A rolling device for a secondary battery includes a mandrel to roll a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate, the mandrel having a pair of clamps at a center of the mandrel, a blade surrounding the
A rolling device for a secondary battery includes a mandrel to roll a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate, the mandrel having a pair of clamps at a center of the mandrel, a blade surrounding the clamps while being spaced apart from the clamps, the blade having an elliptical cross-section and being divided into four sections, the first electrode plate, second electrode plate, and separator being rolled on the blade, and a rotating body coupled to an interior side of the blade, the rotating body being between the clamps and the blade.
대표청구항▼
1. A rolling device for a secondary battery, the rolling device comprising: a mandrel to roll a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate,wherein the mandrel includes: a pair of clamps at a center of t
1. A rolling device for a secondary battery, the rolling device comprising: a mandrel to roll a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate,wherein the mandrel includes: a pair of clamps at a center of the mandrel,a blade surrounding the clamps while being spaced apart from the clamps, the blade having an elliptical cross-section and being divided into four sections, the first electrode plate, second electrode plate, and separator being rolled on the blade, anda rotating body coupled to an interior side of the blade, the rotating body being between the clamps and the blade. 2. The rolling device as claimed in claim 1, wherein the blade is divided into the four sections along a first imaginary line and a second imaginary line passing its center. 3. The rolling device as claimed in claim 2, wherein the blade includes: acute first and second points at a first side and a second side of the elliptical cross-section, respectively, anda long axis connecting the first point and the second point while passing the center of the blade, and a short axis perpendicular to the long axis while passing the center of the blade. 4. The rolling device as claimed in claim 2, wherein the first and second imaginary lines are tilted at an acute angle with respect to respective long and short axes of the elliptical cross-section. 5. The rolling device as claimed in claim 3, wherein the first imaginary line is tilted from the long axis by a preset angle. 6. The rolling device as claimed in claim 3, wherein the second imaginary line is tilted from the short axis by a preset angle. 7. The rolling device as claimed in claim 3, wherein the first imaginary line and the second imaginary line are spaced apart from the first point and the second point, respectively. 8. The rolling device as claimed in claim 1, wherein the rotating body includes four rotating body sections coupled to respective ones of the divided blade sections. 9. The rolling device as claimed in claim 8, wherein the four rotating body sections with the respective blade sections are moveable radially with respect to a center of the blade. 10. The rolling device as claimed in claim 1, wherein the rotating body is moveable toward and away from a center of the mandrel. 11. The rolling device as claimed in claim 10, wherein the blade is moveable toward and away from the center of the mandrel in accordance with the rotating body. 12. The rolling device as claimed in claim 1, wherein the pair of clamps are spaced apart from each other, an end of the separator being inserted into a region between the pair of clamps. 13. A mandrel to roll an electrode assembly, the mandrel comprising: a pair of clamps at a center of the mandrel;a blade surrounding the clamps while being spaced apart from the clamps, the blade having an elliptical cross-section and being divided into four sections, the electrode assembly to be rolled on the blade; anda rotating body coupled to an interior side of the blade, the rotating body being between the clamps and the blade.
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이 특허에 인용된 특허 (2)
Juergens Tristan (Loveland CO), Method for manufacture of electrochemical cell.
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