A manufacturing method and a manufacturing equipment of an electrode assembly, a battery cell, a battery, and an electrical device. The manufacturing method of the electrode assembly specifically includes: providing roll materials including: a cathode plate roll, a separator roll, and an anode plate roll, in which, the separator roll includes a separator body and an early warning coating arranged on the separator body; the separator body has a head end and a tail end at two opposite ends along a winding direction thereof; and the early warning coating is configured to be spaced from the tail end by a first preset length; stacking and winding a cathode plate of the cathode plate roll, the separator body of the separator roll, and an anode plate of the anode plate roll; and detecting, in the winding process, whether the early warning coating is arranged on the separator body.

An electrode sheet rewinding apparatus for rewinding an electrode sheet includes a bobbin having a PET film wound therearound, a bobbin holder configured to hold the bobbin, a base plate located under the bobbin holder and configured to support the bobbin holder, a roller type touch roll configured to press an electrode sheet rewound around the bobbin above the bobbin to prevent meandering of the electrode sheet, a vertical plate located at one side of the base plate, the touch roll attached to the vertical plate, and an idle roller unit configured to form a tangential line to the electrode sheet rewound around the bobbin together with the touch roll. The idle roller unit includes an idle roller configured to maintain tension of the electrode sheet and to form a tangential line to the electrode sheet and two driving mechanisms configured to change the position of the idle roller.

Manufacturing machine (9) and method for manufacturing a cylindrical electrochemical cell (2) consisting of a spiral winding of a composite material (8) comprising at least two conductor bands (4, 6) and at least two separator bands (5, 7) overlapping one another. They are provided: a plurality of winding heads (13), each of which supports a holding device (14) which is configured to grab an end of the composite material (8) and to rotate on itself around a first rotation axis (15) so as to obtain a spiral winding of the composite material (8); a drum (11) which supports the winding heads (13) and which is mounted in a rotary manner so as to rotate with a continuous law of motion around a second rotation axis (12) in order to move the winding heads (13) along a processing path (P2); and a feeding unit (10) configured to feed the composite material (8) to the winding heads (13).

The disclosure relates to a method for producing a stack formed from multiple electrochemical cells, each of the electrochemical cells having a plurality of constituent components including at least one membrane component and a bipolar plate. The method includes orienting each constituent component of the constituent components on an edge of the constituent component, forming aligned components by feeding each constituent component of the constituent components oriented on the edge of the constituent component to a shaking boom, and forming the stack from the aligned components. The disclosure furthermore relates to a device for producing such a stack.

The application provides a winding device and a winding method. The winding device includes a feeding mechanism and at least two winding members, and the feeding mechanism is used to provide an electrode sheet and a separation membrane. The winding device is provided with a winding station and a non-winding station, and each of the winding members is movable between the winding station and the non-winding station. When one of the winding members winds the electrode sheet and the separation membrane for a preset amount of turns at the winding station, said one of the winding members moves from the winding station to the non-winding station. Said one of the winding members releases a part of the separation membrane wound on said one of the winding members when said another of the winding members winds the electrode sheet and the separation membrane.

An electrode stacking apparatus includes a stator with a horizontally installed main surface and multiple coils arranged under the main surface. A movable unit for stacking work includes a first mover that is movable above the main surface by magnetic levitation, an electrode holding unit, and a driving mechanism. The electrode holding unit is configured to press, from above, the base on top of the first mover and the sheet-type electrodes fed on the base's top surface. The driving mechanism drives the electrode holding unit by an external force acting thereon. The movable unit for operation work includes a second mover which can move above the main surface and an operation unit which operates the driving mechanism. A control unit is configured to control movements of the movable unit for stacking work and the movable unit for operation work by adjusting an amount of current flowed through the coils.

A notching system for an electrode sheet coated with slurry on a surface of a collector includes: an electrode unwinder from which the electrode sheet is unwound; a film unwinder from which a protective film stacked on the electrode sheet is unwound; a notching device configured to notch a non-coating portion, which is a portion that is not coated with the slurry on the electrode sheet, when provided in the state in which the protective film is stacked on the electrode sheet; and a rewinder configured to wind the notched electrode sheet.

Accordingly, the problem such as the cutting and tearing of the electrode sheet and the problem of causing the scratches due to the separation of the graphite powder from the surface of the electrode sheet may be solved.

A winding apparatus for secondary batteries includes a first clamp having a first contact portion to be in contact with a separator in a longitudinal direction, a second clamp having a second contact portion to be in contact with the separator in the longitudinal direction, the second contact portion being configured to be engaged with the first contact portion while the separator is therebetween, blades surrounding the first clamp and the second clamp, the blades being configured to allow the separator to be wound therearound, and a driver configured to move the first clamp and the second clamp toward each other and away from each other.

A sheet takeout method includes: pressing, when a restraint device is in a restrained state, a transfer plate which is in a horizontal state to pickup and hold a topmost sheet member; pressing the sheet members by an inelastic deformation part of the transfer plate while setting the restraint device to be in a non-restrained state and setting the transfer plate to be in an elastically deformed state; inserting a restraining blade into a space formed between the topmost sheet member and its underlying sheet member and setting the restraint device to be in the restrained state again; returning the transfer plate that has picked up and held the topmost sheet member to a horizontal state while retracting the transfer place upward; and transferring the topmost sheet member picked up and held by the transfer plate to a receiving holder.

An on-line detection system for defects of an MEA is provided. The detection system includes a workbench, two connecting rods are arranged inside the workbench, two ends of the two connecting rods are both connected to two side walls of the workbench by means of bearings, and conveying rollers are fixedly arranged outside the two connecting rods in a sleeving manner. One side of the workbench is fixedly provided with a first electric motor, and an output end of the first electric motor is fixedly connected to one of the connecting rods. Belt pulleys are fixedly arranged outside the two connecting rods in a sleeving manner, and a belt is arranged outside the two belt pulleys in a sleeving manner. A hollow roller is arranged on an inner side of the workbench, and a plurality of exhaust holes are provided in a top of the hollow roller.