Battery cell protection plate welding device of lithium battery

Abstract

The invention discloses a welding device for a battery cell protection plate of a lithium battery. The welding device comprises a mounting rack, and a feeding assembly, a lifting assembly, a distributing assembly, a welding assembly and a driving assembly which are assembled on the mounting rack. The feeding assembly is horizontally arranged; the lifting assembly is located in the gap of the feeding assembly. The material distribution assembly comprises a rotating support, a press-fit mechanism and assembling clamps, the press-fit mechanism and the assembling clamps are distributed in an annular array mode, the rotating support rotates around the vertical axis, the press-fit mechanism drives the assembling clamps to ascend and descend, and one set of the assembling clamps are located over the lifting assembly during operation; the welding assembly is arranged between the assembling clamp and the lifting assembly. The driving assembly comprises a gear motor, a shunting transmission mechanism and two groups of ratchet mechanisms arranged reversely, the gear motor is in power connection with the ratchet mechanisms, one group of ratchet mechanism is connected with the feeding assembly, and the other group of ratchet mechanism is connected with the lifting assembly and the distributing assembly through the shunting transmission mechanism. Through the automatic and high-precision design, the production efficiency, the welding quality and the product consistency can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery assembly, in particular to a welding device for a lithium battery cell protection plate. Background Art

[0002] With the growing global demand for renewable energy and efficient energy storage, lithium-ion batteries, as a high-energy-density, long-cycle-life, and environmentally friendly energy storage solution, have been widely used in electric vehicles, portable electronic devices, energy storage systems, and other fields. The performance and safety of lithium-ion batteries depend largely on the precise assembly and high-quality welding of their internal structure. In particular, the welding quality of the cell protection plate directly affects the stability of the battery's electrical connections and overall safety.

[0003] The traditional welding process for lithium battery cell protection boards relies heavily on manual labor, which is not only inefficient but also difficult to ensure consistent and precise welding. Manual operations are also susceptible to operator skill and fatigue, leading to inconsistent product quality. Furthermore, traditional welding equipment often has limited functionality, making it difficult to implement automated assembly lines and meet the demands of large-scale production.

[0004] To improve production efficiency and weld quality, automated welding equipment has been gradually introduced into lithium battery production lines. These devices typically include basic functional modules such as feeding, positioning, and welding. However, practical applications still present some challenges. For example, insufficient coordination between the feeding and welding components leads to inaccurate welding positions; insufficient positioning accuracy of the lifting components affects welding stability; and the low degree of automation of the material distribution components still requires manual intervention. These issues not only reduce production efficiency but also increase production costs. Summary of the Invention

[0005] In view of the above-mentioned shortcomings in the prior art, the purpose of the present invention is to provide a lithium battery cell protection plate welding device, which improves production efficiency, welding quality and product consistency, reduces labor costs and maintenance difficulty, and has broad application prospects and significant economic benefits.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a lithium battery cell protection plate welding device, including a mounting frame and a feeding assembly, a lifting assembly, a cloth assembly, a welding assembly and a driving assembly assembled on the mounting frame.

[0007] The feeding assembly is arranged on the mounting frame in a horizontal direction and is used to transport lithium batteries. The lifting assembly is arranged in the gap of the feeding assembly and is used to drive the lithium batteries to move up and down.

[0008] The cloth assembly includes a rotating bracket and multiple sets of pressing mechanisms and assembly fixtures assembled on the rotating bracket and distributed in a circular array. The rotating bracket rotates around a vertical axis. The pressing mechanism is dynamically connected to the assembly fixture and drives the assembly fixture to move up and down on the rotating bracket. When the assembly fixture rotates with the rotating bracket, there is a group of assembly fixtures directly above the lifting assembly, and the welding assembly is arranged between the assembly fixture and the lifting assembly.

[0009] The driving assembly includes a reduction motor, a diverter transmission mechanism, and two groups of ratchet mechanisms arranged in opposite directions. The reduction motor maintains a power connection with the two groups of ratchet mechanisms, one group of the ratchet mechanisms maintains a power connection with the feeding assembly, and the other group of the ratchet mechanisms maintains a power connection with the lifting assembly and the cloth assembly through the diverter transmission mechanism.

[0010] In the above technical solution, in order to ensure the stable assembly and welding of the cell protection plate of the lithium battery and to ensure efficient assembly of the lithium battery, the following technical solution for lithium batteries is provided: The lithium battery includes a battery package, an insulating pad, a battery cell protection plate, and a protective cover. An assembly pad is provided on the top of the battery package, and electrode heads are led out on both sides of the assembly pad. The insulating pad is bonded to the assembly pad, and the battery cell protection plate is bonded to the insulating pad. Electrode ears that maintain electrical connection with the electrode heads are led out on the battery cell protection plate. The protective cover is bonded to the battery package and arranged on the periphery of the assembly pad. The top inner wall of the protective cover is in contact with the battery cell protection plate.

[0011] In the above technical solution, in order to ensure that the feeding assembly can be stably assembled on the mounting rack and realize stable transmission of lithium batteries, the following technical solution for the feeding assembly is provided: The feeding assembly includes multiple groups of transmission rollers rotatably mounted on the mounting frame and evenly arranged along the same horizontal direction. The same end of each group of transmission rollers is fixedly connected to a transmission sprocket A. The transmission sprockets A arranged on two adjacent groups of transmission rollers realize chain transmission through chains, and the transmitted battery packages are arranged on the transmission rollers.

[0012] In the above technical solution, in order to ensure that the lifting assembly can be stably assembled on the mounting frame and realize coordinated installation with the feeding assembly, and to ensure that the lifting assembly can drive the battery package to rise and fall stably, the following technical solution for the lifting assembly is provided: The lifting assembly includes two groups of symmetrically arranged positioning seats and a reciprocating screw that is rotated to the positioning seats. The positioning seats are arranged in the gap between two adjacent groups of transmission rollers. The positioning seats are provided with positioning grooves that are nested and matched with the battery package. Connecting wing seats are fixed on both sides of the positioning seats, and each group of connecting wing seats is rotated to a group of reciprocating screws arranged in the vertical direction.

[0013] The lifting assembly also includes a driving shaft rotatably mounted on the mounting frame and arranged in the horizontal direction. The bottom end of each group of reciprocating screws is fixedly connected to a synchronous wheel A, and the synchronous wheel A corresponding to the same positioning seat is power-connected through a synchronous belt. The top ends of the two groups of reciprocating screws arranged on the same side of the mounting frame are fixedly connected to a transmission bevel gear A. Two groups of driving bevel gears A are fixedly connected to the driving shaft, and the two groups of driving bevel gears A are respectively engaged with the two groups of transmission bevel gears A.

[0014] In the above technical solution, in order to ensure that the reduction motor in the drive assembly can stably transmit power to the two sets of ratchet mechanisms and ensure that the two sets of ratchet mechanisms are powered by the feeding assembly and the diversion transmission mechanism, the following technical solution is provided: The ratchet mechanism includes a mounting shaft, an inner ratchet, and a pawl. The mounting shaft is arranged at the axis center of the inner ratchet. The pawl is rotatably mounted on the periphery of the mounting shaft and remains engaged with the inner ratchet. The mounting shaft is also equipped with a spring that remains in contact with the pawl. A transmission sprocket B is fixedly connected to the mounting shaft. The transmission sprockets B in the two sets of ratchet mechanisms realize chain transmission through chains. The output shaft of the reduction motor is coaxially fixed to the mounting shaft in one set of ratchet mechanisms.

[0015] The inner ratchet in one group of ratchet mechanisms is coaxially fixed to one group of transmission rollers in the feeding assembly, and the inner ratchet in the other group of ratchet mechanisms is dynamically connected to the diversion transmission mechanism.

[0016] In the above technical solution, in order to ensure that the diversion transmission mechanism can stably receive the power transmitted by the corresponding ratchet mechanism and drive the lifting assembly and the cloth assembly to operate independently, the following technical solution is provided.

[0017] The diversion transmission mechanism includes a spline shaft, a telescopic cylinder A, a locking groove A, a locking groove B, and a locking joint A and a locking joint B that are coaxially fixed and respectively nested and locked with the locking groove A and the locking groove B. The spline shaft is rotatably mounted on the mounting frame and coaxially fixed with the inner ratchet in one group of the ratchet mechanisms. The spline shaft passes through the axial arrangement of the locking groove A and the locking groove B. The locking joint A and the locking joint B are symmetrically arranged and both are slidably plugged with the spline shaft. The telescopic cylinder A is fixedly mounted on the mounting frame, and the movable end of the telescopic cylinder A is fixed with a connecting piece. The locking joint A and the locking joint B are rotatably mounted on the connecting piece. The locking groove A and the locking groove B are both rotatably mounted on the mounting frame. A driving bevel gear B is coaxially fixed on the locking groove A, and a transmission bevel gear B that is meshed with the driving bevel gear B is fixed on the driving shaft.

[0018] In the above technical solution, in order to ensure that the cloth distribution assembly can be stably installed on the mounting frame, realize the power connection between the shunt transmission mechanism and the cloth distribution assembly, and ensure that the various components in the cloth distribution assembly can achieve coordinated operation, the following technical solution for the cloth distribution assembly is provided: The rotating bracket is rotatably mounted on the mounting frame, a transmission bevel gear C is fixedly connected to the axis of the rotating bracket, and a driving bevel gear C that is meshed with the transmission bevel gear C is fixedly connected to the axis of the locking groove B.

[0019] The pressing mechanism includes a telescopic cylinder B and a guide rod B. The telescopic cylinder B is fixedly installed on the rotating bracket and arranged in the vertical direction. The movable end of the telescopic cylinder B is fixedly connected to the assembly fixture. The guide rod B is fixedly installed on the assembly fixture and arranged in the vertical direction. The guide rod B maintains a sliding connection with the rotating bracket.

[0020] In the above technical solution, in order to ensure that the insulating pad, battery protection plate, and protective cover to be assembled are stably assembled to the corresponding assembly fixture of the fabric component to ensure the assembly efficiency of the lithium battery, the following technical solution is provided: It also includes a robotic arm fixedly mounted on the mounting frame, the robotic arm is equipped with a transfer fixture, and the insulating pad, battery cell protection plate, and protective cover can be clamped and transported by the assembly fixture and the transfer fixture.

[0021] In the above technical solution, in order to ensure that the welding assembly can be stably assembled on the mounting frame and to achieve stable welding of the battery cell protection plate with the help of the welding assembly, the following technical solutions are provided: The welding assembly includes an assembly bracket, a sliding bracket, a welding gun, an adjusting screw, and a driving motor. The assembly bracket is fixedly mounted on the mounting frame, and a horizontally arranged guide rod C is fixedly connected to the assembly bracket. The sliding bracket includes two groups slidably mounted on the guide rod C, and the two groups of sliding brackets are fixedly connected to a welding gun that maintains a horizontal arrangement. The two ends of each group of sliding brackets are screwed with the adjusting screws, and each group of adjusting screws is rotatably mounted on the assembly bracket, and the end of each group of adjusting screws is fixedly connected to a synchronous wheel B. The synchronous wheels B provided on the two groups of adjusting screws on the same sliding bracket are power-connected through a synchronous belt. One of the groups of adjusting screws matched with the two groups of sliding brackets is coaxially fixedly connected through a connecting shaft. The driving motor is fixedly mounted on the assembly bracket, and a driving bevel gear D is fixedly connected to the output shaft of the driving motor, and the end of one group of adjusting screws is fixedly connected to a transmission bevel gear D that is meshed with the driving bevel gear D.

[0022] Beneficial effects of the present invention: 1. Improved production efficiency. Through the highly integrated and coordinated operation of the feeding, lifting, distribution, welding, and drive assemblies, fully automated welding of lithium battery cell protection plates is achieved. The feeding assembly ensures stable transfer of lithium batteries, the lifting assembly precisely positions them, the distribution assembly automatically assembles the cell protection plates and accessories, and the welding assembly ensures high-quality welds. This automated assembly line significantly reduces manual intervention, significantly improves production efficiency, and meets the needs of large-scale production.

[0023] 2. Improved welding accuracy and consistency. Precise positioning of the lifting assembly and symmetrical adjustment of the welding assembly ensure precise alignment and welding of the cell protection plate and lithium battery electrode tips. The welding gun in the welding assembly achieves symmetrical movement by adjusting the lead screw and timing belt, ensuring even distribution of welding pressure and avoiding welding defects caused by misalignment or uneven pressure in traditional welding. This high-precision welding process significantly improves welding quality and ensures product consistency and reliability.

[0024] 3. Enhanced equipment coordination and stability: The drive assembly, through a combination of a reduction motor, ratchet mechanism, and shunt transmission mechanism, achieves coordinated power distribution among the feed, lift, and distribution components. The forward and reverse rotation control of the reduction motor flexibly switches power transmission paths, ensuring that all components work together at the correct time. The shunt transmission mechanism, through the nested design of locking joints and locking slots, achieves precise power distribution, avoiding interference and conflicts in power transmission and ensuring stable and coordinated equipment operation.

[0025] 4. Reduce labor costs and operational difficulty. By introducing a robotic arm and transfer fixture, in conjunction with the fabric assembly, the automated transfer and assembly of insulating pads, cell protection boards, and protective covers is achieved. This automated assembly method not only reduces labor costs but also reduces dependence on operator skill and eases operational difficulty.

[0026] 5. Improve product quality and safety. Through precise positioning, stable welding, and automated assembly, the reliable connection between the battery protection board and the lithium battery electrode head is ensured, avoiding electrical connection failure caused by poor welding. The automated assembly of the protective cover further enhances the overall protection performance of the lithium battery, improving the safety and service life of the product.

[0027] In summary, the lithium battery cell protection board welding device provided by this solution significantly improves production efficiency, welding quality and product consistency through its automated, high-precision and high-stability design, while reducing labor costs and maintenance difficulty. It has broad application prospects and significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 A schematic structural diagram of another perspective of the present invention; Figure 3 This is a schematic diagram of the structure of a lithium battery in a disassembled state; Figure 4 It is a structural diagram of the feeding component installed in the mounting rack; Figure 5 This is a structural diagram of the combination of the lifting component and the feeding component; Figure 6 This is a schematic diagram of the structure of the positioning seat and the battery packaging body; Figure 7 This is a structural diagram of the combination of the cloth component, lifting component, and robotic arm; Figure 8 Schematic diagram of the structure of the assembly fixture and transfer fixture when transferring the battery cell protection board; Figure 9 This is a schematic diagram of the structure of the driving component, feeding component, lifting component, and material distribution component; Figure 10 This is a schematic diagram of the structure of the ratchet mechanism in a disassembled state; Figure 11 Schematic diagram of the structure of the shunt transmission mechanism; Figure 12 It is a detailed schematic diagram of the diversion transmission mechanism; Figure 13 is a structural diagram of a welding assembly; Figure 14 Detailed diagram of the welded assembly.

[0029] In the figure: 1 mounting frame, 11 lifting guide groove, 12 guide rod A, 2 feeding assembly, 21 transmission roller, 22 transmission sprocket A, 3 lifting assembly, 31 positioning seat, 311 positioning groove, 312 connecting wing seat, 32 reciprocating screw, 321 synchronous wheel A, 322 transmission bevel gear A, 33 driving shaft, 331 driving bevel gear A, 332 transmission bevel gear B, 4 fabric assembly, 41 rotating bracket, 411 transmission bevel gear C, 42 pressing mechanism, 421 telescopic cylinder B, 422 guide rod B, 43 assembly fixture, 5 welding assembly, 51 assembly bracket, 511 guide rod C, 52 sliding bracket, 53 welding gun, 54 adjusting screw, 541 synchronous wheel B, 542 connecting shaft, 543 transmission bevel gear D, 55 driving Motor, 551 driving bevel gear D, 6 driving assembly, 61 reduction motor, 62 shunt transmission mechanism, 621 spline shaft, 622 telescopic cylinder A, 6221 connecting piece, 623 locking groove A, 6231 driving bevel gear B, 624 locking groove B, 6241 driving bevel gear C, 625 locking joint A, 626 locking joint B, 63 ratchet mechanism, 631 mounting shaft, 632 inner ratchet, 633 pawl, 634 reed, 635 driving sprocket B, 71 battery package, 711 assembly pad, 712 electrode head, 72 insulating pad, 73 battery cell protection board, 731 electrode ear, 732 liquid crystal display module, 733 interface end, 74 protective cover, 741 make way port, 8 robotic arm, 81 transfer fixture. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1 See also Figure 1-Figure 3 A lithium battery cell protection plate welding device includes a mounting frame 1 and a feeding assembly 2, a lifting assembly 3, a material distribution assembly 4, a welding assembly 5 and a driving assembly 6 assembled on the mounting frame 1.

[0032] The feeding assembly 2 is arranged on the mounting frame 1 in a horizontal direction and is used to transport lithium batteries. The lifting assembly 3 is arranged in the gap of the feeding assembly 2 and is used to drive the lithium batteries to move up and down.

[0033] The fabric assembly 4 includes a rotating bracket 41 and multiple sets of pressing mechanisms 42 and assembly fixtures 43 assembled on the rotating bracket 41 and distributed in a circular array. The rotating bracket 41 rotates around the vertical axis. The pressing mechanism 42 is power-connected to the assembly fixture 43 and drives the assembly fixture 43 to move up and down on the rotating bracket 41. When the assembly fixture 43 operates with the rotating bracket 41, there is a group of assembly fixtures 43 directly above the lifting assembly 3, and the welding assembly 5 is arranged between the assembly fixture 43 and the lifting assembly 3.

[0034] The driving assembly 6 includes a reduction motor 61, a diverter transmission mechanism 62 and two sets of ratchet mechanisms 63 arranged in opposite directions. The reduction motor 61 maintains a power connection with the two sets of ratchet mechanisms 63, one set of ratchet mechanisms 63 maintains a power connection with the feeding assembly 2, and the other set of ratchet mechanisms 63 maintains a power connection with the lifting assembly 3 and the cloth assembly 4 through the diverter transmission mechanism 62.

[0035] The feeding assembly 2 can stably transport the lithium battery for welding the cell protection plate 73 from the upstream end. When it is transported to the position of the lifting assembly 3, the lifting assembly 3 is lifted to position the lithium battery and lifted upward to the height position of the welding assembly 5. The cell protection plate 73 and the matching accessories required for welding are received by the cloth assembly 4, and are clamped and fixed by the corresponding assembly fixtures 43 respectively. When it moves to the top of the lifting assembly 3 with the rotating bracket 41, it is driven down by the corresponding pressing mechanism 42 and assembled onto the lithium battery, and cooperates with the welding assembly 5 to realize the electrical connection between the cell protection plate 73 and the lithium battery to complete the assembly of the lithium battery.

[0036] Then, the lifting component 3 is controlled to drive the assembled lithium battery to descend and fall back onto the feeding component 2, and the feeding component 2 drives it to run and finally output it from the downstream end of the feeding component 2.

[0037] The setting of the driving component 6 can provide power for the operation of the feeding component 2, the lifting component 3 and the cloth component 4, realize the overall planning of the power source, and meet the coordinated operation of the feeding component 2, the lifting component 3 and the cloth component 4 to ensure the stable welding and assembly work of the lithium battery cell protection plate 73.

[0038] Specifically, when the reduction motor 61 rotates forward, it can stably transmit power to the feed assembly 2 via the corresponding ratchet mechanism 63, ensuring that the feed assembly 2 can stably transport the lithium battery. When the lithium battery reaches the position of the lifting assembly 3, the reduction motor 61 is controlled to reverse to transmit power to the other set of ratchet mechanisms 63. The position of the diverter transmission mechanism 62 is adjusted, and the power transmitted to the ratchet mechanism 63 is transmitted to the lifting assembly 3 through the diverter transmission mechanism 62, which then drives the lithium battery upward. The position of the diverter transmission mechanism 62 is then further adjusted to transmit power to the distribution assembly 4, driving the battery cell protection plate 73 and its accessories to be assembled on the lithium battery.

[0039] In order to ensure the stable assembly and welding of the cell protection plate 73 of the lithium battery and to ensure efficient assembly of the lithium battery, the following technical solutions for lithium batteries are provided: The lithium battery includes a battery package 71, an insulating pad 72, a battery cell protection plate 73, and a protective cover 74. An assembly pad 711 is provided on the top of the battery package 71, and electrode heads 712 are led out on both sides of the assembly pad 711. The insulating pad 72 is bonded to the assembly pad 711, and the battery cell protection plate 73 is bonded to the insulating pad 72. The battery cell protection plate 73 has electrode ears 731 that maintain electrical connection with the electrode heads 712. The protective cover 74 is bonded to the battery package 71 and arranged on the periphery of the assembly pad 711. The top inner wall of the protective cover 74 is in contact with the battery cell protection plate 73.

[0040] The bottom of the insulating pad 72 is preset with adhesive backing to ensure that it can be stably assembled on the assembly pad 711. The bottom of the battery cell protection plate 73 is also preset with adhesive backing to ensure that it can be stably assembled on the insulating pad 72. The bottom of the protective cover 74 is also preset with adhesive backing to ensure that the protective cover 74 can be stably assembled on the battery package 71.

[0041] A liquid crystal display module 732 and various interface terminals 733 for charging and discharging operations and data transmission are also installed on the top of the battery cell protection board 73. Correspondingly, a clearance opening 741 corresponding to the liquid crystal display module 732 and the interface terminal 733 is also opened on the top of the protective cover 74.

[0042] The feeding assembly 2 and the lifting assembly 3 can stably transport and lift the battery package 71 , while the welding assembly 5 can ensure stable welding between the electrode head 712 and the electrode lug 731 extended from the battery cell protection plate 73 .

[0043] Example 2 See also Figure 4-Figure 6 In order to ensure that the feeding assembly 2 can be stably assembled on the mounting rack 1 and realize stable transmission of lithium batteries, the following technical solutions for the feeding assembly 2 are provided: The feeding assembly 2 includes multiple groups of transmission rollers 21 that are rotatably mounted on the mounting frame 1 and evenly arranged in the same horizontal direction. A transmission sprocket A22 is fixedly connected to the same end of each group of transmission rollers 21. The transmission sprockets A22 arranged on two adjacent groups of transmission rollers 21 realize chain transmission through chains, and the battery package 71 being transported is arranged on the transmission rollers 21.

[0044] The design of the transmission sprocket A22 and the chain can ensure that each group of transmission rollers 21 always maintains synchronous operation. When the driving assembly 6 drives the transmission sprocket to operate, the battery package 71 arranged on the transmission roller 21 can be stably transmitted.

[0045] To ensure that the transport rollers 21 can stably transport the battery package 71 , the spacing between the transport rollers 21 is designed to ensure that at least three groups of transport rollers 21 stably support the battery package 71 at each time point.

[0046] In order to ensure that the lifting assembly 3 can be stably assembled on the mounting frame 1 and can be installed in coordination with the feeding assembly 2, and to ensure that the lifting assembly 3 can drive the battery package 71 to rise and fall stably, the following technical solutions for the lifting assembly 3 are provided: The lifting assembly 3 includes two groups of symmetrically arranged positioning seats 31 and a reciprocating screw 32 that is rotated to the positioning seats 31. The positioning seats 31 are arranged in the gap between two adjacent groups of transmission rollers 21. The positioning seats 31 are provided with positioning grooves 311 that are nested and matched with the battery package 71. Connecting wing seats 312 are fixed on both sides of the positioning seats 31, and each group of connecting wing seats 312 is rotated to a group of reciprocating screws 32 arranged in the vertical direction.

[0047] The lifting assembly 3 also includes a drive shaft 33 that is rotatably mounted on the mounting frame 1 and arranged in the horizontal direction. The bottom end of each group of reciprocating screws 32 is fixedly connected to a synchronous wheel A321. The synchronous wheel A321 corresponding to the same positioning seat 31 is powered by a synchronous belt. The top ends of the two groups of reciprocating screws 32 arranged on the same side of the mounting frame 1 are fixedly connected to transmission bevel gears A322. Two groups of driving bevel gears A331 are fixed to the drive shaft 33, and the two groups of driving bevel gears A331 are respectively engaged with the two groups of transmission bevel gears A322.

[0048] A lifting guide groove 11 is provided on the side wall of the mounting frame 1 to ensure that the connecting wing seat 312 extends to the outside of the mounting frame 1, and a vertically arranged guide rod A12 is also fixed to the outside of the lifting guide groove 11. The guide rod A12 and the connecting wing seat 312 are slidably connected. The setting of the lifting guide groove 11, the guide rod A12 and the connecting wing seat 312 can ensure that the positioning seat 31 can be stably lifted and lowered in the vertical direction.

[0049] When the reduction motor 61 drives the driving shaft 33 and the driving bevel gear A331 thereon to operate, the reciprocating screws 32 respectively associated with the two groups of positioning seats 31 can be driven to operate stably through the transmission bevel gear A322, and then the combination of the synchronous wheel A321 and the synchronous belt can be used to drive each group of reciprocating screws 32 to operate stably. Since the reciprocating screw 32 is provided with two sections of thread grooves with opposite spiral directions and connected at the ends, the reciprocating screw 32 can drive the positioning seat 31 to achieve reciprocating lifting and lowering within a specific stroke range while ensuring unidirectional operation.

[0050] The positioning groove 311 provided on the positioning seat 31 includes an upper flared portion and a lower fitting portion. The positioning groove 311 of the flared portion is larger than the battery package 71 and transitions to the fitting portion in an inclined manner to ensure that the battery package 71 transmitted on the feeding assembly 2 is accurately assembled into the fitting portion of the lower layer under the transition action of the flared portion, thereby realizing the precise positioning of the battery package 71 between the two sets of positioning seats 31.

[0051] In the initial stage, the positioning seat 31 is at the bottom of its travel and is located below the conveying roller 21 to avoid interfering with the work of the feeding assembly 2 in conveying the battery package 71 .

[0052] Example 3 See also Figures 9-12 In order to ensure that the reduction motor 61 in the driving assembly 6 can stably transmit power to the two sets of ratchet mechanisms 63 and ensure that the two sets of ratchet mechanisms 63 are connected to the feeding assembly 2 and the diversion transmission mechanism, the following technical solutions are provided: The ratchet mechanism 63 includes a mounting shaft 631, an inner ratchet 632, and a pawl 633. The mounting shaft 631 is arranged at the axis center of the inner ratchet 632. The pawl 633 is rotatably mounted on the periphery of the mounting shaft 631 and remains engaged with the inner ratchet 632. The mounting shaft 631 is also equipped with a spring 634 that remains in contact with the pawl 633. A transmission sprocket B635 is fixedly connected to the mounting shaft 631. The transmission sprockets B635 in the two sets of ratchet mechanisms 63 realize chain transmission through chains. The output shaft of the reduction motor 61 is coaxially fixed to the mounting shaft 631 in one set of ratchet mechanisms 63.

[0053] The inner ratchet 632 in one set of ratchet mechanisms 63 is coaxially fixed to one set of transmission rollers 21 in the feeding assembly 2 , and the inner ratchet 632 in the other set of ratchet mechanisms 63 is power-connected to the diversion transmission mechanism 62 .

[0054] Since the installation shafts 631 in the two sets of ratchet mechanisms 63 are dynamically connected through the combination of the transmission sprocket B635 and the chain, when the reduction motor 61 drives the installation shaft 631 directly connected thereto to operate, it can drive the installation shafts 631 in the two sets of ratchet mechanisms 63 to operate synchronously.

[0055] For the ratchet mechanism 63 , the spring leaf 634 can provide an outward-expanding thrust to the pawl 633 , so as to ensure that the pawl 633 is stably engaged with the ratchet teeth on the inner pawl 633 .

[0056] Because the two ratchet mechanisms 63 are arranged in opposite directions, when the reduction motor 61 is rotating in the forward direction, power can only be transmitted through the corresponding ratchet mechanism 63, transmitting power along the mounting shaft 631, the pawl 633, and the inner ratchet 632 in sequence to the transmission roller 21, thereby driving the feed assembly 2 to operate stably. In the other ratchet mechanism 63, the operating pawl 633 and the ratchet teeth inside the inner ratchet 632 are in a slipping state, and power transmission is not possible. When the reduction motor 61 rotates in the reverse direction, the power transmission mode is switched, driving the diversion transmission mechanism 62 to operate while the feed assembly 2 is stopped.

[0057] In order to ensure that the diversion transmission mechanism 62 can stably receive the power transmitted by the corresponding ratchet mechanism 63 and drive the lifting assembly 3 and the cloth assembly 4 to operate independently, the following technical solutions are provided: The diversion transmission mechanism 62 includes a spline shaft 621, a telescopic cylinder A622, a locking groove A623, a locking groove B624, and a locking joint A625 and a locking joint B626 that are coaxially fixed and respectively nested and locked with the locking groove A623 and the locking groove B624. The spline shaft 621 is rotatably installed on the mounting frame 1 and is coaxially fixed with the inner ratchet 632 in one set of ratchet mechanisms 63. The spline shaft 621 passes through the axial arrangement of the locking groove A623 and the locking groove B624. The locking joints A625 and B626 are respectively locked. They are arranged symmetrically and are both slidably connected with the spline shaft 621. The telescopic cylinder A622 is fixedly installed on the mounting frame 1, and the movable end of the telescopic cylinder A622 is fixedly connected with the connecting piece 6221. The locking joint A625 and the locking joint B626 are rotatably installed on the connecting piece 6221. The locking groove A623 and the locking groove B624 are both rotatably installed on the mounting frame 1. The driving bevel gear B6231 is coaxially fixed on the locking groove A623, and the driving shaft 33 is fixed with a transmission bevel gear B332 that is meshed with the driving bevel gear B6231.

[0058] During the telescopic movement of the telescopic cylinder A622, the locking joint A625 and the locking joint B626 can be driven to run stably along the axis of the spline shaft 621 through the connecting piece 6221, and the setting of the connecting piece 6221 can not affect the normal operation of the locking joint A625 and the locking joint B626.

[0059] When the locking joint A625 and the locking groove A623 are nested and locked to realize power transmission, the locking joint B626 and the locking groove B624 are automatically separated and the power transmission is cut off. At this time, the power of the corresponding ratchet mechanism 63 can be transmitted to the locking joint A625 through the spline shaft 621, and then the driving shaft 33 is driven to operate stably through the combination of the locking groove A623 and the driving bevel gear B6231 and the transmission bevel gear B332, thereby stably transmitting the power to the lifting component 3.

[0060] On the contrary, when the locking joint B626 and the locking groove B624 are nested and combined, the power of the corresponding mechanism can be stably transmitted through the spline shaft 621, the locking joint B626, and the locking groove B624 in sequence, thereby driving the cloth assembly 4 to operate stably.

[0061] The sliding combination of the spline shaft 621 and the locking joints A625 and B626 can ensure that power can be stably transmitted to them through the spline shaft 621 without affecting the posture adjustment of the locking joints A625 and B626.

[0062] Example 4 See also Figure 7-Figure 8 In order to ensure that the material distribution assembly 4 can be stably installed on the mounting frame 1, realize the power connection between the shunt transmission mechanism 62 and the material distribution assembly 4, and ensure that the various components in the material distribution assembly 4 can achieve coordinated operation, the following technical solutions for the material distribution assembly 4 are provided: The rotating bracket 41 is rotatably mounted on the mounting frame 1 , a transmission bevel gear C411 is fixedly connected to the axis of the rotating bracket 41 , and a driving bevel gear C6241 meshing with the transmission bevel gear C411 is fixedly connected to the axis of the locking groove B624 .

[0063] The pressing mechanism 42 includes a telescopic cylinder B421 and a guide rod B422. The telescopic cylinder B421 is fixedly installed on the rotating bracket 41 and arranged in the vertical direction. The movable end of the telescopic cylinder B421 is fixedly connected to the assembly fixture 43. The guide rod B422 is fixedly installed on the assembly fixture 43 and arranged in the vertical direction. The guide rod B422 maintains a sliding connection with the rotating bracket 41.

[0064] The combination of the driving bevel gear C6241 and the transmission bevel gear C411 can ensure that the power of the shunt transmission mechanism 62 is stably transmitted to the rotating bracket 41, and drive the rotating bracket 41 to operate continuously and stably, so that the various groups of assembly fixtures 43 and the matching pressing mechanism 42 provided thereon can be respectively arranged corresponding to the battery package 71 positioned at the lifting assembly 3.

[0065] The assembly fixture 43 and the pressing mechanism 42 each have three groups, which are used to position and press-fit the insulating pad 72, the cell protection plate 73, and the protective cover 74. The corresponding assembly fixture 43 is raised and lowered by controlling the telescopic movement of the telescopic cylinder B421 and guided by the guide rod B422.

[0066] In order to ensure that the insulating pad 72, the battery protection plate 73, and the protective cover 74 to be assembled are stably assembled to the corresponding assembly fixture 43 of the fabric component 4 to ensure the assembly efficiency of the lithium battery, the following technical solutions are provided: It also includes a robotic arm 8 fixedly mounted on the mounting frame 1 , on which a transfer fixture 81 is mounted. The insulating pad 72 , the battery cell protection plate 73 , and the protective cover 74 can be clamped and transferred by the assembly fixture 43 and the transfer fixture 81 .

[0067] The robotic arm 8 adopts a six-axis structure and can adjust its posture in six dimensions. With the help of the transfer fixture 81 installed on it, the insulating pad 72, the battery cell protection plate 73, and the protective cover 74 are clamped and transferred to the assembly fixture 43 directly above the lifting component 3, thereby realizing the transfer of the corresponding accessories to the fabric component 4 to improve the assembly efficiency of the lithium battery.

[0068] The clamps on the transfer fixture 81 and the assembly fixture 43 are staggered to avoid spatial collision of the clamps when the insulating pad 72, the battery protection plate 73, and the protective cover 74 are transferred between the two.

[0069] Example 5 See also Figure 13-14 In order to ensure that the welding assembly 5 can be stably assembled on the mounting frame 1 and to achieve stable welding of the cell protection plate 73 with the help of the welding assembly 5, the following technical solutions are provided: The welding assembly 5 includes an assembly bracket 51, a sliding bracket 52, a welding gun 53, an adjusting screw 54, and a driving motor 55. The assembly bracket 51 is fixedly mounted on the mounting frame 1. A horizontally arranged guide rod C511 is fixedly connected to the assembly bracket 51. The sliding bracket 52 includes two groups slidably mounted on the guide rod C511. The two groups of sliding brackets 52 are fixedly connected to a welding gun 53 that maintains a horizontal arrangement. Both ends of each group of sliding brackets 52 are screwed with an adjusting screw 54. Each group of adjusting screws 54 is rotatably mounted on the assembly bracket 51. Each group of adjusting screws 54 is rotatably mounted on the assembly bracket 51. 4 are fixedly connected to the ends of the two sets of adjusting screws 54 on the same sliding bracket 52. The synchronous wheels B541 are provided on the two sets of adjusting screws 54 on the same sliding bracket 52 to achieve power connection through a synchronous belt. One set of adjusting screws 54 matched with the two sets of sliding brackets 52 is coaxially fixedly connected through a connecting shaft 542. The driving motor 55 is fixedly mounted on the assembly bracket 51, and the output shaft of the driving motor 55 is fixedly connected to the driving bevel gear D551. The end of one set of adjusting screws 54 is fixedly connected to the transmission bevel gear D543 that is meshed with the driving bevel gear D551.

[0070] The setting of the assembly bracket 51 can ensure the stable assembly of the remaining components in the welding assembly 5. The sliding bracket 52 cooperates with the guide rod C511 to ensure that the sliding bracket 52 is stably installed in a relative sliding manner. When the drive motor 55 is running, the corresponding adjustment screw 54 can be driven to operate stably through the combination of the driving bevel gear D551 and the transmission bevel gear D543, and then the two groups of sliding brackets 52 are driven to always maintain symmetrical movement through the combination of the connecting shaft 542 and the synchronous wheel B541 and the synchronous belt, thereby ensuring that the two groups of welding guns 53 are moved closer to or away from each other.

[0071] When the two groups of welding guns 53 are close to each other, the welding guns 53 and the electrode lugs 731 can be pressed tightly and positioned on the electrode head 712 on the corresponding side. The welding guns 53 heat and melt the electrode lugs 731 and fix them to the electrode head 712, thereby realizing the welding combination of the battery cell protection plate 73 and the electrode head 712.

[0072] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0073] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A lithium battery cell protection plate welding device, characterized in that: It comprises a mounting frame (1) and a feeding assembly (2), a lifting assembly (3), a material distribution assembly (4), a welding assembly (5) and a driving assembly (6) assembled on the mounting frame (1); The feeding assembly (2) is arranged on the mounting frame (1) in a horizontal direction and is used to transport lithium batteries, and the lifting assembly (3) is arranged in the gap of the feeding assembly (2) and is used to drive the lithium batteries to move upward and downward; The cloth assembly (4) includes a rotating bracket (41) and a plurality of pressing mechanisms (42) and assembly fixtures (43) assembled on the rotating bracket (41) and distributed in a ring array. The rotating bracket (41) rotates around a vertical axis. The pressing mechanism (42) is connected to the assembly fixture (43) by power and drives the assembly fixture (43) to move up and down on the rotating bracket (41). When the assembly fixture (43) moves with the rotating bracket (41), a group of assembly fixtures (43) is located directly above the lifting assembly (3). The welding assembly (5) is arranged between the assembly fixture (43) and the lifting assembly (3). The driving assembly (6) comprises a reduction motor (61), a diversion transmission mechanism (62), and two sets of ratchet mechanisms (63) arranged in opposite directions. The reduction motor (61) maintains a power connection with the two sets of ratchet mechanisms (63), one set of the ratchet mechanisms (63) maintains a power connection with the feeding assembly (2), and the other set of the ratchet mechanisms (63) maintains a power connection with the lifting assembly (3) and the cloth assembly (4) through the diversion transmission mechanism (62).

2. The lithium battery cell protection plate welding device according to claim 1, characterized in that: The lithium battery comprises a battery package (71), an insulating pad (72), a battery cell protection plate (73), and a protective cover (74). An assembly pad (711) is provided on the top of the battery package (71), and electrode heads (712) are led out from both sides of the assembly pad (711). The insulating pad (72) is bonded to the assembly pad (711), and the battery cell protection plate (73) is bonded to the insulating pad (72). Electrode ears (731) electrically connected to the electrode heads (712) are led out from the battery cell protection plate (73). The protective cover (74) is bonded to the battery package (71) and arranged on the periphery of the assembly pad (711). The top inner wall of the protective cover (74) is in contact with the battery cell protection plate (73).

3. The lithium battery cell protection plate welding device according to claim 2, characterized in that: The feeding assembly (2) comprises a plurality of groups of transmission rollers (21) rotatably mounted on the mounting frame (1) and uniformly arranged along the same horizontal direction, wherein a transmission sprocket A (22) is fixedly connected to the same end of each group of transmission rollers (21), and the transmission sprockets A (22) arranged on two adjacent groups of transmission rollers (21) realize chain transmission through a chain, and the battery package (71) to be transmitted is arranged on the transmission rollers (21).

4. The lithium battery cell protection plate welding device according to claim 3, characterized in that: The lifting assembly (3) includes two groups of symmetrically arranged positioning seats (31) and a reciprocating screw (32) that is rotationally connected to the positioning seats (31); the positioning seats (31) are arranged in the gap between two adjacent groups of the transmission rollers (21); the positioning seats (31) are provided with positioning grooves (311) that are nested and matched with the battery package (71); both sides of the positioning seats (31) are fixedly connected with connecting wing seats (312); each group of the connecting wing seats (312) is rotationally connected to a group of the reciprocating screws (32) arranged in the vertical direction; The lifting assembly (3) further comprises a driving shaft (33) rotatably mounted on the mounting frame (1) and arranged in a horizontal direction, the bottom end of each set of reciprocating screws (32) is fixedly connected to a synchronous wheel A (321), and the synchronous wheel A (321) corresponding to the same positioning seat (31) is connected to the power through a synchronous belt, and the top ends of the two sets of reciprocating screws (32) arranged on the same side of the mounting frame (1) are fixedly connected to a transmission bevel gear A (322), and two sets of driving bevel gears A (331) are fixedly connected to the driving shaft (33), and the two sets of driving bevel gears A (331) are respectively engaged with the two sets of transmission bevel gears A (322).

5. The lithium battery cell protection plate welding device according to claim 4, characterized in that: The ratchet mechanism (63) comprises a mounting shaft (631), an inner ratchet (632), and a pawl (633). The mounting shaft (631) is arranged at the axis of the inner ratchet (632). The pawl (633) is rotatably mounted on the periphery of the mounting shaft (631) and is kept in mesh with the inner ratchet (632). The mounting shaft (631) is also equipped with a spring (634) that is kept in contact with the pawl (633). A transmission sprocket B (635) is fixedly connected to the mounting shaft (631). The transmission sprockets B (635) in the two groups of ratchet mechanisms (63) are chain-driven by a chain. The output shaft of the reduction motor (61) is coaxially fixedly connected to the mounting shaft (631) in one group of ratchet mechanisms (63). The inner ratchet (632) in one set of ratchet mechanisms (63) is coaxially fixedly connected to one set of transmission rollers (21) in the feeding assembly (2), and the inner ratchet (632) in the other set of ratchet mechanisms (63) is dynamically connected to the diversion transmission mechanism (62).

6. The lithium battery cell protection plate welding device according to claim 5, characterized in that: The diversion transmission mechanism (62) comprises a spline shaft (621), a telescopic cylinder A (622), a locking groove A (623), a locking groove B (624), and a locking joint A (625) and a locking joint B (626) which are coaxially fixed and respectively nested and locked with the locking groove A (623) and the locking groove B (624). The spline shaft (621) is rotatably mounted on the mounting frame (1) and coaxially fixed with the inner ratchet (632) in one group of the ratchet mechanisms (63). The spline shaft (621) passes through the axial arrangement of the locking groove A (623) and the locking groove B (624). The locking joint A (625) and the locking joint B (626) are respectively nested and locked with the locking groove A (623) and the locking groove B (624). The telescopic cylinder A (622) is fixedly mounted on the mounting frame (1), and the movable end of the telescopic cylinder A (622) is fixedly connected to a connecting piece (6221). The locking joint A (625) and the locking joint B (626) are rotatably mounted on the connecting piece (6221). The locking groove A (623) and the locking groove B (624) are both rotatably mounted on the mounting frame (1). A driving bevel gear B (6231) is coaxially fixedly connected to the locking groove A (623). A transmission bevel gear B (332) meshing with the driving bevel gear B (6231) is fixedly connected to the driving shaft (33).

7. The lithium battery cell protection plate welding device according to claim 6, characterized in that: The rotating bracket (41) is rotatably mounted on the mounting frame (1), a transmission bevel gear C (411) is fixedly connected to the axis of the rotating bracket (41), and a driving bevel gear C (6241) that is meshed with the transmission bevel gear C (411) is fixedly connected to the axis of the locking groove B (624); The pressing mechanism (42) comprises a telescopic cylinder B (421) and a guide rod B (422). The telescopic cylinder B (421) is fixedly mounted on the rotating bracket (41) and arranged in a vertical direction. The movable end of the telescopic cylinder B (421) is fixedly connected to the assembly fixture (43). The guide rod B (422) is fixedly mounted on the assembly fixture (43) and arranged in a vertical direction. The guide rod B (422) maintains a sliding connection with the rotating bracket (41).

8. The lithium battery cell protection plate welding device according to claim 7, characterized in that: It also includes a mechanical arm (8) fixedly mounted on the mounting frame (1), the mechanical arm (8) being equipped with a transfer fixture (81), and the insulating pad (72), the battery cell protection plate (73), and the protective cover (74) can be clamped and transferred by the assembly fixture (43) and the transfer fixture (81).

9. The lithium battery cell protection plate welding device according to claim 8, characterized in that: The welding assembly (5) includes an assembly bracket (51), a sliding bracket (52), a welding gun (53), an adjusting screw (54), and a driving motor (55). The assembly bracket (51) is fixedly mounted on the mounting frame (1). A horizontally arranged guide rod C (511) is fixedly connected to the assembly bracket (51). The sliding bracket (52) includes two groups slidably mounted on the guide rod C (511). The two groups of sliding brackets (52) are fixedly connected to a welding gun (53) that is kept horizontally arranged. Both ends of each group of sliding brackets (52) are screwed to the adjusting screw (54). Each group of adjusting screws (54) is rotatably mounted on the assembly bracket (51). 1), the end of each group of adjusting screws (54) is fixedly connected with a synchronous wheel B (541), the synchronous wheels B (541) provided on the two groups of adjusting screws (54) matched on the same sliding bracket (52) are connected to each other by a synchronous belt, and one group of adjusting screws (54) matched with the two groups of sliding brackets (52) is coaxially fixedly connected by a connecting shaft (542), the driving motor (55) is fixedly mounted on the assembly bracket (51), and the output shaft of the driving motor (55) is fixedly connected with a driving bevel gear D (551), and the end of one group of the adjusting screws (54) is fixedly connected with a transmission bevel gear D (543) that is meshed with the driving bevel gear D (551).

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