Unit cell stacking apparatus and method for stacking unit cells

Abstract

A unit cell stacking apparatus according to an embodiment of the present invention may include: a mounting plate on which a plurality of unit cells are sequentially placed so as to be stacked on top of each other; a guide unit connected to the mounting plate and guiding the downward movement of the mounting plate; a measuring unit that measures the position information of the guide unit and the position information of the unit cells; and a stacking unit that stacks the unit cells on the mounting plate according to the position information of the guide unit and the position information of the unit cells measured by the measuring unit.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10 - 2023 - 0118518 filed on September 6, 2023, and all the contents disclosed in the document of the Korean patent application are incorporated herein as part of this specification.

[0002] The present invention relates to an apparatus and a method for aligning unit cells for a secondary battery and stacking a plurality of them.

Background Art

[0003] In order to solve environmental pollution caused by the use of petroleum resources and the problem of insufficient energy sources due to the depletion of petroleum resources, research and development on power generation based on environmentally friendly energy sources are in progress. In particular, research on secondary batteries that can be repeatedly charged / discharged and have a high utilization rate is actively underway, and research is being conducted on various aspects such as the materials, structures, processes, and stability of secondary batteries.

[0004] Generally, examples of types of secondary batteries include nickel - cadmium batteries, nickel - metal hydride batteries, lithium - ion batteries, and lithium - ion polymer batteries. Such secondary batteries are not only used in small products such as digital cameras, P - DVDs, MP3Ps, mobile phones, PDAs (registered trademark), Portable Game Devices, Power Tools, and E - bikes, but also in large products that require high power such as electric vehicles and hybrid vehicles, as well as in power storage devices for storing surplus generated power or renewable energy and backup power storage devices.

[0005] To manufacture such secondary batteries, first, an electrode active material slurry is applied to a positive electrode current collector and a negative electrode current collector to manufacture a positive electrode and a negative electrode, and by laminating these on both sides of a separator, an electrode assembly of a predetermined shape is formed. Then, the electrode assembly is housed in a battery case, an electrolyte is injected, and then sealed.

[0006] In the process of manufacturing an electrode assembly through a stacking process of positive and negative electrodes, various forms of electrode assemblies are produced depending on the type of unit cell. For example, a bi-cell is a unit cell in which one or more positive electrodes and one or more negative electrodes are stacked with a separator in between, and the types of electrodes located on both sides are the same. A mono-cell is a unit cell in which one or more positive electrodes and one or more negative electrodes are stacked with a separator in between, and the types of electrodes located on both sides are different. Stacking may also be carried out simply by interposing a separator between the positive and negative electrodes.

[0007] However, during the stacking process of multiple unit cells, a problem can occur where the unit cells are not properly aligned during stacking. When an electrode assembly is formed by stacking multiple unit cells that are not properly aligned, a problem arises in which the yield and performance of the secondary battery are reduced.

[0008] While techniques have been introduced to stack multiple unit cells more precisely by measuring and comparing the position of the unit cell and the position of the area where the unit cells are stacked, difficulties remain in stacking unit cells in a fixed position. Therefore, there is a need for a unit cell stacking device that can stack unit cells with greater precision. [Overview of the project] [Problems that the invention aims to solve]

[0009] One problem that the present invention aims to solve is to provide a unit cell stacking apparatus in which the position of the reference portion that determines the stacking position of the unit cells is maintained even when multiple unit cells are stacked on a mounting plate.

[0010] One problem that the present invention aims to solve is to provide a unit cell stacking apparatus that readjusts the stacking operation when the unit cells are not stacked in the correct position. [Means for solving the problem]

[0011] A unit cell stacking apparatus according to an embodiment of the present invention may include: a mounting plate on which a plurality of unit cells are sequentially placed so as to be stacked on top of each other; a guide unit connected to the mounting plate and guiding the downward movement of the mounting plate; a measuring unit that measures the position information of the guide unit and the position information of the unit cells; and a stacking unit that stacks the unit cells on the mounting plate according to the position information of the guide unit and the position information of the unit cells measured by the measuring unit.

[0012] The mounting plate includes connecting openings formed through each corner, and the guide portion can be connected by passing through the connecting openings.

[0013] While multiple unit cells are stacked on the mounting plate, the mounting plate can be moved downward along the guide portion.

[0014] Multiple guide sections are formed to be positioned at each corner of the aforementioned mounting plate. The measuring section measures a first reference point where multiple imaginary lines connecting the multiple guide sections intersect, and can measure a second reference point, which is the center point of the uppermost unit cell among multiple unit cells stacked on top of each other.

[0015] The stacked section can be configured to stack unit cells such that the first reference point and the second reference point coincide.

[0016] The unit cell stacking apparatus according to an embodiment of the present invention may further include a control unit that controls the operation of the stacking unit according to the position information of the guide unit and the position information of the unit cell measured by the measuring unit.

[0017] The control unit can determine whether the first reference point and the second reference point coincide.

[0018] If the control unit determines that the first reference point and the second reference point do not coincide, it can readjust the stacking operation of the stacking section.

[0019] As the mounting plate moves downward along the guide portion, the guide portion can be formed to protrude above the mounting plate.

[0020] The stacking section can stack multiple unit cells sequentially on the aforementioned mounting plate such that the height of the uppermost unit cell among the multiple unit cells is the same as the height of the uppermost unit cell among the multiple unit cells.

[0021] The height of the upper surface of the guide portion can be maintained at a constant level.

[0022] The aforementioned connecting opening is formed to penetrate along the stacking direction of the unit cells, and the aforementioned mounting plate can move along the guide portion in a direction aligned with the stacking direction of the unit cells.

[0023] Multiple guide sections are formed, and the center positions of the multiple guide sections can be the same as the center positions of the unit cells stacked on the aforementioned mounting plate.

[0024] Another embodiment of the present invention provides a method for stacking unit cells, which includes: a stacking step in which a plurality of unit cells are stacked on a mounting plate by a stacking unit, while the mounting plate moves downward along a guide unit that is connected through the mounting plate; a measurement step in which a measuring unit measures the position information of the guide unit and the position information of the unit cells; and a control step in which a control unit controls the operation of the stacking unit according to the position information of the guide unit and the position information of the unit cells measured in the measurement step.

[0025] In the aforementioned stacking step, the aforementioned stacking plate can be moved downward along the guide portion through the connecting openings in which the guide portion is connected to each corner.

[0026] In the measurement step, the measurement unit can measure a first reference point where a plurality of virtual lines connecting the plurality of guide units intersect, and can measure a second reference point which is the center point of the unit cell located at the uppermost end among the plurality of unit cells laminated on one another.

[0027] The control step can include a determination step in which the control unit determines whether the first reference point and the second reference point match, and an adjustment step in which the control unit readjusts the lamination operation of the lamination unit when it is determined in the determination step that the first reference point and the second reference point do not match.

Advantages of the Invention

[0028] According to a preferred embodiment of the present invention, even when a plurality of unit cells are laminated on a placement plate, the position of the portion serving as a reference for determining the lamination position of the unit cells is maintained, so that even if the placement plate descends due to the lamination of the unit cells, the unit cells can be laminated more precisely.

[0029] According to a preferred embodiment of the present invention, when the unit cells are not laminated at a fixed position, the lamination operation can be readjusted to laminate the unit cells more precisely.

[0030] In addition, effects that can be easily predicted by those skilled in the art from the configuration according to the preferred embodiment of the present invention can be included.

Brief Description of the Drawings

[0031] The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the invention described below, serve to better understand the technical idea of the present invention. Therefore, the present invention should not be construed as being limited only to the matters described in these drawings. [Figure 1] It is a perspective view of the shape in which a unit cell is placed on a unit cell lamination device according to a comparative embodiment. [Figure 2] It is a schematic view of the shape in which a unit cell lamination device according to a comparative embodiment measures the position of a unit cell. [Figure 3] This is a perspective view of a unit cell stacking apparatus according to a comparative embodiment, showing the shape in which multiple unit cells are stacked. [Figure 4] This is a schematic diagram of the shape of a unit cell stacking device according to a comparative embodiment, which measures the position of multiple stacked unit cells. [Figure 5] This is a perspective view of a unit cell stacking apparatus according to an embodiment of the present invention. [Figure 6] This is a perspective view of a unit cell stacking device according to an embodiment of the present invention, showing a configuration in which multiple unit cells are stacked. [Figure 7] This is a block diagram of a unit cell stacking apparatus according to an embodiment of the present invention. [Figure 8] This is a plan view of a unit cell stacking apparatus according to an embodiment of the present invention. [Figure 9] This is a flowchart of a stacking method for unit cells according to another embodiment of the present invention. [Modes for carrying out the invention]

[0032] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to be easily implemented by a person with ordinary skill in the art to which the present invention pertains. However, the present invention can be realized in a variety of different forms and is not limited to or restricted to the following embodiments.

[0033] To clearly illustrate the present invention, detailed descriptions of relevant prior art that are not relevant to the description or that may obscure the gist of the invention have been omitted. In this specification, when assigning reference numerals to components in each drawing, the same or similar reference numerals are used throughout the specification for components that are the same or similar.

[0034] Furthermore, terms and words used in this specification and in the claims should not be interpreted in a manner limited to their ordinary and dictionary meanings, but rather should be interpreted in a manner and concept consistent with the technical idea of ​​the present invention, in accordance with the principle that inventors may appropriately define the concepts of terms in order to best describe their invention.

[0035] Figure 1 is a perspective view of the unit cell stacking apparatus according to the comparative embodiment with unit cells placed on it, and Figure 2 is a schematic diagram of the unit cell stacking apparatus according to the comparative embodiment for measuring the position of unit cells.

[0036] Referring to Figures 1 and 2, the unit cell stacking apparatus according to the comparative embodiment can measure the alignment of the unit cell C and place the unit cell. For example, the unit cell measuring apparatus according to the comparative embodiment may include a plate P1 on which the unit cell C is placed, a measuring unit P2 for measuring the position of the unit cell C and the position of the plate P1, and a stacking unit (not shown) for stacking multiple unit cells C on the plate P1.

[0037] Specifically, the stacking unit (not shown) can grasp a unit cell C located in another space, move it to the upper side of plate P1, and then release the grip on the unit cell C, thereby placing the unit cell C on the upper surface of plate P1.

[0038] In this process, the measurement unit P2 can measure the positional information of the unit cell C. For example, the measurement unit P2 can detect the appearance of the unit cell C and identify its center point, thereby measuring the center point information of the unit cell C.

[0039] Furthermore, the measurement unit P2 can measure the positional information of plate P1. For example, if multiple vision marks M are formed at each corner of plate P1, the measurement unit P2 can measure the center position of plate P1 by identifying the point where virtual lines connecting the multiple vision marks M intersect as the center of plate P1.

[0040] Based on the center position information of the unit cell C and the center position of the plate P1 measured by the measurement unit P2, the stacking unit (not shown) can place the unit cell C on the upper surface of the plate P1. Specifically, the stacking unit (not shown) can place the unit cell C on the upper surface of the plate P1 such that the center position of the unit cell C and the center position of the plate P1 coincide.

[0041] While this operating principle allows a unit cell C to be placed on plate P1, the following problems may occur when multiple unit cells C are stacked.

[0042] Figure 3 is a perspective view of the unit cell stacking device according to the comparative embodiment, showing the shape in which multiple unit cells are stacked, and Figure 4 is a schematic diagram of the unit cell stacking device according to the comparative embodiment, showing the shape in which the position of multiple stacked unit cells is measured.

[0043] Referring to Figures 3 and 4, multiple unit cells C can be stacked on plate P1. During the process of stacking multiple unit cells C, plate P1 can gradually move downwards. Also, during the process of stacking multiple unit cells C, the unit cells C gradually accumulate.

[0044] As mentioned above, the measurement unit P2 measures the center position of the unit cell C and the center position of the plate P1, but as multiple unit cells C are stacked, the measurement accuracy of the measurement unit P2 may decrease.

[0045] For example, when measuring unit P2 measures the center position of a unit cell C, it can measure the center position information of the uppermost unit cell C among multiple unit cells C. When measuring unit P2 measures the center position of plate P1, it can measure the center point of plate P1, that is, the center point of the lowermost unit cell C among multiple unit cells C.

[0046] In other words, when multiple unit cells C are stacked, there is a risk of distortion occurring between the center position of the unit cell C measured by the measurement unit P2 and the center position of the plate P1. This is because a height difference occurs between the center position of the unit cell C and the center position of the plate P1, and the measurement range of the measurement unit P2 is formed by the field of view.

[0047] Therefore, based on a top-down view, the position where the stacking unit (not shown) attempts to stack the unit cell C will differ from the position where the unit cell C should actually be stacked. This could lead to a problem where multiple unit cells C are not stacked as originally designed.

[0048] To prevent such problems and to stack unit cells C more precisely, a unit cell stacking apparatus 1 according to the following embodiment of the present invention can be used. The unit cell stacking apparatus 1 according to the embodiment of the present invention will be described below.

[0049] Figure 5 is a perspective view of a unit cell stacking apparatus 1 according to an embodiment of the present invention, Figure 6 is a perspective view of a unit cell stacking apparatus 1 according to an embodiment of the present invention in which a plurality of unit cells C are stacked, and Figure 7 is a block diagram of a unit cell stacking apparatus 1 according to an embodiment of the present invention.

[0050] Referring to Figures 5 to 7, the unit cell stacking apparatus 1 according to an embodiment of the present invention can stack multiple unit cells C in sequence. Furthermore, the unit cell stacking apparatus 1 can stack the unit cells C in a more precise position based on the position information of the unit cells C and the position information of the area where the unit cells C are stacked.

[0051] For example, the unit cell stacking device 1 compares the position of the unit cell C with the position of the area where the unit cell C is stacked. If the unit cell C is not stacked in the correct position, it can adjust the stacking operation to stack the unit cell C in the correct position.

[0052] In this case, multiple unit cells C are stacked, and the portion where the unit cells C are stacked descends, but the unit cell stacking device 1 can perform the stacking operation accurately in the same way.

[0053] Specifically, the unit cell stacking device 1 may include a mounting plate 10, a guide section 11, a measuring section 12, and a stacking section 13.

[0054] Multiple unit cells C can be sequentially placed on the mounting plate 10 so as to be stacked on top of each other. For example, the mounting plate 10 is formed in the shape of a plate with a flat surface, and multiple unit cells C can be sequentially stacked on the upper surface of the mounting plate 10.

[0055] The guide portion 11 is connected to the mounting plate 10 and can guide the downward movement of the mounting plate 10. For example, the mounting plate 10 includes connecting openings 100 formed through each corner, and the guide portion 11 can be connected by passing through the connecting openings 100.

[0056] With this structure, the guide portion 11 is positioned to penetrate the connecting opening 100, and while multiple unit cells C are stacked on the mounting plate 10, the mounting plate 10 can move downward along the guide portion 11. In other words, the connecting opening 100 is formed to penetrate along the stacking direction of the unit cells C, and the mounting plate 10 can move along the guide portion 11 in a direction aligned with the stacking direction of the unit cells C.

[0057] Furthermore, multiple guide portions 11 can be formed so as to be positioned at each corner of the mounting plate 10. However, the form of the guide portion 11 is not limited to this, and the guide portion 11 can have various forms, such as being formed through the mounting plate 10 so that the mounting plate 10 moves along it.

[0058] As the mounting plate 10 moves downward along the guide portion 11, the guide portion 11 can be formed to protrude above the mounting plate 10. That is, the guide portion 11 is formed vertically, and while the guide portion 11 maintains its posture and position, only the mounting plate 10 can move downward.

[0059] In other words, as the mounting plate 10 moves downward along the guide portion 11 while the upper surface of the guide portion 11 is in the same plane as the upper surface of the mounting plate 10, the upper surface of the guide portion 11 will be positioned higher than the upper surface of the mounting plate 10.

[0060] The measuring unit 12 can measure the position information of the guide unit 11 and the position information of the unit cell C. For example, the measuring unit 12 can view the stacked unit cells C while positioned above the mounting plate 10.

[0061] The position information of the guide section 11 and the position information of the unit cell C measured by the measurement section 12 can be used as reference information for the stacking operation of the stacking section 13, which will be described later.

[0062] Figure 8 is a plan view of a unit cell stacking apparatus 1 according to an embodiment of the present invention.

[0063] Referring to Figure 8, the measuring unit 12 can measure the center position information of the multiple guide units 11. For example, if the multiple guide units 11 are formed to penetrate each corner of the mounting plate 10, the measuring unit 12 can calculate the center position based on the upper surfaces of the multiple guide units 11 while positioned above the guide units 11.

[0064] Specifically, the measuring unit 12 can measure a first reference point R1 at which multiple virtual lines connecting multiple guide units 11 intersect. More specifically, the measuring unit 12 can measure the intersection of multiple virtual lines that intersect each other, using an overhead view as a reference, as the first reference point R1. In other words, the measuring unit 12 can calculate the central intersection of virtual lines connecting the center points of the upper surfaces of the guide units 11 and measure it as the first reference point R1.

[0065] Next, the measuring unit 12 can measure the center position information of the unit cell C. For example, if multiple unit cells C are stacked, and the measuring unit 12 is positioned above the multiple unit cells C, it can measure the center position of the upper surface of the multiple unit cells C. Specifically, the measuring unit 12 can measure the second reference point R2, which is the center point of the uppermost unit cell C among the multiple unit cells C stacked on top of each other.

[0066] The stacking section 13 can stack unit cells C onto the mounting plate 10. For example, the stacking section 13 can attract and grasp unit cells C located in other spaces and move the unit cells C to the upper side of the mounting plate 10. In this case, the stacking section 13 can move horizontally while grasping the unit cells C, thereby moving the unit cells C to the upper side of the mounting plate 10.

[0067] The stacking unit 13 can place the unit cell C on the upper surface of the mounting plate 10 by releasing its grip while the unit cell C is positioned above the mounting plate 10. By repeating this operation, the stacking unit 13 can stack multiple unit cells C.

[0068] The stacking section 13 can stack multiple unit cells C sequentially on the aforementioned mounting plate 10 such that the height of the uppermost unit cell C among the multiple unit cells C is the same as the height of the uppermost unit cell C and the height of the guide section 11.

[0069] In other words, when multiple unit cells C are stacked sequentially on the mounting plate 10, the height of the uppermost unit cell C among the multiple unit cells C can be the same as the height of the uppermost unit cell C and the height of the guide portion 11.

[0070] In other words, the height of the upper surface of the guide section 11 is kept constant, the speed at which multiple unit cells C are stacked by the stacking section 13 is the same as the speed at which the mounting plate 10 descends, and the height of the upper surface of the unit cell C located at the uppermost end of the multiple unit cells C is kept constant.

[0071] As a result, the height of the upper surface of the guide section 11 and the height of the uppermost unit cell C among the multiple unit cells C can be kept constant and identical to each other.

[0072] The stacking unit 13 can stack the unit cells C onto the mounting plate 10 according to the position information of the guide unit 11 and the position information of the unit cells C measured by the measuring unit 12. For example, the unit cell stacking device 1 may further include a control unit 14 that controls the operation of the stacking unit 13 according to the position information of the guide unit 11 and the position information of the unit cells C measured by the measuring unit 12.

[0073] In other words, the control unit 14 can compare the position information of the guide unit 11 measured by the measurement unit 12 with the position information of the unit cell C and readjust the stacking operation of the stacking unit 13. For example, the control unit 14 can determine whether the first reference point R1 and the second reference point R2 measured by the measurement unit 12 coincide, and determine whether the unit cell C is stacked in the correct position by the stacking unit 13. If the control unit 14 determines that the first reference point R1 and the second reference point R2 do not coincide, it can readjust the stacking operation of the stacking unit 13.

[0074] In other words, the control unit 14 can control the stacking section 13 so that the first reference point R1 and the second reference point R2 coincide. To put it another way, the stacking section 13 can stack unit cells C so that the first reference point R1 and the second reference point R2 coincide. To put it simply, the center positions of the multiple guide sections 11 and the center positions of the unit cells C stacked on the mounting plate 10 can be the same.

[0075] In summary, as multiple unit cells C are stacked on the upper surface of the mounting plate 10 by the stacking section 13, the mounting plate 10 can descend along the guide section 11. In this case, the height of the upper surface of the guide section 11 is kept constant while the guide section 11 is fixed, and the speed at which the multiple unit cells C are stacked is the same as the speed at which the mounting plate 10 descends. Therefore, the height of the upper surface of the unit cell C located at the uppermost end of the multiple unit cells C can also be kept constant.

[0076] In other words, multiple unit cells C are stacked on the mounting plate 10 such that the upper surface of the uppermost unit cell C and the upper surface of the guide portion 11 form the same plane, and the measuring unit 12 can measure a first reference point R1 with respect to the upper surface of the guide portion 11, and measure a second reference point R2 with respect to the upper surface of the uppermost unit cell C among the multiple unit cells C.

[0077] Multiple unit cells C are stacked so that the first reference point R1 and the second reference point R2 coincide. However, if the control unit 14 determines that the first reference point R1 and the second reference point R2 do not coincide, the control unit 14 can readjust the stacking operation of the stacking section 13 so that the first reference point R1 and the second reference point R2 coincide.

[0078] According to the operating principle of this unit cell stacking device 1, even when the mounting plate 10 descends while multiple unit cells C are stacked, the first reference point R1 is calculated based on the upper surface of the guide section 11, so the position of the first reference point R1 can be kept constant. In other words, regardless of the downward movement of the mounting plate 10, the state in which the first reference point R1 and the second reference point R2 are located on the same plane is maintained, so that multiple unit cells C can be stacked while the alignment of the unit cells C is kept constant.

[0079] As a result, even when multiple unit cells C are stacked on the mounting plate 10, the position of the reference part that determines the stacking position of the unit cells C is maintained, so that the unit cell stacking device 1 can stack the unit cells C more precisely even as the mounting plate 10 descends as the unit cells C are stacked. Furthermore, if the unit cells C are not stacked in the correct position, the unit cell stacking device 1 can readjust the stacking operation to stack the unit cells C more precisely.

[0080] The following describes a method for stacking unit cells C according to another embodiment of the present invention. This method for stacking unit cells C according to another embodiment of the present invention involves stacking a plurality of unit cells C using the unit cell stacking apparatus 1 according to the above-described embodiment of the present invention. Some of the content that overlaps with the above-described content regarding the unit cell stacking apparatus 1 according to the present invention will be omitted below.

[0081] Figure 9 is a flowchart of a stacking method for unit cells C according to another embodiment of the present invention.

[0082] Referring to Figure 9, a more precise stacking process for unit cells C can be performed by a stacking method for unit cells C according to another embodiment of the present invention. For example, by a stacking method for unit cells C, unit cells C can be stacked in a more accurate position based on the positional information of the unit cells C and the positional information of the portion on which the unit cells C are stacked.

[0083] The stacking method for unit cell C may include a stacking step (S10), a measurement step (S20), and a control step (S30).

[0084] In the stacking step (S10), multiple unit cells C are stacked on the mounting plate 10 by the stacking section 13, while the mounting plate 10 can move downward along the guide section 11 which is connected through the mounting plate 10.

[0085] In the stacking step (S10), the mounting plate 10 can move downward along the guide portion 11 via connecting openings 100 through which the guide portion 11 is connected at each corner. As the mounting plate 10 moves downward along the guide portion 11, the guide portion 11 can be formed to protrude from the upper side of the mounting plate 10.

[0086] In the measurement step (S20), the measuring unit 12 can measure the position information of the guide unit 11 and the position information of the unit cell C. For example, the measuring unit 12 can view the stacked unit cells C while positioned above the mounting plate 10.

[0087] In the measurement step (S20), the measurement unit 12 can measure the central position information of the multiple guide units 11. Specifically, the measurement unit 12 can measure the first reference point R1 where multiple virtual lines connecting the multiple guide units 11 intersect. More specifically, with respect to the upper view, the measurement unit 12 can measure the intersection of the virtual lines that intersect each other among the multiple virtual lines connecting the multiple guide units 11 as the first reference point R1.

[0088] In the measurement step (S20), the measurement unit 12 can measure the center position information of the unit cell C. Specifically, the measurement unit 12 can measure the second reference point R2, which is the center point of the uppermost unit cell C among a plurality of unit cells C stacked on top of each other.

[0089] In the control step (S30), the control unit 14 can control the operation of the stacking unit 13 according to the position information of the guide unit 11 and the position information of the unit cell C measured in the measurement step (S20). The control unit 14 can compare the position information of the guide unit 11 and the position information of the unit cell C measured by the measurement unit 12 and readjust the stacking operation of the stacking unit 13.

[0090] The control step (S30) may include a decision step (S31) and an adjustment step (S31).

[0091] In the decision step (S31), the control unit 14 can determine whether the first reference point R1 and the second reference point R2 coincide. In other words, the control unit 14 receives information on the first reference point R1 and the second reference point R2 measured by the measurement unit 12, and can determine whether the first reference point R1 and the second reference point R2 coincide in terms of position.

[0092] If the control unit 14 determines in the judgment step (S31) that the first reference point R1 and the second reference point R2 do not coincide, in the adjustment step (S32), the control unit 14 can readjust the stacking operation of the stacking unit 13. In other words, the control unit 14 can control the stacking unit 13 so that the first reference point R1 and the second reference point R2 coincide. To put it simply, the stacking unit 13 can be stacked by the control unit 14 so that the first reference point R1 and the second reference point R2 coincide.

[0093] The above description is merely illustrative of the technical concept of the present invention, and a person with ordinary skill in the art to which the present invention belongs could make various modifications and alterations without departing from the essential characteristics of the present invention.

[0094] Therefore, the embodiments disclosed in this invention are for illustrative purposes only, and not to limit the technical concept of the invention, and the scope of the technical concept of the invention is not limited by such embodiments.

[0095] The scope of protection of this invention should be interpreted in accordance with the appended claims, and all technical ideas within an equivalent scope should be interpreted as being included within the scope of the rights of this invention. [Explanation of Symbols]

[0096] 1 Unit Cell Stacking Device 10 Mounting plate 11 Guide section 12 Measuring part 13 Laminated section 14 Control Unit 100 connection port C Unit Cell R1 1st reference point R2 2nd reference point S10 Lamination Step S20 Measurement Step S30 Control step S31 Decision Step S32 Adjustment Step

Claims

1. A mounting plate on which multiple unit cells are placed in order so as to be stacked on top of each other, A guide portion connected to the aforementioned mounting plate and guiding the downward movement of the aforementioned mounting plate, A measuring unit that measures the position information of the guide section and the position information of the unit cell, A unit cell stacking apparatus comprising a stacking unit that stacks unit cells onto a mounting plate according to the position information of the guide unit and the position information of the unit cell measured by the measuring unit.

2. The mounting plate includes connecting openings formed through each corner, The unit cell stacking apparatus according to claim 1, wherein the guide portion is connected by penetrating the connecting port.

3. The unit cell stacking apparatus according to claim 2, wherein a plurality of unit cells are stacked on the mounting plate, and the mounting plate moves downward along the guide portion.

4. Multiple guide sections are formed so as to be positioned at each corner of the aforementioned mounting plate. The aforementioned measuring unit is The first reference point where multiple virtual lines connecting the multiple guide sections intersect is measured. The unit cell stacking apparatus according to claim 3, which measures a second reference point, which is the center point of the uppermost unit cell among a plurality of unit cells stacked on top of each other.

5. The unit cell stacking apparatus according to claim 4, wherein the stacking section stacks unit cells so that the first reference point and the second reference point coincide.

6. The unit cell stacking apparatus according to claim 4, further comprising a control unit that controls the operation of the stacking unit according to the position information of the guide unit and the position information of the unit cell measured by the measuring unit.

7. The unit cell stacking apparatus according to claim 6, wherein the control unit determines whether the first reference point and the second reference point coincide.

8. The unit cell stacking apparatus according to claim 6, wherein the control unit readjusts the stacking operation of the stacking section when it determines that the first reference point and the second reference point do not coincide.

9. The unit cell stacking apparatus according to claim 3, wherein the mounting plate moves downward along the guide portion, and the guide portion is formed to protrude above the mounting plate.

10. The unit cell stacking apparatus according to claim 9, wherein the stacking section stacks a plurality of unit cells sequentially on the aforementioned mounting plate such that the height of the upper surface of the unit cell located at the uppermost end of the plurality of unit cells is the same as the height of the upper surface of the guide section.

11. The unit cell stacking apparatus according to claim 3, wherein the height of the upper surface of the guide portion is kept constant.

12. The aforementioned connecting port is formed to penetrate along the stacking direction of the unit cell, The unit cell stacking apparatus according to claim 2, wherein the mounting plate moves along the guide portion in a direction aligned in the stacking direction of the unit cells.

13. Multiple guide sections are formed, The unit cell stacking apparatus according to any one of claims 1 to 12, wherein the center positions of the plurality of guide portions and the center positions of the unit cells stacked on the aforementioned mounting plate are the same.

14. The stacking step involves stacking multiple unit cells on a mounting plate by the stacking section, while the aforementioned mounting plate moves downward along a guide section that is connected through the aforementioned mounting plate, A measurement step in which the measuring unit measures the position information of the guide unit and the position information of the unit cell, A method for stacking unit cells, comprising: a control step in which a control unit controls the operation of the stacking section according to the position information of the guide section and the position information of the unit cell measured in the measurement step;

15. In the aforementioned lamination step, The method for stacking unit cells according to claim 14, wherein the mounting plate moves downward along the guide portion through connecting openings in which the guide portion is connected to each corner portion.

16. The method for stacking unit cells according to claim 15, wherein in the measurement step, the measuring unit measures a first reference point where a plurality of imaginary lines connecting a plurality of guide units intersect, and measures a second reference point which is the center point of the uppermost unit cell among a plurality of unit cells stacked on top of each other.

17. The control step described above is: The control unit performs a determination step in which it determines whether the first reference point and the second reference point coincide, A method for stacking unit cells according to claim 16, further comprising: an adjustment step in which the control unit readjusts the stacking operation of the stacking section if it is determined in the judgment step that the first reference point and the second reference point do not coincide.

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