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KR-102964815-B1 - Electrode plate, electrode assembly, battery cell, battery, electric device and manufacturing method

KR102964815B1KR 102964815 B1KR102964815 B1KR 102964815B1KR-102964815-B1

Abstract

The present application relates to the field of battery technology, and in particular to electrode plates, electrode assemblies, battery cells, batteries, electric devices, and manufacturing methods. Herein, a folding guide portion is installed on the electrode plate, and the folding guide portion guides the folding of the electrode plate. Based on this, the electrode plates can be folded and then stacked, eliminating the need to stack them one by one. Furthermore, since the plates can be folded quickly according to the guidance of the folding guide portion during the folding process, the production efficiency of the stacked battery can be effectively improved.

Inventors

  • 샤오, 하이허
  • 장, 샤오원
  • 펑, 솽쥐안
  • 황, 야핑
  • 류, 챵
  • 리, 바이칭
  • 진 하이쭈

Assignees

  • 컨템포러리 엠퍼렉스 테크놀로지 (홍콩) 리미티드

Dates

Publication Date
20260513
Application Date
20211123

Claims (20)

  1. As an electrode assembly (201), One first electrode plate (1); and It includes a plurality of second plates (2) that are stacked together with the first plate (1) and have polarity opposite to that of the first plate (1); The first electrode plate (1) is reciprocally folded along a first direction (X) to include a plurality of first laminated pieces (11) in which the first electrode plate (1) is sequentially connected and stacked, and the second electrode plate (2) is folded once along a second direction (Y) to include two second laminated pieces (21) in which the second electrode plate (2) is connected to each other, the second direction (Y) is perpendicular to the first direction (X), and the second laminated pieces (21) and the first laminated pieces (11) are sequentially and alternately stacked; The electrode assembly (201) is characterized in that the first electrode plate (1) is a negative electrode plate (14) and the second electrode plate (2) is a positive electrode plate (24), and the area of one first laminated piece (11) of the first electrode plate (1) is larger than the area of one second laminated piece (21) of the second electrode plate (2).
  2. delete
  3. In paragraph 1, An electrode assembly (201) characterized by having at least one of a tab (15) of the first electrode plate (1) located at an edge other than the bent portion of the first electrode plate (1) and a tab (15) of the second electrode plate (2) located at an edge other than the bent portion of the second electrode plate (2).
  4. In paragraph 3, An electrode assembly (201) characterized in that the tab (15) of the first electrode plate (1) is located at an edge adjacent to the bent portion (25) of the first electrode plate (1), and the tab (15) of the second electrode plate (2) is located at an end spaced apart from the bent portion (25) of the second electrode plate (2).
  5. In paragraph 4, An electrode assembly (201) characterized in that, among any two adjacent first laminated plates (11), only one of the first laminated plates (11) is provided with a tab (15), and the folded portion (25) of the second electrode plate (2) surrounds the first laminated plate (11) on which the tab (15) is not installed.
  6. In paragraph 1, An electrode assembly (201) characterized in that at least one of the two second laminated pieces (21) of the second electrode plate (2) has a tab (15).
  7. In paragraph 1, The electrode assembly (201) is characterized in that the second electrode plate (2) has an inert region (26), the inert region (26) includes a folded portion (25) of the second electrode plate (2), and the active material (29) is not applied to the inert region (26).
  8. In Paragraph 7, An electrode assembly (201) characterized by having an insulating material (27) provided on the surface of an inert region (26) of the second electrode plate (2) facing the first electrode plate (1).
  9. In paragraph 1, An electrode assembly (201) characterized in that the tab (15) of the first electrode plate (1) and the tab (15) of the second electrode plate (2) are located on the same side or on opposite sides.
  10. In Paragraph 9, An electrode assembly (201) characterized in that the tab (15) of the first electrode plate (1) and the tab (15) of the second electrode plate (2) are located on the same side, and the tab (15) of the first electrode plate (1) and the tab (15) of the second electrode plate (2) are arranged so as to be offset from the folding direction of the first electrode plate (1).
  11. In paragraph 1, The electrode assembly (201) comprises a separator (3), and the separator (3) is characterized by separating the first electrode plate (1) and the second electrode plate (2).
  12. delete
  13. In paragraph 1, An electrode assembly (201) characterized in that a folding guide portion (28) is installed on at least one of the first electrode plate (1) and the second electrode plate (2), and the folding guide portion (28) guides at least one of the first electrode plate (1) and the second electrode plate (2) to be folded.
  14. In Paragraph 13, The above-mentioned folding guide portion (28) is characterized by including a folding mark (282) or an indentation (281) in an electrode assembly (201).
  15. In Paragraph 14, The above-mentioned folding guide portion (28) is characterized as being continuous linear or broken linear, and the electrode assembly (201).
  16. In paragraph 15, The above-mentioned folding guide portion (28) is characterized by being dotted linear, in an electrode assembly (201).
  17. In Paragraph 16, The above-mentioned folding guide portion (28) is characterized as being dotted or short linear dotted, forming an electrode assembly (201).
  18. In Paragraph 13, The above folding guide portion (28) is characterized by being inclined with respect to the width direction of at least one of the first electrode plate (1) and the second electrode plate (2), in an electrode assembly (201).
  19. In Paragraph 13, An electrode assembly (201) characterized in that only one folding guide part (28) is installed on the second electrode plate (2), so that the second electrode plate (2) is folded once.
  20. In a battery cell (20) including a housing (202), A battery cell (20) further comprising an electrode assembly (201) according to any one of claims 1, 3 to 11, and 13 to 19, wherein the electrode assembly (201) is installed within the housing (202).

Description

Electrode plate, electrode assembly, battery cell, battery, electric device and manufacturing method The present application relates to the field of battery technology, and in particular to electrode plates, electrode assemblies, battery cells, batteries, electrical devices, and manufacturing methods. Currently, batteries are being applied more and more widely, not only in energy storage power systems such as hydroelectric, thermal, wind, and solar power plants, but also in various fields including electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, military equipment, and aerospace. Stacked batteries are an important type of battery, but their production efficiency is relatively low due to structural limitations. The drawings described herein are used to provide a further understanding of the present application and constitute part of the present application, and exemplary embodiments and descriptions of the present application are used to describe the present application and are not intended to constitute any improper limitation of the present invention. In the drawings, FIG. 1 is a simple schematic diagram of an electrical device of an embodiment of the present application. FIG. 2 is a simple schematic diagram of a battery of an embodiment of the present application. FIG. 3 is a schematic perspective view of a battery cell of the first embodiment of the present application. FIG. 4 is a front view of a battery cell of the first embodiment of the present application. Figure 5 is a cross-sectional view of AA of Figure 4. Figure 6 is an enlarged schematic diagram of part I of Figure 5. Figure 7 is an enlarged schematic diagram of part II of Figure 5. Figure 8 is a cross-sectional view of the BB section of Figure 4. Figure 9 is an enlarged schematic diagram of part III of Figure 8. FIG. 10 is a schematic diagram of the lamination process of the first electrode plate and the second electrode plate of the first embodiment. Fig. 11 is a side view of Fig. 10. Figure 12 is an enlarged schematic diagram of part IV of Figure 11. Figure 13 is an enlarged schematic diagram of section V of Figure 11. FIG. 14 is a schematic perspective view of a battery cell of the second embodiment of the present application. FIG. 15 is a schematic longitudinal cross-sectional view of a battery cell of the second embodiment of the present application. FIG. 16 is a front view of an electrode assembly of the second embodiment of the present application. FIG. 17 is a schematic diagram of the lamination process of the first electrode plate and the second electrode plate of the second embodiment of the present application. Fig. 18 is a side view of Fig. 17. FIG. 19 is a side view of an electrode assembly of the second embodiment of the present application. Figure 20 is an enlarged schematic diagram of part VI of Figure 19. Figure 21 is an enlarged schematic diagram of part VII of Figure 19. FIG. 22 is a partial enlarged schematic diagram of the contact portion between the electrode assembly and the housing body of the second embodiment of the present application. FIG. 23 is a schematic perspective view of an electrode assembly of the third embodiment of the present application. FIG. 24 is a schematic diagram of the lamination process of the first electrode plate and the second electrode plate of the third embodiment of the present application. FIG. 25 is a schematic perspective view of the second electrode plate with the folding guide installed in the embodiment of the present application when it is in an unfolded state. FIG. 26 is a modified example of the second electrode plate shown in FIG. 25. FIG. 27 is a partial enlarged schematic diagram of the indentation of the second electrode plate shown in FIG. 26. FIG. 28 is a modified example of the second electrode plate shown in FIG. 25. Figure 29 is an enlarged schematic diagram of part M of Figure 28. FIG. 30 is a modified example of the second electrode plate shown in FIG. 25. Figure 31 is an enlarged schematic diagram of part N of Figure 30. FIG. 32 is a modified example of the second electrode plate shown in FIG. 25. FIG. 33 is a schematic diagram of a separator of an embodiment of the present application covering a second electrode plate. FIG. 34 shows a method for manufacturing an electrode plate according to an embodiment of the present application. FIG. 35 shows a method for manufacturing an electrode assembly of an embodiment of the present application. Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are intended only to more clearly explain the technical solution of the present application and shall not limit the scope of protection of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by a person skilled in the art of this applicati