Magnetizer

Abstract

The magnetizer may include: a first frame member including a first accommodating portion configured to accommodate two or more first magnets arranged in a first direction with the same first polarity; and a second frame member including a second accommodating portion configured to accommodate two or more second magnets arranged in a second polarity different from the first polarity, and configured to maintain a state in contact with the first frame member by an attractive force between the two or more first magnets and the two or more second magnets.

Description

Technical Field

[0001] One aspect of the embodiments disclosed herein relates to magnetizers. Background Technology

[0002] Recently, rechargeable batteries have been widely used not only in small devices such as portable electronic devices, but also in medium to large devices such as battery packs or energy storage devices for hybrid or electric vehicles.

[0003] Such a rechargeable battery is a power generating device that can be formed as a stacked structure of positive electrode-separator-negative electrode and can be repeatedly charged and discharged. In this power generating device, the positive electrode typically includes lithium metal oxide as the positive electrode active material, and the negative electrode can include a carbon-based negative electrode active material such as graphite. During charging, lithium ions emitted from the positive electrode are inserted into the carbon-based negative electrode active material of the negative electrode, and during discharging, lithium ions contained in the carbon-based negative electrode active material are inserted into the lithium metal oxide of the positive electrode, so that it can be repeatedly charged and discharged.

[0004] At this point, graphite materials such as natural graphite can be examples of negative electrode active materials used in negative electrodes. This type of graphite has a layered structure, and the carbon atoms form a grid structure, allowing it to be formed as a stack of multiple planar unfolded layers.

[0005] During charging, lithium ions penetrate the edge surfaces of these graphite layers (the surfaces where the layers overlap) and diffuse between the layers. Furthermore, during discharging, lithium ions can desorb from the layer edges and be released. Additionally, because the resistivity of graphite in the planar direction of the layers is lower than its resistivity in the stacking direction, conductive paths are created for electrons to travel along the planar direction of the layers.

[0006] In this regard, a typical process for manufacturing electrode plates (negative electrode plates) for lithium rechargeable batteries using graphite is as follows.

[0007] Figure 1 This is a flowchart illustrating a typical method for manufacturing electrode plates.

[0008] refer to Figure 1 The method S10 for manufacturing an electrode plate includes a slurry dispensing step S11, a magnetization step S12, which orients graphite to a magnetic field, and a drying step S13, which dries the slurry.

[0009] Here, magnetization step S12 is a step of orienting the graphite contained in the negative electrode to a magnetic field in order to improve the charging performance of the negative electrode. More specifically, when forming the negative electrode, the [0, 0, 2] crystal planes of the graphite are oriented in the magnetic field such that they are almost horizontal relative to the negative electrode current collector, and this is fixed. In this case, since the edge surface of the graphite layer faces the positive electrode active layer, lithium ion insertion and desorption can be performed smoothly or easily, and the electronic conduction path is shortened, thereby improving the electronic conductivity of the negative electrode and thus improving the charging performance of the battery.

[0010] Therefore, in manufacturing the negative electrode, a method is used to align the graphite by applying a magnetic field to the negative electrode slurry containing graphite as a carbon-based negative electrode active material using a magnetizer.

[0011] More specifically, orientation refers to the process of keeping the graphite layer oriented constant by passing the negative electrode coating over a magnetizer containing a strong permanent magnet. Good orientation minimizes or reduces the distance lithium (Li) ions travel within the graphite, thereby reducing drag and improving battery performance.

[0012] In conventional magnetizers, a horizontal magnetic field is formed between permanent magnets connected with opposite polarities. Therefore, the larger the size of the permanent magnets embedded in the magnetizer (e.g., the larger the size in the direction of movement of the substrate), the smaller the area of ​​the horizontal magnetic field on the negative electrode coating, thereby improving the orientation performance.

[0013] However, if the permanent magnets are manufactured to be too large, proper magnetization orientation may not be achieved during manufacturing, leading to size limitations. Therefore, it is desirable to arrange multiple permanent magnets with their polarities facing the same direction and to generate a magnetic field that allows for proper orientation. Summary of the Invention

[0014] According to an aspect of the embodiments of this disclosure, a magnetizer with improved directional performance is provided.

[0015] However, the aspects and technical problems to be solved by this disclosure are not limited to those described above, and those skilled in the art will understand other aspects and purposes not mentioned herein through the following description.

[0016] According to one or more embodiments of the present disclosure, a magnetizer may include: a first frame member including a first receiving portion configured to receive two or more first magnets arranged in a first direction with the same first polarity; and a second frame member including a second receiving portion configured to receive two or more second magnets arranged in a second polarity different from the first polarity, and configured to remain in contact with the first frame member by the attractive force between the two or more first magnets and the two or more second magnets.

[0017] The first frame member may include: a first base portion including an upper side and a lower side that respectively contact (e.g., in close contact) with the first magnets of two or more first magnets; a first outer wall portion at each of the opposite ends of the first base portion (e.g., connected to each of the opposite ends of the first base portion); and a first unit blocking portion extending from the first base portion and between the first outer wall portions, and located between the adjacent first magnets of the two or more first magnets.

[0018] The second frame member may include: a second base portion including an upper side and a lower side that respectively contact (e.g., in close contact) with the second magnets of two or more second magnets; a second outer wall portion at each of the opposite ends of the second base portion (e.g., connected to each of the opposite ends of the second base portion); and a second unit blocking portion extending from the second base portion and between the second outer wall portions, and located between adjacent second magnets of two or more second magnets.

[0019] The first receiving portion may be located on each of the upper and lower sides of the first frame member.

[0020] The second receiving portion may be located on each of the upper and lower sides of the second frame member.

[0021] The three first receiving portions can be located on each of the upper and lower sides of the first frame member along the length direction of the first frame member.

[0022] The three second receiving portions may be located on each of the upper and lower sides of the second frame member along the length of the second frame member.

[0023] In each of two or more first magnets, the N pole may be above the S pole, and in each of two or more second magnets, the S pole may be above the N pole.

[0024] In each of two or more first magnets, the N pole may be below the S pole, and in each of two or more second magnets, the S pole may be below the N pole.

[0025] The magnetizer may include: a protrusion that protrudes from one side of one of the first and second frame members; and an insertion portion that is defined in the other of the first and second frame members, has a size corresponding to the protrusion, and the protrusion is inserted into the insertion portion.

[0026] A magnetizer according to one or more embodiments of the present disclosure may include at least two first magnets configured in one group and at least two second magnets configured in another group. Therefore, compared to a magnetizer (not shown) in which permanent magnets are arranged in alternating polarities, a magnetizer can increase the magnetization area in the vertical direction by making the period of polarity change longer.

[0027] Furthermore, in the magnetizer according to one or more embodiments of this disclosure, the first frame member and the second frame member are magnetically connected by the first magnet and the second magnet without separate fastening devices. Therefore, the first frame member and the second frame member can be easily separated using common equipment used in a manufacturing plant. That is, maintenance procedures for the magnetizer according to the embodiments can be performed very smoothly or easily.

[0028] Furthermore, it can be confirmed that, compared with conventional magnetizers, magnetizers according to one or more embodiments have a significantly improved effect in orienting graphite into a magnetic field. Attached Figure Description

[0029] Figure 1 This is a flowchart illustrating a typical method for manufacturing electrode plates.

[0030] Figure 2 This is a perspective view showing a rechargeable battery.

[0031] Figure 3 It shows the components used in manufacturing including Figure 2 A cross-sectional view of the substrate and active material layer of the electrode plate in the electrode assembly of a rechargeable battery.

[0032] Figure 4 This is a perspective view showing a magnetizer according to an embodiment.

[0033] Figure 5 It is shown Figure 4 Side view of the magnetizer.

[0034] Figure 6 This is a side view illustrating a process in which a magnetizer orients a paste applied to a substrate according to an embodiment.

[0035] Figure 7 This is a side view showing a first frame member and a second frame member according to another embodiment.

[0036] Figure 8 This is a perspective view showing a magnetizer according to another embodiment.

[0037] Figure 9 The measurement results of the magnetic vector due to the magnetizer according to the embodiment are shown.

[0038] Figure 10 The results of the measurement of the magnetic vector due to the magnetizer are shown according to the comparative example.

[0039] Explanation of reference numerals in the attached figures

[0040] 100, 200: Magnetizers; 110, 210: First frame components

[0041] 111: First receiving portion; 112: First base portion

[0042] 113: First outer wall portion; 114: First unit blocking portion

[0043] 115: First magnet; 120, 220: Second frame components

[0044] 121: Second receiving portion; 122: Second base portion

[0045] 123: Second outer wall section; 124: Second unit blocking section

[0046] 125: Second magnet; 130: Protruding part

[0047] 140: Insertion section Detailed Implementation

[0048] Some exemplary embodiments are described in more detail herein to further illustrate the invention. However, these embodiments are provided to enable those skilled in the art to understand this disclosure and may be embodied in many different forms, and this disclosure should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure is thorough and complete, and these embodiments will fully convey the scope of the inventive concept to those skilled in the art.

[0049] Additionally, for the sake of brevity and clarity, the dimensions or thicknesses of various components may be exaggerated in the accompanying drawings, and the same figures always refer to the same element. As used herein, the term "and / or" includes any one and all combinations of one or more of the related listed items. Furthermore, it should be understood that when element A is referred to as being "connected to" element B, element A may be directly connected to element B, or one or more intermediary elements C may be present therein, such that element A and element B may be indirectly connected to each other.

[0050] The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit this disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that, when used in this specification, the terms “comprising” and / or “including” specify the presence of the stated features, numbers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and / or groups thereof.

[0051] It should be understood that although the terms "first," "second," etc., can be used to describe various components, elements, areas, layers, and / or parts, these components, elements, areas, layers, and / or parts should not be limited by these terms. These terms are used to distinguish one component, element, area, layer, and / or part from another. Thus, for example, without departing from the teachings of this disclosure, the first component, first element, first area, first layer, and / or first part discussed below can be referred to as a second component, second element, second area, second layer, and / or second part.

[0052] Additionally, spatially related terms such as “below,” “under,” “down,” “above,” or “above” can be used to better understand the elements or features shown in the accompanying drawings. It should be understood that, in addition to the orientations depicted in the drawings, these spatially relative terms are intended to encompass different orientations of the device in use or operation. For example, if an element or feature in the drawings were flipped, an element described as “below” or “under” other elements or features would be oriented as “above” or “above” other elements or features. Thus, the example term “below” can include both above and below orientations.

[0053] Before describing the magnetizer according to the embodiment, a rechargeable battery comprising electrode plates that can be manufactured using the magnetizer according to the embodiment will be described in more detail.

[0054] Figure 2 This is a perspective view showing a rechargeable battery.

[0055] refer to Figure 2 The rechargeable battery 10 may include an electrode assembly 20 and a housing 500.

[0056] The electrode assembly 20 may include a plurality of electrode plates 300 and a diaphragm 400. More specifically, the plurality of electrode plates 300 may include a first electrode plate 300A and a second electrode plate 300B.

[0057] The electrode assembly 20 may be in the form of a laminate in which a first electrode plate 300A, a second electrode plate 300B and a diaphragm 400 are repeatedly wound or stacked.

[0058] For example, the electrode assembly 20 may be stacked, wherein electrode plates 300A and 300B are configured to be stacked into multiple layers. For example, the electrode assembly 20 may be a repeatedly wound electrode core type. In this disclosure, a stacked electrode assembly 20 will be described as an example.

[0059] In a typical manufacturing process for a stacked electrode assembly 20, a single-stage stacking process and a double-stage stacking process can be performed.

[0060] In a single stacking process, all negative electrodes and all positive electrodes can be stacked. Here, an all negative electrode can refer to any first electrode plate 300A other than the outermost first electrode plate 300A among a plurality of first electrode plates 300A. Conversely, an all positive electrode can be a second electrode plate 300B.

[0061] In the secondary stacking process, based on the stacking orientation, the half-negative electrode can be stacked on at least one of the opposite outermost sides. Here, the half-negative electrode can be the outermost first electrode plate 300A among the first electrode plates 300A.

[0062] For ease of illustration, Figure 2 The illustration shows an example of an electrode assembly 20 in which a half-negative electrode is stacked on the outermost upper side; however, the half-negative electrode can be stacked on each of the outermost upper side and the outermost two sides of the electrode assembly 20.

[0063] Here, a full negative electrode and a full positive electrode are electrodes on both surfaces of a substrate where the active material layer is applied, and a half negative electrode is an electrode on only one surface of the substrate where the active material layer is applied. Further detailed descriptions of full negative electrodes, full positive electrodes, and half negative electrodes are not included here.

[0064] A separator 400 may be located between the first electrode plate 300A and the second electrode plate 300B. The separator 400 can prevent or substantially prevent short circuits between the first electrode plate 300A and the second electrode plate 300B, and can allow the movement of lithium ions. For this purpose, the separator 400 may be formed to be relatively larger than the dimensions of the first electrode plate 300A and the second electrode plate 300B.

[0065] The diaphragm 400 may comprise a porous polymer membrane or a porous nonwoven fabric. Here, the porous polymer membrane may be configured to comprise a single layer or multiple layers of polyolefin polymers such as ethylene polymers, propylene polymers, ethylene / butene copolymers, ethylene / hexene copolymers, and ethylene / methacrylate copolymers. The porous nonwoven fabric may comprise high-melting-point glass fibers or polyethylene terephthalate fibers, etc. However, this disclosure is not limited thereto, and depending on the embodiment, the diaphragm may be a high-heat-resistant diaphragm comprising ceramics (e.g., a ceramic-coated diaphragm (CCS)).

[0066] The diaphragm 400 can be cut into unit lengths and disposed between the first electrode plate 300A and the second electrode plate 300B, or a strip-shaped diaphragm 400 can be disposed in a serrated form between the first electrode plate 300A and the second electrode plate 300B. In one embodiment, the diaphragm 400 can be mounted by winding it along a first direction between the first electrode plate 300A and the second electrode plate 300B.

[0067] Therefore, the arrangement of the diaphragm 400 is not limited to a specific form. However, in this embodiment, for ease of description, it is described that the diaphragm 400 is cut into unit lengths and disposed between the first electrode plate 300A and the second electrode plate 300B.

[0068] The housing 500 can accommodate the electrode assembly 20. The electrode assembly 20 can be accommodated together with the electrolyte in the housing 500.

[0069] Here, the electrolyte can be a non-aqueous electrolyte. The electrolyte may include lithium salts and organic solvents. The organic solvent may include one or more selected from the group consisting of propylene carbonate (PC), ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), methyl propyl carbonate (MPC), dipropyl carbonate (DPC), vinylene carbonate (VC), dimethyl sulfoxide, acetonitrile, dimethoxyethane, diethoxyethane, sulfolane, γ-butyrolactone, propylene sulfide, and tetrahydrofuran.

[0070] The housing 500 can be any of the following types: bag-shaped, cylindrical, and prismatic. A bag-shaped housing 50 can be manufactured by bending a plate-like outer material and then pressing or stretching the surface to have recesses on the surface.

[0071] The electrode assembly 20 can be accommodated in a recess (not labeled). A sealing portion 501 is provided on the outer periphery of the recess, and the sealing portion 501 can be sealed by a method such as heat sealing when the electrode assembly 20 is accommodated in the recess.

[0072] In the plurality of electrode plates, the first electrode plate 300A can be a negative electrode and the second electrode plate 300B can be a positive electrode, and vice versa. The first electrode plate 300A and the second electrode plate 300B can be electrically connected to the outside of the rechargeable battery 10 via a strip terminal 520.

[0073] Additionally, insulating tape 510 can be attached to the portion of the strip terminal 520 that contacts the housing 500. Insulating tape 510 can prevent or substantially prevent electrical connection between the strip terminal 520 and the housing 500.

[0074] Figure 3 It shows the components used in manufacturing including Figure 2 A cross-sectional view of the substrate and active material layer of the electrode plate in the electrode assembly of a rechargeable battery.

[0075] refer to Figure 3 In the manufacturing process of the electrode plate included in the electrode assembly, the electrode plate can be manufactured by applying an active material layer C on the substrate B.

[0076] Substrate B may be a current collector, and the current collector may include known conductive materials to the extent that no chemical reaction occurs within the rechargeable battery. For example, the current collector may include any of stainless steel, nickel (Ni), aluminum (Al), titanium (Ti), copper (Cu), and alloys thereof, and may be provided in any of a variety of forms such as a film, sheet, or foil.

[0077] Although not shown in the accompanying drawings, substrate B may include current collectors and uncoated areas.

[0078] The active material layer C can be applied to at least one surface of the current collector. The active material layer C can be applied to the remaining portion of the current collector except for the edge regions. The edge regions of the current collector can be uncoated areas where the active material layer C is not applied.

[0079] In one embodiment, the active material layer C may be located in a portion of at least one surface of the substrate B and may have ends formed as multi-stages. For example, the edges of the active material layer C may be configured to be spaced apart from the edges of the substrate B to form multi-stages. In one embodiment, a protective film (not shown) may be attached to the boundary portion between the active material layer C and the substrate B.

[0080] A method for depositing the active material layer C on the substrate B can be, for example, using a slot coater M (see...). Figure 6 The method can be, but is not limited to, any of the various slurry (active substance) coating methods.

[0081] The magnetizer according to the embodiment can magnetize the slurry discharged from the slot coater M.

[0082] In one embodiment, the active material layer C may further include an adhesive (not shown) and a conductive material (not shown).

[0083] An adhesive (not shown) can form a bond between substrate B and the active material, thereby improving mechanical stability. For example, the adhesive can be an organic adhesive or a water-based adhesive, and can be used with a tackifier such as carboxymethyl cellulose (CMC). In one embodiment, the organic adhesive can be any one of vinylidene fluoride-hexafluoropropylene copolymer (PVDF-co-HFP), polyvinylidene fluoride (PVDF), polyacrylonitrile, and polymethyl methacrylate, and the water-based adhesive can be styrene-butadiene rubber (SBR), but this disclosure is not limited thereto.

[0084] Conductive materials (not shown) can improve the conductivity of rechargeable batteries. In one embodiment, the conductive material may include a metallic sheet. In one embodiment, the conductive material may include a typical carbon-based conductive material. In one embodiment, the conductive material may include one of graphite, carbon black, graphene, and carbon nanotubes. In one embodiment, the conductive material may include carbon nanotubes, but is not limited thereto.

[0085] The magnetizer according to the embodiment will be described in more detail with reference to the accompanying drawings.

[0086] Figure 4 This is a perspective view showing a magnetizer according to an embodiment; and Figure 5 It is shown Figure 4 Side view of the magnetizer.

[0087] refer to Figure 4 and Figure 5 The magnetizer 100 according to the embodiment may include a first frame member 110 and a second frame member 120.

[0088] The first frame member 110 may include a first receiving portion 111 therein for accommodating two or more first magnets 115. The first receiving portion 111 may be located on each of the upper and lower sides of the first frame member 110. The two or more first magnets 115 may be arranged with the same polarity along (or toward) a first direction.

[0089] The first frame member 110 may include, for example, a first base portion 112, a first outer wall portion 113, and a first unit blocking portion 114.

[0090] The first base portion 112 may include an upper side and a lower side, and the first magnet 115 may contact (e.g., in close contact) each of the upper and lower sides of the first base portion 112.

[0091] The first outer wall portion 113 can be connected to each of the two ends or opposite ends of the first base portion 112.

[0092] The first unit blocking portion 114 may extend from the first base portion 112 and between the first outer wall portions 113, and may be located between the first magnets 115 that are adjacent to each other.

[0093] The second frame member 120 may include a second receiving portion 121 therein for accommodating two or more second magnets 125. The second receiving portion 121 may be located on each of the upper and lower sides of the second frame member 120.

[0094] The second magnet 125 can be arranged with a polarity different from that of the first magnet 115. In one embodiment, the N pole of the first magnet 115 can be positioned above the S pole, and the S pole of the second magnet 125 can be positioned above the N pole. However, although not shown in the figures, the N pole of the first magnet 115 can be positioned below the S pole, and the S pole of the second magnet 125 can be positioned below the N pole.

[0095] The second frame member 120 can be kept in contact with the first frame member 110 by the attraction between the first magnet 115 and the second magnet 125.

[0096] The second frame component may include, for example, a second base portion 122, a second outer wall portion 123, and a second battery cell blocking portion 124.

[0097] The second base portion 122 may include an upper side and a lower side, and the second magnet 125 may contact (e.g., in close contact) each of the upper and lower sides of the second base portion 122.

[0098] The second outer wall portion 123 can be connected to each of the two ends or opposite ends of the second base portion 122.

[0099] The second unit blocking portion 124 can extend from the second base portion 122 and between the second outer wall portions 123, and can be located between the second magnets 125 that are adjacent to each other.

[0100] The magnetizer 100 according to the above embodiment includes at least two first magnets 115 arranged in a group in the first frame member 110 and at least two second magnets 125 arranged in a group in the second frame member 120. Therefore, compared with a magnetizer (not shown) in which permanent magnets are arranged with alternating polarities, the magnetizer 100 according to the embodiment can increase the magnetization area in the vertical direction by making the period of polarity change longer.

[0101] Furthermore, in conventional magnetizers where the permanent magnets are mounted on a frame, separation of the permanent magnets from the frame is very difficult or impossible when maintenance is required due to the attraction between the permanent magnets, making the only solution to manufacture a new frame.

[0102] However, in the magnetizer 100 according to the embodiment, the first frame member 110 and the second frame member 120 are magnetically connected by the first magnet 115 and the second magnet 125 without separate fastening devices. Therefore, the first frame member 110 and the second frame member 120 can be easily separated using common equipment used in a manufacturing plant. That is, the maintenance process of the magnetizer according to the embodiment can be performed very smoothly or easily.

[0103] Figure 6 This is a side view showing the process of orienting slurry applied to a substrate by a magnetizer.

[0104] refer to Figure 6 During the process of magnetizing the active material layer C by the magnetizer 100 according to the embodiment, the first frame member 110 and the second frame member 120 may be arranged parallel to one direction, and the substrate B to which the active material layer C is applied is conveyed along that direction.

[0105] In one embodiment, substrate B may contact (e.g., in close contact) multiple rollers R and may be conveyed by a roller-to-roll method. A slot coater M may discharge slurry onto the surface of substrate B, and an active material layer C may be formed on substrate B. Magnetizer 100 may be mounted adjacent to and parallel to substrate B.

[0106] Accordingly, the magnetic field generated by the magnetizer 100 according to the embodiment can be generated on the active material layer C on the substrate B, so that the magnetic field orientation of graphite can be performed smoothly.

[0107] Figure 7 This is a side view showing a first frame member and a second frame member according to another embodiment.

[0108] refer to Figure 7 In a first frame member 210 according to another embodiment, three first receiving portions 111 may be disposed on each of the upper and lower sides of the first frame member 210 along the length direction of the first frame member 210.

[0109] In addition, in the second frame member 220, three second receiving portions 121 may be arranged on each of the upper and lower sides of the second frame member 220 along the length direction of the second frame member 220.

[0110] In other words, up to three first magnets 115 can be mounted on the first frame member 210 and up to three second magnets 125 can be mounted on the second frame member 220, which can be adapted to orient the active material layer applied on the substrate.

[0111] In one embodiment, in the case of a magnetizer 100 in which four first magnets 115 are mounted on a first frame member 210 and four second magnets 125 are mounted on a second frame member 220, the entire length of each of the first magnets 115 and the second magnets 125 may be configured to be too long and may be difficult to generate a magnetic field that is oriented sufficiently.

[0112] Figure 8 This is a perspective view showing a magnetizer according to another embodiment.

[0113] refer to Figure 8 According to another embodiment, the magnetizer 200 may include a protruding portion 130 and an insertion portion 140.

[0114] The protruding portion 130 may protrude from one side of one of the frame members 110 and 120. The shape of the protruding portion 130 may be, for example, cylindrical, but is not limited thereto, and the shape of the protruding portion 130 may be any of a variety of shapes such as triangular prism or square prism.

[0115] The insertion portion 140 may be defined in the remaining one of the first frame member 110 and the second frame member 120 and may have dimensions corresponding to the protrusion 130, and the protrusion 130 may be inserted into the insertion portion 140. For this purpose, the insertion portion 140 may have a shape corresponding to the protrusion 130.

[0116] For ease of description, it is assumed that the protruding portion 130 can be mounted on the second frame member 120, and the insert portion 140 is mounted on the first frame member 110.

[0117] The first frame member 110 may include two first outer wall portions 113A and 113B, and the second frame member 120 may also include two second outer wall portions 123A and 123B. The insertion portion 140 may be located in the first outer wall portion 113B that contacts the second frame member 120. Additionally, the protruding portion 130 may be located in the second outer wall portion 123A that contacts the first frame member 110.

[0118] In the magnetizer 200 according to the above embodiment, when the first frame member 110 and the second frame member 120 are connected to each other, the protruding portion 130 can be accommodated in the insertion portion 140.

[0119] Accordingly, the first frame member 110 and the second frame member 120 can be precisely positioned at the target location. Therefore, the magnetizer 200 can generate a strong magnetic field and further improve the magnetic field orientation effect with respect to graphite.

[0120] The experiments described in this paper confirm that the magnetizer according to the embodiment improves the magnetic field orientation of graphite compared to conventional magnetizers.

[0121] The magnetizer according to the implementation method is Figure 4 The magnetizer shown is a typical magnetizer (not shown) in which multiple permanent magnets are arranged in alternating polarities.

[0122] Figure 9 The measurement results of the magnetic vector due to the magnetizer according to the embodiment are shown. Figure 10 The results of the measurement of the magnetic vector due to the magnetizer are shown according to the comparative example.

[0123] refer to Figure 9 and Figure 10 In the case of the magnetizer according to the embodiment, the maximum and minimum values ​​of the magnetic field are generally increased by 18% compared to the magnetizer according to the comparative example. In particular, considering that the minimum value is obtained in a vector field perpendicular to the ground, the increase of 18% in the minimum value is significant.

[0124] Furthermore, when comparing the average value (|Bz|) of the magnetizers of the embodiment and the comparative example (the average of the absolute values ​​of the magnetic field vector perpendicular to the ground), the magnetizer according to the comparative example measured 4650 G (Gauss), and the magnetizer according to the embodiment measured 4750 G. Compared with the magnetizer according to the comparative example, the magnetizer according to the embodiment provides an increase of approximately 2%.

[0125] As described above, experiments have confirmed that the magnetizer according to the embodiment provides a stronger magnetic field in the vertical direction compared to conventional magnetizers. Therefore, it can be confirmed that the magnetizer according to the embodiment has a significantly improved effect in orienting graphite into the magnetic field compared to conventional magnetizers.

[0126] Although this disclosure has been described in conjunction with some currently considered practical embodiments, the accompanying drawings and detailed descriptions of this disclosure described above are merely illustrative and provided for the purpose of describing the invention, and should not be construed as limiting the scope of this disclosure as set forth in the claims. Therefore, those skilled in the art will understand that various modifications and other equivalent embodiments can be made based on this disclosure. Accordingly, the scope of protection of this disclosure will be defined by the claims.

Claims

1. A magnetizer, comprising: The first frame member includes a first receiving portion configured to receive two or more first magnets arranged along a first direction with the same first polarity; as well as The second frame member includes a second receiving portion configured to accommodate two or more second magnets arranged with a second polarity different from the first polarity, and configured to remain in contact with the first frame member by the attractive force between the two or more first magnets and the two or more second magnets.

2. The magnetizer according to claim 1, wherein, The first frame component includes: The first base portion includes an upper side and a lower side that are respectively in contact with the first magnet of the two or more first magnets; The first outer wall portion, at each of the opposite ends of the first base portion; and The first unit blocking portion extends from the first base portion and between the first outer wall portions, and is located between adjacent first magnets of the two or more first magnets.

3. The magnetizer according to claim 1, wherein, The second frame component includes: The second base portion includes an upper side and a lower side that are respectively in contact with the second magnet of the two or more second magnets; The second outer wall portion, at each of the opposite ends of the second base portion; and The second unit blocking portion extends from the second base portion and between the second outer wall portions, and is located between adjacent second magnets of the two or more second magnets.

4. The magnetizer according to claim 1, wherein, The first receiving portion is located on each of the upper and lower sides of the first frame member.

5. The magnetizer according to claim 1, wherein, The second receiving portion is located on each of the upper and lower sides of the second frame member.

6. The magnetizer according to claim 1, wherein, Three first receiving portions are located on each of the upper and lower sides of the first frame member along the length direction of the first frame member.

7. The magnetizer according to claim 1, wherein, Three second receiving portions are located on each of the upper and lower sides of the second frame member along the length direction of the second frame member.

8. The magnetizer according to claim 1, wherein, In each of the two or more first magnets, the N pole is above the S pole, and in each of the two or more second magnets, the S pole is above the N pole.

9. The magnetizer according to claim 1, wherein, In each of the two or more first magnets, the N pole is below the S pole, and in each of the two or more second magnets, the S pole is below the N pole.

10. The magnetizer according to any one of claims 1 to 9, further comprising: The protruding portion protrudes from one side of one of the first frame members and the second frame member; as well as An insertion portion, defined in another frame member of the first frame member and the second frame member, has a size corresponding to the protruding portion, and the protruding portion is inserted into the insertion portion.

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