There is provided a multi-slot die coater including a manifold for a uniform flow of an electrode active material slurry without stagnation. The multi-slot die coater of the present disclosure includes a first manifold in which a first coating solution is received and a second manifold in which a second coating solution is received. The first manifold is a chamber of an inwardly recessed shape, and includes a first surface and a second surface having different angles to a lower slot at a location close to the lower slot, and the angle of the first surface closest to the lower slot is formed at a level of 30˜70% of the second surface following the first surface.

Methods and apparatuses for applying coatings on a moving web are provided. A slot die including a concave die lip coating surface and a back-up roll engage with each other. The back-up roll has a deformable inner layer with a surface thereof covered by a deformable outer layer. The slot die and the flexible web at a contacting area are impressed into the back-up roll with an engagement depth D, which enables formation of a coating having a substantially uniform thickness.

There is provided a multi-slot die coater including a manifold for a uniform flow of an electrode active material slurry without stagnation. The multi-slot die coater of the present disclosure includes a first manifold in which a first coating solution is received and a second manifold in which a second coating solution is received. The first manifold is a chamber of an inwardly recessed shape, and includes a first surface and a second surface having different angles to a lower slot at a location close to the lower slot, and the angle of the first surface closest to the lower slot is formed at a level of 30˜70% of the second surface following the first surface.

The present disclosure provides a multi-slot die coater which fastens a contact surface between die blocks using bolts whose position is set to minimize the loading deviation. According to the present disclosure, it is possible to reduce deformation or twist of the die block having structural vulnerability, and thereby uniformly form a coating layer, in particular, an electrode active material layer at a desired thickness, and it is possible to coat at least two types of electrode active material slurries at the same time, thereby achieving high performance and productivity.

A method for applying a predetermined pattern of material onto an elongate tubular substrate includes securing a first portion of an elongate tube having a non-circular outer perimeter to an engagement member configured to be rotated by a first motor, such that the elongate tube can be rotated in unison with the engagement member, operating the first motor to rotate the elongate tube, operating a second motor of to change the relative displacement between the elongate tube and a dispensing conduit along a longitudinal axis of the elongate tube, and expelling a conductive adhesive from a fluid dispenser through the dispensing conduit to form a predetermined pattern of the conductive adhesive on a surface of the elongate tube, the predetermined pattern of the conductive adhesive covering at least 180 degrees of the surface along the non-circular outer perimeter over a width of at least two millimeters along the longitudinal axis.

A method of coating an active material for a secondary battery according to one embodiment of the present disclosure is a method of coating an active material on an electrode current collector of a secondary battery, the method comprising the steps of: disposing a guide member on each of the left and right sides based on a moving direction of the electrode current collector, and coating the active material onto the electrode current collector between the two guide members.

A coating extrusion head may include an extrusion head body and at least one pressure regulating assembly. The extrusion head body may be provided with a coating slot and an accommodating cavity which may be in communication with each other. The at least one pressure regulating assembly may be arranged in the accommodating cavity, and the pressure regulating assembly may be configured to be expandable in a first direction perpendicular to the coating slot.

A coating shim and a coating device, for applying a first slurry and a second slurry to an object to be coated are provided. The coating shim includes: a first flow channel for applying the first slurry to the object to be coated to form a first coating layer; and a second flow channel for applying the second slurry to the object to be coated to form a second coating layer. The first flow channel has a first slurry outlet at a first end face of the shim facing the object to be coated, the second flow channel has a second slurry outlet at the first end face, and the first slurry outlet and the second slurry outlet are configured to partially overlap in a thickness direction of the shim, such that the first coating layer and the second coating layer partially overlap in the thickness direction of the shim.

The present disclosure relates to a slot die coating apparatus for coating an electrode active material slurry onto an electrode collector, the slot die coating apparatus including a coating roller, a die comprising a lower discharge opening, through which a first electrode active material slurry is discharged, and an upper die located on the upper side of the lower die and having an upper discharge opening, through which a second electrode active material slurry is discharged, and an upper air vent may be installed in the upper die and a lower air vent may be installed in the lower die.

Methods and apparatuses for applying coatings (9) on a moving web (3) are provided. A slot die (20) and a back-up roll (11) engage with each other. The back-up roll has a deformable inner layer (12) with a surface thereof covered by a deformable outer layer (14). The slot die and the flexible web at a contacting area are impressed into the back-up roll with an engagement depth D, which enables formation of a coating having a substantially uniform thickness.