Electrode assembly and secondary battery including the same
AssigneeSamsung SDI Co., Ltd.
InventorsHyunhwa SONG, Junwon SUH, Jeong-Doo YI, Juhee SOHN
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Abstract
An electrode assembly and a secondary battery including the same, the electrode assembly including a plurality of first polar plates, each first polar plate including a first coating portion coated with a first active material, and a bent first non-coated portion; a plurality of second polar plates, each second polar plate including a second coating portion coated as a second active material, and a bent second non-coated portion; and a plurality of separators between the first polar plates and the second polar plates.
Claims16
An electrode assembly, comprising:
- a plurality of first polar plates, each first polar plate including:
- a first coating portion coated with a first active material, and
- a bent first non-coated portion;
- a plurality of second polar plates, each second polar plate including:
- a second coating portion coated as a second active material, and
- a bent second non-coated portion;
- and
- a plurality of separators between the first polar plates and the second polar plates.
The electrode assembly as claimed in 1, wherein:
- the plurality of first polar plates includes a plurality of first non-coated portions,
- the plurality of second polar plates includes a plurality of second non-coated portions, and
- the plurality of first non-coated portions and the plurality of second non-coated portions are each bent in a Z shape.
The electrode assembly as claimed in 2, wherein the first polar plates that include the first coating portion and the second polar plates that include the second coating portion are alternately stacked in a stack portion of the electrode assembly.
The electrode assembly as claimed in 1, wherein:
- the plurality of first polar plates includes a plurality of first non-coated portions,
- the plurality of second polar plates includes a plurality of second non-coated portions, and
- the plurality of first non-coated portions and the plurality of second non-coated portions are each bent in a shape in which the first non-coated portions or the second non-coated portions are repeatedly folded back on one another in alternating directions.
The electrode assembly as claimed in 1, wherein:
- the plurality of first polar plates includes a plurality of first non-coated portions,
- the plurality of second polar plates includes a plurality of second non-coated portions, and
- the plurality of first non-coated portions and the plurality of second non-coated portions are each bent to have a corrugated shape.
The electrode assembly as claimed in 1, wherein:
- the first polar plates are stacked in a first direction with a first interval therebetween,
- the second polar plates are stacked in the first direction with a second interval therebetween, and
- the first interval is equal to the second interval.
The electrode assembly as claimed in 6, wherein a width of the bent first non-coated portion in the first direction is equal to or smaller than the first interval.
The electrode assembly as claimed in 1, wherein:
- the plurality of first polar plates includes a plurality of first non-coated portions stacked at one side of a first end of the electrode assembly, and
- the plurality of second polar plates includes a plurality of second non-coated portions stacked at another side of the first end of the electrode assembly.
A secondary battery, comprising an electrode assembly and a case accommodating the electrode assembly, the electrode assembly including:
- a plurality of first polar plates, each first polar plate including:
- a first coating portion coated with a first active material, and
- a bent first non-coated portion;
- a plurality of second polar plates, each second polar plate including:
- a second coating portion coated as a second active material, and
- a bent second non-coated portion;
- and
- a plurality of separators between the first polar plates and the second polar plates.
The secondary battery as claimed in 9, wherein:
- the plurality of first polar plates includes a plurality of first non-coated portions,
- the plurality of second polar plates includes a plurality of second non-coated portions, and
- the plurality of first non-coated portions and the plurality of second non-coated portions are each bent in a Z shape.
The secondary battery as claimed in 9, wherein the first polar plates that include the first coating portion and the second polar plates that include the second coating portion are alternately stacked in a stack portion of the electrode assembly.
The secondary battery as claimed in 9, wherein:
- the plurality of first polar plates includes a plurality of first non-coated portions,
- the plurality of second polar plates includes a plurality of second non-coated portions, and
- the plurality of first non-coated portions and the plurality of second non-coated portions are each bent in a shape in which the first non-coated portions or the second non-coated portions are repeatedly folded back on one another in alternating directions.
The secondary battery as claimed in 9, wherein:
- the plurality of first polar plates includes a plurality of first non-coated portions,
- the plurality of second polar plates includes a plurality of second non-coated portions, and
- the plurality of first non-coated portions and the plurality of second non-coated portions are each bent to have a corrugated shape.
The secondary battery as claimed in 9, wherein:
- the first polar plates are stacked in a first direction with a first interval therebetween,
- the second polar plates are stacked in the first direction with a second interval therebetween, and
- the first interval is equal to the second interval.
The secondary battery as claimed in 14, wherein a width of the bent first non-coated portion in the first direction is equal to or smaller than the first interval.
The secondary battery as claimed in 9, wherein:
- the plurality of first polar plates includes a plurality of first non-coated portions stacked at one side of a first end of the electrode assembly, and
- the plurality of second polar plates includes a plurality of second non-coated portions stacked at another side of the first end of the electrode assembly.
Dependencies are inferred from the claim text.