Electrode assembly transfer tray

Abstract

The present invention discloses an electrode assembly transfer tray for a cylindrical battery. The electrode assembly transfer tray according to one aspect of the present invention is an electrode assembly transfer tray configured to accommodate an electrode assembly in which a laminate is wound around a winding shaft, and includes a bottom plate configured to support the electrode assembly. The bottom plate includes a placement portion, and the placement portion is located at one end on the extending direction of the winding shaft and is configured to accommodate a first accommodating portion configured to accommodate a first tab portion formed by winding a first plain portion, and a second accommodating portion located at the other end on the extending direction of the winding shaft and configured to accommodate a second tab portion formed by winding a second plain portion, and a support portion configured to support the main body portion.

Description

Technical Field

[0001] The present invention relates to an electrode assembly transfer tray for a cylindrical battery.

[0002] This application claims priority based on Korean Patent Application No. 10-2022-0068447 filed on June 3, 2022, and all the contents disclosed in the specification and drawings of the said application are incorporated into this application.

Background Art

[0003] Secondary batteries with high applicability to product groups and having electrical characteristics such as high energy density are widely applied not only to portable devices but also to electric vehicles (EVs), hybrid electric vehicles (HEVs), etc., which are driven by an electric drive source. Such secondary batteries have not only the primary advantage of being able to dramatically reduce the use of fossil fuels but also the advantage of generating no by-products from the use of energy, and thus are attracting attention as a new energy source that is environmentally friendly and improves energy efficiency.

[0004] Currently widely used types of secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, etc. The operating voltage of such a unit secondary battery cell, that is, a unit battery cell, is about 2.5V to 4.5V. Therefore, when a higher output voltage is required, a plurality of battery cells may be connected in series to form a battery pack. Also, depending on the charge and discharge capacity required for the battery pack, a plurality of battery cells may be connected in parallel to form a battery pack. Therefore, the number of battery cells included in the battery pack can be variously set according to the required output voltage and / or charge and discharge capacity.

[0005] On the one hand, in the case of a cylindrical battery, a separator, which is an insulator, is interposed between the positive electrode and the negative electrode, and this is wound up to form a jelly roll-shaped electrode assembly, which is inserted into the inside of a battery can together with an electrolytic solution to constitute a battery. And, strip-shaped electrode tabs can be connected to the plain portions of the positive electrode and the negative electrode respectively, and the electrode tabs electrically connect between the electrode assembly and the electrode terminals exposed to the outside. For reference, the positive electrode terminal is the cap plate of the sealing body that seals the opening of the battery can, and the negative electrode terminal is the battery can.

[0006] In the manufacturing process of such a cylindrical battery, it is necessary to transport the electrode assembly. In the case of conventional small cylindrical batteries having a form factor of 18650 or 21700, since the size and weight of the electrode assembly are not large, the cases where damage occurs during the transport of the electrode assembly are not so many.

[0007] However, when increasing the form factor for applying the cylindrical battery to an electric vehicle, since the size and weight of the electrode assembly increase, a new type of transport tray is required to prevent damage during the transport of the electrode assembly.

Summary of the Invention

Problems to be Solved by the Invention

[0008] The present invention has been made in view of the above problems, and its object is to provide an electrode assembly transport tray configured to minimize damage to the electrode assembly when transporting the electrode assembly wound by an electrode assembly winding device to an assembly facility.

[0009] However, the technical problems to be solved by the present invention are not limited to the above-described problems, and other problems not mentioned should be clearly understood by those skilled in the art from the description of the invention described below.

Means for Solving the Problems

[0010] The cylindrical battery according to an embodiment of the present invention includes a first electrode including a first plain portion, a second electrode including a second plain portion, and a separator interposed therebetween, and is configured to accommodate an electrode assembly in which a laminate including the first electrode, the second electrode, and the separator is wound around a winding axis. The electrode assembly conveyance tray includes a bottom plate configured to support the electrode assembly. The bottom plate includes a placement portion. The placement portion is located at one end in the extending direction of the winding axis and includes a first accommodating portion configured to accommodate a first tab portion formed by winding the first plain portion, and a second accommodating portion located at the other end in the extending direction of the winding axis and configured to accommodate a second tab portion formed by winding the second plain portion, and a support portion configured to support a main body portion located between the first tab portion and the second tab portion.

[0011] The bottom plate may be provided with a plurality of placement portions along at least one of a first direction parallel to the winding axis and a second direction perpendicular to the first direction.

[0012] The placement portion may have a groove shape configured to accommodate the electrode assembly.

[0013] The placement portion may be longer than the length of the electrode assembly along the winding axis.

[0014] The placement portion may be configured such that the first tab portion accommodated in the first accommodating portion and the second tab portion accommodated in the second accommodating portion do not contact the bottom plate.

[0015] The support portion may be configured such that a bottom surface formed inside thereof does not contact the main body portion of the electrode assembly.

[0016] The support portion may support the electrode assembly at a position lower than the winding axis of the electrode assembly.

[0017] The support portion may include a first support portion configured to support a first side of the main body portion and a second support portion configured to support a second side of the main body portion.

[0018] The first support portion and the second support portion may be configured to contact an outer peripheral surface of the main body portion.

[0019] At least a part of the first support portion and the second support portion may be configured to have the same radius of curvature as the radius of curvature of the outer peripheral surface of the main body portion.

[0020] The first support portion and the second support portion may be inclined with respect to the bottom surface at a predetermined angle and may be inclined in opposite directions to each other.

[0021] The bottom plate has a plurality of placement portions provided along at least one of a first direction parallel to the winding shaft and a second direction perpendicular to the first direction. The plurality of placement portions may be arranged such that a pair of adjacent placement portions along the second direction are spaced apart by a predetermined distance.

[0022] The first support portion and the second support portion may be formed discontinuously along the first direction.

[0023] The first support portion and the second support portion may have a discontinuous form at a position corresponding to a central portion along the first direction of the main body portion so as to be able to grip the outer peripheral surface of the electrode assembly in order to lift the electrode assembly.

[0024] The electrode assembly transfer tray may include a guide portion configured along an edge of the bottom plate to prevent the electrode assembly from detaching during transfer.

Advantages of the Invention

[0025] According to one aspect of the present invention, when transporting an electrode assembly with increased size and weight, it can be transported in a horizontally placed state, thus reducing the possibility of damage to the electrode assembly during transportation. Further, since the first tab portion and the second tab portion, which are relatively likely to be damaged by interference with the transport tray during the transport process, are not supported by the support portion, the possibility of damage to the first tab portion and the second tab portion during the transport of the electrode assembly can also be reduced.

[0026] According to another aspect of the present invention, since the placement portion is formed longer than the length of the electrode assembly, the outer peripheral surface and / or the end portions of the first tab portion and the second tab portion do not contact the bottom plate, so that the possibility of damage to the first tab portion and the second tab portion can be more effectively reduced. Also, in this case, in order to maximize the above-described effects, the transport path of the electrode assembly using the electrode assembly transport tray can be set to move only in a first direction parallel to the winding axis of the electrode assembly and a second direction perpendicular to the winding axis of the electrode assembly.

[0027] According to still another aspect of the present invention, since the lowermost portion of the electrode assembly does not contact the bottom surface, damage due to the load of the electrode assembly can be prevented.

[0028] According to still another aspect of the present invention, the support portion can stably support the main body portion of the electrode assembly from both sides.

[0029] According to still another aspect of the present invention, the guide portion can prevent the electrode assembly from detaching from the entire electrode assembly transport tray even if the electrode assembly detaches from the placement portion. Also, the handle portion facilitates the transport of the electrode assembly tray.

Brief Description of the Drawings

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Mode for Carrying Out the Invention

[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The drawings attached to this specification illustrate preferred embodiments of the present invention and are for the purpose of further interpreting the technical idea of the present invention together with the detailed description of the invention to be described later. Therefore, the present invention is not to be construed as being limited only to the matters described in such drawings. The same reference numerals refer to the same components. Also, in the drawings, the thickness, ratio, and dimensions of the components may be exaggerated for an effective explanation of the technical content.

[0032] The terms and words used in this specification and the claims are not to be construed as being limited to their ordinary or dictionary meanings. The inventor interprets them in accordance with the meaning and concept corresponding to the technical idea of the present invention in accordance with the principle that the inventor can appropriately define the concept of the terms in order to explain the invention in the best way.

[0033] In this specification, terms indicating directions such as up, down, left, right, front, and back are used, but these terms are merely for convenience of explanation and it is obvious to those skilled in the art of the present invention that they may vary depending on the position of the object in question and the position of the observer.

[0034] Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. There may be various equivalents and modified embodiments that can replace them at the time of this application.

[0035] FIG. 1 is a diagram showing a first electrode and a second electrode of an electrode assembly conveyed by an electrode assembly conveying tray according to an embodiment of the present invention. FIG. 2 is a diagram showing a state before the electrode assembly conveyed by the electrode assembly conveying tray according to an embodiment of the present invention is wound up, and is a diagram showing a laminate including a first electrode, a second electrode, and a separator. FIG. 3 is a cross-sectional view showing the electrode assembly moved by the electrode assembly conveying tray according to an embodiment of the present invention.

[0036] Referring to FIGS. 1 to 3, the electrode assembly 100 conveyed by the electrode assembly conveyance tray 1 according to an embodiment of the present invention may include a first electrode 10, a second electrode 20, and a separator 30.

[0037] The first electrode 10 may include a first non-coated portion 11. The first electrode 10 may have the first electrode active material applied to at least a part of one side or both sides thereof, and may include the first non-coated portion 11 where the first electrode active material is not applied at one end thereof. The first non-coated portion 11 may be provided along the winding direction (the extending direction of the X-axis) at one end of the first electrode 10. The first electrode 10 may be a negative electrode or a positive electrode.

[0038] The second electrode 20 may include a second non-coated portion 21. The second electrode 20 may have the second electrode active material applied to at least a part of one side or both sides thereof, and may include the second non-coated portion 21 where the second electrode active material is not applied at one end thereof. The second non-coated portion 21 may be provided along the winding direction (the extending direction of the X-axis) at one end of the second electrode 20. The second electrode 20 may be a positive electrode or a negative electrode having a polarity opposite to that of the first electrode 10.

[0039] The separator 30 may be interposed between the first electrode 10 and the second electrode 20. The separator 30 may be a porous polymer film, for example, a porous polymer film containing at least one polymer selected from polyolefin-based polymers such as ethylene homopolymer, propylene homopolymer, ethylene / butene copolymer, ethylene / hexene copolymer, ethylene / methacrylate copolymer, etc., and may be used alone or by laminating a plurality of polymer films. As another example, the separator 30 may use a normal porous non-woven fabric, for example, a non-woven fabric such as high melting point glass fiber, polyethylene terephthalate fiber, etc.

[0040] The electrode assembly 100 can be manufactured by winding a laminate 100' including a first electrode 10, a second electrode 20, and a separator 30 around a winding axis (a direction parallel to the Z-axis). The laminate 100' can be formed by laminating at least once with the first electrode 10 and the second electrode 20 having the separator 30 interposed therebetween. The electrode assembly 100 can include a central hole C formed by winding the laminate 100' around a winding axis (a direction parallel to the Z-axis).

[0041] FIG. 4 is a perspective view showing an electrode assembly moved by an electrode assembly transfer tray according to an embodiment of the present invention.

[0042] Referring to FIG. 4, in the electrode assembly 100, the laminate 100' can be wound to form a first tab portion 110, a second tab portion 120, and a main body portion 130.

[0043] The first tab portion 110 can be formed by winding a first plain portion 11. The first tab portion 110 can be located at one end (an end portion located in the positive direction of the Z-axis) on one side in the extending direction of the winding axis (a direction parallel to the Z-axis). This is to enable at least a part of the first plain portion 11 exposed outside the separator 30 to be used as an electrode tab by itself. At least a part of the first plain portion 11 can include a plurality of segmented pieces (segments) divided along the winding direction (the extending direction of the X-axis) of the electrode assembly 100. The plurality of segmented pieces can be bent along the radial direction of the electrode assembly 100. The plurality of bent segmented pieces can be superposed multiple times. Therefore, in the first tab portion 110, the plurality of segmented pieces can be superposed multiple times to form a surface. However, the first tab portion 110 may have a shape in which the plurality of segmented pieces are completely bent along the radial direction of the electrode assembly 100, or may have a shape bent by a certain angle.

[0044] The second tab portion 120 can be formed by winding the second non-patterned portion 21. The second tab portion 120 can be located at the other end (the end located in the negative Z-axis direction) in the extending direction of the winding axis (the direction parallel to the Z-axis). This is to enable at least a part of the second non-patterned portion 21 exposed outside the separator 30 to be used as an electrode tab by itself. At least a part of the second non-patterned portion 21 can include a plurality of segmented pieces divided along the winding direction of the electrode assembly 100. The plurality of segmented pieces can be bent along the radial direction of the electrode assembly 100. The plurality of bent segmented pieces can be superposed multiple times. Therefore, in the second tab portion 120, the plurality of segmented pieces can be superposed multiple times to form a surface. However, the second tab portion 120 may have a shape in which the plurality of segmented pieces are completely bent along the radial direction of the electrode assembly 100, or may have a shape bent by a certain angle.

[0045] The main body portion 130 can be located between the first tab portion 110 and the second tab portion 120. The main body portion 130 can be formed by winding the portion corresponding to the portion where the first electrode active material of the first electrode 10 and / or the portion where the second electrode active material of the second electrode 20 is applied.

[0046] FIG. 5 is a perspective view showing an electrode assembly transfer tray according to an embodiment of the present invention. FIG. 6 is a plan view showing an electrode assembly transfer tray according to an embodiment of the present invention. FIG. 7 is a cross-sectional view taken along line A-A' of FIG. 6.

[0047] Referring to FIGS. 5 to 7, the electrode assembly transfer tray 1 can include a bottom plate 200.

[0048] The bottom plate 200 can be configured to support the electrode assembly 100. The bottom plate 200 may include a placement portion 210. The placement portion 210 can be configured to accommodate the electrode assembly 100. The placement portion 210 may have a groove shape configured to accommodate the electrode assembly 100. The placement portion 210 can be configured to horizontally place the electrode assembly 100. A plurality of placement portions 210 may be provided. The plurality of placement portions 210 may be provided along at least one of a first direction (a direction parallel to the Z-axis, which is the winding axis direction of the electrode assembly) and a second direction (a direction parallel to the Y-axis, which is perpendicular to the first direction). For example, the placement portions 210 may be arranged in 10 rows along the first direction (a direction parallel to the Z-axis) and in 6 rows along the second direction (a direction parallel to the Y-axis).

[0049] FIG. 8 is an enlarged view of a partial region of FIG. 6. FIG. 9 is a view showing a state in which the electrode assembly is accommodated in the placement portion of the electrode assembly transfer tray according to an embodiment of the present invention.

[0050] Referring to FIGS. 8 and 9, the placement portion 210 may include a first accommodation portion 211, a second accommodation portion 212, and a support portion 213. The first accommodation portion 211 and the second accommodation portion 212 may be formed on both sides of the longitudinal direction (the extending direction of the Z-axis) of the support portion 213, respectively.

[0051] The first accommodation portion 211 may be formed at a position corresponding to the first tab portion 110. The first accommodation portion 211 can be configured to accommodate the first tab portion 110. The first accommodation portion 211 may have a groove shape configured to accommodate the first tab portion 110. The first accommodation portion 211 can be configured to accommodate the first tab portion 110 of the horizontally placed electrode assembly 100. The first accommodation portion 211 can be configured not to support the first tab portion 110 accommodated in the first accommodation portion 211.

[0052] The second housing portion 212 may be formed at a position corresponding to the second tab portion 120. The second housing portion 212 may be configured to house the second tab portion 120. The second housing portion 212 may have a groove shape configured to house the second tab portion 120. The second housing portion 212 may be configured to house the second tab portion 120 of the electrode assembly 100 in a horizontal state. The second housing portion 212 may be configured not to support the second tab portion 120 housed in the second housing portion 212.

[0053] The support portion 213 may be configured to support the main body portion 130. The support portion 213 may be configured to support the main body portion 130 of the electrode assembly 100 in a horizontal state.

[0054] According to such a configuration according to an embodiment of the present invention, when transporting the electrode assembly 100 with an increased size and weight, it is possible to transport it in a horizontally placed state, so that the possibility of damage to the electrode assembly 100 during transportation can be reduced. Further, since the first tab portion 110 and the second tab portion 120, which are relatively likely to be damaged by interference with the transport tray during the transport process, are not supported by the support portion 213, the possibility of damage to the first tab portion 110 and the second tab portion 120 during transportation of the electrode assembly 100 can also be reduced.

[0055] Returning to FIGS. 8 to 9, the detailed structure of the placement portion 210 will be described.

[0056] The length L1 of the placement portion 210 may be longer than the length L2 of the electrode assembly 100 along the winding axis (direction parallel to the Z-axis). The support portion 213 of the placement portion 210 may be configured to have substantially the same length as the main body portion 130 of the electrode assembly 100, the first housing portion 211 of the placement portion 210 may be configured to have a length substantially longer than the first tab portion 110 of the electrode assembly 100, and the second housing portion 212 of the placement portion 210 may be configured to have a length substantially longer than the second tab portion 120 of the electrode assembly 100.

[0057] The placement part 210 can be configured such that the first tab part 110 accommodated in the first accommodation part 211 does not contact the bottom plate 200. The placement part 210 can be configured such that the second tab part 120 accommodated in the second accommodation part 212 does not contact the bottom plate 200.

[0058] Referring to FIGS. 3 and 4 in conjunction with FIGS. 8 and 9, the placement part 210 can be configured such that the outer peripheral surfaces and end parts of the first tab part 110 and the second tab part 120 do not contact the bottom plate 200. On the other hand, when the first tab part 110 and / or the second tab part 120 of the electrode assembly 100 has a structure bent along the radial direction of the electrode assembly 100, the placement part 210 can be configured such that the surfaces formed by bending the first tab part 110 and the second tab part 120 do not contact the bottom plate 200.

[0059] According to such a configuration according to an embodiment of the present invention, since the placement part 210 is formed longer than the length of the electrode assembly 100, the outer peripheral surfaces and / or end parts of the first tab part 110 and the second tab part 120 do not contact the bottom plate 200, and as a result, the possibility of damage to the first tab part 110 and the second tab part 120 can be more effectively reduced. Further, in this case, in order to maximize the above effect, the conveyance path of the electrode assembly 100 using the electrode assembly conveyance tray 1 can be set to move only in a first direction (a direction parallel to the winding axis (direction parallel to the Z-axis) of the electrode assembly 100) and a second direction (a direction parallel to the Y-axis) perpendicular to the winding axis (direction parallel to the Z-axis) of the electrode assembly 100.

[0060] FIG. 10 is a view showing a state in which an electrode assembly according to an embodiment of the present invention shown in FIG. 7 is accommodated in a conveyance tray. FIG. 11 is a view showing a state in which an electrode assembly is accommodated in an electrode assembly conveyance tray according to another embodiment of the present invention.

[0061] Referring to FIGS. 10 and 11, the detailed structure of the support part 213 of the placement part 210 will be described in detail.

[0062] The support portion 213 can be configured such that the bottom surface B formed inside thereof does not contact the main body portion 130 of the electrode assembly 100. The support portion 213 can support the electrode assembly 100 at a position lower than the winding axis (direction parallel to the Z-axis) of the electrode assembly 100. The support portion 213 can support the main body portion 130 of the electrode assembly 100 such that the electrode assembly 100 is in a state of being substantially floating from the bottom surface B.

[0063] According to such a configuration according to the embodiment of the present invention, since the lowermost portion of the electrode assembly 100 does not contact the bottom surface B, damage due to the load of the electrode assembly 100 can be prevented.

[0064] Returning to FIGS. 10 and 11, the support portion 213 may include a first support portion 213a and a second support portion 213b.

[0065] The support portion 213 can support the main body portion 130 by the first support portion 213a and the second support portion 213b on both sides thereof along a first direction (direction parallel to the Z-axis) parallel to the winding axis (direction parallel to the Z-axis) of the electrode assembly 100 and a second direction (direction parallel to the Y-axis) perpendicular to the winding axis (direction parallel to the Z-axis) of the electrode assembly 100.

[0066] The first support portion 213a may be configured to support the first side (negative direction of the Y-axis) of the main body portion 130. The first support portion 213a may be configured to contact the outer peripheral surface of the main body portion 130. As shown in FIG. 10, the first support portion 213a may be inclined so as to have a predetermined angle with respect to the bottom surface B. At least a part of the first support portion 213a may have the same radius of curvature as the radius of curvature of the outer peripheral surface of the main body portion 130, as shown in FIG. 11. The first support portion 213a may be inclined in a direction opposite to that of the second support portion 213b. The first support portion 213a may be inclined at about 50 degrees to 80 degrees with respect to the bottom surface B. The first support portion 213a may be inclined at about 60 degrees to 80 degrees with respect to the bottom surface B. The first support portion 213a may be inclined at about 65 degrees to 75 degrees with respect to the bottom surface B. The first support portion 213a may be inclined at about 68 degrees to 72 degrees with respect to the bottom surface B. The first support portion 213a may be inclined at about 70 degrees with respect to the bottom surface B.

[0067] The second support portion 213b may be configured to support the second side surface (positive direction of the Y-axis) of the main body portion 130. The second support portion 213b may be configured to contact the outer peripheral surface of the main body portion 130. As shown in FIG. 10, the second support portion 213b may be inclined so as to have a predetermined angle with respect to the bottom surface B. At least a part of the second support portion 213b may have the same radius of curvature as the radius of curvature of the outer peripheral surface of the main body portion 130, as shown in FIG. 11. The second support portion 213b may be inclined in a direction opposite to that of the first support portion 213a. The second support portion 213b may be inclined at about 50 degrees to 80 degrees with respect to the bottom surface B. The second support portion 213b may be inclined at about 60 degrees to 80 degrees with respect to the bottom surface B. The second support portion 213b may be inclined at about 65 degrees to 75 degrees with respect to the bottom surface B. The second support portion 213b may be inclined at about 68 degrees to 72 degrees with respect to the bottom surface B. The second support portion 213b may be inclined at about 70 degrees with respect to the bottom surface B.

[0068] According to such a configuration according to an embodiment of the present invention, the support portion 213 can stably support the main body portion 130 of the electrode assembly 100 from both sides. In particular, when the inclination angles of the first support portion 213a and the second support portion 213b are formed as described above, the floating of the electrode assembly 100 can be minimized at an optimal formation angle.

[0069] FIG. 12 is a view showing a part of a cross section taken along line B-B' of FIG. 6. FIG. 13 is a view showing a state in which the electrode assembly is accommodated in the electrode assembly transfer tray shown in FIG. 12.

[0070] With reference to FIGS. 5 and 6 in combination with FIGS. 12 and 13, the detailed structures of the first support portion 213a and the second support portion 213b, and the arrangement relationship between a pair of mounting portions 210 adjacent to each other along the second direction will be described in detail.

[0071] Referring to FIGS. 12 and 13, the first support portion 213a and the second support portion 213b may be formed discontinuously along the first direction (a direction parallel to the X axis). The first support portion 213a and the second support portion 213b may have a tapered shape that narrows toward the bottom surface B. The first support portion 213a and the second support portion 213b may include a discontinuous region S formed at a position corresponding to the central portion of the main body portion 130 along the first direction (a direction parallel to the Z axis). The discontinuous region S of the first support portion 213a and the discontinuous region S of the second support portion 213b may be symmetric along the second direction (a direction parallel to the Y axis).

[0072] The outer peripheral surface of the electrode assembly 100 may be exposed to a substantially trapezoidal opening formed by the discontinuous region S. The outer peripheral surface of the electrode assembly 100 exposed through the trapezoidal opening can be gripped and lifted by an operator or a lifting jig.

[0073] Referring to FIGS. 5 and 6 together, a plurality of placement portions 210 may be arranged such that a pair of placement portions 210 adjacent to each other along the second direction (a direction parallel to the Y-axis) are separated by a predetermined distance. The predetermined distance may be set so as to secure a space into which a lifting jig configured to be able to grip and lift the hand of an operator or the outer peripheral surface of the electrode assembly 100 is inserted.

[0074] Returning to FIGS. 5 to 7, the electrode assembly transfer tray 1 may include a guide portion 220.

[0075] The guide portion 220 may be configured along the edge of the bottom plate 200 so that the electrode assembly 100 does not come off during transfer. The guide portion 220 may have a shape protruding in the negative X-axis direction along the edge of the bottom plate 200. The guide portion 220 may be four plates coupled along the edge of the bottom plate 200.

[0076] The guide portion 220 may include a handle portion 221 configured to be lifted during transfer.

[0077] The handle portion 221 is an opening formed in the guide portion 220, and a hand of an operator or a hook connected to a lifting jig can be hooked thereon. A plurality of handle portions 221 may be provided.

[0078] According to such a configuration according to an embodiment of the present invention, the guide portion 220 can prevent the electrode assembly 100 from coming off the entire electrode assembly transfer tray 1 even if the electrode assembly 100 comes off the placement portion 210. Further, the handle portion 221 facilitates the transfer of the electrode assembly 100 tray.

[0079] As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and it goes without saying that various modifications and variations are possible by those having ordinary knowledge in the technical field to which the present invention belongs within the equivalent scope of the technical idea of the present invention and the appended claims.

Explanation of Reference Numerals

[0080] 1 Electrode assembly transfer tray 10 First electrode 11 First plain part 20 Second electrode 21 Second plain part 30 Separator 110 First tab part 120 Second tab part 130 Body part 100’ Laminate 100 Electrode assembly C Take-up shaft 200 Bottom plate B Bottom surface 210 Placement part 211 First accommodation part 212 Second accommodation part 213 Support part 213a First support part 213b Second support part S Discontinuous region 220 Guide part 221 Handle part

Claims

1. An electrode assembly transfer tray configured to accommodate an electrode assembly, wherein the electrode assembly includes a first electrode including a first non-patterned portion, a second electrode including a second non-patterned portion, and a separator interposed therebetween, and a laminate including the first electrode, the second electrode, and the separator is wound around a winding shaft, the electrode assembly transfer tray includes a bottom plate configured to support the electrode assembly, the bottom plate is provided with a placement portion, the placement portion, a first accommodating portion located at one end in the extending direction of the winding shaft and configured to accommodate a first tab portion formed by winding the first non-patterned portion, a second accommodating portion located at the other end in the extending direction of the winding shaft and configured to accommodate a second tab portion formed by winding the second non-patterned portion, and a support portion configured to support a main body portion located between the first tab portion and the second tab portion, An electrode assembly transfer tray comprising the above.

2. The bottom plate, wherein a plurality of the placement portions are provided along at least one of a first direction parallel to the winding shaft and a second direction perpendicular to the first direction. The electrode assembly transfer tray according to claim 1.

3. The placement portion, has a groove shape configured to accommodate the electrode assembly. The electrode assembly transfer tray according to claim 1.

4. The placement portion, is longer than the length of the electrode assembly along the winding shaft. The electrode assembly transfer tray according to any one of claims 1 to 3.

5. The placement portion, is configured such that the first tab portion accommodated in the first accommodating portion and the second tab portion accommodated in the second accommodating portion do not contact the bottom plate. The electrode assembly transfer tray according to any one of claims 1 to 3.

6. The support portion, is configured such that a bottom surface formed inside thereof does not contact the main body portion of the electrode assembly. The electrode assembly transfer tray according to any one of claims 1 to 3.

7. The support portion, supports the electrode assembly at a position lower than the winding shaft of the electrode assembly. The electrode assembly transfer tray according to claim 6.

8. The support portion, a first support portion configured to support a first side of the main body portion, a second support portion configured to support a second side of the main body portion, The electrode assembly transfer tray according to claim 6, including

9. The first support portion and the second support portion are The electrode assembly transfer tray according to claim 8, configured to contact the outer peripheral surface of the main body portion.

10. The first support portion and the second support portion are The electrode assembly transfer tray according to claim 9, configured such that at least a part thereof has the same radius of curvature as the radius of curvature of the outer peripheral surface of the main body portion.

11. The first support portion and the second support portion are The electrode assembly transfer tray according to claim 9, inclined so as to have a predetermined angle with respect to the bottom surface and inclined in opposite directions to each other.

12. The bottom plate is A plurality of the mounting portions are provided along at least one of a first direction parallel to the winding shaft and a second direction perpendicular to the first direction, Among the plurality of mounting portions, The electrode assembly transfer tray according to claim 8, wherein a pair of adjacent mounting portions along the second direction are arranged so as to be separated by a predetermined distance.

13. The first support portion and the second support portion are The electrode assembly transfer tray according to claim 12, formed discontinuously along the first direction.

14. The first support portion and the second support portion are The electrode assembly transfer tray according to claim 13, having a discontinuous form at a position corresponding to the central portion along the first direction of the main body portion so as to be able to grip the outer peripheral surface of the electrode assembly in order to lift the electrode assembly.

15. The transfer tray of the electrode assembly is The electrode assembly transfer tray according to any one of claims 1 to 3, comprising a guide portion configured along an edge portion of the bottom plate to prevent the electrode assembly from detaching during conveyance.

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