A separator transfer device

Abstract

The present invention relates to a membrane transfer device capable of preventing contact between the expansion roll and the membrane when the membrane transfer device stops, thereby preventing marks on the membrane caused by the expansion roll and improving wrinkles in the membrane. A plurality of transfer rolls for transferring a separator; an expander roll spaced apart from the transfer rolls and contacting one surface of the separator to prevent wrinkles from forming on the separator; and a mark prevention member disposed on one side or the other side of the expander roll and configured to selectively press one surface or the other surface of the separator; comprising The above-mentioned mark prevention member can move the separator so that the separator is separated from the expansion roll when the operation of the transfer roll is stopped, and can move the separator so that the separator and the expansion roll come into contact when the transfer roll is operated.

Description

Technology Field

[0001] The present invention relates to a membrane transfer device. More specifically, it relates to a membrane transfer device including an expansion roll. Background Technology

[0002] Recently, interest in energy storage technology has been steadily increasing. As application fields expand to include mobile phones, camcorders, laptop PCs, and even electric vehicles, there is a growing demand for higher energy density in batteries used as power sources for these electronic devices. Lithium-ion batteries are the best candidates to meet these demands, and active research is currently underway in this area.

[0003] These lithium secondary batteries consist of a positive electrode, a negative electrode, a separator, and an electrolyte; among these components, the separator serves as an insulator between the positive and negative electrodes. During the process of transporting these separators, there is a tendency for wrinkles to form. These wrinkles not only degrade processability in subsequent stages but also pose a problem by causing defective products. To prevent such wrinkling, separator transport devices equipped with expander rolls are widely used.

[0004] FIG. 1 is a schematic diagram showing a conventional membrane transfer device equipped with an expansion roll.

[0005] Referring to FIG. 1, the separator (100) passes through the expansion roll (200) and is then transferred to a subsequent process step by the transfer roll (300).

[0006] However, when the membrane transfer device stops due to a problem or for reasons such as replacing materials, the expansion roll (200) and the membrane (100) remain in contact, and there is a problem in that marks caused by the expansion roll (200) remain on the membrane (100). The problem to be solved

[0007] Therefore, the problem that the present invention aims to solve is to provide a membrane transfer device capable of preventing marks on the membrane caused by the expansion roll when the membrane transfer device stops. means of solving the problem

[0008] In order to solve the above problem, according to one aspect of the present invention, a membrane transfer device of the following embodiments is provided.

[0009] The first embodiment is,

[0010] Multiple transfer rolls for transferring the separation membrane;

[0011] An expander roll positioned spaced apart from the transfer roll and in contact with one surface of the separator to prevent wrinkles from forming on the separator; and

[0012] A mark prevention member disposed on one side or the other side of the expansion roll and configured to selectively press one side or the other side of the separator; comprising

[0013] The above-mentioned mark prevention member moves the separator so that the separator is separated from the expansion roll when the operation of the above-mentioned transfer roll is stopped, and

[0014] The present invention relates to a membrane transfer device characterized by moving the membrane so that the membrane and the expansion roll come into contact when the transfer roll is operated.

[0015] The second embodiment is, in the first embodiment,

[0016] The above-mentioned mark prevention member may be movable up, down, left, and right.

[0017] The third embodiment is, in the first embodiment or the second embodiment,

[0018] When the operation of the transfer roll is stopped, the above-mentioned mark prevention member can move the separator upward so that the separator is separated from the expansion roll while the upper end of the expansion roll contacts one surface of the separator.

[0019] When the above transfer roll is operated, the separator can be moved downward so that the separator and the expansion roll come into contact.

[0020] The fourth embodiment is, in the third embodiment,

[0021] The mark prevention member can be moved upward so that the upper end of the mark prevention member in the highest state is positioned higher than the upper end of the expansion roll.

[0022] The fifth embodiment is, in the third embodiment or the fourth embodiment,

[0023] The mark prevention member can be moved downward so that the upper end of the mark prevention member in its lowest lowered state does not come into contact with the separator being transported.

[0024] The sixth embodiment is, in any one of the first to fifth embodiments,

[0025] When the above transfer roll is operated, the end of the mark prevention member may not come into contact with the separator being transferred.

[0026] The seventh embodiment is, in any one of the first to sixth embodiments,

[0027] The above-mentioned mark prevention member is,

[0028] A sensor unit for detecting whether the above transfer roll is operating;

[0029] A driving unit for changing the position of the above-mentioned mark prevention member; and

[0030] It may include a separator mounting section.

[0031] The eighth embodiment is, in the seventh embodiment,

[0032] The sensor unit can detect whether the transfer roll is operating by detecting the deceleration or acceleration of the transfer roll.

[0033] The ninth embodiment is, in the seventh embodiment or the eighth embodiment,

[0034] The above driving unit may be equipped with a cylinder or a screw part. Effects of the invention

[0035] A membrane conveying device according to one embodiment of the present invention can prevent the membrane and the expansion roll from coming into contact with each other by using a mark prevention member when the membrane conveying device stops, thereby preventing marks caused by the expansion roll from forming on the membrane. Brief explanation of the drawing

[0036] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the aforementioned description; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a schematic diagram showing a conventional membrane transfer device equipped with an expansion roll. FIG. 2 is a schematic diagram showing a membrane transfer device according to one embodiment of the present invention. FIG. 3 is an enlarged view of part A of FIG. 2 in one embodiment of the present invention. FIG. 4 is an enlarged view of portion A of FIG. 2 in another embodiment of the present invention. Figure 5 is a figure showing the case where the membrane transfer device stops. Figure 6 is a figure showing the case where the membrane transfer device stops and then restarts. Specific details for implementing the invention

[0037] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0038] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0040] A membrane transfer device according to one embodiment of the present invention comprises a plurality of transfer rollers for transferring a membrane;

[0041] An expander roll positioned spaced apart from the transfer roll and contacting one side of the separator to prevent wrinkles from forming on the separator; and a mark prevention member positioned on one side or the other of the expander roll and configured to selectively press one side or the other side of the separator; comprising

[0042] The above-mentioned mark prevention member is characterized by moving the separator so that the separator is separated from the expansion roll when the operation of the transfer roll is stopped, and moving the separator so that the separator and the expansion roll come into contact when the transfer roll is operated.

[0044] FIG. 2 is a schematic diagram showing a membrane transfer device according to one embodiment of the present invention.

[0045] Referring to FIG. 2, a membrane transfer device according to one embodiment of the present invention comprises an unwinder (10) for continuously supplying a membrane (100), an Edge Point Controller (EPC) (20) that enables normal driving by preventing uneven driving in the driving direction, an expander roller (200) that prevents wrinkles from forming on the membrane (100), and a plurality of transfer rollers (300) for transferring the membrane (100).

[0046] The above unwinder (10) may be equipped with a supply roll for continuously supplying the separator (100) and unwinds and supplies the separator (100) in a wound state.

[0047] The above unwinder (10) can supply the separator (100) by rotating at an operating speed of 120 to 150 m / min.

[0048] The above unwinder (10) can be driven by a geared motor in a 2-axis turret automatic switching method to increase the operational efficiency of the separator (100) supply. In addition, the separator (100) supply operation can be performed by driving through electric drive by a servo motor. In addition, it can be equipped with upper and lower automatic splicing units having a traverse cutting function.

[0049] The above EPC (20) senses the edge position of the separator (100) supplied through the above unwinder (10) when transporting the separator, thereby preventing uneven movement in the driving direction and enabling normal driving.

[0050] The above EPC (20) may include a plurality of transfer rolls (300) for tension control, etc., when transferring the separator (100).

[0051] The above expansion roll (200) serves to flatten wrinkles formed on the separator (100) during the process. The separator (100) can be transported with the wrinkles formed on the separator (100) flattened by the above expansion roll (200).

[0052] If the above expansion roll (200) is installed after the above EPC (20), it is possible to prevent the driving position of the separator (100) from changing.

[0053] The above transfer roll (300) serves to transfer the separator (100). For example, the separator (100) can be supplied to a process step in which electrodes and lamination are performed by the above transfer roll (300). In one embodiment of the present invention, the above transfer roll (300) is located behind the expansion roll (200) so as to transfer the separator (100) that has passed through the expansion roll (200) to the next process step.

[0054] In one embodiment of the present invention, the transfer roll (300) is positioned in front of the expansion roll (200) to transfer the separator (100) to the expansion roll (200).

[0055] In one embodiment of the present invention, the transfer roll (300) may be located at both the front and rear of the expansion roll (200).

[0056] Here, "forward" means a case where, based on the expansion roll (200), it is located in a direction opposite to the direction of movement of the separator (100) compared to the expansion roll (200). Also, "rear" means a case where, based on the expansion roll (200), it is located in a direction opposite to the direction of movement of the separator (100) compared to the expansion roll (200).

[0057] In one embodiment of the present invention, the transfer roll (300) may include a transfer roll body for transferring a separator (100) and a transfer roll axis configured to allow the transfer roll (300) to rotate.

[0059] FIG. 3 is an enlarged view of part A of FIG. 2 in one embodiment of the present invention.

[0060] Referring to FIG. 3, a membrane transfer device according to one embodiment of the present invention comprises a mark prevention member (400).

[0062] The membrane transfer device may stop when there is a defect in the device or when materials within the device are being replaced. Conventionally, when the membrane transfer device stops for the reasons mentioned above, the membrane (100) remains in contact with the expansion roll (200), and there were cases where marks from the expansion roll (200) were left on the membrane (100).

[0063] In the present invention, a mark prevention member (400) is provided on one side or the other side of the expansion roll (200) so that when the membrane conveying device stops, direct contact between the expansion roll (200) and the membrane (100) can be prevented.

[0064] The above-mentioned mark prevention member (400) can prevent the separation membrane (100) and the expansion roll (200) from coming into direct contact by moving the separation membrane (100) so that the separation membrane (100) is separated from the expansion roll (200) when the operation of the separation membrane transfer device is stopped, that is, when the operation of the transfer roll (300) is stopped.

[0065] Next, when the membrane transfer device is restarted, the membrane (100) is moved so that the membrane (100) and the expansion roll (200) come into contact.

[0066] The mark prevention member (400) is positioned on one side or the other side of the expansion roll (200) and can selectively press one side or the other side of the separator (100). The mark prevention member (400) can move the separator (100) while selectively pressing one side or the other side of the separator, thereby preventing direct contact between the separator (100) and the expansion roll (200).

[0067] In one embodiment of the present invention, the mark prevention member (400) may be movable up, down, left, and right. As the mark prevention member (400) moves up, down, left, and right, the separator (100) can be moved, thereby preventing direct contact between the separator (100) and the expansion roll (200).

[0068] For example, the mark prevention member (400) can move upward or downward to move the separator (100), thereby preventing the separator (100) and the expansion roll (200) from coming into direct contact.

[0069] In one embodiment of the present invention, the mark prevention member (400) may be provided in two or more places and positioned on both sides of the expansion roll (200). This is illustrated in FIG. 4.

[0070] FIG. 4 is a diagram showing the case where the membrane transfer device operates normally. Referring to FIG. 4, the membrane transfer device according to one embodiment of the present invention may have a first mark prevention member (400A) located on one side of the expansion roll (200) and a second mark prevention member (400B) located on the other side of the expansion roll (200).

[0071] Referring to FIG. 4, when the membrane transfer device is operating normally, that is, when the transfer roller (300) is operating, the mark prevention member (400) can be positioned so that the end of the mark prevention member (400) does not come into contact with the membrane (100) being transferred. In this case, the end of the mark prevention member (400) does not come into contact with the membrane (100) being transferred, so the transfer of the membrane (100) may not be obstructed.

[0072] In one embodiment of the present invention, when the membrane transfer device is operating normally, the mark prevention member (400) may be positioned so that the upper end of the mark prevention member (400) does not come into contact with the membrane (100) being transferred.

[0073] In another embodiment of the present invention, when the membrane transfer device is operating normally, the mark prevention member (400) may be positioned so that the lower end of the mark prevention member (400) does not come into contact with the membrane (100) being transferred.

[0075] In one embodiment of the present invention, the mark prevention member (400) may include a sensor unit that detects whether the separator transfer device is operating; a driving unit that changes the position of the mark prevention member (400); and a separator mounting unit.

[0076] When the membrane transfer device stops, the operating membrane transfer device may gradually begin to decelerate until it finally comes to a complete stop. For example, the motor operating the membrane transfer device may gradually decelerate and then stop, eventually causing the membrane transfer device to come to a complete stop.

[0077] In addition, when the membrane transfer device resumes operation after stopping, the stopped device may gradually accelerate until it eventually returns to a normal operating state. For example, the motor operating the membrane transfer device may gradually accelerate and eventually reach the speed required for normal operation.

[0078] The sensor unit described above can detect whether the membrane transfer device is operating. Specifically, it can detect whether the membrane transfer device is in a stopped state or in an operating state. More specifically, it can detect whether the membrane transfer device is in a stopped state or in a state where it is starting operation.

[0079] In one embodiment of the present invention, the sensor unit can determine whether the membrane transfer device is operating by detecting whether the membrane transfer device is decelerating or accelerating. For example, by detecting the deceleration or acceleration state of the motor operating the membrane transfer device, it can detect whether the membrane transfer device is in a stopped state or is about to start operating.

[0080] In one embodiment of the present invention, the sensor unit transmits a signal detected by the sensor regarding whether the separator transfer device is operating to the driving unit, and accordingly, the driving unit moves the mark prevention member (400) to control whether there is contact between the separator (100) and the expansion roll (200).

[0081] The above driving unit serves to change the position of the mark prevention member (400). The driving unit is not particularly limited as long as it is capable of moving the mark prevention member (400).

[0082] In one embodiment of the present invention, the driving unit may use a hydraulic cylinder having advantages such as being able to exert a large force in a compact size, being remotely controllable, operating accurately, and capable of stepless speed control, or a pneumatic cylinder having advantages such as being able to easily obtain an energy source, having simple power transmission, easy output adjustment, and simple control.

[0083] In another embodiment of the present invention, the driving unit may be provided with a screw unit. The screw unit allows the mark prevention member (400) to move by rotating the screw. For example, the mark prevention member (400) may move upward as the screw is rotated clockwise, and the mark prevention member (400) may move downward as the screw is rotated counterclockwise.

[0084] The above-mentioned separator mounting portion is the part where the mark prevention member (400) comes into direct contact with the separator (100). The shape of the above-mentioned separator mounting portion is not particularly limited as long as it does not cause damage or marks to the separator. For example, the separator mounting portion may include a roller, so that the roller can come into direct contact with the separator (100). The roller may include a roller body that comes into direct contact with the separator (100) and a roller shaft configured to allow the roller to rotate.

[0086] Figure 5 illustrates the case where the membrane transfer device stops.

[0087] Referring to FIG. 5, when the membrane transfer device begins to stop, the mark prevention member (400) can move upward. When the membrane transfer device completely stops, the mark prevention member (400) can be in the highest position.

[0088] Referring to FIG. 5, the mark prevention member (400) can be moved upward so that its upper end in the uppermost state is positioned higher than the upper end of the expansion roll (200). Accordingly, the separator (100) comes into contact with the mark prevention member (400) rather than the expansion roll (200), thereby preventing the separator (100) from coming into contact with the expansion roll (200).

[0089] The height difference (△H) between the upper end of the mark prevention member (400) in its highest state and the upper end of the expansion roll (200) is not significantly limited if it is set to a level where the end of the expansion roll (200) does not come into contact with the separator (100). Due to this height difference between the upper end of the mark prevention member (400) and the upper end of the expansion roll (200), the separator (100) may not come into contact with the upper end of the expansion roll (200).

[0090] Although not illustrated in FIG. 5, in another embodiment of the present invention, when the membrane conveying device begins to stop, the mark prevention member (400) may move downward. The mark prevention member (400) may be in its lowest state when the membrane conveying device has completely stopped.

[0091] Referring to FIG. 5, the mark prevention member (400) can be moved downward so that its lower end in the lowest state is positioned lower than the lower end of the expansion roll (200). Accordingly, the separator (100) comes into contact with the mark prevention member (400) rather than the expansion roll (200), thereby preventing the separator (100) from coming into contact with the expansion roll (200).

[0092] The height difference between the lower end of the mark prevention member (400) in its lowest lowered state and the lower end of the expansion roll (200) is not significantly limited if it is set to a level where the end of the expansion roll (200) does not come into contact with the separator (100). Due to this height difference between the lower end of the mark prevention member (400) and the lower end of the expansion roll (200), the separator (100) may not come into contact with the lower end of the expansion roll (200).

[0094] Figure 6 illustrates the case where the membrane transfer device stops and then restarts.

[0095] Referring to FIG. 6, when the membrane transfer device stops and then starts operating again, the mark prevention member (400) can move downward. The mark prevention member (400) can be lowered to the lowest state when the membrane transfer device is in a fully operational state.

[0096] Referring to FIG. 6, the mark prevention member (400) can be moved downward so that its upper end in the lowest state does not come into contact with the separator (100) being transported. As the mark prevention member (400) moves downward, the expansion roll (200) can come into contact with the separator (100) again, and when the separator transport device is operated normally again, the expansion roll (200) can flatten the wrinkles present in the separator (100).

[0097] Although not illustrated in FIG. 6, in another embodiment of the present invention, when the membrane transfer device stops and then starts operating again, the mark prevention member (400) may move upward. The mark prevention member (400) may be in a top position when the membrane transfer device is in a fully operational state.

[0098] Referring to FIG. 6, the mark prevention member (400) can be moved upward so that the lower end of the uppermost state does not come into contact with the separator (100) being transported. As the mark prevention member (400) moves upward, the expansion roll (200) can come into contact with the separator (100) again, and when the separator transport device is operated normally again, the expansion roll (200) can flatten the wrinkles present in the separator (100).

[0100] In one embodiment of the present invention, the gap between the mark prevention member (400) and the expansion roll (200) is not significantly limited as long as it can be adjusted to a level that prevents the mark prevention member (400) from moving and the expansion roll (200) and the separator (100) from coming into direct contact when the separator transfer device stops.

[0102] A separator transfer device according to one embodiment of the present invention may be installed immediately before the step of laminating the electrode and the separator. At this time, the separator transfer device may be a device for supplying the separator during the process step of laminating the electrode and the separator.

[0104] Although the present invention has been described above by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs.

[0105] Furthermore, since the present invention described above allows for various substitutions, modifications, and changes within the scope of the technical concept of the present invention to those skilled in the art without departing from the technical spirit of the present invention, it is not limited by the aforementioned embodiments and attached drawings, but rather all or part of each embodiment may be selectively combined to allow for various modifications. Explanation of the symbols

[0106] 10: Unwinder 20: EPC 100: Separator 200: Expansion Roll 300: Transfer Roll 400, 400A, 400B: Anti-mark member

Claims

Claim 1 A separator transfer device comprising: a plurality of transfer rolls for transferring a separator; an expander roll disposed spaced apart from the transfer rolls and contacting one surface of the separator to prevent wrinkles from forming on the separator; and a mark prevention member disposed on one side or the other side of the expander roll and configured to selectively press one surface or the other surface of the separator; wherein the mark prevention member moves the separator so that the separator is spaced apart from the expander roll when the operation of the transfer rolls is stopped, and moves the separator so that the separator and the expander roll come into contact when the transfer rolls are operated; and wherein the mark prevention member includes a sensor unit for detecting whether the transfer rolls are operated; a driving unit for changing the position of the mark prevention member; and a separator mounting unit. Claim 2 A membrane transfer device according to claim 1, characterized in that the mark prevention member is movable up, down, left, and right. Claim 3 A membrane transfer device according to claim 1, characterized in that when the operation of the transfer roll is stopped, the upper end of the mark prevention member is brought into contact with one surface of the membrane so that the membrane is separated from the expansion roll, and when the operation of the transfer roll is stopped, the membrane is moved upward, and when the transfer roll is operated, the membrane is moved downward so that the membrane and the expansion roll come into contact. Claim 4 A membrane conveying device according to paragraph 3, characterized in that the mark prevention member moves upward so that the upper end of the mark prevention member in the highest state is positioned higher than the upper end of the expansion roll. Claim 5 A membrane transfer device characterized in that, in paragraph 3, the mark prevention member moves downward so that the upper end of the mark prevention member in the lowest lowered state does not come into contact with the membrane being transferred. Claim 6 A membrane transfer device according to claim 1, characterized in that, when the transfer roll is operated, the upper end of the mark prevention member does not come into contact with the membrane being transferred. Claim 7 delete Claim 8 A membrane transfer device according to claim 1, characterized in that the sensor unit detects the deceleration or acceleration of the transfer roll to detect whether the transfer roll is operating. Claim 9 A membrane transfer device according to claim 1, characterized in that the driving part comprises a cylinder or a screw part.

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