Dry type electrode diaphragm manufacturing device

Abstract

The invention discloses a dry type electrode diaphragm manufacturing device. The dry type electrode diaphragm manufacturing device comprises a primary thinning mechanism, a rough cutting mechanism, a secondary thinning mechanism and a compounding mechanism which are sequentially arranged in the diaphragm conveying direction. The fine cutting mechanism is arranged between the secondary thinning mechanism and the compounding mechanism; the primary thinning mechanism is used for rolling the mixture into a thick film; the rough cutting mechanism is used for cutting off two side edges of the thick film, so that the thick film forms a flat film edge; the secondary thinning mechanism is used for thinning the thick film to form a thin film; the fine cutting mechanism is used for cutting the thin film, so that the thin film forms a flat film edge; the compounding mechanism is used for compounding the thin film and the current collector to form an electrode diaphragm; the compaction density of the electrode diaphragm can be further improved through secondary thinning, and the internal resistance of the manufactured battery is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of dry battery manufacturing equipment, and in particular to a dry electrode membrane manufacturing device. Background Art

[0002] In the current energy storage field, dry-process battery technology has attracted widespread attention due to its unique advantages. Dry-process batteries, especially lithium-ion batteries, play an important role in portable electronic devices, electric vehicles, and energy storage systems due to their high energy density, long cycle life, and good safety performance. The optimization of battery performance, especially the performance of positive and negative electrode materials, is the key to promoting the development of battery technology.

[0003] In the dry battery preparation process, a mixture of active material, conductive agent and binder is coated on the metal current collector, and then formed into electrodes by drying and compaction. However, in the existing dry battery preparation technology, the thickness control of positive and negative electrode materials mainly relies on a single thinning process, that is, compaction is directly performed after coating and drying to form an electrode of the required thickness. Although this method can achieve basic thickness control, the compaction density is relatively weak. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a manufacturing device that can reduce the thickness of a dry electrode membrane.

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

[0006] A dry electrode membrane manufacturing device comprises a primary thinning mechanism, a rough cutting mechanism, a secondary thinning mechanism and a composite mechanism which are sequentially arranged along the membrane transmission direction;

[0007] It also includes a fine cutting mechanism disposed between the secondary thinning mechanism and the composite mechanism;

[0008] The primary thinning mechanism is used to roll the mixture into a thick film; the rough cutting mechanism is used to cut off the two side edges of the thick film so that the thick film forms a smooth film edge; the secondary thinning mechanism is used to thin the thick film to form a thin film; the fine cutting mechanism is used to cut the thin film so that the thin film forms a smooth film edge; the composite mechanism is used to composite the thin film with the current collector to form an electrode membrane.

[0009] The beneficial effects of the present invention are:

[0010] Before preparing the positive and negative electrode mixture and compounding it with the current collector, the membrane made of the mixture is thinned twice. After the thick film is made for the first time, the primary thinning mechanism cuts and trims the edge of the thick film to prevent the edge of the formed thin film from exceeding the secondary thinning mechanism after the thick film is rolled by the secondary thinning mechanism, thereby further improving the compaction density of the electrode membrane and reducing the internal resistance of the manufactured battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the connection structure of a dry electrode membrane manufacturing device;

[0013] Figure 2 It is a schematic diagram (section view) of the connection structure of the integrated frame, rough cutting mechanism, secondary thinning mechanism, composite mechanism and fine cutting machine;

[0014] Figure 3 It is a schematic diagram of the structure of the shell, the secondary thinning mechanism and the composite mechanism;

[0015] Figure 4 It is one of the structural schematic diagrams of the first cutter group, the second cutter group and the cutter reverse transmission group;

[0016] Figure 5 This is the second structural schematic diagram of the first cutter group, the second cutter group and the cutter reverse transmission group;

[0017] Figure 6 It is a structural schematic diagram of a primary thinning mechanism;

[0018] Figure 7 It is the position relationship diagram of the composite roller and the third roller seat (exploded);

[0019] Figure 8 It is a positional relationship diagram of the third thinning roller and the first roller seat (exploded);

[0020] Fig. 9 is a positional relationship diagram of the first winding frame, the substrate supply mechanism and the winding mechanism;

[0021] Fig.10 It is one (part) of the structural schematic diagrams of the substrate supply mechanism and the winding mechanism;

[0022] Fig.11 This is the second (partial) structural diagram of the substrate supply mechanism and the winding mechanism;

[0023] Fig.12 It is a schematic structural diagram of the second belt pressing group. DETAILED DESCRIPTION

[0024] 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.

[0025] Reference Figure 1 , Figure 2 , a dry electrode membrane manufacturing device, comprising a primary thinning mechanism 1, a rough cutting mechanism 2, a secondary thinning mechanism 3 and a composite mechanism 4 arranged in sequence along the membrane transmission direction;

[0026] It also includes a fine cutting mechanism 5 disposed between the secondary thinning mechanism 3 and the composite mechanism 4;

[0027] The primary thinning mechanism 1 is used to roll the mixture into a thick film; the secondary thinning mechanism 3 is used to thin the thick film to form a thin film; under the premise of the same manufacturing materials, the connection strength of the thick film is greater than that of the thin film, which can avoid the breakage of the membrane during the conveying process in each mechanism; however, after the thick film is rolled, the film width may be greater than the width of the secondary thinning mechanism 3, resulting in a lack of support for the film edge and easy breakage of the film; therefore, a rough cutting mechanism 2 is provided to cut off the two side edges of the thick film so that the thick film forms a smooth film edge, so that the width of the film after rolling is smaller than the width of the secondary thinning mechanism 3; the fine cutting mechanism 5 is used to cut the film so that the film forms a smooth film edge, which can avoid the cracking of the film; the composite mechanism 4 is used to composite the film with the collector to form an electrode membrane; the secondary thinning mechanism 3 can further increase the compaction density of the electrode membrane and reduce the internal resistance of the manufactured battery. The fine cutting mechanism 5 is used to cut the film to avoid uneven edges of the formed film, to avoid the edge of the film exceeding the edge of the current collector, and to avoid direct contact between two films when manufacturing a battery, resulting in a short circuit of the battery.

[0028] The thick film and thin film mentioned above are formed by rolling and pressing the mixed material. In the process of cutting the thick film and thin film, dust may be generated, and the dust is adsorbed on the film, which may affect the thickness and density of the finished electrode membrane and the performance of the prepared battery. In order to reduce the influence of dust, in one embodiment, it also includes a housing 6, and the housing 6 is provided with an open film-passing channel, and the primary thinning mechanism 1, the rough cutting mechanism 2, the secondary thinning mechanism 3, the compound mechanism 4 and the fine cutting mechanism 5 are all arranged on the film-passing channel;

[0029] Reference Figure 3 A machine cavity 61 is provided at the bottom of the casing 6 and below the film-moving passage; a dust removal mechanism connected to the machine cavity 61 is provided on the casing 6, and the dust removal mechanism is used to remove dust from the film-moving passage and the machine cavity 61.

[0030] Specifically, refer to Figure 3 , Figure 5 The fine cutting mechanism 5 includes a first cutting knife group 51, a second cutting knife group 52, and a cutting knife reverse transmission group 53; the first cutting knife group 51 is provided with a first edge material guide 54 in the direction of the film material, the first edge material guide 54 is fixed on the first cutting knife group 51, and the first edge material guide 54 is used to guide the edge material cut by the first cutting knife group 51 to slide down into the machine cavity 61; the second cutting knife group 52 is provided with a second edge material guide 55 in the direction of the film material, the second edge material guide 55 is fixed on the second cutting knife group 52, and the second edge material guide 55 is used to guide the edge material cut by the second cutting knife group 52 to slide down into the machine cavity 61 to avoid edge material accumulation or interference with subsequent processes.

[0031] Reference Figure 5 More specifically, the first cutting knife group 51 further includes a left cutting knife 511 and a left cutting knife driving member 512; the second cutting knife group 52 further includes a right cutting knife 521 and a right cutting knife driving member 522;

[0032] The cutter reverse transmission group 53 includes a hand wheel 531, a screw rod 532, an upper slide rail 533, a lower slide rail 534, a left screw rod nut 535, a right screw rod nut 536, a left sliding seat 537, and a right sliding seat 538; the upper slide rail 533 is located above the screw rod 532 and is arranged parallel to the screw rod 532; the lower slide rail 534 is located below the screw rod 532 and is arranged parallel to the screw rod 532; the hand wheel 531 is fixedly connected to the screw rod 532; equidistant left threads and equidistant right threads are distributed on both sides of the screw rod 532; the left screw rod nut 535 is transmission-connected with the left thread, and the right screw rod nut 536 is transmission-connected with the right thread; the left sliding seat 537 is fixed on the left screw rod nut 535, and is slidably arranged on the upper slide rail 533 and the lower slide rail 534; the right sliding seat 538 is fixed on the right screw rod nut 536, and is slidably arranged on the upper slide rail 533 and the lower slide rail 534;

[0033] One end of the left material receiving inclined plate 631 is fixedly arranged on the left sliding seat 537, and is arranged on the side of the left cutter 511 facing away from the right cutter 521, and is located above the center of the circle of the left cutter 511, and the left material receiving inclined plate 631 is inclined 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 538, and is arranged on the side of the right cutter 521 facing away from the left cutter 511, and is located above the center of the circle of the right cutter 521, and the left material receiving inclined plate 631 is inclined toward the bottom of the electrode composite device;

[0034] The fixed end of the left knife driving member 512 is arranged on the left sliding seat 537, and the driving member of the left knife driving member 512 is connected to the output end of the left cutter 511; the fixed end of the right knife driving member 522 is arranged on the right sliding seat 538, and the driving member of the right knife driving member 522 is connected to the output end of the right cutter 521. By turning the hand wheel 531, the left sliding seat 537 and the right sliding seat 538 can be driven to move equidistantly closer to or away from each other, thereby adjusting the cutting accuracy of the film.

[0035] Reference Figure 1 In one embodiment, along the film transmission direction, a feeding mechanism 7 is provided upstream of the primary thinning mechanism 1, and a substrate supply mechanism 8 and a winding mechanism 9 are provided downstream of the composite mechanism 4. The feeding mechanism 7 is used to mix the active material, conductive agent, and binder required for preparing the dry electrode into a mixture, and feed the mixture into the primary thinning mechanism 1; the substrate supply mechanism 8 is used to supply a substrate composited with the film, such as a current collector; and the winding mechanism 9 is used to wind up the electrode film. In addition to feeding, the production of dry electrode membranes is completed by mechanical equipment, which can reduce labor costs and has a high degree of automation.

[0036] Reference Figure 2 , Figure 3Specifically, the secondary thinning mechanism 3 includes a first thinning roller 31 and a second thinning roller 32, and the first thinning roller 31 and the second thinning roller 32 cooperate with each other to thin the thick film;

[0037] A guide member 33 for guiding dust to fall into the machine cavity 61 is provided between the first thinning roller 31 and the second thinning roller 32 and below the first thinning roller 31 and the second thinning roller 32 .

[0038] Similarly, during the thinning process of the thick film, part of the mixed material may fall off, and the guide member 33 can guide the falling direction of the mixed material to prevent the mixed material from falling into other components and affecting the operation of the components.

[0039] More specifically, the housing 6 also includes an integrated frame 301, and the secondary thinning mechanism 3 and the composite mechanism 4 are both detachably mounted on the integrated frame 301, so that the secondary thinning mechanism 3 and the composite mechanism 4 can be quickly removed for inspection and maintenance.

[0040] Reference Figure 2 More specifically, the secondary thinning mechanism 3 also includes a third thinning roller 34, which rotates in close contact with the first thinning roller 31, and is arranged on the side of the first thinning roller 31 away from the second thinning roller 32. The radius size relationship of the first thinning roller 31, the second thinning roller 32, and the third thinning roller 34 is: the second thinning roller 32> the third thinning roller 34> the first thinning roller 31.

[0041] The radii of the first thinning roller 31 and the second thinning roller 32 are different. During the thinning process, different linear speeds are generated on both sides of the thick film. The speed at which the thick film moves on the side of the first thinning roller 31 is faster than the speed at which the thick film moves on the side of the second thinning roller 32. This helps to thin the thick film at a variable speed and can further apply shear force to the thick film to promote its fibrillation and improve the mechanical strength of the film.

[0042] When the radius of the first thinning roller 31 and the second thinning roller 32 are different, the first thinning roller 31 is easily deformed, which has the negative effect of uneven film thickness after secondary thinning and calendering. At the same time, therefore, the third thinning roller 34 that fits the first thinning roller 31 is provided to reduce the deformation of the first thinning roller 31 and reduce the occurrence of uneven film after secondary thinning. Specifically, the roller shaft length of the third thinning roller 34 may be equal to the roller shaft length of the first thinning roller 31.

[0043] Reference Figure 3 , Figure 6More specifically, the primary thinning mechanism 1 comprises a frame 11, a roller frame 12 detachably mounted on the frame 11, a large roller 13 and a small roller 14 mounted on the roller frame 12 and arranged vertically side by side, wherein the diameter of the large roller 13 is larger than that of the small roller 14;

[0044] The secondary thinning mechanism 3 further comprises a first roller seat 36, the third thinning roller 34 and the first thinning roller 31 are rotatably arranged on the first roller seat 36, and the third thinning roller 34 and the first thinning roller 31 are arranged side by side in a transverse direction;

[0045] The height of the roller frame 12 is equal to the width of the first roller seat 36, the large roller 13 has the same size as the third thinning roller 34, and the small roller 14 has the same size as the first thinning roller 31; the roller frame 12, the large roller 13, and the small roller 14 can be interchangeable with the first roller seat 36, the first thinning roller 31, and the third thinning roller 34.

[0046] The dependence of the device on a single component is reduced, the versatility between components is enhanced, and when a plurality of groups of roller frames 12, large rollers 13 and small rollers 14 are provided on the primary thinning mechanism 1, the operator can assemble them according to needs.

[0047] More specifically, the composite mechanism 4 can be detachably mounted on the integrated frame 301 , and is disposed adjacent to the secondary thinning mechanism 3 .

[0048] The secondary thinning mechanism 3 and the composite mechanism 4 can be easily disassembled from the integrated frame 301 by an innovative connection method. This design significantly improves the convenience of maintenance and cleaning. In addition, compared with the prior art, this solution avoids the need to set up independent support frames for them by integrating these two components into a single frame.

[0049] Reference Figure 3 In one embodiment, a shell 107 is provided outside the integrated frame 301. During the operation of the secondary thinning mechanism 3 and the composite mechanism 4, dust may be generated. The shell 107 can prevent the dust from flying into other equipment in the workshop. In order to facilitate observation of the operation status, a transparent observation window (not shown in the figure) can be provided on the shell 107, or the shell 107 can be provided as a fully transparent structure. When the equipment fails to work, the internal situation can be observed without disassembling the shell 107.

[0050] More specifically, the composite mechanism 4 includes a composite roller 41, and the composite frame 301 is detachably provided with a first roller seat 36, a third roller seat 37, a first pressure member 38 and a second pressure member 39; the third thinning roller 34 is rotatably provided on the first roller seat 36; the composite roller 41 is rotatably provided on the third roller seat 37; the first roller seat 36 and the third roller seat 37 are provided side by side;

[0051] The fixed end of the first pressure member 38 is disposed on the integrated frame 301, and the output end of the first pressure member 38 is disposed toward the third roller seat 37, and the output end of the first pressure member 38 is connected to the first roller seat 36; the fixed end of the second pressure member 39 is disposed on the integrated frame 301, and the output end of the second pressure member 39 is disposed toward the first roller seat 36, and the output end of the second pressure member 39 is connected to the third roller seat 37;

[0052] The output ends of the first pressure member 38 and the second pressure member 39 extend out to synchronously adjust the gap between the first thinning roller 31 and the second thinning roller 32, and the gap between the second thinning roller 32 and the composite roller 41, thereby reducing the complexity of the device;

[0053] More specifically, the first pressure member 38 and the second pressure member 39 are servo cylinders.

[0054] Reference Figure 2 More specifically, in order to reduce the adhesion of the mixed material to each roller, a first scraper blade 101, a second scraper blade 102, a third scraper blade 103 and a fourth scraper blade 132 are provided on the integrated frame 301. The first scraper blade 101 is arranged on one side of the second thinning roller 32 to scrape off the electrode film material on the second thinning roller 32; the second scraper blade 102 is arranged on one side of the composite roller 41 to scrape off the electrode film material on the composite roller 41; the third scraper blade 103 is arranged on one side of the third thinning roller 34 to scrape off the electrode film material on the surface of the third thinning roller 34; the fourth scraper blade 132 is arranged on one side of the second thinning roller 31 to scrape off the electrode film material on the surface of the second thinning roller 31.

[0055] More specifically, the first scraper 101 and the second scraper 102 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 machine cavity 61 or the dust removal mechanism, and the other end is provided at one side of the first scraper 101. The dust scraped off by the first scraper 101 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 machine cavity 61 or the dust removal mechanism, and the other end is provided at one side of the second scraper 102. The dust scraped off by the second scraper 102 is sucked away by the dust removal mechanism via the first dust removal pipe 17.

[0056] More specifically, a film outlet conveyor path is provided on the top of the integrated frame 301, and the electrode membrane flowing out through the composite mechanism 4 flows out along the film outlet conveyor path. The second scraper 102 is provided at the bottom of the film outlet conveyor path, and one end of the second dust removal pipe 18 is provided between the second scraper 102 and the film outlet conveyor path to more accurately absorb dust.

[0057] More specifically, the integrated frame 301 is provided with a first tensioning group 302 and a tension sensor 303, and the first tensioning group 302 and the tension sensor 303 are arranged in sequence along the running direction of the thick film. The first tensioning group 302 is arranged between the rough cutting mechanism 2 and the secondary thinning mechanism 3, and is used to tension the thick film after being cut by the rough cutting mechanism 2, and the tension sensor 303 is used to detect the tension of the thick film after being cut by the rough cutting mechanism 2; the operator can adjust the tensioning degree of the first tensioning group 302 on the thick film according to the value fed back by the tension sensor 303, and can also realize this function by setting a program.

[0058] Reference Figure 2 , Figure 8 More specifically, the integrated frame 301 is provided with a translation convex strip 121 arranged along the radial direction of the first thinning roller 31, and the bottom of the first roller seat 36 is provided with a translation groove 122 arranged corresponding to the translation convex strip 121. When the first pressure member 38 pushes the first roller seat 36 to move relative to the integrated frame 301, the translation groove 122 moves relative to the translation convex strip 121;

[0059] Reference Figure 7 The bottom of the third roller seat 37 is provided with a plurality of rollers 371 and a roller mounting box 372 arranged side by side. The rollers 371 are rotatably mounted in the roller mounting box 372, and the rollers 371 protrude from the roller mounting box 372. The rotating axis of the rollers 371 is parallel to the rotating axis of the composite roller 41.

[0060] When the second pressure member 39 pushes the third roller seat 37 to move relative to the integrated frame 301 , the roller 371 rolls, driving the third roller seat 37 to roll relative to the integrated frame 301 .

[0061] The translation convex strip 121 and the translation groove 122, the roller 371 and the roller mounting box 372 can not only play a guiding role, but also can be used to replace the function of the slide rail slider, and at the same time can prevent the first thinning roller 31 and the composite roller 41 from moving along their axial direction and escaping from the integrated frame 301. The accuracy of this design method does not have too much error with the slider guide method, and the cost is even lower.

[0062] Reference Figure 2More specifically, the integrated frame 301 is provided with a plurality of first slide rails 104, a plurality of second slide rails 105 and a plurality of third slide rails 106 which are parallel to each other; a first pulley block 123 which can be slidably arranged on the first slide rail 104 is provided at the bottom of the first roller seat 36; a plurality of second pulley blocks 124 which can be slidably arranged on the second slide rail 105 are provided at the bottom of the second roller seat 35; a plurality of third pulley blocks 125 which can be slidably arranged on the third slide rail 106 are provided at the bottom of the third roller seat 37; the first pulley block 123, the second pulley block 124 and the third pulley block 125 each include a plurality of pulleys;

[0063] By arranging the pulley and the slide rail to cooperate with each other, the secondary thinning mechanism 3 and the composite mechanism 4 can be quickly pulled out from the integrated frame 301, which is convenient for maintenance.

[0064] In the embodiment with the first pressure member 38 and the second pressure member 39, the first slide rail 104 and the third slide rail 106 are both provided with slide grooves, and the width of the slide grooves is greater than the width of the pulleys in the first pulley group 123 and the third pulley group 125, so as to avoid the first pressure member 38 and the second pressure member 39 from pushing and destroying the relative position relationship between the above-mentioned pulleys and the slide grooves, and also to avoid the pulleys and the slide grooves from getting stuck, affecting the first pressure member 38 to adjust the gap between the first thinning roller 31 and the second thinning roller 32, and affecting the second pressure member 39 to adjust the gap between the second thinning roller 32 and the composite roller 41.

[0065] Reference Figure 3 In order to prevent the secondary thinning mechanism 3 and the composite mechanism 4 from sliding off the integrated frame 301, a first blocking member 111 and a second blocking member 112 may be provided on the integrated frame 301; the first blocking member 111 is provided on both sides of the integrated frame 301 along the axial direction of the second thinning roller 32, and is used to fix the position of the second roller seat 35 on the integrated frame 301; the second blocking member 112 is provided on both sides of the integrated frame 301 along the axial direction of the composite roller 41, and is used to fix the position of the third roller seat 37 on the integrated frame 301;

[0066] Specifically, one end of the first blocking member 111 and the second blocking member 112 are fixed to the integrated frame 301 by screws, and the other end is protruded from the integrated frame 301, and is connected to the first roller seat 36 and the third roller seat 37; since the first roller seat 36 has limited the axial movement of the first roller seat 36 along the first thinning roller 31 through the translation convex strip 121 and the translation groove 122, there is no need to set an additional limiting structure for the first roller seat 36.

[0067] Reference Fig. 9 , Fig.10 , Fig.11In one embodiment, the winding mechanism 9 further includes a left rotating disk 352, a right rotating disk 351, a first rotating shaft 91, a second retracting rotating shaft 92, a first retracting frame 93, a thickness detector 931, a second tensioning group 932 and a first pressing belt group 933; the first rotating shaft 91 and the second retracting rotating shaft 92 are both rotatably disposed on the left rotating disk 352 at one end and rotatably disposed on the right rotating disk 351 at the other end; the first rotating shaft 91 is used to collect the electrode membrane; specifically, the electrode membrane is a single-sided membrane composed of a thin film and a current collector, or a double-sided membrane composed of a thin film and a single-sided membrane; the second retracting rotating shaft 92 is used to release the single-sided membrane or the current collector into the composite mechanism 4;

[0068] A tape taking-up path 934 and a tape unwinding path 936 located below the tape taking-up path 934 are provided on the first winding frame 93; a thickness detector 931 is provided on the tape taking-up path 934 to detect the thickness of the single-sided film and the double-sided film; the second tensioning group 932 and the first belt pressing group 933 are provided on the tape unwinding path 936, and the horizontal position of the first belt pressing group 933 is lower than the horizontal position of the first rotating shaft 91 and the second taking-up and unwinding rotating shaft 92, and the first belt pressing group 933 is used to press down the current collector and the single-sided film released by the first rotating shaft 91 to maintain the stability of the current collector and the single-sided film during the tape walking process; the second tensioning group 932 is used to adjust the current collector and the single-sided film pressed down by the first belt pressing group 933.

[0069] Reference Fig. 9 Specifically, a visual inspection device 935 is also provided on the belt collection path 934. The visual inspection device 935 is used to detect whether the film is aligned with the current collector. If it is not correctly aligned, it may cause the motor resistance to be large and a short circuit to occur. The visual inspection device 935 replaces manual monitoring, further reducing labor costs and improving the intelligence of the equipment.

[0070] Specifically, the visual detection device 935 is a CCD camera;

[0071] In one embodiment, the winding mechanism 9 and the substrate supply mechanism 8 are arranged on the same device, and specifically include a left rotating shaft 913, a right rotating shaft 914, a left front driven wheel 915, a left rear driven wheel 916, a right front driven wheel 917, a right rear driven wheel 918, a first rotating shaft driving member 919, a second rotating shaft driving member 920, a first gear 921, a second gear 922, a left first transmission chain (not shown in the figure), a left second transmission chain (not shown in the figure), a left driving wheel 923, a right driving wheel 924, a right first transmission chain (not shown in the figure) and a right second transmission chain (not shown in the figure);

[0072] The left rotating shaft 913 is disposed at the center of the left rotating disk 352 and is located on the side facing away from the right rotating disk 351;

[0073] The right rotating shaft 914 is disposed at the center of the right rotating disk 351 and is located on the side facing away from the left rotating disk 352;

[0074] The left front driven wheel 915 and the left rear driven wheel 916 are rotatably mounted on the left rotating shaft 913, and the relative positions of the left front driven wheel 915 and the left rear driven wheel 916 are fixed;

[0075] The right front driven wheel 917 and the right rear driven wheel 918 are rotatably mounted on the right rotating shaft 914, and the relative positions of the right front driven wheel 917 and the right rear driven wheel 918 are fixed;

[0076] The first gear 921 is connected to one end of the first rotating shaft 91, and the first gear 921, the left front driven wheel 915, and the left rear driven wheel 916 are all located on the side of the same surface of the left rotating disk 352;

[0077] The left first transmission chain is meshed with the first gear 921 and the left front driven wheel 915;

[0078] The first rotating shaft driving member 919 is disposed on the left bracket 20, and a left driving wheel 923 is disposed on the first rotating shaft driving member 919, and the left second transmission chain is meshed with the left driving wheel 923 and the left rear driven wheel 916;

[0079] The second gear 922 is connected to one end of the second retractable shaft 92, and the second gear 922, the right front driven wheel 917, and the right rear driven wheel 918 are all located on the side of the same surface of the right turntable 351;

[0080] The right first transmission chain is meshed with the second gear 922 and the right front driven wheel 917;

[0081] The second rotating shaft driving member 920 is disposed on the right bracket 30 , and a right driving wheel 924 is disposed on the second rotating shaft driving member 920 . The right second transmission chain is meshed with the right driving wheel 924 and the right rear driven wheel 918 .

[0082] The working principle of this embodiment is as follows:

[0083] The first rotating shaft 91 is located at the winding position, and the second winding and unwinding rotating shaft 92 is located at the unwinding position;

[0084] The first rotating shaft driving member 919 drives the left driving wheel 923 to rotate, and through the transmission of the left second transmission chain, drives the left rear driven wheel 916 to rotate, and the left rear driven wheel 916 drives the left front driven wheel 915 to rotate synchronously. Under the drive of the left first transmission chain, the first gear 921 rotates and drives the first rotating shaft 91 to rotate by itself, thereby realizing unwinding;

[0085] The second shaft driving member 920 drives the right driving wheel 924 to rotate, and through the transmission of the right second transmission chain, drives the right rear driven wheel 918 to rotate, and the right rear driven wheel 918 drives the right front driven wheel 917 to rotate synchronously. Under the drive of the right first transmission chain, the second gear 922 rotates and drives the second retractable shaft 92 to rotate on its own axis, thereby realizing unwinding;

[0086] In this embodiment, a control circuit board and a winding thickness sensor may be provided on the right turntable 351 or the left turntable 352, 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 rotating shaft 91 as an example, if the left driving wheel 923 is used to directly drive the first gear 921 for transmission, the left driving wheel 923 and the first gear 921 need to be located on the same plane, and as the left turntable 352 rotates, the wires on its inner surface are easily entangled with the left driving wheel 923, which not only affects the rotation of the left turntable 352, but also causes the left driving wheel 923 to be unable to mesh with the first gear 921, and in this embodiment, since the left front driven wheel 915 and the left rear driven wheel 916 are both located on the left rotating shaft 913, the left driving wheel 923 and the first gear 921 are located on two planes, which can avoid the wires on the inner surface of the left turntable 352 from being entangled with the left driving wheel 923.

[0087] 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 352 to drive the left turntable 352 to rotate.

[0088] More specifically, a plurality of teeth are provided on the circumference of the left turntable 352 , 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 352 to rotate.

[0089] The left turntable driving member 225 drives the left turntable 352 and the right turntable 351 to rotate coaxially, and does not interfere with the transmission drive structure of the first rotating shaft 91 and the transmission drive structure of the second retractable rotating shaft 92, which is convenient for maintenance and installation.

[0090] In one embodiment, the winding mechanism 9 also includes a winding machine shell (not shown in the figure), which encloses a left rotating shaft 913, a right rotating shaft 914, a left front driven wheel 915, a left rear driven wheel 916, a right front driven wheel 917, a right rear driven wheel 918, a first rotating shaft driving member 919, a second rotating shaft driving member 920, a first gear 921, a second gear 922, a left first transmission chain, a left second transmission chain, a left driving wheel 923, a right driving wheel 924, a right first transmission chain and a right second transmission chain to avoid accidental touch by the operator; and for the convenience of winding, the first rotating shaft 91 and the second retractable rotating shaft 92 are exposed outside the winding machine shell.

[0091] Furthermore, in the winding machine housing, along the transmission direction of the single-sided film or the double-sided film, a third tensioning group 925, a second deflection correcting group 926, and a second pressing belt group 927 are sequentially arranged; the third tensioning group 925 is used to tension the single-sided film or the double-sided film detected by the thickness detector 931; the second deflection correcting group 926 is used to correct the single-sided film or the double-sided film to ensure that the single-sided film or the double-sided film remains flat during winding; Fig.12 The second belt pressing group 927 includes a base plate 9272 and two pressing pieces 9271 disposed on the upper part of the base plate 9272. There is a gap between the pressing piece 9271 and the base plate 9272. The single-sided film or the double-sided film is conveyed in the gap. A second observation window (not shown in the figure) is disposed on the winding machine housing and located at the position of the second belt pressing group 927. Through the second observation window, the operator can observe the conveying of the single-sided film or the double-sided film between the two pressing pieces 9271.

[0092] More specifically, the side of the second pressing belt set 927 facing the substrate 9272 is a circular arc surface to prevent scratching of the single-sided film or the double-sided film;

[0093] More specifically, the second observation window is arranged to be tilted upward for easy observation.

[0094] More specifically, a reel diameter detection device 929 is also provided in the reel housing, and the reel diameter detection device 929 is used to detect the reel diameter of the material reel collected on the first rotating shaft 91 and the second reel-in and reel-out rotating shaft 92, to ensure that the reel diameter of the collected single-sided film or double-sided film meets the quality requirements, and the film amount of the current collector or single-sided film during the unwinding process can be estimated by the numerical value fed back by the reel diameter detection device 929, so as to facilitate the operator to replenish in time;

[0095] More specifically, the reel diameter detection device 929 is an ultrasonic reel diameter detector.

[0096] 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. A dry electrode membrane manufacturing device, characterized in that: It comprises a primary thinning mechanism (1), a rough cutting mechanism (2), a secondary thinning mechanism (3) and a composite mechanism (4) which are sequentially arranged along the film transmission direction; It also includes a fine cutting mechanism (5) disposed between the secondary thinning mechanism (3) and the composite mechanism (4); The primary thinning mechanism (1) is used to roll the mixture into a thick film; the rough cutting mechanism (2) is used to cut off the two side edges of the thick film so that the thick film forms a smooth film edge; the secondary thinning mechanism (3) is used to thin the thick film to form a thin film; the fine cutting mechanism (5) is used to cut the thin film so that the thin film forms a smooth film edge; the composite mechanism (4) is used to composite the thin film with a current collector to form an electrode membrane.

2. The dry electrode membrane manufacturing device according to claim 1, characterized in that: It also comprises a casing (6), wherein the casing (6) is provided with an open film-passing passage, and the primary thinning mechanism (1), the rough cutting mechanism (2), the secondary thinning mechanism (3), the composite mechanism (4) and the fine cutting mechanism (5) are all arranged on the film-passing passage; A machine cavity (61) is provided at the bottom of the housing (6) and below the film-passing passage; The housing (6) is provided with a dust removal mechanism connected to the machine cavity (61), and the dust removal mechanism is used to absorb dust in the film passage and the machine cavity (61).

3. The dry electrode membrane manufacturing device according to claim 2, characterized in that: The fine cutting mechanism (5) comprises a first cutting knife group (51), a second cutting knife group (52), and a cutting knife reverse transmission group (53); The first cutting knife group (51) is provided with a first edge material guide (54) in the direction of the film material, the first edge material guide (54) is fixed on the first cutting knife group (51), and the first edge material guide (54) is used to guide the edge material cut by the first cutting knife group (51) to slide down into the machine cavity (61); The second cutting knife group (52) is provided with a second edge material guide (55) in the direction of the film material, and the second edge material guide (55) is fixed on the second cutting knife group (52). The second edge material guide (55) is used to guide the edge material cut by the second cutting knife group (52) to slide down into the machine cavity (61).

4. The dry electrode membrane manufacturing device according to claim 1, characterized in that: Along the film transmission direction, a feeding mechanism (7) is provided upstream of the primary thinning mechanism (1), and a substrate supply mechanism (8) and a winding mechanism (9) are provided downstream of the composite mechanism (4).

5. The dry electrode membrane manufacturing device according to claim 2, characterized in that: The secondary thinning mechanism (3) comprises a first thinning roller (31) and a second thinning roller (32), wherein the first thinning roller (31) and the second thinning roller (32) cooperate with each other to thin the thick film; A guide member (33) for guiding dust to fall into the machine cavity (61) is provided between the first thinning roller (31) and the second thinning roller (32), and is located below the first thinning roller (31) and the second thinning roller (32).

6. The dry electrode membrane manufacturing device according to claim 5, characterized in that: The housing (6) further comprises an integrated frame (301), and the secondary thinning mechanism (3) and the composite mechanism (4) can be detachably mounted on the integrated frame (301).

7. The dry electrode membrane manufacturing device according to claim 5, characterized in that: The secondary thinning mechanism (3) further comprises a third thinning roller (34), the third thinning roller (34) rotates in close contact with the first thinning roller (31), the third thinning roller (34) is arranged on a side of the first thinning roller (31) away from the second thinning roller, and the radius size relationship of the first thinning roller (31), the second thinning roller (32) and the third thinning roller (34) is: the second thinning roller (32)> the third thinning roller (34)> the first thinning roller (31).

8. The dry electrode membrane manufacturing device according to claim 7, characterized in that: The primary thinning mechanism (1) comprises a frame (11), a roller frame (12) detachably mounted on the frame (11), a large roller (13) and a small roller (14) mounted on the roller frame (12) and arranged vertically side by side, wherein the diameter of the large roller (13) is larger than that of the small roller (14); The secondary thinning mechanism (3) comprises a first roller seat (36), a third thinning roller (34) and the first thinning roller (31) which are rotatably arranged on the first roller seat (36) and are arranged side by side in a transverse direction; The height of the roller frame (12) is equal to the width of the first roller seat (36), the large roller (13) and the third thinning roller (34) have the same size, and the small roller (14) and the first thinning roller (31) have the same size; The roller frame (12), the large roller (13), and the small roller (14) are interchangeable with the first roller seat (36), the first thinning roller (31), and the third thinning roller (34).

9. The dry electrode membrane manufacturing device according to claim 8, characterized in that: The composite mechanism (4) comprises a composite roller (41), and the composite frame (301) is detachably provided with a second roller seat (35), a third roller seat (37), a first pressure member (38) and a second pressure member (39); The third thinning rollers (34) are all rotatably mounted on the second roller seat (35); The composite roller (41) is rotatably mounted on the third roller seat (37); The first roller seat (36), the second roller seat (35) and the third roller seat (37) are arranged side by side; The fixed end of the first pressure member (38) is arranged on the integrated frame (301), the output end of the first pressure member (38) is arranged toward the third roller seat (37), and the output end of the first pressure member (38) is connected to the first roller seat (36); The fixed end of the second pressure member (39) is arranged on the integrated frame (301), the output end of the second pressure member (39) is arranged toward the first roller seat (36), and the output end of the second pressure member (39) is connected to the third roller seat (37); The output ends of the first pressure member (38) and the second pressure member (39) extend out to adjust the gap between the first thinning roller (31) and the second thinning roller (32), and to adjust the gap between the second thinning roller (32) and the composite roller (41).

10. The dry electrode membrane manufacturing device according to claim 9, characterized in that: The integrated frame (301) is provided with a translation convex strip (121) radially arranged along the first thinning roller (31), and the bottom of the first roller seat (36) is provided with a translation groove (122) corresponding to the translation convex strip (121), and when the first pressure member (38) pushes the first roller seat (36) to move relative to the integrated frame (301), the translation groove (122) moves relative to the translation convex strip (121); The bottom of the third roller seat (37) is provided with a plurality of rollers (371) and a roller mounting box (372) arranged side by side, the roller (371) is rotatably mounted in the roller mounting box (372), and the roller (371) protrudes from the roller mounting box (372), and the rotation axis of the roller (371) is parallel to the rotation axis of the composite roller (41); When the second pressure member (39) pushes the third roller seat (37) to move relative to the integrated frame (301), the roller (371) rolls, driving the third roller seat (37) to roll relative to the integrated frame (301).

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