Collector plate battery cell welding jig and collector plate battery cell welding device

Abstract

The utility model relates to a collector plate battery cell welding jig and a collector plate battery cell welding device. The utility model comprises a rack which extends along the vertical direction; the collector plate adsorption unit is mounted at the uppermost part of the rack, can move up and down along the rack, and comprises a sucker suction nozzle; the battery cell fixing unit comprises two clamping jaw fingers which are positioned below the collector plate adsorption unit and can be separated or close to each other along the horizontal direction; the rotary jacking unit comprises a supporting cup jacking rod which is positioned below the battery cell fixing unit and moves up and down along the rack; the suction center of the suction cup suction nozzle, the clamping center of the clamping jaw fingers and the axis of the cup supporting ejector rod are located on the same axis, and the same axis extends in the vertical direction. According to the welding jig for the current collecting plate and the battery cell, the coaxial precision of the current collecting plate and the battery cell is high during welding, so that the performance and the safety of a battery product are improved.

Description

Technical Field

[0001] The utility model relates to the field of battery manufacturing equipment, in particular to a current collector plate cell welding fixture and a current collector plate cell welding device. Background Technique

[0002] The development of new energy to replace petroleum products has been increasingly emphasized by governments of various countries. In the field of vehicles, pure electric and hybrid vehicles will become an inevitable trend in the future development of the automotive industry. In the new energy electric vehicle and hybrid vehicle systems, the power battery system is an essential and important part. In a power battery, the current collector plate is an important component, which is mainly used for the positive or negative electrode of the battery and plays the role of current collection and conduction. In the process of manufacturing the battery of a new energy vehicle, it is necessary to fixedly weld the current collector plate and the cell.

[0003] The current collector plate generally includes a disk ladder or a raised portion. Therefore, in the process of welding the current collector plate and the cell together, it is necessary to strictly align and abut the current collector plate and the cell. Currently, in the industry, a relatively simple welding fixture is usually used for alignment processing, but the batteries produced by this simple welding fixture usually have quality problems such as low charge and discharge efficiency and thermal runaway. Content of the Utility Model

[0004] Based on this, the purpose of the present utility model is to provide a current collector plate cell welding fixture and a current collector plate cell welding device.

[0005] A current collector plate cell welding fixture includes: a frame extending in the vertical direction; a current collector plate adsorption unit installed at the uppermost part of the frame and capable of moving up and down along the frame, including a suction cup nozzle; a cell fixing unit including two jaw fingers located below the current collector plate adsorption unit and capable of separating or approaching in the horizontal direction; a rotating lifting unit including a cup ejector rod moving up and down along the frame below the cell fixing unit.

[0006] The adsorption center of the suction cup nozzle, the clamping center of the jaw fingers, and the axis of the cup ejector rod are on the same axis, and the same axis extends in the vertical direction.

[0007] For the current collector plate cell welding fixture of the present utility model, the coaxial accuracy of the current collector plate and the cell during welding is high, thereby improving the performance and safety of the battery product.

[0008] Furthermore, the current collector plate adsorption unit further includes:

[0009] The moving component includes a first linear guide rail, a first slider seat, a suction cup mounting seat and a first spring; the first linear guide rail is fixedly arranged on the frame and extends in the vertical direction; the first slider seat and the suction cup mounting seat are slidably mounted on the first linear guide rail from top to bottom in sequence; the first spring is connected between the first slider seat and the suction cup mounting seat;

[0010] The suction cup component includes a fixing plate, and the fixing plate is fixedly arranged on the suction cup mounting seat; the suction cup nozzle is fixedly mounted on the fixing plate, and its opening faces downward;

[0011] The manifold cup bracket is located below the suction cup component and includes a horizontal end fixed on the frame. An arc-shaped mounting groove for accommodating the manifold cup is formed on the side of the horizontal end facing the suction cup nozzle, and the center of the arc-shaped mounting groove is located on the same axis.

[0012] Through the above technical solutions, the accurate positioning and adsorption fixation of the manifold are realized.

[0013] Further, the battery cell fixing unit includes:

[0014] The clamping component includes a second linear guide rail, a third linear guide rail, clamping jaw fingers, a first slider, a second slider, a second spring and two third springs; the second linear guide rail is fixedly arranged on the frame and extends in the horizontal direction; the first slider and the second slider are slidably arranged on the second linear guide rail, and third linear guide rails extending in the vertical direction are respectively arranged on one side of the first slider and the second slider facing away from the second linear guide rail; the clamping jaw fingers are slidably arranged on each third linear guide rail; the second spring is connected between the first slider and the second slider, and the two third springs are respectively connected between the first slider and the clamping jaw finger located on the first slider, and between the second slider and the clamping jaw finger located on the second slider;

[0015] The driving component includes a connecting block and a swing rod rotating shaft. The swing rod rotating shaft passes through the frame and extends towards the clamping component, and a guiding groove is formed on the end face of the end of the swing rod rotating shaft close to the clamping component; the first slider and the second slider are respectively provided with a first swing rod and a second swing rod at the ends close to the swing rod rotating shaft, and the first swing rod and the second swing rod are slidably inserted into the guiding groove; the connecting block is located at the end of the swing rod rotating shaft away from the clamping component;

[0016] The cell cup bracket is located below the clamping assembly and includes a support plate and a limit block fixed on the frame. The support plate is provided with a first through hole whose axis extends in the vertical direction, and the first through hole penetrates the support plate. The limit block is located above the support plate and is provided with a limit groove for fixing the cell cup, and the center of the limit groove is located on the same axis.

[0017] Through the above technical solutions, the precise positioning and fixing of the cell are realized, and at the same time, the coaxial accuracy of the cell and the current collector plate is ensured.

[0018] Further, the rotation and lifting unit includes:

[0019] A lifting main body, including a fourth linear guide rail, a second slider seat, a cell ejector rod and a cup ejector rod. The fourth linear guide rail is fixed on the frame and extends in the vertical direction. The second slider seat is slidably arranged on the fourth linear guide rail. The cup ejector rod extends out of the second slider seat and extends towards the cell cup bracket, and the cup ejector rod can pass through the first through hole. The cell ejector rod is inserted into the cup ejector rod, and one end close to the cell cup bracket is located outside the cup ejector rod.

[0020] A pressing assembly, including a third slider seat, a fourth spring and a pressing plate. The pressing plate is fixed at one end of the cell ejector rod far from the cell cup bracket. The third slider seat can move in the vertical direction and is connected to the side of the pressing plate far from the cell ejector rod through the fourth spring.

[0021] Through the above technical solutions, the pressing and fitting of the current collector plate and the cell during welding are realized.

[0022] Further, the rotation and lifting unit further includes:

[0023] A rotation assembly, including a servo motor, a first gear and a second gear. The first gear is sleeved on one end of the cup ejector rod axially far from the clamping assembly. The second gear is meshed and connected with the first gear, and the output shaft of the servo motor is connected with the second gear.

[0024] Through the above technical solutions, the alignment of the welding angle of the current collector plate and the cell is realized, meeting the requirements of special processes.

[0025] A current collector plate and cell welding device includes: the above-mentioned current collector plate and cell welding jig, a base and a laser welding machine. The laser welding machine is fixedly installed on the base.

[0026] The current collector plate and cell welding jig is installed on the base and can be moved relative to the base to the laser welding machine for welding operations.

[0027] Further, a first cam groove, a second cam groove, a third cam groove, a fourth cam groove, and a fifth cam groove are formed in the base; the first cam groove, the second cam groove, the third cam groove, the fourth cam groove, and the fifth cam groove respectively include a rising section, a falling section, and a horizontal section;

[0028] The current collector plate cell welding jig further includes a first cam follower, a second cam follower, a third cam follower, a fourth cam follower, and a fifth cam follower; one ends of the first cam follower and the second cam follower are respectively connected to the first slider seat and the suction cup mounting seat, and the other ends are respectively disposed in the first cam groove and the second cam groove; one end of the third cam follower is disposed on the connecting block, and the other end is disposed in the third cam groove; one ends of the fourth cam follower and the fifth cam follower are respectively connected to the second slider seat and the third slider seat, and the other ends are respectively disposed in the fourth cam groove and the fifth cam groove;

[0029] The first cam follower, the second cam follower, the third cam follower, the fourth cam follower, and the fifth cam follower respectively move up and down along the first cam groove, the second cam groove, the third cam groove, the fourth cam groove, and the fifth cam groove, and respectively move up and down along different rising sections, falling sections, and horizontal sections provided according to process requirements.

[0030] Through the above technical solution, the movement of the corresponding device is driven by the movement of the cam follower in the corresponding cam groove, simplifying the control logic.

[0031] Further, the current collector plate cell welding device further includes a current collector plate support cup, and a current collector plate mounting groove is provided at the top thereof. Through the above technical solution, accurate positioning during the feeding of the current collector plate is achieved.

[0032] Further, a cell support cup is further included. The cell support cup is provided with a cup inner hole whose axis extends in the vertical direction, and the cell passes through the cup inner hole. Through the above technical solution, accurate positioning during the feeding of the cell is achieved.

[0033] Further, a welding trigger rod and a welding station sensor are further included. The welding trigger rod moves along with the current collector plate cell welding jig; the welding station sensor is fixedly provided on the base and is close to the laser welding machine. Through the above technical solution, the welding process is triggered by the signal change of the welding station sensor, simplifying the control logic.

[0034] The current collector plate cell welding jig and the current collector plate cell welding device provided by the present utility model have the following advantages:

[0035] (1) Through the action of the cam followers of each mechanism and the corresponding cam grooves when the welding fixture moves along the advancing direction, processes such as the adsorption of the current collector plate, the clamping of the battery cell, the jacking of the battery cell, and the pressing of the current collector plate against the battery cell are completed, and the control logic is simple and convenient.

[0036] (2) The centers of the suction nozzles of the suction cups of the welding fixture for the current collector plate and the battery cell, the centers of the arcs of the arc-shaped mounting grooves, the clamping centers of the clamping jaws, the centers of the second through holes, the centers of the limiting grooves, and the axes of the cup lifting rods are coaxial, ensuring the coaxial accuracy of the battery cell and the current collector plate during welding.

[0037] (3) When welding, the upper edge of the second cam groove is used as the position reference for the current collector plate, the welding position is fixed, and the welding accuracy is high.

[0038] (4) A rotating assembly is provided, which can achieve the alignment of the battery cell angle and meet the process requirements for certain welding angles between the battery cell and the current collector plate.

[0039] (5) A clamping jaw mechanism is provided. When the battery cell is jacked up, the clamping jaw mechanism can clamp the battery cell to achieve secondary positioning and prevent the battery cell from deflecting during the jacking process.

[0040] (6) The adsorption assembly is provided with a dust suction port and a nitrogen interface. During welding, the generated welding fumes can be sucked away in time and nitrogen can be blown to prevent oxidation, improving the welding effect. Description of the Drawings

[0041] Figure 1 It is a schematic diagram of the overall structure of the current collector plate and battery cell welding fixture in the present invention;

[0042] Figure 2 It is the front view of the current collector plate and battery cell welding fixture in the present invention;

[0043] Figure 3 It is a schematic diagram of the overall structure of the current collector plate adsorption unit in the present invention;

[0044] Figure 4 It is the front view of the current collector plate adsorption unit in the present invention;

[0045] Figure 5 It is a schematic diagram of the overall structure of the battery cell fixing unit in the present invention;

[0046] Figure 6 It is the front view of the battery cell fixing unit in the present invention;

[0047] Figure 7 It is a schematic diagram of the overall structure of the rotation and jacking unit in the present invention;

[0048] Figure 8 It is the front view of the rotation and jacking unit in the present invention;

[0049] Figure 9 This is a schematic diagram of the overall structure of the current collector tray cup in the present utility model;

[0050] Figure 10 This is a schematic diagram of the structure of the second cam groove in the present utility model.

[0051] In the figure, 1 is the frame; 10 is the second cam groove; 101 is the rising section; 102 is the falling section; 103 is the horizontal section; 2 is the current collector adsorption unit; 21 is the moving component; 210 is the first linear guide; 211 is the first slider seat; 212 is the suction cup mounting seat; 213 is the first spring; 214 is the first cam follower; 215 is the second cam follower; 22 is the suction cup assembly; 220 is the fixing plate; 221 is the suction cup nozzle; 222 is the vacuum cleaner; 223 is the nitrogen supplier; 23 is the current collector tray cup bracket; 231 is the horizontal end; 2311 is the arc-shaped mounting groove; 232 is the vertical end; 3 is the battery cell fixing unit; 31 is the clamping component; 310 is the second linear guide; 311 is the third linear guide; 312 is the jaw finger; 313 is the first slider; 3131 is the first swing rod; 314 is the second slider; 3141 is the second swing rod; 315 is the second spring; 316 is the third spring; 32 is the driving component; 321 is the connecting block; 322 is the swing rod rotating shaft; 3221 is the guiding groove; 323 is the third cam follower; 33 is the battery cell tray cup bracket; 331 is the support plate; 3311 is the first through hole; 332 is the limiting block; 3321 is the horizontal part; 3322 is the vertical part; 3323 is the limiting groove; 4 is the rotary lifting mechanism; 42 is the lifting main body; 420 is the fourth linear guide, 421 is the second slider seat; 422 is the battery cell ejector rod; 423 is the tray cup ejector rod; 424 is the fourth cam follower; 425 is the second through hole; 43 is the rotating component; 431 is the servo motor; 432 is the motor mounting seat; 433 is the first gear; 434 is the second gear; 435 is the coupling; 44 is the pressing component; 441 is the third slider seat; 442 is the fourth spring; 443 is the pressing plate; 444 is the fifth cam follower; 5 is the current collector; 50 is the current collector tray cup; 501 is the limiting protrusion; 502 is the current collector mounting groove; 6 is the battery cell; 60 is the battery cell tray cup; 601 is the inner hole of the tray cup. Specific embodiments

[0052] In the research on battery quality problems by the applicant, it is found that: the reasons for the low charge and discharge efficiency and thermal runaway of the battery are that the coaxial accuracy during the welding of the current collector and the battery cell of the battery is not high, resulting in an increase in the internal resistance of the battery and affecting the charge and discharge efficiency. At the same time, it will also cause an excessive local current density in the battery, generating too much heat and thermal runaway. In response to this, the applicant provides a current collector and battery cell welding jig for improving the coaxial accuracy during the welding of the current collector and the battery cell.

[0053] The following will further describe the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but not to limit the scope of the present utility model.

[0054] Please refer to Figures 1-10 , Figure 1 which is the overall structural schematic diagram of the current collector plate cell welding jig in the present utility model; Figure 2 which is the front view of the current collector plate cell welding jig in the present utility model; Figure 3 which is the overall structural schematic diagram of the current collector plate adsorption unit in the present utility model; Figure 4 which is the front view of the current collector plate adsorption unit in the present utility model; Figure 5 which is the overall structural schematic diagram of the cell fixing unit in the present utility model; Figure 6 which is the front view of the cell fixing unit in the present utility model; Figure 7 which is the overall structural schematic diagram of the rotary lifting unit in the present utility model; Figure 8 which is the front view of the rotary lifting unit in the present utility model; Figure 9 which is the overall structural schematic diagram of the current collector plate supporting cup in the present utility model; Figure 10 which is the structural schematic diagram of the second cam groove in the present utility model.

[0055] The present utility model provides a current collector plate cell welding device, including a base, and a current collector plate cell welding jig, a welding trigger rod 7, a laser welding machine (not shown in the figure), and a welding station sensor (not shown in the figure) fixedly installed on the base. The position of the welding station sensor corresponds to that of the laser welding machine. The current collector plate cell welding jig can move on the base, and the welding trigger rod 7 protrudes from the bottom of the current collector plate cell welding jig and moves therewith. When the welding trigger rod 7 enters the sensing range of the welding station sensor, a trigger signal is output to start the welding process of the laser welding machine.

[0056] The current collector plate cell welding jig is used to clamp the current collector plate 5 and the cell 6 during the current collector plate welding process in battery manufacturing and ensure the welding positioning accuracy, and includes a frame 1, a current collector plate adsorption unit 2, a cell fixing unit 3, and a rotary lifting unit 4.

[0057] Among them, as Figure 1 shown, the frame 1 is used to carry the current collector plate adsorption unit 2, the cell fixing unit 3, and the rotary lifting unit 4. In this embodiment, the frame 1 is a plate member extending in the vertical direction, and the current collector plate adsorption unit 2, the cell fixing unit 3, and the rotary lifting unit 4 are located on the same side plate surface of the frame 1.

[0058] Please refer to Figures 1 to 4, the current collector tray adsorption unit 2 is installed above the frame 1 and includes a motion assembly 21, a suction cup assembly 22, and a current collector tray support bracket 23. The motion assembly 21 is installed on the frame 1, the suction cup assembly 22 is fixedly installed on the motion assembly 21, the motion assembly 21 can drive the suction cup assembly 22 to move along the extension direction of the frame 1, the suction cup assembly 22 is used to adsorb and fix the current collector tray 5, and the current collector tray support bracket 23 is installed on the frame 1 and is located below the suction cup assembly 24 for carrying the current collector tray cup 50.

[0059] The motion assembly 21 includes a first linear guide 210, a first slider seat 211, a suction cup mounting seat 212, and a first spring 213. Specifically, the first linear guide 210 is fixedly installed on the frame 1 by screws, and its extension direction is parallel to the extension direction of the frame 1, serving as a guiding function. The first slider seat 211 and the suction cup mounting seat 212 are slidably installed on the first linear guide 210, a first spring 213 is connected between the first slider seat 211 and the suction cup mounting seat 212, and the first slider seat 211 is located above the suction cup mounting seat 212. The first slider seat 211 and the suction cup mounting seat 212 can slide along the first linear guide 210 respectively driven by motors, pumps, etc. in the prior art.

[0060] Furthermore, the motion assembly 21 further includes a first cam follower 214 and a second cam follower 215, which are respectively arranged on the sides of the first slider seat 211 and the suction cup mounting seat 212 facing away from the frame 1. A first cam groove (not shown in the figure) and a second cam groove 10 are formed on the base. The first cam follower 214 is arranged in the first cam groove (not shown in the figure), the second cam follower 215 is arranged in the second cam groove 10, and when the first cam follower 214 and the second cam follower 215 move along the corresponding cam grooves in the advancing direction respectively, they drive the first slider seat 211 and the suction cup mounting seat 212 to move up and down along the extension direction of the first linear guide 210 respectively. The first cam follower 214 and the second cam follower 215 can be bumps, etc. in the prior art, and can roll forward along the first cam groove (not shown in the figure) and the second cam groove 10, and their axes are perpendicular to the plate surface of the frame.

[0061] The suction cup assembly 22 includes a fixing plate 220 and a suction cup nozzle 221. Specifically, the fixing plate 220 is fixedly installed on the suction cup mounting seat 212, the suction cup nozzle 221 is fixedly installed on the side of the fixing plate 220 away from the suction cup mounting seat 212, its opening faces the current collector tray support bracket 23 below, and one end of the suction cup nozzle 221 is externally connected to a vacuum pump (not shown in the figure), so that negative pressure is formed on the suction cup nozzle 221, thereby adsorbing and fixing the current collector tray 5 located below it.

[0062] The manifold cup carrier bracket 23 includes a horizontal end 231 and a vertical end 232. The vertical end 232 is fixedly installed on the frame 1 by screws, and the horizontal end 231 is integrally connected to the vertical end 232. An arc-shaped mounting groove 2311 with a radius slightly larger than that of the manifold cup 50 is provided on the side of the horizontal end 231 opposite to the suction cup nozzle 221, and its axis is parallel to the extending direction of the frame 1. During welding, the manifold cup 50 loaded with the manifold 5 enters the arc-shaped mounting groove 2311, thereby being limited and fixed.

[0063] Preferably, two sets of the first springs 213 are provided, which can reduce the shaking or offset caused by uneven force on a single spring, thereby enhancing stability.

[0064] Preferably, to ensure the welding effect, the suction cup assembly 22 further includes a vacuum cleaner 222 and a nitrogen supply device 223 fixedly installed on the fixing plate 220. One end of the vacuum cleaner 222 is connected to an external vacuum cleaner (not shown in the figure). During welding, the dust generated on the surface of the manifold 5 is timely sucked away, achieving a purification effect and also avoiding the influence of dust on laser refraction. One end of the nitrogen supply device 223 is connected to a nitrogen source (not shown in the figure). During welding, nitrogen is blown to the welding position of the manifold 5 to prevent oxidation.

[0065] During operation, the manifold cup 50 loaded with the manifold 5 enters the welding jig through the feeding belt and is fixed on the manifold cup carrier bracket 23. The suction cup mounting seat 212 moves downward, causing the suction cup nozzle 221 to approach the manifold cup 50. At the same time, the first slider seat 211 moves downward, causing the first spring 213 to be compressed. The pressure drives the suction cup mounting seat 212 to continue to press down, pressing the suction cup nozzle 221 into the manifold cup 50, thereby adsorbing the manifold 5. In addition, the compression amount of the first spring 213 can be controlled by controlling the downward movement distance of the first slider seat 211 to adapt to the adsorption position, thereby avoiding overpressure when the suction cup nozzle 221 adsorbs the manifold 5 and causing damage to the suction cup nozzle 221 or the manifold cup 50.

[0066] Please refer to Figure 1 、 Figure 5 and Figure 6 As shown in, the cell fixing unit 3 is installed in the middle of the frame 1, below the manifold adsorption unit 2, and includes a clamping assembly 31, a driving assembly 32, and a cell cup carrier bracket 33. Among them, the clamping assembly 31 is fixedly installed on the frame 1 by screws and is used for clamping and fixing the cell 6. The driving assembly 32 is fixedly installed on the frame 1 through shaft-hole cooperation and is used for driving the clamping assembly 31 to clamp or loosen. The cell cup carrier bracket 33 is fixedly installed on the frame 1 below the clamping assembly 31 and is used for carrying the cell cup 60.

[0067] The clamping assembly 31 includes a second linear guide 310, a third linear guide 311, jaw fingers 312, a first slider 313, and a second slider 314. Specifically, the second linear guide 310 is fixedly installed on the frame 1 by screws, and its extending direction is perpendicular to the extending direction of the frame 1, serving as a guiding function. The first slider 313 and the second slider 314 are slidably arranged on the second linear guide 310. On the plate surfaces of the first slider 313 and the second slider 314 away from the second linear guide 310, third linear guides 311 are respectively arranged, and the extending direction of the third linear guide 311 is parallel to the extending direction of the frame 1. The jaw fingers 312 are slidably arranged on each third linear guide 311.

[0068] The driving assembly 32 includes a connecting block 321 and a swing rod rotating shaft 322. Among them, the connecting block 321 is arranged on one side of the frame 1 away from the second linear guide 310, and one end of the connecting block 321 is fixedly connected to the swing rod rotating shaft 322. The extending direction of the swing rod rotating shaft 322 is perpendicular to the extending direction of the frame 1 and extends towards the clamping assembly 31. Specifically, an installation through hole (not shown in the figure) is opened at the corresponding position of the frame 1, and the swing rod rotating shaft 322 is in clearance fit with the installation through hole and passes through the installation through hole. On the end surface of the swing rod rotating shaft 322 near the second linear guide 310, a guiding groove 3221 recessed towards the frame 1 is opened. One ends of the first slider 313 and the second slider 314 close to the swing rod rotating shaft 322 are respectively provided with a first swing rod 3131 and a second swing rod 3141 extending towards the frame 1, and the first swing rod 3131 and the second swing rod 3141 are slidably inserted into the guiding groove 3221.

[0069] The connecting block 321 can be driven to rotate by a motor, a pump body, etc. in the prior art. By driving the connecting block 321 to rotate clockwise, at this time, the first swing rod 3131 and the second swing rod 3141 move away from each other in the guiding groove 3221, and then respectively drive the first slider 313 and the second slider 314 to move away from each other through the first swing rod 3131 and the second swing rod 3141, so that the jaw fingers 312 open, and vice versa, the jaw fingers 312 close.

[0070] Furthermore, the driving assembly 32 further includes a third cam follower 323. A third cam groove (not shown in the figure) is correspondingly opened on the base. One end of the third cam follower 323 is arranged in the corresponding third cam groove (not shown in the figure), and the other end is connected to the end of the connecting block 321 away from the swing rod rotating shaft 322 through a fixing bolt. The third cam follower 323 can be a convex block, etc. in the prior art, and can roll forward along the third cam groove. By driving the connecting block 321 to rotate through the third cam follower 323, and then the connecting block 321 drives the swing rod rotating shaft to rotate.

[0071] Further, a second spring 315 is connected between the first slider 313 and the second slider 314. The second spring 315 can make the first slider 313 and the second slider 314 approach each other along the guiding direction of the second linear guide 310. When the connecting block 321 drives the swing rod rotating shaft 322 to rotate clockwise, through the cooperation of the swing rod rotating shaft 322 with the first transmission member 3132 and the second transmission member 3142, the first slider 313 and the second slider 314 are driven to move away from each other, and the second spring 315 is stretched. When the connecting block 321 drives the swing rod rotating shaft 322 to rotate counterclockwise, the second spring 315 will reset, thereby driving the first slider 313 and the second slider 314 to approach each other, and further driving the jaw fingers 312 to clamp.

[0072] Further, third springs 316 are respectively connected between each jaw finger 312 and the first slider 313 and the second slider 314. The extending direction of the third spring 316 is parallel to the extending direction of the frame 1. The third spring 316 can make the jaw finger 312 move downward in the extending direction of the third linear guide 311. When the jaw finger 312 clamps the battery cell 6 and jacks up the battery cell 6 so that the battery cell 6 contacts and presses against the current collector plate 5 for welding, the jaw finger 312 moves upward with the battery cell 6 in the extending direction of the third linear guide 311. At this time, the third spring 316 is stretched. When the welding is completed and the jaw finger 312 releases the battery cell 6, the third spring 316 resets, thereby driving the jaw finger 312 to move downward and reset in the extending direction of the third linear guide 311.

[0073] The battery cell cup bracket 33 is located below the clamping assembly 31, and includes a support plate 331 and a limiting block 332. Both the support plate 331 and the limiting block 332 are fixedly installed on the frame 1 by screws. The plate surface of the support plate 331 faces the clamping assembly 31, and is provided with a first through hole 3311 whose extending direction is parallel to the extending direction of the frame 1. The first through hole 3311 penetrates through the support plate 331, and the radius of the first through hole 3311 is smaller than the radius of the battery cell cup 60. The limiting block 332 includes a horizontal portion 3321 and a vertical portion 3322. The vertical portion 3322 is fixed to the frame 1, the horizontal portion 3321 is in contact with the upper part of the support plate 331, and the horizontal portion 3321 is provided with an arc-shaped limiting groove 3323. The radius of the limiting groove 3323 is slightly larger than the radius of the battery cell cup 60. During welding, the battery cell cup 60 loads the battery cell 8 into the limiting groove 3323 to be limited and fixed, and is supported by the support plate 331.

[0074] During operation, the battery cup 60 loaded with the battery cell 6 enters the welding fixture through the feeding belt and is fixed on the battery cup bracket 33. At this time, the third cam follower 323 moves along the propulsion direction in the third cam groove (not shown), driving the rocker shaft 322 to rotate counterclockwise, and the first transmission member 3132 and the second transmission member 3142 approach each other in the guide groove 3221, so that the first slider 313 and the second slider 314 are close to each other, and the clamping fingers 312 clamp the battery cell 6.

[0075] Please refer to Figure 7 and Figure 8 The rotating lifting unit 4 is installed at the bottom of the frame 1 and below the battery cell fixing unit 3, and includes a lifting body 42, a rotating assembly 43 and a pressing assembly 44. The lifting body 42 is installed on the frame 1, and the rotating assembly 43 and the pressing assembly 44 are arranged below the lifting body 42 and are installed in cooperation with the lifting body 42.

[0076] The lifting body 42 includes a fourth linear guide 420, a second slider seat 421, a battery core push rod 422 and a support cup push rod 423. Specifically, the fourth linear guide 420 is fixedly mounted on the frame 1 by screws, and its extension direction is parallel to the extension direction of the frame 1, playing a guiding role. The second slider seat 421 is mounted on the fourth linear guide 420, and can slide along the fourth linear guide 420 driven by a motor, a pump body, etc. in the prior art. A second through hole 425 is provided on the second slider seat 421, and the second through hole 425 runs through the second slider seat 421. The support cup push rod 423 passes through the second through hole 425 and is in clearance with the second through hole 425. The support cup push rod 423 is a hollow cylinder, and the battery core push rod 422 is inserted into the support cup push rod 423, and the length of the battery core push rod 422 is greater than the length of the support cup push rod 423. When the lifting body 42 is lifted upward, the cup support rod 423 can pass through the first through hole 3311 and cooperate with the battery cell support cup 60 , and at the same time, the battery cell support rod 422 lifts the battery cell 6 so that the current collecting plate 5 fits the battery cell 6 .

[0077] Furthermore, the lifting body 42 further includes a fourth cam follower 424, and a fourth cam groove (not shown) corresponding thereto is provided on the base. The fourth cam follower 424 is arranged on the side of the second slider seat 421 facing away from the frame 1, and the other end of the fourth cam follower 424 is arranged in the corresponding fourth cam groove. The fourth cam follower 424 can be a convex block in the prior art, etc., and can roll forward along the fourth cam groove, thereby driving the lifting body 42 to move up and down along the extension direction of the fourth linear guide rail 420.

[0078] The rotating assembly 43 includes a servo motor 431, a motor mounting base 432, a first gear 433, a second gear 434, and a coupling 435. Specifically, the motor mounting base 432 is fixedly mounted on the bottom of the second slider base 421, forming an installation space (not marked in the figure) with the second slider base 421. The first gear 433 and the second gear 434 are arranged in the installation space. The first gear 433 is sleeved on one end of the cup top rod 423 axially away from the clamping assembly 31. The rotation of the first gear 433 can drive the cup top rod 423 to rotate. The second gear 434 is meshed and connected with the first gear 433. The servo motor 431 is fixedly mounted on the bottom of the motor mounting base 432, and its output shaft is connected to the second gear 434 through the coupling 435. The first gear 433 is a driven gear, and the second gear 434 is a driving gear. The servo motor 431 drives the second gear 434 to rotate, thereby driving the first gear 433 to rotate, and further driving the cup top rod 423 to drive the cell cup 60 to rotate, changing the welding angle between the current collector plate 5 and the cell 6.

[0079] The pressing assembly 44 includes a third slider base 441, a fourth spring 442, and a pressing plate 443. Specifically, the pressing plate 443 is fixedly connected to the cell top rod 422. The third slider base 441 is connected to the pressing plate 443 through two groups of fourth springs 442. When the third slider base 441 rises, the fourth spring 442 is compressed. At this time, the pressing plate 443 presses the cell top rod 422 upward, and the cell top rod 422 presses the cell 6 so that the cell 6 is pressed against the current collector plate 5. The third slider base 441 can be driven to rise or fall by a motor, a pump body, etc. in the prior art.

[0080] Further, the pressing assembly 44 further includes a fifth cam follower 444. A corresponding fifth cam groove (not shown in the figure) is provided on the base. The fifth cam follower 444 is arranged on the side of the third slider base 441 facing away from the frame 1, and the other end of the fifth cam follower 444 is arranged in the corresponding fifth cam groove. The fifth cam follower 444 can be a convex block or the like in the prior art and can roll forward along the fifth cam groove, thereby driving the third slider base 441 to rise or fall.

[0081] During operation, when the current collector tray adsorption unit 2 adsorbs the current collector tray 5 and the battery core fixing unit 3 clamps the battery core 6, at this time, the fourth cam follower 424 moves along the advancing direction in the fourth cam groove, driving the lifting body 42 to lift. The battery core ejector rod 422 passes through the battery core cup 60 to lift the battery core 6, so that the current collector tray 5 and the battery core 6 are in contact. At the same time, the fifth cam follower 445 moves along the advancing direction in the fifth cam groove, driving the third slider seat 441 to rise. At this time, the fourth spring 442 is compressed, and the pressure is sequentially transmitted along the pressure plate 443 and the battery core ejector rod 422 to the battery core 6, so that the current collector tray 5 and the battery core 6 are completely in close contact. Due to the radial position of the second cam follower 215 being restricted by the second cam groove 10, when the current collector tray 5 and the battery core 6 are pressed tightly, the second cam follower 215 presses the upper edge of the second cam groove 10, that is, the upper edge of the second cam groove 10 is the fixed position reference for welding the current collector tray 5, so that a high positioning accuracy can be achieved during welding. When some batteries require the characteristic points on the end face of the battery core to be welded at an angle with the current collector tray 5, before the battery core fixing unit 3 clamps the battery core 6, the rotating assembly 43 drives the cup ejector rod 423 to rotate. Since the cup ejector rod 423 and the battery core cup 60 are in transition fit and have friction, the rotation of the cup ejector rod 423 drives the rotation of the battery core cup 60, thereby realizing the angle alignment of the characteristic points on the end face of the battery core and meeting the special process requirements for the welding angle between the current collector tray 5 and the battery core 6 with certain requirements.

[0082] Preferably, a pressure sensor (not shown in the figure) can be provided at the bottom of the cup ejector rod 423, so as to facilitate the detection of the pressing force during each welding. At the same time, the compression amount of the fourth spring can be controlled by controlling the rising distance of the third slider seat 441, thereby realizing the adjustment of the pressing force.

[0083] Please refer to Figure 9 , the current collector tray cup 50 is cylindrical and is used to load the current collector tray 5. In this embodiment, four limiting protrusions 501 are uniformly arranged along the circumference of the top of the current collector tray cup 50. The four limiting protrusions 501 and the top surface of the current collector tray cup 50 together form a current collector tray installation groove 502, and the inner diameter of the current collector tray installation groove 502 matches the outer diameter of the current collector tray 5, so as to realize the precise positioning of the current collector tray 5.

[0084] Please refer to Figure 8 , the battery core cup 60 is cylindrical and is used to load the battery core 6. In this embodiment, the battery core cup 60 is provided with a cup inner hole 601 whose extending direction is parallel to the extending direction of the frame 1. The cup inner hole 601 is coaxial with the battery core cup 60 and penetrates through the battery core cup 60. During feeding, the battery core 6 is inserted into the cup inner hole 601 from the upper end surface of the battery core cup 60 and is in clearance fit with the cup inner hole 601, so as to realize the precise positioning of the battery core 8; during lifting, the cup ejector rod 423 is inserted into the cup inner hole 601 from the lower end surface of the battery core cup 60 and is in transition fit with the cup inner hole 601.

[0085] Further, when the current collector plate cell welding jig is assembled, a precision tooling is used to simultaneously adjust the adsorption center of the suction nozzle 221, the center of the arc-shaped mounting groove 2311, the clamping center of the clamping jaw fingers 312, the center of the first through hole 3311, the center of the limit groove 3323, and the axis of the cup ejector rod 423 to be coaxial, so as to ensure the coaxial accuracy of the current collector plate 5 and the cell 6 during welding.

[0086] Further, a CCD vision system (not shown in the figure) is also installed on the feeding belt for transferring the cell cup 60 to the welding jig. For some batteries with cell end face feature points that require welding the cell end face feature points at a fixed angle with the current collector plate 5, through the recognition of the CCD vision system, the control system sends the alignment angle to the servo motor 431, and then the servo motor 431 drives the cup ejector rod 423 to rotate. Since the cup ejector rod 423 and the inner hole 601 of the cup have an interference fit and have a certain frictional force, the cup ejector rod 423 drives the cell cup 60 and the cell 6 to rotate, so that the cell end face feature points are rotated to the specified angle, thereby realizing the angle alignment of the cell end face feature points and meeting the special process requirements for the welding angle of some current collector plates 5 and cells 6.

[0087] After the current collector plate cell welding jig is installed on the base, it moves relative to the base so that the cam follower moves along the advancing direction in the corresponding cam groove. When the current collector plate cell welding jig moves relative to the base and the welding trigger rod 7 enters the sensing range of the welding station sensor, a trigger signal is output to start the welding process.

[0088] Please refer to Figure 10, taking the second cam groove 10 as an example, the second cam groove 10 includes several rising segments 101, falling segments 102 and horizontal segments 103. When the second cam follower 215 moves on the rising segment 101, it drives the suction cup mounting seat 212 to move along the first linear guide 210. When the second cam follower 215 moves on the falling segment 102, it drives the suction cup mounting seat 212 to move downward along the first linear guide 210. When the second cam groove moves on the horizontal segment 103, the suction cup mounting seat 212 does not move relative to the first linear guide 210. The positions, lengths, inclination angles, etc. of the rising segment 101, falling segment 102 and horizontal segment 103 are set according to the specific needs of the welding process, so that the position of the suction cup mounting seat 212 meets the requirements of the corresponding process. Correspondingly, the structures of the first cam groove, the third cam groove, the fourth cam groove and the fifth cam groove are basically the same as that of the second cam groove 10. The difference is that, according to the requirements of the corresponding process, the positions, lengths, inclination angles, etc. of their respective rising segments, falling segments and horizontal segments are different and are set according to the requirements of the corresponding process, so that the specific positions of the first slider seat 211, the connecting block 321, the second slider seat 421 and the third slider seat 441 corresponding to the first cam follower 214, the third cam follower 323, the fourth cam follower 424 and the fifth cam follower 445 meet the requirements of the corresponding process.

[0089] The working principle of the current collector plate battery cell welding jig provided by this application is as follows: After the current collector plate cup 50 loaded with the current collector plate 5 and the battery cell cup 60 loaded with the battery cell 6 enter the welding jig, the welding jig moves along the advancing direction. Under the action of the first cam follower 214 and the second cam follower 215, the first slider seat 211 and the suction cup mounting seat 212 move downward. At this time, the first spring 213 is compressed. Under the action of the pressure, the suction cup nozzle 221 is pressed into the current collector plate cup 50, thereby adsorbing the current collector plate 5. Then the current collector plate cup 50 is removed from the welding jig. Next, the welding jig continues to move along the advancing direction. Under the action of the fourth cam follower 424, the jacking body 42 jacks up, and the battery cell 6 is jacked up, so that the current collector plate 5 is in contact with the battery cell 6. At the same time, under the action of the third cam follower 323, the jaw fingers 312 clamp the battery cell 6 for secondary precise positioning to prevent the battery cell 6 from deflecting during the jacking process. Then the welding jig continues to move along the advancing direction. Under the action of the fifth cam follower 444, the pressing assembly 44 applies a pressing force to the battery cell 6. At this time, the second cam follower 215 abuts against the upper edge of the second cam groove 10, and this is used as the welding position reference for the current collector plate 5. As the welding jig moves, when the welding laser trigger rod 7 enters the sensing area of the welding station sensor, a trigger signal is output to start the welding process. In addition, when encountering special process requirements that require the end face feature points of the battery cell to be welded at a fixed angle with the current collector plate 5, the rotating assembly 43 drives the cup ejector rod 423 to rotate, thereby driving the battery cell cup 60 and the battery cell 6 to rotate, and the angle alignment of the end face feature points of the battery cell is completed according to the angle data of the CCD vision system.

[0090] The current collector plate battery cell welding jig and the current collector plate battery cell welding device provided by this application have the following advantages:

[0091] (1) Through the action of the cam followers of each mechanism and the corresponding cam grooves when the welding jig moves along the advancing direction, processes such as current collector plate adsorption, battery cell clamping, battery cell jacking, and current collector plate battery cell pressing are completed, and the control logic is simple and convenient.

[0092] (2) The center of the suction cup nozzle of the welding jig for the current collector plate and the battery cell, the center of the arc-shaped mounting groove, the clamping center of the jaw fingers, the center of the second through hole, the center of the limiting groove, and the axis of the cup ejector rod are coaxial, ensuring the coaxial accuracy of the battery cell and the current collector plate during welding.

[0093] (3) When welding, the upper edge of the second cam groove is used as the position reference for the current collector plate, the welding position is fixed, and the welding accuracy is high.

[0094] (4) A rotating assembly is provided, which can realize the angle alignment of the battery cell and meet the process requirements for the welding angle between some battery cells and the current collector plate.

[0095] (5) A gripper mechanism is provided. When the battery cell is lifted, the gripper mechanism can clamp the battery cell to achieve secondary positioning, avoiding deflection of the battery cell during the lifting process.

[0096] (6) The adsorption assembly is provided with a dust suction port and a nitrogen interface. During welding, it can timely suck away the smoke and dust generated during welding and blow nitrogen to prevent oxidation, improving the welding effect.

[0097] The above-described embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and the present utility model also intends to include these modifications and deformations.

Claims

1. A current collector plate cell welding jig, characterized in that Comprising: A frame (1) which extends in the vertical direction; A current collector plate adsorption unit (2), installed at the uppermost part of the frame (1) and capable of moving up and down along the frame (1), including a suction cup nozzle (221); A battery cell fixing unit (3), including two clamping jaw fingers (312) located below the current collector plate adsorption unit (2) and capable of separating or approaching in the horizontal direction; A rotary lifting unit (4), including a cup ejector rod (423) located below the battery cell fixing unit (3) and capable of moving up and down along the frame (1); The adsorption center of the suction cup nozzle (221), the clamping center of the clamping jaw fingers (312), and the axis of the cup ejector rod (423) are on the same axis, and the same axis extends in the vertical direction.

2. The current collector plate cell welding jig according to claim 1, wherein: The current collector plate adsorption unit (2) includes: A motion assembly (21), including a first linear guide rail (210), a first slider seat (211), a suction cup mounting seat (212), and a first spring (213); the first linear guide rail (210) is fixedly arranged on the frame (1) and extends in the vertical direction; the first slider seat (211) and the suction cup mounting seat (212) are slidably mounted on the first linear guide rail (210) in sequence from top to bottom; the first spring (213) is connected between the first slider seat (211) and the suction cup mounting seat (212); A suction cup assembly (22), including a fixing plate (220), the fixing plate (220) is fixedly arranged on the suction cup mounting seat (212); the suction cup nozzle (221) is fixedly mounted on the fixing plate (220), and its opening faces downward; A current collector plate cup bracket (23), located below the suction cup assembly (22), including a horizontal end (231) fixed on the frame (1), an arc-shaped mounting groove (2311) for accommodating a current collector plate cup (50) is formed on the side of the horizontal end (231) facing the suction cup nozzle (221), and the center of the arc-shaped mounting groove (2311) is located on the same axis.

3. The current collecting plate cell welding jig according to claim 2, characterized in that: The battery cell fixing unit (3) includes: The clamping assembly (31) includes a second linear guide rail (310), a third linear guide rail (311), jaw fingers (312), a first slider (313), a second slider (314), a second spring (315), and two third springs (316); the second linear guide rail (310) is fixedly arranged on the frame (1) and extends in the horizontal direction; the first slider (313) and the second slider (314) are slidably arranged on the second linear guide rail (310), and on one side of the first slider (313) and the second slider (314) facing away from the second linear guide rail (310), there is a third linear guide rail (311) extending in the vertical direction; the jaw fingers (312) are slidably arranged on each third linear guide rail (311); the second spring (315) is connected between the first slider (313) and the second slider (314), and the two third springs (316) are respectively connected between the first slider (313) and the jaw fingers (312) located at the first slider (313), and between the second slider (314) and the jaw fingers (312) located at the second slider (314); The driving assembly (32) includes a connecting block (321) and a swing rod rotating shaft (322), the swing rod rotating shaft (322) passes through the frame (1) and extends towards the clamping assembly (31), and a guiding groove (3221) is opened on the end face of the end close to the clamping assembly (31); at one end of the first slider (313) and the second slider (314) close to the swing rod rotating shaft (322), there are respectively a first swing rod (3131) and a second swing rod (3141), and the first swing rod (3131) and the second swing rod (3141) are slidably inserted into the guiding groove (3221); the connecting block (321) is located at one end of the swing rod rotating shaft (322) away from the clamping assembly (31); The battery cell cup bracket (33) is located below the clamping assembly (31), and includes a support plate (331) and a limiting block (332) fixedly arranged on the frame (1), the support plate (331) is provided with a first through hole (3311) whose axis extends in the vertical direction, and the first through hole (3311) penetrates through the support plate (331); the limiting block (332) is located above the support plate (331) and is provided with a limiting groove (3323) for fixing the battery cell cup (60), and the center of the limiting groove (3323) is located on the same axis.

4. The current collector plate cell welding jig according to claim 3, characterized in that: The rotary lifting unit (4) includes: The lifting main body (42) includes a fourth linear guide rail (420), a second slider seat (421), a battery cell ejector rod (422) and a cup ejector rod (423); the fourth linear guide rail (420) is fixedly arranged on the frame (1) and extends in the vertical direction; the second slider seat (421) is slidably arranged on the fourth linear guide rail (420), the cup ejector rod (423) movably passes out of the second slider seat (421) and extends towards the battery cell cup bracket (33), and the cup ejector rod (423) can pass through the first through hole (3311); the battery cell ejector rod (422) is inserted into the cup ejector rod (423), and one end close to the battery cell cup bracket (33) is located outside the cup ejector rod (423). The pressing assembly (44) includes a third slider seat (441), a fourth spring (442) and a pressing plate (443), the pressing plate (443) is fixedly arranged at one end of the battery cell ejector rod (422) away from the battery cell cup bracket (33), the third slider seat (441) can move in the vertical direction and is connected to one side of the pressing plate (443) away from the battery cell ejector rod (422) through the fourth spring (442).

5. The current collector plate cell welding fixture according to claim 4, characterized in that: The rotary lifting unit (4) further includes: A rotating assembly (43) includes a servo motor (431), a first gear (433) and a second gear (434); the first gear (433) is sleeved at one end of the cup ejector rod (423) axially away from the clamping assembly (31), the second gear (434) is meshed and connected with the first gear (433), and the output shaft of the servo motor (431) is connected to the second gear (434).

6. A current collector plate cell welding device, characterized in that, Including: The current collector battery cell welding jig, the base and the laser welding machine according to any one of claims 4 or 5; the laser welding machine is fixedly installed on the base; The current collector battery cell welding jig is installed on the base and can be moved relative to the base to the laser welding machine for welding operations.

7. The current collector plate cell welding device according to claim 6, characterized in that: The base is provided with a first cam groove, a second cam groove (10), a third cam groove, a fourth cam groove and a fifth cam groove; the first cam groove, the second cam groove (10), the third cam groove, the fourth cam groove and the fifth cam groove respectively include a rising section, a falling section and a horizontal section; The current collector plate cell welding fixture further includes a first cam follower (214), a second cam follower (215), a third cam follower (323), a fourth cam follower (424), and a fifth cam follower (444); one ends of the first cam follower (214) and the second cam follower (215) are respectively connected to the first slider base (211) and the suction cup mounting base (212), and the other ends are respectively arranged in the first cam groove and the second cam groove (10); one end of the third cam follower (323) is arranged on the connecting block (321), and the other end is arranged in the third cam groove; one ends of the fourth cam follower (424) and the fifth cam follower (444) are respectively connected to the second slider base (421) and the third slider base (441), and the other ends are respectively arranged in the fourth cam groove and the fifth cam groove; The first cam follower (214), the second cam follower (215), the third cam follower (323), the fourth cam follower (424), and the fifth cam follower (444) respectively move up and down along the first cam groove, the second cam groove (10), the third cam groove, the fourth cam groove, and the fifth cam groove, and respectively move up and down along different rising segments, falling segments, and horizontal segments set according to the process requirements.

8. The current collector plate cell welding device according to claim 6, wherein: It further includes a current collector plate support cup (50), and a current collector plate mounting groove (502) is provided at the top thereof.

9. The current collector plate cell welding device according to claim 6, characterized in that: It further includes a cell support cup (60), and the cell support cup (60) is provided with a support cup inner hole (601) whose axis extends in the vertical direction, and the support cup inner hole (601) penetrates through the cell support cup (60).

10. The current collector plate cell welding device according to claim 6, characterized in that: It further includes a welding trigger rod (7) and a welding station sensor, and the welding trigger rod (7) moves with the current collector plate cell welding fixture; the welding station sensor is fixedly arranged on the base and is close to the laser welding machine.

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