High-voltage connector assembly, battery pack and vehicle

Abstract

The invention relates to a high-voltage connector assembly, a battery pack and a vehicle, the high-voltage connector assembly comprises a heat dissipation pipe and a high-voltage connector, the heat dissipation pipe is internally provided with a heat dissipation channel for a liquid cooling medium to circulate, and one end of the heat dissipation pipe is provided with a liquid cooling medium inlet communicated with the heat dissipation channel; the other end of the heat dissipation pipe is provided with a liquid cooling medium outlet communicated with the heat dissipation pipe, and the liquid cooling medium inlet and the liquid cooling medium outlet are both communicated with a liquid cooling device of the battery pack. The heat dissipation pipes wrap the outer walls of the connecting aluminum bars of part of the high-voltage connectors, and liquid cooling heat exchange is carried out between the heat dissipation pipes and the connecting aluminum bars. Namely, the outer wall of the connecting aluminum bar of the high-voltage connector is coated with the radiating pipe, and the liquid cooling medium of the liquid cooling device of the battery pack can be utilized to circulate in the radiating channel of the radiating pipe, so that the radiating of the connecting aluminum bar is realized, the temperature rise of the connecting aluminum bar is reduced to a certain extent, and the service life of the connecting aluminum bar is prolonged. Therefore, the normal use of the high-voltage connector can be ensured, and the charging multiplying power of the vehicle is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of heat dissipation, and particularly to a high-voltage connector assembly, a battery pack, and a vehicle. Background Art

[0002] In recent years, the sales volume of new energy vehicles has increased exponentially, and the market retention rate has also become higher and higher. Compared with fuel vehicles, electric vehicles have the advantages of environmental protection, good driving experience, low vehicle use cost, and greater intelligence.

[0003] However, for new energy vehicles, the problem of the driving range of new energy vehicles is a rather thorny problem faced by the current design of new energy vehicles. Generally, there are mainly two ways to solve the problem of the driving range of new energy vehicles. The first is to increase the capacity of the battery pack to increase the driving range of the whole vehicle, and the second is to increase the charging rate of the battery pack, that is, to solve the driving range problem by shortening the charging time.

[0004] The high-voltage connector is an important connecting device in the high-voltage charging circuit of the battery pack, and the temperature rise problem of the high-voltage connector will affect the charging rate of the battery pack. Therefore, how to reduce the temperature rise of the high-voltage connector to improve the charging rate of the battery pack is an urgent problem to be solved at present. Summary of the Invention

[0005] In order to solve the above technical problems, the present disclosure provides a high-voltage connector assembly, a battery pack, and a vehicle.

[0006] In a first aspect, the present disclosure provides a high-voltage connector assembly, including a high-voltage connector and a heat dissipation tube;

[0007] The heat dissipation tube has a heat dissipation channel for the flow of a liquid cooling medium. One end of the heat dissipation tube has a liquid cooling medium inlet communicating with the heat dissipation channel, and the other end of the heat dissipation tube has a liquid cooling medium outlet communicating with the heat dissipation channel. Both the liquid cooling medium inlet and the liquid cooling medium outlet are communicated with a liquid cooling device in a battery pack of a vehicle;

[0008] The high-voltage connector includes a connecting aluminum rod. The heat dissipation tube is wrapped around a part of the outer wall of the connecting aluminum rod and exchanges liquid cooling heat with the connecting aluminum rod.

[0009] In some embodiments, the extending direction of the heat dissipation channel is perpendicular to the axial direction of the connecting aluminum rod; and / or, the heat dissipation tube is located inside the battery pack.

[0010] In some embodiments, the heat dissipation tube includes a first tube section, an arc-shaped tube section, and a second tube section that are sequentially connected and communicate with each other. The first tube section and the second tube section are located on opposite sides of the connecting aluminum bar. The liquid cooling medium inlet is provided at one end of the first tube section away from the arc-shaped tube section, and the liquid cooling medium outlet is provided at one end of the second tube section away from the arc-shaped tube section.

[0011] In some embodiments, there is a smooth transition between the first tube section and the arc-shaped tube section; and / or, there is a smooth transition between the second tube section and the arc-shaped tube section; and / or, the inner contour of the arc-shaped tube section is adapted to the outer contour of the connecting aluminum bar.

[0012] In some embodiments, the connecting aluminum bar includes a first sub-aluminum bar and a second sub-aluminum bar that are sequentially arranged along the axis perpendicular to the connecting aluminum bar;

[0013] The position of the first tube section corresponding to the gap between the first sub-aluminum bar and the second sub-aluminum bar bulges towards the direction close to the second tube section to form a first extended convex part, and the first extended convex part extends into the gap; and / or, the position of the second tube section corresponding to the gap between the first sub-aluminum bar and the second sub-aluminum bar bulges towards the direction close to the first tube section to form a second extended convex part, and the second extended convex part extends into the gap.

[0014] In some embodiments, the high-voltage connector assembly further includes a heat-conducting block assembly. The heat-conducting block assembly is located between the connecting aluminum bar and the liquid cooling device of the battery pack, and the heat-conducting block assembly is in contact with and conducts heat from the connecting aluminum bar and the liquid cooling device respectively.

[0015] In some embodiments, along the axis of the connecting aluminum bar, the connecting aluminum bar includes a first connecting end and a second connecting end that are oppositely arranged. The first connecting end is located inside the battery pack and is used to connect with the wire harness inside the high-voltage connector, and the second connecting end is located outside the battery pack and is used to connect with the wire harness outside the high-voltage connector;

[0016] The heat-conducting block assembly is arranged between the first connecting end and the liquid cooling device.

[0017] In some embodiments, the heat-conducting block assembly includes a heat-conducting insulating film, a heat-conducting pad, and a heat-conducting block that are sequentially arranged. The heat-conducting insulating film is attached to the bottom surface of the first connecting end, the heat-conducting pad is arranged on the side of the heat-conducting insulating film away from the first connecting end, and the heat-conducting block is arranged on the side of the heat-conducting pad away from the heat-conducting insulating film and is attached to the liquid cooling device.

[0018] In some embodiments, along the axial direction of the connecting aluminum bar, the connecting aluminum bar includes a first connecting end and a second connecting end which are oppositely arranged. The outer wall surface of the first connecting end has a first welding surface for welding with the wire harness inside the high-voltage connector, and the outer wall surface of the second connecting end has a second welding surface for welding with the wire harness outside the high-voltage connector.

[0019] In a second aspect, the present disclosure provides a battery pack, including a liquid cooling device and a high-voltage connector assembly.

[0020] In a third aspect, the present disclosure provides a vehicle, including a battery pack and the high-voltage connector assembly as described above or including the battery pack as described above.

[0021] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the prior art:

[0022] The present disclosure provides a high-voltage connector assembly, a battery pack and a vehicle. The high-voltage connector assembly includes a high-voltage connector and a heat dissipation tube. The heat dissipation tube has a heat dissipation channel for the liquid cooling medium to flow through. One end of the heat dissipation tube has a liquid cooling medium inlet communicating with the heat dissipation channel, and the other end of the heat dissipation tube has a liquid cooling medium outlet communicating with the heat dissipation channel. Both the liquid cooling medium inlet and the liquid cooling medium outlet are communicated with the liquid cooling device in the battery pack of the vehicle. The high-voltage connector includes a connecting aluminum bar, and the heat dissipation tube is coated on a part of the outer wall of the connecting aluminum bar and exchanges liquid cooling heat with the connecting aluminum bar. That is to say, for the high-voltage connector assembly provided by the present disclosure, by coating the heat dissipation tube on the outer wall of the connecting aluminum bar of the high-voltage connector, and the liquid cooling medium of the liquid cooling device of the battery pack itself can be utilized to flow in the heat dissipation channel of the heat dissipation tube, so as to realize the heat dissipation of the connecting aluminum bar, to reduce the temperature rise of the connecting aluminum bar to a certain extent, so as to ensure the normal use of the high-voltage connector and improve the charging rate of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of the cooperation between the high-voltage connector assembly and the high-voltage connector described in the embodiments of the present disclosure;

[0026] Figure 2Structural schematic diagrams of the high-voltage connector assembly, high-voltage connector, and battery pack box according to the embodiments of the present disclosure Figure 1 ;

[0027] Figure 3 Structural schematic diagrams of the high-voltage connector assembly, high-voltage connector, and battery pack box according to the embodiments of the present disclosure Figure 2 ;

[0028] Figure 4 Exploded view of the high-voltage connector of the battery pack according to the embodiments of the present disclosure;

[0029] Figure 5 Structural schematic diagram of the connecting aluminum bar of the high-voltage connector of the battery pack according to the embodiments of the present disclosure;

[0030] Figure 6 Cross-sectional view of the welding protective cover of the high-voltage connector of the battery pack according to the embodiments of the present disclosure;

[0031] Figure 7 Cross-sectional view of the aluminum bar outlet protective cover of the high-voltage connector of the battery pack according to the embodiments of the present disclosure;

[0032] Figure 8 Structural schematic diagram of the connector flange of the high-voltage connector of the battery pack according to the embodiments of the present disclosure;

[0033] Figure 9 Structural schematic diagram of the high-voltage connector of the battery pack and the battery pack box according to the embodiments of the present disclosure.

[0034] Reference numerals:

[0035] 1. Heat dissipation tube; 11. Liquid cooling medium inlet; 12. Liquid cooling medium outlet; 13. First pipe section; 14. Arc-shaped pipe section; 15. Second pipe section; 16. Pipeline joint; 17. First extension protrusion; 18. Second extension protrusion; 2. High-voltage connector; 21. Connecting aluminum bar; 211. First sub-aluminum bar; 212. Second sub-aluminum bar; 213. First connection end; 214. Second connection end; 215. First welding surface; 216. Second welding surface; 217. First groove; 218. Second groove; 219. Fixing hole; 22. Connector radial sealing ring; 23. Insulating sheath; 24. Connector flange; 241. Positioning annular groove; 25. Aluminum bar axial sealing ring; 26. Aluminum bar clamping sheath; 27. Aluminum bar outlet protective cover; 271. Positioning protrusion; 272. Second through hole; 28. Welding protective cover; 281. First through hole; 29. Flange bushing; 3. Heat conduction block assembly; 31. Heat conduction insulating film; 32. Heat conduction block; 4. Battery pack box; 5. Fastener. Detailed implementation manners

[0036] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0038] Embodiment 1

[0039] Reference Figures 1 to 2 As shown, this embodiment provides a high-voltage connector assembly, including a high-voltage connector 2 and a heat dissipation pipe 1.

[0040] The heat dissipation tube 1 has a heat dissipation channel for liquid cooling medium to flow therein, one end of the heat dissipation tube 1 has a liquid cooling medium inlet 11 connected to the heat dissipation channel, the other end of the heat dissipation tube 1 has a liquid cooling medium outlet 12 connected to the heat dissipation tube 1, and both the liquid cooling medium inlet 11 and the liquid cooling medium outlet 12 are connected to the liquid cooling device in the battery pack of the vehicle.

[0041] The high-voltage connector 2 includes a connecting aluminum rod 21 . The heat dissipation tube 1 is coated on a portion of the outer wall of the connecting aluminum rod 21 and performs liquid cooling and heat exchange with the connecting aluminum rod 21 .

[0042] When implementing it, refer to Figure 1 As shown, the heat dissipation pipe 1 may be as follows Figure 1 In the flat tube shown, the heat dissipation tube 1 is coated on a part of the outer wall of the connecting aluminum rod 21 of the high-voltage connector 2, so that the heat generated by the connecting aluminum rod 21 of the high-voltage connector 2 during operation can be quickly exchanged with the liquid cooling medium in the heat dissipation tube 1, thereby realizing the cooling operation of the connecting aluminum rod 21 and avoiding the problem of affecting the charging rate of the battery pack caused by the rapid heating of the connecting aluminum rod 21.

[0043] Specifically, the heat pipe 1 in this embodiment utilizes the liquid cooling medium in the liquid cooling device of the battery pack itself to circulate in the heat pipe 1, thereby realizing heat exchange with the connected aluminum rod 21, without the need to additionally set up a storage box for storing the liquid cooling medium, thereby simplifying the structure and reducing the manufacturing cost.

[0044] Exemplarily, the liquid cooling medium may be, for example, a coolant or cooling water. By introducing a coolant or cooling water with a lower temperature into the heat dissipation channel, as the coolant or cooling water circulates in the heat dissipation channel, liquid cooling heat exchange is performed with the connected aluminum rod 21, so that the temperature of the connected aluminum rod 21 is reduced, thereby achieving a cooling operation on the connected aluminum rod 21.

[0045] The high-voltage connector assembly of this embodiment is provided with a heat dissipation tube 1 and a high-voltage connector 2. The heat dissipation tube 1 has a heat dissipation channel for the liquid cooling medium to flow through. One end of the heat dissipation tube 1 has a liquid cooling medium inlet 11 communicating with the heat dissipation channel, and the other end of the heat dissipation tube 1 has a liquid cooling medium outlet 12 communicating with the heat dissipation channel. Both the liquid cooling medium inlet 11 and the liquid cooling medium outlet 12 are communicated with the liquid cooling device in the vehicle's battery pack. The heat dissipation tube 1 is coated on a part of the outer wall of the connecting aluminum rod 21 of the high-voltage connector 2 and exchanges liquid cooling heat with the connecting aluminum rod 21. That is to say, the high-voltage connector assembly provided in this embodiment coats the heat dissipation tube 1 on the outer wall of the connecting aluminum rod 21 of the high-voltage connector 2, and can utilize the liquid cooling medium of the liquid cooling device of the battery pack itself to flow in the heat dissipation channel of the heat dissipation tube 1, so as to realize the heat dissipation of the connecting aluminum rod 21, to a certain extent reduce the temperature rise of the connecting aluminum rod 21, and thus ensure the normal use of the high-voltage connector 2 and improve the charging rate of the vehicle.

[0046] Referring to Figure 1 and Figure 2 As shown, in some embodiments, the extending direction of the heat dissipation channel is perpendicular to the axial direction of the connecting aluminum rod 21.

[0047] Specifically, when implemented, part of the high-voltage connector 2 is located inside the battery pack housing 4 of the battery pack and part is located outside the battery pack housing 4. In order to make full use of the internal space of the battery pack housing 4, the extending direction of the heat dissipation channel can be set perpendicular to the axial direction of the connecting aluminum rod 21, that is, the overall extending direction of the heat dissipation tube 1 can be set perpendicular to the axial direction of the connecting aluminum rod 21.

[0048] Furthermore, in order to better realize the connection between the liquid cooling medium inlet 11 and the liquid cooling medium outlet 12 of the heat dissipation tube 1 and the liquid cooling device of the battery pack, and utilize the liquid cooling medium of the liquid cooling device of the battery pack itself as the heat exchange medium to flow in the heat dissipation channel to realize the heat exchange of the connecting aluminum rod 21, the heat dissipation tube 1 can be entirely located inside the battery pack, so as to save the connection path of the connecting pipe for connecting the heat dissipation tube 1 and the liquid cooling device in the battery pack.

[0049] Exemplarily, pipeline connectors 16 can be provided at both ends of the heat dissipation tube 1 to connect with the liquid cooling device in the battery pack.

[0050] Referring to Figure 1 and Figure 2 As shown, in some embodiments, the heat dissipation tube 1 includes a first pipe section 13, an arc pipe section 14, and a second pipe section 15 that are sequentially connected and communicated. The first pipe section 13 and the second pipe section 15 are located on opposite sides of the connecting aluminum rod 21. The liquid cooling medium inlet 11 is provided at one end of the first pipe section 13 away from the arc pipe section 14, and the liquid cooling medium outlet 12 is provided at one end of the second pipe section 15 away from the arc pipe section 14.

[0051] That is to say, the first pipe section 13 and the second pipe section 15 can be located on opposite sides of the connecting aluminum rod 21 along its radial direction, and the same ends of the first pipe section 13 and the second pipe section 15 can be connected and communicated through the arc-shaped pipe section 14, so that the whole heat dissipation pipe 1 can present a U-shaped pipe structure or a snake-shaped structure, so as to be adapted to the outer contour of the connecting aluminum rod 21, so that the heat dissipation pipe 1 can be wrapped on the outer wall of the connecting aluminum rod 21 and perform liquid cooling heat exchange with the connecting aluminum rod 21, thereby improving the heat exchange efficiency.

[0052] Refer to Figure 1 As shown, in some embodiments, there is a smooth transition between the first pipe section 13 and the arc-shaped pipe section 14, and there is a smooth transition between the second pipe section 15 and the arc-shaped pipe section 14, so that the whole heat dissipation pipe 1 presents a relatively smooth tubular structure, which can not only make its overall structure more beautiful, but also increase the contact heat exchange area with the connecting aluminum rod 21 to improve the heat exchange efficiency.

[0053] Furthermore, the inner contour of the arc-shaped pipe section 14 is adapted to the outer contour of the connecting aluminum rod 21, so that the two can be fully attached and contacted, so as to further increase the heat exchange contact area between the two and improve the heat exchange efficiency.

[0054] Exemplarily, the first pipe section 13, the second pipe section 15 and the arc-shaped pipe section 14 can be integrally formed, so as to save the manufacturing process and improve the overall structural strength of the heat dissipation pipe 1. Exemplarily, the heat dissipation pipe 1 can be made of a metal with good thermal conductivity, such as aluminum or iron.

[0055] In addition, the width of the heat dissipation pipe 1 can be adjusted according to the requirement of the cooling length of the connecting aluminum rod 21, and the cooling length can be set to be greater than 20 mm, that is, the width dimension of the heat dissipation pipe 1 along the axial direction of the connecting aluminum rod 21 can be set to be greater than 20 mm.

[0056] Refer to Figures 1 to 4 As shown, in some embodiments, the connecting aluminum rod 21 includes a first sub-aluminum rod 211 and a second sub-aluminum rod 212 arranged in sequence along the direction perpendicular to the axial direction of the connecting aluminum rod 21.

[0057] The position of the first pipe section 13 corresponding to the gap between the first sub-aluminum rod 211 and the second sub-aluminum rod 212 protrudes towards the direction close to the second pipe section 15 to form a first extension protrusion 17, and the first extension protrusion 17 extends into the gap; the position of the second pipe section 15 corresponding to the gap between the first sub-aluminum rod 211 and the second sub-aluminum rod 212 protrudes towards the direction close to the first pipe section 13 to form a second extension protrusion 18, and the second extension protrusion 18 extends into the gap.

[0058] That is to say, when the connecting aluminum bar 21 is set to include a first sub-aluminum bar 211 and a second sub-aluminum bar 212 connected in sequence, in order to make the heat exchange contact area between the heat dissipation tube 1 and the connecting aluminum bar 21 larger to improve the heat exchange efficiency, it can be set that the position of the first pipe section 13 corresponding to the gap between the first sub-aluminum bar 211 and the second sub-aluminum bar 212 protrudes towards the direction close to the second pipe section 15 to form a first extension protrusion 17, so that the first extension protrusion 17 can extend into the gap between the first sub-aluminum bar 211 and the second sub-aluminum bar 212, so as to increase the contact heat exchange area between the first pipe section 13 and the connecting aluminum bar 21.

[0059] Correspondingly, it can also be set that the position of the second pipe section 15 corresponding to the gap between the first sub-aluminum bar 211 and the second sub-aluminum bar 212 protrudes towards the direction close to the first pipe section 13 to form a second extension protrusion 18, so that the second extension protrusion 18 can extend into the gap between the first sub-aluminum bar 211 and the second sub-aluminum bar 212, so as to increase the contact heat exchange area between the second pipe section 15 and the connecting aluminum bar 21.

[0060] Refer to Figure 1 、 Figure 3 As shown, in some embodiments, the high-voltage connector assembly further includes a heat conduction block assembly 3. The heat conduction block assembly 3 is located between the connecting aluminum bar 21 and the liquid cooling device of the battery pack, and the heat conduction block assembly 3 is in contact with and conducts heat to the connecting aluminum bar 21 and the liquid cooling device respectively.

[0061] That is to say, in addition to performing liquid cooling heat exchange on the connecting aluminum bar 21 by setting the heat dissipation tube 1, contact heat exchange can also be performed between the heat conduction block assembly 3 and the connecting aluminum bar 21, so that the heat generated when the connecting aluminum bar 21 works is transferred to the liquid cooling device in the battery pack through the heat conduction block assembly 3, so as to facilitate the heat dissipation of the connecting aluminum bar 21.

[0062] Refer to Figures 1 to 4 As shown, in some embodiments, along the axial direction of the connecting aluminum bar 21, the connecting aluminum bar 21 includes a first connection end 213 and a second connection end 214 which are oppositely arranged. The first connection end 213 is located inside the battery pack and is used for connecting with the wire harness inside the high-voltage connector 2, and the second connection end 214 is located outside the battery pack and is used for connecting with the wire harness outside the high-voltage connector 2.

[0063] The heat conduction block assembly 3 is arranged between the first connection end 213 and the liquid cooling device.

[0064] In specific implementation, in order to effectively utilize the internal space of the battery pack housing 4 of the battery pack, the heat conduction block assembly 3 can also be arranged inside the battery pack housing 4. At this time, the first connection end 213 located inside the battery pack and connected to the wire harness inside the high-voltage connector 2 can be in contact with the heat conduction block assembly 3 for heat exchange, and transfer the heat generated during the operation of the connecting aluminum bar 21 to the liquid cooling device through the heat conduction block assembly 3 to achieve heat dissipation.

[0065] In addition, it should be noted that the first connection end 213 is used to connect to the wire harness inside the high-voltage connector 2. Therefore, a relatively large contact resistance will be generated at the first connection end 213, resulting in a relatively high temperature rise. In this embodiment, the heat conduction block assembly 3 is arranged between the first connection end 213 and the liquid cooling device, which can conduct the working heat at the first connection end 213 out faster to avoid excessive temperature rise affecting the charging rate of the battery pack.

[0066] In some embodiments, the heat conduction block assembly 3 includes a heat conduction insulating film 31, a heat conduction pad, and a heat conduction block 32 arranged in sequence. The heat conduction insulating film 31 is adhesively arranged on the bottom surface of the first connection end 213. The heat conduction pad is arranged on the side of the heat conduction insulating film 31 away from the first connection end 213. The heat conduction block 32 is arranged on the side of the heat conduction pad away from the heat conduction insulating film 31 and is adhesively arranged with the liquid cooling device, so that the working heat at the first connection end 213 is sequentially transferred to the liquid cooling device through the heat conduction insulating film 31, the heat conduction pad, and the heat conduction block 32 to achieve the heat dissipation effect on the connecting aluminum bar 21.

[0067] Exemplarily, the thermal conductivity of the heat conduction block assembly 3 can be selected to be greater than 2 W / m·k. In addition, from the cross-section, the ratio of the cross-sectional area of the heat conduction block assembly 3 to the cross-sectional area of the connecting aluminum bar 21 can be set to be greater than 80%.

[0068] Refer to Figures 1 to 5 As shown, in some embodiments, along the axial direction of the connecting aluminum bar 21, the connecting aluminum bar 21 includes a first connection end 213 and a second connection end 214 arranged oppositely. The outer wall surface of the first connection end 213 has a first welding surface 215 welded to the wire harness inside the high-voltage connector 2, and the outer wall surface of the second connection end 214 has a second welding surface 216 welded to the wire harness outside the high-voltage connector 2.

[0069] In specific implementation, the connection between the aluminum rod 21 and the terminal of the wire harness in the related art is usually a plug-in fit or a screw connection. In the design of the high-voltage circuit, the general theory is that the ordinary contact resistance is greater than the welding contact resistance. Therefore, in order to reduce the connection resistance between the aluminum rod 21 and the internal wire harness and the connection resistance between the aluminum rod 21 and the external wire harness, so as to achieve the purpose of reducing the temperature rise, in this embodiment, the first connection end 213 of the aluminum rod 21 is provided with a first welding surface 215, so as to perform a welding connection with the internal wire harness of the high-voltage connector 2 through the first welding surface 215 to reduce the high-voltage circuit resistance. Similarly, the second connection end 214 of the aluminum rod 21 is provided with a second welding surface 216 for welding connection with the wire harness outside the high-voltage connector 2 to reduce the resistance of the high-voltage circuit and thus reduce the temperature rise.

[0070] In addition, when the first welding surface 215 is welded to the internal wire harness of the high-voltage connector 2, a tooling can be set up to achieve different welding angles of the internal wire harness to meet the actual requirements. Similarly, when the second welding surface 216 is welded to the external wire harness of the high-voltage connector 2, different welding angles of the external wire harness can also be achieved through the tooling to meet the actual requirements.

[0071] Embodiment 2

[0072] Referring to Figures 1 to 9 As shown, this embodiment also provides a battery pack, including a liquid cooling device and a high-voltage connector assembly.

[0073] The specific structure and implementation principle of the high-voltage connector assembly in this embodiment are the same as those of the high-voltage connector assembly provided in Embodiment 1 and can bring the same or similar technical effects, which will not be elaborated here one by one. Specifically, reference can be made to the description of Embodiment 1.

[0074] In the battery pack of this embodiment, a heat dissipation tube 1 is coated on the outer wall of the aluminum rod 21 of the high-voltage connector 2, and the liquid cooling medium of the liquid cooling device of the battery pack itself can be used to flow in the heat dissipation channel of the heat dissipation tube 1, so as to realize the heat dissipation of the aluminum rod 21, to a certain extent reduce the temperature rise of the aluminum rod 21, so as to ensure the normal use of the high-voltage connector 2 and improve the charging rate of the vehicle.

[0075] Exemplarily, referring to Figures 4 to 9 As shown, the specific structure of the high-voltage connector 2 can be: the high-voltage connector 2 includes an aluminum rod 21, a connector radial sealing ring 22, an insulating sheath 23, a connector flange 24, an aluminum rod axial sealing ring 25, an aluminum rod clamping sheath 26, an aluminum rod outlet protection cover 27 and a welding protection cover 28.

[0076] Specifically, the first groove 217 and the second groove 218 can be provided on the connecting aluminum rod 21. Both the first groove 217 and the second groove 218 cooperate with the aluminum rod axial sealing ring 25, so as to reliably install the aluminum rod axial sealing ring 25 on the connecting aluminum rod 21. Then, the aluminum rod clamping sheath 26 is sleeved on the aluminum rod axial sealing ring 25.

[0077] Next, after the insulating sheath 23 is sleeved on the connecting aluminum rod 21, the connector radial sealing ring 22 is sleeved on the insulating sheath 23, and the connector flange 24 is sleeved outside the insulating sheath 23 and radially sealed through the connector radial sealing ring 22. At this time, part of the aluminum rod clamping sheath 26 can penetrate through the through hole of the connector flange 24.

[0078] Next, the aluminum rod outlet protective cover 27 is sleeved on the connector flange 24. At this time, an annular positioning protrusion 271 can be provided on the aluminum rod outlet protective cover 27, and a positioning annular groove 241 cooperating with the positioning protrusion 271 is provided on the outer wall of the connector flange 24, so as to realize the connection device between the two. At this time, part of the aluminum rod clamping sheath 26 is located in the second through hole 272 of the aluminum rod outlet protective cover 27.

[0079] Finally, the welding protective cover 28 is connected to the aluminum rod outlet protective cover 27 by means of threaded cooperation. At this time, the second connection end 214 of the connecting aluminum rod 21 can penetrate through the first through hole 281 of the welding protective cover 28 for welding connection with the wire harness outside the high-voltage connector 2.

[0080] Specifically, the main function of the welding protective sleeve is to provide IPXXB (finger-proof protection level) protection for the metal of high-voltage conduction after the connection between the connecting aluminum rod 21 and the wire harness outside the high-voltage connector 2 is completed. The main function of the aluminum rod outlet protective cover 27 is to fix the overall connecting aluminum rod 21 and the rear connector flange 24, and at the same time fix the aluminum rod axial sealing ring 25 and the aluminum rod clamping sheath 26. The main function of the aluminum rod clamping sheath 26 is to fix the aluminum rod axial sealing ring 25 and connect with the aluminum rod outlet protective cover 27 to fix the position of the connecting aluminum rod 21. The main function of the aluminum rod axial sealing ring 25 is to prevent water vapor from entering the battery pack through the small pores in the axial direction of the connecting aluminum rod 21 and provide IP67 (International Protection code, protection safety level) protection. The main function of the connector flange 24 is to fix the entire high-voltage connector 2. Specifically, the connector flange 24 can be connected to the battery pack box body 4 through fasteners 5 such as bolts, so as to realize the fixation of the high-voltage connector 2 and the battery pack box body 4.

[0081] Further, when the connector flange 24 is connected to the battery pack housing 4 by bolts, a flange bushing 29 can be provided in the connection holes of the connector flange 24 through which the bolts pass. The main function of the flange bushing 29 is to increase the structural strength and prevent the bolts from crushing the connector flange 24 during the tightening process. The main function of the connector radial sealing ring 22 is to ensure the radial seal of the connector flange 24 and achieve the IP67 design.

[0082] In addition, the main function of the insulating sheath 23 is to shield the metal part of the connecting aluminum bar 21 and play an insulating and protective role. The main function of the connecting aluminum bar 21 is for electrical connection / current conduction / structural fixation. Specifically, a fixing hole 219 can be provided at the first connection end 213 of the connecting aluminum bar 21 for connection with the battery pack housing 4.

[0083] It should be noted that, as shown in Figure 4 When specifically installed, the part on the left side of the connector flange 24 is entirely located inside the battery pack housing 4, and the part on the right side of the connector flange 24 is entirely located outside the battery pack housing 4.

[0084] In addition, in the design of the high-voltage connector 2, generally NTC, high-voltage interlock, and shielding layers are designed. In this embodiment, shielding layers are required at other positions of the high-voltage connector 2. For example, a metal mesh can be added externally to complete the shielding design.

[0085] Embodiment III

[0086] As shown in Figures 1 to 9 This embodiment also provides a vehicle, including a high-voltage connector assembly or including a battery pack.

[0087] The specific structure and implementation principle of the high-voltage connector assembly in this embodiment are the same as those of the high-voltage connector assembly provided in Embodiment I and can bring the same or similar technical effects, which will not be elaborated here one by one. Specifically, reference can be made to the description of Embodiment I.

[0088] The specific structure and implementation principle of the battery pack in this embodiment are the same as those of the battery pack provided in Embodiment II and can bring the same or similar technical effects, which will not be elaborated here one by one. Specifically, reference can be made to the description of Embodiment II.

[0089] For the vehicle in this embodiment, by covering the outer wall of the connecting aluminum bar 21 of the high-voltage connector 2 in the battery pack with a heat dissipation tube 1, and the liquid cooling medium of the liquid cooling device of the battery pack itself can flow in the heat dissipation channels of the heat dissipation tube 1, thereby realizing the heat dissipation of the connecting aluminum bar 21, to a certain extent reducing the temperature rise of the connecting aluminum bar 21, and thus ensuring the normal use of the high-voltage connector 2 and improving the charging rate of the vehicle.

[0090] It should be noted that, in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the said element.

[0091] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather will conform to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-voltage connector assembly, characterized in that, It includes a high-voltage connector and a heat dissipation pipe; The heat dissipation pipe has a heat dissipation channel for the liquid cooling medium to flow through. One end of the heat dissipation pipe has a liquid cooling medium inlet communicating with the heat dissipation channel, and the other end of the heat dissipation pipe has a liquid cooling medium outlet communicating with the heat dissipation channel. Both the liquid cooling medium inlet and the liquid cooling medium outlet are communicated with the liquid cooling device in the vehicle's battery pack; The high-voltage connector includes a connecting aluminum rod. The heat dissipation pipe covers a part of the outer wall of the connecting aluminum rod and exchanges liquid cooling heat with the connecting aluminum rod.

2. The high-voltage connector assembly according to claim 1, characterized in that, The extending direction of the heat dissipation channel is perpendicular to the axial direction of the connecting aluminum rod; And / or, the heat dissipation pipe is located inside the battery pack.

3. The high-voltage connector assembly according to claim 1, wherein The heat dissipation pipe includes a first pipe section, an arc pipe section and a second pipe section which are sequentially connected and communicated. The first pipe section and the second pipe section are located on opposite sides of the connecting aluminum rod. The liquid cooling medium inlet is arranged at one end of the first pipe section far away from the arc pipe section, and the liquid cooling medium outlet is arranged at one end of the second pipe section far away from the arc pipe section.

4. The high-voltage connector assembly according to claim 3, characterized in that, There is a smooth transition between the first pipe section and the arc pipe section; And / or, there is a smooth transition between the second pipe section and the arc pipe section; And / or, the inner contour of the arc pipe section is adapted to the outer contour of the connecting aluminum rod.

5. The high-voltage connector assembly according to claim 3, wherein The connecting aluminum rod at least includes a first sub-aluminum rod and a second sub-aluminum rod which are sequentially arranged along the direction perpendicular to the axial direction of the connecting aluminum rod; The position of the first pipe section corresponding to the gap between the first sub-aluminum rod and the second sub-aluminum rod protrudes towards the direction close to the second pipe section to form a first extending convex part, and the first extending convex part extends into the gap; and / or, the position of the second pipe section corresponding to the gap between the first sub-aluminum rod and the second sub-aluminum rod protrudes towards the direction close to the first pipe section to form a second extending convex part, and the second extending convex part extends into the gap.

6. The high-voltage connector assembly according to any one of claims 1 to 5, characterized in that, The high-voltage connector assembly further includes a heat conduction block assembly. The heat conduction block assembly is located between the connecting aluminum rod and the liquid cooling device of the battery pack, and the heat conduction block assembly is in contact with and conducts heat to the connecting aluminum rod and the liquid cooling device respectively.

7. The high-voltage connector assembly according to claim 6, wherein, Along the axial direction of the connecting aluminum rod, the connecting aluminum rod includes a first connecting end and a second connecting end which are oppositely arranged. The first connecting end is located inside the battery pack and is used for connecting with the wire harness inside the high-voltage connector, and the second connecting end is located outside the battery pack and is used for connecting with the wire harness outside the high-voltage connector; The heat conduction block assembly is arranged between the first connecting end and the liquid cooling device.

8. The high-voltage connector assembly according to claim 7, characterized in that, The heat conduction block assembly includes a heat conduction insulating film, a heat conduction pad and a heat conduction block which are sequentially arranged. The heat conduction insulating film is attached to the bottom surface of the first connecting end, the heat conduction pad is arranged on the side of the heat conduction insulating film far away from the first connecting end, and the heat conduction block is arranged on the side of the heat conduction pad far away from the heat conduction insulating film and is attached to the liquid cooling device.

9. The high-voltage connector assembly according to any one of claims 1 to 5, characterized in that, Along the axial direction of the connecting aluminum bar, the connecting aluminum bar includes a first connecting end and a second connecting end which are oppositely arranged. The outer wall surface of the first connecting end has a first welding surface welded to the wire harness inside the high-voltage connector, and the outer wall surface of the second connecting end has a second welding surface welded to the wire harness outside the high-voltage connector.

10. A battery pack, characterized in that, It includes a liquid cooling device and the high-voltage connector assembly according to any one of claims 1 to 9.

11. A vehicle, characterized in that, It includes a battery pack and the high-voltage connector assembly according to any one of claims 1 to 9 or includes the battery pack according to claim 10.

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