A charging terminal liquid cooling structure

Abstract

A charging terminal liquid cooling structure includes a terminal, a sealing component and a liquid cooling cable. The liquid cooling cable includes a cable conductor connected to the terminal, an insulating layer wrapped outside the cable conductor and an outer sheath arranged outside the insulating layer. There is a flow channel between the outer sheath and the insulating layer. The sealing component includes an insulating sleeve sleeved on the terminal and a sleeve sleeved on the insulating sleeve. The front end of the insulating sleeve is connected to the terminal and the rear end is connected to the insulating layer. The front end of the sleeve is connected to the insulating sleeve and the rear end is connected to the outer sheath through a sealing body. A liquid cooling chamber connected to the flow channel is formed between the sleeve, the insulating sleeve and the sealing body. The liquid cooling chamber is isolated from the terminal by the insulating sleeve, and an adapter connected to the liquid cooling chamber is installed on the sleeve. The present invention is compatible with the battery pack cooling system on new energy vehicles. By arranging an insulating sleeve between the liquid cooling chamber and the terminal, the non-insulating medium coolant in the battery pack cooling system is isolated from the terminal, and the heat of the terminal is transferred to the coolant through heat conduction through the insulating sleeve.

Description

Technical Field

[0001] The invention belongs to the technical field of new energy vehicle charging, and in particular relates to a charging terminal liquid cooling structure. Background Art

[0002] With the introduction and popularization of high-power charging, ordinary charging products can no longer meet the actual use needs. For example, in the field of new energy vehicle charging technology, the high temperature phenomenon of the terminals during charging has always been an industry problem, which not only affects user use, but also poses certain safety hazards. In the existing solution to the high temperature phenomenon of the terminals, the coolant is in direct contact with the terminals, and the cooling medium is an insulating medium, such as silicone oil or mineral oil. However, this solution must use an insulating medium as the cooling medium, which is not compatible with the existing battery pack cooling system on the vehicle, and an additional circulating pump is required to cool the terminals; this is because the coolant used in the battery pack cooling system is a non-insulating medium, such as the most commonly used ethylene glycol mixed coolant, which results in the need for two cooling systems on new energy vehicles to circulate and cool the charging terminals and battery packs respectively, which not only takes up space in the vehicle, but also has high manufacturing and design costs. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a charging terminal liquid cooling structure that is compatible with the existing battery pack cooling system in the vehicle, thereby solving the problem of high temperature of charging terminals and saving the cost of the entire vehicle.

[0004] The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions. According to a charging terminal liquid cooling structure proposed in the present invention, it includes a terminal, a sealing assembly and a liquid cooling cable. The liquid cooling cable includes a cable conductor connected to the terminal, an insulating layer wrapped outside the cable conductor and an outer sheath arranged outside the insulating layer. There is a flow channel for the circulation of coolant between the outer sheath and the insulating layer. The sealing assembly includes an insulating sleeve sleeved on the terminal and a sleeve sleeved on the insulating sleeve, and the front end of the insulating sleeve is connected to the terminal and the rear end is connected to the insulating layer; the front end of the sleeve is connected to the insulating sleeve and the rear end is connected to the outer sheath through a sealing body; a liquid cooling chamber connected to the flow channel is formed between the sleeve, the insulating sleeve and the sealing body, and the liquid cooling chamber is isolated from the terminal by the insulating sleeve, and an adapter connected to the liquid cooling chamber is also installed on the sleeve.

[0005] The present invention is further implemented by the following technical solutions.

[0006] The aforementioned charging terminal liquid cooling structure, wherein the front end of the terminal has a wiring hole for the cable conductor to pass through.

[0007] In the aforementioned charging terminal liquid cooling structure, the cable conductor and the wire threading hole are fixed by crimping.

[0008] The aforementioned charging terminal liquid cooling structure, wherein a sealing ring is installed between the adapter and the sleeve.

[0009] The aforementioned charging terminal liquid cooling structure also includes an end cover connected to the rear end of the sleeve and limiting the axial position of the sealing body.

[0010] The aforementioned charging terminal liquid cooling structure, wherein the end cover and the sleeve are connected by a snap-fit.

[0011] The aforementioned charging terminal liquid cooling structure has a terminal provided with a slot for the front end of the insulating sleeve to be buckled and fixed.

[0012] In the aforementioned charging terminal liquid cooling structure, the middle part of the insulating sleeve is located in the liquid cooling cavity and is arranged in close contact with the terminal.

[0013] In the aforementioned charging terminal liquid cooling structure, the front end of the sleeve and the front end of the insulating sleeve are installed in an interference fit manner to achieve a sealed connection; the rear end of the insulating sleeve and the insulating layer are installed in an interference fit manner to achieve a sealed connection.

[0014] In the aforementioned charging terminal liquid cooling structure, the front end of the sleeve is provided with an inner flange that cooperates with the front end of the insulating sleeve to stop.

[0015] With the help of the above technical solution, the charging terminal liquid cooling structure of the present invention can be compatible with the battery pack cooling system on existing new energy vehicles, without the need to independently set up an additional sequential cooling system, saving the manufacturing cost of the entire vehicle and the space inside the vehicle; by setting an insulating sleeve between the sleeve and the terminal, the non-insulating medium coolant in the battery pack cooling system is completely isolated from the terminal, and heat conduction is achieved through the insulating sleeve, so that the heat generated by the terminal is transferred to the coolant and taken away, thereby finally achieving terminal cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a perspective view of the present invention.

[0017] Figure 2 It is a schematic cross-sectional structural diagram of the sealing component in the present invention.

[0018] Figure 3 It is a schematic diagram of the circulation flow of the coolant when the present invention is working. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0020] See also Figures 1 to 3A charging terminal liquid cooling structure includes a terminal 1, a sealing assembly and a liquid cooling cable. The liquid cooling cable includes a cable conductor 31 connected to the terminal 1, an insulating layer 32 wrapped outside the cable conductor and an outer sheath 33 arranged outside the insulating layer. A flow channel 4 for cooling liquid to flow is provided between the outer sheath 33 and the insulating layer 32; the sealing assembly includes an insulating sleeve 21, a sleeve 22, a sealing body 23 and an end cover 24. In this embodiment, the rear end of the terminal 1 is cylindrical and is provided with a wiring hole 11 for inserting the cable conductor 31. The cable conductor 31 and the wiring hole 11 are preferably crimped to achieve fixation and electrical connection. The insulating sleeve 21 is sleeved on the terminal 1, and a card slot 12 is provided on the terminal 1 for buckling and positioning the front end of the insulating sleeve. The rear end of the insulating sleeve 21 and the insulating layer 32 are assembled in an interference fit manner. The insulating sleeve 21 can reliably seal the connection between the terminal and the cable conductor. The sleeve 22 is sleeved on the insulating sleeve, the front end of the sleeve 22 is sealed and connected to the front end of the insulating sleeve 21, and the rear end of the sleeve is sealed and connected to the outer sheath 33 through the sealing body 23 sleeved on the outer sheath, then a liquid cooling chamber 5 connected to the flow channel 4 inside the liquid-cooled cable is formed between the sleeve, the insulating sleeve and the sealing body, the insulating sleeve 21 is used to isolate the liquid cooling chamber 5 from the terminal 1, and the sleeve is also equipped with an adapter 6 connected to the liquid cooling chamber 5, and the rear end of the sleeve 22 is connected to the end cover 24 to realize the positioning of the sealing body 23.

[0021] In this embodiment, the sleeve 22 is a part made of insulating material, the insulating sleeve 21 is made of a rubber material with good thermal conductivity, and the insulating sleeve is a three-section one-piece molding structure, wherein the front end of the insulating sleeve is used to be fixed to the terminal and has an interference fit with the sleeve, the middle part of the insulating sleeve is in contact with the terminal to facilitate heat transfer, and the rear end of the insulating sleeve is used to be sealed and connected to the insulating layer; the rear end of the sleeve 22 has an interference fit with the sealing body, and the insulating layer is also inserted into the insulating sleeve in an interference fit installation manner, thereby ensuring the overall sealing of the liquid cooling chamber; a corrugated structure is provided at the contact portion between the insulating sleeve or the sealing body and the sleeve to facilitate achieving better sealing performance.

[0022] Preferably, the cable conductor 31 is a copper core cable; the inner wall of the insulating sleeve 21 fits the outer wall of the terminal 1 as closely as possible to increase the contact area and achieve better heat conduction; the inner wall of the outer sheath 33 is provided with a skeleton 331 for supporting and positioning the cable conductor and forming a stable flow channel, and the sealing body can also be squeezed and sealed more tightly with the outer sheath by means of the skeleton; the front end of the sleeve 22 has an inwardly folded flange 221. When the present invention is assembled, the sleeve is fixed by the internal insulator structure of the connector, and the terminal is connected to the corresponding contact piece to realize power transmission. The flange 221 can cooperate with the front end of the insulating sleeve to prevent the terminal from escaping from the front end of the sleeve when the terminal 1 is subjected to axial forward pulling force; the inner wall of the rear end of the sleeve has a positioning step for facilitating the installation of the sealing body, and the outer wall of the rear end of the sleeve extends radially to form a flange 222 that is snap-connected with the hook 241 of the end cover; a sealing ring 61 is also provided between the adapter and the sleeve.

[0023] Combination Figure 3 , the working process of the present invention is as follows:

[0024] The adapter 6 is connected to the battery pack cooling system in the new energy vehicle. The battery pack cooling system provides circulating coolant to the adapter. The coolant enters the liquid cooling cavity 5 through the adapter and fills the liquid cooling cavity 5. The coolant contacts the insulating sleeve 21, and the insulating sleeve 21 contacts the terminal 1. The heat of the terminal is transferred to the coolant by heat conduction, thereby reducing the terminal temperature. The coolant finally enters the flow channel 4 in the liquid cooling cable from the liquid cooling cavity and circulates back to the battery pack cooling system.

[0025] In other embodiments of the liquid cooling structure of the charging terminal, the insulating sleeve can also be made of a ceramic material with better thermal conductivity. In this case, the insulating sleeve is installed on the terminal with a gap between the two. The gap can be filled with thermal conductive glue to achieve heat conduction and a sealing structure can be set to achieve sealing; the end cover can be connected to the rear end of the sleeve by threads; the type of terminal is not limited to wiring terminals or transfer terminals, etc., and can also be a pin contact or a socket contact used in various connector fields, and the present invention is not limited to this.

[0026] The above is only a preferred embodiment of the present invention. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention, still falls within the scope of the technical solution of the present invention.

Claims

1. A charging terminal liquid cooling structure, comprising a terminal, a sealing assembly and a liquid cooling cable, wherein the liquid cooling cable comprises a cable conductor connected to the terminal, an insulating layer wrapped around the cable conductor and an outer sheath arranged outside the insulating layer, wherein a flow channel for cooling liquid to flow is provided between the outer sheath and the insulating layer, and wherein: The sealing assembly includes an insulating sleeve sleeved on the terminal and a sleeve sleeved on the insulating sleeve, and the front end of the insulating sleeve is connected to the terminal, and the rear end is connected to the insulating layer; the front end of the sleeve is connected to the insulating sleeve, and the rear end is connected to the outer sheath through a sealing body; a liquid cooling chamber connected to the flow channel is formed between the sleeve, the insulating sleeve and the sealing body, and the liquid cooling chamber is isolated from the terminal by the insulating sleeve, and an adapter connected to the liquid cooling chamber is also installed on the sleeve.

2. The charging terminal liquid cooling structure according to claim 1, characterized in that: The front end of the terminal is provided with a wiring hole for the cable conductor to pass through.

3. The charging terminal liquid cooling structure according to claim 2, characterized in that: The cable conductor and the threading hole are fixed by crimping.

4. The charging terminal liquid cooling structure according to claim 1, characterized in that: A sealing ring is installed between the adapter and the sleeve.

5. The charging terminal liquid cooling structure according to claim 1, characterized in that: It also includes an end cover which is connected to the rear end of the sleeve and limits the axial position of the sealing body.

6. The charging terminal liquid cooling structure according to claim 5, characterized in that: The end cover is connected to the sleeve by a buckle.

7. The charging terminal liquid cooling structure according to any one of claims 1 to 6, characterized in that: The terminal is provided with a slot for fastening and fixing the front end of the insulating sleeve.

8. The charging terminal liquid cooling structure according to claim 7, characterized in that: The middle part of the insulating sleeve is located in the liquid cooling cavity and is arranged in close contact with the terminal.

9. The charging terminal liquid cooling structure according to claim 8, characterized in that: The front end of the sleeve and the front end of the insulating sleeve are installed in an interference fit manner to achieve a sealed connection; the rear end of the insulating sleeve and the insulating layer are installed in an interference fit manner to achieve a sealed connection.

10. The charging terminal liquid cooling structure according to claim 9, characterized in that: The front end of the sleeve is provided with an inner flange which cooperates with the front end of the insulating sleeve for stopping.

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