Electrode assembly including mandrel having removable portion
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-010/0587
H01M-010/04
H01M-010/38
H01M-010/28
H01M-004/04
출원번호
US-0044178
(2011-03-09)
등록번호
US-9054387
(2015-06-09)
발명자
/ 주소
Viavattine, Joseph J.
Aamodt, Paul B.
Zhao, Hailiang (Jeff)
출원인 / 주소
Medtronic, Inc.
인용정보
피인용 횟수 :
1인용 특허 :
57
초록▼
Provided is an electric storage battery including a jelly roll type electrode assembly having a mandrel. The mandrel includes a positive portion, a negative portion and a removable portion. In some embodiments, the mandrel is planar having two faces with a groove on each of the positive and negative
Provided is an electric storage battery including a jelly roll type electrode assembly having a mandrel. The mandrel includes a positive portion, a negative portion and a removable portion. In some embodiments, the mandrel is planar having two faces with a groove on each of the positive and negative portions. The grooves can be on the same or different faces of the mandrel. The grooves are dimensioned to accommodate a positive and negative feedthrough pin. The electrodes are wrapped around the mandrel using the removable portion to wind the mandrel. Once wrapped, the removable portion can be detached. The positive portion and the negative portion are left in the electrode assembly insulated from each other. The mandrel allows tighter wrapping of the jelly roll assembly, increasing battery miniaturization and also results in electrode assemblies in which after-placement of tabs does not result in burrs or shorting.
대표청구항▼
1. An electrode assembly comprising: a mandrel comprising a positive portion, a negative portion, a breakaway incision and one or more removable portions;wherein the positive portion and negative portion are adjacent to and connected to the one or more removable portions; andwherein the mandrel incl
1. An electrode assembly comprising: a mandrel comprising a positive portion, a negative portion, a breakaway incision and one or more removable portions;wherein the positive portion and negative portion are adjacent to and connected to the one or more removable portions; andwherein the mandrel includes a passage from a first face of the mandrel to a second face of the mandrel dividing the positive and negative portions;a positive electrode attached to the positive portion;a negative electrode attached to the negative portion;a positive feedthrough pin; anda negative feedthrough pin;wherein the positive portion has a groove configured to accept the positive feedthrough pin and the negative portion has a groove configured to accept the negative feedthrough pin;wherein the positive electrode and the positive feedthrough pin are conductively connected electrically to the mandrel on the positive portion;wherein the negative electrode and the negative feedthrough pin are conductively connected electrically to the mandrel on the negative portion; andwherein the one or more removable portions are detachable by the breakaway incision. 2. The electrode assembly of claim 1, wherein the one or more removable portions connect the positive portion and the negative portion. 3. The electrode assembly of claim 1, wherein the positive and negative feedthrough pins are independently selected from steel, platinum, aluminum, titanium, niobium, molybdenum, platinum-iridium, and copper and their alloys. 4. The electrode assembly of claim 1, wherein the positive and negative electrode materials are independently selected from aluminum, steel, silver, copper, nickel, titanium or alloys thereof. 5. The electrode assembly of claim 4, wherein the positive electrode is coated with a positive active material selected from lithium cobalt oxide, carbon monofluoride, silver vanadium oxide, or combinations thereof. 6. The electrode assembly of claim 4, wherein the negative electrode is coated with a negative active material selected from lithium titanate, artificial graphite powder, lithium or combinations thereof. 7. The electrode assembly of claim 1, wherein the mandrel is formed from an electrically conductive material selected from stainless steel, aluminum, titanium, nickel, copper or combinations thereof. 8. The electrode assembly of claim 1, wherein the mandrel is formed from a non-electrically conductive material selected from polypropylene, polyethylene, or poly(ethylene-co-tetrafluoroethylene). 9. The electrode assembly of claim 1, wherein the positive feedthrough pin is placed in the groove in the positive portion and negative feedthrough pin is placed in the groove in the negative portion. 10. The electrode assembly of claim 1, wherein the positive, the negative electrode, or both is/are interposed in the groove between the positive feedthrough pin or negative feedthrough pin and the mandrel. 11. The electrode assembly of claim 1, wherein the mandrel is planar. 12. A method of preparing an electrode assembly comprising: providing a mandrel comprising a positive portion, a negative portion, a breakaway incision and one or more removable portions;wherein the positive portion and negative portion are adjacent to and connected to the one or more removable portions; andwherein the mandrel includes a passage from a first face of the mandrel to a second face of the mandrel dividing the positive and negative portions;providing a positive electrode;providing a negative electrode;providing a positive feedthrough pin;providing a negative feedthrough pin;providing a groove on the positive portion configured to accept the positive feedthrough pin;providing a groove on the negative portion configured to accept the negative feedthrough pin;conductively connecting electrically the positive feedthrough pin and the positive electrode to the positive portion of the mandrel;conductively connecting electrically the negative feedthrough pin and the negative electrode to the negative portion of the mandrel; andwherein the one or more removable portions are detachable by the breakaway incision. 13. The method of preparing an electrode assembly of claim 12, wherein the one or more removable portions connect the positive portion and the negative portion. 14. The method of preparing an electrode assembly of claim 12, wherein the positive and negative feedthrough pins are independently selected from steel, platinum, aluminum, titanium, niobium, molybdenum, platinum-iridium, and copper and their alloys. 15. The method of preparing an electrode assembly of claim 12, wherein the positive and negative electrode materials are independently selected from aluminum, steel, silver, copper, nickel, titanium, or alloys thereof. 16. The method of preparing an electrode assembly of claim 15, wherein the positive electrode is coated with a positive active material selected from lithium cobalt oxide, carbon monofluoride, silver vanadium oxide, or combinations thereof. 17. The method of preparing an electrode assembly of claim 15, wherein the negative electrode is coated with a negative active material selected from lithium titanate, artificial graphite powder, lithium, or combinations thereof. 18. The method of preparing an electrode assembly of claim 12, wherein the mandrel is formed from an electrically conductive material selected from stainless steel, aluminum, titanium, nickel, copper, or combinations thereof. 19. The method of preparing an electrode assembly of claim 12, wherein the mandrel is formed from a non-electrically conductive material selected from polypropylene, polyethylene, or poly(ethylene-co-tetrafluoroethylene). 20. The method of preparing an electrode assembly of claim 12, further comprising the steps of placing the positive feedthrough pin in the positive portion groove and placing the negative feedthrough pin in the negative portion groove. 21. The method of preparing an electrode assembly of claim 12, wherein the positive electrode, the negative electrode, or both is/are interposed in the groove between the positive feedthrough pin or negative feedthrough pin and the mandrel. 22. The method of preparing an electrode assembly of claim 12, wherein the mandrel is planar.
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