Tape forming jig, winding piece taping device comprising same, and winding piece taping method

Abstract

The tape forming jig according to the present invention comprises: a forming plate including a plate body and a forming hole formed through a thickness direction of the plate body and formed to have a diameter decreasing from a first surface of the plate body toward a second surface opposite to the first surface; and a forming block capable of entering the forming hole, and a cross-section of the forming block corresponding to a shape of the forming hole as viewed from an outer side of the second surface of the plate body.

Description

Technical Field

[0001] The present disclosure relates to an apparatus and a method for manufacturing a secondary battery, and more particularly, to a tape forming jig, a winding member taping device, and a winding member taping method, which are applied to a process of taping a cylindrical electrode assembly and an electrode current collector plate with an insulating tape.

[0002] This application is based on and claims priority to Korean Patent Application No. 10-2023-0117910, filed with the Korean Intellectual Property Office on September 5, 2023, the disclosure of which is incorporated herein by reference in its entirety. Background Art

[0003] Secondary batteries that are highly applicable according to product groups and have electrical characteristics such as high energy density are generally applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) driven by power sources.

[0004] Such secondary batteries, as new energy sources that improve eco-friendliness and energy efficiency, are attracting attention because they not only have the main advantage of significantly reducing the use of fossil fuels but also do not produce by-products when using energy.

[0005] Currently widely used secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, etc. The operating voltage of a single secondary battery cell, i.e., a single battery cell, is about 2.5V to 4.5V.

[0006] In addition, secondary batteries can be classified into cylindrical batteries, prismatic batteries, and pouch batteries according to their shape or the type of outer packaging case. Here, in the case of a cylindrical battery cell, a separator as an insulator is interposed between the positive electrode and the negative electrode and is wound to form an electrode assembly in the form of a wound member, and then the electrode assembly is inserted into a battery can to form a battery.

[0007] On the other hand, it has been pointed out that, according to the prior art, small cylindrical battery cells having a form factor of 18650 or 21700 are not suitable for application to electric vehicles because they have a large resistance and generate heat during rapid charging. Therefore, a cylindrical battery cell (so-called tabless cylindrical battery cell) has been proposed, which has a structure in which an uncoated portion of the positive electrode and an uncoated portion of the negative electrode are designed to be located at the top and bottom of a wound member type electrode assembly, respectively, and an electrode current collector plate is welded to the uncoated portion to improve current collection efficiency.

[0008] The positive current collector plate connected to the uncoated portion of the positive electrode can be connected to the positive terminal of the secondary battery, and the negative current collector plate connected to the uncoated portion of the negative electrode can be connected to the negative terminal of the secondary battery. Here, the negative terminal of the secondary battery can be the battery can, and the positive terminal can be the cover plate that seals the opening of the sealed battery can of the sealed body. For example, before accommodating the wound member in the battery can, such a cylindrical battery cell performs a taping process of attaching an insulating tape to the top end of the wound member to which the positive current collector plate is connected, and then ensures insulation between the positive current collector plate and the battery can by accommodating the wound member in the battery can. Here, the taping process can be performed by surrounding the top end of the wound member and the space above the top end with the insulating tape, then folding the end circumferential portion of the insulating tape positioned higher than the top end of the wound member, and attaching the end circumferential portion to the electrode current collector plate at the top end of the wound member.

[0009] However, there is no simple and effective forming jig yet. As a forming jig, it can easily form the end circumferential portion of the insulating tape during the taping process and attach the end circumferential portion to the electrode current collector plate. Summary of the Invention

[0010] Technical Problem

[0011] The present disclosure aims to solve the problems of the related art. Therefore, the present disclosure aims to provide a simple and effective tape forming jig. As a tape forming jig, it can form the end circumferential portion of the insulating tape positioned higher than the top end of the wound member, which is a cylindrical electrode assembly, and attach the insulating tape to the electrode current collector located at the top end of the wound member.

[0012] The present disclosure also aims to provide a wound member taping device and a wound member taping method capable of applying the forming jig.

[0013] However, the technical problems to be solved by the present disclosure are not limited to the above problems, and those skilled in the art can clearly understand other problems not mentioned herein from the following description of the present disclosure.

[0014] Technical Solution

[0015] The tape forming jig for solving the above problems according to the present disclosure is applicable to the process of taping a winding member and an electrode current collector plate provided on the uppermost surface of the winding member when the winding member is erected. The winding member is a cylindrical electrode assembly, and the tape forming jig may include: a forming plate including a plate body and a forming hole formed through the thickness direction of the plate body and configured such that its diameter narrows from the first surface of the plate body toward the second surface opposite to the first surface; and a forming block arranged to be able to enter the forming hole, and its cross-section corresponding to the shape of the forming hole as observed from the outside of the second surface of the plate body.

[0016] The inner peripheral surface of the forming hole may be formed as a rounded curved surface in the thickness direction of the plate body.

[0017] The forming plate may include a first separating pressing portion provided on the second surface of the plate body and protruding from the edge of the forming hole toward the center of the forming hole.

[0018] There may be a plurality of the first separating pressing portions, and the plurality of first separating pressing portions may be arranged at fixed intervals along the circumferential direction of the forming hole.

[0019] The forming block may include a second separating pressing portion arranged to be able to enter the empty space between the plurality of first separating pressing portions.

[0020] The forming hole may include: a first hole section into which the edge of the uppermost surface of the winding member can be fitted; and a second hole section formed with a diameter narrower than that of the first hole section such that the uppermost surface of the winding member cannot enter.

[0021] The forming block may have a thickness at least corresponding to the depth of the second hole section.

[0022] The tape forming jig may further include: a first supporting member that is extensible in length and is arranged such that one end is coupled to the forming plate and the other end is coupled to an external structural member to be able to support the forming plate and position it at a predetermined height; and a second supporting member arranged such that one end is coupled to the forming block and the other end is coupled to an external structural member and is able to support the forming block to position the forming block relatively higher than the forming plate.

[0023] The first supporting member may include: a supporting housing fixedly coupled to the external structural member; a supporting rod movably connected in a translatable manner inside the supporting housing; and a spring member surrounding the outer periphery of the supporting rod outside the supporting housing, wherein one end of the supporting rod may be fixedly coupled to the plate body.

[0024] The second support member can be configured to support the forming block such that the forming block is positioned at a location where the forming block can be inserted into the forming hole when the forming plate ascends.

[0025] According to another aspect of the present disclosure, a winding member taping device can be provided. The winding member taping device includes the above-described tape forming jig, and folds an end circumferential portion of an insulating tape that surrounds a circumferential portion of a winding member where an electrode current collector plate is provided on the uppermost surface of the winding member and a space above the uppermost surface of the winding member, so as to attach the end circumferential portion to the electrode current collector plate. The winding member taping device includes:

[0026] A top frame configured to suspend the tape forming jig at a predetermined height; and

[0027] A winding member lifting unit provided below the tape forming jig and configured to move the winding member in the vertical direction.

[0028] The top frame can be arranged to suspend a plurality of tape forming jigs along the circumferential direction, and the winding member lifting unit can include: a lifting rod vertically located below each of the tape forming jigs in the tape forming jigs, and the lifting rod has a spare tip portion at the top end for pushing the winding member upward toward the forming hole and a roller at the bottom end; and a cylindrical cam unit having a groove on the outer circumferential surface in which the roller is fitted, wherein the groove is curved along the circumferential direction such that the lifting rod moves up and down when rotated.

[0029] The winding member taping device can be configured such that when the cylindrical cam unit rotates once, each of the lifting rods vertically located below each of the tape forming jigs moves up and down once.

[0030] The winding member taping device can further include a reel stand provided below the tape forming jig and configured to support the winding member, wherein the reel stand can include a tip passage hole through which the spare tip portion can pass.

[0031] The spare tip portion of the lifting rod can be configured to vertically pass through the tip passage hole provided in the reel stand to lift the winding member from the reel stand.

[0032] According to still another aspect of the present disclosure, a winding member taping method can be provided. The winding member taping method is used to tape a winding member, which is a cylindrical electrode assembly, and an electrode current collector plate together with an insulating tape by using the above-described tape forming jig.

[0033] The method for taping a wound component may include: a step of attaching an electrode current collector plate to the uppermost surface of the wound component; a step of attaching an insulating tape to the wound component such that the circumferential portion of the wound component and the space above the uppermost surface of the wound component are wrapped by the insulating tape; a primary tape forming step in which the end circumferential portion of the insulating tape is introduced into a forming hole of a forming plate and simultaneously gathered toward the center of the forming hole; and a secondary tape forming step in which a forming block is introduced into the forming hole in a direction opposite to that of the wound component to press the end circumferential portion of the insulating tape gathered in the forming hole and attach the end circumferential portion to the electrode current collector plate.

[0034] Advantageous Effects

[0035] According to one aspect of the present disclosure, a simple and effective tape forming jig can be provided. As a forming jig, it can form the end circumferential portion of an insulating tape positioned higher than the top end of a wound component as a cylindrical electrode assembly, and attach the insulating tape to an electrode current collector located at the top end of the wound component.

[0036] According to another aspect of the present disclosure, a wound component taping device and a wound component taping method to which the forming jig can be applied can be provided.

[0037] The effects obtained through the present disclosure are not limited to the above effects, and those skilled in the art can clearly understand other effects not mentioned herein from the following description of the present disclosure. Description of the Drawings

[0038] Figure 1 A plan view (a) and a side view (b) of a wound component with an insulating tape before forming are schematically shown.

[0039] Figure 2 A plan view (a) and a side view (b) of a wound component with an insulating tape after forming are schematically shown.

[0040] Figure 3 is a perspective view schematically showing the configuration of a tape forming jig according to an embodiment of the present disclosure.

[0041] Figure 4 is a view showing the Figure 3 tape forming jig as viewed from the bottom of the forming plate.

[0042] Figure 5 is Figure 3 a schematic cross-sectional view of the forming hole portion of the forming plate of

[0043] Figure 6 is a perspective view showing the end circumferential portion of a wound component and an insulating tape inserted into the forming hole of a forming plate according to an embodiment of the present disclosure.

[0044] Figures 7 to 9 is a process diagram showing a tape forming process using a tape forming jig according to another embodiment of the present disclosure.

[0045] Figure 10 is a schematic perspective view of a winding member taping device including a tape forming jig according to an embodiment of the present disclosure.

[0046] Figure 11 is Figure 10 side view of.

[0047] Figure 12 is Figure 10 partial enlarged view of.

[0048] Figure 13 is a view of the tape forming jig of Figure 12 viewed from below.

[0049] Figure 14 is a view showing an operation example of a winding member taping device according to an embodiment of the present disclosure. Detailed Description of the Preferred Embodiments

[0050] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms used in the specification and the appended claims should not be construed as limited to the general meaning and dictionary meaning, but should be interpreted based on the meanings and concepts corresponding to the technical aspects of the present disclosure on the basis of the principle that allows the inventor to appropriately define the terms for the best interpretation. Therefore, the description presented herein is merely a preferred example for illustrative purposes and is not intended to limit the scope of the present disclosure. Thus, it should be understood that other equivalent solutions and modifications can be made to the present disclosure without departing from the scope of the present disclosure.

[0051] Throughout the specification, when a part is referred to as "including" a component, unless clearly stated to the contrary, this means that the part may also include other components, rather than excluding other components.

[0052] The tape forming jig described below can be applied to a taping process of pressing an end circumferential portion of an insulating tape wound higher than a winding member as a cylindrical electrode assembly and attaching the end circumferential portion to an electrode current collector plate seated on the uppermost surface of the winding member. The purpose of the taping process here is to ensure insulation between the electrode current collector plate and the battery can by wrapping the top end circumferential portion of the winding member and the electrode current collector plate with an insulating tape before placing the winding member in the battery can.

[0053] At the same time, it should be noted that the scope of the tape forming jig according to the present disclosure should not be misconstrued as being limited to forming an insulating tape targeted at a wound member and an electrode current collector plate. That is to say, the tape forming jig according to the present disclosure can be applied not only to the tape attaching process targeted at a wound member and an electrode current collector plate, but also to forming a tape or a material identical or similar to the tape so as to integrally wrap the circumference of a cylindrical structure and its top surface or bottom surface.

[0054] Figure 1 A plan view (a) and a side view (b) of a wound member with an insulating tape before forming are schematically shown. Figure 2 A plan view (a) and a side view (b) of a wound member with an insulating tape after forming are schematically shown. Figure 3 A perspective view schematically showing the configuration of a tape forming jig according to an embodiment of the present disclosure is shown. Figure 4 It shows a view of the tape forming jig observed from the bottom of the forming plate. Figure 3 and Figure 5 is Figure 3 a schematic cross-sectional view of the forming hole portion of the forming plate.

[0055] First, the form of the insulating tape attached to the wound member to be formed by the tape forming jig according to the present disclosure will be briefly described.

[0056] For example, when a wound member as a cylindrical electrode assembly stands upright, the insulating tape T is attached to the wound member 20 to surround the circumferential portion of the top end of the wound member 20 and the space above the uppermost surface where the electrode current collector plate 30 is located. That is to say, as shown in Figure 1 , the circumferential portion of the top end of the wound member 20 can be wrapped by the portion indicated as "T1" in the insulating tape T, and the space above the uppermost surface of the wound member 20 can be wrapped by the portion indicated as "T2" in the insulating tape T. Here, the portion indicated as "T2" is the portion that needs to be formed, and will be hereinafter referred to as the end circumferential portion T2 of the insulating tape. In this specification, the process of attaching the tape to the wound member can be referred to as the following process: forming the end circumferential portion T2 of the insulating tape wound around the wound member 20 as described above, gathering the end circumferential portion T2 to the center and attaching it to the edge circumferential portion of the electrode current collector plate 30, as shown in Figure 2 .

[0057] The tape forming jig 100 according to the present disclosure allows the work of forming the end circumferential portion T2 of the insulating tape wound around the wound member 20, gathering the end circumferential portion T2 to the center and attaching it to the edge circumferential portion of the electrode current collector plate 30 to be performed very simply and quickly during the process of attaching the tape to the wound member.

[0058] Observing the main configuration of the tape forming jig 100 according to the present disclosure, the tape forming jig 100 includes a forming plate 110 and a forming block 120, as Figure 3 and Figure 4 shown in

[0059] The forming plate 110 is configured to cause the end circumferential portion T2 of the insulating tape wound in a cylindrical manner to converge toward the center, and the forming block 120 is configured to press the converged end circumferential portion T2 of the insulating tape in the center and attach it to the electrode current collector plate 30.

[0060] Specifically, the forming plate 110 may include a plate body 111 and a forming hole 112. The forming hole 112 is formed through the thickness direction of the plate body 111 and is configured such that its diameter narrows from the first surface 111a of the plate body 111 toward the second surface 111b opposite to the first surface 111a.

[0061] In particular, the inner circumferential surface of the forming hole 112 may be formed as a rounded curved surface in the thickness direction of the plate body 111.

[0062] For example, as Figure 4 and Figure 5 shown in, the rounded curved surface according to the present embodiment may include a first curved surface R1, a vertical surface, and a second curved surface R2 along the direction from the first surface 111a to the second surface 111b of the plate body 111.

[0063] In the first curved surface R1, the diameter of the forming hole 112 may be formed to narrow sharply toward Figure 5 the thickness direction (Z direction) of the forming plate 110 in

[0064] and then gradually narrow.

[0065] For example, when the winding member 20 ascends from the lower portion of the forming plate 110, the end circumferential portion T2 of the insulating tape enters the first curved surface R1 section, and when the winding member 20 continues to ascend in this state, the end circumferential portion T2 of the insulating tape may be folded while ascending along the first curved surface R1 and converge toward the center.

[0066] In the second bending surface R2, the diameter of the forming hole 112 may be formed such that it gradually narrows in the thickness direction (Z direction) of the forming plate 110 and then sharply narrows, which is opposite to the change in the diameter of the forming hole 112 in the first bending surface R1. That is, the first bending surface R1 may be arranged such that the center of curvature is located outside the forming hole 112, and the second bending surface R2 may be arranged such that the center of curvature is located inside the forming hole 112.

[0067] According to this second bending surface R2, the end circumference T2 of the insulating tape rising along the vertical surface can be guided along the second bending surface R2 and gathered almost horizontally toward the center.

[0068] Refer again to Figure 5 , the forming hole 112 may include: a first hole section 113 into which the top end boundary of the winding member 20 can be fitted; and a second hole section 114 formed with a diameter narrower than that of the first hole section 113 such that the top end of the winding member 20 cannot enter.

[0069] In this embodiment, the first hole section 113 may be designated as a section of the first bending surface R1, and the second hole section 114 may be designated as a section from the vertical surface to the second bending surface R2. According to the configuration of the forming hole 112 according to this embodiment, the winding member 20 can enter the first hole section 113, and the end circumferential portion of the insulating tape can enter the second hole section 114 and be formed. That is, the end circumferential portion T2 of the insulating tape can enter the second hole section 114 while folding toward the center along the rounded bending surface in the forming hole 112. And, the forming block 120 can enter the forming hole 112 in a direction opposite to the entry direction of the winding member 20 and press the end circumference T2 of the insulating tape gathered toward the center. Here, the forming block 120 has a thickness at least corresponding to the depth of the second hole section 114.

[0070] In this way, since the uppermost surface of the winding member 20 does not enter the forming hole 112, the forming block 120 can press the end circumferential portion of the insulating tape in the forming hole 112. Therefore, the end circumferential portion T2 of the insulating tape can be neatly attached to the electrode current collector plate 30.

[0071] Refer again to Figure 3 and Figure 4 , the forming plate 110 may further include a first partition pressing portion 115 provided on the second surface 111b of the plate body 111 and protruding from the edge of the forming hole 112 toward the center of the forming hole 112.

[0072] The first separated pressing portions 115 according to the present embodiment may be multiple, and the multiple first separated pressing portions 115 may be arranged at fixed intervals along the circumferential direction of the forming hole 112. When observing the forming hole 112 from above, the forming plate 110 has empty spaces between adjacent first separated pressing portions 115.

[0073] According to the forming plate 110 described above, when the winding member 20 rises as shown in Figure 6 , portions K1 corresponding to the lower side portions of the first separated pressing portions 115 in the end circumferential portion T2 of the insulating tape are each blocked by the corresponding first separated pressing portion 115 and horizontally folded toward the center of the forming hole 112, and portions J1 corresponding to the empty spaces between the first separated pressing portions 115 may protrude upward through the corresponding empty spaces. Therefore, the end circumferential portion T2 of the insulating tape can be folded into a regular shape and gathered toward the center of the forming hole 112.

[0074] As a reference, when the end circumferential portion T2 of the insulating tape wound in a cylindrical manner is bent toward the center, some of the bent portions in the bent portion will necessarily overlap each other. However, at this time, when the end circumferential portion T2 of the insulating tape is simultaneously pressed and bent, the end circumferential portion T2 of the insulating tape may be crushed or irregularly folded, which may cause the insulating tape T to be partially lifted or damaged. However, in the case of the present disclosure, as shown in Figure 6 , some of the end circumferential portions in the end circumferential portion T2 of the insulating tape are first pressed by the first separated pressing portions 115, and the remaining portions other than the pressed portions can be folded into the empty spaces between the first separated pressing portions 115 and protrude. In this state, when the end circumferential portion T2 of the insulating tape is pressed by the forming block 120, the problems described above do not occur.

[0075] The forming block 120 may be arranged to be able to enter the forming hole 112, and its cross-section corresponds to the shape of the forming hole 112 observed from the outside of the second surface 111b of the plate body 111.

[0076] In particular, the forming block 120 according to the present embodiment may include a second separated pressing portion 121, and the second separated pressing portion 121 is arranged to be able to enter the empty space between the multiple first separated pressing portions 115 provided on the forming plate 110.

[0077] The second separated pressing portion 121 may be arranged to be able to match the form of the empty space between the first separated pressing portions 115. That is, the second separated pressing portion 121 of the forming block 120 may be arranged in a form that matches the shape of the empty space between the first separated pressing portions 115 of the forming plate 110.

[0078] The forming block 120 can be inserted into the forming hole 112 from the upper part of the forming plate, for example, in a state where the winding member 20 is fitted to the lower part of the forming plate 110 and the end circumferential part T2 of the insulating tape converges toward the center of the forming hole 112, as Figure 6 shown. At this time, the end circumferential part of the insulating tape that converges toward the center of the forming hole 112 can be pressed by the forming block 120 so as to adhere to the electrode current collector plate 30 of the winding member 20. In particular, the end circumferential part J1 of the insulating tape that protrudes upward through the space between the first partition pressing parts 115 can be jointly pressed by the second partition pressing part 121 of the forming block 120, and then the remaining part can be pressed by the forming block 120 so as to regularly adhere to the electrode current collector plate 30.

[0079] As described above, the tape forming jig 100 according to an embodiment of the present disclosure can easily and effectively integrate the top end circumferential part of the winding member 20 with the electrode current collector plate 30 disposed on the uppermost surface of the winding member 20.

[0080] Figures 7 to 9 is a process diagram showing a tape forming process using a tape forming jig 100 according to another embodiment of the present disclosure.

[0081] Next, with reference to Figures 7 to 9 a tape forming jig 100 according to another embodiment of the present disclosure will be briefly described.

[0082] The same reference numerals as those in the above embodiment represent the same components, and the repeated description of the same components will be omitted, and the differences from the above embodiment will be mainly described.

[0083] The tape forming jig 100 according to another embodiment of the present disclosure includes: a first support member 130 that supports the forming plate 110 at a constant height; and a second support member 140 that supports the forming block 120 to position the forming block 120 relatively higher than the forming plate 110.

[0084] The first support member 130 can be arranged such that one end is coupled to the forming plate 110 and the other end is coupled to an external structural member, and the first support member 130 can be arranged to be extendable in length. The second support member 140 can be arranged such that one end is coupled to the forming block 120 and the other end is coupled to an external structural member, and the second support member 140 can be arranged to be extendable in length like the first support member 130.

[0085] Specifically, referring to Figure 7, the first support member 130 includes a support housing 131 fixedly coupled to an external structural member, a support rod 132 connected to move translatably inside the support housing 131, and a spring member 133 surrounding the outer periphery of the support rod 132 outside the support housing 131. Among them, the support rod 132 can be configured such that one end is fixedly coupled to the plate body 111.

[0086] The first support member 130 may include a first_1 support member 130A connected to one edge of the plate body 111 and a first_2 support member 130B connected to the other edge of the plate body 111. Thus, the forming plate 110 can be connected to the first_1 support member 130A and the first_2 support member 130B and positioned at a certain height above the ground in a horizontal state.

[0087] In addition, the second support member 140 can be configured to support the forming block 120 such that the forming block 120 is located at a position where it can be inserted into the forming hole 112 when the forming plate 110 rises.

[0088] Preferably, the second support member 140 may also have substantially the same structure as the first support member 130 and can be configured to include a spring member and be extensible in length. In addition, the second support member 140 may include a second_1 support member 140A and a second_2 support member 140B such that the forming block 120 can be stably held in a horizontal state without tilting left and right.

[0089] According to the second support member 140, when the forming plate 110 rises and the forming block 120 is inserted into the forming hole 112, the forming block 120 can elastically press the end circumferential portion T2 of the insulating tape without tilting left and right.

[0090] Next, with reference to Figures 7 to 9 , the winding member taping method will be briefly described as follows.

[0091] The electrode current collector plate 30 is attached to the uppermost surface of the winding member 20 which is a cylindrical electrode assembly. Here, the electrode current collector plate 30 is in the form of a metal disk and can be coupled to the electrode uncoated portion of the wound electrode plate by welding.

[0092] Next, as Figure 7 shown, the insulating tapes T1, T2 are attached to the winding member 20 such that the circumferential portion of the winding member 20 and the space above the uppermost surface of the winding member 20 are wrapped by the insulating tapes.

[0093] Then, as Figure 8As shown, a primary tape forming process is performed in which the end circumferential portion T2 of the insulating tape is introduced into the forming hole 112 of the forming plate 110 and gathered toward the center of the forming hole 112 simultaneously.

[0094] Then, as Figure 9 shown, a secondary tape forming process is performed in which the forming block 120 is introduced into the forming hole 112 in a direction opposite to that of the winding member 20 to press the end circumferential portion T2 of the insulating tape gathered in the forming hole 112 and attach the end circumferential portion T2 to the electrode current collector plate 30.

[0095] At this time, as Figure 8 shown, when the winding member 20 is pushed upward in a state where the top end edge of the winding member 20 is in contact with the first curved surface R1 of the forming hole 112, the spring member 133 of the first support member 130 is compressed, and thus the support rod 132 and the forming plate 110 rise together. Then, as Figure 9 shown, the end circumferential portion T2 of the insulating tape can be attached to the surface of the electrode current collector plate 30 while being pressed by the forming block 120 entering the forming hole 112.

[0096] In this way, after the tape attaching process for the winding member is performed using the tape forming jig 100 according to the present disclosure, the winding member 20 can be accommodated in a cylindrical battery can made of a metal material. In this case, the electrode current collector plate 30 can be wrapped with the insulating tape T and thus can be insulated from the battery can.

[0097] Figure 10 is a schematic perspective view of a winding member tape attaching device 10 including the tape forming jig 100 according to an embodiment of the present disclosure, Figure 11 is Figure 10 a side view of Figure 12 is Figure 10 a partial enlarged view of Figure 13 is a view of the tape forming jig 100 of Figure 12 viewed from below, and Figure 14 is a view showing an operation example of the winding member tape attaching device 10 according to an embodiment of the present disclosure.

[0098] Next, the winding member tape attaching device 10 including the above tape forming jig 100 will be mainly described with reference to Figures 10 to 14 this.

[0099] The winding member taping device 10 according to the present disclosure may include: a top frame 200 configured to suspend the tape forming fixture 100 at a predetermined height; and a winding member lifting unit 300 disposed below the tape forming fixture 100 and configured to move the winding member 20 in the vertical direction, as Figure 10 and Figure 11 shown therein.

[0100] As Figure 10 shown therein, the top frame 200 may be configured to suspend a plurality of tape forming fixtures 100 along the circumferential direction. Specifically, as Figure 12 and Figure 13 shown therein, one end of the first support member 130 may be fixedly coupled to the forming plate 110, and the other end thereof may be fixedly coupled to the top frame 200. Although schematically shown for convenience of drawing, the coupling between the first support member 130 and the forming plate 110 and / or the top frame 200 may be achieved by a bolt fastening method or a snap fastening method.

[0101] In addition, one end of the second support member 140 may be fixedly coupled to the forming block 120, and the other end thereof may be fixedly coupled to the top frame 200. In this case, the second support member 140 supports the forming block 120 at a position higher than the forming plate 110, at which position the forming block 120 may be inserted into the forming hole 112 of the forming plate 110. The coupling between the second support member 140 and the forming block 120 and / or the top frame may be achieved by a bolt fastening method or a snap fastening method.

[0102] The winding member lifting unit 300 may include: a lifting rod 310 vertically located below each of the tape forming fixtures in the tape forming fixture 100, and the lifting rod 310 has a spare tip 311 at the top end for pushing the winding member 20 upward toward the forming hole 112 and a roller 312 at the bottom end; and a cylindrical cam unit 320 having a groove 321 on the outer peripheral surface in which the roller 312 is fitted, and the groove 321 is curved along the circumferential direction such that the lifting rod 310 moves up and down translationally when rotated.

[0103] Specifically, each lifting rod 310 may be configured such that the roller 312 provided at the bottom end is connected to the groove 321 of the cylindrical cam unit 320 as Figure 11 shown therein, and the spare tip 311 provided at the top end is vertically positioned below the forming hole 112 of the forming plate 110 as Figure 13 shown therein.

[0104] In addition, each lifting rod 310 can be configured not to move in the left, right, front, or rear direction, but to move up and down according to the height change of the groove 321 to which the roller 312 of each lifting rod 310 is connected when the cylindrical cam unit 320 rotates.

[0105] The winding member taping device 10 may further include a reel holder 400 disposed below the tape forming jig 100 and configured to support the winding member 20. The reel holder 400 may include a pin passage hole 401 through which the spare pin portion 311 can pass, as Figure 13 shown.

[0106] Preferably, as Figure 14 shown, the winding member 20 adhered with the insulating tape T can be accommodated in the reel carrier 600 and placed on the reel holder 400. The reel carrier 600 may have a hole at the bottom with a diameter larger than the spare pin portion 311. Therefore, when the lifting rod 310 ascends, the spare pin portion 311 can vertically pass through the pin passage hole 401 of the reel holder 400 and the hole of the reel carrier 600 to lift the winding member 20.

[0107] Meanwhile, the winding member taping device 10 can be configured such that when the cylindrical cam unit 320 rotates once, each of the lifting rods 310 located vertically below each tape forming jig in the tape forming jig 100 moves up and down once.

[0108] For example, when the cylindrical cam unit 320 rotates clockwise from 0 degrees to 180 degrees with the position of each of the lifting rods 310 as the origin, each of the lifting rods 310 can be configured such that the spare pin portion 311 rises from the lowest point to the highest point. And when the cylindrical cam unit 320 rotates from 180 degrees to 360 degrees, each of the lifting rods 310 can be configured such that the spare pin portion 311 descends from the highest point to the lowest point.

[0109] In the winding member taping device 10 according to the present embodiment, including ten tape forming jigs 100 and ten lifting rods 310, the reel holder 400 is disposed between each tape forming jig 100 and each lifting rod 310, and the winding members 20 adhered with the insulating tape T can be seated one by one on each of the reel holders in the reel holder 400. And when the cylindrical cam unit 320 rotates, the ten lifting rods 310 vertically disposed below the ten tape forming jigs 100 can be configured to repeatedly perform the lifting and lowering motion in sequence.

[0110] Therefore, as Figure 14As shown, when the cylindrical cam unit 320 rotates clockwise, each lifting rod 310 rises, and thus each winding member 20 sequentially rises toward each tape forming jig 100, so that the end circumferential portion T2 of the insulating tape can be formed and attached to the electrode current collector plate 30 of each winding member 20, as described above. Thereafter, each lifting rod 310 descends again, and thus each winding member 20 that has completed taping can be seated again on the original reel stand 400. In this way, the winding members 20 that have completed taping can be sequentially discharged to the outside for another process.

[0111] Meanwhile, the winding member taping device 10 may further include, for example, a gear unit 500 that meshes with and rotates a toothed gear of the winding member receiving device or the winding member discharging device at the lowermost end of the winding member taping device 10, so as to be coupled to the winding member receiving device or the winding member discharging device.

[0112] According to the configuration and operating mechanism of the winding member taping device 10 according to the present disclosure, which is configured as the rotary type as described above, the taping operation of a large number of winding members can be performed quickly and reliably, thereby increasing the production yield.

[0113] Although the preferred embodiments of the present disclosure have been shown and described above, the present disclosure is not limited to the above specific preferred embodiments, and it is obvious that those of ordinary skill in the art to which the present disclosure pertains can implement various modifications without departing from the gist of the present disclosure claimed in the claims, and such modifications can be made to the present disclosure within the scope of the claims.

[0114] Meanwhile, the terms indicating directions such as up, down, left, and right used herein are only for convenience of description, and for those skilled in the art, it is obvious that such terms can change according to the position of the observer or the reference object.

Claims

1. A tape forming jig that can be applied to the process of taping a winding member and an electrode current collector plate provided on the uppermost surface of the winding member when the winding member is erected. The winding member is a cylindrical electrode assembly, and the tape forming jig includes: A forming plate, the forming plate includes a plate body and a forming hole, the forming hole is formed through the thickness direction of the plate body and is configured such that its diameter narrows from the first surface of the plate body toward the second surface opposite to the first surface; And A forming block, the forming block is arranged to be able to enter the forming hole, and the cross-section of the forming block corresponds to the shape of the forming hole observed from the outside of the second surface of the plate body.

2. The tape forming jig according to claim 1, Among them, The inner peripheral surface of the forming hole is formed as a rounded curved surface in the thickness direction of the plate body.

3. The tape forming jig according to claim 1, Among them, The forming plate includes a first separating pressing portion provided on the second surface of the plate body and protruding from the edge of the forming hole toward the center of the forming hole.

4. The tape forming jig according to claim 3, Among them, There are a plurality of the first separating pressing portions, and the plurality of the first separating pressing portions are arranged at fixed intervals along the circumferential direction of the forming hole.

5. The tape forming jig according to claim 4, Among them, The forming block includes a second separating pressing portion arranged to be able to enter the empty space between the plurality of the first separating pressing portions.

6. The tape forming jig according to claim 1, Among them, The forming hole includes: A first hole section, the top end edge of the winding member can be fitted into the first hole section; and A second hole section, the second hole section is formed with a diameter narrower than that of the first hole section so that the top end of the winding member cannot enter.

7. The tape forming jig according to claim 6, Among them, The forming block has a thickness at least corresponding to the depth of the second hole section.

8. The tape forming jig according to claim 1, further includes: A first supporting member, the first supporting member can be extended in length, and the first supporting member is arranged such that one end is connected to the forming plate and the other end is connected to an external structural member to be able to support the forming plate and position it at a predetermined height; And A second supporting member, the second supporting member is arranged such that one end is connected to the forming block and the other end is connected to the external structural member, and the second supporting member can support the forming block to position the forming block relatively higher than the forming plate.

9. The tape forming jig according to claim 8, Among them, The first supporting member includes: A supporting shell, the supporting shell is fixedly connected to the external structural member; A supporting rod, the supporting rod is connected inside the supporting shell in a manner that can be translated; and A spring member, the spring member surrounds the outer circumference of the supporting rod outside the supporting shell, Wherein, the supporting rod is configured such that one end is fixedly connected to the plate body.

10. The tape forming jig according to claim 8, Among them, wherein the second support member is configured to support the forming block such that the forming block is positioned at a location where the forming block can be inserted into the forming hole when the forming plate ascends.

11. A winding member taping device, the winding member taping device including the tape forming jig according to any one of claims 1 to 10, and folding an end circumferential portion of an insulating tape - the insulating tape surrounding a circumferential portion of the winding member where an electrode current collector plate is provided on a topmost surface of the winding member and a space above the topmost surface of the winding member - to attach the end circumferential portion to the electrode current collector plate, the winding member taping device including: a top frame configured to suspend the tape forming jig at a predetermined height; and a winding member lifting unit provided below the tape forming jig and configured to move the winding member in a vertical direction.

12. The winding member taping device according to claim 11, Among them, wherein the top frame is arranged to suspend a plurality of the tape forming jigs along a circumferential direction, and the winding member lifting unit includes: a lifting rod vertically located below each of the tape forming jigs in the tape forming jigs, and the lifting rod having a spare tip portion at a top end for pushing the winding member upward toward the forming hole and a roller at a bottom end; and a cylindrical cam unit having a groove on an outer circumferential surface in which the roller is fitted, wherein the groove is curved along the circumferential direction such that the lifting rod moves up and down when rotated.

13. The winding member taping device according to claim 12, Among them, wherein the winding member taping device is configured such that when the cylindrical cam unit rotates once, each of the lifting rods vertically located below each of the tape forming jigs in the tape forming jigs moves up and down once.

14. The winding member taping device according to claim 12, further including: a reel stand provided below the tape forming jig and configured to support the winding member, wherein the reel stand includes a tip passage hole through which the spare tip portion of the lifting rod can pass, and the spare tip portion of the lifting rod is configured to vertically pass through the tip passage hole provided in the reel stand to lift the winding member from the reel stand.

15. A winding member taping method, the winding member taping method using the tape forming jig according to any one of claims 1 to 10 to tape a winding member and an electrode current collector plate together with an insulating tape, the winding member being a cylindrical electrode assembly, the winding member taping method including: a step of attaching the electrode current collector plate to a topmost surface of the winding member; a step of attaching the insulating tape to the winding member such that a circumferential portion of the winding member and a space above the topmost surface of the winding member are wrapped by the insulating tape; A primary tape forming step, in which an end circumferential portion of the insulating tape is introduced into a forming hole of the forming plate and simultaneously gathered toward the center of the forming hole; and A secondary tape forming step, in which the forming block is introduced into the forming hole in a direction opposite to that of the winding member to press the end circumferential portion of the insulating tape gathered in the forming hole and attach the end circumferential portion to the electrode current collector plate.

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