Hot compounding winder

Abstract

The utility model discloses a kind of hot compound winding machines, comprising: turret, at least two groups of roll needle components, hot compound component and cutting component.Turret is driven to rotate around its axis, including at least two stations.At least two groups of roll needle components, equiangularly install in turret, and with the rotation of turret to carry out station conversion.Hot compound component, including a pair of heating blocks oppositely arranged, a pair of heating blocks are arranged between two adjacent stations, and respectively located at the two sides of two station connecting line;A pair of heating blocks can be driven to each other close or far, to carry out hot pressing to the diaphragm material belt located therebetween and form composite material belt.Cutting component, between two adjacent stations, for cutting composite material belt.The utility model hot compound winding machine is by being arranged between two groups of roll needle components in two stations, improved on the basis of existing equipment, simplify equipment structure, reduce manufacturing cost.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery automation equipment, and in particular relates to a thermal composite winding machine. Background Technology

[0002] In the manufacturing process of wound battery cells, a winding machine is typically used to precisely stack and wind multiple layers of material, including the first separator strip, the positive electrode sheet, the second separator strip, and the negative electrode sheet, ultimately forming the battery cell. During high-speed winding, relative displacement or slippage can easily occur between the electrode sheets (positive and negative) and the separator strip. This misalignment reduces battery consistency, significantly increases the risk of internal short circuits, and poses a serious safety hazard.

[0003] To overcome the aforementioned technical challenges, existing technologies generally employ a pre-composite strategy. Specifically, before the material enters the winding station, an independent thermal composite mechanism is used to thermally bond at least one layer of separator strip to the adjacent electrode (usually the negative electrode). This effectively suppresses relative slippage during electrode winding, improves winding alignment, and allows for a certain increase in winding speed, thereby ensuring the final quality of the battery cell.

[0004] However, thermal composite mechanisms typically include heating rollers, pressure rollers, temperature control systems, and precision transmission devices, making them a complex and space-consuming subsystem. This not only significantly increases the manufacturing cost and maintenance complexity of the equipment but also makes the overall spatial layout of the equipment more difficult. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model provides a thermal composite winding machine that optimizes the spatial layout and reduces manufacturing costs.

[0006] To achieve the above objectives, the present invention provides a thermal composite winding machine comprising: A turret, driven to rotate about its axis, comprises at least two stations; At least two sets of needle winding assemblies are mounted at equal angles on the turret and rotate with the turret to change work positions; A thermal composite assembly includes a pair of heating blocks arranged opposite each other, the pair of heating blocks being disposed between two adjacent workstations and located on both sides of the line connecting the two workstations; the pair of heating blocks can be driven to move closer or further apart to thermally press the diaphragm strip located therebetween to form a composite strip; The cutting assembly, located between two adjacent workstations, is used to cut composite strips.

[0007] In one embodiment of the thermal composite winding machine of this utility model, the cutting assembly includes a cutter and a cutting drive connected to the cutter, wherein the driving direction of the cutting drive is perpendicular to the conveying direction of the diaphragm strip.

[0008] In one embodiment of the thermal composite winding machine of this utility model, the pair of heating blocks are a first heating block and a second heating block. The first heating block is located on one side of the cutter. The first heating block and the second heating block are respectively connected to a first thermal composite drive and a second thermal composite drive. The driving directions of the first thermal composite drive and the second thermal composite drive are both perpendicular to the conveying direction of the diaphragm strip.

[0009] In one embodiment of the thermal composite winding machine of this utility model, the cutting component and the first heating block are connected to a first alignment drive, and the second heating block is connected to a second alignment drive. The driving directions of the first alignment drive and the second alignment drive are consistent with the conveying direction of the diaphragm material belt, so as to adjust the position of the first heating block, the second heating block, and the cutter along the conveying direction of the diaphragm material belt.

[0010] In one embodiment of the thermal composite winding machine of this utility model, the cutting component and the first heating block are connected to a third thermal composite driving component. The driving direction of the third thermal composite driving component is perpendicular to the conveying direction of the diaphragm strip, driving the cutting component and the first heating block to move synchronously.

[0011] In one embodiment of the thermal composite winding machine of this utility model, a support plate is provided above the second heating block for supporting the electrode strip.

[0012] In one embodiment of the thermal composite winding machine of this utility model, the end of the pallet near the winding needle assembly is provided with an arc-shaped guide surface, and the upper surface of the pallet is provided with a flexible anti-drop layer.

[0013] In one embodiment of the thermal composite winding machine of this utility model, the first heating block is located above the cutter.

[0014] In one embodiment of the thermal composite winding machine of this utility model, the first heating block has a slit for the cutter to extend out.

[0015] In one embodiment of the thermal composite winding machine of this utility model, the thermal composite winding machine further includes a vision inspection component, which is arranged opposite to the cutting component, and the field of view of the vision inspection component is aligned between the two workstations.

[0016] In summary, this utility model of a thermal composite winding machine improves upon existing equipment by placing the thermal composite component between two sets of winding needle components located at two workstations, thereby simplifying the equipment structure and reducing manufacturing costs. Attached Figure Description

[0017] Figure 1 This is a structural diagram of an embodiment of the present utility model;

[0018] Figure 2 yes Figure 1 Structural diagram of the cutting component and part of the thermal composite component;

[0019] Figure 3 yes Figure 1 A structural diagram of another part of the thermal composite component;

[0020] Figure 4 This is a structural diagram of another embodiment of the present invention;

[0021] Figure 5 This is a structural diagram of yet another embodiment of the present utility model;

[0022] In the diagram: S0, diaphragm material strip; S1, first diaphragm material strip; S2, second diaphragm material strip; S3, composite material strip; P0, electrode material strip; P1, first electrode material strip; P2, second electrode material strip; 100. Turret; 110. Winding station; 120. Adhesive application station; 130. Unloading station; 200. Needle winding assembly; 210. First needle winding assembly; 220. Second needle winding assembly; 230. Third needle winding assembly; 300. Cutting assembly; 310. Cutter; 320. Cutting drive; 321. First motor; 322. Eccentric wheel; 323. Connecting rod; 324. First slider; 330. First guide rod; 340. First mounting plate; 350. Second mounting plate; 400. Feeding and cutting mechanism; 500. Thermal bonding assembly; 510. Heating block; 511. First heating block; 512. Second heating block; 5 13. Gap; 520. Second guide rod; 530. First thermal composite drive component; 531. Second motor; 532. Lead screw; 533. Second slider; 534. Mounting base; 540. Second thermal composite drive component; 550. Sixth mounting plate; 560. First bracket; 570. Slide plate; 580. Support plate; 581. Second bracket; 582. Arc-shaped guide surface; 583. Flexible anti-fall layer; 600. First alignment drive component; 610. Third mounting plate; 620. Fourth mounting plate; 700. Third thermal composite drive component; 710. Fifth mounting plate; 800. Second alignment drive component; 900. Vision inspection component. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0024] like Figure 1As shown, the thermal composite winding machine of this utility model winds the first diaphragm strip S1, the first electrode strip P1, the second diaphragm strip S2, and the second electrode strip P2 in sequence to form a battery cell, and thermally composites the first diaphragm strip S1 and the second diaphragm strip S2 at the cutting position.

[0025] This embodiment provides a thermal composite winding machine including a turret 100, at least two sets of winding needle assemblies 200, and a cutting assembly 300. The turret 100 is driven to rotate around its axis and includes at least two workstations. The two sets of winding needle assemblies 200 are mounted at equal angles on the turret 100 and rotate with the turret 100 to change workstations. The cutting assembly 300 is disposed between the two workstations and is used to cut the diaphragm material strip S0 held by the two sets of winding needle assemblies 200 at the two workstations. Continuous first diaphragm material strips S1 and second diaphragm material strips S2 are conveyed to the winding needle assembly 200. Continuous first electrode material strips P1 and second electrode material strips P2 are respectively cut by an infeed cutting mechanism 400 to form first electrode segments and second electrode segments, and are conveyed between the first diaphragm material strips S1 and second diaphragm material strips S2.

[0026] The thermal bonding winding machine also includes a thermal bonding assembly 500 and a vision inspection assembly 900. The thermal bonding assembly 500 includes a pair of heating blocks 510 arranged opposite each other, positioned between two adjacent workstations and on opposite sides of the line connecting the two workstations. A first electrode segment is conveyed to the bonding area of ​​a first diaphragm strip S1 and a second diaphragm strip S2. The pair of heating blocks 510 can be driven to move closer or further apart to thermally press the diaphragm strip S0 and the first electrode segment together to form a composite strip S3. The vision inspection assembly 900 is arranged opposite to the cutting assembly 300, with its field of view aligned between the two workstations. It is used to detect the head position of the first electrode segment. The cutting assembly 300 cuts the composite strip S3 to form the tail bonding area of ​​the previous cell and the head bonding area of ​​the next cell, ensuring consistency in the distance between the head of the first electrode segment and the head of the diaphragm strip S0, thus improving the quality of the cells. The thermal composite winding machine of this embodiment sets the thermal composite component 500 between two stations of the turret 100. It is an improvement on the existing equipment, which does not require the additional complex hot pressing mechanism, thus simplifying the equipment structure and reducing manufacturing costs.

[0027] The feeding and cutting mechanism 400 conveys the first electrode segment and the second electrode segment to the composite area of ​​the first diaphragm material strip S1 and the second diaphragm material strip S2. The vision inspection component 900 can ensure the consistency of the distance between the first electrode segment, the second electrode segment and the head of the diaphragm material strip S0. Compared with the prior art, the first electrode segment and the second electrode segment are closer to the cutting head of the diaphragm material strip S0, thereby improving the cell capacity.

[0028] In this embodiment, the turret 100 has three stations: a winding station 110, an adhesive application station 120, and a blanking station 130. Correspondingly, the needle winding assemblies 200 are also arranged in three groups: a first needle winding assembly 210, a second needle winding assembly 220, and a third needle winding assembly 230. The three groups of needle winding assemblies 200 are installed on the turret 100 at equal angles, with the included angle between each station and the included angle between each group of needle winding assemblies 200 being 120 degrees. The thermal bonding assembly 500 and the cutting assembly 300 are both located between the winding station 110 and the adhesive application station 120. The cutting assembly 300 is located on the side of the line connecting the winding station 110 and the adhesive application station 120 away from the mandrel of the turret 100. As the turret 100 rotates, the three sets of needle winding assemblies 200 work in rotation at the winding station 110, the adhesive application station 120, and the unloading station 130. At the winding station 110, the needle winding assembly 200 winds the diaphragm material strip S0 and the electrode material strip P0 to form a battery cell. At the adhesive application station 120, the battery cell is adhesive-applied. At the unloading station 130, the battery cell is unloaded.

[0029] like Figure 2 As shown, the cutting assembly 300 includes a cutter 310 and a cutting drive 320 connected to the cutter 310. The cutter 310 is slidably mounted on a first mounting plate 340 via multiple first guide rods 330. The first mounting plate 340 is mounted on a second mounting plate 350, and the first mounting plate 340 and the second mounting plate 350 are arranged perpendicularly. The cutting drive 320 includes a first motor 321, an eccentric wheel 322, a connecting rod 323, and a first slider 324. The first motor 321 is mounted on the second mounting plate 350, and its driving end passes through the second mounting plate 350 and is connected to the eccentric wheel 322. The eccentric wheel 322 is connected to the connecting rod 323 and the first guide rods 330 on both sides, and the first slider 324 is slidably mounted on the second mounting plate 350 via a slide rail. The cutting drive unit 320 adopts the driving method of eccentric wheel 322 and connecting rod 323, which enables the cutter 310 to cut the diaphragm material strip S0 instantly, and converts the driving direction of the first motor 321 to be perpendicular to the conveying direction of the diaphragm material strip S0, driving the cutter 310 to cut the diaphragm material strip S0.

[0030] A pair of heating blocks 510 are designated as a first heating block 511 and a second heating block 512. The first heating block 511 is located above the cutter 310, and the second heating block 512 is located opposite the first heating block 511. The first heating block 511 is slidably mounted on the first mounting plate 340 via multiple second guide rods 520. The first heating block 511 is connected to a first thermal composite drive unit 530, whose driving direction is perpendicular to the conveying direction of the diaphragm strip S0, driving the first heating block 511 to move closer to or away from the diaphragm strip S0.

[0031] The first thermal bonding drive component 530 includes a second motor 531, a lead screw 532, and a second slider 533. The second motor 531 is mounted on the second mounting plate 350 via a mounting base 534 and is located above the eccentric wheel 322. One end of the lead screw 532 is connected to the first mounting plate 340, and the other end is connected to the second motor 531. The second slider 533 is slidably mounted on the lead screw 532 and is connected to multiple second guide rods 520. The cutter 310 and the first heating block 511 are both slidably mounted on the first mounting plate 340, and the first heating block 511 is located above the cutter 310. After the diaphragm strip S0 is thermally bonded, it can be cut by the cutter 310 to form the tail bonding area of ​​the previous cell and the head bonding area of ​​the next cell. The tail bonding area and the head bonding area can respectively wrap the tail of the first electrode strip P1 of the previous cell and the head of the first electrode strip P1 of the next cell, preventing the first electrode strip P1 from shifting.

[0032] The cutting assembly 300 and the first heating block 511 are connected to a first alignment drive 600. The driving direction of the first alignment drive 600 is consistent with the conveying direction of the diaphragm material belt S0, so as to adjust the position of the first heating block 511 and the cutter 310 along the conveying direction of the diaphragm material belt S0. Specifically, the first mounting plate 340 and the second mounting plate 350 are jointly mounted on a third mounting plate 610. The third mounting plate 610 is slidably mounted on a fourth mounting plate 620 via a slide rail. The first alignment drive 600 is mounted on the fourth mounting plate 620. The first alignment drive 600 is preferably a combination of a motor and a lead screw. The lead screw slider is connected to the third mounting plate 610, driving the third mounting plate 610 to move along the conveying direction of the diaphragm material belt S0, thereby driving the first heating block 511 and the cutter 310 to move synchronously. When operation is required, the first heating block 511 is aligned with the diaphragm strip S0, and the cutter 310 is aligned with the composite strip S3; when repositioning is required, the first heating block 511 and the cutter 310 are moved away from the turret 100.

[0033] The cutting assembly 300 and the first heating block 511 are connected to a third thermal composite drive 700. The driving direction of the third thermal composite drive 700 is perpendicular to the conveying direction of the diaphragm material belt S0, driving the cutting assembly 300 and the first heating block 511 to move synchronously in a direction perpendicular to the diaphragm material belt S0. Specifically, the fourth mounting plate 620 is slidably mounted on a fifth mounting plate 710 via a slide rail. The third thermal composite drive 700 is mounted on the fifth mounting plate 710. The third thermal composite drive 700 is preferably a combination of a motor and a lead screw. The lead screw slider is connected to the fourth mounting plate 620, driving the fourth mounting plate 620 to move in a direction perpendicular to the conveying direction of the diaphragm material belt S0, thereby driving the first heating block 511 and the cutter 310 to move synchronously. When working, the first heating block 511 and the cutter 310 are close to the diaphragm material belt S0; when avoiding movement, the first heating block 511 and the cutter 310 are away from the turret 100.

[0034] like Figure 3 As shown, the second heating block 512 is connected to the second thermal composite drive component 540. The driving direction of the second thermal composite drive component 540 is perpendicular to the conveying direction of the diaphragm material belt S0, driving the second heating block 512 to move closer to or away from the diaphragm material belt S0. Specifically, the second thermal composite drive component 540 is mounted on a sixth mounting plate 550, and the second heating block 512 is mounted on a sliding plate 570 via a first bracket 560. The sliding plate 570 is slidably mounted on the sixth mounting plate 550 via a slide rail. The second thermal composite drive component 540 is preferably a combination of a motor and a lead screw, with the lead screw slider connected to the sliding plate 570. When operation is required, the second heating block 512 moves closer to the diaphragm material belt S0; when repositioning is required, the second heating block 512 moves away from the turret 100.

[0035] The second heating block 512 is connected to a second alignment drive 800. The driving direction of the second alignment drive 800 is consistent with the conveying direction of the diaphragm belt S0, so as to adjust the position of the second heating block 512 along the conveying direction of the diaphragm belt S0. Specifically, the sixth mounting plate 550 is slidably mounted on a large equipment plate (not shown) via a slide rail. The second alignment drive 800 is mounted on the large equipment plate. The second alignment drive 800 is preferably a combination of a motor and a lead screw. The lead screw slider is connected to the sixth mounting plate 550, driving the sixth mounting plate 550 to move along the conveying direction of the diaphragm belt S0, thereby driving the second heating block 512 to move. When working, the second heating block 512 is aligned with the diaphragm belt S0; when avoiding positioning, the second heating block 512 is moved away from the turret 100.

[0036] A support plate 580 is disposed above the second heating block 512 to support the second electrode strip P2. The support plate 580 is mounted on the sixth mounting plate 550 via a second bracket 581. The support plate 580 is fixed in position perpendicular to the diaphragm strip S0. The support plate 580 is unaffected as the second heating block 512 moves closer to or further away from the diaphragm strip S0, supporting the second electrode strip P2 and preventing it from being damaged. The support plate 580 is mounted on the sixth mounting plate 550 and can move along the conveying direction of the diaphragm strip S0 with the sixth mounting plate 550 to avoid misalignment.

[0037] One end of the tray 580 near the needle winding assembly 200 is provided with an arc-shaped guide surface 582, which can smoothly guide the tail of the second electrode strip P2 supported by the tray 580 into the needle winding assembly 200, avoiding scratches to the second electrode strip P2 by the edge of the tray 580. The upper surface of the tray 580 is provided with a flexible anti-drop layer 583, preferably foam, to prevent the tail of the second electrode strip P2 from being damaged by falling on the tray 580.

[0038] The working process of the thermal composite winding machine is as follows: The first diaphragm material strip S1 and the second diaphragm material strip S2 are continuously conveyed to the first winding needle assembly 210 located at the winding station 110. At this time, the second winding needle assembly 220 is located at the adhesive application station 120, and the third winding needle assembly 230 is located at the unloading station 130.

[0039] The continuous first electrode strip P1 and second electrode strip P2 are cut by the feeding and cutting mechanism 400 to form the first electrode segment and the second electrode segment, respectively, and are conveyed between the first diaphragm strip S1 and the second diaphragm strip S2.

[0040] The first winding needle assembly 210 winds the first diaphragm strip S1, the first electrode segment, the second diaphragm strip S2, and the second electrode segment to form a battery cell.

[0041] refer to Figure 1 As shown, after winding is completed, the turret 100 is repositioned, causing each group of winding needle assemblies 200 to flip one station. The first winding needle assembly 210 is repositioned to the adhesive application station 120, which drives the battery cell to be repositioned to the adhesive application station 120. The second winding needle assembly 220 is repositioned to the unloading station 130, and the third winding needle assembly 230 is repositioned to the winding station 110.

[0042] The battery cell of the first winding needle assembly 210 is still connected to the two layers of separator material strip S0. The first electrode segment and the second electrode segment are conveyed to the composite area of ​​the separator material strip S0. The two layers of separator material strip S0 are held in a vertical state. The third winding needle assembly 230 extends out of the winding station 110 and clamps the two layers of separator material strip S0 and the first electrode segment and the second electrode segment.

[0043] The third thermal composite drive component 700 drives the first heating block 511 and the cutter 310 to move synchronously and approach the diaphragm material belt S0.

[0044] The first thermal composite drive unit 530 and the second thermal composite drive unit 540 drive the first heating block 511 and the second heating block 512 to approach the diaphragm material strip S0. At the same time, the first alignment drive unit 600 and the second alignment drive unit 800 drive the first heating block 511 and the second heating block 512 to move along the conveying direction of the diaphragm material strip S0, so that the first heating block 511 and the second heating block 512 cooperate with each other to press the diaphragm material strip S0 to form a composite material strip S3.

[0045] After thermal bonding is completed, the first thermal bonding drive 530 and the second thermal bonding drive 540 drive the first heating block 511 and the second heating block 512 away from the diaphragm strip S0.

[0046] The visual inspection component 900 detects the head position of the first electrode segment. Based on the detection result, the first alignment drive component 600 drives the first heating block 511 and the cutter 310 to move upward as a whole, so that the cutter 310 is aligned with the composite material strip S3 which is a set distance away from the head of the first electrode segment. The cutting drive component 320 drives the cutter 310 to extend and cut the composite material strip S3 to form the tail composite area of ​​the previous cell and the head composite area of ​​the next cell.

[0047] After cutting, the first alignment drive 600, the second alignment drive 800, the first thermal composite drive 530, the second thermal composite drive 540, and the third thermal composite drive 700 are reset to avoid interfering with the operation of the needle coil assembly 200 and the turret 100.

[0048] The battery cell of the first winding assembly 210 is finished with adhesive at the adhesive application station, the battery cell of the second winding assembly is unloaded at the unloading station 130, and the battery cell of the third winding assembly 230 is clamped at the winding station 110 and wound together the head composite area, the first electrode segment, and the second electrode segment to form the next battery cell.

[0049] like Figure 4 As shown, in another embodiment, the first heating block 511 can also be arranged below the cutter 310. After the diaphragm strip S0 is hot-pressed to form a composite strip S3, the first alignment drive 600 drives the cutter 310 to move down, so that the cutter 310 is aligned with the composite strip S3 and cuts it.

[0050] like Figure 5 As shown, in another embodiment, the first heating block 511 is provided with a slit 513 for the cutter 310 to extend out. After the diaphragm strip S0 is hot-pressed to form a composite strip S3, there is no need to adjust the position of the cutter 310. The cutting drive 320 directly drives the cutter 310 to extend out of the slit 513 of the first heating block 511 to cut the composite strip S3.

[0051] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A thermal composite winding machine, characterized in that, include: A turret, driven to rotate about its axis, comprises at least two stations; At least two sets of needle winding assemblies are mounted at equal angles on the turret and rotate with the turret to change work positions; A thermal composite assembly includes a pair of heating blocks arranged opposite each other, the pair of heating blocks being disposed between two adjacent workstations and located on both sides of the line connecting the two workstations; the pair of heating blocks can be driven to move closer or further apart to thermally press the diaphragm strip located therebetween to form a composite strip; The cutting assembly, located between two adjacent workstations, is used to cut composite strips.

2. The thermal composite winding machine as described in claim 1, characterized in that, The cutting assembly includes a cutter and a cutting drive connected to the cutter, wherein the driving direction of the cutting drive is perpendicular to the conveying direction of the diaphragm strip.

3. The thermal composite winding machine as described in claim 2, characterized in that, The pair of heating blocks are a first heating block and a second heating block. The first heating block is located on one side of the cutter. The first heating block and the second heating block are respectively connected to a first thermal composite drive and a second thermal composite drive. The driving directions of the first thermal composite drive and the second thermal composite drive are perpendicular to the conveying direction of the diaphragm material belt.

4. The thermal composite winding machine as described in claim 3, characterized in that, The cutting component and the first heating block are connected to a first alignment drive, and the second heating block is connected to a second alignment drive. The driving directions of the first alignment drive and the second alignment drive are consistent with the conveying direction of the diaphragm material belt, so as to adjust the position of the first heating block, the second heating block, and the cutter along the conveying direction of the diaphragm material belt.

5. The thermal composite winding machine as described in claim 3, characterized in that, The cutting component and the first heating block are connected to a third thermal composite drive component. The driving direction of the third thermal composite drive component is perpendicular to the conveying direction of the diaphragm strip, driving the cutting component and the first heating block to move synchronously.

6. The thermal composite winding machine as described in claim 3, characterized in that, A support plate is provided above the second heating block to support the electrode strip.

7. The thermal composite winding machine as described in claim 6, characterized in that, The end of the tray near the needle coil assembly is provided with an arc-shaped guide surface, and the upper surface of the tray is provided with a flexible anti-drop layer.

8. The thermal composite winding machine as described in claim 3, characterized in that, The first heating block is located above the cutter.

9. The thermal composite winding machine as described in claim 3, characterized in that, The first heating block has a slit for the cutter to extend out.

10. The thermal composite winding machine as described in claim 1, characterized in that, The thermal composite winding machine also includes a vision inspection component, which is arranged opposite to the cutting component, and the field of view of the vision inspection component is aligned between the two workstations.

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