Flexible battery, manufacturing method therefor, and auxiliary battery comprising flexible battery
AssigneeAmogreentech Co., Ltd.
InventorsSeung Yun Rho, Won Gil Choi, Hyeon Woo Cho, Ju Hee Jang, Hyeong Tak Noh, Jong Gwan Kim
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Abstract
A flexible battery is disclosed, which comprises an electrode assembly, and an exterior material for sealing the electrode assembly along with an electrolyte. Both the electrode assembly and the exterior material are formed such that patterns for contraction and extension with respect to the longitudinal direction have the same directionality in the event of being bent.
Claims20
A flexible battery comprising:
- an electrode assembly;
- and an exterior material for sealing the electrode assembly with an electrolyte,
- wherein the electrode assembly and the exterior material are formed so that patterns for contraction and extension with respect to a longitudinal direction have the same directionality in the event of being bent, and a region with the patterns includes a region in which an increased surface area ratio (Sdr) according to Equation 1 below satisfies 0.5 to 40.0:
- Increased
-
-
- surface
-
-
- area
-
-
- ratio
-
-
- (
- Sdr
- )
- =
- surface
-
-
- area
-
-
- of
-
-
- one
-
-
- region
- with
-
-
- pattern
- -
- Lx
- ×
- Ly
-
- Lx
- ×
- Ly
- ×
- 100
- ,
- [
- Equation
-
-
- 1
- ]
- and
- wherein a surface area of one region with the patterns is a surface area based on one region of the battery in which a horizontal length is Lx (mm) and a vertical length is Ly (mm).
A flexible battery comprising:
- an electrode assembly;
- and an exterior material for sealing the electrode assembly along with an electrolyte,
- wherein the electrode assembly and the exterior material are formed so that patterns for contraction and extension with respect to a longitudinal direction have the same directionality in the event of being bent, and a region with the patterns includes a region in which θ according to Equation 2 below satisfies 5.0° to 47°:
- θ(°)=tan−1(2h/p) [Equation 2)]
- wherein h is an average vertical distance (mm) between the top and the bottom of adjacent crests and troughs in the pattern formed in the flexible battery and p is an average horizontal distance (mm) between the tops of two adjacent crests.
A method for manufacturing a flexible battery in which an electrode assembly is sealed by an exterior material together with an electrolyte, wherein
- the electrode assembly and the exterior material include patterns for contraction and extension with respect to the longitudinal direction in the event of being bent, respectively,
- the patterns are formed by matching the pattern formed on the electrode assembly and the pattern formed on the exterior material with each other and simultaneously pressurizing the electrode assembly and the exterior material so that an increased surface area ratio (Sdr) according to Equation 1 below satisfies 0.5 to 40.0:
- Increased
-
-
- surface
-
-
- area
-
-
- ratio
-
-
- (
- Sdr
- )
- =
- surface
-
-
- area
-
-
- of
-
-
- one
-
-
- region
- with
-
-
- pattern
- -
- Lx
- ×
- Ly
-
- Lx
- ×
- Ly
- ×
- 100
- [
- Equation
-
-
- 1
- ]
- wherein , a surface area of one region with the patterns is a surface area based on one region of the battery in which a horizontal length is Lx (mm) and a vertical length is Ly (mm).
Dependencies are inferred from the claim text.