Detecting Device of Electrode Assembly And Detecting Method Using The Same

Abstract

The present invention relates to an electrode assembly inspection device and an electrode assembly inspection method using the same. Specifically, the invention relates to an electrode assembly inspection device for inspecting the presence or absence of defects in one or more of an anode, a separator, and a cathode, comprising: a body part including a cuboid-shaped frame part having a rectangular opening (S) provided in the center; a die part made of a transparent material located at the opening (S) to support one or more of an anode, a separator, and a cathode; and an illumination part located below the die part and irradiating light upward. The invention also relates to an electrode assembly inspection device and an electrode assembly inspection method using the same.

Description

Technology Field

[0001] The present invention relates to an electrode assembly inspection device and an electrode assembly inspection method using the same. Specifically, it relates to an electrode assembly inspection device capable of disassembling a secondary battery in a roll state and further diagnosing whether cracks have occurred in the disassembled negative electrode, positive electrode, and separator, and an electrode assembly inspection method using the same. Background Technology

[0003] Recently, the demand for rechargeable batteries capable of storing generated electrical energy is increasing due to air pollution caused by the use of fossil fuels and the development of alternative energy sources resulting from energy depletion. Rechargeable rechargeable batteries are widely used in various fields, including mobile devices, electric vehicles, hybrid electric vehicles, and industrial robots.

[0004] Rechargeable batteries, which serve as an indispensable energy source for various electronic devices in modern society, are seeing increased capacity requirements due to the growing usage and complexity of mobile devices and the development of electric vehicles. While multiple battery cells are arranged in small devices to meet user demand, vehicles utilize battery modules that electrically connect multiple battery cells, or battery packs equipped with multiple such modules.

[0005] Meanwhile, as illustrated in FIG. 1, the electrode assembly of a secondary battery includes a jelly-roll type electrode assembly in which a separator is interposed between a long sheet-type negative electrode and a positive electrode and then wound, a stack type electrode assembly composed of unit cells in which rectangular positive and negative electrodes are stacked with a separator interposed between them, a stack-folding type electrode assembly in which unit cells are wound by a long separator film, or a lamination-stack type electrode assembly in which unit cells are stacked with a separator interposed between them and attached to each other.

[0006] And the cathode has a slurry mixed with a cathode active material and a binder coated on a cathode current collector, and the anode has a slurry mixed with a positive active material and a binder coated on a positive current collector.

[0007] These secondary batteries are inspected for abnormal operation during use or for the occurrence of cracks in the positive electrode, negative electrode, and separator during the manufacturing process for quality control.

[0008] When disassembling a rechargeable battery used in this case, that is, a rechargeable battery in a charged state, it must be performed by a highly skilled worker because there is a high risk of ignition if the positive and negative electrodes come into contact.

[0009] In addition, light is sometimes used to check for cracks on the surfaces of the positive electrode, negative electrode, and separator when the secondary battery is disassembled; however, this exposes workers to dangerous situations, such as positive or negative active materials detaching and getting into the eyes or adhering to the skin.

[0010] However, the development of equipment capable of inspecting for cracks in the anode, cathode, and separator is lagging. Prior art literature

[0012] Korean Registered Patent Publication No. 2133915 (Published July 15, 2020) The problem to be solved

[0013] The present invention aims to solve the above-mentioned problems by providing an electrode assembly inspection device capable of inspecting whether cracks have occurred in the anode, cathode, and separator, and an electrode assembly inspection method using the same.

[0014] In addition, the present invention aims to provide an electrode assembly inspection device and an electrode assembly inspection method using the same, which allows even an unskilled person to easily disassemble a secondary battery in a roll state.

[0015] Furthermore, the present invention aims to provide an electrode assembly inspection device capable of providing a safe working environment when inspecting for the occurrence of cracks in the anode, cathode, and separator, and an electrode assembly inspection method using the same. means of solving the problem

[0017] To achieve the above objectives, the electrode assembly inspection device according to the present invention is an electrode assembly inspection device for inspecting the presence or absence of defects in one or more of an anode, a separator, and a cathode, and is characterized by comprising: a body part (100) including a cuboid-shaped frame part (110) having a rectangular opening (S) provided in the center; a die part (200) made of a transparent material for supporting one or more of an anode, a separator, and a cathode located in the opening (S); and a lighting part (300) located below the die part (200) and irradiating light toward the top.

[0018] In addition, the electrode assembly inspection device according to the present invention is characterized in that a jaw portion (111) is provided on the upper inner edge of the frame portion (110) adjacent to the opening (S) so that the die portion (200) can be seated thereon.

[0019] In addition, in the electrode assembly inspection device according to the present invention, the frame portion (110) is provided with a pair of groove portions (112) positioned facing each other with the opening (S) in between, along the length direction of the frame portion (110), wherein a metal bar (400) is accommodated in the groove portion (112), and further comprises a fixing bar (500) including a magnetic body that is detachable from the metal bar (400).

[0020] In addition, in the electrode assembly inspection device according to the present invention, the fixing bar (500) is characterized by having two or more.

[0021] In addition, in the electrode assembly inspection device according to the present invention, the lighting unit (300) is characterized by including a support plate (310) and one or more lamp units (320) having a bar shape fixed to the support plate (320).

[0022] In addition, in the electrode assembly inspection device according to the present invention, the lighting unit (300) further includes a transfer unit (340) so that the support plate (310) can move along the longitudinal direction of the frame unit (110).

[0023] In addition, in the electrode assembly inspection device according to the present invention, the transfer unit (340) is characterized by including a pair of guide units (341) formed in a closed curve shape, each fixed to both ends of the support plate (310), and a driving means (342) for linearly reciprocating the pair of guide units (341).

[0024] In addition, the electrode assembly inspection device according to the present invention is characterized in that a vertical extension part (120) extending upward is provided at the edge of the frame part (110).

[0025] In addition, the electrode assembly inspection device according to the present invention is characterized in that a shooting unit (600) is provided on the upper part of the body part (100).

[0026] In addition, in the electrode assembly inspection device according to the present invention, the imaging unit (600) is characterized as being a vision camera.

[0027] In addition, the electrode assembly inspection method according to the present invention is an electrode assembly inspection method for inspecting the presence or absence of defects in one or more of an anode, a separator, and a cathode, comprising: a first step of positioning one or more of an anode, a separator, and a cathode in an unfolded state on the upper part of a die made of a transparent material; and a second step of determining whether a crack has occurred by checking whether light irradiated from the lower part of the die leaks out through a part of the surface of one or more of the anode, a separator, and a cathode, wherein the first step further comprises a step of fixing one end of one or more of the anode, a separator, and a cathode using a fixing bar made of a metal bar and a magnetic material housed in the die.

[0028] In addition, in the electrode assembly inspection method according to the present invention, the electrode assembly in the first step is a roll-type electrode assembly in which a first separator, a cathode, a second separator, and an anode are wound, and is characterized by using a fixing bar made of a magnetic material to unfold one or more of the first separator, the cathode, the second separator, and the anode.

[0029] In addition, in the electrode assembly inspection method according to the present invention, the first step is characterized by positioning the first separator, the cathode, the second separator, and the anode on the upper part of the die in an unfolded state.

[0030] In addition, the electrode assembly inspection method according to the present invention is characterized by using a vision camera in the second step to determine whether a crack has occurred. Effects of the invention

[0032] As described above, according to the electrode assembly inspection device and electrode assembly inspection method using the same of the present invention, metal fixing bars are provided on both sides of the die portion where the electrode assembly is seated, and since the electrode assembly is unfolded using a fixing bar containing a magnet, the possibility of contact between the negative electrode and the positive electrode is reduced, thereby minimizing the possibility of fire.

[0033] In addition, according to the electrode assembly inspection device and electrode assembly inspection method using the same of the present invention, an anode, a cathode, and a separator are positioned in an unfolded state on the upper surface of a die made of transparent glass, and a lighting unit is provided below the die, thereby reducing the possibility of scattering of the anode active material or the cathode active material, which can contribute to reducing adverse health effects on workers by improving the working environment.

[0034] In addition, the present invention allows for simultaneous diagnosis of whether cracks have occurred while the anode, cathode, and separator are laid out side by side, thereby making it possible to shorten the time required for inspection. Brief explanation of the drawing

[0036] Figure 1 is a schematic diagram of an electrode assembly housed in a cylindrical can. FIG. 2 is a perspective view of an inspection device according to a first embodiment of the present invention. FIG. 3 is an exploded perspective view of the inspection device illustrated in FIG. 2. Figure 4 is a plan view of the inspection device illustrated in Figure 2. FIG. 5 is a cross-sectional view taken along the line AA´ of the inspection device shown in FIG. 2. FIG. 6 is a cross-sectional view taken along the BB´ line of the inspection device shown in FIG. 2. FIG. 7 is an enlarged perspective view of a lighting unit provided in an inspection device according to a first embodiment of the present invention. FIG. 8 is an enlarged perspective view of a lighting unit provided in an inspection device according to a second embodiment of the present invention. FIG. 9 is a diagram illustrating the process of unfolding an electrode assembly in which a first separator, a cathode, a second separator, and an anode are stacked on an inspection device illustrated in FIG. 2. FIG. 10 is a diagram illustrating the process of arranging the first separator, the cathode, the second separator, and the anode side by side so that they do not overlap. FIG. 11 is a diagram showing a state in which the first separator, the cathode, the second separator, and the anode are arranged so as not to overlap. Specific details for implementing the invention

[0037] Embodiments that enable a person skilled in the art to easily implement the present invention are described in detail below with reference to the attached drawings. However, in describing the operating principles of preferred embodiments of the present invention in detail, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0038] In addition, the same reference numerals are used for parts having similar functions and operations throughout the drawings. Throughout the specification, when a part is described as being connected to another part, this includes not only cases where they are directly connected, but also cases where they are indirectly connected with other elements in between. Furthermore, unless specifically stated otherwise, the inclusion of a certain component does not exclude other components but implies that additional components may be included.

[0040] Hereinafter, an electrode assembly inspection device according to the present invention and an electrode assembly inspection method using the same will be described with reference to the attached drawings.

[0041] FIG. 2 is a perspective view of an inspection device according to a first embodiment of the present invention, and FIG. 3 is an exploded perspective view of the inspection device shown in FIG. 2.

[0042] And FIG. 4 is a plan view of the inspection device shown in FIG. 2, FIG. 5 is a cross-sectional view cut along line AA' of the inspection device shown in FIG. 2, and FIG. 6 is a cross-sectional view cut along line BB' of the inspection device shown in FIG. 2.

[0043] As illustrated in FIGS. 2 to 6, the electrode assembly inspection device according to the present invention comprises a body part (100) forming an overall shape, a die part (200) on which an electrode assembly composed of a first separator, a cathode, a second separator, and an anode is seated, a lighting part (300) that irradiates light toward the die part (200), a metal bar (400) housed in the body part (100), a fixing bar (500) for fixing the electrode assembly, and a shooting part (600) for photographing the appearance of the electrode assembly.

[0044] First, the body part (100) may be configured to include a frame part (110), a vertical extension part (120), and a leg part (130).

[0045] The frame portion (110) has a predetermined length (x-axis direction), a predetermined width (z-axis direction), and a predetermined height (y-axis direction). Its overall shape is a cuboid, and when viewed from above, it is a rectangle, more specifically a rectangular shape, and a rectangular opening (S) is provided in the center.

[0046] And a jaw portion (111) is provided on the upper inner edge of the frame portion (110) adjacent to the opening (S), and the aforementioned die portion (200) is seated on this jaw portion (111).

[0047] Additionally, a pair of grooves (112) are formed along the length direction at a position spaced apart from the jaw portion (111) by a predetermined distance, more specifically between the jaw portion (111) and the edge of the frame portion (110), so that the aforementioned metal bar (400) can be accommodated.

[0048] The vertical extension (120) is extended a predetermined length from the edge of the frame portion (110) toward the top (y-axis direction), which is intended to increase the reliability of the inspection results for the electrode assembly by blocking light from entering through the upper side of the frame portion (110).

[0049] To elaborate, when inspecting whether a crack has occurred in the electrode assembly, the electrode assembly is placed on the upper surface of the die (200), while light irradiated from the lighting unit (300) below the die (200) is directed toward the die (200), that is, upward.

[0050] Therefore, if a crack occurs in the electrode assembly, light is detected through the crack, and if there is no crack, light is not detected. However, since it may be difficult to detect the crack due to the light around the die (200) when the crack is very fine, it is preferable to provide a vertical extension (120) so as to block as much light entering the upper part of the die (200).

[0051] The leg portion (130) is intended to support the frame portion (110) and be spaced apart from the floor by a predetermined distance. One leg portion may be provided at each corner of the frame portion (110), but this can be changed at any time.

[0052] Next, we will describe a die (200) on which an electrode assembly composed of a first separator, a cathode, a second separator, and an anode is seated.

[0053] As described above, a lighting unit (300) is located below the die (200), and since light irradiated from the lighting unit (300) must pass through, it is preferable that the die (200) be made of glass, which is a transparent material, and it is more preferable that it be tempered glass so that scratches can be minimized even if there is friction during the repetitive inspection process.

[0054] Meanwhile, this die (200) is seated and fixed to the jaw portion (111) of the frame portion (110) described above.

[0055] The lighting unit (300) is positioned below the die unit (200) and irradiates light upward. Referring to FIG. 7, which is an enlarged perspective view of the lighting unit provided in the inspection device according to the first embodiment of the present invention, the lighting unit (300) may be configured to include a support plate (310), one or more lamp units (320), and one or more reflective units (330).

[0056] The support plate (310) is approximately rectangular and is configured to fix and support the lamp section (320) and the reflector section (330). One or more lamp sections (320) are approximately bar-shaped and located on the upper surface of the support plate (310), and each lamp section (320) is arranged along the width direction (z-axis direction) of the die section (200), while being spaced apart at a predetermined interval along the length direction (x-axis direction) of the die section (200).

[0057] Here, as long as light can be directed toward the die (200), the type of lamp (320) is not particularly limited and, for example, can be a fluorescent lamp that is generally well known.

[0058] The reflector (330) is intended to guide all light generated from the lamp section (320) to be directed upward, and is shaped to wrap around a lower portion of each lamp section (320), specifically in a semi-cylindrical shape, and is preferably provided with one in each lamp section (320).

[0059] Meanwhile, in FIGS. 5 and 6, the support plate (310) is shown fixed to the leg portion (200), but this is merely an example and it may be fixed to the opening (S) below the die portion (200), that is, the inner surface of the frame portion (110).

[0060] Referring again to FIGS. 2 to 6, the metal bar (400) is positioned in a state of being housed in a pair of grooves (112) provided in the aforementioned frame portion (110).

[0061] To explain in more detail, by being housed in a groove (112) that is recessed between the edge of the jaw portion (111) and the frame portion (110), the movement of the fixing bar (500) containing a magnetic material can be restricted when it is in close proximity or in close contact.

[0062] Through the metal bar (400) and fixing bar (500) as described above, one end of the electrode assembly, in which the first separator, cathode, second separator, and anode are wound, can be fixed and then unfolded, and when checking for cracks, both one end and the other end of the unfolded electrode assembly can be fixed.

[0063] Here, the metal bar (400) is not particularly limited as long as it has a bar shape that can be accommodated in the groove (112), but it is preferable that it has the same external shape as the groove (112), and it is even more preferable that the upper surface of the metal bar (400) and the upper surface of the frame (110) are located on the same plane so that the metal bar (400) does not protrude above the upper surface of the frame (110).

[0064] The fixing bar (500) is made of a magnetic material, i.e., a cuboid-shaped magnet, so as to be easily attached to and detached from the metal bar (400), and may be composed of a first fixing bar (510) and a second fixing bar (520) to fix both ends of the electrode assembly.

[0065] In addition, it is more preferable that the surface in contact with the metal bar (400) be a flat surface, so that it can be securely fixed by maintaining a tight, gap-free contact state with the first separator, cathode, second separator, and anode interposed between the metal bar (400) and the fixing bar (500).

[0066] In addition, the corner portions of the first fixing bar (510) and the second fixing bar (520) are preferably rounded to have a predetermined radius of curvature, so as not to cause damage when in contact with the electrode assembly.

[0067] Meanwhile, the first fixed bar (510) and the second fixed bar (520) may be entirely made of magnets, but considering the cost of purchasing raw materials, it is acceptable for some parts in contact with the metal bar (400) to be made of magnets and the remaining parts to be made of metal, and although the drawing shows two fixed bars, it is acceptable to have three or more.

[0068] The imaging unit (600) is positioned above the frame unit (110) to photograph the condition of the electrode assembly. In detail, it is possible for an operator to visually check whether a crack has occurred in one or more of the first separator, the cathode, the second separator, and the anode constituting the electrode assembly, but it may be difficult to make a judgment if the crack is very fine.

[0069] Therefore, by obtaining an image through a shooting unit (600) such as a vision camera and comparing it with a previously stored normal state image, i.e., a state without cracks, it is possible to accurately determine not only whether a minute crack has occurred but also the location where the crack has occurred.

[0070] FIG. 8 is an enlarged perspective view of a lighting unit provided in an inspection device according to a second embodiment of the present invention.

[0071] Since the inspection device according to the second embodiment of the present invention is identical to the first embodiment described above in its remaining configuration except for the lighting unit, only the lighting unit will be described below.

[0072] The lighting unit according to the second embodiment may be configured to include a support plate (310), one or more lamp units (320), one or more reflective units (330), and a transfer unit (340) for reciprocating the support plate (310) along the length direction of the body unit (100).

[0073] In the first embodiment, the lighting unit simultaneously irradiates light toward all sides of the die (200) and is fixed to the leg (200) or frame (110), whereas in the second embodiment, the configuration is different in that a support plate (310) equipped with a relatively small number of lamp units (320) moves to irradiate light.

[0074] Specifically, both ends of the support plate (310) are fixed to a pair of guide members (341) positioned at a predetermined distance apart in the width direction (z-axis) of the die, while the pair of guide members (341) reciprocate in a straight line in the length direction (x-axis) of the die by means of a driving means (342).

[0075] Here, the guide portion (341) has a closed curve shape with a predetermined width, and a first gear is formed on the inner surface. The driving means (324) may be a rack and pinion gear having a second gear that meshes with the first gear and is provided on a rotation axis, but is not limited thereto.

[0076] According to the second embodiment as described above, a support plate (310) is fixed to the outer surface of a pair of guide portions (341), and since the support plate (310) is structured to move in the longitudinal direction of the die portion (200) by means of a driving means (324), it is very advantageous to selectively inspect a specific part of the electrode assembly by controlling the driving means (324).

[0077] Next, we will explain a method for inspecting an electrode assembly using the aforementioned inspection device.

[0078] FIG. 9 is a drawing for explaining the process of unfolding an electrode assembly in which a first separator, a cathode, a second separator, and an anode are stacked on an inspection device illustrated in FIG. 2, FIG. 10 is a drawing for explaining the process of arranging the first separator, a cathode, a second separator, and an anode side by side so as not to overlap, and FIG. 11 is a drawing showing the state in which the first separator, a cathode, a second separator, and an anode are arranged so as not to overlap.

[0079] The electrode assembly inspection method according to the present invention comprises a first step of placing and unfolding an electrode assembly (B) in which a first separator (B1), a cathode (B2), a second separator (B3), and an anode (B4) are wound on the upper part of a die (200), and a second step of irradiating light from the lower part of the die (200) to determine whether cracks have occurred in the first separator (B1), the cathode (B2), the second separator (B3), and the anode (B4).

[0080] In detail, the first step involves providing an opening (S) in the center, and a die (200) made of transparent glass is positioned in the opening (S), while a metal bar (400) is located near the opening (S), and a lighting unit (300) with a lamp (320) mounted below the die (200) is provided, on which an electrode assembly (B) is placed.

[0081] At this time, one end of the electrode assembly (B), in which the first separator (B1), the cathode (B2), the second separator (B3), and the anode (B4) are wound, is positioned parallel to the metal bar (400), and the first fixing bar (510), made of a magnet, is superimposed on the one end of the electrode assembly (B). At this time, to prevent the first fixing bar (500) from moving, the first fixing bar (500) is positioned in a direction orthogonal to the electrode assembly (B) and the metal bar (400), and is arranged so that a portion of it overlaps with the metal bar (400).

[0082] After that, the second fixing bar (520) is positioned near the first fixing bar (500), and then the second fixing bar (520) is slowly moved along the longitudinal direction (x-axis) of the electrode assembly (B) to fully unfold the electrode assembly (B), and then the second fixing bar (520) is positioned on the other end of the electrode assembly (B).

[0083] Next, the first separator (B1), the cathode (B2), the second separator (B3), and the anode (B4), which are in an overlapping state, are separated and arranged side by side on the die (200).

[0084] The second step is to check whether there is any part where light irradiated from the bottom of the die (200) leaks out onto the surfaces of the first separator (B1), the cathode (B2), the second separator (B3), and the anode (B4).

[0085] At this time, it is also possible to identify whether a crack has occurred by visual inspection by a worker, or to precisely determine whether a crack has occurred, the size of the crack, and the location of the crack by capturing an image with a vision camera on the upper part of the frame (110).

[0086] Meanwhile, although this specification describes a roll-type electrode assembly constituting a cylindrical battery cell as an example, it is obvious that it is also possible to inspect for cracks in stack-type electrode assemblies, etc.

[0088] As specific parts of the present invention have been described in detail above, it is obvious to those skilled in the art that such specific descriptions are merely preferred embodiments and do not limit the scope of the invention, and that various changes and modifications are possible within the scope and spirit of the invention, and that such variations and modifications fall within the scope of the appended claims. Explanation of the symbols

[0090] 100: Body part 110: Frame section 111: Jaw section 112: Groove section 120: Vertical extension 130: Leg section 200: Daibu 300: Lighting section 310: Support plate 320: Ramp part 330: Reflective part 340: Transfer unit 341: Guide section 342: Driving means 400: Metal bar 500: Fixed bar 510: 1st fixed bar 520: 2nd fixed bar 600: Camera Department B: Electrode assembly B1: First separator B2: Cathode B3: Second separator B4: Anode S: Opening

Claims

Claim 1 An electrode assembly inspection device for inspecting defects in one or more of an anode, a separator, and a cathode, comprising: a body part including a cuboid-shaped frame part having a square opening provided in the center; a die part made of a transparent material located in the opening to support one or more of an anode, a separator, and a cathode; and a lighting part located below the die part and irradiating light upward; wherein the frame part is provided with a pair of groove parts positioned facing each other with the opening in between, along the length direction of the frame part, wherein a metal bar is accommodated in the groove part, and further comprising a fixing bar including a magnetic body detachably attached to the metal bar. Claim 2 An electrode assembly inspection device according to claim 1, characterized in that a projection is provided on the upper inner edge of the frame portion adjacent to the opening so that the die portion can be seated thereon. Claim 3 delete Claim 4 An electrode assembly inspection device according to claim 1, characterized in that the fixing bar comprises two or more. Claim 5 An electrode assembly inspection device according to claim 1, wherein the lighting unit comprises a support plate and one or more lamp units having a bar shape fixed to the support plate. Claim 6 An electrode assembly inspection device according to claim 5, wherein the lighting unit further includes a transfer unit so that the support plate can move along the longitudinal direction of the frame unit. Claim 7 An electrode assembly inspection device according to claim 6, characterized in that the transfer unit comprises a pair of guide members formed in a closed curve shape, each fixed to both ends of the support plate, and a driving means for linearly reciprocating the pair of guide members. Claim 8 An electrode assembly inspection device according to claim 1, characterized in that the edge of the frame portion is provided with a vertical extension portion extending upward. Claim 9 An electrode assembly inspection device according to claim 1, characterized in that a shooting unit is provided on the upper part of the body. Claim 10 An electrode assembly inspection device characterized in that, in claim 9, the above-mentioned imaging unit is a vision camera. Claim 11 A method for inspecting an electrode assembly for inspecting for defects in one or more of an anode, a separator, and a cathode, comprising: a first step of positioning one or more of an anode, a separator, and a cathode in an unfolded state on the upper part of a die made of a transparent material; and a second step of determining whether a crack has occurred by checking whether light irradiated from the lower part of the die leaks out through a part of the surface of one or more of the anode, a separator, and a cathode, wherein the first step further comprises a step of fixing one end of one or more of the anode, a separator, and a cathode using a fixing bar made of a metal bar and a magnetic material housed in the die. Claim 12 In claim 11, the electrode assembly in the first step is a roll-type electrode assembly in which a first separator, a cathode, a second separator, and an anode are wound, and the electrode assembly inspection method is characterized by using a fixing bar made of a magnetic material to unfold one or more of the first separator, the cathode, the second separator, and the anode. Claim 13 A method for inspecting an electrode assembly according to claim 12, characterized in that, in the first step, the first separator, the cathode, the second separator, and the anode are positioned on the upper part of the die in an unfolded state. Claim 14 A method for inspecting an electrode assembly according to claim 11, characterized in that, in the second step above, a vision camera is used to determine whether a crack has occurred.

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