Lithium battery top cover manufacturing process and device based on combination of spin riveting and pressure riveting

Abstract

The invention discloses a lithium battery top cover manufacturing process and device based on combination of spin riveting and pressure riveting, and belongs to the technical field of lithium battery top cover manufacturing. The lithium battery top cover manufacturing device comprises a box body, a machining platform is rotatably arranged in the box body, and a spin riveting mechanism and a pressure riveting mechanism are further arranged on the two sides in the box body correspondingly; the spin riveting mechanism and the press riveting mechanism can both conduct lifting movement and transverse movement, and a discharging mechanism is further arranged at the position, between the spin riveting mechanism and the press riveting mechanism, of the side edge of the box body. Two specific cold connection processes of spin riveting and pressure riveting are applied to the lithium battery top cover according to a specific sequence and parameter combination, so that the comprehensive advantages exceeding a single process or traditional welding are obtained.

Description

Technical Field

[0001] This invention relates to the field of lithium battery top cover manufacturing technology, and in particular to a lithium battery top cover manufacturing process and apparatus based on a combination of rotary riveting and pressure riveting. Background Technology

[0002] A lithium battery is a battery that uses lithium metal or lithium alloy as the anode material and a non-aqueous electrolyte solution. A lithium battery includes a cover structure, which comprises a positive electrode post, a conductive sheet, a top cover sheet, and a plastic cover plate. The conductive sheet is connected to the positive electrode post, the positive electrode post is insulated from the top cover sheet, and the plastic cover plate is connected to the top cover sheet.

[0003] During the processing of lithium battery cover plate structure, it is usually necessary to connect the cover plate and the terminal post. The existing main connection processes mainly use laser welding, resistance welding, single riveting, and single pressure riveting to connect the terminal post to the cover plate.

[0004] However, the heat effect of traditional welding (laser welding, resistance welding) may cause aging and failure of sealing rings (such as O-rings, sealants), or produce metal spatter and porosity, affecting sealing reliability. Furthermore, single riveting may not achieve the required high bonding strength or precise dimensional requirements. Traditional single riveting cannot meet the high riveting pressure and lateral extension requirements of large post rivets; therefore, traditional welding and single pressure riveting or rotary riveting cannot meet production needs. Summary of the Invention

[0005] This invention provides a manufacturing process and apparatus for lithium battery top covers based on a combination of rotary riveting and pressure riveting, which can solve the problem that traditional welding and single pressure riveting or rotary riveting cannot meet production needs in the prior art.

[0006] A lithium battery top cover manufacturing device based on a combination of rotary riveting and pressure riveting includes a housing, a processing platform rotatably mounted inside the housing, a rotary riveting mechanism and a pressure riveting mechanism respectively mounted on both sides of the housing, both of which can be lifted and moved laterally, and a material unloading mechanism is also mounted on the side of the housing between the rotary riveting mechanism and the pressure riveting mechanism. The housing includes a base, and the processing platform includes a rotating base plate. The rotating base plate is rotatably connected to the base. Positioning workpieces are symmetrically arranged on the rotating base plate. The positioning workpieces include a movable part that is slidably arranged on the rotating base plate. A limiting plate is fixedly arranged on the movable part. A positioning mold is detachably arranged on the limiting plate. The unloading mechanism includes two sets of adjustable-spacing first and second sliding plates, as well as two sets of liftable pallets, which can also move laterally.

[0007] Furthermore, a support column is fixedly provided inside the base of the housing, and a top mounting plate is fixedly provided at the top of the support column. An annular groove is also provided on the base, and an inner plate is fixedly provided at the bottom of the base. Two first pulleys are rotatably provided on the inner plate. The two first pulleys are connected by a first synchronous belt. One of the first pulleys is coaxial and fixedly connected to a first rotating shaft, and the other first pulley is fixedly connected to the output end of a first motor. The first motor is fixed on the base, and the first rotating shaft is fixedly connected to the processing platform. The processing platform is also slidably connected to the annular groove.

[0008] Furthermore, a back plate is fixedly provided on the rotating base plate of the processing platform at the middle position of the two positioning workpieces. The processing platform also includes a top plate, which is fixedly installed on the top mounting plate. The back plate is rotatably connected to the top plate. A limiting slider is fixedly provided at the bottom of the rotating base plate. The limiting slider is limited to the annular groove, and there is a sliding fit between the limiting slider and the annular groove.

[0009] Furthermore, the positioning workpiece includes a moving platform, which is fixedly mounted on a rotating base plate. A moving component is slidably mounted on the moving platform, and a support component is fixedly mounted on the moving component. A limiting plate is fixedly mounted on the support component, and a limiting buckle is fixedly mounted on the limiting plate. The positioning workpiece also includes support side plates located on both sides of the moving platform. The support side plates are fixedly connected to the rotating base plate, and a lifting mechanism is fixedly mounted on the support side plates. Several support rods are slidably mounted on the lifting mechanism, and pressure plates are fixedly connected to the several support rods on both sides. The pressure plates have two round holes, and the lifting mechanism can realize the up and down movement of the pressure plates. As shown in the figure, a positioning mold is engaged with the limiting buckle, and a limiting groove is formed inside the positioning mold.

[0010] Furthermore, the riveting mechanism includes a first movable slide, which is fixedly mounted on the back plate, and a riveting device is fixedly mounted on the first movable slide.

[0011] Furthermore, the riveting mechanism includes a second movable slide, which is fixedly mounted on the back plate. A riveting device is slidably mounted on the second movable slide, and the riveting device can move along the second movable slide.

[0012] Furthermore, the feeding mechanism includes a first bracket, which is fixedly connected to the top plate. The bottom of the first bracket is fixedly provided with an installation groove, and a first threaded rod is rotatably provided in the installation groove. The first threaded rod has two sets of thread groups, each of which includes threaded segments with opposite thread directions at both ends. A set of sliding plate assemblies is provided at the two sets of threads on the first threaded rod. Each set of sliding plate assemblies includes a first sliding plate and a second sliding plate. The first and second sliding plates are slidably engaged with the installation groove. The first and second sliding plates are respectively threaded with four threaded segments. The first and second sliding plates in each set of sliding plate assemblies move in opposite directions. Baffles are fixedly provided at the edges of the first and second sliding plates.

[0013] Furthermore, a third pulley is coaxially and fixedly mounted on the first threaded rod, as shown in the figure. A fourth pulley is rotatably mounted on the support column. The third pulley and the fourth pulley are connected by a second synchronous belt. A first connecting rod is also coaxially and fixedly mounted on the fourth pulley. A gearbox is fixedly mounted on the base. The gearbox contains a gear set and a drive source. Two output shafts are rotatably mounted on the gearbox. The two output shafts drive the gear set to rotate through the drive source. A fifth pulley and a sixth pulley are also rotatably mounted on the base. The fifth pulley and the sixth pulley are connected by a third synchronous belt. The two output shafts on the gearbox are coaxially and fixedly connected to the sixth pulley and the first connecting rod, respectively. A second threaded rod is coaxially and fixedly mounted on the fifth pulley.

[0014] Furthermore, a first mounting plate is fixedly mounted on the base, a second threaded rod is rotatably mounted on the first mounting plate, a second limiting rod is fixedly mounted, a movable plate is threadedly fitted on the second threaded rod, the movable plate and the second limiting rod are slidably fitted, a first telescopic cylinder is fixedly mounted on the movable plate, an intermediate plate is fixedly connected to the output end of the first telescopic cylinder, a crossbar is fixedly mounted at both ends of the intermediate plate, and a support plate is fixedly mounted at both ends of the crossbar, the two sets of support plates are respectively located between the first and second slide plates on the two sets of slide plate assemblies, a second bracket is fixedly mounted on the first bracket, the top end of the second threaded rod is rotatably connected to the second bracket, and the second limiting rod is fixedly connected to the second bracket.

[0015] A manufacturing process for lithium battery top covers based on a combination of rotary riveting and pressure riveting includes the following steps: S1: First, place the battery top cover in the positioning workpiece on the processing platform, and then start the riveting mechanism to rivet the battery top cover, so that the battery top cover pole is slightly unfolded. Then rotate the riveted battery top cover to the bottom of the pressing riveting mechanism for pressing riveting, so that the battery top cover and the pole are in complete contact and sealed. S2: After riveting and pressing the battery top cover, rotate the processed battery top cover to the unloading mechanism, remove the processed battery top cover through the pallet, transfer it to the first and second slide plates, and slide it down along the first and second slide plates to unload it.

[0016] Beneficial effects

[0017] 1. This invention completes the forming of the lithium battery top cover by using a combination of spin riveting and pressure riveting. It applies two specific cold connection processes, spin riveting (usually used for pre-fixing, plastic deformation and preliminary sealing) and pressure riveting (usually used for final forming, high strength and precision dimensional control), to the lithium battery top cover in a specific order and parameter combination to obtain comprehensive advantages that surpass a single process or traditional welding.

[0018] 2. The present invention also includes a feeding mechanism for removing the lithium battery top cover after riveting and pressure riveting. The feeding mechanism includes two sets of first and second sliding plates and two sets of support plates. The distance between the first and second sliding plates is adjustable. The support plates are inserted under the lithium battery top cover on the positioning workpiece, and then the support plates are controlled to rise, so as to remove the lithium battery top cover. The support plates are moved to the position between the first and second sliding plates. As the distance between the first and second sliding plates decreases, the lithium battery top cover can be transferred to the first and second sliding plates and slide down along the first and second sliding plates to achieve collection, avoid manual removal, improve processing efficiency, and save processing time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 This is a schematic diagram of the processing platform structure of the present invention; Figure 4 This is an enlarged schematic diagram of part A of the present invention; Figure 5 This is a schematic diagram of the riveting mechanism of the present invention; Figure 6 This is an enlarged schematic diagram of part B of the present invention; Figure 7 This is a schematic diagram of the feeding mechanism of the present invention; Figure 8 This is an enlarged schematic diagram of part C of the present invention; Figure 9 This is an enlarged schematic diagram of part D of the present invention; Figure 10 This is a schematic diagram of part of the feeding mechanism of the present invention; Figure 11 This is an enlarged schematic diagram of part E of the present invention.

[0020] Explanation of reference numerals in the attached figures: 100. Housing; 200. Machining platform; 300. Riveting mechanism; 400. Spinning riveting mechanism; 500. Material feeding mechanism; 101. Base; 102. Support column; 103. Top mounting plate; 104. Inner plate; 105. Annular slide groove; 106. First pulley; 107. First rotating shaft; 108. First synchronous belt; 109. First motor; 201. Base plate; 202. Limiting slider; 203. Back plate; 204. Top plate; 205. Moving part; 206. Supporting part; 207. Limiting buckle; 208. Lifting mechanism; 209. Support rod; 210. Round hole; 211. Pressure plate; 212. Supporting side plate; 213. Moving platform; 214. Limiting plate; 215. Positioning mold; 216. Limiting 301. Groove; 302. Second movable slide; 401. Riveting equipment; 402. First movable slide; 501. Riveting equipment; 501. First bracket; 502. Second bracket; 503. Mounting groove; 504. First threaded rod; 505. Third pulley; 506. Second synchronous belt; 507. First sliding plate; 508. Second sliding plate; 509. Baffle; 510. First mounting plate; 511. Second threaded rod; 512. Second limit rod; 513. Moving plate; 514. First telescopic cylinder; 515. Intermediate plate; 516. Crossbar; 517. Support plate; 518. Fourth pulley; 519. First connecting rod; 520. Fifth pulley; 521. Gearbox; 522. Sixth pulley; 523. Third synchronous belt. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 As shown in the figure, an embodiment of the present invention provides a lithium battery top cover manufacturing device based on a combination of rotary riveting and pressure riveting, including a housing 100, a processing platform 200 rotatably disposed inside the housing 100, a rotary riveting mechanism 400 and a pressure riveting mechanism 300 respectively disposed on both sides inside the housing 100, and a material unloading mechanism 500 disposed on the side of the housing 100 between the rotary riveting mechanism 400 and the pressure riveting mechanism 300.

[0023] like Figure 2As shown, the housing 100 includes a base 101, a support column 102 fixedly disposed inside the base 101, a top mounting plate 103 fixedly disposed at the top of the support column 102, an annular groove 105 disposed on the base 101, and an inner plate 104 fixedly disposed at the bottom of the base 101. Two first pulleys 106 are rotatably disposed on the inner plate 104. The two first pulleys 106 are connected by a first synchronous belt 108. One of the first pulleys 106 is coaxial and fixedly connected to a first rotating shaft 107. The other first pulley 106 is fixedly connected to the output end of a first motor 109. The first motor 109 is fixedly disposed on the base 101. The first rotating shaft 107 is fixedly connected to a processing platform 200. The processing platform 200 is also slidably connected to the annular groove 105. When the first motor 109 drives the first pulley 106 to rotate, the first rotating shaft 107 can be rotated synchronously, thereby enabling the processing platform 200 to move along the annular groove 105.

[0024] like Figure 3 As shown, the processing platform 200 includes a rotating base plate 201, on which positioning workpieces are symmetrically arranged. A back plate 203 is fixedly arranged on the rotating base plate 201 at the middle position of the two positioning workpieces. The processing platform 200 also includes a top plate 204, which is fixedly installed on the top mounting plate 103. The back plate 203 is rotatably connected to the top plate 204. A limiting slider 202 is fixedly arranged at the bottom of the rotating base plate 201. The limiting slider 202 is limited within the annular slide groove 105, and the limiting slider 202 and the annular slide groove 105 slide in a sliding fit.

[0025] like Figure 4 As shown, the positioning workpiece includes a moving platform 213, which is fixedly mounted on a rotating base plate 201. A moving component 205 is slidably mounted on the moving platform 213, and a support component 206 is fixedly mounted on the moving component 205. A limiting plate 214 is fixedly mounted on the support component 206, and a limiting buckle 207 is fixedly mounted on the limiting plate 214. In use, the moving component 205 can move along the moving platform 213. The specific movement method includes, but is not limited to, cylinder pushing, i.e., the cylinder is fixedly mounted on the moving platform 213, and the output end of the cylinder is fixedly connected to the moving component 205. The movable part 205 can be moved on the moving platform 213 by a cylinder. The positioning workpiece also includes support side plates 212 located on both sides of the moving platform 213. The support side plates 212 are fixedly connected to the rotating base plate 201. A lifting mechanism 208 is fixedly installed on the support side plates 212. Several support rods 209 are slidably installed on the lifting mechanism 208. Each of the several support rods 209 on both sides is fixedly connected to a pressure plate 211. The pressure plate 211 has two round holes 210. The lifting mechanism 208 can realize the up and down movement of the pressure plate 211. Figure 6 As shown, a positioning mold 215 is snapped onto the limit buckle 207, and a limit groove 216 is formed inside the positioning mold 215.

[0026] In this embodiment, the positioning workpiece is used to fix the battery top cover. When in use, the specific shape of the positioning mold 215 is adapted to the battery top cover. That is, a suitable positioning mold 215 is selected according to the specific shape of the battery top cover, and the positioning mold 215 is fixed on the positioning workpiece. Then, the battery top cover is limited in the limiting groove 216 of the positioning mold 215. Then, the moving part 205 realizes the movement of the battery top cover on the moving platform 213, which facilitates the movement of the battery top cover to the processing position. The processing position is located below the pressure plate 211. When the battery top cover moves to the bottom of the pressure plate 211, the two poles on the battery top cover correspond to the circular holes 210 on the pressure plate 211. At this time, the riveting mechanism 400 or the pressing mechanism 300 descends, and the two poles on the battery cover can be processed differently through the circular holes 210.

[0027] like Figure 3 As shown, the riveting mechanism 400 includes a first movable slide 401, which is fixedly mounted on the back plate 203. A riveting device 402 is fixedly mounted on the first movable slide 401, and the riveting device 402 can move along the first movable slide 401. Figure 5 As shown, the riveting mechanism 300 includes a second movable slide 301, which is fixedly mounted on the back plate 203. A riveting device 302 is slidably mounted on the second movable slide 301. The riveting device 302 can move along the second movable slide 301. When the riveting device 402 and the riveting device 302 are aligned with the circular hole 210 respectively, the pole post on the battery cover can be riveted and riveted.

[0028] like Figure 7 and Figure 8As shown, the unloading mechanism 500 includes a first bracket 501, which is fixedly connected to the top plate 204. A mounting groove 503 is fixedly provided at the bottom of the first bracket 501. A first threaded rod 504 is rotatably mounted within the mounting groove 503. The first threaded rod 504 has two sets of threads, each set including threaded segments with opposite thread directions at both ends. A sliding plate assembly is provided at the two sets of threads on the first threaded rod 504. Each sliding plate assembly includes a first sliding plate 507 and a second sliding plate 508. The first sliding plate 507 and the second sliding plate 508 are specifically inclined, with smooth surfaces to facilitate objects sliding down the inclined surface. In the embodiment, there are two of each of the first slide plate 507 and the second slide plate 508. Both the first slide plate 507 and the second slide plate 508 are slidably engaged with the mounting groove 503. The first slide plate 507 and the second slide plate 508 are threadedly engaged with four threaded sections respectively. In each slide plate assembly, the first slide plate 507 and the second slide plate 508 move in opposite directions. Baffles 509 are fixedly provided at the edges of the first slide plate 507 and the second slide plate 508. In use, when the first threaded rod 504 rotates, the first slide plate 507 and the second slide plate 508 move in opposite directions, which can further realize the approach or separation of the first slide plate 507 and the second slide plate 508.

[0029] like Figure 8 As shown, a third pulley 505 is coaxially and fixedly mounted on the first threaded rod 504, as... Figure 10 As shown, a fourth pulley 518 is rotatably mounted on the support column 102. The third pulley 505 and the fourth pulley 518 are connected by a second synchronous belt 506. A first connecting rod 519 is also coaxially and fixedly mounted on the fourth pulley 518. Figure 11 As shown, a gearbox 521 is fixedly mounted on the base 101. The gearbox 521 contains a gear set and a drive source. Two output shafts are rotatably mounted on the gearbox 521. The two output shafts are driven by the drive source to rotate the gear set, thereby achieving synchronous rotation of the two output shafts. A fifth pulley 520 and a sixth pulley 522 are also rotatably mounted on the base 101. The fifth pulley 520 and the sixth pulley 522 are connected by a third synchronous belt 523. The two output shafts on the gearbox 521 are coaxially and fixedly connected to the sixth pulley 522 and the first connecting rod 519, respectively. A second threaded rod 511 is coaxially and fixedly mounted on the fifth pulley 520. That is, the first connecting rod 519 and the second threaded rod 511 achieve synchronous rotation through the gearbox 521.

[0030] like Figure 7 and Figure 9As shown, a first mounting plate 510 is fixedly mounted on the base 101. A second threaded rod 511 is rotatably mounted on the first mounting plate 510, and a second limiting rod 512 is fixedly mounted on it. A movable plate 513 is threadedly engaged with the second threaded rod 511, and the movable plate 513 and the second limiting rod 512 are slidably engaged. A first telescopic cylinder 514 is fixedly mounted on the movable plate 513, and an intermediate plate 515 is fixedly connected to the output end of the first telescopic cylinder 514. Figure 7 As shown, crossbars 516 are fixed at both ends of the intermediate plate 515, and support plates 517 are fixed at both ends of the plate. The two sets of support plates 517 are respectively located between the first slide plate 507 and the second slide plate 508 on the two sets of slide plate assemblies. A second support 502 is fixed on the first bracket 501. The top end of the second threaded rod 511 is rotatably connected to the second support 502, and the second limiting rod 512 is fixedly connected to the second support 502.

[0031] In use, when the riveted lithium battery top cover moves to the unloading mechanism 500, initially, the first slide plate 507 and the second slide plate 508 on each set of slide plate assemblies are in a state of being far apart from each other. At this time, the support plate 517 is at the same height between the positioning mold 215 and the support member 206 (i.e., at the same height as the limiting plate 214). Then, the first telescopic cylinder 514 pushes the two support plates 517 simultaneously toward the positioning mold 215 until the support plate 517 moves to a position below the positioning mold 215. The support plate 517 continues to move upward (during the upward movement of the support plate 517, the first slide plate 507 and the second slide plate 508 move away from each other), and the processed battery on it is placed on the support plate. The top cover of the battery is lifted upwards until it separates from the positioning mold 215. After separation, the first telescopic cylinder 514 controls the battery cover to move towards the middle position of the first sliding plate 507 and the second sliding plate 508 until the battery cover is above the first sliding plate 507 and the second sliding plate 508. At this time, several support plates 517 are controlled to descend. As the support plates 517 descend, the first sliding plate 507 and the second sliding plate 508 approach each other. The battery cover gradually contacts the first sliding plate 507 and the second sliding plate 508 and is transferred onto the first sliding plate 507 and the second sliding plate 508. Then it slides down along the first sliding plate 507 and the second sliding plate 508 to complete the unloading of the processed battery cover.

[0032] A manufacturing process for lithium battery top covers based on a combination of rotary riveting and pressure riveting includes the following steps: S1: First, place the battery top cover inside the positioning workpiece on the processing platform 200. Then, start the riveting mechanism 400 to rivet the battery top cover. The special riveting head rivets the top surface of the terminal post. The riveting is completed at a speed of 1000-2000 r / min, a contact pressure speed of 0.1-2.0 mm / s, and about <10s. After riveting, the top surface of the rivet expands to a certain size, and the lower part of the terminal post is initially locked. Then, rotate the riveted battery top cover to the riveting mechanism 300 for riveting. Use a pressure head of a specific shape / size to apply a precisely controlled final pressure of 100-250MPa and maintain a specific pressure holding time of 0-3 seconds. Rivet the workpiece terminal post to the height of the terminal post itself (±0.05mm). The flatness of the top surface of the terminal post is <0.05mm, the height difference between the two terminals is <0.15mm, the sealing ring is compressed at 20%-45%, and the expansion distance of the top surface of the terminal post is >1.0mm. The forming process of the battery top cover is completed. S2: After riveting and pressing the battery top cover, rotate the processed battery top cover to the unloading mechanism 500, remove the processed battery top cover through the pallet 517, transfer it to the first sliding plate 507 and the second sliding plate 508, and slide it down along the first sliding plate 507 and the second sliding plate 508 to unload it.

[0033] In this embodiment, the initial plastic deformation of the riveting effectively fills the gap and compacts the sealing ring, while the precise control of the pressure riveting ensures the final sealing surface quality and pressure, providing dual protection. Pressure riveting provides a final high-strength connection, meeting the mechanical stress and vibration requirements during battery use. Both processes are cold connections, completely eliminating the heat-affected zone and protecting the sealing ring, internal electrolyte, and cell structure. Pressure riveting allows for precise control of key dimensions such as final height and flatness. The combined process has a higher tolerance for error than a single process (e.g., riveting completes pre-fixation and initial sealing, providing a good foundation for pressure riveting), reducing scrap rates. Compared to high-precision laser welding equipment, riveting and pressure riveting equipment are more cost-effective and relatively simple to maintain.

[0034] In this embodiment, the positioning mold 215 is objectively replaceable, and the specific shape of the positioning mold 215 is not further limited. That is, the positioning mold 215 can process rectangular battery top covers, circular battery top covers, etc. The positioning mold 215 can be adjusted according to the specific shape of the battery top cover to meet different usage requirements.

[0035] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A lithium battery top cover manufacturing apparatus based on a combination of rotary riveting and pressure riveting, characterized in that, The device includes a housing (100), a processing platform (200) is rotatably installed inside the housing (100), and a riveting mechanism (400) and a pressing mechanism (300) are respectively installed on both sides inside the housing (100). Both the riveting mechanism (400) and the pressing mechanism (300) can be lifted and moved laterally. A material unloading mechanism (500) is also installed on the side of the housing (100) between the riveting mechanism (400) and the pressing mechanism (300). The housing (100) includes a base (101), and the processing platform (200) includes a rotating base plate (201). The rotating base plate (201) is rotatably connected to the base (101). Positioning workpieces are symmetrically arranged on the rotating base plate (201). The positioning workpieces include a movable part (205) that is slidably arranged on the rotating base plate (201). A limiting plate (214) is fixedly arranged on the movable part (205). A positioning mold (215) is detachably arranged on the limiting plate (214). The feeding mechanism (500) includes two sets of adjustable-spacing first slide plates (507) and second slide plates (508), as well as two sets of liftable pallets (517), and the pallets (517) can also move laterally.

2. The lithium battery top cover manufacturing apparatus based on a combination of rotary riveting and pressure riveting as described in claim 1, characterized in that, The base (101) of the housing (100) is fixedly provided with a support column (102), and a top mounting plate (103) is fixedly provided at the top of the support column (102). The base (101) is also provided with an annular groove (105), and the bottom of the base (101) is also fixedly provided with an inner plate (104). Two first pulleys (106) are rotatably provided on the inner plate (104). The two first pulleys (106) are connected by a first synchronous belt (108). One of the first pulleys (106) is coaxial and fixedly connected to a first rotating shaft (107). The other first pulley (106) is fixedly connected to the output end of a first motor (109). The first motor (109) is fixed on the base (101). The first rotating shaft (107) is fixedly connected to the processing platform (200). The processing platform (200) is also slidably connected to the annular groove (105).

3. The lithium battery top cover manufacturing apparatus based on a combination of rotary riveting and pressure riveting as described in claim 2, characterized in that, The machining platform (200) has a back plate (203) fixedly installed on the rotating base plate (201) at the middle position of the two positioning workpieces. The machining platform (200) also includes a top plate (204), which is fixedly installed on the top mounting plate (103). The back plate (203) is rotatably connected to the top plate (204). The bottom of the rotating base plate (201) is fixedly provided with a limiting slider (202), which is limited to the annular slide groove (105) and slides between the limiting slider (202) and the annular slide groove (105).

4. The lithium battery top cover manufacturing apparatus based on a combination of rotary riveting and pressure riveting as described in claim 3, characterized in that, The positioning workpiece includes a moving platform (213), which is fixedly installed on a rotating base plate (201). A moving part (205) is slidably provided on the moving platform (213). A support part (206) is fixedly provided on the moving part (205). A limiting plate (214) is fixedly provided on the support part (206). A limiting buckle (207) is fixedly provided on the limiting plate (214). The positioning workpiece also includes a support side plate (212) located on both sides of the moving platform (213). The support side plate (212) is fixedly connected to the rotating base plate (201). A lifting mechanism (208) is fixedly provided on the support side plate (212). Several support rods (209) are slidably provided on the lifting mechanism (208). A pressure plate (211) is fixedly connected to the several support rods (209) on both sides. Two round holes (210) are provided on the pressure plate (211). The lifting mechanism (208) can realize the up and down movement of the pressure plate (211). As shown in Figure (6), a positioning mold (215) is attached to the limiting buckle (207), and a limiting groove (216) is opened in the positioning mold (215).

5. The lithium battery top cover manufacturing apparatus based on a combination of rotary riveting and pressure riveting as described in claim 3, characterized in that, The riveting mechanism (400) includes a first movable slide (401), which is fixedly installed on the back plate (203), and a riveting device (402) is fixedly provided on the first movable slide (401).

6. The lithium battery top cover manufacturing apparatus based on a combination of rotary riveting and pressure riveting as described in claim 1, characterized in that, The riveting mechanism (300) includes a second movable slide (301), which is fixedly installed on the back plate (203). A riveting device (302) is slidably mounted on the second movable slide (301), and the riveting device (302) can move along the second movable slide (301).

7. The lithium battery top cover manufacturing apparatus based on a combination of rotary riveting and pressure riveting as described in claim 3, characterized in that, The feeding mechanism (500) includes a first bracket (501), which is fixedly connected to the top plate (204). The bottom of the first bracket (501) is fixedly provided with an installation groove (503). A first threaded rod (504) is rotatably provided in the installation groove (503). The first threaded rod (504) is provided with two sets of thread groups. Each set of thread groups includes thread segments with opposite thread directions at both ends. A set of sliding plate assemblies is provided at the two sets of threads on the first threaded rod (504). Each set of sliding plate assemblies includes a first sliding plate (507) and a second sliding plate (508). The first sliding plate (507) and the second sliding plate (508) are both slidably engaged with the installation groove (503). The first sliding plate (507) and the second sliding plate (508) are respectively threadedly engaged with four thread segments. The first sliding plate (507) and the second sliding plate (508) in each set of sliding plate assemblies move in opposite directions. A baffle (509) is fixedly provided at the edge of the first sliding plate (507) and the second sliding plate (508).

8. The lithium battery top cover manufacturing apparatus based on a combination of rotary riveting and pressure riveting as described in claim 4, characterized in that, A third pulley (505) is coaxially and fixedly mounted on the first threaded rod (504), as shown in Figure (10). A fourth pulley (518) is rotatably mounted on the support column (102). The third pulley (505) and the fourth pulley (518) are connected by a second synchronous belt (506). A first connecting rod (519) is also coaxially and fixedly mounted on the fourth pulley (518). A gearbox (521) is fixedly mounted on the base (101). The gearbox (521) contains a gear set and a drive source. 1) The upper part is provided with two output shafts, which drive the gear set to rotate through the drive source. The base (101) is also provided with a fifth pulley (520) and a sixth pulley (522). The fifth pulley (520) and the sixth pulley (522) are connected by a third synchronous belt (523). The two output shafts on the gearbox (521) are coaxial and fixedly connected to the sixth pulley (522) and the first connecting rod (519) respectively. The fifth pulley (520) is coaxial and fixedly provided with a second threaded rod (511).

9. A lithium battery top cover manufacturing apparatus based on a combination of rotary riveting and pressure riveting as described in claim 8, characterized in that, A first mounting plate (510) is fixedly mounted on the base (101). A second threaded rod (511) is rotatably mounted on the first mounting plate (510). A second limiting rod (512) is fixedly mounted on the first mounting plate (511). A movable plate (513) is threadedly fitted on the second threaded rod (511). The movable plate (513) and the second limiting rod (512) are slidably fitted. A first telescopic cylinder (514) is fixedly mounted on the movable plate (513). An intermediate plate (515) is fixedly connected to the output end of the first telescopic cylinder (514). A crossbar (516) is fixedly mounted at both ends of the intermediate plate (515). A support plate (517) is fixedly mounted at both ends of the crossbar (516). The two sets of support plates (517) are respectively located between the first slide plate (507) and the second slide plate (508) on the two sets of slide plate assemblies. A second support (502) is fixedly mounted on the first bracket (501). The top end of the second threaded rod (511) is rotatably connected to the second support (502). The second limiting rod (512) is fixedly connected to the second support (502).

10. A lithium battery top cover manufacturing process based on a combination of rotary riveting and pressure riveting, applied to a lithium battery top cover manufacturing apparatus based on a combination of rotary riveting and pressure riveting as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: First, place the battery top cover in the positioning workpiece on the processing platform (200), and then start the riveting mechanism (400) to rivet the battery top cover, so that the battery top cover pole is slightly unfolded. Then rotate the riveted battery top cover to the riveting mechanism (300) for riveting, so that the battery top cover and pole are in complete contact and sealed. S2: After riveting and pressing the battery top cover, rotate the processed battery top cover to the unloading mechanism (500), remove the processed battery top cover through the tray (517), transfer it to the first slide plate (507) and the second slide plate (508), and slide it down along the first slide plate (507) and the second slide plate (508) to unload it.

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