Dry electrode manufacturing apparatus and method

Abstract

To provide dry electrode manufacturing apparatus and method for manufacturing dry electrodes including uncoated portions.SOLUTION: A dry electrode manufacturing apparatus includes a first feeder that supplies first fine powder, a plurality of first rollers that calendar the first fine powder supplied from the first feeder into a first freestanding film, a first laminating roller adjacent to the plurality of first rollers that laminates the first freestanding film onto one side of a current collector, and a control unit connected to the first feeder and controlling a supply timing of the first fine powder from the first feeder.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This description relates to a dry electrode manufacturing apparatus and a dry electrode manufacturing method.

Background Art

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

[0003] Recently, there has been an increasing need for a dry electrode manufacturing apparatus for manufacturing a dry electrode for a secondary battery without using a solvent.

[0004] Conventional dry electrode manufacturing apparatuses can manufacture a dry electrode by calendaring fine powder containing an active material, a conductive material, and a binder onto a free-standing film using a calendaring roll or the like, and laminating the free-standing film onto a current collector.

[0005] Conventional dry electrode manufacturing apparatuses have a problem in that it is difficult to form a plain portion on the current collector where the free-standing film is not coated because the free-standing film is continuously laminated onto the current collector to manufacture the dry electrode.

Summary of the Invention

Problems to be Solved by the Invention

[0006] One embodiment provides a dry electrode manufacturing apparatus and a dry electrode manufacturing method for manufacturing a dry electrode including a plain portion by intermittently laminating a free-standing film onto a current collector.

Means for Solving the Problems

[0007] One embodiment provides a dry electrode manufacturing apparatus including a first feeder that supplies a first fine powder, a plurality of first rollers that calender the first fine powder supplied from the first feeder onto a first free-standing film, a first laminating roller that is adjacent to the plurality of first rollers and laminates the first free-standing film onto one surface of a current collector, and a control unit that is connected to the first feeder and controls the supply timing of the first fine powder of the first feeder.

[0008] The first feeder, whose supply timing is controlled by the control unit, intermittently supplies the first fine powder to the plurality of first rollers, and the plurality of first rollers can calender the first fine powder onto a plurality of first free-standing films spaced apart from each other.

[0009] The first laminating roller can intermittently laminate each of the plurality of first free-standing films onto one surface of the current collector.

[0010] The control unit can include a first suction unit that is adjacent to the first feeder and intermittently sucks the first fine powder discharged from the first feeder.

[0011] The first suction unit is connected to the first feeder and can re-supply the first fine powder sucked from the first feeder to the first feeder.

[0012] The control unit can further include a first sensor that is located on the plurality of first rollers and detects the interval between the plurality of first free-standing films spaced apart from each other.

[0013] The control unit can control the intermittent suction timing of the first fine powder by the first suction unit based on the interval between the plurality of first free-standing films detected by the first sensor.

[0014] A second feeder for supplying a second fine powder, a plurality of second rollers for calendaring the second fine powder supplied from the second feeder onto a second free-standing film, and a second laminating roller located between the plurality of second rollers and the first laminating roller for laminating the second free-standing film onto the other surface of the current collector, wherein the control unit is connected to the second feeder and can control the supply timing of the second fine powder of the second feeder.

[0015] The second feeder, whose supply timing is controlled by the control unit, intermittently supplies the second fine powder to the plurality of second rollers, and the plurality of second rollers can calendar the second fine powder onto a plurality of second free-standing films spaced apart from each other.

[0016] The second laminating roller can intermittently laminate each of the plurality of second free-standing films onto the other surface of the current collector.

[0017] The control unit can include a second suction unit adjacent to the second feeder for intermittently sucking the second fine powder discharged from the second feeder.

[0018] The second suction unit is connected to the second feeder and can re-supply the second fine powder sucked from the second feeder to the second feeder.

[0019] The control unit can further include a second sensor located on the plurality of second rollers for detecting the distance between the plurality of second free-standing films spaced apart from each other.

[0020] The control unit can control the intermittent inhalation timing of the second fine powder by the second inhalation unit based on the intervals between the plurality of second free-standing films detected by the second sensor.

[0021] The apparatus may further include a source roll that supplies the current collector between the first laminating roller and the second laminating roller, and a rewinding roll that rewinds the current collector laminated with the first free-standing film and the second free-standing film.

[0022] Also, one embodiment provides a dry electrode manufacturing method including the steps of calendaring a first fine powder on a first free-standing film, laminating the first free-standing film on one surface of a current collector, and controlling the supply timing of the first fine powder.

[0023] The step of controlling the supply timing of the first fine powder includes intermittently supplying the first fine powder, and the step of calendaring the first fine powder on the first free-standing film may include calendaring the intermittently supplied first fine powder on a plurality of first free-standing films spaced apart from each other.

[0024] The step of laminating the first free-standing film on one surface of the current collector may include intermittently laminating each of the plurality of first free-standing films on one surface of the current collector.

[0025] The method may further include the steps of calendaring a second fine powder on a second free-standing film, laminating the second free-standing film on the other surface of the current collector, and controlling the supply timing of the second fine powder.

[0026] The step of controlling the supply timing of the first fine powder and the step of controlling the supply timing of the second fine powder can be performed simultaneously.

Advantages of the Invention

[0027] According to one embodiment, a dry electrode manufacturing apparatus and a dry electrode manufacturing method for manufacturing a dry electrode including a non-patterned portion by intermittently laminating a free-standing film on a current collector are provided.

Brief Description of the Drawings

[0028]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those having ordinary knowledge in the technical field to which the present invention belongs can easily implement the present invention. The present invention can be embodied in various different forms and is not limited to the embodiments described herein.

[0030] Also, throughout the specification, when a part states that a certain component "includes" something, this means that, unless otherwise stated to the contrary, it can further include other components rather than excluding other components.

[0031] Hereinafter, with reference to FIGS. 1 to 3, a dry electrode manufacturing apparatus according to an embodiment will be described.

[0032] The dry electrode manufacturing apparatus according to an embodiment can be an apparatus for manufacturing a dry electrode for a secondary battery, but is not limited thereto, and can be an apparatus for manufacturing various known dry electrodes.

[0033] FIG. 1 is a side view showing a dry electrode manufacturing apparatus according to an embodiment.

[0034] Referring to FIG. 1, a dry electrode manufacturing apparatus 1000 according to an embodiment includes 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 roll 700, a rewinding roll 800, and a control unit 900.

[0035] The first feeder 100 supplies a first fine powder P1. The first feeder 100 supplies the first fine powder P1 to the first roller 200.

[0036] As an example, the first fine powder P1 includes various known active materials, conductive materials, and binders. The first fine powder P1 can include a metal oxide system, the conductive material can include carbon black, and the binder can include PTFE (polytetrafluoroethylene), but is not limited thereto. The first fine powder P1 can be manufactured by mixing (Mixing) the active material, conductive material, and binder as a mixture using various known mixing means, and fibrillizing (fibrillization) the mixture as a fibrillated dry powder using various known fibrillating means, but is not limited thereto.

[0037] The first feeder 100 can include various known storage means for storing the first fine powder P1 and various known discharging means 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 can be calendared onto the first free-standing film F1.

[0038] The first roller 200 includes a plurality of first rollers 200. The plurality of first rollers 200 calendar the first fine powder P1 supplied from the first feeder 100 onto the first free-standing film F1. The plurality of first rollers 200 are arranged in a first direction, and the first fine powder P1 can be supplied between the plurality of first rollers 200 and calendared onto the first free-standing film F1. As an example, the plurality of first rollers 200 can roll and stretch the first fine powder P1 and calendar it onto the first free-standing film F1, but is not limited thereto. Each of the plurality of first rollers 200 can rotate at the same angular velocity with respect to each other, but is not limited thereto and can rotate at different angular velocities with respect to each other. Each of the plurality of first rollers 200 can rotate at a gradually increasing angular velocity or a gradually decreasing angular velocity as it goes in the first direction in which the current collector 10 is located. Adjacent to the first roller 200 located at the rearmost end in the first direction among the plurality of first rollers 200, a first laminating roller 300 is located.

[0039] The first laminating roller 300 is adjacent to a plurality of first rollers 200 in a first direction. The first laminating roller 300 laminates the first free-standing film F1 calendared by the plurality of first rollers 200 onto one surface of the current collector 10. The first laminating roller 300 can include, but is not limited to, known various laminating means. The current collector 10 can move between the first laminating roller 300 and the second laminating roller 600 in another direction intersecting the first direction. Here, the first direction can include, but is not limited to, the horizontal direction. The other direction can include, but is not limited to, the vertical direction.

[0040] The second feeder 400 supplies the second fine powder P2. The second feeder 400 supplies the second fine powder P2 to the second roller 500.

[0041] As an example, the second fine powder P2 includes known various active materials, conductive materials, and binders. The second fine powder P2 includes a metal oxide system, the conductive material can include carbon black, and the binder can include, but is not limited to, PTFE (polytetrafluoroethylene). The second fine powder P2 can be manufactured by mixing (Mixing) the active material, conductive material, and binder as a mixture using known various mixing means, and fibrillizing the mixture as a dry powder fibrillized using known various fibrillizing means, but is not limited thereto.

[0042] The second feeder 400 can include known various storage means for storing the second fine powder P2 and known various discharging means 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 can be calendared onto the second free-standing film F2.

[0043] The second roller 500 includes a plurality of second rollers 500. The plurality of second rollers 500 calender the second fine powder P2 supplied from the second feeder 400 onto the second free-standing film F2. The plurality of second rollers 500 are arranged in a second direction, and the second fine powder P2 can be supplied between the plurality of second rollers 500 and calendered onto the second free-standing film F2. As an example, the plurality of second rollers 500 can calender the second fine powder P2 by rolling and stretching it onto the second free-standing film F2, but is not limited thereto. Each of the plurality of second rollers 500 can rotate at the same angular velocity with respect to each other, but is not limited thereto and can rotate at different angular velocities with respect to each other. Each of the plurality of second rollers 500 can rotate at a gradually increasing angular velocity or a gradually decreasing angular velocity as it goes in the second direction in which the current collector 10 is located. Adjacent to the second roller 500 located at the rearmost end in the second direction among the plurality of second rollers 500, a second laminating roller 600 is located.

[0044] The second laminating roller 600 is located between the plurality of second rollers 500 and the first laminating roller 300. The second laminating roller 600 laminates the second free-standing film F2 calendered by the plurality of second rollers 500 onto the other surface of the current collector 10. The second laminating roller 600 can include various known laminating means, but is not limited thereto. The current collector 10 can move in another direction intersecting the first direction and the second direction between the second laminating roller 600 and the first laminating roller 300.

[0045] The source roll 700 supplies the current collector 10 between the first laminating roller 300 and the second laminating roller 600. The source roll 700 can include various known supply means for supplying the current collector 10 between the first laminating roller 300 and the second laminating roller 600, and various winding means for winding up the current collector 10.

[0046] The rewinding roll 800 rewinds the current collector 10 laminated with the first free-standing film F1 and the second free-standing film F2. The rewinding roll 800 can include various known rewinding means for rewinding the current collector 10 laminated with the first free-standing film F1 and the second free-standing film F2.

[0047] The control unit 900 is connected to the first feeder 100 and the second feeder 400. The control unit 900 controls the supply timing of the first fine powder P1 of the first feeder 100 and the supply timing of the second fine powder P2 of the second feeder 400. The control unit 900 can include various control means.

[0048] FIG. 2 is a side view showing the current collector shown in part A of FIG. 1 laminated with the first free-standing film and the second free-standing film. FIG. 3 is a plan view showing the current collector laminated with the first free-standing film by a dry electrode manufacturing apparatus according to an embodiment.

[0049] As an example, referring to FIGS. 1 to 3, the control unit 900 controls the supply timing of the first fine powder P1 of the first feeder 100, and the first feeder 100 whose supply timing is controlled by the control unit 900 intermittently supplies the first fine powder P1 to the plurality of first rollers 200. The plurality of first rollers 200 calender the first fine powder P1 supplied intermittently to a plurality of first free-standing films F1 spaced apart from each other. The first laminating roller 300 intermittently laminates each of the plurality of first free-standing films F1 spaced apart from each other by the plurality of first rollers 200 on one surface 11 of the current collector 10. By controlling the supply timing of the first fine powder P1 of the first feeder 100 by the control unit 900, the first fine powder P1 is intermittently supplied to the plurality of first rollers 200, the plurality of first free-standing films F1 spaced apart from each other by the plurality of first rollers 200 are calendered, and each of the plurality of first free-standing films F1 is intermittently laminated on one surface 11 of the current collector 10 by the first laminating roller 300. As a result, the first free-standing film F1 is coated on the coating portion A2 of the current collector 10 shown in FIGS. 2 and 3, and the first free-standing film F1 is not coated on the plain portion A1 of the current collector 10. Therefore, a dry electrode including a coating portion A2 coated with an electrode active material and a plain portion A1 not coated with an electrode active material can be manufactured.

[0050] The control unit 900 controls the supply timing of the second fine powder P2 of the second feeder 400, and the second feeder 400 whose supply timing is controlled by the control unit 900 intermittently supplies the second fine powder P2 to the plurality of second rollers 500. The plurality of second rollers 500 calender the second fine powder P2 supplied intermittently to the plurality of second free-standing films F2 spaced apart from each other. The second laminating roller 600 intermittently laminates each of the plurality of second free-standing films F2 spaced apart from each other by the plurality of second rollers 500 on the other surface 12 of the current collector 10. By controlling the supply timing of the second fine powder P2 of the second feeder 400 by the control unit 900, the second fine powder P2 is intermittently supplied to the plurality of second rollers 500, and the plurality of second free-standing films F2 spaced apart from each other by the plurality of second rollers 500 are calendered, and each of the plurality of second free-standing films F2 is intermittently laminated on the other surface 12 of the current collector 10 by the second laminating roller 600. As a result, the second free-standing film F2 is coated on the coating portion A2 of the current collector 10 shown in FIG. 2, and the second free-standing film F2 is not coated on the plain portion A1 of the current collector 10. Therefore, a dry electrode including a coating portion A2 coated with an electrode active material and a plain portion A1 not coated with an electrode active material can be manufactured.

[0051] As another example, the control unit 900 synchronizes the supply timing of the first fine powder P1 of the first feeder 100 and the supply timing of the second fine powder P2 of the second feeder 400, and horizontally overlaps each of the plurality of first free-standing films F1 and the plurality of second free-standing films F2 laminated on one surface 11 and the other surface 12 of the current collector 10 in FIG. 2.

[0052] As another example, the control unit 900 synchronizes the supply timing of the first fine powder P1 of the first feeder 100 and the supply timing of the second fine powder P2 of the second feeder 400 with each other, so that a plurality of first free-standing films F1 laminated on one surface 11 and the other surface 12 of the current collector 10 and a plurality of second free-standing films F2 cannot be horizontally overlapped with each other as shown in FIG. 2.

[0053] The control unit 900 includes a first suction unit 910, a first sensor 920, a second suction unit 930, and a second sensor 940.

[0054] The first suction unit 910 is adjacent to the first feeder 100 and intermittently sucks the first fine powder P1 discharged from the first feeder 100. By intermittently sucking the first fine powder P1 discharged from the first feeder 100 by the first suction unit 910, the supply timing of the first fine powder P1 of the first feeder 100 is controlled by the control unit 900, and the first feeder 100 whose supply timing is controlled by the control unit 900 intermittently supplies the first fine powder P1 to the plurality of first rollers 200. The first suction unit 910 can be located within the movement path of the first fine powder P1 supplied by the first feeder 100, but is not limited thereto. The first suction unit 910 is connected to the first feeder 100. The first suction unit 910 re-supplies the first fine powder P1 sucked from the first feeder 100 to the first feeder 100. As an example, the first suction unit 910 can include known various suction means and transfer means.

[0055] The first sensor 920 is positioned on a plurality of first rollers 200. The first sensor 920 detects the intervals between a plurality of mutually separated first free-standing films F1 calendared by the plurality of first rollers 200. The control unit 900 can control the intermittent inhalation timing of the first fine powder P1 by the first inhalation unit 910 based on the intervals between the plurality of first free-standing films F1 detected by the first sensor 920. The first sensor 920 can include various known detection means such as vision and laser beam. By the control unit 900 controlling the intermittent inhalation timing of the first fine powder P1 by the first inhalation unit 910 based on the intervals between the plurality of first free-standing films F1 detected by the first sensor 920, the supply timing of the first fine powder P1 of the first feeder 100 is controlled based on the intervals between the plurality of first free-standing films F1, so that the intervals between the plurality of first free-standing films F1 are controlled. Therefore, the intervals between the plurality of first free-standing films F1 intermittently laminated on one surface 11 of the current collector 10 are controlled, and in the current collector 10 coated with the plurality of first free-standing films F1, the length of the coating portion A2 coated with the first free-standing film F1 and the interval of the plain portion A1 not coated with the first free-standing film F1 can be controlled.

[0056] The second inhalation unit 930 is adjacent to the second feeder 400 and intermittently inhales the second fine powder P2 discharged from the second feeder 400. By the second inhalation unit 930 intermittently inhaling the second fine powder P2 discharged from the second feeder 400, the supply timing of the second fine powder P2 of the second feeder 400 is controlled by the control unit 900, and the second feeder 400 whose supply timing is controlled by the control unit 900 intermittently supplies the second fine powder P2 to the plurality of second rollers 500. The second inhalation unit 930 can be located within the movement path of the second fine powder P2 supplied by the second feeder 400, but is not limited thereto. The second inhalation unit 930 is connected to the second feeder 400. The second inhalation unit 930 re-supplies the second fine powder P2 inhaled from the second feeder 400 to the second feeder 400. As an example, the second inhalation unit 930 can include known various inhalation means and transfer means.

[0057] The second sensor 940 is located on a plurality of second rollers 500. The second sensor 940 detects the intervals between a plurality of mutually separated second free-standing films F2 calendared by the plurality of second rollers 500. The control unit 900 can control the intermittent inhalation timing of the second fine powder P2 by the second inhalation unit 930 based on the intervals between the plurality of second free-standing films F2 detected by the second sensor 940. The second sensor 940 can include various known detection means such as vision and laser beam. By the control unit 900 controlling the intermittent inhalation timing of the second fine powder P2 by the second inhalation unit 930 based on the intervals between the plurality of second free-standing films F2 detected by the second sensor 940, the supply timing of the second fine powder P2 of the second feeder 400 is controlled based on the intervals between the plurality of second free-standing films F2, and thus the intervals between the plurality of second free-standing films F2 are controlled. Therefore, the intervals between the plurality of second free-standing films F2 intermittently laminated on one surface 11 of the current collector 10 are controlled, and in the current collector 10 coated with the plurality of second free-standing films F2, the length of the coating portion A2 coated with the second free-standing film F2 and the interval of the plain portion A1 not coated with the second free-standing film F2 can be controlled.

[0058] As an example, a dry electrode manufacturing apparatus for manufacturing a dry electrode including a plain portion A1 is provided by intermittently laminating a first free-standing film F1 and a second free-standing film F2 on a current collector 10.

[0059] Hereinafter, with reference to FIGS. 4 and 5, a dry electrode manufacturing apparatus according to another embodiment will be described. Hereinafter, the parts different from the dry electrode manufacturing apparatus according to the above-described one embodiment will be described.

[0060] FIG. 4 is a side view showing a dry electrode manufacturing apparatus according to another embodiment.

[0061] Referring to FIG. 4, a dry electrode manufacturing apparatus 1000 according to another embodiment includes 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 roll 700, a rewinding roll 800, and a control unit 900.

[0062] The control unit 900 is connected to the first feeder 100 and the second feeder 400. The control unit 900 controls the supply timing of the first fine powder P1 of the first feeder 100 and the supply timing of the second fine powder P2 of the second feeder 400. The control unit 900 can include various control means.

[0063] As an example, the control unit 900 is connected to the discharge means of the first feeder 100 and the discharge means of the second feeder 400 respectively, and can control the supply timing of the first fine powder P1 discharged through the discharge means of the first feeder 100 and the supply timing of the second fine powder P2 discharged through the discharge means of the second feeder 400, but is not limited thereto.

[0064] FIG. 5 is a side view showing a current collector shown in part B of FIG. 4 with a first free-standing film and a second free-standing film laminated thereon.

[0065] Referring to FIGS. 4 and 5, the control unit 900 controls the supply timing of the first fine powder P1 of the first feeder 100, and the first feeder 100 whose supply timing is controlled by the control unit 900 intermittently supplies the first fine powder P1 to the plurality of first rollers 200. The plurality of first rollers 200 calender the first fine powder P1 supplied intermittently to the plurality of first free-standing films F1 spaced apart from each other. The first laminating roller 300 intermittently laminates each of the plurality of first free-standing films F1 spaced apart from each other by the plurality of first rollers 200 on one surface 11 of the current collector 10. By controlling the supply timing of the first fine powder P1 of the first feeder 100 by the control unit 900, the first fine powder P1 is intermittently supplied to the plurality of first rollers 200, the plurality of first free-standing films F1 spaced apart from each other by the plurality of first rollers 200 are calendered, and each of the plurality of first free-standing films F1 is intermittently laminated on one surface 11 of the current collector 10 by the first laminating roller 300. As a result, the first free-standing film F1 is coated on the coating portion A2 of the current collector 10 shown in FIG. 5, and the first free-standing film F1 is not coated on the plain portion A1 of the current collector 10. Therefore, a dry electrode including a coating portion A2 coated with the electrode active material and a plain portion A1 not coated with the electrode active material can be manufactured.

[0066] The control unit 900 controls the supply timing of the second fine powder P2 of the second feeder 400. The second feeder 400, whose supply timing is controlled by the control unit 900, intermittently supplies the second fine powder P2 to a plurality of second rollers 500. The plurality of second rollers 500 calender the intermittently supplied second fine powder P2 onto a plurality of second free-standing films F2 spaced apart from each other. The second laminating roller 600 intermittently laminates each of the plurality of second free-standing films F2 spaced apart from each other by the plurality of second rollers 500 onto the other surface 12 of the current collector 10. By controlling the supply timing of the second fine powder P2 of the second feeder 400 by the control unit 900, the second fine powder P2 is intermittently supplied to the plurality of second rollers 500, the plurality of second free-standing films F2 spaced apart from each other are calendered by the plurality of second rollers 500, and each of the plurality of second free-standing films F2 is intermittently laminated onto the other surface 12 of the current collector 10 by the second laminating roller 600. As a result, the second free-standing film F2 is coated on the coating portion A2 of the current collector 10 shown in FIG. 5, and the second free-standing film F2 is not coated on the plain portion A1 of the current collector 10. Therefore, a dry electrode including a coating portion A2 coated with the electrode active material and a plain portion A1 not coated with the electrode active material can be manufactured.

[0067] As another example, the control unit 900 synchronizes the supply timing of the first fine powder P1 of the first feeder 100 and the supply timing of the second fine powder P2 of the second feeder 400, so that the plurality of first free-standing films F1 and the plurality of second free-standing films F2 laminated on the one surface 11 and the other surface 12 of the current collector 10, respectively, can be horizontally overlapped with each other in FIG. 5.

[0068] As another example, the control unit 900 synchronizes the supply timing of the first fine powder P1 of the first feeder 100 and the supply timing of the second fine powder P2 of the second feeder 400 with each other, so that a plurality of first free-standing films F1 laminated on one surface 11 and the other surface 12 of the current collector 10 and a plurality of second free-standing films F2 cannot be horizontally overlapped with each other as shown in FIG. 5.

[0069] As an example, a dry electrode manufacturing apparatus for manufacturing a dry electrode including a plain portion A1 is provided by intermittently laminating a first free-standing film F1 and a second free-standing film F2 on a current collector 10.

[0070] Hereinafter, a dry electrode manufacturing method according to another embodiment will be described with reference to FIG. 6. The dry electrode manufacturing method according to another embodiment can be performed using the dry electrode manufacturing apparatus according to the above-described one embodiment or the dry electrode manufacturing apparatus according to another embodiment, but is not limited thereto.

[0071] FIG. 6 is a flowchart showing a dry electrode manufacturing method according to another embodiment.

[0072] Next, referring to FIG. 6, the first fine powder is calendared onto the first free-standing film (S100).

[0073] Specifically, the first fine powder is calendared onto the first free-standing film using various known calendaring means such as a calendaring roller.

[0074] Next, the first free-standing film is laminated on one surface of the current collector (S200).

[0075] Specifically, the first free-standing film is laminated on one surface of the current collector using various known lamination means such as a lamination roller.

[0076] Next, the second fine powder is calendared onto the second free-standing film (S300).

[0077] Specifically, the second fine powder is calendared onto the second free-standing film by using various known calendaring means such as a calendaring roller.

[0078] Next, the second free-standing film is laminated onto the other surface of the current collector (S400).

[0079] Specifically, the second free-standing film is laminated onto the other surface of the current collector by using various known lamination means such as a lamination roller. Control the supply timing of the first fine powder (S500).

[0080] Specifically, by using various known control means to control the supply timing of the first fine powder and intermittently supplying the first fine powder, the intermittently supplied first fine powder is calendared onto a plurality of first free-standing films spaced apart from each other.

[0081] Each of the plurality of first free-standing films spaced apart from each other is intermittently laminated onto one surface of the current collector. By controlling the supply timing of the first fine powder, the first fine powder is intermittently supplied, the plurality of first free-standing films spaced apart from each other are calendared, and each of the plurality of first free-standing films is intermittently laminated onto one surface of the current collector. As a result, the first free-standing film is coated on the coated portion of the current collector, and the first free-standing film is not coated on the uncoated portion of the current collector. Therefore, a dry electrode including a coated portion coated with the electrode active material and an uncoated portion not coated with the electrode active material can be manufactured.

[0082] Next, control the supply timing of the second fine powder (S600).

[0083] Specifically, use known various control means to control the supply timing of the second fine powder, and by intermittently supplying the second fine powder, calender the intermittently supplied second fine powder onto a plurality of second free-standing films separated from each other.

[0084] Intermittently laminate each of the plurality of second free-standing films separated from each other onto the other surface of the current collector. By controlling the supply timing of the second fine powder, the second fine powder is intermittently supplied, the plurality of second free-standing films separated from each other are calendered, and each of the plurality of second free-standing films is intermittently laminated onto the other surface of the current collector, so that the second free-standing film is coated on the coated portion of the current collector and the second free-standing film is not coated on the uncoated portion of the current collector. Therefore, a dry electrode including a coated portion coated with the electrode active material and an uncoated portion not coated with the electrode active material can be manufactured.

[0085] As an example, by simultaneously controlling and synchronizing the supply timing of the first fine powder and the supply timing of the second fine powder, each of the plurality of first free-standing films and the plurality of second free-standing films laminated on one surface and the other surface of the current collector, respectively, can be overlapped with each other in the thickness direction of the current collector.

[0086] As another example, by simultaneously controlling and synchronizing the supply timing of the first fine powder and the supply timing of the second fine powder with each other, each of the plurality of first free-standing films and the plurality of second free-standing films laminated on one surface and the other surface of the current collector, respectively, cannot be overlapped with each other in the thickness direction of the current collector.

[0087] As an example, a dry electrode manufacturing method for manufacturing a dry electrode including a plain part is provided by intermittently laminating a first free-standing film and a second free-standing film on a current collector.

[0088] Although the embodiments of the present invention have been described in detail above, the scope of the rights of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims also belong to the scope of the rights of the present invention.

Explanation of Signs

[0089] 100 First feeder 200 First roller 300 First laminating roller 900 Control unit

Claims

1. a first feeder for providing a first fine powder; a plurality of first rollers for calendering the first fine powder provided from the first feeder into a first freestanding film; a first laminating roller adjacent to the plurality of first rollers and configured to laminate the first free-standing film onto one side of a current collector; and a control unit connected to the first feeder and controlling a timing of supplying the first fine powder from the first feeder; A dry electrode manufacturing apparatus comprising:

2. The first feeder, the supply timing of which is controlled by the control unit, intermittently supplies the first fine powder to the first rollers, 2. The apparatus of claim 1, wherein the first rollers calender the first fine powder into a plurality of spaced apart first free-standing films.

3. The dry electrode manufacturing apparatus according to claim 2 , wherein the first laminating roller intermittently laminates each of the plurality of first free-standing films onto one surface of the current collector.

4. The control unit is 3. The apparatus of claim 2, further comprising a first suction unit adjacent to the first feeder and intermittently suctioning the first fine powder discharged from the first feeder.

5. The apparatus of claim 4 , wherein the first suction unit is connected to the first feeder and re-supplies the first fine powder sucked from the first feeder to the first feeder.

6. The control unit is The dry electrode manufacturing apparatus according to claim 4 , further comprising a first sensor located on the first rollers and configured to detect a distance between the first free-standing films spaced apart from one another.

7. The dry electrode manufacturing apparatus of claim 6, wherein the control unit controls a timing of intermittent inhalation of the first fine powder by the first suction unit based on the interval between the plurality of first freestanding films detected by the first sensor.

8. a second feeder for feeding a second fine powder; a plurality of second rollers for calendering the second fine powder provided by the second feeder into a second freestanding film; and a second laminating roller positioned between the plurality of second rollers and the first laminating roller, for laminating the second free-standing film onto the other surface of the current collector; Further comprising: The apparatus of claim 1 , wherein the control unit is connected to the second feeder and controls a timing of supplying the second fine powder from the second feeder.

9. the second feeder, the supply timing of which is controlled by the control unit, intermittently supplies the second fine powder to the second rollers; 9. The apparatus of claim 8, wherein the second rollers calender the second fine powder into a plurality of spaced apart second free-standing films.

10. The dry electrode manufacturing apparatus according to claim 9 , wherein the second laminating roller intermittently laminates each of the plurality of second free-standing films onto the other surface of the current collector.

11. The control unit is The apparatus for manufacturing a dry electrode according to claim 8 , further comprising: a second suction unit adjacent to the second feeder and intermittently suctioning the second fine powder discharged from the second feeder.

12. The apparatus of claim 11, wherein the second suction unit is connected to the second feeder and re-supplies the second fine powder sucked from the second feeder to the second feeder.

13. The control unit is The dry electrode manufacturing apparatus according to claim 11 , further comprising a second sensor located on the second rollers and configured to detect a distance between the second free-standing films spaced apart from one another.

14. The dry electrode manufacturing apparatus of claim 13, wherein the control unit controls a timing of intermittent inhalation of the second fine powder by the second suction unit based on the interval between the plurality of second freestanding films detected by the second sensor.

15. a source roll that supplies the current collector between the first laminating roller and the second laminating roller; and A rewind roll that rewinds the current collector on which the first free-standing film and the second free-standing film are laminated. The dry electrode manufacturing apparatus according to claim 8 , further comprising:

16. calendering the first fine powder into a first freestanding film; laminating the first free-standing film onto one side of a current collector; and Controlling the timing of supplying the first fine powder. A dry electrode manufacturing method comprising:

17. The step of controlling the supply timing of the first fine powder includes the step of intermittently supplying the first fine powder, 17. The method of claim 16, wherein the step of calendering the first fine powder into a first freestanding film comprises the step of calendering the intermittently supplied first fine powder into a plurality of spaced apart first freestanding films.

18. 20. The method of claim 17, wherein the step of laminating the first freestanding film to one surface of the current collector comprises intermittently laminating each of the plurality of first freestanding films to one surface of the current collector.

19. calendering the second fine powder into a second freestanding film; laminating the second free-standing film to the other side of the current collector; and Controlling the timing of supplying the second fine powder.

17. The dry electrode manufacturing method of claim 16, further comprising:

20. 20. The method of claim 19, wherein the step of controlling the timing of supplying the first fine powder and the step of controlling the timing of supplying the second fine powder are performed simultaneously.

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