CN-122003750-A - Battery cell production device, battery cell produced by using same, battery pack including battery cell, and vehicle

Abstract

Disclosed are a battery cell production apparatus, a battery cell produced using the battery cell production apparatus, and a battery pack and a vehicle including the battery cell. According to one embodiment of the present invention, a battery cell manufacturing apparatus for manufacturing a battery cell by using an electrode foil having a coating layer formed thereon includes an electrode generating member for generating the electrode foil, a winding member for winding an electrode generated using the electrode generating member into a roll form, and a folding member for folding the electrode.

Inventors

• LU HELIN
• SONG XIANMIN

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260508

Application Date

20250820

Priority Date

20240826

Claims (17)

1. 1. A battery cell production apparatus for producing a battery cell using a coated electrode foil, the battery cell production apparatus comprising: an electrode forming unit that forms an electrode using the electrode foil; a winding unit that winds the electrode formed by the electrode forming unit into a roll core form, and And a folding unit that folds the electrode.
2. 2. The battery cell production apparatus according to claim 1, Wherein the electrode forming unit includes: a transfer member that transfers the electrode foil, and A fold line forming member that forms a fold line on the electrode foil conveyed by the conveying member.
3. 3. The battery cell production apparatus according to claim 2, Wherein the fold line forming member is configured to press the electrode foil.
4. 4. The battery cell production apparatus according to claim 3, Wherein the fold line forming member includes: a pressing portion which is in contact with the electrode foil to form a folding line on the electrode foil, and And a supporting portion coupled to the pressing portion to support the pressing portion.
5. 5. The battery cell production apparatus according to claim 4, Wherein the pressing portion is formed such that the size of the cross-sectional area thereof decreases as proceeding toward one end.
6. 6. The battery cell production apparatus according to claim 5, Wherein the pressing portion has one end formed to be pointed.
7. 7. The battery cell production apparatus according to claim 2, Wherein the electrode includes a coated portion on the surface of which the coating layer is formed and an uncoated portion on which the coating layer is not formed, and Wherein the fold line forming member forms the fold line on the uncoated portion.
8. 8. The battery cell production apparatus according to claim 4, Wherein the pressing portions are provided as a pair of pressing portions, and Wherein the pair of pressing portions are each provided on both sides of the electrode foil.
9. 9. The battery cell production apparatus according to claim 3, comprising: A fold line re-pressing member that is spaced apart from the winding unit and re-presses the fold line along the fold line.
10. 10. The battery cell production apparatus according to claim 9, Wherein the fold line re-pressing member re-presses the fold line while the winding unit winds the electrode and the separator into a roll core-shaped electrode assembly.
11. 11. The battery cell production apparatus according to claim 2, Wherein the folding unit folds the electrode along the folding line.
12. 12. The battery cell production apparatus according to claim 11, Wherein the folding unit includes a plurality of unit pressing portions, and Wherein the plurality of unit pressing portions press the electrode while moving from the outside toward the center of the jellyroll electrode.
13. 13. The battery cell production apparatus of claim 12, Wherein the plurality of unit pressing portions simultaneously or sequentially press the electrodes.
14. 14. The battery cell production apparatus of claim 12, Wherein the plurality of unit pressing portions have the same shape and size, and press the electrodes at the same speed.
15. 15. A battery cell produced using the battery cell production apparatus according to any one of claims 1 to 14.
16. 16. A battery pack comprising at least one battery cell according to claim 15.
17. 17. A vehicle comprising at least one battery cell according to claim 15.

Description

Battery cell production device, battery cell produced by using same, battery pack including battery cell, and vehicle Technical Field The present application is based on and claims priority from korean patent application No. 10-2024-014152, filed on the korean intellectual property department at month 26 of 2024, the disclosure of which is incorporated herein by reference in its entirety. The present disclosure relates to a battery cell production apparatus and a battery cell produced using the same, and a battery pack and a vehicle including the battery cell, and more particularly, to a battery cell production apparatus and a battery cell produced using the same, which are capable of promoting electrode folding, and a battery pack and a vehicle including the battery cell. Background In general, a secondary battery refers to a battery (such as a lithium ion battery, a lithium polymer battery, a nickel cadmium battery, a nickel hydrogen battery, a nickel zinc battery, etc.) that can be repeatedly charged and discharged. The secondary battery may be classified into a cylindrical battery cell in which an electrode assembly is embedded in a cylindrical or square metal can and a pouch-shaped battery cell in which an electrode assembly is embedded in a pouch-shaped case made of an aluminum laminate sheet, according to the shape of the battery case. Also, an electrode (positive electrode or negative electrode) of the secondary battery may include a coated portion in which a coating layer is formed by compressing an electrode mixture on a surface of an electrode foil, and an uncoated portion in which no coating layer is formed. A conventional cylindrical battery cell includes applying a positive or negative electrode active material to an electrode, then slitting (cutting the electrode), and then pressing an end portion (e.g., an uncoated portion) of the slit electrode to bend it. However, in the process of pressing the end portions of the cut electrodes, the end portions of the cut electrodes are excessively crushed to cause electrode damage, which has a problem of adversely affecting the overall quality of the battery cells. Disclosure of Invention Technical problem The present disclosure is designed to solve the above-described problems, and therefore the present disclosure is directed to providing a battery cell production apparatus capable of promoting electrode folding by forming a preset line on an electrode, and a battery cell produced using the same, and a battery pack and a vehicle including the battery cell. In addition, the present disclosure is directed to providing a battery cell manufacturing apparatus capable of preventing damage to an electrode during electrode folding and thus improving the quality of a battery cell, and a battery cell manufactured using the same, and a battery pack and a vehicle including the battery cell. However, technical problems to be solved by the present disclosure are not limited to the above-described problems, and other problems not mentioned herein may be clearly understood by those skilled in the art from the following description of the present disclosure. Technical proposal According to an aspect of the present disclosure, there may be provided a battery cell production apparatus that produces a battery cell using an electrode foil formed with a coating layer, the battery cell production apparatus including an electrode forming unit that forms an electrode using the electrode foil, a winding unit that winds the electrode formed by the electrode forming unit into a roll form, and a folding unit that folds the electrode. In one embodiment, the electrode forming unit may include a transfer member that transfers the electrode foil, and a fold line forming member that forms a fold line on the electrode foil transferred by the transfer member. In one embodiment, the fold line forming member may be configured to press the electrode foil. In one embodiment, the fold line forming member may include a pressing portion that contacts the electrode foil to form a fold line on the electrode foil, and a supporting portion coupled to the pressing portion to support the pressing portion. In one embodiment, the pressing portion may be formed such that the size of the cross-sectional area thereof decreases as proceeding toward one end. In one embodiment, one end of the pressing portion may be formed to be pointed. In one embodiment, the electrode may include a coated portion on the surface of which the coating layer is formed and an uncoated portion on which the coating layer is not formed, and the fold line forming member may form the fold line on the uncoated portion. In one embodiment, the pressing portions may be provided in a pair, and a pair of the pressing portions may be provided on both sides of the electrode foil, respectively. In one embodiment, the battery cell production apparatus may include a fold line re-pressing member that is spaced apart from the winding unit and re