KR-20260066419-A - SEPARATOR REMOVAL DEVAICE AND METHOD OF REMOVING SEPARATOR

KR20260066419AKR 20260066419 AKR20260066419 AKR 20260066419AKR-20260066419-A

Abstract

The present invention relates to a separator removal device and a separator removal method, wherein the separator removal device is for removing a separator from crushed waste battery material obtained from a waste battery, and comprises a first separator sorting unit for separating a separator from the crushed waste battery material, a second separator sorting unit for further sorting a separator from the crushed waste battery material separated from the first separator sorting unit, and a magnetic sorting unit for separating a magnetic material from the crushed waste battery material separated from the second separator sorting unit.

Inventors

김학순
박중길
이주승
박종력
김민성
김민재

Assignees

포스코홀딩스 주식회사

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (15)

A separator removal device for removing a separator from shredded waste battery material from a waste battery, A first separator sorting unit that separates the separator from the above-mentioned waste battery crushed material and sorts it by wind power; A second separator sorting unit for further sorting separators from the waste battery crushed material separated from the first separator sorting unit; and A separator removal device comprising a magnetic separation unit for separating magnetic materials from the waste battery crushed material separated from the second separator separation unit.
In Article 1, The above separator removal device includes a receiving portion into which the waste battery crushed material is fed, and The above receiving section includes an input section into which the first separator sorting section receives the crushed waste battery material, and The above input section is a membrane removal device including a layered structure.
In Article 2, A plurality of structures within the above-mentioned layered structure are a membrane removal device having an inclination angle of 20 to 50°.
In Article 1, The second membrane sorting unit is positioned below the first membrane sorting unit, and A membrane removal device comprising a second membrane recovery section including a plurality of column sections.
In Paragraph 4, A separator removal device in which the plurality of pillars are arranged in at least two rows in at least one of a first direction in which the waste battery crushed material falls and a second direction perpendicular to the first direction.
In Paragraph 4, A membrane removal device satisfying a length ratio (C/B) of the thickness (C) of the second membrane recovery section to the spacing (B) between the plurality of pillar sections of the above-mentioned plurality of pillar sections of 0.3 to 1.0.
In Paragraph 4, It is disposed between the second membrane separation unit and the magnetic separation unit, and A separator removal device comprising a drop section into which the battery crushed material selected from the second separator selection section falls.
In Article 7, A membrane removal device in which the cross-sectional diameter of the above-mentioned drop section narrows toward the center of the above-mentioned drop section.
In Article 1, A membrane removal device in which the first membrane sorting unit, the second membrane sorting unit, and the magnetic sorting unit are arranged vertically.
In Article 1, The above-mentioned first membrane sorting unit is a membrane removal device that performs at a wind speed in the range of 1.6 to 2.5 m/sec.
The present invention relates to a method for removing a separator from crushed waste battery material, wherein the separator is removed from the waste battery. An input step of inputting the above-mentioned crushed waste battery material into a receiving section via an input section including a layered structure; A first separator sorting step for separating the separator from the above-mentioned waste battery crushed material and wind sorting; A second separator sorting step for further sorting separators from the waste battery crushed material that has undergone the first separator sorting step; and A method for removing a separator, comprising a magnetic separation step for separating a magnetic material from the waste battery crushed material separated from the second separator separation unit.
In Article 11, A method for removing a separation membrane in which a plurality of structures within the above-mentioned layered structure have an inclination angle of 20 to 50°.
In Article 11, The above second membrane screening step is, A method for removing a membrane by further separating the membrane after additionally screening the above membrane and passing it through a plurality of pillar sections.
In Article 11, Between the second membrane separation step and the magnetic separation step A method for removing a separator comprising the step of dropping the battery crushed material selected from the second separator selection step.
In Article 11, The above-mentioned first membrane screening step is a membrane removal method performed in a wind speed range of 1.6 to 2.5 m/sec.

Description

Separator Removal Device and Method of Removing Separator The present invention relates to waste battery recycling, and more specifically to a separator removal device for removing a separator from a waste battery and a method for removing a separator. Battery demand is rapidly increasing as they are widely used not only in electronic devices such as smartphones and mobile devices but also in electric vehicles. The demand for these batteries is expected to rise further as the demand for electric vehicles increases as the next-generation mode of transportation. Since the aforementioned electric vehicle requires a battery with a large electrical capacity, it is installed and used in the vehicle in units of multiple battery cells, modules composed of multiple battery cells, and packs composed of multiple modules. As the usage of the electric vehicle increases rapidly, the amount of waste generated from batteries used in the electric vehicle is also increasing. The lithium secondary battery described above comprises copper (Cu) and aluminum (Al) used as a current collector, lithium (Li), nickel (Ni), cobalt (Co), and manganese (Mn) containing oxides constituting the cathode, graphite constituting the anode, a separator separating the cathode and the anode, and an electrolyte injected into the separator. For the recycling of the aforementioned lithium secondary batteries, processes are utilized in which black powder, consisting of a mixture of cathode and anode materials, is formed into an oxide form through crushing and sorting, followed by the recovery of valuable metals, recovery in the form of black alloy, or the direct recovery of lithium and valuable metals. However, when recovering valuable metals, separator components cause environmental pollution during subsequent processes. These separator components also pose a problem by reducing heat transfer efficiency during the reduction process. Furthermore, these separator components can cause process load through coatings such as organic materials. Accordingly, it is desirable to remove these separator components through pre-separation before subsequent processes. To solve this problem, a method is being used to recover only the separator by immersing crushed waste batteries in water under wet conditions, utilizing the hydrophobic characteristics of separators composed of polymers such as PE (Polyethylene). However, the above method has the problem of causing water pollution when the crushed waste batteries are introduced into water. FIG. 1 is a schematic diagram of a membrane removal device according to one embodiment of the present invention. FIG. 2 is an enlarged plan view of a second membrane separator according to one embodiment of the present invention. Figure 3 is a cross-sectional view taken along the AA' direction of the second membrane separator of Figure 2. FIG. 4 is an enlarged view of a membrane removal device including an input section according to one embodiment of the present invention. Figure 5 is a cross-sectional view taken along the DD' direction of Figure 4. FIG. 6 is a flowchart of a method for removing a separator according to one embodiment of the present invention. Figure 7 is a photograph of a separated membrane according to an embodiment and a comparative example of the present invention. Terms such as first, second, and third are used to describe various parts, components, regions, layers, and/or sections, but are not limited thereto. These terms are used solely to distinguish one part, component, region, layer, or section from another part, component, region, layer, or section. Accordingly, the first part, component, region, layer, or section described below may be referred to as the second part, component, region, layer, or section without departing from the scope of the present invention. The technical terms used herein are for the reference of specific embodiments only and are not intended to limit the invention. The singular forms used herein include plural forms unless phrases clearly indicate otherwise. As used in the specification, the meaning of "comprising" specifies certain characteristics, areas, integers, steps, actions, elements, and/or components, and does not exclude the presence or addition of other characteristics, areas, integers, steps, actions, elements, and/or components. When it is stated that one part is "above" or "on" another part, it may be directly above or on the other part, or other parts may be involved in between. In contrast, when it is stated that one part is "directly above" another part, no other parts are interposed in between. Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms defined in commonly used dictionaries are further interpreted to have meanings consistent with relevant technical literature and the present disclosure, and are not inter