Electronic device and electronic device control method

Abstract

According to an embodiment, there is provided an electronic device including: a first roller; a second roller disposed to face the first roller; and a driving unit that rotatably drives the first roller at a first speed and rotatably drives the second roller at a second speed to form the mixture input between the first roller and the second roller into a film.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to an electronic device and a method for controlling the same, and more particularly, to an electronic device for manufacturing an electrode sheet and a method for controlling the same. Background Art

[0002] Recently, with the increasing concern for the environment, the demand for secondary batteries has increased in order to achieve energy saving and environmental protection. In addition, with the continuous development of technology and the increasing demand for electric vehicles, the battery industry is growing rapidly. Therefore, there are various demands for improving the battery performance of secondary batteries, ensuring safety, improving space utilization, and improving price competitiveness. In order to meet these demands, it is necessary to improve the manufacturing process of secondary batteries.

[0003] A secondary battery is a semi-permanently usable battery that can be used semi-permanently by charging the electric energy generated in the process of causing the oxidation-reduction (redox) reaction of the material between the positive electrode and the negative electrode with an external power source. Unlike a primary battery that can only be used once, a secondary battery can be advantageously charged multiple times and reused.

[0004] A secondary battery includes a positive plate, a negative plate, a separator that separates the positive plate and the negative plate from each other, an electrolyte, and a housing that contains and seals them. The structure including the positive plate, the negative plate, and the separator is called an electrode assembly. Electrodes including the positive plate and the negative plate are formed by providing an active material layer on a substrate such as a current collector.

[0005] In addition, such a positive electrode material is generally manufactured by the following wet manufacturing method. A positive electrode active material, a conductive material, and a binder are input and mixed. A positive electrode slurry is applied to a current collector. Then, the positive electrode slurry is dried to manufacture a positive electrode.

[0006] However, the above-mentioned wet manufacturing method has the problem that it is difficult to manufacture a positive electrode active material layer with a uniform thickness. In addition, the wet manufacturing method has the following problems: a large amount of carbon dioxide harmful to the environment is generated due to solvent drying during the electrode wet manufacturing process. For example, the NMP solvent used to manufacture the electrode is a harmful substance, which causes environmental problems when drying, and because the process is time-consuming, it causes high costs.

[0007] In addition, in order to solve the above problems, a dry manufacturing method that does not require a solvent drying process has been proposed. The dry manufacturing method is a method of mixing a positive electrode active material, a conductive material, and a binder without using a solvent. However, in this case, there is a problem that the binder is fibrotic and the adhesion of the binder is deteriorated. Summary of the invention

[0008] Technical issues

[0009] An object of the present disclosure is to provide an electronic device and a method for controlling the same.

[0010] Another object of the present disclosure is to provide an electronic device manufactured so that fiberization of an electrode sheet can be maximized and a method for controlling the same.

[0011] Another object of the present disclosure is to provide an electronic device capable of providing a maximized shear force and / or a maximized adhesive force to an electrode sheet and a method for controlling the same.

[0012] Another object of the present disclosure is to provide an electronic device configured to manufacture an electrode sheet having a target thickness and a method for controlling the same.

[0013] Those skilled in the art will recognize that the objects that can be achieved by the present disclosure are not limited to the objects specifically described above, and the above and other objects that can be achieved by the present disclosure will be more clearly understood from the following detailed description.

[0014] Technical Solution

[0015] According to one aspect of the present disclosure, an electronic device may include: a first roller; a second roller arranged to face the first roller; and a driving unit that rotates the first roller at a first speed and rotates the second roller at a second speed different from the first speed, so that a mixture fed between the first roller and the second roller is formed into a film.

[0016] The driving unit may drive the first roller and the second roller so that a ratio of the first speed to the second speed is 6:1 to 20:1.

[0017] The driving unit may drive the first roller and the second roller so that a ratio of the first speed to the second speed is 1:1 to 10:1.

[0018] The electronic device may further include: a mixture input unit configured to feed the mixture; and a current collector input unit configured to feed the current collector after the mixture has been input.

[0019] The electronic device may further include: a sensor configured to sense an extent to which the filmed mixture surrounds the outer peripheral surface of the first roller.

[0020] When the sensor senses that the film-shaped mixture surrounds the outer circumferential surface of the first roller by a preset range or more, the current collector input unit may inject the current collector.

[0021] After the current collector is input, the driving unit may drive the first roller and the second roller so that a ratio of the first speed to the second speed is 1:1 to 5:1.

[0022] The first roller and the second roller may rotate in opposite directions.

[0023] The first roller and the second roller may be driven at a temperature of 25°C to 200°C.

[0024] The electronic device may further include: the first roller and the second roller are driven at a temperature of 150°C to 200°C.

[0025] According to another aspect of the present disclosure, a method for controlling an electronic device may include: rotating a first roller at a first speed, and rotating a second roller arranged to face the first roller at a second speed different from the first speed; allowing a mixture to be injected between the first roller and the second roller; and forming the injected mixture into a film using the first roller and the second roller.

[0026] The method may further include driving the first roller and the second roller such that a ratio of the first speed to the second speed becomes 6:1 to 20:1 while injecting the mixture.

[0027] The method may further include driving the first roller and the second roller by a driving unit such that a ratio of the first speed to the second speed becomes 1:1 to 10:1 when injecting the mixture.

[0028] The method may further include: injecting a current collector by a driving unit when the film-shaped mixture surrounds an outer circumferential surface of the first roller to a preset range or more; and forming an electrode plate in which the current collector is attached to the film-shaped mixture.

[0029] The injecting the current collector may include driving the first roller and the second roller by a driving unit such that a ratio of the first speed to the second speed is 1:1 to 5:1.

[0030] Injecting the mixture may include: forming a surface-modified active material coated with at least one of a polymer and a conductive material; forming a mixture by mixing the conductive material, the active material, the surface-modified active material, and a binder; and injecting the mixture.

[0031] Beneficial Effects

[0032] As is apparent from the above description, the electronic device and the method for controlling the same according to the embodiments of the present disclosure can reduce the time and cost required to manufacture electrodes.

[0033] The electronic device and the method for controlling the same according to the embodiments of the present disclosure may minimize environmental pollution occurring in the process of manufacturing an electrode.

[0034] The electronic device and the method for controlling the same according to the embodiments of the present disclosure may maximize the capacity of a manufactured battery.

[0035] The electronic device and the method for controlling the same according to the embodiments of the present disclosure may improve the mechanical properties and / or electrical properties of a manufactured electrode.

[0036] The electronic device and the method for controlling the same according to the embodiments of the present disclosure can simplify the electrode manufacturing process.

[0037] Effects obtainable from the present embodiment are not limited to the above-mentioned effects, and other unmentioned effects can be clearly understood from the above description by those having ordinary skill in the technical field to which the present disclosure pertains. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain the principle of the disclosure.

[0039] Figure 1 is a block diagram illustrating an electronic device according to an embodiment of the present disclosure.

[0040] Figure 2 is a flowchart illustrating a method for controlling an electronic device according to an embodiment of the present disclosure.

[0041] Figure 3 is a cross-sectional view illustrating an electronic device according to an embodiment of the present disclosure.

[0042] Figure 4 is a schematic enlarged view illustrating a mixture introduced into an electronic device according to an embodiment of the present disclosure.

[0043] Figure 5 is a flowchart illustrating a method for controlling an electronic device according to an embodiment of the present disclosure.

[0044] Figure 6 2 is a cross-sectional view illustrating a process of forming a mixture into a film of the electronic device according to the embodiment of the present disclosure.

[0045] Figure 7 is a cross-sectional view schematically illustrating a process of forming a mixture into a film of the electronic device according to the embodiment of the present disclosure.

[0046] Figure 8 is a cross-sectional view schematically illustrating a process of forming an electrode plate of an electronic device according to an embodiment of the present disclosure.

[0047] Fig. 9 is a cross-sectional view schematically illustrating an electrode plate formed in an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] A description of exemplary embodiments disclosed herein will now be given in detail with reference to the accompanying drawings. The same or equivalent components may be provided with the same reference numerals, and their descriptions will not be repeated. As used herein, the suffixes "module" and "component" are added or used interchangeably to facilitate the preparation of this specification, and are not intended to represent different meanings or functions.

[0049] When describing the embodiments disclosed in this specification, in order not to obscure the subject matter of the embodiments disclosed in this specification, the related known technologies may not be described in detail. In addition, it should be noted that the drawings are only for the convenience of understanding the embodiments disclosed in this specification and should not be interpreted as limiting the technical spirit disclosed in this specification. In this way, the present disclosure should be interpreted as extending to any variations, equivalents and substitutions other than those specifically described in the drawings.

[0050] Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are generally used only to distinguish one element from another element. It will be understood that when an element is referred to as being "connected to" another element, the element may be directly connected to the other element, or there may be intermediate elements.

[0051] On the contrary, it will be understood that when an element is referred to as being "directly connected to" another element, there are no intermediate elements. Unless the context indicates an absolutely different meaning, a singular expression may include a plural expression. Terms such as "including" or "having" used herein are intended to indicate the presence of features, numbers, steps, operations, elements, components, or combinations thereof used in the following description, and therefore it should be understood that the possibility of the presence or addition of one or more different features, numbers, steps, operations, elements, components, or combinations thereof is not excluded.

[0052] The battery described in this specification is a secondary battery that can be reused by recharging after discharge. In this case, the secondary battery may include a lead-acid battery, a nickel-cadmium battery, a nickel-hydrogen battery, and a lithium-ion battery. In addition, the electrode assembly described in this specification is an electrode assembly including a positive electrode, a separator, and a negative electrode.

[0053] The electrodes described herein may include a positive electrode or a negative electrode. The electrodes allow the battery to be charged or discharged while an electrochemical reaction occurs due to the movement of electrons. In this case, the positive and negative electrodes include an active material, an active material layer containing a conductive material, and a current collector coated with the active material layer.

[0054] In addition, in this specification, for the convenience of description, the electrode may be referred to by various terms. For example, the electrode may be used interchangeably with a sheet, a film-like mixture, an independent electrode, an electrode plate, and the like.

[0055] Figure 1 is a block diagram illustrating an electronic device 100 according to an embodiment of the present disclosure.

[0056] The electronic device 100 according to the embodiment is a device for manufacturing an electrode. The electronic device 100 can use the raw materials introduced into the electronic device 100 to manufacture the electrode. The electronic device 100 can use the raw materials to manufacture the electrode without using a solvent. At this time, the raw materials include, for example, active materials, conductive materials and / or adhesives. In addition, the raw materials may include, for example, a mixture of at least one of active materials, conductive materials and adhesives. The electronic device 100 can manufacture an electrode by attaching the mixed raw materials to a current collector.

[0057] To this end, the electronic device 100 may include a driving unit 110, a roller 120, a mixture input unit 130, a current collector input unit 140, a sensor 150, and a processor 160. However, Figure 1 The components shown are examples only. The electronic device 100 may include Figure 1 At least some of the components shown, or may include in addition to Figure 1 Other components than those shown.

[0058] The driving unit 110 may drive the roller 120. For example, the driving unit 110 may increase or decrease the rotation speed of the roller 120. The driving unit 110 also rotates the roller 120 clockwise or counterclockwise.

[0059] The roller 120 applies a force to the input raw material. For example, the roller 120 may provide a shear force to the input raw material. In addition, for example, the roller 120 may attach the raw material to the current collector.

[0060] The roller 120 may include one or more rollers. The roller 120 includes, for example, a first roller 121 and a second roller 122. For example, the first roller 121 and the second roller 122 are arranged to face each other. The first roller 121 and the second roller 122 are arranged to be spaced apart from each other by a predetermined distance. For example, the shortest distance between the outer peripheral surface of the first roller 121 and the outer peripheral surface of the second roller 122 may correspond to the thickness of the film formed by the raw material.

[0061] By rotating at least one of the first roller 121 and the second roller 122 , the first roller 121 and / or the second roller 122 may provide a shear force to the raw material injected between the first roller 121 and the second roller 122 .

[0062] The mixture input unit 130 may feed the raw material toward the roller 120. For example, the mixture input unit 130 may feed the raw material between the first roller 121 and the second roller 122. The mixture input unit 130 may inject a predetermined amount of the raw material toward the roller 120.

[0063] The current collector input unit 140 may feed the current collector toward the roller 120. For example, the current collector input unit 140 may feed the current collector between the first roller 121 and the second roller 122. The current collector input unit 140 may inject a predetermined amount of the current collector toward the roller 120.

[0064] The sensor 150 may sense the amount of the mixture injected toward the roller 120. Alternatively, the sensor 150 may sense the amount of the current collector injected toward the roller 120.

[0065] At this time, the sensor 150 may be located on the outer peripheral surface of the roller 120 and may be formed in a channel where the film-like mixture 201 is not wound. Alternatively, the sensor 150 may be embedded inside the roller 120. Alternatively, the sensor 150 may be formed in the mixture input unit 130 or the current collector input unit 140.

[0066] The sensor 150 may include at least one of a proximity sensor, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, a gravity sensor (G sensor), an infrared (IR) sensor, a fingerprint sensor, an ultrasonic sensor, an optical sensor (e.g., a camera), a voice sensor (e.g., a microphone), an environmental sensor (e.g., a hygrometer, a thermometer, a radioactivity detection sensor, a thermal sensor, a gas sensor, etc.), and a chemical sensor (e.g., a health sensor, a biometric sensor, etc.).

[0067] The processor 160 may control all or some of the components included in the electronic device 100. For example, the processor 160 may control the rotation speed and / or the rotation direction of the roller 120 through the driving unit 110 based on the value sensed by the sensor 150.

[0068] The processor 160 may be built in the electronic device 100. For example, the processor 160 may be built in the driving unit 110 or the sensor 150. Alternatively, the processor 160 may be externally mounted on the electronic device 100. In this case, the electronic device 100 receives a command from the processor 160 through a communication unit (not shown) included in the electronic device 100. For example, the processor 160 may be a controller, a central processing unit (CPU), or a microcontroller (MCU).

[0069] Hereinafter, a method of manufacturing an electrode through the above-mentioned components will be described in detail.

[0070] In addition, for the convenience of description, the following description will be given as an example of a case where the roller 120 is a pair of rollers including a first roller 121 and a second roller 122, but the scope or spirit of the embodiment is not limited thereto. For example, an electronic device according to an embodiment may include two or more rollers arranged longitudinally and staggered relative to each other, wherein the rollers face each other and can provide a shear force to the raw material.

[0071] Figure 2 is a flowchart illustrating a method for controlling an electronic device according to an embodiment of the present disclosure.

[0072] like Figure 2 As shown, the method for controlling an electronic device according to an embodiment may include rotating a first roller 121 and a second roller 122 at different speeds ( S101 ).

[0073] The first roller 121 may rotate at a first speed. The second roller 122 may rotate at a second speed. At this time, the first speed and the second speed are the same or different from each other. For example, the first speed is higher than the second speed. The first roller 121 rotates in a first direction, and the second roller 122 rotates in a second direction. At this time, the first direction and the second direction are different from each other. For example, the first roller 121 rotates clockwise, and the second roller 122 rotates counterclockwise. In this way, the electronic device 100 according to the embodiment can apply a shear force to the mixture 200 fed into the roller 120, and form the mixture 200 into a film.

[0074] The electronic device control method according to the embodiment includes injecting a mixture 200 between the first roller 121 and the second roller 122 (S102). For example, the mixture 200 may be formed by mixing a conductive material 210, an active material 220, and a binder 230. At this time, the active material 220 may include a surface-modified active material 220. The mixture input unit 130 may inject the mixture 200 between the first roller 121 and the second roller 122. The mixture 200 is Figure 1 A mixture of at least one of the raw materials described above.

[0075] At this time, the order of S101 and S102 may be changed. For example, after the mixture 200 is injected between the first roller 121 and the second roller 122, the first roller 121 and the second roller 122 may be rotated at different speeds. In addition, S101 and S102 may be performed simultaneously. Figure 3 and Figure 4 S101 and S102 are described in more detail.

[0076] The electronic device control method according to the embodiment includes forming a film-shaped mixture (S103). The first roller 121 and the second roller 122 may apply a force (eg, a shear force) to the mixture 200 introduced between the first roller 121 and the second roller 122. The first roller 121 and the second roller 122 fiberize the binder included in the mixture 200.

[0077] As a result, the electronic device 100 according to the embodiment can form the introduced mixture 200 into a sheet having a predetermined thickness when passing through the first roller 121 and the second roller 122. Figures 5 to 9 Step S103 and subsequent steps after S103 are described in more detail.

[0078] Figure 3 is a cross-sectional view illustrating an electronic device according to an embodiment of the present disclosure.

[0079] Figure 4 is a schematic enlarged view illustrating a mixture introduced into an electronic device according to an embodiment of the present disclosure.

[0080] like Figure 3 As shown, the electronic device 100 according to the embodiment may include a first roller 121 and a second roller 122 arranged to face each other. The first roller 121 rotates along a first direction (a). The second roller 122 rotates along a second direction (b). For example, the first direction (a) and the second direction (b) are different from each other. The first roller 121 rotates at a first speed. The second roller 122 rotates at a second speed. For example, the first speed is higher than the second speed.

[0081] The mixture input unit 130 injects the mixture 200 in a direction (S). That is, the mixture input unit 130 may inject the mixture 200 between the first roller 121 and the second roller 122.

[0082] At this time, the mixture 200 is mixed with the reference Figure 1 and Figure 2 At least one of the raw materials described. For example, Figure 4 As shown, the mixture 200 may include at least one of a conductive material 210 , an active material 220 , and a binder 230 .

[0083] For example, the conductive material 210 may increase the conductivity of the active material 220. For example, the active material 220 may initiate a reaction by electrons and / or ions. For example, the binder 230 may bind the components included in the mixture 200 to each other and may connect the conductive material 210 and the active material 220.

[0084] The active material 220 includes an active material 220 and a surface-modified active material 220. At this time, for example, the surface of the active material 220 having a modified surface is modified by a high-speed mixing device. For example, the surface of the active material 220 is coated with a polymer and / or a conductive material so that the surface of the active material 220 is modified. For example, the surface of the active material 220 may be coated with a polymer and / or a conductive material such as polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), polyethylene (PE) or styrene-butadiene rubber (SBR), so that the surface of the active material 220 is modified. Through this surface modification, the active material 220 can have a higher affinity with the binder 230. The surface-modified active material 220 further enhances the shear force applied to the mixture 200 from the first roller 121 and / or the second roller 122. Therefore, the fiberization of the binder 230 is maximized. In addition, the mechanical properties and electrical properties of the electrode formed by the present embodiment are improved.

[0085] For example, the adhesive 230 may be a fluororesin-based polymer (eg, including PTFE, PVDF, ETFE, etc.), a sulfide-based polymer, polyethylene, or a rubber resin, but the scope of the adhesive 230 is not limited thereto. The adhesive 230 may include all materials having a property of causing fiberization by shear force.

[0086] In addition, the adhesive 230 has a length of, for example, 20 μm to 100 μm. In this way, the adhesive 230 further helps the film-like mixture 201 to maintain a sheet shape.

[0087] The mixture 200 can be formed by mixing the conductive material 210, the active material 220 and the binder 230 by a high-speed mixing device. At this time, the high-speed mixing device is a device that mixes the raw materials fed into the high-speed mixing device at high speed. The high-speed mixing device may include one or more blades for mixing the raw materials. One or more blades can crush or microfibrillate the binder 230. In this way, other electronic devices 100 or electronic device control methods according to the embodiment do not need a process for activating a separate binder 230.

[0088] As described above, the mixture input unit 130 injects the mixture 200 between the first roller 121 and the second roller 122 in the S direction. The first roller 121 and / or the second roller 122 may apply a shear force to the injected mixture 200 through a rolling process.

[0089] At this time, the temperature of the first roller 121 or the second roller 122 is, for example, 25°C to 200°C. The electronic device 100 sets and / or drives the temperature of the first roller 121 or the second roller 122 within a range of 25°C to 200°C. In this way, the electronic device 100 according to the embodiment provides an environment that is easy to work in. Preferably, the temperature of the first roller 121 or the second roller 122 is, for example, 150°C to 200°C. Preferably, the electronic device 100 sets and / or drives the temperature of the first roller 121 or the second roller 122 within a range of 150°C to 200°C. Therefore, the electronic device 100 according to the embodiment can provide an environment in which the affinity between the binder 230 and the active material 220 or the surface-modified active material 220 is further increased. In addition, the electronic device 100 according to the embodiment can maximize the fiberization of the binder 230 through such an environment.

[0090] Hereinafter, steps to be performed after the mixture 200 is injected into the first roller 121 and the second roller 122 will be described in detail.

[0091] Figure 5 is a flowchart illustrating a method for controlling an electronic device according to an embodiment of the present disclosure.

[0092] The electronic device control method according to the embodiment includes injecting the mixture 200 between the first roller 121 and the second roller 122 ( S102 ). Figure 5 The description of S102 in Figure 2 The description of S102 described in is the same or similar to that of S102 described in Figure 2 In the same manner as in , description will be made taking as an example a case where the first roller 121 rotates at a higher speed than the second roller 122.

[0093] The electronic device control method according to the embodiment includes determining whether the film-like mixture 201 surrounds the outer peripheral surface of the first roller 121 ( S201 ). The electronic device 100 may determine whether the film-like mixture 201 surrounds the outer peripheral surface of the first roller 121 through the sensor 150 .

[0094] The electronic device control method according to the embodiment includes forming a sheet if the film-like mixture 201 does not surround the outer peripheral surface of the first roller 121 (S202). In this case, the electronic device 100 may form an independent sheet. Figure 6 The step (S202) is described in more detail.

[0095] The electronic device control method according to the embodiment includes: when the film-like mixture 201 surrounds the outer peripheral surface of the first roller 221, determining whether the film-like mixture 201 surrounds the outer peripheral surface of the first roller 121 to a preset range or more (S203). The processor 160 determines whether the film-like mixture 201 surrounds the outer peripheral surface of the first roller 221 to a preset range or more through the sensor 150. Figure 7 Step S203 is described.

[0096] If the processor 160 determines that the film-shaped mixture 201 does not surround the outer peripheral surface of the first roller 221 by a preset range or more, the processor 160 continues to perform step (S102). That is, the processor 160 can control the mixture input unit 130 to continue injecting the mixture 200 between the first roller 121 and the second roller 122.

[0097] The electronic device control method according to the embodiment may include: when it is determined that the film mixture 201 surrounds the outer peripheral surface of the first roller 221 by a preset range or more, injecting the current collector 300 between the first roller 121 and the second roller 122 (S204). Figure 8 Step S204 is described.

[0098] The electronic device control method according to the embodiment may include determining whether the current collector 300 has been injected to correspond to the film mixture 201 (S205). Figure 8 Step (S205) is described.

[0099] If processor 160 determines that current collector 300 has not been injected to correspond to film mixture 201 , processor 160 continues to perform step S204 . That is, processor 160 controls current collector input unit 140 to continue injecting current collector 300 between first roller 121 and second roller 122 .

[0100] The electronic device control method according to the embodiment includes: if it is determined that the current collector 300 is input to correspond to the film-shaped mixture, forming an electrode plate (S206). Fig. 9 Step (S206) is described.

[0101] In this way, the embodiment can manufacture an electrode sheet having a target thickness while feeding the raw material. In this way, the embodiment can manufacture an electrode sheet having a uniform electrode surface. In addition, the embodiment can simplify the process.

[0102] Figure 6 2 is a cross-sectional view illustrating a process of forming a mixture into a film of the electronic device according to the embodiment of the present disclosure.

[0103] like Figure 3As described above, the first roller 121 rotates at a first speed, and the second roller 122 rotates at a second speed. At this time, the ratio of the first speed to the second speed may be 6:1 to 20:1. That is, the first roller 121 may rotate at a higher speed than the second roller 122.

[0104] The electronic device 100 may apply a shear force to the mixture 200 through the speed difference between the first roller 121 and the second roller 122. For example, the first roller 121 and the second roller 122 may apply a shear force to the mixture 200 to fiberize the binder 230. The binder 230 may connect at least a portion of the plurality of conductive materials 210 and the plurality of active materials 220 while being fiberized. Figure 4 As described above, when the mixture 200 includes the surface-modified active material 220, the uniformity of fiberization is maximized. In addition, in this way, the electronic device 100 can control the friction between the raw materials and control the porosity. At this time, the porosity is the ratio of the empty space between the plurality of active materials 220.

[0105] The first roller 121 and the second roller 122 may film the mixture 200 passing between the first roller 121 and the second roller 122 to form a sheet. At this time, the film-like mixture 201 has a thickness that is the same as or similar to the shortest distance between the outer circumferential surfaces of the first roller 121 and the outer circumferential surfaces of the second roller 122.

[0106] like Figure 6 As shown, the first roller 121 and the second roller 122 have a large speed difference, so that the film-like mixture 201 can be output as it is without being attached to the first roller 121 and / or the second roller 122. In this way, the first roller 121 and the second roller 122 can output the film-like mixture 201 in an independent form. At this time, the film-like mixture 201 is kept in a sheet shape by the fiberized binder 230 to keep the combination between the raw materials.

[0107] In this way, the electronic device 100 according to the embodiment increases the fiberization degree of the binder 230 by providing a large speed difference between the two rollers for the mixture 200. In this way, the electronic device 100 according to the embodiment enables the sheet shape to be well maintained by the increased fiberization. The electronic device 100 according to the embodiment can manufacture an independent dry electrode through a single rolling process.

[0108] In addition, the electronic device 100 according to the embodiment can reduce manufacturing time and cost and prevent environmental pollution by omitting a separate solvent drying process. The electronic device 100 according to the embodiment can more efficiently mass-produce sheets. In addition, the electronic device 100 according to the embodiment can form a high-load electrode, thereby producing a battery with a maximized capacity.

[0109] Figure 7 is a cross-sectional view schematically illustrating a process of forming a mixture into a film of the electronic device according to the embodiment of the present disclosure.

[0110] Figure 7 The first roller 121 and the second roller 122 are shown to Figure 6 Examples of drives with different speed ratios. Figure 3 As shown, the first roller 121 rotates at a first speed, and the second roller 122 rotates at a second speed. At this time, the ratio of the first speed to the second speed may be 1:1 to 10:1. The first roller 121 may rotate at a higher speed than the second roller 122.

[0111] The electronic device 100 may apply a shear force to the mixture 200 through the speed difference between the first roller 121 and the second roller 122. For example, the first roller 121 and the second roller 122 may apply a shear force to the mixture 200 to fiberize the binder 230. As the binder 230 is fiberized, the binder 230 connects at least a portion of the plurality of conductive materials 210 to the plurality of active materials 220. Figure 4 As described above, when the mixture 200 includes the surface-modified active material 220, the uniformity of fiberization is maximized.

[0112] The first roller 121 and the second roller 122 may film the mixture 200 passing between the first roller 121 and the second roller 122 to form a sheet. At this time, the film-like mixture 201 has a thickness that is the same as or similar to the shortest distance between the outer circumferential surfaces of the first roller 121 and the outer circumferential surfaces of the second roller 122.

[0113] like Figure 7 As shown, the first roller 121 and the second roller 122 have a speed difference with each other, so that the film-like mixture 201 is output in a state of being wound on the first roller 121 and / or the second roller 122. The first roller 121 and the second roller 122 can output the film-like mixture 201 in the form of a sheet wound on the rollers. That is, Figure 7 As shown, the film-like mixture 201 is wound on the first roller 121 with a relatively high speed and then output. At this time, the film-like mixture 201 is kept in a sheet shape by the fiberized adhesive 230 to keep the combination between the raw materials.

[0114] In this manner, the electronic device 100 according to the embodiment increases the degree of fiberization of the adhesive 230 by providing a speed difference between the two rollers for the mixture 200. In this manner, the electronic device 100 according to the embodiment allows the sheet shape to be maintained by the increased fiberization.

[0115] also, Figure 1The sensor 150 shown may sense the amount of the mixture injected toward the roller 120. For example, the sensor 150 may sense the extent to which the film-like mixture 201 surrounds the outer peripheral surface of the first roller 121.

[0116] The processor 160 determines whether the film-like mixture 201 surrounds the outer peripheral surface of the first roller 121 by a preset range or more through the sensor 150. If the processor 160 determines that the film-like mixture 201 does not surround the outer peripheral surface of the first roller 121 by a preset range or more, the processor 160 continues to inject the mixture 200 between the first roller 121 and the second roller 122 through the mixture input unit 130. When the processor 160 determines that the film-like mixture 201 surrounds the outer peripheral surface of the first roller 121 by a preset range or more, the processor 160 stops feeding the mixture 200 between the first roller 121 and the second roller 122 through the mixture input unit 130. At this time, the preset range can be, for example, a distance of 0° to 360° relative to the outer peripheral surface of the first roller. For example, when a short electrode is required, the preset range can have a smaller value, such as 90°. Alternatively, when a long electrode is required, the preset range can have a larger value, such as 360°.

[0117] If it is determined that the film-like mixture 201 has surrounded the outer peripheral surface of the first roller 121 by a preset range or more, the processor 160 makes the current collector input unit 140, rather than the mixture input unit 130, closer to the direction between the first roller 121 and the second roller 122. However, if the mixture input unit 130 and the current collector input unit 140 are formed in one module, the processor 160 does not need to control the positions of the mixture input unit 130 and the current collector input unit 140. Figure 8 An example case in which the current collector input unit 140 faces the space between the first roll 121 and the second roll 122 is described in detail.

[0118] Figure 8 is a cross-sectional view schematically illustrating a process of forming an electrode plate of an electronic device according to an embodiment of the present disclosure.

[0119] When the film-shaped mixture 201 surrounds the outer circumferential surface of the first roll 121 by a preset range or more, the current collector input unit 140 inserts the current collector 300 into the space between the first roll 121 and the second roll 122 .

[0120] The current collector 300 may transfer electrons from the outside so that an electrochemical reaction occurs in the active material 220. Alternatively, the current collector 300 receives electrons from the active material and transmits the electrons to the outside. The current collector 300 may be, for example, a current collector coated with a primer.

[0121] When the current collector 300 is inserted, the driving unit 110 allows the first roller 121 to be driven at a first speed and / or the second roller 122 to be driven at a second speed. For example, the driving unit 110 allows the ratio of the first speed to the second speed to be 1:1 to 5:1. Preferably, the driving unit 110 allows the ratio of the first speed to the second speed to be 1:1 to 2:1. The first roller 121 may rotate at a higher speed than the second roller 122.

[0122] In this way, the electronic device 100 according to the embodiment attaches the current collector 301 to the film-like mixture 201. In addition, the electronic device 100 according to the embodiment can increase the adhesion between the film-like mixture 201 and the current collector 301 through the rolling process and maximize the fiberization of the binder 230.

[0123] also, Figure 1 The sensor 150 shown may sense the amount of the current collector 300 injected toward the roller 120. The current collector input unit 140 injects Figure 7 The length of the film-like mixture 201 shown corresponds to a predetermined amount of the current collector 300. Thus, for example, Figure 8 As described above, when the current collector 300 is attached to one surface of the film-like mixture 201 , the longitudinal length of the film-like mixture 201 and the longitudinal length of the attached current collector 301 are the same as or similar to each other.

[0124] The electronic device 100 according to the embodiment may manufacture the electrode plate 400 by attaching the current collector 300 to the mixture 200 via the first roller 121 and the second roller 122 .

[0125] The electrode plate 400 includes a film-like mixture 201 and a current collector 301 attached to one surface of the film-like mixture 201. At this time, the electronic device 100 can perform a rolling process once in the process of forming the mixture 200 into a film, and can perform a rolling process once in the process of attaching the current collector 301 to the film-like mixture 201, so that the electronic device 100 can perform a total of two rolling processes on the mixture 200.

[0126] By one or more rolling processes, the electronic device 100 can manufacture a sheet with low porosity. At this time, the porosity is a measure of the empty space between the plurality of active materials 220. As the porosity decreases, the energy density of the electrode can be increased.

[0127] The electronic device 100 can manufacture a sheet having improved energy density by controlling the porosity as described above.

[0128] In this way, the electronic device 100 according to the embodiment can form a film of the raw material by a single device, and can also laminate the current collector 300 on the film-formed raw material. In addition, the electronic device 100 according to the embodiment can input the mixture 200 into the roller 120 without fiberization of the separate binder 230, and can simultaneously manufacture a plate having an electrode attached to the current collector 300 by one rolling. In this way, the electronic device 100 according to the embodiment can simplify the manufacturing process and reduce production costs.

[0129] In addition, the electronic device 100 according to the embodiment can eliminate the separate solvent drying process, thereby reducing manufacturing time and cost and preventing environmental pollution. The electronic device 100 according to the embodiment can therefore more efficiently mass-produce sheets. In addition, the electronic device 100 according to the embodiment can therefore form a high-load electrode, thereby producing a battery with a maximized capacity.

[0130] Will refer to Fig. 9 Description by Figures 1 to 8 A manufactured electrode (eg, a sheet, a film-like mixture) or an electrode plate including the electrode.

[0131] Fig. 9 is a cross-sectional view schematically illustrating an electrode plate formed in an electronic device according to an embodiment of the present disclosure.

[0132] The electrode plate 400 manufactured according to the embodiment may be formed by laminating a film-like mixture 201 and a current collector 301. Reference numeral 201 is an enlarged view of a portion (B) of the electrode plate 400, showing the film-like mixture 201. Reference numeral 201 may include a portion (B) of the electrode plate 400, and ... Figure 6 Therefore, reference numeral 201 may include both the state of the raw materials included in the independent electrode and the state of the raw materials included in the electrode plate.

[0133] like Fig. 9 As shown, the adhesive 230 is fiberized by the shear force of the first roller 121 and / or the second roller 122. For example, it can be seen that Figure 4 Compared to the adhesive 230 shown, Fig. 9 The binder 230 shown is more entangled with the active material 220 and the conductive material 210. In this way, the fiberized binder 230 is entangled with at least a portion of the conductive material 210 and the active material 220, and acts as a cushion layer inside the electrode. In addition, the fiberized binder 230 can allow the output sheet to be maintained when passing between the first roller 121 and the second roller 122.

[0134] In this way, the electronic device 100 according to the embodiment can produce a sheet by applying a shear force to the mixture 200 through a rolling process without a separate solvent. For example, the electronic device 100 maximizes the shear force by controlling the first roller 121 and the second roller 122 at different speed ratios so that the binder 230 is appropriately fiberized. In addition, in this way, the electronic device 100 provides an electrode with a certain strength level that can be mass-produced.

[0135] A detailed description of an electronic device and a method for controlling the same according to an embodiment of the present disclosure has been given to enable those skilled in the art to implement and practice the present invention. Although the electronic device and the method for controlling the same according to the embodiment have been described with reference to preferred examples, those skilled in the art will recognize that various modifications and variations may be made to the present disclosure without departing from the spirit or scope of the present disclosure described in the appended claims. Therefore, the present disclosure should not be limited to the specific examples described herein, but should be given the widest scope consistent with the principles and novel features disclosed herein.

[0136] Those skilled in the art may practice unspecified embodiments by combining or replacing the disclosed embodiments without departing from the scope of the present disclosure. It will be apparent to those skilled in the art that various modifications and variations may be made to the present disclosure without departing from the spirit or scope of the present invention. Therefore, it is intended that the present disclosure covers these modifications and variations of the present invention that fall within the scope of the appended claims and their equivalents.

[0137] Industrial Applicability

[0138] The electronic device and the method for controlling the same according to the embodiments of the present disclosure have industrial applicability.

Claims

1. An electronic device, comprising: First roller; a second roller arranged to face the first roller; as well as A driving unit that rotates the first roller at a first speed and the second roller at a second speed different from the first speed so that the mixture fed between the first roller and the second roller is formed into a film.

2. The electronic device according to claim 1, wherein: The driving unit drives the first roller and the second roller so that a ratio of the first speed to the second speed is 6:1 to 20:

1.

3. The electronic device according to claim 1, wherein: The driving unit drives the first roller and the second roller such that a ratio of the first speed to the second speed is 1:1 to 10:

1.

4. The electronic device according to claim 3, further comprising: a mixture input unit configured to feed the mixture; as well as A current collector input unit is configured to feed the current collector after the mixture has been input.

5. The electronic device according to claim 4, further comprising: A sensor is configured to sense the extent to which the film-like mixture surrounds the outer peripheral surface of the first roller.

6. The electronic device according to claim 5, wherein: The current collector input unit injects the current collector when the sensor senses that the film-shaped mixture surrounds the outer circumferential surface of the first roller by a preset range or more.

7. The electronic device according to claim 4, wherein: After the current collector is input, the driving unit drives the first roller and the second roller so that a ratio of the first speed to the second speed is 1:1 to 5:

1.

8. The electronic device according to claim 1, wherein: The first roller and the second roller are configured to rotate in opposite directions.

9. The electronic device according to claim 1, wherein: The first roll and the second roll are driven at a temperature of 25°C to 200°C.

10. The electronic device according to claim 9, wherein: The first roll and the second roll are driven at a temperature of 150°C to 200°C.

11. A method for controlling an electronic device, the method comprising the following steps: rotating a first roller at a first speed, and rotating a second roller disposed to face the first roller at a second speed different from the first speed; allowing the mixture to be injected between the first roller and the second roller; as well as The injected mixture is formed into a film using the first roller and the second roller.

12. The method according to claim 11, further comprising the steps of: While the mixture is injected, the first roller and the second roller are driven so that a ratio of the first speed to the second speed becomes 6:1 to 20:

1.

13. The method according to claim 11, further comprising the steps of: While the mixture is injected, the first roller and the second roller are driven by a driving unit such that a ratio of the first speed to the second speed becomes 1:1 to 10:

1.

14. The method according to claim 13, further comprising the steps of: When the film-like mixture surrounds the outer peripheral surface of the first roller to a preset range or more, injecting a current collector by the driving unit; as well as An electrode plate is formed in which the current collector is attached to the film-like mixture.

15. The method according to claim 14, wherein: The step of injecting the current collector comprises the following steps: The first roller and the second roller are driven by the driving unit such that a ratio of the first speed to the second speed is 1:1 to 5:

1.

16. The method according to claim 11, wherein: The step of injecting the mixture comprises the following steps: forming a surface-modified active material coated with at least one of a polymer and a conductive material; forming a mixture by mixing a conductive material, an active material, the surface-modified active material, and a binder; and The mixture was injected.

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