Grinding device for rechargeable battery material

Abstract

A grinding apparatus of the present disclosure includes: a main body member including an inlet through which a raw material is introduced; a fixing member installed inside the main body member; a rotating member mounted inside the main body member and positioned spaced apart from the fixed member; and a driving member mounted outside the main body member and configured to rotate the rotating member, in which the rotating member includes: a disk coupled to the driving member; a first pattern embedded to a set depth on the disk and including a plurality of first lines positioned parallel to each other; a second pattern embedded at a set depth on the disk and including a plurality of second lines arranged to intersect the plurality of first lines and positioned parallel to each other; and a plurality of grinding portions positioned between the plurality of first lines and the plurality of second lines, and protruding outward to grind the raw material.

Description

Technical Field

[0001] The present disclosure relates to a grinding apparatus for rechargeable battery materials. Background Art

[0002] Rechargeable batteries are manufactured in one or more suitable shapes, among which pouch-type batteries include an electrode assembly having an insulator separator (e.g., a separator made of an electrical (electronic) insulator) between a positive electrode plate and a negative electrode plate, and a thin flexible pouch in which the electrode assembly is embedded (e.g., wrapped). In this case, the pouch houses the electrode assembly inside.

[0003] The electrode assembly of a rechargeable battery is mainly divided into (e.g., classified into) a wound type or type and a stacked type or type according to its structure. The stacked type or type has good or suitable structural safety and excellent or suitable space utility, and is therefore widely used in small and medium-sized products. A stacked type or type rechargeable battery includes (or is formed of) a stack of multiple electrodes and a separator.

[0004] The manufacturing process for the electrode of such a rechargeable battery is divided into (classified into) a wet electrode manufacturing method using a solvent to produce an electrode active material slurry and applying the slurry to a current collector, and a dry electrode manufacturing method without using a solvent. That is, the manufacturing process of the rechargeable battery electrode may involve at least one selected from the following two methods: wet electrode manufacturing, using a solvent to produce an electrode active material slurry and applying it to a current collector; and dry electrode manufacturing, without using a solvent. The dry electrode manufacturing method uses an electrode active material mixture containing an electrode active material and one or more suitable compounds to produce a thin film (e.g., layer) of an electrode active material mixture on a surface (e.g., two surfaces (e.g., opposite surfaces)) of an electrode current collector. The manufactured electrode active material film is attached to the electrode current collector by heat and pressure.

[0005] Here, the electrode active material and one or more suitable compounds are ground by a grinding device and then used in a membrane manufacturing process. Compared with the wet electrode manufacturing method, the dry electrode manufacturing method has advantages such as reduced manufacturing costs due to energy and space required or desired for drying and no use (e.g., elimination) of solvents. That is, the dry electrode manufacturing method provides advantages such as reduced manufacturing costs due to energy savings and reduced space required for drying (e.g., no space) and elimination of solvents.

[0006] However, in order to develop excellent or suitable charge and discharge characteristics of the electrode, the thickness of the electrode active material film must be substantially uniform. Here, if the particle size of the raw material is not substantially uniform during the milling process, it is difficult to produce a film with substantially uniform thickness. Summary of the Invention

[0007] The present disclosure is intended to overcome the above problems described in the related art, and an aspect according to one or more embodiments of the present disclosure is directed to a grinding device capable of uniformly (eg, substantially uniformly) grinding a raw material that can be used to manufacture a rechargeable battery.

[0008] The technical problems to be solved by the present disclosure are not limited to those described above, and those skilled in the art will clearly understand other problems not mentioned through the following description. In addition, additional aspects of the embodiments will be partially set forth in the following description, and in part will be obvious from the description, or can be learned by practicing the embodiments presented in the present disclosure.

[0009] A grinding device according to one or more embodiments of the present disclosure includes: a main member including an inlet through which a raw material is introduced; a fixed member inside the main member; a rotating member inside the main member and spaced and / or separated from the fixed member (e.g., spaced apart or separated); and a driving member externally mounted to the main member (e.g., mounted to the outside of the main member) and configured to rotate the rotating member, wherein the rotating member includes: a disk coupled to the driving member; a first pattern embedded on the disk to a set (e.g., a certain) depth and including a plurality of first lines parallel to each other; a second pattern embedded on the disk at a set (e.g., a certain) depth and including a plurality of second lines parallel to each other, the plurality of second lines intersecting the plurality of first lines; and a plurality of grinding portions between the plurality of first lines and the plurality of second lines and protruding to the outside (e.g., protruding toward the fixed member) to grind the raw material.

[0010] The second line may be positioned perpendicular to (eg, orthogonal to) the first line.

[0011] The second line may be positioned obliquely relative to the first line.

[0012] A cooling unit configured to cool the fixing member may be further included.

[0013] The cooling unit may include: a heat exchange member installed inside the fixing member and configured to perform heat exchange with the fixing member; and a cooler externally mounted to the body member (eg, mounted to the outside of the body member) and connected to the heat exchange member.

[0014] A refrigerant may be inside the heat exchange member, and the cooler is configured to circulate the refrigerant.

[0015] The fixing member may include a penetration portion passing through a portion (eg, an opening) corresponding to the inlet of the body member in an up-down direction to allow the raw material to pass therethrough.

[0016] The rotating member may further include a rotating blade installed in a central portion of the disc and configured to grind the raw material.

[0017] The body member may include an outlet through which the feedstock is discharged.

[0018] The outlet may be located at an underside of the body member.

[0019] The rotating member may include a plurality of abrasive zones.

[0020] Each of the plurality of grinding zones may be positioned at a set (eg, a certain) angle relative to the center of the disk.

[0021] In the plurality of polishing zones, the first patterns in adjacent polishing zones may be arranged to be rotated (e.g., deflected) by a certain angle relative to each other. In other words, the first pattern in one polishing zone among the plurality of polishing zones is arranged at a set angle to the first pattern in the adjacent polishing zone.

[0022] The second patterns in adjacent polishing zones, respectively, may be arranged to be rotated (e.g., deflected) by a certain angle relative to each other. That is, the second pattern in one polishing zone among the plurality of polishing zones is arranged at a set angle to the second pattern in the adjacent polishing zone.

[0023] There can be 6 grinding zones.

[0024] A vertical cross-section of the grinding portion may have a trapezoidal shape.

[0025] A distance between top ends of adjacent grinding portions among the plurality of grinding portions may be in a range of 3 mm to 6 mm.

[0026] An angle between adjacent grinding portions among the plurality of grinding portions may be in a range of 30 degrees to 50 degrees.

[0027] The fixing member may have a disc shape.

[0028] The disks of the stationary member and the rotating member may have corresponding sizes.

[0029] According to the present disclosure, a grinding device may include a rotating member including a first pattern, a second pattern, a grinding segment, and a grinding portion, so that a raw material can be ground more uniformly (eg, substantially uniformly) than a related art grinding device.

[0030] Therefore, when manufacturing a rechargeable battery, the active material film can be manufactured from a uniformly (e.g., substantially uniformly) ground raw material, and thus an active material film having a substantially uniform thickness throughout can be manufactured (e.g., easily). Therefore, if a rechargeable battery is manufactured using a grinding apparatus according to one or more embodiments (e.g., when a rechargeable battery is manufactured using this grinding apparatus), a rechargeable battery having excellent or suitable charge and discharge characteristics can be manufactured. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following drawings accompanying this specification illustrate embodiments of the present disclosure and further illustrate the technical idea of ​​the present disclosure together with the following detailed description of the present disclosure, and the present disclosure should not be construed as being limited to the contents shown in the drawings.

[0032] Figure 1 is a cross-sectional view illustrating a grinding apparatus according to one or more embodiments.

[0033] Figure 2 is included in Figure 1 A top plan view of a rotating component in a grinding device.

[0034] Figure 3 is a top plan view illustrating a rotating member according to one or more embodiments.

[0035] Figure 4 is a top plan view showing a fixing member and a cooling unit.

[0036] Figure 5 is a top plan view showing a rotating member according to a comparative example.

[0037] Figure 6 is a photograph of feedstock ground by a rotating member according to one or more embodiments.

[0038] Figure 7 is a photograph of a raw material ground by a rotating member according to a comparative example. DETAILED DESCRIPTION

[0039] Hereinafter, one or more embodiments of the present disclosure are described with reference to the accompanying drawings. The terms and words used in this specification and claims should not be interpreted as having a general or dictionary meaning, but should be interpreted as having a meaning and concept that is consistent with the technical ideas of the present disclosure (for example, consistent with it) based on the principle that the inventors can appropriately or properly define concepts and terms to best describe their disclosures. Therefore, the configurations described in the example embodiments and drawings of the present disclosure are only preferred embodiments and do not represent all technical ideas of the present disclosure, so the present disclosure should be interpreted as including all changes, equivalents and replacements included in the scope of the present disclosure when submitting this application.

[0040] It should be further understood that the terms “include” and / or “comprises”, if (for example, when) used in this specification, specify the presence of stated features, integers, steps (for example, actions or tasks), operations, elements, components and / or groups, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0041] In addition, the drawings may be exaggerated in size rather than drawn to scale in order to facilitate understanding of the present disclosure. In addition, in one or more embodiments, like reference numerals may be assigned to like components.

[0042] A statement that two objects of comparison are "the same" means "substantially the same"

[0043] Therefore, "substantially the same" may include deviations that are considered low in the related art, such as deviations of no more than 5%. In addition, the uniformity of a parameter in a given area may refer to uniformity over an average angle.

[0044] Although the terms "first", "second", etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another component, and unless specifically stated otherwise, the first component may also be called the second component.

[0045] Throughout the specification, unless otherwise stated, each component may be singular or plural.

[0046] If (for example, when) any configuration (for example, a component) is described as being arranged "on top of" (or "under") another component or "above" (or "below") another component, it may mean that the configuration is arranged in contact with the top surface (or bottom surface) of the other component, and the other configuration (for example, a component) may be between the other component and the configuration arranged on (or below) the other component.

[0047] In addition, if a component is described as being “on,” “connected to,” or “coupled to” another component, the components may be directly on, connected to, or coupled to each other, but it should be understood that other components may be “interposed” between the components, or each component may be “on,” “coupled to,” or “connected to” it through other components.

[0048] As used herein, the term "and / or" includes any one or all combinations of one or more related items. In addition, if (for example, when) describing an embodiment of the present disclosure, the use of "may" relates to "one or more embodiments of the present disclosure."

[0049] Expressions such as “at least one of,” if preceding a list of elements, may modify the entire list of elements rather than the individual elements of the list.

[0050] Throughout this specification, if (for example, when) reference is made to "A and / or B", it means A, B, or A and B unless specifically stated otherwise, and if (for example, when) reference is made to "C to D", it means C or higher and D or lower unless specifically stated otherwise.

[0051] When phrases such as "at least one selected from A, B, and C," "at least one selected from A, B, or C," "at least one selected from the combination of A, B, and C," and "at least one of A, B, or C" are used to specify a list of elements A, B, and C, the phrase may refer to any and all suitable combinations.

[0052] The term "use" may be considered synonymous with the term "utilize."

[0053] As used herein, terms such as "substantially" and "approximately" are used as terms of approximation, rather than terms of degree, and are intended to account for the inherent variations in measurements or calculations that those of ordinary skill in the art would appreciate.

[0054] It should be understood that although the terms "first," "second," and / or "third" may be used herein to describe one or more suitable elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, a first element, component, region, layer, or part discussed herein may be referred to as a second element, component, region, layer, or part without departing from the scope of this disclosure.

[0055] As shown, for ease of explanation, spatially relative terms such as "under," "below," "down," "below," "above," and / or "on" may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures. It should be understood that the spatial relative positions are intended to encompass different orientations of the device when in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "under," "beneath," or "below" other elements or features will be oriented "above" the other elements or features. Thus, the term "downward" can include (e.g., simultaneously) both an above and a below orientation.

[0056] The terminology used herein is intended to describe the embodiments of the present disclosure and is not intended to be limiting thereof.

[0057] Hereinafter, a grinding device according to one or more embodiments will be described in more detail with reference to the accompanying drawings.

[0058] Figure 1 is a cross-sectional view illustrating a grinding apparatus according to one or more embodiments. Figure 2 is viewed from above, including Figure 1 A plan view of the rotating component of the grinding device.

[0059] refer to Figure 1 and Figure 2 The grinding device 100 for a rechargeable battery material according to one or more embodiments may include a main body member (e.g., a housing) 110, a fixing member (e.g., a fixing unit or a stationary member) 150, a rotating member (e.g., a rotating unit) 130, and a driving member (e.g., a driving unit) 140.

[0060] The main body member 110 accommodates a fixed member 150 and a rotating member 130, which will be described in more detail later. The main body member 110 includes an inlet 111 through which raw materials are input (e.g., loaded). In addition, the main body member 110 includes an outlet 112 through which raw materials are discharged.

[0061] In one or more embodiments, the grinding device 100 is used for rechargeable battery materials according to one or more embodiments, and the raw material used for grinding in the grinding device 100 can be graphite, which is used to manufacture an active material film (e.g., layer) of a rechargeable battery, but the present disclosure is not limited thereto.

[0062] The outlet 112 may be positioned at the lower side of the body member 110. The raw material ground by the rotating member 130 moves to the lower side of the body member 110. The rotating member 130 will be described in more detail later. In addition, the raw material can be discharged through the outlet 112 by the torque generated by the rotation of the rotating member 130.

[0063] The fixing member 150 is installed inside the main body member 110. The fixing member 150 may be shaped like a disk, for example.

[0064] The fixing member 150 may include a through portion (e.g., an opening) 151. The through portion 151 penetrates the portion corresponding to the inlet 111 of the main member 110 in the vertical direction to allow the raw material to pass through. In other words, the fixing member 150 may include an opening at a position overlapping with the inlet 111 of the main member 110 to allow the raw material to pass through. The raw material introduced into the inlet 111 can pass through the through portion 151 of the fixing member 150 and flow into the space between the fixing member 150 and the rotating member 130.

[0065] The rotating member 130 is installed inside the body member 110 and is positioned to be spaced apart and / or separated (eg, spaced apart or separated) from the fixed member 150. The raw material may be ground by the rotation of the rotating member 130.

[0066] The fixed member 150 may be positioned above the rotating member 130. The raw material flows between the fixed member 150 and the rotating member 130. The rotating member 130 is rotated by the driving member 140, which will be described in more detail later, and the raw material can be ground into small particles by continuously impacting (e.g., colliding) the rotating member 130 and the fixed member 150. A detailed description of the rotating member 130 will be given later.

[0067] The driving member 140 is installed outside the main body member 110 and rotates the rotating member 130. For example, the driving member 140 may be a rotary motor. The driving member 140 may be positioned below the main body member 110, but the present disclosure is not limited to this configuration.

[0068] For example, the rotating member 130 includes a disk 131 , a first pattern 132 , a second pattern 133 , and a grinding portion 134 .

[0069] The disk 131 is coupled to the driving member 140. The disk 131 may be shaped like a disk, for example. The disk 131 of the rotating member 130 and the fixed member 150 may have corresponding sizes (eg, substantially similar sizes).

[0070] In one or more embodiments, the upper side (e.g., upper surface) of the disk 131 may be shaped to slope downward from the center to the periphery. Therefore, the raw material ground between the rotating member 130 and the fixed member 150 may move to the outside of the disk 131 by its own weight (e.g., gravity).

[0071] The first pattern 132 includes first lines 132a. The first lines 132a are formed to be embedded in the disk 131 to a set depth or a certain depth, and are positioned parallel to each other. For example, the first lines 132a can be formed as channels or grooves having a set depth or a certain depth on the upper portion of the disk 131. The first lines 132a are linear and can be positioned at regular intervals.

[0072] The second pattern 133 includes second lines 133a. The second lines 133a are formed to be embedded in the disk 131 to a set depth or a certain depth, arranged to intersect with the plurality of first lines 132a, and positioned parallel to each other. For example, the second lines 133a can be formed as channels or grooves having a set depth or a certain depth on the upper portion of the disk 131. The second lines 133a are linear and can be positioned at regular intervals.

[0073] In some embodiments, the second line 133a may be positioned perpendicular to (eg, orthogonal to) the first line 132a. In some embodiments, the shape of a horizontal cross section of the grinding portion 134 may be a quadrilateral, which will be described in more detail later.

[0074] The grinding portion 134 is located between the first line 132a and the second line 133a and protrudes to the outside (e.g., toward the fixing member 150) to grind the raw material. The raw material can be ground while colliding with the grinding portion 134. The shapes of the first and second patterns 132 and 133 and the shape of the grinding portion 134 can determine the size of the ground raw material.

[0075] For example, the vertical cross-section of the grinding portion 134 may be trapezoidal in shape. Here, the distance H between the uppermost ends of adjacent grinding portions 134 in the rotating member 130 (e.g., the plurality of grinding portions 134) may be in the range of 3 mm to 6 mm. Furthermore, the angle M between adjacent grinding portions 134 (e.g., the sidewalls of the grinding portions 134) in the rotating member 130 (e.g., the plurality of grinding portions 134) may be in the range of 30 degrees to 50 degrees. The grinding portion 134 having the above-described shape may be advantageous or desirable for uniformly (e.g., substantially uniformly) grinding the raw material.

[0076] In one or more embodiments, the rotating component 130 may further include rotating blades 135 .

[0077] The rotating blade 135 is installed in the center portion of the disk 131 and grinds the raw material. The grinding part 134 can grind the raw material into a small size, but the rotating blade 135 can grind the raw material into a relatively large size compared to the grinding part 134.

[0078] The rotating blades 135 (for example, preferably) grind the raw material into a larger size, and the grinding portion 134 grinds the raw material (the raw material after being ground by the rotating blades 135) into a relatively smaller size than the rotating blades 135. In this way, by further including the rotating member 130 of the rotating blades 135, the time for grinding the raw material can be significantly shortened.

[0079] In one or more embodiments, the rotating member 130 may include a plurality of abrasive zones 136 .

[0080] Each of the plurality of abrasive zones 136 may be positioned at an angle relative to the central portion of the disk 131. For example, the plurality of abrasive zones 136 may radiate outward from the central portion of the disk 131. For example, the direction and extent of each of the plurality of abrasive zones 136 radiating outward from the central portion of the disk 131 may be determined based on the angle relative to the central portion of the disk 131. For example, there may be six abrasive zones 136. In this case, one abrasive zone 136 may be positioned every 60 degrees relative to (e.g., around) the central portion of the disk 131.

[0081] In the plurality of polishing zones 136, the first patterns 132 respectively located in adjacent polishing zones 136 may be arranged to be rotated (e.g., deflected) by a certain angle relative to each other. In addition, in the plurality of polishing zones 136, the second patterns 133 respectively located in adjacent polishing zones 136 may be arranged to be rotated (e.g., deflected) by a certain angle relative to each other.

[0082] For example, if there are six grinding zones 136, the first patterns 132 located in adjacent grinding zones 136 may be arranged at an angle of 60 degrees to each other, and the second patterns 133 similar to the first patterns 132 may form an angle of 60 degrees to each other. That is, each first pattern 132 located in the first grinding zone 136 may be arranged at an angle of 60 degrees to each first pattern 132 located in the second grinding zone 136, and each second pattern 133 located in the first grinding zone 136 may be arranged at an angle of 60 degrees to each second pattern 133 located in the second grinding zone 136.

[0083] The rotating member 130 as described above includes a plurality of grinding zones 136, and the first pattern 132 of each grinding zone 136 is positioned at a different angle (e.g., a different angle from the first pattern 132 of an adjacent grinding zone 136), and the second pattern 133 is also positioned at a different angle (e.g., a different angle from the second pattern 133 of an adjacent grinding zone 136), so that the raw material can be ground more smoothly.

[0084] Figure 3 is a top plan view showing a rotating member according to an embodiment.

[0085] refer to Figure 3 The second wire 133a included in the rotating member 230 according to the exemplary modification may be positioned at a certain angle relative to the first wire 132a. For example, the second wire 133a may be positioned at a 45-degree angle relative to the first wire 132a. However, the second wire 133a is not necessarily limited to being positioned at a 45-degree angle relative to the first wire 132a.

[0086] In an embodiment, the grinding portion 134 may have a diamond-shaped horizontal cross section. The rotating member 130 including the grinding portion 134 of this shape rotates to grind the raw material.

[0087] Figure 4 This is a plan view from above, with the fixing components and cooling unit extracted.

[0088] refer to Figure 4 and Figure 1 The grinding apparatus 100 for a rechargeable battery material according to one or more embodiments may further include a cooling unit 160 .

[0089] The cooling unit 160 cools the fixing member 150 .

[0090] For example, the cooling unit 160 may include a heat exchange member 161 and a cooler 162 .

[0091] The heat exchange member 161 is installed inside the fixing member 150 and exchanges heat with the fixing member 150. For example, the heat exchange member 161 may be a heat pipe.

[0092] The cooler 162 is installed outside the body member 110 and is connected to the heat exchanging member 161 .

[0093] In the cooling unit 160 as described above, the interior of the heat exchange member 161 may be filled with a refrigerant (eg, coolant). In addition, the cooler 162 may circulate the refrigerant. For example, the cooler 162 may be a pump, but the present disclosure is not limited thereto.

[0094] The rotating member 130 rotates, so the raw material can have substantially continuous friction (or collision) with the fixed member 150. During this process, the heat generated by the fixed member 150 can be transferred to the raw material. The cooling unit 160 can cool the fixed member 150 to prevent or reduce overheating of the raw material due to the heat generated by the fixed member 150.

[0095] The higher the raw material temperature, the less smooth the grinding, which may result in larger particles or clogging due to internal agglomeration. However, when the cooling unit 160 cools the fixing member 150 as described above, the temperature of the raw material can be maintained at an appropriate or suitable temperature suitable for grinding.

[0096] The grinding device 100 for rechargeable battery materials according to one or more embodiments described above includes a rotating member 130 including a first pattern 132 , a second pattern 133 , and a grinding portion 134 , thereby making the size of the raw material more uniform compared to a comparative grinding device.

[0097] It can be confirmed through the following grinding experiments that the grinding apparatus 100 for rechargeable battery materials according to one or more embodiments powders (eg, grinds) raw materials more uniformly (eg, substantially uniformly) than a related art grinding apparatus.

[0098] A grinding experiment was conducted by grinding a raw material for 3 seconds using the grinding apparatus according to one or more embodiments and the grinding apparatus according to the comparative example.

[0099] According to one or more embodiments, the grinding device includes Figure 2 The grinding device of the rotating member shown. In addition, Figure 5 The polishing device according to the comparative example shown is a polishing device 10 including a rotating member having only the first pattern P without the second pattern.

[0100] Table 1 shows the ratios of particles of a specific size in raw materials ground using grinding devices according to one or more embodiments and grinding devices according to comparative examples. The total weight of the raw materials is 100, without any quantity (or unit). The ratio of particles of each size represents the ratio of the weight of all particles of that size to the total weight of the raw materials.

[0101] Table 1

[0102] Particle size Ratio of Example Ratios of comparative examples More than 2000μm 0.24 30.35 2000~1000μm 3.12 25.27 1000~500μm 83.62 12.27 500~300μm 4.46 11.24 300~150μm 6.10 9.38 Less than 150μm 2.46 11.49

[0103] Referring to Table 1, it can be confirmed that the highest ratio of the particle size of the raw material ground by the grinding apparatus according to one or more embodiments is 83.62, and most of the raw material is ground to a size of 1000 to 500 μm. Figure 6 As shown, the raw material is ground to a generally uniform size.

[0104] In contrast, returning to Table 1, in the case of grinding the raw material using the grinding device according to the comparative example, the ratio of particles with a size exceeding 2000 μm is 30.35, the ratio of particles with a size between 2000 and 1000 μm is 25.27, and the ratio of particles with a size between 1000 and 500 μm is 12.27. Figure 7 As shown, the feedstock is ground to varying (eg, non-uniform) sizes.

[0105] As described above, the grinding apparatus according to one or more embodiments grinds the raw material more uniformly than the grinding apparatus according to the comparative example. This experiment confirmed that the grinding apparatus according to one or more embodiments sprays (e.g., grinds) the raw material more uniformly than the grinding apparatus of the related art. In other words, it was confirmed that the grinding apparatus according to one or more embodiments grinds the raw material into a more uniform particle size than the grinding apparatus of the related art.

[0106] Unless otherwise defined, in this disclosure, the term "particle diameter" or "particle size" refers to the average diameter if the particles are spherical, and to the average major axis length if the particles are non-spherical. The average particle size can be measured by a suitable method (e.g., known to those skilled in the art), for example, it can be measured by a particle size analyzer, or it can be measured by transmission electron microscopy images or scanning electron microscopy images. In one or more embodiments, the average particle size value can be obtained by measuring using a dynamic light scattering method, performing data analysis, counting the number of particles in each particle size range, and calculating accordingly. Unless otherwise defined, the average particle size can refer to the particle size with 50% by volume of the cumulative volume in the particle size distribution (D 50 As used herein, if no definition is otherwise provided (e.g., when no definition is otherwise provided), the average particle size refers to the particle size having 50% by volume of the cumulative volume in the particle size distribution (D 50 ), which is obtained by randomly measuring the size (diameter or length of the major axis) of approximately 20 particles when scanning electron microscopy images.

[0107] The battery manufacturing equipment, grading device and / or any other related equipment or components according to the embodiments of the present invention described herein can be implemented using any suitable hardware, firmware (e.g., an application-specific integrated circuit), software, or a combination of software, firmware, and hardware. For example, the various components of the device can be formed on an integrated circuit (IC) chip or on separate IC chips. In addition, the various components of the device can be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on a substrate. In addition, the various components of the device can be processes or threads running on one or more processors in one or more computing devices, executing computer program instructions and interacting with other system components to perform the various functions described herein. The computer program instructions are stored in a memory that can be implemented in the computing device using a standard storage device such as a random access memory (RAM). The computer program instructions can also be stored in other non-transitory computer-readable media, such as a CD-ROM, a flash drive, etc. In addition, those skilled in the art will appreciate that, without departing from the scope of this disclosure, the functions of various computing devices can be combined or integrated into a single computing device, or the functions of a particular computing device can be distributed across one or more other computing devices.

[0108] In view of the entire content of this disclosure, those skilled in the art will understand that each appropriate feature of the various embodiments of the present disclosure may be combined in part or in whole or in combination with each other, and may be technically interlocked and operated in various appropriate manners, unless otherwise stated or implied, each embodiment may be implemented independently of each other or in combination with each other in any appropriate manner.

[0109] The cited drawings and detailed description of the present disclosure are merely examples for describing the present disclosure and are not intended to limit the meaning or scope of the present disclosure recited in the claims. Therefore, those skilled in the art to which the present disclosure pertains can readily appreciate that one or more suitable modifications and equivalent embodiments may be feasible. Therefore, the technical scope of the present disclosure is not intended to be limited to the contents set forth in the detailed description of the specification, but is intended to be defined by the appended claims and their equivalents.

[0110] Reference Numbers

[0111] 100: Grinding device for rechargeable battery materials

[0112] 110: Main component 111: Entrance

[0113] 112: Exit 130: Rotating component

[0114] 131: Plate 132: First pattern

[0115] 132a: first line 133: second pattern

[0116] 133a: Second line 134: Grinding part

[0117] 135: Rotating blade 136: Grinding area

[0118] 140: driving member 150: fixing member

[0119] 151: Through portion 160: Cooling unit

[0120] 161: Heat exchange component 162: Cooler

Claims

1. A grinding device comprising: a main body member including an inlet through which raw materials are introduced; A fixing member, located inside the main body member; a rotating member inside the main body member and spaced apart from the fixed member; and a drive member, external to the body member and configured to rotate the rotating member, The rotating member comprises: a disc coupled to the drive member; a first pattern embedded in the disk to a set depth and comprising a plurality of first lines parallel to each other; a second pattern embedded at a set depth on the disk and including a plurality of second lines parallel to each other, the plurality of second lines crossing the plurality of first lines; and a plurality of grinding portions between the plurality of first wires and the plurality of second wires and protruding toward the fixing member to grind the raw material, and The grinding device is a grinding device for rechargeable battery materials.

2. The grinding device according to claim 1, wherein: The plurality of second lines are positioned perpendicular to the plurality of first lines.

3. The grinding device according to claim 1, wherein: The plurality of second lines are positioned obliquely with respect to the plurality of first lines.

4. The grinding device according to claim 1, further comprising: A cooling unit is configured to cool the fixing member.

5. The grinding device according to claim 4, wherein: The cooling unit comprises: a heat exchanging member installed inside the fixing member and configured to perform heat exchange with the fixing member; and A cooler is installed outside the main body member and connected to the heat exchange member.

6. The grinding device according to claim 5, wherein: Refrigerant is filled in the interior of the heat exchange member, and The cooler is configured to circulate the refrigerant.

7. The grinding device according to claim 1, wherein: The fixing member includes an opening corresponding to the inlet of the body member to allow the raw material to pass therethrough.

8. The grinding device according to claim 1, wherein: The rotating member further includes a rotating blade installed in a central portion of the disc and configured to grind the feedstock.

9. The grinding device according to claim 1, wherein: The body member includes an outlet through which the feedstock is discharged.

10. The grinding device according to claim 9, wherein: The outlet is positioned at an underside of the body member.

11. The grinding device according to claim 1, wherein: The rotating member includes a plurality of abrasive zones.

12. The grinding device according to claim 11, wherein: The plurality of grinding zones are each positioned at a set angle relative to the center of the disk.

13. The grinding device according to claim 11, wherein: The first pattern in a grinding area among the plurality of grinding areas is arranged at a set angle to the first pattern in an adjacent grinding area.

14. The grinding device according to claim 11, wherein: The second pattern in a grinding area among the plurality of grinding areas is arranged at a set angle to the second pattern in an adjacent grinding area.

15. The grinding device according to claim 11, wherein: The rotating member includes 6 grinding zones.

16. The grinding device according to claim 1, wherein: A vertical cross-section of the plurality of grinding portions has a trapezoidal shape.

17. The grinding device according to claim 1, wherein: A distance between tops of adjacent grinding portions among the plurality of grinding portions is in a range of 3 mm to 6 mm.

18. The grinding device according to claim 1, wherein: An angle between adjacent grinding portions among the plurality of grinding portions is in a range of 30 degrees to 50 degrees.

19. The grinding device according to claim 1, wherein: The fixing member has a disc shape.

20. The grinding device according to claim 19, wherein: The disks of the stationary member and the rotating member have corresponding sizes.

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