Electrode drying method capable of suppressing binder swelling and electrode drying system using same
AssigneeLG Energy Solution, Ltd.
InventorsChang Ju Lee, Sang Wook Woo, Suk In Noh
Life of this patent
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Abstract
An electrode drying method including: constant-rate-drying an electrode substrate coated with an electrode slurry while the electrode substrate is moved in a state that the electrode substrate makes a tilt angle with a horizontal plane; and falling-rate-drying the electrode substrate while the electrode substrate is horizontally moved. The electrode drying method and related system provide suppression of a floating phenomenon of binder elements during a drying process of an electrode and improve adhesive force between an electrode mixture layer and an electrode current collector.
Claims11
A method for drying an electrode, the method comprising:
- constant-rate-drying an electrode substrate coated with an electrode slurry while the electrode substrate is moved in a state that the electrode substrate makes a tilt angle with a horizontal plane;
- and
- falling-rate-drying the electrode substrate while the electrode substrate is horizontally moved,
- wherein the constant-rate-drying includes n sections,
- wherein a movement angle in a p-th section and a movement angle in a q-th section satisfy following condition 1:
- |θp−θQ|>10(°), [Condition 1]
- wherein the θp denotes the movement angle in the p-th section,
- wherein θq denotes the movement angle in the q-th section,
- wherein the n is an integer equal to or greater than 2, and
- wherein each of the p and the q is an integer between 1 and the n, and the p is different from the q.
A system for drying an electrode, the system comprising:
- a conveyor line which is configured to be moved in a state that an electrode substrate, which is obtained by applying an electrode slurry on at least one surface of an electrode current collector, is disposed on the conveyor line;
- and
- a heating unit which is located on a moving path of the conveyor line is configured to heat an electrode sheet,
- wherein the conveyor line includes:
- a constant-rate-drying section where the conveyor line is configured to be moved while forming a tilt angle with a horizontal plane;
- and
- a falling-rate-drying section where the conveyor line is configured to be horizontally moved, at a region where the conveyor line passes through the heating unit, and
- wherein the constant-rate-drying section includes n sections,
- wherein a movement angle in a p-th section and a movement angle in a q-th section satisfy following condition 1:
- |θp−θq|>10(°), [Condition 1]
- wherein the θp denotes the movement angle in the p-th section,
- wherein θq denotes the movement angle in the q-th section,
- wherein the n is an integer equal to or greater than 2, and
- wherein each of the p and the q is an integer between 1 and the n, and the p is different from the q.
Dependencies are inferred from the claim text.