Dry film forming and continuous rolling composite electrode equipment

Abstract

The utility model belongs to the technical field of new energy lithium batteries, and particularly provides dry film forming and continuous rolling composite electrode equipment, which comprises a positive electrode diaphragm mechanism, a negative electrode diaphragm mechanism and a composite diaphragm mechanism, diaphragms formed by the positive electrode diaphragm mechanism and the negative electrode diaphragm mechanism are compounded by the composite diaphragm mechanism to form an electrode plate, and the composite diaphragm mechanism is connected with the positive electrode diaphragm mechanism and the negative electrode diaphragm mechanism. Each of the positive electrode diaphragm mechanism and the negative electrode diaphragm mechanism comprises a spiral feeding assembly, a casting roller, a plurality of calendering rollers and a composite roller which are sequentially arranged along the tape conveying direction, the rotation directions of two adjacent rollers are opposite, the gap between the two rollers is sequentially reduced along the tape conveying direction, and meanwhile, the rotation speed is sequentially increased along the tape conveying direction; and a slit for a current collector in the composite diaphragm mechanism to pass through is formed between the two composite rollers. Through the arrangement of the positive electrode diaphragm mechanism, the negative electrode diaphragm mechanism and the composite diaphragm mechanism, the equipment is compact in structure and small in occupied area, and the arrangement of multi-roller continuous rolling is combined, so that the manual turning sequence can be reduced, and the quality of an electrode plate can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy lithium batteries, and relates to dry film-forming and continuous rolling composite electrode equipment. Background Art

[0002] There are currently two types of dry electrode processes: powder spraying and binder fiberization. Powder spraying is prone to component segregation and unevenness, making it difficult to achieve. Therefore, binder fiberization dry electrode technology is the mainstream. The main process is to mix the binder, active material and conductive agent evenly to form a fibrillated powder, and then use the friction force in the calendering process to further fiberize the binder and prepare it into a dry electrode film. The dry electrode and the current collector are composited to form a dry electrode.

[0003] There are many deficiencies in the dry film forming and calendering process: 1) Due to uneven feeding before calendering, the thickness of the film is inconsistent after calendering, which seriously affects the surface density of the film; 2) After the mixed powder is calendered into film, the fiber content of the binder material is not high, and the bonding strength and toughness are both small, so the belt is easy to break, which seriously affects the belt speed of the film (currently ≤10m / min) and the film production capacity; 3) The film calendering and composite processes are separated, the sequence is cumbersome, the additional labor cost is increased, the floor space is large, and the equipment cost is high; 4) The local thickness is prone to inconsistency in the width direction of the film, and the local thickness cannot be adjusted. Utility Model Content

[0004] In view of the technical problems in the prior art, the utility model provides a dry film-forming and continuous rolling composite electrode equipment, comprising a positive electrode membrane mechanism, a negative electrode membrane mechanism and a composite membrane mechanism, wherein the positive electrode membrane mechanism and the negative electrode membrane mechanism are symmetrically arranged, and the positive electrode membrane and the negative electrode membrane formed by the positive electrode membrane mechanism and the negative electrode membrane mechanism are combined with the composite membrane mechanism to form an electrode sheet, and the positive electrode membrane mechanism and the negative electrode membrane mechanism both include a spiral feeding assembly, a casting roller, a plurality of calendering rollers and a composite roller arranged in sequence along the belt walking direction, and both ends of the casting roller, the plurality of calendering rollers and the composite roller are rotatably connected to the frame through a bearing seat, the rotation directions of the casting roller and the calendering roller, two adjacent calendering rollers, and the calendering roller and the composite roller are opposite, and the gap between the two decreases in sequence along the belt walking direction, and the rotation speeds of the casting roller, the calendering roller and the composite roller increase in sequence along the belt walking direction, and a slit for the current collector in the composite membrane mechanism to pass through is formed between the two composite rollers.

[0005] Furthermore, the spiral feeding assembly includes a mixing tube, a spiral rod and an extrusion die head. A feed port is provided at the top of one end of the mixing tube, and a discharge port is provided at the end of the other end. The feed port is connected to the silo, and the discharge port is connected to the extrusion die head. The spiral rod is rotatably installed in the mixing tube, and the lip of the extrusion die head is connected to the casting roller.

[0006] Furthermore, an adjusting mechanism for adjusting the local opening of the lip is installed in the lip of the extrusion die head.

[0007] Furthermore, a gap adjustment mechanism is provided between two adjacent bearing seats, and the gap adjustment mechanism includes a servo motor, a screw rod and two limit wedges. The servo motor is fixedly mounted on one of the bearing seats through a support frame, and the inclined surfaces of the two limit wedges that are close to each other are fitted, and the straight surfaces that are far away from each other are respectively fitted with the two bearing seats, and one of the limit wedges is fixedly connected to the bearing seat, and the other limit wedge is slidably connected along the inclined surface direction, and a threaded hole is opened on the top thereof, one end of the screw rod is fixedly connected to the output shaft of the servo motor, and the other end is threadedly screwed with the threaded hole.

[0008] Furthermore, the casting roller, calendering roller and composite roller are all provided with temperature control components.

[0009] Furthermore, the composite diaphragm mechanism includes a substrate unwinding wheel, an upper tensioning wheel group, a preheating assembly, a lower tensioning wheel group and a pole piece winding wheel which are arranged in sequence along the belt walking direction; the substrate unwinding wheel, the upper tensioning wheel group and the preheating assembly are located above the positive electrode diaphragm mechanism and the negative electrode diaphragm mechanism; the lower tensioning wheel group and the pole piece winding wheel are located below the positive electrode diaphragm mechanism and the negative electrode diaphragm mechanism; the current collector wound on the substrate unwinding wheel passes through the upper tensioning wheel group and the preheating assembly, passes through the slit, and is composited with the positive electrode diaphragm and the negative electrode diaphragm to form an electrode sheet; the electrode sheet is connected to the pole piece winding wheel after passing through the lower tensioning wheel group.

[0010] Furthermore, the composite diaphragm mechanism also includes a thickness detection component, which is installed between the lower tensioning wheel group and the slit and is located directly below the slit.

[0011] Beneficial effects:

[0012] 1. In the utility model, the positive electrode diaphragm mechanism and the negative electrode diaphragm mechanism and the composite diaphragm mechanism including a spiral feeding component, a casting roller, a plurality of calendering rollers, and a composite roller are arranged, so that the equipment structure can be compact and the footprint can be small. At the same time, it can reduce the manual sequence change and the production efficiency is high. Combined with the setting of multi-roller continuous rolling, it can ensure that the thickness of the positive electrode diaphragm and the negative electrode diaphragm is uniform and the film quality is improved. At the same time, when the multi-rollers are rolled back to back, the outer steel roller can provide strong support for the inner steel roller, which can reduce the bending deformation of the inner steel roller. Therefore, the rolling accuracy can be improved step by step, and the film quality can be further improved. In addition, combined with the setting of the rotation speed increasing successively along the belt walking direction, it can avoid the diaphragm from loosening and sagging.

[0013] 2. In the utility model, by setting the mixing tube, the spiral rod and the extrusion die head, the mixing quality of the powder can be improved, and at the same time, the continuous and stable supply of the mixed material can be ensured; by setting the adjustment mechanism inside the lip, the uniformity of the positive electrode diaphragm and the negative electrode diaphragm can be improved, and the film quality can be further improved.

[0014] 3. In the present invention, by setting up a gap adjustment mechanism including a servo motor, a screw rod and two limit wedges, the forward and reverse rotation of the servo motor can be used to adjust the gap between two adjacent rollers, thereby adjusting the thickness of the positive and negative diaphragms.

[0015] 4. In the present invention, by setting the temperature control component, the positive electrode membrane and the negative electrode membrane can have a suitable rolling temperature at different positions to ensure the film quality.

[0016] 5. In the utility model, by setting the substrate unwinding wheel, the upper tensioning wheel group, the preheating component, the lower tensioning wheel group and the electrode sheet winding wheel, it is possible to conveniently realize the composite of the current collector with the positive electrode membrane and the negative electrode membrane to form an electrode sheet, while ensuring the composite quality, and also conveniently collecting the electrode sheets; combined with the setting of the thickness detection component, the thickness of the electrode sheet can be conveniently and quickly detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a top view of the installation structure of the positive electrode diaphragm mechanism and the negative electrode diaphragm mechanism of the utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of the gap adjustment mechanism of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the utility model when the diaphragm is relaxed and drooping;

[0022] Figure 5 It is a schematic diagram of the velocity gradient position structure of the utility model.

[0023] Description of reference numerals:

[0024] 1. Positive electrode diaphragm mechanism; 2. Negative electrode diaphragm mechanism; 3. Composite diaphragm mechanism; 31. Substrate unwinding wheel; 32. Upper tensioning wheel group; 33. Preheating assembly; 34. Lower tensioning wheel group; 35. Pole piece winding wheel; 36. Thickness detection assembly; 4. Electrode sheet; 5. Spiral feeding assembly; 51. Mixing tube; 52. Screw rod; 53. Extrusion die; 54. Material silo; 6. Casting roller; 7. Calendering roller; 8. Composite roller; 9. Bearing seat; 10. Current collector; 11. Servo motor; 12. Screw rod; 13. Limit wedge; 14. Support frame. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] The utility model provides a dry film forming and continuous rolling composite electrode equipment, such as Figure 1 , Figure 2As shown, it includes a positive electrode diaphragm mechanism 1, a negative electrode diaphragm mechanism 2 and a composite diaphragm mechanism 3, wherein the positive electrode diaphragm mechanism 1 and the negative electrode diaphragm mechanism 2 are symmetrically arranged, and the positive electrode diaphragm and the negative electrode diaphragm formed by the positive electrode diaphragm mechanism 1 and the negative electrode diaphragm mechanism 2 are combined with the composite diaphragm mechanism 3 to form an electrode sheet 4, and the composite diaphragm mechanism 3 includes a substrate unwinding wheel 31, an upper tensioning wheel group 32, a preheating component 33, a lower tensioning wheel group 34 and a pole piece winding wheel 35 arranged in sequence along the belt walking direction, wherein the substrate unwinding wheel 31, the upper tensioning wheel group 32 and the preheating component 33 are located above the positive electrode diaphragm mechanism 1 and the negative electrode diaphragm mechanism 2, and the lower tensioning wheel group 34 and the pole piece winding wheel 35 are located below the positive electrode diaphragm mechanism 1 and the negative electrode diaphragm mechanism 2, and the current collector 10 wound on the substrate unwinding wheel 31 passes through the slit after passing through the upper tensioning wheel group 32 and the preheating component 33. The electrode sheet 4 is formed by compounding with the positive electrode diaphragm and the negative electrode diaphragm. The electrode sheet 4 is connected to the electrode sheet winding wheel 35 after passing through the lower tensioning wheel group 34. The positive electrode diaphragm mechanism 1 and the negative electrode diaphragm mechanism 2 both include a spiral feeding assembly 5, a casting roller 6, a plurality of calendering rollers 7 and a composite roller 8 arranged in sequence along the belt running direction, wherein the calendering roller 7 can also be one, and the purpose of using a plurality of calendering rollers is to achieve a higher compaction density. Both ends of the casting roller 6, the plurality of calendering rollers 7 and the composite roller 8 are rotatably connected to the frame through a bearing seat 9. The rotation directions of the casting roller 6 and the calendering roller 7, the two adjacent calendering rollers 7, and the calendering roller 7 and the composite roller 8 are opposite, and the gap between the two decreases in sequence along the belt running direction. The rotation speeds of the casting roller 6, the calendering roller 7 and the composite roller 8 increase in sequence along the belt running direction, and a slit for the current collector 10 in the composite diaphragm mechanism 3 to pass through is formed between the two composite rollers 8.

[0032] In this embodiment, by setting up the positive electrode diaphragm mechanism 1 and the negative electrode diaphragm mechanism 2 and the composite diaphragm mechanism 3 including the spiral feeding assembly 5, the casting roller 6, several calendering rollers 7, and the composite roller 8, the equipment structure can be compact and the floor space is small. At the same time, it can reduce the manual sequence change and the production efficiency is high. Combined with the setting of multi-roller continuous rolling, it can ensure that the thickness of the positive electrode diaphragm and the negative electrode diaphragm is uniform and the film forming quality is improved. At the same time, the multi-roller back-to-back rolling, the outer steel roller can provide strong support for the inner steel roller, which can reduce the bending deformation of the inner steel roller, so the rolling accuracy can be improved step by step, and the film forming quality is further improved. In addition, combined with the setting of increasing the rotation speed in the direction of the belt, it can avoid the diaphragm from loosening and sagging. Specifically, because the thickness of the diaphragm is gradually thinned and calendered after passing through the casting roller 6, the calendering roller 7, and the composite roller 8, the corresponding diaphragm length will gradually become longer. If the linear speeds of the front and rear rollers are consistent, the diaphragm will become loose and droopy after long-term production. Figure 4 As shown, the linear speed of the roller is accelerated step by step to avoid the diaphragm from loosening and sagging, that is, Figure 1In the equation V0 = V1> V2> V3; in addition, when the speed of the rear roller is greater than that of the front roller, the linear speed difference between the casting roller 6 and the calendering roller 7 will cause a speed gradient to appear in the thickness direction of the film, such as Figure 5 As shown, when rolling, the material speed of the film near the casting roller 6 is close to the linear speed of the casting roller 6 surface, the material speed of the film near the calendering roller 7 is close to the linear speed of the calendering roller 7, and the speed of the middle layer of the film is between the linear speeds of the casting roller 6 and the calendering roller 7. Because the binder in the powder has a characteristic that when the material temperature t≥19°C, the material will produce long and thin fibers on the surface when subjected to shear (friction) force, and form a cross-linked fiber network during rolling, so that the film has a certain toughness, so Figure 5 The velocity gradient in the medium is beneficial to further fiberization of the binder and can orient the fibers inside the material, increase toughness and tension, reduce wrinkles, and improve film quality.

[0033] In the present invention, preferably, Figure 1 , Figure 2 As shown, the spiral feeding assembly 5 includes a mixing tube 51, a spiral rod 52 and an extrusion die 53. A feed port is provided at the top of one end of the mixing tube 51, and a discharge port is provided at the end of the other end. The feed port is connected with a silo 54, and the discharge port is connected with the extrusion die 53. The spiral rod 52 is rotatably installed in the mixing tube 51, and the lip of the extrusion die 53 is connected with the casting roller 6; an adjusting mechanism for adjusting the local opening of the lip is installed in the lip of the extrusion die 53.

[0034] In this embodiment, by setting the mixing tube 51, the screw rod 52 and the extrusion die head 53, the mixing quality of the powder can be improved, and at the same time, the continuous and stable supply of the mixed material can be ensured; by setting the adjustment mechanism inside the lip, the uniformity of the positive electrode diaphragm and the negative electrode diaphragm can be improved, and the film quality can be further improved.

[0035] In the present invention, preferably, Figure 2 and Figure 3 As shown, a gap adjustment mechanism is provided between two adjacent bearing seats 9, and the gap adjustment mechanism includes a servo motor 11, a screw rod 12 and two limit wedges 13. The servo motor 11 is fixedly mounted on one of the bearing seats 9 through a support frame 13. The inclined surfaces of the two limit wedges 13 that are close to each other fit together, and the straight surfaces that are far away from each other fit together with the two bearing seats 9 respectively. One of the limit wedges 13 is fixedly connected to the bearing seat 9, and the other limit wedge 13 is slidably connected along the inclined surface direction, and a threaded hole is opened on the top thereof. One end of the screw rod 12 is fixedly connected to the output shaft of the servo motor, and the other end is threadedly screwed with the threaded hole.

[0036] In this embodiment, by setting up a gap adjustment mechanism including a servo motor 11, a screw rod 12 and two limit wedges 13, the gap between two adjacent rollers can be adjusted by utilizing the forward and reverse rotation of the servo motor 11, thereby adjusting the thickness of the positive and negative electrode diaphragms.

[0037] In the present invention, preferably, Figure 1 As shown, the casting roller 6, the calendering roller 7 and the composite roller 8 are all provided with temperature control components.

[0038] In this embodiment, by setting the temperature control component, the positive electrode membrane and the negative electrode membrane can have a suitable rolling temperature at different positions to ensure the film forming quality.

[0039] In the present invention, preferably, Figure 1 As shown, the composite diaphragm mechanism 3 further includes a thickness detection component 36, which is installed between the lower tensioning wheel group 34 and the slit and is located directly below the slit.

[0040] In this embodiment, by providing the thickness detection component 36 , the thickness of the electrode sheet 4 can be detected conveniently and quickly.

[0041] Working principle:

[0042] like Figure 1 , Figure 2 As shown, a mixed powder containing an active agent, a conductive agent, and a binder enters a mixing tube 51 from a silo 54. After being heated and melted, the powder is pushed to an extrusion die 53 through a screw rod 52, and extruded from the lip of the extrusion die 53 into an initial film. The initial film is cast onto a casting roller 6 and conveyed to a roller between the casting roller 6 and a calendering roller 7 for thinning. Then, the initial film adheres to the calendering roller 7 and is conveyed to a roller gap formed by the calendering roller 7 and a composite roller 8 for secondary thinning into a positive electrode film or a negative electrode film. After the current collector 10 is unwound from the substrate unwinding wheel 31, it passes through the upper tensioning wheel group 32 and the preheating assembly 33 and then passes through the two symmetrically arranged left and right composite rollers 8. At this time, the current collector 10, together with the positive electrode membrane and the negative electrode membrane that arrive at the left and right sides at the same time, passes through the slit formed between the two composite rollers 8, and the positive electrode membrane and the negative electrode membrane are simultaneously composited to the two sides of the current collector 10 to form an electrode sheet 4. After the thickness detection and the lower tensioning wheel group 34, the electrode sheet 4 is rolled into a neat roll by the electrode sheet winding wheel 35.

[0043] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A dry film forming and continuous rolling composite electrode equipment, comprising a positive electrode membrane structure (1), a negative electrode membrane structure (2) and a composite membrane structure (3), wherein the positive electrode membrane structure (1) and the negative electrode membrane structure (2) are symmetrically arranged, and the positive electrode membrane and the negative electrode membrane formed by the positive electrode membrane structure (1) and the negative electrode membrane structure (2) are combined with the composite membrane structure (3) to form an electrode sheet (4), characterized in that: The positive electrode membrane mechanism (1) and the negative electrode membrane mechanism (2) both include a spiral feeding assembly (5), a casting roller (6), a plurality of calendering rollers (7) and a composite roller (8) which are sequentially arranged along the belt running direction. Both ends of the casting roller (6), the plurality of calendering rollers (7) and the composite roller (8) are rotatably connected to the frame via a bearing seat (9). The rotation directions of the casting roller (6) and the calendering roller (7), two adjacent calendering rollers (7) and the calendering roller (7) and the composite roller (8) are opposite, and the gap between the two decreases sequentially along the belt running direction. The rotation speeds of the casting roller (6), the calendering roller (7) and the composite roller (8) increase sequentially along the belt running direction. A slit for the current collector (10) in the composite membrane mechanism (3) to pass through is formed between the two composite rollers (8).

2. The dry film forming and rolling composite electrode equipment according to claim 1, characterized in that: The spiral feeding assembly (5) comprises a mixing tube (51), a spiral rod (52) and an extrusion die head (53); a feed port is provided at the top of one end of the mixing tube (51), and a discharge port is provided at the end of the other end; the feed port is communicated with a silo (54), and the discharge port is communicated with the extrusion die head (53); the spiral rod (52) is rotatably installed in the mixing tube (51), and the lip of the extrusion die head (53) is communicated with a casting roller (6).

3. The dry film forming and rolling composite electrode equipment according to claim 2, characterized in that: An adjusting mechanism for adjusting the local opening of the lip is installed inside the lip of the extrusion die head (53).

4. A dry film forming and rolling composite electrode equipment according to any one of claims 1 to 3, characterized in that: A gap adjustment mechanism is provided between two adjacent bearing seats (9), and the gap adjustment mechanism comprises a servo motor (11), a screw rod (12) and two limit wedges (13). The servo motor (11) is fixedly mounted on one of the bearing seats (9) through a support frame (14). The inclined surfaces of the two limit wedges (13) that are close to each other are in contact with each other, and the straight surfaces that are far away from each other are respectively in contact with the two bearing seats (9). One of the limit wedges (13) is fixedly connected to the bearing seat (9), and the other limit wedge (13) is slidably connected along the inclined surface direction, and a threaded hole is opened on the top of the limit wedge. One end of the screw rod (12) is fixedly connected to the output shaft of the servo motor, and the other end is threadedly screwed with the threaded hole.

5. The dry film forming and rolling composite electrode equipment according to claim 4, characterized in that: The casting roller (6), the calendering roller (7) and the composite roller (8) are all provided with temperature control components.

6. The dry film forming and rolling composite electrode equipment according to claim 1, characterized in that: The composite membrane mechanism (3) comprises a substrate unwinding wheel (31), an upper tensioning wheel group (32), a preheating assembly (33), a lower tensioning wheel group (34) and a pole piece winding wheel (35) which are arranged in sequence along the belt running direction; the substrate unwinding wheel (31), the upper tensioning wheel group (32) and the preheating assembly (33) are located above the positive electrode membrane mechanism (1) and the negative electrode membrane mechanism (2); the lower tensioning wheel group (34) and the pole piece winding wheel (35) are located below the positive electrode membrane mechanism (1) and the negative electrode membrane mechanism (2); the current collector (10) wound on the substrate unwinding wheel (31) passes through the upper tensioning wheel group (32) and the preheating assembly (33) and then passes through the slit to be combined with the positive electrode membrane and the negative electrode membrane to form an electrode sheet (4); the electrode sheet (4) passes through the lower tensioning wheel group (34) and is connected to the pole piece winding wheel (35).

7. The dry film forming and rolling composite electrode equipment according to claim 6, characterized in that: The composite diaphragm mechanism (3) further comprises a thickness detection component (36), wherein the thickness detection component (36) is installed between the lower tensioning wheel group (34) and the slit and is located directly below the slit.

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