Electrode assembly manufacturing plate, electrode assembly manufacturing apparatus, and electrode assembly manufacturing method

Abstract

The present invention relates to an electrode assembly manufacturing plate, an electrode assembly manufacturing apparatus comprising the same, and an electrode assembly manufacturing method, the electrode assembly manufacturing plate comprising: a support plate; a daughter board disposed on one surface of the support board; and a distance control unit provided on the support plate and configured to push away a portion of a surface opposite to the surface facing the support plate from the support plate such that a distance to the support plate is different from the remaining portion.

Description

Technical Field

[0001] This invention relates to an electrode assembly manufacturing plate, an electrode assembly manufacturing apparatus, and an electrode assembly manufacturing method.

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2023-0135772, filed with the Korean Intellectual Property Office on October 12, 2023, and Korean Patent Application No. 10-2024-0137536, filed with the Korean Intellectual Property Office on October 10, 2024, the entire contents of which are incorporated herein by reference. Background Technology

[0003] Unlike primary batteries, secondary batteries can be rechargeable and feature small size and high capacity. Recently, research and development of secondary batteries have been actively pursued. With the technological advancements and increasing demands of mobile devices, the need for rechargeable batteries as an energy source is rapidly growing.

[0004] Secondary batteries are classified into button batteries, cylindrical batteries, corner batteries, and pouch batteries based on the shape of their casings. In secondary batteries, the electrode assembly installed in the casing is a power-generating element with a structure made by stacking electrodes and a separator, capable of being charged and discharged.

[0005] Electrode assemblies can be broadly classified into: rolled electrode assemblies made by winding sheet-shaped positive and negative electrodes coated with active materials and a separator placed between the positive and negative electrodes; stacked electrode assemblies made by sequentially stacking multiple positive and negative electrodes with separators inserted between them; and stacked and folded electrode assemblies made by winding stacked cell cells with long separation membranes.

[0006] A diaphragm comprising a binding agent with bonding strength can be used to manufacture electrode assemblies. Electrodes and diaphragms can be bonded together by heating and pressing the electrode assembly, including the diaphragm. Therefore, the stacked structure of the electrodes and diaphragms constituting the electrode assembly can be stable. Furthermore, to ensure uniform bonding of the electrodes and diaphragms, the electrodes and diaphragms can be preheated before heating and pressing the electrode assembly. Summary of the Invention

[0007] Technical issues

[0008] The inventors have discovered that when an electrode assembly, including electrodes and a diaphragm, is pressed and / or heated, the electrode assembly adheres to the stacking table or pressing plate, leading to a deterioration in the efficiency of the electrode assembly manufacturing process. Furthermore, the inventors have discovered that the electrode assembly may be damaged during the process of separating it from the stacking table or pressing plate.

[0009] The present invention provides an electrode assembly manufacturing plate, an electrode assembly manufacturing apparatus including the electrode assembly manufacturing plate, and an electrode assembly manufacturing method including the electrode assembly manufacturing plate. The electrode assembly manufacturing plate is provided to improve processing efficiency and prevent damage to the electrode assembly by preventing the electrode assembly from adhering during the manufacturing process.

[0010] Technical solution

[0011] Embodiments of the present invention provide an electrode assembly manufacturing plate, the electrode assembly manufacturing plate comprising:

[0012] Support plate;

[0013] Sub-plate, the sub-plate being disposed on one surface of the support plate; and

[0014] A distance control unit is disposed on a support plate and configured to push a portion of the opposite surface of the subplate from the support plate such that the distance from the opposite surface portion to the support plate is different from the distance from the remaining portion to the support plate.

[0015] According to this embodiment, the distance control unit may be a vertical drive unit, which is configured as part of the support subplate and moves in the vertical direction relative to a surface of the support plate.

[0016] According to this embodiment, the electrode assembly manufacturing plate may further include: an auxiliary support unit disposed on the support plate and configured to support at least a portion of the edge portion of the sub-plate when the position of the edge portion of the sub-plate changes with the distance from the portion of the sub-plate to the support plate.

[0017] According to this embodiment, the sub-plate may have a structure that expands when air is injected into the sub-plate, and the distance control unit may be an air blowing unit configured to inject air into the sub-plate.

[0018] Another embodiment of the present invention provides an electrode assembly manufacturing apparatus.

[0019] Electrode assembly manufacturing apparatus includes:

[0020] An upper plate and a lower plate are configured to press an electrode assembly including a first electrode, a diaphragm, and a second electrode, wherein at least one of the upper plate and the lower plate includes an electrode assembly manufacturing plate according to the above embodiment.

[0021] Another embodiment of the present invention provides an electrode assembly manufacturing apparatus.

[0022] Electrode assembly manufacturing apparatus includes:

[0023] A stacking platform on which an electrode assembly including a first electrode, a diaphragm, and a second electrode is placed;

[0024] First electrode supply unit, configured to supply a first electrode to the stacking stage;

[0025] A second electrode supply unit, configured to supply a second electrode to the stacking stage; and

[0026] A diaphragm supply unit is configured to supply diaphragms to a stacking platform, wherein the stacking platform includes an electrode assembly manufacturing plate according to the above embodiment.

[0027] Another embodiment of the present invention provides a method for manufacturing an electrode assembly.

[0028] The electrode assembly includes a first electrode, a diaphragm, and a second electrode.

[0029] The method includes:

[0030] A stack of components including a first electrode, a diaphragm, and a second electrode is disposed between an upper plate and a lower plate;

[0031] An electrode assembly is formed by pressing the stacked components with at least one of the upper and lower plates; and the electrode assembly is then separated from the upper and lower plates.

[0032] At least one of the upper plate and the lower plate includes the electrode assembly manufacturing plate according to the above embodiment.

[0033] Another embodiment of the present invention provides a method for manufacturing an electrode assembly.

[0034] The electrode assembly includes a first electrode, a diaphragm, and a second electrode.

[0035] The method includes a stacking step of stacking a stack comprising a first electrode, a diaphragm, and a second electrode on a stacking table;

[0036] Electrode assemblies are formed by heating and pressing the stacked components; and

[0037] The electrode assembly is separated from the stacking stage, wherein the stacking stage includes an electrode assembly manufacturing plate according to the above embodiment.

[0038] Beneficial effects

[0039] According to embodiments of the present invention, an electrode assembly manufacturing plate, an electrode assembly manufacturing apparatus including an electrode assembly manufacturing plate, and an electrode assembly manufacturing method including an electrode assembly manufacturing plate, the electrode assembly can be quickly separated from the plate or manufacturing apparatus, which can shorten the manufacturing time of the electrode assembly.

[0040] The electrode assembly manufacturing plate, the electrode assembly manufacturing apparatus including the electrode assembly manufacturing plate, and the electrode assembly manufacturing method including the electrode assembly manufacturing plate according to embodiments of the present invention can prevent damage to the electrode assembly due to adhesion of the electrode assembly, thereby providing the electrode assembly with excellent and uniform performance.

[0041] Therefore, processing efficiency can be improved by shortening manufacturing time and reducing product defects. Attached Figure Description

[0042] Figures 1 to 5 This is a diagram illustrating the structure and operating principle of an electrode assembly manufacturing plate according to an embodiment of the present invention.

[0043] Figure 6 and Figure 7 This is a diagram illustrating an electrode assembly manufacturing apparatus including an electrode assembly manufacturing plate according to an embodiment of the present invention.

[0044] Figure 8 This is an exemplary cross-sectional view of an electrode assembly manufactured by a manufacturing apparatus according to an embodiment of the present invention and having a shape stacked in a zigzag manner.

[0045] [Explanation of reference numbers and symbols]

[0046] 1: Vertical drive unit

[0047] 2, 3: Horizontal drive unit

[0048] 2a, 3a: Elastic members (before tension)

[0049] 2a', 3a': Elastic members (after tension)

[0050] 2b, 3b: Fixtures

[0051] 2c, 3c: Support section

[0052] 2D, 3D: Limiters

[0053] 2e, 3e: Guiding Department

[0054] 5: Support plate

[0055] 6: Sub-board

[0056] 7: Electrode assembly manufacturing board

[0057] 10: Electrode assembly

[0058] 11: First electrode

[0059] 12: Second electrode

[0060] 14: Diaphragm

[0061] 20, 100: Electrode assembly manufacturing equipment

[0062] 21: On the board

[0063] 22: Lower board

[0064] 110: Stacking Platform

[0065] 120: Diaphragm Supply Department

[0066] 121: Diaphragm heating section

[0067] 122: Diaphragm reel

[0068] 131: First electrode accommodating portion

[0069] 141: Second electrode housing portion

[0070] 150: First Electrode Supply Section

[0071] 151: First suction head

[0072] 153: First Moving Unit

[0073] 160: Second Electrode Supply Section

[0074] 161: Second suction head

[0075] 163: Second Moving Section

[0076] T: Protruding part

[0077] h: Height of the protruding part

[0078] q: Spacing between protruding parts

[0079] M: Middle part Detailed Implementation

[0080] The present invention will now be described in detail to enable those skilled in the art to readily implement it. However, the invention can be implemented in various different ways and is not limited to the embodiments described herein.

[0081] For ease of description, the dimensions and thicknesses of each component shown in the accompanying drawings are arbitrarily depicted, but the invention is not limited thereto.

[0082] Throughout this specification, unless otherwise expressly stated, the words “comprising” or “including” and variations thereof (such as “including” or “containing”) mean to further include the said constituent elements without excluding any other constituent elements.

[0083] In this specification, the term "part" refers to a joint that performs a specific function in an electrode assembly manufacturing apparatus.

[0084] In this specification, when a component is described as positioned "above" or "on" another component, the component may be positioned "directly" on the other component, and a component may also be positioned on the other component with other components interposed between them. Conversely, when a component is described as being "directly" on another component, there are no components between them. Furthermore, when a component is described as being located "above" or "on" a reference portion, the component may be located "above" or "below" the reference portion, and this configuration does not necessarily mean that the component is located "above" or "on" the reference portion in a direction opposite to gravity.

[0085] In the following description of the invention, a detailed description of the well-known related technologies will be omitted when it is determined that such a description may unnecessarily obscure the subject matter of the invention.

[0086] <Electrode Assembly Manufacturing Board>

[0087] The electrode assembly manufacturing plate according to the present invention is characterized in that it includes a support plate and a sub-plate disposed on one surface of the support plate, and further includes a distance control unit.

[0088] The distance control unit is used to push a portion of the opposite surface of the sub-plate, which is opposite to the support plate, away from the support plate, such that the distance from said portion of the opposite surface to the support plate is different from the distance from the remaining portion to the support plate. In this case, the entire sub-plate can be pushed away from the support plate. Alternatively, only the opposite surface of the sub-plate (i.e., only a portion of the top surface of the sub-plate) can be pushed away from the support plate. Through the action of the distance control unit, the opposite surface of the sub-plate has a non-flat structure, thereby reducing the contact area of ​​the electrode assembly disposed on the sub-plate with respect to the sub-plate, and allowing the electrode assembly to be easily separated from the sub-plate. Therefore, processing time can be shortened and damage to the electrode assembly can be prevented.

[0089] The subplate is detachably mounted on the support plate. Because the subplate is separate from the support plate, it is not only used as described above for easy separation of the electrode assembly, but is also configured to be replaceable by separation from the electrode assembly manufacturing plate when necessary (such as when the subplate ages or becomes contaminated).

[0090] The sub-plate can be made of a flexible material such that at least one surface of it can be reversibly transformed from a flat state to a non-flat state via a distance control unit. For example, the sub-plate can be a polymer sheet. The sub-plate made of a flexible material (such as a polymer sheet) exists in a flat state during stacking, pressing, and / or heating processes used to manufacture the electrode assembly and does not impede the processes. When the electrode assembly is separated from the sub-plate after the processes are performed, the sub-plate is transformed into a non-flat state via the distance control unit, allowing the electrode assembly to be quickly separated from the support plate without damage.

[0091] There are no special restrictions on the thickness or material of the sub-sheet, as long as it does not impede the functional performance of the aforementioned treatment. For example, the sub-sheet can be a polymer sheet without particular restriction, as long as it does not damage the sub-sheet under the pressure and temperature conditions applied during the pressing and heating processes. For example, the thickness of the polymer sheet can be from 100 μm to 160 μm, particularly from 110 μm to 150 μm. For example, the polymer sheet can include fluoropolymers. More specifically, the polymer sheet can be made of fluoropolymers. For example, the polymer sheet can include polytetrafluoroethylene (PTFE). More specifically, the polymer sheet can be made of polytetrafluoroethylene, also known as Teflon.

[0092] The material or structure of the support plate is not limited, as long as it possesses the properties required for the processing of the electrode assembly. For example, the support plate may include a metal layer disposed on a surface opposite the sub-plate, or the entire support plate may be a metal layer. The metal layer may include aluminum or stainless steel. The stainless steel may be STS or SUS. For example, the surface of the metal layer may be made of aluminum. More specifically, the metal layer may be made of aluminum. The support plate may consist only of the metal layer. If necessary, the support plate may include additional support layers that support the metal layer.

[0093] Figure 1 The structure and operating principle of the electrode assembly manufacturing plate 7 according to the first embodiment are shown. Figure 1 (a) is the top view of plate 7. Figure 1 (b) is a side view of plate 7. According to... Figure 1 The distance control unit is a vertical drive unit 1, which is configured to support a portion of the sub-plate 6 and move vertically relative to a surface of the support plate 5. The vertical drive unit 1 supports a portion of the sub-plate 6 and is positioned such that the sub-plate 6 exists in a flat state during stacking, pressing, and / or heating processes, as... Figure 1 (a) and Figure 1 As shown in the left figure of (b). Figure 1 (a) and Figure 1As shown in the right figure of (b), after processing, the portion of the sub-plate 6 is pushed away from the support plate 5, causing the sub-plate 6 to become non-flat.

[0094] The vertical movement distance of the vertical drive unit 1 can be designed to allow the electrode assembly located on the sub-plate 6 to be easily separated. The vertical movement distance of the vertical drive unit 1 can be determined taking into account the size of the electrode assembly and the sub-plate 6, the contact area, the material of the contact parts, etc. For example, the vertical drive unit 1 can move to a height of 0.1 mm to 100 mm above the support plate 5.

[0095] The operation method of the vertical drive unit 1 is not particularly limited, as long as the vertical drive unit 1 can be used to push the sub-plate away from the support plate 5 and return it to its original position through the above-described vertical movement. For example, various methods selected from using cylinders, servo motors, etc., can be applied to the vertical drive unit 1.

[0096] according to Figure 1 The vertical drive unit 1 supports the middle portion spaced apart from any pair of opposite edge portions of the subplate 6. When needed, the middle portion can support the center portion spaced equidistant from any pair of opposite edge portions of the subplate 6. In this case, by moving the vertical drive unit 1, the electrode assembly disposed on the subplate 6 can be stably separated from the subplate 6 without being separated to an unexpected position.

[0097] The position and number of vertical drive units 1 can be selected as needed. For example, the position of the vertical drive unit 1 can be near the edge rather than in the middle. Alternatively, only one vertical drive unit 1 can be provided, or two or more vertical drive units 1 can be provided.

[0098] The length and area of ​​the support sub-plate 6 of the vertical drive unit 1 can be designed, as described above, to achieve a non-flat state for the sub-plate 6. For example... Figure 1As shown, the vertical drive unit 1 can be designed to support 100% of the total width of the sub-plate 6. For example, the vertical drive unit 1 can be configured to support 50% or more of the width of the sub-plate, or the vertical drive unit 1 can have a strip configured to support 90% or more of the width of the sub-plate. In this case, if one surface of the sub-plate has a quadrilateral shape, the width of the sub-plate refers to the shorter distance between the opposite sides of the quadrilateral shape. If one surface of the sub-plate has a quadrilateral shape, the length of the sub-plate refers to the longer distance along the opposite sides of the quadrilateral shape. Furthermore, 1% or more (e.g., 3% or more, 5% or more, or 10% or more) of the area of ​​the sub-plate 6 adjacent to the electrode assembly can be supported by the vertical drive unit 1. 90% or less (e.g., 70% or less, or 50% or less) of the area of ​​the sub-plate 6 adjacent to the electrode assembly can be supported by the vertical drive unit 1.

[0099] Having a flat surface on the support sub-plate 6 of the vertical drive unit 1 helps prevent separation of the electrode assembly positioned on the sub-plate 6, even during operation of the vertical drive unit 1. However, at least part or all of the surface of the support sub-plate 6 of the vertical drive unit 1 can be made curved, as long as it does not cause accidental separation of the electrode assembly depending on the movement height or support area of ​​the vertical drive unit 1. When at least a portion of the support sub-plate 6 on the surface of the vertical drive unit 1 is curved, damage or stretching of the sub-plate 6 or the electrode assembly can be prevented during operation of the vertical drive unit 1 during this process.

[0100] According to this embodiment, the electrode assembly manufacturing plate further includes an auxiliary support unit configured to support at least a portion of the edge portion of the sub-plate. The auxiliary support unit is disposed on the support plate and supports at least a portion of the edge portion of the sub-plate even when the position of the edge portion of the sub-plate changes due to variations in the distance from the portion of the sub-plate to the support plate. The support area of ​​the auxiliary support unit supporting the sub-plate can be determined as needed. For example, the support area of ​​the auxiliary support unit can be smaller than the support area of ​​the vertical drive unit supporting the sub-plate. The auxiliary support unit and the edge portion of the sub-plate can be fixed. The auxiliary support unit and the edge portion of the sub-plate can be fixed by retaining members, connecting members, or adhesive members.

[0101] according to Figure 1 The auxiliary support units are horizontal drive units 2 and 3 configured to move horizontally relative to a surface of the support plate. When the vertical drive unit 1 pushes open the sub-plate 6 and forms a non-flat state, the edge portion of the sub-plate 6 moves toward the vertical drive unit 1. Specifically, as... Figure 1As shown in (b), since the top surfaces of the vertical drive unit 1 and the horizontal drive units 2 and 3 have the same height before the vertical drive unit 1 and the horizontal drive units 2 and 3 are operated, the sub-plate 6 supported by the vertical drive unit 1 and the horizontal drive units 2 and 3 remains in a flat state.

[0102] When the vertical drive unit 1 moves vertically, the height of the portion supported by the vertical drive unit 1 and the height of the portions supported by the horizontal drive units 2 and 3 change, causing the sub-plate 6 to enter a non-flat state. This non-flat state makes it easier to separate the electrode assembly located on the sub-plate 6. In this case, since the edge portion of the sub-plate 6 moves towards the vertical drive unit 1, the horizontal drive units 2 and 3 also move horizontally towards the vertical drive unit 1. Because the auxiliary support unit moves horizontally as described above, it is possible to prevent damage or stretching of the sub-plate supported by the auxiliary support unit, and to prevent accidental separation of the electrode assembly provided on the sub-plate.

[0103] For example, horizontal drive units 2 and 3 can be connected to support plate 5 via a track structure and configured to move horizontally. The horizontal drive units can be motors, cylinders, elastic components, etc.

[0104] For example, the auxiliary support unit may include an elastic member capable of reversibly changing its length or shape to achieve horizontal operation. Even if the position of the edge portion of the sub-plate 6 fixed to the auxiliary support unit changes, the auxiliary support unit can still support the edge portion of the sub-plate 6 if the length of the auxiliary support unit increases or the shape of the auxiliary support unit is tilted or bent.

[0105] according to Figure 2 The elastic component is a spring component. Figure 2 (a) is the top view of plate 7. Figure 2 (b) is a side view of plate 7. For example... Figure 2 As shown on the right, even if the subplate becomes non-flat and the edge portion moves, the spring member can support the edge portion of the subplate 6 by operating horizontally while extending or tilting.

[0106] in addition, Figure 3 An exemplary structure is shown in which elastic members 2a' and 3a' are configured to adjust the distance in the horizontal direction. When the sub-plate 6 is pushed away from the support plate 5, the lengths of the elastic members 2a' and 3a' increase, as... Figure 3 As shown on the lower side, this allows the edge portion of sub-plate 6 to still be supported.

[0107] according to Figure 3In addition to the elastic members 2a and 3a, the auxiliary support unit may also include clamps 2b and 3b configured to fix the edge portion of the sub-plate 6, and guide portions 2e and 3e configured to guide the horizontal position of the clamps 2b and 3b according to the length changes of the elastic members 2a and 3a. The clamps 2b and 3b can serve as connections between the edge portion of the sub-plate 6 and the elastic members 2a and 3a. The clamps 2b and 3b may include clamps configured to fix the sub-plate by fastening. The guide portions 2e and 3e may include track structures configured to move the clamps 2b and 3b horizontally. If necessary, the auxiliary support unit may also include supports 2c and 3c configured to fix the elastic members 2a and 3a, and / or limiters 2d and 3d configured to limit the minimum length of the elastic members 2a and 3a. The supports 2c and 3c may also be used to change their position to adjust the tension of the sub-plate according to the length changes of the elastic members 2a and 3a.

[0108] The number of auxiliary support units can be selected based on the shape or size of the auxiliary support units and the shape or size of the sub-plate. For example, in the case where the sub-plate has a quadrilateral shape, four horizontal drive units 2 and 3 can be provided to support the four edge portions of the sub-plate, such as... Figure 1 and Figure 2 As shown. As another example, if the length of the edge portion of the sub-plate supported by the strip-shaped auxiliary support unit is 50% or more (e.g., 90% or more) of the length (i.e., the length between two adjacent edges), two auxiliary support units can be provided to support any pair of opposite edge portions of the sub-plate (not shown).

[0109] Figure 4 and Figure 5 The structure and operating principle of an electrode assembly manufacturing plate according to the second embodiment are illustrated by way of example. Figure 4 and Figure 5 An exemplary structure of sub-plate 6 is shown, which is configured to expand when air is injected into the structure of sub-plate 6. In this case, the distance control unit (not shown) is an air blowing unit configured to inject air into the sub-plate.

[0110] The air blowing unit can push the opposite surface of the sub-plate from the support plate. The sub-plate may have a hollow air tube shape capable of containing air and is made of a flexible material (specifically, silicone rubber), allowing the sub-plate to be transformed into a non-flat state by the air blowing unit. As described above, the sub-plate has an air inlet for injecting air, and the air blowing unit may include an air supply section connected to and configured to supply air to the air inlet of the sub-plate.

[0111] For example, one surface of the sub-plate is fixed to the support plate. When air is injected into the sub-plate, a portion of the other surface of the sub-plate is configured to expand, such that the distance from that portion of the other surface of the sub-plate to the support plate differs from the rest. There are no particular limitations on the method of fixing the sub-plate to the support plate. However, physical connection methods such as bolted connections can be used.

[0112] For example, such as Figure 4 As shown, the sub-plate has an airflow path with a specific pattern, and therefore a structure in which, when air is injected into the sub-plate, two or more protrusions T corresponding to the airflow path and spaced apart from each other expand. Furthermore, as... Figure 5 As shown, the subplate can have a structure configured to expand when air is injected into it, such that the middle portion M, spaced apart from any pair of opposite edge portions of the other surface of the subplate, is positioned at a greater distance from the support plate than the rest of the portion.

[0113] The height h of the protruding portion T can be from 0.5 mm to 1.5 mm, particularly from 0.8 mm to 1.2 mm. (Refer to...) Figure 4 The height h of the protruding portion T refers to the distance between the unexpanded portion of the subplate and the portion of the subplate that expands to its maximum extent in the vertical direction when the subplate is inflated by the air blowing unit. As the height of the protruding portion T increases, the contact between the subplate and the electrode assembly changes from surface contact to line contact, making it easier to separate the electrode assembly without damaging the subplate or the electrode assembly.

[0114] The height h of the protruding part T can be 3 to 15 times the thickness of the sub-plate, especially 5 to 12 times.

[0115] When the height of the protruding portion is within a certain range, damage to the sub-plate or electrode assembly can be prevented during the process.

[0116] The shape of the protrusion is not limited. The case where at least a portion of the protrusion is a curved surface (specifically, the case where at least a portion in contact with the electrode assembly is a curved surface) can help prevent damage to the sub-plate or the electrode assembly.

[0117] The shapes of two or more protruding parts T can be the same or different from each other, especially the same.

[0118] The spacing q between two or more protrusions can be defined to allow the electrode assembly to be easily separated from the daughter plate. For example, the spacing q between two or more protrusions can be from 0.5 cm to 2.5 cm, particularly from 1 cm to 2 cm. (See reference...) Figure 4The interval q between the protrusions T refers to the distance between two protrusions, that is, the distance from one point (i.e., the end of any protrusion) to the point where the next protrusion begins to protrude.

[0119] When the spacing between the protruding parts is within a certain range, damage to the sub-plate or electrode assembly can be prevented during the process.

[0120] When there are three or more protrusions, the intervals between the protrusions can be equal or different from each other, especially equal.

[0121] like Figure 4 As shown, in the case of a structure where the sub-plate has two or more protruding portions T spaced apart from each other and expanded, there is a structure where the expansion is such that the middle portion M of the sub-plate is positioned at a greater distance from the support plate than the rest of the portion (e.g., Figure 5 Compared to (as shown), the time it takes for air to be injected into or discharged from the flow path can be reduced, and the processing time can be shortened.

[0122] In addition, Figure 4 When the structure has two or more protrusions, the electrode assembly can be stably supported by multiple protrusions while air is injected or vented. This prevents the orientation of the electrode assembly from being distorted during the process of preventing electrode assembly adhesion, compared to when the electrode assembly is supported by only one protrusion. When using a device that only conveys the electrode assembly to a predetermined route, the position of the electrode assembly remains unchanged.

[0123] If necessary, a second sub-plate can be additionally disposed on the opposite surface of the sub-plate to the surface opposite to the support plate. The second sub-plate can be a polymer sheet.

[0124] The air supply unit is not particularly restricted, as long as it can supply air. The air supply unit can adjust the air volume or pressure as needed. The distance from the portion of the opposite surface of the subplate to the support plate can be adjusted by the amount or pressure of air blown by the air blowing unit.

[0125] <Electrode Assembly Manufacturing Equipment>

[0126] The aforementioned electrode assembly manufacturing plate can be used in an electrode assembly manufacturing apparatus.

[0127] An electrode assembly manufacturing apparatus according to an embodiment of the present invention is characterized in that it includes an upper plate and a lower plate configured to press an electrode assembly, and at least one of the upper plate and the lower plate includes an electrode assembly manufacturing plate according to the above embodiment.

[0128] An electrode assembly manufacturing apparatus according to an embodiment of the present invention may include an upper plate and a lower plate configured to press an electrode assembly, and at least one of the upper plate and the lower plate may include an electrode assembly manufacturing plate according to the above embodiment.

[0129] The electrode assembly is positioned between the upper plate and the lower plate, and the sub-plate included in the upper or lower plate is positioned opposite the electrode assembly.

[0130] The electrode assembly manufacturing apparatus may include a heater configured to heat the electrode assembly before or during pressing. At least one of the upper plate and the lower plate may include a heater configured to heat the electrode assembly before or during pressing.

[0131] After pressing the electrode assembly using the upper and lower plates, the electrode assembly can be separated by operating the distance control unit when needed, after pressing and heating the electrode assembly.

[0132] The upper plate only, the lower plate only, or both the upper and lower plates can be electrode assembly manufacturing plates according to the above embodiments. During the electrode assembly manufacturing process, which includes pressing and / or heating, the electrode assembly may adhere to the upper and / or lower plates. However, the plates described above according to embodiments of the present invention can be used to effectively prevent the adhesion of the electrode assembly. Therefore, processing efficiency can be improved and superior electrode assemblies can be provided.

[0133] Figure 6 A manufacturing apparatus 20 is shown, comprising an electrode assembly manufacturing plate according to an embodiment of the present invention as an upper plate 21 and a lower plate 22. The upper plate 21 moves toward the lower plate 22 and presses the electrode assembly 10 placed on the lower plate. In this case, the electrode assembly 10 can be heated by a heater (not shown). The heater can heat the electrode assembly 10 by increasing the temperature of the upper plate 21 and / or the lower plate 22 or by increasing the temperature of the processing environment. Subsequently, as the upper plate 21 moves away from the lower plate 22, a vertical drive unit 1, acting as a distance control unit, moves in the direction that pushes the sub-plate 6 away from the support plate, such that the sub-plate 6 pushes the electrode assembly 10 away. In this case, horizontal drive units 2 and 3 move toward the vertical drive unit 1 according to the degree of movement of the vertical drive unit 1, such that even if the position of the edge portion of the sub-plate 6 changes, the horizontal drive units 2 and 3 can support the edge portion of the sub-plate 6 without damaging the sub-plate 6. Therefore, it is possible to effectively prevent the electrode assembly from adhering to the upper plate and / or the lower plate.

[0134] Figure 6 An apparatus is shown in which both the upper and lower plates are electrode assembly manufacturing plates according to an embodiment of the present invention. However, an apparatus in which only either the upper or lower plate is an electrode assembly manufacturing plate according to an embodiment of the present invention can operate in the same manner. Figure 6 It shows the use of Figure 1 The plate manufacturing apparatus is shown as an example. However, Figures 2 to 5 The plate shown can be applied to the manufacturing apparatus in the same manner.

[0135] When both the upper and lower plates are electrode assembly manufacturing plates according to embodiments of the present invention, the structures of the upper and lower plates may be the same or different. For example, the number of vertical drive units 1 provided on the upper plate and the number of vertical drive units 1 provided on the lower plate may be equal or different. For example, the upper plate may have one vertical drive unit 1, and the lower plate may have two vertical drive units 1, or vice versa.

[0136] An electrode assembly manufacturing apparatus according to another embodiment of the present invention is characterized by comprising: a stacking stage on which an electrode assembly is placed; a first electrode supply unit configured to supply a first electrode to the stacking stage; a second electrode supply unit configured to supply a second electrode to the stacking stage; and a diaphragm supply unit configured to supply a diaphragm to the stacking stage, wherein the stacking stage includes an electrode assembly manufacturing plate according to the above embodiment.

[0137] An electrode assembly manufacturing apparatus according to another embodiment of the present invention is characterized by comprising: a stacking platform on which an electrode assembly is placed; a first electrode supply unit configured to supply a first electrode to the stacking platform; a second electrode supply unit configured to supply a second electrode to the stacking platform; and a diaphragm supply unit configured to supply a diaphragm to the stacking platform, wherein the stacking platform is an electrode assembly manufacturing plate according to the above embodiment.

[0138] Electrode assemblies are manufactured by stacking a first electrode, a diaphragm, and a second electrode on a sub-board of an electrode assembly manufacturing board. After the electrode assemblies on the stacking stage have been fully stacked, the electrode assemblies are separated by operating a distance control unit.

[0139] Electrode assembly manufacturing apparatus may include a heater configured to heat the electrode assemblies during or after processing the stacked electrode assemblies. A stacking stage may include a heater configured to heat the electrode assemblies during or after processing the stacked electrode assemblies.

[0140] Figure 7 An electrode assembly manufacturing apparatus 100 is shown, which includes a stacking stage 110, a first electrode supply unit 150, a second electrode supply unit 160, and a diaphragm supply unit 120.

[0141] The diaphragm supply unit 120 may include a diaphragm heating unit 121 and a diaphragm roll 122. The diaphragm heating unit 121 may be selectively applied.

[0142] The first electrode supply unit 150 delivers the first electrode placed on the first electrode receiving portion 131 to the stacking table and stacks the first electrodes. The first electrode supply unit 150 may include: a first suction head 151 configured to vacuum suction the first electrode 11 placed on the first electrode receiving portion 131; and a first moving part 153 configured to move the first electrode 11 to the stacking table 110.

[0143] The second electrode supply unit 160 delivers the second electrode placed on the second electrode receiving portion 141 to the stacking table and stacks the second electrodes. The second electrode supply unit 160 may include: a second suction head 161 configured to vacuum suction the second electrode 12 placed on the second electrode receiving portion 141; and a second moving part 163 configured to move the second electrode 12 to the stacking table 110.

[0144] For example, stacking platform 110 can Figure 7 Rotate in the direction of the arrow shown. In this case, the first electrode supply unit 150 and the second electrode supply unit 160 can rotate in the direction of the arrow and supply the first electrode and the second electrode to the stacking platform 110. In particular, in this case, since the stacking platform can also have a plate shape on which stacked components can be placed, the stacking platform can also be a platform including the separable sub-plate of the present invention.

[0145] The electrode assembly manufacturing apparatus 100 may include a heater (not shown) configured to heat a first electrode 11 placed on a first electrode receiving portion 131 and / or a second electrode 12 placed on a second electrode receiving portion 141. The heater can heat the first and / or second electrodes by increasing the temperature of the first electrode receiving portion 131 and / or the second electrode receiving portion 141 or by increasing the temperature of the processing environment. When using the electrode assembly manufacturing plate according to the invention as a stacking platform, based on reference... Figures 1 to 4 The principle described is that, after the stacking process is completed, the electrode assembly can be easily separated from the stacking platform.

[0146] In addition to the configuration including the electrode assembly manufacturing plate according to the invention as a stacking platform or upper and / or lower plate, the electrode assembly manufacturing apparatus according to embodiments of the invention may also include components commonly used in the art.

[0147] An electrode assembly manufactured by an electrode assembly manufacturing apparatus according to an embodiment of the present invention may include a first electrode, a diaphragm, and a second electrode, and has a structure in which the first electrode, the diaphragm, and the second electrode are stacked in a Z-shape.

[0148] In this specification, the process of stacking the first and second electrodes by alternately placing the first and second electrodes between diaphragms 14 folded in a Z-shape is referred to as Z-shaped stacking. Specifically, the diaphragms are stacked in a Z-shape, folded so that the diaphragms are alternately arranged on the left and right sides of the stacking axis based on the stacking axis. Furthermore, the first and second electrodes are alternately arranged and stacked between the stacked diaphragms. In this case, the stacking axis refers to the axis parallel to the direction of the stacking of the first electrode, diaphragms, and second electrode. The stacking axis is an imaginary axis passing through the center of the stack, where the electrodes and diaphragms are stacked.

[0149] The configuration in which the first and second electrodes are alternately disposed between the diaphragms means that the diaphragms are stacked along the direction of the stacking axis, while overlapping each other in a zigzag manner, and the first and second electrodes are alternately stacked one after another in the space (between the diaphragms) defined when the diaphragms overlap each other.

[0150] according to Figure 8 The electrode assembly 10, stacked in a Z-shape, is a power generation element capable of being charged or discharged. The electrode assembly 10 can be provided in a configuration where a first electrode 11, a diaphragm 14, and a second electrode 12 are alternately stacked and connected. In this case, the electrode assembly 10 is arranged with the diaphragm 14 folded in a Z-shape, and the first electrode 11 and the second electrode 12 are alternately disposed between the folded diaphragms 14. The first electrode is a positive electrode, and the second electrode is a negative electrode. Alternatively, the first electrode is a negative electrode, and the second electrode is a positive electrode.

[0151] A negative electrode is manufactured by applying a negative electrode slurry comprising a negative electrode active material to at least one surface of a negative electrode current collector and drying the negative electrode slurry. The negative electrode slurry may also include additional components, such as conductive materials, binders, and solvents, as needed. A positive electrode is manufactured by applying a positive electrode slurry comprising a positive electrode active material to at least one surface of a positive electrode current collector and drying the positive electrode slurry. The positive electrode slurry may also include additional components, such as conductive materials, binders, and solvents, as needed. The separator may include a porous polymer substrate and an organic / inorganic composite porous coating formed on at least one side surface of the polymer substrate. The organic / inorganic composite porous coating may include a particulate binder resin and inorganic particles. The negative electrode active material, positive electrode active material, additional components, type of separator, and method of manufacturing the positive and negative electrodes can be used without limitation, provided that the aforementioned components are known in the art within the scope of the above description.

[0152] <Electrode Assembly Manufacturing Method>

[0153] Embodiments of the present invention provide a method for manufacturing an electrode assembly including a first electrode, a diaphragm, and a second electrode using the electrode assembly manufacturing plate of the present invention.

[0154] An electrode assembly manufacturing method according to an embodiment of the present invention is a method for manufacturing an electrode assembly including a first electrode, a diaphragm, and a second electrode, and includes: disposing a stack including the first electrode, the diaphragm, and the second electrode between an upper plate and a lower plate; pressing the stack to form an electrode assembly by moving at least one of the upper plate and the lower plate; and separating the electrode assembly from the upper plate and the lower plate, wherein at least one of the upper plate and the lower plate includes an electrode assembly manufacturing plate according to the embodiment.

[0155] An electrode assembly manufacturing method according to an embodiment of the present invention is a method for manufacturing an electrode assembly including a first electrode, a diaphragm, and a second electrode, and includes: disposing a stack including the first electrode, the diaphragm, and the second electrode between an upper plate and a lower plate; pressing the stack to form an electrode assembly by moving at least one of the upper plate and the lower plate; and separating the electrode assembly from the upper plate and the lower plate, wherein at least one of the upper plate and the lower plate may be an electrode assembly manufacturing plate according to the embodiment.

[0156] A stack comprising a first electrode, a diaphragm, and a second electrode is positioned between an upper plate and a lower plate, and a sub-plate comprising a portion of the upper or lower plate is positioned opposite the stack. Subsequently, the upper plate presses down on the fully positioned stack as it moves toward the lower plate, thereby forming an electrode assembly.

[0157] Pressing the stack can include pressing the electrode assembly for 5 to 60 seconds under temperature conditions of 50°C to 90°C and pressure conditions of 0.5 MPa to 6.0 MPa. More specifically, the stack can be heated and pressed for 5 to 30 seconds under temperature conditions of 65°C to 90°C and pressure conditions of 1.0 MPa to 6.0 MPa. More specifically, the stack can be heated and pressed for 7 to 25 seconds under temperature conditions of 65°C to 85°C and pressure conditions of 3 MPa to 5.5 MPa.

[0158] During the heating and pressing process, the bonding force between the first electrode and the diaphragm, and between the diaphragm and the second electrode, can be improved without damaging the first electrode, the diaphragm, and the second electrode. Therefore, the performance of electrode assemblies manufactured by pressing stacks can be improved.

[0159] In embodiments of the invention, forming an electrode assembly by pressing the stacked members by moving at least one of the upper and lower plates may further include heating at least one of the upper and lower plates before or during pressing the electrode assembly by using a heater (not shown) configured to heat the electrode assembly.

[0160] The heater may be included in at least one of the upper and lower plates, or it may be provided as a separate component.

[0161] By separating the electrode assembly from the upper and lower plates, the electrode assembly, which has been fully pressed, is separated while in contact with the upper and lower plates.

[0162] In this case, since at least one of the upper plate and the lower plate is used as the manufacturing plate for the aforementioned electrode assembly, it is possible to effectively prevent the electrode assembly from adhering to the upper plate and / or the lower plate.

[0163] In an embodiment of the invention, separation of the electrode assembly from the upper and lower plates may include, by operation of a distance control unit, pushing a portion of the opposite surface of the subplate to the support plate from the support plate, such that the distance from said portion of the opposite surface to the support plate is different from the distance from the remaining portion to the support plate.

[0164] Specifically, when the upper plate 21 moves away from the lower plate 22, the vertical drive unit 1, which acts as a distance control unit, moves in the direction that pushes the sub-plate 6 away from the support plate, causing the sub-plate 6 to push away the electrode assembly 10. In this case, the horizontal drive units 2 and 3 move toward the vertical drive unit 1 according to the degree of movement of the vertical drive unit 1, so that even if the position of the edge portion of the sub-plate 6 changes, the horizontal drive units 2 and 3 can support the edge portion of the sub-plate 6 without damaging the sub-plate 6.

[0165] An electrode assembly manufacturing method according to an embodiment of the present invention is a method for manufacturing an electrode assembly including a first electrode, a diaphragm, and a second electrode, and includes: a stacking step of stacking a stack including the first electrode, the diaphragm, and the second electrode on a stacking platform; forming an electrode assembly by heating and pressing the stack; and separating the electrode assembly from the stacking platform, wherein the stacking platform includes an electrode assembly manufacturing plate according to the embodiment.

[0166] An electrode assembly manufacturing method according to an embodiment of the present invention is a method for manufacturing an electrode assembly including a first electrode, a diaphragm, and a second electrode, and includes: a stacking step of stacking a stack including the first electrode, the diaphragm, and the second electrode on a stacking platform; forming an electrode assembly by heating and pressing the stack; and separating the electrode assembly from the stacking platform, wherein the stacking platform may be an electrode assembly manufacturing plate according to an embodiment.

[0167] In embodiments of the present invention, the stacking step may include: supplying a first electrode to the stacking platform; supplying a second electrode to the stacking platform; and supplying a diaphragm to the stacking platform.

[0168] Forming an electrode assembly by heating and pressing the stacked components can also include performing the operation using a lower plate, the lower plate being configured to apply heat and configured such that the electrode assembly to be heated and pressed is placed on the lower plate and a corresponding upper plate and configured to apply heat. The lower plate and the upper plate can be a pair of pressing blocks.

[0169] Forming an electrode assembly by heating and pressing the stack can include heating and pressing the stack in the direction of the stack axis. Alternatively, the heating and pressing of the stack can be performed by a pressing heater, as described below.

[0170] Furthermore, in embodiments of the present invention, heating and pressing of the stacked components may include: moving the stacked components between a pair of pressing blocks including a pressing heater; surface pressing the stacked components by moving the pair of pressing blocks in the direction of the stack axis; and heating the stacked components.

[0171] A pair of pressing blocks can be a lower plate and an upper plate facing the lower plate.

[0172] Furthermore, in embodiments of the present invention, forming an electrode assembly by heating and pressing the stack may include: moving the stack between a pair of pressing blocks; surface pressing the stack by moving the pair of pressing blocks in the direction of the stack axis; and heating the stack by a separately provided pressing heater.

[0173] In other words, the press heater can be included in the press block or provided as a separate component.

[0174] The electrode assembly manufacturing method according to an embodiment of the present invention may further include releasing the clamp before the heating and pressing step.

[0175] In other words, releasing the clamp may include stopping the operation of pressing the upper surface of the stack by the clamp and spacing the clamp away from the stack.

[0176] Furthermore, when forming an electrode assembly by heating and pressing the stack, moving the stack between a pair of pressing blocks including a pressing heater can include not only moving the stack, but also moving the stack together with the stack while it is placed on the stacking platform. In this case, the objects heated and pressed by the pair of pressing blocks and the pressing heater can refer to both the stack and the stacking platform.

[0177] In embodiments of the present invention, forming an electrode assembly by heating and pressing the stacked components may include heating and pressing the stacked components for 5 to 60 seconds at a temperature of 50°C to 90°C and a pressure of 0.5 MPa to 6.0 MPa. More specifically, the stacked components may be heated and pressed for 5 to 30 seconds at a temperature of 65°C to 90°C and a pressure of 1.0 MPa to 6.0 MPa. More specifically, the stacked components may be heated and pressed for 7 to 25 seconds at a temperature of 65°C to 85°C and a pressure of 3 MPa to 5.5 MPa.

[0178] During the appropriate heat treatment and pressing process, the bonding force between the first electrode and the diaphragm, and between the diaphragm and the second electrode, can be improved without damaging the first electrode, the diaphragm, and the second electrode. Therefore, the performance of the electrode assembly can be improved.

[0179] By separating the electrode assembly from the stack, the fully pressed electrode assembly is separated while it is in contact with the stack.

[0180] In this case, since the aforementioned electrode assembly manufacturing plate is used as a stacking platform, it is possible to effectively prevent the electrode assembly from adhering to the stacking platform.

[0181] In an embodiment of the invention, separation of the electrode assembly from the stack can include pushing a portion of the opposite surface of the sub-plate to the support plate away from the support plate by operation of a distance control unit, such that the distance from said portion of the opposite surface to the support plate is different from the distance from the remaining portion to the support plate.

[0182] When the electrode assembly manufacturing plate according to the invention is used as a stacking platform, based on reference... Figures 1 to 4 The principle described is that, after the stacking process is completed, the electrode assembly can be easily separated from the stacking platform.

[0183] Although embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes can be made without departing from the spirit of the present invention.

Claims

1. An electrode assembly manufacturing plate, the electrode assembly manufacturing plate comprising: Support plate; Sub-plate, the sub-plate being disposed on one surface of the support plate; as well as A distance control unit is disposed on the support plate and configured to push a portion of the opposite surface of the subplate from the support plate such that the distance from the portion of the opposite surface to the support plate is different from the distance from the remaining portion to the support plate.

2. The electrode assembly manufacturing plate according to claim 1, wherein, The sub-plate is made of a flexible material, such that at least one surface of the sub-plate can be reversibly transformed from a flat state to a non-flat state by the distance control unit.

3. The electrode assembly manufacturing plate according to claim 1, wherein, The sub-board is a polymer sheet.

4. The electrode assembly manufacturing plate according to claim 1, wherein, The distance control unit is a vertical drive unit, which is configured to support a portion of the sub-plate and move vertically relative to a surface of the support plate.

5. The electrode assembly manufacturing plate according to claim 4, wherein, The vertical drive unit is configured to support the middle portion spaced apart from any pair of opposite edge portions of the sub-plate, and to support 50% or more of the width of the sub-plate.

6. The electrode assembly manufacturing plate according to claim 5, wherein, The vertical drive unit has a strip shape, which is configured to support a middle portion spaced apart from a pair of opposing edge portions of the subplate and to support 90% or more of the width of the subplate.

7. The electrode assembly manufacturing plate according to claim 5, wherein the electrode assembly manufacturing plate further comprises: An auxiliary support unit is disposed on the support plate and configured to support at least a portion of the edge portion of the sub-plate when the position of the edge portion of the sub-plate changes due to the distance between the portion of the sub-plate and the support plate.

8. The electrode assembly manufacturing plate according to claim 7, wherein, The auxiliary support unit is a horizontal drive unit, which is configured to move in a horizontal direction relative to a surface of the support plate.

9. The electrode assembly manufacturing plate according to claim 7, wherein, The auxiliary support unit includes an elastic member whose length or shape can be reversibly changed.

10. The electrode assembly manufacturing plate according to claim 9, wherein, The elastic component is a spring component.

11. The electrode assembly manufacturing plate according to claim 7, wherein the electrode assembly manufacturing plate comprises: Four auxiliary support units are configured to support the four edge portions of the sub-plate, respectively.

12. The electrode assembly manufacturing plate according to claim 1, wherein, The subplate has a structure that expands when air is injected into it, and the distance control unit is a blowing unit configured to inject air into the subplate.

13. The electrode assembly manufacturing plate according to claim 12, wherein, The subplate has an air injection port, and the air blowing unit includes an air supply section connected to the air injection port of the subplate and configured to supply air.

14. The electrode assembly manufacturing plate according to claim 12, wherein, One surface of the sub-plate is fixed to the support plate, and When air is injected into the sub-plate, a portion of the other surface of the sub-plate is configured to expand such that the distance from the other surface of the sub-plate to the support plate is different from the distance from the remaining portion to the support plate.

15. The electrode assembly manufacturing plate according to claim 14, wherein, The subplate has a structure configured to expand when air is injected into it, such that a middle portion spaced apart from any pair of opposite edge portions of the other surface of the subplate is positioned at a greater distance from the support plate than the rest of the portion, or the subplate has a structure in which two or more protruding portions spaced apart from each other on the other surface of the subplate expand.

16. The electrode assembly manufacturing plate according to claim 12, wherein the electrode assembly manufacturing plate further comprises: The second sub-plate is disposed on the opposite surface of the surface of the sub-plate that is opposite to the surface of the support plate.

17. An electrode assembly manufacturing apparatus, the electrode assembly manufacturing apparatus comprising: An upper plate and a lower plate, the upper plate and the lower plate being configured to press an electrode assembly including a first electrode, a diaphragm and a second electrode. Wherein, at least one of the upper plate and the lower plate comprises an electrode assembly manufacturing plate according to any one of claims 1 to 16.

18. The electrode assembly manufacturing apparatus according to claim 17, wherein, At least one of the upper plate and the lower plate includes a heater configured to heat the electrode assembly before or when the electrode assembly is pressed.

19. An electrode assembly manufacturing apparatus, the electrode assembly manufacturing apparatus comprising: A stacking platform on which an electrode assembly including a first electrode, a diaphragm, and a second electrode is placed; A first electrode supply unit is configured to supply the first electrode to the stacking platform; The second electrode supply unit supplies the second electrode to the stacking stage; as well as A diaphragm supply unit, configured to supply the diaphragm to the stacking platform. The stacking platform includes an electrode assembly manufacturing plate according to any one of claims 1 to 16.

20. The electrode assembly manufacturing apparatus according to claim 19, wherein, The stacking platform includes a heater configured to heat the electrode assembly during or after the process of stacking the electrode assembly.

21. A method for manufacturing an electrode assembly, the electrode assembly comprising a first electrode, a diaphragm, and a second electrode, the method comprising the following steps: A stack comprising the first electrode, the diaphragm, and the second electrode is disposed between the upper plate and the lower plate; The electrode assembly is formed by pressing the stack by moving at least one of the upper plate and the lower plate; as well as Separate the electrode assembly from the upper plate and the lower plate. Wherein, at least one of the upper plate and the lower plate comprises an electrode assembly manufacturing plate according to any one of claims 1 to 16.

22. The method for manufacturing an electrode assembly according to claim 21, wherein, Separating the electrode assembly from the upper plate and the lower plate includes: by operating the distance control unit, pushing a portion of the opposite surface of the subplate from the support plate, such that the distance from the portion of the opposite surface to the support plate is different from the distance from the remaining portion to the support plate.

23. A method for manufacturing an electrode assembly, the electrode assembly comprising a first electrode, a diaphragm, and a second electrode, the method comprising the following steps: The stacking step involves stacking a stack comprising the first electrode, the diaphragm, and the second electrode on a stacking platform. The electrode assembly is formed by heating and pressing the stacked components; as well as Separate the electrode assembly from the stacking platform. The stacking platform includes an electrode assembly manufacturing plate according to any one of claims 1 to 16.

24. The method for manufacturing an electrode assembly according to claim 23, wherein, Separating the electrode assembly from the stack includes: by operating the distance control unit, pushing a portion of the opposite surface of the subplate from the support plate such that the distance from the opposite surface portion to the support plate is different from the distance from the remaining portion to the support plate.

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