Stepwise electrode assembly having variously-shaped corner and secondary battery, battery pack and device comprising the same
First Claim
1. An electrode having an asymmetric structure, comprising:
- a planar sheet of material having a first end and an opposed second end, anda tab extending away from the first end of the planar sheet,wherein the planar sheet has a generally rectangular perimeter, with at least one corner of the perimeter having an asymmetric structure with respect to a central axis normal to the planar sheet,wherein the planar sheet extends along a length direction, extends along a width direction, defines a maximum length along the length direction, and defines first and second linear edges spaced apart along the width direction, each of the first and second linear edges being shorter than the maximum length,wherein the first and second linear edges each include a first endpoint adjacent the first end of the planar sheet and a second endpoint adjacent the second end of the planar sheet,wherein the perimeter of the planar sheet at the first and second endpoints of each of the first and second linear edges extends toward the opposing linear edge in a direction substantially parallel to the width direction, andwherein a depth of the first endpoints measured from the first end of the planar sheet is smaller than a depth of the second endpoints measured from the second end of the planar sheet.
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Accused Products
Abstract
There is provided an electrode assembly having steps including: a first electrode stair including at least one first electrode unit; and a second electrode stair including at least one second electrode unit having an area different from that of the first electrode unit, wherein the first electrode stair and the second electrode stair are stacked to be adjacent, separated by at least one separator as a boundary therebetween and including one or more electrode laminates having steps formed by a difference between areas of the first electrode stair and the second electrode stair, and shapes of the corners of the first electrode stair and the second electrode stair having steps are different. There is also provided a secondary battery including the electrode assembly. Secondary batteries having various designs without restriction in shapes of corners of electrode units can be provided.
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Citations
32 Claims
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1. An electrode having an asymmetric structure, comprising:
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a planar sheet of material having a first end and an opposed second end, and a tab extending away from the first end of the planar sheet, wherein the planar sheet has a generally rectangular perimeter, with at least one corner of the perimeter having an asymmetric structure with respect to a central axis normal to the planar sheet, wherein the planar sheet extends along a length direction, extends along a width direction, defines a maximum length along the length direction, and defines first and second linear edges spaced apart along the width direction, each of the first and second linear edges being shorter than the maximum length, wherein the first and second linear edges each include a first endpoint adjacent the first end of the planar sheet and a second endpoint adjacent the second end of the planar sheet, wherein the perimeter of the planar sheet at the first and second endpoints of each of the first and second linear edges extends toward the opposing linear edge in a direction substantially parallel to the width direction, and wherein a depth of the first endpoints measured from the first end of the planar sheet is smaller than a depth of the second endpoints measured from the second end of the planar sheet. - View Dependent Claims (2, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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3. An electrode having an asymmetric structure, comprising:
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a planar sheet of material having a first end, an opposed second end, and a generally rectangular perimeter, with at least one corner of the perimeter having an asymmetric structure with respect to a central axis normal to the electrode, wherein the electrode extends along a length direction, extends along a width direction, defines a maximum length along the length direction, and defines first and second linear edges spaced apart along the width direction, each of the first and second linear edges being shorter than the maximum length, wherein the first and second linear edges each include a first endpoint adjacent the first end of the planar sheet and a second endpoint adjacent the second end of the planar sheet, wherein the perimeter of the electrode at the first and second endpoints of each of the first and second linear edges first extends toward the opposing linear edge in a first direction substantially parallel to the width direction, and then extends in a second direction that is angled with respect to the first direction, and wherein a depth of the first endpoints measured from the first end of the planar sheet is smaller than a depth of the second endpoints measured from the second end of the planar sheet.
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4. An electrode having an asymmetric structure, comprising:
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a planar sheet of material having a first end, an opposed second end, and a generally rectangular perimeter including four edges and four corners each connecting a pair of the edges, each corner having a notched perimeter extending inward from the edges toward a central axis normal to the electrode, at least one of the notched perimeters having an asymmetric structure with respect to the central axis different from the asymmetric structure of another one of the notched perimeters, wherein the electrode extends along a length direction, extends along a width direction, defines a maximum length along the length direction, and defines first and second linear edges spaced apart along the width direction, each of the first and second linear edges being shorter than the maximum length, wherein the first and second linear edges each include a first endpoint adjacent the first end of the planar sheet and a second endpoint adjacent the second end of the planar sheet, wherein the perimeter of the electrode at the first and second endpoints of each of the first and second linear edges extends toward the opposing linear edge in a direction substantially parallel to the width direction, and wherein a depth of the first endpoints measured from the first end of the planar sheet is smaller than a depth of the second endpoints measured from the second end of the planar sheet. - View Dependent Claims (5)
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Specification