Dry electrode manufacturing apparatus and dry electrode manufacturing 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

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[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, the need for a dry electrode manufacturing apparatus for manufacturing a dry electrode for a secondary battery without using a solvent has been increasing.

[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 on a free-standing film using a calendaring roll or the like, and laminating the free-standing film on 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 on 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 on a current collector.

Means for Solving the Problems

[0007] One embodiment provides a dry electrode manufacturing apparatus including a first feeder for supplying a first fine powder, a plurality of first rollers for calendering the first fine powder supplied from the first feeder onto a first freestanding film, a first laminating roller adjacent to the plurality of first rollers for laminating the first freestanding film onto one surface of a current collector, and a control unit connected to the first feeder for controlling the supply timing of the first fine powder from 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 freestanding films spaced apart from each other.

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

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

[0011] The first suction unit is connected to the first feeder and can resupply the first fine powder drawn in from the first feeder to the first feeder.

[0012] The control unit may further include a first sensor located on the plurality of first rollers for detecting the distance between the plurality of first freestanding films that are spaced apart from each other.

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

[0014] The system further includes a second feeder for supplying a second fine powder, a plurality of second rollers for calendering the second fine powder supplied from the second feeder onto a second freestanding film, and a second laminating roller located between the plurality of second rollers and the first laminating roller for laminating the second freestanding film onto the other side of the current collector, wherein the control unit is connected to the second feeder and can control the timing of the supply of the second fine powder by 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 calender the second fine powder onto a plurality of second freestanding films spaced apart from each other.

[0016] The second laminating roller can intermittently laminate each of the plurality of second freestanding films to the other surface of the current collector.

[0017] The control unit is adjacent to the second feeder and may include a second suction unit that intermittently sucks in the second fine powder discharged from the second feeder.

[0018] The aforementioned second suction unit is connected to the aforementioned second feeder, and can resupply the aforementioned second fine powder drawn in from the aforementioned second feeder to the aforementioned second feeder.

[0019] The control unit may further include a second sensor located on the plurality of second rollers for detecting the distance between the plurality of second freestanding films that are spaced apart from each other.

[0020] The control unit can control the timing of the intermittent suction 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.

[0021] The system may further include a source roll for supplying the current collector between the first laminating roller and the second laminating roller, and a rewind roll for rewinding the current collector laminated with the first freestanding film and the second freestanding film.

[0022] Furthermore, one embodiment provides a dry electrode manufacturing method that includes the steps of: calendering a first fine powder onto a first freestanding film; laminating the first freestanding film onto 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 the step of supplying the first fine powder intermittently, and the step of calendering the first fine powder onto a first freestanding film may include the step of calendering the intermittently supplied first fine powder onto a plurality of first freestanding films spaced apart from each other.

[0024] The step of laminating the first freestanding film to one surface of the current collector may include the step of intermittently laminating each of the plurality of first freestanding films to one surface of the current collector.

[0025] The steps may further include calendering a second fine powder onto a second freestanding film, laminating the second freestanding film onto the other side of the current collector, and controlling the timing of supplying the second fine powder.

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

Advantages of the Invention

[0027] According to one embodiment, there are provided 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.

Brief Description of the Drawings

[0028] [Figure 1] FIG. 1 is a side view showing a dry electrode manufacturing apparatus according to one embodiment. [Figure 2] FIG. 2 is a side view showing a current collector shown in a portion A of FIG. 1 with a first free-standing film and a second free-standing film laminated thereon. [Figure 3] FIG. 3 is a plan view showing a current collector with a first free-standing film laminated thereon by a dry electrode manufacturing apparatus according to one embodiment. [Figure 4] FIG. 4 is a side view showing a dry electrode manufacturing apparatus according to another embodiment. [Figure 5] FIG. 5 is a side view showing a current collector shown in a portion B of FIG. 4 with a first free-standing film and a second free-standing film laminated thereon. [Figure 6] FIG. 6 is a flowchart showing a dry electrode manufacturing method according to another embodiment.

Modes for Carrying Out the Invention

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

[0030] Furthermore, when a specification states that a part of it "includes" a certain component, unless otherwise specified, this means that it may include other components rather than excluding them.

[0031] A dry electrode manufacturing apparatus according to one embodiment will be described below with reference to Figures 1 to 3.

[0032] A dry electrode manufacturing apparatus according to one embodiment may be an apparatus for manufacturing dry electrodes for secondary batteries, but is not limited thereto, and may be an apparatus for manufacturing various known dry electrodes.

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

[0034] Referring to Figure 1, a dry electrode manufacturing apparatus 1000 according to one 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 rewind roll 800, and a control unit 900.

[0035] The first feeder 100 supplies the 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 comprises a variety of known active materials, conductive materials, and binders. The first fine powder P1 may, but is not limited to, a metal oxide system, a conductive material including carbon black, and a binder including PTFE (polytetrafluoroethylene). The first fine powder P1 may, but is not limited to, a mixture of the active material, conductive material, and binder using a variety of known mixing methods, and then fibrillation of the mixture into a fibrillated dry powder using a variety of known fibrillation methods.

[0037] The first feeder 100 may include a variety of known storage means for storing the first fine powder P1, and a variety of known discharge 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 calendered onto the first freestanding film F1.

[0038] The first roller 200 includes a plurality of first rollers 200. The plurality of first rollers 200 carender the first fine powder P1 supplied from the first feeder 100 onto the first freestanding 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 carendered onto the first freestanding film F1. As an example, the plurality of first rollers 200 can roll and stretch the first fine powder P1 to carender onto the first freestanding film F1, but are not limited to this. Each of the plurality of first rollers 200 can rotate at the same angular velocity as the plurality of first rollers 200, but are not limited to this. Each of the plurality of first rollers 200 can rotate at a gradually faster angular velocity or a gradually slower angular velocity as it moves toward the first direction in which the current collector 10 is located. Among the multiple first rollers 200, the first laminating roller 300 is located adjacent to the first roller 200 that is located at the rearmost end in the first direction.

[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 freestanding film F1, which has been calendered by the plurality of first rollers 200, onto one surface of the current collector 10. The first laminating roller 300 may include, but is not limited to, a variety of known 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 may include, but is not limited to, the horizontal direction. The other direction may 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 comprises a variety of known active materials, conductive materials, and binders. The second fine powder P2 may, but is not limited to, a metal oxide system, a conductive material including carbon black, and a binder including PTFE (polytetrafluoroethylene). The second fine powder P2 may, but is not limited to, a mixture of the active material, conductive material, and binder using a variety of known mixing methods, and then fibrillated into a dry powder using a variety of known fibrillation methods.

[0042] The second feeder 400 may include a variety of known storage means for storing the second fine powder P2, and a variety of known discharge 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 calendered onto the second freestanding film F2.

[0043] The second roller 500 includes a plurality of second rollers 500. The plurality of second rollers 500 carender the second fine powder P2 supplied from the second feeder 400 onto the second freestanding 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 carendered onto the second freestanding film F2. For example, the plurality of second rollers 500 can roll and stretch the second fine powder P2 to carender onto the second freestanding film F2, but are not limited to this. Each of the plurality of second rollers 500 can rotate at the same angular velocity as the plurality of second rollers 500 move toward the second direction in which the current collector 10 is located, or it can rotate at a gradually increasing angular velocity, or it can rotate at a gradually decreasing angular velocity. Among the multiple second rollers 500, the second laminating roller 600 is located adjacent to the second roller 500 that is located at the rearmost end in the second direction.

[0044] The second laminating roller 600 is positioned between the multiple second rollers 500 and the first laminating roller 300. The second laminating roller 600 laminates the second freestanding film F2, which has been color-laminated by the multiple second rollers 500, to the other side of the current collector 10. The second laminating roller 600 may include, but is not limited to, a variety of known laminating means. The current collector 10 can move between the second laminating roller 600 and the first laminating roller 300 in a first direction and in other directions intersecting the second direction.

[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 may include various known supplying 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 the current collector 10.

[0046] The rewind roll 800 rewinds the current collector 10 laminated with the first freestanding film F1 and the second freestanding film F2. The rewind roll 800 may include a variety of known rewinding means for rewinding the current collector 10 laminated with the first freestanding film F1 and the second freestanding 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 from the first feeder 100 and the supply timing of the second fine powder P2 from the second feeder 400. The control unit 900 can include a variety of control means.

[0048] Figure 2 is a side view showing the current collector shown in part A of Figure 1 with the first freestanding film and the second freestanding film laminated to it. Figure 3 is a top view showing the current collector with the first freestanding film laminated to it by a dry electrode manufacturing apparatus according to one embodiment.

[0049] As an example, referring to Figures 1 to 3, the control unit 900 controls the supply timing of the first fine powder P1 from 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 a plurality of first rollers 200. The plurality of first rollers 200 calender the intermittently supplied first fine powder P1 onto a plurality of first freestanding films F1 spaced apart from each other. The first laminating roller 300 intermittently laminates each of the plurality of first freestanding films F1, spaced apart from each other by the plurality of first rollers 200, onto one surface 11 of the current collector 10. The control unit 900 controls the supply timing of the first fine powder P1 from the first feeder 100, thereby intermittently supplying the first fine powder P1 to a plurality of first rollers 200. The plurality of first rollers 200 then carafe the plurality of first freestanding films F1 that are spaced apart from each other. The first laminating roller 300 then intermittently laminates each of the plurality of first freestanding films F1 onto one surface 11 of the current collector 10. As a result, the first freestanding film F1 coats the coated portion A2 of the current collector 10 shown in Figures 2 and 3, but not the plain portion A1 of the current collector 10. Therefore, a dry electrode can be manufactured that includes a coated portion A2 coated with electrode active material and a plain portion A1 that is not coated with electrode active material.

[0050] The control unit 900 controls the supply timing of 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, intermittently supplies the second fine powder P2 to a plurality of second rollers 500. The plurality of second rollers 500 color the intermittently supplied second fine powder P2 onto a plurality of second freestanding films F2 spaced apart from each other. The second laminating roller 600 intermittently laminates each of the plurality of second freestanding films F2, spaced apart from each other by the plurality of second rollers 500, onto the other side 12 of the current collector 10. The control unit 900 controls the supply timing of the second fine powder P2 from the second feeder 400, thereby intermittently supplying the second fine powder P2 to multiple second rollers 500. Multiple second freestanding films F2, spaced apart from each other, are carved by the multiple second rollers 500. Each of the multiple second freestanding films F2 is then intermittently laminated to the other surface 12 of the current collector 10 by the second laminating roller 600. As a result, the second freestanding film F2 coats the coated portion A2 of the current collector 10 shown in Figure 2, while the second freestanding film F2 does not coat the plain portion A1 of the current collector 10. Therefore, a dry electrode can be manufactured that includes a coated portion A2 coated with electrode active material and a plain portion A1 not coated with electrode active material.

[0051] As another example, the control unit 900 can synchronize the supply timing of the first fine powder P1 from the first feeder 100 and the supply timing of the second fine powder P2 from the second feeder 400 so that the multiple first freestanding films F1 and the multiple second freestanding films F2 laminated to one surface 11 and the other surface 12 of the current collector 10 are superimposed horizontally in Figure 2.

[0052] As another example, the control unit 900 can synchronize the supply timing of the first fine powder P1 from the first feeder 100 and the supply timing of the second fine powder P2 from the second feeder 400 so that the multiple first freestanding films F1 and the multiple second freestanding films F2 laminated to one surface 11 and the other surface 12 of the current collector 10 do not overlap horizontally in Figure 2.

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

[0054] The first suction unit 910 is adjacent to the first feeder 100 and intermittently sucks in the first fine powder P1 discharged from the first feeder 100. By intermittently sucking in the first fine powder P1 discharged from the first feeder 100 by the first suction unit 910, the control unit 900 controls the supply timing of the first fine powder P1 from 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 multiple first rollers 200. The first suction unit 910 can, but is not limited to, be located within the movement path of the first fine powder P1 supplied by the first feeder 100. The first suction unit 910 is connected to the first feeder 100. The first suction unit 910 resupplies the first fine powder P1 sucked in from the first feeder 100 to the first feeder 100. As an example, the first suction unit 910 may include a variety of known suction and transfer means.

[0055] The first sensor 920 is located on a plurality of first rollers 200. The first sensor 920 detects the spacing between a plurality of first freestanding films F1 that are separated from each other and rendered by the plurality of first rollers 200. The control unit 900 can control the intermittent suction timing of the first fine powder P1 by the first suction unit 910 based on the spacing between the plurality of first freestanding films F1 detected by the first sensor 920. The first sensor 920 may include a variety of known detection means such as vision and laser beams. The control unit 900 controls the intermittent suction timing of the first fine powder P1 by the first suction unit 910 based on the spacing between the multiple first freestanding films F1 detected by the first sensor 920. This controls the supply timing of the first fine powder P1 by the first feeder 100 based on the spacing between the multiple first freestanding films F1, thereby controlling the spacing between the multiple first freestanding films F1. As a result, the spacing between the multiple first freestanding films F1 intermittently laminated onto one surface 11 of the current collector 10 is controlled, and the length of the coated portion A2 coated with the first freestanding films F1 and the spacing of the uncoated portion A1 are controlled.

[0056] The second suction unit 930 is adjacent to the second feeder 400 and intermittently sucks in the second fine powder P2 discharged from the second feeder 400. By intermittently sucking in the second fine powder P2 discharged from the second feeder 400 by the second suction unit 930, the supply timing of the second fine powder P2 from 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 multiple second rollers 500. The second suction unit 930 can, but is not limited to, be located within the movement path of the second fine powder P2 supplied by the second feeder 400. The second suction unit 930 is connected to the second feeder 400. The second suction unit 930 resupplies the second fine powder P2 sucked in from the second feeder 400 to the second feeder 400. As an example, the second suction section 930 may include a variety of known suction and transfer means.

[0057] The second sensor 940 is located on a plurality of second rollers 500. The second sensor 940 detects the spacing between a plurality of second freestanding films F2 that are separated from each other and rendered by the plurality of second rollers 500. Based on the spacing between the plurality of second freestanding films F2 detected by the second sensor 940, the control unit 900 can control the intermittent suction timing of the second fine powder P2 by the second suction unit 930. The second sensor 940 may include a variety of known detection means such as vision and laser beams. The control unit 900 controls the intermittent suction timing of the second fine powder P2 by the second suction unit 930 based on the spacing between the multiple second freestanding films F2 detected by the second sensor 940. This controls the supply timing of the second fine powder P2 by the second feeder 400 based on the spacing between the multiple second freestanding films F2, thereby controlling the spacing between the multiple second freestanding films F2. As a result, the spacing between the multiple second freestanding films F2 intermittently laminated onto one surface 11 of the current collector 10 is controlled, and the length of the coated portion A2 coated with the second freestanding films F2 and the spacing of the plain portion A1 not coated with the second freestanding films F2 can be controlled in the current collector 10 coated with the multiple second freestanding films F2.

[0058] As an example, a dry electrode manufacturing apparatus is provided that manufactures a dry electrode including a blank area A1 by intermittently laminating a first freestanding film F1 and a second freestanding film F2 onto a current collector 10.

[0059] The following describes a dry electrode manufacturing apparatus according to another embodiment, with reference to Figures 4 and 5. The following describes the differences from the dry electrode manufacturing apparatus according to the one embodiment described above.

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

[0061] Referring to Figure 4, another embodiment of the dry electrode manufacturing apparatus 1000 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 rewind 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 from the first feeder 100 and the supply timing of the second fine powder P2 from the second feeder 400. The control unit 900 can include a variety of 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 to this.

[0064] Figure 5 is a side view showing the current collector shown in section B of Figure 4, laminated with the first freestanding film and the second freestanding film.

[0065] Referring to Figures 4 and 5, the control unit 900 controls the supply timing of the first fine powder P1 from 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 a plurality of first rollers 200. The plurality of first rollers 200 calender the intermittently supplied first fine powder P1 onto a plurality of first freestanding films F1 spaced apart from each other. The first laminating roller 300 intermittently laminates each of the plurality of first freestanding films F1, spaced apart from each other by the plurality of first rollers 200, onto one surface 11 of the current collector 10. The control unit 900 controls the supply timing of the first fine powder P1 from the first feeder 100, thereby intermittently supplying the first fine powder P1 to a plurality of first rollers 200. The plurality of first rollers 200 then carafe the plurality of first freestanding films F1 that are spaced apart from each other. The first laminating roller 300 then intermittently laminates each of the plurality of first freestanding films F1 onto one surface 11 of the current collector 10. As a result, the first freestanding film F1 coats the coated portion A2 of the current collector 10 shown in Figure 5, but not the plain portion A1 of the current collector 10. Therefore, a dry electrode can be manufactured that includes a coated portion A2 coated with electrode active material and a plain portion A1 that is not coated with electrode active material.

[0066] The control unit 900 controls the supply timing of 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, intermittently supplies the second fine powder P2 to a plurality of second rollers 500. The plurality of second rollers 500 color the intermittently supplied second fine powder P2 onto a plurality of second freestanding films F2 spaced apart from each other. The second laminating roller 600 intermittently laminates each of the plurality of second freestanding films F2, spaced apart from each other by the plurality of second rollers 500, onto the other side 12 of the current collector 10. The control unit 900 controls the supply timing of the second fine powder P2 from the second feeder 400, thereby intermittently supplying the second fine powder P2 to multiple second rollers 500. Multiple second freestanding films F2, spaced apart from each other, are carazed by the multiple second rollers 500. Each of the multiple second freestanding films F2 is then intermittently laminated to the other surface 12 of the current collector 10 by the second laminating roller 600. As a result, the second freestanding film F2 coats the coated portion A2 of the current collector 10 shown in Figure 5, while the second freestanding film F2 does not coat the plain portion A1 of the current collector 10. Therefore, a dry electrode can be manufactured that includes a coated portion A2 coated with electrode active material and a plain portion A1 not coated with electrode active material.

[0067] As another example, the control unit 900 can synchronize the supply timing of the first fine powder P1 from the first feeder 100 and the supply timing of the second fine powder P2 from the second feeder 400 so that the multiple first freestanding films F1 and the multiple second freestanding films F2 laminated to one surface 11 and the other surface 12 of the current collector 10 are superimposed horizontally in Figure 5.

[0068] As another example, the control unit 900 can synchronize the supply timing of the first fine powder P1 from the first feeder 100 and the supply timing of the second fine powder P2 from the second feeder 400 so that the multiple first freestanding films F1 and the multiple second freestanding films F2 laminated to one surface 11 and the other surface 12 of the current collector 10 do not overlap horizontally in Figure 5.

[0069] As an example, a dry electrode manufacturing apparatus is provided that manufactures a dry electrode including a blank area A1 by intermittently laminating a first freestanding film F1 and a second freestanding film F2 onto a current collector 10.

[0070] The following describes a dry electrode manufacturing method according to another embodiment with reference to Figure 6. The dry electrode manufacturing method according to the other embodiment can be carried out using the dry electrode manufacturing apparatus according to the above-described embodiment or the dry electrode manufacturing apparatus according to another embodiment, but is not limited thereto.

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

[0072] Next, referring to Figure 6, the first fine powder is calendered onto the first freestanding film (S100).

[0073] Specifically, the first fine powder is calendered onto the first freestanding film using a variety of known calendering methods, such as calendering rollers.

[0074] Next, the first freestanding film is laminated onto one surface of the current collector (S200).

[0075] Specifically, the first freestanding film is laminated to one surface of the current collector using various known laminating methods such as laminating rollers.

[0076] Next, the second fine powder is calendered onto the second freestanding film (S300).

[0077] Specifically, the second fine powder is calendered onto the second freestanding film using a variety of known calendering methods, such as calendering rollers.

[0078] Next, the second freestanding film is laminated to the other side of the current collector (S400).

[0079] Specifically, a second freestanding film is laminated to the other side of the current collector using various known laminating methods such as laminating rollers. Control the supply timing of the first fine powder (S500).

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

[0081] Each of the multiple first freestanding 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 supplied intermittently, the multiple first freestanding films, spaced apart from each other, are colored, and each of the multiple first freestanding films is intermittently laminated onto one surface of the current collector. As a result, the first freestanding films are coated onto the coated portion of the current collector, but not onto the plain portion of the current collector. Therefore, a dry electrode can be manufactured that includes a coated portion coated with electrode active material and a plain portion not coated with electrode active material.

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

[0083] Specifically, by controlling the supply timing of the second fine powder using various known control means and supplying the second fine powder intermittently, the intermittently supplied second fine powder is calendered onto a plurality of second freestanding films spaced apart from each other.

[0084] Each of the multiple second freestanding films, spaced apart from each other, is intermittently laminated to the other surface of the current collector. By controlling the supply timing of the second fine powder, the second fine powder is supplied intermittently, the multiple second freestanding films, spaced apart from each other, are colored, and each of the multiple second freestanding films is intermittently laminated to the other surface of the current collector. As a result, the second freestanding film coats the coated portion of the current collector, but not the plain portion of the current collector. Therefore, a dry electrode can be manufactured that includes a coated portion coated with electrode active material and a plain portion not coated with electrode active material.

[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, the multiple first freestanding films and the multiple second freestanding films laminated to one side and the other side of the current collector can be superimposed on 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, it is possible to prevent the multiple first freestanding films and multiple second freestanding films laminated to one side and the other side of the current collector from overlapping each other in the thickness direction of the current collector.

[0087] As an example, a dry electrode manufacturing method is provided for manufacturing a dry electrode including a plain area by intermittently laminating a first freestanding film and a second freestanding film onto a current collector.

[0088] Although embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto. Various modifications and improvements made by those skilled in the art, utilizing the basic concepts of the present invention as defined in the following claims, also fall within the scope of the present invention. [Explanation of Symbols]

[0089] 100 First Feeder 200 First Roller 300 First Laminating Roller 900 Control Unit

Claims

1. A first feeder that supplies the first fine powder; A plurality of first rollers for calendering the first fine powder supplied from the first feeder onto a first freestanding film; A first laminating roller adjacent to the plurality of first rollers, for laminating the first freestanding film onto one surface of the current collector; and A control unit connected to the first feeder controls the supply timing of the first fine powder from the first feeder. Includes, The first feeder, whose supply timing is controlled by the control unit, intermittently supplies the first fine powder to the plurality of first rollers. The plurality of first rollers are a dry electrode manufacturing apparatus that calenders the first fine powder onto a plurality of first freestanding films spaced apart from each other.

2. The dry electrode manufacturing apparatus according to claim 1, wherein the first laminating roller intermittently laminates each of the plurality of first freestanding films onto one surface of the current collector.

3. The control unit, The dry electrode manufacturing apparatus according to claim 1, comprising a first suction unit adjacent to the first feeder and intermittently sucking in the first fine powder discharged from the first feeder.

4. The dry electrode manufacturing apparatus according to claim 3, wherein the first suction unit is connected to the first feeder and resupplies the first fine powder suctioned from the first feeder to the first feeder.

5. The control unit, The dry electrode manufacturing apparatus according to claim 3, further comprising a first sensor located on the plurality of first rollers for detecting the spacing between the plurality of first freestanding films that are spaced apart from each other.

6. The dry electrode manufacturing apparatus according to claim 5, wherein the control unit controls the intermittent inhalation timing of the first fine powder by the first inhalation unit based on the interval between the plurality of first freestanding films detected by the first sensor.

7. A second feeder supplying the second fine powder; A plurality of second rollers for calendering the second fine powder supplied from the second feeder onto a second freestanding film; and A second laminating roller located between the plurality of second rollers and the first laminating roller, which laminates the second freestanding film to the other side of the current collector. It further includes, The dry electrode manufacturing apparatus according to claim 1, wherein the control unit is connected to the second feeder and controls the supply timing of the second fine powder from the second feeder.

8. The second feeder, whose supply timing is controlled by the control unit, intermittently supplies the second fine powder to the plurality of second rollers. The dry electrode manufacturing apparatus according to claim 7, wherein the plurality of second rollers calender the second fine powder onto a plurality of second freestanding films spaced apart from each other.

9. The dry electrode manufacturing apparatus according to claim 8, wherein the second laminating roller intermittently laminates each of the plurality of second freestanding films to the other surface of the current collector.

10. The control unit, The dry electrode manufacturing apparatus according to claim 7, further comprising a second suction unit adjacent to the second feeder, which intermittently suctions the second fine powder discharged from the second feeder.

11. The dry electrode manufacturing apparatus according to claim 10, wherein the second suction unit is connected to the second feeder and resupplies the second fine powder suctioned from the second feeder to the second feeder.

12. The control unit, The dry electrode manufacturing apparatus according to claim 10, further comprising a second sensor located on the plurality of second rollers for detecting the spacing between the plurality of second freestanding films that are spaced apart from each other.

13. The dry electrode manufacturing apparatus according to claim 12, wherein the control unit controls the intermittent inhalation timing of the second fine powder by the second inhalation unit based on the interval between the plurality of second freestanding films detected by the second sensor.

14. A source roll that supplies the current collector between the first laminating roller and the second laminating roller; and The unwinding roll unwinds the current collector to which the first freestanding film and the second freestanding film are laminated. The dry electrode manufacturing apparatus according to claim 7, further comprising:

15. Steps include: calendering the first fine powder onto the first freestanding film; The steps of laminating the first freestanding film onto one surface of the current collector; and Step of controlling the supply timing of the first fine powder. Includes, The step of controlling the supply timing of the first fine powder includes the step of supplying the first fine powder intermittently. A dry electrode manufacturing method comprising the step of calendering the first fine powder onto a first freestanding film, wherein the first fine powder supplied intermittently is calendered onto a plurality of first freestanding films spaced apart from each other.

16. The dry electrode manufacturing method according to claim 15, wherein the step of laminating the first freestanding film to one surface of the current collector includes the step of intermittently laminating each of the plurality of first freestanding films to one surface of the current collector.

17. Step 1: Calendering the second fine powder onto the second freestanding film; The steps of laminating the second freestanding film to the other side of the current collector; and Steps to control the supply timing of the second fine powder. The dry electrode manufacturing method according to claim 15, further comprising:

18. The dry electrode manufacturing method according to claim 17, wherein the steps of controlling the supply timing of the first fine powder and controlling the supply timing of the second fine powder are performed simultaneously.

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