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EP-4741122-A1 - ELECTRODE PLATE SLITTING APPARATUS AND ELECTRODE PLATE SLITTING METHOD USING THE SAME

EP4741122A1EP 4741122 A1EP4741122 A1EP 4741122A1EP-4741122-A1

Abstract

An electrode plate slitting apparatus includes a first cutting unit configured to cut a supplied electrode plate raw material into a plurality of split electrode plates, a second cutting unit configured to cut the plurality of split electrode plates, a sensor unit configured to detect the plurality of split electrode plates supplied to the second cutting unit, resulting in detected split electrode plates, and a control unit configured to receive information about the detected split electrode plates, and control driving of the second cutting unit.

Inventors

  • LEE, JUNSUB
  • JUN, PILGOO

Assignees

  • SAMSUNG SDI CO., LTD.

Dates

Publication Date
20260513
Application Date
20250910

Claims (15)

  1. An electrode plate slitting apparatus (1), comprising: a first cutting unit (300) configured to cut a supplied electrode plate raw material (20) into a plurality of split electrode plates (21); a second cutting unit (500) configured to cut the plurality of split electrode plates (21); a sensor unit (600) configured to detect the plurality of split electrode plates (21) supplied to the second cutting unit (500), resulting in detected split electrode plates (21); and a control unit (800) configured to: receive information about the detected split electrode plates (21), and control driving of the second cutting unit (500).
  2. The electrode plate slitting apparatus (1) as claimed in claim 1, wherein: the electrode plate raw material (20) has coated portions (20a) and uncoated portions (20b), the sensor unit (600) is further configured to detect a boundary line between a coated portion (20a-1) and an uncoated portion (20b-1) of the plurality of split electrode plates (21), and the control unit (800) is further configured to compensate and drive and control the second cutting unit (500) according to an error in the boundary line detected by the sensor unit (600).
  3. The electrode plate slitting apparatus (1) according to any of the preceding claims, wherein: the plurality of split electrode plates (21) are alternately separated in different directions prior to cutting by the second cutting unit (500), resulting in separated split electrode plates (21a, 21b), and the second cutting unit (500) comprises a plurality of slitting lines (510, 520) arranged on paths along which the plurality of separated split electrode plates (21a, 21b) are separated, respectively.
  4. The electrode plate slitting apparatus (1) as claimed in claim 3, wherein each of the plurality of slitting lines (510, 520) comprises: a coated-side knife (511a, 513a, 521a, 523a) configured to slit one side of a coated portion (20a-1) of each of the plurality of split electrode plates (21); and an uncoated-side knife (511b, 513b, 521b, 523b) configured to slit one side of an uncoated portion (20b-1) of each of the plurality of split electrode plates (21).
  5. The electrode plate slitting apparatus as claimed in claim 4, wherein the coated-side knife (511a, 513a, 521a, 523a) and the uncoated-side knife (511b, 513b, 521b, 523b) are independently driven and controlled.
  6. The electrode plate slitting apparatus (a) according to any of claims 3 to 5, wherein the sensor unit (600) comprises a plurality of sensor units (610, 620) configured to respectively detect the plurality of split electrode plates (21) supplied to the plurality of slitting lines (510, 520).
  7. The electrode plate slitting apparatus (1) according to any of the preceding claims, further comprising an alignment unit (200) configured to adjust alignment of the supplied electrode plate raw material (20).
  8. The electrode plate slitting apparatus (1) as claimed in claim 7, wherein the alignment unit (200) is further configured to adjust the alignment of the supplied electrode plate raw material (20) based on the information about the plurality of split electrode plates (21) detected by the sensor unit (600).
  9. An electrode plate slitting method, preferably performed by an electrode plate slitting apparatus (1) configured according to any of the previous claims, the method comprising: supplying an electrode plate raw material (20) to a first cutting unit (300); cutting, by the first cutting unit (300), the electrode plate raw material (20) into a plurality of split electrode plates (21); supplying the plurality of split electrode plates (21) to a second cutting unit (500); cutting, by the second cutting unit (500), the plurality of split electrode plates (21); detecting, by a sensor unit (600), the plurality of split electrode plates (21) supplied to the second cutting unit (500); and controlling, by a control unit (800), driving of the second cutting unit (500) based on information about the plurality of split electrode plates (21) detected by the sensor unit (600).
  10. The electrode plate slitting method as claimed in claim 9, further comprising: detecting, by the sensor unit (600), a boundary line between a coated portion (20a-1) and an uncoated portion (20b-1) of each of the plurality of split electrode plates (21), and compensating, driving and controlling the second cutting unit (500) according to an error in the boundary line detected by the sensor unit (600).
  11. The electrode plate slitting method as claimed in any of claims 9 or 10, further comprising alternately separating the plurality of split electrode plates (21), resulting in separated split electrode plates (21a, 21b), in different directions and supplying the separated split electrode plates (21a, 21b) to the second cutting unit (500), wherein the second cutting unit (500) comprises a plurality of slitting lines (510, 520) arranged on paths along which the plurality of separated split electrode plates (21a, 21b) are separated, respectively.
  12. The electrode plate slitting method as claimed in claim 11, further comprising: slitting, by a coated-side knife (511a, 513a, 521a, 523a), one side of a coated portion (20a-1) of each of the plurality of split electrode plates (21); and slitting, by an uncoated-side knife (511b, 513b, 521b, 523b), one side of an uncoated portion (20b-1) of each of the plurality of split electrode plates (21).
  13. The electrode plate slitting method as claimed in any of claims 11 or 12, wherein the detecting comprises detecting, by a plurality of sensor units (610, 620), the plurality of split electrode plates (21) supplied to the plurality of slitting lines (510, 520).
  14. The electrode plate slitting method as claimed in any of claims 9 to 13, further comprising adjusting, by an alignment unit (200), alignment of the electrode plate raw material (20) supplied to the first cutting unit (300).
  15. The electrode plate slitting method as claimed in claim 14, wherein the adjusting performed by the alignment unit (200) is based on the information about the plurality of split electrode plates (21) detected by the sensor unit (600).

Description

This application is based on and claims priority to Korean Patent Application No. 10-2024-0159933, filed on November 12, 2024, in the Korean Intellectual Property Office. BACKGROUND 1. Field Embodiments relate to an electrode plate slitting apparatus and an electrode plate slitting method using the electrode plate slitting apparatus. 2. Description of the Related Art A secondary battery is formed by inserting an electrode assembly, in which a positive electrode plate, a negative electrode plate, and a separator are wound, into a case and sealing the case with a cap assembly. A positive electrode plate or a negative electrode plate (hereinafter, referred to as an 'electrode plate') is formed to have a coated portion where an active material slurry is coated on an aluminum or copper thin film and an uncoated portion where no coating is applied. The above information disclosed in this Background section is for enhancement of understanding of the background of the present disclosure, and therefore, it may contain information that does not constitute related (or prior) art. SUMMARY Embodiments include an electrode plate slitting apparatus, including a first cutting unit configured to cut a supplied electrode plate raw material into a plurality of split electrode plates, a second cutting unit configured to cut the plurality of split electrode plates, a sensor unit configured to detect the plurality of split electrode plates supplied to the second cutting unit, resulting in detected split electrode plates, and a control unit configured to receive information about the detected split electrode plates, and control driving of the second cutting unit. The electrode plate raw material may have coated portions and uncoated portions that are alternated and repeated in a width direction of the electrode plate raw material, and each of the plurality of split electrode plates may include a coated portion of the coated portions and an uncoated portion of the uncoated portions. The first cutting unit may include a plurality of splitting knives having a slitting width corresponding to a width of the plurality of split electrode plates, and the plurality of splitting knives may be spaced apart from each other with spacers therebetween. The electrode plate raw material may have coated portions and uncoated portions, the sensor unit may be further configured to detect a boundary line between a coated portion of the coated portions and an uncoated portion of the uncoated portions of each of the plurality of split electrode plates, and the control unit may be further configured to compensate and drive and control the second cutting unit according to an error in the boundary line detected by the sensor unit. The plurality of split electrode plates may be alternately separated in different directions prior to cutting by the second cutting unit, and the second cutting unit may include a plurality of slitting lines arranged on paths along which the plurality of split electrode plates are separated, respectively. Each of the plurality of slitting lines may include a coated-side knife configured to slit one side of the coated portion of each of the plurality of split electrode plates, and an uncoated-side knife configured to slit one side of the uncoated portion of each of the plurality of split electrode plates. The coated-side knife and the uncoated-side knife may be independently driven and controlled. The sensor unit may include a plurality of sensor units configured to respectively detect the plurality of split electrode plates supplied to the plurality of slitting lines. The electrode plate slitting apparatus may further include an alignment unit configured to adjust alignment of the supplied electrode plate raw material. The alignment unit may be further configured to adjust the alignment of the supplied electrode plate raw material based on the information about the plurality of split electrode plates detected by the sensor unit. Embodiments include an electrode plate slitting method, including supplying an electrode plate raw material to a first cutting unit, cutting, by the first cutting unit, the electrode plate raw material into a plurality of split electrode plates, supplying the plurality of split electrode plates to a second cutting unit, cutting, by the second cutting unit, the plurality of split electrode plates, detecting, by a sensor unit, the plurality of split electrode plates supplied to the second cutting unit, and controlling, by a control unit, driving of the second cutting unit based on information about the plurality of split electrode plates detected by the sensor unit. The electrode plate raw material may have coated portions and uncoated portions that are alternately and repeatedly arranged in a width direction, and each of the plurality of split electrode plates comprises a coated portion of the coated portions and an uncoated portion of the uncoated portions. The first cutting unit may include a plurality