottom of the slot 31, and a gap connected to the through hole 41 is provided between the front end and the surrounding of the pin 4 and the slot 31 for the flow of cooling medium. The two socket terminals 3 are provided with a flow hole 32 connected to the internal slot 31 on the opposite sides. The fixing part 1 is provided with The flow channel 11 connecting the two flow holes 32 connects the slots in the two jack terminals, and further connects the guide tubes in the two cables respectively connected to the two jack terminals, so that the cooling medium flows into one guide tube, passes through the two jack terminals in sequence, and then flows out from the other guide tube; a first sealing ring 51 is provided between the guide tube 21 and the pin 4, and a second sealing ring 52 is provided between the rear end of the pin 4 and the jack terminal 3. The flow hole 32 and the flow channel 11 are located on the inner side of the second sealing ring 52 and away from the front end of the pin, so that the cooling medium flows into the bottom of the slot after passing through the guide tube and the pin, and then flows back from the bottom of the slot through the gap to the flow hole, and then passes through the flow hole and the flow channel in sequence to flow into the slot of the other jack terminal, and then flows to the bottom of the slot, enters the through hole of the pin, and flows out through the guide tube of the cable (such as Figure 5As shown); in the above, when the cooling medium flows, the coolant is evenly distributed on the inner and outer surfaces of the pin, and the pin, the socket terminal and the heating position of the cable can be completely covered, and the cooling effect is excellent. The fluidity of the cooling medium is used to quickly take away the heat inside the pin, the socket and the cable, so as to achieve the purpose of cooling, so that the performance of the socket terminal is maintained in the best state, and the charging circuit can work stably in harsh environments. The first sealing ring and the second sealing ring are used to ensure the sealing between the socket terminal, the pin and the cable.

[0027] The fixing portion 1 is provided with two parallel fixing holes 12 for mounting two socket terminals 3 respectively, and a third sealing ring 53 and a fourth sealing ring 54 are provided between the socket terminal 3 and the fixing portion 1, and the third sealing ring 53 and the fourth sealing ring 54 are respectively placed on both sides of the flow hole 32, thereby sealing the flow hole and the flow channel, and ensuring the sealing between the fixing portion and the socket terminal.

[0028] In this embodiment, the fixing part 1 includes a front cover 13 and a rear cover 14 that are interlocked, a third sealing ring 53 is arranged between the socket terminal 3 and the front cover 13, a fourth sealing ring 54 is arranged between the socket terminal 3 and the rear cover 14, the flow channel 11 is arranged between the front cover 13 and the rear cover 14, and a fifth sealing ring 55 surrounding the fixing hole 12 and the flow channel 11 is arranged between the front cover 13 and the rear cover 14, so as to ensure the sealing between the front cover and the rear cover; a groove 15 connecting the two fixing holes 12 is arranged on the end surface of the front cover 13 and / or the rear cover 14 to form the flow channel 11; the fixing part is divided into an interlocking front cover and a rear cover, which is convenient for the processing of the internal flow channel, reduces the processing difficulty, and facilitates the assembly of the entire structure.

[0029] The rear cover 14 is provided with four buckling parts 141 which are arranged at the front, back, left and right positions and extend forward. The buckling parts 141 are provided with card slots 142. The outer periphery of the front cover 13 is provided with a receiving groove 131 for accommodating the buckling parts 141. The receiving groove 131 is provided with a buckle 132 which cooperates with the card slot 142. The rear end face of the front cover 13 is provided with two raised positioning posts 133. The front end face of the rear cover 14 is provided with a positioning hole 143 which cooperates with the positioning posts 133. The cooperation between the positioning posts and the positioning holes respectively arranged on the front cover and the rear cover has a fool-proof effect, which facilitates the front and rear alignment assembly of the front cover and the rear cover.

[0030] A fixing panel 6 for tightening the socket terminal 3 inwardly is provided at the rear end of the fixing part 1 (i.e., the rear cover), and the fixing panel 6 is fixed to the rear cover 14 by screws 8; a stop step 121 is provided at the rear end of the fixing hole 12 (i.e., at the rear end of the rear cover), and a ring platform 33 cooperating with the stop step 121 is protruded on the outer peripheral rear end of the socket terminal 3, thereby limiting the forward movement of the socket terminal and playing a positioning role. When the ring platform abuts against the stop step, the flow hole in the socket terminal is just aligned with the flow channel in the fixing part; a flange 61 is extended forward at the front end of the fixing panel 6 and inserted into the fixing hole 12. The front end surface of the flange 61 abuts against the rear end surface of the ring platform 33, thereby fixing the socket terminal in the fixing hole and limiting the forward and backward movement of the socket terminal. The overall assembly is convenient, and there is no need to use claws in the fixing hole to fix the socket terminal, which reduces the difficulty caused by assembling the claws.

[0031] In this embodiment, the connection relationship between the cable and the jack terminal and the pin is as follows: the guide tube 21 in the middle of the cable 2 is crimped into the through hole 41 in the middle of the pin 4, and the copper layer 22 is crimped between the pin 4 and the jack terminal 3, that is, a gap for accommodating the crimped copper layer is provided between the rear end of the pin and the rear end of the jack terminal, and the gap is located on the outside of the second sealing ring 52. The cable is fixed to the pin and the jack terminal by utilizing the mutual squeezing force between the pin and the jack terminal, and the guide tube is connected to the pin.

[0032] The first sealing ring 51 is sleeved on the outer side of the end of the guide tube 21, and a plurality of (four in this embodiment) raised annular bosses 511 are provided at intervals on the outer periphery of the first sealing ring 51. The outer peripheries of the plurality of annular bosses 511 are abutted against the inner wall of the through hole 41 by interference fit. The use of a plurality of annular bosses in contact with the inner wall of the insertion pin can effectively improve the sealing between the insertion pin and the guide tube, and can enhance the bonding force between the three.

[0033] Two annular grooves 34 are provided on the outer periphery of the socket terminal 3 for respectively fitting the third sealing ring 53 and the fourth sealing ring 54 . The two annular grooves 34 are respectively provided on both sides of the flow hole.

[0034] In this embodiment, a detachable anti-touch finger cap 7 is also mounted on the front end of the socket terminal.

[0035] The specific assembly steps of the above charging circuit cooling structure are as follows:

[0036] (1) First install the fixed panel on the cable, put the second sealing ring into the corresponding position of the pin, and put the first sealing ring into the guide tube in the middle of the cable;

[0037] (2) Insert the guide tube in the middle of the cable into the through hole of the pin, and then crimp the copper layer on the cable between the pin and the socket terminal;

[0038] (3) Install the third sealing ring, the fourth sealing ring and the anti-touch finger cap at the corresponding positions of the jack terminal respectively;

[0039] (4) First, install the jack terminal into the corresponding position of the rear cover, install the fifth sealing ring into the groove on the end face of the rear cover, then buckle it with the front cover, and finally use screws to lock the fixed panel and the rear cover to complete the assembly.

[0040] In other embodiments of the present invention, the cooling medium may be silicone oil, compressed air or water.

[0041] In other embodiments of the present invention, the guide tube on the cable is connected to an external liquid cooling circulation device (i.e., a liquid cooling heat exchange device) (on a charging pile or an electric car), so that the cooling medium circulates inside and outside, and then the heat inside the jack terminal is brought out by the cooling medium for cooling.

[0042] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A charging circuit cooling structure, characterized in that: It comprises a fixing part and two jack terminals which are sealed and penetrated in the fixing part and are used for connecting with a cable, a flow guide tube for the flow of cooling medium is provided in the cable, a slot hole with one end being open is provided in the axial middle of the jack terminal, a pin connected with the flow guide tube is provided in the slot hole, a through hole connected with the flow guide tube is provided in the axial middle of the pin, a gap connected with the through hole is provided between the front end and the surrounding of the pin and the slot hole, flow holes connected with the slot hole are provided on the opposite sides of the two jack terminals, and a flow channel connected with the two flow holes is provided on the fixing part; a first sealing ring is provided between the flow guide tube and the pin, and a second sealing ring is provided between the rear end of the pin and the jack terminal.

2. The charging circuit cooling structure according to claim 1, characterized in that: The fixing part is provided with two fixing holes for installing the socket terminal, a third sealing ring and a fourth sealing ring are provided between the socket terminal and the fixing part, and the third sealing ring and the fourth sealing ring are respectively placed on both sides of the flow hole.

3. The charging circuit cooling structure according to claim 2, characterized in that: The fixing part includes a front cover and a rear cover which are buckled together, the third sealing ring is arranged between the socket terminal and the front cover, the fourth sealing ring is arranged between the socket terminal and the rear cover, and a fifth sealing ring is arranged between the front cover and the rear cover, and the flow channel is arranged between the front cover and the rear cover and placed in the fifth sealing ring.

4. The charging circuit cooling structure according to claim 3, characterized in that: The end surface of the front cover and / or the rear cover is provided with a groove communicating with the fixing hole to form the flow channel.

5. The charging circuit cooling structure according to claim 4, characterized in that: The rear cover is provided with a plurality of buckling parts extending forward, the buckling parts are provided with card slots, the outer periphery of the front cover is provided with a receiving slot for accommodating the buckling parts, and the receiving slot is provided with a buckle that cooperates with the card slot; the rear end face of the front cover is provided with a raised positioning column, and the front end face of the rear cover is provided with a positioning hole that cooperates with the positioning column.

6. The charging circuit cooling structure according to claim 5, characterized in that: A fixing panel for pressing the jack terminal inwards is arranged at the rear end of the fixing part.

7. The charging circuit cooling structure according to claim 6, characterized in that: The rear end of the fixing hole is provided with a stop step, the rear end peripheral protrusion of the jack terminal is provided with a ring platform that cooperates with the stop step, the front end of the fixing panel extends forward and is provided with a flange inserted into the fixing hole, and the front end surface of the flange abuts against the rear end surface of the ring platform.

8. The charging circuit cooling structure according to claim 7, characterized in that: The cable comprises a guide tube, a copper layer and an insulating layer from the inside to the outside, the guide tube is crimped into the through hole in the middle of the pin, and the copper layer is crimped between the pin and the socket terminal.

9. The charging circuit cooling structure according to claim 8, characterized in that: The first sealing ring is sleeved on the outer side of the end of the flow guide pipe, and a plurality of raised annular bosses are arranged on the outer periphery of the first sealing ring, and the outer periphery of the annular bosses abuts against the inner wall of the through hole.

10. The charging circuit cooling structure according to claim 9, characterized in that: The outer periphery of the socket terminal is provided with two annular grooves for respectively fitting the third sealing ring and the fourth sealing ring; the fixed panel is fixed to the fixing part by screws.

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