Battery pack overturning and welding tool

Abstract

The invention relates to the technical field of welding, in particular to a battery pack overturning and welding tool which comprises an operation table, a laser welding device and a pole piece feeding machine and further comprises a feeding mechanism arranged on the operation table and used for automatically feeding square shell batteries in batches. According to the automatic feeding device for the square-shell batteries, the adjusting plate, the linkage carrying plate and the bearing base act cooperatively, batched automatic accurate feeding of the square-shell batteries is achieved, a pressing plate piece and a transmission assembly in the fixing mechanism are utilized, the pressing plate piece is pushed to move downwards through the dead weight of the batteries, and therefore the square-shell batteries can be clamped and fixed in a self-adaptive mode. And in addition, the position of the rotating point of the linkage carrier plate is finely adjusted front and back through the adjusting plate, feeding paths of square shell batteries of different specifications are adapted, and the universality of the tool is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and specifically to a battery pack flipping welding tooling. Background Art

[0002] With the rapid development of new energy vehicles and energy storage technologies, as the core energy carrier, the precision and efficiency of the manufacturing process of battery packs have attracted much attention. Due to their compact structure and high energy density, square shell batteries are widely used in battery packs. During the manufacturing process of square shell batteries, it is necessary to weld pole pieces on their positive and negative contacts to achieve reliable connection between battery cells. This welding process has a decisive impact on the electrical conductivity, safety, and lifespan of the battery. Therefore, higher requirements are put forward for the positioning accuracy and automation level of the welding tooling.

[0003] Currently, the welding tooling commonly used in the industry mainly consists of an operation table, a laser welder, and a pole piece feeding mechanism. The specific operation process is as follows: The operator manually places the square shell battery at the designated position on the operation table and holds it to adjust its posture to achieve the alignment and fixation of the contacts. Subsequently, the pole piece feeding machine transfers the cut pole pieces to the surface of the contacts, and the laser welder completes the single-sided welding. After completing the welding of one contact, it is necessary for the operator to manually flip the square shell battery, realign the other side contact, and repeat the above welding steps. During this process, the loading, unloading, flipping, and fixing of the battery all rely on manual operations, and the pole piece feeding machine and the laser welder can only achieve partial automation.

[0004] However, the above-mentioned welding tooling has significant defects: Firstly, the manual loading and unloading efficiency is low, and the consistency is poor due to operation fatigue. Secondly, when the operator flips the battery and realigns it, the position of the contacts is prone to shift, affecting the welding accuracy and even causing virtual welding or misalignment of the pole pieces. Thirdly, the method of holding and fixing the square shell battery by hand is difficult to ensure the clamping stability. Especially in mass production, slight displacement of the battery may lead to batch defects.

[0005] Although some manufacturers currently choose fixtures to position the battery, each fixture can only clamp one battery. During operation, it is necessary to frequently adjust the fixture to release the clamping of the welded battery and clamp the next battery to be welded, which is cumbersome and affects the overall efficiency. If multiple batteries are clamped at once through multiple fixtures, there is no need to frequently adjust the fixtures, but the fixtures need to be driven separately, resulting in a high cost.

[0006] In addition, when welding the pole pieces, there is an easy problem that the pole pieces cannot be completely attached to the battery, resulting in the state that the pole pieces are high in the middle and low around, affecting the welding quality. Moreover, since the pole pieces are relatively thin, their ends are relatively sharp after welding, which is likely to scratch the staff during subsequent conveying or packaging processes, posing a certain safety hazard. 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] III. The present invention adopts a synchronous transmission design of the hinge plate and the linkage rod of the transmission assembly, converting the vertical displacement of the pressing plate member into a symmetric clamping action of the battery clamping plate. At the same time, the wedge member can automatically push and block an equidistant abutting block that is farthest from the vertical section of the pressing plate member, thereby realizing automatic clamping and corresponding locking of all square shell batteries and simplifying the operation steps.

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

[0027] The present invention will be further described below in conjunction with the drawings and embodiments.

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

[0029] Figure 2 is a schematic diagram of the structure of the operating table, feeding mechanism and fixing mechanism in the present invention.

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

[0031] Figure 4 is a schematic diagram of the structure of the adjusting plate, linkage carrier plate, bearing seat and pressing plate member in the present invention.

[0032] Figure 5 is a partial cross-sectional view of the linkage carrier plate, bearing seat, pressing plate member and equidistant abutting block in the present invention.

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

[0034] Figure 7 is a partial structure schematic diagram of the fixed bracket, vertical rod, supporting plate member and pressing roller in the present invention.

[0035] Figure 8 is Figure 7 a partial enlarged view of part A in

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

[0037] In the figure: 1, operating platform; 2, laser welder; 3, pole piece loader; 4, feeding mechanism; 5, fixing mechanism; 11, fixing bracket; 41, adjusting plate; 42, linkage carrier plate; 43, bearing seat; 51, pressing plate part; 52, transmission component; 53, battery clamping plate; 54, equidistant abutting block; 111, vertical rod; 112, supporting plate part; 113, driving cylinder; 114, slider; 115, pressing roller; 116, bending ring part; 411, adjusting screw; 421, driven gear; 422, synchronous motor; 423, driving gear; 431, wedge part; 432, one-way screw; 511, alignment block; 512, connecting rotating plate; 513, limiting rod; 514, rotating rod; 515, U-shaped frame; 516, blocking part; 517, transmission gear; 518, support plate; 519, rack; 521, hinged plate; 522, linkage rod. Detailed implementation mode

[0038] The embodiments of the present invention will be described in detail below. The embodiments described below are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention. For those not specified in the embodiments, the techniques or conditions described in the literature in this field or according to the product instructions are followed.

[0039] Refer to Figure 1 and Figure 2 A battery pack flipping and welding tooling, including an operating platform 1, a laser welder 2 and a pole piece loader 3, further includes a feeding mechanism 4 arranged on the operating platform 1 for batch automatic feeding of square shell batteries, and a fixing mechanism 5 for adaptively clamping and fixing square shell batteries by the gravity of the square shell batteries is arranged on the feeding mechanism 4.

[0040] Continue to refer to Figure 1 and Figure 2 On the upper side of the operating platform 1, a fixing bracket 11 is fixedly installed, the laser welder 2 is fixedly connected to the fixing bracket 11, and the pole piece loader 3 is fixedly installed on the right side of the operating platform 1. In this embodiment, the pole piece loader 3 adopts the prior art and is composed of a conveying structure for conveying pole pieces arranged on the front side of the right end of the operating platform 1 and a sheet discharging structure for lengthwise cutting pole pieces arranged on the rear side of the right end of the operating platform 1.

[0041] During operation, the operator places a batch of square shell batteries inside the fixing mechanism 5, and the fixing mechanism 5 locks it with the feeding mechanism 4 by the gravity of the square shell battery itself. Subsequently, the pole piece loader 3 transfers the cut pole pieces to the contacts directly below the laser welder 2, and then the pole pieces are welded to the contacts by the laser welder 2. Then, the pole piece loader 3 resets, and at the same time, the feeding mechanism 4 drives the square shell battery to automatically move to the right, so that the contacts in the front of the next square shell battery are corresponding to directly below the laser welder 2.

[0042] Subsequently, the pole piece is moved to the corresponding contact by the pole piece loader 3 again, and then welded by the laser welder 2. When the contacts at the front of all the square shell batteries are welded with pole pieces, the feeding mechanism 4 automatically rotates all the square shell batteries so that the positions of the contacts on the front and back sides of the square shell batteries are swapped, and the above steps are repeated to complete the batch welding of the square shell batteries.

[0043] Refer to Figure 1 、 Figure 2 and Figure 3 , the feeding mechanism 4 includes an adjusting plate 41 slidably arranged on the operating table 1 in the front-back direction. 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] Refer to Figure 1 、 Figure 2 and Figure 4 , the fixing mechanism 5 includes a pressing plate member 51 slidably arranged on the upper side of the bearing seat 43 in the up-down direction. Two symmetrically arranged battery clamping plates 53 are arranged on the bearing seat 43 through a transmission assembly 52. A plurality of equally spaced abutting blocks 54 slidably arranged along the length direction of the pressing plate member 51 are arranged at equal intervals along the length direction of the pressing plate member 51.

[0045] Refer to Figure 4 and Figure 5 , a spiral spring is arranged between the pressing plate member 5l and the bearing seat 43. The pressing plate member 51 has an L-shaped structure. A wedge member 431 is slidably arranged on the side of the bearing seat 43 away from the vertical section of the pressing plate member 51 along the length direction of the bearing seat 43. A one-way screw rod 432 threadedly connected to the wedge member 431 is rotatably arranged inside the bearing seat 43.

[0046] Refer to Figure 5 , a positioning block 511 is slidably arranged inside the pressing plate member 51 along the length direction of the pressing plate member 51 on the left side of each equally spaced abutting block 54. Connecting rotating plates 512 are rotatably arranged on both the positioning block 511 and the equally spaced abutting blocks 54. Two adjacent connecting rotating plates 512 are hinged to each other. One of the connecting rotating plates 512 closest to the vertical section of the pressing plate member 51 is hinged to the pressing plate member 51.

[0047] In the initial state, the spiral spring pushes the pressing plate member 51 upward through its own elastic force, so that the pressing plate member 51 drives the equally spaced abutting blocks 54 thereon to be located above the wedge member 431, and the operator manually pulls the leftmost equally spaced abutting block 54 to the left, so that the leftmost equally spaced abutting block 54 drives all the positioning blocks 511 and the equally spaced abutting blocks 54 to move leftward at equal intervals through the connecting rotating plate 512.

[0048] When welding the square shell battery is required, the operator places the square shell battery on the pressing plate member 51, and makes the square shell battery located at the right part of the equally spaced abutting blocks 54 at the corresponding positions. All operators manually push the leftmost equally spaced abutting block 54 to the right, so that all the equally spaced abutting blocks 54 push the square shell battery to be arranged at equal intervals, and clamp the square shell battery in the left-right direction. The rightmost square shell battery is clamped on the vertical section of the pressing plate member 51 by the rightmost equally spaced abutting block 54.

[0049] Subsequently, the external force on the square shell battery is removed, so that the square shell battery pushes the pressing plate member 51 downward under the action of gravity. The pressing plate member 51 drives the alignment block 511 thereon to move downward synchronously with the equally spaced abutting blocks 54, so that the leftmost equally spaced abutting block 54 contacts the wedge member 431. Subsequently, the leftmost equally spaced abutting block 54 moves downward to the right of the wedge member 431, so that the wedge member 431 abuts and blocks the leftmost equally spaced abutting block 54 through its right side surface, ensuring the locking and limiting of the equally spaced abutting blocks 54 on the square shell battery.

[0050] In this embodiment, the operator can drive the wedge member 431 to adjust its position left and right by pre-rotating the one-way screw rod 432, so as to adapt to square shell batteries of different thickness specifications for abutting and fixing.

[0051] Refer to Figure 1 、 Figure 2 and Figure 4 As shown in FIGS.

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

[0053] In the initial state, the two battery clamping plates 53 are in a position away from each other. When the pressing plate member 51 moves downward, the pressing plate member 51 pushes the lower end of the hinge plate 521 away from the pressing plate member 51 through the link rod 522, so that the upper end of the hinge plate 521 drives the battery clamping plate 53 to clamp and abut against the square shell battery. Thus, while clamping and aligning the square shell battery front and back, the square shell battery is pushed to the middle position of the pressing plate member 51, so that the square shell battery is symmetrically arranged with respect to the rotation axis of the linkage carrier plate 42, which is convenient for swapping the positions of the front and back two contacts of the square shell battery after rotating the square shell battery.

[0054] Refer to Figure 3, an adjusting screw rod 411 which is rotationally arranged on the operating table 1 and is in threaded connection with the adjusting plate 41 is provided.

[0055] It should be noted that when welding square shell batteries with different widths, after the battery clamping plate 53 clamps and abuts against the square shell battery, the operator manually rotates the adjusting screw rod 411, so that the adjusting screw rod 411 drives the linkage carrier plate 42 to finely adjust the position back and forth through the adjusting plate 41. The linkage carrier plate 42 drives the square shell battery to move synchronously through the bearing seat 43 and the pressing plate member 51, so that after the square shell batteries with different widths are clamped and fixed by the battery clamping plate 53, the contacts at the front part of the square shell battery can all correspond to the lower part of the laser welder 2.

[0056] Refer to 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, a rotating rod 514 is rotationally arranged at the position of the axis of rotation of the linkage carrier plate 42, a U-shaped frame 515 is fixedly installed at the upper end of the rotating rod 514, and a blocking member 516 is slidably arranged on the upper side of the horizontal section of the U-shaped frame 515 along its length direction.

[0057] It should be noted that as Figure 5 and Figure 9 shown, semi-circular through grooves with the same diameter as the rotating rod 514 are opened on both 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 semi-circular through groove on the other side of the blocking member 516 is coaxially arranged with the rotating rod 514.

[0058] In this embodiment, a lead screw is rotationally arranged on the linkage carrier plate 42, the lead screw is in threaded connection with the bearing seat 43, and a servo motor for driving the lead screw to rotate is fixedly installed on the linkage carrier plate 42.

[0059] When the equidistant abutting blocks 54 clamp the square shell battery, all the square shell batteries except the rightmost one are located between two adjacent equidistant abutting blocks 54. Also, because all the equidistant abutting blocks 54 are arranged at equal intervals with the alignment block 511, the alignment block 511 between two adjacent equidistant abutting blocks 54 corresponds to the center position of the square shell battery at the corresponding position, so that the limiting rod 513 is located directly below the center position of the square shell battery at the corresponding position.

[0060] When the contact at the front of the square shell battery corresponds to the position of the laser welder 2, start the servo motor to drive the carrier seat 43 to move to the right through the lead screw. The carrier seat 43 drives the rightmost limiting rod 513 to move to the right first until it abuts against the semi-circular through groove of the blocking member 516, and pushes one side of the blocking member 516 to abut against the vertical section of the U-shaped frame 515, so that the rightmost limiting rod 513 and the rotating rod 514 are coaxially arranged. Thus, the contact at the front of the rightmost square shell battery is located directly below the laser welder 2 at this time.

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

[0062] Refer to Figure 1 、 Figure 7 and Figure 8 As shown in, a vertical rod 111 is slidably arranged on the fixed bracket 11 in the vertical direction. The vertical rod 111 is fixedly connected to the fixed bracket 11 through a fastening screw. A supporting plate member 112 is slidably arranged on the lower side of the vertical rod 111 in the front and back directions. A driving cylinder 113 is fixedly installed on the rear side of the supporting plate member 112. The telescopic section of the driving cylinder 113 is fixedly connected to the vertical rod 111. A relief groove is formed in the front part of the supporting plate member 112.

[0063] Continue to refer to Figure 1 、 Figure 7 and Figure 8 As shown in, two sliders 114 arranged symmetrically left and right are slidably arranged on the front side of the supporting plate member 112 in the up and down directions. A pressure roller 115 is rotatably arranged between the two sliders 114. Two bending ring members 116 arranged symmetrically left and right are fixedly installed on the outer side of the pressure roller 115. Return springs are arranged between the upper and lower sides of the sliders 114 and the supporting plate member 112.

[0064] When the contact at the front of the rightmost square shell battery moves to directly below the laser welder 2, contract the telescopic section of the driving cylinder 113 to drive the supporting plate member 112 to move forward, so that the supporting plate member 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 relief groove of the supporting plate member 112. The space between the lower part of the contact of the square shell battery and the square shell battery is filled by the supporting plate member 112 to prevent the middle from being high and the surrounding from being low when the pole piece is welded to the contact.

[0065] When the supporting plate member 112 moves forward, it drives the pressing roller 115 thereon to move forward synchronously. When the pressing roller 115 contacts the square shell battery, the square shell battery pushes the pressing roller 115 upward, causing the pressing roller 115 to drive the two sliders 114 to move upward synchronously until the pressing 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 pressing roller 115 to return to the middle position of the supporting plate member 112.

[0066] Refer to Figure 3 , Figure 5 and Figure 6 , a transmission gear 517 is connected to the outer side of the lower end of the rotating rod 514 through a ratchet structure. A support plate 518 is rotatably arranged at the lower end of the rotating rod 514. The support plate 518 is slidably connected to the front and back of the operating table 1. A rack 519 meshing with the transmission gear 517 is slidably arranged on the left and right sides of the upper side of the support plate 518. A pushing spring is arranged between the rack 519 and the support plate 518.

[0067] It should be noted that the ratchet structure includes a ratchet fixedly installed on the outer side of the lower end of the rotating rod 514, and pawls hinged at equal intervals along the circumference of the transmission gear 517. 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 member 112 moves to the upper part of the square shell battery, the pole piece feeding machine 3 moves the pole piece to the directly below the laser welder 2 to the left and places the pole piece on the contact point of the square shell battery at the corresponding position. Subsequently, the pole piece is welded to the contact point by the laser welder 2.

[0069] It should be noted that a pushing square rod that moves synchronously therewith is fixedly installed at the lower part of the conveying structure of the pole piece feeding machine 3. A fixing plate for being pushed by the pushing square rod is fixedly installed on the rack 519. During the process of the pole piece feeding machine 3 moving to the left, the pole piece feeding machine 3 pushes the fixing plate to the left through the pushing square rod, causing the fixing plate to drive the rack 519 to move synchronously, thereby compressing the pushing spring, but not rotating the rotating rod 514.

[0070] After welding, the pole piece loader 3 moves to the right to reset, and the pushing spring pushes the rack 519 to the right through 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 to rotate half a circle around the limiting rod 513 against which it abuts through the U-shaped frame 515, so that the blocking member 516 rotates from the right side of the rightmost limiting rod 513 to the left side of the rightmost limiting rod 513, and further makes the blocking member 516 no longer block the rightmost limiting rod 513, and at the same time makes the blocking member 516 able to block the second limiting rod 513 from right to left, ensuring the transmission accuracy of the square shell battery.

[0071] Then, the telescopic section of the driving cylinder 113 extends to drive the supporting plate member 112 to move backward, so that the supporting plate member 112 drives the pressing roller 115 to move to the upper part of the pole piece, and then the elastic force of the upper return spring pushes the pressing roller 115 to roll and flatten the pole piece, and the pressing roller 115 can fold the corresponding edges of the pole piece through the two bending ring members 116 thereon, preventing the edge position of the pole piece from being too sharp.

[0072] Then, the square shell battery is moved to the right again until the second limiting rod 513 from right to left abuts tightly inside the semi-circular through groove of the blocking member 516. During this process, the limiting rod 513 pushes the blocking member 516 to slide on the U-shaped frame 515, so that the blocking member 516 abuts against the vertical section of the U-shaped frame 515. The supporting plate member 112 extends again, and then the pole piece is moved by the pole piece loader 3 to be welded again, and the above steps are repeated until all the contacts at the front of the square shell batteries are welded. At this time, the contact at the front of the leftmost square shell battery is directly below the laser welder 2.

[0073] Refer to Figure 2 and Figure 3 As shown in, a driven gear 421 is fixedly installed at the lower end of the linkage carrier plate 42, a synchronous motor 422 is fixedly installed on the lower side of the adjusting plate 41, and a driving gear 423 is fixedly installed on the output shaft of the synchronous motor 422. The driving gear 423 meshes with the driven gear 421.

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

[0075] After the contacts at the front of all the square shell batteries are welded, start the synchronous motor 422 to drive the driven gear 421 to rotate half a turn through the driving gear 423. The driven gear 421 drives all the square shell batteries to rotate half a turn through the linkage carrier plate 42, causing the square shell battery originally located at the rightmost part to rotate to the leftmost part, and the square shell battery originally located at the leftmost part to rotate half a turn in place with its own central position as the axis, so that the contact without the pole piece welded on the square shell battery originally located at the leftmost part moves to directly below the laser welder 2.

[0076] Then, the pole piece loader 3 moves the pole piece to directly below the laser welder 2 to the left and places the pole piece on the contact of the square shell battery at the corresponding position. Subsequently, the pole piece is welded to the contact by the laser welder 2. Then, reverse the servo motor, and the principle is the same as above, so as to weld the pole piece to the two contacts of the square shell battery.

[0077] Refer to Figures 1 to 9 When welding the two contacts on the square shell battery, the present invention further includes the following steps: First step, the operator places the square shell battery on the pressing plate member 51 and manually pushes the equidistant abutting block 54 at the leftmost part to the right, so that the equidistant abutting block 54 clamps the square shell battery in the left-right direction.

[0078] Second step, remove the external force on the square shell battery, so that the square shell battery pushes the pressing plate member 51 downward under the action of gravity. The wedge member 431 abuts and blocks the equidistant abutting block 54 at the leftmost part through its right side surface, and the pressing plate member 51 drives the battery clamping plate 53 to clamp and abut against the square shell battery.

[0079] Third step, start the servo motor to drive the contact at the front of the square shell battery at the rightmost part to be directly below the laser welder 2 through the lead screw, and contract the telescopic section of the driving cylinder 113 to drive the supporting plate member 112 to drive the pressing roller 115 to move to the front of the square shell battery.

[0080] Fourth step, move the pole piece to directly below the laser welder 2 to the left through the pole piece loader 3 and place the pole piece on the contact of the square shell battery at the corresponding position. Subsequently, the pole piece is welded to the contact by the laser welder 2. The pole piece loader 3 moves to the right to reset, and the pushing spring pushes the rack 519 through its own elastic force, so that the blocking member 516 rotates half a turn with the limiting rod 513 against which it abuts as the axis.

[0081] Fifth step, extend the telescopic section of the driving cylinder 113 to drive the supporting plate member 112 to move backward, so that the elastic force of the return spring pushes the pressing roller 115 to roll and flatten the pole piece, and the two bending ring members 116 on the pressing roller 115 can fold the corresponding edges of the pole piece to prevent the edge position of the pole piece from being too sharp.

[0082] Step 6: Move the square shell battery to the right again until the second limiting rod 513 from right to left abuts against the inside of the semi-circular through groove of the blocking member 516. Extend the supporting plate member 112 again, and then move the pole piece through the pole piece loader 3 for welding, and repeat until all the contacts on the front of the square shell battery are welded.

[0083] Step 7: Start the synchronous motor 422 to drive all the square shell batteries to rotate half a turn. Then, the pole piece loader 3 moves the pole piece to directly below the laser welder 2 to the left and places the pole piece on the contact of the square shell battery at the corresponding position. Subsequently, the pole piece is welded to the contact by the laser welder 2. Then, reverse the servo motor, and the principle is the same, so that the pole piece 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 can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention, and still be covered by the protection scope of the present invention.

Claims

1. A battery pack flipping and welding tooling, comprising an operation 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 for sliding 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 flipping and welding tooling according to claim 1, wherein 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 flipping and welding tooling according to claim 1, wherein 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 flipping and welding tooling 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 flipping and welding tooling 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 flipping and welding tooling 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. A battery pack flipping and welding tooling 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. A battery pack flipping and welding tooling 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. A battery pack flipping and welding tooling 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 flipping and welding tooling according to claim 1, wherein, Restoring springs are provided between the upper and lower sides of the slider and the supporting plate.

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