Turn-back type double-sided dry electrode production equipment

Abstract

The utility model discloses turn-back type double-sided dry electrode production equipment which comprises a first rolling mechanism, a second rolling mechanism and a winding mechanism, and further comprises an unwinding mechanism, a calendaring mechanism and a first traction mechanism, the unwinding mechanism is used for unwinding a current collector and supporting the current collector compounded with a first electrode diaphragm, and the calendaring mechanism is used for supporting the current collector compounded with a second electrode diaphragm; the calendaring mechanism is used for calendaring a dry electrode, the first traction mechanism is used for pulling a current collector compounded with a first electrode diaphragm and supporting the current collector, and the first rolling mechanism, the first traction mechanism, the unwinding mechanism, the second rolling mechanism, the calendaring mechanism and the winding mechanism are sequentially arranged from left to right. According to the utility model, the risk that the current collector is wrinkled can be avoided, the production time can be saved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, specifically to a folded-back double-sided dry electrode production equipment. Background Technology

[0002] Currently, dry electrodes are generally produced using dry electrode production equipment.

[0003] Existing dry electrode production equipment generally includes, from left to right, an unwinding mechanism, a first rolling mechanism, a traction mechanism, a second rolling mechanism, and a winding mechanism. In practical applications, an automatic feeding device is typically installed to the left of the first rolling mechanism (between the first rolling mechanism and the unwinding mechanism) and to the right of the second rolling mechanism (between the second rolling mechanism and the winding mechanism). The electrode powder is fed to the first rolling mechanism via the automatic feeding device between the first rolling mechanism and the unwinding mechanism. The first rolling mechanism rolls the electrode powder into a first electrode film. The first electrode film, after being thinned, is laminated onto one side of the current collector unwound by the unwinding mechanism. The current collector with the laminated first electrode film is tractioned by the traction mechanism. Electrode powder is fed to the second rolling mechanism by an automatic feeding device between the second rolling mechanism and the winding mechanism. The second rolling mechanism rolls the electrode powder into a second electrode film, thins the second electrode film, and laminates the thinned second electrode film onto the other side of the current collector to form a dry electrode. Finally, the dry electrode is wound up by the winding mechanism.

[0004] In the above structure, since the current collector unwound by the unwinding mechanism travels from left to right, the unwound current collector needs to pass over the automatic feeding device between the first rolling mechanism and the unwinding mechanism. The height of the automatic feeding device is generally higher than the height of the unwinding mechanism, the first rolling mechanism, and the second rolling mechanism. This makes the current collector travel at a relatively high height, which increases the risk of wrinkles in the current collector. At the same time, this type of dry electrode production equipment cannot compact or thin the dry electrode to improve its energy density. After the dry electrode is wound up, it needs to be completed by other calendering equipment, which increases production time and reduces production efficiency. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, this utility model provides a folded-back double-sided dry electrode production equipment, which can avoid the risk of wrinkles in the current collector, save production time, and improve production efficiency.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A folding-back double-sided dry electrode production device includes a first rolling mechanism, a second rolling mechanism, and a winding mechanism. The first rolling mechanism is used to roll electrode powder into a first electrode film, thin the first electrode film, and laminate the thinned first electrode film onto one side of a current collector. The second rolling mechanism is used to roll electrode powder into a second electrode film, thin the second electrode film, and laminate the thinned second electrode film onto the other side of the current collector to form a dry electrode. The winding mechanism is used to wind the dry electrode. The device also includes an unwinding mechanism, a calendering mechanism, and a first traction mechanism. The unwinding mechanism is used to unwind the current collector and support the current collector with the laminated first electrode film. The calendering mechanism is used to calender the dry electrode. The first traction mechanism is used to calender the current collector with the laminated first electrode film. The current collector of the electrode film is traction and supported. The first rolling mechanism, the first traction mechanism, the unwinding mechanism, the second rolling mechanism, the calendering mechanism, and the winding mechanism are arranged sequentially from left to right. The unwinding mechanism is also used to support the current collector with the first electrode film. The current collector unwound by the unwinding mechanism passes through the first traction mechanism and the first rolling mechanism from right to left. After the first electrode film, which has been thinned, is laminated onto one side of the current collector by the first rolling mechanism, the current collector with the first electrode film laminated passes through the first traction mechanism, the unwinding mechanism, and the second rolling mechanism from left to right. After the second rolling mechanism, which has been thinned, is laminated onto the other side of the current collector to form a dry electrode, the dry electrode first passes through the calendering mechanism and is then wound up by the winding mechanism.

[0008] As a preferred technical solution, both the first and second rolling mechanisms include a rolling mill frame and a roll assembly. The roll assembly includes a first roll, multiple second rolls, and a third roll. The two ends of the first, second, and third rolls are rotatably mounted on the rolling mill frame. The first roll, multiple second rolls, and third roll of the first rolling mechanism are arranged sequentially from left to right, and the first roll, multiple second rolls, and third roll of the second rolling mechanism are arranged sequentially from right to left. A film-forming gap exists between the first roll and adjacent second rolls, and a thinning gap exists between two adjacent second rolls. The third roll... A composite gap exists between the first roll and the adjacent second roll. The width of the film-forming gap and the multiple thinning gaps gradually decreases along the direction close to the composite gap. One end of the first roll is connected to a first roll drive assembly, which is mounted on the roll press stand and is used to drive the first roll to rotate. One end of the second roll is connected to a second roll drive assembly, which is mounted on the roll press stand and is used to drive the second roll to rotate. One end of the third roll is connected to a third roll drive assembly, which is mounted on the roll press stand and is used to drive the third roll to rotate.

[0009] As a preferred technical solution, the system further includes a first process correction mechanism and a second process correction mechanism. The first process correction mechanism is disposed on the roll press frame of the first roll pressing mechanism and is located to the right of and above the third roll of the first roll pressing mechanism. The second process correction mechanism is disposed on the roll press frame of the second roll pressing mechanism and is located to the left of and above the third roll of the second roll pressing mechanism.

[0010] As a preferred technical solution, both the first process correction mechanism and the second process correction mechanism include a correction linear motor, a correction mounting plate disposed at the top of the correction linear motor, and two correction rollers. The correction linear motor of the first process correction mechanism is disposed on the roller press frame of the first roller pressing mechanism, and the correction linear motor of the second process correction mechanism is disposed on the roller press frame of the second roller pressing mechanism. The two correction rollers are arranged side by side, and the two ends of the correction rollers are rotatably disposed at the top of the correction mounting plate. The correction linear motor is used to drive the correction mounting plate to move back and forth.

[0011] As a preferred technical solution, the system further includes a first CCD detection mechanism and a second CCD detection mechanism. The first CCD detection mechanism is mounted on the roll press frame of the first roll pressing mechanism and is located below the roll assembly of the first roll pressing mechanism. The second CCD detection mechanism is mounted on the roll press frame of the second roll pressing mechanism and is located below the roll assembly of the second roll pressing mechanism. Both the first and second CCD detection mechanisms include a detection support roller and a CCD camera. The two ends of the detection support roller of the first CCD detection mechanism are rotatably mounted on the roll press frame of the first roll pressing mechanism, and the two ends of the detection support roller of the second CCD detection mechanism are rotatably mounted on the roll press frame of the second roll pressing mechanism. The CCD camera of the first CCD detection mechanism is mounted on the roll press frame of the first roll pressing mechanism, and the CCD camera of the second CCD detection mechanism is mounted on the roll press frame of the second roll pressing mechanism. The CCD camera is located above the detection support roller, and the lens of the CCD camera is opposite to the detection support roller.

[0012] As a preferred technical solution, the calendering mechanism includes a calendering frame, a lower calendering roll, an upper calendering roll, two lifting drive components, an upper calendering roll drive assembly, and a lower calendering roll drive assembly. Two upper calendering bearing seats are respectively fitted around the outer periphery of both ends of the upper calendering roll, and the two upper calendering bearing seats are respectively fixedly mounted on the calendering frame. Two lower calendering bearing seats are respectively fitted around the outer periphery of both ends of the lower calendering roll, and the two lower calendering bearing seats are respectively slidably mounted on the calendering frame. The upper and lower calendering rolls are arranged vertically opposite each other with a calendering gap between them. The two lower calendering bearing seats are located below the two upper calendering bearing seats. Two lifting drive components are respectively mounted on the calender frame and located below the two lower calender bearing seats. The output ends of the two lifting drive components are respectively connected to the two lower calender bearing seats. The two lifting drive components are used to drive the two lower calender bearing seats to move up and down. The upper calender roll drive assembly and the lower calender roll drive assembly are both mounted on the calender frame. One end of the upper calender roll is connected to the upper calender roll drive assembly, which is used to rotate the upper calender roll. One end of the lower calender roll is connected to the lower calender roll drive assembly, which is used to drive the lower calender roll to rotate.

[0013] As a preferred technical solution, it further includes a front stretching mechanism and a rear stretching mechanism, which are arranged symmetrically from left to right. The lower calendering roll and the upper calendering roll are located between the front stretching mechanism and the rear stretching mechanism. Both the front stretching mechanism and the rear stretching mechanism include a tension isolation component, a tension swing roll component, and a tension detection roll, which are arranged sequentially along the direction close to the lower calendering roll and the upper calendering roll.

[0014] As a preferred technical solution, a second traction mechanism is further included, disposed between the second rolling mechanism and the calendering mechanism. Both the first and second traction mechanisms include a traction frame, a traction steel roller, a traction steel roller drive assembly, a traction rubber roller located above and opposite the traction steel roller, two traction connecting shafts arranged in a front-to-back orientation, two traction swing arms arranged in a front-to-back orientation, and two traction cylinders. The two ends of the traction steel roller are rotatably mounted on the traction frame. The traction rubber roller is rotatably mounted between the first ends of the two traction swing arms. The first ends of the two traction connecting shafts are respectively mounted on the traction frame. The two traction swing arms are rotatably mounted on the traction frame. Two traction cylinders are mounted on the outer periphery of the second end of the two traction connecting shafts. The cylinders are respectively mounted on the traction frame and located to the right of the two traction swing arms. The cylinders are perpendicular to the swing arms, and their output ends are connected to the swing arms. The cylinders drive the swing arms to rotate left and right around the axis of their respective traction connecting shafts, thereby moving the traction rubber roller away from or towards the traction steel roller. A traction steel roller drive assembly is mounted on the traction frame, with one end of the traction steel roller connected to it. This assembly drives the traction steel roller to rotate.

[0015] As a preferred technical solution, the first traction mechanism further includes a traction guide roller, which is located above the traction steel roller and traction rubber pressure roller of the first traction mechanism. The two ends of the traction guide roller are rotatably mounted on the traction frame of the first traction mechanism. The unwinding mechanism includes an unwinding frame, an unwinding shaft, an unwinding motor, and an unwinding guide roller. The two ends of the unwinding shaft are rotatably mounted on the unwinding frame. The unwinding motor is mounted on the unwinding frame. One end of the unwinding shaft is connected to the output end of the unwinding motor. The unwinding motor is used to drive the unwinding shaft to rotate. The unwinding guide roller is located below the unwinding shaft. The two ends of the unwinding guide roller are rotatably mounted on the unwinding frame.

[0016] As a preferred technical solution, the system further includes a first surface density thickness measuring machine, a second surface density thickness measuring machine, and a third surface density thickness measuring machine. The first surface density thickness measuring machine is disposed between the unwinding mechanism and the second rolling mechanism, or disposed between the first traction mechanism and the second rolling mechanism and located within the support platform. The second surface density thickness measuring machine is disposed between the second rolling mechanism and the second traction mechanism. The third surface density thickness measuring machine is disposed between the calendering mechanism and the winding mechanism.

[0017] The beneficial effects of this utility model are as follows: This utility model, through the arrangement of a first roller pressing mechanism, an unwinding mechanism, a second roller pressing mechanism, a winding mechanism, a calendering mechanism, and a first traction mechanism, and with these mechanisms arranged sequentially from left to right, allows the unwound current collector to avoid passing over the automatic feeding device located to the left of the first roller pressing mechanism, thus reducing the height of the current collector's conveyor belt and avoiding the risk of wrinkles. Simultaneously, the calendering mechanism enables the calendering of the dry electrode, thereby compacting and thinning it, increasing its energy density. Since the calendering of the dry electrode does not require additional calendering equipment, it saves production time and improves production efficiency. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of a folding-back double-sided dry electrode production equipment provided in one embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the first roller pressing mechanism, the first process correction mechanism, and the first CCD detection mechanism of the folding-back double-sided dry electrode production equipment shown.

[0021] Figure 3 yes Figure 2 The diagram shown is a structural schematic of the first process correction mechanism;

[0022] Figure 4 yes Figure 1 The diagram shows the structure of the unwinding mechanism of the folding-back double-sided dry electrode production equipment.

[0023] Figure 5 yes Figure 1 The schematic diagram shows the structure of the second roller pressing mechanism, the second process correction mechanism, and the second CCD detection mechanism of the folding-back double-sided dry electrode production equipment.

[0024] Figure 6 yes Figure 1 The diagram shows the structure of the winding mechanism in the folding-back double-sided dry electrode production equipment.

[0025] Figure 7 yes Figure 1 The diagram shows the structure of the calendering mechanism, the front stretching mechanism, and the rear stretching mechanism of the folding-back double-sided dry electrode production equipment.

[0026] Figure 8 yes Figure 7 A schematic diagram of the tension isolation assembly of the front tensioning mechanism is shown.

[0027] Figure 9 yes Figure 7 A schematic diagram of the tension roller assembly of the front tensioning mechanism is shown.

[0028] Figure 10 yes Figure 1 A schematic diagram of the first traction mechanism of the reversible double-sided dry electrode production equipment shown.

[0029] Figure 11 yes Figure 10 The diagram shows the structure of the first traction mechanism, including the traction steel roller, traction rubber roller, two traction connecting shafts, two traction swing arms, and two traction cylinders.

[0030] Figure 12 yes Figure 1 The diagram shows the structure of the second traction mechanism in the reversible double-sided dry electrode production equipment.

[0031] Figure label:

[0032] 10. First roller pressing mechanism; 11. Roller press frame; 121. First roll; 122. Second roll; 123. Third roll; 13. First roll pressing roll; 14. Second roll pressing roll;

[0033] 20. Unwinding mechanism; 21. Unwinding frame; 22. Unwinding roller;

[0034] 30. Second roller pressing mechanism;

[0035] 40. Rewinding mechanism; 41. Rewinding frame;

[0036] 50. Calendering mechanism; 51. Calendering stand; 52. Lower calendering roll; 53. Upper calendering roll; 54. First calendering pass roll; 55. Second calendering pass roll;

[0037] 60. First traction mechanism; 61. Traction frame; 62. Traction steel roller; 63. Traction rubber pressure roller; 64. Traction swing arm; 65. Traction cylinder; 66. Traction guide roller; 67. Traction support roller;

[0038] 70. Second traction mechanism; 80. First surface density and thickness measuring integrated machine; 90. Second surface density and thickness measuring integrated machine; 100. Third surface density and thickness measuring integrated machine;

[0039] 110. First-process correction mechanism; 1101. Correction linear motor; 1102. Correction mounting plate; 1103. Correction roller; 1104. Vertical plate;

[0040] 120. Second process correction mechanism;

[0041] 130. First CCD inspection mechanism; 1301. Inspection support roller; 1302. CCD camera;

[0042] 140. Second CCD testing agency;

[0043] 150. Front tensioning mechanism; 1501. Partition steel roller; 1502. Partition rubber pressure roller; 1503. Partition swing arm; 1504. Partition cylinder; 1505. Rotating roller; 1506. Swing roller swing arm; 1507. Swing roller;

[0044] 160. Rear tensioning mechanism;

[0045] 300. Automatic feeding equipment. Detailed Implementation

[0046] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0047] Please refer to Figure 1This utility model provides a folding-type double-sided dry electrode production equipment, comprising a first rolling mechanism 10, an unwinding mechanism 20, a second rolling mechanism 30, a winding mechanism 40, a calendering mechanism 50, a first traction mechanism 60, a second traction mechanism 70, a first surface density thickness measuring machine 80, a second surface density thickness measuring machine 90, a third surface density thickness measuring machine 100, a first process correction mechanism 110, a second process correction mechanism 120, a first CCD detection mechanism 130, a second CCD detection mechanism 140, a front stretching mechanism 150, and a rear stretching mechanism 160. The first rolling mechanism 10, the first traction mechanism 60, the unwinding mechanism 20, the first surface density thickness measuring machine 80, the second rolling mechanism 30, the second surface density thickness measuring machine 90, the second traction mechanism 70, the calendering mechanism 50, the third surface density thickness measuring machine 100, and the winding mechanism 40 are arranged sequentially from left to right. The first rolling mechanism 10 is used to roll electrode powder into a first electrode film, thin the first electrode film, and laminate the thinned first electrode film onto one side of the current collector. The second rolling mechanism 30 is used to roll electrode powder into a second electrode film, thin the second electrode film, and laminate the thinned second electrode film onto the other side of the current collector to form a dry electrode. The unwinding mechanism 20 is used to unwind the current collector and support the current collector with the laminated first electrode film. The winding mechanism 40 is used to wind the dry electrode. The calendering mechanism 50 is used to calender the dry electrode to compact and thin it, thereby improving the energy density of the dry electrode. The first traction mechanism 60 is used to traction the current collector with the laminated first electrode film and support the current collector. The second traction mechanism 70 is used to traction the dry electrode. The first integrated density and thickness gauge 80 is used to detect the thickness of the current collector with the first electrode film. The second integrated density and thickness gauge 90 is used to detect the thickness of the dry electrode before it is compacted by the calendering mechanism 50. The third integrated density and thickness gauge 100 is used to detect the thickness of the dry electrode after it is compacted by the calendering mechanism 50. The first process correction mechanism 110 is used to correct the current collector, ensuring that the two sides of the first electrode film and the two sides of the current collector are aligned, thus improving the quality of the dry electrode. The second process correction mechanism 120 is used to correct the current collector with the first electrode film, ensuring that the two sides of the second electrode film and the two sides of the current collector are aligned, thus improving the quality of the dry electrode. The first CCD detection mechanism 130 is used to detect whether the two sides of the first electrode film and the two sides of the current collector are aligned and to detect whether the first electrode film has defects. The second CCD detection mechanism 140 is used to detect whether the two sides of the second electrode film and the two sides of the current collector are aligned and to detect whether the second electrode film has defects.The front stretching mechanism 150 is used to interrupt the tension of the dry electrode before it is rolled by the rolling mechanism 50, to detect the tension of the dry electrode, and to adjust the tension of the dry electrode according to the detected tension value. The rear stretching mechanism 160 is used to interrupt the tension of the dry electrode after it is rolled by the rolling mechanism 50, to detect the tension of the dry electrode, and to adjust the tension of the dry electrode according to the detected tension value. The current collector unwound by the unwinding mechanism 20 passes sequentially from right to left through the first traction mechanism 60, the first process correction mechanism 110, and the first rolling mechanism 10. After the first electrode film, which has undergone thinning treatment, is laminated onto one side of the current collector by the first rolling mechanism 10, the current collector with the laminated first electrode film passes sequentially from left to right through the first CCD detection mechanism 130, the first traction mechanism 60, the unwinding mechanism 20, the first surface density thickness measuring machine 80, and the second rolling mechanism 30. After the second electrode film, which has undergone thinning treatment, is laminated onto the other side of the current collector by the second rolling mechanism 30 to form a dry electrode, the dry electrode passes sequentially from left to right through the second surface density thickness measuring machine 90, the second traction mechanism 70, the calendering mechanism 50, and the third surface density thickness measuring machine 100, and is then wound up by the winding mechanism 40.

[0048] Specifically, in combination Figure 2 , Figure 3 and Figure 5 As shown, both the first roller pressing mechanism 10 and the second roller pressing mechanism 30 include a roller pressing frame 11 and a roll assembly.

[0049] The roll assembly includes a first roll 121, a plurality of second rolls 122, and a third roll 123. The two ends of the first roll 121, the second rolls 122, and the third roll 123 are rotatably mounted on the roll press frame 11. In the first roll pressing mechanism 10, the first roll 121, the plurality of second rolls 122, and the third roll 123 are arranged sequentially from left to right. In the second roll pressing mechanism 30, the first roll 121, the plurality of second rolls 122, and the third roll 123 are arranged sequentially from right to left. A film-forming gap exists between the first roll 121 and adjacent second rolls 122, a thinning gap exists between two adjacent second rolls 122, and a composite gap exists between the third roll 123 and adjacent second rolls 122. The widths of the film-forming gap and the plurality of thinning gaps gradually decrease towards the composite gap. In practical applications, the rotation direction of the first roll 121 is opposite to that of the adjacent second roll 122, the rotation directions of two adjacent second rolls 122 are opposite, and the rotation direction of the third roll 123 is opposite to that of the adjacent second roll 122.

[0050] In this embodiment, there are four second rollers 122, resulting in three thinning gaps. The first roller pressing mechanism 10 of this invention can perform three thinning processes on the first electrode film, and the second roller pressing mechanism 30 can perform three thinning processes on the second electrode film. It is understood that the number of second rollers 122 can also be, for example, two, three, five, six, etc., and can be set according to the actual situation.

[0051] In this embodiment, the two ends of the first roll 121 are rotatably mounted on the roll press frame 11 via two first roll bearing seats, the two ends of the second roll 122 are rotatably mounted on the roll press frame 11 via two second roll bearing seats, and the two ends of the third roll 123 are rotatably mounted on the roll press frame 11 via two third roll bearing seats.

[0052] One end of the first roll 121 is connected to the first roll drive assembly, which is mounted on the roll press frame 11 and is used to drive the first roll 121 to rotate. One end of the second roll 122 is connected to the second roll drive assembly, which is mounted on the roll press frame 11 and is used to drive the second roll 122 to rotate. One end of the third roll 123 is connected to the third roll drive assembly, which is mounted on the roll press frame 11 and is used to drive the third roll 123 to rotate. In this embodiment, the first, second, and third roll drive assemblies each include a roll reducer and a roll motor. The roll reducer is mounted on the roll press frame 11, and the roll motor is mounted on the roll reducer. The output end of the roll motor is connected to the input end of the roll reducer. The output end of the roll reducer in the first roll drive assembly is connected to one end of the first roll 121, the output end of the roll reducer in the second roll drive assembly is connected to one end of the second roll 122, and the output end of the roll reducer in the third roll drive assembly is connected to one end of the third roll 123. The roll motor is used to drive the corresponding roll to rotate via the roll reducer.

[0053] In this embodiment, a first roller pressing roller 13 and a second roller pressing roller 14 are respectively provided above and below the composite gap. The two ends of the first roller pressing roller 13 and the second roller pressing roller 14 are rotatably mounted on the roller press frame 11 through two roller pressing bearing seats. The first roller pressing roller 13 is used to support the current collector, and the second roller pressing roller 14 is used to support the current collector with the first electrode film composited on it. The first roller pressing roller 13 and the second roller pressing roller 14 ensure that the current collector passes through the composite gap in a vertical direction, which facilitates the composite of the first electrode film onto one side of the current collector.

[0054] The first process correction mechanism 110 is mounted on the roll press frame 11 of the first roll pressing mechanism 10, and is located to the right and above the third roll 123 of the first roll pressing mechanism 10. The second process correction mechanism 120 is mounted on the roll press frame 11 of the second roll pressing mechanism 30, and is located to the left and above the third roll 123 of the second roll pressing mechanism 30.

[0055] Both the first-process correction mechanism 110 and the second-process correction mechanism 120 include a correction linear motor 1101, a correction mounting plate 1102 disposed at the top of the correction linear motor 1101, and two correction rollers 1103. The correction linear motor 1101 of the first-process correction mechanism 110 is disposed on the roller press frame 11 of the first roller pressing mechanism 10, and the correction linear motor 1101 of the second-process correction mechanism 120 is disposed on the roller press frame 11 of the second roller pressing mechanism 30. The two correction rollers 1103 are arranged side by side, and the two ends of the correction rollers 1103 are rotatably disposed at the top of the correction mounting plate 1102. The correction linear motor 1101 is used to drive the correction mounting plate 1102 to move back and forth, thereby driving the two correction rollers 1103 to move back and forth.

[0056] In this embodiment, the top of the correction mounting plate 1102 is provided with two vertical plates 1104 arranged in a front-to-back manner. The vertical plates 1104 are provided with mounting holes corresponding to the correction roller 1103. The two ends of the correction roller 1103 are respectively rotatably mounted in the mounting holes of the two vertical plates 1104 through two correction bearings.

[0057] The first CCD detection mechanism 130 is disposed on the roll press frame 11 of the first roll pressing mechanism 10, and is located below the roll assembly of the first roll pressing mechanism 10. The second CCD detection mechanism 140 is disposed on the roll press frame 11 of the second roll pressing mechanism 30, and is located below the roll assembly of the second roll pressing mechanism 10.

[0058] Both the first CCD inspection mechanism 130 and the second CCD inspection mechanism 140 include an inspection support roller 1301 and a CCD camera 1302. The two ends of the inspection support roller 1301 of the first CCD inspection mechanism 130 are rotatably mounted on the roller press frame 11 of the first roller pressing mechanism 10 via two support roller bearing seats. Similarly, the two ends of the inspection support roller 1301 of the second CCD inspection mechanism 140 are rotatably mounted on the roller press frame 11 of the second roller pressing mechanism 30 via two support roller bearing seats. The inspection support roller 1301 is located to the right of the second roller press over roller 14. The inspection support roller 1301 of the first CCD inspection mechanism 130 is used to support the current collector with the first electrode film composited on it, and the inspection support roller 1301 of the second CCD inspection mechanism 140 is used to support the dry electrode. The CCD camera 1302 of the first CCD inspection mechanism 130 is mounted on the roller frame 11 of the first roller pressing mechanism 10 via a bracket, and the CCD camera 1302 of the second CCD inspection mechanism 140 is mounted on the roller frame 11 of the second roller pressing mechanism 30 via a bracket. The CCD camera 1302 is located above the inspection support roller 1301, and the lens of the CCD camera 1302 is opposite to the inspection support roller 1301. In this embodiment, the detection support roller 1301 of the first CCD detection mechanism 130 corresponds to the first process correction mechanism 110. The CCD camera 1302 of the first CCD detection mechanism 130 is inclined upward and corresponds to the space between the detection support roller 1301 of the first CCD detection mechanism 130 and the end of the roll press frame 11 near the unwinding mechanism 20. The detection support roller 1301 of the second CCD detection mechanism 140 corresponds to the first second roll 122 of the second roll pressing mechanism 30. The CCD camera 1302 of the second CCD detection mechanism 140 is inclined upward and corresponds to the space between the detection support roller 1301 of the second CCD detection mechanism 140 and the end of the roll press frame 11 away from the unwinding mechanism 20. The CCD camera 1302 of the first CCD inspection unit 130 is used to photograph the current collector with the first electrode film. After the photographed image is transmitted to the image processing system, the image processing system processes and analyzes the current collector with the first electrode film to determine whether the two sides of the first electrode film and the two sides of the current collector are aligned and whether the first electrode film has defects. This achieves the detection of whether the two sides of the first electrode film and the two sides of the current collector are aligned and whether the first electrode film has defects. The CCD camera 1302 of the second CCD inspection unit 140 is used to photograph the dry electrode. After the photographed image is transmitted to the image processing system, the image processing system processes and analyzes the dry electrode to determine whether the two sides of the second electrode film and the two sides of the current collector are aligned and whether the second electrode film has defects. This achieves the detection of whether the two sides of the second electrode film and the two sides of the current collector are aligned and whether the second electrode film has defects.

[0059] Combination Figure 4 As shown, the unwinding mechanism 20 includes an unwinding frame 21, an unwinding shaft, an unwinding motor, and an unwinding guide roller 22.

[0060] The unwinding shaft is rotatably mounted on the unwinding frame 21 via two unwinding bearing seats at both ends. The unwinding shaft is used to unwind the current collector. The unwinding motor is mounted on the unwinding frame 21, and one end of the unwinding shaft is connected to the output end of the unwinding motor, which drives the unwinding shaft to rotate.

[0061] The unwinding roller 22 is located below the unwinding shaft. The unwinding roller 22 supports the current collector with the first electrode film composited on it. Both ends of the unwinding roller 22 are rotatably mounted on the unwinding frame 21 via two unwinding roller bearing seats. In this embodiment, there are two unwinding rollers 22, arranged side-by-side. It is understood that the number of unwinding rollers 22 does not constitute a limitation on this invention.

[0062] Combination Figure 6 As shown, the winding mechanism 40 includes a winding frame 41, a winding shaft, and a winding motor. Both ends of the winding shaft are rotatably mounted on the winding frame 41 via two winding bearing seats. The winding shaft is used to wind up the dry electrode. The winding motor is mounted on the winding frame 41, and one end of the winding shaft is connected to the output end of the winding motor. The winding motor is used to drive the winding shaft to rotate.

[0063] Combination Figures 7 to 9 As shown, the calendering mechanism 50 includes a calendering frame 51, an upper calendering roll 53, a lower calendering roll 52, two lifting drive components arranged in a front-to-back configuration, an upper calendering roll drive assembly, and a lower calendering roll drive assembly. Two upper calendering bearing seats are respectively fitted onto the outer periphery of both ends of the upper calendering roll 53, and these two upper calendering bearing seats are fixedly mounted on the calendering frame 51. Two lower calendering bearing seats are respectively fitted onto the outer periphery of both ends of the lower calendering roll 52, and these two lower calendering bearing seats are slidably mounted on the calendering frame 51. The upper calendering roll 53 and the lower calendering roll 52 are arranged vertically opposite each other, with a calendering gap between them. The two lower calendering bearing seats are located below the two upper calendering bearing seats. Two lifting drive components are respectively mounted on the calender frame 51 and located below the two lower calender bearing seats. The output ends of the two lifting drive components are connected to the two lower calender bearing seats respectively. The two lifting drive components are used to drive the two lower calender bearing seats to move up and down, thereby driving the lower calender roll 52 to move up and down. By moving the lower calender roll 52 upward, upward pressure can be applied to provide calendering pressure. In practical applications, the rotation direction of the lower calender roll 52 is opposite to the rotation direction of the upper calender roll 51. The lifting drive component is a hydraulic cylinder or an electric cylinder.

[0064] Both the upper calendering roll drive assembly and the lower calendering roll drive assembly are mounted on the calendering frame 51. One end of the upper calendering roll 53 is connected to the upper calendering roll drive assembly, which drives the upper calendering roll 53 to rotate. One end of the lower calendering roll 52 is connected to the lower calendering roll drive assembly, which drives the lower calendering roll 51 to rotate. Specifically, the upper calendering roll drive assembly includes an upper calendering reducer and an upper calendering motor. The upper calendering reducer is mounted on the calendering frame 51, and the upper calendering motor is mounted on the upper calendering reducer. The output end of the upper calendering motor is connected to the input end of the upper calendering reducer, and the output end of the upper calendering reducer is connected to one end of the upper calendering roll 53. The upper calendering motor drives the upper calendering roll 53 to rotate via the upper calendering reducer. The lower calendering roll drive assembly includes a lower calendering reducer and a lower calendering motor. The lower calendering reducer is mounted on the calendering frame 51, and the lower calendering motor is mounted on the lower calendering reducer. The output end of the lower calendering motor is connected to the input end of the lower calendering reducer, and the output end of the lower calendering reducer is connected to one end of the lower calendering roll 52. The lower calendering motor is used to drive the lower calendering roll 52 to rotate through the lower calendering reducer.

[0065] In this embodiment, a first calendering roller 54 and a second calendering roller 55 are respectively provided on the left and right sides of the calendering gap. The two ends of the first calendering roller 54 and the second calendering roller 55 are rotatably mounted on the calendering frame 51 through two calendering roller bearing seats. The first calendering roller 54 and the second calendering roller 55 are used to support the dry electrode. The first calendering roller 54 and the second calendering roller 55 ensure that the dry electrode passes through the calendering gap in the horizontal direction, which facilitates the calendering of the dry electrode by the upper calendering roller 53 and the lower calendering roller 52.

[0066] The front stretching mechanism 150 and the rear stretching mechanism 160 are arranged symmetrically from left to right, with the lower calendering roll 52 and the upper calendering roll 53 located between them. Both the front stretching mechanism 150 and the rear stretching mechanism 160 include a tension isolation assembly, a tension oscillating roll assembly, and a tension detection roll, arranged sequentially along the direction closest to the lower calendering roll 52 and the upper calendering roll 53. The tension isolation assembly is used to isolate the tension of the dry electrode, the tension detection roll is used to detect the tension of the dry electrode, and the tension oscillating roll assembly is used to adjust the tension of the dry electrode according to the detected tension value. By isolating and adjusting the tension of the dry electrode through the front stretching mechanism 150 and the rear stretching mechanism 160, the dry electrode can be calendered by the calendering mechanism 50.

[0067] Specifically, the tension isolation assembly includes a isolation steel roller 1501, an isolation rubber pressure roller 1502 opposite to the isolation steel roller 1501, two isolation connecting shafts arranged in a front-to-back orientation, two isolation swing arms 1503 arranged in a front-to-back orientation, and two isolation cylinders 1504 arranged in a front-to-back orientation.

[0068] The two ends of the partition steel roller 1501 are rotatably mounted on the calender frame 51 via two partition steel roller bearing seats. The partition rubber pressure roller 1502 is located to the upper left of the partition steel roller 1501 and is rotatably mounted between two partition swing arms 1503. In this embodiment, the center positions of the two partition swing arms 1503 are respectively provided with first mounting holes, and the two ends of the partition rubber pressure roller 1502 are rotatably mounted in the first mounting holes of the two partition swing arms 1503 via partition bearings. Two partition connecting shafts are located between the partition rubber pressure roller 1502 and the lower calender roller 52 and the upper calender roller 53, and the first ends of the two partition connecting shafts are respectively mounted on the calender frame 51. The partition swing arms 1503 are inclined upwards towards the lower calendering roller 52 and the upper calendering roller 53. The first ends of the two partition swing arms 1503 are rotatably sleeved on the outer periphery of the second ends of the two partition connecting shafts. In this embodiment, the first end of the partition swing arms 1503 is provided with a second mounting hole. The two partition swing arms 1503 are rotatably sleeved on the outer periphery of the second ends of the two partition connecting shafts through their respective second mounting holes. A swing arm bearing is provided in the second mounting hole. The swing arm bearing is sleeved on the outer periphery of the second end of the corresponding partition connecting shaft to provide rotational support for the corresponding partition swing arm 1503. Two partition cylinders 1504 are respectively mounted on the calender frame 51 and positioned above two partition swing arms 1503. The two partition cylinders 1504 and the two partition swing arms 1503 are arranged vertically. A partition rubber pressure roller 1502 is located between the output ends of the two partition cylinders 1504 and the first ends of the two partition swing arms 1503. The output ends of the two partition cylinders 1504 are respectively connected to the two partition swing arms 1503. The two partition cylinders 1504 are used to drive the two... The partition arm 1503 rotates left and right around the axis of the corresponding partition connecting shaft, thereby driving the partition rubber pressure roller 1502 to move away from or towards the partition steel roller 1501. In practical applications, the dry electrode passes over the partition steel roller 1501 and moves towards the partition steel roller 1501 through the partition rubber pressure roller 1502. Thus, the partition rubber pressure roller 1502 can press the dry electrode onto the partition steel roller 1501, thereby achieving the isolation of the tension of the dry electrode.

[0069] The tension roller assembly includes a rotating roller 1505, two roller arms 1506 arranged in a front-to-back configuration, a roller 1507, and a roller cylinder. The two ends of the rotating roller 1505 are rotatably mounted in two calendering mounting holes on the calender frame 51 via two rotating roller bearings. The first ends of the two roller arms 1506 are fixedly sleeved on the outer periphery of the rotating roller 1505. The roller 1507 is located below the rotating roller 1505 and is rotatably mounted between the second ends of the two roller arms 1506. In this embodiment, the second end of the roller arms 1506 has a through hole, and the two ends of the roller 1507 are rotatably mounted in the through holes of the two roller arms 1506 via two roller bearings. The swing roller cylinder is mounted on the calender frame 51. The output end of the swing roller cylinder is connected to one end of the rotating roller 1505. The swing roller cylinder is used to drive the rotating roller 1505 to rotate, thereby causing the two swing roller arms 1506 to swing left and right around the axis of the rotating roller 1505, thereby causing the swing roller 1507 to swing left and right around the axis of the rotating roller 1505.

[0070] Combination Figures 10 to 12 As shown, both the first traction mechanism 60 and the second traction mechanism 70 include a traction frame 61, a traction steel roller 62, a traction steel roller drive assembly, a traction rubber roller 63 opposite to the traction steel roller 62, two traction connecting shafts arranged in a front-to-back orientation, two traction swing arms 64 arranged in a front-to-back orientation, and two traction cylinders 65. The two ends of the traction steel roller 62 are rotatably mounted on the traction frame 61 via two traction steel roller bearing seats. The traction steel roller drive assembly is mounted on the traction frame 61, and one end of the traction steel roller 62 is connected to the traction steel roller drive assembly, which drives the traction steel roller 62 to rotate. Specifically, the traction steel roller drive assembly includes a traction reducer and a traction motor. The traction reducer is mounted on the traction frame 61, and the traction motor is mounted on the traction reducer. The output end of the traction motor is connected to the input end of the traction reducer, and the output end of the traction reducer is connected to one end of the traction steel roller 62. The traction motor drives the traction steel roller 62 to rotate via the traction reducer.

[0071] The traction rubber pressure roller 63 is located to the upper left of the traction steel roller 62. The traction rubber pressure roller 63 is rotatably disposed between the first ends of the two traction swing arms 64. In this embodiment, the traction swing arms 64 are L-shaped and inclined upwards in a direction away from the first roller pressing mechanism 10. The first end of the traction swing arm 64 is provided with a traction mounting hole. The two ends of the traction rubber pressure roller 63 are respectively rotatably disposed in the traction mounting holes of the two traction swing arms 64 through two traction bearings. The first ends of the two traction connecting shafts are respectively disposed on the traction frame 61. The two traction swing arms 64 are respectively rotatably sleeved on the outer periphery of the second ends of the two traction connecting shafts. In this embodiment, a traction through hole is provided at the center position of the traction swing arm 64. The two traction swing arms 64 are respectively rotatably sleeved on the outer periphery of the second ends of the two traction connecting shafts through their respective traction through holes. A swing arm bearing is provided in the traction through hole. The swing arm bearing is sleeved on the outer periphery of the corresponding traction connecting shaft to provide rotational support for the corresponding traction swing arm 64. Two traction cylinders 65 are respectively mounted on the traction frame 61 and located to the right of the two traction swing arms 64. The two traction cylinders 65 are perpendicular to the two traction swing arms 64. Two traction connecting shafts are located below the two traction cylinders 65 and to the right of the traction rubber rollers 63. The output ends of the two traction cylinders 65 are connected to the two traction swing arms 64. The two traction cylinders 65 are used to drive the two traction swing arms 64 to rotate left and right around the axis of the corresponding traction connecting shaft, thereby driving the traction rubber rollers 63 to move away from or towards the traction steel rollers 62. In practical applications, the current collector with the first electrode diaphragm is drawn from above the traction steel rollers 62 of the first traction mechanism 60. The dry electrode passes over the traction steel roller 62 of the second traction mechanism 70 and moves towards the traction steel roller 62 via the traction rubber roller 63 of the first traction mechanism 60, thereby pressing the current collector with the first electrode diaphragm onto the traction steel roller 62. In this way, the current collector with the first electrode diaphragm can be pressed, clamped, and pulled by the traction rubber roller 63 and the traction steel roller 62 of the first traction mechanism 60. The dry electrode can be pressed onto the traction steel roller 62 by the traction rubber roller 63 of the second traction mechanism 70, thereby pressing, clamping, and pulling the dry electrode.

[0072] The first traction mechanism 60 also includes a traction roller 66, which is located above the traction steel roller 62 and the traction rubber roller 63 of the first traction mechanism 60. Both ends of the traction roller 66 are rotatably mounted on the traction frame 61 of the first traction mechanism 60 via two traction roller bearing seats. The traction roller 66 is used to support the current collector. In this embodiment, there are two traction rollers 66, arranged side-by-side. It is understood that the number of traction rollers 66 does not constitute a limitation on this utility model.

[0073] With the above structure, in practical application, the electrode powder is first fed into the film-forming gap of the first roller pressing mechanism 10 from above by the automatic feeding mechanism 300 located to the left of the first roller pressing mechanism 10. The first roller 121 and the first second roller 122 of the first roller pressing mechanism 10 rotate in opposite directions, thereby pressing the electrode powder into a first electrode film. Then, the first electrode film passes under the first second roller 122 and enters the first thinning gap. The first second roller 122 and the second second roller 122 rotate in opposite directions, thereby pressing the first electrode film and achieving the first thinning process. Then, the first electrode film, after the first thinning process, passes over the second second roller 122 and enters the second thinning gap. The second second roller 122 and the third second roller 122 rotate in opposite directions, thereby pressing the first electrode film and achieving the second thinning process. Then, the first electrode film, after undergoing the second thinning process, passes under the third second roller 122 and enters the third thinning gap. The third and fourth second rollers 122 rotate in opposite directions, thus rolling the first electrode film and achieving the third thinning process. The first electrode film, after the third thinning process, then passes over the fourth second roller 122 and enters the composite gap. During this process, the unwinding motor drives the unwinding shaft to rotate, thereby unwinding the collector. The unwound collector travels to the left. Specifically, the collector passes over the traction roller 66 located on the right and under the traction roller 66 located on the left of the first traction mechanism 60 in sequence, and then passes over the two correction rollers 1103 of the first process correction mechanism 110. When the collector deviates forward, for example, the correction linear motor 1101 drives the two correction rollers 1103 to move backward, thereby moving the collector backward. This achieves correction of the collector. When the collector deviates backward, for example, the correction linear motor 1101 drives the two correction rollers 1103 to move forward, thereby moving the collector forward. This achieves correction of the collector. Then the current collector passes over the left side of the first roller 13 and enters the composite gap and is located to the right of the first electrode film. It is then rolled by the fourth second roller 122 and the third roller 123 in opposite directions, thereby rolling the first electrode film and the current collector together, thus achieving the composite of the first electrode film on one side of the current collector.Afterwards, the current collector with the first electrode film composited comes out from the composite gap and turns back to the right. It first passes to the left of the second roller 14 of the first roller pressing mechanism 10 and then passes above the detection support roller 1301 of the first CCD detection mechanism 130. At this time, the first electrode film is located above the current collector. The CCD camera 1302 of the first CCD detection mechanism 130 can take pictures of the current collector with the first electrode film composited to detect whether the two sides of the first electrode film and the two sides of the current collector are aligned and to detect whether the first electrode film has defects. If the alignment is not detected or a defect is detected, the machine needs to be stopped for adjustment to ensure the quality of the dry electrode.

[0074] Then, the current collector with the first electrode film is passed over the traction steel roller 62 of the first traction mechanism 60. The current collector with the first electrode film is pressed onto the traction steel roller 62 by the traction rubber pressure roller 63. Under the rotation of the traction steel roller 62, the current collector with the first electrode film can be pressed, clamped and pulled by the traction steel roller 62 and the traction rubber pressure roller 63.

[0075] Then, the current collector with the first electrode film composited is passed under the two unwinding rollers 22 of the unwinding mechanism 20, and then passes through the first surface density thickness gauge 80, which can detect the thickness of the current collector with the first electrode film composited. Then, the current collector with the first electrode film composited is passed over the two correction rollers 1103 of the second process correction mechanism 120. When the current collector with the first electrode film composited is, for example, shifted forward, the two correction rollers 1103 are driven to move backward by the correction linear motor 1101, thereby moving the current collector with the first electrode film composited backward, thus realizing the correction of the current collector with the first electrode film composited. When the current collector with the first electrode film composited is, for example, shifted backward, the two correction rollers 1103 are driven to move forward by the correction linear motor 1101, thereby moving the current collector with the first electrode film composited forward, thus realizing the correction of the current collector with the first electrode film composited. Then, the current collector, which is coated with the first electrode film, passes over the right side of the first roller 13 of the second roller pressing mechanism 30 and enters the composite gap. During this process, the electrode powder is fed into the film-forming gap of the second roller pressing mechanism 30 from above by the automatic feeding mechanism 300 located to the right of the second roller pressing mechanism 30. The first roller 121 and the first second roller 122 of the second roller pressing mechanism 30 rotate in opposite directions, thereby rolling the electrode powder into the second electrode film. Then, the second electrode film passes under the first second roller 122 and enters the first thinning gap. The first second roller 122 and the second second roller 122 rotate in opposite directions, thereby rolling the second electrode film, thus achieving the first thinning process of the second electrode film. The second electrode film, after the first thinning process, then passes over the second roller 122 and enters the second thinning gap. The second and third rollers 122 rotate in opposite directions, thus rolling the second electrode film and achieving a second thinning process. The second electrode film, after the second thinning process, then passes under the third roller 122 and enters the third thinning gap. The third and fourth rollers 122 rotate in opposite directions, thus rolling the second electrode film and achieving a third thinning process.Then, the second electrode film, after undergoing a third thinning process, passes over the fourth second roller 122 and enters the composite gap. At this time, the current collector with the first electrode film is located to the left of the second electrode film and between the first and second electrode films. By rotating the fourth second roller 122 and the third roller 123 in opposite directions, the second electrode film and the current collector with the first electrode film are rolled, thus achieving the bonding of the second electrode film to the other side of the current collector, thereby forming a dry electrode. Then, the dry electrode passes over the left side of the second roller 14 of the second rolling mechanism 30 and over the detection support roller 1301 of the second CCD detection mechanism 140. At this time, the second electrode film is located above the current collector. The CCD camera 1302 of the second CCD detection mechanism 140 can take pictures of the dry electrode to detect whether the two sides of the second electrode film and the two sides of the current collector are aligned and to detect whether the second electrode film has defects. If misalignment or defects are detected, the machine needs to be stopped for adjustment to ensure the quality of the dry electrode.

[0076] The dry electrode then passes through the second surface density and thickness measuring machine 90, which can detect the thickness of the dry electrode before it is compacted by the calendering mechanism 50. The dry electrode then passes over the traction steel roller 62 of the second traction mechanism 70, and is pressed onto the traction steel roller 62 by the traction rubber pressure roller 63. As the traction steel roller 62 rotates, the dry electrode is pressed, clamped, and pulled by the traction steel roller 62 and the traction rubber pressure roller 63.

[0077] The dry electrode then passes over the partition steel roller 1501 of the front stretching mechanism 150. The partition rubber pressure roller 1502 presses the dry electrode firmly onto the partition steel roller 1501, thus isolating the tension of the dry electrode. Next, the dry electrode passes over the right side of the tension swing roller 1507 of the tension swing roller assembly of the front stretching mechanism 150, the left side of the rotating roller 1505, and over the tension detection roller. The tension of the dry electrode is detected by the tension detection roller. The swing roller cylinder drives the swing roller 1507 to swing left or right according to the detected tension value of the dry electrode, thereby adjusting the tension of the dry electrode to prevent it from being too tight or too loose. The dry electrode then enters the calendering gap. The lower calendering roller 52 and the upper calendering roller 53 rotate in opposite directions, thus calendering the dry electrode to compact it. Two lifting drive components drive the lower calendering roller 52 upwards, thereby applying upward pressure to provide calendering pressure. The calendered dry electrode then passes through a third-sided density and thickness gauge 100. The third-sided density and thickness gauge 100 measures the thickness of the dry electrode after it has been compacted by the calendering mechanism 50. The dry electrode is then wound onto a take-up shaft, which is driven to rotate by a take-up motor, thus allowing the dry electrode to be wound up.

[0078] This invention comprises a first roller pressing mechanism 10, an unwinding mechanism 20, a second roller pressing mechanism 30, a winding mechanism 40, a calendering mechanism 50, and a first traction mechanism 60, arranged sequentially from left to right. After the current collector is unwound by the unwinding mechanism 20, it travels from right to left, first passing through the first traction mechanism 60, which supports the current collector. Then it passes through the first roller pressing mechanism 10, where the electrode powder is rolled into a first electrode film, the first electrode film is thinned, and the thinned first electrode film is laminated onto one side of the current collector. The current collector with the laminated first electrode film then travels back to the right, first passing through the first traction mechanism 60, which pulls the current collector with the laminated first electrode film. Finally, it is unwound... Mechanism 20 supports the current collector with the first electrode film, which is then rolled by unwinding mechanism 20. The current collector then passes through second rolling mechanism 30, where electrode powder is rolled into a second electrode film, the second electrode film is thinned, and the thinned second electrode film is laminated to the other side of the current collector to form a dry electrode. The dry electrode then passes through calendering mechanism 50, where it is calendered, and finally wound by winding mechanism 40. Compared to existing technologies, the unwound current collector does not need to pass over the automatic feeding device 300 located to the left of the first rolling mechanism 10, thus reducing the current collector's travel height and avoiding the risk of wrinkles. Simultaneously, the calendering mechanism 50 can calender the dry electrode, compacting and thinning it, thereby increasing its energy density. This calendering of the dry electrode does not require other calendering equipment, saving production time and improving production efficiency.

[0079] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A folding-back double-sided dry electrode production equipment, comprising a first rolling mechanism (10), a second rolling mechanism (30), and a winding mechanism (40), wherein the first rolling mechanism (10) is used to roll electrode powder into a first electrode film, to thin the first electrode film, and to laminate the thinned first electrode film onto one side of a current collector; the second rolling mechanism (30) is used to roll electrode powder into a second electrode film, to thin the second electrode film, and to laminate the thinned second electrode film onto the other side of the current collector to form a dry electrode; and the winding mechanism (40) is used to wind the dry electrode, characterized in that, It also includes an unwinding mechanism (20), a calendering mechanism (50), and a first traction mechanism (60). The unwinding mechanism (20) is used to unwind the current collector and to support the current collector with the first electrode film. The calendering mechanism (50) is used to calender the dry electrode. The first traction mechanism (60) is used to traction the current collector with the first electrode film and to support the current collector. The first rolling mechanism (10), the first traction mechanism (60), the unwinding mechanism (20), the second rolling mechanism (30), the calendering mechanism (50), and the winding mechanism (40) are arranged sequentially from left to right. The current collector unwinding mechanism (20) passes through the first traction mechanism (60) and the first rolling mechanism (10) from right to left. After the first electrode film, which has been thinned, is laminated onto one side of the current collector by the first rolling mechanism (10), the current collector with the first electrode film laminated passes through the first traction mechanism (60), the unwinding mechanism (20), and the second rolling mechanism (30) from left to right. After the second electrode film, which has been thinned, is laminated onto the other side of the current collector by the second rolling mechanism (30) to form a dry electrode, the dry electrode first passes through the calendering mechanism (50) and is then wound up by the winding mechanism (40).

2. The folding-back double-sided dry electrode production equipment according to claim 1, characterized in that, Both the first rolling mechanism (10) and the second rolling mechanism (30) include a rolling mill frame (11) and a roll assembly. The roll assembly includes a first roll (121), a plurality of second rolls (122), and a third roll (123). The two ends of the first roll (121), the second rolls (122), and the third roll (123) are rotatably mounted on the rolling mill frame (11). The first roll (121), the plurality of second rolls (122), and the third roll (123) of the first rolling mechanism (10) are arranged from left to right. The first roll (121), the plurality of second rolls (122), and the third roll (123) of the second rolling mechanism (30) are arranged from right to left. There is a film-forming gap between the first roll (121) and the adjacent second roll (122). The two adjacent second rolls (121) have a film-forming gap. There is a thinning gap between the third roll (123) and the adjacent second roll (122). There is a composite gap between the film-forming gap and the multiple thinning gaps. The width of the film-forming gap and the multiple thinning gaps gradually decreases in the direction close to the composite gap. One end of the first roll (121) is connected to the first roll drive assembly. The first roll drive assembly is set on the roll press frame (11) and is used to drive the first roll (121) to rotate. One end of the second roll (122) is connected to the second roll drive assembly. The second roll drive assembly is set on the roll press frame (11) and is used to drive the second roll (122) to rotate. One end of the third roll (123) is connected to the third roll drive assembly. The third roll drive assembly is set on the roll press frame (11) and is used to drive the third roll (123) to rotate.

3. The folding-back double-sided dry electrode production equipment according to claim 2, characterized in that, It also includes a first process correction mechanism (110) and a second process correction mechanism (120). The first process correction mechanism (110) is disposed on the roller press frame (11) of the first roller pressing mechanism (10). The first process correction mechanism (110) is located to the right of the third roll (123) of the first roller pressing mechanism (10) and above the third roll (123) of the first roller pressing mechanism (10). The second process correction mechanism (120) is disposed on the roller press frame (11) of the second roller pressing mechanism (30). The second process correction mechanism (120) is located to the left of the third roll (123) of the second roller pressing mechanism (30) and above the third roll (123) of the second roller pressing mechanism (30).

4. The folding-back double-sided dry electrode production equipment according to claim 3, characterized in that, The first process correction mechanism (110) and the second process correction mechanism (120) both include a correction linear motor (1101), a correction mounting plate (1102) disposed at the top of the correction linear motor (1101), and two correction rollers (1103). The correction linear motor (1101) of the first process correction mechanism (110) is disposed on the roller press frame (11) of the first roller pressing mechanism (10), and the correction linear motor (1101) of the second process correction mechanism (120) is disposed on the roller press frame (11) of the second roller pressing mechanism (30). The two correction rollers (1103) are arranged side by side. The two ends of the correction rollers (1103) are rotatably disposed at the top of the correction mounting plate (1102). The correction linear motor (1101) is used to drive the correction mounting plate (1102) to move back and forth.

5. The folding-back double-sided dry electrode production equipment according to claim 2, characterized in that, It also includes a first CCD detection mechanism (130) and a second CCD detection mechanism (140). The first CCD detection mechanism (130) is disposed on the roll press frame (11) of the first roll pressing mechanism (10) and is located below the roll assembly of the first roll pressing mechanism (10). The second CCD detection mechanism (140) is disposed on the roll press frame (11) of the second roll pressing mechanism (30) and is located below the roll assembly of the second roll pressing mechanism (30). Both the first CCD detection mechanism (130) and the second CCD detection mechanism (140) include a detection support roller (1301) and a CCD camera (1302). The detection support roller of the first CCD detection mechanism (130) (1301) The two ends of the detection support roller (1301) of the second CCD detection mechanism (140) are rotatably mounted on the roller press frame (11) of the first roller pressing mechanism (10). The two ends of the detection support roller (1301) of the second CCD detection mechanism (140) are rotatably mounted on the roller press frame (11) of the second roller pressing mechanism (30). The CCD camera (1302) of the first CCD detection mechanism (130) is mounted on the roller press frame (11) of the first roller pressing mechanism (10). The CCD camera (1302) of the second CCD detection mechanism (140) is mounted on the roller press frame (11) of the second roller pressing mechanism (30). The CCD camera (1302) is located above the detection support roller (1301), and the lens of the CCD camera (1302) is opposite to the detection support roller (1301).

6. The fold-back double-sided dry electrode production equipment according to claim 1, characterized in that, The calendering mechanism (50) includes a calendering frame (51), a lower calendering roll (52), an upper calendering roll (53), two lifting drive components, an upper calendering roll drive assembly, and a lower calendering roll drive assembly. Two upper calendering bearing seats are respectively fitted around the outer periphery of both ends of the upper calendering roll (53), and the two upper calendering bearing seats are respectively fixedly mounted on the calendering frame (51). Two lower calendering bearing seats are respectively fitted around the outer periphery of both ends of the lower calendering roll (52), and the two lower calendering bearing seats are respectively slidably mounted on the calendering frame (51). The upper calendering roll (53) and the lower calendering roll (52) are arranged vertically opposite each other with a calendering gap between them. The two lower calendering bearing seats are respectively located on the two upper calendering bearing seats. Below, two lifting drive components are respectively set on the calender frame (51) and located below the two lower calender bearing seats. The output ends of the two lifting drive components are respectively connected to the two lower calender bearing seats. The two lifting drive components are respectively used to drive the two lower calender bearing seats to move up and down. The upper calender roll drive assembly and the lower calender roll drive assembly are both set on the calender frame (51). One end of the upper calender roll (53) is connected to the upper calender roll drive assembly. The upper calender roll drive assembly is used to rotate the upper calender roll (53). One end of the lower calender roll (52) is connected to the lower calender roll drive assembly. The lower calender roll drive assembly is used to drive the lower calender roll (52) to rotate.

7. The folding-back double-sided dry electrode production equipment according to claim 6, characterized in that, It also includes a front stretching mechanism (150) and a rear stretching mechanism (160), which are arranged symmetrically from left to right. The lower calendering roller (52) and the upper calendering roller (53) are located between the front stretching mechanism (150) and the rear stretching mechanism (160). Both the front stretching mechanism (150) and the rear stretching mechanism (160) include a tension isolation assembly, a tension swing roller assembly and a tension detection roller. The tension isolation assembly, the tension swing roller assembly and the tension detection roller are arranged sequentially along the direction close to the lower calendering roller (52) and the upper calendering roller (53).

8. The folding-back double-sided dry electrode production equipment according to claim 1, characterized in that, It also includes a second traction mechanism (70) disposed between the second rolling mechanism (30) and the calendering mechanism (50); both the first traction mechanism (60) and the second traction mechanism (70) include a traction frame (61), a traction steel roller (62), a traction steel roller drive assembly, a traction rubber roller (63) located above and opposite to the traction steel roller (62), two traction connecting shafts arranged in a front-to-back orientation, two traction swing arms (64) arranged in a front-to-back orientation, and two traction cylinders (65). The two ends of the traction steel roller (62) are rotatably disposed on the traction frame (61), the traction rubber roller (63) is rotatably disposed between the first ends of the two traction swing arms (64), the first ends of the two traction connecting shafts are respectively disposed on the traction frame (61), and the two traction swing arms (64) are respectively disposed between the first ends of the two traction connecting shafts. Two traction cylinders (65) are rotatably mounted on the outer periphery of the second end of the two traction connecting shafts. The two traction cylinders (65) are respectively mounted on the traction frame (61) and located to the right of the two traction swing arms (64). The two traction cylinders (65) are respectively perpendicular to the two traction swing arms (64). The output ends of the two traction cylinders (65) are respectively connected to the two traction swing arms (64). The two traction cylinders (65) are respectively used to drive the two traction swing arms (64) to rotate left and right around the axis of the corresponding traction connecting shaft, thereby driving the traction rubber roller (63) to move away from or closer to the traction steel roller (62). The traction steel roller drive assembly is mounted on the traction frame (61). One end of the traction steel roller (62) is connected to the traction steel roller drive assembly. The traction steel roller drive assembly is used to drive the traction steel roller (62) to rotate.

9. The folding-back double-sided dry electrode production equipment according to claim 8, characterized in that, The first traction mechanism (60) further includes a traction roller (66), which is located above the traction steel roller (62) and traction rubber roller (63) of the first traction mechanism (60). The two ends of the traction roller (66) are rotatably mounted on the traction frame (61) of the first traction mechanism (60). The unwinding mechanism (20) includes an unwinding frame (21), an unwinding shaft, an unwinding motor, and an unwinding roller (22). The two ends of the unwinding shaft are rotatably mounted on the unwinding frame (21). The unwinding motor is mounted on the unwinding frame (21). One end of the unwinding shaft is connected to the output end of the unwinding motor. The unwinding motor is used to drive the unwinding shaft to rotate. The unwinding roller (22) is located below the unwinding shaft. The two ends of the unwinding roller (22) are rotatably mounted on the unwinding frame (21).

10. The folding-back double-sided dry electrode production equipment according to claim 8, characterized in that, It also includes a first surface density thickness measuring machine (80), a second surface density thickness measuring machine (90), and a third surface density thickness measuring machine (100). The first surface density thickness measuring machine (80) is disposed between the unwinding mechanism (20) and the second rolling mechanism (30), or disposed between the first traction mechanism (60) and the second rolling mechanism (30) and located within the support platform. The second surface density thickness measuring machine (90) is disposed between the second rolling mechanism (30) and the second traction mechanism (70). The third surface density thickness measuring machine (100) is disposed between the calendering mechanism (50) and the winding mechanism (40).

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