Electrode plate stacking device and electrode plate stacking method

Abstract

The invention relates to an electrode plate stacking device and an electrode plate stacking method. According to the electrode plate stacking device and the electrode plate stacking method, a diaphragm with a damaged shape is prevented from being stacked on an electrode plate, so that the performance of a battery cell manufactured by the diaphragm is prevented from being reduced.

Description

Technical Field

[0001] The present disclosure relates to an electrode plate stacking device and an electrode plate stacking method, and to an electrode plate stacking device and an electrode plate stacking method for forming an electrode assembly of a battery cell. Background Art

[0002] A secondary battery cell is formed in the form of stacking a positive electrode plate, a separator, and a negative electrode plate and impregnating them with an electrolyte solution, and an electrode assembly included in such a cell is formed by alternately stacking positive and negative electrode plates with separators interposed therebetween.

[0003] Specifically, when the electrode plate supply device supplies the electrode plates composed of the positive electrode plates or the negative electrode plates to the stacking stage, the electrode plates and the separators are stacked by the electrode plate stacking device on the stacking stage to form an electrode assembly.

[0004] In a method of stacking positive plates, negative plates, and separators using an electrode plate stacking device, a zigzag folding (or accordion folding) method forms a separator in a zigzag folded shape and alternately stacks positive plates and negative plates therebetween.

[0005] Typically, this zigzag folding method supplies a diaphragm from a diaphragm supply portion located on the upper part of an electrode plate stacking portion stacked with electrode plates and diaphragms, and moves the diaphragm back and forth in a direction parallel to the horizontal direction by a device for moving the diaphragm to stack the supplied diaphragm on the upper part of the electrode plate.

[0006] At this time, as the diaphragm is reciprocated by the diaphragm moving device, a portion of the diaphragm between the diaphragm supply unit and the diaphragm moving device may not obtain a predetermined tension or more. In other words, the diaphragm between the diaphragm supply unit and the diaphragm moving device may sag.

[0007] As described above, when the separator is relaxed, the separator moved by the separator moving device may be folded, so that the shape of the separator may be damaged, and the performance of the battery cell manufactured using the separator with the damaged shape may also be reduced.

[0008] Therefore, it is necessary to develop an electrode plate stacking device and an electrode plate stacking method that can prevent the shape of the separator from being damaged when the separator is stacked on the electrode plate using a zigzag folding method. Summary of the Invention

[0009] (1) Technical issues to be resolved

[0010] A technical problem of the present disclosure is to prevent the shape of the separator stacked on the electrode plate in a zigzag folding manner from being damaged.

[0011] Another technical problem of the present disclosure is to prevent the performance of a battery cell manufactured including a positive electrode plate, a negative electrode plate, and a separator from being degraded.

[0012] The disclosed electrode plate stacking device and electrode plate stacking method can be widely used in green technology fields utilizing batteries, such as electric vehicles. Furthermore, battery cells manufactured using the disclosed electrode plate stacking device and electrode plate stacking method can be used in environmentally friendly electric vehicles and hybrid vehicles, which prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0013] (2) Technical solution

[0014] As a technical solution to the above-mentioned technical problems, an electrode plate stacking device according to an embodiment of the present disclosure may include: an electrode plate stacking portion, on which positive plates, negative plates and separators are stacked; an electrode plate conveying portion, which supplies the positive plates and the negative plates alternately to the electrode plate stacking portion one by one for stacking; a separator supply portion, which supplies the separator to the electrode plate stacking portion; and a separator stacking portion, which moves the separator back and forth along a first moving direction parallel to the horizontal direction and a second moving direction opposite to the first moving direction, i.e., a second moving direction, so as to stack the separator between the alternately stacked positive plates and the negative plates, and the separator stacking portion supports a portion of the separator located between the separator supply portion and the electrode plate stacking portion to prevent the separator from folding.

[0015] In addition, the diaphragm stacking part may include: a first guide module, which is arranged at the upper part of the electrode plate stacking part and guides the movement of the diaphragm; a second guide module, which is arranged at the lower part of the first guide module and moves the diaphragm back and forth along the first moving direction and the second moving direction; and a third guide module, which supports a part of the diaphragm between the first guide module and the second guide module to prevent the diaphragm from folding.

[0016] In addition, the diaphragm stacking part may further include a moving module that moves the second guide module and the third guide module in one or more directions among the first moving direction, the second moving direction, and a direction parallel to the vertical direction.

[0017] In addition, the first guide module may include a first roller and a second roller disposed adjacent to each other and rotatable, and the first roller and the second roller allow the diaphragm to pass between the first roller and the second roller, thereby guiding the movement of the diaphragm.

[0018] In addition, the second guide module may include a third roller and a fourth roller rotatably provided adjacent to each other on the moving module, wherein the third roller and the fourth roller allow the membrane to pass between the third roller and the fourth roller and be moved by the moving module.

[0019] In addition, the third guide module may include a fifth roller and a sixth roller arranged adjacent to each other and arranged on the moving module, and the third guide module includes a horizontal moving component, which moves the fifth roller and the sixth roller along the first moving direction or the second moving direction based on the moving module. The fifth roller and the sixth roller allow the diaphragm to pass between the fifth roller and the sixth roller and move through the moving module and the horizontal moving component.

[0020] In addition, the third guide module may further include: a buffer component, which is arranged at the first moving direction end and the second moving direction end of the horizontal moving component, and absorbs the impact generated when the fifth roller and the sixth roller move toward the first moving direction end or the second moving direction end of the horizontal moving component.

[0021] Additionally, the buffer component may be a damper.

[0022] In addition, the electrode plate stacking device may further include a moving portion that moves the electrode plate stacking portion in one or more directions among the first moving direction, the second moving direction, and the direction parallel to the vertical direction.

[0023] In addition, when the moving module moves the second guide module and the third guide module along the first moving direction, the moving part can move the electrode plate stacking part along the second moving direction; when the moving module moves the second guide module and the third guide module along the second moving direction, the moving part can move the electrode plate stacking part along the first moving direction.

[0024] In addition, the moving module may include: a horizontal moving component, which moves along the first moving direction or the second moving direction; and a vertical moving component, which is combined with the horizontal moving component and moves along the first moving direction or the second moving direction, and the vertical moving component is provided with the second guide module and the third guide module, and moves the second guide module and the third guide module along the direction parallel to the vertical direction.

[0025] In addition, the electrode plate stacking apparatus may further include a control unit configured to control a speed at which the diaphragm supplying unit supplies the diaphragm, movement of the moving module, and movement of the moving unit.

[0026] In addition, the third guide module may include a tension measuring device, which measures the tension acting on the diaphragm passing between the fifth roller and the sixth roller along the first moving direction or the second moving direction, and the control unit controls the speed at which the diaphragm supply unit supplies the diaphragm, the movement of the moving module, and the movement of the moving unit, so that the tension measured by the tension measuring device maintains a preset reference tension.

[0027] In addition, the tension measuring device may measure the tension by measuring a force applied by the diaphragm to the fifth roller or the sixth roller in the first moving direction or the second moving direction.

[0028] In addition, the diaphragm stacking unit may further include: an identification module for identifying whether one side or the other side of the diaphragm forms a plane. When the identification module identifies that one side and the other side of the diaphragm do not form a plane, the control unit controls the speed at which the diaphragm supply unit supplies the diaphragm, the movement of the moving module, and the movement of the moving unit, so that one side and the other side of the diaphragm become planes.

[0029] As a technical solution to the above-mentioned technical problems, an electrode plate stacking method according to an embodiment of the present disclosure may include: a first step of supplying positive plates, negative plates and separators to an electrode plate stacking part; and a second step of stacking the positive plates, the negative plates and the separators so that the separators are stacked between the positive plates and the negative plates when the positive plates and the negative plates are alternately stacked. In the first step, the separators are supplied by a separator supply part, and in the second step, the separators are stacked by a separator stacking part, which reciprocates the separators along a first moving direction parallel to a horizontal direction and a second moving direction opposite to the first moving direction, and the separator stacking part supports a portion of the separator located between the separator supply part and the electrode plate stacking part to prevent the separator from folding.

[0030] In addition, the diaphragm stacking part may include: a first guide module, which is arranged at the upper part of the electrode plate stacking part and guides the movement of the diaphragm; a second guide module, which is arranged at the lower part of the first guide module and moves the diaphragm back and forth along the first moving direction and the second moving direction; and a third guide module, which supports a part of the diaphragm between the first guide module and the second guide module to prevent the diaphragm from folding.

[0031] In addition, the diaphragm stacking part may further include a moving module that moves the second guide module and the third guide module along one or more directions among the first moving direction, the second moving direction, and a direction parallel to the vertical direction.

[0032] In addition, the third guide module may include a fifth roller and a sixth roller arranged adjacent to each other and arranged on the moving module, and the third guide module includes a horizontal moving component, which moves the fifth roller and the sixth roller along the first moving direction or the second moving direction based on the moving module. The fifth roller and the sixth roller allow the diaphragm to pass between the fifth roller and the sixth roller and move through the moving module and the horizontal moving component.

[0033] Specific matters of other embodiments for solving the technical problems are included in the description and drawings of the invention.

[0034] (3) Beneficial effects

[0035] According to the above-mentioned problem solution of the present invention, the electrode plate stacking device and the electrode plate stacking method of the present invention provide an effect of preventing the diaphragm stacked on the electrode plate from folding and causing damage to its shape by including a third guide module that can support a part of the diaphragm between the first guide module and the second guide module and apply a predetermined amount of tension to the diaphragm.

[0036] In addition, since the battery cell is prevented from being manufactured including the separator with a damaged shape, it is possible to prevent the performance of the battery cell from being degraded. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a diagram illustrating an electrode plate stacking device according to one embodiment of the present disclosure.

[0038] Figure 2 1 is a diagram showing a state in which separators are stacked on electrode plates via a separator stack portion on an electrode plate stack portion whose position is fixed.

[0039] Figure 3 1 is a diagram showing a state in which separators are stacked on electrode plates by a separator stacking unit on an electrode plate stacking unit that moves in a horizontal direction.

[0040] Figure 4 is a flowchart illustrating an electrode plate stacking method according to one embodiment of the present disclosure. DETAILED DESCRIPTION

[0041] Below, embodiments of the present application are described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. However, the present application can be implemented in various forms and is not limited to the embodiments described herein. In addition, in order to clearly illustrate the present application, parts not related to the description are omitted from the drawings, and similar parts are given similar reference numerals throughout the specification.

[0042] Throughout this specification, when a certain part is “connected” to another part, this includes not only the case of being “directly connected” but also the case of being “electrically connected” with another element interposed therebetween.

[0043] Throughout the specification of the present application, when a component is located “on” another component, this not only includes a case where the component is in contact with the other component, but also includes a case where another component is present between the two components.

[0044] Throughout this specification, when a section "includes" a component, unless otherwise specified, it means that other components may be further included, not excluded. Degree terms such as "about" and "substantially" are used throughout this specification to indicate a numerical value or a value close to that value when inherent manufacturing and material tolerances exist in the referenced meanings, and are used to prevent unscrupulous infringers from misappropriating disclosures that mention exact or absolute values ​​to aid understanding of this application. Degree terms such as "to the step of" or "the step of" used throughout this specification do not mean "the step of" or "the step of" used to refer to a specific value.

[0045] Hereinafter, the preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and the following description. However, the present disclosure is not limited to the embodiments described herein and may also be embodied in other forms. Throughout the specification, the same reference numerals represent the same components.

[0046] Hereinafter, an electrode plate stacking device according to an embodiment of the present disclosure will be described.

[0047] Figure 1 is a diagram illustrating an electrode plate stacking device according to one embodiment of the present disclosure.

[0048] Reference Figure 1 In detail, the electrode plate stacking device 200 includes an electrode plate stacking portion 210 , a diaphragm stacking portion 240 and a moving portion 250 .

[0049] In addition, although not shown in the drawings, the electrode plate stacking device 200 may further include an electrode plate conveying unit, a separator supply unit, and a control unit.

[0050] First, the electrode plate stacking unit 210 will be described.

[0051] A positive electrode plate, a negative electrode plate, and a separator 230 may be stacked on the electrode plate stack part 210 .

[0052] For example, Figure 1 As shown, the electrode plate stack part 210 may be formed in a table shape with a flat upper surface, but the shape of the electrode plate stack part 210 is not limited thereto.

[0053] Next, the electrode plate conveying unit will be described.

[0054] The electrode plate conveying part is configured to supply the positive electrode plates and the negative electrode plates to the electrode plate stacking part 210. For example, the electrode plate conveying part may supply the positive electrode plates and the negative electrode plates to the electrode plate stacking part 210 alternately one by one.

[0055] The electrode plate conveying unit may be configured by existing machines including a pick and place (P&P) machine and a selective compliance assembly robot arm (SCARA) robot, but the configuration of the electrode plate conveying unit is not limited thereto.

[0056] Next, the diaphragm supply unit will be described.

[0057] The separator supply part is configured to supply the separator 230 to the electrode plate stack part 210 .

[0058] For example, the separator supply portion may be formed by winding a predetermined amount of the separator 230 in a roll form, and configured such that the wound separator 230 is unwound and supplied in a direction toward the electrode plate stacking portion 210 .

[0059] Such a diaphragm supply unit may be provided on the upper portion of the first guide module described later. In this case, the upper portion of the predetermined object may be a position away from the predetermined object in the opposite direction to the direction of gravity.

[0060] Next, the diaphragm stack portion 240 will be described.

[0061] The separator stacking unit 240 reciprocates the separators 230 supplied by the separator supply unit along a first movement direction parallel to the horizontal direction and a second movement direction opposite to the first movement direction, thereby stacking the separators 230 between the positive and negative electrode plates alternately supplied and stacked by the electrode plate conveying unit. The horizontal direction may be a direction perpendicular to the direction in which gravity acts.

[0062] For example, the diaphragm stacking unit 240 can move the diaphragm 230 along a first moving direction to stack the diaphragm 230 on the positive plate set on the electrode plate stacking unit 210, and when the negative plate is stacked on the diaphragm 230 stacked on the positive plate, move the diaphragm 230 along a second moving direction to stack the diaphragm 230 on the negative plate.

[0063] The separator stack portion 240 may be configured to support a portion of the separator 230 located between the separator supply portion and the electrode plate stack portion 210 , thereby preventing the separator 230 from being folded.

[0064] Specifically, if Figure 1As shown, the diaphragm stack portion 240 may include a first guide module 241 , a second guide module 242 , a third guide module 243 , a moving module 244 and an identification module 245 .

[0065] The first guide module 241 may be provided at an upper portion of the electrode plate stack part 210 to guide movement of the separator 230 .

[0066] Specifically, refer to Figure 1 In detail, the first guide module 241 may include a first roller 241 - 1 and a second roller 241 - 2 that are disposed adjacent to each other and are capable of rotating.

[0067] In addition, the first roller 241 - 1 and the second roller 241 - 2 may allow the diaphragm 230 to pass therebetween and guide the movement of the diaphragm 230 .

[0068] The second guide module 242 may be provided below the first guide module 241 and reciprocate the membrane 230 along the first and second moving directions.

[0069] Specifically, refer to Figure 1 In detail, the second guide module 242 may include a third roller 242 - 1 and a fourth roller 242 - 2 that are adjacently disposed on the moving module and are capable of rotating.

[0070] In addition, the third roller 242 - 1 and the fourth roller 242 - 2 may allow the membrane 230 to pass between the third roller 242 - 1 and the fourth roller 242 - 2 and be moved by the moving module 244 .

[0071] That is, the second guide module 242 may simultaneously move the separator 230 between the third roller 242 - 1 and the fourth roller 242 - 2 , thereby reciprocating the separator 230 in the first and second moving directions to stack the separator 230 between the alternately stacked positive and negative plates.

[0072] The third guide module 243 may support a portion of the diaphragm 230 between the first guide module 241 and the second guide module 242 to prevent the diaphragm 230 from folding. That is, the third guide module 243 may prevent the diaphragm 230 from folding and damaging its shape.

[0073] Specifically, refer to Figure 1It is explained that the third guide module 243 may include a fifth roller 243-1 and a sixth roller 243-2 arranged adjacent to each other, and arranged on the moving module 244, and may include a horizontal moving component 243-3, which moves the fifth roller 243-1 and the sixth roller 243-2 along the first moving direction or the second moving direction based on the moving module 244.

[0074] At this time, the fifth roller 243 - 1 and the sixth roller 243 - 2 may allow the membrane 230 to pass between the fifth roller 243 - 1 and the sixth roller 243 - 2 and be moved by the moving module 244 and the horizontal moving member 243 - 3 .

[0075] In addition, if Figure 1 As shown, the fifth roller 243-1 and the sixth roller 243-2 are arranged on the moving module 244 together with the second guide module 242, so that they can move together with the second guide module 242 that stacks the diaphragm 230 on the electrode plate 220 formed by the positive plate or the negative plate and support a portion of the diaphragm 230, thereby preventing the diaphragm 230 from folding.

[0076] On the other hand, since the fifth roller 243 - 1 and the sixth roller 243 - 2 are moved together with the second guide module 242 by the moving module 244 , the relative positions between the fifth roller 243 - 1 and the sixth roller 243 - 2 and the second guide module 242 cannot be changed by the movement of the moving module 244 alone.

[0077] However, the horizontal moving member 243 - 3 moves the fifth roller 243 - 1 and the sixth roller 243 - 2 along the first moving direction or the second moving direction based on the moving module 244 , thereby changing the relative positions of the fifth roller 243 - 1 and the sixth roller 243 - 2 and the second guide module 242 .

[0078] Figure 2 1 is a diagram showing a state in which separators are stacked on electrode plates via a separator stack portion on an electrode plate stack portion whose position is fixed.

[0079] Specifically, if Figure 2 As shown, the fifth roller 243 - 1 and the sixth roller 243 - 2 may move along the first moving direction or the second moving direction with reference to the second guide module 242 when moving together with the second guide module 242 that stacks the separator 230 on the electrode plate 220 .

[0080] As described above, when the fifth roller 243 - 1 and the sixth roller 243 - 2 move in the first moving direction or the second moving direction with reference to the second guide module 242 , tension acting on the diaphragm 230 supported by the fifth roller 243 - 1 and the sixth roller 243 - 2 may be increased.

[0081] Therefore, compared with the case where the third guide module 243 is not provided with the horizontal moving component 243-3, so that the relative position between the fifth roller 243-1 and the sixth roller 243-2 and the second guide module 242 cannot be changed, when the third guide module 243 is provided with the horizontal moving component 243-3, so that the relative position between the fifth roller 243-1 and the sixth roller 243-2 and the second guide module 242 can be changed, the diaphragm 230 can be more effectively prevented from folding and causing shape damage.

[0082] On the other hand, the third guide module 243 may further include a buffer component 243 - 4 and a tension measuring device.

[0083] like Figure 1 As shown, the buffer component 243-4 can be set at the first moving direction end and the second moving direction end of the horizontal moving component 243-3, and can absorb the impact generated when the fifth roller 243-1 and the sixth roller 243-2 move toward the first moving direction end or the second moving direction end of the horizontal moving component 243-3.

[0084] The buffer member 243 - 4 may be formed of a conventional damper, but the structure of the buffer member 243 - 4 is not limited thereto.

[0085] The tension measuring device may be provided on the third guide module 243 so as to measure the tension acting on the diaphragm 230 passing between the fifth roller 243 - 1 and the sixth roller 243 - 2 along the first moving direction or the second moving direction.

[0086] Specifically, the tension measuring device can measure the tension acting on the diaphragm 230 in the first moving direction or the second moving direction by measuring the force of the fifth roller 243 - 1 or the sixth roller 243 - 2 pressed by the diaphragm 230 in the first moving direction or the second moving direction.

[0087] Such a tension measuring device may be constituted by an existing load cell, but the configuration of the tension measuring device is not limited thereto.

[0088] The moving module 244 can move the second guide module 242 and the third guide module 243 provided on the moving module 244 in one or more directions of the first moving direction, the second moving direction, and a direction parallel to the vertical direction. In this case, the vertical direction can be a direction perpendicular to the horizontal direction.

[0089] Specifically, if Figure 1 As shown, the moving module 244 may include a horizontal moving component 244 - 1 and a vertical moving component 244 - 2 .

[0090] The horizontal moving member 244 - 1 is configured to move in the first moving direction or the second moving direction.

[0091] The vertical moving part 244 - 2 is coupled to the horizontal moving part 244 - 1 and moves in the first moving direction or the second moving direction.

[0092] In addition, the second guide module 242 and the third guide module 243 are provided on the vertical moving member 244 - 2 , and the vertical moving member 244 - 2 is configured to move the second guide module 242 and the third guide module 243 in a direction parallel to the vertical direction.

[0093] On the other hand, although not shown in the accompanying drawings, the moving module 244 can also be constructed to be able to move back and forth along a circular arc trajectory, so that the second guide module 242 and the third guide module 243 can be moved so that the second guide module 242 and the third guide module 243 supported by the moving module 244 move back and forth along the circular arc trajectory.

[0094] The recognition module 245 may be provided on the diaphragm stack part 240 and recognize whether one surface and the other surface of the diaphragm 230 form a plane.

[0095] For example, Figure 1 As shown, the recognition module 245 may be provided on the moving module 244 and recognize whether the shape of the diaphragm 230 located between the second guide module 242 and the third guide module 243 is damaged.

[0096] The recognition module 245 may be composed of an existing vision sensor capable of capturing and recognizing images, but the structure of the recognition module 245 is not limited thereto.

[0097] Next, the moving unit 250 will be described.

[0098] Reference Figure 1 In other words, the moving portion 250 can move the electrode plate stacking portion 210 along one or more of the first moving direction, the second moving direction, and a direction parallel to the vertical direction.

[0099] Figure 3 1 is a diagram showing a state in which separators are stacked on electrode plates by a separator stacking unit on an electrode plate stacking unit that moves in a horizontal direction.

[0100] At this time, if Figure 3As shown, when the moving module 244 moves the second guide module 242 and the third guide module 243 along the first moving direction, the moving part 250 can move the electrode plate stacking part 210 along the second moving direction; when the moving module 244 moves the second guide module 242 and the third guide module 243 along the second moving direction, the moving part 250 can move the electrode plate stacking part 210 along the first moving direction.

[0101] As described above, compared to the case where only the second guide module 242 and the third guide module 243 are moved on the electrode plate stacking part 210 which is fixed in position to stack the diaphragm 230 onto the electrode plate 220, in the case where the diaphragm 230 is stacked onto the electrode plate 220 by the second guide module 242 and the third guide module 243 and the electrode plate stacking part 210 which are moved in opposite directions to each other, the second guide module 242 and the third guide module 243 can be moved a shorter distance along the first moving direction or the second moving direction to stack the diaphragm 230 onto the electrode plate 220.

[0102] That is, the moving module 244 can reduce the moving range of the horizontal moving part 244 - 1 , thereby reducing the volume of the electrode plate stacking apparatus 200 .

[0103] Therefore, the electrode plate stacking device 200 can also be arranged in a relatively narrow space.

[0104] In addition, the moving part 250 can move the electrode plate stacking part 210 in a direction parallel to the vertical direction so that the electrode plate 220 stacked on the electrode plate stacking part 210 is located at the uppermost position to position the electrode plate 220 stacked with the separator 230 at a predetermined position.

[0105] On the other hand, the electrode plate stacking apparatus 200 according to one embodiment of the present disclosure may further include a control unit.

[0106] The control unit may control the operations of the components of the electrode plate stacking device 200 to prevent the separator 230 from being folded and causing damage to the shape of the separator 230. The control unit may be constituted by an existing computer, but the configuration of the control unit is not limited thereto.

[0107] For example, the control unit may control the speed at which the membrane supply unit supplies the membrane 230 , the movement of the moving module 244 , and the movement of the moving unit 250 so that the tension acting on the membranes 230 stacked on the electrode plate 220 maintains a preset reference tension.

[0108] Specifically, the control unit can control the speed at which the diaphragm supply unit supplies the diaphragm 230, the movement of the moving module 244, and the movement of the moving unit 250, so that the tension of the diaphragm 230 measured by the tension measuring device included in the third guide module 243 maintains a preset reference tension.

[0109] To give another example, when the identification module 245 identifies that one side and the other side of the diaphragm 230 do not form a plane, the control unit can control the speed at which the diaphragm supply unit supplies the diaphragm 230, the movement of the moving module 244, and the movement of the moving unit 250, so that one side and the other side of the diaphragm 230 become planes.

[0110] Hereinafter, a method for stacking electrode plates according to an embodiment of the present disclosure will be described.

[0111] Figure 4 is a flowchart illustrating an electrode plate stacking method according to one embodiment of the present disclosure.

[0112] Reference Figure 4 It is explained that the electrode plate stacking method includes: a first step S100 of supplying a positive electrode plate, a negative electrode plate and a separator 230 , and a second step S200 of stacking the positive electrode plate, the negative electrode plate and the separator 230 .

[0113] First, the first step S100 will be described.

[0114] The first step S100 is a step of supplying a positive electrode plate, a negative electrode plate, and a separator 230 to the electrode plate stack part 210 .

[0115] The positive and negative plates can be supplied to the electrode plate stacking unit 210 by the electrode plate conveying unit, and the configurations of the electrode plate conveying unit and the electrode plate stacking unit 210 are the same as those of the above-mentioned electrode plate stacking device 200 .

[0116] The separator 230 may be supplied to the electrode plate stacking unit 210 by a separator supplying part, and the structure of the separator supplying part is the same as that of the separator supplying part of the electrode plate stacking apparatus 200 described above.

[0117] Next, the second step S200 will be described.

[0118] The second step S200 is a step of stacking the positive electrode plates, the negative electrode plates, and the separator 230 so as to stack the separator 230 between the positive electrode plates and the negative electrode plates while alternately stacking the positive electrode plates and the negative electrode plates.

[0119] Specifically, in the second step S200 , the separator 230 may be stacked between the positive and negative electrode plates supplied to the electrode plate stacking unit 210 by the electrode plate conveying unit and alternately stacked using the separator stacking unit 240 , the moving unit 250 , and the control unit.

[0120] In this case, the configurations of the diaphragm stacking unit 240 , the moving unit 250 , and the control unit are the same as those of the electrode plate stacking device 200 described above.

[0121] Therefore, the separator 230 stacked to the electrode plate 220 through the separator stack part 240 can be prevented from being folded to cause a shape damage.

[0122] As described above, according to the electrode plate stacking device and the electrode plate stacking method disclosed herein, a third guide module is included that can support a portion of the diaphragm between the first guide module and the second guide module and apply a predetermined amount of tension to the diaphragm, thereby providing an effect of preventing the diaphragm stacked on the electrode plate from folding and causing shape damage.

[0123] In addition, since the battery cell is prevented from being manufactured including the separator with a damaged shape, it is possible to prevent the performance of the battery cell from being degraded.

[0124] The above description of the present disclosure is for illustrative purposes only. A person skilled in the art of the present disclosure will appreciate that other specific forms can be easily modified without changing the technical concept or essential features of the present disclosure. Therefore, it should be understood that the embodiments described above are illustrative in all respects and are not intended to be limiting. For example, components described in a single form may also be implemented in a dispersed manner, and similarly, components described in a dispersed manner may also be implemented in a combined manner.

[0125] The scope of the present disclosure should be indicated by the claims, rather than the detailed description above, and should be interpreted that all changes or modifications derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present disclosure.

Claims

1. An electrode plate stacking device, comprising: an electrode plate stacking portion on which the positive electrode plates, the negative electrode plates and the separator are stacked; an electrode plate conveying unit for alternately supplying the positive electrode plates and the negative electrode plates to the electrode plate stacking unit one by one for stacking; a diaphragm supplying portion, supplying the diaphragm to the electrode plate stacking portion; as well as a separator stacking unit that reciprocates the separator along a first moving direction parallel to a horizontal direction and a second moving direction opposite to the first moving direction to stack the separator between the alternately stacked positive and negative electrode plates; The separator stack portion supports a portion of the separator between the separator supply portion and the electrode plate stack portion to prevent the separator from being folded.

2. The electrode plate stacking device according to claim 1, wherein: The diaphragm stack comprises: a first guide module, disposed on an upper portion of the electrode plate stacking portion and guiding the movement of the diaphragm; a second guide module, disposed at a lower portion of the first guide module, and configured to reciprocate the diaphragm along the first moving direction and the second moving direction; and The third guide module supports a portion of the diaphragm between the first guide module and the second guide module to prevent the diaphragm from folding.

3. The electrode plate stacking device according to claim 2, wherein: The diaphragm stack further comprises: The moving module moves the second guiding module and the third guiding module along one or more directions among the first moving direction, the second moving direction and a direction parallel to the vertical direction.

4. The electrode plate stacking device according to claim 3, wherein: The first guide module includes a first roller and a second roller that are arranged adjacent to each other and are capable of rotating. The first roller and the second roller guide the movement of the diaphragm by allowing the diaphragm to pass therebetween.

5. The electrode plate stacking device according to claim 3, wherein: The second guide module includes a third roller and a fourth roller which are arranged adjacent to each other on the moving module and are capable of rotating. The third roller and the fourth roller allow the diaphragm to pass therebetween and be moved by the moving module.

6. The electrode plate stacking device according to claim 3, wherein: The third guide module includes a fifth roller and a sixth roller that are adjacent to each other and are arranged on the moving module, and the third guide module includes a horizontal moving component that moves the fifth roller and the sixth roller along the first moving direction or the second moving direction based on the moving module. The fifth roller and the sixth roller allow the diaphragm to pass between the fifth roller and the sixth roller, and to be moved by the moving module and the horizontal moving member.

7. The electrode plate stacking device according to claim 6, wherein: The third guidance module further includes: The buffer member is provided at the first moving direction end and the second moving direction end of the horizontal moving member and absorbs impact generated when the fifth roller and the sixth roller move toward the first moving direction end or the second moving direction end of the horizontal moving member.

8. The electrode plate stacking device according to claim 7, wherein: The buffer component is a damper.

9. The electrode plate stacking device according to claim 6, further comprising: The moving portion moves the electrode plate stacking portion along one or more of the first moving direction, the second moving direction, and the direction parallel to the vertical direction.

10. The electrode plate stacking device according to claim 9, wherein: When the moving module moves the second guide module and the third guide module along the first moving direction, the moving part moves the electrode plate stacking part along the second moving direction; when the moving module moves the second guide module and the third guide module along the second moving direction, the moving part moves the electrode plate stacking part along the first moving direction.

11. The electrode plate stacking device according to claim 10, wherein: The mobile module includes: a horizontal moving component, moving along the first moving direction or the second moving direction; and A vertical moving component is combined with the horizontal moving component and moves along the first moving direction or the second moving direction, and the vertical moving component is provided with the second guide module and the third guide module, and moves the second guide module and the third guide module along the direction parallel to the vertical direction.

12. The electrode plate stacking device according to claim 9, further comprising: The control unit controls a speed at which the diaphragm supplying unit supplies the diaphragm, movement of the moving module, and movement of the moving unit.

13. The electrode plate stacking device according to claim 12, wherein: The third guide module includes a tension measuring device, which measures the tension acting on the diaphragm passing between the fifth roller and the sixth roller along the first moving direction or the second moving direction. The control part controls a speed at which the diaphragm supply part supplies the diaphragm, movement of the moving module, and movement of the moving part so that the tension measured by the tension measuring device maintains a preset reference tension.

14. The electrode plate stacking device according to claim 13, wherein: The tension measuring device measures the tension by measuring a force applied by the diaphragm to the fifth roller or the sixth roller in the first moving direction or the second moving direction.

15. The electrode plate stacking device according to claim 12, wherein: The diaphragm stack further comprises: an identification module for identifying whether one side or the other side of the diaphragm forms a plane, When the recognition module recognizes that one side and the other side of the diaphragm do not form a plane, the control unit controls the speed at which the diaphragm supply unit supplies the diaphragm, the movement of the moving module, and the movement of the moving unit so that one side and the other side of the diaphragm become planes.

16. A method for stacking electrode plates, comprising: In the first step, a positive electrode plate, a negative electrode plate and a separator are supplied to an electrode plate stacking portion; as well as The second step is to stack the positive electrode plate, the negative electrode plate, and the separator so that the separator is stacked between the positive electrode plate and the negative electrode plate when the positive electrode plates and the negative electrode plates are alternately stacked. In the first step, the diaphragm is supplied by a diaphragm supply unit. In the second step, the diaphragms are stacked by a diaphragm stacking unit, and the diaphragm stacking unit reciprocates the diaphragms along a first moving direction parallel to a horizontal direction and a second moving direction opposite to the first moving direction. The separator stack portion supports a portion of the separator between the separator supply portion and the electrode plate stack portion to prevent the separator from being folded.

17. The electrode plate stacking method according to claim 16, wherein: The diaphragm stack comprises: a first guide module, disposed on an upper portion of the electrode plate stacking portion and guiding the movement of the diaphragm; a second guide module, disposed at a lower portion of the first guide module, and configured to reciprocate the diaphragm along the first moving direction and the second moving direction; and The third guide module supports a portion of the diaphragm between the first guide module and the second guide module to prevent the diaphragm from folding.

18. The electrode plate stacking method according to claim 17, wherein: The diaphragm stack further comprises: The moving module moves the second guiding module and the third guiding module along one or more directions among the first moving direction, the second moving direction and a direction parallel to the vertical direction.

19. The electrode plate stacking method according to claim 18, wherein: The third guide module includes a fifth roller and a sixth roller arranged adjacent to each other and arranged on the moving module, and the third guide module includes a horizontal moving component, which moves the fifth roller and the sixth roller along the first moving direction or the second moving direction based on the moving module. The fifth roller and the sixth roller allow the diaphragm to pass between the fifth roller and the sixth roller and move through the moving module and the horizontal moving component.

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