Search

CN-122025726-A - Secondary battery and method for manufacturing same

CN122025726ACN 122025726 ACN122025726 ACN 122025726ACN-122025726-A

Abstract

The present disclosure relates to a secondary battery and a method of manufacturing the same. The secondary battery includes an electrode assembly, an outer part having a receiving part and a wing part extending along a circumference of the receiving part, the electrode assembly being received in the receiving part, the wing part including a folding part having a plurality of folding bodies folded inward or outward, and a penetration hole part, and a molding part covering and coupled to the outer part along a circumference of the outer part and extending through the penetration hole part.

Inventors

  • JIANG MINZHI
  • CUI ZAIHE

Assignees

  • 三星SDI株式会社

Dates

Publication Date
20260512
Application Date
20251027
Priority Date
20241111

Claims (20)

  1. 1. A secondary battery, comprising: An electrode assembly; An outer part having a receiving part in which the electrode assembly is received and a wing part extending along a circumference of the receiving part, the wing part including a folded part having: a plurality of folding bodies folded inwards or outwards, and Through hole portion, and A molding portion covering and bonded to the outer portion along a periphery of the outer portion and extending through the penetrating hole portion.
  2. 2. The secondary battery according to claim 1, wherein the penetrating hole portions are provided in plurality, and Wherein the penetrating hole portions of the plurality of penetrating hole portions are spaced apart from each other in the longitudinal direction of the folded body.
  3. 3. The secondary battery according to claim 1, wherein the external portion includes: a first outer body having the receiving portion and a first wing portion extending along the periphery of the receiving portion, and And a second outer body having a second wing portion contacting the first wing portion and covering the receiving portion.
  4. 4. The secondary battery according to claim 3, wherein the folded portion is formed by folding the first and second wing portions inwardly or outwardly, the first and second wing portions being located at opposite sides with respect to a central axis in a longitudinal direction of the electrode assembly and being coupled to each other.
  5. 5. The secondary battery according to claim 1, wherein the folded body comprises: An inner folded body folded toward one side of the receiving portion, and An outer folder folded at an end of the inner folder to overlap the inner folder.
  6. 6. The secondary battery according to claim 5, wherein the inner folded body is provided in plurality, and Wherein the outer fold is disposed between inner folds of the plurality of inner folds.
  7. 7. The secondary battery according to claim 1, wherein the molded portion is formed of an insulating material.
  8. 8. The secondary battery according to claim 1, wherein a thickness of the molded portion is less than or equal to a thickness of the outer portion.
  9. 9. The secondary battery according to claim 1, wherein the electrode assembly includes a first electrode tab and a second electrode tab extending outwardly from the outer portion.
  10. 10. The secondary battery according to claim 9, wherein the electrode assembly comprises a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate, and Wherein the first electrode plate is connected to the first electrode tab, and the second electrode plate is connected to the second electrode tab.
  11. 11. A method of manufacturing a secondary battery, the method comprising: Accommodating an electrode assembly in the outer part; Forming a folded portion by folding a wing portion extending along a periphery of the outer portion, the folded portion including a plurality of folded bodies folded inward or outward and having a penetrating hole portion, and A molded portion is bonded to the outer portion along the periphery of the outer portion and through the through hole portion.
  12. 12. The method of claim 11, further comprising connecting a protective circuit board to the first and second electrode tabs of the electrode assembly, Wherein the first electrode tab and the second electrode tab extend outwardly from the outer portion.
  13. 13. The method of claim 12, further comprising connecting an insulating member to the protective circuit board.
  14. 14. The method of claim 12, wherein the electrode assembly comprises a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate, and Wherein the first electrode plate is connected to the first electrode tab, and the second electrode plate is connected to the second electrode tab.
  15. 15. The method of claim 11, wherein the bonding of the molded portions comprises: disposing the outer portion in which the electrode assembly is received on a mold portion; Forming the molded portion by adding an insulating material to the mold portion, and Extracting the outer portion bonded to the molded portion from the mold portion.
  16. 16. The method of claim 11, wherein the penetrating hole portion comprises a plurality of penetrating hole portions, and Wherein the penetrating hole portions of the plurality of penetrating hole portions are spaced apart from each other in the longitudinal direction of the folded body.
  17. 17. The method of claim 11, wherein the outer portion comprises: a first external body having a receiving portion in which the electrode assembly is received and a first wing portion extending along a circumference of the receiving portion, and And a second outer body having a second wing portion contacting the first wing portion and covering the receiving portion.
  18. 18. The method of claim 17, wherein the folded portion is formed by folding the first wing portion and the second wing portion inwardly or outwardly, the first wing portion and the second wing portion being located at opposite sides with respect to a central axis in a longitudinal direction of the electrode assembly and being coupled to each other.
  19. 19. The method of claim 17, wherein the folded body comprises: an inner folder folded toward a side of the receiving part where the electrode assembly is received, and An outer folder folded at an end of the inner folder to overlap the inner folder.
  20. 20. The method of claim 11, wherein the thickness of the molded portion is less than or equal to the thickness of the outer portion.

Description

Secondary battery and method for manufacturing same Technical Field Aspects of embodiments of the present disclosure relate to a secondary battery and a method of manufacturing the same. Background In general, secondary batteries are rechargeable batteries, and are being applied to various technical fields across various industries, such as electric, electronic, and telecommunication fields, and computers. Secondary batteries are widely used not only as energy sources for mobile electronic devices such as digital cameras, mobile phones, and laptop computers, but also as energy sources for hybrid vehicles and electric vehicles, which solve air pollution caused by existing gasoline and diesel internal combustion engines using fossil fuels, and the like. Secondary batteries are being studied in various ways to improve performance and stability according to the type and amount of use thereof. The above information in this background section is provided to enhance understanding of the background of the disclosure and, therefore, may also comprise information that does not form a related (or prior) art. Disclosure of Invention Embodiments of the present disclosure include a secondary battery and a method of manufacturing the same, in which a molding portion passes through a penetration hole portion (e.g., an opening) formed in a wing portion and is covered and coupled to an external portion, so that the bonding strength between the external portion, in which an electrode assembly is received, and the molding portion can be improved. Aspects and features of the present disclosure, as well as other non-mentioned aspects and features of the present disclosure, may be understood by the following description, and will be more clearly understood by describing embodiments of the present disclosure. Furthermore, it should be understood that aspects and features of the present disclosure may be realized by means of the instrumentalities and combinations particularly pointed out in the appended claims. According to an embodiment of the present disclosure, a secondary battery includes an electrode assembly, an outer part having a receiving part in which the electrode assembly is received and a wing part extending along a circumference of the receiving part, and a molding part covering and coupled to the outer part along the circumference of the outer part. The wing portion includes a folded portion having a plurality of folded bodies folded inwardly or outwardly, and a penetration hole portion through which the molded portion passes. In an embodiment, the penetrating hole portions may be provided in plurality, and the penetrating hole portions of the plurality of penetrating hole portions may be spaced apart from each other in the longitudinal direction of the folded body. In an embodiment, the outer portion may include a first outer body having a receiving portion and a first wing portion extending along a periphery of the receiving portion, and a second outer body having a second wing portion contacting the first wing portion and covering the receiving portion. In an embodiment, the folded portion may be formed by folding the first wing portion and the second wing portion inwardly or outwardly, the first wing portion and the second wing portion being located at opposite sides with respect to a central axis in a longitudinal direction of the electrode assembly and being coupled to each other. In an embodiment, the folder may include an inner folder folded toward one side of the receiving portion and an outer folder folded at an end of the inner folder to overlap the inner folder. In an embodiment, the inner folder may be provided in plurality, and the outer folder may be disposed between the plurality of inner folds. In an embodiment, the molding portion may be formed of an insulating material. In an embodiment, the thickness of the molded portion may be less than or equal to the thickness of the outer portion. In an embodiment, the electrode assembly may include a first electrode tab and a second electrode tab extending outwardly from the outer portion. In an embodiment, an electrode assembly may include a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate. The first electrode plate may be connected to the first electrode tab, and the second electrode plate may be connected to the second electrode tab. According to another embodiment of the present disclosure, a method of manufacturing a secondary battery includes accommodating an electrode assembly in an outer part, forming a folded part by folding a wing part, the wing part extending along a periphery of the outer part, and bonding a molded part to the outer part along the periphery of the outer part. The folded portion may have a plurality of folded bodies folded inward or outward, and a penetration hole portion through which the molded portion penetrates. In an embodiment, the method may fu