IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0410307
(2006-04-25)
|
등록번호 |
US-7542266
(2009-07-01)
|
우선권정보 |
KR-10-2005-0034226(2005-04-25) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
7 |
초록
A cylindrical battery including a wound electrode assembly and a center pin disposed in a center space of the electrode assembly, the center pin having a gap along its length, the gap defined by opposing edges of the center pin, wherein at least one of the opposing edges is sloped.
대표청구항
▼
What is claimed is: 1. A cylindrical battery, comprising: a wound electrode assembly; a center pin disposed in a center space of the wound electrode assembly, the center pin having a gap along a length of the center pin and a region adjacent to the gap, the region following a chord of the circumfer
What is claimed is: 1. A cylindrical battery, comprising: a wound electrode assembly; a center pin disposed in a center space of the wound electrode assembly, the center pin having a gap along a length of the center pin and a region adjacent to the gap, the region following a chord of the circumference of the center pin the gap defined by opposing edges of the region, wherein at least one of the opposing edges are sloped and the opposing edges face each other. 2. The cylindrical battery as claimed in claim 1, where the at least one opposing edge-is sloped towards an outer surface or an inner surface of the center pin. 3. The cylindrical battery as claimed in claim 2, wherein a surface of the at least one opposing edge and the outer surface of the region define an obtuse angle. 4. The cylindrical battery as claimed in claim 3, wherein the obtuse angle is greater than or equal to about 120°. 5. The cylindrical battery as claimed in claim 1, wherein each of the opposing edges are sloped. 6. The cylindrical battery as claimed in claim 5, wherein virtual extension lines extending from the sloped surfaces of two opposing edges cross in an inner space of the center pin, and a crossing angle between the extension lines is greater than or equal to about 60°. 7. The cylindrical battery as claimed in claim 1, wherein the region of the center pin that is adjacent to the gap is substantially flat. 8. The cylindrical battery as claimed in claim 7, wherein a first portion of the region on a first side of the gap and a second portion of the region on a second side of the gap are substantially coplanar. 9. The cylindrical battery as claimed in claim 1, wherein the gap is substantially centered on the chord. 10. The cylindrical battery as claimed in claim 1, wherein a height of the center pin is about 90 to about 110% of a height of the wound electrode assembly. 11. The cylindrical battery as claimed in claim 1, wherein ends of the center pin are tapered. 12. The cylindrical battery as claimed in claim 1, wherein the cylindrical battery is a cylindrical lithium secondary battery. 13. The cylindrical battery as claimed in claim 1, wherein the wound electrode assembly includes a first electrode plate, a second electrode plate, and a separator interposed between the first and second electrode plates, the wound electrode assembly being wound in a spiral, and the center pin is disposed against a surface of the second electrode plate. 14. A cylindrical battery, comprising: a wound electrode assembly; a tubular center pin disposed in a center space of the wound electrode assembly, the tubular center pin having a gap along a length of the tubular center pin and a region adjacent to the gap, the region following a chord of the circumference of the tubular center pin, the gap defined by opposing edges of the tubular center pin, wherein a surface of at least one of the opposing edges and an inner surface of the tubular center pin define an acute angle and the opposing edges are facing each other. 15. The cylindrical battery as claimed in claim 14, wherein the acute angle is less than or equal to about 60°. 16. The cylindrical battery as claimed in claim 14, wherein the acute angle is within a range of 45°-60°. 17. The cylindrical battery as claimed in claim 14, wherein the region is of the tubular center pin is substantially flat. 18. The cylindrical battery as claimed in claim 17, wherein a first portion of the region on a first side of the gap and a second portion of the region on a second side of the gap are substantially coplanar. 19. The cylindrical battery as claimed in claim 14, wherein the gap is substantially centered on the chord. 20. A cylindrical battery, comprising: a wound electrode; a pin penetrating through a portion of the wound electrode, the pin having a gap formed therein, the pin including an inner surface, an outer surface, a first edge and a second edge, the first edge connecting a first portion of the inner surface to a first portion of the outer surface, the second edge connecting a second portion of the inner surface to a second portion of the outer surface, wherein the gap is defined between the first and second edges and extends from the inner surface to the outer surface, and wherein: the gap has a first dimension along the inner surface, the gap has a second dimension along the outer surface, and the first dimension is different from the second dimension. 21. The cylindrical battery as claimed in claim 20, wherein each of the inner and outer surfaces of the pin includes a substantially circular portion and a substantially linear portion, the gap is defined between the substantially linear portions, and the substantially linear portions extend along a same chord of a circle that is defined by the substantially circular portions.
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