Method for integrally forming a top cover sheet with a safety valve
Patent Information
- Application Number
- CN202610854200.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-12
- Publication Date
- 2026-09-15
Smart Images
Figure CN122746342A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of top cover plates, and more specifically, to a method for integrally molding a top cover plate and a safety valve. Background Technology
[0002] The top cover plate, as the main structure of the battery cover, seals the top opening of the battery casing. The safety valve is installed on the top cover plate. When the internal air pressure of the battery rises to a set threshold, the explosion-proof structure of the safety valve breaks to release pressure, thus playing an overpressure protection role. Therefore, the top cover plate and the safety valve need to be used together to achieve the sealing and explosion-proof functions of the battery cover.
[0003] In the existing technology, the top cover plate and the safety valve are usually processed and formed as two independent parts. After processing, the safety valve is assembled onto the top cover plate by welding or riveting.
[0004] In this split-forming processing method, the top cover and the safety valve each require independent stamping processes to complete their forming. Furthermore, they require additional assembly processes to connect them together, which increases the overall processing steps and results in lower processing efficiency for both the top cover and the safety valve. Summary of the Invention
[0005] The purpose of this invention is to provide a method for integrally molding the top cover and the safety valve, which aims to solve the problem of low processing efficiency caused by the separate molding of the top cover and the safety valve in the prior art.
[0006] This invention is achieved through a method for integrally molding the top cover and the safety valve, comprising the following processing steps: 1) Provide an aluminum panel, and cut the outer periphery of the panel to make the outer periphery of the panel flat to form a top cover sheet; stamp the top cover sheet to form pole holes and liquid injection holes arranged vertically through the top cover sheet; 2) Stamp the top cover sheet to stretch it upwards, forming an upwardly protruding forward stretching plate on the top cover sheet. The thickness of the forward stretching plate is less than the thickness of the panel. A forward stretching ring is formed on the outer periphery of the forward stretching plate, and the forward stretching ring is arranged around the outer periphery of the forward stretching plate. 3) Stamp the forward stretching plate to stretch the forward stretching plate downwards in the opposite direction, forming a reverse stretching plate on the forward stretching plate, the thickness of the reverse stretching plate being less than the thickness of the forward stretching plate; The outer periphery of the reverse tension plate forms a reverse tension ring, the inner sidewall of the reverse tension ring is abutted against the outer periphery of the safety valve, and the outer side of the reverse tension ring is abutted against the forward tension ring. 4) Stamp the top of the reverse stretching plate to form an upper recessed groove on the top of the reverse stretching plate; stamp the bottom of the reverse stretching plate to form a lower recessed groove on the bottom of the reverse stretching plate. The upper and lower sinking troughs are arranged vertically opposite each other so that the reverse tension plate forms a ring-shaped safety valve. The safety valve is located between the upper and lower sinking troughs, and the thickness of the safety valve is less than the thickness of the reverse tension plate. 5) Stamp the top of the safety valve to form an annular upper groove on the top of the safety valve, and stamp the bottom of the safety valve to form an annular lower groove on the bottom of the safety valve; The upper and lower grooves are aligned vertically to form an outer perimeter burst line for the safety valve. The outer perimeter burst line is formed between the upper and lower grooves, and the thickness of the outer perimeter burst line is less than the thickness of the safety valve. 6) Stamp the safety valve to form an annular central groove on the top of the safety valve, the safety valve having a central burst line located below the central groove.
[0007] Furthermore, in the processing step 1), two electrode holes are formed on the top cover plate, the two electrode holes are arranged at intervals, and the injection hole is formed between the two electrode holes.
[0008] Furthermore, in the processing step 3), the forward stretching ring and the reverse stretching ring are surrounded to form a hollow annular groove, and the bottom of the annular groove is open to form an annular bottom opening.
[0009] Furthermore, in processing step 5), the width of the upper groove gradually increases along the upward direction of the upper groove; and the width of the lower groove gradually increases along the downward direction of the lower groove.
[0010] Furthermore, in the processing step 6), the width of the central groove gradually increases along the direction from bottom to top.
[0011] Furthermore, in the processing step 5), the cross-section of the upper groove is trapezoidal, and the two sides of the upper groove have inclined upper sidewalls, the inclination angle of which is no greater than 60°.
[0012] Furthermore, in the processing step 5), the cross-section of the lower groove is trapezoidal, and the two sides of the lower groove have inclined lower sidewalls, the inclination angle of which is no greater than 60°.
[0013] Furthermore, in the processing step 6), after the outer periphery burst line and the middle burst line are formed on the safety valve, the safety valve includes an outer ring, a middle ring and a center. The outer ring is formed on the outer periphery of the outer periphery burst line and is connected to the reverse tension plate. The central ring is formed between the outer blast line and the central blast line, the central part is formed in the middle of the safety valve, and the central blast line is formed on the outer periphery of the central part; the central ring is arranged in an upward arc shape, and the central part is arranged in an upward arc shape.
[0014] Furthermore, in processing step 6), after the safety valve forms the central burst line, pole assembly is installed in the two pole holes, and the pole assembly is welded to the top cover plate as a whole. The assembly steps of the pole assembly are as follows: 6.1) Provide an annular backing ring, the backing ring surrounds and forms a hollow area, the outer periphery of the backing ring is provided with an annular surrounding piece protruding upward, the surrounding piece and the backing ring include a surrounding cavity forming a top opening, the hollow area and the bottom of the surrounding cavity are connected; a sealing ring is placed on the backing ring, the outer side of the sealing ring is provided with a soft rubber layer, the soft rubber layer abuts against the surrounding piece; 6.2) Provide an electrode post, wherein the upper part of the electrode post forms an upper section and the lower part of the electrode post forms a lower section, and the outer periphery of the lower section is wrapped with an outer plastic ring, the outer plastic ring having an outer peripheral section surrounding the outer periphery of the lower section and a top section abutting the top of the lower section. The pole is placed in the surrounding cavity, with the bottom of the lower section and the bottom of the outer plastic ring pressing against the sealing ring respectively. The upper section passes through the top opening and extends to the top of the surrounding cavity. An annular installation interval is formed between the outer plastic ring and the surrounding piece. 6.3) The upper part of the surrounding piece is bent inward to form a downward-curved ring, the curved ring and the upper section are arranged facing each other, and an outer periphery is formed between the outer peripheries of the upper section of the curved ring. The bending ring presses against the top section, applying a downward pressure to the top section so that the bottom ring presses against and seals from top to bottom. The sealing ring is squeezed and elastically compressed and deformed so that the soft rubber layer is compressed and deformed synchronously. The soft rubber layer is embedded into the installation interval from bottom to top. 6.4) An upper plastic ring is injection molded on the outer periphery of the upper section, and the curved ring is wrapped in the upper plastic ring; the upper plastic ring has an outer section wrapped around the outer periphery of the surrounding piece and a filling section filled in the outer periphery interval, the filling section is wrapped around the outer periphery of the upper section, and the filling section abuts against the top of the lower section and is connected with the top section to form an integral part; 6.5) The bottom ring is embedded in the pole hole, the outer section presses against the top cover from top to bottom, the bottom of the bottom ring is flush with the bottom of the top cover, the outer periphery of the bottom ring abuts against the inner sidewall of the pole hole, and the bottom ring and the top cover are welded together as one piece.
[0015] Furthermore, in assembly step 6.1), the sealing ring has an inner ring on its inner side and an outer ring on its outer side, with the soft rubber layer covering the outer ring; a hard ring is provided in the middle of the inner ring, and two opposing elastic rings are provided in the sealing ring; the inner end of the elastic ring is abutted against the hard ring, the outer end of the elastic ring extends to the outer ring, and the outer ends of the two elastic rings are arranged vertically separated; along the direction from the outer end to the inner end of the elastic ring, the elastic ring is bent downwards; In assembly step 6.3), during the process of the sealing ring being squeezed and elastically compressed and deformed, the two elastic rings elastically deform towards each other, the hard ring restricts the sealing ring from elastically deforming inward, the sealing ring elastically deforms outward, and the soft rubber layer is synchronously compressed and deformed outward, so that the soft rubber layer is embedded into the installation gap from bottom to top.
[0016] Compared with the prior art, the integrated forming method of the top cover plate and the safety valve provided by the present invention continuously performs the stamping forming on the same top cover plate, so that the top cover plate and the safety valve are integrally formed on the same panel. In this way, there is no need to process the safety valve separately and then assemble it onto the top cover plate, which reduces the independent stamping and assembly processes of the safety valve and improves the processing efficiency of the top cover plate and the safety valve.
[0017] Specifically, the processing has the following advantages: 1) The thickness of the forward stretching plate and the reverse stretching plate after two stretching processes is less than that of the main body of the top cover plate. By using the forward stretching ring and the reverse stretching ring, a gradual transition in thickness can be formed between the plate and the main body of the top cover plate during the stamping and stretching process, so as to avoid abrupt changes in thickness between the stretching plate and the main body of the top cover plate.
[0018] 2) By arranging the upper and lower sinking tanks in a vertically opposite manner, the forming position and thickness of the safety valve can be controlled from both the upper and lower sides.
[0019] 3) An outer rupture line is formed between the two aligning grooves. This ensures that the thickness of the outer rupture line is uniform in the circumferential direction, allowing the safety valve to break along the outer rupture line when it is under pressure.
[0020] 4) The central burst line of the safety valve increases the number of points where the safety valve will disconnect in case of rupture; when the internal gas pressure of the battery increases, both the outer and central burst lines can be ruptured under pressure. After the outer and central burst lines disconnect, the safety valve forms multiple separate openings, thereby achieving more complete pressure relief and ensuring the safety of battery use. Attached Figure Description
[0021] Figure 1 This is a schematic flowchart of the integrated molding process of the top cover plate and the safety valve provided by the present invention; Figure 2 This is a schematic diagram of the panel structure provided by the present invention; Figure 3 This is a schematic diagram of the molding structure of the top cover sheet provided by the present invention; Figure 4 This is a cross-sectional schematic diagram of the positive tension plate provided by the present invention; Figure 5 This is a cross-sectional schematic diagram of the reverse tension plate provided by the present invention; Figure 6 This is a cross-sectional schematic diagram of the safety valve provided by the present invention; Figure 7 This invention provides Figure 6 Enlarged view of the area marked A in the middle; Figure 8 This is a cross-sectional schematic diagram of the central part provided by the present invention; Figure 9 This invention provides Figure 8 Enlarged view of the area marked B in the middle; Figure 10 This is a cross-sectional schematic diagram of the pole post installation state provided by the present invention; Figure 11 This invention provides Figure 10 Enlarged view of the area marked C; Figure 12 This is a cross-sectional schematic diagram of the sealing ring provided by the present invention; In the diagram: panel 100, top cover plate 101, electrode post hole 102, injection hole 103; 200 pole, 201 upper section, 202 lower section, 203 outer peripheral section, 204 top section, 205 outer wrapping section, 206 filling section; Forward tension plate 300, forward tension ring 301, reverse tension plate 302, reverse tension ring 303, upper sinking groove 304, lower sinking groove 305, annular groove 306. Safety valve 400, outer ring 401, middle ring 402, center 403, upper groove 404, lower groove 405, outer periphery burst line 406, middle groove 407, middle burst line 408; Film ring 500, wrapping film 501, bending ring 502; The sealing ring is 600, the soft rubber layer is 601, the inner ring is 602, the outer ring is 603, the hard ring is 604, and the elastic ring is 605. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0023] The implementation of the present invention will be described in detail below with reference to specific embodiments.
[0024] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0025] Reference Figures 1-12 The image shown is a preferred embodiment of the present invention.
[0026] The method for integrally molding the top cover plate and the safety valve includes the following processing steps: 1) Provide an aluminum panel 100, cut the outer periphery of the panel 100 to make the outer periphery of the panel 100 flat, forming a top cover sheet; stamp the top cover sheet to form an electrode post hole 102 and an injection hole 103 arranged vertically through the top cover sheet. 2) Stamp the top cover plate to make the top cover plate stretch upwards in a positive direction, and form an upwardly protruding positive stretching plate 300 on the top cover plate. The thickness of the positive stretching plate 300 is less than the thickness of the panel 100. A positive stretching ring 301 is formed on the outer periphery of the positive stretching plate 300, and the positive stretching ring 301 is arranged around the outer periphery of the positive stretching plate 300. 3) Stamp the forward stretching plate 300 so that the forward stretching plate 300 is stretched downwards in the opposite direction, and a reverse stretching plate 302 is formed on the forward stretching plate 300. The thickness of the reverse stretching plate 302 is less than the thickness of the forward stretching plate 300. A reverse tension ring 303 is formed on the outer periphery of the reverse tension plate 302. The inner wall of the reverse tension ring 303 is connected to the outer periphery of the safety valve 400, and the outer side of the reverse tension ring 303 is connected to the forward tension ring 301. 4) Stamp the top of the reverse stretching plate 302 to form an upper recessed groove 304 on the top of the reverse stretching plate 302; stamp the bottom of the reverse stretching plate 302 to form a lower recessed groove 305 on the bottom of the reverse stretching plate 302. The upper sinking trough 304 and the lower sinking trough 305 are arranged opposite each other to form a safety valve 400 arranged in a ring with the reverse tension plate 302. The safety valve 400 is located between the upper sinking trough 304 and the lower sinking trough 305, and the thickness of the safety valve 400 is less than the thickness of the reverse tension plate 302. 5) Stamp the top of the safety valve 400 to form an annular upper groove 404 on the top of the safety valve 400, and stamp the bottom of the safety valve 400 to form an annular lower groove 405 on the bottom of the safety valve 400. The upper groove 404 and the lower groove 405 are arranged vertically aligned so that the safety valve 400 forms an outer rupture line 406. The outer rupture line 406 is formed between the upper groove 404 and the lower groove 405, and the thickness of the outer rupture line 406 is less than the thickness of the safety valve 400. 6) Stamp the safety valve 400 so that an annular central groove 407 is formed on the top of the safety valve 400, and the safety valve 400 has a central burst line 408, which is located below the central groove 407.
[0027] The above-mentioned method for integrally forming the top cover and safety valve involves continuous stamping on the same top cover, so that the top cover and safety valve are integrally formed on the same panel 100. This eliminates the need to process the safety valve separately and then assemble it onto the top cover, reducing the independent stamping and assembly processes for the safety valve and improving the processing efficiency of the top cover and safety valve.
[0028] Specifically, the processing has the following advantages: 1) After the forward stretching plate 300 and the reverse stretching plate 302 are stretched twice, the thickness is less than that of the main body of the top cover plate. The forward stretching ring 301 and the reverse stretching ring 303 can form a gradual transition in thickness between the main body of the top cover plate and the main body of the stamping stretching process, so as to avoid abrupt changes in thickness between the stretching plate and the main body of the top cover plate.
[0029] 2) By arranging the upper sinking tank 304 and the lower sinking tank 305 in a vertically opposite manner, the forming position and thickness of the safety valve 400 can be controlled from both the upper and lower sides.
[0030] 3) An outer rupture line 406 is formed between the two aligning grooves. In this way, the thickness of the outer rupture line 406 is uniform in the circumferential direction, so that when the safety valve 400 is ruptured under pressure, it can break along the outer rupture line 406.
[0031] 4) The central burst line 408 of the safety valve 400 increases the position where the safety valve 400 will disconnect in the event of a rupture; when the internal gas pressure of the battery increases, both the outer burst line 406 and the central burst line 408 can be ruptured under pressure. After the outer burst line 406 and the central burst line 408 disconnect, the safety valve 400 forms multiple separate openings, thereby achieving more complete pressure relief and ensuring the safety of battery use.
[0032] The central rupture line 408 mentioned in this embodiment has two functions: First, when the outer rupture line 406 fails to disconnect and release pressure normally, the central rupture line 408 ruptures under the action of the internal air pressure of the battery, and the safety valve 400 forms a pressure relief opening in the middle position to achieve pressure relief and play a dual pressure relief protection role.
[0033] On the other hand, in the structure with only the outer perimeter burst line 406, the safety valve 400 is located in the middle area within the outer perimeter burst line 406, which has a large area. When the battery is filled with electrolyte, this area is prone to up-and-down deformation under pressure, and the up-and-down deformation damages the outer perimeter burst line 406, making the burst value of the safety valve unstable.
[0034] After adding the central blast line 408, the safety valve 400 is divided into an outer ring 401, a middle ring 402, and a central ring 403 by the outer blast line 406 and the central blast line 408. Each region is bounded by the blast line, the area of each region is reduced, the fluctuation deformation of the central region under pressure is reduced, the damage to the outer blast line 406 is reduced, and the burst value of the safety valve is stable.
[0035] As an extended embodiment, in processing step 1), two pole holes 102 are formed on the top cover plate, the two pole holes 102 are arranged at intervals, and the injection hole 103 is formed between the two pole holes 102.
[0036] In this way, the holes on the top cover plate are arranged sequentially in the horizontal direction, with a compact layout. The pole hole 102 and the liquid injection hole 103 are both stamped and formed on the top cover plate, and are continuously completed on the same top cover plate as the subsequent forming process of the safety valve, thus demonstrating the processing efficiency advantage of one-piece molding.
[0037] In addition, the two terminal holes 102 are used to install the positive and negative terminals of the battery, and the electrolyte injection hole 103 is used to inject electrolyte into the battery.
[0038] As an extended embodiment, in processing step 3), a hollow annular groove 306 is formed between the forward stretching ring 301 and the reverse stretching ring 303, and the bottom of the annular groove 306 is open to form an annular bottom opening.
[0039] The forward tension ring 301 and the reverse tension ring 303 are separated by the annular groove 306. When the safety valve 400 is compressed and ruptures, the reverse tension ring 303 has a downward deformation space. The annular groove 306 and the bottom opening provide clearance for the deformation of the reverse tension ring 303, so that the movement of the reverse tension ring 303 and the safety valve 400 is not constrained by the forward tension ring 301 and the top cover plate body.
[0040] As an extended embodiment, in processing step 5), the width of the upper groove 404 gradually increases from bottom to top along the direction of the upper groove 404; and the width of the lower groove 405 gradually increases from top to bottom along the direction of the lower groove 405.
[0041] Thus, the width of the groove is narrowest and the material is thinnest at the burst line, which is the weakest point in the entire cross-section of the safety valve 400. When the safety valve 400 is subjected to the internal gas pressure of the battery, the stress is concentrated at the thinnest point, the outer peripheral burst line 406. The clear position of the cross-section allows the safety valve 400 to break along the outer peripheral burst line 406.
[0042] As an extended embodiment, in processing step 6), the width of the central groove 407 gradually increases along the direction from bottom to top.
[0043] In this way, the position of the central blast line 408 is the weakest point in the middle of the safety valve 400, so that when the safety valve 400 is under pressure, the stress is concentrated at the central blast line 408, the disconnection position is determined, and the middle of the safety valve 400 can be disconnected along the central blast line 408.
[0044] As an extended embodiment, in processing step 5), the cross-section of the upper groove 404 is trapezoidal, and the two sides of the upper groove 404 have inclined upper sidewalls, the inclination angle of the upper sidewalls being no greater than 60°.
[0045] The gentle slope of the upper sidewall provides sloping support to the bottom of the upper groove 404. Furthermore, the angle of no more than 60° ensures that the areas of the upper groove 304 and the upper groove 404 are not prone to bulging or deformation under the normal operating pressure of the battery, the outer burst line 406 remains undamaged, and the burst value of the safety valve is stable.
[0046] As an extended embodiment, in processing step 5), the cross-section of the lower groove 405 is trapezoidal, and the two sides of the lower groove 405 have inclined lower sidewalls, the inclination angle of which is no greater than 60°.
[0047] The gentle slope of the lower sidewall provides sloping support to the bottom of the lower groove 405. Furthermore, the angle of no more than 60° ensures that the areas of the lower groove 305 and the lower groove 405 are not prone to bulging or deformation under the normal operating pressure of the battery, the outer burst line 406 remains undamaged, and the burst value of the safety valve remains stable.
[0048] As an extended embodiment, in processing step 6), after the outer peripheral burst line 406 and the middle burst line 408 are formed on the safety valve 400, the safety valve 400 includes an outer ring portion 401, a middle ring portion 402 and a center portion 403. The outer ring portion 401 is formed on the outer periphery of the outer peripheral burst line 406 and is connected to the reverse tension plate 302. The middle ring 402 is formed between the outer blast line 406 and the middle blast line 408, and the central part 403 is formed in the middle of the safety valve 400. The middle blast line 408 is formed on the outer periphery of the central part 403. The middle ring 402 is arranged in an upward arc shape, and the central part 403 is arranged in an upward arc shape.
[0049] The safety valve 400 is divided into three regions: an outer ring 401, a middle ring 402, and a central ring 403 by an outer blast line 406 and a middle blast line 408, with each region bounded by a blast line.
[0050] Among them, the middle ring 402 and the center 403 are arranged in an upward arc shape, and the arc shape allows the middle ring 402 and the center 403 to store elastic deformation energy during the stamping process.
[0051] When the internal air pressure of the battery increases, the air pressure acts on the bottom surface of the arched middle ring 402 and the central part 403, with the convex surface of the arched part facing upward, and the air pressure pushes upward; when the outer perimeter burst line 406 and the central burst line 408 break, the middle ring 402 and the central part 403 lose the outer perimeter constraint, and under the combined action of elastic deformation energy and internal air pressure, they flip up and open, so that the pressure relief channel is quickly formed and the pressure relief is responded to more quickly.
[0052] As an extended embodiment, in processing step 6), after the safety valve 400 forms the central burst line 408, pole post assemblies are installed in the two pole post holes 102, and the pole post assemblies are welded to the top cover plate as a whole. The assembly steps of the pole post assemblies are as follows: 6.1) A ring-shaped backing ring 500 is provided, which surrounds and forms a hollow area. A ring-shaped surrounding piece 501 protrudes upward from the outer periphery of the backing ring 500. The surrounding piece 501 and the backing ring 500 surround and form a surrounding cavity with a top opening. The hollow area is connected to the bottom of the surrounding cavity. A sealing ring 600 is placed on the backing ring 500. A soft rubber layer 601 is provided on the outside of the sealing ring 600. The soft rubber layer 601 abuts against the surrounding piece 501. 6.2) Provide a pole post 200, the upper part of the pole post 200 forms an upper section 201, the lower part of the pole post 200 forms a lower section 202, the outer periphery of the lower section 202 is wrapped with an outer plastic ring, the outer plastic ring has an outer peripheral section 203 surrounding the outer periphery of the lower section 202 and a top section 204 abutting the top of the lower section 202; The pole post 200 is placed in the surrounding cavity, and the bottom of the lower section 202 and the bottom of the outer plastic ring press against the sealing ring 600 respectively. The upper section 201 passes through the top opening and extends to the top of the surrounding cavity; an annular installation interval is formed between the outer plastic ring and the surrounding piece 501. 6.3) The upper part of the surrounding piece 501 is bent inward to form a downward-curved ring 502. The bending ring 502 and the upper section 201 are arranged facing each other, and an outer periphery is formed between the bending ring 502 and the outer periphery of the upper section 201. The bending ring 502 presses against the top section 204, applying downward pressure to the top section 204 so that the bottom ring 500 presses against the sealing ring 600 from top to bottom. The sealing ring 600 is compressed and deformed elastically, so that the soft rubber layer 601 is compressed and deformed synchronously. The soft rubber layer 601 is embedded into the installation space from bottom to top. 6.4) An upper plastic ring is injection molded on the outer periphery of the upper section 201, and a curved ring 502 is wrapped in the upper plastic ring; the upper plastic ring has an outer wrapping section 205 wrapped around the outer periphery of the surrounding piece 501 and a filling section 206 filled in the outer periphery gap, the filling section 206 wrapping around the outer periphery of the upper section 201, the filling section 206 abutting against the top of the lower section 202, and docking with the top section 204 to form an integral part; 6.5) The bottom ring 500 is embedded in the pole hole 102, and the outer section 205 presses against the top cover from top to bottom. The bottom of the bottom ring 500 is flush with the bottom of the top cover. The outer periphery of the bottom ring 500 abuts against the inner side wall of the pole hole 102. The bottom ring 500 and the top cover are welded together as one unit.
[0053] In this way, the pole assembly is installed in the pole hole 102 of the top cover plate through assembly steps 6.1 to 6.5, achieving both sealing and fixing effects.
[0054] In terms of sealing, the bending ring 502 bends inward and presses against the top section 204 of the outer plastic ring, while the bottom ring 500 presses down against the sealing ring 600. The sealing ring 600 is compressed and deformed elastically. The soft rubber layer 601 deforms synchronously and is embedded in the installation gap between the outer plastic ring and the surrounding piece 501, filling and sealing the installation gap.
[0055] In terms of fixation, the mechanical pressing of the bending ring 502 on the top section 204, the wrapping and positioning of the upper plastic ring on the bending ring 502 and the pole post 200, and the connection between the bottom ring 500 and the top cover plate, together fix the pole post assembly on the top cover plate.
[0056] As an extended embodiment, in assembly step 6.1), the sealing ring 600 has an annular inner ring 602 on its inner side and an annular outer ring 603 on its outer side, with a soft rubber layer 601 covering the outer ring 603; a hard ring 604 is provided in the middle of the inner ring 602, and two opposing elastic rings 605 are provided in the sealing ring 600; the inner end of the elastic ring 605 is abutted on the hard ring 604, and the outer end of the elastic ring 605 extends to the outer ring 603, with the outer ends of the two elastic rings 605 arranged vertically and vertically; along the direction from the outer end to the inner end of the elastic ring 605, the elastic ring 605 is bent downwards; In assembly step 6.3), during the process of the sealing ring 600 being squeezed and elastically compressed and deformed, the two elastic rings 605 elastically deform towards each other, the hard ring 604 restricts the sealing ring 600 to elastically deform inward, the sealing ring 600 elastically deforms outward, and the soft rubber layer 601 is simultaneously compressed and deformed outward, so that the soft rubber layer 601 is embedded into the installation space from bottom to top.
[0057] Thus, when the sealing ring 600 is compressed, the two elastic rings 605 deform elastically towards each other. The inner end of the elastic ring 605 presses against the hard ring 604, while the hard ring 604 provides rigid resistance, restricting the elastic ring 605 from deforming inward. The deformation direction of the elastic ring 605 is constrained to outward.
[0058] The elastic ring 605 applies force outward, pushing the sealing ring 600 to deform outward. The soft rubber layer 601 covering the outer ring 603 is simultaneously compressed and deformed outward, so that it can be embedded into the installation interval from bottom to top, filling and sealing the gap between the pole post 200 and the surrounding piece 501.
[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A method of integrally forming a top cover plate with a safety valve, characterized by, The processing steps include the following: 1) Provide an aluminum panel, and cut the outer periphery of the panel to make the outer periphery of the panel flat to form a top cover sheet; stamp the top cover sheet to form pole holes and liquid injection holes arranged vertically through the top cover sheet; 2) Stamp the top cover sheet to stretch it upwards, forming an upwardly protruding forward stretching plate on the top cover sheet. The thickness of the forward stretching plate is less than the thickness of the panel. A forward stretching ring is formed on the outer periphery of the forward stretching plate, and the forward stretching ring is arranged around the outer periphery of the forward stretching plate. 3) Stamp the forward stretching plate to stretch the forward stretching plate downwards in the opposite direction, forming a reverse stretching plate on the forward stretching plate, the thickness of the reverse stretching plate being less than the thickness of the forward stretching plate; The outer periphery of the reverse tension plate forms a reverse tension ring, the inner sidewall of the reverse tension ring is abutted against the outer periphery of the safety valve, and the outer side of the reverse tension ring is abutted against the forward tension ring. 4) Stamp the top of the reverse stretching plate to form an upper recessed groove on the top of the reverse stretching plate; stamp the bottom of the reverse stretching plate to form a lower recessed groove on the bottom of the reverse stretching plate. The upper and lower sinking troughs are arranged vertically opposite each other so that the reverse tension plate forms a ring-shaped safety valve. The safety valve is located between the upper and lower sinking troughs, and the thickness of the safety valve is less than the thickness of the reverse tension plate. 5) Stamp the top of the safety valve to form an annular upper groove on the top of the safety valve, and stamp the bottom of the safety valve to form an annular lower groove on the bottom of the safety valve; The upper and lower grooves are aligned vertically to form an outer perimeter burst line for the safety valve. The outer perimeter burst line is formed between the upper and lower grooves, and the thickness of the outer perimeter burst line is less than the thickness of the safety valve. 6) Stamp the safety valve to form an annular central groove on the top of the safety valve, the safety valve having a central burst line located below the central groove.
2. The method for integrally molding the top cover and safety valve as described in claim 1, characterized in that, In the processing step 1), two electrode holes are formed on the top cover plate, the two electrode holes are arranged at intervals, and the liquid injection hole is formed between the two electrode holes.
3. The method for integrally molding the top cover and safety valve as described in claim 1, characterized in that, In the processing step 3), the forward stretching ring and the reverse stretching ring are surrounded to form a hollow annular groove, and the bottom of the annular groove is open to form an annular bottom opening.
4. The method for integrally molding the top cover and safety valve as described in claim 1, characterized in that, In processing step 5), the width of the upper groove gradually increases from bottom to top; and the width of the lower groove gradually increases from top to bottom.
5. The method for integrally molding the top cover and safety valve as described in claim 1, characterized in that, In processing step 6), the width of the central groove gradually increases from bottom to top.
6. The method for integrally molding the top cover and safety valve as described in claim 1, characterized in that, In the processing step 5), the cross-section of the upper groove is trapezoidal, and the two sides of the upper groove have inclined upper sidewalls, the inclination angle of which is no greater than 60°.
7. The method for integrally molding the top cover and safety valve as described in claim 1, characterized in that, In the processing step 5), the cross-section of the lower groove is trapezoidal, and the two sides of the lower groove have inclined lower sidewalls, the inclination angle of which is no greater than 60°.
8. The method for integrally molding the top cover and safety valve as described in claim 1, characterized in that, In the processing step 6), after the outer periphery burst line and the middle burst line are formed on the safety valve, the safety valve includes an outer ring, a middle ring and a center. The outer ring is formed on the outer periphery of the outer periphery burst line and is connected to the reverse tension plate. The central ring is formed between the outer blast line and the central blast line, the central part is formed in the middle of the safety valve, and the central blast line is formed on the outer periphery of the central part; the central ring is arranged in an upward arc shape, and the central part is arranged in an upward arc shape.
9. The method for integrally molding the top cover and safety valve as described in any one of claims 1-8, characterized in that, In processing step 6), after the safety valve forms the central burst line, pole assembly is installed in the two pole holes, and the pole assembly is welded to the top cover plate as a whole. The assembly steps of the pole assembly are as follows: 6.1) Provide an annular backing ring, the backing ring surrounds and forms a hollow area, the outer periphery of the backing ring is provided with an annular surrounding piece protruding upward, the surrounding piece and the backing ring include a surrounding cavity forming a top opening, the hollow area and the bottom of the surrounding cavity are connected; a sealing ring is placed on the backing ring, the outer side of the sealing ring is provided with a soft rubber layer, the soft rubber layer abuts against the surrounding piece; 6.2) Provide an electrode post, wherein the upper part of the electrode post forms an upper section and the lower part of the electrode post forms a lower section, and the outer periphery of the lower section is wrapped with an outer plastic ring, the outer plastic ring having an outer peripheral section surrounding the outer periphery of the lower section and a top section abutting the top of the lower section. The pole is placed in the surrounding cavity, with the bottom of the lower section and the bottom of the outer plastic ring pressing against the sealing ring respectively. The upper section passes through the top opening and extends to the top of the surrounding cavity. An annular installation interval is formed between the outer plastic ring and the surrounding piece. 6.3) The upper part of the surrounding piece is bent inward to form a downward-curved ring, the curved ring and the upper section are arranged facing each other, and an outer periphery is formed between the outer peripheries of the upper section of the curved ring. The bending ring presses against the top section, applying a downward pressure to the top section so that the bottom ring presses against and seals from top to bottom. The sealing ring is squeezed and elastically compressed and deformed so that the soft rubber layer is compressed and deformed synchronously. The soft rubber layer is embedded into the installation interval from bottom to top. 6.4) An upper plastic ring is injection molded on the outer periphery of the upper section, and the curved ring is wrapped in the upper plastic ring; the upper plastic ring has an outer section wrapped around the outer periphery of the surrounding piece and a filling section filled in the outer periphery interval, the filling section is wrapped around the outer periphery of the upper section, and the filling section abuts against the top of the lower section and is connected with the top section to form an integral part; 6.5) The bottom ring is embedded in the pole hole, the outer section presses against the top cover from top to bottom, the bottom of the bottom ring is flush with the bottom of the top cover, the outer periphery of the bottom ring abuts against the inner sidewall of the pole hole, and the bottom ring and the top cover are welded together as one piece.
10. The method for integrally molding the top cover and safety valve as described in claim 9, characterized in that, In assembly step 6.1), the sealing ring has an inner ring on its inner side and an outer ring on its outer side, with the soft rubber layer covering the outer ring; a hard ring is provided in the middle of the inner ring, and two opposing elastic rings are provided in the sealing ring; the inner end of the elastic ring is abutted against the hard ring, the outer end of the elastic ring extends to the outer ring, and the outer ends of the two elastic rings are arranged vertically separated; along the direction from the outer end to the inner end of the elastic ring, the elastic ring is bent downwards; In assembly step 6.3), during the process of the sealing ring being squeezed and elastically compressed and deformed, the two elastic rings elastically deform towards each other, the hard ring restricts the sealing ring from elastically deforming inward, the sealing ring elastically deforms outward, and the soft rubber layer is synchronously compressed and deformed outward, so that the soft rubber layer is embedded into the installation gap from bottom to top.