Vacuum metallurgical bonding tooling jig for liquid cooled units

Abstract

The utility model discloses a kind of vacuum metallurgy combination tooling clamps for liquid cooling unit, including bottom plate, top plate is connected on the bottom plate, installation layer is formed between the top plate and bottom plate, liquid cooling unit is provided in the installation layer, low expansion fixed assembly is connected on the top plate, perforation is provided on the top plate, high expansion pressure head is connected on the side of low expansion fixed assembly close to liquid cooling unit, high expansion pressure head is set corresponding to perforation position, high expansion pressure head abuts liquid cooling unit.The utility model provides a kind of vacuum metallurgy combination tooling clamps for liquid cooling unit, by selecting the material combination of different thermal expansion coefficients, the pressure generated by thermal expansion difference is used to replace traditional rigid clamping structure, the effect of self-adapting compression in metallurgical combination process is realized.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling unit technology, and in particular to a vacuum metallurgical bonding tooling fixture for liquid cooling units. Background Technology

[0002] As a core component for heat dissipation in power batteries and electronic devices, liquid cooling units typically require the welding of multiple metal sheets together using a vacuum metallurgical bonding process. Traditional vacuum metallurgical bonding fixtures for liquid cooling units often employ a rigid clamping structure with stainless steel plates and screws and nuts for locking.

[0003] For example, publication number "CN221928281U" discloses a "battery pack, energy storage device, and energy storage system." The lower casing and upper cover are assembled to form an accommodating space, where the battery pack is placed. The lower casing includes a base plate and side plates surrounding and connected to the base plate, with a first through hole in each side plate. A liquid cooling unit is located on the base plate and has a liquid cooling cavity. A liquid cooling connector has a first end and a second end that communicate with each other; the first end passes through the first through hole, and the second end is installed in the liquid cooling unit and communicates with the liquid cooling cavity. A sealing mechanism is located on the liquid cooling connector and presses against the side plate, so that the sealing mechanism surrounds the outer peripheral wall of the side facing the battery pack from the first through hole. A support base abuts against the sealing mechanism and the liquid cooling unit. However, in practical applications, problems exist such as deformation of the liquid cooling unit due to differences in thermal expansion coefficients and uncontrollable metallurgical bonding pressure. Summary of the Invention

[0004] In view of the problems mentioned in the background art regarding the extrusion deformation of liquid cooling units under thermal expansion and the uncontrollable metallurgical bonding pressure, this utility model provides a vacuum metallurgical bonding tooling fixture for liquid cooling units. By selecting a combination of materials with different coefficients of thermal expansion, the pressure generated by the difference in thermal expansion is used to replace the traditional rigid clamping structure, thereby achieving an adaptive clamping effect during the metallurgical bonding process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A vacuum metallurgical bonding fixture for a liquid cooling unit includes a base plate, a top plate connected to the base plate, a mounting layer formed between the top plate and the base plate, a liquid cooling unit disposed within the mounting layer, a low-expansion fixing component connected to the top plate, a through hole provided on the top plate, a high-expansion pressure head connected to the side of the low-expansion fixing component near the liquid cooling unit, the high-expansion pressure head being positioned corresponding to the through hole, and the high-expansion pressure head abutting against the liquid cooling unit. In the prior art, the connectors for connecting liquid cooling units cannot adapt to the connection of the liquid cooling unit under thermal expansion and contraction. Therefore, in this application, an installation layer is provided between the top plate and the bottom plate, so that there is space between the top plate and the bottom plate to accommodate the liquid cooling unit. Thus, the liquid cooling unit is in a state where it is connected to the top plate above and the bottom plate below. A perforation is provided on the top plate, and a low-expansion fixing component is also provided on the top plate. The material of the low-expansion fixing component is preferably molybdenum with a low coefficient of expansion, so that the deformation of the low-expansion fixing component is small during the welding process and the structural state is more stable. A high-expansion pressure head is connected to the low-expansion fixing component. The high-expansion pressure head is more likely to deform and expand under heat. The high-expansion pressure head is connected to the low-expansion fixing component and is arranged to be aligned with the perforation. Thus, when heated, the high-expansion pressure head can exert downward pressure on the liquid cooling unit connected to the high-expansion pressure head, thereby ensuring the stability of the liquid cooling unit during the welding process and the tightness of the connection between the metal plates during the metallurgical process, so as to generate an adaptive clamping effect.

[0007] Preferably, the liquid cooling unit is equipped with a liquid cooling head, which passes through a perforation and abuts against the high expansion head. The liquid cooling head circulates the coolant, and therefore protrudes from the main body of the liquid cooling unit. The liquid cooling head can pass through the perforation and abut against the high expansion head, allowing the downward pressure generated by the high expansion head to be applied to the main body of the liquid cooling unit. The liquid cooling head has a pagoda-like structure, ensuring reliable connection between the liquid cooling head and the piping.

[0008] Preferably, the base plate is provided with a grid groove. The grid groove on the base plate creates several crisscrossing ribs, which can improve the structural strength of the base plate and prevent structural deformation under high temperature environments. Furthermore, the grid groove can increase the heat dissipation area of ​​the base plate, thereby enabling more effective heat dissipation and airflow guidance.

[0009] Preferably, the base plate is provided with several fixing columns, which connect to and elevate the top plate. The fixing columns on the base plate, with the top plate connected to it, elevate the top plate relative to the base plate, allowing the liquid cooling unit to be positioned in the area between the top and bottom plates. This sandwiches the liquid cooling unit between the top and bottom plates, ensuring the stability of the connections between the components.

[0010] Preferably, the low-expansion fixing assembly includes connecting feet that pass through the top plate and connect to the fixing post. The low-expansion fixing assembly is provided with connecting feet; in this application, two connecting feet are provided, each connected to the top plate, and the connecting feet are also connected to the fixing post. Preferably, the connection between the connecting feet, the top plate, and the fixing post is a threaded connection, where bolts pass through the connecting feet and the top plate to connect to the fixing post.

[0011] Preferably, a pressure frame is provided on the side of the top plate near the bottom plate, and the pressure frame is engaged with the edge of the liquid cooling unit. The pressure frame on the top plate, located on the side near the bottom plate, allows the pressure frame to engage with the liquid cooling unit after the metal plates are connected, thereby limiting and constraining the liquid cooling unit and ensuring its stability. This prevents the top cover of the liquid cooling unit from shifting or tilting due to solder flow during the welding process.

[0012] Preferably, the base plate is provided with corner positioning posts, each including a folded positioning edge that engages with the liquid cooling unit. The corner positioning posts are located at the corners of the area connecting the liquid cooling unit, allowing the folded positioning edges of the posts to engage with the corner areas of the liquid cooling unit, thus providing a limiting and constraining effect and improving the stability of the liquid cooling unit.

[0013] Preferably, a graphene gasket is provided between the liquid cooling unit and the base plate. The gasket is made of graphene and is used to prevent the pressure caused by thermal expansion during the welding process from damaging the bottom surface of the liquid cooling unit. At the same time, graphene has better thermal conductivity, reducing the impact of temperature on the welding quality of the liquid cooling unit.

[0014] Preferably, the top plate is provided with a grid of reinforcing ribs. The grid of reinforcing ribs on the top plate improves the structural strength and stability during welding. Multiple reinforcing ribs are provided, forming various grid structures to prevent structural deformation under high-temperature conditions and enhance structural strength.

[0015] Preferably, the low-expansion fixing assembly includes a positioning groove located near the base plate, and the high-expansion pressure head is disposed within the positioning groove. The positioning groove on the low-expansion fixing assembly connects to the high-expansion pressure head, ensuring that the high-expansion pressure head is relatively fixed in position relative to the low-expansion fixing assembly. During thermal expansion, the high-expansion pressure head generates downward pressure, preventing positional displacement and ensuring that the downward pressure is precisely applied to the liquid cooling unit.

[0016] The beneficial effects of this utility model are as follows: (1) By using materials with different coefficients of thermal expansion, it is possible to apply downward pressure to the liquid cooling unit during the welding heating process, thereby ensuring the stability of the liquid cooling unit and improving the tightness of the connection between the various metal plates; (2) By setting corner positioning posts and pressure plate frames, the position of the liquid cooling unit is limited and fixed to ensure the stability of the liquid cooling unit and facilitate assembly and positioning. Attached Figure Description

[0017] Figure 1 This is the first exploded view of this utility model.

[0018] Figure 2 This is the second exploded view of this utility model.

[0019] In the picture: 1. Base plate, 11. Grid groove, 12. Fixing post, 13. Corner positioning post, 131. Folded corner positioning edge; 2. Top plate, 21. Perforation, 22. Pressure plate frame, 23. Mesh reinforcement rib; 3 mounting layers; 4 liquid cooling units, 41 liquid cooling blocks; 5 Low-expansion fixing component, 51 High-expansion pressure head, 52 Connecting foot, 53 Positioning groove; 6. Graphene gaskets. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1: like Figure 1As shown, a vacuum metallurgical bonding fixture for a liquid cooling unit 4 includes a base plate 1, a top plate 2 connected to the base plate 1, an installation layer 3 formed between the top plate 2 and the base plate 1, a liquid cooling unit 4 disposed in the installation layer 3, a low expansion fixing component 5 connected to the top plate 2, a through hole 21 provided on the top plate 2, a high expansion pressure head 51 connected to the side of the low expansion fixing component 5 near the liquid cooling unit 4, the high expansion pressure head 51 being disposed corresponding to the position of the through hole 21, and the high expansion pressure head 51 abutting against the liquid cooling unit 4. In the prior art, the connectors for the liquid cooling unit 4 cannot adapt to the connection of the liquid cooling unit 4 under thermal expansion and contraction. Therefore, in this application, an mounting layer 3 is provided between the top plate 2 and the bottom plate 1, so that a space capable of accommodating the liquid cooling unit 4 is provided between the top plate 2 and the bottom plate 1. Thus, the liquid cooling unit 4 is in a state where it is connected to the top plate 2 above and the bottom plate below. Furthermore, a perforation 21 is provided on the top plate 2, and a low-expansion fixing component 5 is also provided on the top plate 2. The material of the low-expansion fixing component 5 is preferably molybdenum with a low coefficient of thermal expansion, so that during the welding process, the low-expansion fixing component 5... The deformation is smaller and the structural state is more stable. The high expansion pressure head 51 is connected to the low expansion fixing component 5. The high expansion pressure head 51 is more likely to deform and expand when heated. The high expansion pressure head 51 is connected to the low expansion fixing component 5 and is set to be aligned with the perforation 21. This allows the high expansion pressure head 51 to exert downward pressure on the liquid cooling unit 4 connected to the high expansion pressure head 51 when heated. This ensures the stability of the liquid cooling unit 4 during the welding process and the tightness of the connection between the metal plates during the metallurgical process, thereby enabling the adaptive pressing effect.

[0022] Liquid cooling plates, as core components for heat dissipation in power batteries and electronic devices, typically require the welding of multiple metal sheets together using a vacuum metallurgical bonding process. Traditional vacuum metallurgical bonding fixtures for liquid cooling plates often employ rigid clamping structures using stainless steel plates and screws and nuts for locking. These structures suffer from problems such as deformation due to differences in thermal expansion coefficients, cumbersome operation, and uncontrollable metallurgical bonding pressure. While existing technologies have attempted improvements using elastic elements or low-expansion materials, they still cannot avoid high-temperature stress relaxation or the limitations of single-material performance. This application addresses this issue by designing a combination of materials with different thermal expansion coefficients, utilizing the pressure generated by these differences to replace the traditional rigid clamping structure. This aims to reduce deformation and damage to the liquid cooling unit at high temperatures, achieving adaptive clamping and process simplification during metallurgical bonding.

[0023] Example 2: like Figure 1 , 2As shown, a vacuum metallurgical bonding fixture for a liquid cooling unit 4 includes a base plate 1, a top plate 2 connected to the base plate 1, a mounting layer 3 formed between the top plate 2 and the base plate 1, a liquid cooling unit 4 disposed within the mounting layer 3, a low-expansion fixing component 5 connected to the top plate 2, a through hole 21 provided on the top plate 2, a high-expansion pressure head 51 connected to the side of the low-expansion fixing component 5 near the liquid cooling unit 4, the high-expansion pressure head 51 being positioned corresponding to the through hole 21, and abutting against the liquid cooling unit 4. A liquid cooling head 41 is provided on the liquid cooling unit 4, passing through the through hole 21 and abutting against the high-expansion pressure head 51. The low-expansion fixing component 5 includes a positioning groove 53 provided near the base plate 1, and the high-expansion pressure head 51 is disposed within the positioning groove 53.

[0024] In the prior art, the connectors for the liquid cooling unit 4 cannot adapt to the connection of the liquid cooling unit 4 under thermal expansion and contraction. Therefore, in this application, an mounting layer 3 is provided between the top plate 2 and the bottom plate 1, so that a space capable of accommodating the liquid cooling unit 4 is provided between the top plate 2 and the bottom plate 1. Thus, the liquid cooling unit 4 is in a state where it is connected to the top plate 2 above and the bottom plate below. Furthermore, a perforation 21 is provided on the top plate 2, and a low-expansion fixing component 5 is also provided on the top plate 2. The material of the low-expansion fixing component 5 is preferably molybdenum with a low coefficient of thermal expansion, so that during the welding process, the low-expansion fixing component 5... The deformation is smaller and the structural state is more stable. The high expansion pressure head 51 is connected to the low expansion fixing component 5. The high expansion pressure head 51 is more likely to deform and expand when heated. The high expansion pressure head 51 is connected to the low expansion fixing component 5 and is set to be aligned with the perforation 21. This allows the high expansion pressure head 51 to exert downward pressure on the liquid cooling unit 4 connected to the high expansion pressure head 51 when heated. This ensures the stability of the liquid cooling unit 4 during the welding process and the tightness of the connection between the metal plates during the metallurgical process, thereby enabling the adaptive pressing effect.

[0025] The liquid cooling unit 4 is equipped with a liquid cooling head 41, through which the coolant circulates. Therefore, the liquid cooling head 41 protrudes relative to the main body of the liquid cooling unit 4. The liquid cooling head 41 can pass through the perforation 21 and abut against the high expansion head 51, allowing the downward pressure generated by the high expansion head 51 to be applied to the main body of the liquid cooling unit 4 through the liquid cooling head 41. The liquid cooling head 41 has a pagoda structure, thus ensuring the reliability of the connection between the liquid cooling head 41 and the piping.

[0026] The low expansion fixing component 5 is provided with a positioning groove 53, which can connect to the high expansion pressure head 51, so that the high expansion pressure head 51 is relatively fixed relative to the low expansion fixing component 5. When heated and expanded, the high expansion pressure head 51 generates downward pressure, avoiding the high expansion pressure head 51 from shifting position and ensuring that the downward pressure is accurately applied to the liquid cooling unit 4.

[0027] Example 3: like Figure 1 As shown, a grid groove 11 is provided on the base plate 1. The grid groove 11 on the base plate 1 forms several crisscrossing ribs on the base plate 1. Each rib can improve the structural strength of the base plate 1 and prevent the base plate 1 from deforming under high temperature environment; and the grid groove 11 can increase the heat dissipation area of ​​the base plate 1, thereby enabling more effective heat dissipation and airflow guidance.

[0028] like Figure 1 As shown, a number of fixing columns 12 are provided on the base plate 1, and the fixing columns 12 are connected to and elevate the top plate 2. The fixing columns 12 are provided on the base plate 1, and the top plate 2 is connected to the base plate 1 through the fixing columns 12. The fixing columns 12 make the top plate 2 higher than the base plate 1, so that the liquid cooling unit 4 can be placed in the area between the top plate 2 and the base plate 1. The top plate 2 and the base plate 1 clamp the liquid cooling unit 4 in the middle area, thereby ensuring the connection stability between the various components.

[0029] like Figure 1 As shown, the low-expansion fixing component 5 includes a connecting foot 52, which passes through the top plate 2 and connects to the fixing post 12. The low-expansion fixing component 5 is provided with connecting feet 52. In this application, two connecting feet 52 are provided, each connected to the top plate 2, and the connecting feet 52 are also connected to the fixing post 12. Preferably, the connection between the connecting feet 52, the top plate 2, and the fixing post 12 is a threaded connection, where bolts pass through the connecting feet 52 and the top plate 2 to connect to the fixing post 12.

[0030] like Figure 2 As shown, a pressure frame 22 is provided on the side of the top plate 2 near the bottom plate 1, and the pressure frame is engaged with the edge of the liquid cooling unit 4. The pressure frame 22 is located on the side of the top plate 2 closest to the bottom plate 1. When the metal plates are connected together, the pressure frame 22 can engage with the liquid cooling unit 4, thereby limiting and constraining the liquid cooling unit 4 and ensuring its stability. This is used to prevent the positional displacement and angular tilt of the top cover of the liquid cooling unit 4 caused by the flow of solder during the welding process.

[0031] like Figure 1 As shown, a corner positioning post 13 is provided on the base plate 1. The corner positioning post 13 includes a folded positioning edge 131, which engages with the liquid cooling unit 4. The corner positioning post 13 is located at the corner of the area connecting the liquid cooling unit 4, allowing the folded positioning edge 131 of the corner positioning post 13 to engage with the corner area of ​​the liquid cooling unit 4, thereby achieving a limiting constraint effect on the liquid cooling unit 4 and improving its stability.

[0032] like Figure 1 As shown, a graphene gasket 6 is provided between the liquid cooling unit 4 and the base plate 1. The gasket is made of graphene and is used to prevent the pressure caused by thermal expansion during the welding process from damaging the bottom surface of the liquid cooling unit 4. At the same time, graphene has better thermal conductivity, reducing the impact of temperature on the welding quality of the liquid cooling unit 4.

[0033] like Figure 1 As shown, the top plate 2 is provided with grid reinforcing ribs 23. The grid reinforcing ribs 23 on the top plate 2 can improve the structural strength of the top plate 2 and the structural stability during the welding process. Multiple grid reinforcing ribs 23 are provided, thus forming various grid structures to prevent structural deformation under high temperature environment and improve structural strength.

[0034] In this embodiment, in addition to the structural features described above, it also includes a base plate 1, a top plate 2 connected to the base plate 1, an mounting layer 3 formed between the top plate 2 and the base plate 1, a liquid cooling unit 4 disposed within the mounting layer 3, a low-expansion fixing component 5 connected to the top plate 2, a through hole 21 provided on the top plate 2, a high-expansion pressure head 51 connected to the side of the low-expansion fixing component 5 near the liquid cooling unit 4, the high-expansion pressure head 51 being positioned corresponding to the through hole 21, and abutting against the liquid cooling unit 4. A liquid cooling head 41 is provided on the liquid cooling unit 4, passing through the through hole 21 and abutting against the high-expansion pressure head 51. The low-expansion fixing component 5 includes a positioning groove 53 provided near the base plate 1, and the high-expansion pressure head 51 is disposed within the positioning groove 53.

[0035] The specific structure in this embodiment is as follows: In this embodiment, six fixing posts are provided on the base plate 1, four of which are located at the corners, and the remaining two are located in the middle. The top plate 2 is connected to the six fixing posts by bolts. The top plate 2 is provided with crisscrossing grid reinforcement ribs, which divide the top plate 2 into several grid structures. The six fixing posts are connected to the grid structures in a staggered manner. A low-expansion fixing component is connected to the top plate 2. The low-expansion fixing component is a handle structure with connecting feet at both ends. The connecting feet are respectively located on the two fixing posts in the middle positions. Bolts are connected to the connecting feet and threadedly connected to the fixing posts through the top plate 2. Two through holes are provided in the middle grid of the top plate 2. The through holes are elongated structures. A pagoda tube and a connector are provided on the liquid cooling head. The connector is rectangular to facilitate contact with the high-expansion pressure head. The axial extension direction of the pagoda tube is consistent with the extension direction of the through hole, and the size of the through hole is larger than the size of the pagoda tube. The dimensions are designed to facilitate subsequent connection of the pagoda-shaped pipe to the tubing. Two bolts are positioned in the middle of the low-expansion fixing component, passing through it and connecting to the high-expansion pressure head. A positioning groove is provided on the side of the low-expansion fixing component near the base plate 1, its shape matching the shape of the high-expansion pressure head to ensure its stable position. A pressure plate frame is provided on one side of the bottom surface of the top plate 2, its dimensions matching the plate-like structure of the liquid cooling unit, thus enabling the plate-like structure of the liquid cooling unit to be securely connected to the pressure plate. On the plate frame, a graphene gasket is provided at the bottom of the liquid cooling unit for fixation and positioning. A grid groove is provided at the corresponding position on the base plate 1. The area with the grid groove is larger than the dimensions of the graphene gasket and the liquid cooling unit. Corner positioning posts are provided at the four corners of the area with the grid groove. These corner positioning posts are L-shaped, forming angled positioning edges that fit and abut against the edges of the graphene gasket and the liquid cooling unit, thereby fixing and positioning them. Both the top plate 2 and the base plate 1 are made of 310S stainless steel, the low-expansion fixing component is made of molybdenum, and the high-expansion pressure head is made of copper.

Claims

1. A vacuum metallurgical bonding tooling fixture for a liquid cooling unit, characterized in that, It includes a base plate, a top plate connected to the base plate, an installation layer formed between the top plate and the base plate, a liquid cooling unit disposed in the installation layer, a low expansion fixing component connected to the top plate, a perforation provided on the top plate, a high expansion pressure head connected to the side of the low expansion fixing component near the liquid cooling unit, the high expansion pressure head being disposed corresponding to the perforation position, and the high expansion pressure head abutting against the liquid cooling unit.

2. The vacuum metallurgical bonding tooling fixture for a liquid cooling unit according to claim 1, characterized in that, The liquid cooling unit is equipped with a liquid cooling head, which passes through a perforation and abuts against a high expansion pressure head.

3. The vacuum metallurgical bonding tooling fixture for a liquid cooling unit according to claim 1, characterized in that, The base plate is provided with a grid groove.

4. The vacuum metallurgical bonding tooling fixture for a liquid cooling unit according to claim 1, characterized in that, Several fixed columns are provided on the base plate, and the fixed columns are connected to and elevate the top plate.

5. A vacuum metallurgical bonding tooling fixture for a liquid cooling unit according to claim 4, characterized in that, The low-expansion fixing assembly includes a connecting foot that passes through the top plate and connects to the fixing post.

6. A vacuum metallurgical bonding tooling fixture for a liquid cooling unit according to claim 1, characterized in that, A pressure plate frame is provided on the side of the top plate near the bottom plate, and the pressure plate frame is snapped into the edge of the liquid cooling unit.

7. A vacuum metallurgical bonding tooling fixture for a liquid cooling unit according to claim 1, characterized in that, The base plate is provided with corner positioning posts, each corner positioning post including a folded positioning edge, which engages with the liquid cooling unit.

8. A vacuum metallurgical bonding tooling fixture for a liquid cooling unit according to claim 1, characterized in that, A graphene gasket is provided between the liquid cooling unit and the base plate.

9. A vacuum metallurgical bonding tooling fixture for a liquid cooling unit according to any one of claims 1-8, characterized in that, The top plate is provided with a grid of reinforcing ribs.

10. A vacuum metallurgical bonding tooling fixture for a liquid cooling unit according to any one of claims 1-8, characterized in that, The low-expansion fixing component includes a positioning groove located near the base plate, and the high-expansion pressure head is located within the positioning groove.

Images