Thermal compounding device

Abstract

The utility model discloses a kind of hot compound devices, comprising: deviation rectifying mechanism, for conveying and rectifying a polar piece material belt. Film combining mechanism, it is directly received from the output polar piece material belt of deviation rectifying mechanism to be set at one side of deviation rectifying mechanism, including oppositely arranged film combining roller and at least one guide roller, film combining roller is used to film combine and convey polar piece material belt and at least one diaphragm material belt, guide roller is set at one side of film combining roller towards deviation rectifying mechanism, for supporting diaphragm material belt of different direction conveying. It further includes at least one hot-pressing mechanism, it is set downstream of film combining mechanism, to compound multiple material belts passing through, form composite material belt. The utility model hot compound device is directly received from the output polar piece material belt of deviation rectifying mechanism by being set in adjacent position with deviation rectifying mechanism and film combining mechanism, by real-time, accurate rectification action, ensure that polar piece material belt enters compound stage with correct position, to avoid alignment defect, improve product quality.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery automation equipment, and in particular relates to a thermal bonding device for bonding electrode strips and separator strips into a single strip. Background Technology

[0002] In the battery cell manufacturing process, electrode strips and separator strips are usually combined into an integrated composite strip through a hot pressing process. This composite strip is then sent to subsequent winding or stacking processes for forming.

[0003] However, prior to this lamination process, the electrode strip is highly susceptible to positional shifts in its width direction (i.e., perpendicular to the conveying direction) due to its material properties, unwinding tension fluctuations, or conveying path deviations. This shift leads to inaccurate alignment between the electrode and separator, resulting in uneven edges and inconsistent electrode-separator coverage in the laminated strip. Severe shifts can even cause the electrode to directly contact the equipment, introducing foreign metal objects or scratching the electrode coating, potentially leading to internal short circuits in the battery. Such poorly aligned laminated strips directly affect the stability of subsequent processes and the final cell performance. Summary of the Invention

[0004] To address the technical problems existing in the prior art, this utility model provides a thermal bonding device that avoids misalignment defects between the electrode strip and the diaphragm strip.

[0005] To achieve the above objectives, the thermal bonding device of this utility model includes: The alignment mechanism is used to convey and correct the deviation of the electrode strip. A film-coating mechanism is disposed on one side of the correction mechanism to directly receive the electrode strip output from the correction mechanism. It includes a film-coating roller and at least one guide roller disposed opposite to each other. The film-coating roller is used to co-coat and convey the electrode strip and at least one diaphragm strip. The guide roller is disposed on the side of the film-coating roller facing the correction mechanism and is used to support the diaphragm strips conveyed in different directions. At least one hot pressing mechanism is located downstream of the film-coating mechanism to combine the passing multi-layer strips to form a composite strip.

[0006] In one embodiment of the thermal bonding device of this utility model, the correction mechanism includes correction rollers arranged opposite each other. At least one of the correction rollers arranged opposite each other can be driven to rotate actively, at least one of them can be driven to move closer to the other correction roller, and the correction rollers can be driven to move along the width direction of the electrode strip.

[0007] In one embodiment of the thermal bonding device of this utility model, the correction mechanism is provided with support plates on both sides for supporting the electrode sheets.

[0008] In one embodiment of the thermal lamination device of this utility model, at least one of the oppositely arranged film-coating rollers can be driven to rotate actively, and at least one can be driven to approach the other film-coating roller.

[0009] In one embodiment of the thermal bonding device of this utility model, the correction roller is rotatably mounted on a correction fixing seat, and the correction fixing seat is provided with a first inclined surface above the surface facing the discharge direction of the electrode strip.

[0010] In one embodiment of the thermal lamination device of this utility model, the film-coating roller is rotatably mounted on a film-coating fixing seat, and the surface of the film-coating roller fixing seat facing the correction mechanism is provided with a second inclined surface.

[0011] In one embodiment of the thermal composite device of this utility model, the hot pressing mechanism includes a first hot pressing roller and a second hot pressing roller arranged opposite to each other. An adjustment mechanism is provided on one side of the hot pressing mechanism. The adjustment mechanism includes a first passing roller. The first passing roller is driven by a separation drive member to drive the composite material strip to separate from the first hot pressing roller and the second hot pressing roller.

[0012] In one embodiment of the thermal composite device of this utility model, the hot pressing mechanism is configured as two sets, and the adjusting mechanism is disposed between the two sets of hot pressing mechanisms.

[0013] In one embodiment of the thermal bonding device of this utility model, the adjusting mechanism further includes a second roller, which is driven by a buffer drive to buffer the bonding strip.

[0014] In one embodiment of the thermal bonding device of this utility model, there are two first rollers and a second roller is disposed between the two first rollers. The composite strip passes around the first rollers and the second rollers. The second roller is in contact with the upper surface of the composite strip and the first roller is in contact with the lower surface of the composite strip.

[0015] In summary, this utility model's thermal lamination device, by placing the correction mechanism and the film-coating mechanism in adjacent positions, directly receives the electrode strip output from the correction mechanism. Through real-time and precise correction actions, it ensures that the electrode strip enters the lamination stage in the correct position, thereby avoiding misalignment defects and improving product quality. Attached Figure Description

[0016] Figure 1 This is a structural diagram of an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 Structural diagram of the center correction mechanism;

[0018] Figure 3 yes Figure 1 Another structural diagram of the center correction mechanism;

[0019] Figure 4 yes Figure 1 Structural diagram of the tandem membrane mechanism;

[0020] Figure 5 yes Figure 1 Structural diagram of the hot pressing mechanism;

[0021] Figure 6 yes Figure 1 Another structural diagram of the hot pressing mechanism;

[0022] Figure 7 yes Figure 1 Structural diagram of the central adjustment mechanism;

[0023] Figure 8 yes Figure 1 Another structural diagram of the central regulating mechanism;

[0024] In the diagram: 10, electrode sheet strip; 20, diaphragm strip; 30, composite strip; 100, sheet feeding mechanism; 110, feeding plate; 200, correction mechanism; 210, correction roller; 211, upper correction roller; 212, lower correction roller; 220, correction fixing seat; 221, first inclined surface; 230, correction movable seat; 240, first driving component; 250, second driving component; 260, correction driving component; 270, support plate; 271, guide surface; 300, film combining mechanism; 310, film combining roller; 311, upper film combining roller; 312, lower film combining roller; 320, guide roller; 321, mounting block; 330, film combining roller fixing seat; 331, second inclined surface; 340, film combining roller movable seat; 350, third driving component; 360, fourth driving component; 400. Hot pressing mechanism; 410. First hot pressing roller; 420. Second hot pressing roller; 430. Fifth driving component; 440. Mounting frame; 450. Hot pressing roller seat; 460. Guide column; 470. Movable seat; 471. Slide rail; 480. Hot pressing driving component; 490. Sixth driving component; 500. Cutting mechanism; 600. Detection mechanism; 610. Detection frame; 620. Correction sensor; 700. Dust removal mechanism; 710. Dust removal plate; 720. Dust removal hood; 730. Support plate; 740. Cylinder; 750. Pressure regulating valve; 800. Adjustment mechanism; 810. First guide roller; 820. Second guide roller; 830. First mounting seat; 840. Second mounting seat; 850. Third mounting seat; 860. Buffer driving component; 870. Separation driving component. Detailed Implementation

[0025] 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.

[0026] like Figure 1 In the thermal lamination device shown, an electrode strip 10 is conveyed to the hot pressing mechanism 400 via a feeding mechanism 100, a web-aligning mechanism 200, and a film-coating mechanism 300. The infeed direction of the electrode strip 10 is called the upstream of the thermal lamination device, and the outfeed direction is called the downstream of the thermal lamination device. At least one diaphragm strip 20 passes between the web-aligning mechanism 200 and the film-coating mechanism 300, and is combined with the electrode strip 10 and conveyed to the hot pressing mechanism 400. The hot pressing mechanism 400 hot-presses the multi-layer strips to form a composite strip 30. In this embodiment, the lamination of one electrode strip 10 and two diaphragm strips 20 is used as an example. In other embodiments, multiple strips can be used for lamination, such as one electrode strip 10 and one diaphragm strip 20, or two electrode strips 10 and one diaphragm strip 20.

[0027] The feeding mechanism 100, the correction mechanism 200, the film-coating mechanism 300, and the hot-pressing mechanism 400 are arranged sequentially along the conveying direction of the electrode material belt 10.

[0028] The feeding mechanism 100 includes feeding plates 110 arranged opposite each other. The two feeding plates 110 can be driven to move closer or further apart from each other. The feeding plates 110 can prevent the electrode strip 10 from sagging.

[0029] A cutting mechanism 500 is provided between the feeding mechanism 100 and the correction mechanism 200. This mechanism is used to cut the electrode strip 10 into a previous electrode strip and a subsequent electrode strip. After the previous electrode strip is conveyed for a certain distance, the subsequent electrode strip is conveyed again, so that a gap is formed between the previous electrode strip and the subsequent electrode strip. The composite strip 30 formed by combining the gapped electrode strip 10 with the separator strip 20 only needs to be cut at the gap of the separator strip 20 during winding or stacking. This avoids the burrs that are easily generated by cutting the electrode strip 10 again, which would puncture the separator strip and affect the quality of the battery cell.

[0030] The cutting mechanism 500 can be driven to move along the conveying direction of the electrode strip 10. When the cutting mechanism 500 moves synchronously with the electrode strip 10, it cuts the electrode strip 10. Maintaining the same speed for cutting helps improve the cutting effect of the electrode strip 10. Because the cutting mechanism 500 is provided between the feeding mechanism 100 and the correction mechanism 200, the distance between the feeding mechanism 100 and the correction mechanism 200 is relatively large. The feeding plate 110 of the feeding mechanism 100 can prevent the head of the subsequent electrode strip from drooping or deviating from the conveying direction of the electrode strip. The feeding mechanism 100 can be driven to move along the conveying direction of the electrode strip 10 to convey the electrode strip 10 to the correction mechanism 200. The feeding plate 110 passes through the cutting mechanism 500 and inserts the electrode strip 10 into the correction mechanism 200.

[0031] A detection mechanism 600 is provided between the correction mechanism 200 and the cutting mechanism 500. The detection mechanism 600 includes a detection frame 610 and a correction sensor 620. The electrode strip 10 can pass through the detection frame 610. The correction sensor 620 is preferably a pair of fiber optic sensors, which are spaced apart along the thickness direction of the electrode strip 10. They are used to detect the offset of the edge of the electrode strip 10. According to the offset, the correction mechanism 200 corrects the offset of the electrode strip 10.

[0032] like Figure 2 , 3 As shown, the correction mechanism 200 includes correction rollers 210 arranged opposite each other. At least one of the correction rollers 210 can be driven to rotate actively, and at least one can be driven to approach the other correction roller 210. The correction roller 210 can be driven to move along the width direction of the electrode strip 10.

[0033] In this embodiment, the opposing correction rollers 210 are an upper correction roller 211 and a lower correction roller 212. The upper correction roller 211 is rotatably mounted on a correction fixed seat 220, and the lower correction roller 212 is rotatably mounted on a correction movable seat 230. The rotating shaft of the upper correction roller 211 passes through the correction fixed seat 220 and is connected to a first driving member 240. The first driving member 240 drives the upper correction roller 211 to rotate actively, and the lower correction roller 212 to rotate passively. The opposing correction rollers 210 cooperate to convey the electrode material strip 10. The correction movable seat 230 is slidably connected to the correction fixed seat 220 through a guide rod or slide rail. The correction movable seat 230 is connected to a second driving member 250. The second driving member 250 drives the lower correction roller 212 to move closer to or away from the upper correction roller 211, changing the distance between the two correction rollers 210 and clamping or releasing the electrode material strip 10. The correction fixing base 220 is connected to a correction driving component 260. The correction driving component 260 drives the correction fixing base 220 to move along the width direction of the electrode material strip 10, thereby driving the two correction rollers 210 to move along the width direction of the electrode material strip 10 to correct the electrode material strip 10.

[0034] The first driving component 240, the second driving component 250, and the correction driving component 260 are preferably a motor lead screw assembly.

[0035] The correction mechanism 200 has a support plate 270 on both sides. The support plate 270 can be installed on the correction fixed base 220 or the correction movable base 230. The edge of the support plate 270 facing the feeding direction of the electrode strip 10 is provided with a guide surface 271 to facilitate the insertion of the electrode strip 10 between the two correction rollers 210.

[0036] The correction fixing seat 220 has a first inclined surface 221 above the surface facing the discharge direction of the electrode material strip 10. Since the correction mechanism 200 and the film-coating mechanism 300 are close to each other, the diaphragm material strip 20 can only be fed into the film-coating mechanism 300 in a direction that is approximately perpendicular to the electrode material strip 10. The setting of the first inclined surface 221 can increase the feeding angle of the diaphragm material strip 20 and make the spatial layout more selective.

[0037] The film-coating mechanism 300 is located on one side of the correction mechanism 200, as close as possible to the correction mechanism 200, so as to directly receive the electrode material strip 10 output from the correction mechanism 200. The close distance between the film-coating mechanism 300 and the correction mechanism 200 can ensure that the electrode material strip 10 is immediately coupled with the separator material strip 20 after correction, ensuring that the electrode material strip 10 enters the composite stage in the correct position, avoiding misalignment defects, and improving the quality of the composite material strip 30.

[0038] like Figure 4 As shown, the film-coating mechanism 300 includes a film-coating roller 310 and at least one guide roller 320 arranged opposite to each other. The film-coating roller 310 is used to film and convey the electrode strip 10 and at least one diaphragm strip 20 together. The guide roller 320 is arranged on the side of the film-coating roller 310 facing the correction mechanism 200 and is used to support the diaphragm strips 20 conveyed in different directions.

[0039] In this embodiment, the opposing film-coating rollers 310 include an upper film-coating roller 311 and a lower film-coating roller 312. The upper film-coating roller 311 is rotatably mounted on the film-coating roller fixed seat 330, and the lower film-coating roller 312 is rotatably mounted on the film-coating roller movable seat 340. The rotating shaft of the upper film-coating roller 311 passes through the film-coating roller fixed seat 330 and is connected to a third driving member 350. The third driving member 350 drives the upper film-coating roller 311 to rotate actively, and the lower film-coating roller 312 to rotate passively. The opposing film-coating rollers 310 cooperate to convey the electrode sheet material strip 10 and the diaphragm material strip 20. The film-coating roller movable seat 340 is slidably connected to the film-coating roller fixed seat 330 through a guide rod or slide rail. The film-coating roller movable seat 340 is connected to a fourth driving member 360. The fourth driving member 360 drives the lower film-coating roller 312 to move closer to or away from the upper film-coating roller 311, changing the distance between the two film-coating rollers 310, and clamping or releasing the multi-layer material strip.

[0040] The third drive component 350 and the fourth drive component 360 are preferably a motor lead screw assembly.

[0041] Multiple guide rollers 320 can be provided to support the diaphragm material strip 20 fed from between the correction mechanism 200 and the film-coating mechanism 300 in a direction perpendicular to the electrode material strip 10, and then guide it between the two film-coating rollers 310. In this embodiment, one guide roller 320 is provided, which is mounted on the surface of the film-coating roller fixing seat 330 facing the correction mechanism 200 by a mounting block 321, and a diaphragm material strip 20 is guided between the two film-coating rollers 310 through the guide roller 320.

[0042] The surface of the film-coating roller fixing seat 330 faces the correction mechanism 200, and a second inclined surface 331 is provided near the upper film-coating roller 311. The provision of the second inclined surface 331 can also increase the feeding angle of the diaphragm material strip 20. Another diaphragm material strip 20 is fed into the film-coating mechanism 300 at an inclined angle.

[0043] like Figure 5 As shown, the hot pressing mechanism 400 is used to hot press the multi-layer material strip to form a composite material strip 30. The hot pressing mechanism 400 is configured in two sets, performing multiple hot pressing operations on the multi-layer material strip to improve the composite effect. The hot pressing mechanism 400 includes a first hot pressing roller 410 and a second hot pressing roller 420 arranged opposite each other. Each of the two hot pressing rollers is connected to a fifth driving member 430, which drives the two hot pressing rollers to rotate actively to convey the composite material strip 30. The first hot pressing roller 410 is mounted on a mounting frame 440, and the second hot pressing roller 420 is mounted on a hot pressing roller seat 450. The hot pressing roller seat 450 is connected to a movable seat 470 via multiple guide posts 460. The movable seat 470 is slidably mounted on the mounting frame 440 in a direction perpendicular to the composite material strip 30.

[0044] A pressure sensor (not shown) is installed between the hot press roller seat 450 and the movable seat 470. A hot press drive 480 is mounted on the movable seat 470. One end of the pressure sensor abuts against the hot press roller seat 450, and the other end is connected to the drive end of the hot press drive 480. The hot press drive 480 drives the second hot press roller 420 to move closer to or away from the first hot press roller 410. The pressure sensor is used to detect the pressure between the first hot press roller 410 and the second hot press roller 420, so that the composite material strip 30 is subjected to appropriate pressure.

[0045] The movable seat 470 is slidably mounted on the mounting frame 440 at both ends along the width direction of the composite strip 30 via slide rails 471. The mounting frame 440 is provided with two sixth driving members 490. The driving end of the sixth driving member 490 is connected to the movable seat 470, driving the movable seat 470 to slide along the slide rails 471 to adjust the parallelism between the second hot press roller 420 and the first hot press roller 410.

[0046] The hot-press drive component 480, the fifth drive component 430, and the sixth drive component 490 are preferably motor lead screw assemblies.

[0047] A dust removal mechanism 700 is provided on one side of the first hot press roller 410 and the second hot press roller 420. The dust removal mechanism 700 includes a dust removal plate 710 and a dust removal cover 720. In the direction perpendicular to the composite material belt 30, since the first hot press roller 410 is fixed and the second hot press roller 420 can move, in order to ensure that the dust removal mechanism 700 on the side of the first hot press roller 410 is fixed and the dust removal mechanism 700 on the side of the second hot press roller 420 can move synchronously with the second hot press roller 420, the dust removal cover 720 of the dust removal mechanism 700 corresponding to the first hot press roller 410 is installed on the mounting frame 440, and the dust removal cover 720 of the dust removal mechanism 700 corresponding to the second hot press roller 420 is installed on the hot press roller seat 450. A dust collector hood 720 is connected to a support plate 730. The support plate 730 has a groove inside to accommodate a dust collector plate 710. The dust collector plate 710 is slidably disposed within the groove and can be driven to approach or move away from the first hot press roller 410 or the second hot press roller 420. The dust collector plate 710 is connected to the support plate 730 via a guide rod. A cylinder 740 is connected to the dust collector plate 710, driving it to contact the first hot press roller 410 or the second hot press roller 420 and extend into the dust collector hood 720. A negative pressure device is connected to the outside of the dust collector hood 720. The dust collector plate 710 scrapes away dust from the outer surfaces of the first hot press roller 410 and the second hot press roller 420, while the negative pressure device sucks away the dust inside the dust collector hood 720. The cylinder 740 is connected to a pressure regulating valve 750 to control the contact pressure between the dust collector plate 710 and the first hot press roller 410 or the second hot press roller 420.

[0048] Refer again Figure 1 As shown, an adjustment mechanism 800 is provided between the two sets of hot pressing mechanisms 400. The adjustment mechanism 800 includes a first guide roller 810 and a second guide roller 820. In this embodiment, there are two first guide rollers 810, and the second guide roller 820 is provided between the two first guide rollers 810. The second guide roller 820 and the first guide roller 810 are spaced apart along the conveying direction of the composite material belt 30. The composite material belt 30 passes around the first guide roller 810 and the second guide roller 820. The composite material belt 30 is in contact with the upper surface of the second guide roller 820 and the lower surface of the first guide roller 810. The second guide roller 820 and the first guide roller 810 can be driven to move in a direction perpendicular to the composite material belt 30.

[0049] like Figure 7 , Figure 8As shown, the first guide roller 810 is mounted on a first mounting base 830, and the second guide roller 820 is mounted on a second mounting base 840. Both the first mounting base 830 and the second mounting base 840 are slidably mounted on a third mounting base 850. The third mounting base 850 is provided with a buffer drive 860 and a separation drive 870. The buffer drive 860 is preferably a cylinder, connected to the second mounting base 840, driving the second mounting base 840 to move, thereby driving the second guide roller 820 to move, thus buffering the composite material strip 30. The separation drive 870 is preferably a cylinder, connected to the first mounting base 830, driving the first mounting base 830 to move, thereby driving the first guide roller 810 to move, thus separating the composite material strip 30 from the first hot press roller 410 and the second hot press roller 420, avoiding thermal damage to the composite material strip 30, and improving product consistency and yield.

[0050] The work process is as follows: Two diaphragm strips 20 are fed from between the correction mechanism 200 and the film-coating mechanism 300 to between the two film-coating rollers 310 of the film-coating mechanism 300. The electrode strip 10 is conveyed by the feeding mechanism 100, the cutting mechanism 500, and the correction mechanism 200 to between the two diaphragm strips 20 conveyed by the film-coating mechanism 300. After the multi-layer strips are film-coated, they are conveyed to the hot pressing mechanism 400. The hot pressing drive 480 drives the second hot pressing roller 420 to approach the first hot pressing roller 410 and clamp the multi-layer strips. The fifth drive 430 drives the first hot pressing roller 410 and the second hot pressing roller 420 to rotate, driving the multi-layer strips to be conveyed. During the conveying process, the first hot pressing roller 410 and the second hot pressing roller 420 are heated to hot press the multi-layer strips to form a composite strip 30.

[0051] The buffer drive 860 adjusts the position of the second roller 820 according to the conveying speed of the multi-layer material belt before and after the hot pressing mechanism 400 to prevent inconsistent speeds from damaging the multi-layer material belt.

[0052] When the correction sensor 620 detects that the electrode strip 10 is off-center, the correction mechanism 200 corrects the electrode strip 10.

[0053] After the electrode strip 10 is conveyed a certain distance, the cutting mechanism 500 and the feeding mechanism 100 are driven to move along the conveying direction of the electrode strip 10. When the speed is the same as that of the electrode strip 10, the cutting mechanism 500 cuts the electrode strip 10 to form a previous electrode strip 10 and a subsequent electrode strip 10. The feeding mechanism 100 decelerates so that the previous electrode strip 10 and the subsequent electrode strip 10 are spaced a certain distance apart. After a set distance is reached, the feeding mechanism 100 is driven to move. The feeding plate 110 clamps the head of the next electrode strip 10 and passes it through the cutting mechanism 500. The head of the next electrode strip 10 is inserted between the two straightening rollers 210. The two straightening rollers 210 rotate actively to convey the next electrode strip 10 to the two film-coating rollers 310. The two film-coating rollers 310 rotate actively to convey the electrode strip 10 and the two diaphragm strips 20 to the hot pressing mechanism 400 for hot pressing to form a composite strip 30.

[0054] When the equipment stops, the hot pressing drive 480 drives the second hot pressing roller 420 away from the first hot pressing roller 410, and the separation drive 870 drives the first passing roller 810 away from the first hot pressing roller 410, so that the composite material strip 30 is separated from the first hot pressing roller 410 and the second hot pressing roller 420, preventing the residual heat of the first hot pressing roller 410 and the second hot pressing roller 420 from damaging the composite material strip 30 and improving the quality of the composite material strip 30.

[0055] 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 bonding apparatus for hot-pressing multi-layer strips into a composite strip, characterized in that, include: The alignment mechanism is used to convey and correct the deviation of the electrode strip. A film-coating mechanism is disposed on one side of the correction mechanism to directly receive the electrode strip output from the correction mechanism. It includes a film-coating roller and at least one guide roller disposed opposite to each other. The film-coating roller is used to co-coat and convey the electrode strip and at least one diaphragm strip. The guide roller is disposed on the side of the film-coating roller facing the correction mechanism and is used to support the diaphragm strips conveyed in different directions. At least one hot pressing mechanism is located downstream of the film-coating mechanism to combine the passing multi-layer strips to form a composite strip.

2. The thermal composite device as described in claim 1, characterized in that, The correction mechanism includes correction rollers arranged opposite each other. At least one of the correction rollers can be driven to rotate actively, and at least one can be driven to move closer to the other correction roller. The correction rollers can be driven to move along the width direction of the electrode strip.

3. The thermal composite device as described in claim 1 or 2, characterized in that, The correction mechanism is equipped with support plates on both sides to support the electrode sheets.

4. The thermal bonding device as described in claim 1, characterized in that, At least one of the relatively arranged film-coating rollers can be driven to rotate actively, and at least one can be driven to approach the other film-coating roller.

5. The thermal composite device as described in claim 2, characterized in that, The correction roller is rotatably mounted on a correction fixing base, and the correction fixing base has a first inclined surface above the surface facing the discharge direction of the electrode strip.

6. The thermal composite device as described in claim 1, characterized in that, The film-coating roller is rotatably mounted on a film-coating fixing base, and the surface of the film-coating roller fixing base facing the correction mechanism is provided with a second inclined surface.

7. The thermal composite device as described in claim 1, characterized in that, The hot pressing mechanism includes a first hot pressing roller and a second hot pressing roller arranged opposite to each other. An adjustment mechanism is provided on one side of the hot pressing mechanism. The adjustment mechanism includes a first passing roller. The first passing roller is driven by a separation drive member to drive the composite material strip to separate from the first hot pressing roller and the second hot pressing roller.

8. The thermal composite device as described in claim 7, characterized in that, The hot pressing mechanism is configured in two groups, and the adjustment mechanism is located between the two groups of hot pressing mechanisms.

9. The thermal composite device as described in claim 7, characterized in that, The adjustment mechanism further includes a second guide roller, which is driven by a buffer drive to buffer the composite strip.

10. The thermal composite device as described in claim 9, characterized in that, Two first guide rollers are provided, and a second guide roller is provided between the two first guide rollers. The composite strip passes around the first guide rollers and the second guide rollers. The second guide roller is in contact with the upper surface of the composite strip, and the first guide roller is in contact with the lower surface of the composite strip.

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