Sealing structure of integrated liquid extrusion cooling system

Abstract

The utility model relates to the field of design of sealing structures of liquid cooling heat dissipation systems, and discloses an integrated liquid extrusion cooling system sealing structure which comprises a water cooling bottom plate, a connecting side plate is welded to one end of the water cooling bottom plate, a transition box is welded to the top wall of the water cooling bottom plate in a manner of being attached to the connecting side plate, and the transition box communicates with the water cooling bottom plate. A water inlet nozzle and a water outlet nozzle communicating with the transition box are welded to the side wall, away from the water cooling bottom plate, of the connecting side plate. The liquid cooling plate connector has the stable effect of improving long-term sealing of the liquid cooling plate connector.

Description

Technical Field

[0001] The present application relates to the field of sealing structure design of liquid cooling and heat dissipation systems, and in particular to an integrated extruded liquid cooling system sealing structure. Background Art

[0002] New energy battery liquid cooling plates are key components in the thermal management system for new energy vehicles. They control the temperature of the battery pack and ensure that the batteries operate within their optimal operating temperature range. The liquid cooling plates circulate coolant within the plates, absorbing heat generated by the batteries during operation. This maintains a stable battery temperature and improves battery efficiency, safety, and lifespan.

[0003] In existing technology, the connectors of new energy battery liquid cooling plates are typically connected to the pipes or ports of the liquid cooling plate via threads, and a sealing ring or sealing tape is used to ensure sealing. However, if the threaded connection is not tightened or becomes loose during use, the seal between the connector and the pipe will be reduced, causing leakage. Moreover, after long-term use of the liquid cooling plate, the sealing ring may wear, age, or be damaged, resulting in a decrease in sealing performance and leakage. Utility Model Content

[0004] In order to improve the long-term sealing stability of the liquid cooling plate joint, the present application provides an integrated extruded liquid cooling system sealing structure.

[0005] The sealing structure of the integrated extrusion liquid cooling system provided in this application adopts the following technical solutions:

[0006] The integrated extruded liquid cooling system sealing structure includes a water-cooled base plate, one end of which is welded with a connecting side plate, and a transition box is welded on the top wall of the water-cooled base plate in contact with the connecting side plate. The transition box is connected to the water-cooled base plate, and a water inlet and outlet connected to the transition box are welded on the side wall of the connecting side plate facing away from the water-cooled base plate.

[0007] By adopting the above technical solution, the sealing structure of the integrated extruded liquid cooling system can effectively improve the sealing stability of the liquid cooling system, and the sealing structure can be frequently tested for sealing performance through helium testing, which greatly reduces the leakage problem caused by loose threaded connections or aging of sealing rings during use, improves the stable circulation of coolant in the water-cooled base plate, and extends the service life of the liquid cooling system.

[0008] Optionally, independent water inlet chambers and water outlet chambers are distributed in the transition box in a direction parallel to its own width. The top of the transition box is connected to the water inlet chamber and the water inlet nozzle and is welded with a water inlet box. The top of the transition box is connected to the water outlet chamber and the water outlet nozzle and is welded with a water outlet box.

[0009] By adopting the above technical solution, independent water inlet chamber and water outlet chamber are set in the transition box, and are connected to the water inlet nozzle and water outlet nozzle respectively through the water inlet box and water outlet box at the top, thereby realizing effective separation and circulation of the coolant, enhancing the sealing and stability of the liquid cooling system, and effectively avoiding the occurrence of leakage problems.

[0010] Optionally, a plurality of partitions are arranged inside the water-cooled base plate in a direction parallel to its own width, and the plurality of partitions are arranged parallel to the length direction of the water-cooled base plate, and separate the water-cooled base plate into a plurality of independent cooling chambers, and each of the cooling chambers is connected to the water inlet chamber and has a water inlet hole, and each of the cooling chambers is connected to the water outlet chamber and has a water outlet hole.

[0011] By adopting the above technical solution, the cooling water flows through the interior of the water-cooled base plate cavity under the guidance of the partition, thereby increasing the contact area for heat exchange between the coolant and the top wall of the water-cooled base plate, which not only improves the flow efficiency of the coolant, but also enhances the overall heat dissipation effect.

[0012] Optionally, a plurality of heat conducting plates are provided in each cooling chamber parallel to the partition, the plurality of heat conducting plates are distributed along the width direction of the cooling chamber, and a gap is left between the end of the plurality of heat conducting plates away from the connection side plate and the inner side wall of the water-cooled bottom plate, and a guide channel is formed between each two adjacent heat conducting plates. The water inlet (15) and the water outlet (16) are both Waist-shaped setting , and each of them is connected to multiple diversion channels.

[0013] By adopting this technical solution, the heat transfer plates installed in each cooling chamber enhance the heat exchange efficiency between the coolant and the water-cooled baseplate, improving the heat dissipation performance of the entire liquid cooling system. The heat transfer plates allow the coolant to flow smoothly, further improving the heat exchange effect and ensuring stable operation of the battery pack within the optimal operating temperature range. The waist-shaped inlet and outlet holes help to evenly distribute the coolant within each diversion channel, further improving the cooling effect.

[0014] Optionally, sealing plug strips are provided at both ends of the water-cooling base plate, and the sealing plug strips include a sealing plug strip inserted into the opening of the side wall of the water-cooling base plate and a sealing end strip arranged on the side of the sealing strip facing away from the water-cooling base plate, the sealing end strip abuts against the side wall of the water-cooling base plate, and the sealing plug strip is plugged into and fitted with the opening of the side wall of the water-cooling base plate, the sealing end strip is highly matched with the water-cooling base plate, and the sealing plug strip close to the connecting side plate is abutted against the connecting side plate.

[0015] By adopting the above technical solution, the sealing plugs at both ends of the water-cooling base plate effectively improve the sealing performance of the overall structure, avoiding the problem of coolant leakage due to loose sealing during long-term use, thereby ensuring the efficient and stable operation of the cooling system.

[0016] Optionally, the connection between the blocking end strip and the water-cooled bottom plate, and the connection between the connecting side plate and the bottom wall of the blocking end strip are both welded by stir friction welding.

[0017] By adopting the above-mentioned technical solution, during the friction stir welding process, the material is stirred and extruded in a plastic state without melting. Since the material does not melt during the welding process, the microstructure of the weld is more uniform, and the strength and toughness are generally better than those of fusion welding welds. The residual stress in the weld area is also lower, thus avoiding the common problems of cracking, porosity, and heat-affected zone hardening in fusion welding, and greatly reducing welding deformation and the size of the heat-affected zone. By friction stir welding the connection between the sealing end strip and the water-cooled bottom plate, and the connection between the connecting side plate and the bottom wall of the sealing end strip, while maintaining a high sealing effect, the flatness of the bottom wall of the new energy battery liquid cooling plate and the top wall where the batteries are placed can be improved, thereby further improving the stability of the sealing structure of the integrated extruded liquid cooling system.

[0018] Optional, The water inlet (4) and the water outlet (5) The connection with the connecting side plate (3), Water inlet box (7) and water outlet Box (8) The connection with the transition box (6), and the connection between the transition box (6), the water-cooled bottom plate (1) and the blocking end strip (22) are all welded by arc welding.

[0019] By adopting the above technical solution, the arc welding equipment is relatively simple and flexible to operate, and is suitable for various welding positions, such as flat welding, vertical welding, horizontal welding, and overhead welding. In addition, the arc welding speed is relatively fast, and it can quickly complete large-area welding work, thereby improving production efficiency. At the same time, arc welding can weld materials of various thicknesses from thin plates to thick plates, with a large welding thickness range. Without emphasizing the requirement for flatness, arc welding can be used to weld the joints between the water inlet and outlet nozzles and the connecting side panels, the joints between the water inlet and outlet boxes and the transition box, and the joints between the transition box and the water-cooled bottom plate and the blocking end strips. This can significantly improve the connection strength and sealing between the various components, improve production efficiency, and thus ensure the long-term stable operation of the liquid cooling system.

[0020] Optionally, both ends of the blocking end strip extending out of the transition box are chamfered toward the side connected to the side plate.

[0021] By adopting the above technical solution, during the actual production process, when the liquid cooling plate was subjected to helium inspection, the ends of the sealing end strips were prone to air leakage. After investigation, it was concluded that, firstly, the side of the liquid cooling plate was severely polished, resulting in insufficient penetration, which made the welding of the liquid cooling plate assembly prone to burn-through leakage. Secondly, the weld seam after the stir friction welding at the bottom of the water-cooled base plate and the edge of the stir friction weld at the junction of the water-cooled base plate and the sealing end strip overlapped. After actual improvement operations, a solution was found, namely, both ends of the sealing end strip extending out of the transition box were chamfered at about 50 degrees toward the side of the connecting side plate. During the welding process, a heat-conducting brass block was added to the side wall of the connecting side plate facing away from the weld. This can reduce the air leakage at both ends of the sealing end strip, thereby improving the sealing effect of the liquid cooling plate sealing structure.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The integrated extruded liquid cooling system sealing structure can effectively improve the sealing stability of the liquid cooling system. This sealing structure can be frequently tested for sealing performance through helium testing, greatly reducing leakage problems caused by loose threaded connections or aging of sealing rings during use. It also improves the stable circulation of coolant within the water-cooled baseplate and extends the service life of the liquid cooling system.

[0024] 2. Independent water inlet and outlet chambers are set up in the transition box, and are connected to the water inlet and outlet nozzles respectively through the water inlet box and water outlet box at the top, realizing the effective separation and circulation of the coolant, enhancing the sealing and stability of the liquid cooling system, and effectively avoiding the occurrence of leakage problems;

[0025] 3. Multiple partitions separate the water-cooled base into several independent cooling chambers. Each cooling chamber is connected to the water inlet and outlet chambers. Guided by the partitions, the cooling water flows fully through the interior of the water-cooled base chamber, increasing the contact area for heat exchange between the coolant and the top wall of the water-cooled base. This not only improves the flow efficiency of the coolant, but also enhances the overall heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram showing the positional relationship between the transition box and the water-cooled base plate in an embodiment of the present application.

[0028] Figure 3 It is a cross-sectional view showing the internal structure of the water-cooling base plate in an embodiment of the present application.

[0029] Figure 4 It is a structural schematic diagram of the water-cooled base plate in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. Water-cooled base plate; 11. Partition; 12. Cooling chamber; 13. Heat conduction plate; 14. Diversion channel; 15. Water inlet hole; 16. Water outlet hole; 2. Sealing plug strip; 21. Sealing insert; 22. Sealing end strip; 221. Chamfer; 3. Connecting side plate; 4. Water inlet nozzle; 5. Water outlet nozzle; 6. Transition box; 61. Water inlet cavity; 62. Water outlet cavity; 7. Water inlet box; 8. Water outlet box. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The embodiments of the present application disclose a sealing structure for an integrated extrusion liquid cooling system.

[0034] Reference Figure 1 and Figure 2 The sealing structure of the integrated extruded liquid cooling system includes a water-cooled base plate 1, with sealing plugs 2 fixedly installed at both ends of the water-cooled base plate 1. A connecting side plate 3 is fixedly installed on the side of one of the sealing plugs 2 facing away from the water-cooled base plate 1. A water inlet nozzle 4 and a water outlet nozzle 5 are fixedly penetrated on the side wall of the connecting side plate facing away from the base plate. A transition box 6 is provided on the top wall of the water-cooled base plate 1 in contact with the connecting side plate 3, and the transition box 6 is connected to the water-cooled base plate 1. Independent water inlet chambers 61 and water outlet chambers 62 are distributed in the transition box 6 along a direction parallel to its own width. A water inlet box 7 connecting the water inlet chamber 61 with the water inlet nozzle 4 is fixedly installed on the top of the transition box 6. A water outlet box 8 connecting the water outlet chamber 62 with the water outlet nozzle 5 is fixedly installed on the top of the transition box 6.

[0035] Reference Figure 1 and Figure 2 When performing a helium leak test on the sealing structure, connect the helium inlet pipe to the water inlet nozzle 4. The helium enters the water inlet box 7, the water inlet cavity 61 in the transition box 6, and the water-cooled base plate 1 in sequence from the water inlet nozzle 4. After being distributed through the inner cavity of the water-cooled base plate 1, it is output from the water outlet cavity 62 in the transition box 6, the water outlet box 8, and the water outlet nozzle 5 in sequence. At this time, the values ​​on the flow meters at the helium inlet pipe and the outlet pipe can be compared. When the output value is less than the input value, it can be determined that there is a leak or blockage. When the output value is the same as the input value, it means that it is in a sealed state. The liquid cooling plate can be regularly tested for leaks by helium leak testing.

[0036] Reference Figure 3The water-cooling baseplate 1 has a plurality of partitions 11 fixedly arranged inside the baseplate 1 along a direction parallel to its width. In this embodiment, two partitions 11 are used as an example. Both partitions 11 are arranged parallel to the length of the water-cooling baseplate 1, and separate the water-cooling baseplate 1 into three independent cooling chambers 12. Within each cooling chamber 12, a plurality of heat conducting plates 13 are fixedly arranged parallel to the partitions 11. The heat conducting plates 13 are distributed along the width of the cooling chamber 12, and a gap is left between the ends of the heat conducting plates 13 away from the connection to the side plates 3 and the inner sidewall of the water-cooling baseplate 1. A flow channel 14 is formed between each two adjacent heat conducting plates 13.

[0037] Reference Figure 1 、 Figure 3 and Figure 4 Each cooling chamber 12 is connected to the water inlet chamber 61 and is provided with a waist-shaped water inlet hole 15. The water inlet hole 15 is located on the side of the cooling chamber 12 close to the water inlet nozzle 4 and is connected to multiple diversion channels 14; each cooling chamber 12 is connected to the water outlet chamber 62 and is provided with a waist-shaped water outlet hole 16. The water outlet hole 16 is located on the side of the cooling chamber 12 close to the water outlet nozzle 5 and is connected to multiple diversion channels 14.

[0038] Reference Figure 1 and Figure 3 The sealing strip 2 includes a sealing insert 21 and a sealing end strip 22. The sealing insert 21 and the sealing end strip 22 are integrally formed. The sealing insert 21 is inserted into the opening in the side wall of the water-cooling base plate 1. The sealing end strip 22 is aligned with the side wall of the water-cooling base plate 1 in height and abuts against the side wall of the water-cooling base plate 1, ensuring that the sealing insert 21 is inserted and fitted into the opening in the side wall of the water-cooling base plate 1. The sealing strip 2 near the connecting side plate 3 is abutted against the connecting side plate 3.

[0039] Reference Figure 1 and Figure 3 In the embodiment of the present application, the connection between the blocking end strip 22 and the water-cooled bottom plate 1, and the connection between the connecting side plate 3 and the bottom wall of the blocking end strip 22 are both welded by stir friction welding. Through stir friction welding, the material is stirred and squeezed in a plastic state during the welding process without melting, ensuring a more uniform weld microstructure, reducing welding deformation, and improving the flatness of the bottom and top walls of the new energy battery liquid cooling plate.

[0040] Reference Figure 1 and Figure 3 Arc welding is used to weld the water inlet and outlet nozzles 4 and 5 to the connecting side panels 3, the water inlet and outlet boxes 7 and 8 to the transition box 6, and the transition box 6 to the water-cooled bottom plate 1 and the end-blocking strip 22. Arc welding allows for rapid welding of large areas, improving production efficiency and ensuring the strength and sealing of the connections between components, guaranteeing the long-term stable operation of the liquid cooling system.

[0041] Reference Figure 1 To improve the sealing effect of the liquid cooling plate's sealing structure, both ends of the sealing end strip 22 extending from the transition box 6 have chamfers 221 of approximately 50° toward the side connecting to the side panel 3. By providing chamfers 221 at both ends of the sealing end strip 22 and adding a heat-conducting brass block to the side wall of the connecting side panel 3 facing away from the weld, the possibility of air leakage at both ends of the sealing end strip 22 during helium testing of the liquid cooling plate can be reduced.

[0042] The sealing structure of the integrated extruded liquid cooling system in this embodiment of the present application is implemented as follows: through the rational design of the water-cooling baseplate 1, connecting side panels 3, and transition box 6, and the use of appropriate welding methods, the sealing and stability of the liquid cooling system are achieved. The transition box 6 then effectively separates the coolant and guides it into the interior of the water-cooling baseplate 1, avoiding the sealing issues that may arise from threaded connections.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. The integrated liquid cooling system sealing structure is characterized by , comprising a water-cooling base plate (1), one end of the water-cooling base plate (1) being welded with a connecting side plate (3), and a transition box (6) being welded on the top wall of the water-cooling base plate (1) and abutting against the connecting side plate (3), the transition box (6) being connected to the water-cooling base plate (1), and a water inlet nozzle (4) and a water outlet nozzle (5) connected to the transition box (6) being welded on the side wall of the connecting side plate (3) facing away from the water-cooling base plate (1).

2. The integrated extrusion liquid cooling system sealing structure according to claim 1 is characterized in that The transition box (6) has independent water inlet chambers (61) and water outlet chambers (62) distributed in a direction parallel to its own width. The top of the transition box (6) is connected to the water inlet chamber (61) and the water inlet nozzle (4) and is welded with a water inlet box (7). The top of the transition box (6) is connected to the water outlet chamber (62) and the water outlet nozzle (5) and is welded with a water outlet box (8).

3. The integrated extrusion liquid cooling system sealing structure according to claim 2 is characterized in that The water-cooling base plate (1) is provided with a plurality of partitions (11) in a direction parallel to its width. The plurality of partitions (11) are arranged parallel to the length direction of the water-cooling base plate (1) and separate the water-cooling base plate (1) into a plurality of independent cooling chambers (12). Each of the cooling chambers (12) is connected to the water inlet chamber (61) and is provided with a water inlet hole (15). Each of the cooling chambers (12) is connected to the water outlet chamber (62) and is provided with a water outlet hole (16).

4. The integrated extrusion liquid cooling system sealing structure according to claim 3 is characterized in that In each of the cooling chambers (12), a plurality of heat conducting plates (13) are arranged parallel to the partition (11). The plurality of heat conducting plates (13) are distributed along the width direction of the cooling chamber (12), and a gap is left between the end of the plurality of heat conducting plates (13) away from the connection side plate (3) and the inner side wall of the water-cooled bottom plate (1). A guide channel (14) is formed between each two adjacent heat conducting plates (13). The water inlet (15) and the water outlet (16) All are waist-shaped , and are connected to a plurality of diversion channels (14).

5. The integrated extrusion liquid cooling system sealing structure according to claim 2 is characterized in that Both ends of the water-cooling base plate (1) are provided with sealing plug strips (2), and the sealing plug strips (2) include a sealing plug strip (21) inserted into the opening of the side wall of the water-cooling base plate (1) and a sealing end strip (22) arranged on the side of the sealing strip away from the water-cooling base plate (1). The sealing end strip (22) abuts against the side wall of the water-cooling base plate (1), and the sealing plug strip (21) is plugged and matched with the opening of the side wall of the water-cooling base plate (1). The sealing end strip (22) is highly matched with the water-cooling base plate (1), and the sealing plug strip (2) close to the connecting side plate (3) is abutted against the connecting side plate (3).

6. The integrated extrusion liquid cooling system sealing structure according to claim 5 is characterized in that The connection between the blocking end strip (22) and the water-cooled bottom plate (1), and the connection between the connecting side plate (3) and the bottom wall of the blocking end strip (22) are both welded by means of stir friction welding.

7. The integrated extrusion liquid cooling system sealing structure according to claim 6 is characterized in that , The water inlet (4) and outlet Faucets (5) The connection with the connecting side plate (3), Water inlet box (7) and water outlet box (8) The connection with the transition box (6), and the connection between the transition box (6), the water-cooled bottom plate (1) and the blocking end strip (22) are all welded by arc welding.

8. The integrated extrusion liquid cooling system sealing structure according to claim 6 is characterized in that Both ends of the blocking end strip (22) extending out of the transition box (6) are provided with chamfers (221) on the side facing the connection side plate (3).

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