A device for laser welding of an aluminum bar of a battery cell to prevent welding deviation

Abstract

The application relates to the technical field of power battery manufacturing, in particular to a device for preventing welding deviation of a battery core laser-welded aluminum row, which comprises a workbench, support frames are fixedly connected to the front and back sides of the left and right sides of the top of the workbench, and a fixing component is arranged on the inner side of the support frame; the fixing component comprises a first support plate, sliding blocks are fixedly connected to the front and back sides of the left and right sides of the first support plate, and the frame wall of the support frame is in sliding connection with the surface of the sliding blocks. In the application, the workpiece self-weight triggering mechanism is adopted, the electric or pneumatic power source required by the traditional clamping device is completely saved, energy consumption is reduced, real green production is realized, the bidirectional screw rod is matched with the synchronous belt transmission to ensure the repeated positioning accuracy, the cross net-shaped anti-skid lines provide stable clamping force, the welding deviation rate is reduced, the innovative cam-scraping plate mechanism automatically completes the cleaning of the supporting surface in each operation cycle, and the cleaning efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power battery manufacturing, in particular to a device for preventing welding deviation of a battery core laser-welded aluminum row. BACKGROUND

[0002] In the field of power battery manufacturing, the laser welding process of the aluminum row has long faced two technical problems: firstly, the welding positioning accuracy is difficult to guarantee, traditional clamping devices are mostly driven by air or electricity, and problems such as uneven clamping force and positioning deviation exist, which leads to a welding qualification rate of only about 95%, and secondly, the welding slag pollution problem is prominent, the existing equipment lacks effective automatic cleaning function, and frequent manual cleaning is required, which seriously affects the production efficiency, and the welding equipment on the market generally has the defects of high energy consumption, frequent maintenance and much manual intervention, and cannot meet the needs of the new energy industry for efficient, accurate and automated production. SUMMARY

[0003] Therefore, the application provides a device for preventing welding deviation of a battery core laser-welded aluminum row to solve the above problems.

[0004] The application provides the following technical scheme: a device for preventing welding deviation of a battery core laser-welded aluminum row, comprising a workbench, support frames are fixedly connected to the front and back of the left and right sides of the top of the workbench, and a fixing component is arranged on the inner side of the support frame.

[0005] The fixing component comprises a first support plate, sliding blocks are fixedly connected to the front and back of the left and right sides of the first support plate, the frame wall of the support frame is in sliding connection with the surface of the sliding block, second support plates are fixedly connected to the left and right sides of the bottom of the workbench, a friction-reducing coating is arranged on the contact surface of the sliding block and the support frame, and the friction-reducing coating is made of polytetrafluoroethylene material.

[0006] As a preferred scheme of the application, a bidirectional screw rod is rotatably connected to the inner wall of the second support plate, matching plates are threadedly sleeved on the left and right sides of the surface of the bidirectional screw rod, a moving plate is in sliding connection with the surface of the matching plate, a sliding groove is formed in the bottom of the moving plate, the groove wall of the sliding groove is in sliding connection with the surface of the matching plate, a spring is fixedly connected to the top of the matching plate, the top of the spring is fixedly connected to the top of the inside of the moving plate, a first limiting plate is fixedly connected to the outside of the moving plate, and a third support plate is fixedly connected to the left side of the bottom of the workbench.

[0007] As a preferred scheme of the application, the number of the moving plates is two, the two moving plates are symmetrically distributed left and right, a fixing plate is fixedly connected to the inner side of the moving plate, an anti-skid pattern is arranged on the clamping surface of the fixing plate, and the anti-skid pattern is in a cross-mesh structure.

[0008] As a preferred scheme of the present application, the left side of the first supporting plate is fixedly connected with a first toothed plate, the left end of the bidirectional screw rod is fixedly connected with a first rotating rod, the inner wall of the third supporting plate is rotatably connected with a second rotating rod, the left end of the second rotating rod and the left end of the first rotating rod are fixedly connected with synchronous wheels, the surface of the synchronous wheels is sleeved with a synchronous belt, the synchronous belt is a polyurethane synchronous belt, and the tooth surface of the synchronous belt is provided with a wear-resistant rubber layer.

[0009] As a preferred scheme of the present application, the right end of the second rotating rod is fixedly connected with a first gear, and the first gear is engaged with the first toothed plate.

[0010] As a preferred scheme of the present application, the back surface of the first supporting plate is fixedly connected with a first connecting plate, the back surface of the first supporting plate is fixedly connected with a second limiting plate, the inner wall of the first connecting plate is rotatably connected with a third rotating rod, the right end of the third rotating rod is fixedly connected with a second gear, the left side of the third rotating rod is fixedly connected with a cylindrical cam, the surface of the cylindrical cam is provided with first-to-last connected return grooves, the inner wall of the second limiting plate is slidably connected with a second connecting plate, the front side of the second connecting plate is fixedly connected with a driven rod, the groove wall of the return grooves is slidably connected with the surface of the driven rod, the back surface of the left rear supporting frame is fixedly connected with a second toothed plate, the return grooves include an inclined rising section, a horizontal maintaining section and an inclined descending section, the return grooves form a continuous closed loop track, the end of the driven rod is provided with a wear-resistant ceramic coating, and the driven rod is gap-fitted with the return grooves.

[0011] As a preferred scheme of the present application, the back surface of the first supporting plate is fixedly connected with an aluminum row supporting plate, the left side of the second connecting plate is fixedly connected with a cleaning plate, the bottom of the cleaning plate is in contact with the top of the aluminum row supporting plate, the second toothed plate is engaged with the second gear, the bottom of the cleaning plate is embedded with an elastic scraper, and the elastic scraper is in elastic contact with the top of the aluminum row supporting plate.

[0012] As a preferred scheme of the present application, the top of the workbench is fixedly connected with a supporting frame, the inside of the supporting frame is mounted with a welder, the inside of the supporting frame is provided with a laser positioner, and the projection spot of the laser positioner is coaxial with the machining point of the welder.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] In the application, by adopting the workpiece self-weight triggering mechanism, the electric or pneumatic power source required by the traditional clamping device is completely eliminated, the energy consumption is reduced, the truly green production is realized, the bidirectional screw rod is matched with the synchronous belt transmission to ensure the repeated positioning accuracy, the cross net-shaped anti-skid pattern provides stable clamping force, the welding deviation rate is reduced, the innovative cam-scraping mechanism automatically completes the cleaning of the supporting surface in each operation cycle, the cleaning efficiency is improved, the application of special materials such as polytetrafluoroethylene friction-reducing coating and wear-resistant ceramic coating prolongs the service life of the key components, prolongs the maintenance cycle, the simplified power system and automatic design reduce the manufacturing cost of the equipment, and at the same time, the labor cost is saved, the device perfectly solves the positioning accuracy, welding slag pollution and other industry pain points in the welding of power batteries through mechanical innovation, and provides reliable process equipment support for new energy battery manufacturing. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the application;

[0016] Figure 2 It is a schematic diagram of the local structure in the application; Figure 1

[0017] Figure 3 It is a schematic diagram of the local structure in the application; Figure 2

[0018] Figure 4 It is a schematic diagram of the local structure in the application; Figure 3

[0019] Figure 5 It is a structure plan view of the polishing assembly in the application; Figure 4

[0020] Figure 6 It is a structure sectional view of the matching component in the application. Figure 4

[0021] In the figure: 1, workbench; 2, support frame; 3, welder; 4, support frame; 5, fixed component; 6, second toothed plate; 501, second support plate; 502, bidirectional screw rod; 503, first rotating rod; 504, synchronous wheel; 505, synchronous belt; 506, third support plate; 507, second rotating rod; 508, first gear; 509, first toothed plate; 510, first support plate; 511, sliding block; 512, moving plate; 513, fixed plate; 514, first limiting plate; 515, spring; 516, matching plate; 517, aluminum row support plate; 518, cleaning plate; 519, second limiting plate; 520, second connecting plate; 521, driven rod; 522, cylindrical cam; 523, return groove; 524, third rotating rod; 525, first connecting plate; 526, second gear; 527, sliding groove. DETAILED DESCRIPTION ​​​​​

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] Please refer to Figures 1-6 The technical solutions provided by the present application specifically include the following embodiments.

[0024] Embodiment: A device for laser welding aluminum bars of battery cells to prevent welding deviation, comprising a workbench 1, a support frame 4 fixedly connected to the top and the left and right sides of the workbench 1, and a fixing component 5 arranged on the inner side of the support frame 4.

[0025] The fixing component 5 comprises a first support plate 510, and a sliding block 511 fixedly connected to the front and back sides of the left and right sides of the first support plate 510. The frame wall of the support frame 4 is in sliding connection with the surface of the sliding block 511. The left and right sides of the bottom of the workbench 1 are fixedly connected with a second support plate 501. The contact surface of the sliding block 511 and the support frame 4 is provided with a friction-reducing coating, which is made of polytetrafluoroethylene material. The inner wall of the second support plate 501 is rotatably connected with a bidirectional screw rod 502. The left and right sides of the surface of the bidirectional screw rod 502 are threadedly sleeved with a matching plate 516. The surface of the matching plate 516 is in sliding connection with a moving plate 512. The bottom of the moving plate 512 is provided with a sliding groove 527. The groove wall of the sliding groove 527 is in sliding connection with the surface of the matching plate 516. The top of the matching plate 516 is fixedly connected with a spring 515. The top of the spring 515 is fixedly connected with the top inside of the moving plate 512. The outer side of the moving plate 512 is fixedly connected with a first limiting plate 514. The left side of the bottom of the workbench 1 is fixedly connected with a third support plate 506. The number of the moving plates 512 is two, which are symmetrically distributed left and right. The inner side of the moving plate 512 is fixedly connected with a fixing plate 513. The clamping surface of the fixing plate 513 is provided with anti-skid lines, which are in a cross-net structure. The left side of the first support plate 510 is fixedly connected with a first toothed plate 509. The left end of the bidirectional screw rod 502 is fixedly connected with a first rotating rod 503. The inner wall of the third support plate 506 is rotatably connected with a second rotating rod 507. The left end of the second rotating rod 507 and the left end of the first rotating rod 503 are fixedly connected with a synchronous wheel 504. The surface of the synchronous wheel 504 is sleeved with a synchronous belt 505, which is made of polyurethane. The tooth surface of the synchronous belt 505 is provided with a wear-resistant rubber layer. The right end of the second rotating rod 507 is fixedly connected with a first gear 508, which is in meshing connection with the first toothed plate 509.

[0026] When the battery core aluminum bar is placed on the aluminum bar support plate 517, the weight of the workpiece will cause the entire first support plate 510 to slide downward along the support frame 4, and this downward movement is transmitted to the first gear 508 through the left side fixedly connected first tooth plate 509, which in turn drives the second rotating rod 507 to rotate. Since the second rotating rod 507 is connected to the first rotating rod 503 through a high-precision polyurethane synchronous belt 505, this transmission method ensures the synchronization and stability of power transmission, effectively avoiding the gap error that may be caused by traditional gear transmission. The rotating movement of the bidirectional screw 502 is accurately converted into the linear displacement of the matching plate 516. It is particularly noteworthy that the moving plate 512 is in sliding fit with the matching plate 516 through the sliding groove 527. This structural design not only ensures the linearity of movement, but also allows necessary flexible buffering through the spring 515 during clamping. The pre-tightening force of the spring is accurately calculated to ensure sufficient clamping force while avoiding damage to the surface of the aluminum bar. The cross-shaped anti-slip pattern on the surface of the fixed plate 513 further enhances the stability of clamping. The depth and pitch of the pattern are optimized to provide sufficient friction without leaving marks on the surface of the aluminum bar. The design concept of relying entirely on the weight of the workpiece to drive significantly reduces energy consumption and meets the green environmental protection requirements of modern manufacturing. The entire clamping process does not require additional sensors or control systems, and the self-adaptability of the mechanical structure significantly improves the reliability of the system. The design of the bidirectional screw combined with the synchronous belt transmission ensures the absolute balance of the clamping force on the left and right sides, which is crucial for ensuring the precision of laser welding. The application of polytetrafluoroethylene friction-reducing coating not only reduces the wear of sliding parts, but also makes the operation of the entire mechanism more stable and quiet.

[0027] The back surface of the first supporting plate 510 is fixedly connected with a first connecting plate 525, the back surface of the first supporting plate 510 is fixedly connected with a second limiting plate 519, the inner wall of the first connecting plate 525 is rotationally connected with a third rotating rod 524, the right end of the third rotating rod 524 is fixedly connected with a second gear 526, the left side of the third rotating rod 524 is fixedly connected with a cylindrical cam 522, the surface of the cylindrical cam 522 is provided with a first-end-to-last return groove 523, the inner wall of the second limiting plate 519 is slidingly connected with a second connecting plate 520, the front side of the second connecting plate 520 is fixedly connected with a driven rod 521, the groove wall of the return groove 523 is slidingly connected with the surface of the driven rod 521, the back surface of the left rear supporting frame 4 is fixedly connected with a second tooth plate 6, the return groove 523 comprises an inclined rising section, a horizontal maintaining section and an inclined descending section, the return groove 523 forms a continuous closed loop track, the end of the driven rod 521 is provided with a wear-resistant ceramic coating, and the driven rod 521 is gap-fitted with the return groove 523; the back surface of the first supporting plate 510 is fixedly connected with an aluminum row supporting plate 517, the left side of the second connecting plate 520 is fixedly connected with a cleaning plate 518, the bottom of the cleaning plate 518 is in contact with the top of the aluminum row supporting plate 517, the second tooth plate 6 is engaged with the second gear 526, and the bottom of the cleaning plate 518 is embedded with an elastic scraper, and the elastic scraper is in elastic contact with the top of the aluminum row supporting plate 517.

[0028] When the welding is completed and the workpiece is taken away, the first supporting plate 510 starts to rise under the action of the spring, and the rising movement is converted into the action of the cleaning mechanism through the precise gear and rack transmission system: the upward movement of the first tooth plate 509 drives the first gear 508 to reverse, and then drives the bidirectional lead screw 502 to reverse through the synchronous belt 505, so that the clamping mechanism resets; meanwhile, the engagement of the second tooth plate 6 and the second gear 526 converts the vertical movement into the rotary movement of the third rotating rod 524, and the design of the cylindrical cam 522 is the key of the cleaning mechanism, the return groove 523 processed on the surface of the cylindrical cam 522 adopts a unique three-section design of rising-horizontal-descending: the inclined rising section realizes the rapid approach of the cleaning plate, the horizontal maintaining section ensures sufficient cleaning time, and the inclined descending section completes stable reset, and the movement track is optimized through fluid mechanics simulation, so that the best cleaning effect can be obtained with minimum energy consumption, the high-performance wear-resistant ceramic coating adopted at the end of the driven rod 521 ensures the movement precision under long-term use, and the elastic scraper at the bottom of the cleaning plate 518 adopts a special polyurethane composite material, which not only ensures sufficient elasticity to fit the surface of the supporting plate, but also has excellent high-temperature resistance, compared with the traditional jet cleaning or manual cleaning, the mechanical cleaning scheme has the advantages of low noise, small energy consumption and simple maintenance, and more importantly, it realizes perfect synchronization with the production rhythm and does not increase the production cycle.

[0029] The top of the workbench 1 is fixedly connected with a support frame 2, a welder 3 is installed in the inside of the support frame 2, a laser positioner is arranged in the inside of the support frame 2, and the projection light spot of the laser positioner is coaxial with the machining point of the welder 3;

[0030] The laser positioner integrated in the inside of the support frame 2 adopts coaxial light path design, the position of the positioning light spot and the focal point of the welding laser is strictly calibrated, the spatial coincidence error is less than 0.05 mm, the positioning system is also provided with an automatic compensation function, can finely adjust according to the actual position of the aluminum row, effectively compensates the influence caused by mechanical tolerance, practical application data shows that the repeat positioning accuracy of the system reaches ±0.02 mm, fully meets the process requirements of the power battery welding.

[0031] The laser positioner integrated in the inside of the support frame 2 adopts coaxial light path design, the positioning system is also provided with an automatic compensation function, can finely adjust according to the actual position of the aluminum row, effectively compensates the influence caused by mechanical tolerance, practical application data shows that the repeat positioning accuracy of the system reaches ±0.02 mm, fully meets the process requirements of the power battery welding.

[0032] The weight of the workpiece will cause the entire first support plate 510 to slide downward along the support frame 4, and this downward movement is transmitted to the first gear 508 through the left side fixedly connected first tooth plate 509, and then drives the second rotating rod 507 to rotate. Since the second rotating rod 507 is connected with the first rotating rod 503 through the high-precision polyurethane synchronous belt 505, this transmission mode ensures the synchronization and stability of power transmission, effectively avoids the gap error that may be generated by traditional gear transmission, and the rotary motion of the bidirectional screw 502 is accurately converted into the linear displacement of the matching plate 516. It is particularly noteworthy that the moving plate 512 is in sliding fit with the matching plate 516 through the sliding groove 527. This structural design not only ensures the linearity of movement, but also allows necessary flexible buffering to be realized through the spring 515 during clamping. The pre-tightening force of the spring is accurately calculated, which can ensure sufficient clamping force while avoiding damage to the surface of the aluminum row. The cross-shaped anti-skid lines on the surface of the fixed plate 513 further enhance the stability of clamping. The depth and pitch of the lines are optimized, which can provide sufficient friction without leaving marks on the surface of the aluminum row. Through the design concept of relying entirely on the weight of the workpiece to drive, energy consumption is greatly reduced, which meets the green environmental protection requirements of modern manufacturing. The entire clamping process does not require additional sensors or control systems to participate, and the self-adaptability of the mechanical structure significantly improves the reliability of the system. The design of the bidirectional screw combined with the synchronous belt transmission ensures the absolute balance of the clamping force on the left and right sides, which is crucial for ensuring the precision of laser welding. The application of polytetrafluoroethylene friction-reducing coating not only reduces the wear of sliding parts, but also makes the operation of the entire mechanism more stable and quiet. After welding is completed and the workpiece is taken away, the first support plate 510 starts to rise under the action of the spring, and this upward movement is converted into the action of the cleaning mechanism through the precise gear and rack transmission system: the upward movement of the first tooth plate 509 drives the first gear 508 to reverse, and then drives the bidirectional screw 502 to reverse through the synchronous belt 505, so that the clamping mechanism is reset.Meanwhile, the engagement of the second toothed plate 6 and the second gear 526 converts the vertical movement into the rotational movement of the third rotating rod 524. The design of the cylindrical cam 522 is the key of the cleaning mechanism. The surface of the cylindrical cam 522 is processed with a unique three-stage design of rising-horizontal-falling. The inclined rising stage realizes the fast approach of the cleaning plate, the horizontal maintaining stage ensures the sufficient cleaning time, and the inclined falling stage completes the smooth reset. The motion trajectory is optimized through fluid dynamics simulation, which can obtain the best cleaning effect with the minimum energy consumption. The high-performance wear-resistant ceramic coating is adopted at the end of the driven rod 521, which ensures the motion accuracy in long-term use. The elastic wiper at the bottom of the cleaning plate 518 adopts a special polyurethane composite material, which not only ensures sufficient elasticity to fit the surface of the support plate, but also has excellent high-temperature resistance. Compared with the traditional jet cleaning or manual cleaning, the mechanical cleaning scheme has the advantages of low noise, small energy consumption, and simple maintenance. More importantly, it realizes perfect synchronization with the production rhythm and does not increase the production cycle.

[0033] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application.

Claims

1. An apparatus for laser welding of an aluminum busbar of a battery cell against welding bias, characterized by: Including workbench (1), both sides of the top of workbench (1) are fixedly connected with support frame (4) on both sides, the inner side of support frame (4) is equipped with fixed component (5); The fixed component (5) includes first support plate (510), the left and right sides of the first support plate (510) are fixedly connected with sliding block (511) on both sides, the frame wall of support frame (4) is connected with the surface of sliding block (511) slidingly, the left and right sides of the bottom of workbench (1) are fixedly connected with second support plate (501), the contact surface of sliding block (511) and support frame (4) is equipped with antifriction coating, the antifriction coating is polytetrafluoroethylene material; The back surface of the first support plate (510) is fixedly connected with first connecting plate (525), the back surface of the first support plate (510) is fixedly connected with second limiting plate (519), the inner wall of the first connecting plate (525) is rotatably connected with third rotating rod (524), the right end of the third rotating rod (524) is fixedly connected with second gear (526), the left side of the third rotating rod (524) is fixedly connected with cylindrical cam (522), the surface of the cylindrical cam (522) is provided with first and last connected return groove (523), the inner wall of the second limiting plate (519) is slidably connected with second connecting plate (520), the front side of the second connecting plate (520) is fixedly connected with driven rod (521), the groove wall of return groove (523) is slidably connected with the surface of driven rod (521), the back surface of the left rear support frame (4) is fixedly connected with second tooth plate (6), the return groove (523) includes inclined rising section, horizontal maintaining section and inclined descending section, the return groove (523) forms continuous closed loop track, the end of the driven rod (521) is provided with wear-resistant ceramic coating, the driven rod (521) and return groove (523) are gap matched; The back surface of the first support plate (510) is fixedly connected with aluminum row support plate (517), the left side of the second connecting plate (520) is fixedly connected with cleaning plate (518), the bottom of the cleaning plate (518) is in contact with the top of aluminum row support plate (517), the second tooth plate (6) is engaged with second gear (526), the bottom of the cleaning plate (518) is embedded with elastic scraper, the elastic scraper is in elastic contact with the top of aluminum row support plate (517).

2. The device for laser welding of the aluminum bar of the battery core to prevent welding deviation according to claim 1, characterized in that: The inner wall of the second supporting plate (501) is rotationally connected with a bidirectional screw rod (502), the left and right sides of the surface of the bidirectional screw rod (502) are threadedly sleeved with a matching plate (516), the surface of the matching plate (516) is slidably connected with a moving plate (512), the bottom of the moving plate (512) is provided with a sliding groove (527), the groove wall of the sliding groove (527) is slidably connected with the surface of the matching plate (516), the top of the matching plate (516) is fixedly connected with a spring (515), the top of the spring (515) is fixedly connected with the top of the inside of the moving plate (512), the outside of the moving plate (512) is fixedly connected with a first limiting plate (514), and the left side of the bottom of the workbench (1) is fixedly connected with a third supporting plate (506).

3. The apparatus for laser welding of battery cell aluminum straps without welding bias of claim 2, wherein: The number of the moving plates (512) is two, the two moving plates (512) are symmetrically distributed left and right, the inside of the moving plate (512) is fixedly connected with a fixed plate (513), the clamping surface of the fixed plate (513) is provided with anti-skid lines, and the anti-skid lines are cross net structures.

4. The apparatus for laser welding of battery cell aluminum straps without welding bias of claim 2, wherein: The left side of the first supporting plate (510) is fixedly connected with a first toothed plate (509), the left end of the bidirectional screw rod (502) is fixedly connected with a first rotating rod (503), the inner wall of the third supporting plate (506) is rotationally connected with a second rotating rod (507), the left end of the second rotating rod (507) and the left end of the first rotating rod (503) are fixedly connected with a synchronous wheel (504), the surface of the synchronous wheel (504) is sleeved with a synchronous belt (505), the synchronous belt (505) is a polyurethane synchronous belt, and the tooth surface of the synchronous belt (505) is provided with a wear-resistant rubber layer.

5. The apparatus for laser welding of battery cell aluminum straps without welding bias of claim 4, wherein: The right end of the second rotating rod (507) is fixedly connected with a first gear (508), and the first gear (508) is engaged with the first toothed plate (509).

6. The apparatus for laser welding of battery cell aluminum straps without welding bias of claim 1, wherein: The top of the workbench (1) is fixedly connected with a supporting frame (2), the inside of the supporting frame (2) is mounted with a welder (3), the inside of the supporting frame (2) is provided with a laser positioner, and the projection spot of the laser positioner is coaxial with the machining point of the welder (3).

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