Fluid spraying device for drying electrode sheet and electrode sheet drying device including same

Abstract

According to example embodiments, a fluid spraying device for drying an electrode sheet is provided. The fluid spraying device for drying an electrode sheet comprises: a fluid storage tank: a plurality of flow paths connected to the fluid storage tank to be in fluid communication with the fluid storage tank; a first side nozzle coupled to one of the plurality of flow paths; a second side nozzle coupled to one of the plurality of flow paths; and at least one center nozzle coupled to one of the plurality of flow paths, wherein the first and second side nozzles and the center nozzle are configured to be movable in a first direction perpendicular to the machine direction (MD) of the electrode sheet.

Description

Fluid injection device for drying electrode sheets and electrode sheet drying device including the same

[0001] This disclosure claims the benefit of priority to Republic of Korea Patent Application No. 10-2023-0074587, filed June 12, 2023, the entire contents of which are incorporated by reference herein.

[0002] The technical idea of ​​the present invention relates to a fluid injection device for drying an electrode sheet and an electrode sheet drying device including the same.

[0003] More specifically, the technical idea of ​​the present invention relates to an electrode sheet drying fluid injection device and an electrode sheet drying device including the same, which can prevent the occurrence of wrinkles and cracks in electrode sheets by resolving the stress concentration phenomenon that appears in the non-coated portion and can be used for drying different electrode sheets having different patterns in the non-coated portion.

[0004]

[0005] The electrode can be manufactured through a coating step of coating the electrode slurry on a current collector and a drying step of removing the fluid of the electrode slurry.

[0006] During the coating step, the electrode slurry does not coat all surfaces of the current collector. This is because the tabs, which serve as electron transfer paths for the electrode, must be bonded to the current collector. Therefore, the electrode sheet that has undergone the coating step has a holding portion on the current collector where the electrode slurry is coated, and a non-coated portion on the current collector where the electrode slurry is not coated.

[0007] During the drying process, the shrinkage patterns of the retention and uncoated regions differ. The retention region, coated with electrode slurry, shrinks due to heat, whereas the uncoated region, uncoated, does not shrink due to heat. Consequently, stress concentration occurs in the uncoated region due to shrinkage of the retention region. This stress concentration in the uncoated region causes wrinkles and cracks in the electrode sheet, degrading its quality.

[0008]

[0009] The technical idea of ​​the present invention aims to solve a problem by resolving the stress concentration phenomenon that occurs in the non-conductive region, thereby preventing the occurrence of wrinkles and cracks in the electrode sheet.

[0010]

[0011] According to exemplary embodiments of the present invention for solving the above-described problem, a fluid injection device for drying an electrode sheet is provided. The fluid injection device for drying an electrode sheet includes: a fluid storage tank; a plurality of channels connected to be in fluid communication with the fluid storage tank; a first side nozzle coupled with one of the plurality of channels; a second side nozzle coupled with one of the plurality of channels; and at least one center nozzle coupled with one of the plurality of channels; wherein the first and second side nozzles and the center nozzle are configured to be movable in a first direction perpendicular to a machine direction (MD) of an electrode sheet.

[0012] The fluid injection device for drying the electrode sheet further comprises a cover at least partially accommodating the plurality of paths, the cover comprising first and second slots, the first and second side nozzles passing through the first slot, and the center nozzle passing through the second slot.

[0013] Each of the first and second slots can extend in the first direction.

[0014] The dimension of the first slot in the first direction may be equal to or greater than the dimension of the second slot in the first direction.

[0015] The center nozzle may be positioned between the first and second side nozzles in the first direction.

[0016] The number of the above center nozzles may be two or more.

[0017] Each of the above plurality of euros may include silicone or rubber.

[0018] The above electrode sheet drying fluid injection device may further include a control device configured to selectively supply fluid to the plurality of paths.

[0019] The control device may be configured to allow the supply of fluid to the passage associated with the first side nozzle and the passage associated with the second side nozzle when turned on, and to block the supply of fluid to the nozzle associated with the center nozzle.

[0020] The control device may be configured to allow the supply of fluid to the flow path associated with the first side nozzle, the flow path associated with the second side nozzle, and the flow path associated with the center nozzle when in the off state.

[0021] The above first direction may be the TD (transverse direction) of the electrode sheet.

[0022] According to exemplary embodiments of the present invention for solving the above-described problem, an electrode sheet drying device is provided. The electrode sheet drying device includes a conveying unit for conveying an electrode sheet; a drying unit for drying an electrode sheet conveyed by the conveying unit; and a fluid injection device for injecting a fluid onto the electrode sheet conveyed by the conveying unit, wherein the fluid injection device includes: a fluid storage tank; a plurality of channels connected to be in fluid communication with the fluid storage tank; a first side nozzle coupled with one of the plurality of channels; a second side nozzle coupled with one of the plurality of channels; and at least one center nozzle coupled with one of the plurality of channels; wherein the first and second side nozzles and the center nozzle are configured to be movable in a first direction perpendicular to a machine direction of the electrode sheet.

[0023] The center nozzle may be positioned between the first and second side nozzles in the first direction.

[0024] The number of the above center nozzles may be two or more.

[0025] Each of the first and second side nozzles and the center nozzle may be configured to spray fluid onto the non-conductive portion of the electrode sheet.

[0026]

[0027] The fluid injection device for drying an electrode sheet according to exemplary embodiments of the present invention can solve the stress concentration phenomenon that appears in the non-conductive portion, thereby preventing the occurrence of wrinkles and cracks in the electrode sheet.

[0028] The fluid injection device for drying electrode sheets according to exemplary embodiments of the present invention can be used for drying different electrode sheets having different patterns of non-conductive portions.

[0029] The effects that can be obtained from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure pertain from the following description. In other words, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0030]

[0031] FIG. 1 is a perspective view illustrating a fluid injection device for drying an electrode sheet according to exemplary embodiments of the present invention.

[0032] FIGS. 2 to 4 are conceptual diagrams schematically illustrating a fluid injection device for drying an electrode sheet according to exemplary embodiments of the present invention, respectively.

[0033] FIG. 5 is a conceptual diagram schematically illustrating an electrode sheet drying device according to exemplary embodiments of the present invention.

[0034]

[0035] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concept of a term to best explain his or her invention, they should be construed as meanings and concepts consistent with the technical spirit of the present invention.

[0036] Accordingly, 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. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0037] In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0038] Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for clarity. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes or proportions.

[0039] FIG. 1 is a perspective view illustrating a fluid injection device (100) for drying an electrode sheet according to exemplary embodiments of the present invention.

[0040] FIG. 2 is a conceptual diagram schematically illustrating a fluid injection device (100) for drying an electrode sheet according to exemplary embodiments of the present invention.

[0041] Referring to FIG. 2, the electrode sheet (400) may include a current collector (410) and an electrode slurry (420). In some embodiments, the electrode slurry (420) may be applied to one surface of the current collector (410). In some embodiments, the electrode slurry (420) may be applied to both surfaces of the current collector (410). A portion of the current collector (410) of the electrode sheet (400) where the electrode slurry (420) is applied may be referred to as a holding portion (C). A portion of the current collector (410) of the electrode sheet (400) where the electrode slurry (420) is not applied may be referred to as a non-conductive portion (N). In some embodiments, the electrode sheet (400) may be a positive electrode sheet or a negative electrode sheet.

[0042] Referring to FIGS. 1 and 2, the fluid injection device (100) for drying an electrode sheet may include a fluid storage tank (110), a first flow path (120), a second flow path (130), a first side nozzle (121), a second side nozzle (122), a first center nozzle (131), a second center nozzle (132), a cover (140), a first slot (141), a second slot (142), and a control device (150). Referring to FIG. 2, the fluid injection device (100) for drying an electrode sheet may inject a fluid onto an electrode sheet (400) being transported in a machine direction (MD).

[0043] Hereinafter, the TD (Transverse direction) of the electrode sheet (400) is defined as the X direction, the MD (machine direction) of the electrode sheet (400) is defined as the Y direction, and the direction substantially perpendicular to the electrode sheet (400) is defined as the Z direction. The X direction, the Y direction, and the Z direction may be substantially perpendicular to each other.

[0044] The fluid storage tank (110) may provide a space capable of storing fluid therein. In some embodiments, the shape of the fluid storage tank (110) may be a cylinder or a square cylinder. The fluid storage tank (110) may include a pump (not shown) that supplies fluid from inside the fluid storage tank (110) to the outside. The fluid storage tank (110) may include a pump control unit (not shown) that controls the operation of the pump (not shown). As the pump control unit (not shown) controls the pump (not shown), the flow rate of the fluid supplied from inside the fluid storage tank (110) to the outside can be controlled.

[0045] In some embodiments, the fluid may be water. In some embodiments, the fluid may be the same substance as the solvent of the electrode slurry. In some embodiments, the fluid may include an organic solvent such as N-methyl-2-pyrrolidone, dimethylformamide, acetone, dimethylacetamide, and mixtures thereof.

[0046] Each of the first flow path (120) and the second flow path (130) may be connected to be in fluid communication with the fluid storage tank (110). In some embodiments, each of the first flow path (120) and the second flow path (130) may be directly connected to the fluid storage tank (110) to receive fluid from the fluid storage tank (110). In some embodiments, each of the first flow path (120) and the second flow path (130) may be branched from a separate flow path directly connected to the fluid storage tank (110) to receive fluid from the fluid storage tank (110).

[0047] Each of the first flow path (120) and the second flow path (130) may comprise silicone or rubber. Each of the first flow path (120) and the second flow path (130) may be a silicone pipe, a silicone tube, a rubber pipe, or a rubber tube. In some embodiments, at least a portion of the first flow path (120) is movable in the X direction. In some embodiments, at least a portion of the second flow path (130) is movable in the X direction. In some embodiments, a portion of the first flow path (120) accommodated by the cover (140) is at least partially movable in the X direction. In some embodiments, a portion of the second flow path (130) accommodated by the cover (140) is at least partially movable in the X direction. The first flow path (120) may be movable in the X direction as needed. The second flow path (130) may be movable in the X direction as needed.

[0048] Each of the first side nozzles (121) and the second side nozzles (122) may be coupled to the first flow path (120). In some embodiments, each of the first side nozzles (121) and the second side nozzles (122) may be fit-coupled to each of protrusions (not shown) that are on the side surface of the first flow path (120) and protrude from the side surface of the first flow path (120). In some embodiments, the protrusions (not shown) may protrude in the Y direction from the side surface of the first flow path (120).

[0049] Each of the first side nozzle (121) and the second side nozzle (122) may include silicone or rubber.

[0050] Each of the first side nozzle (121) and the second side nozzle (122) can receive a fluid from the first flow path (120). Each of the first side nozzle (121) and the second side nozzle (122) can spray a fluid in the Z direction onto the non-coated portion (N) of the electrode sheet (400) corresponding to each of the first side nozzle (121) and the second side nozzle (122). Each of the first side nozzle (121) and the second side nozzle (122) can overlap with the non-coated portion (N) of the electrode sheet (400) corresponding to each of the first side nozzle (121) and the second side nozzle (122) in the Z direction.

[0051] Hereinafter, the center nozzle will be described, but for convenience of explanation, it will be assumed that there are two center nozzles. In some embodiments, the number of center nozzles may be one or more. In some embodiments, the number of center nozzles may be two or more. In some embodiments, the number of center nozzles may be three or more. In some embodiments, the number of center nozzles may be ten or less. In some embodiments, the number of center nozzles may be nine or less. In some embodiments, the number of center nozzles may be eight or less.

[0052] Each of the first center nozzle (131) and the second center nozzle (132) may be coupled to the second flow path (130). In some embodiments, each of the first center nozzle (131) and the second center nozzle (132) may be fit-coupled with each of protrusions (not shown) that are on the side of the second flow path (130) and protrude from the side of the second flow path (130). In some embodiments, the protrusions (not shown) may protrude in the Y direction from the side of the second flow path (130).

[0053] Each of the first center nozzle (131) and the second center nozzle (132) may include silicone or rubber.

[0054] Each of the first center nozzle (131) and the second center nozzles (132) can receive a fluid from the second flow path (130). Each of the first center nozzle (131) and the second center nozzles (132) can spray a fluid in the Z direction onto the uncoated portion (N) of the electrode sheet (400) corresponding to each of the first center nozzle (131) and the second center nozzles (132). Each of the first center nozzle (131) and the second center nozzles (132) can overlap with the uncoated portion (N) of the electrode sheet (400) corresponding to each of the first center nozzle (131) and the second center nozzle (132) in the Z direction.

[0055] Each of the first side nozzle (121) and the second side nozzle (122) is movable in the X direction. In some embodiments, each of the first side nozzle (121) and the second side nozzle (122) can be moved in the X direction by moving the first flow path (120) in the X direction. In some embodiments, each of the first side nozzle (121) and the second side nozzle (122) can be moved in the Z direction so as to overlap with the uncoated portion (N) of the electrode sheet (400) corresponding to each of the first side nozzle (121) and the second side nozzle (122). Accordingly, each of the first side nozzle (121) and the second side nozzle (122) can spray fluid onto the uncoated portion (N) of the electrode sheet (400). When each of the first side nozzle (121) and the second side nozzle (122) moves in the X direction, the distance (d1) in the X direction between the first side nozzle (121) and the second side nozzle (122) can be substantially constant.

[0056] Each of the first center nozzle (131) and the second center nozzles (132) is movable in the X direction. In some embodiments, by moving the second flow path (130) in the X direction, each of the first center nozzle (131) and the second center nozzles (132) can be moved in the X direction. In some embodiments, each of the first center nozzle (131) and the second center nozzles (132) can be moved in the Z direction so as to overlap with the uncoated portion (N) of the electrode sheet (400) corresponding to the first center nozzle (131) and the second center nozzle (132), respectively. Accordingly, each of the first center nozzle (131) and the second center nozzle (132) can spray fluid onto the uncoated portion (N) of the electrode sheet (400) corresponding to the first center nozzle (131) and the second center nozzle (132), respectively. When each of the first center nozzle (131) and the second center nozzle (132) moves in the X direction, the distance (d2) in the X direction between the first center nozzle (131) and the second center nozzle (132) can be substantially constant.

[0057] FIG. 3 is a conceptual diagram schematically illustrating a fluid injection device (100) for drying an electrode sheet according to exemplary embodiments of the present invention. FIG. 3 is different from FIG. 2 in the X-direction positions of each of the first center nozzle (131) and the second center nozzle (132). This is because the positions of the uncoated portions (N) of the electrode sheet (400) of FIG. 3 are different from the positions of the uncoated portions (N) of the electrode sheet (400) of FIG. 2. As described above, when the positions of the uncoated portions (N) of the electrode sheet (400) change, each of the first side nozzle (121), the second side nozzle (122), the first center nozzle (131), and the second center nozzle (132) can move in the X-direction to correspond to the changed positions of the uncoated portions (N) of the electrode sheet (400).

[0058] The distance (d2) in the X direction from the first center nozzle (131) to the second center nozzle (132) may be smaller than the distance (d1) in the X direction from the first side nozzle (121) to the second side nozzle (122). Each of the first center nozzle (131) and the second center nozzle (132) may be positioned between the first side nozzle (121) and the second side nozzle (122).

[0059] Referring back to FIG. 1, the cover (140) can at least partially accommodate each of the first flow path (120) and the second flow path (130). The cover (140) can protect and support each of the first flow path (120) and the second flow path (130). In some embodiments, the shape of the cover (140) can be a hollow cylinder or a hollow square cylinder. The cover (140) can provide a path along which each of the first side nozzle (121) and the second side nozzle (122) moves in the X direction while being fixed in the Y direction and the Z direction. The cover (140) can provide a path along which each of the first center nozzle (131) and the second center nozzle (132) moves in the X direction while being fixed in the Y direction and the Z direction.

[0060] The cover (140) may include first slots (141) and second slots (142). In some embodiments, the planar shape of each of the first slots (141) and the second slots (142) may be a rectangle or a round corner rectangle having a long width and a narrow width.

[0061] The first slot (141) can be passed through by each of the first side nozzles (121) and the second side nozzles (122). In some embodiments, the dimension of the first slot (141) in the narrow direction can be substantially the same as the dimension of each of the protrusions (not shown) that are on the side surface of the first flow path (120) and protrude in a direction substantially perpendicular to the narrow direction and the long direction from the side surface of the first flow path (120). Accordingly, the first slot (141) can fix the first side nozzles (121) and the second side nozzles (122) that are respectively fitted with the protrusions (not shown) of the first flow path (120) in the Z direction. In some embodiments, the dimension of the first slot (141) in the narrow direction can be smaller than the dimension of each of the first side nozzles (121) and the second side nozzles (122) in the narrow direction. Accordingly, the first slot (141) can fix each of the first side nozzle (121) and the second side nozzle (122) in the Y direction. The first slot (141) can be a path along which each of the first side nozzle (121) and the second side nozzle (122) moves in the X direction.

[0062] The second slot (142) can be passed through by each of the first center nozzle (131) and the second center nozzle (132). In some embodiments, the narrow-width dimension of the second slot (142) can be substantially the same as the narrow-width dimension of each of the protrusions (not shown) that are on the side surface of the second flow path (130) and protrude in a direction substantially perpendicular to the narrow-width direction and the long-width direction from the side surface of the second flow path (130). Accordingly, the second slot (142) can fix the first center nozzle (131) and the second center nozzle (132), which are respectively fitted and connected to the protrusions (not shown) of the second flow path (130), in the Z direction. In some embodiments, the narrow-width dimension of the second slot (142) can be smaller than the narrow-width dimension of each of the second center nozzle (131) and the second center nozzle (132). Accordingly, the second slot (142) can fix each of the first center nozzle (131) and the second center nozzle (132) in the Y direction. The second slot (142) can be a path along which each of the first center nozzle (131) and the second center nozzle (132) moves in the X direction.

[0063] In some embodiments, the X-direction dimension of the first slot (141) may be substantially equal to the X-direction dimension of the second slot (142). In some embodiments, the X-direction dimension of the first slot (141) may be greater than the X-direction dimension of the second slot (142).

[0064] In some embodiments, the first slot (141) may be positioned higher than the second slot (142) in the Z direction. In this case, each of the first side nozzles (121) and the second side nozzles (122) may be positioned higher than each of the first center nozzles (131) and the second center nozzles (132) in the Z direction. In this case, each of the first side nozzles (121) and the second side nozzles (122) may be positioned further from the electrode sheet (400) than each of the first center nozzles (131) and the second center nozzles (132).

[0065] In some embodiments, the first slot (141) may be positioned lower than the second slot (142) in the Z direction. In this case, each of the first side nozzles (121) and the second side nozzles (122) may be positioned lower than each of the first center nozzles (131) and the second center nozzles (132) in the Z direction. In this case, each of the first side nozzles (121) and the second side nozzles (122) may be positioned closer to the electrode sheet (400) than each of the first center nozzles (131) and the second center nozzles (132).

[0066] The control device (150) can be configured to selectively supply fluid to each of the first flow path (120) and the second flow path (130). The user can control the control device (150) in response to the pattern of the non-conductive portion (N) of the electrode sheet (400).

[0067] The control device (150) may be configured to allow the supply of fluid to the first flow path (120) and block the supply of fluid to the second flow path (130) when the control device (150) is in the on state. When the control device (150) is in the on state, the supply of fluid to the first flow path (120) is allowed, and thus the supply of fluid to each of the first side nozzle (121) and the second side nozzle (122) is allowed. Accordingly, each of the first side nozzle (121) and the second side nozzle (122) can spray fluid to the uncoated portion (N) of the electrode sheet (400) corresponding to each of the first side nozzle (121) and the second side nozzle (122). When the control device (150) is in the on state, the supply of fluid to the second flow path (130) is blocked, and thus the supply of fluid to each of the first center nozzle (131) and the second center nozzle (132) is blocked.

[0068] Fig. 4 is a conceptual diagram schematically illustrating a fluid injection device for drying an electrode sheet according to exemplary embodiments of the present invention. Fig. 4 differs from Fig. 2 in the pattern of the non-conductive portion (N) of the electrode sheet (400). Fig. 4 is a diagram for a case where the control device (150) is turned on, and Fig. 2 is a diagram for a case where the control device (150) is turned off.

[0069] Referring to FIG. 4, each of the first side nozzles (121) and the second side nozzles (122) can overlap in the Z direction the uncoated portion (N) of the electrode sheet (400) corresponding to each of the first side nozzles (121) and the second side nozzles (122). Referring to the arrows in FIG. 4, each of the first side nozzles (121) and the second side nozzles (122) can spray fluid to the uncoated portion (N) of the electrode sheet (400) corresponding to each of the first side nozzles (121) and the second side nozzles (122). Each of the first center nozzles (131) and the second center nozzles (132) can overlap in the Z direction the holding portion (C) of the electrode sheet (400). Referring to the arrows in Fig. 4, since the supply of fluid to each of the first center nozzle (131) and the second center nozzle (132) is blocked, each of the first center nozzle (131) and the second center nozzle (132) may not spray fluid.

[0070] The control device (150) may be configured to allow the supply of fluid to each of the first flow path (120) and the second flow path (130) in the off state. Since the control device (150) allows the supply of fluid to each of the first flow path (120) and the second flow path (130) when in the off state, the supply of fluid to each of the first side nozzle (121), the second side nozzle (122), the first center nozzle (131), and the second center nozzle (132) is allowed. Accordingly, each of the first side nozzle (121), the second side nozzle (122), the first center nozzle (131), and the second center nozzle (132) can spray fluid onto the non-coated portion (N) of the electrode sheet (400) corresponding to each of the first side nozzle (121), the second side nozzle (122), the first center nozzle (131), and the second center nozzle (132).

[0071] Referring to FIG. 2, each of the first side nozzle (121), the second side nozzle (122), the first center nozzle (131), and the second center nozzle (132) can overlap in the Z direction the uncoated portion (N) of the electrode sheet (400) corresponding to each of the first side nozzle (121), the second side nozzle (122), the first center nozzle (131), and the second center nozzle (132). Referring to the arrows in FIG. 2, each of the first side nozzle (121), the second side nozzle (122), the first center nozzle (131), and the second center nozzle (132) can spray a fluid onto the uncoated portion (N) of the electrode sheet (400) corresponding to each of the first side nozzle (121), the second side nozzle (122), the first center nozzle (131), and the second center nozzle (132).

[0072] In some embodiments, the control device (150) may be located at a point where each of the first flow path (120) and the second flow path (130) branches off from a separate flow path directly connected to the fluid storage tank (110). In some embodiments, the control device (150) may be an AC solenoid valve, a DC solenoid valve, a ball valve, a butterfly valve, a globe valve, a gate valve, a diaphragm valve, or a three-way valve.

[0073] In some embodiments, the number of control devices (150) may be two or more, in which case the first control device may be located in the first flow path (120) and the second control device may be located in the second flow path (130). When the number of control devices (150) is two or more, each control device may block the supply of fluid to the flow path corresponding to each control device when in the on state and allow the supply of fluid to the flow path corresponding to each control device when in the off state.

[0074] FIG. 5 is a conceptual diagram schematically illustrating an electrode sheet drying device (10) according to exemplary embodiments of the present invention.

[0075] Referring to FIG. 5, the electrode sheet drying device (10) may include a fluid injection device (100) for drying the electrode sheet, a drying unit (200), a transport unit (300), and a housing (500), and an electrode sheet (400) may be transported into the electrode sheet drying device (10).

[0076] The housing (500) can protect and support the fluid injection device (100) for drying the electrode sheet, the drying unit (200), and the transport unit (300). The housing (500) can provide an internal space (510) for drying the electrode sheet (400). Heat used for drying the electrode sheet (400) can circulate in the internal space (510) of the housing (500). The housing (500) can include an exhaust hole (not shown) configured to discharge the heat used for drying the electrode sheet (400) to the outside.

[0077] An inlet (520) through which an electrode sheet (400) is introduced may be located on one side of the housing (500). An outlet (530) through which an electrode sheet (400) is discharged may be located on the other side of the housing (500). The inlet (520) and the outlet (530) may be located in opposite directions in the Y direction.

[0078] The fluid injection device (100) for drying the electrode sheet is the same as described above, so a duplicate description thereof is omitted.

[0079] The drying unit (200) can supply thermal energy to the electrode sheet (400) to remove solvent or moisture from the electrode slurry (420). In some embodiments, the drying unit (200) can be a hot air supply heater.

[0080] The transport unit (300) can transport the electrode sheet (400) in the Y direction. In some embodiments, the transport unit (300) can include a plurality of rollers that rotate under power from a motor (not shown). The electrode sheet (400) can be transported in the Y direction by the rotation of the plurality of rollers.

[0081] The arrangement and number of each of the electrode sheet drying fluid injection device (100) and the drying unit (200) disclosed in FIG. 5 are merely non-limiting examples. In some embodiments, the electrode sheet drying fluid injection device (100) may be disposed inside the drying unit (200). In some embodiments, the number of each of the electrode sheet drying fluid injection device (100) and the drying unit (200) may be two or more. In some embodiments, each of the electrode sheet drying fluid injection device (100) and the drying unit (200) may be disposed below the electrode sheet (400) unlike that disclosed in FIG. 5.

[0082] The present invention has been described in more detail through drawings and examples. However, the configurations described in the drawings or examples described in this specification are merely embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

[0083]

[0084] [drawing symbol]

[0085] 10: Electrode sheet drying device

[0086] 100: Fluid injection device for drying electrode sheets

[0087] 110: Fluid storage tank

[0088] 120: 1st Euro

[0089] 121, 122: Side nozzle

[0090] 130: Second Euro

[0091] 131, 132: Center nozzle

[0092] 140: Cover

[0093] 141, 142: Slots

[0094] 150: Control unit

[0095] 200: Drying section

[0096] 300: Transport section

[0097] 400: Electrode sheet

[0098] 410: Whole house

[0099] 420: Electrode slurry

[0100] 500: Housing

[0101] 510: Interior space

[0102] 520: Inlet

[0103] 530: exhaust port

[0104] C: Maintenance Department

[0105] N: Ministry of Immigration

Claims

1. Fluid storage tank; A plurality of flow paths connected to be in fluid communication with the fluid storage tank; A first side nozzle coupled with one of the plurality of said euros; A second side nozzle coupled with one of the plurality of said euros; At least one center nozzle coupled to one of the plurality of said euros; An electrode sheet drying fluid injection device, characterized in that the first and second side nozzles and the center nozzle are configured to be movable in a first direction perpendicular to the MD (machine direction) of the electrode sheet.

2. In paragraph 1, further comprising a cover at least partially accommodating the plurality of euros; The cover includes first and second slots, The first and second side nozzles pass through the first slot, and A fluid injection device for drying an electrode sheet, characterized in that the center nozzle passes through the second slot.

3. In paragraph 2, An electrode sheet drying fluid injection device, characterized in that each of the first and second slots extends in the first direction.

4. In paragraph 3, An electrode sheet drying fluid injection device, characterized in that the dimension of the first slot in the first direction is equal to or larger than the dimension of the second slot in the first direction.

5. In paragraph 3, An electrode sheet drying fluid injection device, characterized in that the center nozzle is positioned between the first and second side nozzles in the first direction.

6. In paragraph 1, A fluid injection device for drying an electrode sheet, characterized in that the number of center nozzles is two or more.

7. In paragraph 1, An electrode sheet drying fluid injection device, wherein each of the plurality of euros comprises silicone or rubber.

8. In paragraph 1, A fluid injection device for drying an electrode sheet, characterized in that it further comprises a control device configured to selectively supply fluid to the plurality of said paths.

9. In paragraph 8, When the above control device is turned on, Allowing the supply of fluid to the first side nozzle and the second side nozzle combined with the duct, A fluid injection device for drying an electrode sheet, characterized in that it is configured to block the supply of fluid to a nozzle combined with the above center nozzle.

10. In paragraph 8, When the above control device is in the off state, A fluid injection device for drying an electrode sheet, characterized in that it is configured to allow the supply of fluid to a passage combined with the first side nozzle, a passage combined with the second side nozzle, and a passage combined with the center nozzle.

11. In paragraph 1, An electrode sheet drying fluid injection device, characterized in that the first direction is the TD (transverse direction) of the electrode sheet.

12. A transport section for transporting electrode sheets; A drying unit for drying the electrode sheet transported by the above transport unit; and It includes a fluid injection device that injects fluid onto an electrode sheet transported by the above transport unit, The above fluid injection device, fluid storage tank; A plurality of flow paths connected to be in fluid communication with the fluid storage tank; A first side nozzle coupled with one of the plurality of said euros; A second side nozzle coupled with one of the plurality of said euros; At least one center nozzle coupled to one of the plurality of said euros; An electrode sheet drying device, characterized in that the first and second side nozzles and the center nozzle are configured to be movable in a first direction perpendicular to the machine direction of the electrode sheet.

13. In paragraph 12, An electrode sheet drying device, characterized in that the center nozzle is located between the first and second side nozzles in the first direction.

14. In paragraph 12, An electrode sheet drying device characterized in that the number of center nozzles is two or more.

15. In paragraph 12, An electrode sheet drying device characterized in that each of the first and second side nozzles and the center nozzle is configured to spray fluid onto the non-conductive portion of the electrode sheet.

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