Pole piece manufacturing device and battery production line

Abstract

The utility model discloses a pole piece manufacturing device and a battery production line, the pole piece manufacturing device comprises a rolling assembly, a conveying roller body, a cutting assembly and a composite roller body, the rolling assembly is configured to roll electrode powder to form an electrode film; the conveying roller body is configured to convey an electrode film, the cutting assembly is matched with the conveying roller body, the cutting assembly is configured to cut the electrode film into a preset length, the compounding roller body is matched with the conveying roller body, and the compounding roller body and the conveying roller body are configured to compound the electrode film with the preset length with a current collector. According to the scheme provided by the invention, when the electrode film is conveyed between the conveying roller body and the cutting assembly, the cutting assembly cuts the electrode film, so that the electrode film is cut into a plurality of sections with the same size. And then each section is compounded with the current collector between the conveying roller body and the composite roller body in a rolling manner, so that the preparation of the gap pole piece can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to an electrode tab manufacturing device and a battery production line. BACKGROUND

[0002] In the production process of a battery, an electrode is a core part of the battery, and the production process of the electrode is usually divided into a solvent wet coating process or a dry coating forming process. Among them, the dry process can inhibit the decomposition of sulfide electrolyte, thereby reducing the loss of sulfide electrolyte ionic conductivity, and has obvious advantages in thick electrode preparation, equipment investment cost, site area, environmental protection, etc., and is favored by more and more battery manufacturers.

[0003] The dry coating forming process equipment in the related art cannot realize the preparation of a gap electrode tab when in use. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides an electrode tab manufacturing device and a battery production line, which can solve the problem that the dry coating forming process equipment cannot realize the preparation of a gap electrode tab when in use.

[0005] To solve the above technical problems, the present application provides an electrode tab manufacturing device, comprising:

[0006] a rolling assembly configured to roll electrode powder into an electrode film;

[0007] a conveying roller body configured to convey the electrode film;

[0008] a cutting assembly cooperating with the conveying roller body, the cutting assembly being configured to cut the electrode film into a predetermined length;

[0009] a composite roller body cooperating with the conveying roller body, the composite roller body and the conveying roller body being configured to composite the electrode film of the predetermined length with a current collector.

[0010] In the technical scheme of the present application, when the electrode film is conveyed between the conveying roller body and the cutting assembly, the cutting assembly cuts the electrode film to cut the electrode film into multiple segments of the same size. Then each segment is rolled and composited with the current collector between the conveying roller body and the composite roller body, so that the preparation of a gap electrode tab can be realized.

[0011] In some embodiments, the rolling assembly comprises a first roller body and a second roller body arranged oppositely, and the gap between the first roller body and the second roller body is adjustable;

[0012] The electrode powder is rolled into the electrode film through the gap between the first roller body and the second roller body. In this way, by adjusting the gap between the first roller body and the second roller body, electrode films of different thicknesses can be rolled.

[0013] In some embodiments, the rolling assembly further comprises at least one set of thinning roller groups arranged downstream of the second roller body, and the thinning roller groups are configured to thin the electrode film rolled by the first roller body and the second roller body step by step. In this way, the corresponding electrode film can be further thinned by the thinning roller groups.

[0014] In some embodiments, the thinning roller groups comprise two oppositely arranged thinning rollers, and the gap between the two thinning rollers is smaller than the gap between the first roller body and the second roller body.

[0015] In some embodiments, the gap between the two thinning rollers is adjustable. In this way, by adjusting the gap between the two thinning rollers, electrode films of corresponding thicknesses can be rolled.

[0016] In some embodiments, the rolling assembly further comprises a heating element embedded in the first roller body and / or the second roller body.

[0017] In this way, by heating the first roller body and the second roller body, the temperature of the electrode powder during the rolling process can be maintained at a specified temperature, which is conducive to the formation of the electrode film.

[0018] In some embodiments, the rolling assembly further comprises a detection element arranged inside the first roller body and the second roller body, the detection element is electrically connected with the heating element, and the detection element is configured to detect the temperature of the first roller body and the second roller body.

[0019] In this way, by detecting the temperature of the corresponding first roller body and second roller body through the detection element, when the temperature is lower than or exceeds the set value, the heating element adjusts the corresponding heating temperature, so that the temperature of the first roller body and the second roller body is within the set value.

[0020] In some embodiments, the cutting assembly is a cutting roller which is tangent to the conveying roller body, and the cutting roller is provided with a cutting opening, and the opening size of the cutting opening is adjustable. In this way, by adjusting the size of the cutting opening, the length of each segment of the cut electrode film can be adjusted.

[0021] In some embodiments, the cutting assembly further comprises at least one connecting piece detachably connected to the cutting slot, the connecting piece being configured to define the opening size of the cutting slot. In this way, the opening size of the cutting slot can be conveniently adjusted by detaching or mounting the corresponding connecting piece.

[0022] In some embodiments, the gap between the cutting roller and the conveying roller body is adjustable. In this way, the distance between the corresponding cutting roller and the conveying roller body can be conveniently adjusted according to actual needs, avoiding the collision between the cutting roller and the conveying roller body when cutting the electrode film.

[0023] In some embodiments, the gap between the conveying roller body and the composite roller body is adjustable. In this way, by adjusting the distance between the conveying roller body and the composite roller body, the current collector with different thicknesses can be adapted.

[0024] In some embodiments, the roller surfaces of the roller pressing assembly, the conveying roller body, the cutting assembly, and the composite roller body are all smooth and wear-resistant. In this way, the continuous production efficiency of the electrode sheet can be greatly improved, and the equipment maintenance cost can be reduced without frequent downtime to clean the powder adhered to the roller surface and without frequent replacement of the worn roller body. Moreover, since the overall roller surface is smooth, the yield of the electrode sheet product can be improved, and the electrode sheet can be avoided from being scrapped due to defects.

[0025] In some embodiments, the electrode sheet manufacturing device further comprises a recycling component cooperating with the cutting assembly and being configured to recycle the cut electrode film. In this way, the cut electrode film can be conveniently recycled.

[0026] In some embodiments, the electrode sheet manufacturing device further comprises a blowing component configured to separate the cut electrode film from the cutting assembly. In this way, the cut electrode film on the cutting assembly can be conveniently blown off.

[0027] In some embodiments, the air outlet pressure of the blowing component is adjustable. In this way, the corresponding air outlet pressure can be adjusted according to actual conditions, so that the corresponding electrode film can be effectively blown off.

[0028] The present application also proposes a battery production line comprising the electrode sheet manufacturing device according to any one of the embodiments of the present application.

[0029] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the following specific embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the implementation. The accompanying drawings are included to provide a description of the implementation and are not intended to limit the application. Moreover, in the drawings, like reference numerals denote like parts throughout the several views. In the drawings:

[0031] Figure 1 A schematic view of a pole piece manufacturing device provided for some embodiments of the present application;

[0032] Figure 2 A partial enlarged schematic view of a cutting roller provided for some embodiments of the present application;

[0033] Figure 3 A schematic view of a pole piece provided for some embodiments of the present application;

[0034] Figure 4 A further schematic view of a pole piece provided for some embodiments of the present application.

[0035] Reference signs in the detailed description of the implementation are as follows:

[0036] 10, electrode powder; 11, electrode film; 12, current collector; 13, roller pressing assembly; 131, first roller body; 132, second roller body; 14, conveying roller body; 15, cutting assembly; 151, cutting opening; 16, composite roller body; 17, connecting sheet. Detailed description of the implementation

[0037] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0040] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0041] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which can represent three relationships, for example, A and / or B, which can represent three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character“ / ” herein generally represents an“or” relationship between the front and rear associated objects.

[0042] In the description of the embodiments of the application, the term“a plurality of” refers to two or more (including two), and similarly, “a plurality of groups” refers to two or more groups (including two groups), and “a plurality of pieces” refers to two or more pieces (including two pieces).

[0043] In the description of the embodiments of the application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise”,“axial”,“radial”,“circumferential” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the application.

[0044] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0045] With the popularity of electric vehicles and energy storage systems, the energy density of lithium ion batteries is continuously improved, but the safety hazard caused by the flammability of liquid electrolyte is increasingly prominent. Frequent battery fire accidents have caused huge economic losses, and battery safety design is particularly important. All-solid-state batteries use non-combustible solid electrolyte to eliminate the risk of volatility and explosion from the source, becoming a key technology to break through the safety bottleneck.

[0046] The electrode belongs to the core part of the battery, and the production process of the electrode is usually divided into a solvent wet coating process or a dry coating forming process. Among them, the dry process can inhibit the decomposition of sulfide electrolyte, thereby reducing the ion conductivity loss of sulfide electrolyte, and has obvious advantages in thick electrode preparation, equipment investment cost, site area, environmental protection and the like, and is favored by more and more battery manufacturers.

[0047] The dry coating forming process is to mix active material, conductive agent, binder, electrolyte and the like in a dry powder state, then roll the powdery mixture into an electrode film with a certain thickness through a calender, and then hot-press the electrode film with a certain thickness and the substrate together to form the electrode sheet of the battery.

[0048] The current preparation of the dry electrode is mainly realized by a multi-roll continuous rolling composite integrated machine. The mixed powder prepared by dry mixing is discharged between the first and second rolls of the rolling mechanism. Under the cooperation and adjustment of certain pressure, temperature, gap and roll speed, the electrode film sheet is transferred with the second roll. Subsequently, by adjusting the above parameters, the electrode film sheet sequentially passes through the third, fourth, and the like multi-stage rolling mechanism, so as to realize the gradual thinning of the weight (thickness) of the electrode film sheet, until the target weight (thickness) is obtained. At this time, the target weight (thickness) electrode film sheet and the substrate (coated carbon aluminum foil & copper foil) are hot-pressed to make the electrode film sheet and the substrate firmly adhere together, so as to obtain an electrode sheet with good mechanical properties.

[0049] The dry coating forming process equipment in the related art needs to keep uninterrupted continuous feeding from the beginning of the mixed powder falling between the two rolls, so as to obtain the continuously transferred electrode film sheet. The electrode film sheet continuously and continuously composites with the substrate through the multi-stage rolling mechanism, so as to realize the preparation of the continuous electrode sheet with good appearance, regular shape, qualified size and controllable weight. The electrode film is continuously maintained throughout the process without breakpoints, so the preparation of the gap electrode sheet cannot be realized.

[0050] Based on the above consideration, in order to solve the problem that the dry coating forming process equipment cannot realize the preparation of the gap electrode sheet during use, the present application provides an electrode sheet manufacturing device. The electrode sheet manufacturing device includes a rolling assembly, a conveying roller body, a cutting assembly and a composite roller body. The rolling assembly is configured to roll the electrode powder into an electrode film; the conveying roller body is configured to convey the electrode film; the cutting assembly cooperates with the conveying roller body, and the cutting assembly is configured to cut the electrode film into a predetermined length; the composite roller body cooperates with the conveying roller body, and the composite roller body and the conveying roller body are configured to composite the electrode film with a predetermined length and a current collector.

[0051] In the technical solution of the embodiment of the present application, when the electrode film is conveyed between the conveying roller body and the cutting assembly, the cutting assembly cuts the electrode film, so as to cut the electrode film into multiple segments of the same size. Then, each segment is roll-composed with the current collector roller between the conveying roller body and the composite roller body, so that the preparation of the gap pole piece can be realized.

[0052] According to some embodiments of the present application, as shown in Figure 1 The present application provides a pole piece manufacturing device, which comprises a roll-composition assembly 13, a conveying roller body 14, a cutting assembly 15 and a composite roller body 16. The roll-composition assembly 13 is configured to roll-compose the electrode powder 10 into an electrode film 11. The conveying roller body 14 is configured to convey the electrode film 11. The cutting assembly 15 cooperates with the conveying roller body 14, and is configured to cut the electrode film 11 into a predetermined length. The composite roller body 16 cooperates with the conveying roller body 14, and the conveying roller body 14 and the composite roller body 16 are configured to roll-compose the electrode film 11 of the predetermined length with a current collector 12.

[0053] The roll-composition assembly 13 in the embodiment can comprise two, three or the like roller bodies, which can be determined according to actual conditions, and the embodiment of the present application does not limit this.

[0054] In the embodiment, the cutting assembly 15 can comprise a cutting roller and a motor, the motor being connected with the cutting roller and used to drive the cutting roller to rotate. Meanwhile, the cutting roller is provided with a cutting notch, and when the motor drives the cutting roller to rotate, the corresponding cutting notch cuts the electrode film 11 on the conveying roller body 14.

[0055] Referring to Figure 1 As shown in the figure, after the electrode powder 10 is roll-composed into the electrode film 11 by the roll-composition assembly 13, the electrode film 11 is cut into segments of electrode film 11 by the cutting assembly 15 located on the conveying roller body 14 during the conveying process of the electrode film 11 on the conveying roller body 14. At this time, the electrode film 11 is roll-composed with the current collector 12 between the conveying roller body 14 and the composite roller body 16 to form a pole piece.

[0056] As shown in the figure, the roll-composed pole piece structure can be a single-face pole piece, which can comprise a lower current collector, an intermediate gap bottom coating layer and an upper gap electrode film layer; or the single-face pole piece can comprise a lower current collector, an intermediate continuous bottom coating layer and an upper gap electrode film layer. Figure 3 As shown in the figure, the roll-composed pole piece structure can be a single-face pole piece, which can comprise a lower current collector, an intermediate gap bottom coating layer and an upper gap electrode film layer; or the single-face pole piece can comprise a lower current collector, an intermediate continuous bottom coating layer and an upper gap electrode film layer.

[0057] As shown in the figure, the roll-composed pole piece structure can be a single-face pole piece, which can comprise a lower current collector, an intermediate gap bottom coating layer and an upper gap electrode film layer; or the single-face pole piece can comprise a lower current collector, an intermediate continuous bottom coating layer and an upper gap electrode film layer. Figure 4 As shown in the figure, the roll-composed pole piece structure can be a single-face pole piece, which can comprise a lower current collector, an intermediate gap bottom coating layer and an upper gap electrode film layer; or the single-face pole piece can comprise a lower current collector, an intermediate continuous bottom coating layer and an upper gap electrode film layer.

[0058] In the case of stable speed operation, the electrode film 11 is compounded at a constant speed. Since the cutting assembly 15 cuts part of the electrode film 11, the electrode film 11 is compounded at a constant speed and the current collector 12, and a constant-distance electrode sheet is formed with a distance equal to the cut part. Thus, the dry continuous gap electrode sheet is prepared.

[0059] According to some embodiments of the present application, as shown in Figure 1 The roller assembly 13 includes oppositely arranged first and second roller bodies 131 and 132, and the gap between the first and second roller bodies 131 and 132 is adjustable. The electrode powder 10 is rolled between the first and second roller bodies 131 and 132 to form the electrode film 11.

[0060] The roller assembly 13 in the present embodiment can also include a third roller body, a fourth roller body, etc., which are not limited herein.

[0061] In the present embodiment, the first and second roller bodies 131 and 132 are connected to the rack by bolts. In use, the installation positions of the first and second roller bodies 131 and 132 on the rack are adjusted to correspondingly adjust the gap between the first and second roller bodies 131 and 132.

[0062] In this way, the electrode film 11 with different thicknesses can be rolled according to requirements when the electrode powder 10 passes between the first and second roller bodies 131 and 132.

[0063] According to some embodiments of the present application, the roller assembly 13 further includes at least one set of thinning roller groups, which are arranged downstream of the second roller body 132. The thinning roller groups are configured to thin the electrode film 11 that has been preliminarily rolled by the first and second roller bodies 131 and 132.

[0064] The roller assembly 13 in the present embodiment can include one or two sets of thinning roller groups, which can be determined according to actual conditions, and the present specification does not limit this.

[0065] When the electrode powder 10 is rolled between the first and second roller bodies 131 and 132 to form the electrode film 11, the electrode film 11 is further rolled and thinned by the corresponding thinning roller groups.

[0066] According to some embodiments of the present application, the thinning roller groups include oppositely arranged two thinning rollers, and the gap between the two thinning rollers is smaller than the gap between the first and second roller bodies 131 and 132.

[0067] In the embodiment, the two thinning rollers can be bolted on the rack, and the gap between the two thinning rollers is smaller than the gap between the first roller body 131 and the second roller body 132, so that the electrode film 11 formed by roll forming can be further thinned after passing through the corresponding two thinning rollers.

[0068] According to some embodiments of the present application, the gap between the two thinning rollers is adjustable.

[0069] In the embodiment, the two thinning rollers can be bolted on the rack. In use, the installation positions of the two thinning rollers on the rack are adjusted to correspondingly adjust the gap between the two thinning rollers.

[0070] According to some embodiments of the present application, the roll forming assembly 13 further comprises a heating member, which is embedded in the first roller body 131 and / or the second roller body 132.

[0071] The heating member in the embodiment can be a heating wire, which is not limited herein.

[0072] In use, the first roller body 131 and the second roller body 132 are heated by the heating member, so that the temperature of the electrode powder in the roll forming process is maintained at a specified temperature, which is beneficial to the electrode film forming.

[0073] According to some embodiments of the present application, the roll forming assembly 13 further comprises a detection member, which is arranged in the interior of the first roller body 131 and the second roller body 132, and is electrically connected with the heating member. The detection member is configured to detect the temperature of the first roller body 131 and the second roller body 132.

[0074] The detection member in the embodiment can be a temperature sensor, which is not limited herein.

[0075] In use, the temperature of the first roller body 131 and the second roller body 132 is detected by the temperature sensor. When the temperature is lower than or exceeds a set value, the temperature sensor sends a detected signal to the heating member, and the heating member adjusts the corresponding heating temperature, so that the temperature of the first roller body 131 and the second roller body 132 is within the set value.

[0076] According to some embodiments of the present application, as shown in Figure 1 and in combination with Figure 2 It is shown that the cutting assembly 15 is a cutting roller which is tangent to the conveying roller body 14. The cutting roller is provided with a cutting port 151, and the opening size of the cutting port 151 is adjustable.

[0077] In the embodiment, the cutting roller is connected to the rack by a motor. The cutting port 151 is arranged on the circumferential surface of the cutting roller in the axial direction. At least one connecting piece is bolted in the cutting port 151. By increasing or decreasing the number of connecting pieces, the opening size of the corresponding cutting port 151 can be adjusted.

[0078] In the embodiment, the cutting roller is tangent to the lower conveying roller body 14, when the electrode film 11 is transferred to the cutting roller and the conveying roller body 14, the speed of the cutting roller is adjusted by the motor, and the cutting roller is cut to form a cutting surface when the cutting opening 151 is in contact with the electrode film 11, so that the electrode film pieces with a fixed opening interval size are cut off, and then the gap electrode film pieces are obtained.

[0079] When the cutting roller rotates for the second time, the cutting opening 151 is again in contact with the electrode film 11, and the cutting roller forms a cutting surface. In the subsequent continuous tape running process, the cutting roller cuts the electrode film pieces according to the path of each circle, and the electrode film with a fixed length required for the electrode piece compounding in the running direction is formed. Each piece of the electrode film with a fixed length is finally formed by rolling the current collector 12 between the conveying roller body 14 and the compounding roller body 16.

[0080] In use, the length of each piece of the electrode film after cutting can be adjusted by adjusting the size of the cutting opening 151.

[0081] It should be noted that the structure of the cutting assembly described above is only an example, and other structures can also be used in alternative schemes, for example, the cutting assembly is a laser cutting machine, etc. The specific structure of the cutting assembly is not specially limited in the present application, as long as the structure described above can achieve the purpose of the present application.

[0082] According to some embodiments of the present application, as shown in Figure 2 The cutting assembly 15 further includes at least one connecting piece 17, which is detachably connected to the cutting opening 151, and the connecting piece 17 is configured to limit the opening size of the cutting opening 151.

[0083] The cutting assembly 15 in the embodiment can include one, two, etc. connecting pieces 17, which are not limited here.

[0084] Referring to Figure 2 The connecting piece 17 can be connected in the cutting opening 151 by bolts, so that the opening size of the cutting opening 151 around the circumference can be changed.

[0085] In use, by detaching or installing the corresponding connecting piece 17, the opening size of the cutting opening 151 can be conveniently adjusted to cut the electrode film with a suitable length.

[0086] According to some embodiments of the present application, the gap between the cutting roller and the conveying roller body 14 is adjustable.

[0087] The cutting roller and the conveying roller body 14 in the embodiment are bolted on the rack, and the gap between the cutting roller and the conveying roller body 14 can be adjusted by adjusting the positions of the cutting roller and the conveying roller body 14 on the rack.

[0088] In use, the positions of the cutting roller and the conveying roller body 14 on the rack are adjusted so that the cutting roller is tangent to the conveying roller body 14, so that the cutting port 151 on the cutting roller can cut off part of the electrode film under the action of the roller pressure when the electrode film 11 passes between the cutting roller and the conveying roller body 14.

[0089] According to some embodiments of the present application, the gap between the conveying roller body 14 and the composite roller body 16 is adjustable.

[0090] The conveying roller body 14 and the composite roller body 16 in the embodiment are bolted on the rack, and the gap between the conveying roller body 14 and the composite roller body 16 can be adjusted by adjusting the positions of the conveying roller body 14 and the composite roller body 16 on the rack.

[0091] In use, the gap between the conveying roller body 14 and the composite roller body 16 can be adjusted to adapt to current collectors of different thicknesses.

[0092] According to some embodiments of the present application, the roller surfaces of the roller pressing assembly 13, the conveying roller body 14, the cutting assembly 15, and the composite roller body 16 are smooth and wear-resistant.

[0093] For the roller surfaces of the first roller body 131 and the second roller body 132 in the roller pressing assembly 13, the smooth roller surfaces can prevent electrode powder from adhering to the roller surfaces during the process of rolling into a film, prevent the electrode film surface from having material defects, scratches, and wrinkles, and ensure the thickness uniformity and surface flatness of the electrode film; the wear-resistant roller surfaces can resist the wear of hard particles in the electrode powder, prolong the service life of the roller bodies, and prevent the electrode film thickness from deviating due to the wear of the roller surfaces.

[0094] For the conveying roller body 14, the smooth roller surface can smoothly convey the electrode film / the cut electrode film segment against the roller surface without jamming or scratching, will not cause the edge of the electrode film to be damaged or torn due to the roughness of the roller surface, and can prevent the powder layer of the electrode film from falling off, thereby ensuring the integrity of the electrode film; the wear-resistant property is suitable for long-time conveying in continuous production and will not cause the roller surface to be concave-convex due to wear, thereby ensuring the stability of the conveying track.

[0095] For the cutting roller, the smooth roller surface can prevent the cut electrode film segment from adhering to the roller surface of the cutting roller, and in combination with the blowing effect of the blowing component, can further improve the separation efficiency of the electrode film and the cutting roller, reduce cutting misplacement and film segment deviation caused by adhesion; the wear-resistant roller surface can protect the roller surface matrix of the cutting roller, prevent wear when the cutting port contacts the roller surface, prevent electrode film powder from adhering to the roller surface to form accumulated material, and ensure cutting precision.

[0096] For the composite roller body 16, the smooth roller surface can make the electrode film segment closely adhere to the current collector and uniformly press when cooperating with the conveying roller body 14 for pressing, so that no indentation of the roller surface pattern is formed on the surface of the electrode sheet, the surface quality of the electrode sheet is ensured, and the problems of large electrode sheet internal resistance and electrode sheet cracking caused by indentation are avoided; the wear-resistant roller surface can resist the friction and wear of the current collector (metal foil), and at the same time avoid the wear of the electrode film powder during compounding, so as to ensure the stability of the pressing gap.

[0097] In this way, the continuous production efficiency of the electrode sheet manufacturing is greatly improved, and the equipment maintenance cost is reduced without frequent shutdown to clean the powder adhered to the roller surface and without frequent replacement of the worn roller body. Moreover, since the overall roller surface is smooth, the yield of the electrode sheet product can be improved, and the electrode sheet caused by defects is avoided.

[0098] According to some embodiments of the present application, the electrode sheet manufacturing device further comprises a recycling component configured to recycle the cut electrode film 11 in cooperation with the cutting assembly 15.

[0099] The recycling component in the embodiment can be a recycling box for recycling the cut electrode film.

[0100] According to some embodiments of the present application, the electrode sheet manufacturing device further comprises a blowing component configured to separate the cut electrode film from the cutting assembly 15.

[0101] The blowing component in the embodiment can be a fan, a blower, etc., which is not limited here.

[0102] In use, the blowing port of the blowing component faces the cutting roller, and after the cutting port 151 on the cutting roller cuts the corresponding electrode film, the blowing component blows the corresponding electrode film out of the cutting port 151, so as to avoid the cut electrode film adhering to the cutting port 151 and affecting subsequent cutting.

[0103] According to some embodiments of the present application, the air outlet pressure of the blowing component is adjustable.

[0104] In the embodiment, a pressure regulating valve, a throttle valve, etc. can be arranged on the air outlet of the blowing component, such as a gas pump, so as to change the air outlet pressure by adjusting the size of the corresponding air port.

[0105] When the air outlet pressure is increased: the air inlet supply pressure can be increased, at this time, the gas pressure of the air outlet of the blowing component is increased, the airflow velocity is accelerated, and the blown airflow has greater impact force; when the air outlet pressure is decreased: the air inlet supply pressure can be decreased, at this time, the gas pressure of the air outlet of the blowing component is decreased, the airflow velocity is slowed down, and the impact force of the blown airflow is weakened.

[0106] The whole pressure regulating process is real-time adjustable, does not need to stop, can be adjusted on site according to production needs, the air outlet pressure is stable after pressure regulation, there is no airflow fluctuation, and the conveying stability of the electrode film is not affected.

[0107] The application also provides a battery production line comprising the electrode tab manufacturing device according to any one of the embodiments.

[0108] The specific structure of the electrode tab manufacturing device in the embodiment is referred to the above embodiments, since all the technical solutions of the above embodiments are adopted in the battery production line, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and thus the detailed description is not repeated here.

[0109] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application, and they should be covered in the scope of the claims and the description of the application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electrode manufacturing apparatus, characterized in that, include: A roll forming assembly is configured to roll electrode powder to form an electrode film. A conveying roller is configured to convey the electrode film; A cutting assembly that cooperates with the conveying roller and is configured to cut the electrode film into a predetermined length; A composite roller body, which cooperates with the conveying roller body, and the composite roller body and the conveying roller body are configured to combine the electrode film of a predetermined length with the current collector.

2. The electrode manufacturing apparatus according to claim 1, characterized in that, The rolling assembly includes a first roller and a second roller disposed opposite to each other, and the gap between the first roller and the second roller is adjustable; The electrode powder is rolled into the electrode film through the gap between the first roller and the second roller.

3. The electrode manufacturing apparatus according to claim 2, characterized in that, The rolling assembly further includes at least one set of thinning rollers, which are disposed downstream of the second roller and are configured to progressively thin the electrode film after it has been initially rolled by the first and second rollers.

4. The electrode manufacturing apparatus according to claim 3, characterized in that, The thinning roller assembly includes two thinning rollers arranged opposite each other, and the gap between the two thinning rollers is smaller than the gap between the first roller body and the second roller body.

5. The electrode manufacturing apparatus according to claim 4, characterized in that, The gap between the two thinning rollers is adjustable.

6. The electrode manufacturing apparatus according to any one of claims 2 to 5, characterized in that, The rolling assembly further includes a heating element, which is embedded inside the first roller body and / or the second roller body.

7. The electrode manufacturing apparatus according to claim 6, characterized in that, The rolling assembly further includes a detection element disposed inside the first roller body and the second roller body. The detection element is electrically connected to the heating element and is configured to detect the temperature of the first roller body and the second roller body.

8. The electrode manufacturing apparatus according to claim 1, characterized in that, The cutting component is a cutting roller, which is tangent to the conveying roller body. The cutting roller is provided with a cutting opening, and the size of the cutting opening is adjustable.

9. The electrode manufacturing apparatus according to claim 8, characterized in that, The cutting assembly further includes at least one connecting piece detachably connected to the cutting opening, the connecting piece being configured to define the opening size of the cutting opening.

10. The electrode manufacturing apparatus according to claim 8, characterized in that, The gap between the cutting roller and the conveying roller is adjustable.

11. The electrode manufacturing apparatus according to claim 1, characterized in that, The gap between the conveying roller and the composite roller is adjustable.

12. The electrode manufacturing apparatus according to any one of claims 1 to 5, characterized in that, The roller surfaces of the roller pressing assembly, the conveying roller, the cutting assembly, and the composite roller are all smooth and wear-resistant.

13. The electrode manufacturing apparatus according to any one of claims 1 to 5, characterized in that, The electrode manufacturing apparatus further includes a recycling component, which cooperates with the cutting assembly and is configured to recycle the cut electrode film.

14. The electrode manufacturing apparatus according to claim 13, characterized in that, The electrode manufacturing apparatus further includes a blowing component configured to separate the cut electrode film from the cutting assembly.

15. The electrode manufacturing apparatus according to claim 14, characterized in that, The air pressure of the blower component is adjustable.

16. A battery production line, characterized in that, Includes the electrode manufacturing apparatus as described in any one of claims 1 to 15.

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