An automatic spot welding machine for battery pack assembly

Abstract

The present invention relates to the field of battery technology, and in particular to an automatic spot welding machine for battery pack assembly. The technical problem to be solved by the present invention is that the cooperation of the two unloading mechanisms in the prior art is inaccurate and out of sync. The technical implementation scheme of the present invention is: an automatic spot welding machine for battery pack assembly, comprising a first chassis, in which a placement mechanism for intermittent unloading of battery packs is arranged, and the placement mechanism comprises a stepper motor, a rotating shaft, a rotating sleeve, etc.; the stepper motor is arranged in the middle and upper part of one side of the first chassis, the output shaft of the stepper motor is fixedly connected to the rotating shaft, the middle part of the rotating shaft is fixedly connected to the rotating sleeve, a plurality of placement tubes are fixedly connected to the outer circumferential array of the rotating sleeve, and a guide tube is fixedly connected to the right part of the top of the first chassis. The present invention can realize intermittent unloading of battery cells through the design of the stepper motor and the placement tube, and the battery cells can fall in the placement tube by their own weight.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to an automatic spot welding machine for assembling a battery pack. Background Art

[0002] Energy storage technology has developed to the point where it has become an indispensable part of social development. With the development of batteries and the diversification of their applications, batteries have provided more convenient energy for human life. Continuous and efficient energy has brought more extended inspiration for the development of industry and life. Among them, lithium batteries stand out among many energy storage technologies with their excellent performance.

[0003] During the assembly process of the lithium battery pack, the battery cells and the battery holder need to be assembled together first. The unloading process of the battery cells and the battery holder is an interval unloading process. In the prior art, the coordination of the two unloading mechanisms is inaccurate and out of sync, resulting in a high defective rate of assembled products in the assembly line production of the battery pack, which in turn affects the subsequent welding process, making it impossible to guarantee the quality of the lithium battery pack assembly and resulting in low production efficiency. Summary of the invention

[0004] In order to overcome the shortcomings of unsynchronized unloading of battery cells and battery holders, uneven quality and low production efficiency, the technical problem of the present invention is to provide an automatic spot welding machine for battery pack assembly.

[0005] The technical implementation scheme of the present invention is as follows: an automatic spot welding machine for assembling a battery pack comprises a first chassis, a placing mechanism for intermittent unloading of battery packs is arranged in the first chassis, the placing mechanism comprises a rotating shaft, a rotating sleeve, a placing tube, a guide tube, a protective shell, a battery cell inlet, a battery cell outlet, a connecting plate, a guide seat, a battery cell bracket and a power unit, a rotating shaft is rotatably connected in the first chassis, a rotating sleeve is fixedly connected in the middle of the rotating shaft, a plurality of placing tubes are fixedly connected in a circular array outside the rotating sleeve, a guide tube is fixedly connected to the right part of the top of the first chassis, and a notch in the middle of the top of the first chassis is fixedly connected to the placing tube. A protective shell is provided for the placement tube, a battery cell inlet is provided on the upper left side of the protective shell, the battery cell inlet is aligned with the bottom end of the guide tube, a battery cell outlet is provided on the bottom end of the protective shell, a connecting plate is provided in the protective shell with a circle center array having a gap with one end of the placement tube and fixedly connected to the placement tube, a guide seat is fixedly connected to the upper middle part of the first chassis, the guide seat is located at the lower side of the battery cell outlet and aligned with the battery cell outlet, the guide seat can keep the battery cell in a vertical state when passing through the guide seat, and the battery cell can fall accurately into the battery cell holder after passing through the guide seat, and a power unit is provided on the first chassis, the power unit is used to drive the rotating shaft to move.

[0006] As a preferred technical solution of the present invention, the placement mechanism also includes a sorting machine and a dustproof box. The sorting machine is provided on the left side of the top of the first chassis, and a dustproof box is provided at the lower right end of the sorting machine. The top end of the guide tube is located in the dustproof box.

[0007] As a preferred technical solution of the present invention, it also includes a first transmission part, the first transmission part includes a first pulley, a first transmission shaft, a second pulley, a first conveyor belt and a limit plate, the first pulley is fixedly connected to the left part of the rotating shaft, the first transmission shaft is rotatably connected to the front of the lower part of the first chassis, one end of the first transmission shaft is located directly below the first pulley, one end of the first transmission shaft is fixedly connected to the second pulley, a belt is installed between the first pulley and the second pulley, the first transmission shaft is fixedly connected to a rotating wheel, the first transmission shaft is meshed with the first conveyor belt through the rotating wheel, the limit plate is fixedly connected to the first chassis, and the limit plate is located above the first conveyor belt.

[0008] As a preferred technical solution of the present invention, it also includes a driving component, a transmission component, a first receiving plate and a nickel sheet delivery box. The driving component is arranged in the first chassis, and the transmission component is installed on the driving component. The nickel sheet delivery box is fixedly connected to the right side of the lower part of the first chassis. The nickel sheet delivery box is located on the upper and lower sides of the transmission component, and the first receiving plate is fixedly connected to the right side of the lower part of the first chassis.

[0009] As a preferred technical solution of the present invention, it also includes a telescopic cylinder and a bending plate. The telescopic cylinder is fixedly connected to the upper right part of the first chassis, and one end of the telescopic cylinder is fixedly connected to the bending plate.

[0010] As a preferred technical solution of the present invention, it also includes a welding mechanism, which includes a support frame, a second transmission shaft, a power assembly, a cam, a sliding groove, a connecting shaft and a rolling shaft. The bottom end of the support frame is fixedly connected to the bottom of the front side of the first chassis, and the second transmission shaft is rotatably connected in the support frame. The second transmission shaft passes through the left end of the support frame and is connected to the power assembly. The power assembly transmits power to the second transmission shaft. The second transmission shaft is fixedly connected with a cam, and the support frame is fixedly connected with a sliding groove. The sliding groove is slidably connected with a connecting shaft, and the rolling shaft is fixedly connected to the connecting shaft.

[0011] As a preferred technical solution of the present invention, the welding mechanism also includes a lifting frame, a spring and a welding frame. The lifting frame is slidably connected to the support frame, one end of the lifting frame in the vertical direction is fixedly connected to the connecting shaft, the top surface of one end of the lifting frame is fixedly connected to the welding frame, a spring is fixedly connected between the inner end surface of the lifting frame and the welding frame, and the top surface of one end of the welding frame is connected to a welding gun.

[0012] As a preferred technical solution of the present invention, it also includes a laminating mechanism, the laminating mechanism includes a second chassis, a second docking plate, a third docking plate, a guide rail, a first driving motor, a third transmission shaft, a third pulley, a gear, a guide frame and a rack, the left front side of the second chassis is connected and communicated with the right end of the first chassis, one end of the first docking plate is fixedly connected to one end of the second docking plate and one end of the third docking plate respectively, the other ends of the second docking plate and the third docking plate are fixedly connected to the right end surface in the second chassis, the right end top of the second chassis is fixedly connected to the guide rail, a sliding shell is slidably connected in the guide rail, the first driving motor is fixedly connected in the sliding shell, the output shaft of the first driving motor is fixedly connected to the third transmission shaft, the third transmission shaft is fixedly connected to the third pulley, the third transmission shaft is fixedly connected to the gear, the gear is located on the left side of the third pulley, a belt is installed on the third pulley, the third transmission shaft is rotatably connected to the guide frame, the second chassis is fixedly connected to the rack, the rack is located below the gear, and the gear is meshed with the rack.

[0013] As a preferred technical solution of the present invention, the bonding mechanism also includes a balance rod, a guide bracket, an adsorption plate and a suction cup. The guide bracket is fixedly connected to an end face on one side inside the second chassis. Grooves are provided on both side end faces of the guide bracket. A protruding shaft matching the groove provided in the guide bracket is provided in the middle of the balance rod. The balance rod is slidingly connected to the guide bracket in the groove provided in the guide bracket through the protruding shaft. The left and right ends of the balance rod are fixedly connected with an adsorption plate. A suction cup for adsorbing green shell paper is provided at the bottom of the adsorption plate. A green shell paper storage box is provided on one side of the adsorption plate along the vertical direction. A separation suction cup unit for peeling off release paper is provided on the right side of the green shell paper storage box.

[0014] As a preferred technical solution of the present invention, the laminating mechanism also includes a second drive motor, a second conveyor belt, a discharge roller and a discharge port. The third drive motor is fixedly connected to the middle of one side of the right part of the second chassis. The output shaft of the third drive motor is fixedly connected to the drive wheel. The output shaft of the second drive motor is meshed with the second conveyor belt through the drive wheel. A discharge port is opened in the middle of the right end of the second chassis, and a discharge roller is fixedly connected to the discharge port.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The design of the stepper motor and the placement tube of the present invention can realize intermittent unloading of battery cells. The battery cells can fall in the placement tube by their own weight. The battery cells can be blocked from falling by the connecting plate during the rotation of the placement tube to prevent the battery cells from falling into the gaps between the placement tubes. The battery cells can be accurately dropped into the battery cell holder through the guide seat to avoid defective products due to inconsistent movement frequency between the battery cell holder and the battery cell.

[0017] 2. The present invention realizes the alternation of the frequency of the cam-driven rolling shaft and the frequency of the transmission component conveying the battery cell bracket through the design of intermittent rotation of the servo motor at the driving component and the brushless motor at the power component, and the precise welding of the battery cell and the nickel sheet is achieved by driving the welding frame to rise by the cam-driven rolling shaft.

[0018] 3. The present invention uses the design of the guide bracket to ensure that the adsorption plate drives the green shell paper to move without being affected by other parts, causing the green shell paper to be damaged and wrinkled, and unable to fit smoothly with the welding part of the battery core, thereby reducing the probability of producing defective products.

[0019] 4. The present invention can make the blue shell paper and the battery holder closely fit and flatten the battery holder through the design of the discharge roller when the battery holder passes through the discharge roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a partial structural schematic diagram of the placing mechanism of the present invention;

[0022] Figure 3 It is a schematic diagram of the installation structure of the placement pipe of the placement mechanism of the present invention;

[0023] Figure 4 is a schematic structural diagram of the first transmission part of the present invention;

[0024] Figure 5 It is a partial structural schematic diagram of the driving assembly and welding mechanism of the present invention;

[0025] Figure 6 It is a schematic diagram of the installation structure of the telescopic cylinder of the present invention;

[0026] Figure 7 For the present invention Figure 5 A magnified view of the local structure at point A in the middle;

[0027] Figure 8 It is a structural schematic diagram of the laminating mechanism of the present invention;

[0028] Fig. 9 For the present invention Figure 8 A magnified view of the local structure at B in the middle;

[0029] Fig.10 For the present invention Figure 8 A magnified view of the local structure at C in the middle;

[0030] Fig.11 For the present invention Figure 8 Enlarged view of the local structure at point D in the middle.

[0031] Among them: 1... the first chassis, 2... the placement mechanism, 201... the rotating shaft, 202... the rotating sleeve, 203... the placement tube, 204... the guide tube, 205... the protective shell, 206... the battery cell inlet, 207... the battery cell outlet, 208... the connecting plate, 209... the guide seat, 210... the sorting machine, 211... the dust box, 3... the first pulley, 301... the first transmission shaft, 302... the second pulley, 303... the first conveyor belt, 304... the limit plate, 4... the driving component, 401... the transmission component, 402... the first receiving plate, 403... the nickel sheet delivery box, 404... the telescopic cylinder, 405... the bending plate, 5... the welding mechanism, 501... the support frame, 502... the second transmission shaft, 503... .Power assembly, 504...cam, 505...sliding groove, 506...connecting shaft, 507...rolling shaft, 508...lifting frame, 509...spring, 510...welding frame, 6...fitting mechanism, 601...second chassis, 602...second receiving plate, 603...third receiving plate, 604...guide rail, 605...first driving motor, 606...third transmission shaft, 607...third pulley, 608...gear, 609...guide frame, 610...rack, 611...balance bar, 612...guide bracket, 613...adsorption plate, 614...suction cup, 615...second driving motor, 616...second conveyor belt, 617...discharging roller, 618...discharging port, 100...battery cell bracket. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. Example

[0033] An automatic spot welding machine for battery pack assembly, such as Figure 1-3As shown, it includes a first chassis 1, and a placement mechanism 2 for intermittent unloading of battery packs is arranged in the first chassis 1. The placement mechanism 2 includes a rotating shaft 201, a rotating sleeve 202, a placement tube 203, a guide tube 204, a protective shell 205, a battery cell inlet 206, a battery cell outlet 207, a connecting plate 208, a guide seat 209, a battery cell bracket 100 and a power unit. The upper part of the first chassis 1 is rotatably connected to the rotating shaft 201, the middle part of the rotating shaft 201 is fixedly connected to the rotating sleeve 202, and seven rows of placement tubes 203 are fixedly connected to the outer circumferential array of the rotating sleeve 202. The right part of the top of the first chassis 1 is fixedly connected to the guide tube 204, and the protective shell 205 matched with the placement tube 203 is fixedly connected in the notch in the middle part of the top of the first chassis 1. The protective shell 205 can prevent To prevent the battery cells from falling when driven by the placement tube 203, a battery cell inlet 206 is opened on the upper left side of the protective shell 205, and the battery cell inlet 206 is aligned with the bottom end of the guide tube 204. A battery cell outlet 207 is opened at the bottom end of the protective shell 205, and the protective shell 205 has a connecting plate 208 that is gap-matched with one end of the placement tube 203 and fixedly connected to the placement tube 203 in a circular array. One end of the connecting plate 208 is fitted with the protective shell 205, and a guide seat 209 is fixedly connected to the upper middle part of the first chassis 1. The guide seat 209 is located at the lower side of the battery cell outlet 207 and is aligned with the battery cell outlet 207. The guide seat 209 can keep the battery cell in a vertical state when passing through the guide seat 209. After passing through the guide seat 209, the battery cell can accurately fall into the battery cell holder 100, and the power unit is a stepper motor.

[0034] The stepper motor is started, and the stepper motor drives the rotating shaft 201 to rotate intermittently through the output shaft. The rotating shaft 201 is driven by force to drive the rotating sleeve 202 to rotate, and the rotating sleeve 202 is driven by force to drive the placement tube 203 to rotate. The placement tube 203 rotates in the protective shell 205. After each rotation of the placement tube 203, one column is vertically aligned with the battery cell inlet 206, and the battery cell can fall into the placement tube 203 through the battery cell inlet 206. Another column is aligned with the battery cell outlet 207, and the battery cell can fall through the battery cell inlet 206 under its own weight. When the placement tube 203 rotates Each two rows of placement tubes 203 can block the battery cell inlet 206 through the connecting plate 208 designed between the top ends thereof, thereby preventing the battery cells from falling between the two rows of placement tubes 203 during the rotation of the placement tubes 203. When the placement tubes 203 drive the battery cells to move to the battery cell outlets 207, the battery cells can fall downward through the battery cell outlets 207 under their own weight. After passing through the battery cell outlets 207, the battery cells pass through the guide seats 209. The guide seats 209 keep the battery cells in a vertical state when falling. After passing through the guide seats 209, the battery cells can accurately fall into the battery cell holder 100.

[0035] The placement mechanism 2 also includes a sorting machine 210 and a dustproof box 211. The sorting machine 210 is provided on the left side of the top of the first chassis 1. The sorting machine 210 is used to screen the positive and negative electrodes of the battery cells. The dustproof box 211 is provided at the lower right end of the sorting machine 210, and the top of the guide tube 204 is located in the dustproof box 211.

[0036] The staff puts the battery cells into the sorting machine 210 and starts the sorting machine 210. The sorting machine 210 screens the positive poles once and the negative poles once in an alternating manner and transports the battery cells into the inlet of the guide tube 204 at a speed equal to the rotation frequency of the placement tube 203. The battery cells fall downward in the guide tube 204 due to their own weight. When the battery cells pass through the bottom of the guide tube 204, they pass through the protective shell 205. After passing through the battery inlet 206 in the protective shell 205, the battery cells fall into the placement tube 203. When the placement tube 203 drives the battery cells to move to the battery cell outlet 207, the battery cells fall downward through the battery cell outlet 207 due to their own weight. The dustproof box 211 is used to prevent dust from entering the placement mechanism 2. Example

[0037] On the basis of Example 1, Figure 4-6 As shown, it also includes a first transmission part 3, the first transmission part 3 includes a first pulley 3, a first transmission shaft 301, a second pulley 302, a first conveyor belt 303 and a limit plate 304, the first pulley 3 is fixedly connected to the left part of the rotating shaft 201, the first transmission shaft 301 is rotatably connected to the lower front part of the first chassis 1, one end of the first transmission shaft 301 is located directly below the first pulley 3, one end of the first transmission shaft 301 is fixedly connected to the second pulley 302, the first pulley 3 and the second pulley 302 are in the same plane, a belt is installed between the first pulley 3 and the second pulley 302, the first transmission shaft 301 is fixedly connected to the first transmission shaft 301, the first transmission shaft 301 is meshed with the first conveyor belt 303 through the rotating wheel, the limit plate 304 is vertically fixedly connected in the vertical direction in the first chassis 1, the limit plate 304 is located above the first conveyor belt 303, and the limit plate 304 is used for balancing the support of the battery cell bracket 100.

[0038] The staff places the battery cell holder 100 on the first conveyor belt 303 through the feeding port at the top left end of the first chassis 1. The battery cell holder 100 is kept balanced by the limit plate 304. The rotating shaft 201 drives the first pulley 3 to rotate intermittently. The first pulley 3 drives the second pulley 302 to rotate intermittently through the belt. The second pulley 302 drives the first transmission shaft 301 to rotate intermittently. The first transmission shaft 301 drives the first conveyor belt 303 to rotate intermittently. In this way, the first conveyor belt 303 conveys the battery cell holder 100 at a speed synchronized with the battery cell conveying frequency. When the battery cell holder 100 moves to the bottom of the guide seat 209, the battery cell can fall into the battery cell holder 100 accurately.

[0039] It also includes a driving component 4, a transmission component 401, a first receiving plate 402 and a nickel sheet delivery box 403. The driving component 4 is arranged in the first chassis 1. The driving component 4 is composed of a servo motor, a bevel gear and a transmission rod. The servo motor of the driving component 4 is started, and the servo motor transmits power to the transmission component 401 through the bevel gear and the transmission rod. The transmission component 401 is composed of a support rod and a conveyor belt. The transmission rod drives the conveyor belt to transport the battery cell bracket 100. The support rod fixes the position of the conveyor belt. A nickel sheet delivery box 403 is fixedly connected to the lower right portion of the first chassis 1. The nickel sheet delivery box 403 is located on the upper and lower sides of the transmission component 401. The nickel sheet delivery box 403 is used to place nickel sheets on the battery cell bracket 100. The first receiving plate 402 is fixedly connected to the lower right portion of the first chassis 1.

[0040] When the first conveyor belt 303 conveys the battery cell holder 100 to the first receiving plate 402, the bottom end of the battery cell holder 100 contacts the first receiving plate 402, and the two sides of the battery cell holder 100 contact the belt of the transmission assembly 401, and the servo motor at the drive assembly 4 is started, and the output shaft of the servo motor starts to rotate intermittently. The servo motor drives the bevel gear to rotate through the output shaft, and the bevel gear drives the bevel gear meshing with it to rotate. The upper bevel gear transmits power to the upper transmission assembly 401, and the transmission assembly 401 conveys the battery cell holder 100 through the belt. When the belt moves the battery cell holder 100 to the nickel sheet delivery box 403, the nickel sheet delivery box 403 pushes the nickel sheet onto the battery cell holder 100. In the process of the battery cell holder 100 being moved by the belt, the first receiving plate 402 provides a balanced support for the battery cell holder 100 to prevent the battery cell holder 100 from becoming unbalanced and falling during the movement.

[0041] It also includes a telescopic cylinder 404 and a bending plate 405. The telescopic cylinder 404 is symmetrically fixedly connected to the upper right part of the first chassis 1. One end of the telescopic cylinder 404 is fixedly connected to the bending plate 405, and the bending plate 405 is L-shaped.

[0042] When one end of the battery cell holder 100 moves to the middle of the telescopic cylinder 404, the telescopic cylinder 404 drives the bending plate 405 to extend, and the bending plate 405 extends to contact the nickel sheet ear and bends the nickel sheet ear. Through the L-shaped design of the bending plate 405, the nickel sheet ear can be squeezed and fit with one side of the battery cell holder 100. Example

[0043] On the basis of Example 2, Figure 7-11As shown, it also includes a welding mechanism 5, which includes a support frame 501, a second transmission shaft 502, a power assembly 503, a cam 504, a sliding groove 505, a connecting shaft 506 and a rolling shaft 507. The bottom end of the support frame 501 is fixedly connected to the bottom of the front side of the first chassis 1, and the second transmission shaft 502 is rotatably connected in the support frame 501. The second transmission shaft 502 passes through the left end of the support frame 501 and is connected to the power assembly 503. The power assembly 503 is composed of a brushless motor, a pulley and a belt. The brushless motor of the power assembly 503 is started, and the output shaft of the brushless motor starts to rotate intermittently. The brushless motor transmits power to the second transmission shaft 502 through the pulley and the belt. The second transmission shaft 502 is fixedly connected with cams 504. The sliding grooves 505 are symmetrically fixedly connected to the left and right ends of the support frame 501, and the connecting shaft 506 is slidably connected in the sliding groove 505. The connecting shaft 506 is fixedly connected to the rolling shaft 507.

[0044] Start the brushless motor of the power component 503. The rotation frequencies of the brushless motor of the power component 503 and the servo motor of the transmission component 401 are alternated. The brushless motor of the power component 503 drives the pulley to rotate through the output shaft. The pulley drives the pulley on the lower side to rotate through the belt. The two pulleys drive the second transmission shaft 502 to rotate. The second transmission shaft 502 drives the cam 504 to rotate. When the cam 504 rotates, the outer wall contacts the rolling shaft 507 and pushes the rolling shaft 507. The rolling shaft 507 is driven by the force to drive the connecting shaft 506 to move up and down. The two ends of the connecting shaft 506 slide upward in the sliding groove 505. After each rotation, the cam 504 always faces the rolling shaft 507 with the groove, thereby realizing that the cam 504 intermittently pushes the rolling shaft 507 to slide up and down.

[0045] The welding mechanism 5 also includes a lifting frame 508, a spring 509 and a welding frame 510. The support frame 501 is symmetrically slidably connected to the lifting frame 508 up and down. One end of the lifting frame 508 in the vertical direction is fixedly connected to the connecting shaft 506. The top surface of one end of the lifting frame 508 is fixedly connected to the welding frame 510. A spring 509 is fixedly connected between the inner end surfaces of the two lifting frames 508 and the welding frame 510. The spring 509 is used to drive the lifting frame 508 to reset. The top surface of one end of the welding frame 510 is connected to a welding gun.

[0046] When the rolling shaft 507 is intermittently lifted up by the cam 504, the rolling shaft 507 drives the lifting frame 508 to slide up and down intermittently on the support frame 501 through the connecting shaft 506. The welding frame 510 slides up and down and is reset by the spring 509. When the transmission component 401 transports one end of the battery cell holder 100 to between the two welding frames 510, the welding frame 510 is driven by the lifting frame 508 to move toward the battery cell holder 100 and contact the battery cell holder 100. The welding head contacts the nickel sheet and retracts after the nickel sheet and the battery cell are welded. The design of alternating rotation frequencies of the brushless motor of the power component 503 and the servo motor of the transmission component 401 can make the welding frame 510 move toward the battery cell holder 100 and perform welding when the transmission component 401 drives the battery cell holder 100 to stop moving, thereby preventing welding deviation caused by welding when the battery cell holder 100 moves.

[0047] The laminating mechanism 6 is also included, and the laminating mechanism 6 includes a second chassis 601, a second receiving plate 602, a third receiving plate 603, a guide rail 604, a first driving motor 605, a third transmission shaft 606, a third pulley 607, a gear 608, a guide frame 609 and a rack 610. The front side of the left portion of the second chassis 601 is connected to the right end of the first chassis 1, one end of the first receiving plate 402 is respectively fixedly connected to one end of the second receiving plate 602 and one end of the third receiving plate 603, the other ends of the second receiving plate 602 and the third receiving plate 603 are fixedly connected to the right end surface of the second chassis 601, the top of the right end of the second chassis 601 is fixedly connected to the guide rail 604, a sliding shell is slidably connected to the guide rail 604, and the sliding shell is fixedly connected to the first driving motor Machine 605, the sliding shell is used to assist the first drive motor 605 to slide on the guide rail 604, the output shaft of the first drive motor 605 is fixedly connected to the third transmission shaft 606, the upper and lower ends of the guide frame 609 are rotatably connected to the third transmission shaft 606, the two third transmission shafts 606 are fixedly connected to the third pulleys 607, the two third transmission shafts 606 are fixedly connected to the gear 608, the gear 608 is located on the left side of the third pulley 607, and the two third pulleys 607 are installed with belts, the second chassis 601 is fixedly connected to the rack 610, the rack 610 is located below the gear 608, the gear 608 is meshed with the rack 610, and the first drive motor 605 transmits power to each gear 608 through the third transmission shaft 606 and the third pulley 607 on the upper side.

[0048] After the battery core welding is completed, the transmission assembly transfers the battery core bracket 100 to the second receiving plate 602 and the third receiving plate 603, and starts the first driving motor 605. The first driving motor 605 drives the third transmission shaft 606 and the third pulley 607 on the upper side to rotate through the output shaft. The third pulley 607 on the upper side drives the third pulley 607 on the lower side to rotate through the belt. The third pulley 607 on the lower side drives the third transmission shaft 606 on the lower side to rotate. The two third transmission shafts 606 drive the gear 608 to rotate. The wheel 608 moves to the right by meshing with the rack 610, and the gear 608 drives the guide frame 609 to move to the right through the third transmission shaft 606. The guide frame 609 maintains balance through the four cross bars designed in the second chassis 601. When the guide frame 609 moves to the right, since the rack 610 is in a fixed state, the gear 608 will be forced to drive the first drive motor 605 to move when it is meshed with the rack 610. The first drive motor 605 is forced to slide synchronously to the right along the track on the guide rail 604 through the sliding shell.

[0049] The laminating mechanism 6 further includes a balancing bar 611, a guide bracket 612, an adsorption plate 613 and a suction cup 614. The guide bracket 612 is symmetrically fixedly connected to the left and right end surfaces in the second chassis 601. The end surfaces of the guide bracket 612 are provided with grooves. The guide bracket 612 is M-shaped. One side of the vertical rod in the middle of the four balancing bars 611 is provided with a protruding shaft that matches the groove in the middle of the guide bracket 612. The protruding shaft on one side of the vertical rod in the middle of the four balancing bars 611 passes through the groove in the guide bracket 612 and is aligned with the guide bracket 612. It is slidably connected to the bracket 612, and the protruding axes of the four balance rods 611 pass through the grooves opened in the guide bracket 612 and then pass through the grooves opened at the vertical rods on both sides of the guide frame 609 and are slidably connected to the guide frame 609. The left and right ends of each balance rod 611 are fixedly connected with an adsorption plate 613, and four suction cups 614 for adsorbing green shell paper are provided at the bottom of the adsorption plate 613. A green shell paper storage box is provided on one side of the adsorption plate 613 along the vertical direction, and a separation suction cup unit for peeling off release paper is provided on the right side of the green shell paper storage box.

[0050] When the guide frame 609 moves to the right, the two protruding shafts in the middle of the balance bar 611 are driven by the guide frame 609 to move to the right in the vertical groove of the guide frame 609, and the balance bar 611 drives the adsorption plate 613 to slide to the right, and the protruding shaft on the upper side of the balance bar 611 slides to the right in the guide bracket 612. The guide bracket 612 is designed to be M-shaped. The protruding shaft on the upper side of the balance bar 611 contacts the inner wall of the guide bracket 612 and slides up and down along the trajectory of the guide bracket 612. When the adsorption plate 613 starts to move, the adsorption plate 613 adsorbs the green shell paper through the suction cup 614 and moves along the guide bracket 612. When the adsorption plate 613 drives the green shell paper to move to the middle of the guide bracket 612 through the suction cup 614, the other side of the green shell paper contacts the suction cup single The suction cup of the element comes into contact with the green shell paper. Since the suction cup unit releases a higher temperature through the suction cup, the release paper on the green shell paper can be more easily peeled off due to the influence of temperature. At this time, the release paper on the green shell paper is adsorbed and peeled off by the suction cup unit, and the adsorption plate 613 continues to drive the green shell paper to move along the guide bracket 612 through the suction cup 614. When the adsorption plate 613 drives the green shell paper to move to the end of the guide bracket 612 through the suction cup 614, the green shell paper is driven by the suction cup 614 to fit on the battery cell bracket 100, and then the guide bracket 609 moves to the left to drive the adsorption plate 613 and the suction cup 614 to reset. Through the design of the guide bracket 612, the adsorption plate 613 and the suction cup 614 can prevent the green shell paper from contacting other parts to cause wrinkles and deformation when the green shell paper is driven to move.

[0051] The laminating mechanism 6 also includes a second driving motor 615, a second conveyor belt 616, a discharge roller 617 and a discharge port 618. The third driving motor is fixedly connected to the middle of the right side of the second chassis 601. The output shaft of the second driving motor 615 is fixedly connected to the driving wheel. The output shaft of the second driving motor 615 is meshed with the second conveyor belt 616 through the driving wheel. The second conveyor belt 616 is located between the second receiving plate 602 and the third receiving plate 603. The top of the second conveyor belt 616 is parallel to the top of the second receiving plate 602. A discharge port 618 is opened in the middle of the right end of the second chassis 601, and a discharge roller 617 is fixedly connected to the discharge port 618.

[0052] When the green shell paper is pasted, the second drive motor 615 is started, and the output shaft of the second drive motor 615 drives the second conveyor belt 616 to move the battery cell bracket 100 to the discharge roller 617 through the driving wheel. The green shell paper pasted on the upper and lower ends of the battery cell bracket 100 is more tightly pasted after being rolled by the discharge roller 617, and then the battery cell bracket 100 is discharged through the discharge port 618.

[0053] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. An automatic spot welding machine for battery pack assembly, characterized in that: The invention comprises a first chassis (1), wherein a placement mechanism (2) for intermittent unloading of battery packs is arranged in the first chassis (1), wherein the placement mechanism (2) comprises a rotating shaft (201), a rotating sleeve (202), a placement tube (203), a guide tube (204), a protective shell (205), a battery cell inlet (206), a battery cell outlet (207), a connecting plate (208), a guide seat (209), a battery cell bracket (100) and a power unit, wherein the first chassis (1) is rotatably connected with the rotating shaft (201), the middle part of the rotating shaft (201) is fixedly connected with the rotating sleeve (202), a plurality of placement tubes (203) are fixedly connected in a circular array on the outer side of the rotating sleeve (202), and the top right part of the first chassis (1) is fixedly connected with the guide tube (204). ), a protective shell (205) matched with the placement tube (203) is fixedly connected in the notch in the middle of the top of the first chassis (1), a battery cell inlet (206) is opened on the upper left side of the protective shell (205), the battery cell inlet (206) is aligned with the bottom end of the guide tube (204), a battery cell outlet (207) is opened at the bottom end of the protective shell (205), and a connecting plate (208) that is gap-matched with one end of the placement tube (203) and fixedly connected to the placement tube (203) is arranged in the protective shell (205) with the center of the protective shell (205), and a guide seat (209) is fixedly connected in the middle upper part of the first chassis (1), the guide seat (209) is located at the lower side of the battery cell outlet (207) and is aligned with the battery cell outlet (207), and the guide seat (209) can So that the battery cell can remain in a vertical state when passing through the guide seat (209), and the battery cell can accurately fall into the battery cell bracket (100) after passing through the guide seat (209). A power unit is arranged on the first chassis (1), and the power unit is used to drive the rotating shaft (201) to move. The power unit comprises a first pulley (3), a first transmission shaft (301), a second pulley (302), a first conveyor belt (303) and a limit plate (304). The first pulley (3) is fixedly connected to the left part of the rotating shaft (201). The first transmission shaft (301) is rotatably connected to the lower part of the first chassis (1) in a forward manner. One end of the first transmission shaft (301) is located directly below the first pulley (3), and one end of the first transmission shaft (301) is fixedly connected to the second pulley (302). A belt is installed between the first pulley (3) and the second pulley (302); a rotating wheel is fixedly connected to the first transmission shaft (301); the first transmission shaft (301) is meshedly connected to the first conveyor belt (303); a limit plate (304) is fixedly connected inside the first chassis (1); the limit plate (304) is located above the first conveyor belt (303); a staff member places the battery cell bracket (100) on the first conveyor belt (303) through the feed port at the top left end of the first chassis (1); the first chassis (1) further includes a drive assembly (4), a transmission assembly (401), a first receiving plate (402) and a nickel sheet delivery box (403); the drive assembly (4) is arranged inside the first chassis (1); the transmission assembly (401) is installed on the drive assembly (4);The transmission assembly (401) is composed of a support rod and a conveyor belt. The transmission rod drives the conveyor belt to transport the battery cell bracket (100). A nickel sheet delivery box (403) is fixedly connected to the lower right portion of the first chassis (1); the nickel sheet delivery box (403) is located at the upper and lower sides of the transmission assembly (401); the nickel sheet delivery box (403) is used to place nickel sheets on the battery cell bracket (100); and a first receiving plate (402) is fixedly connected to the lower right portion of the first chassis (1).

2. An automatic spot welding machine for assembling a battery pack according to claim 1, characterized in that: The placing mechanism (2) further comprises a sorting machine (210) and a dustproof box (211); the sorting machine (210) is arranged at the left side of the top end of the first chassis (1); the dustproof box (211) is arranged at the lower right end of the sorting machine (210); and the top end of the guide tube (204) is located in the dustproof box (211).

3. The automatic spot welding machine for battery pack assembly according to claim 1, characterized in that: It also includes a telescopic cylinder (404) and a bending plate (405), wherein the telescopic cylinder (404) is fixedly connected to the upper right portion of the first chassis (1), and one end of the telescopic cylinder (404) is fixedly connected to the bending plate (405).

4. The automatic spot welding machine for assembling a battery pack according to claim 1, characterized in that: The invention also comprises a welding mechanism (5), the welding mechanism (5) comprising a support frame (501), a second transmission shaft (502), a power assembly (503), a cam (504), a sliding groove (505), a connecting shaft (506) and a rolling shaft (507); the bottom end of the support frame (501) is fixedly connected to the bottom of the front side of the first chassis (1); the second transmission shaft (502) is rotatably connected in the support frame (501); the second transmission shaft (502) passes through the left end of the support frame (501) and is connected to the power assembly (503); the power assembly (503) transmits power to the second transmission shaft (502); the second transmission shaft (502) is fixedly connected to the cam (504); the sliding groove (505) is fixedly connected in the support frame (501); the connecting shaft (506) is slidably connected in the sliding groove (505); and the connecting shaft (506) is fixedly connected to the rolling shaft (507).

5. The automatic spot welding machine for assembling a battery pack according to claim 4, characterized in that: The welding mechanism (5) further comprises a lifting frame (508), a spring (509) and a welding frame (510); the lifting frame (508) is slidably connected to the support frame (501); one end of the lifting frame (508) is fixedly connected to the connecting shaft (506); the top surface of one end of the lifting frame (508) is fixedly connected to the welding frame (510); the spring (509) is fixedly connected between the inner end surface of the lifting frame (508) and the support frame (501); and the top surface of one end of the welding frame (510) is connected to a welding gun.

6. The automatic spot welding machine for assembling a battery pack according to claim 1, characterized in that: The invention also comprises a fitting mechanism (6), which comprises a second chassis (601), a second receiving plate (602), a third receiving plate (603), a guide rail (604), a first drive motor (605), a third transmission shaft (606), a third pulley (607), a gear (608), a guide frame (609) and a rack (610); the front left side of the second chassis (601) is connected to the right end of the first chassis (1); one end of the first receiving plate (402) is respectively fixedly connected to one end of the second receiving plate (602) and one end of the third receiving plate (603); the other ends of the second receiving plate (602) and the third receiving plate (603) are fixedly connected to the right end surface of the second chassis (601); the top right end of the second chassis (601) is fixedly connected to the right end surface of the second chassis (601); A guide rail (604) is connected, a sliding housing is slidably connected inside the guide rail (604), a first drive motor (605) is fixedly connected inside the sliding housing, an output shaft of the first drive motor (605) is fixedly connected to a third transmission shaft (606), a third belt pulley (607) is fixedly connected to the third transmission shaft (606), a gear (608) is fixedly connected to the third transmission shaft (606), the gear (608) is located on the left side of the third belt pulley (607), a belt is installed on the third belt pulley (607), a guide frame (609) is rotatably connected to the third transmission shaft (606), a rack (610) is fixedly connected inside the second chassis (601), the rack (610) is located below the gear (608), and the gear (608) is meshed with the rack (610).

7. An automatic spot welding machine for assembling a battery pack according to claim 6, characterized in that: The laminating mechanism (6) further comprises a balancing rod (611), a guide bracket (612), a suction plate (613) and a suction cup (614); the guide bracket (612) is fixedly connected to an end surface on one side of the second chassis (601); grooves are provided on both side end surfaces of the guide bracket (612); a protruding shaft matching the groove provided in the guide bracket (612) is provided in the middle of the balancing rod (611); the balancing rod (611) is slidably connected to the guide bracket (612) in the groove provided in the guide bracket (612) via the protruding shaft; the left and right ends of the balancing rod (611) are fixedly connected to the suction plate (613); a suction cup (614) for adsorbing green paper is provided at the bottom of the suction plate (613); a green paper storage box is provided on one side of the suction plate (613) along the vertical direction; a separation suction cup unit for peeling off release paper is provided on the right side of the green paper storage box.

8. The automatic spot welding machine for assembling a battery pack according to claim 7, characterized in that: The laminating mechanism (6) further comprises a second driving motor (615), a second conveyor belt (616), a discharging roller (617) and a discharging port (618); the second driving motor (615) is fixedly connected to the middle of one side of the right part of the second chassis (601); the output shaft of the second driving motor (615) is fixedly connected to a driving wheel; the output shaft of the second driving motor (615) is meshingly connected to the second conveyor belt (616) via the driving wheel; a discharging port (618) is provided in the middle of the right end of the second chassis (601); and the discharging roller (617) is fixedly connected to the inside of the discharging port (618).

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