Tablet energy storage device and method for manufacturing the same

Abstract

The present invention provides a method for manufacturing an energy storage device such as a lithium-ion battery without tabs for connecting electrode jelly rolls to a can, and a flagged electrode. [Solution] A method for manufacturing a tablet energy storage device is provided, comprising the steps of: providing an electrode layer in which an active material is arranged across a foil; forming a series of flags on the foil to form a flagged electrode; winding the flagged electrode to form an electrode roll comprising a series of wound flags; and electrically connecting the wound flags to a current collector to form an energy storage device.

Description

Technical Field

[0001] [Cross - Reference to Related Applications] Any application in which a foreign or domestic priority claim is identified in the application data sheet or petition filed together with this application is incorporated herein by reference under 37 CFR 1.57 and under Rules 4.18 and 20.6, such as U.S. Provisional Application No. 63 / 081,244, filed on September 2, 2020, and U.S. Provisional Application No. 63 / 167,565, filed on March 29, 2021.

[0002] The present disclosure relates to an energy storage device and a method for manufacturing the same. More specifically, the present disclosure relates to a battery cell having a tabless cathode and anode and a method for manufacturing the battery cell.

Background Art

[0003] Currently, many types of battery cells are used as an energy source in electric vehicles and energy storage applications. Many current cells use a jelly - roll configuration in which the cathode, anode, and separator are wound together and have cathode tabs and anode tabs for connection to the plus and minus terminals of the cell can.

[0004] The current path necessarily proceeds through these tabs to connectors outside the battery cell. However, when the current has to move out of the cell to the tab across the entire cathode or anode, the ohmic resistance increases with distance. Further, since the tabs are additional components, they add additional thickness to the device and themselves have to be wound into the jelly - roll, increasing costs and presenting manufacturing challenges.

Summary of the Invention

[0005] For the purpose of summarizing the advantages achieved beyond the present invention and the prior art, specific objectives of the present invention and The advantages and benefits described herein are not applicable to any specific purpose or benefit of the present invention. This cannot be achieved in the embodiments. Therefore, for example, a person skilled in the art would understand Thus, the present invention does not necessarily have any other purposes or advantages that may be taught or suggested herein. Without achieving any one or more advantages as taught herein, It can be implemented or adapted to suit the needs of the situation.

[0006] One embodiment has a series of flags formed from the foil portions at the upper and lower ends of each electrode. A method for creating a battery cell having a casing or cathode, wherein the flag is folded at each end. This method involves forming the shape of flowers by kneading and arranging them alternately.

[0007] In other embodiments, a method for creating a tablet energy storage device is described. The method is active The steps include providing an electrode layer in which a material is arranged across a foil, and forming a series of flags on the foil. The steps include forming an electrode with a flag and an electrode roll having a series of wound flags. The steps involve winding a flagged electrode to form a current collector. The process includes the step of electrically connecting to form an energy storage device.

[0008] In other embodiments, a method for creating a wound electrode is described. The method involves arranging the electrodes across a foil. The steps include providing an electrode layer containing an active material and forming a series of flags on a foil. The steps involve forming an electrode with a flag and forming an electrode roll with a series of wound flags. a step of winding a flagged electrode, and bending the winding flag to form a bent winding flag, where each flag of the bent flag is substantially arranged alternately a step of forming a stepped bent flag, where each flag of the bent flag is substantially arranged alternately and includes a step of being directed into a substantially alternately arranged form

[0009] In another aspect, a method of creating a wound electrode is described. The method includes providing an electrode layer comprising an active material disposed across a foil, forming a series of flags on the foil to form a flagged electrode, bending the flags to produce a flagged electrode with a series of bent flags, and winding the flagged electrode with bent flags to form an electrode roll, where each flag of the bent flags is substantially arranged alternately when the bent flags are wound and includes a step of providing an electrode layer comprising an active material disposed across a foil, forming a series of flags on the foil to form a flagged electrode, bending the flags to produce a flagged electrode with a series of bent flags, and winding the flagged electrode with bent flags to form an electrode roll, where each flag of the bent flags is substantially arranged alternately when the bent flags are wound and includes a step of bending the flags to produce a flagged electrode with a series of bent flags, and winding the flagged electrode with bent flags to form an electrode roll, where each flag of the bent flags is substantially arranged alternately when the bent flags are wound and includes a step of winding the flagged electrode with bent flags to form an electrode roll, where each flag of the bent flags is substantially arranged alternately when the bent flags are wound and includes a step of winding the flagged electrode with bent flags to form an electrode roll, where each flag of the bent flags is substantially arranged alternately when the bent flags are wound and includes a step of being directed into a substantially alternately arranged form when the bent flags are wound

[0010] In another aspect, a flagged electrode with alternately arranged flags is described. The electrode comprises a wound flagged electrode layer comprising an active material disposed across a foil, the foil comprising a series of flags, each of the series of flags being bent to form a substantially alternately arranged form and includes a wound flagged electrode layer comprising an active material disposed across a foil, the foil comprising a series of flags, each of the series of flags being bent to form a substantially alternately arranged form and includes a wound flagged electrode layer comprising an active material disposed across a foil, the foil comprising a series of flags, each of the series of flags being bent to form a substantially alternately arranged form and includes a wound flagged electrode layer comprising an active material disposed across a foil, the foil comprising a series of flags, each of the series of flags being bent to form a substantially alternately arranged form

[0011] All of these embodiments are intended to be within the scope of the invention disclosed herein These and other embodiments of the invention will become readily apparent to those skilled in the art from the following detailed description of the preferred embodiments with reference to the accompanying drawings, and the invention is not limited to any particular preferred embodiment disclosed and the invention is not limited to any particular preferred embodiment disclosed

Brief Description of the Drawings

[0012] [Figure 1A] A perspective view of a battery cell can is shown​

[0013] [Figure 1B] Shows a side view of a battery cell can.

[0014] [Figure 2] Shows a perspective view of the material layer within a battery electrode of one embodiment of the present invention during the flag folding process.

[0015] [Figure 3A] Shows an image of a battery electrode with folded and alternately arranged flag features.

[0016] [Figure 3B] Shows a CT image of a cross-section of the battery electrode of FIG. 3A, showing the upper alternately arranged and folded flags.

[0017] [Figure 3C] Shows a segmented image of the structure of a battery electrode with alternately arranged flag features. The left segmented image is a structural model of a flower design obtained by forming a jelly roll using alternately arranged flags, and the right segmented image is a density map model of the flags of the jelly roll.

[0018] [Figure 3D] Is a schematic diagram showing the possible angles of the electrode flags.

[0019] [Figure 4] Is a schematic cross-sectional view of a jelly roll of one embodiment of a cathode and anode having folded flags.

[0020] [Figure 5A] Shows embodiments of upper and lower current collectors having cutouts.

[0021] [Figure 5B] Is an image of an upper current collector showing a laser weld on the cutout.

[0022] [Figure 5C] A series of images of a jelly roll with upper and lower current collectors, along with laser welds of different patterns.

[0023] [Figure 6A] This shows an electrode roll having a cap or upper end used to compress the flags at the ends of the roll and fold them into alternating positions.

[0024] [Figure 6B] Figure 6A shows an upper-edge image that can be used to compress the flag.

[0025] [Figure 7A] This is a perspective view of a directional air ring and press for arranging electrode flags alternately.

[0026] [Figure 7B] Figure 7A is a cross-sectional cutaway view of the directional air ring, showing the internal air channel and outlet.

[0027] [Figure 8] A perspective view of a set of diverters and rollers for bending electrode foil flags before winding is shown.

[0028] [Figure 9] A perspective view of the roller and wedge configuration for bending the electrode foil flag before winding is shown.

[0029] [Figure 10] A perspective view of the press roller and anvil configuration for bending the electrode foil flag before winding is shown.

[0030] [Figure 11A] This diagram illustrates the problem of flags interfering with each other when electrodes are wound around a roll.

[0031] [Figure 11B] This figure shows a flag management system used to move or position flags in an alternating arrangement relative to each other, such that the trailing edge of one flag is below the leading edge of an adjacent flag when the roll is being wound.

[0032] [Figure 12] This is a schematic diagram of an inspection device that may be used to inspect electrode rolls.

[0033] [Figure 13A] This is a set of images illustrating the process of inspecting flag formation in wound electrode rolls.

[0034] [Figure 13B] This is an image of an electrode roll that was incorrectly formed during testing. [Figure 13C] This is an image of an electrode roll that was incorrectly formed during testing. [Figure 13D] This is an image of an electrode roll that was incorrectly formed during testing. [Modes for carrying out the invention]

[0035] This disclosure relates to an energy storage device cell, and the process from the anode conductor and cathode conductor to the can. Those who create cells for energy storage devices such as lithium-ion batteries with breath connections. Regarding the law. For example, in a jelly roll cell configuration, the negative electrode and the positive electrode are, They are formed to include a flag structure at their edges in order to make an electrical connection to the battery can. As each flagged electrode is wound within the jelly roll, the flags are pushed inward. They are embedded and arranged alternately at each end of the jelly roll in the shape of a "flower" or "artichoke". It can form a shape like this. The folded flag is at the top and bottom of the end of the battery cell. The current collector is joined (e.g., by pressing, soldering, laser welding, etc.) to form a cylinder. A cylindrical unit can be formed. The cylindrical unit then contains a lithium-ion battery. It may be loaded into a battery case for final processing to form.

[0036] Each electrode may have tens or hundreds of flags, and the flags may take any form. It is possible. For example, a flag can form a flower shape when rolled up inside a jelly roll. They may be spaced very close to each other. In other embodiments, each flag may be Align the flags to form a single line of flags on one side of the jelly roll. The flags can be separated. In one embodiment, the flags are jelly rolls. They are spaced apart so as to be arranged alternately when they are formed. In one embodiment, they are arranged alternately The flag can be compressed into a flat or substantially flat form at each end of the cell.

[0037] In one embodiment, each end of the cell is capped with a current collector. The current collector is It may be a true circular metal structure. In other embodiments, the axis is derived from the components within the jelly roll. Notches may be formed that act to release directional or torsional stresses. This gives the current collector a greater ability to bend due to the stress applied to the battery cell. Therefore, a set of triangles, circles, squares, rectangles, or other geometric shapes is placed on the current collector. It can be cut out.

[0038] Here, the example will be referred to in detail to the specific aspects or features shown in the attached drawings. Therefore, to refer to the same or corresponding part, the corresponding or similar reference number is used throughout the drawing. It is used.

[0039] Figure 1 shows the battery cell 100 in a perspective view of Figure 1A and a side view of Figure 1B. Referring also to B, the battery cell 100 is the chemical energy of the substance stored in the battery cell 100. Any type of conventional battery cell capable of converting energy into electrical energy Alternatively, the battery cell 100 has a first end 102 and a second end 104. 100 has a positive terminal 106 and a negative terminal 108 toward the first end 102. The positive terminal 106 is connected to the battery cell 100 to allow contact with the positive terminal 106. It preferentially protrudes from the first end 102, and distinguishes the first end 102 from the second end 104, Different shapes of the positive terminal 106 may exist. The negative terminal 108 is the second end 1 It preferentially starts at 04, continues on the outer surface 110 of the battery cell 100, and part of the first end 102. At least cover the battery cell 100. The portion covering the battery cell 100 from the outer surface to the first end is the battery cell 10 It is sometimes called the "shoulder portion" of 0. The negative terminal 108 is preferably formed on the shoulder portion. As a result, the connection to the negative terminal can be made at the shoulder. 108 is preferentially located on the shoulder of battery cell 100. Positive terminal 106 and negative terminal To prevent 108 from coming into contact with each other and short-circuiting, an insulating region 1 is provided on the surface 110 of the battery cell 100. 12 may be provided. The insulating region 112 is connected to the positive terminal 106 via any other means. It may be provided in the area of ​​the surface 110 between the negative terminal 108. In an alternative embodiment... It can switch between positive and negative terminals.

[0040] As shown in Figure 2, the jelly roll 200 includes a first substrate 202, and this first A first coating 210 is placed on the side surface of the substrate 202. In some embodiments, The first coating 210 is applied to both sides of the first substrate 202 to form a double-layer electrode. They may be arranged as follows. In some embodiments, the first substrate 202 is preferably, for example For example, a laminate having a predetermined thickness in the range of 0.01 to 1 millimeter (mm) This is embodied in form. In some embodiments, the first substrate 202 comprises a current collector. In some embodiments, the current collector comprises metal foil. In some embodiments, the current The collector is made of aluminum or copper.

[0041] In some embodiments, the first coating 210 has a first amount of conductivity. A conductive coating may also be used. In some embodiments, the first coating 210 The electrode film may also be used. In some embodiments, a conductive coating is used to protect the electrode active material. Includes. In some embodiments, the electrode active material is the cathode active material. In this state, the electrode active material is an anode active material. In some embodiments, the electrode active The materials include silicon materials, graphite materials, graphite, graphene-containing materials, and hard carbon. Soft carbon, carbon nanotubes, porous carbon, conductive carbon, lithium Cobalt-manganese oxide (NMC), lithium manganese oxide (LMO), phosphoric acid Lithium iron (LFP), lithium cobalt oxide (LCO), lithium titanate (LTO) ), lithium nickel cobalt aluminum oxide (NCA), layered transition metal oxides (examples) For example, LiCoO2 (LCO), Li(NiMnCo)O2 (NMC), and / or LiNi 0.8 Co 0.15 Al 0.05O2(NCA)), spinel manganese oxide (LiMn2O4(LMO) ) and / or LiMn 1.5 Ni 0.5 O4 (LMNO), etc., olivine (e.g., LiFe PO4), chalcogenide (LiTiS2), tavolite (LiFeSO4F), silicon, Silicon dioxide (SiOx), aluminum, tin, tin oxide (SnOx), manganese oxide ( MnOx), molybdenum oxide (MoO2), molybdenum disulfide (MoS2), nickel oxide (NiOx), copper oxide (CuOx), and lithium sulfide (Li2S), and combinations thereof Selected from a group consisting of a combination.

[0042] In some embodiments, the first coating further includes a binder. In this case, the first coating 210 is applied by any means known to those skilled in the art. The first coating 210 may be placed on the substrate 202. Some examples of deposition include mechanical deposition, electromechanical deposition, electrochemical deposition, or deposition known to those skilled in the art. This includes, but is not limited to, any combination of the processes.

[0043] In addition to this, or optionally, the first substrate 202 is positioned midway along the width W of the first substrate 202. A foil portion 212 is formed on the substrate 202 of 1, which includes a series of lower flags 218. As shown, a jelly roll is then formed, and the lower flag 218 is on the central axis AA'. It is wrapped around the first base material 20. In some embodiments, the lower flag 218 is the first base material 20 2 is an exposed region (e.g., current collector). In some embodiments, conductive portion 2 18 consists of or essentially consists of the first substrate 202.

[0044] An inner separator 204 is placed over the first substrate 102 (for example, the first substrate (Stacked on material 102). In some embodiments, the inner separator 204 is For example, having a predetermined thickness within the range of 0.01 to 0.05 millimeters (mm). It forms a laminated structure. In some embodiments, the inner separator is 10 μm, 15 μm m, 20 μm, 30 μm, 40 μm, or 50 μm, or any range of values ​​in between. (For example, 10-15 μm), or an approximate value. Furthermore, several In some embodiments, the inner separator 204 is electrically insulating. In some embodiments, The inner separator may contain a polymer material. In some embodiments, the inner separator The material may be selected from polyethylene, polypropylene, or a combination thereof. In some embodiments, the inner separator comprises multiple separator layers. In terms of form, the inner separator has micropores.

[0045] Furthermore, the second substrate 206 is placed across the inner separator 204 (for example, inner (Stacked on side separator 204). The second substrate 206 is on the side of the second substrate 206. It has a second coating 220 which is positioned there. In some embodiments, the second coating The coating 220 may be arranged on both sides of the second substrate 206. In some embodiments In this case, the second base material 206 is a predetermined material within the range of, for example, 0.01 to 1 millimeter (mm). It takes the form of a laminate having a thickness of the size of the second substrate 206 It includes a current collector (for example, foil).

[0046] The second coating 220 is a conductive coating having a second amount of conductivity. In some embodiments, the second coating 220 may be an electrode film. In the application form, the conductive coating contains an electrode active material. In some embodiments, the electrode active The active material is a cathode-active material. In some embodiments, the electrode-active material is an anode-active material. It is a material. In certain embodiments, the second coating 220 is the first coating It may be the same as or identical to G210, and therefore may have the same or identical conductivity. i. In certain other embodiments, the second coating 220 is the first coating 2 It may be different from 10, and therefore may have different conductivity. Several implementations In this state, the second coating 220 is applied by any means known to those skilled in the art. The second coating 220 may be placed on the second substrate 206. Some examples of placement include mechanical deposition, electromechanical deposition, electrochemical deposition, or to those skilled in the art. This includes, but is not limited to, any combination of known processes.

[0047] The outer separator 208 may be arranged across the second substrate 206 (for example, (Stacked on the second substrate 206). In some embodiments, the outer separator 2 08 is a thickness of a predetermined size, for example, within the range of 0.01 to 0.05 millimeters (mm). It has the form of a laminate having the following characteristics. Furthermore, the outer separator 208 is electrically insulating. The first base material 202, the inner separator 204, the second base material 206, and the outer separator 208 When sequentially stacking, the first base material 202, the inner separator 204, the second base material 206 and The outer separator 208 brings the first substrate 202 closest to the central axis AA'. It is wound around the central axis AA'.

[0048] As shown in the figure, the second base material 206 is formed from a foil that communicates with the second base material 206. Includes a string of flags 206A. These flags 206A are formed by jelly rolls. When it is bent toward the central axis AA', it wraps around the upper layer of the jelly roll. It rotates to form a flower or artichoke shape.

[0049] Figure 3A shows an anode with an upper flag that is folded to form the structure of a flower. This is a photograph showing one embodiment. Figure 3B is a CT scan of a cross-section of the apparatus in Figure 3A. The bent flags are electrically connected to each other, but the cathode material shown at the bottom of Figure 3B This indicates that it is not connected to any of the parts.

[0050] Figure 3C shows segmented images of the battery electrode structure with flag features, and the segmented image on the left shows the flag feature. A structural model of a floral design obtained by forming a jelly roll using a rag. The image on the right is a density map model of the jelly roll flag. As shown above, in this embodiment, the shape of the flag is relatively square. Naturally, To form a flag structure from a casing or cathode, rectangular, triangular, or trapezoidal shaped flags are used. It should be understood that any related geometric shapes, such as bags, can be used in a similar manner. .

[0051] Figure 3D shows that the flag can be angled in one direction. In one embodiment... The flag is tilted toward the direction of the jelly roll. In other embodiments, The flag is tilted away from the direction of the jelly roll. In this embodiment, for example, approximately 10 degrees, 10.5 degrees, 11 degrees, 11.5 degrees, 12 degrees, 12.5 degrees , including 13 degrees, 13.5 degrees, 14 degrees, 14.5 degrees, or 15 degrees, 5 degrees to 10 degrees, 11 0 to 3 degrees, including degrees 0 to 20 degrees, 21 to 30 degrees, 10 to 15 degrees, or any number in between. They may be angled to more than 0 degrees. Each flag has a height of 1-10 mm and a width of 1- It can also be 10mm. For example, a flag can be 3-6mm in height and 3-6mm in width. That's fine.

[0052] Figure 4 is a side cross-sectional view of one embodiment of the jelly roll. This embodiment is a copper flag 40 Includes anode 405 connected to 8. Insulators 410A and 410B have adjacent anode materials. This prevents contact with cathode 415. Cathode 418 is made of aluminum. It is electrically connected to the 418. As can be seen by examining Figure 4, the jelly roll Each anode section inside is connected to the upper copper flag, and each cathode in the jelly roll The section connects to the lower aluminum flag.

[0053] Figure 5A shows an aluminum current collector 5 connected from the cathode to the aluminum flag. It indicates 00. As can be assumed when examining Figure 3A, the current collectors are arranged alternately. It is positioned at the upper end of the flower structure formed by the flag. Its current collector is located at the flag. It compresses and makes electrical connections across the entire large surface area of ​​the floral structure formed from the flag. This can be done. As shown in the figure, each current collector 500 is an arbitrary number of electrodes inside the cylinder. A series of notched sections 510A, 510 act to release strain from buttock motion. Includes B. Also, Figure 5A shows copper having notches 530A and 530B that connect to the anode. The current collector 525 is also shown.

[0054] Figures 5B and 5C show the upper and lower ends of each cylindrical unit, from the upper end where the current collector is welded. This shows a copper and aluminum current collector laser-welded to a flag formed at the end. Although the laser-welded area is shown as a circle in the diagram, it is important to understand that it is not limited to that specific shape. It should be understood that laser welding of lines, curves, circles, and other geometric shapes is all within the scope of this invention. It can be considered within. In some embodiments, the flag is used in pressure welding, solder joints, welding (e.g.) For example, laser welding, and combinations thereof, can be used to connect to the current collector. Cut. Manufacturing method

[0055] Tablet energy storage devices are manufactured using high-speed and / or high-volume processes suitable for commercial production. It can be manufactured. An embodiment of the method for forming the device is a lithium-ion current collector and This may include starting with an electrode comprising a foil portion located at the end of the electrode's width.

[0056] When electrodes are provided, a series of flags are formed from the foil portion of each electrode, resulting in a flagged product. An electrode is generated. In some embodiments, the flag is a positive electrode and It is produced by forming a slit in the foil portion of the negative electrode. Several implementations In this state, the slits are formed by cutting or laser etching the foil. In some embodiments, a series of flags are arranged so that when the electrodes are wound, the flags form a "flower" or It is formed in a pattern that is configured to form an "artichoke" shape. The flags may be arranged alternately, in which case the trailing edge of one flag may be adjacent to the flag of the adjacent flag. It can be folded under the leading edge of the rug.

[0057] A flagged electrode is formed to create an electrode roll with a series of winding flags. It is wound into a "jelly roll". In some embodiments, a series of flags are wound up This is done so that each flag does not substantially overlap with other flags on the electrode roll. It is qualitatively linear (i.e., not bendable). In some embodiments, it is coiled. The series of flags are bent inwards towards the inside of the electrode roll.

[0058] To form the "flower" or "artichoke" shape of the electrode roll flag The flag is bent toward the center line (i.e., the central axis) of the electrode roll. In one embodiment, a series of flags are folded after being wound. In some embodiments, The jelly roll is first wound up, and then, after winding, the flag is placed along the center line of the jelly roll. It is folded toward. In some embodiments, the flag is the outer part of the flag The flag is folded sequentially or continuously from the center outwards. Several implementations In form, a series of folds are performed on each or a group of flags. In one embodiment, the continuous bending is such that the roller first presses the outermost flag. Press down, then move continuously inward, alternating the placement of each circumferential flag set beneath each other. This is done by the rollers as the jelly roll rotates.

[0059] In some embodiments, the folding of the flag after winding is performed on all or substantially of the flag. It is performed simultaneously on all of them. For example, as shown in Figure 6A, press or ca Place the top (Figure 6B) over the top of the set of flags at each end of the jelly roll. Then, the flag can be bent toward the center line of the jelly roll. Several implementations In some embodiments, simultaneous bending is performed by pressing. The type of press is selected from flat presses, dome presses, and combinations thereof. In this embodiment, to form the structure shown in Figures 3A to 3C, a jelly roll or a can Rotate the buckle or press to fold the flag towards the center line, press down, and cross Helps them to be positioned relative to each other.

[0060] In some embodiments, the directional air ring or "Blow-Ring" shown in Figures 7A and 7B is used. The "ring" is equipped with a ring-shaped device that can accommodate the end of the jelly roll. The hole in the central circumference releases compressed air at a certain angle to form an air vortex at the center of the ring. Positioned or configured to exert force. Use the air vortex to push down the flag and jet. They can be arranged alternately towards the final position of the ends of the reel roll. As shown in Figure 7A, After the flags are placed alternately in their appropriate positions, the stalk and the round base are placed Using the squeegee, bend the flags and position them in their final positions in the floral arrangement. It can be pressed down. In some embodiments, pressing and directing air ring simultaneously It can be used to fold and / or arrange the flags substantially alternately.

[0061] As can be assumed from examining Figures 7A and 7B, a jelly roll with a flag The end is inserted into the center of the directional air ring, and compressed air passes through the central hole at a certain angle. It is pushed forward. The air forms a swirling vortex, which uses air pressure to propel each flag in place. By gently pressing the flags into place, tilt them, and arrange them alternately to form the final flower shape. Helps to push. In some embodiments, a directional air ring is used for the fluidized bed for the flag. The directional air ring is configured to generate a central hole or that generates a pressurized vortex of air. It should be understood that the embodiments are not limited to those having an orifice. The central portion may include a slit, channel, or other outlet for pressurized air. This is useful for pressurizing the flags to alternately position them in their final form within the jelly roll. It forms an air space.

[0062] In some embodiments, the electrode flags are placed inline before winding the jelly roll. Then fold it in advance (i.e., wind it in advance). As shown in Figure 8, several implementations In this state, inline folding causes the flag to be bent in one direction as it approaches the roller. This is performed by a deflector that bends in the direction. The roller is directed so that the flag is relative to the foil portion of the electrode. The bending is completed so that there is a permanent crease, bend, or curve in the flag. Yes, it is possible. In the embodiment shown in Figure 9, the flag moves across the roller, and then The flag is then bent by contacting a wedge that pushes it upward to a bent position relative to the foil electrode. It is bent. In some embodiments, inline bending using a deflector is bent. Matching the deflector to the narrow channel through which the flag passes in order to form the curve. This includes the reverse side as well. Of course, there are countless ways to fold a flag, and these are jelly rolls. These are just a few examples of how the flag can be folded before its formation. (See Figure 10) In another example, the press roller is positioned adjacent to the anvil roller, and the foil with the flag is located. It extends between the flags. The press roller moves as the flag passes through the roller set. Bend the rag against the anvil roller. Two or more rollers, scoring spool, It should be understood that other embodiments, including combinations thereof, are also intended.

[0063] In some embodiments, the bending roller is a pinch roller, a press roller, or so These are combinations. In some embodiments, the roller has a flag on the edge of the roller. It is configured to allow the electrode to protrude above the section. In some embodiments, the electrode The flags are folded inline to obtain their final alternating flower shape. It is bent, and then bent again after the electrodes are wound.

[0064] As shown in Figure 11A, during the winding process, the flags interfere with each other, and the flags The flags are tensioned against each other so that a regular, alternating pattern is not formed. and / or aggregate. Therefore, in some embodiments, the unwound electrode sheet and / or the flag positions of the wound electrode rolls are substantially alternating on the final electrode roll. To form the flag pattern, a flag management device as shown in Figure 11B is used. They can be managed or processed by mechanical means. In some embodiments, the flag management device is mechanically controlled Flectors, angled rollers, directional air devices (e.g., pressurized air nozzles), or combinations thereof This includes combinations. For example, when a lateral electrode is wound onto a jelly roll, flat The flag control device does not tent or clamp the flag at each end of the electrode. Move, shift, and pull the flags toward the correct alternating positions within the jelly roll. Alternatively, it can be pressed.

[0065] In some embodiments, after the jelly roll is wrapped with a folded flag, a second step The pieces are picked up, and the flag is completed in their alternating positions. Several implementations In this case, the second step is to use a flag processing device. This post-winding flag processing is Mechanical deflectors, rollers, presses, directional air devices (e.g., directional air rings or air) This may be carried out by AJET, or a combination thereof. In some embodiments The roller is a continuous roller. In some embodiments, the press is a flat press, Selected from frame-shaped presses and combinations thereof.

[0066] Following the formation of the electrode rolls, the remaining electrode sheets that were not used to form the electrode rolls The excess portion can be removed by cutting. In some embodiments, the cutting is done by cutting with a blade. This is done by scissor cutting, laser cutting, or a combination thereof. The first electrode roll After cutting from the remaining electrode sheet, a second electrode roll is formed from the remaining electrode sheet. It is possible.

[0067] Inspect the electrode rolls to ensure they meet manufacturing parameters such as electrode roll height. The presence and / or the flags at each end of the roll without tenting or clamping It can be confirmed that they are arranged in an appropriate alternating pattern. In some embodiments, folding The flag is pressed against a clear glass or plastic window, and the image is pressed and folded. It is photographed through the window of the bent flag. Figure 12 is used to inspect the electrode roll. A schematic diagram of the inspection device is shown, and the inspection device consists of two glass plates and is arranged on the outer surface of the glass plates. Two image acquisition devices, a press assembly, and two glass plates are used to form electrode rolls. A press system comprising a hard stop assembly configured to press the end of This includes the image capture device. In Figure 12, the image capture device captures the anode and the cap of the electrode roll through the glass plate. Two electrode rolls are used to capture images of the pressed flag on the sword. It is shown pressed between glass plates. The inspection apparatus in Figure 12 also shows the gas when pressed. Jerry used to measure the height of electrode rolls, which is measured by the distance between lath plates. - Includes a JR (JR) height measuring assembly.

[0068] Figure 13A shows the process of pressing the edge against the glass plate, for example, using the inspection device shown in Figure 12. This illustrates a three-step process in which one end of the jelly roll is inspected. Using a robotic arm or press, the end of the roll is moved toward the glass inspection plate. Press. The ends are initially partially bent from the previous folding process during manufacturing. It approaches the glass plate in this state. As the flags are compressed more and arranged alternately, the edges become glass Continue pressing down on the lath plate. Finally, the edges are fully pressed against the glass inspection plate, and Therefore, the entire end flower structure is available for imaging by the image capture and processing system. It becomes Noh.

[0069] The electrode roll has flag formations at each end of the roll, with one end having a cathode flag. It should be understood that the other end has an anode flag. In some embodiments, During the inspection, the roll can be pressed against both glass plates and both ends simultaneously. In this method, during inspection, the roll is inspected at one end, and then the other end is inspected. It can be rotated. In some embodiments, during inspection, the roll is inspected at one end. The other end may then be moved to another inspection station for inspection.

[0070] The image processor is supplied with images of the fully compressed ends of the roll, damaged, and under tension. It can be used to identify flags that are caught and / or jammed. Image processing You can look for dark spots that indicate a clump or a set of damaged flags. Figure 13 B, Figures 13C and 13D show examples of rolls that are not properly folded, and the bend and The irregularly shaped flag creates a identifiable dark spot on the image. The image processor is Jerrylo You can find the flag that is bent outside the circumference of the circle. The image processor also does what To determine whether winding errors have occurred, differences in light reflectance and different wavelengths are considered, You can look for other indications that the flags were not smoothly alternating with each other. In the embodiment, the image processor analyzes properly bent electrodes and rolled electrodes. It has machine learning capabilities that are trained to generate weights and biases using deep learning. This can be done to retrieve a misfolded or damaged flag in the jelly roll. This helps in learning how to identify flags over time. If this occurs, an alarm, signal, or light will be activated to indicate that the electrode did not pass the test. It can be made to happen.

[0071] Once the electrode roll is formed, the electrode roll is used to form an electrode storage device such as a battery. They may be used, or packaged for storage and later used to form batteries. Good. In some embodiments, the bent flag of the electrode roll is electrically connected to the current collector. It is connected to a flag, which is used for pressure welding, solder joints, welding, and so on. These may be connected to the current collector in combination. In some embodiments, welding This is done by laser welding. In some embodiments, the electrode rolls are arranged inside the housing. The housing is then sealed. In some embodiments, an electrolyte is added to the housing. It can be done.

[0072] The wound electrode manufacturing process is carried out at high speed and / or in large quantities. In some embodiments, The electrode winding or winding process takes approximately, at least, or at least about 0.5 m / s , 0.6m / s, 0.7m / s, 0.8m / s, 0.9m / s, 1m / s, 1.2m / s , 1.4m / s, 1.6m / s, 1.8m / s, 2m / s, 2.2m / s, 2.4m / s , 2.6 m / s, 2.8 m / s, 3 m / s, 3.5 m / s, 4 m / s, 5 m / s, or This is done at a speed within any range of values ​​between them. For example, in some embodiments, electric The pole winding process is carried out at a speed of 1-3 m / s or approximately 1-3 m / s. In one embodiment, the high speed of the manufacturing process is accompanied by substantially alternatingly arranged flags. Precisely winds the electrode.

[0073] In one exemplary process, an electrode having a foil is provided, and a slit is formed in the foil. A flag is generated. The electrode is wound onto a jelly roll electrode, and the remaining Cut out the electrode film. Fold the straight flag of the cut wound electrode and position the flag. Manage the process. Next, inspect the wound electrodes for flag defects.

[0074] In another exemplary process, an electrode having a foil is provided, and a slit is formed in the foil. A rag is generated. The flag is folded inline, and the flag position is set just before winding. The electrodes are then managed and wound into jelly roll electrodes. The remaining electrode film is wound into the jelly roll electrodes. They are cut from the poles and inspected for flag defects.

[0075] After the roll with alternatingly arranged flags is manufactured, the roll is as shown in Figures 5A to 5C. As mentioned above, each end is electrically connected by welding, joining, or other means. It has a cathode and current collector and an electrolyte to form a lithium-ion battery. A cartridge is formed which can be placed in a can. In some embodiments, alternatingly arranged f The rags are electrically connected directly to each end of the can.

[0076] The foregoing disclosure is not limited to the exact form or embodiment disclosed herein. This is not intended. Therefore, whether explicitly stated or implied in this specification Notwithstanding any alternative forms, embodiments, and / or modifications of this disclosure, if they are to be interpreted in light of this disclosure It is considered possible to do so. While embodiments of this disclosure have been described in this manner, those skilled in the art will find this possible. As you can see, the form and details can be changed without departing from the scope of this disclosure. It is possible.

[0077] The above specification describes the present disclosure with reference to specific embodiments. However, our industry As anyone familiar with this field will understand, the various embodiments disclosed herein represent the spirit and scope of this disclosure. It can be modified or implemented in various other ways without deviating from the boundaries. This description should be considered illustrative and applies to various embodiments of the disclosed battery system. The purpose is to instruct those skilled in the art on how to create and use the method shown and described herein. It should be understood that the form of disclosure presented should be interpreted as a representative embodiment. Equivalent elements or materials may be substituted with those shown and described representatively in this specification. Furthermore, certain features of this disclosure may be used independently of the use of other features. All of this will become apparent to those skilled in the art after having benefited from this explanation of the disclosure. The words "include," "equip," "incorporate," and "consist of" used in patent claims, Expressions such as "to possess" and "to be" are to be interpreted in a non-exclusive manner, that is, clearly This is intended to allow for the existence of items, components, or elements that are not explicitly described. This is illustrated in the diagram. Furthermore, any reference to the singular form should be interpreted as also relating to the plural form.

[0078] Furthermore, the various embodiments disclosed herein are to be interpreted in an illustrative and descriptive sense. This should be the case and should not be interpreted as limiting this disclosure. The references (e.g., connection, association, combination, etc.) are intended to help the reader understand this disclosure. It is used only and does not imply any limitation with respect to the position, orientation, or use of the elements disclosed herein. It is not meant to cause a connection. Therefore, if there is any mention of a connection, it is not meant to be interpreted broadly. It should be done. Furthermore, any mention of such a connection does not necessarily mean that the two elements are related to each other. They are not necessarily directly connected.

[0079] Furthermore, although not limited to, "first," "second," "1," "other," or any other All numerical terms, including ordinary and / or numerical terms, are also various elements of this disclosure. In order to aid the reader's understanding of the embodiments, variations and / or modifications, the terms are used only as identifiers. It should be explained, in particular, any other element, embodiment, variation and / or modification. To the elements, embodiments, modifications and / or variations, or to other elements, embodiments and modifications and / or no restrictions are imposed regarding the order or priority beyond the examples of modifications.

[0080] To be useful for a specific application, one or more of the elements shown in the drawing / figure may be used. It may also be implemented in a more separated or integrated way, or in certain cases removed. It can be understood that this is acceptable.

Claims

1. A method for manufacturing a tablet energy storage device, The steps include providing an electrode layer in which an active material is arranged across a foil, The steps include forming a series of flags on the foil to form a flagged electrode, To form an electrode roll having a series of winding flags, the flagged electrode is wound The steps to take, The aforementioned wound flag is electrically connected to the current collector to form an energy storage device. A method that includes steps.

2. Before winding the aforementioned flagged electrode, the flag is bent in a series of bends. The method according to claim 1, which becomes a flag.

3. The bending is done by the deflector, roller, scoring spool, or a combination thereof. The method according to claim 2, which is carried out accordingly.

4. When the folded flag is wound up, the flag management device will implement the folded flag. The method according to claim 2, wherein the arrangement is moved to a qualitatively alternating configuration.

5. Claim 4, the flag management device comprises a diverter, a wheel, or an air nozzle. Methods used.

6. After winding the aforementioned flagged electrode, the flag is bent into a series of bends. The method according to claim 1, which results in a rag.

7. The method according to claim 6, wherein the folding is performed continuously.

8. Bending is performed by rollers, directional pneumatic devices, and combinations thereof. The method according to claim 7.

9. The method according to claim 6, wherein the folding is performed simultaneously.

10. Bending is performed by pressing, directional pneumatic devices, and combinations thereof. The method according to claim 9.

11. The method according to claim 6, wherein the folded flags are arranged in a substantially alternating manner.

12. The flag processing device moves the folded flags into a substantially alternating arrangement. The method according to claim 6.

13. The flag processing device includes a mechanical deflector, rollers, press, directional pneumatic device, or The method according to claim 12, comprising those combinations.

14. The electrode layer comprises a first section and a second section used to form the electrode roll. The method comprises a section, and the step of cutting the first and second sections The method according to claim 1, further comprising:

15. The claim according to claim 1 further includes the step of inspecting the winding flag of the electrode roll. method.

16. The method according to claim 1, wherein the electrode winding process is performed at a speed of approximately 1 to 3 m / s.

17. A method for manufacturing a wound electrode, The steps include providing an electrode layer comprising an active material arranged across a foil, The steps include forming a series of flags on the foil to form a flagged electrode, To form an electrode roll having a series of winding flags, the flagged electrode is wound The steps to take, The step of folding the aforementioned winding flag to form a folded winding flag, The folded flags are arranged in a form that is essentially alternating, A method that includes "Pu".

18. A method for manufacturing a wound electrode, The steps include providing an electrode layer comprising an active material arranged across a foil, The steps include forming a series of flags on the foil to form a flagged electrode, The aforementioned flag is folded to form a series of folded flags, resulting in an electrode with a folded flag. The steps to generate, The step of winding the aforementioned bent flag electrode to form an electrode roll, When the folded flag is being rolled up, each of the flags of the folded flag is substantially crossed A method involving steps directed toward an arranged form.

19. The electrode comprises a wound, flagged layer with an active material arranged across the foil, The foil comprises a series of flags, Each of the aforementioned series of flags is folded to form a substantially alternating arrangement. Alternatingly arranged electrodes with flags.

20. The active material is a silicon material, a graphite material, a graphite-containing material, a hard Carbon, soft carbon, carbon nanotubes, porous carbon, conductive carbon, Lithium nickel manganese cobalt oxide (NMC), lithium manganese oxide (LMO) ), lithium iron phosphate (LFP), lithium cobalt oxide (LCO), lithium titanate LTO (Lithium-Trichopropyl Alcohol), Lithium Nickel-Cobalt-Aluminum Oxide (NCA), Layered Transition Metals Oxides (e.g., LiCoO) 2 (LCO), Li(NiMnCo)O 2 (NMC) and / or LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA)), spinel manganese oxide (LiMn 2 O 4 (LMO) and / or LiMn 1.5 Ni 0.5 O 4 (LMNO), etc.), olivine (e.g., LiFePO 4 ), chalcogenide (LiTiS 2 ), Tavolite (LiFeSO 4 F) Silicon, silicon oxide (SiOx), aluminum, tin, tin oxide (SnOx), oxide Manganese (MnOx), molybdenum oxide (MoOx) 2 ), molybdenum disulfide (MoS 2 ),acid Nickel oxide (NiOx), copper oxide (CuOx), and lithium sulfide (Li 2 S), and The electrode according to claim 19, selected from a group consisting of such combinations.

21. The electrode according to claim 19, wherein the flag is square or trapezoidal in shape.

22. The aforementioned flags are angled at 5-10 degrees, 11-20 degrees, 21-30 degrees, or 10-15 degrees. The electrode according to claim 19.

23. The electrode according to claim 19, wherein each of the flags has a height of 1 to 10 mm.

24. The electrode according to claim 19, wherein each of the flags has a width of 1 to 10 mm.

25. The electrode according to claim 19, wherein the series of flags are formed from copper or aluminum.

26. The electrode according to claim 19, which is mounted inside a can having a lid.

27. The series of flags are electrically in communication with the lid of the can, as described in claim 26. very.

Images