Electrode assembly holder and electrode tray comprising same

Abstract

An electrode assembly holder is provided according to exemplary embodiments. The electrode assembly holder may comprise: a hollow cylindrical sidewall portion; a support surrounded by the sidewall portion and spaced apart from the sidewall portion; and bridges connecting the sidewall portion and the support. Each of the bridges may be inclined with respect to the inner surface of the sidewall portion.

Description

Electrode assembly holder and electrode tray including the same

[0001] The present invention relates to an electrode assembly holder and an electrode tray including the same. The present application claims the benefit of Korean application No. 10-2025-0001953, filed on January 7, 2025, which is incorporated herein by reference in its entirety.

[0002] Unit cells of secondary batteries are classified into cylindrical, prismatic, and pouch types depending on the type of case. In the case of cylindrical batteries, an insulating separator is interposed between a positive electrode and a negative electrode coated with active material, and this is wound to form a jelly roll-shaped electrode assembly, which is then inserted into a battery can to constitute the battery.

[0003] As a type of cylindrical battery, a tabless cylindrical battery cell comprising a tabless electrode assembly is presented. The tabless electrode assembly has a structure in which a positive electrode comprising segments of a non-existent portion on one long side and a negative electrode comprising segments of a non-existent portion on one long side are wound. The segments of the non-existent portion of the positive electrode protrude to the bottom of the electrode assembly, and the segments of the non-existent portion of the negative electrode protrude to the top of the electrode assembly. The segments of the non-existent portion protruding to the top and bottom are welded to the upper current collection plate and the lower current collection plate, respectively, and can be inserted into the battery can.

[0004] In the manufacturing process of tapless cylindrical battery cells, it is necessary to transport electrode assemblies in the form of wound jelly rolls. To prevent damage to the segments of the unbounded sections at both ends of the tapless electrode assemblies, the assemblies were transported by horizontally stacking them on trays. However, there was a problem in that existing equipment had to be modified or new equipment manufactured when vertical stacking was required. Consequently, a new type of transport tray was needed to vertically stack and transport tapless electrode assemblies without damaging the unbounded sections.

[0005] The problem that the technical concept of the present invention aims to solve is to provide an electrode assembly holder capable of storing and transporting an electrode assembly without damage.

[0006] According to exemplary embodiments of the present invention for solving the above-described problem, an electrode assembly holder is provided. The electrode assembly holder may include a hollow cylindrical side wall portion; a support member surrounded by the side wall portion and spaced apart from the side wall portion; and bridges connecting the side wall portion and the support member. Each of the bridges may be oblique with respect to the inner surface of the side wall portion.

[0007] Each of the above bridges may be inclined with respect to the support.

[0008] The above support may be perpendicular to the above side wall.

[0009] One end of each of the above bridges may be connected to the inner surface of the side wall. The other end of each of the above bridges may be connected to the support. One end of each of the above bridges may be closer to the bottom surface of the side wall than the other end of each of the above bridges.

[0010] The bottom surface of the above support may be located at a different level from the bottom surface of the side wall in the direction of extension of the side wall.

[0011] The above support may include a hollow.

[0012] The above support may be ring-shaped.

[0013] The above bridges can be spaced apart from each other.

[0014] The above bridges can be spaced apart from each other at equal intervals.

[0015] The electrode assembly holder may include a receiving space defined by the inner surface of the side wall portion; and an exhaust space surrounded by the side wall portion but separated from the receiving space by the support and the bridges.

[0016] The electrode assembly holder may further include a first hole of the support and second holes between the bridges. The receiving space may be in communication with the discharge space through the first hole and the second holes.

[0017] The number of the above second holes may be 2 or more and 10 or less.

[0018] Each of the above bridges may form an acute angle with respect to the inner surface of the side wall portion defining the receiving space.

[0019] The above-mentioned receiving space may be configured to accommodate an electrode assembly in the form of a jelly roll. The electrode assembly may include segments of the unwound portion folded toward the winding center at both ends. The support may support the segments of the unwound portion of the electrode assembly.

[0020] According to exemplary embodiments of the present invention for solving the above-described problem, an electrode tray is provided. The electrode tray may include a plurality of electrode assembly holders as described above; and a bottom plate that supports the electrode assembly holders from below.

[0021] According to exemplary embodiments of the present invention, tabletless electrode assemblies can be transported by vertically loading them onto a tray. Holes are provided in the bottom portion of the electrode tray so that the electrode assemblies can be transported without damage to the electrode assemblies.

[0022] The effects obtainable from the exemplary embodiments of the present invention are not limited to those mentioned above, and other unmentioned effects can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure belong from the following description. That is, unintended effects resulting from the implementation of the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0023] FIG. 1 is an unfolded view showing the state of electrodes before winding according to exemplary embodiments.

[0024] FIG. 2 is a cross-sectional view showing a jelly roll-shaped electrode assembly according to exemplary embodiments.

[0025] FIG. 3 is a perspective view showing an electrode tray according to exemplary embodiments.

[0026] FIG. 4 is a cross-sectional view showing an electrode assembly holder according to exemplary embodiments.

[0027] FIG. 5 is a layout diagram showing an electrode assembly holder according to exemplary embodiments.

[0028] FIG. 6 is a flowchart illustrating a method for manufacturing a cylindrical battery according to exemplary embodiments.

[0029] FIG. 7 is a cross-sectional view showing a cylindrical battery according to exemplary embodiments.

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe his invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention.

[0031] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0032] In addition, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted.

[0033] Since embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or schematically depicted for clearer explanation. Accordingly, the size or proportion of each component does not entirely reflect the actual size or proportion.

[0034]

[0035] (1st embodiment)

[0036] FIG. 1 is an unfolded view showing electrodes (10, 20) according to exemplary embodiments. FIG. 1 shows the state of the electrodes (10, 20) before winding. FIG. 2 is a cross-sectional view showing a jelly roll-shaped electrode assembly (30) according to exemplary embodiments.

[0037] FIG. 3 is a perspective view showing an electrode tray (100) according to exemplary embodiments. FIG. 4 is a cross-sectional view showing a holder (110) of an electrode tray (100) according to exemplary embodiments. FIG. 5 is a layout view of a holder (110) of an electrode tray (100) according to exemplary embodiments.

[0038]

[0039] Referring to FIGS. 1 and 2, a jelly roll-shaped electrode assembly (30) can be formed by sequentially stacking a first electrode (10), a separator, a second electrode (20), and a separator to form an electrode stack, and then winding the electrode stack along the length direction (Y direction). The winding axis portion of the jelly roll-shaped electrode assembly (30) may be empty. The length direction (Y direction) of each of the first electrode (10) and the second electrode (20) may correspond to the circumferential direction of the jelly roll-shaped electrode assembly (30). The width direction (Z direction) of each of the first electrode (10) and the second electrode (20) may correspond to the winding axis direction of the jelly roll-shaped electrode assembly (30). The normal direction (X direction) of the surface of each of the first electrode (10) and the second electrode (20) may correspond to the radial direction of the jelly roll-shaped electrode assembly (30).

[0040]

[0041] The first electrode (10) may include a current collector and an active material layer. The portion of the first electrode (10) coated with the active material may be a retaining portion (11). The portion of the first electrode (10) not coated with the active material may be an uncoated portion (12). The current collector may be exposed in the uncoated portion (12).

[0042] The unworn portion (12) may include segments (12S) arranged in the Y direction. The segments (12S) may be folded independently. In a jelly roll-shaped electrode assembly (30), each of the segments (12S) may be folded toward the winding center of the jelly roll-shaped electrode assembly (30).

[0043] According to exemplary embodiments, the first electrode (10) may be an anode. The first electrode (10) may include an aluminum foil as a current collector. The first electrode (10) may be a positive electrode active material such as LiCoO2, LiNiO2, or LiNi 1-x Co x O2(0.2≤x≤0.5), LiNi 1 / 3 Mn 1 / 3 Co1 / 3 O2, LiNi 0.5 Mn 0.5 O2, LiMn2O4, LiMn 2-x M x O4 (M may include Al or Li, etc.), or LiFePO4, etc.

[0044]

[0045] The second electrode (20) may include a current collector and an active material layer. The portion of the second electrode (20) coated with the active material may be a retaining portion (21). The portion of the second electrode (20) not coated with the active material may be an uncoated portion (22). The current collector may be exposed in the uncoated portion (22).

[0046] The unworn portion (22) may include segments (22S) arranged in the Y direction. The segments (22S) may be folded independently. In the jelly roll-shaped electrode assembly (30), each of the segments (22S) may be folded toward the winding center of the jelly roll-shaped electrode assembly (30).

[0047] According to exemplary embodiments, the second electrode (20) may be a negative electrode. The second electrode (20) may include a copper foil or a nickel foil as a current collector. The second electrode (20) may include lithium metal, graphite, coke, silicon, tin, etc. as a negative electrode active material.

[0048]

[0049] The electrode assembly (30) may be a tab-less type electrode assembly. The electrode assembly (30) may include segments (12S) of the unoccupied portion (12) of the first electrode (10) protruding from the bottom of the electrode assembly (30), and segments (22S) of the unoccupied portion (22) of the second electrode (20) protruding from the top of the electrode assembly (30). Each of the segments (12S, 22S) of the unoccupied portions (12, 22) may be folded toward the winding center of the electrode assembly (30). Each of the segments (12S, 22S) of the unoccupied portions (12, 22) of the electrode assembly (30) may be welded to current collection plates (205A, 205B in FIG. 7) during the cell assembly process.

[0050]

[0051] Referring to FIGS. 1 to 5, the electrode tray (100) may be a tray for transporting an electrode assembly (30) in the form of a jelly roll. For example, the electrode tray (100) may be used for transporting the electrode assembly (30) to insert the electrode assembly (30) into a can after the winding process of the electrode assembly (30). The electrode tray (100) may include a plurality of holders (110) and a bottom plate (105). The plurality of holders (110) may be placed on the bottom plate (105). The bottom plate (105) may support the plurality of holders (110) from below.

[0052] The holder (110) may be configured to accommodate an electrode assembly (30). The electrode assembly (30) may be loaded into the holder (110) such that the unworn portion (12) of the first electrode (10) faces downward in the Z direction and the unworn portion (22) of the second electrode (20) faces upward in the Z direction.

[0053]

[0054] Referring to FIGS. 4 and 5, the holder (110) may include a side wall (111), a support (112), and bridges (113).

[0055]

[0056] The side wall portion (111) may include a top surface (111TS), inner surfaces (111IS1, 111IS2), and a bottom surface (111BS).

[0057] The top surface (111TS) of the side wall (111) may be the upper surface of the side wall (111) in the Z direction. An opening into which an electrode assembly (30 in FIG. 2) is inserted may be formed in the top surface (111TS). The bottom surface (111BS) of the side wall (111) may be the lower surface of the side wall (111) in the Z direction. The top surface (111TS) may be spaced apart from the bottom surface (111BS) in the Z direction.

[0058] The inner surfaces (111IS1, 111IS2) of the side wall portion (111) may define a receiving space (114). The inner surface (111IS1) may be substantially perpendicular to the Y direction. According to exemplary embodiments, the width of the receiving space (114) in the Y direction defined by the inner surface (111IS1) may be substantially the same along the Z direction.

[0059] The inner surface (111IS2) may be slanted in the Y direction. The width in the Y direction of the receiving space (114) defined by the inner surface (111IS2) may be greatest at the top in the Z direction (i.e., the entrance of the holder (110)). According to exemplary embodiments, the width in the Y direction of the receiving space (114) defined by the inner surface (111IS2) may gradually increase toward the top in the Z direction.

[0060] When the electrode assembly (30) is mounted on the holder (110), if an alignment error occurs between the electrode assembly (30) and the holder (110), the electrode assembly (30) can be guided along the inclined inner surface (111IS2) and loaded into the receiving space (114). Accordingly, the alignment error between the electrode assembly (30) and the holder (110) can be compensated.

[0061]

[0062] The support (112) can support a jelly roll-shaped electrode assembly (30 in FIG. 2) inserted into a receiving space (114) from below. The support (112) can support a plurality of bent segments (12S in FIG. 2) of the unincorporated portion (12 in FIG. 2) of the first electrode (10 in FIG. 2) of the electrode assembly (30).

[0063] The support (112) may be surrounded by the side wall (111). The support (112) may be substantially perpendicular to the side wall (111). The support (112) may be spaced apart by a distance (D2) from the inner surface (111IS1) of the side wall (111). According to exemplary embodiments, the distance (D2) may be about 0.5 mm or more. According to exemplary embodiments, the distance (D2) may be about 1.0 mm or more. According to exemplary embodiments, the distance (D2) may be about 1.5 mm or more. According to exemplary embodiments, the distance (D2) may be about 2.0 mm or more. According to exemplary embodiments, the distance (D2) may be about 4.0 mm or less. According to exemplary embodiments, the distance (D2) may be about 3.5 mm or less. According to exemplary embodiments, the distance (D2) may be about 3.0 mm or less. According to exemplary embodiments, the distance (D2) may be about 2.5 mm or less. According to exemplary embodiments, the distance (D2) may be about 2.2 mm or less.

[0064] The support (112) may have a width (D3) (or diameter) in a direction perpendicular to the Z direction. According to exemplary embodiments, the width (D3) may be about 10 mm or more. According to exemplary embodiments, the width (D3) may be about 12 mm or more. According to exemplary embodiments, the width (D3) may be about 14 mm or more. According to exemplary embodiments, the width (D3) may be about 16 mm or more. According to exemplary embodiments, the width (D3) may be about 24 mm or less. According to exemplary embodiments, the width (D3) may be about 22 mm or less. According to exemplary embodiments, the width (D3) may be about 20 mm or less. According to exemplary embodiments, the width (D3) may be about 18 mm or less.

[0065] The support (112) may have a hollow structure. That is, the support (112) may include a hole (112H). According to exemplary embodiments, the hole (112H) may be circular. According to exemplary embodiments, the support (112) may be ring-shaped.

[0066] The hole (112H) of the support (112) may have a width (D4) (or diameter) in a direction perpendicular to the Z direction. According to exemplary embodiments, the width (D4) may be about 2 mm or more. According to exemplary embodiments, the width (D4) may be about 4 mm or more. According to exemplary embodiments, the width (D4) may be about 6 mm or more. According to exemplary embodiments, the width (D4) may be about 8 mm or more. According to exemplary embodiments, the width (D4) may be about 16 mm or less. According to exemplary embodiments, the width (D4) may be about 14 mm or less. According to exemplary embodiments, the width (D4) may be about 12 mm or less. According to exemplary embodiments, the width (D4) may be about 10 mm or less.

[0067] The support (112) may include a bottom surface (112B) and a top surface (112T). The bottom surface (112B) may be the lower surface in the Z direction of the support (112). The top surface (112T) may be the upper surface in the Z direction of the support (112). The bottom surface (112B) and the top surface (112T) may be substantially parallel. The bottom surface (112B) and the top surface (112T) may be spaced apart from each other in the Z direction.

[0068] According to exemplary embodiments, the bottom surface (112B) of the support (112) may be located at a different level in the Z direction from the bottom surface (111BS) of the side wall (111). According to exemplary embodiments, the bottom surface (112B) of the support (112) may be located at a higher level in the Z direction than the bottom surface (111BS) of the side wall (111).

[0069] According to exemplary embodiments, the top surface (112T) of the support (112) may be spaced apart in the Z direction by a distance (D5) from the bottom surface (111BS) of the side wall (111). According to exemplary embodiments, the distance (D5) may be about 1 mm or more. According to exemplary embodiments, the distance (D5) may be about 2 mm or more. According to exemplary embodiments, the distance (D5) may be about 4 mm or more. According to exemplary embodiments, the distance (D5) may be about 5 mm or more. According to exemplary embodiments, the distance (D5) may be about 12 mm or less. According to exemplary embodiments, the distance (D5) may be about 10 mm or less. According to exemplary embodiments, the distance (D5) may be about 8 mm or less. According to exemplary embodiments, the distance (D5) may be about 7 mm or less.

[0070]

[0071] Bridges (113) can connect the side wall (111) and the support (112). One end of each bridge (113) can be connected to the inner surface (111IS1) of the side wall (111). The other end of each bridge (113) can be connected to the support (112). One end of each bridge (113) may be closer to the bottom surface (111BS) of the side wall (111) than the other end of each bridge (113). According to exemplary embodiments, the side wall (111), the support (112), and the bridges (113) may be formed integrally.

[0072] Each of the bridges (113) may include a top surface (113T) facing the receiving space (114) and a bottom surface (113B) facing the discharge space (115). The top surface (113T) and the bottom surface (113B) may be substantially parallel.

[0073] Each bridge (113) may be oblique to the side wall (111). The top surface (113T) of each bridge (113) may be oblique to the inner surface (111IS1) of the side wall (111). The top surface (113T) of each bridge (113) may be oblique to the Y direction. The bottom surface (113B) of each bridge (113) may be oblique to the inner surface (111IS1) of the side wall (111). The bottom surface (113B) of each bridge (113) may be oblique to the Y direction.

[0074] Each bridge (113) may be oblique to the support (112). The top surface (113T) of each bridge (113) may be oblique to the top surface (112T) of the support (112). The top surface (113T) of each bridge (113) may be oblique to the Z direction. The bottom surface (113B) of each bridge (113) may be oblique to the bottom surface (112B) of the support (112). The bottom surface (112B) of each bridge (113) may be oblique to the Z direction.

[0075] According to exemplary embodiments, the top surface (113T) of each bridge (113) may be connected to the top surface (112T) of the support (112). According to exemplary embodiments, the bottom surface (113B) of each bridge (113) may be connected to the bottom surface (111BS) of the side wall (111). However, the position of the bridges (113) is not limited thereto. According to other exemplary embodiments, the bottom surface (113B) of each bridge (113) may not be connected to the bottom surface (111BS) of the side wall (111). That is, the bottom surface (113B) of each bridge (113) may be spaced apart from the bottom surface (111BS) of the side wall (111) in the Z direction.

[0076] The top surface (113T) of each bridge (113) may form a predetermined angle (113A) with respect to the inner surface (111IS1) of the side wall portion (111) defining the receiving space (114). The angle (113A) may be an acute angle. According to exemplary embodiments, the angle (113A) may be greater than about 0°. According to exemplary embodiments, the angle (113A) may be greater than about 10°. According to exemplary embodiments, the angle (113A) may be greater than about 20°. According to exemplary embodiments, the angle (113A) may be greater than about 40°. According to exemplary embodiments, the angle (113A) may be greater than about 60°. According to exemplary embodiments, the angle (113A) may be less than about 90°. According to exemplary embodiments, the angle (113A) may be about 80° or less. According to exemplary embodiments, the angle (113A) may be about 70° or less. According to exemplary embodiments, the angle (113A) may be about 50° or less.

[0077]

[0078] The bridges (113) may be spaced apart from each other. According to exemplary embodiments, the bridges (113) may be spaced apart from each other at equal intervals. According to other exemplary embodiments, the bridges (113) may be spaced apart from each other at different intervals.

[0079] The holder (110) may further include holes (113H) between the bridges (113). According to exemplary embodiments, each hole (113H) may have substantially the same shape. According to other exemplary embodiments, each hole (113H) may have different shapes. According to exemplary embodiments, each hole (113H) may be spaced apart at equal intervals. According to other exemplary embodiments, the holes (113H) may be spaced apart at different intervals.

[0080] The number of bridges (113) may be multiple. The number of holes (113H) may be equal to the number of bridges (113). The number of holes (113H) may be multiple.

[0081] FIG. 5 illustrates an embodiment in which there are four bridges (113), but the number of bridges (113) is not limited thereto. According to exemplary embodiments, the number of bridges (113) may be two or more. According to exemplary embodiments, the number of bridges (113) may be three or more. According to exemplary embodiments, the number of bridges (113) may be five or more. According to exemplary embodiments, the number of bridges (113) may be ten or more. According to exemplary embodiments, the number of bridges (113) may be twenty or fewer. According to exemplary embodiments, the number of bridges (113) may be 18 or fewer. According to exemplary embodiments, the number of bridges (113) may be 15 or fewer. According to exemplary embodiments, the number of bridges (113) may be ten or fewer.

[0082] FIG. 5 illustrates an embodiment in which there are 4 holes (113H), but the number of holes (113H) is not limited thereto. According to exemplary embodiments, the number of holes (113H) may be 2 or more. According to exemplary embodiments, the number of holes (113H) may be 3 or more. According to exemplary embodiments, the number of holes (113H) may be 5 or more. According to exemplary embodiments, the number of holes (113H) may be 10 or more. According to exemplary embodiments, the number of holes (113H) may be 20 or fewer. According to exemplary embodiments, the number of holes (113H) may be 18 or fewer. According to exemplary embodiments, the number of holes (113H) may be 15 or fewer. According to exemplary embodiments, the number of holes (113H) may be 10 or fewer.

[0083]

[0084] The receiving space (114) may be a space for receiving an electrode assembly (30) in the form of a jelly roll. The receiving space (114) may be defined by the inner surfaces (111IS1, 111IS2) of the side wall portion (111), the top surface (112T) of the support (112), and the top surface (113T) of each of the bridges (113).

[0085] The receiving space (114) may have a width (D1) (or diameter). According to exemplary embodiments, the width (D1) of the receiving space (114) may be about 15.0 mm or more. According to exemplary embodiments, the width (D1) of the receiving space (114) may be about 17.0 mm or more. According to exemplary embodiments, the width (D1) of the receiving space (114) may be about 18.0 mm or more. According to exemplary embodiments, the width (D1) of the receiving space (114) may be about 20.0 mm or more. According to exemplary embodiments, the width (D1) of the receiving space (114) may be about 30.0 mm or less. According to exemplary embodiments, the width (D1) of the receiving space (114) may be about 24.0 mm or less. According to exemplary embodiments, the width (D1) of the receiving space (114) may be about 23.0 mm or less. According to exemplary embodiments, the width (D1) of the receiving space (114) may be about 22.0 mm or less.

[0086]

[0087] The discharge space (115) may be separated from the receiving space (114) by the support (112) and the bridges (113). The discharge space (115) may be located at the bottom of the receiving space (114) in the Z direction. The discharge space (115) may be defined by the bottom surface (112B) of the support (112) and the respective bottom surface (113B) of the bridges (113). The discharge space (115) may be surrounded by the side wall (111).

[0088] The discharge space (115) can be in communication with the receiving space (114). The discharge space (115) can be in communication with the receiving space (114) through the holes (112H) of the support (112) and the holes (113H) between the bridges (113). Foreign substances in the receiving space (114) can be discharged into the discharge space (115) through the plurality of holes (112H, 113H). This prevents contamination of the electrode assembly (30) inserted into the receiving space (114).

[0089] In addition, the electrode assembly holder (110) according to exemplary embodiments of the present invention includes a support (112) to support a plurality of segments (12S) at the bottom of the electrode assembly (30) and to maintain the folded state of the plurality of segments (12S). The hole (112H) of the support (112) can prevent excessive pressure from being applied to the plurality of segments (12S) of the electrode assembly (30). Furthermore, since the bridges (113) have a shape that is inclined downward in the Z direction as they approach the side wall (111), the bridges (113) can minimize contact with the plurality of segments (12S) at the bottom of the electrode assembly (30). That is, the bridges (113) can also prevent excessive pressure from being applied to the plurality of segments (12S) of the electrode assembly (30). Thus, the electrode assembly (30) can be loaded and transported to the holder (110) without damage.

[0090]

[0091]

[0092] (2nd Example)

[0093] FIG. 6 is a flowchart illustrating a method for manufacturing a cylindrical battery (200) according to exemplary embodiments. FIG. 7 is a cross-sectional view illustrating a cylindrical battery (200) according to exemplary embodiments.

[0094]

[0095] Referring together to FIGS. 1 to 7, a method for manufacturing a cylindrical battery (200) may include a step (P1) of forming a jelly roll-shaped electrode assembly (30). The jelly roll-shaped electrode assembly (30) may be formed by sequentially winding a first electrode (10), a separator, a second electrode (20), and a separator onto a core. Segments (12S) of the unwound portion (12) of the first electrode (10) may be located at the bottom of the electrode assembly (30), and segments (22S) of the unwound portion (22) of the second electrode (20) may be located at the top of the electrode assembly (30). The segments (12S, 22S) of the unwound portions (12, 22) at both ends of the electrode assembly (30) may be folded toward the winding center of the electrode assembly (30). According to exemplary embodiments, the cylindrical battery (200) may be a tapless type battery.

[0096] A method for manufacturing a cylindrical battery (200) may include the step (P2) of loading an electrode assembly (30) onto an electrode tray (100). The electrode assembly (30) may be loaded onto a holder (110) of the electrode tray (100). The folded segments (12S) of the unoccupied portion (12) located at the bottom of the electrode assembly (30) may be supported by a support (112) of each holder (110).

[0097] A method for manufacturing a cylindrical battery (200) may include the step (P3) of transporting the electrode assembly (30) to a required location and then unloading the electrode assembly (30) from the electrode tray (100). The electrode tray (100) includes a plurality of holes (112H, 113H) so that the electrode assembly (30) can be vertically loaded and transported without damage or contamination to the segments (12S) of the unoccupied portion (12).

[0098] A method for manufacturing a cylindrical battery (200) may include the step (P4) of welding segments (12S, 22S) of the unoccupied portions (12, 22) of the electrode assembly (30) to current collection plates (205A, 205B), respectively. The segments (12S) of the unoccupied portion (12) of the electrode assembly (30) may be welded to the first current collection plate (205A). The segments (22S) of the second unoccupied portion (22) of the electrode assembly (30) may be welded to the second current collection plate (205B).

[0099] A method for manufacturing a cylindrical battery (200) may include the step (P5) of inserting an electrode assembly (30) into a can (201). Subsequently, a first current collector plate (205A) may be welded to the bottom portion (201B) of the can (201). A second current collector plate (205B) may be welded to a top cap (202). The can (201) may serve as a positive terminal connecting the cylindrical battery (200) to the outside. The top cap (202) may serve as a negative terminal connecting the cylindrical battery (200) to the outside.

[0100] The present invention has been described in more detail above through drawings and embodiments. However, the configurations described in the drawings or embodiments described in this specification are merely one embodiment of the present invention and do not represent all technical concepts of the present invention; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

Claims

1. A hollow cylindrical side wall; A support surrounded by the above-mentioned side wall and spaced apart from the above-mentioned side wall; and It includes bridges connecting the above-mentioned side wall and the above-mentioned support, and Each of the above-mentioned bridges is an electrode assembly holder that is oblique to the inner surface of the sidewall portion.

2. In Paragraph 1, An electrode assembly holder characterized in that each of the above-mentioned bridges is inclined with respect to the above-mentioned support.

3. In Paragraph 1, An electrode assembly holder characterized in that the above-mentioned support is perpendicular to the above-mentioned side wall.

4. In Paragraph 1, One end of each of the above bridges is connected to the inner surface of the side wall, and The other end of each of the above bridges is connected to the above support, and An electrode assembly holder characterized in that one end of each of the above-mentioned bridges is closer to the bottom surface of the sidewall than the other end of each of the above-mentioned bridges.

5. In Paragraph 1, An electrode assembly holder characterized in that the bottom surface of the support is located at a different level from the bottom surface of the side wall in the extension direction of the side wall.

6. In Paragraph 1, The electrode assembly holder, characterized in that the above-mentioned support includes a hollow.

7. In Paragraph 1, An electrode assembly holder characterized in that the above-mentioned support is ring-shaped.

8. In Paragraph 1, An electrode assembly holder characterized in that the above bridges are spaced apart from each other.

9. In Paragraph 1, An electrode assembly holder characterized in that the above-mentioned bridges are spaced apart from each other at equal intervals.

10. In Paragraph 1, The above electrode assembly holder is, A receiving space defined by the inner surface of the above-mentioned side wall portion; and An electrode assembly holder characterized by including an exhaust space surrounded by the above-mentioned side wall portions and separated from the receiving space by the above-mentioned support and the above-mentioned bridges.

11. In Paragraph 10, The above electrode assembly holder is, The first hole of the above support; and It further includes second holes between the above bridges, and An electrode assembly holder characterized in that the receiving space is in communication with the discharge space through the first hole and the second hole.

12. In Paragraph 11, An electrode assembly holder characterized in that the number of the second holes is 2 or more and 10 or less.

13. In Paragraph 10, An electrode assembly holder characterized in that each of the above-mentioned bridges forms an acute angle with respect to the inner surface of the sidewall portion defining the receiving space.

14. In Paragraph 10, The above receiving space is configured to accommodate an electrode assembly in the form of a jelly roll, and The above electrode assembly includes segments of unwound portions folded toward the winding center at both ends, and An electrode assembly holder characterized in that the above support supports the segments of the above-mentioned non-removable portion of the electrode assembly.

15. Multiple electrode assembly holders according to claim 1; and An electrode tray comprising a bottom plate that supports the electrode assembly holders from below.

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