Apparatus for manufacturing dry electrode and dry electrode manufacturing method

Abstract

An apparatus for manufacturing a dry electrode and a dry electrode manufacturing method are provided. An apparatus for manufacturing a dry electrode includes a feeder configured to supply fine powder and a plurality of rollers that calender the fine powder supplied from the feeder into a self-supporting film. A lamination roller is positioned adjacent to the plurality of rollers and configured to laminate a self-supporting film on a surface of a current collector. The control portion is connected to the feeder and controls the timing at which the fine powder is supplied by the feeder.

Description

Technical Field

[0001] The present disclosure relates to an apparatus for manufacturing a dry electrode and a method of manufacturing a dry electrode. Background Art

[0002] A rechargeable battery is a battery that can be charged and discharged.

[0003] Recently, there has been an increasing demand for an apparatus for manufacturing a solvent-free dry electrode for a rechargeable battery.

[0004] Conventional dry electrode manufacturing apparatuses can calender fine powder including an active material, a conductive material, and a binder into a free-standing film using calender rolls or the like, and the apparatuses can laminate the free-standing film on a current collector to manufacture a dry electrode. Conventional dry electrode manufacturing apparatuses can manufacture a dry electrode by continuously laminating free-standing films on a current collector. Accordingly, there is a problem in that it is difficult to form a non-coated portion where the free-standing film is not coated on the current collector. Summary of the Invention

[0005] Embodiments of the present disclosure provide an apparatus for manufacturing a dry electrode and a method of manufacturing a dry electrode, the dry electrode including a non-coated portion formed by intermittently laminating a free-standing film onto a current collector.

[0006] An apparatus for manufacturing a dry electrode according to an aspect of an embodiment includes: a first feeder configured to supply first fine powder; a plurality of first rolls configured to calender the first fine powder supplied from the first feeder into a first free-standing film; a first lamination roll positioned adjacent to the plurality of first rolls and configured to laminate the first free-standing film onto a first surface of a current collector; and a control portion connected to the first feeder and configured to control a timing of supplying the first fine powder by the first feeder.

[0007] The control portion may be configured to control the first feeder to intermittently supply the first fine powder to the plurality of first rolls, and the plurality of first rolls may be configured to calender the first fine powder into a plurality of first free-standing films spaced apart from each other.

[0008] The first lamination roll may intermittently laminate each of the first free-standing films onto the first surface of the current collector.

[0009] The control portion may include a first suction portion positioned adjacent to the first feeder, and the first suction portion may be configured to intermittently suck the first fine powder discharged from the first feeder.

[0010] The first suction portion may be connected to the first feeder and may be configured to re-supply the first fine powder sucked from the first feeder back to the first feeder.

[0011] The control section may further include a first sensor, which is provided together with the plurality of first rollers and configured to sense the intervals between each of the first self-supporting films.

[0012] The control section may be configured to control the intermittent suction timing of the first fine powder by the first suction section based on the intervals between the first self-supporting films sensed by the first sensor.

[0013] The apparatus may further include: a second feeder configured to supply a second fine powder; a plurality of second rollers configured to roll the second fine powder supplied from the second feeder into a second self-supporting film; and a second laminating roller positioned between the plurality of second rollers and the first laminating roller, the second laminating roller being configured to laminate the second self-supporting film on the second surface of the current collector. The control section is connected to the second feeder and configured to control the timing of supplying the second fine powder by the second feeder.

[0014] The control section may be configured to intermittently supply the second fine powder to the plurality of second rollers, and the plurality of second rollers may be configured to roll the second fine powder into a plurality of second self-supporting films spaced apart from each other.

[0015] The second laminating roller may intermittently laminate each of the second self-supporting films on the second surface of the current collector.

[0016] The control section may include a second suction section positioned adjacent to the second feeder, and the second suction section may be configured to intermittently suction the second fine powder discharged from the second feeder.

[0017] The second suction section may be connected to the second feeder and may be configured to re-supply the second fine powder suctioned from the second feeder back to the second feeder.

[0018] The control section may further include a sensor, which is provided together with the plurality of second rollers and configured to sense the intervals between each of the plurality of second self-supporting films.

[0019] The control section may be configured to control the intermittent suction timing of the second fine powder by the second suction section based on the intervals between the second self-supporting films sensed by the second sensor.

[0020] The apparatus may further include: a source roller configured to supply a current collector between the first laminating roller and the second laminating roller; and a rewinding roller configured to rewind the current collector on which the first self-supporting film and the second self-supporting film are laminated.

[0021] A method for manufacturing a dry electrode according to an aspect of an embodiment includes: rolling a first fine powder into a first self-supporting film; laminating the first self-supporting film on a first surface of a current collector; and controlling the supply timing of the first fine powder.

[0022] Controlling the supply timing of the first fine powder may include intermittently supplying the first fine powder, and rolling the first fine powder into a first self-supporting film may include rolling the intermittently supplied first fine powder into a plurality of first self-supporting films spaced apart from each other.

[0023] Laminating the first self-supporting film on the first surface of the current collector may include intermittently laminating each of the first self-supporting films on the first surface of the current collector.

[0024] The method may further include: rolling a second fine powder into a second self-supporting film; laminating the second self-supporting film on the second surface of the current collector; and controlling the supply timing of the second fine powder.

[0025] Controlling the supply timing of the first fine powder and controlling the supply timing of the second fine powder may be performed simultaneously such that the supply timing of the first fine powder is synchronized with the supply timing of the second fine powder.

[0026] According to an embodiment, there are provided an apparatus for manufacturing a dry electrode and a method for manufacturing a dry electrode, which manufacture a dry electrode including an uncoated portion by intermittently laminating a self-supporting film on a current collector. Description of the Drawings

[0027] Figure 1 is a side view showing an apparatus for manufacturing a dry electrode according to an embodiment.

[0028] Figure 2 is showing Figure 1 a side view of the first self-supporting film and the second self-supporting film laminated on the current collector as shown in part A of

[0029] Figure 3 is a plan view showing the lamination of the first self-supporting film on the current collector by an apparatus for manufacturing a dry electrode according to an embodiment.

[0030] Figure 4 is a side view showing an apparatus for manufacturing a dry electrode according to other embodiments.

[0031] Figure 5 is showing Figure 4 a side view of the first self-supporting film and the second self-supporting film laminated on the current collector as shown in part B of

[0032] Figure 6 is a flowchart showing a method for manufacturing a dry electrode according to an embodiment.

[0033] <Description of Reference Numerals>

[0034] First feeder 100, First roller 200, First laminating roller 300, Control section 900 Detailed Description

[0035] Embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, so that those skilled in the art can easily implement the embodiments. The present disclosure can be modified in various different ways, all of which do not depart from the scope of the present disclosure.

[0036] Unless explicitly stated to the contrary, the word "comprise" and variations such as "comprising" will be understood to mean including the stated elements but not excluding any other elements.

[0037] Reference will be made to Figures 1 to 3 describe an apparatus for manufacturing a dry electrode according to an embodiment.

[0038] The apparatus can be an apparatus for manufacturing a dry electrode for a rechargeable battery. However, the present disclosure is not limited thereto, and the apparatus for manufacturing a dry electrode can be an apparatus for manufacturing various known dry electrodes.

[0039] Figure 1 is a side view showing an apparatus for manufacturing a dry electrode according to an embodiment.

[0040] Reference Figure 1 , the dry electrode manufacturing apparatus 1000 according to an embodiment may include a first feeder 100, a first roller 200, a first laminating roller 300, a second feeder 400, a second roller 500, a second laminating roller 600, a source roller 700, a rewinding roller 800, and a control section (controller) 900.

[0041] The first feeder 100 can supply a first fine powder P1. In particular, the first feeder 100 can supply the first fine powder P1 to the first roller 200. The first fine powder P1 can include various known active materials, various known conductive materials, and various known binders. The first fine powder P1 can protect a metal oxide-based material. The conductive material can include carbon black. The binder can include polytetrafluoroethylene (PTFE). However, the present disclosure is not limited to such materials. The first fine powder P1 can be prepared by mixing the active material, the conductive material, and the binder using various known mixing means (or various known mixing devices) and fibrillizing the mixture into a fibrillized dry powder using various known fibrillizing means (or various known fibrillizing devices), but the present disclosure is not limited thereto.

[0042] The first feeder 100 may include various known storage means (or various known storage devices) capable of storing the first fine powder P1. The first feeder may also include various known discharging means (or various known discharging devices) for supplying the first fine powder P1 to the first roller 200. The first fine powder P1 supplied from the first feeder 100 to the first roller 200 may be rolled into a first self-supporting film F1.

[0043] The first roller 200 may include a plurality of first rollers 200. The plurality of first rollers 200 may roll the first fine powder P1 supplied from the first feeder 100 into a first self-supporting film F1. The plurality of first rollers 200 may be arranged in a first direction, and the first fine powder P1 may be supplied between the plurality of first rollers 200 to be rolled into a first self-supporting film F1. The plurality of first rollers 200 may roll the first fine powder P1 into a first self-supporting film F1 by rolling and stretching the first fine powder P1, but the present disclosure is not limited thereto. Each of the plurality of first rollers 200 may rotate at the same angular velocity. However, the present disclosure is not limited thereto because each of the plurality of first rollers 200 may rotate at a different angular velocity. For example, each of the plurality of first rollers 200 may rotate at an increasingly faster angular velocity or an increasingly slower angular velocity in the first direction toward the current collector 10. The first laminating roller 300 may be disposed adjacent to the first roller 200 at an end in the direction in which the plurality of first rollers 200 are positioned. The first laminating roller 300 may laminate the first self-supporting film F1 laminated by the plurality of first rollers 200 onto one surface of the current collector 10. The first laminating roller 300 may include various known laminating means (or various known laminating devices). The current collector 10 may move between the first laminating roller 300 and the second laminating roller 600 in a second direction intersecting the first direction along which the first roller is positioned. Here, the first direction may be a horizontal direction, and the second direction may be a vertical direction, but the present disclosure is not limited thereto.

[0044] The second feeder 400 may supply a second fine powder P2. In particular, the second feeder 400 may supply the second fine powder P2 to the second roller 500. The second fine powder P2 may include various known active materials, various known conductive materials, and various known binders. The second fine powder P2 may include a metal oxide-based material. The conductive material may include carbon black. The binder may include polytetrafluoroethylene (PTFE). However, the present disclosure is not limited to such materials. The second fine powder P2 may be prepared by mixing the active material, the conductive material, and the binder using various known mixing means (or various known mixing devices) and fibrillating the mixture into a fibrillated dry powder using various known fibrillating means (or various known fibrillating devices). However, the present disclosure is not limited thereto.

[0045] The second feeder 400 may include various known storage means (or various known storage devices) for storing the second fine powder P2 and various known discharging means (or various known discharging devices) for supplying the second fine powder P2 to the second roller 500. The second fine powder P2 supplied from the second feeder 400 to the second roller 500 may be rolled into a second self-supporting film F2.

[0046] The second roller 500 may include a plurality of second rollers 500. The plurality of second rollers 500 may roll the second fine powder P2 supplied from the second feeder 400 into a second self-supporting film F2. The plurality of second rollers 500 may be arranged in a first direction, and the second fine powder P2 may be supplied between the plurality of second rollers 500 to be rolled into a second self-supporting film F2. The plurality of second rollers 500 may roll the second fine powder P2 into a second self-supporting film F2 by rolling and stretching the second fine powder P2, but the present disclosure is not limited thereto. Each of the plurality of second rollers 500 may rotate at the same angular velocity, but the present disclosure is not limited thereto, and each of the plurality of second rollers 500 may rotate at a different angular velocity. For example, each of the plurality of second rollers 500 may rotate at an increasingly faster angular velocity or an increasingly slower angular velocity in a first direction toward the position where the current collector 10 is disposed. The second laminating roller 600 may be positioned adjacent to the second roller 500 located at an end in the first direction among the plurality of second rollers 500.

[0047] The second laminating roller 600 may be positioned between the plurality of second rollers 500 and the first laminating roller 300. The second laminating roller 600 may laminate the second self-supporting film F2 rolled by the plurality of second rollers 500 on the other surface of the current collector 10. The second laminating roller 600 may include various known laminating means (or various known laminating devices). The current collector 10 may move between the second laminating roller 600 and the first laminating roller 300 in a second direction intersecting the first direction.

[0048] The source roller 700 may supply the current collector 10 between the first laminating roller 300 and the second laminating roller 600. The source roller 700 may include various known supply means (or various known supply devices). The source roller 700 supplies the current collector 10 between the first laminating roller 300 and the second laminating roller 600 and various winding means (or various winding devices) for winding the current collector 10.

[0049] The rewinding roller 800 may rewind the current collector 10 on which the first self-supporting film F1 and the second self-supporting film F2 are laminated. The rewinding roller 800 may include various known rewinding means (or various known rewinding devices) for rewinding the current collector 10 on which the first self-supporting film F1 and the second self-supporting film F2 are laminated.

[0050] The control section 900 can be connected to the first feeder 100 and the second feeder 400. The control section 900 can control the timing of supplying the first fine powder P1 from the first feeder 100, and can control the timing of supplying the second fine powder P2 from the second feeder 400. The control section 900 can include various control means (or various control devices).

[0051] Figure 2 is a side view showing Figure 1 the first self-supporting film and the second self-supporting film laminated on the current collector as shown in part A. Figure 3 is a plan view showing the lamination of the first self-supporting film on the current collector by the apparatus for manufacturing a dry electrode according to an embodiment.

[0052] Reference Figures 1 to 3 , the control section 900 can control the timing of supplying the first fine powder P1 from the first feeder 100, and the first feeder 100 having the supply timing controlled by the control section 900 can intermittently supply the first fine powder P1 to the plurality of first rollers 200. The plurality of first rollers 200 can roll the intermittently supplied first fine powder P1 into a plurality of first self-supporting films F1 spaced apart from each other. The first laminating roller 300 can intermittently laminate each of the plurality of first self-supporting films F1 spaced apart from each other formed by the plurality of first rollers 200 onto the first surface 11 of the current collector 10. The supply timing of the first fine powder P1 of the first feeder 100 can be controlled by the control section 900 such that the first fine powder P1 is intermittently supplied to the plurality of first rollers 200, and such that the intermittently supplied first fine powder P1 is rolled by the plurality of first rollers 200 into a plurality of first self-supporting films F1 spaced apart from each other. Each of the plurality of first self-supporting films F1 can be intermittently laminated on the first surface 11 of the current collector 10 by the first laminating roller 300 such that the first self-supporting film F1 is coated on Figure 2 and Figure 3 the coated portion A2 of the current collector 10 shown, and the first self-supporting film F1 is not coated on the non-coated portion A1 of the current collector 10. Thus, a dry electrode including a coated portion A2 containing the electrode active material and a non-coated portion A1 not containing the electrode active material can be manufactured.

[0053] The control unit 900 can control the timing of supplying the second fine powder P2 from the second feeder 400, and the second feeder 400 whose supply timing is controlled by the control unit 900 can intermittently supply the second fine powder P2 to the plurality of second rollers 500. The plurality of second rollers 500 can roll the intermittently supplied second fine powder P2 into a plurality of second self-supporting films F2 spaced apart from each other. The second laminating roller 600 can intermittently laminate each of the plurality of second self-supporting films F2 formed by the plurality of second rollers 500 and spaced apart from each other onto the second surface 12 of the current collector 10. The timing of supplying the second fine powder P2 from the second feeder 400 can be controlled by the control unit 900 such that the second fine powder P2 is intermittently supplied to the plurality of second rollers 500, and the intermittently supplied second fine powder P2 is rolled by the plurality of second rollers 500 into a plurality of second self-supporting films F2 spaced apart from each other. Each of the plurality of second self-supporting films F2 can be intermittently laminated onto the second surface 12 of the current collector 10 by the second laminating roller 600 such that the second self-supporting film F2 is coated on Figure 2 the coated portion A2 of the current collector 10 shown in and the second self-supporting film F2 is not coated on the uncoated portion A1 of the current collector 10. Accordingly, a dry electrode including a coated portion A2 containing an electrode active material and an uncoated portion A1 not containing an electrode active material can be manufactured.

[0054] The control unit 900 can synchronize the timing of supplying the first fine powder P1 from the first feeder 100 with the timing of supplying the second fine powder P2 from the second feeder 400 such that the first self-supporting film F1 and the second self-supporting film F2 laminated on one surface 11 and the other surface 12 of the current collector 10, respectively, overlap each other in the horizontal direction, as shown in Figure 2 FIG. As another example, the control unit 900 can desynchronize the timing of supplying the first fine powder P1 from the first feeder 100 from the timing of supplying the second fine powder P2 from the second feeder 400 such that the first self-supporting film F1 and the second self-supporting film F2 laminated on one surface 11 and the other surface 12 of the current collector 10, respectively, do not overlap each other in the horizontal direction.

[0055] The control unit 900 can include a first suction part 910, a first sensor 920, a second suction part 930, and a second sensor 940.

[0056] The first suction part 910 may be positioned adjacent to the first feeder 100 and may intermittently suck the first fine powder P1 discharged from the first feeder 100. As the first suction part 910 intermittently sucks the first fine powder P1 discharged from the first feeder 100, the supply timing of the first fine powder P1 of the first feeder 100 may be controlled by the control part 900, and the first feeder 100 whose supply timing is controlled by the control part 900 may intermittently supply the first fine powder P1 to the plurality of first rollers 200. The first suction part 910 may be positioned within the movement path of the first fine powder P1 supplied by the first feeder 100, but the present disclosure is not limited thereto. The first suction part 910 may be connected to the first feeder 100. The first suction part 910 may re - supply the first fine powder P1 sucked from the first feeder 100 to the first feeder 100. The first suction part 910 may include various known suction means (or various known suction devices) and various known conveying means (or various known conveying devices).

[0057] The first sensor 920 may be positioned on the plurality of first rollers 200. The first sensor 920 may sense the interval between each of the first self - supporting films F1 calendered by the plurality of first rollers 200. The control part 900 may control the intermittent suction timing of the first fine powder P1 by the first suction part 910 based on the interval between the first self - supporting films F1 sensed by the first sensor 920. The first sensor 920 may include various known sensing means (or various known sensing devices), such as a vision sensor, a laser beam, etc. Therefore, the supply timing of the first fine powder P1 from the first feeder 100 may be controlled based on the interval between the first self - supporting films F1. Therefore, the interval between the first self - supporting films F1 intermittently laminated on the first surface 11 of the current collector 10 can be controlled, so as to control the length of the coated part A2 coated with the first self - supporting film F1 and the interval between the non - coated part A1 not coated with the first self - supporting film F1.

[0058] The second suction part 930 may be positioned adjacent to the second feeder 400 and may intermittently suck the second fine powder P2 discharged from the second feeder 400. Since the second suction part 930 intermittently sucks the second fine powder P2 discharged from the second feeder 400, the timing of supplying the second fine powder P2 from the second feeder 400 may be controlled by the control part 900, and the second feeder 400 controlled by the control part 900 may intermittently supply the second fine powder P2 to the plurality of second rollers 500. The second suction part 930 may be positioned within the movement path of the second fine powder P2 supplied by the second feeder 400, but the present disclosure is not limited thereto. The second suction part 930 may be connected to the second feeder 400. The second suction part 930 may re - supply the second fine powder P2 sucked from the second feeder 400 to the second feeder 400. The second suction part 930 may include various known suction means (or various known suction devices) and various known conveying means (or various known conveying devices).

[0059] The second sensor 940 may be positioned on the plurality of second rollers 500. The second sensor 940 may sense the interval between each of the second self - supporting films F2 calendered by the plurality of second rollers 500. The control part 900 may control the intermittent suction timing of the second fine powder P2 by the second suction part 930 based on the interval between the second self - supporting films F2 sensed by the second sensor 940. The second sensor 940 may include various known sensing means (or various known sensing devices), such as a vision sensor, a laser beam, etc. Therefore, the timing of supplying the second fine powder P2 from the second feeder 400 may be controlled based on the interval between the second self - supporting films F2. Therefore, the interval between the second self - supporting films F2 intermittently laminated on the second surface 12 of the current collector 10 can be controlled, so as to control the length of the coated part A2 coated with the second self - supporting film F2 and the interval between the non - coated part A1 not coated with the second self - supporting film F2.

[0060] The first self - supporting film F1 and the second self - supporting film F2 may be intermittently laminated on the current collector 10, thereby providing a dry electrode manufacturing apparatus for manufacturing a dry electrode including the non - coated part A1.

[0061] Hereinafter, reference will be made to Figure 4 and Figure 5 Describe an apparatus for manufacturing a dry electrode according to other embodiments. The parts different from the above - described dry electrode manufacturing apparatus of other embodiments will be described.

[0062] Figure 4 is a side view showing an apparatus for manufacturing a dry electrode according to other embodiments.

[0063] Reference Figure 4, according to other embodiments, the dry electrode manufacturing apparatus 1000 may include a first feeder 100, a first roller 200, a first laminating roller 300, a second feeder 400, a second roller 500, a second laminating roller 600, a source roller 700, a rewinding roller 800, and a control section (or controller) 900.

[0064] The control section 900 may be connected to the first feeder 100 and the second feeder 400. The control section 900 may control the timing of supplying the first fine powder P1 from the first feeder 100, and may control the timing of supplying the second fine powder P2 from the second feeder 400. The control section 900 may include various control means (or various control devices).

[0065] The control section 900 may be connected to each of the discharging means (or discharging device) of the first feeder 100 and the discharging means (or discharging device) of the second feeder 400 to control the supply timing of the first fine powder P1 discharged through the discharging means of the first feeder 100 and the supply timing of the second fine powder P2 discharged through the discharging means of the second feeder 400, but the present disclosure is not limited thereto.

[0066] Figure 5 is a side view showing Figure 4 in part B shown, where the first self-supporting film and the second self-supporting film are laminated on the current collector.

[0067] Reference Figure 4 and Figure 5 , the control section 900 may control the supply timing of the first fine powder P1 of the first feeder 100. The first feeder 100 controlled by the control section 900 may intermittently supply the first fine powder P1 to the plurality of first rollers 200. The plurality of first rollers 200 may roll the intermittently supplied first fine powder P1 into a plurality of first self-supporting films F1 spaced apart from each other. The first laminating roller 300 may intermittently laminate each of the plurality of first self-supporting films F1 onto the first surface 11 of the current collector 10. The timing of supplying the first fine powder P1 from the first feeder 100 may be controlled by the control section 900 such that the first fine powder P1 is intermittently supplied to the plurality of first rollers 200, and the intermittently supplied first fine powder P1 is rolled by the plurality of first rollers 200 into first self-supporting films F1 spaced apart from each other. Each of the plurality of first self-supporting films F1 may be intermittently laminated onto the first surface 11 of the current collector 10 by the first laminating roller 300 such that the first self-supporting film F1 is coated on Figure 5 the coated portion A2 of the current collector 10 shown in, and the first self-supporting film F1 is not coated on the non-coated portion A1 of the current collector 10. Accordingly, a dry electrode including a coated portion A2 coated with the electrode active material and a non-coated portion A1 not coated with the electrode active material may be manufactured.

[0068] The control unit 900 can control the timing of supplying the second fine powder P2 from the second feeder 400. The second feeder 400 controlled by the control unit 900 can intermittently supply the second fine powder P2 to the plurality of second rollers 500. The plurality of second rollers 500 can roll the intermittently supplied second fine powder P2 into a plurality of second self-supporting films F2 spaced apart from each other. The second laminating roller 600 can intermittently laminate each of the plurality of second self-supporting films F2 onto the other surface 12 of the current collector 10. The timing of supplying the second fine powder P2 from the second feeder 400 can be controlled by the control unit 900 such that the second fine powder P2 is intermittently supplied to the plurality of second rollers 500, and the intermittently supplied second fine powder P2 is rolled into a plurality of second self-supporting films F2 by the plurality of second rollers 500. Each of the plurality of second self-supporting films F2 can be intermittently laminated onto the other surface 12 of the current collector 10 by the second laminating roller 600 such that, as Figure 5 shown, the second self-supporting film F2 is coated on the coated portion A2 of the current collector 10 and the second self-supporting film F2 is not coated on the non-coated portion A1 of the current collector 10. Accordingly, a dry electrode including a coated portion A2 coated with an electrode active material and a non-coated portion A1 not coated with an electrode active material can be manufactured.

[0069] The control unit 900 can synchronize the timing of supplying the first fine powder P1 from the first feeder 100 with the timing of supplying the second fine powder P2 from the second feeder 400 such that the first self-supporting film F1 and the second self-supporting film F2 respectively laminated on one surface 11 and the other surface 12 of the current collector 10 overlap each other in the horizontal direction, as Figure 5 shown. As another example, the control unit 900 can desynchronize the timing of supplying the first fine powder P1 from the first feeder 100 from the timing of supplying the second fine powder P2 from the second feeder 400 such that the plurality of first self-supporting films F1 and the plurality of second self-supporting films F2 respectively laminated on one surface 11 and the other surface 12 of the current collector 10 do not overlap each other in the horizontal direction.

[0070] The first self-supporting film F1 and the second self-supporting film F2 can be intermittently laminated on the current collector 10, thereby providing a dry electrode manufacturing apparatus for manufacturing a dry electrode including a non-coated portion A1.

[0071] A method of manufacturing a dry electrode according to an embodiment will be described with reference to Figure 6 FIG. A dry electrode manufacturing method according to an embodiment can be performed using the dry electrode manufacturing apparatus according to the above-described embodiment, but the present disclosure is not limited thereto.

[0072] Figure 6 is a flowchart illustrating a method of manufacturing a dry electrode according to an embodiment.

[0073] Reference Figure 6 ,the first fine powder can be rolled into a first self-supporting film (step S100). For example, various known rolling means (or various known rolling devices) such as rolling rollers can be used to roll the first fine powder into a first self-supporting film.

[0074] Next, the first self-supporting film can be laminated on the first surface of the current collector (step S200). For example, various known lamination means (or various known lamination devices) such as lamination rollers can be used to laminate the first self-supporting film on the first surface of the current collector.

[0075] Next, the second fine powder can be rolled into a second self-supporting film (step S300). For example, various known rolling means (or various known rolling devices) such as rolling rollers can be used to roll the second fine powder into a second self-supporting film.

[0076] Next, the second self-supporting film can be laminated on the other surface of the current collector (step S400). For example, various known lamination means (or various known lamination devices) such as lamination rollers can be used to laminate the second self-supporting film on the second surface of the current collector.

[0077] Next, the supply timing of the first fine powder can be controlled (step S500). For example, using various known control means (or various known control devices), the supply timing of the first fine powder can be controlled and the first fine powder can be intermittently supplied so that the intermittently supplied first fine powder is rolled into a plurality of first self-supporting films spaced apart from each other.

[0078] Each of the plurality of first self-supporting films spaced apart from each other can be intermittently laminated on the first surface of the current collector. The supply timing of the first fine powder can be controlled so that the first fine powder is intermittently supplied and the intermittently supplied first fine powder is rolled into a plurality of first self-supporting films spaced apart from each other. Each of the plurality of first self-supporting films can be intermittently laminated on the first surface of the current collector so that the first self-supporting film is coated on the coated portion of the current collector and the first self-supporting film is not coated on the non-coated portion of the current collector. Therefore, a dry electrode including a coated portion coated with an electrode active material and a non-coated portion not coated with an electrode active material can be manufactured.

[0079] Next, the timing of supplying the second fine powder can be controlled (step S600). For example, using various known control means (or various known control devices), the supply timing of the second fine powder can be controlled and the second fine powder can be intermittently supplied so that the intermittently supplied second fine powder is rolled into a plurality of second self-supporting films spaced apart from each other.

[0080] Each of the plurality of second self-supporting films spaced apart from each other can be intermittently laminated on the second surface of the current collector. The supply timing of the second fine powder can be controlled such that the second fine powder is intermittently supplied and the intermittently supplied second fine powder is rolled into a plurality of second self-supporting films spaced apart from each other. Each of the plurality of second self-supporting films can be intermittently laminated on the second surface of the current collector such that the second self-supporting film is coated on the coated portion of the current collector and the second self-supporting film is not coated on the non-coated portion of the current collector. Accordingly, a dry electrode including a coated portion coated with an electrode active material and a non-coated portion not coated with an electrode active material can be manufactured.

[0081] The supply timing of the first fine powder and the supply timing of the second fine powder can be controlled simultaneously to be synchronized with each other such that each of the first self-supporting films laminated on the first surface of the current collector overlaps with one of the second self-supporting films laminated on the second surface of the current collector in the thickness direction of the current collector.

[0082] As another example, the supply timing of the first fine powder and the supply timing of the second fine powder can be controlled simultaneously to be out of synchronization with each other such that each of the first self-supporting films laminated on the first surface of the current collector does not overlap with one of the second self-supporting films laminated on the second surface of the current collector in the thickness direction of the current collector.

[0083] The first self-supporting film and the second self-supporting film can be intermittently laminated on the current collector, thereby providing a dry electrode manufacturing method for manufacturing a dry electrode including a non-coated portion.

[0084] Although the present disclosure has been described in connection with what is presently considered to be practical embodiments, it is to be understood that the present disclosure is not limited to the disclosed embodiments. The present disclosure encompasses various modifications and equivalent arrangements.

Claims

1. A device for manufacturing a dry electrode, the device comprising: a feeder configured to supply a fine powder; a plurality of rollers configured to calender the fine powder supplied from the feeder into a self-supporting film; a lamination roller positioned adjacent to the plurality of rollers, the lamination roller configured to laminate the self-supporting film on a surface of a current collector; as well as A control part is connected to the feeder and is configured to control a timing of supplying the fine powder by the feeder.

2. The apparatus according to claim 1, wherein the control portion is configured to control the feeder to intermittently supply the fine powder to the plurality of rollers, and the plurality of rollers are configured to calendar the fine powder into a plurality of the self-supporting films spaced apart from each other. 3 . The device of claim 2 , wherein the lamination roller intermittently laminates each of the self-supporting films to the surface of the current collector. 4 . The apparatus according to claim 2 , wherein the control portion comprises a suction portion located adjacent to the feeder, and the suction portion is configured to intermittently suction the fine powder discharged from the feeder. 5 . The apparatus according to claim 4 , wherein the suction portion is connected to the feeder, and is configured to resupply the fine powder sucked from the feeder back to the feeder. 6 . The apparatus according to claim 4 , wherein the control portion further comprises a sensor provided together with the plurality of rollers and configured to sense a space between each of the self-supporting films. 7 . The apparatus according to claim 6 , wherein the control portion is configured to control a timing of intermittent suction of the fine powder by the suction portion based on the interval between the self-supporting films sensed by the sensor.

8. The apparatus according to claim 1, wherein the feeder is a first feeder, the fine powder is a first fine powder, the plurality of rollers are a plurality of first rollers, the self-supporting film is a first self-supporting film, the surface of the self-supporting film is a first surface, and the laminating roller is a first laminating roller, The device further comprises: a second feeder configured to supply a second fine powder; a plurality of second rollers configured to calender the second fine powder supplied from the second feeder into a second self-supporting film; as well as a second laminating roller positioned between the plurality of second rollers and the first laminating roller, the second laminating roller being configured to laminate the second self-supporting film on the second surface of the current collector, and wherein the control portion is connected to the second feeder, and is configured to control a timing of supplying the second fine powder by the second feeder.

9. The apparatus according to claim 8, wherein the control portion is configured to control the second feeder to intermittently supply the second fine powder to the plurality of second rollers, and the plurality of second rollers are configured to calendar the second fine powder into a plurality of second self-supporting films spaced apart from each other. 10 . The device of claim 9 , wherein the second laminating roller intermittently laminates each of the second self-supporting films on the second surface of the current collector. 11 . The apparatus according to claim 8 , wherein the control part comprises a suction part located adjacent to the second feeder, and the suction part is configured to intermittently suction the second fine powder discharged from the second feeder. 12 . The apparatus according to claim 11 , wherein the suction portion is connected to the second feeder, and is configured to re-supply the second fine powder sucked from the second feeder back to the second feeder. 13 . The apparatus according to claim 11 , wherein the control part further comprises a sensor provided together with the plurality of second rollers and configured to sense a space between each of the second self-supporting films. 14 . The apparatus according to claim 13 , wherein the control portion is configured to control a timing of intermittent suction of the second fine powder by the suction portion based on the interval between the second self-supporting films sensed by the sensor.

15. The apparatus of claim 8, further comprising a source roller configured to supply the current collector between the first lamination roller and the second lamination roller; and The rewinding roller is configured to rewind the current collector on which the first self-supporting film and the second self-supporting film are laminated.

16. A method for manufacturing a dry electrode, the method comprising: Calendering the fine powder into a self-supporting film; laminating the self-supporting film on the surface of the current collector; as well as The supply timing of the fine powder is controlled. 17 . The method according to claim 16 , wherein controlling the supply timing of the fine powder comprises intermittently supplying the fine powder, and rolling the fine powder into the self-supporting film comprises rolling the intermittently supplied fine powder into a plurality of self-supporting films spaced apart from each other. 18 . The method of claim 17 , wherein laminating the self-supporting films on the surface of the current collector comprises intermittently laminating each of the self-supporting films on the surface of the current collector.

19. The method of claim 16, wherein the fine powder is a first fine powder, the self-supporting film is a first self-supporting film, the surface of the current collector is a first surface of the current collector, and Wherein the method further comprises: calendering the second fine powder into a second self-supporting film; laminating the second self-supporting film on the second surface of the current collector; as well as The supply timing of the second fine powder is controlled.

20. The method according to claim 19, wherein controlling the supply timing of the first fine powder and controlling the supply timing of the second fine powder are simultaneously performed so that the supply timing of the first fine powder and the supply timing of the second fine powder are synchronized with each other.

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