KR-20260063303-A - ELECTRODE ASSEMBLY MANUFACTURING DEVICE AND BATTERY CELL

KR20260063303AKR 20260063303 AKR20260063303 AKR 20260063303AKR-20260063303-A

Abstract

An electrode assembly manufacturing device according to one embodiment of the present invention comprises: a main body frame having an insertion hole into which an electrode assembly is inserted; and a tape supply unit disposed along the inner circumference of the insertion hole and supplying a band-type adhesive tape having a size smaller than the size of the upper and lower sides of the electrode assembly, wherein in the tape supply unit, the adhesive tape is fixed in a relaxed state with a size larger than the size of the upper and lower sides of the electrode assembly, and when the electrode assembly is inserted into the electrode assembly insertion part, the tape supply unit supplies the adhesive tape in a direction toward the electrode assembly. A battery cell according to another embodiment of the present invention comprises: an electrode assembly comprising an electrode stack in which a positive electrode and a negative electrode are sequentially stacked with a separator interposed therebetween and are configured to be insulated from each other; and at least one adhesive tape that compresses and fixes the outer surface of the electrode assembly, wherein the at least one adhesive tape is a film having a plurality of holes formed therein.

Inventors

주현민
백주환
최병만
오정수
김기수

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (13)

A main body frame having an insertion hole into which an electrode assembly is inserted; and It includes a tape supply unit that supplies a band-type adhesive tape disposed along the inner surface of the insertion hole and having a size smaller than the size of the upper and lower sides of the electrode assembly. In the above tape supply unit, the adhesive tape is fixed in a relaxed state with a size larger than the upper and lower sides of the electrode assembly, and When the electrode assembly is inserted into the interior of the insertion hole, the tape supply unit supplies the adhesive tape in a direction toward the electrode assembly. Electrode assembly manufacturing device.
In paragraph 1, The above main body frame extends in the thickness direction of the electrode assembly, and The above electrode assembly is an electrode assembly manufacturing device that inserts the above electrode assembly into the insertion hole in the same direction as the length direction of the above electrode assembly.
In paragraph 1, An electrode assembly manufacturing device comprising a support member positioned at the lower part of the main body frame and supporting the main body frame.
In paragraph 1, The above tape supply unit is an electrode assembly manufacturing device that provides the adhesive tape to the outer surface of the electrode assembly as the electrode assembly moves along the longitudinal direction of the electrode assembly.
In paragraph 1, The above tape supply unit is an electrode assembly manufacturing device that provides the adhesive tape to the outer surface of the electrode assembly while the electrode assembly moves along the longitudinal direction of the electrode assembly.
In paragraph 1, The above adhesive tape is an electrode assembly manufacturing device that wraps around the upper and lower sides of the electrode assembly and compresses and fixes the upper and lower sides of the electrode assembly.
In paragraph 1, The above insertion hole is an electrode assembly manufacturing device having a size larger than the size of the upper and lower sides of the electrode assembly.
In paragraph 1, The above adhesive tape is an electrode assembly manufacturing device in which a film having a plurality of holes is formed.
In paragraph 1, The above tape supply unit supplies a plurality of adhesive tapes to the outer surface of the electrode assembly, and The electrode assembly manufacturing device wherein the plurality of adhesive tapes are each spaced apart from each other on the upper and lower sides of the electrode assembly.
An electrode assembly comprising an electrode stack in which an anode and a cathode are sequentially stacked with a separator interposed therebetween and configured to be insulated from each other; and It includes at least one adhesive tape that compresses and fixes the outer surface of the electrode assembly, and The above at least one adhesive tape is a battery cell, which is a film having a plurality of holes formed therein.
In Paragraph 10, The above at least one adhesive tape is a band-type battery cell having a size smaller than the size of the upper and lower sides of the electrode assembly.
In Paragraph 10, The above at least one adhesive tape is a battery cell that is spaced apart from each other on the upper and lower sides of the electrode assembly.
In Paragraph 11, A battery cell in which the size of the plurality of holes formed in each of the above-mentioned at least one adhesive tape is a size that facilitates the impregnation of an electrolyte.

Description

Electrode Assembly Manufacturing Device and Battery Cell The present invention relates to an electrode assembly manufacturing device, and more specifically, to an electrode assembly manufacturing device capable of ensuring the quality of a battery cell by minimizing damage caused when an adhesive tape is attached to the outer surface of an electrode assembly. In addition, the present invention relates to a battery cell, wherein a plurality of holes are formed in an adhesive tape attached to the outer surface of an electrode assembly, so that the electrode assembly can be sufficiently impregnated with an electrolyte regardless of the position of the adhesive tape. With the increasing technological development and demand for mobile devices, the demand for secondary batteries as an energy source is rapidly increasing. In particular, secondary batteries are attracting significant interest as an energy source not only for mobile devices such as mobile phones, digital cameras, laptops, and wearable devices, but also for power devices such as electric bicycles, electric vehicles, and hybrid electric vehicles. These secondary batteries are classified according to the shape of the battery case into cylindrical and prismatic batteries, in which the electrode assembly is embedded in a cylindrical or prismatic metal can, and pouch-type batteries, in which the electrode assembly is embedded in a pouch-type case made of an aluminum laminate sheet. Here, the electrode assembly embedded in the battery case is a power generation element capable of charging and discharging, consisting of a positive electrode, a negative electrode, and a separator structure interposed between the positive electrode and the negative electrode. It is classified into a jelly-roll type, which is wound with a separator interposed between long sheet-type positive and negative electrodes coated with active material, and a stack type, in which a plurality of positive and negative electrodes are sequentially stacked with a separator interposed between them. Among these, pouch-type batteries, in particular those with a structure in which a stacked or stacked/folded electrode assembly is embedded in a pouch-type battery case made of aluminum laminate sheets, are seeing a gradual increase in usage due to reasons such as low manufacturing costs, small weight, and easy deformation. In particular, in the case of conventional pouch-type batteries, the outer surface of a stack-type or stack/folding-type electrode assembly can be wrapped with adhesive tape to secure the battery cell. However, during the process of wrapping the outer surface of the electrode assembly with adhesive tape, interference may occur between the adhesive tape attachment device and the battery cell, which may result in the electrode being damaged or exposed to the outside. Accordingly, there is a need to develop an electrode assembly manufacturing device that can ensure the quality of the battery cell while minimizing damage caused when adhesive tape is attached to the outer surface of the electrode assembly. FIG. 1 is a perspective view showing an electrode assembly manufacturing apparatus according to the present embodiment. FIG. 2 is a perspective view showing an electrode assembly being inserted into the electrode assembly manufacturing device of FIG. 1. FIG. 3 is a perspective view showing an electrode assembly with adhesive tape attached in the electrode assembly manufacturing device of FIG. 1. FIG. 4 is a perspective view showing an electrode assembly with an adhesive tape attached in an electrode assembly manufacturing device according to another embodiment of the present invention. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings. Furthermore, throughout the specification, when a part is described as “comprising” a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectiona