Knife housing with explosion-proof valve and its welding fixture for high-frequency welding

Abstract

This utility model provides a knife shell with explosion-proof valve for high-frequency welding and its welding fixture. The knife shell with explosion-proof valve for high-frequency welding includes a shell that is long and plate-shaped with an internal cavity. The two ends of the shell along its length are openings communicating with the internal cavity. The two sides along the width of the shell form a bottom surface and a top surface. The top surface has an outwardly protruding boss with a through welding hole. It also includes a welding plate with a through clearance hole. The welding fixture includes a sleeve plate and a handle. The sleeve plate is flat, and its thickness matches the height of the shell's internal cavity. The handle is located at the end of the sleeve plate and protrudes from its side. The upper edge of the sleeve plate along its width has a recessed positioning groove. This knife shell with explosion-proof valve for high-frequency welding can improve the yield rate of finished products, and this welding fixture can quickly and stably weld the aforementioned knife shell.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and more specifically to a knife housing with an explosion-proof valve for high-frequency welding and its welding fixture. Background Technology

[0002] Existing high-frequency welded aluminum shells, due to the concentrated heat input to the material during high-frequency welding, generally have a thin wall thickness (typically 0.35mm) to avoid warping or strength reduction caused by welding. This makes them incompatible with conventional explosion-proof valves (0.5mm), resulting in most high-frequency welded knife shells on the market lacking explosion-proof valve design.

[0003] If an explosion-proof valve with a corresponding wall thickness (such as 0.35mm) is used, there is a higher risk of burn-through during high-frequency welding. Utility Model Content

[0004] The first objective of this invention is to address the aforementioned problems in the existing technology by providing a knife housing with an explosion-proof valve suitable for high-frequency welding operations.

[0005] The second objective of this invention is to provide the welding fixture used for the explosion-proof valve knife housing in high-frequency welding.

[0006] To achieve the first objective mentioned above, this utility model can be implemented through the following technical solutions:

[0007] A blade housing with an explosion-proof valve for high-frequency welding includes a shell that is long and plate-shaped with an internal cavity. The shell has openings at both ends along its length that communicate with its internal cavity, and bottom and top surfaces at the edges on both sides along its width. The top surface has an outwardly protruding boss with a through welding hole. The shell also includes a welding piece with a through clearance hole. The welding piece is fixed to the inside of the shell, and the clearance hole on the welding piece is directly opposite the welding hole. The size of the welding hole is larger than the size of the clearance hole, and a stepped placement portion is formed between the inner side of the welding piece and the boss. When the explosion-proof valve is installed in the welding hole, the side of the explosion-proof valve can abut against the placement portion.

[0008] In the aforementioned explosion-proof valve knife housing for high-frequency welding, the boss and the housing are an integral structure.

[0009] In the aforementioned explosion-proof valve knife housing for high-frequency welding, the inner side of the housing has a recess that faces the boss, and the welding piece matches the recess and is embedded in the recess.

[0010] In the aforementioned explosion-proof valve holder for high-frequency welding, the thickness of the welding sheet is smaller than the height of the notch.

[0011] In the aforementioned explosion-proof valve knife housing for high-frequency welding, the boss is located at the center of the top surface.

[0012] In the aforementioned explosion-proof valve knife housing for high-frequency welding, the upper port of the welding hole has an annular protruding reinforcing portion.

[0013] To achieve the second objective mentioned above, this utility model can be implemented through the following technical solutions:

[0014] A welding fixture, characterized in that it includes a sleeve plate and a handle, wherein the sleeve plate is flat and the thickness of the sleeve plate matches the height of the inner cavity of the housing, the handle is located at the end of the sleeve plate and protrudes from the side of the sleeve plate, and the upper edge of the sleeve plate in the width direction has a recessed positioning groove, wherein when the sleeve plate is embedded in the housing and the handle abuts against the port of the housing, the positioning groove is aligned with the recess on the housing.

[0015] In the welding fixture described above, the positioning groove is matched with the welding piece.

[0016] In the welding fixture described above, both sides of the handle protrude from the corresponding sides of the sleeve plate.

[0017] In the welding fixture described above, the sleeve and the handle are an integral structure.

[0018] In the aforementioned welding fixture, a flexible buffer sheet is fixedly connected to the handle. When the sleeve is embedded in the housing, the buffer sheet is located between the handle and the end of the housing.

[0019] Compared to existing technologies, the explosion-proof valve blade housing used for high-frequency welding can compensate for weld burn-through even if it occurs on the housing surface, thanks to the welding pads covering the welding holes and the welding position of the explosion-proof valve. This improves the yield rate of welding explosion-proof valves onto thin-walled housings. Furthermore, the recess on the inner side of the housing, directly opposite the boss, will not form a protrusion on the internal surface after accommodating the welding base, thus not affecting subsequent cell assembly.

[0020] This welding fixture can stably support the explosion-proof valve, effectively improving welding efficiency and operational accuracy, and has high practical value. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a knife housing with an explosion-proof valve used for high-frequency welding.

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the solder sheet.

[0023] Figure 3 yes Figure 1 A schematic diagram of the structure at part A in the middle.

[0024] Figure 4 This is a three-dimensional structural diagram showing the connection between the welding fixture and the shell.

[0025] Figure 5 This is a three-dimensional structural diagram of the welding fixture.

[0026] Figure 6 This is a cross-sectional structural diagram showing the connection between the welding fixture and the shell.

[0027] Figure 7 yes Figure 6 A schematic diagram of the structure at part B in the middle.

[0028] In the picture:

[0029] 1. Shell; 1a. Top surface; 1b. Bottom surface; 2. Boss; 2a. Welding hole; 3. Welding piece; 3a. Clearance hole; 4. Placement part; 5. Recess; 6. Reinforcing part; 7. Sleeve; 7a. Positioning groove; 8. Handle; 9. Buffer plate; 10. Explosion-proof valve. Detailed Implementation

[0030] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings.

[0031] like Figure 1-7 As shown, the explosion-proof valve cutter shell for high-frequency welding is applicable to aluminum shells with a wall thickness of 0.3-0.7mm and explosion-proof valves of the same thickness. The explosion-proof valve cutter shell for high-frequency welding includes a shell 1 that is long and plate-shaped with an internal cavity. The two ends of the shell 1 in the length direction are openings communicating with its internal cavity. The two sides of the shell 1 in the width direction are a bottom surface 1b and a top surface 1a. The top surface 1a has an outwardly protruding boss 2. The boss 2 has a through welding hole 2a. It also includes a welding piece 3. The welding piece 3 has a through clearance hole 3a. The welding piece 3 is fixed to the inside of the shell 1 and the clearance hole 3a on the welding piece 3 is directly opposite the welding hole 2a. The size of the welding hole 2a is larger than the size of the clearance hole 3a, and a stepped placement part 4 is formed between the inside of the welding piece 3 and the boss 2. When the explosion-proof valve 10 is installed in the welding hole 2a, the side of the explosion-proof valve 10 can abut against the placement part.

[0032] The explosion-proof valve knife housing for high-frequency welding has an innovative feature: a boss 2 is provided on the top surface of the housing 1, and a welding piece 3 is provided on the boss 2.

[0033] When the explosion-proof valve is installed at the welding hole 2a for high-frequency welding, the welding piece 3 can avoid the problem of penetration during the welding process. Therefore, it effectively ensures the yield of thin-walled shells during high-frequency welding.

[0034] Since the existing explosion-proof valve has a size of 0.35mm, the wall thickness of the housing 1 in this embodiment is also 0.35mm. Obviously, applying the above structure can effectively avoid the problem of penetration during high-frequency welding of the housing 1 with this thickness.

[0035] Since the placement part 4 can be connected to the explosion-proof valve 10, it can position the explosion-proof valve 10 and prevent the explosion-proof valve 10 from falling off the welding hole 2a during the assembly process.

[0036] The boss 2 and the shell 1 are an integral structure.

[0037] This appropriately improves the structural compactness of the entire shell 1.

[0038] The inner side of the housing 1 has a recess 5 that is directly opposite the boss 2, and the aforementioned welding piece 3 matches the recess 5 and is embedded in the recess 5.

[0039] The boss 2 and the recess 5 are directly opposite each other. Since the boss 2 is manufactured using a stamping process, the recess 5 is formed on the inner side of the shell at the same time as the boss 2 is formed.

[0040] The thickness of the welding piece 3 is less than the height of the notch 5.

[0041] This prevents the solder pad 3 from protruding from the inside of the housing 1 after installation, thus avoiding any obstruction between the solder pad 3 and the battery cell during subsequent battery cell installation.

[0042] The boss 2 is located in the middle of the top surface 1a.

[0043] The upper end of the welding hole 2a has an annular protruding reinforcing part 6.

[0044] The reinforcing part 6 effectively increases the area at the connection between the explosion-proof valve and the housing 1, facilitating subsequent welding operations of the explosion-proof valve 10. In this embodiment, the height from the top of the reinforcing part 6 to the outside of the housing 1 is 0.2 mm. Depending on the actual situation, a height of 0.3 mm or 0.5 mm from the top of the reinforcing part 6 to the outside of the housing 1 is also feasible.

[0045] This welding fixture includes a sleeve plate 7 and a handle 8. The sleeve plate 7 is flat and its thickness matches the height of the inner cavity of the housing 1. The handle 8 is located at the end of the sleeve plate 7 and protrudes from the side of the sleeve plate 7. The upper edge of the sleeve plate 7 in the width direction has a recessed positioning groove 7a. When the sleeve plate 7 is embedded in the housing 1 and the handle 8 abuts against the port of the housing 1, the positioning groove 7a is aligned with the recess 5 on the housing 1.

[0046] Since the sleeve 7 matches the housing 1 and the explosion-proof valve is pre-positioned in the positioning groove 7a, the explosion-proof valve 10 can be stably positioned at the welding hole 2a of the boss 2 after the sleeve 7 is embedded in the housing 1.

[0047] Since the positioning groove 7a on the sleeve plate 7 matches the welding piece 3, the sleeve plate 7 can be positioned in a suitable setting position during the assembly process after it is positioned and connected to the housing 1.

[0048] In other words, the welding piece 3 is placed directly into the positioning groove 7a. Then, the housing 1 is fitted onto the sleeve plate 7. At this time, one end face of the welding piece 3 just touches the inner end face of the boss 2, and the above-mentioned clearance hole 2a is just accommodated in the welding hole 2a. At this time, the explosion-proof valve 10 is placed into the welding hole 2a, and the welding operation can begin when the explosion-proof valve 10 comes into contact with the welding piece 3.

[0049] It can be seen that, since there are appropriate gaps between the sleeve plate 7 and the top surface 1a and bottom surface 1b of the housing 1, the sleeve plate 7 can move relative to the housing 1 under the action of external force, allowing the welding piece 3 at the positioning groove 7a to enter the welding position of the housing 1.

[0050] The positioning groove 7a is matched with the welding piece 3.

[0051] Both sides of the handle 8 protrude from the corresponding sides of the sleeve 7.

[0052] This structure allows the sleeve 7 to be subjected to force on both sides, improving its stress stability.

[0053] The sleeve 7 and the handle 8 are an integral structure.

[0054] A flexible buffer sheet 9 is fixedly connected to the handle 8. When the sleeve plate 7 is embedded in the housing 1, the buffer sheet 9 is located between the handle 8 and the end of the housing 1.

[0055] In this embodiment, the buffer sheet 9 is made of rubber. However, other flexible materials, such as silicone, can also be used depending on the specific circumstances.

[0056] Even if burn-through occurs on the surface of the explosion-proof valve blade housing used for high-frequency welding, it can be compensated for by the welding pads covering the welding holes and the welding position of the explosion-proof valve, thereby improving the yield rate of welding explosion-proof valves on thin-walled housings. At the same time, the recess on the inner side of the housing that is directly opposite the boss will not form a protrusion on the inner surface after accommodating the welding base, and will not affect the subsequent assembly of the battery cells.

[0057] This welding fixture can stably support the explosion-proof valve, effectively improving welding efficiency and operational accuracy, and has high practical value.

[0058] The above-described technical solution of this utility model addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The parts not covered in this application's technical solution are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0059] The technical solutions in the above embodiments have clearly and completely described the content of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A knife housing with an explosion-proof valve for high-frequency welding, comprising a shell in the shape of a long plate with an internal cavity, characterized in that, The two ends of the shell along its length are openings communicating with its inner cavity. The edges on both sides of the shell along its width are the bottom and top surfaces. The top surface has an outwardly protruding boss with a through welding hole. It also includes a welding piece with a through clearance hole. The welding piece is fixed to the inside of the shell and the clearance hole on the welding piece is directly opposite the welding hole. The size of the welding hole is larger than the size of the clearance hole, and a stepped placement part is formed between the inner side of the welding piece and the boss. When the explosion-proof valve is installed in the welding hole, the side of the explosion-proof valve can abut against the placement part.

2. The explosion-proof valve-equipped knife housing for high-frequency welding according to claim 1, characterized in that, The boss and the shell are an integral structure.

3. The explosion-proof valve-equipped knife housing for high-frequency welding according to claim 1, characterized in that, The inner side of the housing has a recess that is directly opposite the boss, and the aforementioned welding piece matches the recess and is embedded in the recess.

4. The explosion-proof valve-equipped knife housing for high-frequency welding according to claim 3, characterized in that, The thickness of the weld sheet is less than the height of the notch.

5. The explosion-proof valve-equipped knife housing for high-frequency welding according to claim 1, characterized in that, The boss is located in the middle of the top surface.

6. The explosion-proof valve-equipped knife housing for high-frequency welding according to claim 1, characterized in that, The upper end of the welding hole has an annular protruding reinforcing part.

7. A welding fixture for high-frequency welding of a valve blade with explosion-proof casing, used for high-frequency welding of a valve blade with explosion-proof casing as described in any one of claims 1-6, the welding fixture comprising a sleeve plate and a handle, the sleeve plate being flat and the thickness of the sleeve plate matching the height of the inner cavity of the casing, the handle being located at the end of the sleeve plate and protruding from the side of the sleeve plate, the upper edge of the sleeve plate having a recessed positioning groove in the width direction, wherein when the sleeve plate is embedded in the casing and the handle abuts against the port of the casing, the positioning groove is aligned with a recess on the casing.

8. The welding fixture according to claim 7, characterized in that, The positioning groove is matched with the welding sheet.

9. The welding fixture according to claim 7, characterized in that, Both sides of the handle protrude from the corresponding sides of the sleeve plate.

10. The welding fixture according to claim 7, characterized in that, A flexible buffer sheet is fixed to the handle. When the sleeve is inserted into the housing, the buffer sheet is located between the handle and the end of the housing.

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