Abstract: The present application provides a coating die, a coating device and a coating method. The coating die includes a first die and a second die, the first die is connected to the second die and enclosed to form a slot to output slurry; the first die includes a die body, a lip portion and a lip adjustment assembly; the lip portion is connected to the die body and is located at a discharge end of the slot; the lip adjustment assembly is used for adjusting a temperature of the lip portion to control a deformation of the lip portion. The solution of the present application can improve the consistency of coating.

Abstract: A rolling apparatus includes a roller assembly and a power source. The roller assembly includes four rollers, where the four rollers (110a) are arranged side by side in pairs along a first direction and a second direction intersected with each other, and two rollers arranged side by side define a roll gap therebetween. The power source drives two rollers arranged diagonally to rotate in a same direction around their axes. Two roll gaps defined by one of the two rollers arranged diagonally and the two rollers arranged side by side therewith are used for rolling a first electrode plate twice, and two roll gaps defined by the other one of the two rollers arranged diagonally and the two rollers arranged side by side therewith are used for rolling a second electrode plate twice. In the rolling apparatus, the four rollers form strip moving routes.

Abstract: An embodiment of the present application provide an electrode assembly, a battery cell, a battery, and an electrode assembly manufacturing equipment and method. Among that, the electrode assembly includes a negative electrode plate and a positive electrode plate which form a bending region. The positive electrode plate includes bending portions located in the bending region, the bending portion includes a positive electrode current collecting layer and a positive active substance layer, and at least one side surface of the positive electrode current collecting layer is provided with the positive active substance layer in a thickness direction of the positive electrode plate. At least one positive active substance layer is provided with the barrier layer, at least a part of the barrier layer is intercalated in the positive active substance layer provided with the barrier layer, and coats at least a part of particles in the positive active substance layer.

Abstract: A rolling apparatus includes a roller assembly and a power source. The roller assembly includes four rollers, where the four rollers (110a) are arranged side by side in pairs along a first direction and a second direction intersected with each other, and two rollers arranged side by side define a roll gap therebetween. The power source drives two rollers arranged diagonally to rotate in a same direction around their axes. Two roll gaps defined by one of the two rollers arranged diagonally and the two rollers arranged side by side therewith are used for rolling a first electrode plate twice, and two roll gaps defined by the other one of the two rollers arranged diagonally and the two rollers arranged side by side therewith are used for rolling a second electrode plate twice. In the rolling apparatus, the four rollers form strip moving routes.

Abstract: Provided are a rolling apparatus and a processing device, which are used for rolling an electrode plate. The rolling apparatus includes a first roller and a second roller, where the first roller and the second roller are disposed at two sides of the electrode plate in a thickness direction of the electrode plate. The first roller is provided with a plurality of recessed portions, the electrode plate includes a plurality of insulation coating layer regions and a plurality of tabs, and in a projection of the electrode plate in the thickness direction, at least part of a projection of the insulation coating layer region and a projection of the tab are located within a projection of the recessed portion. The rollers deflect under a large rolling pressure.

Abstract: Provided are a coating apparatus and a coating system, where the coating apparatus includes: a coating module, the coating module including a coating roller and a coating die, where the coating roller is configured to drive, when rotating, a substrate to move toward the coating die, and the coating die is configured to apply a coating onto the substrate; an error acquisition module having a predetermined distance to the coating roller and configured to acquire a circular run-out error of rotation of the coating roller and transmit the circular run-out error to a linkage module; and the linkage module configured to adjust position of the coating die in real time according to the circular run-out error transmitted to the linkage module, so as to keep a distance between the coating roller and the coating die unchanged.

Abstract: Provided are a rolling apparatus and a processing device, which are used for rolling an electrode plate. The rolling apparatus includes a first roller and a second roller, where the first roller and the second roller are disposed at two sides of the electrode plate in a thickness direction of the electrode plate. The first roller is provided with a plurality of recessed portions, the electrode plate includes a plurality of insulation coating layer regions and a plurality of tabs, and in a projection of the electrode plate in the thickness direction, at least part of a projection of the insulation coating layer region and a projection of the tab are located within a projection of the recessed portion. The rollers deflect under a large rolling pressure.

Abstract: Provided are a coating apparatus and a coating system, where the coating apparatus includes: a coating module, the coating module including a coating roller and a coating die, where the coating roller is configured to drive, when rotating, a substrate to move toward the coating die, and the coating die is configured to apply a coating onto the substrate; an error acquisition module having a predetermined distance to the coating roller and configured to acquire a circular run-out error of rotation of the coating roller and transmit the circular run-out error to a linkage module; and the linkage module configured to adjust position of the coating die in real time according to the circular run-out error transmitted to the linkage module, so as to keep a distance between the coating roller and the coating die unchanged.

Abstract: An embodiment of the present application provide an electrode assembly, a battery cell, a battery, and an electrode assembly manufacturing equipment and method. Among that, the electrode assembly includes a negative electrode plate and a positive electrode plate which form a bending region. The positive electrode plate includes bending portions located in the bending region, the bending portion includes a positive electrode current collecting layer and a positive active substance layer, and at least one side surface of the positive electrode current collecting layer is provided with the positive active substance layer in a thickness direction of the positive electrode plate. At least one positive active substance layer is provided with the barrier layer, at least a part of the barrier layer is intercalated in the positive active substance layer provided with the barrier layer, and coats at least a part of particles in the positive active substance layer.