Water-cooling plate for integrally welding pressing rivet stud bracket and welding method of water-cooling plate

Abstract

The invention discloses a water-cooling plate for integrally welding a pressing rivet stud bracket and a welding method of the water-cooling plate, and belongs to the technical field of water-cooling plate processing. The water-cooling plate comprises a water-cooling plate main body, the water-cooling plate main body comprises a first plate piece and a second plate piece, the first plate piece is attached to the second plate piece, pressing edges are arranged on the periphery of the first plate piece and the periphery of the second plate piece, and air expansion grooves are formed in the two sides of the first plate piece and the two sides of the second plate piece. In order to solve the problems that the connecting mode of a stud support and a cross beam may affect the strength of the whole structure and a stud may loosen or break when subjected to external force, the stud support and a water cooling plate can be tightly connected together through a pressing rivet bolt brazing technology to form the whole structure, and the structure is simple and convenient. Compared with traditional mechanical connection, the connection mode is lighter and more convenient, and meanwhile it is ensured that the water cooling plate can be kept stable in various working environments.

Description

Technical Field

[0001] The invention relates to the technical field of water cooling plate processing, in particular to a water cooling plate integrally welded with a pressure riveted stud bracket and a welding method thereof. Background Art

[0002] In modern industrial design, integration, miniaturization and lightweight have become the development trend. For new energy vehicle cold plates, integrated design can reduce the number of components, reduce system complexity and cost, and improve system reliability and performance.

[0003] The water-cooling plate with integral welding of stud brackets conforms to this trend. By integrally welding the stud brackets to the water-cooling plate, an integrated design of the heat dissipation system is realized, providing strong support for the compact layout and efficient heat dissipation of the equipment.

[0004] However, the traditional method uses bolts and structural beams to fix other electrical components. The connection method between the stud bracket and the beam may affect the strength of the overall structure. The stud may become loose or broken when subjected to external forces.

[0005] Since the structural beam itself has a certain weight and volume, after assembly, the weight of the entire product is increased, the material cost is increased, and it is not conducive to cost reduction and efficiency improvement. Summary of the invention

[0006] The purpose of the present invention is to provide a water-cooling plate with an integrally welded riveted stud bracket and a welding method thereof. The riveted bolt brazing technology is used to tightly connect the stud bracket and the water-cooling plate to form an integral structure. This connection method is lighter than the traditional mechanical connection, and at the same time ensures that the water-cooling plate can remain stable in various working environments, which can solve the problems in the prior art.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a water-cooled plate integrally welded with riveted stud brackets, comprising a water-cooled plate body, wherein the water-cooled plate body comprises a first plate and a second plate, the first plate is bonded to the second plate, wherein the first plate and the second plate are both provided with pressing edges around them, and air expansion grooves are both provided on both sides of the first plate, a plurality of assembly plates are provided on the outer surface of the first plate, the assembly plates include riveted studs and welding plates, and a water inlet pipe and a water outlet pipe are provided at one end of the surface of the second plate.

[0008] Furthermore, a diversion cavity is provided inside the first plate and the second plate, wherein a water inlet guide cavity is provided on one side of the diversion cavity, and a water outlet guide cavity is provided on the other side of the diversion cavity.

[0009] Furthermore, the water inlet diversion chamber is connected to the water inlet pipe through the water inlet, the water outlet diversion chamber is connected to the water outlet pipe through the water outlet, and a flow channel pad shaft is arranged between the diversion chamber, the water inlet diversion chamber and the water outlet diversion chamber, and the flow channel pad shaft is connected to the first plate and the second plate through a slot.

[0010] Furthermore, a main partition is provided inside the diversion cavity, and three segmented partitions are provided on both sides of the main partition respectively. Three water inlet diversion holes are provided on one side of the flow channel pad shaft, and three water outlet diversion holes are provided on the other side of the flow channel pad shaft.

[0011] Furthermore, the water inlet diversion hole passes through the water inlet guide cavity and the diversion cavity, and the water outlet diversion hole passes through the water outlet guide cavity and the diversion cavity, wherein the water inlet diversion hole and the water outlet diversion hole are both arranged between the air expansion slot and the segmented partition.

[0012] Furthermore, a choke valve is arranged inside the two water outlet diversion holes on one side of the water outlet, and the choke valve is connected to the water outlet diversion hole through a slot, wherein a convection chamber is arranged inside the choke valve, a rocker arm valve plate is arranged inside the convection chamber, and the rocker arm valve plate is rotatably connected to the choke valve.

[0013] Furthermore, a horizontal partition is provided at one end of the rocker valve plate, and the horizontal partition is located in the diversion cavity. A conical partition is provided at the other end of the rocker valve plate, and the conical partition is located in the water outlet diversion cavity, wherein a resistance partition spring is provided on one side of the horizontal partition and the conical partition.

[0014] A method for welding a water-cooling plate integrally welded with a pressure riveted stud bracket comprises the following steps:

[0015] Step 1: Warm-up phase:

[0016] Before brazing, the water-cooled plate body needs to be preheated at a temperature of 500°C for 10 minutes. The purpose of preheating is to remove moisture and oil from the surface of the water-cooled plate and reduce defects such as pores and cracks during brazing.

[0017] Brazing material selection: select appropriate brazing material according to the materials of water cooling plate and riveting studs;

[0018] Step 2: Insulation stage:

[0019] After preheating, the brazing temperature is raised to the insulation temperature, which is 650°C for 30 minutes. During the insulation stage, the brazing material will fully melt and fill the gap between the rivet stud and the water-cooled plate to form a good welding joint.

[0020] Step 3: Shielding gas flow rate:

[0021] During the brazing process, nitrogen is introduced into the brazing furnace as a protective gas, and the flow rate of nitrogen is 0.5m 3 / min, the input pressure of nitrogen is 0.5 MPa. The function of the protective gas is to prevent the water-cooled plate and the rivet stud from contacting with oxygen during the brazing process, causing oxidation reaction and affecting the welding quality;

[0022] Step 4: Control the brazing gap between the rivet stud and the water-cooled plate body. The gap should be controlled at 0.15mm. If the gap is too large, the brazing material will be insufficient and affect the welding strength. If the gap is too small, it will be difficult for the brazing material to flow into the gap, causing welding defects. After brazing, use air cooling to cool the plate and avoid water cooling to avoid thermal stress, which may cause deformation or cracking of the water-cooled plate.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention uses the pressure riveting bolt brazing technology to tightly connect the stud bracket and the water-cooling plate to form an integral structure. This connection method is lighter than the traditional mechanical connection, and at the same time ensures that the water-cooling plate can remain stable in various working environments, reducing material costs and being more economical and practical, and improving the stability and service life of the product;

[0025] 2. In the present invention, the diversion cavity in the middle has the largest area, and a main partition and a segmented partition are arranged inside the diversion cavity. The main partition is responsible for dividing the diversion cavity into two interconnected cavity structures, and the two cavity structures correspond to the water inlet guide cavity and the water outlet guide cavity respectively, and the three segmented partitions correspond to the diversion holes between the three groups of cavities respectively. When the cooling water enters the diversion cavity through the diversion holes, it will first contact the segmented partition, and the segmented partition is used to change the flow direction of the liquid, thereby playing a role of buffering and anti-backflow, so that the flow speed of the liquid inside the diversion cavity can be reduced;

[0026] 3. In the present invention, the choke valve is installed in the two water outlet diversion holes on one side close to the water outlet. The choke valve can extend the flow path length of the cooling water in the diversion chamber, so that the cooling water can only flow into the water outlet diversion chamber from the water outlet diversion hole at the end, thereby avoiding the cooling water being discharged from the two water outlet diversion holes just after entering the diversion chamber, resulting in a decrease in water cooling efficiency. As the water temperature continues to rise, the viscosity and viscous resistance of the cooling water will decrease. At this time, the liquid flow rate inside the plate will increase. At this time, a single water outlet diversion hole cannot meet the circulation speed of the cooling water. Under the influence of the liquid flow rate, the conical partition at one end of the rocker arm valve plate will be pushed open. At this time, the liquid in the diversion chamber can directly enter the water outlet diversion chamber through the choke valve, thereby improving the cooling circulation efficiency of the plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the overall front view of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall bottom structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0030] Figure 4 It is a schematic diagram of the flow channel cushion shaft structure of the present invention;

[0031] Figure 5 for Figure 3 A schematic diagram of the enlarged structure at point A;

[0032] Figure 6 It is a schematic diagram of the assembly panel structure of the present invention.

[0033] In the figure: 1. water cooling plate body; 2. water inlet pipe; 3. water outlet pipe; 4. assembly plate; 5. choke; 101. first plate; 102. second plate; 103. pressing edge; 104. air expansion slot; 105. water inlet guide chamber; 106. diversion chamber; 107. water outlet guide chamber; 108. flow channel cushion shaft; 1061. segmented partition; 1062. main partition; 1081. water inlet diversion hole; 1082. water outlet diversion hole; 201. water inlet; 301. water outlet; 401. riveted stud; 402. welding plate; 501. rocker valve plate; 502. convection chamber; 503. resistance partition spring; 5011. horizontal partition; 5012. cone partition. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to solve the problem that the connection method between the stud bracket and the beam may affect the strength of the overall structure, the stud may become loose or break when subjected to external forces; please refer to Figure 1-6 , this embodiment provides the following technical solutions:

[0036] Embodiment 1:

[0037] A water-cooled plate integrally welded with a pressure riveted stud bracket comprises a water-cooled plate body 1, the water-cooled plate body 1 comprises a first plate 101 and a second plate 102, the first plate 101 and the second plate 102 are fitted together, wherein the first plate 101 and the second plate 102 are both provided with a pressing edge 103 around them, the first plate 101 and the second plate 102 are both provided with an air expansion groove 104 on both sides, a plurality of assembly plates 4 are provided on the outer surface of the first plate 101, the assembly plates 4 comprise pressure riveted studs 401 and a welding plate 402, and a water inlet pipe 2 and a water outlet pipe 3 are provided at one end of the surface of the second plate 102;

[0038] The water-cooled plate body 1 needs to be preheated before brazing. After the preheating is completed, the brazing temperature is raised to the insulation temperature. During the brazing process, nitrogen is input into the brazing furnace as a protective gas, and the brazing gap between the pressure riveting stud 401 and the water-cooled plate body 1 is controlled. The pressure riveting bolt brazing technology can tightly connect the stud bracket and the water-cooled plate to form an integral structure. This connection method is lighter than the traditional mechanical connection, and at the same time ensures that the water-cooled plate can remain stable in various working environments, reducing material costs is more economical and affordable, and improving the stability and service life of the product;

[0039] Embodiment 2:

[0040] See also Figure 2-3 , a diverter cavity 106 is provided inside the first plate 101 and the second plate 102, wherein a water inlet guide cavity 105 is provided on one side of the diverter cavity 106, and a water outlet guide cavity 107 is provided on the other side of the diverter cavity 106, the water inlet guide cavity 105 is connected to the water inlet pipe 2 through the water inlet 201, and the water outlet guide cavity 107 is connected to the water outlet pipe 3 through the water outlet 301, and a flow channel cushion shaft 108 is provided between the diverter cavity 106, the water inlet guide cavity 105 and the water outlet guide cavity 107, and the flow channel cushion shaft 108 is connected to the first plate 101 and the second plate 102 through a card slot;

[0041] The three cavities inside the water-cooled plate are separated by the flow channel cushion shaft 108, thereby forming a diverter cavity 106, a water inlet guide cavity 105 and a water outlet guide cavity 107. The cooling water enters the water inlet guide cavity 105 through the water inlet pipe 2, and then enters the diverter cavity 106, and finally enters the water outlet guide cavity 107 from the diverter cavity 106, and then is discharged through the water outlet guide cavity 107 for circulation. The cooling water completes the heat exchange operation during the flow inside the cavity, thereby realizing the cooling operation of the battery;

[0042] Embodiment 3:

[0043] In order to solve the problem that if the cooling water flows too fast in the cavity, the cooling water cannot fully exchange heat with the battery, thereby affecting the cooling efficiency of the battery, this embodiment provides the following technical solutions:

[0044] See also Figure 2-4 A main partition 1062 is provided inside the diversion chamber 106, and three segmented partitions 1061 are provided on both sides of the main partition 1062, three water inlet shunt holes 1081 are provided on one side of the flow channel cushion shaft 108, and three water outlet shunt holes 1082 are provided on the other side of the flow channel cushion shaft 108. The water inlet shunt hole 1081 passes through the water inlet guide chamber 105 and the diversion chamber 106, and the water outlet shunt hole 1082 passes through the water outlet guide chamber 107 and the diversion chamber 106, wherein the water inlet shunt hole 1081 and the water outlet shunt hole 1082 are both provided between the air expansion slot 104 and the segmented partition 1061;

[0045] The diverter chamber 106 located in the middle has the largest area. A main partition 1062 and a segmented partition 1061 are provided inside the diverter chamber 106. The main partition 1062 is responsible for dividing the diverter chamber 106 into two interconnected cavity structures, and the two cavity structures correspond to the water inlet guide chamber 105 and the water outlet guide chamber 107, respectively. The three segmented partitions 1061 correspond to the diverter holes between the three groups of cavities, respectively. When the cooling water enters the diverter chamber 106 through the diverter holes, it will first contact the segmented partition 1061. The segmented partition 1061 is used to change the flow direction of the liquid, thereby playing a role of buffering and preventing backflow, so that the flow speed of the liquid inside the diverter chamber 106 can be reduced;

[0046] The flow gap between the water inlet diversion hole 1081 and the water outlet diversion hole 1082 and the water inlet guide cavity 105 and the water outlet guide cavity 107 is shortened by designing the air expansion groove 104, which can also reduce the flow rate of the liquid in the guide cavity and prevent the liquid in the diversion cavity 106 from flowing back. The air expansion groove 104 can also increase the contact area between the plate and the external air, help the plate to dissipate heat, and improve the cooling efficiency;

[0047] Embodiment 4:

[0048] In order to solve the problem that the cooling water flows out from the diversion cavity 106 when the heat exchange with the battery is not completely completed, the present embodiment provides the following technical solutions:

[0049] See also Figure 3 and Figure 5, a choke valve 5 is arranged inside the two water outlet shunt holes 1082 on one side of the water outlet 301, and the choke valve 5 is connected to the water outlet shunt hole 1082 through a slot, wherein a convection chamber 502 is arranged inside the choke valve 5, and a rocker valve plate 501 is arranged inside the convection chamber 502, and the rocker valve plate 501 is rotatably connected to the choke valve 5, and a horizontal partition 5011 is arranged at one end of the rocker valve plate 501, and the horizontal partition 5011 is located in the diversion chamber 106, and a cone partition 5012 is arranged at the other end of the rocker valve plate 501, and the cone partition 5012 is located in the water outlet diversion chamber 107, wherein a resistance spring 503 is arranged on one side of the horizontal partition 5011 and the cone partition 5012;

[0050] The choke valve 5 is installed in the two water outlet shunt holes 1082 near the water outlet 301. The choke valve 5 can extend the path length of the cooling water in the shunt chamber 106, so that the cooling water can only flow into the water outlet guide chamber 107 from the water outlet shunt hole 1082 at the end, thereby preventing the cooling water from being discharged from the two water outlet shunt holes 1082 just after entering the shunt chamber 106, resulting in a decrease in water cooling efficiency.

[0051] As the water temperature continues to rise, the viscosity and viscous resistance of the cooling water will decrease, and the liquid flow rate inside the plate will increase. At this time, the single water outlet diversion hole 1082 cannot meet the circulation speed of the cooling water. Under the influence of the liquid flow rate, the conical partition 5012 at one end of the rocker valve plate 501 will be pushed open. At this time, the liquid in the diversion chamber 106 can directly enter the water outlet guide chamber 107 through the blocking valve 5, thereby improving the cooling circulation efficiency of the plate.

[0052] Working principle: the water-cooled plate body 1 needs to be preheated before brazing. After preheating, the brazing temperature is increased to the insulation temperature. During the brazing process, nitrogen is input into the brazing furnace as a protective gas to control the brazing gap between the rivet stud 401 and the water-cooled plate body 1, and finally air cooling is used for cooling.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A water-cooling plate integrally welded with a pressure riveted stud bracket, characterized in that: The invention comprises a water-cooling plate body (1), wherein the water-cooling plate body (1) comprises a first plate (101) and a second plate (102), wherein the first plate (101) and the second plate (102) are bonded together, wherein the first plate (101) and the second plate (102) are provided with pressing edges (103) on all sides, and the first plate (101) and the second plate (102) are provided with air expansion grooves (104) on both sides, and the outer surface of the first plate (101) is provided with a plurality of assembly plates (4), wherein the assembly plates (4) comprise rivet studs (401) and welding plates (402), and one end of the surface of the second plate (102) is provided with a water inlet pipe (2) and a water outlet pipe (3).

2. The water-cooling plate integrally welded with a pressure-riveted stud bracket according to claim 1, characterized in that: A diversion cavity (106) is provided inside the first plate (101) and the second plate (102), wherein a water inlet guide cavity (105) is provided on one side of the diversion cavity (106), and a water outlet guide cavity (107) is provided on the other side of the diversion cavity (106).

3. The water-cooling plate integrally welded with a pressure-riveted stud bracket according to claim 2, characterized in that: The water inlet guide chamber (105) is connected to the water inlet pipe (2) via a water inlet (201), and the water outlet guide chamber (107) is connected to the water outlet pipe (3) via a water outlet (301). A flow channel cushion shaft (108) is provided between the diversion chamber (106), the water inlet guide chamber (105), and the water outlet guide chamber (107), and the flow channel cushion shaft (108) is connected to the first plate member (101) and the second plate member (102) via a slot.

4. The water-cooling plate integrally welded with a pressure-riveted stud bracket according to claim 3, characterized in that: A main partition (1062) is arranged inside the diversion chamber (106), and three segmented partitions (1061) are arranged on both sides of the main partition (1062), three water inlet diversion holes (1081) are arranged on one side of the flow channel cushion shaft (108), and three water outlet diversion holes (1082) are arranged on the other side of the flow channel cushion shaft (108).

5. The water-cooling plate integrally welded with a pressure-riveted stud bracket according to claim 4, characterized in that: The water inlet diversion hole (1081) passes through the water inlet guide cavity (105) and the diversion cavity (106), and the water outlet diversion hole (1082) passes through the water outlet guide cavity (107) and the diversion cavity (106), wherein the water inlet diversion hole (1081) and the water outlet diversion hole (1082) are both arranged between the air expansion slot (104) and the segmented partition (1061).

6. The water-cooling plate integrally welded with a pressure-riveted stud bracket according to claim 5, characterized in that: A choke valve (5) is arranged inside the two water outlet shunt holes (1082) on one side of the water outlet (301), and the choke valve (5) is connected to the water outlet shunt hole (1082) via a slot, wherein a convection chamber (502) is arranged inside the choke valve (5), and a rocker arm valve plate (501) is arranged inside the convection chamber (502), and the rocker arm valve plate (501) is rotatably connected to the choke valve (5).

7. The water-cooling plate integrally welded with a pressure-riveted stud bracket according to claim 6, characterized in that: A horizontal partition (5011) is provided at one end of the rocker valve plate (501), and the horizontal partition (5011) is located in the diversion chamber (106). A conical partition (5012) is provided at the other end of the rocker valve plate (501), and the conical partition (5012) is located in the water outlet diversion chamber (107), wherein a resistance partition spring (503) is provided on one side of each of the horizontal partition (5011) and the conical partition (5012).

8. A method for welding a water-cooling plate with a pressure-riveted stud bracket integrally welded, based on the water-cooling plate with a pressure-riveted stud bracket integrally welded according to claim 1, characterized in that: The steps include: Step 1: Warm-up phase: Before brazing, the water-cooled plate body (1) needs to be preheated at a temperature of 450°C-500°C for 10-12 minutes. Step 2: Insulation stage: After preheating, the brazing temperature is raised to the holding temperature, the holding temperature is 600℃-650℃, and the holding time is 30-40min; Step 3: Shielding gas flow rate: During the brazing process, nitrogen is introduced into the brazing furnace as a protective gas, and the flow rate of nitrogen is 0.5m 3 / min, the input pressure of nitrogen is 0.2-0.5mpa; Step 4: Control the brazing gap between the pressure riveting stud (401) and the water cooling plate body (1), and the gap is controlled to be 0.05-0.15mm. After the brazing is completed, cool it by air cooling.

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