Electrode splicing device and method

Abstract

According to exemplary embodiments of the present invention, an electrode splicing device is provided. The electrode splicing device comprises: a first splicing unit capable of gripping a trailing end part of a running electrode sheet; a second splicing unit which is positioned to face the first splicing unit and which can grip a leading end part of a standby electrode sheet; and a line contact type pressing unit for bonding, using tape, the trailing end part of the running electrode sheet and the leading end part of the standby electrode sheet. In addition, the present invention provides an electrode splicing method using the electrode splicing device.

Description

Electrode splicing device and method

[0001] The present invention relates to the supply of battery electrodes, and specifically to an electrode splicing device that improves the bonding strength of a joint portion between a driving electrode sheet and a standby electrode sheet, and an electrode splicing method using the same. The present application claims the benefit of Korean application No. 10-2024-0182004 filed on December 9, 2024, which is incorporated herein by reference in its entirety.

[0002] As technology development and demand for mobile devices and electric vehicles increase, the demand for secondary batteries as an energy source is rapidly growing.

[0003] Rechargeable batteries are batteries capable of repeated charging and discharging, and are fundamentally composed of a battery case, electrodes, a separator, and an electrolyte. Electrodes for rechargeable batteries are manufactured by unwinding electrode sheets wound on rolls, transporting them at a constant speed, and processing them. To this end, the electrode manufacturing line unwinds and supplies the electrode sheets through a splicing unit.

[0004] Generally, a splicing unit is required to continuously supply electrode sheets. Continuous supply is achieved by mounting electrode rolls on electrode roll bobbins equipped in each splicing unit and sequentially unwinding and supplying electrode sheets from the electrode rolls. For example, after supplying an electrode sheet from one electrode roll, when the electrode sheet is nearly consumed, the leading edge of the electrode sheet from the other electrode roll is attached to the end of the electrode sheet from the first electrode roll to continue the supply.

[0005] The joint bonding between these electrode sheets is achieved through a cutting process for cutting the electrode sheets and a taping process.

[0006] However, conventionally, the joint joining of the aforementioned electrode sheets in the two splicing units was not smooth. In the past, accidents occurred where the splicing tables of the two splicing units became misaligned or the suction pressure of the intermediate suction plate dropped, causing breakage in the initial tension rise section of the tape joint.

[0007] [Prior Art Literature]

[0008] Korean Published Patent Application No. 10-2023-0168547 (Publication Date: Dec. 14, 2023)

[0009] In order to solve the problems of the prior art described above, the present invention aims to provide an electrode splicing device that improves bonding strength at the joint portion between electrode sheets.

[0010] Another objective of the present invention is to provide an electrode splicing method using such an electrode splicing device.

[0011] According to exemplary embodiments of the present invention for achieving the above-described purpose, an electrode splicing device is provided.

[0012] The electrode splicing device comprises: a first splicing unit capable of gripping the end portion of a driving electrode sheet; and a second splicing unit positioned opposite to the first splicing unit and capable of gripping the front portion of a standby electrode sheet; and may further comprise a line-contact type pressure unit for joining the end portion of the driving electrode sheet and the front portion of the standby electrode sheet with a tape.

[0013] In the electrode splicing device above, the line contact type pressure unit can move along the longitudinal direction of the second splicing unit and compress the tape.

[0014] In the electrode splicing device, the line contact type pressure unit comprises: a tape pressure roller installed on one side of the second splicing unit; a roller holder supporting the tape pressure roller; a lifting cylinder for raising and lowering the roller holder; and a forward / backward cylinder for advancing the tape pressure roller to compress the tape.

[0015] In the electrode splicing device above, the first splicing unit comprises a first upper adsorption plate, a first lower adsorption plate forming a certain space with the first upper adsorption plate, a first intermediate adsorption plate capable of moving back and forth to the space between the first upper adsorption plate and the first lower adsorption plate, and an electrode cutting blade capable of cutting the driving electrode sheet.

[0016] In the electrode splicing device, the second splicing unit comprises a second upper adsorption plate, a second lower adsorption plate forming a certain space with the second upper adsorption plate, a second intermediate adsorption plate capable of moving back and forth to the space between the second upper adsorption plate and the second lower adsorption plate, a tape supply unit providing tape to the second intermediate adsorption plate, and a shuttle unit capable of reciprocating the line contact type pressurizing unit along the longitudinal direction of the second splicing unit.

[0017] Meanwhile, according to exemplary embodiments of the present invention, an electrode splicing method using the electrode splicing device is provided.

[0018] The electrode splicing method comprises the steps of: cutting the lower portion of a driving electrode sheet; aligning the leading portion of a standby electrode sheet with the end of the driving electrode sheet from which the lower portion has been cut; supplying a tape to the joint portion between the aligned end of the driving electrode sheet and the leading portion of the standby electrode sheet; pressing the tape to temporarily attach it; and applying pressure to the tape by a line contact method by rolling.

[0019] In the electrode splicing method above, the cutting comprises: a step of advancing a first splicing unit toward a second splicing unit to adsorb the driving electrode sheet by a first adsorption plate; and a step of moving an electrode cutting blade along the width direction of the adsorbed driving electrode sheet to cut the lower portion of the driving electrode sheet.

[0020] The alignment of the electrode sheet in the above electrode splicing method comprises: a step of preparing the atmospheric electrode sheet by adsorbing the leading edge of the atmospheric electrode sheet to a second adsorption plate of a second splicing unit; and a step of advancing the second splicing unit toward a first splicing unit to align the leading edge of the atmospheric electrode sheet with the end of the driving electrode sheet with the lower end cut.

[0021] In the above electrode splicing method, the tape supply comprises the steps of: withdrawing a tape from a tape supply portion of a first splicing unit and adsorbing the tape to a second intermediate adsorption plate of a second splicing unit; and cutting the withdrawn tape while the tape is adsorbed.

[0022] In the electrode splicing method above, the temporary attachment of the tape comprises: a step of advancing a second intermediate adsorption plate on which the tape is adsorbed toward the first splicing unit to position the tape at the joint portion between the driving electrode sheet and the standby electrode sheet; and a step of attaching the tape by pressing it with the second intermediate adsorption plate and then retracting the second intermediate adsorption plate.

[0023] In the electrode splicing method above, the pressure of the tape comprises: a step of lowering a tape pressure roller installed on one side of a second splicing unit; a step of advancing the tape pressure roller toward the attached tape; a step of reciprocating the tape pressure roller along the longitudinal direction of the second splicing unit to pressure the attached tape; and a step of retracting the tape pressure roller and then raising it to move it to its original position.

[0024] The electrode splicing method described above may further include the step of retracting the second splicing unit after pressurizing the tape; and the step of retracting the first splicing unit.

[0025] The electrode splicing device and method according to exemplary embodiments of the present invention can improve production efficiency by preventing breakage of the electrode sheet in the initial tape tension rising section by improving the bonding force in a line contact method by rolling at the joint portion between the traveling electrode sheet and the standing electrode sheet.

[0026] The effects obtainable from the exemplary embodiments of the present invention are not limited to those mentioned above, and other unmentioned effects can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure belong from the following description. That is, unintended effects resulting from the implementation of 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.

[0027] FIG. 1 is a schematic configuration of an electrode splicing device according to an exemplary embodiment of the present invention, where FIG. 1a shows the appearance of a driving electrode sheet and a standby electrode sheet before joining, and FIG. 1b shows the appearance after joining.

[0028] FIG. 2 is a perspective view of the second splicing unit of FIG. 1a.

[0029] Figure 3 is a detailed view of the line contact type pressurizing unit of Figure 1a.

[0030] Figure 4 is a detailed view of the line contact type pressurizing unit and tape supply unit of Figure 2.

[0031] FIG. 5 is a flowchart illustrating the electrode splicing method of the present invention.

[0032] Figure 6 is a photograph showing the results of a pressure reduction test on the intermediate adsorption plate of the electrode splicing device of the present invention.

[0033] Figure 7 is a photograph showing the results of a pressure reduction test comparing the before (a) and after (b) of applying a tape pressure roller to an electrode splicing device.

[0034] 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. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe his invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention.

[0035] Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are merely some of the most preferred embodiments of the invention and do not represent all of the technical ideas of the invention, and that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0036] In addition, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted.

[0037] Since embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or schematically depicted for clearer explanation. Accordingly, the size or proportion of each component does not entirely reflect the actual size or proportion.

[0038] (1st embodiment)

[0039] FIG. 1 is a schematic configuration of an electrode splicing device (100) according to an exemplary embodiment of the present invention, FIG. 1a shows the appearance before joining the driving electrode sheet (A) and the standby electrode sheet (B), and FIG. 1b shows the appearance after joining. FIG. 2 is a perspective view of the second splicing unit (102) of FIG. 1a, FIG. 3 is a detailed view of the line contact type pressurizing unit (130) of FIG. 1a, and FIG. 4 is a detailed view of the line contact type pressurizing unit (130) and the tape supply unit (140) of FIG. 2.

[0040] For convenience of explanation, in the drawings, the width direction of a pair of electrode splicing units (101, 102) is defined as the X direction, the length direction of the splicing units (101, 102) as the Y direction, and the height direction of the splicing units (101, 102) as the Z direction.

[0041] As shown in FIGS. 1a and 1b, the electrode splicing device (100) according to the present embodiment aligns the leading edge of a standby electrode sheet (B) with the end of a cut traveling electrode sheet (A) and adheres a tape. In the drawings, the traveling electrode sheet (A) is a roll electrode sheet that is almost consumed while traveling in the Z direction, and the standby electrode sheet (B) is a roll electrode sheet to be used anew. These electrode sheets (A, B) are initially mounted on electrode roll bobbins (114) located at the rear of a pair of electrode splicing units (101, 102), respectively (see FIG. 4).

[0042] Referring to FIGS. 1 to 4, an electrode splicing device (100) according to an exemplary embodiment of the present invention includes a pair of electrode splicing units (101, 102) and a line contact type pressurizing unit (130).

[0043] A pair of electrode splicing units (101, 102) may be divided into a first splicing unit (101) and a second splicing unit (102) for convenience. The first splicing unit (101) can advance or retract in the width direction (X direction) of the splicing unit (101) on the splicing table (103), and the second splicing unit (102) can advance or retract in the width direction (X direction) of the splicing unit (102) on the splicing table (104). Accordingly, the first splicing unit (101) and the second splicing unit (102) may advance in the X direction relative to each other to grasp the driving electrode sheet (A), and may each retract in the X direction to advance the driving electrode sheet (A) in the Z direction.

[0044] The first splicing unit (101) can grasp the end portion of the driving electrode sheet (A), and the second splicing unit (102) is positioned opposite the first splicing unit (101) and can grasp the front portion of the standby electrode sheet (B). The first splicing unit (101) and the second splicing unit (102) may each have the same structure. Accordingly, depending on the production line site, the first splicing unit (101) may be arranged to grasp the standby electrode sheet (B) and the second splicing unit (102) may be arranged to grasp the driving electrode sheet (A).

[0045] For convenience of explanation, the following description will focus on the second splicing unit (102), under the premise that the first splicing unit (101) and the second splicing unit (102) have similar structures.

[0046] The second splicing unit (102) includes a second adsorption plate (120), a second intermediate adsorption plate (124), and a line contact type pressurizing unit (130).

[0047] The second adsorption plate (120) includes a second upper adsorption plate (121) and a second lower adsorption plate (122), and may have a certain space (125) between the second upper adsorption plate (121) and the second lower adsorption plate (122). A plurality of suction holes are formed in the second upper adsorption plate (121), and a plurality of suction holes are also formed in the second lower adsorption plate (122). Accordingly, the second adsorption plate (120) is able to adsorb an atmospheric electrode sheet (B) by creating a vacuum state through the plurality of suction holes.

[0048] The second intermediate adsorption plate (124) is positioned between the second upper adsorption plate (121) and the second lower adsorption plate (122), and can advance or retract into the space (125) between the two plates (121, 122). Although not illustrated, a plurality of adsorption holes are also formed in the second intermediate adsorption plate (124). The second adsorption plate (120) and the second intermediate adsorption plate (124) are installed on the fixed bracket (126) of the second splicing unit (102), and the unit itself can move in the X direction by sliding on the lower moving table.

[0049] The line contact type pressure unit (130) may include a tape pressure roller (131), a roller holder (132) that supports the tape pressure roller (131), a lifting cylinder (133) that raises or lowers the roller holder (132), and a forward / backward cylinder (134) that moves the roller holder (132) forward or backward.

[0050] A tape pressure roller (131) may be installed on one side of the second splicing unit (102). A lifting cylinder (133) can raise and lower a roller holder (132) supporting the tape pressure roller (131) in the Z direction. Additionally, a forward / backward cylinder (134) can advance and retract the roller holder (132) in the X direction. Accordingly, the tape pressure roller (131) can move in the Z direction by the lifting cylinder (133), and at the same time, move in the X direction by the forward / backward cylinder (134), so that it can move to compress the tape.

[0051] The second splicing unit (102) includes a shuttle section (110) that enables the line contact type pressurizing unit (130) to reciprocate in the longitudinal direction of the second splicing unit (102), i.e., in the Y direction. The shuttle section (110) includes a shuttle belt (112) mounted on the line contact type pressurizing unit (130) and a shuttle rail (113) that guides the line contact type pressurizing unit (130) to move along the Y direction.

[0052] Specifically, the forward and backward cylinder (134) of the line contact type pressure unit (130) can be installed to move along the shuttle rail (113). Accordingly, the tape pressure roller (131) of the line contact type pressure unit (130) can move in the X direction by the forward and backward cylinder (134) to press the tape, and then move along the length direction (Y direction) of the second splicing unit (102) to compress the tape.

[0053] In the second splicing unit (102), the tape supply unit (140) is located on one side of the second splicing unit (102) and can supply tape to the second intermediate adsorption plate (124).

[0054] The tape supply unit (140) may include a roll tape holder (141) for holding a roll tape, a roll tension guide (142) for guiding the tape supplied from the roll tape holder (141) and applying tension, a tape cutting cylinder (143) for cutting the tape, and a tape gripper (144) for gripping the cut tape and moving it in the Y direction.

[0055] In the tape supply unit (140), the tape supplied from the tape holder (141) is pulled taut by the roll tension guide (142) and the tape is gripped by the tape gripper (144). In this state, the tape gripper (144) moves in the longitudinal direction, i.e., the Y direction, of the second splicing unit (102), and the second intermediate suction plate (124) advances in the X direction and sucks the tape. Afterward, the tape cutting cylinder (143) cuts the tape, and the tape gripper (144) and the tape cutting cylinder (143) return to their original positions.

[0056] In addition, the second splicing unit (102) may include an electrode cutting blade capable of cutting the atmosphere electrode sheet (B). The electrode cutting blade can cut the atmosphere electrode sheet (B) by moving in the Y direction to the cutting guide block (127) by the electrode cutting blade transfer belt (128).

[0057] Meanwhile, similar to the second splicing unit (102), the first splicing unit (101) may include a first upper adsorption plate, a first lower adsorption plate forming a certain space with the first upper adsorption plate, and a first intermediate adsorption plate capable of moving back and forth to the space between the first upper adsorption plate and the first lower adsorption plate. Since these plates are identical to those of the second splicing unit (102), a redundant description is omitted here.

[0058] In addition, the first splicing unit (101) may have a tape supply unit of the same structure as the second splicing unit (102).

[0059] In addition, the same electrode cutting blade as in the second splicing unit (102) is installed in the first splicing unit (101) to cut the driving electrode sheet (A).

[0060] In the second embodiment described below, we will examine in detail the method of joining electrode sheets using such an electrode splicing device (100).

[0061]

[0062] (2nd Example)

[0063] FIG. 5 is a flowchart illustrating the electrode splicing method of the present invention.

[0064] Referring to FIG. 5 together with FIG. 1 to 4, the electrode splicing method according to the present invention comprises the steps of: cutting the lower portion of a driving electrode sheet (A) (S110); aligning the leading portion of a standby electrode sheet (B) with the end of the driving electrode sheet (A) with the lower portion cut (S120); supplying a tape to the joint portion between the aligned end of the driving electrode sheet (A) and the leading portion of the standby electrode sheet (B) (S130); pressing the tape to temporarily attach it (S140); and pressing the tape in a line contact manner by rolling (S150).

[0065] In order to attach the standby electrode sheet (B) to the driving electrode sheet (A), it is necessary to cut off a portion of the leading edge of the standby electrode sheet (B) to leave a straight cutting line. Additionally, it is preferable to cut off the lower part of the driving electrode sheet (A) to leave a straight cutting line.

[0066] Specifically, in the driving electrode cutting step (S110), the first splicing unit (101) advances in the X direction toward the second splicing unit (102), and the first adsorption plate of the first splicing unit (101) adsorbs and grips the driving electrode sheet (A). The first splicing unit (101) moves about half the distance between the two splicing units (101, 102) to grip the driving electrode sheet (A).

[0067] In that state, the electrode cutting blade moves between the first upper adsorption plate and the first lower adsorption plate of the first adsorption plate (120) and cuts the lower portion of the driving electrode sheet (A). When the cutting process by the electrode cutting blade is completed, the cut lower portion of the driving electrode sheet (A) falls downward due to its own weight.

[0068] Next, in order to connect the driving electrode sheet (A) and the waiting electrode sheet (B), the waiting electrode sheet (B) is prepared by adsorbing the leading edge of the waiting electrode sheet (B) to the second adsorption plate (120) of the second splicing unit (102), and the second splicing unit (102) is advanced in the X direction toward the first splicing unit (101) to align the leading edge of the waiting electrode sheet (B) with the end of the driving electrode sheet (A) that has its lower end cut (S120). At this time, a vision sensor or the like is used to align the widthwise edge line of the end of the driving electrode sheet (A) and the leading edge of the waiting electrode sheet (B) so that they do not become misaligned.

[0069] Through the above process, when the end of the driving electrode sheet (A) and the front end of the standby electrode sheet (B) align, the tape is withdrawn from the tape supply unit (140) and supplied to the second intermediate adsorption plate (124) (S130). The tape supplied to the second intermediate adsorption plate (124) is adsorbed, and the withdrawn tape is cut by the tape cutting cylinder (143) while the tape is adsorbed.

[0070] Next, the second intermediate adsorption plate (124) on which the tape is adsorbed is advanced in the X direction toward the first splicing unit (101) to supply the tape to the joint portion between the driving electrode sheet (A) and the standby electrode sheet (B). Then, after attaching the tape by pressing it with the second intermediate adsorption plate (124), the second intermediate adsorption plate (124) is retracted so that the tape can be temporarily attached to the joint portion (S140).

[0071] If we briefly refer to FIG. 6 to examine the temporary attachment state of the tape, we can clearly see the linear contact pressure effect by rolling according to the present embodiment.

[0072] FIG. 6 shows the results of a pressure reduction test on the second intermediate adsorption plate (124) in the electrode splicing device (100) of the present invention.

[0073] As can be seen from the color map photograph shown in FIG. 6, in a conventional electrode splicing device, the second upper adsorption plate (121) and the second lower adsorption plate (122) (position 2 in FIG. 6) show some degree of pressure reduction effect, but when the tape is attached only with the second intermediate adsorption plate (124), almost no pressure reduction effect is observed in the second intermediate adsorption plate (position 1 in FIG. 6).

[0074] Accordingly, in the electrode splicing device (100) of the present invention, after the tape attachment step (S140) by the second intermediate adsorption plate (124), the tape can be reliably compressed by applying a line contact pressure.

[0075] In the line-contact type tape pressing step (S150) according to the present invention, the tape pressing roller (131) is lowered by lowering the lifting cylinder (133) in the Z direction from one side of the second splicing unit (102), and the tape pressing roller (131) is moved in the X direction through the forward / backward cylinder (134) to advance the tape pressing roller (131) to the attached tape.

[0076] Next, the tape pressure roller (131) is reciprocated along the longitudinal direction, i.e., the Y direction, of the second splicing unit (102) to apply pressure to the attached tape. The tape pressure roller (131) may apply pressure to the tape while advancing in the Y direction, or may apply pressure to the tape again while retracting. Afterward, the tape pressure roller (131) is retracted and raised to return to its original position.

[0077] After the tape attachment is completed in this manner, the second adsorption plate (120) is moved and separated in the X direction, and finally, the first adsorption plate is retracted in the X direction, allowing the driving electrode sheet (A) to be continuously transported in the Z direction.

[0078]

[0079] (3rd Example)

[0080] Figure 7 is a photograph showing the results of a pressure reduction test comparing the before (a) and after (b) of applying a tape pressure roller (131) to an electrode splicing device (100).

[0081] As shown in FIG. 7a, in an electrode splicing device (100) without a tape pressure roller (131), the adhesive state of the tape at the joint between the electrode sheets drops significantly to 0.1 MPa. On the other hand, as shown in FIG. 7b, in an electrode splicing device (100) with a tape pressure roller (131) applied, it can be seen that the adhesive state of the tape at the joint between the electrode sheets improves significantly to 1.1 MPa. That is, by applying a line-contact pressure unit by rolling according to the present embodiment, the joint between the driving electrode sheet and the standby electrode sheet is made secure, so that breakage does not occur at the joint of the tape, thereby ensuring smooth operation of the production line.

[0082] The present invention has been described in more detail above through drawings and embodiments. However, the configurations described in the drawings or embodiments described in this specification are merely one embodiment of the present invention and do not represent all technical concepts of the present invention; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

Claims

1. A first splicing unit capable of gripping the end portion of a driving electrode sheet; and A second splicing unit positioned opposite to the first splicing unit and capable of gripping the leading edge of the atmospheric electrode sheet; comprising An electrode splicing device further comprising a line-contact type pressure unit for joining the end portion of the driving electrode sheet and the front portion of the standby electrode sheet with tape.

2. In Paragraph 1, The electrode splicing device is characterized in that the above-mentioned line-contact pressurizing unit moves along the longitudinal direction of the above-mentioned second splicing unit and compresses the tape.

3. In Paragraph 2, The above-mentioned line-contact pressurizing unit is, A tape pressure roller installed on one side of the second splicing unit; A roller holder supporting the above tape pressure roller; A lifting cylinder for raising and lowering the above roller holder; and An electrode splicing device comprising: a forward and backward cylinder that advances the tape pressure roller to compress the tape.

4. In Paragraph 1, The above-mentioned first splicing unit is, A first upper adsorption plate and, A first lower adsorption plate forming a certain space with the first upper adsorption plate and, A first intermediate adsorption plate capable of moving back and forth into the space between the first upper adsorption plate and the first lower adsorption plate, and An electrode splicing device comprising an electrode cutting blade capable of cutting the above-mentioned driving electrode sheet.

5. In Paragraph 1, The above-mentioned second splicing unit is, A second upper adsorption plate and, A second lower adsorption plate forming a certain space with the second upper adsorption plate and, A second intermediate adsorption plate capable of moving back and forth into the space between the second upper adsorption plate and the second lower adsorption plate, and A tape supply unit that provides tape to the second intermediate adsorption plate, and An electrode splicing device comprising a shuttle unit capable of reciprocating the above-mentioned line-contact pressurizing unit along the longitudinal direction of the above-mentioned second splicing unit.

6. Step of cutting the lower part of the driving electrode sheet; A step of aligning the leading edge of the standby electrode sheet with the end of the driving electrode sheet with the lower end cut above; A step of supplying tape to the joint portion between the end of the aligned driving electrode sheet and the front end of the standby electrode sheet; Step of temporarily attaching the above tape by pressing it; and An electrode splicing method comprising the step of applying pressure to the above tape in a line contact manner by rolling.

7. In Paragraph 6, The above cutting is, A step of advancing the first splicing unit toward the second splicing unit to adsorb the driving electrode sheet by the first adsorption plate; and An electrode splicing method comprising the step of cutting the lower portion of the adsorbed driving electrode sheet by moving an electrode cutting blade along the width direction of the adsorbed driving electrode sheet.

8. In Paragraph 6, The alignment of the above electrode sheets is, A step of preparing the atmospheric electrode sheet by adsorbing the leading edge of the atmospheric electrode sheet to the second adsorption plate of the second splicing unit; and An electrode splicing method comprising the step of advancing the second splicing unit toward the first splicing unit to align the leading edge of the waiting electrode sheet with the end of the driving electrode sheet with the lower end cut.

9. In Paragraph 6, The above tape supply is, A step of withdrawing a tape from a tape supply unit of a first splicing unit and adsorbing the tape to a second intermediate adsorption plate of a second splicing unit; and An electrode splicing method comprising the step of cutting the tape withdrawn while the tape is adsorbed.

10. In Paragraph 9, The temporary attachment of the above tape is, A step of advancing the second intermediate adsorption plate on which the tape is adsorbed toward the first splicing unit to position the tape at the joint portion of the driving electrode sheet and the standby electrode sheet; and An electrode splicing method comprising the step of attaching the second intermediate adsorption plate to the tape by pressing it, and then retracting the second intermediate adsorption plate.

11. In Paragraph 6, The pressure applied to the above tape is, A step of lowering a tape pressure roller installed on one side of a second splicing unit; A step of advancing the tape pressure roller onto the attached tape; A step of reciprocating the tape pressure roller along the longitudinal direction of the second splicing unit to apply pressure to the attached tape; and An electrode splicing method comprising the step of retracting the above tape pressure roller and then raising it to move it to its original position.

12. In Paragraph 6, A step of retracting the second splicing unit after applying pressure to the above tape; and An electrode splicing method further comprising the step of retracting the first splicing unit.

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