Electrode assembly and secondary battery using the same
AssigneeSamsung SDI Co., Ltd.
InventorsCheon-Soo Kim, Dac-Junc Jeong
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Abstract
An electrode assembly of a secondary battery includes an electrode group including a first electrode plate, a separator, and a second electrode plate that are stacked and wound, and a finishing tape attached to a predetermined region of a terminal portion of the electrode group. The finishing tape satisfies the equation Y1=tensile strength×thickness of finishing tape/modulus of elasticity, with Y1 ranging from 64 to 89. Alternatively, the finishing tape includes a film layer and an adhesive layer, and satisfies the equation Y2=tensile strength×thickness of film layer of finishing tape/modulus of elasticity, with Y2 ranging from 51 to 75. The finishing tape effectively prevents an increase in the thickness of a high-capacity secondary battery.
Claims22
An electrode assembly comprising:
- an electrode group comprising a first electrode plate, a separator, and a second electrode plate that are sequentially stacked and wound;
- and
- a finishing tape attached to a predetermined region of a terminal portion of the electrode group;
- wherein the finishing tape satisfies the following equation, with Y1 ranging from 64 to 89 when a tensile strength of the finishing tape is expressed in kgf/cm2, a thickness of the finishing tape is expressed in μm, and a modulus of elasticity of the finishing tape is expressed in kgf/mm2:
- Y
-
-
- 1
- =
- tensile
-
-
- strength
- ×
- thickness
-
-
- of
-
-
- finishing
-
-
- tape
- modulus
-
-
- of
-
-
- elasticity
- .
An electrode assembly comprising:
- an electrode group comprising a first electrode plate, a separator, and a second electrode plate that are sequentially stacked and wound;
- and
- a finishing tape attached to a predetermined region of a terminal portion of the electrode group;
- wherein the finishing tape comprises a film layer and an adhesive layer, and satisfies the following equation, with Y2 ranging from 51 to 75 when a tensile strength of the finishing tape is expressed in kgf/cm2, a thickness of the film layer of the finishing tape is expressed in μm, and a modulus of elasticity of the finishing tape is expressed in kgf/mm2:
- Y
-
-
- 2
- =
- tensile
-
-
- strength
- ×
- thickness
-
-
- of
-
-
- film
-
-
- layer
-
-
-
- of
-
-
- finishing
-
-
- tape
- modulus
-
-
- of
-
-
- elasticity
- .
A secondary battery comprising:
- an electrode assembly comprising:
- an electrode group comprising a first electrode plate, a separator, and a second electrode plate that are sequentially stacked and wound;
- and
- a finishing tape attached to a predetermined region of a terminal portion of the electrode group;
- a housing having the electrode assembly disposed therein;
- and
- an electrolyte injected into a margin between the housing and the electrode assembly;
- wherein the finishing tape satisfies the following equation, with Y1 ranging from 64 to 89 when a tensile strength of the finishing tape is expressed in kgf/cm2, a thickness of the finishing tape is expressed in μm, and a modulus of elasticity of the finishing tape is expressed in kgf/mm2:
- Y
-
-
- 1
- =
- tensile
-
-
- strength
- ×
- thickness
-
-
- of
-
-
- finishing
-
-
- tape
- modulus
-
-
- of
-
-
- elasticity
- .
A secondary battery comprising:
- an electrode assembly comprising:
- an electrode group comprising a first electrode plate, a separator, and a second electrode plate that are sequentially stacked and wound;
- and
- a finishing tape attached to a predetermined region of a terminal portion of the electrode group;
- a housing having the electrode assembly disposed therein;
- and
- an electrolyte injected into a margin between the housing and the electrode assembly;
- wherein the finishing tape comprises a film layer and an adhesive layer, and satisfies the following equation, with Y2 ranging from 51 to 75 when a tensile strength of the finishing tape is expressed in kgf/cm2, a thickness of the film layer of the finishing tape is expressed in μm, and a modulus of elasticity of the finishing tape is expressed in kgf/mm2:
- Y
-
-
- 2
- =
- tensile
-
-
- strength
- ×
- thickness
-
-
- of
-
-
- film
-
-
- layer
-
-
-
- of
-
-
- finishing
-
-
- tape
- modulus
-
-
- of
-
-
- elasticity
- .
Dependencies are inferred from the claim text.