A battery pack flip welding tool

Abstract

The present invention relates to the field of welding technology, and specifically to a battery pack flip welding tool, comprising an operating table, a laser welder and a pole piece loader, and also comprising a feeding mechanism arranged on the operating table for batch automatic feeding of square shell batteries, the feeding mechanism being provided with a fixing mechanism for adaptively clamping and fixing the square shell batteries by the gravity of the square shell batteries, the present invention adopts an adjustment plate, a linkage carrier plate and a support seat to work together to achieve batch automatic and precise feeding of square shell batteries, utilizes the pressure plate member and the transmission assembly in the fixing mechanism, and pushes the pressure plate member downward by the dead weight of the battery, triggering the automatic clamping of the symmetrically arranged battery clamps, thereby significantly improving the efficiency of batch loading and unloading, and the present invention adopts the front and rear fine-tuning of the adjustment plate to the rotation point position of the linkage carrier plate to adapt to the feeding path of square shell batteries of different specifications, thereby greatly improving the versatility of the tool.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and in particular to a battery pack flip welding tool. Background Art

[0002] With the rapid development of new energy vehicles and energy storage technologies, battery packs, as core energy carriers, have attracted much attention for the precision and efficiency of their manufacturing processes. Square-shell batteries are widely used in battery packs due to their compact structure and high energy density. During the manufacturing process of square-shell batteries, pole pieces need to be welded on their positive and negative contacts to achieve reliable connection between battery cells. This welding process has a decisive influence on the conductivity, safety and life of the battery, and therefore places high demands on the positioning accuracy and automation level of the welding tooling.

[0003] At present, the welding tooling commonly used in the industry is mainly composed of an operating table, a laser welder and a pole piece loader. The specific operating process is: the operator manually places the square shell battery on the specified position of the operating table, and adjusts its posture by hand to achieve the alignment and fixation of the contacts. Then, the pole piece loader transfers the cut pole piece to the contact surface, and the laser welder completes the single-sided welding. After completing the welding of one contact, the square shell battery needs to be manually turned over, the contact on the other side is re-aligned, and the above welding steps are repeated. In this process, the loading and unloading, flipping and fixing of the battery all rely on manual operation, and the pole piece loader and laser welder can only achieve partial automation.

[0004] However, the above-mentioned welding tooling has significant defects: first, manual loading and unloading efficiency is low, and poor consistency is easily caused by operator fatigue; second, when the battery is manually flipped and realigned, the contact position is easily offset, affecting the welding accuracy and even causing poor welding or misalignment of the electrode pieces; third, the method of holding the square shell battery is difficult to ensure clamping stability, especially in mass production, where a slight displacement of the battery may lead to batch defects.

[0005] Although some manufacturers currently use fixtures to position batteries, each fixture can only clamp one battery. During operation, the fixture needs to be frequently adjusted to release the clamp of the welded battery and clamp the next battery to be welded. The operation is cumbersome and affects the overall efficiency. If multiple batteries are clamped at one time using multiple fixtures, there is no need to adjust the fixtures frequently, but the fixtures need to be driven separately, which is costly.

[0006] In addition, when welding the electrode, it is easy for the electrode to not fit completely with the battery, resulting in the electrode being higher in the middle and lower around, affecting the welding quality. Moreover, since the electrode is thin, its end is sharp after welding, which can easily scratch the staff during the subsequent transportation or packaging process, posing certain safety hazards. Summary of the Invention

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a battery pack flip welding tool, including an operating table, a laser welder and a pole piece loader, and also including a feeding mechanism arranged on the operating table for batch automatic feeding of square shell batteries, and the feeding mechanism is provided with a fixing mechanism for fixing the square shell batteries through gravity-adaptive clamping of the square shell batteries.

[0008] The feeding mechanism includes an adjustment plate that is slidably arranged on the operating table. A linkage carrier plate is rotatably arranged on the upper side of the adjustment plate. A bearing seat is slidably arranged on the upper side of the linkage carrier plate along the length direction of the adjustment plate. The moving direction of the bearing seat is perpendicular to the moving direction of the adjustment plate.

[0009] The fixing mechanism includes a pressure plate member that is slidably arranged on the upper side of the supporting seat. Two symmetrically arranged battery clamps are provided on the supporting seat through a transmission assembly. The pressure plate member is provided with a number of equidistant blocks that are slidably arranged along its length at equal intervals.

[0010] A fixing bracket is fixedly installed on the upper side of the operating table, and a vertical rod is slidably provided on the fixing bracket along the vertical direction.

[0011] A supporting plate is provided on the lower side of the vertical rod for sliding back and forth, and a yielding groove is provided on the front part of the supporting plate.

[0012] The front side of the supporting plate is elastically slidably provided with two sliding blocks arranged symmetrically on the left and right. A pressure roller is rotatably provided between the two sliding blocks, and two bending rings arranged symmetrically on the left and right are fixedly installed on the outside of the pressure roller.

[0013] Place the square shell batteries one by one on the right side of the equidistant block. The gravity of the square shell batteries pushes the pressure plate, which drives the battery clamps to clamp on both sides of the square shell battery through the transmission assembly. Push one of the equidistant blocks by hand to clamp all the square shell batteries on the pressure plate.

[0014] Preferably, a driven gear is fixedly installed at the lower end of the linkage carrier plate, a synchronous motor is fixedly installed at the lower side of the adjustment plate, a driving gear is fixedly installed on the output shaft of the synchronous motor, the driving gear is meshed with the driven gear, and an adjusting screw threadedly connected to the adjustment plate is rotatably provided on the operating table.

[0015] Preferably, the transmission assembly includes four hinged plates arranged in a matrix and hinged on the upper side of the support seat, the upper ends of the two hinged plates at the corresponding left and right positions are hinged to the battery clamps at the corresponding positions, and the two hinged plates at the corresponding front and rear positions are hinged to the same place of the pressure plate through a linkage rod.

[0016] Preferably, a coil spring is arranged between the pressure plate and the supporting seat, the pressure plate is in an L-shaped structure, a wedge is provided on the side of the supporting seat away from the vertical section of the pressure plate, and slides along the length direction of the supporting seat, and a one-way screw is provided inside the supporting seat for rotation, which is threadedly connected to the wedge.

[0017] Preferably, a positioning block is provided inside the pressure plate member and on the left side of each equidistant stop block so as to slide along the length direction of the pressure plate member. A connecting rotating plate is rotatably provided on the positioning block and the equidistant stop block. Two adjacent connecting rotating plates are hinged to each other, and the connecting rotating plate closest to the vertical section of the pressure plate member is hinged to the pressure plate member.

[0018] Preferably, a limit rod is fixedly installed on the lower side of the alignment block, a rotating rod is provided to rotate along the rotation axis of the linkage carrier, a C-shaped frame is fixedly installed on the upper end of the rotating rod, and a blocking member is provided on the upper side of the horizontal section of the C-shaped frame to slide along its length direction.

[0019] Preferably, the outer side of the lower end of the rotating rod is connected to a transmission gear through a ratchet structure, and a support frame plate is rotatably set at the lower end of the rotating rod. The support frame plate is connected to the operating table for sliding back and forth, and a rack engaged with the transmission gear is set on the upper side of the support frame plate for sliding left and right, and a push spring is set between the rack and the support frame plate.

[0020] Preferably, the laser welder is fixedly connected to the fixing bracket, and the vertical rod is fixedly connected to the fixing bracket via a locking screw.

[0021] Preferably, a driving cylinder is fixedly mounted on the rear side of the supporting plate, and a telescopic section of the driving cylinder is fixedly connected to the vertical rod.

[0022] Preferably, return springs are provided between the upper and lower sides of the slider and the supporting plate.

[0023] The beneficial effects of the present invention are: 1. The present invention adopts the coordinated action of the adjustment plate, linkage carrier plate and bearing seat in the feeding mechanism, and realizes the automatic and precise batch feeding of square shell batteries through the forward and backward sliding of the adjustment plate and the rotation of the linkage carrier plate, combined with the radial sliding of the bearing seat. The pressure plate and transmission assembly in the fixing mechanism are used to push the pressure plate downward through the weight of the battery, triggering the automatic clamping of the symmetrically arranged battery clamps, significantly improving the efficiency of batch loading and unloading, and eliminating the clamping offset caused by manual operation.

[0024] Second, the present invention uses an adjustment plate to fine-tune the front and rear linkage of the carrier plate's rotation point position, adapting to the feeding paths of square-shell batteries of different specifications, greatly improving the versatility of the tooling. Furthermore, the sliding connection structure of the equidistant abutment block and the alignment block, combined with the hinged linkage of the connecting rotating plate, can achieve synchronous alignment of the alignment block and the square-shell battery. The limit rod and the blocking member on the U-shaped frame cooperate to limit the position, ensuring the position accuracy of the square-shell battery in transmission and ensuring welding consistency.

[0025] 3. The present invention adopts a synchronous transmission design of the hinged plate and linkage rod of the transmission assembly to convert the vertical displacement of the pressure plate into a symmetrical clamping action of the battery clamp. At the same time, the wedge-shaped member can automatically push and block an equidistant block farthest from the vertical section of the pressure plate, thereby achieving automatic clamping and corresponding locking of all square-shell batteries, simplifying the operation steps.

[0026] 4. The present invention adopts a vertical rod on a fixed bracket and a supporting plate controlled by a driving cylinder to achieve secondary positioning of the square shell battery during welding. At the same time, with the elastic pressing structure of the slider and the pressure roller, it can also achieve the abutment of the lower side of the electrode and the leveling of its upper side. By bending and pressing the edge of the electrode by the bending ring, it can also prevent the edge of the electrode from being too sharp. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and examples.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention when welding square shell batteries.

[0029] Figure 2 It is a structural diagram of the operating platform, feeding mechanism and fixing mechanism in the present invention.

[0030] Figure 3 It is a cross-sectional view of the operating platform, adjustment plate, linkage carrier plate and driven gear in the present invention.

[0031] Figure 4 It is a structural schematic diagram of the adjustment plate, linkage carrier plate, bearing seat and pressure plate member in the present invention.

[0032] Figure 5 It is a partial cross-sectional view of the linkage carrier plate, the bearing seat, the pressure plate and the equidistant abutment blocks in the present invention.

[0033] Figure 6 It is a cross-sectional view of the operating platform, support frame plate, rack and transmission gear in the present invention.

[0034] Figure 7 It is a partial structural diagram of the fixed bracket, vertical rod, supporting plate and pressure roller in the present invention.

[0035] Figure 8 yes Figure 7 A partial enlarged view of point A in the middle.

[0036] Figure 9 It is a structural schematic diagram of the blocking member in the present invention.

[0037] Figure: 1, operating table; 2, laser welder; 3, electrode loader; 4, feeding mechanism; 5, fixing mechanism; 11, fixing bracket; 41, adjustment plate; 42, linkage carrier; 43, bearing seat; 51, pressure plate; 52, transmission assembly; 53, battery clamp; 54, equidistant block; 111, vertical rod; 112, supporting plate; 113, driving cylinder; 114, slider; 115, pressure roller; 116, bending Ring; 411, adjusting screw; 421, driven gear; 422, synchronous motor; 423, driving gear; 431, wedge; 432, one-way screw; 511, alignment block; 512, connecting rotating plate; 513, limiting rod; 514, rotating rod; 515, U-shaped frame; 516, blocking member; 517, transmission gear; 518, support frame plate; 519, rack; 521, hinged plate; 522, linkage rod. DETAILED DESCRIPTION

[0038] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0039] See Figure 1 and Figure 2 A battery pack flip welding tool includes an operating table 1, a laser welder 2 and a pole piece loader 3, and also includes a feeding mechanism 4 arranged on the operating table 1 for batch automatic feeding of square shell batteries. The feeding mechanism 4 is provided with a fixing mechanism 5 for clamping and fixing the square shell batteries through gravity adaptive clamping of the square shell batteries.

[0040] Continue reading Figure 1 and Figure 2 A fixed bracket 11 is fixedly installed on the upper side of the operating table 1, the laser welder 2 is fixedly connected to the fixed bracket 11, and the electrode loader 3 is fixedly installed on the right side of the operating table 1. In this embodiment, the electrode loader 3 adopts the existing technology and is composed of a conveying structure for conveying electrodes arranged on the front side of the right end of the operating table 1 and a discharge structure for cutting electrodes into fixed lengths arranged on the rear side of the right end of the operating table 1.

[0041] During operation, the operator places the square shell batteries in batches inside the fixing mechanism 5. The fixing mechanism 5 locks the square shell batteries with the feeding mechanism 4 through the gravity of the square shell batteries themselves. Then the electrode loader 3 transfers the cut electrodes to the contacts located directly below the laser welder 2. The electrodes are then welded to the contacts through the laser welder 2. Then the electrode loader 3 is reset, and the feeding mechanism 4 drives the square shell batteries to move automatically to the right, so that the contacts at the front of the next square shell battery correspond to those directly below the laser welder 2.

[0042] Then, the electrode loader 3 moves the electrode to the corresponding contact again, and then the laser welder 2 is used for welding. When the contacts on the front of all square shell batteries are welded with electrode pieces, the feeding mechanism 4 automatically rotates all square shell batteries so that the positions of the front and rear contacts of the square shell batteries are swapped. The above steps are repeated to complete the batch welding of square shell batteries.

[0043] See Figure 1 、 Figure 2 and Figure 3 The feeding mechanism 4 includes an adjusting plate 41 that is slidably arranged on the operating table 1. A linkage carrier plate 42 is rotatably arranged on the upper side of the adjusting plate 41. A bearing seat 43 is slidably arranged on the upper side of the linkage carrier plate 42 along the length direction of the adjusting plate 41. The moving direction of the bearing seat 43 is perpendicular to the moving direction of the adjusting plate 41.

[0044] See Figure 1 、 Figure 2 and Figure 4 The fixing mechanism 5 includes a pressure plate 51 that is slidably arranged on the upper side of the support seat 43. Two symmetrically arranged battery clamps 53 are provided on the support seat 43 through a transmission assembly 52. ​​The pressure plate 51 is provided with a number of equidistant blocks 54 that are slidably arranged along its length direction at equal intervals along its length direction.

[0045] See Figure 4 and Figure 5 A coil spring is arranged between the pressure plate 51 and the supporting seat 43. The pressure plate 51 is an L-shaped structure. A wedge-shaped piece 431 is provided on the supporting seat 43 on the side away from the vertical section of the pressure plate 51 and slides along the length direction of the supporting seat 43. A one-way screw 432 is provided inside the supporting seat 43 for rotation and is threadedly connected to the wedge-shaped piece 431.

[0046] See Figure 5 , an alignment block 511 is provided inside the pressure plate member 51 and on the left side of each equidistant stop block 54, which is slidable along the length direction of the pressure plate member 51. A connecting rotating plate 512 is rotatably provided on the alignment block 511 and the equidistant stop block 54. The two adjacent connecting rotating plates 512 are hinged to each other, and the connecting rotating plate 512 closest to the vertical section of the pressure plate member 51 is hinged to the pressure plate member 51.

[0047] In the initial state, the coil spring pushes the pressure plate 51 upward by its own elastic force, so that the pressure plate 51 drives the equidistant blocks 54 thereon to be located on the upper part of the wedge 431, and the operator manually pulls the leftmost equidistant block 54 to the left, so that the leftmost equidistant block 54 drives all the alignment blocks 511 and the equidistant blocks 54 to move to the left at equal intervals through the connecting rotating plate 512.

[0048] When welding of square shell batteries is required, the operator places the square shell batteries on the pressure plate 51 and makes the square shell batteries located to the right of the equidistant blocks 54 at the corresponding positions. All operators manually push the leftmost equidistant blocks 54 to the right, so that all the equidistant blocks 54 push the square shell batteries to be arranged at equal intervals and clamp the square shell batteries in the left and right directions. The rightmost square shell battery is clamped on the vertical section of the pressure plate 51 by the rightmost equidistant blocks 54.

[0049] Subsequently, the external force on the square shell battery is removed, so that the square shell battery pushes the pressure plate 51 downward under the action of gravity, and the pressure plate 51 drives the alignment block 511 and the equidistant block 54 thereon to move downward synchronously, so that the leftmost equidistant block 54 contacts the wedge 431, and then the leftmost equidistant block 54 moves down to the right part of the wedge 431, so that the wedge 431 faces the leftmost equidistant block 54 through its right side to abut and block it, ensuring that the equidistant block 54 is locked and limited to the square shell battery.

[0050] In this embodiment, the operator can drive the wedge 431 to adjust its position left and right by rotating the one-way screw 432 in advance, so as to adapt to the abutment and fixation of square shell batteries of different thickness specifications.

[0051] See Figure 1 、 Figure 2 and Figure 4 The transmission assembly 52 includes four hinged plates 521 arranged in a matrix and hinged on the upper side of the supporting seat 43. The upper ends of the two hinged plates 521 at the corresponding left and right positions are hinged to the battery clamp 53 at the corresponding position, and the two hinged plates 521 at the corresponding front and rear positions are hinged to the same point of the pressure plate 51 through a linkage rod 522.

[0052] It should be noted that a sliding plate (not shown in the figure) is fixedly installed on one of the battery clamps 53, the length direction of the sliding plate is perpendicular to the length direction of the battery clamp 53, and the sliding plate is slidably connected to the other battery clamp 53 along the thickness direction, so that the two battery clamps 53 are arranged parallel to each other through the connection of the sliding plate.

[0053] In the initial state, the two battery clamps 53 are in a position away from each other. When the pressure plate 51 moves downward, the pressure plate 51 pushes the lower end of the hinge plate 521 away from the pressure plate 51 through the linkage rod 522, so that the upper end of the hinge plate 521 drives the battery clamp 53 to clamp against the square shell battery, thereby clamping and aligning the square shell battery front and back while pushing the square shell battery to the middle position of the pressure plate 51, so that the square shell battery is symmetrically arranged relative to the rotation axis of the linkage carrier 42, so that after the square shell battery is rotated, the positions of the front and rear contacts of the square shell battery are swapped.

[0054] See Figure 3An adjusting screw 411 which is threadably connected to the adjusting plate 41 is rotatably provided on the operating table 1 .

[0055] It should be noted that when welding square-shell batteries of different widths, after the battery clamp 53 is clamped against the square-shell battery, the operator manually turns the adjusting screw 411 so that the adjusting screw 411 drives the linkage carrier 42 to fine-tune its position forward and backward through the adjusting plate 41. The linkage carrier 42 drives the square-shell battery to move synchronously with the pressure plate 51 through the supporting seat 43, so that after the square-shell batteries of different widths are clamped and fixed by the battery clamp 53, the contacts on the front of the square-shell battery can all correspond to the lower part of the laser welder 2.

[0056] See Figure 2 、 Figure 3 、 Figure 5 and Figure 9 A limiting rod 513 is fixedly installed on the lower side of the alignment block 511, and a rotating rod 514 is provided to rotate along the rotation axis position of the linkage carrier 42. A U-shaped frame 515 is fixedly installed on the upper end of the rotating rod 514, and a blocking member 516 is provided on the upper side of the horizontal section of the U-shaped frame 515 to slide along its length direction.

[0057] It should be noted that if Figure 5 and Figure 9 As shown, a semicircular through groove with the same diameter as the rotating rod 514 is provided on both sides of the left and right sides of the blocking member 516, and when one side of the blocking member 516 abuts against the vertical section of the U-shaped frame 515, the semicircular through groove on the other side of the blocking member 516 is arranged coaxially with the rotating rod 514.

[0058] In this embodiment, a screw rod is rotatably provided on the linkage carrier plate 42 , the screw rod is threadedly connected to the bearing seat 43 , and a servo motor for driving the screw rod to rotate is fixedly mounted on the linkage carrier plate 42 .

[0059] When the equidistant blocks 54 clamp the square shell batteries, all square shell batteries except the rightmost one are located between two adjacent equidistant blocks 54. Since all the equidistant blocks 54 and the alignment blocks 511 are arranged at equal intervals, the alignment blocks 511 between the two adjacent equidistant blocks 54 correspond to the center positions of the square shell batteries at corresponding positions, so that the limiting rod 513 is located directly below the center positions of the square shell batteries at corresponding positions.

[0060] When the contact point at the front of the square shell battery corresponds to the position of the laser welder 2, the servo motor is started to drive the supporting seat 43 to move to the right through the screw rod. The supporting seat 43 drives the rightmost limiting rod 513 to move to the right first until it rests on the semicircular groove of the blocking member 516, and pushes one side of the blocking member 516 to rest on the vertical section of the U-shaped frame 515, so that the rightmost limiting rod 513 is arranged coaxially with the rotating rod 514, so that the contact point at the front of the rightmost square shell battery is now directly below the laser welder 2.

[0061] It should be noted that the rotation axis of the linkage carrier 42 is located at the rear of the laser welder 2, so that the rotating rod 514 is arranged in front and behind the laser welder 2. After adjusting the adjusting screw 411, the contacts on the front of the square shell battery can all correspond to the lower part of the laser welder 2, that is, all the contacts on the front of the square shell battery are located in the same vertical plane as the laser welder 2, so that when the rightmost limit rod 513 and the rotating rod 514 are arranged coaxially, the contact on the front of the rightmost square shell battery is located directly below the laser welder 2.

[0062] See Figure 1 、 Figure 7 and Figure 8 A vertical rod 111 is provided on the fixed bracket 11 for sliding in the vertical direction. The vertical rod 111 is fixedly connected to the fixed bracket 11 through a locking screw. A supporting plate 112 is provided on the lower side of the vertical rod 111 for sliding back and forth. A driving cylinder 113 is fixedly installed on the rear side of the supporting plate 112. The telescopic section of the driving cylinder 113 is fixedly connected to the vertical rod 111, and a clearance groove is provided at the front of the supporting plate 112.

[0063] Continue reading Figure 1 、 Figure 7 and Figure 8 Two symmetrically arranged sliders 114 are provided on the front side of the supporting plate 112 for sliding up and down. A pressure roller 115 is rotatably provided between the two sliders 114. Two symmetrically arranged bending rings 116 are fixedly installed on the outside of the pressure roller 115. Restoring springs are provided between the upper and lower sides of the slider 114 and the supporting plate 112.

[0064] When the contact at the front of the rightmost square shell battery moves to just below the laser welder 2, the telescopic section of the contraction drive cylinder 113 drives the supporting plate 112 to move forward, so that the supporting plate 112 moves to the upper part of the rightmost square shell battery, and the contact of the rightmost square shell battery is located inside the makeshift groove of the supporting plate 112. The supporting plate 112 fills the space between the lower part of the contact of the square shell battery and the square shell battery, preventing the electrode from being higher in the middle and lower around when being welded to the contact.

[0065] When the supporting plate 112 moves forward, it drives the pressure roller 115 thereon to move forward synchronously. When the pressure roller 115 contacts the square-shell battery, the square-shell battery pushes the pressure roller 115 upward, so that the pressure roller 115 drives the two sliders 114 to move upward synchronously until the pressure roller 115 moves to the front of the square-shell battery. Then the return spring pushes the two sliders 114 through its own elastic force, and the two sliders 114 drive the pressure roller 115 to return to the middle position of the supporting plate 112.

[0066] See Figure 3 、 Figure 5 and Figure 6 The outer side of the lower end of the rotating rod 514 is connected to the transmission gear 517 through a ratchet structure, and a support frame plate 518 is rotatably set at the lower end of the rotating rod 514. The support frame plate 518 is connected to the operating table 1 for sliding back and forth. A rack 519 is set on the upper side of the support frame plate 518 for sliding left and right and engaging with the transmission gear 517. A push spring is set between the rack 519 and the support frame plate 518.

[0067] It should be noted that the ratchet structure includes a ratchet fixedly mounted on the outer side of the lower end of the rotating rod 514, and a pawl hinged to the inside of the transmission gear 517 at equal intervals along the circumference. Through the one-way transmission cooperation of the ratchet and pawl, when the rack 519 moves to the left, it will not drive the rotating rod 514 to rotate through the transmission gear 517, and when the rack 519 moves to the right, it drives the rotating rod 514 to rotate half a circle.

[0068] After the supporting plate 112 moves to the upper part of the square shell battery, the electrode is moved to the left to the bottom of the laser welder 2 by the electrode loader 3, and the electrode is placed on the contact of the square shell battery at the corresponding position, and then the electrode is welded to the contact by the laser welder 2.

[0069] It should be noted that a pushing square rod is fixedly installed at the lower part of the conveying structure of the electrode loader 3 and moves synchronously with it. A fixed plate for being pushed by the pushing square rod is fixedly installed on the rack 519. In the process of the electrode loader 3 moving to the left, the electrode loader 3 pushes the fixed plate to the left by pushing the square rod, so that the fixed plate drives the rack 519 to move synchronously, thereby compressing the pushing spring, but not rotating the rotating rod 514.

[0070] After welding, the electrode loader 3 moves to the right and resets, and the push spring pushes the rack 519 to the right by its own elastic force. At this time, the rack 519 drives the transmission gear 517 to rotate, and the transmission gear 517 drives the rotating rod 514 to rotate half a circle, so that the rotating rod 514 drives the blocking member 516 through the U-shaped frame 515 to rotate half a circle with the limiting rod 513 resting thereon as the axis, so that the blocking member 516 rotates from the right part of the rightmost limiting rod 513 to the left part of the rightmost limiting rod 513, and then the blocking member 516 no longer blocks the rightmost limiting rod 513, and at the same time enables the blocking member 516 to block the second limiting rod 513 from right to left, thereby ensuring the transmission accuracy of the square shell battery.

[0071] Then the telescopic section of the driving cylinder 113 is extended to drive the supporting plate 112 to move backward, so that the supporting plate 112 drives the pressure roller 115 to move to the upper part of the pole piece, thereby pushing the pressure roller 115 to roll the pole piece flat through the elastic force of the upper return spring, and the pressure roller 115 can fold the corresponding edge of the pole piece through the two bending rings 116 thereon to prevent the edge of the pole piece from being too sharp.

[0072] Then move the square shell battery to the right again until the second limit rod 513 from right to left is pressed against the semicircular groove of the blocking member 516. During this process, the limit rod 513 pushes the blocking member 516 to slide on the U-shaped frame 515, so that the blocking member 516 rests on the vertical section of the U-shaped frame 515, and extends the supporting plate 112 again. Then, the electrode loader 3 is used to move the electrode for welding again, and the above steps are repeated until the contacts on the front of all square shell batteries are welded. At this time, the contact on the front of the leftmost square shell battery is located directly below the laser welder 2.

[0073] See Figure 2 and Figure 3 A driven gear 421 is fixedly mounted on the lower end of the linkage carrier plate 42, a synchronous motor 422 is fixedly mounted on the lower side of the adjustment plate 41, and a driving gear 423 is fixedly mounted on the output shaft of the synchronous motor 422, and the driving gear 423 is meshed with the driven gear 421.

[0074] It should be noted that the lower portion of the linkage carrier plate 42 is a tubular structure, and the driven gear 421 is fixedly mounted on the lower end of the outer side of the tubular structure of the linkage carrier plate 42 .

[0075] When the contacts at the front of all square-shell batteries are welded, the synchronous motor 422 is started to drive the driven gear 421 to rotate half a circle through the driving gear 423. The driven gear 421 drives all square-shell batteries to rotate half a circle through the linkage carrier 42, causing the square-shell battery originally located on the far right to rotate to the far left, and the square-shell battery originally located on the far left to flip half a circle in place with its own center position as the axis, so that the contacts of the square-shell battery originally located on the far left that have no electrode sheets welded to them are moved to directly below the laser welder 2.

[0076] Then the electrode loader 3 moves the electrode to the left to just below the laser welder 2, and places the electrode on the contact of the square shell battery at the corresponding position. The electrode is then welded to the contact by the laser welder 2, and the servo motor is reversed. The principle is the same as above, so that the electrode is welded to the two contacts of the square shell battery.

[0077] See Figures 1 to 9 When welding two contacts on a square shell battery, the present invention further includes the following steps: In the first step, the operator places the square shell battery on the pressure plate 51 and manually pushes the leftmost equidistant block 54 to the right, so that the equidistant block 54 clamps the square shell battery in the left and right directions.

[0078] In the second step, the external force on the square shell battery is removed, so that the square shell battery pushes the pressure plate 51 downward under the action of gravity, and the wedge-shaped member 431 uses its right side to abut against the equidistant block 54 on the far left to block, and the pressure plate 51 drives the battery clamp 53 to clamp against the square shell battery.

[0079] In the third step, the servo motor is started to drive the contact point at the front of the rightmost square-shell battery through the screw rod to be located directly below the laser welder 2, and the telescopic section of the retracted drive cylinder 113 drives the pressure roller 115 to move to the front of the square-shell battery through the supporting plate 112.

[0080] In the fourth step, the electrode loader 3 is used to move the electrode to the left to the bottom of the laser welder 2, and the electrode is placed on the contact of the square shell battery at the corresponding position. The electrode is then welded to the contact by the laser welder 2. The electrode loader 3 is moved to the right and reset, and the push spring pushes the rack 519 to the right through its own elastic force, so that the blocking member 516 rotates half a circle with the limiting rod 513 resting on it as the axis.

[0081] In the fifth step, the telescopic section of the driving cylinder 113 is extended to drive the supporting plate 112 to move backward, so that the elastic force of the return spring pushes the pressure roller 115 to roll the pole piece flat, and the pressure roller 115 can fold the corresponding edge of the pole piece through the two bending rings 116 thereon to prevent the edge of the pole piece from being too sharp.

[0082] In the sixth step, the square shell battery is moved to the right again until the second limit rod 513 from right to left is pressed against the inside of the semicircular groove of the blocking member 516, and the supporting plate 112 is extended again. Then, the electrode loader 3 is used to move the electrode for welding again, and the process is repeated until all the contacts on the front of the square shell battery are welded.

[0083] In the seventh step, the synchronous motor 422 is started to drive all the square shell batteries to rotate half a circle. Then the electrode loader 3 moves the electrode to the left to the bottom of the laser welder 2 and places the electrode on the contact of the square shell battery at the corresponding position. Then the electrode is welded to the contact by the laser welder 2. Then the servo motor is reversed. The principle is the same as above, so that the electrode is welded to the two contacts of the square shell battery.

[0084] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the scope of protection of the present invention.

Claims

1. A battery pack flip welding tool, including an operating table, a laser welder and a pole piece loader, characterized in that: The material further includes a feeding mechanism for automatically feeding the square shell batteries in batches, wherein the feeding mechanism is provided with a fixing mechanism for clamping and fixing the square shell batteries by adaptively clamping the square shell batteries by gravity; The feeding mechanism includes an adjustment plate that is slidably arranged on the operating table. A linkage carrier plate is rotatably arranged on the upper side of the adjustment plate. A bearing seat is slidably arranged on the upper side of the linkage carrier plate along the length direction of the adjustment plate. The moving direction of the bearing seat is perpendicular to the moving direction of the adjustment plate. The fixing mechanism includes a pressure plate elastically slidingly arranged on the upper side of the supporting base, and two symmetrically arranged battery clamps are arranged on the supporting base through a transmission assembly. The pressure plate is provided with a number of equally spaced abutments slidably arranged along its length at equal intervals along its length. A fixed bracket is installed on the upper side of the operating table, and a vertical rod is provided on the fixed bracket to slide in the vertical direction; A supporting plate is provided on the lower side of the vertical rod for sliding back and forth, and a recess is provided on the front of the supporting plate; The front side of the supporting plate is elastically slidably provided with two sliding blocks which are arranged symmetrically on the left and right. A pressure roller is rotatably provided between the two sliding blocks. Two bending rings which are arranged symmetrically on the left and right are installed on the outside of the pressure roller.

2. The battery pack flip welding tool according to claim 1, characterized in that: A driven gear is fixedly installed at the lower end of the linkage carrier plate, a synchronous motor is fixedly installed at the lower side of the adjustment plate, a driving gear is fixedly installed on the output shaft of the synchronous motor, the driving gear is meshed with the driven gear, and an adjusting screw threadedly connected to the adjustment plate is rotatably provided on the operating table.

3. The battery pack flip welding tool according to claim 1, characterized in that: The transmission assembly includes four hinged plates arranged in a matrix and hinged on the upper side of the supporting seat. The upper ends of the two hinged plates at the corresponding left and right positions are hinged to the battery clamps at the corresponding positions, and the two hinged plates at the corresponding front and rear positions are hinged to the same point of the pressure plate through a linkage rod.

4. The battery pack flip welding tool according to claim 1, characterized in that: A wedge-shaped piece is provided on the side of the bearing seat away from the vertical section of the pressure plate and slides along the length direction of the bearing seat. A one-way screw is rotatably provided inside the bearing seat and is threadedly connected to the wedge-shaped piece. A coil spring is provided between the pressure plate and the bearing seat, and the pressure plate is in an L-shaped structure.

5. The battery pack flip welding tool according to claim 1, characterized in that: A positioning block is provided inside the pressure plate and on the left side of each equidistant block, which is slidable along the length direction of the pressure plate. A connecting rotating plate is rotatably provided on the positioning block and the equidistant block. Two adjacent connecting rotating plates are hinged to each other, and the connecting rotating plate closest to the vertical section of the pressure plate is hinged to the pressure plate.

6. The battery pack flip welding tool according to claim 5, characterized in that: A limiting rod is fixedly installed on the lower side of the alignment block, and a rotating rod is provided to rotate along the rotation axis position of the linkage carrier plate. A U-shaped frame is fixedly installed on the upper end of the rotating rod, and a blocking member is provided on the upper side of the horizontal section of the U-shaped frame to slide along its length direction.

7. The battery pack flip welding tool according to claim 6, characterized in that: The outer side of the lower end of the rotating rod is connected to a transmission gear through a ratchet structure, and a support frame plate is rotatably set at the lower end of the rotating rod. The support frame plate is connected to the operating table for sliding back and forth, and a rack engaged with the transmission gear is set on the upper side of the support frame plate for sliding left and right, and a push spring is set between the rack and the support frame plate.

8. The battery pack flip welding tool according to claim 1, characterized in that: The laser welder is fixedly connected to the fixing bracket, and the vertical rod is fixedly connected to the fixing bracket through a locking screw.

9. The battery pack flip welding tool according to claim 1, characterized in that: A driving cylinder is fixedly installed on the rear side of the supporting plate, and the telescopic section of the driving cylinder is fixedly connected to the vertical rod.

10. The battery pack flip welding tool according to claim 1, characterized in that: Restoring springs are provided between the upper and lower sides of the slider and the supporting plate.

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