Liquid cooling plate laser cutting anti-pollution tool and cutting method thereof

Abstract

The invention discloses a liquid cooling plate laser cutting anti-pollution tool and a cutting method thereof, and belongs to the field of new energy battery manufacturing. The tool comprises a base, a cover plate and a second positioning piece. The base comprises a bottom plate and first positioning pieces, and the first positioning pieces are arranged at the corners of the bottom plate and used for positioning a liquid cooling plate to be cut to the top of the bottom plate; the cover plate covers the spraying surface of the liquid cooling plate to be cut, and the cover plate completely covers the spraying surface of the liquid cooling plate to be cut; the second positioning piece is arranged on the edge of the bottom plate and used for positioning the cover plate to the top of the spraying face of the liquid cooling plate to be cut. The tool fixes the liquid cooling plate through the positioning pins, the cover plate shields the spraying face, and the exposed edge is cut through laser. The problem of aluminum skimming pollution caused by cutting after spraying is solved, the integrity of an insulating layer is guaranteed, and the contour precision of the cold plate is smaller than or equal to 0.3 mm.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy battery manufacturing, and in particular to a liquid cooling plate laser cutting anti-pollution tool and a cutting method thereof. Background Art

[0002] New energy vehicle batteries require cooling, and liquid cooling plates are a core component of battery thermal management. The insulating coating on these plates is crucial, preventing high-voltage short circuits and the risk of thermal runaway. It acts as a protective shield, protecting the plates from corrosion and ensuring long-term reliable operation. It also bridges the gap between effective heat transfer and maintaining optimal battery operating temperature. It is a key factor in reducing system failure rates, maintenance costs, and extending service life.

[0003] Therefore, new energy vehicle battery liquid cooling plates require an insulating coating to meet safety, thermal conductivity, and corrosion resistance requirements. Furthermore, the insulating plate also needs to be welded to the housing. Currently, there are various methods for connecting new energy vehicle liquid cooling plates to the housing. Among them, friction stir welding, with its exceptional sealing, low deformation, high strength, and environmental friendliness, has become a core technology in the manufacture of new energy battery liquid cooling systems.

[0004] The friction stir welding process requires a clearance of ≤0.5mm between the cold plate and the housing to ensure a seamless weld after stir welding. Therefore, the cold plate's contour straightness must be ≤0.3mm. Currently, to ensure this ≤0.3mm contour straightness, a laser cutting followed by spray coating process is employed. Laser cutting ensures the plate's contour straightness, and before spraying, rubber plugs are placed around the edges of the cold plate to protect the cut edges.

[0005] The process of laser cutting followed by spraying has the problem that there are no holes on the front of the liquid cooling plate, making it impossible to hang and spray, and the masking plug cannot completely block the spray powder (edge ​​adsorption ≥ 0.3mm), affecting the subsequent welding seal with the box. Summary of the Invention

[0006] The present invention provides a liquid cooling plate laser cutting anti-pollution tool and a cutting method thereof, which can solve the problem in the prior art of the process of laser cutting first and then spraying that the liquid cooling plate cannot be suspended for spraying, and the problem that the contamination of the spraying powder affects the subsequent welding sealing.

[0007] To achieve the above objectives, the technical solutions adopted by the present invention are as follows:

[0008] A liquid cooling plate laser cutting anti-pollution tool, comprising:

[0009] A base, the base comprising a bottom plate and a first positioning member, the first positioning member being arranged at a corner of the bottom plate and used for positioning the liquid-cooling plate to be cut on top of the bottom plate;

[0010] A cover plate, the cover plate being placed on the sprayed surface of the liquid-cooled plate to be cut, the cover plate completely covering the sprayed surface of the liquid-cooled plate to be cut;

[0011] A second positioning member is provided at the edge of the bottom plate and is used to position the cover plate on the top of the sprayed surface of the liquid-cooling plate to be cut.

[0012] As a further solution of the present invention: one first positioning member is respectively provided at each of the four corners of the bottom plate, and the four first positioning members respectively cooperate with the process positioning holes at the four corners of the liquid cooling plate to be cut.

[0013] As a further solution of the present invention: the first positioning member includes a positioning block and a positioning pin, the positioning block is fixedly set at the corner of the base plate, the positioning pin is vertically fixed at the top of the positioning block, and the positioning pin matches the corresponding process positioning hole of the corner of the liquid cooling plate to be cut.

[0014] As a further solution of the present invention, a second positioning member is respectively provided on a long edge and a short edge of the bottom plate.

[0015] As a further solution of the present invention: the second positioning member includes:

[0016] A right-angle positioning plate, one end of which is fixedly arranged on a corresponding edge of the bottom plate;

[0017] A sleeve, the sleeve being fixedly arranged on a side surface of the right-angle positioning plate;

[0018] A positioning head is movably inserted into the sleeve and passes through the right-angle positioning plate to push the cover plate to move.

[0019] As a further solution of the present invention: the positioning head includes:

[0020] a spring, one end of which is fixedly disposed in the sleeve and the other end of which extends outside the sleeve;

[0021] A positioning push rod, the rod body of the positioning push rod passes through the spring, the sleeve and the right-angle positioning plate, and the end of the rod body of the positioning push rod is perpendicular to the side of the cover plate.

[0022] As a further solution of the present invention: a protective cotton layer is provided on the bottom surface of the cover plate, and handles are hinged on both sides of the top surface of the cover plate.

[0023] As a further solution of the present invention: a flow channel profiling groove is provided on the top surface of the bottom plate, and the contour of the flow channel profiling groove matches the flow channel at the bottom of the liquid cooling plate to be cut.

[0024] As a further solution of the present invention, the present invention also proposes a liquid cooling plate laser cutting method, which is applied to the liquid cooling plate laser cutting anti-pollution tooling, comprising the following steps:

[0025] S1. Place the liquid cooling plate to be cut, which has been sprayed with an insulation layer, on the base. Insert the positioning pins at the four corners of the base into the process positioning holes at the four corners of the liquid cooling plate to be cut, and fix the liquid cooling plate to be cut on the top of the base.

[0026] S2. Snap the cover plate onto the top surface of the liquid-cooled plate to be cut, and push the two positioning push rods in sequence until they are in their limits. At this point, the cover plate completely covers the sprayed surface on the top of the liquid-cooled plate to be cut.

[0027] S3. After positioning the liquid cooling plate to be cut, release the two positioning push rods. The two positioning push rods return to their original positions under the action of the corresponding springs, so that the positioning push rods do not affect the subsequent cutting process.

[0028] S4. The laser beam cuts the exposed edge of the positioned liquid cooling plate from top to bottom.

[0029] As a further solution of the present invention: the laser cutting power is 2000-3000W, and the cutting speed is 10-15mm / s.

[0030] Beneficial effects of the present invention:

[0031] The present invention first sprays an insulating layer on the liquid cooling plate to form a sprayed surface, and then fixes the liquid cooling plate on the base plate through the process positioning holes at the four corners of the liquid cooling plate and the positioning pins of the first positioning piece on the base plate. Then, the cover plate is buckled, and the two positioning push rods of the second positioning piece on the base plate are pushed to make the cover plate completely cover the sprayed surface on the top of the liquid cooling plate to be cut. The sprayed surface is shielded by the cover plate, and then the exposed edge of the liquid cooling plate is laser cut to avoid aluminum chips generated during the cutting process from splashing into the sprayed surface of the liquid cooling plate and causing pollution. This solves the problem of aluminum chip pollution caused by spraying first and then cutting, and ensures the integrity of the sprayed surface and the contour accuracy of the liquid cooling plate ≤0.3mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of an explosion-proof tooling structure for laser cutting of a liquid cooling plate according to the present invention;

[0034] Figure 2 Schematic diagram of the bottom plate structure of the present invention;

[0035] Figure 3 yes Figure 2 A schematic diagram of the structure at center A;

[0036] Figure 4 yes Figure 2 A magnified schematic diagram of the structure at point B in the middle;

[0037] Figure 5 This is a schematic top view of an anti-pollution tooling structure for laser cutting of a liquid cooling plate according to the present invention;

[0038] Figure 6 It is a schematic flow chart of a liquid cooling plate laser cutting method of the present invention.

[0039] In the figure: 1. Base plate; 101. Flow channel profiling groove; 2. First positioning member; 201. Positioning block; 202. Positioning pin; 3. Cover plate; 301. Protective cotton layer; 302. Handle; 4. Second positioning member; 401. Right-angle positioning plate; 402. Sleeve; 403. Spring; 404. Positioning push rod; 5. Liquid cooling plate to be cut; 501. Process positioning hole. DETAILED DESCRIPTION

[0040] The following is a clear and complete description of 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 them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, and a specific direction structure and operation. Therefore, they cannot be understood as limiting the present invention.

[0042] In addition, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] See also Figure 1-5 As shown, an embodiment of the present invention provides a liquid cooling plate laser cutting anti-pollution tooling, including a base, a cover plate 3, a first positioning member 2 and a second positioning member 4.

[0044] See also Figure 1As shown, the base comprises a base plate 1 and first positioning members 2. Base plate 1 is made of 6061 aluminum alloy and has an anodized surface. The surface of base plate 1 must be free of scratches, abrasions, burrs, or other defects. First positioning members 2 are positioned at the corners of base plate 1. In this embodiment, a first positioning member 2 is positioned at each of the four corners of base plate 1. These four first positioning members 2 engage with process positioning holes 501 at the four corners of the liquid cooling plate 5 to be cut, positioning the liquid cooling plate 5 to be cut on top of base plate 1.

[0045] Specifically, see Figure 4 As shown, in this embodiment, the first positioning member 2 includes a positioning block 201 and a positioning pin 202. The positioning block 201 is integrally formed with the corner of the base plate 1. The positioning block 201 has a horizontal top surface. The positioning pin 202 is vertically fixed on the top of the positioning block 201. The lower end of the positioning pin 202 is embedded in the positioning block 201 and welded and fixed. There is a distance between the positioning pin 202 and the base plate 1. It should be noted that the positioning pin 202 matches the corresponding process positioning hole 501 of the corner of the liquid cooling plate 5 to be cut. The diameter of the positioning pin 202 forms an H7 / g6 tolerance fit with the process positioning hole 501 of the liquid cooling plate, ensuring that the displacement deviation of the liquid cooling plate in the X / Y plane is ≤0.1mm, meeting the requirement that the contour of the liquid cooling plate is ≤0.3mm.

[0046] See also Figure 5 As shown, during cutting, the cover plate 3 is placed over the sprayed surface of the liquid-cooling plate 5 to be cut. The cover plate 3 must completely cover the sprayed surface of the liquid-cooling plate 5 to prevent aluminum chips from contaminating the sprayed surface during laser cutting. In other words, the vertical projection of the cover plate 3 in the closed state completely covers the sprayed surface of the liquid-cooling plate, and the length and width of the cover plate 3 are respectively 1-5 mm larger than the sprayed surface of the liquid-cooling plate to prevent aluminum chips from splashing into the sprayed surface from the edge of the cover plate 3.

[0047] See also Figure 1 As shown, in this embodiment, a protective cotton layer 301 is provided on the bottom surface of the cover plate 3. When the cover plate 3 is closed, the protective cotton layer 301 is in close contact with the sprayed surface of the liquid cooling plate. The protective cotton layer 301 is made of high-temperature resistant ceramic fiber cotton with a thickness of 1-2 mm and is fixed to the bottom surface of the cover plate 3 with a heat-resistant adhesive. It has a compression rebound rate of ≥90% and a Mohs hardness of ≤2, which prevents scratches on the sprayed surface of the liquid cooling plate. The protective cotton layer 301 fills the slight unevenness between the cover plate 3 and the sprayed surface of the liquid cooling plate, improving the sealing between the cover plate 3 and the sprayed surface of the liquid cooling plate, further reducing the risk of aluminum chips splashing in through the gap. At the same time, the protective cotton layer 301 can also absorb vibrations during subsequent laser cutting, preventing the cover plate 3 from shifting due to vibration.

[0048] Handles 302 are hinged on both sides of the top surface of the cover plate 3. The arrangement of the handles 302 facilitates the opening and closing of the cover plate 3. The arrangement of the handles 302 must not interfere with the operation of the first positioning member 2 and the second positioning member 4.

[0049] See also Figure 2 As shown, in this embodiment, a second positioning member 4 is provided on a long edge and a short edge of the base plate 1 respectively, and the second positioning member 4 is used to push the cover plate 3 to completely cover the top of the sprayed surface of the liquid cooling plate 5 to be cut.

[0050] See also Figure 3 As shown, in this embodiment, the second positioning member 4 includes a right-angle positioning plate 401, a sleeve 402, and a positioning head. One end of the flat plate of the right-angle positioning plate 401 is fixedly welded to the middle of the corresponding edge of the base plate 1. The vertical plate of the right-angle positioning plate 401 is perpendicular to the base plate 1, and the top surface of the vertical plate of the right-angle positioning plate 401 is higher than the top surface of the cover plate 3 after covering. A through hole parallel to the base plate 1 is provided on the vertical plate of the right-angle positioning plate 401. The sleeve 402 is fixedly installed on the outer side of the vertical plate of the right-angle positioning plate 401 through the screw holes on both wings, and the cavity inside the sleeve 402 is aligned with the through hole on the vertical plate of the right-angle positioning plate 401; the positioning head is movably inserted into the cavity inside the sleeve 402 and the through hole on the vertical plate. Under the action of external force, the positioning head can push the cover plate 3 to move.

[0051] In this embodiment, the positioning head includes a spring 403 and a positioning push rod 404. One end of the spring 403 is fixedly disposed in the cavity within the sleeve 402, while the other end of the spring 403 extends outside the sleeve 402. The rod body of the positioning push rod 404 passes through the spring 403, the sleeve 402, and the right-angle positioning plate 401. The end of the spring 403 away from the sleeve 402 is tightly fixed to the positioning push rod 404. The end of the positioning push rod 404 can be tightly attached to the side of the cover plate 3, so that when the positioning push rod 404 is pushed, the cover plate 3 can be moved.

[0052] It should be noted that the positioning push rods 404 can be replaced according to the size of the liquid cooling plate. Different-sized liquid cooling plates correspond to different-sized positioning push rods 404. In this way, by simply pushing both positioning push rods 404 simultaneously until they cannot move, the cover plate 3 is quickly and accurately positioned to completely cover the sprayed surface of the liquid cooling plate 5 to be cut.

[0053] It will be appreciated that in this embodiment, the top surface of the base plate 1 is provided with a flow channel profiling groove 101, the contour of which matches the flow channel at the bottom of the liquid cooling plate 5 to be cut. When the liquid cooling plate 5 to be cut is placed on the top surface of the base plate 1, the flow channel at the bottom of the liquid cooling plate 5 to be cut is engaged within the flow channel profiling groove 101, ensuring that there is no gap between the liquid cooling plate 5 to be cut and the top surface of the base plate 1, and ensuring stability during cutting.

[0054] See also Figure 5 and Figure 6 As shown, the embodiment of the present invention further proposes a cutting method for a liquid cooling plate using the above-mentioned liquid cooling plate laser cutting anti-pollution tooling, which specifically includes the following steps:

[0055] First, fix the base plate 1 on the cutting station.

[0056] Then, the liquid-cooling plate 5 to be cut, which has been sprayed with an insulating layer, is placed on the base. The flow channel at the bottom of the liquid-cooling plate 5 to be cut is clamped in the flow channel profiling groove 101 on the base, and the positioning pins 202 at the four corners of the base are inserted into the process positioning holes 501 at the four corners of the liquid-cooling plate 5 to be cut one by one, and the liquid-cooling plate 5 to be cut is positioned and fixed on the top of the base as required.

[0057] Then, the cover plate 3 is moved by the handle 302, and the cover plate 3 is buckled in the vertical direction on the top surface of the liquid-cooled plate 5 to be cut. Then, the two positioning push rods 404 are pushed in turn, the spring 403 is compressed, and the rod body of the positioning push rod 404 passes through the through hole of the right-angle positioning plate 401 and touches the side of the cover plate 3, thereby pushing the cover plate 3 to move until the two positioning push rods 404 are limited. At this time, the cover plate 3 completely covers the sprayed surface of the top surface of the liquid-cooled plate 5 to be cut.

[0058] After the liquid cooling plate 5 to be cut is positioned, the two positioning push rods 404 are released, and the two positioning push rods 404 return to their original positions under the action of the corresponding springs 403, so that the positioning push rods 404 do not affect the subsequent cutting process.

[0059] Then turn on the laser cutting equipment, and the laser beam cuts the exposed edge of the positioned liquid cooling plate from top to bottom. The laser cutting power is 2000-3000W, and the cutting speed is 10-15mm / s.

[0060] After the cutting is completed, the cover plate 3 is removed, the cut liquid cooling plate is taken out and the aluminum chips are removed, so that the liquid cooling plate with no aluminum chip contamination on the sprayed surface and a straightness of the contour around 0.3 mm or less can be obtained.

[0061] The above detailed description of the preferred embodiments of the present invention should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent of the present invention.

Claims

1. A liquid cooling plate laser cutting anti-pollution tooling, characterized in that: include: A base, the base comprising a bottom plate (1) and a first positioning member (2), the first positioning member (2) being arranged at a corner of the bottom plate (1) and being used for positioning the liquid cooling plate (5) to be cut on top of the bottom plate (1); A cover plate (3), the cover plate (3) being placed on the sprayed surface of the liquid-cooled plate (5) to be cut, the cover plate (3) completely covering the sprayed surface of the liquid-cooled plate (5) to be cut; A second positioning member (4) is provided at the edge of the base plate (1) and is used to position the cover plate (3) on the top of the sprayed surface of the liquid-cooled plate (5) to be cut.

2. The anti-pollution tool for laser cutting of liquid cooling plates according to claim 1, characterized in that: The four corners of the base plate (1) are respectively provided with a first positioning member (2), and the four first positioning members (2) respectively cooperate with the process positioning holes (501) at the four corners of the liquid cooling plate (5) to be cut.

3. The anti-pollution tool for laser cutting of liquid cooling plates according to claim 2, characterized in that: The first positioning member (2) includes a positioning block (201) and a positioning pin (202), wherein the positioning block (201) is fixedly arranged at the corner of the base plate (1), and the positioning pin (202) is vertically fixedly arranged at the top of the positioning block (201), and the positioning pin (202) matches the corresponding process positioning hole (501) at the corner of the liquid cooling plate (5) to be cut.

4. The anti-pollution tool for laser cutting of liquid cooling plates according to claim 1, characterized in that: A second positioning member (4) is respectively provided on a long edge and a short edge of the bottom plate (1).

5. The anti-pollution tool for laser cutting of liquid cooling plate according to claim 4, characterized in that: The second positioning member (4) comprises: a right-angle positioning plate (401), one end of which is fixedly arranged on a corresponding edge of the bottom plate (1); A sleeve (402), the sleeve (402) being fixedly arranged on a side surface of the right-angle positioning plate (401); A positioning head is movably inserted into the sleeve (402), and the positioning head passes through the right-angle positioning plate (401) and is used to push the cover plate (3) to move.

6. The anti-pollution tool for laser cutting of liquid cooling plate according to claim 5, characterized in that: The positioning head comprises: a spring (403), one end of the spring (403) being fixedly disposed in the sleeve (402) and the other end of the spring (403) extending outside the sleeve (402); A positioning push rod (404), wherein the rod body of the positioning push rod (404) passes through the spring (403), the sleeve (402) and the right-angle positioning plate (401), and the end of the rod body of the positioning push rod (404) is perpendicular to the side of the cover plate (3).

7. The anti-pollution tool for laser cutting of liquid cooling plates according to claim 1, characterized in that: The bottom surface of the cover plate (3) is provided with a protective cotton layer (301), and handles (302) are hingedly connected to both sides of the top surface of the cover plate (3).

8. The anti-pollution tool for laser cutting of liquid cooling plates according to claim 1, characterized in that: A flow channel profiling groove (101) is provided on the top surface of the bottom plate (1), and the contour of the flow channel profiling groove (101) matches the flow channel at the bottom of the liquid cooling plate (5) to be cut.

9. A liquid cooling plate laser cutting method, applied to a liquid cooling plate laser cutting anti-pollution tool as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Place the liquid cooling plate (5) to be cut, which has been sprayed with an insulating layer, on the base, insert the positioning pins (202) at the four corners of the base into the process positioning holes (501) at the four corners of the liquid cooling plate (5) to be cut, and position and fix the liquid cooling plate (5) to be cut on the top of the base; S2. Snap the cover plate (3) onto the top surface of the liquid cooling plate (5) to be cut, and push the two positioning push rods (404) in sequence until the two positioning push rods (404) are limited. At this time, the cover plate (3) completely covers the sprayed surface on the top of the liquid cooling plate (5) to be cut; S3. After the liquid cooling plate (5) to be cut is positioned, the two positioning push rods (404) are released, and the two positioning push rods (404) return to their original positions under the action of the corresponding springs (403), so that the positioning push rods (404) do not affect the subsequent cutting process; S4. The laser beam cuts the exposed edge of the positioned liquid cooling plate from top to bottom.

10. The liquid cooling plate laser cutting method according to claim 9, characterized in that: In step S4, the laser cutting power is 2000-3000W, and the cutting speed is 10-15mm / s.

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