Electrode compounding device

Abstract

The invention discloses an electrode compounding device which comprises a thinning compounding mechanism and a discharging and winding mechanism adjacent to the thinning compounding mechanism. The thinning composite mechanism comprises a first frame, a thinning roller set connected with the first frame and a composite roller set connected with the first frame. The thinning roller group and the composite roller group are integrated on the first frame, so that at least one frame can be reduced, the occupied area of the dry-method battery manufacturing equipment is reduced, and the manufacturing cost of the equipment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of dry electrode film-forming equipment, and in particular to an electrode composite device. Background Art

[0002] The dry electrode manufacturing process is an electrode preparation technology that does not require the use of solvents. Compared with the traditional wet electrode process, it has the advantages of high cost-effectiveness, environmental friendliness, and improved energy density.

[0003] In the above process, each functional device must be supported by a corresponding number of support frames, resulting in a large footprint of the dry-process battery manufacturing equipment. In addition, a corresponding number of support frames must be set up, and the manufacturing cost of the equipment is also high. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an electrode composite device with small footprint and high integration.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] An electrode composite device comprises a thinning composite mechanism and a material unwinding and winding mechanism arranged adjacent to the thinning composite mechanism;

[0007] The thinning and compounding mechanism comprises a first frame, a thinning roller group detachably connected to the first frame, and a compounding roller group detachably connected to the first frame;

[0008] The thinning roller group is used to thin the dry electrode film;

[0009] The composite roller group is used to composite the thinned dry electrode film with the current collector to form a single-sided electrode film, and to composite the thinned dry electrode film with the single-sided electrode film to form a double-sided electrode film.

[0010] The beneficial effects of the present invention are:

[0011] By integrating the thinning roller group and the composite roller group into the first frame, at least one frame can be reduced, the floor space of the dry-process battery manufacturing equipment can be reduced, and the manufacturing cost of the equipment can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 is a tape diagram of the electrode composite device in this embodiment;

[0014] Figure 2 is a front view of the thinned composite mechanism (housing omitted);

[0015] Figure 3 It is one of the three-dimensional diagrams of the thinned composite mechanism (housing omitted);

[0016] Figure 4 It is one of the cross-sectional views of the thinned composite mechanism;

[0017] Figure 5 It is the second cross-sectional view of the thinned composite mechanism;

[0018] Figure 6 yes Figure 3 A magnified view of the structure of the middle A part;

[0019] Figure 7 It is a three-dimensional structural diagram of the thinning composite roller and the thinning composite roller seat;

[0020] Figure 8 It is a three-dimensional structural diagram of the thinning composite roller, the thinning composite roller seat and the visual detection mechanism;

[0021] Fig. 9 It is the second stereogram of the thinning composite mechanism;

[0022] Fig.10 yes Figure 4 A magnified view of the structure of the middle B section;

[0023] Fig.11 It is one of the three-dimensional diagrams of the unwinding and rewinding mechanism;

[0024] Fig.12 This is the second stereoscopic diagram of the unwinding and rewinding mechanism (the outer shell is omitted);

[0025] Fig.13 It is one of the three-dimensional images of the reeling and unreeling group;

[0026] Fig.14 This is the second three-dimensional diagram of the reel-reeling and rewinding group. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0028] Reference Figure 1, this embodiment provides an electrode composite device, including a thinning composite mechanism 100 and a material unwinding and winding mechanism 200 disposed adjacent to the thinning composite mechanism 100;

[0029] Reference Figure 1 to Figure 2 The thinning and compounding mechanism 100 includes a first frame 10, a thinning roller group 1, and a compounding roller group 2 detachably connected to the first frame 10; the thinning roller group 1 is used to thin the dry electrode film; the compounding roller group 2 is used to compound the thinned dry electrode film with the collector to form a single-sided electrode membrane sheet, and to compound the thinned dry electrode film with the single-sided electrode membrane sheet to form a double-sided electrode membrane sheet.

[0030] The thinning roller group 1 and the composite roller group 2 are both detachably connected to the first frame 10, which is convenient for taking out the thinning roller group 1 and the composite roller group 2, and performing maintenance and cleaning on the thinning roller group 1 and the composite roller group 2; compared with the prior art, in which the thinning roller group 1 and the composite roller group 2 are separately supported by two frames, this embodiment can reduce the setting of one frame, reduce the floor space of the dry-process battery manufacturing equipment, and reduce the manufacturing cost of the equipment.

[0031] Reference Figures 2 to 5 In one embodiment, the thinning roller group 1 includes a transfer roller 11, a second thinning roller 12 and a first composite roller seat 13; the transfer roller 11 and the second thinning roller 12 are both rotatably mounted on the first composite roller seat 13; the composite roller group 2 includes a thinning composite roller seat 21 and a thinning composite roller 22 rotatably mounted on the thinning composite roller seat 21, a second composite roller seat 24 and a second composite roller 23 rotatably mounted on the second composite roller seat 24; the transfer roller 11, the second thinning roller 12, the thinning composite roller 22 and the second composite roller 23 are all on the same horizontal plane and are arranged adjacent to each other in sequence; the second thinning roller 12 and the thinning composite roller 22 jointly thin the electrode film; the thinning composite roller 22 and the second composite roller 23 jointly composite the dry electrode film with the single-sided electrode film sheet / double-sided electrode film sheet;

[0032] The first frame 10 is provided with a first slide rail 41, a second slide rail 42 and a third slide rail 45; a first pulley 43 corresponding to the first slide rail 41 is provided at the bottom of the thinning composite roller seat 21, a second pulley 44 corresponding to the second slide rail 42 is provided at the bottom of the second composite roller seat 24, and a third pulley 46 corresponding to the third slide rail 45 is provided at the bottom of the first composite roller seat 13; the first composite roller seat 13, the thinning composite roller seat 21 and the second composite roller seat 24 are all detachably connected to the first frame 10.

[0033] After the equipment has been in operation for a long time, the roller surface will inevitably be damaged or the roller surface needs to be inspected regularly. When the equipment is used to manufacture large electrodes for new energy vehicles, the corresponding volume of the manufacturing equipment will also be very large. The sliding friction between the first composite roller seat 13, the thinned composite roller seat 21 and the second composite roller seat 24 relative to the first frame 10 is also very large, making it impossible for the operator to take them out directly. However, through the cooperation of the pulley and the slide rail, the friction can be reduced to assist the operator in pulling out each roller.

[0034] More specifically, the first composite roller seat 13, the thinning composite roller seat 21 and the second composite roller seat 24 are all square frames, the first slide rails 41 are arranged on both sides of the bottom of the thinning composite roller seat 21, the second slide rails 42 are arranged on both sides of the bottom of the second composite roller seat 24, and the third slide rails 45 are arranged on both sides of the bottom of the first composite roller seat 13; the first slide rails 41 are two groups, the second slide rails 42 are two groups, and the third pulleys 46 are two groups;

[0035] Reference Figure 4 The size relationship between the first slide rail 41 and the first pulley 43, the size relationship between the second slide rail 42 and the second pulley 44, and the size relationship between the third slide rail 45 and the third pulley 46 are the same. Take the roller diameter size relationship between the first slide rail 41 and the first pulley 43 as an example: a slide groove is provided on the first slide rail 41, and the first pulley 43 slides in the slide groove. The width of the slide groove is greater than the width of the first pulley 43. When the roller gap of each roller is to be adjusted, it can be avoided that the pulley and the slide groove are stuck to each other and hinder the roller gap adjustment.

[0036] In one embodiment, a casing 101 is provided on the first composite roller seat 13. Dust may be generated during the thinning and composite process of the dry electrode film. The casing 101 can prevent the dust from flying into other equipment in the workshop. In order to facilitate observation of the working conditions, a transparent working window (not shown in the figure) can be provided on the casing 101, or the casing 101 can be provided as a fully transparent structure. When the equipment fails to work, the internal conditions can be observed without disassembling the casing 101.

[0037] Reference Figures 4 to 5 Specifically, a first pressure cylinder 411 is provided on the first composite roller seat 13, and a second pressure cylinder 412 is provided on the second composite roller seat 24. The output ends of the first pressure cylinder 411 and the second pressure cylinder 412 are arranged opposite to each other. The first pressure cylinder 411 is used to pressurize the transfer roller 11, and the second pressure cylinder 412 is used to pressurize the second composite roller. The first pressure cylinder 411 and the second pressure cylinder 412 can be used to synchronize the size of the roller gap between each roller, control the thinning thickness of the dry electrode film, and strengthen the tightness of the thinned dry electrode film with the collector or the single-sided electrode film.

[0038] Although the pulley can assist in removing the thinning roller set 1 and the composite roller set 2, it also increases the risk of the first composite roller seat 13, the thinning composite roller seat 21 and the second composite roller seat 24 sliding off the first frame 10 and the risk of displacement during operation of the equipment.

[0039] Reference Figures 5 and 6 In order to further solve the above problems, the present embodiment provides a better solution: the first frame 10 is provided with a limiting structure for limiting the movement of the first composite roller seat 13, the thinning composite roller seat 21 and the second composite roller seat 24 relative to the first frame 10, so as to prevent the first composite roller seat 13, the thinning composite roller seat 21 and the second composite roller seat 24 from falling due to the vibration resonance generated by the material transmission of the equipment during the operation of the equipment.

[0040] Specifically, the limiting structure includes a first limiting block 51, a second limiting block 52 and a third limiting block 53 which are detachably arranged on the first frame 10;

[0041] The first limit blocks 51 are arranged on both sides of the first frame 10 along the axial direction of the thinning composite roller 22, and are used to fix the position of the thinning composite roller seat 21 on the first frame 10;

[0042] The second limit blocks 52 are arranged on both sides of the first frame 10 along the axial direction of the second composite roller 23, and are used to fix the position of the second composite roller seat 24 on the first frame 10;

[0043] The third limit blocks 53 are arranged on both sides of the first frame 10 along the axial direction of the transfer roller 11, and are used to fix the position of the first composite roller seat 13 on the first frame 10;

[0044] Specifically, the first limit block 51 and the second limit block 52 have the same structure. Taking the first limit block 51 as an example, one end of the first limit block 51 is fixed to the first frame 10 by screws, and the other end is against the thinning composite roller seat 21.

[0045] Reference Figures 4 to 5 More specifically, the roller diameter size relationship among the transfer roller 11, the second thinning roller 12, the thinning composite roller 22 and the second composite roller 23 is: the second thinning roller 12<transfer roller 11<thinning composite roller 22=second composite roller 23.

[0046] In the process of electrode film compounding, heating oil circuits are arranged in the second thinning roller 12, the thinning composite roller 22 and the second composite roller 23. When the second thinning roller 12 and the thinning composite roller 22 are rolling and thinning the dry electrode film, the temperature of the second thinning roller 12 and the thinning composite roller 22 will change, so that the thermal expansion value of the second thinning roller 12 and the thinning composite roller 22 in the axial direction is different, resulting in a change in the gap between the second thinning roller 12 and the thinning composite roller 22, resulting in uneven thickness and poor precision of the thinned film. If the above relationship is satisfied between the rollers, this problem can be solved.

[0047] Specifically, the roller diameter of the second thinning roller 12 is smaller than the roller diameter of the thinning composite roller 22. During the thinning process, different linear speeds are generated on both sides of the dry electrode film. The speed at which the dry electrode film moves on the second thinning roller 12 is greater than the speed at which the dry electrode film moves on the thinning composite roller 22, which helps to variable-speed thinning of the dry electrode film and can further apply shear force to the dry electrode film to promote its fibrillation.

[0048] When producing wide electrodes by the above-mentioned device, the second thinning roller 12 is easily deformed, resulting in uneven thickness of the dry electrode film after secondary thinning and calendering; at the same time, when the second thinning roller 12 and the thinning composite roller 22 are calendering, the temperature of the second thinning roller 12 will change, making the second thinning roller 12 easy to expand and deform, resulting in uneven thickness of the thinned dry electrode film. Therefore, the transfer roller 11 that fits the second thinning roller 12 is provided to avoid the deformation of the second thinning roller 12 and reduce the occurrence of uneven thickness of the dry electrode film; specifically, the roller axis of the transfer roller 11 is longer than or equal to the roller axis of the second thinning roller 12, and the roller diameter of the transfer roller 11 is larger than the roller diameter of the second thinning roller 12;

[0049] Among them, the roller diameter of the thinning composite roller 22 is equal to the roller diameter of the second composite roller 23, which can ensure that the thinning composite roller 22 and the second composite roller 23 rotate at the same speed, so that during the composite process, the thinned dry electrode film and the current collector are subjected to uniform and consistent pressure, thereby improving the composite accuracy. In addition, the thinning composite roller 22 has both thinning and composite functions. After the thinning roller group 1 thins the dry electrode film, the thinned dry electrode film adheres to the roller wall of the thinning composite roller 22 and enters the composite roller group 2, which can minimize the tension change of the dry electrode film from thinning to the composite link.

[0050] Reference Figure 4 , Figure 5In order to reduce the adhesion of electrode film materials on each roller, affect the heating of the dry electrode film by the rollers and affect the flatness of the surfaces of each roller, the first frame 10 is provided with a first roller scraper 15, a second roller scraper 16, a third roller scraper 102 and a fourth roller scraper 103. The first roller scraper 15 is arranged on one side of the thinning composite roller 22 to scrape off the electrode film material on the thinning composite roller 22; the second roller scraper 16 is arranged on one side of the second composite roller 23 to scrape off the electrode film material on the second composite roller 23; the third roller scraper 102 is arranged on one side of the transfer roller 11 to scrape off the electrode film material on the surface of the transfer roller 11; the fourth roller scraper 103 is arranged on one side of the second thinning roller 12 to scrape off the electrode film material on the surface of the second thinning roller 12.

[0051] Reference Figure 4 Specifically, the first frame 10 is further provided with a rough cutting knife group 61 and a fine cutting knife group 62. The rough cutting knife group 61 is arranged on the side of the thinning roller group 1 away from the composite roller group 2. The rough cutting knife group 61 is used to cut the dry electrode film fed into the thinning composite mechanism 100; to prevent the dry electrode film from being thinned by rolling and pressing, and the width of the film material increases, causing the wide side of the film material to exceed the roller surface of the thinning roller group 1, and the side of the film to form irregular edges; since the dry electrode film lacks attachment support, the irregular edges of the dry electrode film in the process of entering the thinning roller group 1 may cause curling and wavy edges, thereby increasing the risk of disconnection and cracking of the dry electrode film. After the rough cutting knife group 61 cuts the dry electrode film, a regular edge is formed, which can avoid cracking of the dry electrode film;

[0052] The fine cutter group 62 is arranged at the bottom of the thinning composite roller 22 to cut the dry electrode film thinned by the thinning roller group 1 to avoid uneven edges of the formed electrode membrane and large differences in electric field strength on the electrode membrane, which may cause short circuits in the electrode membrane, thereby ensuring production quality.

[0053] Reference Figures 7 and 8 , more specifically, the fine cutting knife group 62 includes a hand wheel 621, a screw rod 622, an upper slide rail 623, a lower slide rail 624, a left screw rod nut 625, a right screw rod nut 626, a left sliding seat 627, a right sliding seat 628, a left circular knife 629, a right circular knife 630, a left material receiving inclined plate 631, a right material receiving inclined plate 632, a left knife driving member 633 and a right knife driving member 634; the upper slide rail 623 is located above the screw rod 622 and is arranged parallel to the screw rod 622; the lower slide rail 624 is located below the screw rod 622 and is arranged parallel to the screw rod 622; the hand wheel 621 is fixedly connected to one end of the screw rod 622; left threads and right threads are respectively distributed on both sides of the screw rod 622, that is, half of the screw rod 622 is a left thread and half of the screw rod 622 is a right thread; the left screw rod nut 625 is transmission connected to the left thread, and the right screw rod nut 626 is transmission connected to the right thread;

[0054] The left sliding seat 627 is fixed on the left screw nut 625, and is slidably disposed on the upper slide rail 623 and the lower slide rail 624; the right sliding seat 628 is fixed on the right screw nut 626, and is slidably disposed on the upper slide rail 623 and the lower slide rail 624; one end of the left material receiving inclined plate 631 is fixed on the left sliding seat 627, and is disposed on the side of the left circular knife 629 facing away from the right circular knife 630, and is located above the center of the left circular knife 629, and the left material receiving inclined plate 631 is inclined toward the bottom of the electrode composite device;

[0055] One end of the right material receiving inclined plate 632 is fixed on the right sliding seat 628, and is arranged on the side surface of the right circular knife 630 facing away from the left circular knife 629 and above the center of the right circular knife 630. The left material receiving inclined plate 631 is arranged with its inclination direction toward the bottom of the electrode composite device.

[0056] The fixed end of the left knife driving member 633 is arranged on the left sliding seat 627, and the driving member of the left knife driving member 633 is connected to the output end of the left circular knife 629; the fixed end of the right knife driving member 634 is arranged on the right sliding seat 628, and the driving member of the right knife driving member 634 is connected to the output end of the right circular knife 630.

[0057] Taking cutting of a single-sided electrode membrane as an example, the working principle of the fine cutter group 62 is as follows:

[0058] Turn the hand wheel 621 to drive the screw 622 to rotate in the same direction, and the left screw nut 625 and the right screw nut 626 slide in opposite directions synchronously, so that the relative distance between the left circular knife 629 and the right circular knife 630 becomes farther; when the left circular knife 629 and the right circular knife 630 are adjusted to the appropriate position, the left knife driving member 633 and the right knife driving member 634 are started, and the left circular knife 629 and the right circular knife 630 cut the single-sided electrode membrane, and the cut left membrane waste edge and right membrane waste edge slide to the bottom of the electrode composite device along the left material connecting inclined plate 631 and the right material connecting inclined plate 632 respectively under the action of gravity, completing the fine cutting of the dry electrode membrane.

[0059] In order to check the uniformity of cutting by the fine cutting knife group 62, a visual inspection mechanism 413 is fixed on the left sliding seat 627 and / or the right sliding seat 628. The visual inspection mechanism 413 moves with the left sliding seat 627 and / or the right sliding seat 628. The visual inspection mechanism 413 is used to detect whether the dry electrode film is offset before entering the composite roller group 2 and whether the cutting edge is neat.

[0060] Reference Figure 5 More specifically, a guide plate 14 is provided at the bottom of the thinning composite roller 22. Since the dry electrode membrane is formed by rolling and pressing the dry material, when the thinning roller group 1 thins the dry electrode membrane, part of the dry material dust falls, and the guide plate 14 is used to guide the dust to fall to the bottom of the electrode composite device.

[0061] Reference Fig. 9 More specifically, a chamber 111 is provided in the housing 101, and the chamber 111 is provided at the bottom of the thinning roller group 1 and the composite roller group 2. The left material receiving inclined plate 631, the right material receiving inclined plate 632, and the guide plate 14 are all inclined toward the chamber 111. In order to prevent dust from being adsorbed onto the collector, the single-sided electrode membrane or the double-sided electrode membrane, the housing 101 is also provided with a dust removal mechanism (not shown in the figure), and the dust suction port of the dust removal mechanism is connected to the chamber 111, and the dust removal mechanism is used to remove dust in the chamber 111.

[0062] Reference Figure 5 , Fig. 9 More specifically, the first roller scraper 15 and the second roller scraper 16 will also scrape off dust during operation. In order to enable the dust removal mechanism to accurately absorb dust, a first dust removal pipe 17 and a second dust removal pipe 18 are provided. One end of the first dust removal pipe 17 is connected to the chamber 111 or the dust removal mechanism, and the other end is provided at one side of the first roller scraper 15. The dust scraped off by the first roller scraper 15 is sucked away by the dust removal mechanism via the first dust removal pipe 17; one end of the second dust removal pipe 18 is connected to the chamber 111 or the dust removal mechanism, and the other end is provided at one side of the second roller scraper 16. The dust scraped off by the second roller scraper 16 is sucked away by the dust removal mechanism via the first dust removal pipe 17.

[0063] More specifically, a film outlet conveyor path is provided on the top of the first frame 10, and the single-sided electrode membrane or the double-sided electrode membrane flowing out of the composite roller group 2 flows out of the thinning composite mechanism 100 along the film outlet conveyor path, and the second roller scraper 16 is arranged at the bottom of the film outlet conveyor path, and one end of the second dust removal pipe 18 is arranged between the second roller scraper 16 and the film outlet conveyor path to more accurately absorb dust.

[0064] Reference Figure 4 , Fig.10 More specifically, a tension roller group 71 is further provided on the first frame 10, and the tension roller group 71 is used to adjust the tension of the dry electrode film entering the thinning composite mechanism 100, so as to avoid insufficient tension of the dry electrode film, which may cause wrinkles to form on the dry electrode film during the thinning process, thereby affecting the thinning process; the tension roller group 71 includes a swing motor (not shown in the figure), a left swing roller 712, a right swing roller 713, a first material-pulling roller 714, and a second material-pulling roller 715;

[0065] The fixed end of the swing motor is arranged on the first frame 10; the left swing roller 712 is fixedly connected to the output end of the swing motor and is arranged on the side of the output end of the swing motor close to the rough cutting knife group 61; the right swing roller 713 is fixedly connected to the output end of the swing motor and is arranged on the side of the output end of the swing motor close to the thinning roller group 1; the horizontal positions of the swing motor, the left swing roller 712 and the right swing roller 713 are all lower than the horizontal position of the rough cutting knife group 61;

[0066] The swing motor can drive the left swing roller 712 and the right swing roller 713 to swing with the output end of the swing motor as the rotation center; the first material-pulling roller 714 is located above the left swing roller 712 and is arranged between the left swing roller 712 and the output end of the swing motor; the second material-pulling roller 715 is located above the right swing roller 713 and is arranged between the right swing roller 713 and the output end of the swing motor;

[0067] The dry electrode membrane rolls in contact with the first stripping roller 714, the left swing roller 712, the right swing roller 713 and the second stripping roller 715 in sequence; wherein the dry electrode membrane alternately moves between the first stripping roller 714 and the left swing roller 712, the dry electrode membrane moves on the same side of the left swing roller 712 and the right swing roller 713, and the dry electrode membrane alternately moves between the right swing roller 713 and the second stripping roller 715.

[0068] Reference Figure 5 More specifically, a tension sensor 414 is provided above the tension roller group 71, and the tension sensor 414 is used to detect the tension of the dry electrode film stretched by the tension roller group 71; the operator can adjust the tension of the dry electrode film by the tension roller group 71 according to the value fed back by the tension sensor 414, or realize this function by setting a program. Figure 5 More specifically, a deviation correction group 415 is provided at the bottom of the composite roller group 2 , and the deviation correction group 415 is used to correct the current collector or single-sided electrode membrane that is about to enter the composite roller group 2 .

[0069] Reference Figure 1 , Figures 11 to 14 In one embodiment, the unwinding and rewinding mechanism 200 further includes a first unwinding and rewinding roller 33, a second unwinding and rewinding roller 34, a second frame 40, a thickness detection group 81, a second tension group 82 and a belt pressing group 83; the first unwinding and rewinding roller 33 is used to collect a single-sided electrode membrane or a double-sided electrode membrane; the second unwinding and rewinding roller 34 is used to release a single-sided electrode membrane or a current collector into the thinning composite mechanism 100; the second frame 40 is provided with a belt taking-up path 401 and a belt unwinding path 402 located below the belt taking-up path 401; the thickness detection group 81 is provided on the belt taking-up path 401; the second tension group 82 is provided on the belt taking-up path 401; the thickness detection group 81 is provided on the belt taking-up path 401; the second tension group 82 is provided on the belt pressing group 83; the first unwinding and rewinding roller 33 is used to collect a single-sided electrode membrane or a double-sided electrode membrane; the second unwinding and rewinding roller 34 is provided to release a single-sided electrode membrane or a current collector into the thinning composite mechanism 100; the second frame 40 is provided with a belt taking-up path 401 and a belt unwinding path 402 located below the belt taking-up path 401; the thickness detection group 81 is provided on the belt taking-up path 401; the second tension group 82 is provided on the belt pressing group 83; the first unwinding and rewinding roller 33 is provided on the belt taking-up path 401; the second tension group 82 is provided on the belt pressing group 83; the second tension group 82 is provided on the belt pressing group 83; the first tension group 82 is provided on the belt taking-up path 401; the second tension group On the belt path 401, it is used to detect the thickness of the single-sided electrode membrane and the double-sided electrode membrane; the second tension group 82 and the belt pressing group 83 are arranged on the belt release path 402, and the horizontal position of the belt pressing group 83 is lower than the horizontal position of the first take-up roller 33 and the second take-up roller 34. The belt pressing group 83 is used to press down the collector and the single-sided electrode membrane released by the first take-up roller 33 to maintain the stability of the collector and the single-sided electrode membrane during the belt walking process; the second tension group 82 is used to adjust the tension of the collector and the single-sided electrode membrane pressed down by the belt pressing group 83.

[0070] Specifically, an alignment detection device 84 is also provided on the belt collection path 401. The alignment detection device 84 is used to detect whether the dry electrode film is aligned with the current collector. If it is not aligned correctly, it may cause the motor resistance to be large and a short circuit to occur. The alignment detection device 84 replaces manual monitoring, further reducing labor costs and improving the intelligence of the equipment.

[0071] Specifically, the alignment detection device 84 is a CCD camera disposed on both sides of the upper and lower sides of the tape collection path 401 .

[0072] Reference Fig.12 , Fig.13 as well as Fig.14 In one embodiment, the unwinding and rewinding group of the unwinding and rewinding mechanism 200 further includes a left turntable shaft 211, a right turntable shaft 212, a left first passive wheel 213, a left second passive wheel 214, a right first passive wheel 215, a right second passive wheel 216, a first unwinding and rewinding roller driving member 217, a second unwinding and rewinding roller driving member 218, a first unwinding and rewinding roller gear 219, a second unwinding and rewinding roller gear 220, a left first transmission chain (not shown in the figure), a left second transmission chain (not shown in the figure), a left driving wheel 223, a right driving wheel 224, a right first transmission chain (not shown in the figure) and a right second transmission chain (not shown in the figure);

[0073] The left turntable shaft 211 is arranged on the center of the left turntable 31 and is located on the side facing away from the right turntable 32; the right turntable shaft 212 is arranged on the center of the right turntable 32 and is located on the side facing away from the left turntable 31; the left first passive wheel 213 and the left second passive wheel 214 are rotatably mounted on the left turntable shaft 211, and the relative positions of the left first passive wheel 213 and the left second passive wheel 214 are fixed; the right first passive wheel 215 and the right second passive wheel 216 are rotatably mounted on the right turntable shaft 212, and the relative positions of the right first passive wheel 215 and the right second passive wheel 216 are fixed;

[0074] The first retractable roller gear 219 is connected to one end of the first retractable roller 33, and the first retractable roller gear 219, the left first passive wheel 213, and the left second passive wheel 214 are all located on the side of the same surface of the left turntable 31; the left first transmission chain is meshed with the first retractable roller gear 219 and the left first passive wheel 213; the first retractable roller driving member 217 is arranged on the left bracket 20, and the first retractable roller driving member 217 is provided with a left driving wheel 223, and the left second transmission chain is meshed with the left driving wheel 223 and the left second passive wheel 214;

[0075] The second retracting roller gear 220 is connected to one end of the second retracting roller 34, and the second retracting roller gear 220, the right first passive wheel 215, and the right second passive wheel 216 are all located on the side of the same surface of the right turntable 32; the right first transmission chain is meshed with the second retracting roller gear 220 and the right first passive wheel 215; the second retracting roller driving member 218 is arranged on the right bracket 30, and the second retracting roller driving member 218 is provided with a right active wheel 224, and the right second transmission chain is meshed with the right active wheel 224 and the right second passive wheel 216.

[0076] The working principle of the unwinding and rewinding mechanism 200 in this embodiment is as follows:

[0077] The first retractable roller 33 is located at the retracting position, and the second retractable roller 34 is located at the unreeling position;

[0078] The first retractable roller driving member 217 drives the left active wheel 223 to rotate, and through the transmission of the left second transmission chain, drives the left second passive wheel 214 to rotate, and the left second passive wheel 214 drives the left first passive wheel 213 to rotate synchronously. Under the drive of the left first transmission chain, the first retractable roller gear 219 rotates, driving the first retractable roller 33 to rotate about its axis, thereby realizing rewinding;

[0079] The second retractable roller driving member 218 drives the right active wheel 224 to rotate, and through the transmission of the right second transmission chain, drives the right second passive wheel 216 to rotate, and the right second passive wheel 216 drives the right first passive wheel 215 to rotate synchronously. Under the drive of the right first transmission chain, the second retractable roller gear 220 rotates, driving the second retractable roller 34 to rotate about its axis, thereby realizing unwinding;

[0080] In this embodiment, a control circuit board and a winding thickness sensor may be provided on the right turntable 32 or the left turntable 31, and the arrangement of the electronic device requires reasonable planning of the lines to avoid the disorderly arrangement of the wires on the device and the influence on the normal operation of the winding and unwinding structure 200; taking the driving of the first winding and unwinding roller 33 as an example, if the left driving wheel 223 is used to directly drive the first winding and unwinding roller gear 219 for transmission, the left driving wheel 223 and the first winding and unwinding roller gear 219 need to be located on the same plane, and as the left turntable 31 rotates, the wires on its inner surface are easily entangled with the left driving wheel 223, which not only affects the rotation of the left turntable 31, but also causes the left driving wheel 223 to be unable to mesh with the first winding and unwinding roller gear 219, and in this embodiment, since the left first passive wheel 213 and the left second passive wheel 214 are both located on the left turntable shaft 211, the left driving wheel 223 and the first winding and unwinding roller gear 219 are located on two planes, which can avoid the wires on the inner surface of the left turntable 31 from being entangled with the left driving wheel 223.

[0081] Specifically, a left turntable driving member 225 is provided on the left bracket 20 , and an output end of the left turntable driving member 225 is engaged with the left turntable 31 for driving the left turntable 31 to rotate.

[0082] More specifically, a plurality of teeth are provided on the circumference of the left turntable 31 , and the output end of the left turntable driving member 225 is connected to a driving gear 226 meshing with the teeth. The left turntable driving member 225 drives the driving gear 226 to rotate, thereby driving the left turntable 31 to rotate.

[0083] The left turntable driving member 225 drives the left turntable 31 and the right turntable 32 to rotate coaxially, and does not interfere with the transmission drive structure of the first retractable roller 33 and the transmission drive structure of the second retractable roller 34, so it is easy to maintain and install.

[0084] Reference Fig.11 In one embodiment, the unwinding and rewinding mechanism 200 also includes a shell 201, which encloses a left turntable shaft 211, a right turntable shaft 212, a left first passive wheel 213, a left second passive wheel 214, a right first passive wheel 215, a right second passive wheel 216, a first rewinding roller driving member 217, a second rewinding roller driving member 218, a first rewinding roller gear 219, a second rewinding roller gear 220, a left first transmission chain, a left second transmission chain, a left active wheel 223, a right active wheel 224, a right first transmission chain and a right second transmission chain to prevent the operator from accidentally touching the rewinding roller; and in order to facilitate rewinding, the first rewinding roller 33 and the second rewinding roller 34 are exposed outside the shell 201.

[0085] Reference Figure 1 , Fig.12 Furthermore, in the housing 201, along the transmission direction of the single-sided electrode membrane or the double-sided electrode membrane, a second tension group 203, a second deflection correction group 204, and a second belt pressing group 205 are sequentially arranged; the second tension group 203 is used to tension the single-sided electrode membrane or the double-sided electrode membrane detected by the thickness detection group 81; the second deflection correction group 204 is used to correct the single-sided electrode membrane or the double-sided electrode membrane to ensure that the single-sided electrode membrane or the double-sided electrode membrane remains flat when winding; the second belt pressing group 205 includes a bottom plate 2051 and two pressing pieces 2052 arranged on the top of the bottom plate 2051. There is a gap between the pressing piece 2052 and the bottom plate 2051. The single-sided electrode membrane or the double-sided electrode membrane runs in the gap. A second operation window 202 is provided on the housing 201 and located at the position of the second pressing group 205. Through the second operation window 202, the operator can observe the running of the single-sided electrode membrane or the double-sided electrode membrane between the two pressing pieces 2052.

[0086] More specifically, the side of the second pressing belt set 205 facing the bottom plate 2051 is a circular arc surface to prevent scratching of the single-sided electrode membrane or the double-sided electrode membrane;

[0087] More specifically, the second working window 202 is tilted upward for easy observation.

[0088] More specifically, the housing 201 also includes a roll diameter detection structure 206, which is used to detect the roll diameter of the electrode membrane collected on the first retractable roller 33 and the second retractable roller 34, to ensure that the roll diameter of the collected single-sided electrode membrane or double-sided electrode membrane meets the quality requirements, and the film amount of the current collector or single-sided electrode membrane during the unwinding process can be estimated through the numerical value fed back by the roll diameter detection structure 206, so as to facilitate the operator to replenish in time;

[0089] More specifically, the roll diameter detection structure 206 is an ultrasonic roll diameter detector.

[0090] The working principle and tape-feeding process of the thinning composite mechanism in this embodiment are as follows:

[0091] Dry electrode film conveying process: the dry electrode film enters from the left side of the first frame 10, is first cut by the rough cutting knife group 61, enters the tension roller group 71 to adjust the tension, and then moves to the top of the first frame 10, and then enters the thinning roller group 1 downward. The dust generated during the thinning process falls into the guide sheet 14. At the same time, the dry electrode film is thinned, and the thinned dry electrode film is bonded to the thinning composite roller 22 for rotation. At the same time, the fine cutting knife group 62 cuts the dry electrode film on the thinning composite roller 22, and the cut dry electrode film continues to be bonded to the thinning composite roller 22 for rotation, and is transferred to the composite roller group 2 to be composited with the current collector or the single-sided electrode film.

[0092] The current collector or single-sided electrode membrane tape running process: Taking the current collector as an example, the current collector enters from the lower right side of the first frame 10. A deviation correction group 415 is provided below the first frame 10. After deviation correction, the current collector is aligned with the dry electrode membrane. The current collector is tape-running upward and enters the composite roller group 2 to be composited with the dry electrode membrane to form a single-sided electrode membrane or a double-sided electrode membrane.

[0093] The conveying process of the single-sided electrode membrane or the double-sided electrode membrane: Taking the single-sided electrode membrane as an example, after the single-sided electrode membrane flows out from the composite roller group 2, it enters the unwinding and winding mechanism 200.

[0094] The working principle of the unwinding and rewinding mechanism and the tape-feeding process in this embodiment are as follows:

[0095] Single-sided compounding: when the first retractable roller 33 is in the unwinding position and the second retractable roller 34 is in the rewinding position, the first retractable roller 33 provides the current collector sheet to the composite roller group 2, and after being laminated with the thinned dry electrode film and the current collector sheet, they enter the composite roller group 2 together, and after being compacted, form a single-sided electrode film sheet, and enter the second retractable roller 34 in a material-free state, and the second retractable roller 34 rewinds the single-sided electrode film sheet;

[0096] Double-sided composite: Subsequently, the left turntable 31 and the right turntable 32 rotate synchronously until the second reel 34 is located at the unwinding position and the first reel 33 is located at the rewinding position; subsequently, the second reel 34 provides the single-sided electrode membrane to the composite roller group 2, and after being laminated with the thinned dry electrode membrane and the single-sided electrode membrane, they enter the composite roller group 2 together, and after being compacted, a double-sided electrode membrane is formed, and then enters the first reel 33 in a material-free state, and the first reel 33 completes the rewinding of the double-sided electrode membrane.

[0097] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An electrode composite device, characterized in that: It comprises a thinning and compounding mechanism (100) and a material unwinding and rewinding mechanism (200) arranged adjacent to the thinning and compounding mechanism (100); The thinning and compounding mechanism (100) comprises a first frame (10), a thinning roller group (1) detachably connected to the first frame (10), and a compounding roller group (2) detachably connected to the first frame (10); The thinning roller group (1) is used to thin the dry electrode film; The composite roller group (2) is used to composite the thinned dry electrode film with the current collector to form a single-sided electrode film, and to composite the thinned dry electrode film with the single-sided electrode film to form a double-sided electrode film.

2. The electrode composite device according to claim 1, characterized in that: The thinning roller group (1) comprises a transfer roller (11), a second thinning roller (12) and a first composite roller seat (13); the transfer roller (11) and the second thinning roller (12) are both rotatably mounted on the first composite roller seat (13); The composite roller group (2) comprises a thinning composite roller seat (21) and a thinning composite roller (22) rotatably mounted on the thinning composite roller seat (21), a second composite roller seat (24) and a second composite roller (23) rotatably mounted on the second composite roller seat (24); The axes of the transfer roller (11), the second thinning roller (12), the thinning composite roller (22) and the second composite roller (23) are all on the same horizontal plane and are arranged adjacent to each other in sequence; The second thinning roller (12) and the thinning composite roller (22) jointly thin the dry electrode film; The thinning composite roller (22) and the second composite roller (23) jointly composite the dry electrode film with the single-sided electrode film sheet / the double-sided electrode film sheet; The first frame (10) is provided with a first slide rail (41), a second slide rail (42) and a third slide rail (45); A first pulley (43) corresponding to the first slide rail (41) is provided at the bottom of the thinning composite roller seat (21), a second pulley (44) corresponding to the second slide rail (42) is provided at the bottom of the second composite roller seat (24), and a third pulley (46) corresponding to the third slide rail (45) is provided at the bottom of the first composite roller seat (13); The first composite roller seat (13), the thinning composite roller seat (21) and the second composite roller seat (24) are all detachably connected to the first frame (10).

3. The electrode composite device according to claim 2, characterized in that: The first frame (10) is provided with a limiting structure for limiting the movement of the first composite roller seat (13), the thinning composite roller seat (21) and the second composite roller seat (24) relative to the first frame (10).

4. The electrode composite device according to claim 2 or 3, characterized in that: The roller diameters of the transfer roller (11), the second thinning roller (12), the thinning composite roller (22) and the second composite roller (23) are in the following relationship: the second thinning roller (12) < the transfer roller (11) < the thinning composite roller (22) = the second composite roller (23); After the thinning roller group (1) thins the dry electrode film, the thinned electrode film adheres to the roller wall of the thinning composite roller (22) and enters the composite roller group (2).

5. The electrode composite device according to claim 3, characterized in that: The first frame (10) is also provided with a rough cutting knife group (61) and a fine cutting knife group (62), wherein the rough cutting knife group (61) is arranged on a side of the thinning roller group (1) away from the composite roller group (2), and the rough cutting knife group (61) is used to cut the dry electrode film fed into the thinning composite mechanism (100); The fine cutter group (62) is arranged at the bottom of the thinning composite roller (22) and is used to cut the dry electrode film thinned by the thinning roller group (1).

6. The electrode composite device according to claim 5, characterized in that: The fine cutter assembly (62) comprises a hand wheel (621), a screw rod (622), an upper slide rail (623), a lower slide rail (624), a left screw rod nut (625), a right screw rod nut (626), a left sliding seat (627), a right sliding seat (628), a left circular knife (629), a right circular knife (630), a left material receiving inclined plate (631), a right material receiving inclined plate (632), a left knife driving member (633) and a right knife driving member (634); The upper slide rail (623) is located above the screw rod (622) and is arranged parallel to the screw rod (622); The lower sliding rail (624) is located below the screw rod (622) and is arranged parallel to the screw rod (622); The hand wheel (621) is fixedly connected to the screw rod (622); The screw rod (622) has left threads and right threads on both sides respectively; The left screw nut (625) is in transmission connection with the left thread, and the right screw nut (626) is in transmission connection with the right thread; The left sliding seat (627) is fixed on the left screw nut (625) and is slidably arranged on the upper sliding rail (623) and the lower sliding rail (624); The right sliding seat (628) is fixed on the right screw nut (626) and is slidably arranged on the upper sliding rail (623) and the lower sliding rail (624); One end of the left material receiving inclined plate (631) is fixedly arranged on the left sliding seat (627), and is arranged on the side of the left circular knife (629) facing away from the right circular knife (630) and above the center of the left circular knife (629). The left material receiving inclined plate (631) is arranged with its inclination direction toward the bottom of the electrode composite device; One end of the right material receiving inclined plate (632) is fixedly arranged on the right sliding seat (628), and is arranged on a side surface of the right circular knife (630) facing away from the left circular knife (629) and above the center of the right circular knife (630). The left material receiving inclined plate (631) is arranged with its inclination direction toward the bottom of the electrode composite device; The fixed end of the left knife driving member (633) is arranged on the left sliding seat (627), and the driving member of the left knife driving member (633) is connected to the output end of the left circular knife (629); The fixed end of the right knife driving member (634) is arranged on the right sliding seat (628), and the driving member of the right knife driving member (634) is connected to the output end of the right circular knife (630).

7. The electrode composite device according to claim 5, characterized in that: The first frame (10) is also provided with a tension roller group (71), the tension roller group (71) is arranged between the rough cutting knife group (61) and the thinning roller group (1), and the tension roller group (71) comprises a swing motor, a left swing roller (712), a right swing roller (713), a first material-pulling roller (714) and a second material-pulling roller (715); The fixed end of the swing motor is arranged on the first frame (10); The left swing roller (712) is fixedly connected to the output end of the swing motor and is arranged on a side of the output end of the swing motor close to the rough cutting knife group (61); The right swing roller (713) is fixedly connected to the output end of the swing motor and is arranged on a side of the output end of the swing motor close to the thinning roller group (1); The horizontal positions of the swing motor, the left swing roller (712) and the right swing roller (713) are all lower than the horizontal position of the fine cutter group (62); The swing motor can drive the left swing roller (712) and the right swing roller (713) to swing with the output end of the swing motor as the rotation center; The first material-sliding roller (714) is located above the left swing roller (712) and is arranged between the left swing roller (712) and the output end of the swing motor; The second material-pulling roller (715) is located above the right swing roller (713) and is arranged between the right swing roller (713) and the output end of the swing motor; The dry electrode membrane is in rolling contact with the first sliding roller (714), the left swing roller (712), the right swing roller (713) and the second sliding roller (715) in sequence; wherein the dry electrode membrane is alternately conveyed between the first sliding roller (714) and the left swing roller (712), the dry electrode membrane is conveyed on the same side of the left swing roller (712) and the right swing roller (713), and the dry electrode membrane is alternately conveyed between the right swing roller (713) and the second sliding roller (715).

8. The electrode composite device according to claim 1, characterized in that: The unwinding and rewinding mechanism (200) further comprises a second frame (40), a thickness detection group (81), a second tension group (82) and a belt pressing group (83); The second frame (40) is provided with a tape taking-up path (401) and a tape unwinding path (402) located below the tape taking-up path (401); The thickness detection group (81) is arranged on the belt collection path (401) and is used to detect the thickness of the single-sided electrode membrane and the double-sided electrode membrane; The second tension group (82) and the belt pressing group (83) are arranged on the belt unwinding path (402), and the horizontal position of the belt pressing group (83) is lower than the horizontal position of the first rewinding roller (33) and the second rewinding roller (34). The belt pressing group (83) is used to press down the current collector and the single-sided electrode membrane released by the first rewinding roller (33), and the second tension group (82) is used to adjust the current collector and the single-sided electrode membrane pressed down by the belt pressing group (83).

9. The electrode composite device according to claim 1, characterized in that: The material unwinding and rewinding mechanism (200) comprises a first unwinding roller (33), a second unwinding roller (34), a left turntable (31), a right turntable (32), a left turntable shaft (211), a right turntable shaft (212), a left first passive wheel (213), a left second passive wheel (214), a right first passive wheel (215), a right second passive wheel (216), a first unwinding roller driving member (217), a second unwinding roller driving member (218), a first unwinding roller gear (219), a second unwinding roller gear (220), a left first transmission chain, a left second transmission chain, a left driving wheel (223), a right driving wheel (224), a right first transmission chain, and a right second transmission chain; The left turntable shaft (211) is arranged at the center of the left turntable (31) and is located on the side facing away from the right turntable (32); The right turntable shaft (212) is arranged at the center of the right turntable (32) and is located on the side facing away from the left turntable (31); The left first passive wheel (213) and the left second passive wheel (214) are rotatably mounted on the left turntable shaft (211), and the relative positions of the left first passive wheel (213) and the left second passive wheel (214) are fixed; The right first passive wheel (215) and the right second passive wheel (216) are rotatably mounted on the right turntable shaft (212), and the relative positions of the right first passive wheel (215) and the right second passive wheel (216) are fixed; The first retractable roller gear (219) is connected to one end of the first retractable roller (33); the first retractable roller gear (219), the left first passive wheel (213), and the left second passive wheel (214) are all located on the side of the same surface of the left turntable (31); The left first transmission chain is meshed with the first retractable roller gear (219) and the left first passive wheel (213); The first retractable roller driving member (217) is arranged on the left bracket (20), and the first retractable roller driving member (217) is provided with the left driving wheel (223), and the left second transmission chain is meshed with the left driving wheel (223) and the left second driven wheel (214); The second retractable roller gear (220) is connected to one end of the second retractable roller (34); the second retractable roller gear (220), the right first passive wheel (215), and the right second passive wheel (216) are all located on the side of the same surface of the right turntable (32); The right first transmission chain is meshed with the second retractable roller gear (220) and the right first driven wheel (215); The second retractable roller driving member (218) is arranged on the right bracket (30), and the second retractable roller driving member (218) is provided with the right driving wheel (224), and the right second transmission chain is meshed with the right driving wheel (224) and the right second passive wheel (216).

10. The electrode composite device according to claim 9, characterized in that: The left bracket (20) is provided with a left turntable driving member (225), and the output end of the left turntable driving member (225) is meshed with the left turntable (31) for driving the left turntable (31) to rotate.

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