Dry process electrode production equipment

Abstract

The utility model provides a dry process electrode production equipment, which relates to the field of battery manufacturing technology. The dry process electrode production equipment includes a first feeding device, a first shaping roller group, a second feeding device, a second shaping roller group, a foil unwinding device and a composite winding device. The first shaping roller group is arranged downstream of the first feeding device; the second feeding device is spaced apart from the first feeding device; the second shaping roller group is arranged downstream of the second feeding device; the foil unwinding device is arranged between the first feeding device and the second feeding device; the composite device is arranged downstream of the first shaping roller group, the second shaping roller group and the foil unwinding device. Compared with the prior art, the utility model can solve the problems of uneven thickness, poor mechanical strength and easy breakage of dry coating membranes, and the membrane and the foil are composited at one time, which simplifies the process and improves the equipment efficiency. Second membrane.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and in particular to a dry process pole piece production device. Background Art

[0002] At present, lithium battery pole pieces are mainly produced using a wet process. The basic process is: apply the evenly mixed positive electrode (or negative electrode) slurry on the current collector and then dry it to form it. This process has the following disadvantages: 1. High drying energy consumption and large equipment footprint; 2. High cost and environmental pollution; 3. Electrode stratification; 4. Limited electrode thickness; 5. Not suitable for all-solid-state batteries, etc.

[0003] The current dry coating membrane coats the positive or negative electrode material on the foil, which will result in uneven membrane thickness. At the same time, the strength is only provided by the foil, making the membrane easy to break. At the same time, the coating process is complicated and multiple composites are required during the composite process, which is complicated and inefficient. Utility Model Content

[0004] The utility model aims to provide a dry process electrode production equipment, which can solve the problems of uneven thickness, poor mechanical strength and easy breakage of dry coating membranes, and the membrane and foil are compounded at one time, which simplifies the process and improves the equipment efficiency.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a dry process electrode production device, comprising:

[0007] a first feeding device, the first feeding device being used to provide a first electrode powder and press the first electrode powder to form a first membrane;

[0008] a first shaping roller group, the first shaping roller group being arranged downstream of the first feeding device and used for rolling the first film sheet to a first target thickness;

[0009] a second feeding device, the second feeding device being spaced apart from the first feeding device and being used for providing a second electrode powder and pressing the second electrode powder to form a second membrane;

[0010] a second shaping roller group, the second shaping roller group being arranged downstream of the second feeding device and used for rolling the second film sheet to a second target thickness;

[0011] A foil unwinding device, the foil unwinding device is arranged between the first feeding device and the second feeding device, and is used to provide foil;

[0012] A composite winding device is arranged downstream of the first shaping roller group, the second shaping roller group and the foil unwinding device, and is used to composite the first diaphragm, the foil and the second diaphragm to form a composite pole piece and wind it up.

[0013] In an optional embodiment, the first feeding device includes a first storage tank, a first feeding assembly, a first synchronous conveyor belt and a first diaphragm forming roller group, the first storage tank is used to store the first electrode powder, one end of the first feeding assembly is connected to the discharge port of the first storage tank, and the other end is connected to the first synchronous conveyor belt, which is used to uniformly transport the first electrode powder to the first synchronous conveyor belt, and the first diaphragm forming roller group is arranged at one end of the first synchronous conveyor belt away from the first feeding assembly, which is used to press the first electrode powder to form a first diaphragm.

[0014] In an optional embodiment, the first feeding assembly includes a first screw feeder and a first vibrating feeder connected end to end, one end of the first screw feeder is connected to the discharge port of the first storage tank, and the other end extends to the first vibrating feeder for spiral feeding to the first vibrating feeder, and the first vibrating feeder is connected to the first synchronous conveyor belt for vibrating feeding to the first synchronous conveyor belt.

[0015] In an optional embodiment, the first film forming roller group is arranged on the upper side of the first synchronous conveyor belt, and a first separation scraper is also arranged on the lower side of the first synchronous conveyor belt. The first separation scraper extends to one end of the first synchronous conveyor belt away from the first feeding assembly, and is used to peel off the formed first film from the first synchronous conveyor belt.

[0016] In an optional embodiment, the second feeding device includes a second storage tank, a second feeding assembly, a second synchronous conveyor belt and a second film forming roller group, the second storage tank is used to store second electrode powder, one end of the second feeding assembly is connected to the discharge port of the second storage tank, and the other end is connected to the second synchronous conveyor belt, which is used to uniformly transport the second electrode powder to the second synchronous conveyor belt, and the second film forming roller group is arranged at one end of the second synchronous conveyor belt away from the second feeding assembly, which is used to press the second electrode powder to form a second film.

[0017] In an optional embodiment, the second feeding assembly includes a second screw feeder and a second vibrating feeder connected end to end, one end of the second screw feeder is connected to the discharge port of the second storage tank, and the other end extends to the second vibrating feeder for spiral feeding to the second vibrating feeder, and the second vibrating feeder is connected to the second synchronous conveyor belt for vibrating feeding to the second synchronous conveyor belt.

[0018] In an optional embodiment, the second film forming roller group is arranged on the upper side of the second synchronous conveyor belt, and a second separation scraper is also arranged on the lower side of the second synchronous conveyor belt. The second separation scraper extends to one end of the second synchronous conveyor belt away from the second feeding assembly, and is used to peel off the formed second film from the second synchronous conveyor belt.

[0019] In an optional embodiment, a first film trimming roller group is further arranged between the first shaping roller group and the composite winding device, and the first film trimming roller group is used to trim the first film; a second film trimming roller group is further arranged between the second shaping roller group and the composite winding device, and the second film trimming roller group is used to trim the second film.

[0020] In an optional embodiment, a first film trimming roller group and a first thickness detection mechanism are sequentially arranged between the first shaping roller group and the composite winding device, the first film trimming roller group is used to trim the first film, and the first thickness detection mechanism is used to detect the thickness of the first film; a second film trimming roller group and a second thickness detection mechanism are sequentially arranged between the second shaping roller group and the composite winding device, the second film trimming roller group is used to trim the second film, and the second thickness detection mechanism is used to detect the thickness of the second film.

[0021] In an optional embodiment, a composite deviation correction component is provided between the first thickness detection mechanism and the composite winding device, between the second thickness detection mechanism and the composite winding device, and between the foil unwinding device and the composite winding device.

[0022] The beneficial effects of the embodiments of the utility model include:

[0023] The dry process electrode production equipment provided by the embodiment of the utility model uses a first feeding device to provide a first electrode powder, and presses the first electrode powder into a first film, and the first shaping roller group rolls the first film to a first target thickness; at the same time, a second feeding device is used to provide a second electrode powder, and the second electrode powder is pressed into a second film, and the second shaping roller group rolls the second film to a second target thickness; in addition, a foil unwinding device provides foil, and a composite winding device simultaneously composites the first film, the foil, and the second film to form a composite electrode and rolls it. Compared with the prior art, the dry process electrode production equipment provided by the embodiment of the utility model adopts a method of composite with foil after film formation to form an electrode film, which can solve the problems of uneven thickness of dry coating films, poor mechanical strength and easy breakage, and the film and foil are composited at one time, which simplifies the process and improves the efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The overall structure diagram of the dry process electrode production equipment provided by the embodiment of the utility model;

[0026] Figure 2 A partial structural diagram of a dry process electrode production device provided in an embodiment of the utility model;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the composite winding device.

[0028] icon:

[0029] 100-dry process electrode production equipment; 110-first feeding device; 111-first storage tank; 112-first feeding assembly; 1121-first screw feeder; 1123-first vibrating feeder; 113-first synchronous conveyor belt; 114-first film forming roller group; 115-first separation scraper; 116-first film trimming roller group; 117-first thickness detection mechanism; 120-first shaping roller group; 130-second feeding device; 131-second storage tank; 132-second feeding assembly; 1321-second screw Rod feeder; 1323-second vibrating feeder; 133-second synchronous conveyor belt; 134-second film forming roller group; 135-second separation scraper; 136-second film trimming roller group; 137-second thickness detection mechanism; 140-second shaping roller group; 150-foil unwinding device; 151-belt connection platform assembly; 160-compound winding device; 161-compound roller group; 162-third thickness detection mechanism; 163-dust removal mechanism; 164-winding mechanism; 170-compound deviation correction assembly; 180-tension rocker assembly. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Please refer to Figures 1 to 3 This embodiment provides a dry process electrode production equipment 100, which can solve the problems of uneven thickness, poor mechanical strength and easy breakage of dry coating membranes, and the membrane and foil are compounded at one time, which simplifies the process and improves the equipment efficiency.

[0037] The dry process electrode production equipment 100 provided in this embodiment includes a first feeding device 110, a first shaping roller group 120, a second feeding device 130, a second shaping roller group 140, a foil unwinding device 150 and a composite winding device 160. The first feeding device 110 is used to provide a first electrode powder and press the first electrode powder to form a first film; the first shaping roller group 120 is arranged downstream of the first feeding device 110, and is used to roll the first film to a first target thickness; the second feeding device 130 and the first feeding device 110 are connected to each other. 0 is spaced apart, and is used to provide a second electrode powder and press the second electrode powder to form a second diaphragm; the second shaping roller group 140 is arranged downstream of the second feeding device 130, and is used to roll the second diaphragm to a second target thickness; the foil unwinding device 150 is arranged between the first feeding device 110 and the second feeding device 130, and is used to provide foil; the compounding device is arranged downstream of the first shaping roller group 120, the second shaping roller group 140 and the foil unwinding device, and is used to compound the first diaphragm, the foil and the second diaphragm to form a composite electrode sheet and roll it up.

[0038] It should be noted that the first electrode powder and the second electrode powder are both positive electrode powders or both negative electrode powders, so as to form a positive electrode sheet or a negative electrode sheet.

[0039] It should be noted that, in this embodiment, the first feeding device 110, the first shaping roller group 120, the second feeding device 130, the second shaping roller group 140, the foil unwinding device 150 and the composite winding device 160 are all arranged on a large mounting plate, and the "downstream" mentioned in this embodiment refers to the rear end along the electrode conveying direction. The present embodiment adopts a dry process, wherein a first electrode powder is provided by a first feeding device 110, and the first electrode powder is pressed into a preliminary first diaphragm, which is then pressed to a first target thickness by a first shaping roller group 120. Meanwhile, a second electrode powder is provided by a second feeding device 130, and the second electrode powder is pressed into a preliminary second diaphragm, which is then pressed to a second target thickness by a second shaping roller group 140. Finally, a composite winding device 160 is used to composite the foil, the first diaphragm and the second diaphragm together to form a composite electrode sheet and wind it up. The electrode diaphragm is formed by composite with the foil after film formation, which can solve the problems of uneven thickness of dry-coated diaphragms, poor mechanical strength and easy breakage. The diaphragm and the foil are composited at one time, which simplifies the process and improves equipment efficiency.

[0040] The first feeding device 110 includes a first storage tank 111, a first feeding assembly 112, a first synchronous conveyor belt 113 and a first film forming roller group 114. The first storage tank is used to store the first electrode powder. One end of the first feeding assembly 112 is connected to the discharge port of the first storage tank 111, and the other end is connected to the first synchronous conveyor belt 113, which is used to uniformly convey the first electrode powder to the first synchronous conveyor belt 113. The first film forming roller group 114 is arranged at one end of the first synchronous conveyor belt 113 away from the first feeding assembly 112, and is used to press the first electrode powder to form a first film. Specifically, the discharge port of the first storage tank 111 is located at the bottom, the first synchronous conveyor belt 113 is a horizontal conveyor belt, and the first film forming roller group 114 can preliminarily press the first electrode powder on the first synchronous conveyor belt 113 to form a preliminary first film.

[0041] The first feeding assembly 112 includes a first screw feeder 1121 and a first vibrating feeder 1123 connected end to end. One end of the first screw feeder 1121 is connected to the discharge port of the first storage tank 111, and the other end extends to the first vibrating feeder 1123, which is used for spiral feeding to the first vibrating feeder 1123. The first vibrating feeder 1123 is connected to the first synchronous conveyor belt 113, which is used for vibrating and feeding to the first synchronous conveyor belt 113. Specifically, the first screw feeder 1121 is driven by a motor and connected to the bottom discharge port of the first storage tank 111, and can uniformly output the first electrode powder from the first storage tank 111 at a constant speed and evenly shake it onto the first vibrating feeder 1123. The first vibrating feeder 1123 is tilted and can shake the feeding by vibrating the belt, so that the positive electrode powder can be further evenly distributed.

[0042] It should be noted that, in this embodiment, the first synchronous conveyor belt 113 can realize uniform speed movement, so that the first electrode powder can be evenly spread on the upper surface of the first synchronous conveyor belt 113 in combination with the first vibrating feeder 1123 .

[0043] In this embodiment, the first film forming roller group 114 is arranged on the upper side of the first synchronous conveyor belt 113, and a first separation scraper 115 is also arranged on the lower side of the first synchronous conveyor belt 113. The first separation scraper 115 extends to the end of the first synchronous conveyor belt 113 away from the first feeding assembly 112, and is used to peel the formed first film from the first synchronous conveyor belt 113. Specifically, the first separation scraper 115 can extend to the turning point of the first synchronous conveyor belt 113, so as to peel the first film from the surface of the first synchronous conveyor belt 113 in combination with the gravity of the first film.

[0044] It should be noted that, in order to better form the first membrane, the first membrane forming roller group 114 in this embodiment may include a plurality of pressing rollers, which can gradually press the positive electrode powder to ensure the formation of the first membrane.

[0045] The second feeding device 130 includes a second storage tank 131, a second feeding assembly 132, a second synchronous conveyor belt 133 and a second film forming roller group 134. The second storage tank is used to store the second electrode powder. One end of the second feeding assembly 132 is connected to the discharge port of the second storage tank 131, and the other end is connected to the second synchronous conveyor belt 133, which is used to uniformly convey the second electrode powder to the second synchronous conveyor belt 133. The second film forming roller group 134 is arranged at one end of the second synchronous conveyor belt 133 away from the second feeding assembly 132, and is used to press the second electrode powder to form a second film. Specifically, the discharge port of the second storage tank 131 is located at the bottom, the second synchronous conveyor belt 133 is a horizontal conveyor belt, and the second film forming roller group 134 can preliminarily press the second electrode powder on the second synchronous conveyor belt 133 to form a preliminary second film.

[0046] The second feeding assembly 132 includes a second screw feeder 1321 and a second vibrating feeder 1323 connected end to end, one end of the second screw feeder 1321 is connected to the discharge port of the second storage tank 131, and the other end extends to the second vibrating feeder 1323, which is used for spiral feeding to the second vibrating feeder 1323, and the second vibrating feeder 1323 is connected to the second synchronous conveyor belt 133, which is used for vibrating feeding to the second synchronous conveyor belt 133. Specifically, the second screw feeder 1321 is driven by a motor and connected to the bottom discharge port of the second storage tank 131, and can uniformly output the second electrode powder from the second storage tank 131 at a constant speed and evenly shake it onto the second vibrating feeder 1323. The second vibrating feeder 1323 is tilted and can shake the feeding by vibrating the belt, so that the negative electrode powder can be further evenly distributed.

[0047] It should be noted that in this embodiment, the first screw feeder 1121 and the second screw feeder 1321 are used to convey the positive electrode powder and the negative electrode powder respectively, and the volume of the feed per second can be accurately controlled, thereby accurately controlling the thickness of the first diaphragm and the second diaphragm.

[0048] In this embodiment, the second film forming roller group 134 is arranged on the upper side of the second synchronous conveyor belt 133, and a second separation scraper 135 is also arranged on the lower side of the second synchronous conveyor belt 133. The second separation scraper 135 extends to the end of the second synchronous conveyor belt 133 away from the second feeding assembly 132, and is used to peel the formed second film from the second synchronous conveyor belt 133. Specifically, the second separation scraper 135 can extend to the turning point of the second synchronous conveyor belt 133, so as to peel the second film from the surface of the second synchronous conveyor belt 133 in combination with the gravity of the second film.

[0049] In this embodiment, a first film trimming roller group 116 is also arranged between the first shaping roller group 120 and the composite winding device 160, and the first film trimming roller group 116 is used to trim the first film; a second film trimming roller group 136 is also arranged between the second shaping roller group 140 and the composite winding device 160, and the second film trimming roller group 136 is used to trim the second film.

[0050] In this embodiment, a first thickness detection mechanism 117 is also arranged between the first film trimming roller group 116 and the composite winding device 160, and the first thickness detection mechanism 117 is used to detect the thickness of the first film; a second thickness detection mechanism 137 is also arranged between the second film trimming roller group 136 and the composite winding device 160, and the second thickness detection mechanism 137 is used to detect the thickness of the second film.

[0051] Furthermore, a composite correction component 170 is provided between the first thickness detection mechanism 117 and the composite winding device 160, between the second thickness detection mechanism 137 and the composite winding device 160, and between the foil unwinding device 150 and the composite winding device 160. Through the composite correction component 170, the first film, the foil and the second film can be adjusted to the center, thereby ensuring the alignment of the three and improving product quality.

[0052] In this embodiment, multiple sets of tension swing rod assemblies 180 are provided on the material feeding paths of the first diaphragm, the second diaphragm and the composite electrode, and the tension can be controlled in sections through the multiple sets of tension swing rod assemblies 180, thereby increasing the stability of continuous feeding and improving product quality. At the same time, a CCD assembly is provided after the first thickness detection assembly and the second thickness detection assembly to detect the sheet width.

[0053] In this embodiment, a tape splicing platform assembly 151 is further provided between the foil unwinding device 150 and the corresponding composite deviation correction assembly 170. The provision of the tape splicing platform assembly 151 helps to improve the tape splicing efficiency and alignment when the foil is changed, thereby reducing auxiliary working hours and improving equipment production efficiency.

[0054] The composite winding device 160 includes a composite roller group 161, a third thickness detection mechanism 162, a dust removal mechanism 163 and a winding mechanism 164 which are arranged in sequence. The composite roller group 161 is used to composite the first membrane, the foil and the second membrane to form a composite electrode sheet. The third thickness detection mechanism 162 is used to detect the thickness of the composite electrode sheet. The dust removal mechanism 163 is used to remove dust on the composite electrode sheet. The winding mechanism 164 is used to wind up the composite electrode sheet.

[0055] The dry process electrode production equipment 100 provided in this embodiment has the following process: first, the first membrane or the second membrane is pressed. Taking the first membrane as an example, the mixed dry powder is conveyed to the first vibrating feeder 1123 through the first screw conveyor. The first screw feeder 1121 is driven by a servo motor and can accurately control the feeding volume according to the required thickness of the positive electrode membrane; the first vibrating feeder 1123 evenly distributes the first electrode powder through vibration and conveys it to the first synchronous conveyor belt 113; the synchronous belt conveys the evenly distributed first electrode powder to the first membrane forming roller group 114 at a precise target speed, and the first membrane forming roller group 114 presses the first electrode powder into the first membrane through multi-stage rolling; the formed membrane is vertically The belt is run and separated from the synchronous belt under the action of the first separation scraper 115, and enters the first film shaping roller group through the tension swing rod assembly 180. The tension swing rod can be adjusted in real time to ensure that the tension fluctuation of the material belt is within the allowable range, thereby preventing the first film from breaking due to factors such as speed fluctuation; the first film shaping roller group presses the first film to the first target thickness by rolling, and at the same time, the assembly plays a main driving role and realizes tension isolation; then, the first film trimming roller group 116 cuts both sides of the first film and trims the first film to the target width; the trimmed film passes through the second tension swing rod assembly 180 again to detect the thickness through the first thickness detection assembly and the film width size and film defects through the CCD, and the first film pressing production is completed. In order to ensure the position accuracy of the first film when it is subsequently compounded with the foil, a pre-compounding correction assembly is also provided after the CCD detection, which adjusts the position of the first film to the center in real time.

[0056] Then the first diaphragm and the second diaphragm are compounded, and the first diaphragm, the foil and the second diaphragm are compounded into a composite electrode by rolling, wherein the foil separates the first diaphragm and the second diaphragm to prevent short circuit; the foil unwinding device 150 unwinds the continuous rolled foil at the target speed; the splicing platform assembly 151 is used to manually splice the new and old foils after the foil is rewound; the foil maintains a stable tension under the action of the tension swing rod, and then the foil passes through a series of rollers, and a pre-compounding correction assembly is provided before entering the composite roller group, which adjusts the foil position. The position is adjusted to the center in real time; then the foil and the positive second film enter the composite roller group together, and the positive second film and the foil are firmly composited under the hot roller pressure of the composite roller group; the composite electrode strip passes through two CCD components, and the CCD components detect quality defects on both sides, and there is a thickness detection component between the two CCD components to detect the thickness of the electrode strip; the subsequent tension swing rod is used to maintain the stability of the tension of the electrode strip before winding, and after the dust on the electrode strip is removed by the brush component, the winding mechanism 164 winds the continuous composite electrode strip into an electrode strip roll.

[0057] It should be noted that the dry process electrode production equipment 100 provided in this embodiment also has the following advantages:

[0058] 1. The use of a screw feeder for feeding can accurately control the feeding flow rate, thereby ensuring that the subsequent electrode thickness is within the required range.

[0059] 2. Use a vibrating feeder to spread the powder evenly to ensure uniform thickness of the electrode.

[0060] 3. The synchronous belt diaphragm forming roller group can accurately control the diaphragm thickness and improve the compaction density.

[0061] 4. The vertical scraper separation structure can prevent the membrane from sticking to the conveyor belt and prevent the membrane from breaking.

[0062] 5. The use of composite rollers can further improve the compaction density and achieve composite.

[0063] 6. After the diaphragm is formed, it is compounded with the foil material, which improves the mechanical strength of the diaphragm, simplifies the process, and facilitates the subsequent operation of the tab cutting / winding / stacking. The dry process electrode production equipment 100 provided in this embodiment uses the first feeding device 110 to provide the first electrode powder, and presses the first electrode powder into a first diaphragm, and the first shaping roller group 120 rolls the first diaphragm to the first target thickness; at the same time, the second feeding device 130 is used to provide the second electrode powder, and the second electrode powder is pressed into a second diaphragm, and the second shaping roller group 140 rolls the second diaphragm to the second target thickness; in addition, the foil unwinding device 150 provides the foil, and the composite winding device 160 simultaneously composites the first diaphragm, the foil and the second diaphragm to form a composite electrode and rolls it. Compared with the prior art, the dry process electrode production equipment 100 provided in the embodiment of the utility model can solve the problems of uneven thickness, poor mechanical strength and easy breakage of the dry coating diaphragm, and the diaphragm and the foil are compounded at one time, which simplifies the process and improves the equipment efficiency.

[0064] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dry process electrode production equipment, characterized in that: include: A first feeding device (110), the first feeding device (110) being used to provide a first electrode powder and press the first electrode powder to form a first membrane; A first shaping roller group (120), the first shaping roller group (120) is arranged downstream of the first feeding device (110), and is used for rolling the first film sheet to a first target thickness; a second feeding device (130), the second feeding device (130) being spaced apart from the first feeding device (110), and being used for providing a second electrode powder and pressing the second electrode powder to form a second membrane, wherein the first electrode powder and the second electrode powder are both positive electrode powder or negative electrode powder; A second shaping roller group (140), the second shaping roller group (140) is arranged downstream of the second feeding device (130), and is used for rolling the second film sheet to a second target thickness; A foil unwinding device (150), the foil unwinding device (150) being arranged between the first feeding device (110) and the second feeding device (130) and being used for providing foil; A composite winding device (160), wherein the composite winding device (160) is arranged downstream of the first shaping roller group (120), the second shaping roller group (140) and the foil unwinding device, and is used to composite the first diaphragm, the foil and the second diaphragm to form a composite electrode and then wind it up.

2. The dry process electrode production equipment according to claim 1, characterized in that: The first feeding device (110) comprises a first storage tank (111), a first feeding assembly (112), a first synchronous conveyor belt (113) and a first film forming roller group (114), wherein the first storage tank is used to store a first electrode powder, one end of the first feeding assembly (112) is connected to a discharge port of the first storage tank (111), and the other end is connected to the first synchronous conveyor belt (113), and is used to uniformly convey the first electrode powder to the first synchronous conveyor belt (113); the first film forming roller group (114) is arranged at one end of the first synchronous conveyor belt (113) away from the first feeding assembly (112), and is used to press the first electrode powder to form a first film.

3. The dry process electrode production equipment according to claim 2, characterized in that: The first feeding assembly (112) includes a first screw feeder (1121) and a first vibrating feeder (1123) connected end to end, wherein one end of the first screw feeder (1121) is connected to the discharge port of the first storage tank (111), and the other end extends to the first vibrating feeder (1123) for spiral feeding to the first vibrating feeder (1123), and the first vibrating feeder (1123) is connected to the first synchronous conveyor belt (113) for vibrating feeding to the first synchronous conveyor belt (113).

4. The dry process electrode production equipment according to claim 2, characterized in that: The first film forming roller group (114) is arranged on the upper side of the first synchronous conveyor belt (113), and a first separation scraper (115) is also arranged on the lower side of the first synchronous conveyor belt (113). The first separation scraper (115) extends to one end of the first synchronous conveyor belt (113) away from the first feeding assembly (112), and is used to peel off the formed first film from the first synchronous conveyor belt (113).

5. The dry process electrode production equipment according to claim 1, characterized in that: The second feeding device (130) includes a second storage tank (131), a second feeding assembly (132), a second synchronous conveyor belt (133) and a second diaphragm forming roller group (134), wherein the second storage tank is used to store second electrode powder, one end of the second feeding assembly (132) is connected to the discharge port of the second storage tank (131), and the other end is connected to the second synchronous conveyor belt (133), so as to uniformly convey the second electrode powder to the second synchronous conveyor belt (133), and the second diaphragm forming roller group (134) is arranged at one end of the second synchronous conveyor belt (133) away from the second feeding assembly (132), so as to press the second electrode powder into a second diaphragm.

6. The dry process electrode production equipment according to claim 5, characterized in that: The second feeding assembly (132) includes a second screw feeder (1321) and a second vibrating feeder (1323) connected end to end, one end of the second screw feeder (1321) is connected to the discharge port of the second storage tank (131), and the other end extends to the second vibrating feeder (1323) for spiral feeding to the second vibrating feeder (1323), and the second vibrating feeder (1323) is connected to the second synchronous conveyor belt (133) for vibrating feeding to the second synchronous conveyor belt (133).

7. The dry process electrode production equipment according to claim 5, characterized in that: The second film forming roller group (134) is arranged on the upper side of the second synchronous conveyor belt (133), and a second separation scraper (135) is also arranged on the lower side of the second synchronous conveyor belt (133). The second separation scraper (135) extends to one end of the second synchronous conveyor belt (133) away from the second feeding assembly (132), and is used to peel off the formed second film from the second synchronous conveyor belt (133).

8. The dry process electrode production equipment according to claim 1, characterized in that: A first film trimming roller group (116) and a first thickness detection mechanism (117) are sequentially arranged between the first shaping roller group (120) and the composite winding device (160), wherein the first film trimming roller group (116) is used for trimming the first film, and the first thickness detection mechanism (117) is used for detecting the thickness of the first film; a second film trimming roller group (136) and a second thickness detection mechanism (137) are sequentially arranged between the second shaping roller group (140) and the composite winding device (160), wherein the second film trimming roller group (136) is used for trimming the second film, and the second thickness detection mechanism (137) is used for detecting the thickness of the second film.

9. The dry process electrode production equipment according to claim 8, characterized in that: A composite deviation correction component (170) is provided between the first thickness detection mechanism (117) and the composite winding device (160), between the second thickness detection mechanism (137) and the composite winding device (160), and between the foil unwinding device (150) and the composite winding device (160).

10. The dry process electrode production equipment according to claim 1, characterized in that: The composite winding device (160) comprises a composite roller group, a third thickness detection mechanism (162), a dust removal mechanism (163) and a winding mechanism (164) which are arranged in sequence. The composite roller group is used to combine the first membrane, the foil and the second membrane to form a composite electrode sheet. The third thickness detection mechanism (162) is used to detect the thickness of the composite electrode sheet. The dust removal mechanism (163) is used to remove dust on the composite electrode sheet. The winding mechanism (164) is used to wind up the composite electrode sheet.

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