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US-20260128277-A1 - BATTERY CELL

US20260128277A1US 20260128277 A1US20260128277 A1US 20260128277A1US-20260128277-A1

Abstract

Provided is a battery cell including a first electrode plate, a second electrode plate facing the first electrode plate, a separator positioned between the first electrode plate and the second electrode plate, a case accommodating the first electrode plate, the second electrode plate, and the separator, and an electrolyte provided in the case. The first electrode plate includes a first region and a second region that are spaced apart from each other. A gap into which the electrolyte permeates is formed between the first region and the second region, and a width of the gap is 0.1 mm to 0.5 mm.

Inventors

  • JAEWOOK KO

Assignees

  • SAMSUNG SDI CO., LTD.

Dates

Publication Date
20260507
Application Date
20250429
Priority Date
20241104

Claims (20)

  1. 1 . A battery cell comprising: a first electrode plate; a second electrode plate facing the first electrode plate; a separator positioned between the first electrode plate and the second electrode plate; a case accommodating the first electrode plate, the second electrode plate and the separator; and an electrolyte provided in the case, wherein the first electrode plate includes a first region and a second region that are spaced apart from each other, and wherein a gap into which the electrolyte permeates is formed between the first region and the second region, with a width of the gap being 0.1 mm to 0.5 mm.
  2. 2 . The battery cell of claim 1 , wherein a shape of the second electrode plate is the same as a shape of the first electrode plate rotated by 180°.
  3. 3 . The battery cell of claim 1 , wherein the first region and the second region each include a non-coated portion.
  4. 4 . The battery cell of claim 1 , wherein the second electrode plate includes a third region and a fourth region that are spaced apart from each other, and a gap into which the electrolyte permeates is formed between the third region and the fourth region.
  5. 5 . The battery cell of claim 1 , wherein the first region includes a groove extending from the gap into the first region and the second region includes a groove extending from the gap into the second region.
  6. 6 . The battery cell of claim 5 , wherein a ratio of a width of each of the grooves to a length of a shorter side of the first electrode plate is 0.125 to 0.375.
  7. 7 . The battery cell of claim 1 , wherein the gap has a zigzag shape and extends.
  8. 8 . The battery cell of claim 7 , wherein the gap extends along a first direction, and wherein a ratio of the shortest width of the first region along a second direction perpendicular to the first direction to a length of a shorter side of the first electrode plate along the second direction is 0.125 to 0.375.
  9. 9 . The battery cell of claim 7 , wherein the gap extends along a first direction, and wherein a ratio of a total length of the gap to a length of a longer side of the first electrode plate along the first direction is 1.1 to 1.5.
  10. 10 . The battery cell of claim 4 , wherein the gap in the first electrode plate and the gap in the second electrode plate are symmetric to each other with respect to an imaginary line passing through a center of the first electrode plate along a direction that the gaps extend.
  11. 11 . A battery cell comprising: a first electrode plate including a first region and a second region that are spaced apart from each other, a second electrode plate facing the first electrode plate and including a third region and a fourth region that are spaced apart from each other, a separator positioned 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 an electrolyte, wherein a shape of the second electrode plate is the same as the first electrode plate rotated by 180°.
  12. 12 . The battery cell of claim 11 , wherein the electrolyte permeates a first gap between the first region and the second region and a second gap between the third region and the fourth region.
  13. 13 . The battery cell of claim 12 , wherein the first gap extends along a first direction and the second gap extends along the first direction.
  14. 14 . The battery cell of claim 13 , wherein the first gap has a zigzag shape.
  15. 15 . The battery cell of claim 14 , wherein the first region includes a groove extending from the first gap into the first region and the second region includes a groove extending from first gap into the second region.
  16. 16 . The battery cell of claim 14 , wherein a ratio of a total length of the first gap to a length of a longer side of the first electrode plate along the first direction is 1.1 to 1.5.
  17. 17 . The battery cell of claim 14 , wherein a ratio of a shortest width of the first region along a second direction perpendicular to the first direction to a length of a shorter side of the first electrode plate along the second direction is 0.125 to 0.375.
  18. 18 . The battery cell of claim 11 , wherein the first region and the second region each include a groove extending from the first gap into the regions, and a ratio of a width of the groove to a length of a shorter side of the first electrode plate is 0.125 to 0.375.
  19. 19 . The battery cell of claim 11 , wherein the first region and the second region each include a non-coated portion.
  20. 20 . The battery cell of claim 11 , wherein a width of the first gap is 0.1 mm to 0.5 mm.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is based on and claims priority under 35 USC § 119 to Korean Patent Application No. 10-2024-0154261, filed on Nov. 4, 2024, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. BACKGROUND 1. Field The present disclosure relates to a battery cell. 2. Description of the Related Art Secondary batteries are batteries that can be charged and discharged, unlike primary batteries that cannot be recharged. Low-capacity secondary batteries are used in small, portable electronic devices such as smartphones, feature phones, laptops, digital cameras, and camcorders, while large-capacity secondary batteries are widely used as power sources for driving motors in hybrid cars, electric cars, and as power storage batteries. These secondary batteries include an electrode assembly including a first electrode plate and a second electrode plate, a case for accommodating the electrode assembly, and electrode terminals connected to the electrode assembly. The above-described information disclosed in the background art of this disclosure is only intended to improve understanding of the background of the present disclosure and therefore may include information that does not constitute prior art. SUMMARY The present disclosure provides a battery cell made in a reduced amount of time and having improved performance. However, the technical problems to be solved by the present disclosure are not limited to the problems described above, and other problems not mentioned may be clearly understood by those skilled in the art from the disclosure. An embodiment of the present disclosure provides a battery cell including a first electrode plate, a second electrode plate facing the first electrode plate, a separator positioned between the first electrode plate and the second electrode plate, a case accommodating the first electrode plate, the second electrode plate, and the separator, and an electrolyte provided in the case, wherein the first electrode plate includes a first region and a second region spaced apart from each other and a gap into which the electrolyte permeates is formed between the first region and the second region, wherein the width of the first gap is 0.1 mm to 0.5 mm. In an embodiment, the shape of the second electrode plate is the same as a shape of the first electrode plate rotated by 180°. In an embodiment, the first region and the second region may each include a non-coated portion. In an embodiment, the second electrode plate may include a third region and a fourth region spaced apart from each other, and a gap into which the electrolyte permeates may be formed between the third region and the fourth region. In an embodiment, the first region may include a groove extending from the gap into the first region and the second region may include a groove extending from the gap into the second region. In an embodiment, the ratio of the width of each of the grooves to the length of a shorter side of the first electrode plate may be 0.125 to 0.375. In an embodiment, the first gap has a zigzag shape and may extend along a first direction. In an embodiment, the ratio of the shortest width of the first region along a second direction to the length of the shorter side of the first electrode plate along the second direction perpendicular to the first direction may be 0.125 to 0.375. In an embodiment, the ratio of a total length of the gap to the length of a longer side of the first electrode plate along the first direction may be 1.1 to 1.5. In an embodiment, the gap in the first electrode plate and the gap in the second electrode plate may be symmetric to each other with respect to an imaginary line passing through a center of the first electrode plate along the first direction. Another embodiment of the present disclosure provides a battery cell that includes a first plate including a first region and a second region spaced apart from each other, a second plate facing the first plate and including a third region and a fourth region spaced apart from each other, and a separator positioned 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 an electrolyte, wherein the shape of the second plate may be the same as a shape of the first plate rotated by 180°. In an embodiment, the electrolyte may permeate through a first gap between the first region and the second region and a second gap between the third region and the fourth region. In an embodiment, the first gap may extend along a first direction and the second gap may extend along the first direction. In an embodiment, the first gap may have a zigzag shape. In an embodiment, the first region and the second region may each include a groove extend from the first gap into the regions. In an embodiment, the ratio of a total length of the first gap t