KR-20260066420-A - SEPARATOR REMOVAL DEVAICE AND METHOD OF REMOVING SEPARATOR

KR20260066420AKR 20260066420 AKR20260066420 AKR 20260066420AKR-20260066420-A

Abstract

The present invention relates to a device for removing a separator from a waste battery and a method for removing a separator. The method for removing a separator relates to a method for removing a separator from a waste battery crushed material. It comprises a first separator sorting step for sorting separators from the waste battery crushed material by controlling the wind speed to 10.0 m/sec or less, and a second separator sorting step for further sorting separators having a long axis length of 100 mm or more among the waste battery crushed material that has undergone the first separator sorting step.

Inventors

김학순
박중길
이주승
박종력
김민성
김민재

Assignees

포스코홀딩스 주식회사

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (17)

A separator removal device for removing a separator from shredded waste battery material from a waste battery, A first separator sorting unit that sorts separators from the above-mentioned waste battery crushed material by wind sorting at 10.0 m/sec or less; A second separator sorting unit that further sorts separators having a long axis length of 100 mm or more 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, A membrane removal device in which the wind speed of the first membrane sorting section is performed in the range of 1.6 to 2.5 m/sec.
In Article 2, A separator removal device including a crushing unit for crushing the above-mentioned waste battery.
In Article 1, The above crushing unit is a separator removal device in which the average length of the long axis of the waste battery crushed material is 40 to 80 mm.
In Paragraph 4, The above magnetic separation unit is a membrane removal device performed at 1000 Gauss or more.
In Article 1, The second separator sorting unit includes a particle size sorting unit for sorting the particle size of the crushed waste battery material, and The above particle size sorting unit is a membrane removal device that performs sorting based on intervals of 90 to 130 mm.
In Article 1, It is positioned at the front of the first membrane sorting section mentioned above, and A separator removal device comprising a dispersion unit for dispersing the above-mentioned waste battery crushed material.
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. A first separator sorting step for sorting separators from the above-mentioned waste battery crushed material by controlling the wind speed to 10.0 m/sec or less; and A method for removing separators, comprising a second separator sorting step for additionally sorting separators having a long axis length of 100 mm or more among the crushed waste batteries that have undergone the first separator sorting step.
In Article 8, A membrane removal method in which the wind speed in the first membrane screening step is performed in the range of 1.6 to 2.5 m/sec.
In Article 8, Prior to the first membrane screening step mentioned above, It includes the step of crushing the above waste battery, The step of crushing the waste battery above is a separator removal method performed under conditions where the oxygen content is 6 volume% or less.
In Article 8, Prior to the first membrane screening step mentioned above, It includes the step of crushing the above waste battery, A method for removing a separator in which the step of crushing the waste battery is performed such that the average length of the long axis of the crushed waste battery is 40 to 80 mm.
In Article 8, After the second membrane screening step mentioned above, A method for removing a separator comprising a magnetic separation step for separating a magnetic material from the above-mentioned waste battery crushed material.
In Article 12, The above magnetic separation step is a membrane removal method performed at a magnetic force of 1000 Gauss or more.
In Article 8, The step of sorting the second separation membrane includes a particle size sorting step, and The above particle size sorting step is a method for removing a separator that sorts the waste battery crushed material based on a spacing of 90 to 130 mm.
In Article 1, Before performing the above first membrane screening step, A method for removing a separator comprising the step of dispersing the above-mentioned crushed waste battery material.
In Article 15, A method for removing a separator in which the step of dispersing the above-mentioned waste battery crushed material is a step of inducing collision with the above-mentioned waste battery crushed material.
In Article 8, Between the second membrane separation step and the magnetic separation step, A method for removing a separator comprising the step of dropping the above-mentioned waste battery crushed material.

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 separation membrane 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