A rectangular and sealed battery incorporating an outer can for accommodating a power generation element and a cover for closing an opening of the outer can such that the outer can and the cover are welded to each other. The thickness of a body portion of the outer can is smaller than the thickness
A rectangular and sealed battery incorporating an outer can for accommodating a power generation element and a cover for closing an opening of the outer can such that the outer can and the cover are welded to each other. The thickness of a body portion of the outer can is smaller than the thickness of the opening. A flange formed into a stepped portion is provided for the outer end of the cover, and the end of the opening of the outer can is made contact with the outer surface of a projection of the cover formed by the stepped portion so as to be joined to the outer surface of the projection and butt-welded to the flange. In the foregoing case, the cover and the end of the opening of the outer can are welded to each other from a side direction.
대표청구항▼
1. A battery, comprising: (a) an outer can, the can being rectangular, the outer can having a can wall having a can wall top end, the can wall having a can wall outer surface and a can wall inner surface, the can wall outer surface and can wall inner surface being parallel to each other; (b) a
1. A battery, comprising: (a) an outer can, the can being rectangular, the outer can having a can wall having a can wall top end, the can wall having a can wall outer surface and a can wall inner surface, the can wall outer surface and can wall inner surface being parallel to each other; (b) a can flange disposed at the can wall top end, the can flange having a can flange outer surface and a can flange inner surface, the can flange outer surface and inner surface being parallel to each other; the can flange further including a can flange top surface perpendicular to the can flange inner surface; (c) a cover having a cover top surface and a cover bottom surface; (d) the cover further including a cover flange, the cover flange having a cover flange outer surface, a cover flange inner surface, a cover flange bottom surface, a cover flange top surface, a cover flange intermediate surface disposed between the cover flange inner and outer surfaces; (e) wherein the cover flange top surface is parallel to the cover flange bottom surface; and wherein the cover flange top surface is parallel to the cover bottom surface; (f) wherein the cover flange inner surface is parallel to the cover flange outer surface; (g) wherein the can flange inner surface is parallel to the cover flange intermediate surface; (h) wherein the outer can is adapted to accommodate a power generation element, formed by winding a laminate of a positive electrode and a negative electrode separated by a separator: wherein the outer can is adapted to accommodate an electrolyte;wherein the electrolyte is dissolved in an organic solvent;wherein the positive electrode comprises LixMO2as an active material such that M comprises a transition metal;X ranges from 0.05 to 1.10;and wherein the negative electrode comprises carbonaceous material as an active material; (i) the plane of the cover top surface is in the same plane as the can flange top surface; and (j) a junction between the cover bottom surface and the cover flange intermediate surface is chamfered. 2. The battery of claim 1, wherein the plane of the cover top surface is perpendicular to the plane of the can flange inner surface.3. The battery of claim 1, wherein the plane of the cover flange bottom surface is perpendicular to the plane of the can flange inner surface.4. The battery of claim 1, wherein the plane of the cover top surface is between the plane of the cover flange top surface and the plane of a can flange bottom surface.5. The battery of claim 1, wherein the plane of the cover bottom surface is between the plane of the can wall flange top surface and the plane of a can flange bottom surface.6. The battery of claim 1, wherein the plane of the cover top surface is perpendicular to the plane of the can flange inner surface; wherein the plane of the cover flange bottom surface is perpendicular to the plane of the can flange inner surface; and wherein the plane of the cover top surface is between the plane of the cover flange top surface and the plane of a can flange bottom surface.7. The battery of claim 1, wherein the active material of the positive electrode is formed on both sides of a charge collector of the positive electrode and the active material of the negative electrode is formed on both sides of a charge collector of the negative electrode.8. A battery, comprising: (a) an outer can, the can being rectangular, the outer can having a can wall having a can wall top end, the can wall having a can wall outer surface and a can wall inner surface, the can wall outer surface and can wall inner surface being parallel to each other; (b) a can flange disposed at the can wall top end, the can flange having a can flange outer surface and a can flange inner surface, the can flange outer surface and inner surface being parallel to each other; the can flange further including a can flange top surface perpendicular to the can flange inner surface; (c) a cover having a cover top surface and a cover bottom surface; (d) the cover further including a cover flange, the cover flange having a cover flange outer surface, a cover flange inner surface, a cover flange bottom surface, a cover flange top surface, a cover flange intermediate surface disposed between the cover flange inner and outer surfaces; (e) wherein the cover flange top surface is parallel to the cover flange bottom surface; and wherein the cover flange top surface is parallel to the cover bottom surface; (f) wherein the cover flange inner surface is parallel to the cover flange outer surface; (g) wherein the can flange inner surface is parallel to the cover flange intermediate surface; (h) the plane of the cover top surface is in the same plane as the can flange top surface; (i) wherein the plane of the cover top surface is perpendicular to the plane of the can flange inner surface; wherein the plane of the cover flange bottom surface is perpendicular to the plane of the can flange inner surface; and wherein the plane of the cover top surface is between the plane of the cover flange top surface and the plane of a can flange bottom surface; and (j) wherein the outer can is adapted to accommodate a power generation element, formed by winding a laminate of a positive electrode and a negative electrode separated by a separator; wherein the outer can is adapted to accommodate an electrolyte;wherein the electrolyte is dissolved in an organic solvent;wherein the positive electrode comprises LixMO2as an active material such that M comprises a transition metal;X ranges from 0.05 to 1.10; andwherein the negative electrode comprises carbonaceous material as an active material; and (k) a junction between the cover bottom surface and the cover flange intermediate surface is chamfered. 9. The battery of claim 8, wherein the active material of the positive electrode is formed on both sides of a charge collector of the positive electrode and the active material of the negative electrode is formed on both sides of a charge collector of the negative electrode.10. The battery of claim 4, wherein the carbonaceous material further comprises at least one of a petroleum pitch, binder pitch, polymer resins, and green coke.11. The battery of claim 8, wherein the positive electrode comprises at least one of a LiCoO2, LiNiO2, LiMn2O4, and LiNiyCO(l−y)O2, wherein 0.05≦×≦1.10 and 0
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이 특허에 인용된 특허 (6)
Heller ; Jr. Bernard F. ; Jahns Scott E. ; Haeg Daniel C., Metal injection molded cover for an electrochemical cell.
Tsutsumi, Masakazu; Shishido, Hidenori, Electric storage device, electric storage apparatus, method for producing electric storage device, and method for producing cover plate.
Tsutsumi, Masakazu; Shishido, Hidenori, Electric storage device, electric storage apparatus, method for producing electric storage device, and method for producing cover plate.
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