KR-20260067951-A - CELL STACKING MACHINE

KR20260067951AKR 20260067951 AKR20260067951 AKR 20260067951AKR-20260067951-A

Abstract

The present invention relates to a cell stacking device comprising: a driving unit; and a mandrel unit coupled to the driving unit and pressurizing a cell stack stacked on a stage, wherein the mandrel unit comprises a membrane guide that guides a membrane of the cell stack and a plate grip spaced apart from the membrane guide and fixing a plate of the cell stack.

Inventors

김흥기
김완수
김경식
김재원
문현규
박림정
강성무

Assignees

주식회사 필에너지

Dates

Publication Date: 20260513
Application Date: 20250321
Priority Date: 20241106

Claims (12)

Driving unit; and It includes a mandrel part coupled to the above-mentioned drive unit and pressurizing a cell stack stacked on a stage, The above mandrel portion is a membrane guide that guides the membrane of the cell stack; and A cell stacking device characterized by including a plate grip that is spaced apart from the above-mentioned separator guide and fixes the electrode plate of the cell stack.
In Article 1, The above separator guide is formed to protrude in the direction of the cell stack, and A cell stacking device characterized by having inclined portions formed on each side of the above-mentioned membrane guide to reduce the contact area with the membrane.
In Paragraph 2, The above inclined portion is a first inclined portion formed on the outer side of the membrane guide; and It includes a second inclined portion formed on the inner side of the above-mentioned separator guide, and A cell stacking device characterized in that the inclination angle of the first inclined section is greater than the inclination angle of the second inclined section.
In Paragraph 3, A cell stacking device characterized by the above-mentioned inclined portion including a third inclined portion formed on the front side of the separator guide.
In Article 1, The above electrode plate grip is formed in a flat plate shape, and A cell stacking device characterized by having a fourth inclined portion formed on the circumferential surface of the above-mentioned electrode plate grip.
In Article 1, A cell stacking device characterized in that the above-mentioned separator guide is formed higher than the above-mentioned electrode grip.
In Article 1, The above driving unit is a mandrel mounting part on which the mandrel part is mounted; and A cell stacking device characterized by including a moving operating part that moves the mandrel mounting part in the direction of the cell stack.
In Article 7, The above mandrel mounting part is a fixed block; and A cell stacking device characterized by including a variable block provided on the upper part of the fixed block and coupled to the mandrel part, and movable in the longitudinal direction of the cell stack on the upper part of the fixed block.
In Paragraph 8, The above fixed block and the above variable block are joined by a fastening part, The above fastening portion includes a fastening hole formed in the fixed block and the variable block; and It includes a fastening bolt coupled to the above fastening hole, and A cell stacking device characterized in that the fastening hole of the above variable block is formed as an elongated hole.
In Paragraph 8, The above-mentioned moving operating part is a frame; A guide frame provided in the above frame; A movable block configured to be slidably movable on the above guide frame and on which the mandrel mounting part is mounted; and A cell stacking device characterized by including a driving member that provides a driving force to cause the above-mentioned moving block to slide along the above-mentioned guide frame.
In Article 10, A cell stacking device characterized in that the above mandrel mounting portion moves diagonally when moved toward the cell stack side by the above driving member.
In Paragraph 11, The above guide frame is positioned at a set angle of inclination toward the inner direction of the cell stack, and The above-mentioned moving block is a support block slidably coupled to the guide frame; and A cell stacking device characterized by including a rotating block coupled to the support block and positioned at an angle inclined outward from the support block so as to be orthogonal to the cell stack.

Description

Cell Stacking Machine The present invention relates to a cell stacking device. With the increasing technological development and demand for mobile devices such as mobile phones, laptops, camcorders, and digital cameras, technologies related to rechargeable secondary batteries are becoming more active. Furthermore, as secondary batteries serve as an alternative energy source to fossil fuels that cause air pollutants and are being applied to electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs), the need for secondary battery development is steadily increasing. Such secondary batteries include an electrode assembly in which electrodes and separators are alternately stacked, and a case that accommodates the electrode assembly. The electrode assembly is a power generation element having a stacked structure in which a separator is interposed between a positive electrode and a negative electrode. It is classified into a jelly-roll type, which is wound with a separator interposed between a long sheet-type positive electrode and a negative electrode coated with an active material, and a stack type, in which a plurality of positive electrodes and negative electrodes of a predetermined size are sequentially stacked with a separator interposed between them. As an advanced electrode assembly structure that is a hybrid form of jelly-roll and stack types, a stack/folding type electrode assembly has been developed in which a mono-cell with an anode/separator/cathode structure of a certain unit size or a bi-cell with an anode(cathode)/separator/cathode(anode)/separator/anode(cathode) structure is folded using a long continuous separator film. At this time, a cell stacking device is used as equipment for stacking cell components so that a separator is placed between the electrode plates. Recently, there has been a growing need for a device to reduce process defects by more stably fixing electrode plates in the production of wide electrode assemblies. The background technology of the present invention is disclosed in Korean Published Patent No. 10-2023-0096885 (Registered June 30, 2023; Title of Invention: Electrode Assembly and Method for Manufacturing the Same). FIG. 1 is a perspective view schematically showing a cell stacking device according to one embodiment of the present invention. FIG. 2 is a side view schematically illustrating a cell stacking device according to one embodiment of the present invention. FIG. 3 is a plan view schematically showing a cell stacking device according to one embodiment of the present invention. FIG. 4 is an enlarged view of a key part showing the mandrel portion of a cell stacking device according to one embodiment of the present invention. FIG. 5 is a plan view showing the mandrel portion of a cell stacking device according to one embodiment of the present invention. FIG. 6 is a schematic diagram showing the fixation of electrode plates by the mandrel portion of a cell stacking device according to one embodiment of the present invention. FIG. 7 is a diagram illustrating the diagonal movement of the mandrel portion of a cell stacking device according to one embodiment of the present invention. FIG. 8 is a side view showing the operation of the mandrel portion of a cell stacking device according to one embodiment of the present invention. FIG. 9 is a plan view showing the operation of the mandrel part of a cell stacking device according to one embodiment of the present invention. Hereinafter, a preferred embodiment of a cell stacking device according to an embodiment of the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described below are defined in consideration of their functions in the present invention, and these may vary depending on the intent or practice of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification. FIG. 1 is a perspective view schematically showing a cell stacking device according to one embodiment of the present invention, FIG. 2 is a side view schematically showing a cell stacking device according to one embodiment of the present invention, and FIG. 3 is a plan view schematically showing a cell stacking device according to one embodiment of the present invention. Referring to FIGS. 1 to 3, the cell stacking device (10) according to the present embodiment may include a driving unit (100) and a mandrel unit (200). The driving unit (100) can function as a configuration that moves the mandrel (200) horizontally toward the cell stack (20). The driving unit (100) is configured to move the mandrel (200) to perform fixing of the electrode plate (22) and guiding of the separator (24) by the mandrel (200), and a detailed explanation will be provided later.