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KR-20260066351-A - Battery cell

KR20260066351AKR 20260066351 AKR20260066351 AKR 20260066351AKR-20260066351-A

Abstract

One embodiment of the present invention discloses a battery cell comprising: a first electrode plate; a second electrode plate facing the first electrode plate; a separator between the first electrode plate and the second electrode plate; and a case accommodating the first electrode plate, the second electrode plate and the separator and filled with an electrolyte, wherein the first electrode plate includes a first region and a second region spaced apart from each other, and a first gap through which the electrolyte penetrates is defined between the first region and the second region, and the width of the first gap is 0.1 mm to 0.5 mm.

Inventors

  • 고재욱

Assignees

  • 삼성에스디아이 주식회사

Dates

Publication Date
20260512
Application Date
20241104

Claims (20)

  1. First plate; A second plate facing the first plate above; A separator between the first electrode plate and the second electrode plate; and A case comprising the first electrode plate, the second electrode plate, and the separator, and filled with an electrolyte; The above-mentioned first electrode plate includes a first region and a second region spaced apart from each other, and A battery cell in which a first gap through which the electrolyte penetrates is defined between the first region and the second region, and the width of the first gap is 0.1 mm to 0.5 mm.
  2. In paragraph 1, A battery cell in which the shape of the second electrode plate is the shape obtained by rotating the first electrode plate by 180°.
  3. In paragraph 1, The first region and the second region each comprise a battery cell including a first non-removable portion.
  4. In paragraph 1, The second electrode plate includes a third region and a fourth region spaced apart from each other, and A battery cell in which a second gap through which the electrolyte penetrates is defined between the third region and the fourth region.
  5. In paragraph 1, The battery cell comprising the first region and the second region, which include grooves drawn into the first region or the second region from the first gap.
  6. In paragraph 5, A battery cell in which the ratio of the width of the groove to the length of the short side of the first electrode plate is 0.125 to 0.375.
  7. In paragraph 1, The above first gap has a zigzag shape and is a battery cell extended along the first direction.
  8. In Paragraph 7, A battery cell in which the ratio of the shortest width of the first region along the second direction to the length of the short side of the first electrode plate along the second direction perpendicular to the first direction is 0.125 to 0.375.
  9. In Paragraph 7, A battery cell in which the ratio of the total length of the first gap to the length of the long side of the first electrode plate along the first direction is 1.1 to 1.5.
  10. In Paragraph 7, A battery cell in which the first gap and the second gap are symmetrical with respect to an imaginary line passing through the center of the first electrode plate along the first direction.
  11. A first electrode plate including a first region and a second region spaced apart from each other; A second electrode plate facing the first electrode plate and including a third region and a fourth region spaced apart from each other; and A separator between the first electrode plate and the second electrode plate; and A case comprising the first electrode plate, the second electrode plate, and the separator, and filled with an electrolyte; A battery cell in which the shape of the second electrode plate is the shape obtained by rotating the first electrode plate by 180°.
  12. In Paragraph 11, A battery cell in which the electrolyte penetrates into the first gap between the first region and the second region and the second gap between the third region and the fourth region.
  13. In Paragraph 12, The above first gap is a battery cell extended along the first direction.
  14. In Paragraph 13, The above first gap is a battery cell with a zigzag shape.
  15. In Paragraph 14, The battery cell comprising the first region and the second region, which include grooves drawn into the first region or the second region from the first gap.
  16. In Paragraph 14, A battery cell in which the ratio of the total length of the first gap to the length of the long side of the first electrode plate along the first direction is 1.1 to 1.5.
  17. In Paragraph 14, A battery cell in which the ratio of the shortest width of the first region along the second direction to the length of the short side of the first electrode plate along the second direction perpendicular to the first direction is 0.125 to 0.375.
  18. In Paragraph 11, The first region and the second region include grooves drawn into the first region or the second region from the first gap, and A battery cell in which the ratio of the width of the groove to the length of the short side of the first electrode plate is 0.125 to 0.375.
  19. In Paragraph 11, The first region and the second region each comprise a battery cell including a first non-removable portion.
  20. In Paragraph 11, A battery cell in which the width of the first Euro is 0.1 mm to 0.5 mm.

Description

Battery cell The present invention relates to a battery cell. Unlike primary batteries, which cannot be recharged, secondary batteries are batteries capable of both charging and discharging. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptop computers, digital cameras, and camcorders, while high-capacity secondary batteries are widely used as power sources for motor drive and power storage in hybrid and electric vehicles. Such secondary batteries include an electrode assembly composed of a first electrode plate and a second electrode plate, a case housing the same, and electrode terminals connected to the electrode assembly. The information described above disclosed in the background technology of this invention is intended only to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art. The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a perspective view schematically illustrating an example of a battery cell according to one embodiment of the present invention. FIG. 2 is a schematic cross-sectional view illustrating an example of the A-A' section of FIG. 1. FIG. 3 is a schematic cross-sectional view illustrating an example of a cross-section of the first electrode plate of FIG. 1. FIG. 4 is a cross-sectional view schematically illustrating an example of a cross-section of the second electrode plate of FIG. 1. FIG. 5 is a schematic cross-sectional view illustrating another example of the cross-section of the first electrode plate of FIG. 1. FIG. 6 is a schematic cross-sectional view illustrating another example of the cross-section of the first electrode plate of FIG. 1. FIG. 7 is a schematic cross-sectional view illustrating another example of the cross-section of the second electrode plate of FIG. 1. FIG. 8 is a schematic cross-sectional view illustrating another example of the cross-section of the first electrode plate of FIG. 1. FIG. 9 is a schematic perspective view illustrating an example of a battery module including a battery cell according to embodiments of the present invention. FIG. 10 is a cross-sectional view schematically illustrating an example of a moving means including a battery cell according to embodiments of the present invention. Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe their invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely some of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention. It should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application. Additionally, as used herein, “comprise, include” and/or “comprising, including” specify the presence of the mentioned features, numbers, steps, actions, parts, elements, and/or groups thereof, and do not exclude the presence or addition of one or more other features, numbers, actions, parts, elements, and/or groups. Additionally, to aid in understanding the invention, the attached drawings are not drawn to actual scale, and the dimensions of some components may be exaggerated. Furthermore, the same reference numerals may be assigned to identical components in different embodiments. Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless specifically stated otherwise, the first component may also be the second component. Throughout the specification, unless specifically stated otherwise, each component may be singular or plural. The fact that any configuration is placed on the "upper (or lower)" of a component or on the "upper (or lower)" of a component may mean not only that any configuration is placed in contact with the upper (or lower) surface of said component, but also that another configuration may be interposed between said component and any configura