There is provided a technique of reducing the possibility of the occurrence of wrinkles in the process of bonding strip-shaped members to each other. A long strip-shaped first member is conveyed in a longitudinal direction of the first member. A width of a long strip-shaped second member in the shorter direction of the second member is larger than a width of the first member in a shorter direction of the first member. The second member is placed such that respective ends in a shorter direction of the second member are freed. The second member is bonded to the first member being conveyed, such that the shorter direction of the first member is aligned with the shorter direction of the second member and that respective ends in the shorter direction of the first member are placed between the respective ends in the shorter direction of the second member. The second member bonded to the first member is then conveyed along with the conveyed first member.

Each of a first rotary blade and a second rotary blade includes a rough surface portion and a smooth surface portion. The rough surface portion has a predetermined width from a blade edge at its circumferential edge portion and has an arithmetical mean roughness of greater than 0.5. The smooth surface portion is provided radially inward of the rough surface portion and has an arithmetical mean roughness less than the arithmetical mean roughness of the rough surface portion.

A wrinkle or misaligned winding caused in a separator roll is inhibited. In a slitting apparatus (6), a conveying direction of a first separator (12a) is changed to a first take-up roller (70U) side by a direction changing roller (68), the first separator is conveyed via a take-up assisting roller (69) which is provided between the direction changing roller and a first touch roller (81U) so as to shorten a roller-to-roller distance to the first touch roller, and the first separator which is being wound is pressed onto a take-up surface by the first touch roller.

A sheet-shaped electrode conveyance device (A) for conveying the sheet-shaped electrodes (1) to the stacking station is covered by the sealing walls (50). The inside of the sealing walls (50) is divided along the conveyance route of the sheet-shaped electrode (1) by the partitions (57, 58, 59, and 60) into the inside space regions (Z1, Z2, Z3, Z4, and Z5). Dry air is supplied to the inside space regions (Z1, Z2, Z3, Z4, Z5). If there is an abnormal sheet-shaped electrode (1) inside any of the inside space regions (Z1, Z2, Z3, Z4, Z5), the conveyor plates (20) other than the conveyor plate (20) carrying the abnormal sheet-shaped electrode (1) are retracted to the inside space regions other than the inside space region where the abnormal sheet-shaped electrode (1) is present.

An apparatus includes a control device for a first suction portion, a second suction portion, and a folding portion so that each time a separator is folded, a positive electrode and a negative electrode are alternately sandwiched between folded surfaces of the separator. The control device controls the at least one of the first suction portion and the second suction portion so that doping foil is bonded to one of a current collector, the positive electrode, and the negative electrode sucked and held by the at least one of the first suction portion and the second suction portion. The control device controls the at least one of the first suction portion and the second suction portion so that the one of the current collector, the positive electrode, and the negative electrode having the lithium metal foil bonded thereto is transported and sandwiched between a predetermined pair of the folded surfaces of the separator.

An electrode stack manufacturing apparatus comprising a plate conveyance device (A) provided with a plurality of conveyor plates (20) made to move along a conveyance route while spaced apart from each other. The conveyor plates (20) are successively loaded with sheet-shaped electrodes (1). The conveyor plates (20) are provided with clamps (21, 22, 23, 24) clamping the sheet-shaped electrodes (1) carried on the conveyor plates (20) on the conveyor plates (20) and holding the sheet-shaped electrodes (1) at the placement positions on the conveyor plates (20) during conveyance.

A winder includes a winding mechanism, a chamber, a vacuum pump, a conveying route and a product case. The winding mechanism winds a belt-shaped raw film around a winding core, the belt-shaped raw film being composed of a plurality of electrodes and a plurality of separating films. The chamber houses the winding mechanism. The vacuum pump sucks air into the chamber. The conveying route has a sealed outer space outside the chamber, an inner space of the chamber leading to the outer space in the conveyance route. The product case is disposed in the conveying route to house a plurality of winding products each formed by winding the raw film with use of the winding mechanism.

A good-quality slit separator having a small amount of fuzziness at a slit part thereof is to be obtained. The present invention includes: a step (S101) of conveying an original sheet (S); and a step (S102) of slitting the original sheet (S) by causing a plurality of slitting blades (72) to cut into the original sheet (S) such that tangent plane angles (.sub.3) in a tangent plane, on which a slitting position is in contact with the original sheet (S), are substantially identical with each other.

An electrode connection cause determination system includes a position measuring instrument. The position measuring instrument is configured to, when an electrode moves between an unwinder and a rewinder in a roll-to-roll state, acquire coordinate value data based on a longitudinal position of the electrode determined according to a rotation amount of the rewinder. The system includes a signal generator configured to generate a connection advance notice signal if the electrode includes a connecting portion corresponding to a cause event, a seam detector configured to detect a seam attached onto the electrode after the connection advance notice signal is generated, and a determination unit configured to, when the seam is detected within a predetermined distance from a first coordinate value of the electrode after the connection advance notice signal is generated, determine that a connection cause of an electrode connection by the seam corresponds to the cause event.

One aspect of the present disclosure relates to an electrode sheet cutting device and method, and more particularly, recognizes a shape of an electrode tab using a vision system and then identifies a cutting position to determine the cutting position of the electrode sheet, thereby improving the cutting accuracy of the electrode sheet.